COMPRESSOR, REFRIGERATION DEVICE AND OIL STABILIZING RING

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of International (PCT) Patent Application No. PCT/CN2024/139200, filed on Dec. 13, 2024, which claims priorities to Chinese patent applications No. 202410077924.5 and No. 202420131212.2, filed on Jan. 18, 2024, the entire contents of which are incorporated herein by reference.

FIELD

The present disclosure relates to the field of compressor technologies, and more particularly, to a compressor, a refrigeration device, and an oil stabilizing ring.

BACKGROUND

During operation of a compressor, a motor assembly drives a crankshaft to rotate, to realize gas compression work through a pump assembly. However, high-speed rotation of a rotor of a motor and the crankshaft and high-pressure gas at a discharge port of the pump assembly form a turbulent flow field, which disrupts stability of an oil level in an oil sump of the compressor, causing lubricating oil in the oil sump to move upward along with refrigerant gas and even reach an upper space of the motor, and causing a liquid level of the oil sump to drop. Moreover, since a pressure in a lower space of the motor assembly is greater than a pressure in the upper space, the lubricating oil is likely to accumulate significantly at the motor side, and a return speed is slow, resulting in a phenomenon that the oil level in the oil sump is excessively low. As a result, lubrication conditions of each kinematic pair in the pump assembly are affected, causing increased wear among various components, and ultimately affecting reliability of the compressor.

SUMMARY

The present disclosure aims to solve at least one of the technical problems in the related art. To this end, the present disclosure provides a compressor, a refrigeration device, and an oil stabilizing ring, to improve stability of an oil level of lubricating oil in the compressor and ensure return efficiency of the lubricating oil.

In a first aspect, the present disclosure provides a compressor. The compressor includes: a housing; a motor mounted in the housing; a pump assembly including a cylinder, the cylinder being mounted in the housing and located below the motor; and an oil stabilizing ring mounted in the housing and located between the cylinder and the motor, an outer circumferential edge of the oil stabilizing ring being at least partially spaced apart from an inner wall of the housing.

According to some embodiments of the present disclosure, the oil stabilizing ring is connected to the inner wall of the housing.

According to some embodiments of the present disclosure, the outer circumferential edge of the oil stabilizing ring has a notch recessed towards an axis of the oil stabilizing ring. The oil stabilizing ring is spaced apart from the inner wall of the housing at the notch. The oil stabilizing ring is connected to the inner wall of the housing at a part of the outer circumferential edge of the oil stabilizing ring where the notch is absent.

According to some embodiments of the present disclosure, a plurality of notches are provided and arranged at intervals in a circumferential direction of the oil stabilizing ring.

According to some embodiments of the present disclosure, at least two adjacent pairs of the plurality of notches have different distances between each pair.

According to some embodiments of the present disclosure, at least two of the plurality of notches are different in shape.

According to some embodiments of the present disclosure, spacings of at least two pairs of adjacent notches of the plurality of notches are differently set.

According to some embodiments of the present disclosure, at least two of the plurality of notches are different in shape.

According to some embodiments of the present disclosure, a shape of an outer periphery edge of the notch is one of an arc shape, a straight shape, a zigzag shape, or a corrugated shape.

According to some embodiments of the present disclosure, the oil stabilizing ring has a return hole extending through the oil stabilizing ring in an up-down direction.

According to some embodiments of the present disclosure, a plurality of return holes are formed on the oil stabilizing ring and arranged in a circumferential direction of the oil stabilizing ring.

According to some embodiments of the present disclosure, one of the plurality of return holes corresponds to a slide vane groove of the cylinder in the up-down direction.

According to some embodiments of the present disclosure, the pump assembly further includes an upper bearing mounted at an upper surface of the cylinder. The oil stabilizing ring is located above the upper bearing. The upper bearing has a communication hole that is offset from the return hole in the up-down direction.

According to some embodiments of the present disclosure, the pump assembly further includes a muffler mounted at a side of the upper bearing facing away from the cylinder. The muffler has a discharge port. The oil stabilizing ring is disposed around the muffler. An inner ring of the oil stabilizing ring is spaced apart from the muffler.

According to some embodiments of the present disclosure, a thickness of the oil stabilizing ring in the up-down direction is W1, and a thickness of a main body portion of the upper bearing in the up-down direction is W2, where 3mm≤W1≤W2.

