PREMIXER AND GAS DEVICE

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese Patent Application No. 202411999235.6, and filed on December 31, 2024, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the technical field of gas heating, and in particular to a premixer and a gas device.

BACKGROUND

Gas device such as gas water heaters, wall-mounted boilers, gas stoves, etc. usually adopt a completely premixed combustion method. Completely premixed combustion refers to the process in which air and gas are completely mixed in a certain proportion to form a premixed gas-air, and the premixed gas-air is ignited and burned in the burner.

The premixer is an important component in the completely premixed gas device. The premixer mixes air and gas in a certain proportion to ensure that the best air-fuel ratio can be maintained during the combustion process. The existing premixer has a single function and cannot be applied to different gas sources, and has poor applicability.

SUMMARY

The main purpose of the present application is to propose a premixer and a gas device, aiming to improve the applicability of the premixer.

To achieve at least the above purpose, the premixer provided by the present application includes:

a premixer body, provided with a gas channel;

a gas distribution member; the gas distribution member is at least partially provided in the gas channel, and the gas distribution member is provided with a first gas distribution hole and a second gas distribution hole respectively communicating with the gas channel; a figure formed by the first gas distribution hole and a figure formed by the second gas distribution hole are non-congruent figures;

an adjustment shaft; the adjustment shaft is at least partially rotatably provided in the gas channel; and

a gas regulator, provided at the adjustment shaft and located in the gas channel; the gas regulator is capable of rotating synchronously with the adjustment shaft, and the gas regulator is capable of rotating to completely or partially unblock or block the first gas distribution hole and/or the second gas distribution hole, to adjust a gas flow area of the first gas distribution hole and/or the second gas distribution hole, and adjust a gas amount flowing through the first gas distribution hole and/or a gas amount flowing through the second gas distribution hole.

The present application further provides a premixer, including:

a premixer body provided with a gas channel and a gas distribution chamber provided in the gas channel; an inner wall of the gas distribution chamber is provided in a cylindrical shape, and a side wall of the gas distribution chamber is provided with a first gas distribution hole, a second gas distribution hole and a gas inlet hole; a figure formed by the first gas distribution hole and a figure formed by the second gas distribution hole are non-congruent figures;

an adjustment shaft rotatably provided in the gas distribution chamber;

a gas regulator provided at a part of an outer peripheral wall of the adjustment shaft; the gas regulator is provided with an arc-shaped outer wall surface adapted to the inner wall of the gas distribution chamber; the gas regulator is provided outside the gas inlet hole to make the gas inlet hole be in a normally open state;

when the gas regulator rotates within a first angle range, the gas regulator completely or partially opens the first gas distribution hole and completely covers the second gas distribution hole; and

when the gas regulator rotates within a second angle range, the gas regulator completely or partially opens the second gas distribution hole and completely covers the first gas distribution hole.

The present application further provides a gas device, including: the premixer.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

FIG. 1 is a structural schematic diagram of a premixer according to an embodiment of the present application.

FIG. 2 is an exploded schematic diagram of the structure in FIG. 1.

FIG. 3 is a cross-sectional diagram of the air regulator and the gas regulator in FIG. 1 at a viewing angle of 0 degrees in the first angle range.

FIG. 4 is a structural cross-sectional diagram of the air regulator and the gas regulator in FIG. 1 at another viewing angle of 0 degrees in the first angle range.

FIG. 5 is a structural schematic diagram of the structure in FIG. 4 at another viewing angle.

FIG. 6 is a cross-sectional diagram of the air regulator and the gas regulator in FIG. 1 at a viewing angle of 90 degrees in the first angle range.

FIG. 7 is a structural cross-sectional diagram of the air regulator and the gas regulator in FIG. 1 at another viewing angle of 90 degrees in the first angle range.

FIG. 8 is a structural schematic diagram of the structure in FIG. 7 at another viewing angle.

FIG. 9 is a partial structural schematic diagram of the premixer according to an embodiment of the present application.

FIG. 10 is an exploded schematic diagram of the structure in FIG. 9.

FIG. 11 is a structural schematic diagram of the gas distribution member in FIG. 10.

FIG. 12 is a structural schematic diagram of a partial structure in FIG. 10.

FIG. 13 is a structural schematic diagram of the structure in FIG. 12 from another perspective.

FIG. 14 is a schematic diagram of the first notch and the second notch of the first gas supply notch in FIG. 13.

FIG. 15 is a structural schematic diagram of the structure in FIG. 13 from another perspective.

FIG. 16 is a schematic diagram of the third notch and the fourth notch of the second gas supply notch in FIG. 15.

FIG. 17 is a structural schematic diagram of the venturi tube in FIG. 2.

FIG. 18 is a cross-sectional diagram of the structure in FIG. 17.

Explanation of reference signs:

10, premixer; 100, premixer body; 110, gas channel; 111, gas uniform-flow chamber; 112, corner; 120, air channel; 130, gas-air mixed channel; 140, base; 150, cover plate; 160, regulator; 170, air regulator; 200, gas distribution member; 201, first side wall; 202, second side wall; 203, third side wall; 204, fourth side wall; 210, first gas distribution hole; 220, second gas distribution hole; 230, gas distribution chamber; 240, gas inlet hole; 250, first installation hole; 260, second installation hole; 300, adjustment shaft; 400, gas regulator; 410, first gas adjustment part; 420, second gas adjustment part; 430, first gas supply notch; 431, first notch; 432, second notch; 440, second gas supply notch; 441, third notch; 442, fourth notch; 450, first gas shielding portion; 460, second gas shielding portion; 500, venturi tube; 510, venturi channel; 520, air inlet; 530, gas injection inlet; 540, gas-air-mixture outlet; 550, first pipe section; 551, tapered section; 552, transition section; 560, second pipe section; 570, connection portion; 600, first sealer; 700, second sealer.

The realization of the purpose, functional features and advantages of the present application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION OF EMBODIMENTS

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indication is only configured to explain the relative position relationship, movement, etc. between the components under a specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of the present application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to “first” and “second” can explicitly or implicitly include at least one of the features. In addition, if “and/or” appears in the full text, its meaning includes three parallel schemes. Taking “A and/or B” as an example, it includes scheme A, scheme B, or schemes that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

Gas device such as gas water heaters, wall-mounted boilers, gas stoves, etc. usually adopt a completely premixed combustion method. Completely premixed combustion refers to the process in which air and gas are completely mixed in a certain proportion in advance to form a premixed gas-air, and the premixed gas-air is then ignited and burned in the burner.

The premixer is an important component in the completely premixed gas-air device. The premixer mixes air and gas in a certain proportion to ensure that the optimal air-fuel ratio can be maintained during the combustion process. The existing premixer has a single function, cannot be applied to different gas sources, and has poor applicability.

Based on this, the present application proposes a premixer and a gas device including the premixer. The premixer has good applicability and can be switched for use with different gas sources. The premixer can be applied to gas device such as gas water heaters, wall-mounted boilers, and gas stoves. The gas device can also include a burner and a fan. After the air and gas are mixed into a premixed gas-air in the premixer, the premixed air enters the burner under the action of the fan and flows out of the burner through the burner’s fire hole to achieve ignition and combustion. The structure of the premixer of the present application will be described below in the form of an embodiment.

The thick solid arrow in the accompanying drawings indicates the flow direction of the air; the thick dashed arrow indicates the flow direction of the gas; the thick double-dash arrow indicates the flow direction of the mixed gas after the air and gas are mixed.

Referring to FIGS. 1 to 8, in an embodiment of the present application, a premixer 10 includes a premixer body 100, a gas distribution member 200, an adjustment shaft 300 and a gas regulator 400. The premixer body 100 has a gas channel 110. At least a portion of the gas distribution member 200 is provided in the gas channel 110. The gas distribution member 200 is provided with a first gas distribution hole 210 and a second gas distribution hole 220 respectively communicated with the gas channel 110. The figure formed by the first gas distribution hole 210 and the figure formed by the second gas distribution hole 220 are non-congruent figures. At least a portion of the adjustment shaft 300 is rotatably provided in the gas channel 110; the gas regulator 400 is provided at the adjustment shaft 300 and is located in the gas channel 110, and the gas regulator 400 can rotate synchronously with the adjustment shaft 300; the gas regulator 400 is capable of rotating to completely or partially unblock or block the first gas distribution hole 210 and/or the second gas distribution hole 220, so as to adjust the gas flow area of the first gas distribution hole 210 and/or the second gas distribution hole 220, and adjust the gas amount flowing through the first gas distribution hole 210 and/or adjust the gas amount flowing through the second gas distribution hole 220.

It can be understood that the gas channel 110 is configured for gas inflow, and the type of gas is not limited, for example but not limited to: natural gas, liquefied petroleum gas, biogas, synthetic gas, etc. The size and location of the gas channel 110 are not limited, and are specifically set according to needs.

The shape of the gas distribution member 200 is not limited, and can be plate-shaped, cylindrical or some other shapes. The gas distribution member 200 can be fixed in the gas channel 110 and form an integral structure with the inner wall of the channel, or the gas distribution member 200 can be detachably provided in the gas channel 110. In an embodiment, the premixer body 100 includes a base 140. The base 140 has a gas channel 110, and the gas distribution member 200 and the base 140 can be detachably provided, or the gas distribution member 200 and the base 140 are an integral structure.

The gas distribution member 200 is provided with a first gas distribution hole 210 and a second gas distribution hole 220, and the first gas distribution hole 210 and the second gas distribution hole 220 can be provided at intervals. The first gas distribution hole 210 and the second gas distribution hole 220 are configured to allow two different gases to pass through, and the type of gas is not limited. For example, but not limited to: the first gas distribution hole 210 is configured to allow natural gas to pass through, and the second gas distribution hole 220 is configured to allow liquefied petroleum gas to pass through; or, the first gas distribution hole 210 is configured to allow liquefied petroleum gas to pass through, and the second gas distribution hole 220 is configured to allow natural gas to pass through. The specific setting can be performed as needed.

The first gas distribution hole 210 and the second gas distribution hole 220 are configured to distribute the gas flowing into the gas channel 110. The number of the first gas distribution holes 210 can be one or more, and the specific setting is not limited here. When the number of the first gas distribution holes 210 is multiple, the area size of the first gas distribution holes 210 is not limited. For example, the area of any two first gas distribution holes 210 is the same, or the area of at least two first gas distribution holes 210 is different. The number of the second gas distribution holes 220 can be one or more. When there are multiple second gas distribution holes 220, the area size of the second gas distribution holes 220 is not limited, for example, the areas of any two second gas distribution holes 220 are the same, or the areas of at least two second gas distribution holes 220 are different.

