PREMIXER AND GAS DEVICE

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese Patent Application No. 202411999397.X, filed on Dec. 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 devices such as gas water heaters, wall-mounted boilers and gas stoves usually adopt a fully premixed combustion method. Full premixed combustion refers to the process in which air and gas are fully 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 of the fully 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 complex structure. When adjusted to different load states, it is difficult to maintain a good air-fuel ratio, resulting in low combustion efficiency of the gas device.

SUMMARY

The main purpose of the present application is to propose a premixer and a gas device, the premixer has a simple structure and can improve the combustion efficiency of the gas device.

To achieve at least the above purpose, the premixer proposed by embodiments of the present application includes:

• • a base provided with an air channel, a gas channel and a gas-air mixed channel; the gas-air mixed channel communicates with the air channel and the gas channel; and
  • a regulate assembly including an adjustment shaft, an air regulator provided at the adjustment shaft and a gas regulator provided at the adjustment shaft; the adjustment shaft is rotatably provided at the base;
  • the air regulator is provided at the air channel, and configured to adjust air flow area of the air channel as the adjustment shaft rotates to adjust amount of air flowing into the gas-air mixed channel;
  • the gas regulator is provided at the gas channel, and configured to adjust gas flow area of the gas channel as the adjustment shaft rotates to adjust amount of gas flowing into the gas-air mixed channel.

The present application further proposes some embodiments concerning a premixer, the premixer including a base, a regulate assembly and a gas distribution member. The base is provided with an air channel, a gas channel and a gas-air mixed channel; the gas-air mixed channel communicates with the air channel and the gas channel. The regulate assembly includes an adjustment shaft, an air flap provided at the adjustment shaft and a gas regulator provided at the adjustment shaft. The adjustment shaft is rotatably provided at the base; the air flap is provided at the air channel, and the air flap is configured to adjust air flow area of the air channel as the adjustment shaft rotates to adjust amount of air flowing into the gas-air mixed channel. The gas distribution member is at least partially provided in the gas channel. The gas distribution member is provided with a gas distribution chamber, a gas inlet hole communicating with the gas distribution chamber, and a gas distribution hole communicating with the gas distribution chamber, and the gas inlet hole communicates with an external gas source; the gas channel includes a gas homogenizing flow chamber, the gas homogenizing flow chamber communicates with a gas outlet end of the gas distribution hole and the gas-air mixed channel, and the gas homogenizing flow chamber is provided with a corner to cause the gas flow uniformly into the gas-air mixed channel. The gas regulator is rotatably provided in the gas distribution chamber, and a rotation axis of the gas regulator is configured to coincide with a rotation axis of the air regulator; an inner cavity wall of the gas distribution chamber at the gas distribution hole is circular in cross section along a radial direction of the adjustment shaft, and the gas regulator is provided with an arc-shaped outer wall surface adapted to a cavity wall of the gas distribution chamber; the gas regulator and the adjustment shaft are configured to form a gas supply notch, or the gas regulator is provided with a gas supply notch. When the gas regulator rotates within a first angle range, a notch of the gas supply notch is at least partially provided toward the gas distribution hole to unblock the gas distribution hole. When the gas regulator rotates within a second angle range, the notch of the gas supply notch is provided toward a direction outside the gas distribution hole, and an outer peripheral wall of the gas regulator is configured to block the gas distribution hole.

The present application further proposes a gas device, the gas device including the premixer as described above.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the embodiments of the present application or the technical solutions in the existing technology more clearly, the accompanying drawings needed to be used in the description of the embodiments or the existing technology will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, other accompanying drawings can be obtained based on the provided accompanying drawings without exerting creative efforts for those skilled in the art.

FIG. 1 is a structural schematic view of a premixer provided by an embodiment of the present application.

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

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

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

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

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

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

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

FIG. 9 is a partial structural schematic view of a premixer of an embodiment of the present application.

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

FIG. 11 is a partial structural schematic view of a premixer of another embodiment of the present application.

FIG. 12 is an exploded schematic view of the structure in FIG. 11.

FIG. 13 is a partial structural schematic view of a premixer of an embodiment of the present application.

FIG. 14 is a structural schematic view of the structure in FIG. 13 from another perspective.

FIG. 15 is a schematic view of a second notch in FIG. 14.

FIG. 16 is a partial structural schematic view of a premixer of another embodiment of the present application.

FIG. 17 is a schematic view of a first notch and a second notch in FIG. 16.

FIG. 18 is a structural schematic view of a venturi tube in FIG. 2.

FIG. 19 is a cross-sectional view of the structure in FIG. 18.

EXPLANATION OF REFERENCE NUMBERS

• • 10. premixer;
  • 100. base; 110. air channel; 120. gas channel; 121. gas homogenizing flow chamber; 122. corner; 130. gas-air mixed channel; 140. installation through hole; 150. base body; 151. installation port; 160. cover plate;
  • 200. regulator assembly; 210. adjustment shaft; 220. air regulator; 221. air flap; 230. gas regulator; 231. gas supply groove; 232. first notch; 233. second notch; 234. gas shield; 235. gas through hole; 240, regulator;
  • 300, gas distribution member; 310, gas distribution hole; 320, gas distribution chamber; 330, gas inlet hole; 340, first installation hole; 350, second installation hole; 360, first side wall; 370, second side wall; 380, third side wall; 390, fourth side wall;
  • 400, venturi tube; 410, venturi channel; 420, air inlet; 430, gas injection inlet; 440, gas-air mixed outlet; 450, first pipe section; 451, tapered section; 452, transition section; 460, second pipe section; 470, connection portion;
  • 500, first sealer;
  • 600, second sealer.

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

DETAILED DESCRIPTION OF EMBODIMENTS

The technical solutions in the embodiments according to the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments according to the present application, and it is clear that the described embodiments are only a part of the embodiments according to the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative labor fall within the scope of the present application.

It should be noted that if there are directional instructions (such as up, down, left, right, front, back or the like) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship, movement and so on between various components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving “first”, “second” or the like, the descriptions of “first”, “second” or the like are only for descriptive purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity of the technical features indicated. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features. In addition, the meaning of “and/or” appearing in the entire text includes three parallel solutions, taking “A and/or B” as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions of various embodiments can be combined with each other, but it is based on that those skilled in the art can realize. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by the present application.

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

Premixer is an important component of the fully 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 structure of the existing premixer is complex. When adjusted to different load states, it is difficult to maintain a good air-fuel ratio, resulting in low combustion efficiency of the gas device.

Based on this, the present application proposes a premixer and a gas device including the premixer. The premixer has a simple structure and can improve the combustion efficiency of the gas device. The premixer can be applied to gas devices such as gas water heaters, wall-mounted boilers, gas stoves, etc. The gas device may further include a burner and a fan. After the air and gas are mixed into the premixed gas-air in the premixer, the premixed air enters the burner under the action of the fan and flows out of the burner via 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 embodiments.

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-dotted arrow indicates the flow direction of the mixed gas-air after the air and gas are mixed.