According to some embodiments of the present disclosure, a cross-section of the return hole in a radial direction is circular, elliptical, or polygonal.

According to some embodiments of the present disclosure, a dimension of a cross-section of the return hole in a radial direction varies along the axial direction.

According to some embodiments of the present disclosure, the return hole has a cylindrical shape.

According to some embodiments of the present disclosure, a height of the housing in an up-down direction is H, and a spacing between an upper surface of the oil stabilizing ring and an upper surface of the housing is H1, where ⅖≤H1/H≤ 7/10.

According to some embodiments of the present disclosure, the motor is spaced apart from an inner side wall of the housing.

In a second aspect, the present disclosure provides a refrigeration device. The refrigeration device includes the compressor according to any embodiment in the first aspect.

In a third aspect, the present disclosure provides an oil stabilizing ring applied to a compressor. An outer circumferential edge of the oil stabilizing ring has a notch recessed towards an axis of the oil stabilizing ring. The oil stabilizing ring is adapted to be spaced apart from an inner wall of a housing of the compressor at the notch. The oil stabilizing ring is adapted to be connected to the inner wall of the housing of the compressor at a part of the outer circumferential edge of the oil stabilizing ring where the notch is absent.

Additional aspects and advantages of the present disclosure will be provided in part in the following description, or will in part become apparent from the following description or be learned from practicing of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become more apparent and more understandable from the following description of embodiments taken in conjunction with the accompanying drawings.

FIG. 1 is a first schematic structural view of a compressor according to some embodiments of the present disclosure.

FIG. 2 is an enlarged view of part A in FIG. 1.

FIG. 3 is a first schematic structural view of a pump assembly according to some embodiments of the present disclosure.

FIG. 4 is a second schematic structural view of a pump assembly according to some embodiments of the present disclosure.

FIG. 5 is a fist schematic structural view of an oil stabilizing ring according to some embodiments of the present disclosure.

FIG. 6 is a first schematic structural view of an upper bearing according to some embodiments of the present disclosure.

REFERENCE NUMERALS OF THE ACCOMPANYING DRAWINGS

• • compressor 10;
  • housing 100, main housing 110, upper housing 120, lower housing 130, mounting cavity 140, base 150;
  • pump assembly 200, upper bearing 210, communication hole 211, discharge passage 212, upper cylinder 220, slide vane groove 221, partition plate 230, lower cylinder 240, lower bearing 250, crankshaft 260, main shaft portion 261, eccentric portion 262, muffler 270, slide vane 280;
  • motor 300, stator 310, rotor 320;
  • discharge pipe 400;
  • accumulator 500, suction pipe 510;
  • oil stabilizing ring 600, notch 610, return hole 620.

DETAILED DESCRIPTION

Embodiments of the present disclosure will be described in detail below with reference to examples thereof as illustrated in the accompanying drawings, throughout which same or similar elements, or elements having same or similar functions, are denoted by same or similar reference numerals. The embodiments described below with reference to the drawings are illustrative only, and are intended to explain, rather than limiting, the present disclosure.

As illustrated in FIG. 1 to FIG. 6, a compressor 10 according to the embodiments of the present disclosure is described below. The compressor 10 according to the embodiments of the present disclosure may be applied to a refrigeration system or a heat pump system, etc. Serving as a core component of a system, the compressor 10 supplies a high-temperature and high-pressure refrigerant to the system. The compressor 10 may be applied to the refrigeration system such as an air conditioner, a refrigerator, and a water dispenser, and may also be applied to the heat pump system such as an air-energy water heater and a floor heating system.

As illustrated in FIG. 1, the compressor 10 provided in the embodiments of the present disclosure includes a housing 100, a motor 300, a pump assembly 200, and an oil stabilizing ring 600.

The housing 100 has a mounting cavity 140 in the housing 100. The motor 300, the pump assembly 200, and the oil stabilizing ring 600 are all fixedly mounted in the mounting cavity 140.

It should be understood that, the pump assembly 200 and the motor 300 may be fixed to the housing 100 by welding, or by hot shrink fitting, or by other feasible fixing methods, which are not specifically limited herein. A bottom of the mounting cavity 140 is formed as an oil sump, which contains lubricating oil. The lubricating oil is used to lubricate and cool the pump assembly 200 and the motor 300, to improve operation stability of the compressor 10.