The shape and size of the first gas distribution hole 210 and the second gas distribution hole 220 are not limited, and it is only necessary that the figure formed by the first gas distribution hole 210 and the figure formed by the second gas distribution hole 220 are non-congruent figures, that is, the figure formed by the first gas distribution hole 210 and the second gas distribution hole 220 cannot completely overlap; by adjusting the gas amount flowing through the first gas distribution hole 210 and/or adjusting the gas amount flowing through the second gas distribution hole 220 through the gas regulator 400, the switching use of two different gases can be realized, so that the change curve of the gas regulator 400 adjusting the gas flow area of the first gas distribution hole 210 is not completely the same as the change curve of the gas regulator 400 adjusting the gas flow area of the second gas distribution hole 220, so as to adapt to different gases.

The adjustment shaft 300 can be driven by the regulator 160, and the regulator 160 drives the adjustment shaft 300 to rotate, so as to drive the gas regulator 400 to rotate synchronously; the regulator 160 can be a motor.

It should be noted that the gas regulator 400 in the present application covers the first gas distribution hole 210, which means that the gas regulator 400 blocks, shields or covers the first gas distribution hole 210 to prevent the gas from passing through the first gas distribution hole 210 as much as possible. The gas regulator 400 can fit with the wall surface of the gas distribution member 200 at the first gas distribution hole 210; or, there is a small gap between the gas regulator 400 and the wall surface of the gas distribution member 200 at the first gas distribution hole 210 to allow a small gas amount to pass due to assembly and part processing errors, and the gas amount passing through the gap will not affect the use of the premixer 10. In other words, the meaning of covering in the present application is different from the meaning of sealing. Similarly, the gas regulator 400 in the present application covers the second gas distribution hole 220, which means that the gas regulator 400 blocks, shields or covers the second gas distribution hole 220 to prevent the gas from passing through the second gas distribution hole 220 as much as possible.

The gas regulator 400 opens the first gas distribution hole 210, which means that the covered first gas distribution hole 210 opens or uncovered so that the gas can flow through the first gas distribution hole 210. Similarly, the gas regulator 400 opens the second gas distribution hole 220, which means that the covered second gas distribution hole 220 opens or uncovered so that the gas can flow through the second gas distribution hole 220.

The specific structure and shape of the gas regulator 400 are not limited, and can be in the form of a block or a plate, etc. It is sufficient that the gas regulator 400 can adjust the gas flow area of the first gas distribution hole 210 and/or the second gas distribution hole 220, that is, it can adjust the gas intake amount of the first gas distribution hole 210 and/or the gas intake amount of the second gas distribution hole 220.

When the gas regulator 400 rotates synchronously with the adjustment shaft 300, it can unblock or block only the first gas distribution hole 210 as needed, or only unblock or block the second gas distribution hole 220, or it can adjust the first gas distribution hole 210 and the second gas distribution hole 220 at the same time, so as to adjust the gas flow area of the first gas distribution hole 210 and/or the second gas distribution hole 220, that is, adjust the gas flow amount of the corresponding gas flow area, so that the present application has multiple adjustment methods, and the premixer 10 has good applicability to meet the needs of different gases and gas flows.

In the technical solution of the present application, the premixer 10 includes a premixer body 100, a gas distribution member 200, an adjustment shaft 300 and a gas regulator 400. The gas distribution member 200 is provided with a first gas distribution hole 210 and a second gas distribution hole 220 which are respectively communicated with the gas channel 110. The figure formed by the first gas distribution hole 210 and the figure formed by the second gas distribution hole 220 are non-congruent figures, so that the figure formed by the first gas distribution hole 210 and the second gas distribution hole 220 cannot completely overlap. The gas regulator 400 is provided at the adjustment shaft 300 and is located in the gas channel 110. The gas regulator 400 can rotate synchronously with the adjustment shaft 300. The gas regulator 400 is capable of rotating to completely or partially unblock or block the first gas distribution hole 210 and/or the second gas distribution hole 220 to adjust the gas flow area of the first gas distribution hole 210 and/or the second gas distribution hole 220, and adjust the gas amount flowing through the first gas distribution hole 210 and/or the gas amount flowing through the second gas distribution hole 220. In this way, the first gas distribution hole 210 and the second gas distribution hole 220 can be provided with two different gases, and the figures formed by the first gas distribution hole 210 and the second gas distribution hole 220 cannot completely overlap. The gas regulator 400 adjusts the gas amount flowing through the first gas distribution hole 210 and/or the gas amount flowing through the second gas distribution hole 220, so that the switching use of two different gases can be realized. The change curve of the gas regulator 400 adjusting the gas flow area of the first gas distribution hole 210 is not completely the same as the change curve of the gas flow area of the second gas distribution hole 220, so as to meet the needs of different gas loads, increase the flexibility of the gas regulator 400, so that the premixer 10 of the present application can be configured for different gas switching, so as to meet the use needs of different gas sources in different regions. The premixer 10 of the present application has good applicability and can be widely used.

In an embodiment, the gas regulator 400 is capable of rotating to selectively completely or partially open one of the first gas distribution hole 210 and the second gas distribution hole 220, and completely cover the other of the first gas distribution hole 210 and the second gas distribution hole 220, so as to adjust the gas flow area of the first gas distribution hole 210 or the second gas distribution hole 220, and adjust the gas amount flowing through the first gas distribution hole 210 or the gas amount flowing through the second gas distribution hole 220.

It can be understood that, from the foregoing content, the meaning of covering in the present application is different from the meaning of sealing. Similarly, the meaning of full covering in the present application is different from the meaning of full sealing. The meaning of opening in the present application means full or partial opening; while covering means full covering, that is, preventing the gas from passing as much as possible.

In this embodiment, by rotating the gas regulator 400, the gas is selectively passed through one of the first gas distribution hole 210 and the second gas distribution hole 220, and the other is completely covered, so as to adjust the gas amount flowing through the first gas distribution hole 210 or the second gas distribution hole 220. The first gas distribution hole 210 and the second gas distribution hole 220 are adapted to two different gases, so that the switching use of two different gases can be realized.

In an embodiment, when the gas regulator 400 rotates within the first angle range, the gas regulator 400 completely or partially opens the first gas distribution hole 210 and completely covers the second gas distribution hole 220; when the gas regulator 400 rotates within the second angle range, the gas regulator 400 completely or partially opens the second gas distribution hole 220 and completely covers the first gas distribution hole 210.

It can be understood that the specific numerical ranges of the first angle range and the second angle range are not limited. The first angle range and the second angle range may partially overlap, or the first angle range and the second angle range have no overlapping range. For example, but not limited to: the first angle range may be 0 to 45 degrees, or 0 to 60 degrees, or 0 to 90 degrees, or 0 to 180 degrees, or 0 to 270 degrees, etc.; the second angle range may be an angle range outside the first angle range, for example, 60 to 180 degrees, or 90 to 180 degrees, or 90 to 270 degrees, or 90 to 360 degrees, or 180 to 270 degrees, or 180 to 360 degrees, or 270 to 360 degrees, etc.

For ease of understanding, it is defined that, the first gas distribution hole 210 is used for a first gas to pass through, and the second gas distribution hole 220 is used for a second gas to pass through.

In an embodiment, the number of the gas regulator 400 may be one, and the gas amount flowing through the first gas distribution hole 210 or the gas amount flowing through the second gas distribution hole 220 is adjusted by one gas regulator 400.

In another embodiment, the gas regulator 400 includes at least two adjustment parts, and the gas amount flowing through the first gas distribution hole 210 or the gas amount flowing through the second gas distribution hole 220 is adjusted by the at least two adjustment parts.

When the gas regulator 400 rotates within the first angle range, the gas regulator 400 adjusts the gas flow area of the first gas distribution hole 210 to adjust the gas amount of the first gas flowing through the first gas distribution hole 210. At this time, since the gas regulator 400 covers the second gas distribution hole 220, so that the first gas cannot flow along the second gas distribution hole 220. When the gas regulator 400 rotates within the second angle range, the gas regulator 400 adjusts the gas flow area of the second gas distribution hole 220 to adjust the gas amount of the second gas flowing through the second gas distribution hole 220. At this time, since the gas regulator 400 covers the first gas distribution hole 210, so that the second gas cannot flow along the first gas distribution hole 210. It can be seen that this solution enables the premixer 10 to switch between two different gases by rotating the gas regulator 400, to meet the use needs of different gas sources in different regions. The premixer 10 has good applicability.

In an embodiment, the first angle range and the second angle range have no overlapping range. For example, the first angle range is 0 degrees to 90 degrees, and the second angle range is 180 degrees to 270 degrees; or, the first angle range is 90 degrees to 180 degrees, and the second angle range is 270 degrees to 360 degrees, etc., which are not specifically limited here.

With reference to FIGS. 2 to 10, in an embodiment, the gas distribution member 200 has a gas distribution chamber 230 and a gas inlet hole 240, a first gas distribution hole 210, and a second gas distribution hole 220 respectively communicated with the gas distribution chamber 230. The gas regulator 400 is rotatably provided in the gas distribution chamber 230, and the gas inlet hole 240 is configured to communicate with an external gas source.

It is understandable that the specific shape of the gas distribution chamber 230 is not limited here, and it is only necessary that the gas regulator 400 can be adapted to the gas distribution chamber 230. External gas can flow into the gas distribution chamber 230 through the gas inlet hole 240.

When the gas regulator 400 opens the first gas distribution hole 210 or the second gas distribution hole 220, the external gas can flow into the gas distribution chamber 230 from the gas inlet hole 240, and flow into the gas-air mixed channel 130 after passing through the first gas distribution hole 210 or the second gas distribution hole 220; correspondingly, when the gas regulator 400 covers the second gas distribution hole 220 or the first gas distribution hole 210, the gas regulator 400 fits the inner chamber wall of the gas distribution chamber 230 or has a small gap, so that the gas in the gas distribution chamber 230 cannot flow out from the second gas distribution hole 220 or the first gas distribution hole 210. It should be noted that when there is a small gap between the gas regulator 400 and the inner chamber wall of the gas distribution chamber 230 at the first gas distribution hole 210 or the second gas distribution hole 220, the small gap is for the gas regulator 400 to rotate in the gas distribution chamber 230 and for assembly and process errors, and the gas amount flowing out of the small gap is very small or can be ignored.