Referring to FIG. 1 to FIG. 8, in an embodiment of the present application, a premixer 10 includes a base 100 and a regulate assembly 200. The base 100 is provided with an air channel 110, a gas channel 120 and a gas-air mixed channel 130. The gas-air mixed channel 130 communicates with the air channel 110 and the gas channel 120. The regulate assembly 200 including an adjustment shaft 210, an air regulator 220 provided at the adjustment shaft 210 and a gas regulator 230 provided at the adjustment shaft 210; the adjustment shaft 210 is rotatably provided at the base 100. The air regulator 220 is provided at the air channel 110, and configured to adjust air flow area of the air channel 110 as the adjustment shaft 210 rotates to adjust amount of air flowing into the gas-air mixed channel 130. The gas regulator 230 is provided at the gas channel 120, and configured to adjust gas flow area of the gas channel 120 as the adjustment shaft 210 rotates to adjust amount of gas flowing into the gas-air mixed channel 130.

It can be understood that the air channel 110 is used for air to flow in, and the size and location of the air channel 110 are not limited, and are set according to specific needs. The gas channel 120 is used for gas to flow in, and the type of gas is not limited, such as but not limited to: natural gas, liquefied petroleum gas, etc. The size and location of the gas channel 120 are not limited, and are set according to specific needs. The gas-air mixed channel 130 is used to premix the air and the gas flowing therein. The size and position of the gas-air mixed channel 130 are not limited and can be set according to specific needs.

The adjustment shaft 210 is passed through the base 100, part of the adjustment shaft 210 is provided in the air channel 110, part of the adjustment shaft 210 is provided in the gas channel 120, the air regulator 220 is provided at the adjustment shaft 210 in the air channel 110, and the gas regulator 230 is provided on the adjustment shaft 210 in the gas channel 120, so that the adjustment shaft 210 can drive the air regulator 220 and the gas regulator 230 to rotate synchronously. The adjustment shaft 210 can be in a drive connection with the regulator 240, and the adjustment shaft 210 is driven to rotate by the regulator 240. The regulator 240 can be a motor. That is, one adjustment shaft 210 drives the air regulator 220 and the gas regulator 230 to rotate synchronously, so that the method of driving the air regulator 220 and the gas regulator 230 to rotate is simple, which is conducive to simplifying the structure of the premixer 10.

The shape of the air regulator 220 is not limited. The air regulator 220 is adapted to the air channel 110. The air regulator 220 can be plate-shaped, block-shaped, butterfly-shaped, or other shapes, as long as the air regulator 220 can adjust the air flow area of the air channel 110 by rotating.

The shape of the gas regulator 230 is not limited. The gas regulator 230 is adapted to the gas channel 120. The gas regulator 230 can be plate-shaped, block-shaped, butterfly-shaped, or other shapes, as long as the gas regulator 230 can adjust the gas flow area of the gas channel 120 by rotating.

It can be understood that the air flow area of the air channel 110 affects the amount of air flowing into the gas-air mixed channel 130, and the gas flow area of the gas channel 120 affects the amount of gas flowing into the gas-air mixed channel 130. The mixing ratio of the amount of air and the amount of gas flowing into the gas-air mixed channel 130 is the air-fuel ratio, and the air-fuel ratio affects the combustion efficiency of the gas. In this solution, the adjustment shaft 210 can drive the air regulator 220 and the gas regulator 230 to rotate synchronously, that is, it can synchronously adjust the air flow area of the air channel 110 and the gas flow area of the gas channel 120, and the air flow area of the air channel 110 and the gas flow area of the gas channel 120 can be increased synchronously or decreased synchronously. In other words, the ratio of the air flow area of the air channel 110 and the gas flow area of the gas channel 120 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 air-fuel ratio and good combustion efficiency. The technical solution of the present application drives the air regulator 220 and the gas regulator 230 to rotate synchronously by one adjustment shaft 210. 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 the present solution has been calculated and tested when designing the product, and the finished product of the premixer 10 after assembly has a good range, so as to ensure that the gas has high combustion efficiency when used in a gas device.

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

In the technical solution of the present application, an air regulator 220 and a gas regulator 230 are both provided at an adjustment shaft 210, the air regulator 220 is provided at an air channel 110, and the air regulator 220 is configured to adjust the air flow area of the air channel 110 along with rotation of the adjustment shaft 210, so as to adjust the amount of air flowing into the gas-air mixed channel 130; the gas regulator 230 is provided at the gas channel 120, and the gas regulator 230 is configured to adjust the gas flow area of the gas channel 120 along with rotation of the adjustment shaft 210, so as to adjust the amount of gas flowing into the gas-air mixed channel 130. In this way, the air regulator 220 and the gas regulator 230 can rotate synchronously with the rotation of the adjustment shaft 210, so as to synchronously adjust the air flow area of the air channel 110 and the gas flow area of gas channel 120, so that the air flow area of air channel 110 and the gas flow area of gas channel 120 can be increased simultaneously or decreased simultaneously, thus realizing that the ratio of the amount of air and the amount of gas flowing into the gas-air mixed channel 130 under different load conditions can always be within a preset range, that is, realizing that the air-fuel ratio of the premixer 10 under different load conditions can always be within a better range, so that the combustion efficiency of the gas device can be improved when the premixer 10 is applied to the gas device. Moreover, one adjustment shaft 210 can drive the air regulator 220 and the gas regulator 230 to rotate synchronously to adjust the gas-air mixed 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 the present application 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.

Referring to FIG. 2 to FIG. 12, in an embodiment, the premixer 10 further includes a gas distribution member 300, the gas distribution member 300 is at least partially provided in the gas channel 120, and provided with a gas distribution hole 310 communicating with the gas channel 120, the adjustment shaft 210 is external to the gas distribution hole 310, and the gas regulator 230 is rotatable with respect to the gas distribution member 300 to unblock or block the gas distribution hole 310 and adjust the gas flow area of the gas distribution hole 310.

It is understandable that the shape of the gas distribution member 300 is not limited, and can be plate-shaped, cylindrical or some other shapes. The gas distribution member 300 and the base 100 can be separated, or the gas distribution member 300 and the base 100 are an integral structure. One or more gas distribution holes 310 are provided. When a plurality of gas distribution holes 310 are provided, the area size of the gas distribution holes 310 is not limited, for example, areas of any two of the gas distribution holes 310 are equal, or areas of at least two of the gas distribution holes 310 are different, and the specific setting can be made as needed. The gas distribution member 300 is used to distribute the gas flowing into the gas channel 120, so that the gas can only flow out of the gas distribution hole 310 and then flow into the gas-air mixed channel 130.

The adjustment shaft 210 is external to the gas distribution hole 310, that is, the adjustment shaft 210 will not block the gas flowing through the gas distribution hole 310, so that the gas can smoothly flow into the gas-air mixed channel 130 via the gas distribution hole 310. Along the gas outlet direction of the gas channel 120, the relative position of the gas distribution hole 310 and the gas regulator 230 is not limited. For example, the gas distribution hole 310 can be provided downstream of the gas regulator 230, or the gas distribution hole 310 can be provided upstream of the gas regulator 230, as long as the gas regulator 230 can adjust the gas flow area of the gas distribution hole 310 by rotating. This solution facilitates the gas regulator 230 to adjust the amount of gas flowing into the gas-air mixed channel 130 by setting a gas distribution hole 310 at the gas distribution member 300.

