Compressor oil return structure, compressor and air conditioner

Abstract

The present invention provides a compressor oil return structure, a compressor, and an air conditioner, wherein the compressor oil return structure comprises: a cover, a shell, a drive unit, and a compression unit, wherein the cover and the shell are connected to form a hollow cavity, the drive unit and the compression unit are located in the hollow cavity, an oil storage cavity is provided between the drive unit and the compression unit, the oil discharged by the compression unit can enter the oil storage cavity, a first cavity for air intake is provided in the hollow cavity, and the gas sucked into the first cavity can move through the outer wall of the oil storage cavity, and the outer wall of the oil storage cavity can exchange heat with the gas in the first cavity. This can overcome the defects of the prior art oil return lubrication structure in that the high-temperature lubricating oil after centrifugal separation of the exhaust gas is directly returned to the lubrication parts inside the compressor, resulting in high lubricating oil temperature and poor lubrication effect.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor oil return structure, a compressor and an air conditioner. Background Art

[0002] The aluminum alloy scroll compressor for automobiles does not have a stable oil pool inside the compressor to supply oil to the mechanical lubrication parts of the compressor's internal oil pumping system. Instead, it relies on the compressor's suction refrigerant to carry the lubricating oil, and the exhaust gas centrifugal separation of the refrigerant and lubricating oil is followed by a throttling return oil design for the lubricating oil. Therefore, the oil return efficiency of the exhaust gas centrifugal separation is crucial to the performance and reliability of the compressor. The existing centrifugal separation structure is very mature, and the simple centrifugal separation structure has a high separation efficiency, which can fully meet the requirements of separating most of the lubricating oil from the refrigerant. However, with regard to the return of the separated lubricating oil to the compressor, the existing technical solutions all have major problems, mainly focusing on:

[0003] 1. The oil return lubrication structure of the existing technology directly returns the high-temperature lubricating oil after centrifugal separation of the exhaust gas to the lubrication parts inside the compressor. The lubricating oil temperature is high and the lubrication effect is poor;

[0004] 2. The position of the oil return storage structure is unreasonable: the oil storage chamber and the centrifugal separation structure are arranged in parallel, so the maximum liquid level of the oil storage chamber can only reach the bottom height of the centrifugal separation structure. Otherwise, the liquid will enter the exhaust pipe from the bottom inlet of the centrifugal separator. Therefore, the oil storage chamber space of this structure cannot be fully utilized. In addition, the oil storage structure is easily affected by the centrifugal separation structure, resulting in a small amount of oil stored in the actual oil storage structure or the separated lubricating oil being carried away by the refrigerant;

[0005] 3. The oil return structure directly adopts a throttling structure to connect the high-pressure to the low-pressure or medium-pressure lubrication parts. Due to the large throttling pressure difference, when there is a large pressure difference during actual operation, the throttling is insufficient, resulting in high-pressure gas entering the low-pressure or medium-pressure parts, affecting the performance of the compressor; under small pressure difference conditions, the return flow is too small, and the lubricating oil separated by the centrifugal separation structure cannot be returned to the compressor in time. The excess lubricating oil in the separation structure is carried away by the refrigerant again, resulting in poor heat exchange effect of the system.

[0006] Patent No. US6511530B2 discloses a structure for separating and storing exhaust oil inside a compressor. An exhaust chamber 13a, an oil-gas separation chamber, and a lubricating oil storage chamber are provided between the back of the compressor's fixed scroll and the exhaust cover. The oil storage chamber returns to the compressor's internal suction chamber through an oil return channel, enabling the lubricating oil to circulate inside the compressor. However, there are the following problems: in order not to affect the oil separation efficiency of the separation chamber, the oil storage chamber must be located below the oil return chamber (in the direction of gravity) and the maximum liquid level in the oil storage chamber must be lower than the oil return chamber outlet. Otherwise, the lubricating oil enters the separation chamber and affects the oil separation effect. Therefore, the problem with this type of oil storage chamber technology is that the oil storage volume is small, and excess lubricating oil will still be carried into the refrigeration system by the refrigerant. Otherwise, in order to increase the volume of the oil storage chamber, the axial height of the oil storage chamber needs to be increased, resulting in problems such as large compressor size, heavy weight, and high production costs. At the same time, the pressure in this type of oil storage chamber is the exhaust high pressure. Affected by the exhaust fluctuations of the pump body, the exhaust pressure fluctuates greatly, making it difficult to stabilize the liquid level in the oil storage chamber and also fluctuating greatly with the exhaust.