In this solution, by setting the gas distribution chamber 230, the gas inlet hole 240, the first gas distribution hole 210 and the second gas distribution hole 220 on the gas distribution member 200, the gas regulator 400 rotates in the gas distribution chamber 230; one of the first gas distribution hole 210 and the second gas distribution hole 220 can be completely or partially opened, and the other of the first gas distribution hole 210 and the second gas distribution hole 220 can be completely covered, so as to adjust the gas flow area of the first gas distribution hole 210 or the second gas distribution hole 220, thereby adjusting the intake amount of the first gas or the intake amount of the second gas. The adjustment method of this solution is simple and easy to implement, which is conducive to simplifying the structure of the premixer 10.

In an embodiment, the gas regulator 400 includes a fan-shaped baffle. In the first angle range, the fan-shaped baffle completely covers the second gas distribution hole 220; in the second angle range, the fan-shaped baffle completely covers the first gas distribution hole 210.

It can be understood that the structural shape of the fan-shaped baffle is not limited, for example but not limited to: the fan-shaped baffle can be in the form of a sheet, such as a fan-shaped baffle sheet; or the fan-shaped baffle can be in the form of a block, such as a fan-shaped baffle block. The number of fan-shaped baffle sheets or fan-shaped baffles is also not limited, and is specifically set according to needs. The fan-shaped baffle has an arc-shaped outer wall surface. In the first angle range, the arc-shaped outer wall surface of the fan-shaped baffle completely covers the second gas distribution hole 220; in the second angle range, the arc-shaped outer wall surface of the fan-shaped baffle completely covers the first gas distribution hole 210. In this way, the fan-shaped baffle has a simple structure and is easy to manufacture. The method of adjusting the fan-shaped baffle to cover the second gas distribution hole 220 or the first gas distribution hole 210 is simple, which is conducive to simplifying the structure of the premixer 10.

In an embodiment, the adjustment shaft 300 is provided outside the first gas distribution hole 210 and the second gas distribution hole 220, that is, the adjustment shaft 300 will not cover the gas flowing through the first gas distribution hole 210 and/or the second gas distribution hole 220, so that the gas can smoothly flow into the gas-air mixed channel 130 of the premixer body 100 through the first gas distribution hole 210 and/or the second gas distribution hole 220.

With reference to FIGS. 3 to 10, in an embodiment, the gas regulator 400 includes a first gas adjustment part 410 and a second gas adjustment part 420 provided at the adjustment shaft 300. The first gas adjustment part 410 and the second gas adjustment part 420 can rotate synchronously with the adjustment shaft 300. When the adjustment shaft 300 rotates within the first angle range, the first gas adjustment part 410 completely or partially opens the first gas distribution hole 210, and the second gas adjustment part 420 completely covers the second gas distribution hole 220 (as shown in FIGS. 3 to 8). When the adjustment shaft 300 rotates within the second angle range, the first gas adjustment part 410 completely covers the first gas distribution hole 210, and the second gas adjustment part 420 completely or partially opens the first gas distribution hole 210.

The shape and size of the first gas adjustment part 410 and the second gas adjustment part 420 are not limited. The first gas adjustment part 410 adjusts the gas flow area of the first gas distribution hole 210, and the second gas adjustment part 420 adjusts the gas flow area of the second gas distribution hole 220. The first gas adjustment part 410 and the second gas adjustment part 420 rotate synchronously with the adjustment shaft 300, so that the rotation of the adjustment shaft 300 is realized, and the first gas adjustment part 410 and the second gas adjustment part 420 rotate synchronously for switching between two different gases. The method of switching between different gases is simple, which is conducive to simplifying the structure of the premixer 10 and improving the applicability of the premixer 10.

In an embodiment, the first gas adjustment part 410 and the second gas adjustment part 420 are provided along the axial direction of the adjustment shaft 300; along the gas outlet direction of the gas channel 110, the first gas adjustment part 410 is provided upstream of the first gas distribution hole 210, and the second gas adjustment part 420 is provided upstream of the second gas distribution hole 220.

Such arrangement enables the first gas adjustment part 410 and the second gas adjustment part 420 to rotate with the adjustment shaft 300 without affecting each other; the first gas adjustment part 410 will not affect the gas flowing out of the gas outlet end of the first gas distribution hole 210, and the second gas adjustment part 420 will not affect the gas flowing out of the gas outlet end of the second gas distribution hole 220, which is beneficial to improve the smoothness of the gas flowing out of the gas outlet end of the first gas distribution hole 210 or the gas outlet end of the second gas distribution hole 220.

With reference to FIGS. 3 to 12, in an embodiment, the gas distribution member 200 has a gas distribution chamber 230 and a gas inlet hole 240, a first gas distribution hole 210 and a second gas distribution hole 220 respectively communicated with the gas distribution chamber 230. The gas inlet hole 240 is configured to communicate with an external gas source; the first gas adjustment part 410 is rotatably provided in the gas distribution chamber 230 to unblock or block the first gas distribution hole 210; the second gas adjustment part 420 is rotatably provided in the gas distribution chamber 230 to unblock or block the second gas distribution hole 220.

The specific shape of the gas distribution chamber 230 is not limited here, and it is only necessary that the gas regulator 400 can be adapted to the gas distribution chamber 230. External gas can flow into the gas distribution chamber 230 through the gas inlet hole 240. The first gas adjustment part 410 and the second gas adjustment part 420 rotate synchronously with the adjustment shaft 300 in the gas distribution chamber 230 to adjust the gas flow area of the first gas distribution hole 210 or the gas flow area of the second gas distribution hole 220 accordingly. The adjustment method of switching to use different gases in this scheme is simple and easy to implement, which is conducive to simplifying the structure of the premixer 10.

In an embodiment, the first gas distribution hole 210 and the second gas distribution hole 220 are both located at the first side of the gas distribution member 200; the gas inlet hole 240 is located at the second side of the gas distribution member 200, and the first side is adjacent to or opposite to the second side.

It can be understood that the gas inlet hole 240, the first gas distribution hole 210 and the second gas distribution hole 220 are located at different sides of the gas distribution member 200, so that the gas flows in from one side of the gas distribution member 200 and is discharged from the other side of the gas distribution member 200, which is conducive to improving the smoothness of the gas flow.

In an embodiment, the number of the gas inlet holes 240 is one or more. That is to say, the number of gas inlet holes 240 is not limited, and can be set as needed.

In an embodiment, the number of gas inlet holes 240 is multiple, and the areas of any two gas inlet holes 240 are the same, or the areas of at least two gas inlet holes 240 are different. In this way, multiple gas inlet holes 240 are provided at intervals, and the areas of multiple gas inlet holes 240 can be at least partially the same, or at least partially different, which is not specifically limited here.

In an embodiment, the first gas adjustment part 410 and the second gas adjustment part 420 are provided at intervals along the axial direction of the adjustment shaft 300, and along the axial projection of the gas inlet hole 240, the gas inlet hole 240 is at least partially located between the first gas adjustment part 410 and the second gas adjustment part 420.

It can be understood that the first gas adjustment part 410 is provided opposite to the first gas distribution hole 210, and the second gas adjustment part 420 is provided opposite to the second gas distribution hole 220. Along the axial projection of the gas inlet hole 240, the gas inlet hole 240 is at least partially located between the first gas adjustment part 410 and the second gas adjustment part 420, so that the gas flowing from the gas inlet hole 240 into the gas distribution chamber 230 can flow in opposite directions, and selectively flow through the first gas distribution hole 210 or the second gas distribution hole 220 with the rotation of the first gas adjustment part 410 and the second gas adjustment part 420, which is conducive to shortening the sum of the flow paths of the gas flowing from the gas inlet hole 240 and flowing through the first gas distribution hole 210 and the second gas distribution hole 220; that is, the gas inlet hole 240, the first gas distribution hole 210 and the second gas distribution hole 220 are provided compactly on the gas distribution member 200, which is conducive to shortening the flow path of the gas flow in the gas distribution chamber 230 and improving the gas flow speed.

In an embodiment, along the axial direction of the adjustment shaft 300, the gas inlet hole 240 is staggered with the first gas adjustment part 410 and the second gas adjustment part 420. In this way, the first gas adjustment part 410 and the second gas adjustment part 420 will not cover the gas inlet hole 240, and the gas can flow from the gas inlet hole 240 into the gas distribution chamber 230 regardless of whether the first gas adjustment part 410 and the second gas adjustment part 420 rotate, thereby facilitating the gas to flow smoothly into the gas distribution chamber 230.

In an embodiment, along the axial direction of the adjustment shaft 300, the gas inlet hole 240, the first gas distribution hole 210 and the second gas distribution hole 220 are staggered on the gas distribution member 200. In this way, when the first gas distribution hole 210 and the second gas distribution hole 220 rotate in the gas distribution chamber 230, the first gas distribution hole 210 and the second gas distribution hole 220 will not cover the gas inlet hole 240, and the gas inlet hole 240 is in a normally open state, so as to facilitate the gas to flow smoothly into the gas distribution chamber 230.

With reference to FIGS. 10 to 16, in an embodiment, the first gas adjustment part 410 and the adjustment shaft 300 form a first gas supply notch 430, or the first gas adjustment part 410 is provided with a first gas supply notch 430; the second gas adjustment part 420 and the adjustment shaft 300 form a second gas supply notch 440, or the second gas adjustment part 420 is provided with a second gas supply notch 440; when the first gas adjustment part 410 and the second gas adjustment part 420 rotate within the first angle range, the notch of the first gas supply notch 430 at least partially faces the first gas distribution hole 210; the notch of the second gas supply notch 440 is set toward the direction outside the second gas distribution hole 220, and the outer peripheral wall of the second gas adjustment part 420 covers the second gas distribution hole 220; when the first gas adjustment part 410 and the second gas adjustment part 420 rotate within the second angle range, the notch of the first gas supply notch 430 is set toward the direction outside the first gas distribution hole 210, and the outer peripheral wall of the first gas adjustment part 410 covers the first gas distribution hole 210; the notch of the second gas supply notch 440 is at least partially set toward the second gas distribution hole 220.