In an embodiment, the gas distribution hole 310 is provided downstream of the gas regulator 230 along a gas outlet direction of the gas channel 120. Such an arrangement makes it possible for the gas regulator 230 to not affect the gas flowing out of the gas outlet end of the gas distribution hole 310, which is conducive to improving the smoothness of the gas flowing out of the gas outlet end of the gas distribution hole 310.

In an embodiment, one or more gas distribution holes 310 are provided, that is, the number of the gas distribution holes 310 is not limited and can be set according to needs.

Referring to the embodiments of FIG. 2 to FIG. 12, the gas distribution member 300 is provided with a gas distribution chamber 320, a gas inlet hole 330 communicating with the gas distribution chamber 320, and the gas distribution hole 310 communicating with the gas distribution chamber 320; the gas inlet hole 330 communicates with an external gas source, the gas regulator 230 is rotatably mounted in the gas distribution chamber 320 to unblock or block the gas distribution hole 310, and a rotation axis of the gas regulator 230 is configured to coincide with a rotation axis of the air regulator 220.

It can be understood that the specific shape of the gas distribution chamber 320 is not limited here, as long as the gas regulator 230 can adapt to the gas distribution chamber 320. The external gas can flow into the gas distribution chamber 320 via the gas inlet hole 330. The gas distribution hole 310 can be unblocked or blocked by rotating the gas regulator 230. When the gas regulator 230 unblocks the gas distribution hole 310, the external gas can flow through the gas inlet hole 330, the gas distribution chamber 320 and the gas distribution hole 310 in sequence and then flow into the gas-air mixed channel 130.

When the gas regulator 230 blocks the gas distribution hole 310, the gas regulator 230 is in close contact with the inner wall of the gas distribution chamber 320 at the gas distribution hole 310 or has a small gap therebetween, so that the gas in the gas distribution chamber 320 cannot flow out of the gas distribution hole 310. It should be noted that when there is a small gap between the gas regulator 230 and the inner wall of the gas distribution chamber 320 at the gas distribution hole 310, the small gap is for the gas regulator 230 to rotate in the gas distribution chamber 320, and the amount of gas flowing out of the small gap is very small or can be ignored.

The rotation axis of the gas regulator 230 coincides with the rotation axis of the air regulator 220, so that the adjustment shaft 210 drives the air regulator 220 and the gas regulator 230 to rotate more smoothly, and the adjustment shaft 210 has high transmission efficiency and simple structure, which is conducive to simplifying the structure of the premixer 10.

In an embodiment, an installation through hole 140 communicating with the air channel 110 and the gas channel 120 is provided in the base 100, the adjustment shaft 210 is configured to pass through the gas distribution chamber 320 and extend from the installation through hole 140 into the air channel 110, and the air regulator 220 and the gas regulator 230 are provided at both sides of the installation through hole 140 along an axial direction of the adjustment shaft 210.

It can be understood that by setting the installation through hole 140, the adjustment shaft 210 is conveniently installed at the base 100, part of the adjustment shaft 210 extends from the installation through hole 140 into the air channel 110, the adjustment shaft 210 is partially provided in the gas distribution chamber 320, the air regulator 220 is provided at the adjustment shaft 210 in the air channel 110, and the gas regulator 230 is provided at the adjustment shaft 210 in the gas distribution chamber 320, that is, the air regulator 220 and the gas regulator 230 are provided at both sides of the installation through hole 140 along the axial direction of the adjustment shaft 210, so that one adjustment shaft 210 can drive the air regulator 220 and the gas regulator 230 to rotate synchronously.

The premixer 10 further includes a seal ring, and the seal ring is sleeved at the adjustment shaft 210 and located in the installation through hole 140 to seal a gap between the adjustment shaft 210 and the installation through hole 140.

In an embodiment, the gas inlet hole 330 and the gas regulator 230 are staggered along an axial direction of the adjustment shaft 210. In this way, the gas regulator 230 will not cover the gas inlet hole 330, and the gas can flow from the gas inlet hole 330 into the gas distribution chamber 320 regardless of whether the gas regulator 230 rotates, so that when the gas regulator 230 unblocks the gas distribution hole 310, the gas can flow smoothly through the gas inlet hole 330, the gas distribution chamber 320 and the gas distribution hole 310 and then flow into the gas-air mixed channel 130.

In an embodiment, the gas inlet hole 330 and the gas distribution hole 310 are staggered at the gas distribution member 300 along the axial direction of the adjustment shaft 210. In this way, when the gas regulator 230 rotates in the gas distribution chamber 320, the gas regulator 230 can only unblock or block the gas distribution hole 310, and the gas regulator 230 will not cover the gas inlet hole 330, and the gas inlet hole 330 is in a normally open state, so that the gas can flow smoothly into the gas distribution chamber 320.

Referring to FIG. 9 to FIG. 12, in an embodiment, a first installation hole 340 communicating with the gas distribution chamber 320 is provided at the gas distribution member 300, and the gas regulator 230 is mounted in the gas distribution chamber 320 from the first installation hole 340.

It can be understood that by providing the first installation hole 340 at the gas distribution member 300, the gas regulator 230 can be smoothly installed in the gas distribution chamber 320. The shape and position of the first installation hole 340 are not limited, as long as the gas regulator 230 can smoothly install in the gas distribution chamber 320.

In an embodiment, along an axial direction of the adjustment shaft 210, the gas distribution member 300 is provided with a first side wall 360 distant from the air regulator 220 and a second side wall 370 adjacent to the air regulator 220, and the first installation hole 340 is provided at the first side wall 360 or the second side wall 370. Such a configuration enables the gas regulator 230 to be installed in the gas distribution chamber 320 from the first side wall 360 or the second side wall 370, and the gas regulator 230 is provided at the adjustment shaft 210, so that the adjustment shaft 210 is conveniently passed through the base 100.

In an embodiment, a center line of the first installation hole 340 is configured to coincide with an axis of the adjustment shaft 210. In this way, after the adjustment shaft 210 is installed in the gas distribution chamber 320 along the center line of the first installation hole 340, the position of the axis of the adjustment shaft 210 remains unchanged, and the gas regulator 230 is provided at the adjustment shaft 210, that is, the size of the gas regulator 230 is adapted to the size of the gas distribution chamber 320, so that the axis position of the adjustment shaft 210 remains unchanged, thereby improving the adaptability of the assembly member.

Referring to FIG. 9 to FIG. 12, in an embodiment, the gas distribution member 300 is provided with the first side wall 360, the second side wall 370 opposite to the first side wall 360, and a third side wall 380 and a fourth side wall 390 provided between the first side wall 360 and the second side wall 370 and provided around a rotation circumference of the gas regulator 230; the third side wall 380 is adjacent to or opposite to the fourth side wall 390, the first installation hole 340 is provided at the first side wall 360, the second side wall 370 is provided with a second installation hole 350 for the adjustment shaft 210 to pass through, the gas inlet hole 330 is provided at the third side wall 380, and the gas distribution hole 310 is provided at the fourth side wall 390.