As illustrated in FIG. 1, the housing 100 in the embodiments of the present disclosure may include a main housing 110, an upper housing 120, and a lower housing 130. The main housing 110 may be cylindrical. The upper housing 120 may be fixedly connected to an upper end of the main housing 110. The lower housing 130 may be fixedly connected to a lower end of the main housing 110. A base 150 may be mounted at a bottom of the lower housing 130, and may be used for mounting of the compressor 10.

The compressor 10 may further include a discharge pipe 400 and an accumulator 500. The discharge pipe 400 may be connected to an upper end of the housing 100. Exemplarily, the discharge pipe 400 is fixedly connected to an upper end of the upper housing 120. The accumulator 500 may be connected to the main housing 110. Exemplarily, the accumulator 500 may be connected via a connection strap to improve connection stability of the accumulator 500. The accumulator 500 may be connected to the pump assembly 200 through a suction pipe 510 to supply refrigerant gas to the pump assembly 200. It should be understood that the pump assembly 200 in the embodiments of the present disclosure may include two cylinders. Therefore, two suction pipes 510 are provided, and the two suction pipes 510 respectively supply the refrigerant gas to the corresponding two cylinders.

As illustrated in FIG. 1, the compressor 10 in the embodiments of the present disclosure may be a two-cylinder compressor 10. The pump assembly 200 may include an upper bearing 210, an upper cylinder 220, a partition plate 230, a lower cylinder 240, and a lower bearing 250. The upper bearing 210, the upper cylinder 220, the partition plate 230, the lower cylinder 240, and the lower bearing 250 are connected in sequence in an up-down direction in the figure. The upper cylinder 220 and the lower cylinder 240 may be fixedly connected to the housing 100, to achieve stable connection of the pump assembly 200. It should be understood that the pump assembly 200 may also be fixedly connected to the housing 100 through components such as the upper bearing 210 and the lower bearing 250.

The motor 300 includes a stator 310 and a rotor 320. The stator 310 may be fixedly connected to the housing 100. The stator 310 has a cavity formed at a middle part of the stator 310. The rotor 320 is rotatably disposed in the cavity. The pump assembly 200 further includes a crankshaft 260, which is fixedly connected to the rotor 320 and driven for rotation by the motor 300. The crankshaft 260 includes a main shaft portion 261, and two eccentric portions 262 distributed in the up-down direction and connected to the main shaft portion 261. The main shaft portion 261 is rotatably connected to the upper bearing 210 and the lower bearing 250. The two eccentric portions 262 are rotatably disposed at the upper cylinder 220 and the lower cylinder 240, respectively. During rotation of the crankshaft 260, the refrigerant gas entering the cylinder through the suction pipe 510 can be compressed to do work. The compressed high-temperature and high-pressure refrigerant gas is then discharged into the mounting cavity 140 of the housing 100 through a discharge port of the pump assembly 200 and finally discharged from the compressor 10 through the discharge pipe 400.

In other embodiments, the compressor 10 according to embodiments of the present disclosure may also be a single-cylinder compressor 10. It should be understood that the pump assembly 200 includes the upper bearing 210, a cylinder, and the lower bearing 250 that are connected in sequence. The pump assembly 200 also includes the crankshaft 260. The main shaft portion 261 of the crankshaft 260 is rotatably connected to a main bearing and an auxiliary bearing. The eccentric portion 262 of the crankshaft 260 is rotatably disposed in the cylinder.

In some embodiments, the pump assembly 200 is disposed below the motor 300 in such a manner that the cylinder is mounted below the motor 300, the oil stabilizing ring 600 is mounted in the mounting cavity 140 of the housing 100 and located between the cylinder and the motor 300, and an outer circumferential edge of the oil stabilizing ring 600 is at least partially spaced apart from an inner wall of the housing 100.