It can be understood that the specific numerical range of the first angle range and the second angle range is not limited, and the first angle range and the second angle range may partially overlap, or the first angle range and the second angle range have no overlapping range.

The minimum gas flow area required when the first gas is in the minimum load state is S1; for the first gas adjustment part 410, 0 degrees may represent the first gas adjustment part 410 at a preset initial position, which may be the position where the first gas adjustment part 410 adjusts the gas flow area of the first gas distribution hole 210 to S1. As for the specific shape and position of the notch of the first gas supply notch 430, no limitation is made.

As shown in FIGS. 3 to 8, in this embodiment, the first angle range is 0 to 90 degrees, that is, when the first gas adjustment part 410 rotates within the range of 0 to 90 degrees, the notch of the first gas supply notch 430 is at least partially provided toward the first gas distribution hole 210 to open at least part of the first gas distribution hole 210.

As shown in FIGS. 3 to 5, when the first gas adjustment part 410 is at a position of 0 degrees, part of the notch of the first gas supply notch 430 is provided toward the first gas distribution hole 210, so that the first gas adjustment part 410 adjusts the gas flow area of the first gas distribution hole 210 to be equal to the minimum gas flow area S1 required when the first gas is in the minimum load state, and this is the minimum amount of the first gas mixed by the premixer 10.

As shown in FIGS. 6 to 8, when the first gas adjustment part 410 is at a position of 90 degrees, the notch of the first gas supply notch 430 is at least partially provided toward the first gas distribution hole 210, so that the first gas adjustment part 410 adjusts the gas flow area of the first gas distribution hole 210 to the maximum; the first gas adjustment part 410 completely opens the first gas distribution hole 210, and this is the maximum amount of the first gas mixed by the premixer 10.

When the first gas adjustment part 410 is at a position between 0 degrees and 90 degrees, the gas amount of the first gas mixed by the premixer 10 is between the minimum and the maximum. With such a setting, the gas flow area of the first gas distribution hole 210 can be adjusted, that is, the gas amount of the first gas flowing through the first gas distribution hole 210 can be adjusted.

In this embodiment, the first angle range and the second angle range have no overlapping range.

The minimum gas flow area required when the second gas is in the minimum load state is S2; for the second gas adjustment part 420, 180 degrees can represent the second gas adjustment part 420 at a preset initial position. The preset initial position can be the position where the second gas adjustment part 420 adjusts the gas flow area of the second gas distribution hole 220 to S2. As for the specific shape and position of the notch of the second gas supply notch 440, no limitation is made.

In this embodiment, the second angle range is 180 degrees to 270 degrees, that is, when the second gas adjustment part 420 rotates within the range of 180 degrees to 270 degrees, the notch of the second gas supply notch 440 is at least partially provided toward the second gas distribution hole 220 to open at least part of the second gas distribution hole 220.

When the second gas adjustment part 420 is at a position of 180 degrees, part of the notch of the second gas supply notch 440 is provided toward the second gas distribution hole 220, so that the second gas adjustment part 420 adjusts the gas flow area of the second gas distribution hole 220 to be equal to the minimum gas flow area S2 required when the second gas is in the minimum load state, and this is the minimum amount of the second gas mixed by the premixer 10.

When the second gas adjustment part 420 is at a position of 270 degrees, the notch of the second gas supply notch 440 is at least partially provided toward the second gas distribution hole 220, so that the second gas adjustment part 420 adjusts the gas flow area of the second gas distribution hole 220 to the maximum, and the second gas adjustment part 420 completely opens the second gas distribution hole 220, and this is the maximum amount of the second gas mixed by the premixer 10.

When the second gas adjustment part 420 is at a position between 180 degrees and 270 degrees, the gas amount of the second gas mixed by the premixer 10 is between the minimum and the maximum. With such a configuration, the gas flow area of the second gas distribution hole 220 can be adjusted, that is, the gas amount of the second gas flowing through the second gas distribution hole 220 can be adjusted.

With reference to FIGS. 12 to 14, in an embodiment, the first gas adjustment part 410 is provided at a part of the outer peripheral wall of the adjustment shaft 300, and is enclosed with the remaining outer peripheral wall of the adjustment shaft 300 to form a first gas supply notch 430. The first gas supply notch 430 has a first notch 431 and a second notch 432. The first notch 431 opens along the axial direction of the adjustment shaft 300 toward the second gas adjustment part 420 and is communicated with the gas inlet hole 240. The second notch 432 opens outward along the radial direction of the adjustment shaft 300. The second notch 432 is configured to be selectively provided toward the first gas distribution hole 210 as the first gas adjustment part 410 rotates.

It can be understood that the shape and size of the first notch 431 and the second notch 432 are not limited, and can be specifically provided according to the structure and needs of the first gas adjustment part 410. The dotted line frame on the left side of FIG. 14 represents the second notch 432, and the dotted line frame on the right side of FIG. 14 represents the first notch 431. The first notch 431 is communicated with the gas inlet hole 240, so that the gas can flow smoothly into the first gas supply notch 430. The second notch 432 is provided at the outer peripheral wall of the first gas adjustment part 410. When the first gas adjustment part 410 is required to open the first gas distribution hole 210, the second notch 432 is rotated to face the first gas distribution hole 210; when the first gas adjustment part 410 is required to cover the first gas distribution hole 210, the second notch 432 is rotated to face the outside of the first gas distribution hole 210, so that the outer peripheral wall of the first gas adjustment part 410 covers the first gas distribution hole 210, so that the method of adjusting the gas flow area of the first gas distribution hole 210 is simple, which is conducive to simplifying the structure of the premixer 10.

With reference to FIG. 14, in an embodiment, the gas regulator 400 further includes a first gas shielding portion 450. The first gas shielding portion 450 is provided at one end of the first gas supply notch 430 away from the first notch 431 along the axial direction of the adjustment shaft 300. The first notch 431 is located between the first gas shielding portion 450 and the second gas adjustment part 420. The first gas shielding portion 450 is configured to cover one end of the first gas supply notch 430 away from the gas inlet hole 240.

It can be understood that by setting the first gas shielding portion 450, not only can the gas be covered from flowing along the axial direction of the adjustment shaft 300 toward the end away from the first notch 431, so that when the first gas needs to be mixed, the first gas flowing into the first gas supply notch 430 can flow smoothly from the second notch 432 toward the first gas distribution hole 210; and the first gas shielding portion 450 also enriches the integrity of the first gas adjustment part 410, making the first gas adjustment part 410 more complete in the rotation circumferential direction, which is conducive to reducing shaking and increasing the rotation stability of the first gas adjustment part 410.

With reference to FIGS. 15 and 16, in an embodiment, the second gas adjustment part 420 is annularly provided at a part of the outer peripheral wall of the adjustment shaft 300, and is enclosed with the remaining outer peripheral wall of the adjustment shaft 300 to form a second gas supply notch 440. The second gas supply notch 440 has a third notch 441 and a fourth notch 442. The third notch 441 opens along the axial direction of the adjustment shaft 300 toward the first gas adjustment part 410 and is communicated with the gas inlet hole 240. The fourth notch 442 opens along the radial direction of the adjustment shaft 300 in the direction away from the second notch 432. The fourth notch 442 is configured to be selectively provided toward the second gas distribution hole 220 as the second gas adjustment part 420 rotates.

It can be understood that the shape and size of the third notch 441 and the fourth notch 442 are not limited, and can be specifically provided according to the structure and needs of the second gas adjustment part 420. The dotted line frame on the left side of FIG. 16 represents the third notch 441, and the dotted line frame on the right side of FIG. 16 represents the fourth notch 442. The third notch 441 is communicated with the gas inlet hole 240, so that the gas can flow smoothly into the second gas supply notch 440. The fourth notch 442 is provided at the outer peripheral wall of the second gas adjustment part 420. When the second gas adjustment part 420 is required to open the second gas distribution hole 220, the fourth notch 442 is rotated to face the second gas distribution hole 220; when the second gas adjustment part 420 is required to cover the second gas distribution hole 220, the fourth notch 442 is rotated to face the outside of the second gas distribution hole 220, so that the outer peripheral wall of the second gas adjustment part 420 covers the second gas distribution hole 220, so that the method of adjusting the gas flow area of the second gas distribution hole 220 is simple, which is conducive to simplifying the structure of the premixer 10.

In an embodiment, the gas regulator 400 further includes a second gas shielding portion 460, which is provided at one end of the second gas supply notch 440 away from the third notch 441 along the axial direction of the adjustment shaft 300; the third notch 441 is located between the second gas shielding portion 460 and the first gas adjustment part 410, and the second gas shielding portion 460 is configured to cover one end of the second gas supply notch 440 away from the gas inlet hole 240.

It can be understood that by providing the second gas shielding portion 460, not only can the gas be covered from flowing along the axial direction of the adjustment shaft 300 toward the end away from the third notch 441, so that when the second gas needs to be mixed, the second gas flowing into the second gas supply notch 440 can flow smoothly from the fourth notch 442 toward the second gas distribution hole 220; and the second gas shielding portion 460 also enriches the integrity of the second gas adjustment part 420, so that the second gas adjustment part 420 is relatively complete in the rotation circumferential direction, which is conducive to reducing the shaking and increasing the rotation stability of the second gas adjustment part 420.

In an embodiment, the first gas adjustment part 410 is provided with a first gas through hole located between the adjustment shaft 300 and the outer peripheral wall of the first gas adjustment part 410, and the first gas through hole penetrates the opposite sides of the first gas adjustment part 410 along the circumference of the adjustment shaft 300.

It can be understood that the shape, size and number of the first gas through hole are not limited, and the gas only needs to be able to pass through the first gas adjustment part 410 along the first gas through hole. By providing the first gas through hole, it is beneficial to improve the smoothness of the gas flow in the gas distribution chamber 230, that is, it can improve the smoothness of the gas flowing from the gas distribution chamber 230 through the first gas distribution hole 210.

In an embodiment, the second gas adjustment part 420 is provided with a second gas through hole located between the adjustment shaft 300 and the outer peripheral wall of the second gas adjustment part 420, and the second gas through hole penetrates the opposite sides of the second gas adjustment part 420 along the circumference of the adjustment shaft 300.

It is understandable that the shape, size and number of the second gas through hole are not limited, and the gas only needs to be able to pass through the second gas adjustment part 420 along the second gas through hole. By providing the second gas through hole, it is beneficial to improve the smoothness of the gas flow in the gas distribution chamber 230, that is, it can improve the smoothness of the gas flowing from the gas distribution chamber 230 through the second gas distribution hole 220.