It is understandable that the outer surface of the gas distribution member 300 can be provided in a square shape, and it can also be in other shapes certainly, which is not limited here. The first installation hole 340 and the second installation hole 350 are provided at the two opposite side walls of the gas distribution member 300, so that the adjustment shaft 210 can be installed from the first installation hole 340 and pass through the second installation hole 350 to improve the stability and convenience of installation. The gas inlet hole 330 and the gas distribution hole 310 are provided at different side walls of the gas distribution member 300, so that the gas flows in from one side of the gas distribution member 300 and is discharged from the other side of the gas distribution member 300, which is conducive to improving the smoothness of the gas flow.

In an embodiment, the gas distribution member 300 is provided with the first side wall 360, the second side wall 370 opposite to the first side wall 360, and an outer peripheral wall provided between the first side wall 360 and the second side wall 370; the first installation hole 340 is provided at the first side wall 360, the second side wall 370 is provided with a second installation hole 350 for the adjustment shaft 210 to pass through, the gas inlet hole 330 and the gas distribution hole 310 are provided at the outer peripheral wall of the gas distribution member 300 and are provided at intervals around a rotation circumference of the gas regulator 230.

It can be understood that the first installation hole 340 and the second installation hole 350 are on two opposite side walls of the gas distribution member 300, so that the adjustment shaft 210 can be conveniently installed into the first installation hole 340 and pass through the second installation hole 350 to improve the installation stability and convenience of installation.

In order to improve the smoothness of gas flow and avoid the gas regulator 230 from covering the gas inlet hole 330, in some embodiment, along the axial direction of the adjustment shaft 210, the gas inlet hole 330 and the gas distribution hole 310 are staggered and provided at the outer peripheral wall of the gas distribution member 300, so that the gas inlet hole 330 is in a normally open state, which is conducive to the smooth flow of gas into the gas distribution chamber 320.

In an embodiment, the gas distribution member 300 is of a cylindrical shape. With this arrangement, the gas distribution member 300 has a simple structure and is easy to process.

Referring to FIG. 10, FIG. 12 and FIG. 16, in an embodiment, the gas regulator 230 and the adjustment shaft 210 are configured to form a gas supply notch 231, or the gas regulator 230 is provided with a gas supply notch 231; when the gas regulator 230 rotates within a first angle range, a notch of the gas supply notch 231 is at least partially provided toward the gas distribution hole 310 to unblock the gas distribution hole 310; and when the gas regulator 230 rotates within a second angle range, the notch of the gas supply notch 231 is provided toward a direction outside the gas distribution hole 310, and an outer peripheral wall of the gas regulator 230 is configured to block the gas distribution hole 310.

It is understandable that the specific numerical range of the first angle range and the specific numerical range of the second angle range are not limited. For example, the first angle range may be 0 degrees to 45 degrees, or 0 degrees to 60 degrees, or 0 degrees to 90 degrees, or 0 degrees to 180 degrees, or 0 degrees to 270 degrees, etc.; the second angle range may be an angle range other than the first angle range, for example, 150 degrees to 360 degrees, or 180 degrees to 360 degrees, or 270 degrees to 360 degrees, etc. In an embodiment, the first angle range and the second angle range have no overlapping range.

The minimum gas flow area required when the gas is in the minimum load state is S1, for the gas regulator 230, 0 degrees may represent that the gas regulator 230 is in a preset initial position, and the preset initial position may be the position where the gas regulator 230 adjusts the gas flow area of the gas distribution hole 310 to S1.

As for the specific shape and position of the notch of the gas supply notch 231, there is no limitation. Specifically, in this embodiment, the first angle range is 0 degrees to 90 degrees; the second angle range is an angle range other than 0 degrees to 90 degrees, that is, when the gas regulator 230 rotates within the range of 0 degrees to 90 degrees, the notch of the gas supply notch 231 is at least partially disposed toward the gas distribution hole 310 to unblock the gas distribution hole 310.

As shown in FIG. 3 to FIG. 5, as well as FIG. 12 and FIG. 16, when the gas regulator 230 is at a position of 0 degrees, a part of the notch of the gas supply notch 231 is disposed toward the gas distribution hole 310, so that the gas regulator 230 adjusts the gas flow area of the gas distribution hole 310 to be equal to the minimum flow area required when the gas is at the minimum load state, which is the minimum amount of gas mixed by the premixer 10.

As shown in FIG. 6 to FIG. 8, as well as FIG. 12 and FIG. 16, when the gas regulator 230 is at a position of 90 degrees, the notch of the gas supply notch 231 is at least partially set toward the gas distribution hole 310, so that the gas regulator 230 adjusts the gas flow area of the gas distribution hole 310 to the maximum, and the gas regulator 230 fully unblocks the gas distribution hole 310, which is the maximum amount of gas mixed by the premixer 10. When the gas regulator 230 is at a position between 0 degrees and 90 degrees, the amount of gas mixed by the premixer 10 is between the minimum and the maximum. In this way, the gas flow area of the gas distribution hole 310 can be adjusted.

The adjustment shaft 210 drives the air regulator 220 and the gas regulator 230 to rotate synchronously. When the gas regulator 230 rotates within the first angle range, the air regulator 220 also rotates within the first angle range. When the air regulator 220 rotates within the first angle range, the gap between the air regulator 220 and the inner wall of the air channel 110 changes, thereby adjusting the air flow area of the air channel 110.

In this embodiment, the first angle range is 0 degrees to 90 degrees; the second angle range is an angle range other than 0 degrees to 90 degrees, that is, the air regulator 220 can rotate within the range of 0 degrees to 90 degrees. For the air regulator 220, 0 degrees may indicate that the air regulator 220 is at a preset initial position, and the preset initial position of the air regulator 220 corresponds to the preset initial position of the gas regulator 230. The preset initial position of the gas regulator 230 is the position where the gas regulator 230 adjusts the gas flow area of the gas distribution hole 310 to S1, and the preset initial position of the air regulator 220 is the position where the air regulator 220 adjusts the air flow area of the air channel 110 to S2. The ratio of the amount of air flowing through the air channel 110 when the air flow area is S2 to the amount of gas flowing through the gas channel 120 when the gas flow area is S1 is the air-fuel ratio preset by the premixer 10.

That is, as shown in FIG. 3 to FIG. 5, when the gas regulator 230 is at the position of 0 degrees, this is the minimum amount of gas mixed by the premixer 10; when the air regulator 220 is at the position of 0 degrees, this is the minimum amount of air mixed by the premixer 10; the minimum amount of gas mixed by the premixer 10 and the minimum amount of air mixed by the premixer 10 are mixed to form the minimum amount of premixed gas-air, and the minimum amount of premixed gas-air corresponds to the minimum load of gas.