[0007] Patent number CN107605726A discloses another oil return structure. The oil return passage in the compressor exhaust cover connects the stator and bracket, and a throttling channel is set in the bracket. The lubricating oil in the oil return passage is introduced into the lubrication cavity in the bracket to achieve lubrication of the bearings in the lubrication cavity. Although the lubricating oil is directly introduced into the key lubricating components in the compressor, the lubrication cavity is a accommodating cavity with limited space. Most of the lubricating oil in the oil return passage cannot be returned to the compressor in time, resulting in a large amount of lubricating oil entering the refrigeration system with the exhaust gas, affecting the heat exchange effect of the system. Summary of the Invention

[0008] Therefore, the present invention provides a compressor oil return structure, a compressor and an air conditioner, which can overcome the defects of the prior art oil return lubrication structure that the high-temperature lubricating oil after centrifugal separation of the exhaust gas directly returns to the lubrication parts inside the compressor, resulting in high lubricating oil temperature and poor lubrication effect.

[0009] In order to solve the above problems, the present invention provides a compressor oil return structure, including: a cover body, a shell, a drive unit and a compression unit, the cover body is connected to the shell to form a hollow cavity, the drive unit and the compression unit are located in the hollow cavity, an oil storage cavity is provided between the drive unit and the compression unit, the oil discharged by the compression unit can enter the oil storage cavity, a first cavity for air intake is provided in the hollow cavity, and the gas sucked into the first cavity can move through the outer wall of the oil storage cavity, and the outer wall of the oil storage cavity can generate heat exchange with the gas in the first cavity.

[0010] In some embodiments, the drive unit includes a drive motor and a crankshaft; the compressor oil return structure also includes a bracket, the oil storage chamber is arranged in the bracket, a second cavity is enclosed between the bracket and the crankshaft, and the oil storage chamber is located radially outside the second cavity.

[0011] In some embodiments, an oil return cavity is provided in the cover body, and the oil storage cavity can be communicated with the oil return cavity.

[0012] In some embodiments, the bracket is located in the first cavity; the compression unit includes a static plate and a dynamic plate, a third cavity is provided between the static plate and the bracket, a compression chamber is provided between the static plate and the dynamic plate, the third cavity is connected to the compression chamber, and the dynamic plate can provide power for the gas in the first cavity so that the gas enters the compression chamber through the third cavity.

[0013] In some embodiments, the oil storage chamber can be connected to the oil return chamber through an oil inlet channel; the oil inlet channel includes a first channel and a second channel, the first channel is arranged on the bracket, and the second channel is arranged on the stator, one end of the first channel is connected to the oil storage chamber, and the other end is connected to the second channel, and the second channel is connected to the oil return chamber.

[0014] In some embodiments, a first gasket is provided between the moving disc and the bracket, and a connecting channel b is provided on the first gasket, one end of the connecting channel b is connected to the second channel, and the other end is connected to the first channel, and a throttling structure is provided in any one or more of the connecting channel b, the second channel and the first channel to create a pressure difference between the pressure in the oil storage chamber and the pressure in the oil return chamber.

[0015] In some embodiments, an oil drain channel b is provided on the oil storage chamber, one end of the oil drain channel b is connected to the third cavity, and the other end is connected to the oil storage chamber; the oil drain channel b includes a fourth channel and a throttling channel a, the fourth channel is provided on the bracket, and the throttling channel a is provided on the first gasket, one end of the throttling channel a is connected to the fourth channel, and the other end is connected to the third cavity.

[0016] In some embodiments, the oil discharge channel b also includes a throttling channel c, which is arranged on the bracket, one end of the throttling channel c is connected to the oil storage chamber, and the other end is connected to the fourth channel. A throttling component is provided in the throttling channel c, and the throttling component can throttle and reduce the pressure of the oil in the throttling channel c, so that a pressure difference is generated between the oil storage chamber and the third cavity.