With reference to FIGS. 9 to 16, in an embodiment, the chamber wall of the gas distribution chamber 230 at the first gas distribution hole 210 and the second gas distribution hole 220 are both circular in cross section along the radial direction of the adjustment shaft 300; and/or, the first gas adjustment part 410 has a first arc-shaped outer wall surface adapted to the chamber wall of the gas distribution chamber 230; the second gas adjustment part 420 has a second arc-shaped outer wall surface adapted to the chamber wall of the gas distribution chamber 230.

It can be understood that the contour formed by the rotation of the first arc-shaped outer wall surface is circular, and the contour formed by the rotation of the second arc-shaped outer wall surface is also circular. The circular contour can be adapted to the inner chamber wall with a circular cross-section, so that the first gas adjustment part 410 and the second gas adjustment part 420 can be stably rotated in the gas distribution chamber, thereby improving the adaptability of the first gas adjustment part 410 and the second gas adjustment part 420 to the gas distribution chamber.

In an embodiment, the cross-section of the first gas adjustment part 410 along the radial direction of the adjustment shaft 300 is provided in a fan shape. In this way, the first gas adjustment part 410 is easy to form the first gas supply notch 430 with the adjustment shaft 300; the outer peripheral wall of the first gas adjustment part 410 can selectively unblock or block the first gas distribution hole 210 with the rotation of the adjustment shaft 300, and the size of the outer peripheral wall of the first gas adjustment part 410 is adapted to the size of the first gas distribution hole 210.

In an embodiment, the cross-section of the second gas adjustment part 420 along the radial direction of the adjustment shaft 300 is provided in a fan shape. Such a configuration makes it easy for the second gas adjustment part 420 to form the second gas supply notch 440 with the adjustment shaft 300; the outer peripheral wall of the second gas adjustment part 420 can selectively unblock or block the second gas distribution hole 220 as the adjustment shaft 300 rotates, and the size of the outer peripheral wall of the second gas adjustment part 420 is adapted to the size of the second gas distribution hole 220.

In an embodiment, the gas distribution member 200 is provided with a first installation hole 250 communicated with the gas distribution chamber 230, and the first gas adjustment part 410 and the second gas adjustment part 420 are installed in the gas distribution chamber 230 from the first installation hole 250; the opening direction of the first installation hole 250 is toward the axial direction of the adjustment shaft 300. Such a configuration facilitates the smooth installation of the first gas adjustment part 410 and the second gas adjustment part 420 in the gas distribution chamber 230, and there is no need to adjust the position after being installed in the gas distribution chamber 230, thereby improving the compactness of the structure. The shape and position of the first installation hole 250 are not limited, and it is only necessary that the first gas adjustment part 410 and the second gas adjustment part 420 can be smoothly installed in the gas distribution chamber 230.

In an embodiment, the center line of the first installation hole 250 coincides with the axis of the adjustment shaft 300. In this way, after the adjustment shaft 300 is installed in the gas distribution chamber 230 along the center line of the first installation hole 250, the position of the axis of the adjustment shaft 300 remains unchanged, and the gas regulator 400 is provided at the adjustment shaft 300, that is, the size of the gas regulator 400 is adapted to the size of the gas distribution chamber 230, so that the axis position of the adjustment shaft 300 remains unchanged, thereby improving the adaptability of the assembled parts.

With reference to FIGS. 9 to 11, in an embodiment, the gas distribution member 200 has a first side wall 201 and a second side wall 202 opposite to each other, and a third side wall 203 and a fourth side wall 204 located between the first side wall 201 and the second side wall 202 and provided around the rotation circumference of the gas regulator 400. The third side wall 203 and the fourth side wall 204 are adjacent or opposite to each other. The first installation hole 250 is provided at the first side wall 201, and the second side wall 202 is provided with a second installation hole 260 for the adjustment shaft 300 to pass through. The gas inlet hole 240 is provided at the third side wall 203, and the first gas distribution hole 210 and the second gas distribution hole 220 are both provided at the fourth side wall 204 and spaced apart.

It can be understood that the outer surface of the gas distribution member 200 can be square, and of course, it can also be other shapes, which are not limited here. The first installation hole 250 and the second installation hole 260 are on two opposite side walls of the gas distribution member 200, so that the adjustment shaft 300 can be installed from the first installation hole 250 and pass through the second installation hole 260 to improve the installation stability and convenience. The gas inlet hole 240, the first gas distribution hole 210 and the second gas distribution hole 220 are provided at different side walls of the gas distribution member 200, so that the gas flows in from one side of the gas distribution member 200 and is discharged from the other side of the gas distribution member 200, which is conducive to improving the smoothness of the gas flow.

In other embodiments, the gas distribution member 200 can also be provided in a cylindrical shape. In this way, the structure of the gas distribution member 200 is simple and easy to process.

With reference to FIGS. 2 to 5, in an embodiment, the premixer body 100 includes a base 140 and a cover plate 150. The base 140 is provided with a gas channel 110. One side of the base 140 is provided with an installation port connected to the gas channel 110. The gas distribution member 200 is installed in the gas channel 110 from the installation port, and the cover plate 150 can be detachably covered on the installation port; the premixer body 100 includes a regulator 160, and one end of the adjustment shaft 300 passes through the cover plate 150 and is drivingly connected to the regulator 160.

It can be understood that the regulator 160 is a motor, and the motor drives the adjustment shaft 300 to rotate, thereby driving the gas regulator 400 to rotate synchronously. By setting the installation port, it is convenient for the gas distribution member 200 to be installed in the gas channel 110, and the cover plate 150 can limit the gas distribution member 200 to ensure the stability of the gas distribution member 200 installed in the gas channel 110. One end of the adjustment shaft 300 extends outward from the cover plate 150, which is convenient for connection with the motor. It can be seen that the structure of the premixer 10 of the present application is reasonably provided and convenient for assembly and disassembly.

In an embodiment, the premixer 10 also includes a first sealer 600, which is provided between the base 140 and the cover plate 150 to seal the gap between the base 140 and the cover plate 150.

In an embodiment, the adjustment shaft 300 and the gas regulator 400 are an integral structure. In this way, the adjustment shaft 300 and the gas regulator 400 are integrated into a whole, which reduces the assembly and manufacturing costs and improves the stability of the rotation of the gas regulator 400.

In an embodiment, the number of the first gas distribution holes 210 is one or more; the number of the second gas distribution holes 220 is one or more. That is, the number of the first gas distribution holes 210 and the second gas distribution holes 220 is not limited, and can be set according to needs.

In an embodiment, the number of first gas distribution holes 210 is multiple, and the areas of any two first gas distribution holes 210 are the same, or the areas of at least two first gas distribution holes 210 are different; the number of second gas distribution holes 220 is multiple, and the areas of any two second gas distribution holes 220 are the same, or the areas of at least two second gas distribution holes 220 are different. In this way, multiple first gas distribution holes 210 are provided at intervals, and the areas of multiple first gas distribution holes 210 can be at least partially the same, or at least partially different. Multiple second gas distribution holes 220 are provided at intervals, and the areas of multiple second gas distribution holes 220 can be at least partially the same, or at least partially different, which is not specifically limited here.

In an embodiment, the premixer body 100 also has an air channel 120 and a gas-air mixed channel 130 connecting the gas channel 110 and the air channel 120. The premixer body 100 also includes an air regulator 170, which is rotatably provided in the air channel 120. The air regulator 170 is configured to adjust the air flow area of the air channel 120 by rotation to adjust the air amount flowing into the gas-air mixed channel 130.

It can be understood that the air channel 120 is configured for air inflow, and the size and position of the air channel 120 are not limited, and are specifically set as needed. The gas-air mixed channel 130 is configured to premix the air and gas flowing therein, and the size and position of the gas-air mixed channel 130 are not limited, and are specifically set as needed.

The shape of the air regulator 170 is not limited. The air regulator 170 is adapted to the air channel 120. The air regulator 170 can be plate-shaped, cover-shaped, butterfly-shaped, or other shapes. It is only necessary that the air regulator 170 can adjust the air flow area of the air channel 120 by rotating.

In an embodiment, the air regulator 170 can be provided at the adjustment shaft 300, so that the adjustment shaft 300 can drive the air regulator 170 and the gas regulator 400 to rotate synchronously.

In another embodiment, the air regulator 170 and the gas regulator 400 can be driven by a regulator 160 respectively, and the air regulator 170 is provided outside the adjustment shaft 300.

With reference to FIGS. 2 to 10, in an embodiment, the premixer body 100 also has an air channel 120 and a gas-air mixed channel 130 connecting the gas channel 110 and the air channel 120. The premixer body 100 also includes an air regulator 170, which is provided at the adjustment shaft 300 and located in the air channel 120. The air regulator 170 is configured to adjust the air flow area of the air channel 120 with the rotation of the adjustment shaft 300, to adjust the air amount flowing into the gas-air mixed channel 130; the gas regulator 400 is configured to adjust the gas amount flowing into the gas-air mixed channel 130.

It can be understood that, in this solution, the air regulator 170 and the gas regulator 400 are both provided at the adjustment shaft 300, and the adjustment shaft 300 can drive the air regulator 170 and the gas regulator 400 to rotate synchronously. That is, one adjustment shaft 300 drives the air regulator 170 and the gas regulator 400 to rotate synchronously, so that the method of driving the air regulator 170 and the gas regulator 400 to rotate is simple, which is conducive to simplifying the structure of the premixer 10.

In an embodiment, the air regulator 170 includes an air flap, which is provided at the adjustment shaft 300 and can rotate with the rotation of the adjustment shaft 300.