As illustrated in FIG. 1 to FIG. 5, a dotted line in FIG. 5 represents the inner wall of the housing 100. The oil stabilizing ring 600 may be formed in a ring shape and arranged around the pump assembly 200. By mounting the oil stabilizing ring 600 between the cylinder and the motor 300, the oil stabilizing ring 600 is located above the cylinder. Therefore, the oil stabilizing ring 600 covers an upper side of the oil sump, without affecting a lubricating effect of the oil sump on the pump assembly 200. It should be understood that during operation of the compressor 10, a rapid flowing gas in the compressor 10 drives the lubricating oil to float upward. Through high-speed rotation of the crankshaft 260 and the rotor 320 of the motor 300, the lubricating oil is thrown onto an upper end surface of the motor 300, causing the lubricating oil to accumulate at an upper side of the motor 300. Further, the oil at an oil feed hole of the crankshaft 260 is prone to turbulence when being drawn away, which in turn generates eddy currents. In this way, an oil feeding effect of the compressor 10 is likely to be affected, causing a liquid level at a center of the oil sump to drop, which is not conducive to oil feeding to the crankshaft 260.

By providing the oil stabilizing ring 600 at the upper side of the oil sump, a projection of the oil stabilizing ring 600 in the up-down direction can at least partially block a gap between the pump assembly 200 and the inner wall of the housing 100, in such a manner that the oil stabilizing ring 600 can block an influence of a flow field generated between the motor 300 and the pump assembly 200 on the oil sump. In addition, the oil stabilizing ring 600 may be in contact with the liquid level of the oil sump of the compressor 10 in an operating state, which reduces a likelihood of generation of the eddy current and can effectively suppress fluctuation of the liquid level in the oil sump.

During the operation of the compressor, the lubricating oil driven to an upper side of the oil stabilizing ring generally returns downward into the oil sump along the inner wall of the housing. In the related art, the outer circumferential edge of the oil stabilizing ring is completely attached to the housing, and the lubricating oil only flows back through an oil leakage hole at the oil stabilizing ring. There is a certain distance between the oil leakage hole and the outer circumferential edge of the oil stabilizing ring. Therefore, the lubricating oil flowing back downward along the inner wall of the housing needs to move radially inward from the outer circumferential edge of the oil stabilizing ring to the oil leakage hole to realize backflow, which increases a return path and has a certain impact on return efficiency.

In some embodiments, the outer circumferential edge of the oil stabilizing ring 600 is at least partially spaced apart from the inner wall of the housing 100 to form an avoidance gap, in such a manner that the lubricating oil flowing back downward along the inner wall of the housing 100 can directly flow back into the oil sump through the avoidance gap. In this way, the oil stabilizing ring 600 has a small effect on the return efficiency of the lubricating oil while suppressing the fluctuation of the liquid level in the oil sump, increasing a return speed of the lubricating oil and ensuring an oil amount in the oil sump.

It should be noted that, when the compressor 10 is a multi-cylinder compressor 10, the oil stabilizing ring 600 is arranged to be located between an uppermost cylinder and the motor 300.

With the compressor 10 according to the embodiments of the present disclosure, by providing the oil stabilizing ring 600, the fluctuation of the oil level in the housing 100 can be suppressed when the compressor 10 is operating. By spacing at least part of the outer circumferential edge of the oil stabilizing ring 600 from the inner wall of the housing 100 to form a gap, the lubricating oil at the inner wall of the housing 100 can smoothly flow back through the gap into the oil sump at a lower side, with high return efficiency. In this way, stability of the oil volume in the oil sump is improved, and the reliability and performance of the compressor 10 are further improved.

According to some embodiments of the present disclosure, as illustrated in FIG. 1 and FIG. 2, the oil stabilizing ring 600 may be connected to the inner wall of the housing 100.

In some embodiments, the oil stabilizing ring 600 may be made of metal, providing the oil stabilizing ring 600 with certain structural strength. The outer circumferential edge of the oil stabilizing ring 600 may be welded to the inner wall of the housing 100, to enhance assembly strength of the oil stabilizing ring 600.