[0017] In some embodiments, the bracket is provided with an opening on a side facing the drive motor, and the opening is connected to the oil storage chamber; the compressor oil return structure also includes a first cover plate, which is provided at the opening so that the oil storage chamber can be sealed by the first cover plate.

[0018] In some embodiments, an oil drain channel a is provided on the first cover plate, one end of the oil drain channel a is connected to the oil storage chamber, and the other end is connected to the first cavity; the oil drain channel a includes an oil drain groove and a third channel, the oil drain groove is provided on the end surface of the first cover plate, and the third channel is provided on the side wall of the first cover plate, and the third channel is connected to the oil drain groove. After the first cavity inhales gas, the gas can drive the oil discharged from the oil drain channel a to move.

[0019] In some embodiments, the first cover plate and the bracket are connected via a locking member, and a sealing member is provided on the locking member, and the sealing member can seal the first cover plate and the bracket.

[0020] In some embodiments, the second cavity is in communication with the oil storage cavity, so that the pressure in the second cavity is the same as the pressure in the oil storage cavity.

[0021] In some embodiments, an eighth channel is provided on the crankshaft along the axial direction of the crankshaft, one end of the eighth channel is connected to the second cavity, and the other end passes through the end of the crankshaft away from the moving plate.

[0022] In some embodiments, a seventh channel is provided on the movable disk, one end of the seventh channel is connected to the second cavity, and the other end of the seventh channel is connected to the compression cavity.

[0023] In some embodiments, a second cover plate is provided in the oil storage cavity, and the second cover plate divides the space of the oil storage cavity into an oil storage chamber and a buffer cavity. A connecting hole is provided on the second cover plate, and one end of the connecting hole is connected to the oil storage chamber and the other end is connected to the buffer cavity.

[0024] In some embodiments, the buffer cavity and the second cavity are connected through a sixth channel.

[0025] In some embodiments, a fifth channel is provided on the bracket, a ninth channel is provided on the stator plate, and a first through hole is also provided on the stator plate. The first through hole is connected to the compression chamber. One end of the ninth channel is connected to the first through hole and the other end is connected to the fifth channel. The fifth channel is connected to the buffer chamber.

[0026] In some embodiments, a fixing member is further included, which is connected between the inner wall and the outer wall of the bracket, and there are multiple fixing members, which are arranged at intervals along the circumference of the bracket, so that the oil storage chamber can be divided into several cavities through the fixing members.

[0027] In some embodiments, the bracket is provided with an opening on one side of the moving disk, and the opening is connected to the oil storage chamber; the compressor oil return structure also includes a third cover plate, and the third cover plate is provided at the opening so that the oil storage chamber can be sealed by the third cover plate.

[0028] In some embodiments, the oil storage chamber has a twelfth channel, one end of the twelfth channel is connected to the oil storage chamber, and the other end is connected to the oil return chamber; the twelfth channel includes a fourteenth channel, an oil inlet hole and a thirteenth channel, the fourteenth channel is arranged on the bracket, the fourteenth channel is connected to the oil storage chamber, the oil inlet hole is arranged on the third cover plate, the thirteenth channel is arranged on the stator plate, one end of the oil inlet hole is connected to the thirteenth channel, the other end is connected to the thirteenth channel, and the thirteenth channel is connected to the oil return chamber.

[0029] In some embodiments, a second gasket is provided between the third cover plate and the movable plate, and a sixteenth channel is provided on the second gasket, and one end of the sixteenth channel is connected to the oil inlet hole, and the other end is connected to the thirteenth channel.

[0030] In some embodiments, the oil storage chamber has an eighteenth channel, one end of the eighteenth channel is connected to the third cavity, and the other end is connected to the oil storage chamber;

[0031] The eighteenth channel includes an oil drain channel C, a tenth channel, an eleventh channel, and a fifteenth channel. The oil drain channel C is arranged on the bracket. The eleventh channel is arranged on the third cover plate. The eleventh channel is connected to the oil drain channel C through the tenth channel. The tenth channel is arranged in the third cover plate. The fifteenth channel is arranged on the second gasket. One end of the fifteenth channel is connected to the third cavity, and the other end is connected to the eleventh channel.

[0032] In some embodiments, the housing includes a second housing and a first housing, the first housing and the second housing adopt an integrated structure, the first housing can support the compression unit, and the oil storage chamber is arranged in the first housing.