The air flow area of the air channel 120 affects the air amount flowing into the gas-air mixed channel 130, and the gas flow area of the gas channel 110 affects the gas amount flowing into the gas-air mixed channel 130. The mixing ratio of the air amount and the gas amount flowing into the gas-air mixed channel 130 is the air-fuel ratio, which affects the combustion efficiency of the gas. In this solution, the adjustment shaft 300 can drive the air regulator 170 and the gas regulator 400 to rotate synchronously, that is, it can synchronously adjust the air flow area of the air channel 120 and the gas flow area of the gas channel 110. The air flow area of the air channel 120 and the gas flow area of the gas channel 110 can be increased or decreased synchronously. That is to say, the ratio of the air flow area of the air channel 120 and the gas flow area of the gas channel 110 in this solution can always be maintained within a preset range, and the preset range of the ratio is the ratio range of air and gas with a good combustion efficiency of the air-fuel ratio. The technical solution of the present application drives the air regulator 170 and the gas regulator 400 to rotate synchronously through an adjustment shaft 300. Even if the premixer 10 changes under different loads, the air-fuel ratio of the premixer 10 can still be maintained within a good range, so that the gas has a good combustion efficiency. The good range of the air-fuel ratio of the premixer 10 in this solution has been calculated and tested when designing the product, and the finished product of the assembled premixer 10 has a good range to ensure that the combustion efficiency of the gas is high when it is used in gas device.

When the premixer 10 is used in a gas device, the premixed air in the gas-air mixed channel 130 can be discharged outward under the action of the fan. When the speed of the fan is constant, the fan controls the flow speed of air and gas, thereby directly controlling the air amount and the gas amount flowing into the gas-air mixed channel 130; when the speed of the fan changes, the air amount and the gas amount flowing into the gas-air mixed channel 130 are adjusted accordingly.

In an embodiment, the air regulator 170 and the gas regulator 400 are both provided at the adjustment shaft 300, and the air regulator 170 is provided at the air channel 120. The air regulator 170 is configured to adjust the air flow area of the air channel 120 with the rotation of the adjustment shaft 300, to adjust the air amount flowing into the gas-air mixed channel 130; the gas regulator 400 is provided at the gas channel 110, and the gas regulator 400 is configured to adjust the gas flow area of the gas channel 110 with the rotation of the adjustment shaft 300, to adjust the gas amount flowing into the gas-air mixed channel 130. In this way, the air regulator 170 and the gas regulator 400 can rotate synchronously with the rotation of the adjustment shaft 300, so as to be able to synchronously adjust the air flow area of the air channel 120 and the gas flow area of the gas channel 110, so that the air flow area of the air channel 120 and the gas flow area of the gas channel 110 can be increased or decreased at the same time, so that the ratio of the air amount and the gas amount flowing into the gas-air mixed channel 130 under different load conditions can always be within a preset range, that is, the air-fuel ratio of the premixer 10 under different load conditions can always be within a better range, so that the premixer 10 can improve the combustion efficiency of the gas device when applied to the gas device; and an adjustment shaft 300 can drive the air regulator 170 and the gas regulator 400 to rotate synchronously to adjust the mixing ratio of air and gas, thereby simplifying the structure of the premixer 10. It can be seen that the structure of the premixer 10 proposed in this embodiment is simple, and the premixer 10 can ensure that the air-fuel ratio under different load conditions is always within a better range, thereby improving the combustion efficiency of the gas device.

In an embodiment, the rotation axis of the gas regulator 400 coincides with the rotation axis of the air regulator 170, so that the adjustment shaft 300 drives the air regulator 170 and the gas regulator 400 to rotate more smoothly, and the adjustment shaft 300 has high transmission efficiency and simple structure, which is conducive to simplifying the structure of the premixer 10.

The adjustment shaft 300 drives the air regulator 170 and the gas regulator 400 to rotate synchronously. When the gas regulator 400 rotates within the first angle range, the air regulator 170 also rotates within the first angle range. When the air regulator 170 rotates within the first angle range, the size of the gap between the air regulator 170 and the inner wall of the air channel 120 changes, thereby adjusting the air flow area of the air channel 120.

With reference to FIGS. 3 to 8, in this embodiment, the first angle range is 0 degrees to 90 degrees. For the air regulator 170, 0 degrees can indicate that the air regulator 170 is at a preset initial position, and the preset initial position of the air regulator 170 corresponds to the preset initial position of the gas regulator 400. The preset initial position of the gas regulator 400 is the position where the gas regulator 400 adjusts the gas flow area of the first gas distribution hole 210 to S1, and the preset initial position of the air regulator 170 is the position where the air regulator 170 adjusts the air flow area of the air channel 120 to S3. The ratio of the air amount flowing through the air channel 120 when the air flow area is S3 to the gas amount flowing through the gas channel 110 when the gas flow area is S1 is the first air-fuel ratio preset by the premixer 10.

That is, as shown in FIGS. 3 to 5, when the gas regulator 400 is at the position of 0 degrees, this is the minimum amount of the first gas mixed by the premixer 10; when the air regulator 170 is at the position of 0 degrees, this is the minimum air amount mixed by the premixer 10; the minimum amount of the first gas mixed by the premixer 10 and the minimum amount of the air mixed by the premixer 10 are mixed to form the minimum amount of the first premixed gas-air, and the minimum amount of the first premixed gas-air corresponds to the minimum load of the first gas.

As shown in FIGS. 6 to 8, when the air regulator 170 is at a position of 90 degrees, the gap between the air regulator 170 and the inner wall of the air channel 120 is the largest, and this is the maximum air amount mixed by the premixer 10; when the gas regulator 400 is at a position of 90 degrees, the premixer 10 mixes the maximum amount of the first gas; the maximum amount of the first gas mixed by the premixer 10 and the maximum air amount mixed by the premixer 10 are mixed to form the maximum amount of the first premixed gas-air, and the maximum amount of the first premixed gas-air corresponds to the maximum load of the first gas. When the air regulator 170 is at a position between 0 degrees and 90 degrees, the air amount mixed by the premixer 10 is between the minimum and the maximum, so that the air flow area of the air channel 120 can be adjusted.

When the gas regulator 400 rotates within the second angle range, the air regulator 170 also rotates within the second angle range. When the air regulator 170 rotates within the second angle range, the size of the gap between the air regulator 170 and the inner wall of the air channel 120 changes, thereby adjusting the air flow area of the air channel 120.

In this embodiment, the second angle range is 180 degrees to 270 degrees. For the air regulator 170, 180 degrees may indicate that the air regulator 170 is flipped 180 degrees on the basis of 0 degrees in the aforementioned first angle range, that is, it is flipped 180 degrees on the basis of the preset initial position. The preset initial position of the air regulator 170 corresponds to the preset initial position of the gas regulator 400. 270 degrees indicates that the air regulator 170 is flipped 180 degrees on the basis of 90 degrees in the aforementioned first angle range. The position where the gas regulator 400 is flipped 180 degrees from the preset initial position is the position where the gas regulator 400 adjusts the gas flow area of the second gas distribution hole 220 to S2.

When the air regulator 170 is at the position of 180 degrees, the air regulator 170 adjusts the air flow area of the air channel 120 to S3. The ratio of the air amount flowing through the air channel 120 when the air flow area is S3 to the gas amount flowing through the gas channel 110 when the gas flow area is S2 is the second air-fuel ratio preset by the premixer 10. That is to say, when the gas regulator 400 is at the position of 180 degrees, this is the minimum amount of the second gas mixed by the premixer 10; when the air regulator 170 is at the position of 180 degrees, this is the minimum air amount mixed by the premixer 10; the minimum amount of the second gas mixed by the premixer 10 and the minimum air amount mixed by the premixer 10 are mixed to form the minimum amount of the second premixed gas-air, and the minimum amount of the second premixed gas-air corresponds to the minimum load of the second gas.

When the air regulator 170 is at the position of 270 degrees, the gap between the air regulator 170 and the inner wall of the air channel 120 is the largest, and this is the maximum air amount mixed by the premixer 10; when the gas regulator 400 is at the position of 270 degrees, the premixer 10 mixes the maximum amount of the second gas; the maximum amount of the second gas mixed by the premixer 10 and the maximum air amount mixed by the premixer 10 are mixed to form the maximum amount of the second premixed gas-air, and the maximum amount of the second premixed gas-air corresponds to the maximum load of the second gas.

When the air regulator 170 is at a position between 180 degrees and 270 degrees, the air amount mixed by the premixer 10 is between the minimum and maximum, so that the air flow area of the air channel 120 can be adjusted.

In an embodiment, the premixer body 100 includes a base 140, and an installation through hole connecting the air channel 120 and the gas channel 110 is provided in the base 140. The adjustment shaft 300 passes through the gas distribution chamber 230 and extends from the installation through hole into the air channel 120. The air regulator 170 and the gas regulator 400 are provided at both sides of the installation through hole along the axial direction of the adjustment shaft 300.

It can be understood that by setting the installation through hole, it is convenient for the adjustment shaft 300 to pass through the base 140; part of the adjustment shaft 300 extends from the installation through hole into the air channel 120, and part of the adjustment shaft 300 is provided in the gas distribution chamber 230; the air regulator 170 is provided at the adjustment shaft 300 in the air channel 120, and the gas regulator 400 is provided at the adjustment shaft 300 in the gas distribution chamber 230; that is, the air regulator 170 and the gas regulator 400 are provided at both sides of the installation through hole along the axial direction of the adjustment shaft 300, so that one adjustment shaft 300 can drive the air regulator 170 and the gas regulator 400 to rotate synchronously.

The premixer 10 also includes a sealing ring, which is sleeved on the adjustment shaft 300 and located in the installation through hole to seal the gap between the adjustment shaft 300 and the installation through hole.

In an embodiment, the rotation axis of the air regulator 170 intersects with the center line of the air channel 120. Such arrangement makes the distribution of the air regulator 170 in the air channel 120 more uniform, simplifies the design and processing difficulty of the parts, and reduces the complexity of the parts. Among them, the center line of the air channel 120 refers to an imaginary straight line passing through the center position of the air flow in the air channel 120, that is, the geometric center line passing through the air channel 120, which usually indicates the flow direction of the air.

In an embodiment, the air regulator 170 is provided in the air channel 120, so as to avoid the air regulator 170 from exceeding the base 140, which is conducive to the miniaturization of the premixer 10.

As shown in FIGS. 3 to 5, in an embodiment, the air regulator 170 has a first covering position for adjusting the air flow area of the air channel 120 to the minimum. In the first covering position, an air flow gap is formed between the outer wall of the air regulator 170 and the inner wall of the air channel 120. With this arrangement, when the air regulator 170 rotates within any angle range, air can always flow into the gas-air mixed channel 130 from the gap between the air regulator 170 and the inner wall of the air channel 120, which helps to reduce the difficulty of the premixer 10 in adjusting the air intake amount.