In some embodiments, the oil stabilizing ring 600 may be fixedly connected to the pump assembly 200, in such a manner that the outer circumferential edge of the oil stabilizing ring 600 is completely spaced apart from the inner wall of the housing 100, further improving the return efficiency. Exemplarily, the oil stabilizing ring 600 may be fixedly connected to the upper bearing 210.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, the outer circumferential edge of the oil stabilizing ring 600 has a notch 610 recessed towards an axis of the oil stabilizing ring 600. The oil stabilizing ring 600 may be spaced apart from the inner wall of the housing 100 at the notch 610, to form the avoidance gap. The oil stabilizing ring 600 may be connected to the inner wall of the housing 100 at a part of the outer circumferential edge of the oil stabilizing ring 600 where the notch 610 is absent. In this way, while the oil stabilizing ring 600 can be fixedly connected to the inner wall of the housing 100, the avoidance gap is formed to allow the lubricating oil to return.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, a plurality of notches 610 may be provided and arranged at intervals in a circumferential direction of the oil stabilizing ring 600. By providing the plurality of notches 610 to increase a flow area of the avoidance gap formed between the oil stabilizing ring 600 and the inner wall of the housing 100, the return efficiency is improved. In addition, the plurality of notches 610 are arranged at intervals in the circumferential direction of the oil stabilizing ring 600. On the one hand, such an arrangement facilitates the return of the lubricating oil at various positions in the circumferential direction of the housing 100, improving overall return efficiency. On the other hand, a part between two adjacent notches 610 can be fixedly connected to the inner wall of the housing 100, in such a manner that connection points between the oil stabilizing ring 600 and the inner wall of the housing 100 are more evenly distributed, and a connection structure is more stable.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, spacings of at least two pairs of adjacent notches of the plurality of notches 610 are differently set; and/or at least two of the plurality of notches 610 are different in shape.

In some embodiments, the spacing between any two adjacent notches 610 is not entirely the same. Each pair of adjacent notches 610 has a different spacing, or at least two pairs of adjacent notches 610 among a plurality of pairs of adjacent notches 610 have different spacings, in such a manner that positions of the notches 610 are unevenly arranged in the circumferential direction of the oil stabilizing ring 600.

In some embodiments, connecting lines between two ends of the notch 610 and the axis of the oil stabilizing ring 600 may form an included angle. Angles of the included angles corresponding to the notches 610 are not entirely the same; that is, opening degrees of the notches 610 are not entirely the same. Exemplarily, the angles of the included angles corresponding to the notches 610 may all be different, or the angles of the included angles corresponding to at least two notches 610 may be different.

In some embodiments, shapes of the notches 610 may not be entirely the same. Exemplarily, the shape of each notch 610 may be different, or at least two notches are different in shape.

In some embodiments, the plurality of notches 610 are unevenly arranged at the oil stabilizing ring 600, which facilitates the return of the lubricating oil.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, a shape of an outer peripheral edge of the notch 610 is not specifically limited, and a shape of the outer peripheral edge of the notch 610 may be one of an arc shape, a straight shape, a zigzag shape, or a corrugated shape. In this way, passage capability of oil droplets can be improved, and a likelihood of the lubricating oil forming an oil seal when passing through a gap between the notch 610 of the oil stabilizing ring 600 and the inner wall of the housing 100 can be reduced, which would otherwise affect passage capability of the lubricating oil.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, the oil stabilizing ring 600 may have a return hole 620 extending through the oil stabilizing ring in the up-down direction. By providing the return hole 620 at the oil stabilizing ring 600, the lubricating oil that directly falls onto an upper surface of the oil stabilizing ring 600 and the lubricating oil that flows to the upper surface of the oil stabilizing ring 600 along a connection between the inner wall of the housing 100 and the oil stabilizing ring 600 can flow back into the oil sump through the return hole 620, improving the return efficiency of the lubricating oil.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, the oil stabilizing ring 600 has a plurality of return holes 620. The plurality of return holes 620 are arranged in the circumferential direction of the oil stabilizing ring 600. By providing the plurality of return holes 620, a coverage area of the return hole 620 is increased to improve the return efficiency of the lubricating oil. By distributing the plurality of return holes 620 along the oil stabilizing ring 600, uniformity of arrangement of the return hole 620 is improved, which facilitates the return of the lubricating oil at various positions, and improves the return efficiency.

According to some embodiments of the present disclosure, as illustrated in FIG. 4 and FIG. 5, one of the plurality of return holes 620 corresponds to a slide vane groove 221 of the cylinder in the up-down direction.

The cylinder has the slide vane groove 221, and the pump assembly 200 also includes a slide vane that can slide in the slide vane groove 221. By providing one return hole 620 corresponding to the slide vane groove 221 and located above the slide vane groove 221, the lubricating oil falling through the return hole 620 may directly penetrate into the slide vane groove 221, lubricating a friction pair between the slide vane and the slide vane groove 221. As a result, the lubricating effect is improved, and operation stability of the pump assembly 200 is further enhanced.