[0033] The present invention also provides a compressor, comprising the above-mentioned compressor oil return structure.

[0034] The present invention also provides an air conditioner comprising the above-mentioned compressor.

[0035] The present invention provides a compressor oil return structure, compressor, and air conditioner. An oil storage chamber is provided between the drive unit and the compression unit. The oil storage chamber is not subject to centrifugal separation and will not be carried away by refrigerant, ensuring the utilization rate of the oil storage chamber space. The gas drawn into the first cavity moves through the outer wall of the oil storage chamber. As the low-temperature refrigerant flows outside the oil storage chamber, the high-temperature oil-gas mixture discharged from the stator is separated in the oil return chamber to obtain high-temperature lubricating oil. After the high-temperature lubricating oil flows from the oil return chamber into the oil storage chamber, the low-temperature refrigerant outside the oil storage chamber cools the high-temperature lubricating oil in the oil storage chamber. A portion of the cooled lubricating oil is discharged into the first cavity and, driven by the gas, enters the lubricating parts of the compressor, forming an oil return structure. The oil storage chamber stores the returned high-temperature lubricating oil and, by being positioned near a low-temperature area, allows the low-temperature refrigerant to cool the high-temperature lubricating oil in the oil storage chamber before returning to other parts to be lubricated within the compressor. This lowers the temperature of the lubricating oil, removing more heat from the lubricating parts, greatly improving the lubricating effect of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of the first prior art;

[0037] Figure 2 It is a structural diagram of the second prior art;

[0038] Figure 3 This is a structural schematic diagram of a compressor oil return structure according to an embodiment of the present invention;

[0039] Figure 4 This is a partial enlarged view of the oil return structure of the compressor according to an embodiment of the present invention;

[0040] Figure 5 This is a structural schematic diagram of a bracket in a compressor oil return structure according to an embodiment of the present invention;

[0041] Figure 6 This is a structural schematic diagram of the first cover plate in the compressor oil return structure according to an embodiment of the present invention;

[0042] Figure 7 This is an assembly projection diagram of the bracket and the first cover plate in the compressor oil return structure according to an embodiment of the present invention;

[0043] Figure 8 This is a structural schematic diagram of a compressor oil return structure according to another embodiment of the present invention;

[0044] Figure 9 Schematic diagram of the layout of locking members in a compressor oil return structure according to another embodiment of the present invention;

[0045] Figure 10 A partial enlarged view of a compressor oil return structure according to another embodiment of the present invention;

[0046] Figure 11 A schematic structural diagram of a throttling member in a compressor oil return structure according to another embodiment of the present invention;

[0047] Figure 12 is a cross-sectional view of a throttling member in a compressor oil return structure according to another embodiment of the present invention;

[0048] Figure 13 This is a schematic structural diagram of a buffer chamber in a compressor oil return structure according to another embodiment of the present invention;

[0049] Figure 14 This is a structural schematic diagram of a second cover plate in a compressor oil return structure according to another embodiment of the present invention;

[0050] Figure 15 Schematic diagram of the structure of the oil discharge channel c in the oil return structure of the compressor according to another embodiment of the present invention;

[0051] Figure 16 This is a structural schematic diagram of a sealing cover plate oil discharge channel 1 in a compressor oil return structure according to another embodiment of the present invention;

[0052] Figure 17 This is an assembly diagram of a bracket and a third cover plate in a compressor oil return structure according to another embodiment of the present invention;

[0053] Figure 18 This is an assembly diagram of the first casing and the second casing in the compressor oil return structure according to another embodiment of the present invention.