As shown in FIG. 6 to FIG. 8, when the air regulator 220 is at the position of 90 degrees, the gap between the air regulator 220 and the inner wall of the air channel 110 is the largest, and this is the maximum amount of air mixed by the premixer 10; when the gas regulator 230 is at the position of 90 degrees, the premixer 10 mixes the maximum amount of gas, the maximum amount of gas mixed by the premixer 10 and the maximum amount of air mixed by the premixer 10 are mixed to form the maximum amount of premixed gas-air, and the maximum amount of premixed gas-air corresponds to the maximum load of gas.

When the air regulator 220 is at the position between 0 degrees and 90 degrees, the amount of air mixed by the premixer 10 is between the minimum and the maximum at this time, so that the air flow area of the air channel 110 can be adjusted.

Referring to the embodiments of FIG. 13 to FIG. 17, the gas regulator 230 is annularly provided at a portion of the outer peripheral wall of the adjustment shaft 210, and is enclosed with a remaining outer peripheral wall of the adjustment shaft 210 to form the gas supply notch 231; the gas supply notch 231 is provided with a first notch 232 and a second notch 233, the first notch 232 opens outwardly along an axial direction of the adjustment shaft 210 and communicating with the gas inlet hole 330, the second notch 233 opens outwardly along a radial direction of the adjustment shaft 210, and the second notch 233 is configured to be selectively provided toward the gas distribution hole 310 as the gas regulator 230 rotates.

It is understandable that the shapes and sizes of the first notch 232 and the second notch 233 are not limited and can be specifically set according to the structure and needs of the gas regulator 230. The first notch 232 communicates with the gas inlet hole 330, so that the gas can flow smoothly into the gas supply notch 231. The second notch 233 is provided at the outer peripheral wall of the gas regulator 230. When the gas regulator 230 is required to unblock the gas distribution hole 310, the second notch 233 is rotated toward the gas distribution hole 310; when the gas regulator 230 is required to block the gas distribution hole 310, the second notch 233 is rotated toward the outside of the gas distribution hole 310, so that the outer peripheral wall of the gas regulator 230 blocks the gas distribution hole 310. In this way, the method of adjusting the gas flow area of the gas distribution hole 310 is simple, which is conducive to simplifying the structure of the premixer 10.

The gas regulator 230 may be block-shaped or plate-shaped, and the specific number of the adjust blocks or adjust plates constituting the gas regulator is not limited, that is, the gas regulator 230 may be formed by a combination of multiple adjust blocks or multiple adjust plates.

As shown in FIG. 13 to FIG. 15, in an embodiment, the gas regulator 230 includes a plurality of adjust plates connected in sequence, and the gas regulator 230 and the adjustment shaft 210 form a gas supply notch 231. As shown in FIG. 14, the gas supply notch 231 is provided with a first notch 232, and the first notch 232 opens outwardly along the axial direction of the adjustment shaft 210. As shown in FIG. 15, the gas supply notch 231 is provided with a second notch 233, and the second notch 233 opens outwardly along the radial direction of the adjustment shaft 210.

As shown in FIG. 16 and FIG. 17, in another embodiment, the gas regulator 230 is block-shaped, and a gas supply notch 231 is provided at the gas regulator 230. The gas supply notch 231 is provided with a first notch 232, and the first notch 232 opens outwardly along the axial direction of the adjustment shaft 210. The gas supply notch 231 is provided with a second notch 233, and the second notch 233 opens outwardly along the radial direction of the adjustment shaft 210.

As shown in FIG. 16 and FIG. 17, in an embodiment, the gas regulator 230 further includes a gas shield 234, the gas shield 234 is provided at one end of the gas supply notch 231 distant from the first notch 232 along the axial direction of the adjustment shaft 210 to cover one end of the gas supply notch 231 distant from the gas inlet hole 330. It can be understood that by setting the gas shield 234, not only can block the gas from flowing along the axial direction of the adjustment shaft 210 toward the end distant from the first notch 232, so that when the gas needs to be mixed, the gas flowing into the gas supply notch 231 can flow smoothly from the second notch 233 toward the gas distribution hole 310. Moreover, the gas shield 234 also enriches the integrity of the gas regulator 230, so that the gas regulator 230 is more complete in the rotation circumference, which is conducive to reducing the shaking and increasing the rotation stability of the gas regulator 230.

Referring to the embodiments of FIG. 9 to FIG. 17, an inner cavity wall of the gas distribution chamber 320 at the gas distribution hole 310 is circular in cross section along a radial direction of the adjustment shaft 210, and the gas regulator 230 is provided with an arc-shaped outer wall surface adapted to a cavity wall of the gas distribution chamber 320.

It can be understood that the contour formed by the rotation of the arc-shaped outer wall surface of the gas regulator 230 is circular, and the circular contour can be adapted to the inner cavity wall with a circular cross section, so that the gas regulator 230 can stably rotate in the gas distribution chamber 320, thereby improving the adaptability of the gas regulator 230 to the gas distribution member 300.

In an embodiment, the gas regulator 230 is fan-shaped cross section along the radial direction of the adjustment shaft 210. Such arrangement makes it easy for the gas regulator 230 to form a gas supply notch 231 with the adjustment shaft 210, and the outer peripheral wall of the gas regulator 230 can selectively unblock or block the gas distribution hole 310 as the adjustment shaft 210 rotates, and the size of the outer peripheral wall of the gas regulator 230 is adapted to the size of the gas distribution hole 310.

Referring to FIG. 13 and FIG. 14, in an embodiment, the gas regulator 230 is provided with a gas through hole 235 provided between the adjustment shaft 210 and the outer peripheral wall of the gas regulator 230, and the gas through hole 235 is configured to penetrate opposite sides of the gas regulator 230 along a circumferential direction of the adjustment shaft 210.

It can be understood that the shape, size and number of the gas through hole 235 are not limited, as long as the gas can pass through the gas regulator 230 along the gas through hole 235. By providing the gas through hole 235, it is beneficial to improve the smoothness of the gas flow in the gas distribution chamber 320, that is, it can improve the smoothness of the gas flow from the gas distribution chamber 320 through the gas distribution hole 310.

Referring to FIG. 3, in an embodiment, the base 100 includes a base body 150 and a cover plate 160, the base body 150 is provided with the gas channel 120, one side of the base body 150 is provided with an installation port 151 communicating with the gas channel 120, the gas distribution member 300 is provided in the gas channel 120 from the installation port 151, and the cover plate 160 is detachably covered at the installation port 151; the regulate assembly 200 includes an regulator 240, and the end of the adjustment shaft 210 distant from the air regulator 220 passes through the cover plate 160 and is connected to the regulator 240.

It is understandable that the regulator 240 is a motor, and the motor drives the adjustment shaft 210 to rotate, thereby driving the air regulator 220 and the gas regulator 230 to rotate synchronously. By setting the installation port 151, it is convenient for the gas distribution member 300 to be installed in the gas channel 120, and the cover plate 160 can limit the gas distribution member 300 to ensure the stability of the installation of the gas distribution member 300 in the gas channel 120. One end of the adjustment shaft 210 passes out from the cover plate 160 to facilitate connection with the motor. It can be seen that the structure of the premixer 10 of the present application is reasonable and easy to assemble and disassemble.