In some embodiments, as illustrated in FIG. 4 and FIG. 5, one of the plurality of return holes 620 may correspond to the slide vane groove 221 of the upper cylinder 220 in the up-down direction. The return hole 620 corresponding to the slide vane groove 221 of the cylinder may be connected to an inner hole of the oil stabilizing ring 600.

In some embodiments, the return hole 620 corresponding to the slide vane groove 221 of the upper cylinder 220 may be spaced apart from an inner ring of the oil stabilizing ring 600, which is not specifically limited herein.

According to some embodiments of the present disclosure, as illustrated in FIG. 1 to FIG. 4, and FIG. 6, the pump assembly 200 further includes an upper bearing 210 mounted at an upper surface of the cylinder. The oil stabilizing ring 600 is located above the upper bearing 210. The upper bearing 210 has a communication hole 211 that is offset from the return hole 620 in the up-down direction.

In some embodiments, the upper bearing 210 is constructed in a ring shape, which can reduce turbulence of a surface of the oil sump to a certain extent. In some embodiments, an outer circumferential edge of the upper bearing 210 may be fixedly connected to the inner wall of the housing 100 to improve mounting strength of the upper bearing 210. In some embodiments, an outer diameter of the upper bearing 210 is the same as a maximum outer diameter of the oil stabilizing ring 600. In some embodiments, the outer circumferential edge of the upper bearing 210 may be spaced apart from the inner wall of the housing 100, and the upper bearing 210 may be fixedly connected to the cylinder. In some embodiments, the maximum outer diameter of the oil stabilizing ring 600 is set to be not smaller than the outer diameter of the upper bearing 210.

The communication hole 211 is provided at the upper bearing 210 to meet a lightweight design of the upper bearing 210, reduce a weight of the upper bearing 210, and facilitate the return of the lubricating oil to the oil sump through the communication hole 211. However, due to arrangement of the communication hole 211, the lubricating oil may overflow upward through the communication hole 211 during the operation of the compressor 10, which is not conducive to the stability of the surface of the oil sump. By offsetting the return hole 620 at the oil stabilizing ring 600 from the communication hole 211 in the up-down direction, the lubricating oil is prevented from overflowing through the communication hole 211 to the upper surface of the oil stabilizing ring 600, improving the stability of the surface of the oil sump.

The upper bearing 210 may have a plurality of communication holes 211 at the upper bearing 210. The plurality of communication holes 211 may be arranged at intervals in a circumferential direction of the upper bearing 210, which improves a lightweight effect while meeting a design of structural strength. Exemplarily, as illustrated in FIG. 6, the communication hole 211 may be constructed in a strip shape extending in an axial direction of the upper bearing 210 to increase a flow area.

In some embodiments, as illustrated in FIG. 4 and FIG. 5, spacings of at least two pairs of adjacent return holes 620 are differently set; and/or, at least two return holes 620 are different in dimension. In this way, the plurality of return holes 620 are irregularly arranged in the circumferential direction of the oil stabilizing ring 600. Accordingly, the communication hole 211 of the upper bearing 210 is also irregularly arranged to improve the return efficiency and reduce the likelihood of the generation of the eddy current.

According to some embodiments of the present disclosure, as illustrated in FIG. 1 to FIG. 3, the pump assembly 200 may further include a muffler 270. The muffler 270 may be used to reduce discharge noise of the pump assembly 200. The muffler 270 may be mounted at a side of the upper bearing 210 facing away from the cylinder, that is, the muffler 270 is disposed at the side of the upper bearing 210 adjacent to the motor 300.

The upper bearing 210 may have a discharge passage 212. The discharge passage 212 may be in communication with the cylinder. Compressed air generated during the rotation of the crankshaft 260 is discharged through the discharge passage 212 of the upper bearing 210. The muffler 270 may cover the discharge passage 212 of the upper bearing 210, in such a manner that the discharged gas enters the muffler 270. The muffler 270 may have a discharge port to facilitate discharging the compressed gas generated by the pump assembly 200.

In some embodiments, a discharge hole of the muffler 270 may be provided at an upper surface of the muffler 270 to facilitate the discharged gas to be discharged through the discharge pipe 400 at an upper end of the housing 100. A plurality of discharge holes may be provided to improve discharge efficiency.