As shown in FIGS. 3 to 5, in the first covering position, the area of the air flow gap between the outer wall of the air regulator 170 and the inner wall of the air channel 120 is S3; the minimum air flow area required when the gas is in the minimum load state is S1; the ratio of the air amount flowing through the air flow gap when the area is S3 to the gas amount flowing through the gas channel 110 when the gas flow area is S1 is the air-fuel ratio preset by the premixer 10, and the air-fuel ratio preset by the premixer 10 is the design value; in this way, the size of the area S3 of the air flow gap can be determined. The air regulator 170 in the first covering position is the preset initial position of the air regulator 170 in the aforementioned content, that is, the position of the air regulator 170 at 0 degrees.

In an embodiment, the air regulator 170 includes an air flap, which is rotatably provided in the air channel 120 to unblock or block the air channel 120; the rotation axis of the air flap is perpendicular to the center line of the air channel 120; the virtual plane formed by the rotation axis of the air flap and the center line of the air channel 120 is defined as the first plane; the air flap has a first state and a second state; as shown in FIGS. 3 to 5, in the first state, the air flap is perpendicular to the first plane; as shown in FIGS. 6 to 8, in the second state, the air flap is parallel to the first plane.

It can be understood that the center line of the air channel 120 refers to an imaginary straight line passing through the center position of the air flow in the air channel 120, that is, the geometric center line passing through the air channel 120, which usually indicates the flow direction of the air. The rotation axis of the air flap and the center line of the air channel 120 form a first plane. When the air flap is in the first state, the air flap is perpendicular to the first plane, and the air flow area of the air channel 120 is the smallest, as shown in FIGS. 3 to 5. When the air flap is in the second state, the air flap is parallel to the first plane, and the air flow area of the air channel 120 is the largest, as shown in FIGS. 6 to 8.

When the air flap rotates within the first angle range, in this embodiment, the first angle range is 0 degrees to 90 degrees, and the position of the air flap in the first state is the position of the air flap at 0 degrees, as shown in FIGS. 3 to 5; the position of the air flap in the second state is the position of the air flap at 90 degrees, as shown in FIGS. 6 to 8. Among them, the content of the first angle range of 0 degrees to 90 degrees can be referred to the above, and will not be repeated here.

When the air flap rotates within the second angle range, in this embodiment, the second angle range is 180 degrees to 270 degrees, and the position of the air flap in the first state is the position of the air flap at 180 degrees; the position of the air flap in the second state is the position of the air flap at 270 degrees. Among them, the content of the second angle range of 180 degrees to 270 degrees can be referred to the above, and will not be repeated here.

With reference to FIGS. 4 and 5, in an embodiment, the gas channel 110 includes a gas uniform-flow chamber 111. The gas outlets of the first gas distribution hole 210 and the second gas distribution hole 220 are both communicated with the gas-air mixed channel 130 through the gas uniform-flow chamber 111. The gas uniform-flow chamber 111 is provided with a corner 112 so that the gas flows evenly into the gas-air mixed channel 130.

It can be understood that by providing a corner 112 in the gas uniform-flow chamber 111, the flow direction of the gas in the gas uniform-flow chamber 111 can be changed, thereby adjusting the uniformity of the gas, so that the gas after passing through the corner 112 flows into the gas-air mixed channel 130 in a uniform distribution. As for the angle of the corner 112, it is not limited, for example but not limited to: 60 degrees, 90 degrees, 150 degrees, 180 degrees, etc., which are specifically set according to needs.

In an embodiment, the angle of the corner 112 is 180 degrees, so that the flow direction of the gas flowing out of the corner 112 is opposite to the flow direction of the gas flowing into the corner 112.

In an embodiment, the gas uniform-flow chamber 111 located downstream of the corner 112 is annularly provided, so that the gas flowing out of the corner 112 can be dispersed around the annular gas uniform-flow chamber 111, which is conducive to improving the uniformity of gas distribution.

In an embodiment, the flow direction of air along the air channel 120 is parallel to the flow direction of the gas when it passes through at least one of the first gas distribution hole 210 and the second gas distribution hole 220. In this way, the gas flowing out of the gas outlet of the gas distribution hole changes its flow direction through the corner 112, which improves the uniformity of gas distribution. The uniform gas is then mixed with air in the gas-air mixed channel 130, which is conducive to improving the uniformity of the mixed gas.

In an embodiment, the first gas distribution hole 210 and the second gas distribution hole 220 are provided at the same plate of the gas distribution member 200 and are provided at intervals; a gas injection inlet 530 is formed at the intersection of the gas uniform-flow chamber 111 and the gas-air mixed channel 130; along the axial direction of the adjustment shaft 300, the corner 112 is located between the first gas distribution hole 210 and the gas injection inlet 530; in the flow direction of the gas flowing through the first gas distribution hole 210, the corner 112 and the gas injection inlet 530 are staggered; along the axial projection of the adjustment shaft 300, the gas injection inlet 530 and the first gas distribution hole 210 are located at the same side of the corner 112, so that the flow direction of the gas in a part of the gas channel 110 is opposite to the flow direction of the gas when it passes through the first gas distribution hole 210. This arrangement defines the relative positions of the first gas distribution hole 210, the second gas distribution hole 220, the corner 112 and the gas injection inlet 530. Along the flow direction of the gas in the gas channel 110, the gas first flows through the first gas distribution hole 210 or the second gas distribution hole 220, and then flows through the corner 112 and the gas injection inlet 530 in sequence and flows into the gas-air mixed channel 130. The corner 112 changes the flow direction of the gas in the gas uniform-flow chamber 111, so that the gas can flow evenly through the gas injection inlet 530 and flow into the gas-air mixed channel 130.

With reference to FIGS. 2, 17 and 18, in an embodiment, the premixer 10 further includes a venturi tube 500. The venturi tube 500 has a venturi channel 510 and an air inlet 520, a gas injection inlet 530 and a gas-air-mixture outlet 540 communicated with the venturi channel 510. The venturi tube 500 is provided in the gas-air mixed channel 130. The air inlet 520 is communicated with the air channel 120, and the gas injection inlet 530 is communicated with the gas channel 110. The venturi channel 510 is configured for the air in the air channel 120 to flow into and inject the gas in the gas channel 110, so as to mix the air and the gas. The venturi tube 500 is a pipeline that uses the principle of fluid flow to adjust the flow rate. The velocity and pressure of the fluid are controlled by changing the cross section of the pipeline, thereby realizing the control of the flow speed or flow rate.

In an embodiment, the venturi tube 500 includes a first pipe section 550 and a second pipe section 560. The first pipe section 550 includes a tapered section 551 and a transition section 552 which are sequentially provided along the air outlet direction of the air channel 120. The end of the tapered section 551 away from the transition section 552 has an air inlet 520. The end of the transition section 552 away from the tapered section 551 is inserted into the second pipe section 560. The outer wall of the transition section 552 is spaced apart from the inner wall of the second pipe section 560 to form a gas injection inlet 530. The air flow area of the air inlet 520 is larger than the air flow area of the transition section 552, and the air flow area of the transition section 552 is smaller than the air flow area of the second pipe section 560. In this arrangement, when the air passes through the tapered section 551, the air flow rate is accelerated and the pressure is reduced. The air flow rate in the transition section 552 becomes the fastest and the pressure is reduced to the lowest. Then, the air flows into the second pipe section 560. Since the air flow area of the transition section 552 is smaller than the air flow area of the second pipe section 560, a negative pressure is formed at the gas injection inlet 530 formed by the transition section 552 and the second pipe section 560. Under the action of the negative pressure, the gas is sucked into the second pipe section 560 and mixed with the air to form a mixed gas.

In an embodiment, the gas injection inlet 530 is provided in an annular shape, and the venturi tube 500 further includes a connection portion 570, and the connection portion 570 is at least partially provided in the gas injection inlet 530 and connects the outer wall of the transition section 552 and the inner wall of the second pipe section 560 to separate the gas injection inlet 530.

The first pipe section 550 and the second pipe section 560 are connected by the connection portion 570, which ensures that the outer wall of the transition section 552 and the inner wall of the second pipe section 560 can be spaced to form a gas injection inlet 530, thereby realizing the function of injecting gas; and the connection portion 570 separates the gas injection inlet 530, so that the gas can flow into the second pipe section 560 from different directions, thereby improving the uniformity of the gas flowing into the second pipe section 560.

In an embodiment, the venturi tube 500 includes a plurality of connection portions 570, which are sequentially provided at intervals around the circumference of the transition section 552 to separate the gas injection inlet 530 into a plurality of gas injection inlets. Such a configuration not only improves the stability of the connection between the first pipe section 550 and the second pipe section 560, but also improves the uniformity of the gas flowing into the second pipe section 560, that is, improves the uniformity of the mixed gas.

In an embodiment, the first pipe section 550, the second pipe section 560 and the plurality of connection portions 570 are an integrated structure. In this way, the first pipe section 550, the second pipe section 560 and the plurality of connection portions 570 are integrated into a whole, which reduces the assembly and manufacturing costs and improves the stability of the venturi tube 500.

In an embodiment, the premixer 10 further includes a second sealer 700, which is sleeved on the venturi tube 500 to seal the gap between the venturi tube 500 and the inner wall of the gas-air mixed channel 130 at the outlet of the gas-air mixed channel 130.