In an embodiment, the premixer 10 further includes a first sealer 500 disposed between the base body 150 and the cover plate 160 to seal the gap between the base body 150 and the cover plate 160.

In an embodiment, a plurality of the gas distribution holes 310 are provided, and areas of any two of the gas distribution holes 310 are equal, or areas of at least two of the gas distribution holes 310 are different. In this way, the plurality of gas distribution holes 310 are provided at intervals, and the areas of the plurality of gas distribution holes 310 can be at least partially the same, or at least partially different, which is not specifically limited here.

In an embodiment, the gas distribution member 300 and the gas regulator 230 are both provided in a plate shape, and a rotation axis of the gas regulator 230 is perpendicular to the gas distribution member 300. In this way, by rotating the gas regulator 230, the gas flow area of the gas distribution hole 310 at the gas distribution member 300 can be adjusted.

In an embodiment, a rotation axis of the air regulator 220 is configured to intersect with a center line of the air channel 110. In this way, the distribution of the air regulator 220 in the air channel 110 is more uniform, which simplifies the design and processing difficulty of the component, that is, reduces the complexity of the component. The center line of the air channel 110 refers to an imaginary straight line passing through the center position of the air flow in the air channel 110, that is, the geometric center line that runs through the air channel 110, which usually indicates the flow direction of the air.

In an embodiment, the air regulator 220 is provided in the air channel 110, so as to prevent the air regulator 220 from extending beyond the base 100, which is conducive to the miniaturization of the premixer 10.

In an embodiment, the adjustment shaft 210 and the gas regulator 230 are an integrated structure. In this way, the adjustment shaft 210 and the gas regulator 230 are integrated into a whole, which reduces the assembly and manufacturing costs and improves the stability of the rotation of the gas regulator 230.

Referring to FIG. 3 to FIG. 5, in an embodiment, the air regulator 220 is provided with a first cover position for adjust the air passing area of the air channel 110 to minimum; in the first cover position, an air pass gap is formed between an outer wall of the air regulator 220 and an inner wall of the air channel 110. With this arrangement, when the air regulator 220 rotates within any angle range, the air can always flow into the gas-air mixed channel 130 from the gap between the air regulator 220 and the inner wall of the air channel 110, which helps to reduce the difficulty of the premixer 10 in adjusting the air intake amount.

In the first cover position, the area of the air pass gap between the outer wall of the air regulator 220 and the inner wall of the air channel 110 is S2, and the minimum flow area required when the gas is in the minimum load state is S1; the ratio of the amount of air when the area of the air flowing through the air pass gap is S2 to the amount of gas when the gas flow area of the gas flowing through the gas channel 120 is S1 is the air-fuel ratio preset by the premixer 10; the air-fuel ratio preset by the premixer 10 is the design value, so the size of the area S2 of the air pass gap can be determined. The air regulator 220 is in the first cover position, which is the preset initial position of the air regulator 220 in the aforementioned content, that is, the position of the air regulator 220 at 0 degrees.

In an embodiment, the air regulator 220 includes an air flap 221 rotatably provided at the air channel 110 to unblock or block the air channel 110; a rotation axis of the air flap 221 is perpendicular to a center line of the air channel 110; a virtual plane formed by the rotation axis of the air flap 221 and the center line of the air channel 110 is defined as a first plane; the air flap 221 is provided with a first state and a second state. In the first state, the air flap 221 is perpendicular to the first plane (as shown in FIG. 3 to FIG. 5). In the second state, the air flap 221 is parallel to the first plane (as shown in FIG. 6 to FIG. 8).

It can be understood that the center line of the air channel 110 refers to an imaginary straight line passing through the center position of the air flow in the air channel 110, that is, the geometric center line that runs through the air channel 110, which usually indicates the flow direction of the air. The rotation axis of the air flap 221 and the center line of the air channel 110 form a first plane. When the air flap 221 is in the first state, the air flap 221 is perpendicular to the first plane, and the air flow area of the air channel 110 is the smallest at this time. When the air flap 221 is in the second state, the air flap 221 is parallel to the first plane, and the air flow area of the air channel 110 is the largest at this time.

The air flap 221 rotates within the first angle range. In this embodiment, the first angle range is 0 degrees to 90 degrees. The position of the air flap 221 in the first state is the position of the air flap 221 at 0 degrees (as shown in FIG. 3 to FIG. 5). The position of the air flap 221 in the second state is the position of the air flap 221 at 90 degrees (as shown in FIG. 6 to FIG. 8). The content of the first angle range being 0 degrees to 90 degrees can be referred to above and will not be repeated here.

Referring to FIG. 4 and FIG. 5, in an embodiment, the gas channel 120 includes a gas homogenizing flow chamber 121, the gas homogenizing flow chamber 121 communicates with a gas outlet end of the gas distribution hole 310 and the gas-air mixed channel 130, and the gas homogenizing flow chamber 121 is provided with a corner 122 to cause the gas flow uniformly into the gas-air mixed channel 130.

It can be understood that by providing the corner 122 in the gas homogenizing flow chamber 121, the flow direction of the gas in the gas homogenizing flow chamber 121 can be changed, thereby adjusting the uniformity of the gas, so that the gas after passing through the corner 122 flows into the gas-air mixed channel 130 in a uniform distribution. As for the angle of the corner 122, it is not limited, for example but not limited to: 60 degrees, 90 degrees, 150 degrees, 180 degrees, etc., which can be set according to needs.

In an embodiment, the angle of the corner 122 is 180 degrees, so that the flow direction of the gas flowing out of the corner 122 is opposite to the flow direction of the gas flowing into the corner 122.

In an embodiment, the gas homogenizing flow chamber 121 located downstream of the corner 122 is of an annular shape, so that the gas flowing out of the corner 122 can be dispersed around the annular gas homogenizing flow chamber 121, which is conducive to improving the uniformity of the gas distribution.

In an embodiment, a flow direction of air along the air channel 110 is parallel to a flow direction of the gas passing through the gas distribution hole 310. In this way, the gas flowing out of the gas outlet end of the gas distribution hole 310 changes its flow direction through the corner 122, thereby improving 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-air.

In an embodiment, a gas injection inlet 430 is formed at an intersection of the gas channel 120 and the gas-air mixed channel 130; along an axial direction of the adjustment shaft 210, the corner 122 is provided between the gas distribution hole 310 and the gas injection inlet 430; in a flow direction of the gas flowing through the gas distribution hole 310, the corner 122 and the gas injection inlet 430 are staggered; along an axial projection of the adjustment shaft 210, the gas injection inlet 430 and the gas distribution hole 310 are provided at a same side of the corner 122 to cause a flow direction of the gas in a partial channel of the gas channel 120 be opposite to the flow direction of the gas passing through the gas distribution hole 310. Such a configuration defines the relative positions of the gas distribution hole 310, the corner 122 and the gas injection inlet 430. Along the flow direction of the gas in the gas channel 120, the gas flows through the gas distribution hole 310, the corner 122 and the gas injection inlet 430 in sequence and flows into the gas-air mixed channel 130. The corner 122 changes the flow direction of the gas in the gas homogenizing flow chamber 121, so that the gas can flow uniformly through the gas injection inlet 430 and flow into the gas-air mixed channel 130.