[0054] The reference numerals indicate:

[0055] Among them, 1. Cover (upper cover); 2. Static plate; 201. Second channel; 202. First through hole; 203. Ninth channel; 204. Thirteenth channel; 3. Moving plate; 301. Seventh channel; 4. Bracket; 401. Fixing member; 402. Oil drain channel C; 403. First channel; 404. Fourth channel; 405. Fourteenth channel; 5. Housing; 6. Drive motor; 7. Crankshaft; 701. Eighth channel; 702 , crankshaft throttle hole; 8, housing air intake; 9, first cavity; 10, oil storage chamber; 101, oil discharge channel a; 102, sixth channel; 103, oil inlet channel; 104, oil discharge channel b; 105, throttle channel c; 1001, oil inlet buffer chamber a; 1002, oil collecting chamber; 1003, oil inlet buffer chamber b; 1004, pressure maintaining chamber; 1005, buffer chamber; 11, second cavity; 12, third cavity; 13 , compression chamber; 14, exhaust chamber; 15, oil return chamber; 151, oil return chamber oil discharge channel; 152, oil return chamber air inlet channel; 16, compressor exhaust port; 17, first cover plate; 171, sealing fitting part a; 172, sealing fitting part b; 173, oil drain groove; 174, third channel; 18, first gasket; 181, connecting channel b; 182, throttling channel a; 19, bearing a; 20, bearing b; 21, throttling element ; 211, peripheral oil outlet channel; 212, internal oil outlet channel; 22, second cover plate; 221, connecting hole; 23, third cover plate; 231, tenth channel; 232, eleventh channel; 233, oil inlet hole; 24, first housing; 25, second housing; 26, locking piece; 27, sealing piece; 28, oil outlet hole; 29, fifth channel; 30, second gasket; 3001, fifteenth channel; 3002, sixteenth channel. DETAILED DESCRIPTION

[0056] See also Figure 1 As shown, the compressor mechanism of prior art a mainly includes a compressor cover body 1, a stator 2, a rotor 3 and a bracket 4. An exhaust chamber 14, an oil return chamber 15 and an oil storage chamber 10 are formed between the compressor stator 2 and the cover body 1. The oil storage chamber 10 is relatively arranged below the oil return chamber 15. The highest oil storage level in the oil storage chamber 10 corresponds to the oil outlet 28 at the bottom of the oil return chamber 15. The oil storage chamber 10 of the prior art is set in the high-temperature exhaust area. The lubricating oil in the oil storage chamber 10 is the exhaust high temperature. The high-temperature oil directly enters the lubrication part after throttling, resulting in a decrease in the lubrication effect. At the same time, the structural position setting of the exhaust chamber 14, the oil return chamber 15 and the oil storage chamber 10 requires the cover body 1 to be set very large, resulting in a large size and heavy weight of the compressor. The axial oil separation length of the oil return chamber 15 is limited, resulting in a decrease in the actual oil separation efficiency.

[0057] See also Figure 2As shown, the compressor of prior art b includes a housing 5, a bracket 4, a moving plate 3, a static plate 2, a cover body 1 and a drive motor 6. By arranging an oil return channel in the compressor cover body 1, the static plate 2 and the bracket 4, the lubricating oil separated by the exhaust oil separation structure of the cover body 1 is returned to the two bearings in the second cavity 11 (bearing lubrication cavity) in the bracket 4. Since the high-temperature lubricating oil of the exhaust gas directly enters the lubricating components after throttling, the lubrication effect is reduced. At the same time, since the second cavity 11 (bearing lubrication cavity) is a space for accommodating moving parts, the cavity space is limited, and there are moving parts eccentric sleeves and moving plates 3, which affect the oil storage capacity of the cavity, resulting in the separated lubricating oil not being able to be completely stored in the compressor, and the excess lubricating oil will still be carried away by the exhaust gas into the system, affecting the heat exchange of the system.

[0058] See also Figure 3-18 As shown, according to an embodiment of the present invention, a compressor oil return structure is provided, including: a cover body 1, a shell 5, a drive unit and a compression unit, the cover body 1 is connected to the shell 5 to form a hollow cavity, the drive unit and the compression unit are located in the hollow cavity, an oil storage cavity 10 is provided between the drive unit and the compression unit, the oil discharged by the compression unit can enter the oil storage cavity 10, a first cavity 9 for air intake is provided in the hollow cavity, and the gas sucked into the first cavity 9 can move through the outer wall of the oil storage cavity 10, and the outer wall of the oil storage cavity 10 can generate heat exchange with the gas in the first cavity 9. Specifically, the housing 5 is provided with a first cavity 9 for air intake, and the gas absorbed into the first cavity 9 can move through the outer wall of the oil storage cavity 10. The oil storage cavity 10 can be connected to the first cavity 9. The oil-gas mixture discharged from the compression unit can be separated into oil and gas within the cover 1. The separated oil can enter the oil storage cavity 10. The outer wall of the oil storage cavity 10 can exchange heat with the gas in the first cavity 9. At least part of the oil in the oil storage cavity 10 can flow into the first cavity 9, and the gas can drive the oil in the first cavity 9 to move.