In an embodiment of the present application, the premixer 10 includes a premixer body 100, a gas distribution member 200, an adjustment shaft 300 and a gas regulator 400. The premixer body 100 has a gas channel 110; the gas distribution member 200 is at least partially provided in the gas channel 110, and the gas distribution member 200 is provided with a first gas distribution hole 210 and a second gas distribution hole 220 which are respectively communicated with the gas channel 110; the figure formed by the first gas distribution hole 210 and the figure formed by the second gas distribution hole 220 are non-congruent figures; the adjustment shaft 300 is at least partially rotatably provided in the gas channel 110; the gas regulator 400 is provided at the adjustment shaft 300 and is located in the gas channel 110. The gas regulator 400 can rotate synchronously with the adjustment shaft 300. The gas regulator 400 is capable of rotating to selectively completely or partially open one of the first gas distribution hole 210 and the second gas distribution hole 220, and completely cover the other of the first gas distribution hole 210 and the second gas distribution hole 220, so as to adjust the gas flow area of the first gas distribution hole 210 or the second gas distribution hole 220, and adjust the gas amount flowing through the first gas distribution hole 210 or the gas amount flowing through the second gas distribution hole 220. When the gas regulator 400 rotates within the first angle range, the gas regulator 400 completely or partially opens the first gas distribution hole 210 and completely covers the second gas distribution hole 220; when the gas regulator 400 rotates within the second angle range, the gas regulator 400 completely or partially opens the second gas distribution hole 220 and completely covers the first gas distribution hole 210. The gas regulator 400 includes a first gas adjustment part 410 and a second gas adjustment part 420 provided at the adjustment shaft 300, and the first gas adjustment part 410 and the second gas adjustment part 420 can rotate synchronously with the adjustment shaft 300; when the adjustment shaft 300 rotates within a first angle range, the first gas adjustment part 410 completely or partially opens the first gas distribution hole 210, and the second gas adjustment part 420 completely covers the second gas distribution hole 220; when the adjustment shaft 300 rotates within a second angle range, the first gas adjustment part 410 completely covers the first gas distribution hole 210, and the second gas adjustment part 420 completely or partially opens the first gas distribution hole 210. The gas distribution member 200 has a gas distribution chamber 230 and a gas inlet hole 240, a first gas distribution hole 210 and a second gas distribution hole 220 respectively communicated with the gas distribution chamber 230, and the gas inlet hole 240 is configured to communicate with an external gas source; the first gas adjustment part 410 is rotatably provided in the gas distribution chamber 230 to unblock or block the first gas distribution hole 210; the second gas adjustment part 420 is rotatably provided in the gas distribution chamber 230 to unblock or block the second gas distribution hole 220. The first gas adjustment part 410 and the adjustment shaft 300 form a first gas supply notch 430, or the first gas adjustment part 410 is provided with the first gas supply notch 430; the second gas adjustment part 420 and the adjustment shaft 300 form a second gas supply notch 440, or the second gas adjustment part 420 is provided with the second gas supply notch 440; when the first gas adjustment part 410 and the second gas adjustment part 420 rotate within the first angle range, the notch of the first gas supply notch 430 is at least partially provided toward the first gas distribution hole 210; the notch of the second gas supply notch 440 is provided toward the direction outside the second gas distribution hole 220, and the outer peripheral wall of the second gas adjustment part 420 covers the second gas distribution hole 220; when the first gas adjustment part 410 and the second gas adjustment part 420 rotate within the second angle range, the notch of the first gas supply notch 430 is set toward the direction outside the first gas distribution hole 210, and the outer peripheral wall of the first gas adjustment part 410 covers the first gas distribution hole 210; the notch of the second gas supply notch 440 is at least partially set toward the second gas distribution hole 220. The first gas adjustment part 410 is provided at a portion of the outer peripheral wall of the adjustment shaft 300, and is surrounded by the remaining outer peripheral wall of the adjustment shaft 300 to form a first gas supply notch 430. The first gas supply notch 430 has a first notch 431 and a second notch 432. The first notch 431 opens along the axial direction of the adjustment shaft 300 toward the second gas adjustment part 420 and is connected to the gas inlet hole 240. The second notch 432 opens radially outwardly along the adjustment shaft 300. The second notch 432 is configured to be selectively provided toward the first gas distribution hole 210 as the first gas adjustment part 410 rotates. The second gas adjustment part 420 is provided at a portion of the outer peripheral wall of the adjustment shaft 300, and is surrounded by the remaining outer peripheral wall of the adjustment shaft 300 to form a second gas supply notch 440. The second gas supply notch 440 has a third notch 441 and a fourth notch 442. The third notch 441 opens along the axial direction of the adjustment shaft 300 toward the first gas adjustment part 410 and is communicated with the gas inlet hole 240. The fourth notch 442 opens along the radial direction of the adjustment shaft 300 in the direction away from the second notch 432. The fourth notch 442 is configured to be selectively provided toward the second gas distribution hole 220 as the second gas adjustment part 420 rotates. The cross-section of the chamber wall of the gas distribution chamber 230 at the first gas distribution hole 210 and the second gas distribution hole 220 along the radial direction of the adjustment shaft 300 is circular; the first gas adjustment part 410 has a first arc-shaped outer wall surface adapted to the chamber wall of the gas distribution chamber 230; the second gas adjustment part 420 has a second arc-shaped outer wall surface adapted to the chamber wall of the gas distribution chamber 230. The cross-section of the first gas adjustment part 410 along the radial direction of the adjustment shaft 300 is fan-shaped, and the cross-section of the second gas adjustment part 420 along the radial direction of the adjustment shaft 300 is fan-shaped.

The premixer body 100 also has an air channel 120 and a gas-air mixed channel 130 connecting the gas channel 110 and the air channel 120. The premixer body 100 also includes an air regulator 170, which is provided at the adjustment shaft 300 and located in the air channel 120. The air regulator 170 is configured to adjust the air flow area of the air channel 120 with the rotation of the adjustment shaft 300 to adjust the air amount flowing into the gas-air mixed channel 130. The gas regulator 400 is configured to adjust the gas amount flowing into the gas-air mixed channel 130. The gas channel 110 includes a gas uniform-flow chamber 111, and the gas outlet ends of the first gas distribution hole 210 and the second gas distribution hole 220 are both communicated with the gas-air mixed channel 130 through the gas uniform-flow chamber 111. The gas uniform-flow chamber 111 is provided with a corner 112 to allow the gas to flow uniformly into the gas-air mixed channel 130. The premixer 10 also includes a venturi tube 500, which has a venturi channel 510 and an air inlet 520, a gas injection inlet 530 and a gas-air-mixture outlet 540 communicated with the venturi channel 510. The venturi tube 500 is provided in the gas-air mixed channel 130; the air inlet 520 is communicated with the air channel 120, and the gas injection inlet 530 is communicated with the gas channel 110. The venturi channel 510 is configured for the air in the air channel 120 to flow into and inject the gas in the gas channel 110, so that the air and the gas are mixed.

The present application also proposes a premixer 10, which includes a premixer body 100, an adjustment shaft 300, and a gas regulator 400. The premixer body 100 has a gas channel 110 and a gas distribution chamber 230 provided in the gas channel 110. The inner wall of the gas distribution chamber 230 is cylindrical, and a first gas distribution hole 210, a second gas distribution hole 220, and a gas inlet hole 240 are opened on the side wall of the gas distribution chamber 230. The figure formed by the first gas distribution hole 210 and the figure formed by the second gas distribution hole 220 are non-congruent figures; the adjustment shaft 300 is rotatably provided in the gas distribution chamber 230. The gas regulator 400 is provided at part of the outer peripheral wall of the adjustment shaft 300, and the gas regulator 400 has an arc-shaped outer wall surface adapted to the inner wall of the gas distribution chamber 230; the gas regulator 400 is provided outside the gas inlet hole 240 to make the gas inlet hole 240 in a normally open state; when the gas regulator 400 rotates within the first angle range, the gas regulator 400 completely or partially opens the first gas distribution hole 210 and completely covers the second gas distribution hole 220; when the gas regulator 400 rotates within the second angle range, the gas regulator 400 completely or partially opens the second gas distribution hole 220 and completely covers the first gas distribution hole 210.

Among them, the beneficial effects of the specific technical features of the premixer 10 in this scheme can refer to the beneficial effects of the corresponding technical features of the premixer 10 in the aforementioned embodiment, and will not be repeated here.

In an embodiment, the number of gas regulators 400 is one, and the first gas distribution hole 210 and the second gas distribution hole 220 are distributed at intervals around the circumference of the adjustment shaft 300 on the side wall of the gas distribution chamber 230. In this way, the premixer 10 is only provided with one gas regulator 400, and the switching use of two different gases can be realized to meet the use needs of different gas sources in different regions. The premixer 10 of the present application has good applicability and can be widely used.

In an embodiment, the gas regulator 400 is a fan-shaped baffle sheet or a fan-shaped baffle block. Among them, the provision of a fan-shaped baffle sheet or a fan-shaped baffle block is conducive to simplifying the structure of the parts and reducing the difficulty of manufacturing.

In an embodiment, the gas regulator 400 includes a first gas adjustment part 410 and a second gas adjustment part 420 provided at intervals along the axial direction of the adjustment shaft 300, and the first gas distribution hole 210 and the second gas distribution hole 220 are provided at intervals along the axial direction of the adjustment shaft 300 on the side wall of the gas distribution chamber 230; when the adjustment shaft 300 rotates within a first angle range, the first gas adjustment part 410 completely or partially opens the first gas distribution hole 210, and the second gas adjustment part 420 completely covers the second gas distribution hole 220; when the adjustment shaft 300 rotates within a second angle range, the first gas adjustment part 410 completely covers the first gas distribution hole 210, and the second gas adjustment part 420 completely or partially opens the first gas distribution hole 210.

It can be understood that when the adjustment shaft 300 rotates within the first angle range, the first gas adjustment part 410 adjusts the gas flow area of the first gas distribution hole 210 to adjust the gas amount of the first gas flowing through the first gas distribution hole 210. At this time, the second gas adjustment part 420 completely covers the second gas distribution hole 220, so that the first gas cannot flow along the second gas distribution hole 220.

When the adjustment shaft 300 rotates within the second angle range, the second gas adjustment part 420 adjusts the gas flow area of the second gas distribution hole 220 to adjust the gas amount of the second gas flowing through the second gas distribution hole 220. At this time, the first gas adjustment part 410 completely covers the first gas distribution hole 210, so that the second gas cannot flow along the first gas distribution hole 210. It can be seen that, in this solution, the first gas adjustment part 410 and the second gas adjustment part 420 are driven to rotate synchronously through the adjustment shaft 300, so that the premixer 10 realizes the switching use of two different gases to meet the use needs of different gas sources in different regions, and the premixer 10 has good applicability.

The present application also proposes a gas device, which includes the premixer 10 as described above. The specific structure of the premixer 10 refers to the above embodiment. Since the gas device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

In this embodiment, the gas device can be a gas water heater, a wall-mounted boiler, a gas stove and other device. The gas device can also include a burner and a fan. After the air and gas are mixed into premixed gas-air in the premixer 10, the premixed air enters the burner under the action of the fan and flows out of the burner through the fire hole of the burner to achieve ignition and combustion. Among them, under the regulation of the premixer 10, the combustion efficiency of the gas device can be improved.

The above description is only some exemplary embodiments of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application and the drawings under the technical conception of the present application, or directly/indirectly applied in other related technical fields, are included in the patent protection scope of the present application.