Referring to FIG. 3 to FIG. 5 as well as FIG. 18 and FIG. 19, in an embodiment, the premixer 10 further includes a venturi tube 400. The venturi tube 400 is provided with a venturi channel 410, an air inlet 420, a gas injection inlet 430 and a gas-air mixed outlet 440, and the air inlet 420, the gas injection inlet 430 and the gas-air mixed outlet 440 are communicating with the venturi channel 410; the venturi tube 400 is provided in the gas-air mixed channel 130, the air inlet 420 communicates with the air channel 110, the gas injection inlet 430 communicates with the gas channel 120, and the venturi channel 410 is configured to allow air in the air channel 110 to flow into and inject gas in the gas channel 120 to allow the air and the gas to mix.

The venturi tube 400 is a pipe that uses the principle of fluid flow to adjust the flow rate, which controls the speed and pressure of the fluid by changing the pipe cross-section, thereby achieving the control of flow rate or volume of flow.

In an embodiment, the venturi tube 400 includes a first pipe section 450 and a second pipe section 460. The first pipe section 450 includes a tapered section 451 and a transition section 452 sequentially provided along a gas outlet direction of the air channel 110, one end of the tapered section 451 distant from the transition section 452 is provided with the air inlet 420, one end of the transition section 452 distant from the tapered section 451 is inserted into the second pipe section 460, an outer wall of the transition section 452 and an inner wall of the second pipe section 460 are provided at intervals to form the gas injection inlet 430, a flow area of the air inlet 420 is larger than a flow area of the transition section 452, and the flow area of the transition section 452 is smaller than a flow area of the second pipe section 460. In this arrangement, when air passes through the tapered section 451, the flow rate of air increases and the pressure decreases, the flow rate of air in the transition section 452 becomes the fastest and the pressure decreases the lowest. Then, air flows into the second pipe section 460. Since the flow area of the transition section 452 is smaller than the flow area of the second pipe section 460, a negative pressure is formed at the gas injection inlet 430 formed between the transition section 452 and the second pipe section 460. Under the action of the negative pressure, the gas is sucked into the second pipe section 460 and mixed with the air, thereby forming the mixed gas-air.

In an embodiment, the gas injection inlet 430 is of an annular shape, and the venturi tube 400 further includes a connection portion 470, and the connection portion 470 is at least partially provided in the gas injection inlet 430 and is configured to connect the outer wall of the transition section 452 and the inner wall of the second pipe section 460 to separate the gas injection inlet 430. The first pipe section 450 and the second pipe section 460 are connected by the connection portion 470, ensuring that the outer wall of the transition section 452 and the inner wall of the second pipe section 460 can be spaced to form the gas injection inlet 430, thereby achieving the function of injecting gas; and the connection portion 470 separates the gas injection inlet 430, so that the gas can flow into the second pipe section 460 from different directions, thereby improving the uniformity of the gas flowing into the second pipe section 460.

In an embodiment, the venturi tube 400 includes a plurality of the connection portions 470, and the plurality of the connection portions 470 are sequentially provided at intervals around a circumference of the transition section 452 to divide the gas injection inlet 430 into a plurality of parts. This arrangement not only improves the stability of the connection between the first pipe section 450 and the second pipe section 460, but also improves the uniformity of the gas flowing into the second pipe section 460, that is, improves the uniformity of the mixed gas-air.

In an embodiment, the first pipe section 450, the second pipe section 460 and the plurality of the connection portions 470 are an integrated structure. This arrangement, that is, the first pipe section 450, the second pipe section 460 and the plurality of connection portions 470 are integrated into a whole, reduces the assembly and manufacturing costs, and improves the stability of the venturi tube 400.

In an embodiment, the premixer 10 further includes a second sealer 600 sleeved at the venturi tube 400 to seal a gap between the venturi tube 400 and an inner wall of the gas-air mixed channel 130 at an outlet of the gas-air mixed channel 130.

In an embodiment of the present application, a premixer 10 includes a base 100, a regulate assembly 200 and a gas distribution member 300. The base 100 is provided with an air channel 110, a gas channel 120 and a gas-air mixed channel 130; the gas-air mixed channel 130 communicates with the air channel 110 and the gas channel 120. The regulate assembly 200 including an adjustment shaft 210, an air regulator 220 provided at the adjustment shaft 210 and a gas regulator 230 provided at the adjustment shaft 210; the adjustment shaft 210 is rotatably provided at the base 100. The air regulator 220 is provided at the air channel 110, and the air regulator 220 is configured to adjust air flow area of the air channel 110 as the adjustment shaft 210 rotates to adjust amount of air flowing into the gas-air mixed channel. The gas regulator 230 is provided at the gas channel 120, and the gas regulator 230 is configured to adjust gas flow area of the gas channel 120 as the adjustment shaft 210 rotates to adjust amount of gas flowing into the gas-air mixed channel 130. The gas distribution member 300 is at least partially provided in the gas channel 120, the gas distribution member 300 is provided with a gas distribution hole 310 communicating with the gas channel 120, the adjustment shaft 210 is external to the gas distribution hole 310, and the gas regulator 230 is rotatable with respect to the gas distribution member 300 to unblock or block the gas distribution hole 310 and adjust the gas flow area of the gas distribution hole 310. The gas distribution member 300 is provided with a gas distribution chamber 320, a gas inlet hole 330 communicating with the gas distribution chamber 320, and the gas distribution hole 310 communicating with the gas distribution chamber 320; the gas inlet hole 330 communicates with an external gas source, the gas regulator 230 is rotatably mounted in the gas distribution chamber 320 to unblock or block the gas distribution hole 310, and a rotation axis of the gas regulator 230 is configured to coincide with a rotation axis of the air regulator 220. An installation through hole 140 communicating with the air channel 110 and the gas channel 120 is provided in the base 100, the adjustment shaft 210 is configured to pass through the gas distribution chamber 320 and extend from the installation through hole 140 into the air channel 110, and the air regulator 220 and the gas regulator 230 are provided at both sides of the installation through hole 140 along an axial direction of the adjustment shaft 210. The gas inlet hole 330 and the gas regulator 230 are staggered along an axial direction of the adjustment shaft 210. The gas regulator 230 and the adjustment shaft 210 are configured to form a gas supply notch 231, or the gas regulator 230 is provided with a gas supply notch 231; when the gas regulator 230 rotates within a first angle range, a notch of the gas supply notch 231 is at least partially provided toward the gas distribution hole 310 to unblock the gas distribution hole 310; and when the gas regulator 230 rotates within a second angle range, the notch of the gas supply notch 231 is provided toward a direction outside the gas distribution hole 310, and an outer peripheral wall of the gas regulator 230 is configured to block the gas distribution hole 310. The gas regulator 230 is annularly provided at a portion of the outer peripheral wall of the adjustment shaft 210, and is enclosed with a remaining outer peripheral wall of the adjustment shaft 210 to form the gas supply notch 231; the gas supply notch 231 is provided with a first notch 232 and a second notch 233, the first notch 232 opens outwardly along an axial direction of the adjustment shaft 210 and communicating with the gas inlet hole 330, the second notch 233 opens outwardly along a radial direction of the adjustment shaft 210, and the second notch 233 is configured to be selectively provided toward the gas distribution hole 310 as the gas regulator 230 rotates. An inner cavity wall of the gas distribution chamber 320 at the gas distribution hole 310 is circular in cross section along a radial direction of the adjustment shaft 210, and the gas regulator 230 is provided with an arc-shaped outer wall surface adapted to a cavity wall of the gas distribution chamber 320. The gas regulator 230 is fan-shaped cross section along the radial direction of the adjustment shaft 210. The adjustment shaft 210 and the gas regulator 230 are an integrated structure. The air regulator 220 is provided with a first cover position for adjust the air passing area of the air channel 110 to minimum; in the first cover position, an air pass gap is formed between an outer wall of the air regulator 220 and an inner wall of the air channel 110. The gas channel 120 includes a gas homogenizing flow chamber 121, the gas homogenizing flow chamber 121 communicates with a gas outlet end of the gas distribution hole 310 and the gas-air mixed channel 130, and the gas homogenizing flow chamber 121 is provided with a corner 122 to cause the gas flow uniformly into the gas-air mixed channel 130. The premixer 10 further includes a venturi tube 400; the venturi tube 400 is provided with a venturi channel 410, an air inlet 420, a gas injection inlet 430 and a gas-air mixed outlet 440, and the air inlet 420, the gas injection inlet 430 and the gas-air mixed outlet 440 are communicating with the venturi channel 410; the venturi tube 400 is provided in the gas-air mixed channel 130, the air inlet 420 communicates with the air channel 110, the gas injection inlet 430 communicates with the gas channel 120, and the venturi channel 410 is configured to allow air in the air channel 110 to flow into and inject gas in the gas channel 120 to allow the air and the gas to mix.