The oil stabilizing ring 600 may be disposed around the muffler 270. The inner ring of the oil stabilizing ring 600 may be spaced apart from the muffler 270. In some embodiments, the oil stabilizing ring 600 is disposed around the muffler 270, and the upper surface of the oil stabilizing ring 600 is disposed lower than the discharge port of the muffler 270, to prevent the oil stabilizing ring 600 from affecting the discharge of the muffler 270 and improve a discharge effect. By arranging the oil stabilizing ring 600 to be spaced apart from the muffler 270, assembly of the oil stabilizing ring 600 is facilitated and an assembly difficulty is reduced.

According to some embodiments of the present disclosure, as illustrated in FIG. 3, a thickness of the oil stabilizing ring in the up-down direction is W1, and a thickness of a main body portion of the upper bearing 210 in the up-down direction is W2, where 3 mm≤W1≤W2.

In some embodiments, by limiting the thickness of the oil stabilizing ring 600, the oil stabilizing ring 600 may have sufficient structural strength while not being excessively thick to increase a production cost and reduce a space utilization rate.

In some embodiments, the upper bearing 210 functions to support the crankshaft 260 and maintain stable rotation of the crankshaft 260. Therefore, the upper bearing 210 can serve as a reference for a main support part in the compressor 10. A thickness of a main body portion of the upper bearing 210 determines support strength of the upper bearing 210, and may serve as an upper limit for the thickness of the oil stabilizing ring 600. It should be noted that the thickness of the main body portion of the upper bearing 210 refers to a thickness of an outer ring of the upper bearing 210 in a radial direction.

In some embodiments, W2 may be 9 mm, and W1 ranges from 3 mm to 9 mm. In some embodiments of the present disclosure, W1 may be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or other values ranging from 3 mm to 9 mm, which is not limited herein.

According to some embodiments of the present disclosure, a cross-section of the return hole 620 in the radial direction is circular, elliptical, or polygonal. In some embodiments, a cross-sectional shape of the return hole 620 in the radial direction is not limited, and may be one of circular, elliptical, or polygonal. The polygon may be a triangle, a rectangle, etc. In this way, the likelihood of the generation of the eddy current is reduced, and the return efficiency of the lubricating oil is improved. Exemplarily, as illustrated in FIG. 4 and FIG. 5, the return hole 620 may be circular or in an elongated shape extending in the circumferential direction of the oil stabilizing ring 600.

According to some embodiments of the present disclosure, a dimension of the cross-section of the return hole 620 in a radial direction varies along the axial direction; or the return hole 620 may have a cylindrical shape. In some embodiments, a cross-sectional shape of the return hole 620 in the axial direction is not limited. In some embodiments, the return hole 620 may be a vertical oil hole having the cylindrical shape. In some embodiments, the dimension of the cross-section of the return hole 620 in the radial direction may vary along the axial direction, such as a tapered oil hole.

According to some embodiments of the present disclosure, as illustrated in FIG. 1, a height of the housing 100 in the up-down direction is H. It should be noted that, a spacing between the upper surface of the oil stabilizing ring 600 and an upper surface of the housing 100 is H1, where ⅖≤H1/H≤ 7/10.

In some embodiments, H may be a spacing between an upper surface of the upper housing 120 and a lower surface of the lower housing 130, and H1 may be a spacing between the upper surface of the oil stabilizing ring 600 and the upper surface of the upper housing 120. It should be understood that, when the compressor 10 is not operating, the lubricating oil in the oil sump is static. When the compressor 10 is operating, the lubricating oil in the oil sump is driven by the crankshaft 260 and becomes dynamic, with part of the lubricating oil moving upward, causing the liquid level of the lubricating oil in the oil sump to drop. To enable the oil stabilizing ring 600 to effectively suppress the fluctuation of the surface of the oil sump when the compressor 10 is in the operating state, a relationship between H and H1 is defined. In this way, a height position of the oil stabilizing ring 600 in the housing 100 is located below an oil surface of the static lubricating oil. When the compressor 10 is in the operating state, the oil stabilizing ring 600 is located at an oil surface of the dynamic lubricating oil, which functions to suppress the fluctuation of the liquid level in the oil sump.

In some embodiments, ⅖≤H1/H≤⅗ may be satisfied.