It can be understood that the beneficial effects of the specific technical features of the premixer 10 in this solution can refer to the beneficial effects of the corresponding technical features of the premixer 10 in the aforementioned embodiments, and will not be repeated here.

The present application further proposes a premixer 10 including a base 100, a regulate assembly 200 and a gas distribution member 300. The base 100 is provided with an air channel 110, a gas channel 120 and a gas-air mixed channel 130; the gas-air mixed channel 130 communicates with the air channel 110 and the gas channel 120. The regulate assembly 200 includes an adjustment shaft 210, an air flap 221 provided at the adjustment shaft 210 and a gas regulator 230 provided at the adjustment shaft 210; the adjustment shaft 210 is rotatably provided at the base 100. The air flap 221 is provided at the air channel 110, and the air flap 221 is configured to adjust air flow area of the air channel 110 as the adjustment shaft 210 rotates to adjust amount of air flowing into the gas-air mixed channel 130. The gas distribution member 300 is provided in the gas channel 120; the gas distribution member 300 is provided with a gas distribution chamber 320, a gas inlet hole 330 communicating with the gas distribution chamber 320, and the gas distribution hole 310 communicating with the gas distribution chamber 320, and the gas inlet hole 330 communicates with an external gas source. The gas channel 120 includes a gas homogenizing flow chamber 121, the gas homogenizing flow chamber 121 communicates with a gas outlet end of the gas distribution hole 310 and the gas-air mixed channel 130, and the gas homogenizing flow chamber 121 is provided with a corner 122 to cause the gas flow uniformly into the gas-air mixed channel 130. The gas regulator 230 is rotatably mounted in the gas distribution chamber 320, and a rotation axis of the gas regulator 230 is configured to coincide with a rotation axis of the air regulator 220; an inner cavity wall of the gas distribution chamber 320 at the gas distribution hole 310 is circular in cross section along a radial direction of the adjustment shaft 210, and the gas regulator 230 is provided with an arc-shaped outer wall surface adapted to a cavity wall of the gas distribution chamber 320; the gas regulator 230 and the adjustment shaft 210 are configured to form a gas supply notch 231, or the gas regulator 230 is provided with a gas supply notch 231. When the gas regulator 230 rotates within a first angle range, a notch of the gas supply notch 231 is at least partially provided toward the gas distribution hole 310 to unblock the gas distribution hole 310. When the gas regulator 230 rotates within a second angle range, the notch of the gas supply notch 231 is provided toward a direction outside the gas distribution hole 310, and an outer peripheral wall of the gas regulator 230 is configured to block the gas distribution hole 310.

It can be understood that the adjustment shaft 210 is penetrated at the base 100, part of the adjustment shaft 210 is provided in the air channel 110, part of the adjustment shaft 210 is provided in the gas channel 120, the air regulator 220 is provided at the adjustment shaft 210 in the air channel 110, and the gas regulator 230 is provided at the adjustment shaft 210 in the gas channel 120, so that the adjustment shaft 210 can drive the air regulator 220 and the gas regulator 230 to rotate synchronously. The adjustment shaft 210 can be in a drive connection with the regulator 240, and the adjustment shaft 210 can be driven to rotate by the regulator 240. The regulator 240 can be a motor. That is, one adjustment shaft 210 drives the air regulator 220 and the gas regulator 230 to rotate synchronously, so that the driving method of the air regulator 220 and the gas regulator 230 to rotate is simple, which is conducive to simplifying the structure of the premixer 10.

The air regulator 220 and the gas regulator 230 can rotate synchronously with the rotation of the adjustment shaft 210, so as to synchronously adjust the air flow area of the air channel 110 and the gas flow area of gas channel 120, so that the air flow area of air channel 110 and the gas flow area of gas channel 120 can be increased simultaneously or decreased simultaneously, thus realizing that the ratio of the amount of air and the amount of gas flowing into the gas-air mixed channel 130 under different load conditions can always be within a preset range, that is, realizing that the air-fuel ratio of the premixer 10 under different load conditions can always be within a better range, so that the combustion efficiency of the gas device can be improved when the premixer 10 is applied to the gas device. Moreover, one adjustment shaft 210 can drive the air regulator 220 and the gas regulator 230 to rotate synchronously to adjust the gas-air mixed 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 the present application 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.

The beneficial effects of the specific technical features of the premixer 10 in this solution can refer to the beneficial effects of the corresponding technical features of the premixer 10 in the aforementioned embodiments, which will not be repeated here.

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

In this embodiment, the gas device can be a gas water heater, a wall-mounted boiler, a gas stove and other equipment. The gas device may further include a burner and a fan. After the air and gas are mixed into the 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 via the burner's fire hole to achieve ignition and combustion. Under the regulation of the premixer 10, the combustion efficiency of the gas device can be improved.

The above are only some embodiments of the present application, and are not intended to limit the scope of the present application. Under the concept of the present application, any equivalent structure transformation made by using the description and accompanying drawings of the present application, or directly or indirectly applied in other related technical fields, is included within the scope of the present application.