According to some embodiments of the present disclosure, the motor 300 may be spaced apart from an inner side wall of the housing 100. When the compressor 10 is in the operating state, driven by the crankshaft 260 and airflow, part of the lubricating oil in the oil sump may be carried to an upper space of the motor 300. To facilitate rapid return of the lubricating oil in the upper space of the motor 300, the motor 300 is spaced apart from the inner side wall of the housing 100, in such a manner that the lubricating oil can flow back downward along a gap between the motor 300 and the inner side wall of the housing 100, improving the return efficiency.

In some embodiments of the present disclosure, a refrigeration device is further provided. The refrigeration device includes the compressor 10 according to any one of the above embodiments. The refrigeration device in some embodiments may be a split air conditioner, a central air conditioner, etc., or a refrigerator, a freezer, etc., or an air-energy water heater, a floor heating system, etc.

Since the refrigeration device adopts all the technical solutions of the compressor 10 of the above embodiments, the refrigeration device has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

According to the refrigeration device of the present disclosure, by using the compressor 10 according to any one of the above embodiments, the operation stability and a refrigeration effect of the refrigeration device are auxiliary improved.

In some embodiments of the present disclosure, an oil stabilizing ring 600 is further provided. The oil stabilizing ring 600 is applied to the compressor 10. As illustrated in FIG. 5, the outer circumferential edge of the oil stabilizing ring 600 has the notch 610 recessed towards the axis of the oil stabilizing ring 600. The oil stabilizing ring 600 is adapted to be spaced apart from the inner wall of the housing 100 of the compressor 10 at the position where the notch 610 is provided. The outer circumferential edge of the oil stabilizing ring 600 is adapted to be connected to the inner wall of the housing 100 of the compressor 10 at the position where the notch 610 is not provided.

According to the oil stabilizing ring 600 provided in the embodiments of the present disclosure, the notch 610 is provided at the outer circumferential edge of the oil stabilizing ring 600, which facilitates the lubricating oil at the inner wall of the housing 100 to flow back downward through the oil stabilizing ring 600. In this way, the return efficiency of the lubricating oil in the compressor 10 is improved, and the operation stability and performance of the compressor 10 are improved.

The oil stabilizing ring 600 may have the plurality of notches 610, which are arranged at intervals in the circumferential direction of the oil stabilizing ring 600. The spacing among the plurality of notches 610, and the shape and the dimension of each notch 610 may be irregularly arranged.

The oil stabilizing ring 600 may have the return hole 620 extending through the oil stabilizing ring 600 in a thickness direction. The plurality of return holes 620 may be provided and arranged at intervals in the circumferential direction of the oil stabilizing ring 600. The spacing among the plurality of return holes 620, and the cross-sectional shape and cross-sectional dimension of each return hole 620 in the radial direction may be irregularly arranged.

It should be noted that terms “first” and “second” in the specification and claims of the present disclosure are used to distinguish similar objects, rather than to describe a specific sequence or order. It should be understood that data as used can be interchanged where appropriate, to enable the embodiments of the present disclosure described herein to be implemented in an order other than that illustrated or described herein. Also, the objects distinguished by the terms such as “first” and “second” are usually objects of the same type. The quantity of the objects is not limited. For example, one or a plurality of first objects may be provided. In addition, “and/or” throughout the specification and appended claims indicates at least one of the objects associated with “and/or”. The character “/” generally indicates that the associated objects before and after the character are in an “or”relationship.

In the description of the present disclosure, it should be understood that the orientation or the position indicated by terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “over”, “below”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “anti-clockwise”, “axial”, “radial”, and “circumferential” should be construed to refer to the orientation or the position as shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure.

In the description of the present disclosure, the “first feature” and the “second feature”may include one or more of these features.

In the description of the present disclosure, “plurality”means at least two.

In the description of the present disclosure, the first feature “on” or “under” the second feature may mean that the first feature is in direct contact with the second feature, or the first and second features are in indirect contact through another feature between them.

In the description of the present disclosure, the first feature “above” the second feature means that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than that of the second feature. In the description of the present disclosure, reference throughout this specification to “an embodiment”, “some embodiments”, “an illustrative embodiment”, “an example”, “a specific example”, or “some examples” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. The appearances of the above phrases in various places throughout this specification are not necessarily referring to the same embodiment or example. Further, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Although embodiments of the present disclosure have been illustrated and described, it is conceivable for those skilled in the art that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure. The scope of the present disclosure shall be defined by the claims and their equivalents.