[0059] See also Figure 3As shown, an oil separation structure is provided in the oil return chamber 15, the cover body 1 and the shell 5 are both hollow structures, and the cover body 1 and the shell 5 are connected to form a shell with a hollow cavity structure. A movable plate 3 is provided between the stator plate 2 and the bracket 4, and a crankshaft 7 is rotatably connected to the bracket 4. The crankshaft 7 can drive the movable plate 3 to move, so that the movable plate 3 cooperates with the stator plate 2 to produce a compression effect. A drive motor 6 is provided on the crankshaft 7, and the drive motor 6 can drive the crankshaft 7 to rotate. A shell air intake port 8 is also provided on the shell 5, and the shell air intake port 8 is located away from the stator plate 2 and close to the stator plate 2. Near the end of the crankshaft 7 away from the bracket 4, the first cavity 9 is located near the housing suction port 8, the cover body 1 is provided with a compressor exhaust port 16, the compressor exhaust port 16 is connected to the oil return chamber 15, the exhaust chamber 14 is above the exhaust port of the stator 2, the exhaust chamber 14 and the oil return chamber 15 are connected through the oil return chamber intake channel 152, the oil return chamber intake channel 152 is provided on the cover body 1, a pump body compression chamber 13 is provided between the movable plate 3 and the stator 2, and a third cavity 12 (pump body suction chamber) is also provided between the movable plate 3 and the stator 2. Figure 3 The dynamic plate 3 and the static plate 2 are arranged on the right side of the driving motor 6, and the lubricating oil then flows from left to right with the refrigerant. The refrigerant (refrigerant) after cooling the motor reaches the oil storage chamber 10 on the right side of the driving motor 6, cools the lubricating oil in the oil storage chamber 10, and finally reaches the third cavity 12. Under the action of the third cavity 12, it enters the pump body compression chamber 13, and reaches the exhaust chamber 14 after compression is completed. The lubricating oil and the refrigerant are separated in the oil return chamber 15, and the separated lubricating oil enters the oil storage chamber 10 from the oil inlet channel 103. Finally, the lubricating oil in the oil storage chamber 10 is discharged into the first cavity 9, and enters the lubrication part inside the compressor driven by the gas in the first cavity 9, thereby realizing the storage and circulation of the lubricating oil inside the compressor. In this technical solution, an oil storage chamber 10 is provided between the drive unit and the compression unit. The gas sucked into the first cavity 9 can move through the outer wall of the oil storage chamber 10. As the low-temperature refrigerant flows through the outside of the oil storage chamber 10, the high-temperature oil-gas mixture discharged from the stator 2 is separated in the oil return chamber 15 to obtain high-temperature lubricating oil. After the high-temperature lubricating oil flows from the oil return chamber 15 into the oil storage chamber 10, the low-temperature refrigerant outside the oil storage chamber 10 cools the high-temperature lubricating oil in the oil storage chamber 10. A portion of the cooled lubricating oil is discharged into the first cavity 9 and, driven by the gas, enters the lubrication part of the compressor, forming an oil return structure. The oil storage chamber 10 stores the refluxed high-temperature lubricating oil and is arranged close to the low-temperature area so that the low-temperature refrigerant cools the high-temperature lubricating oil in the oil storage chamber 10 before returning to other parts to be lubricated inside the compressor. The temperature of the lubricating oil is reduced, taking away more heat from the lubricating parts, which can greatly improve the lubricating effect of the lubricating oil.

[0060] In a specific embodiment, the drive unit includes a drive motor 6 and a crankshaft 7; the compressor oil return structure also includes a bracket 4, the oil storage chamber 10 is arranged in the bracket 4, and a second cavity 11 is enclosed between the bracket 4 and the crankshaft 7, and the oil storage chamber 10 is located radially outside the second cavity 11. In this technical solution, since the low-temperature refrigerant flows through the outside of the bracket 4, the high-temperature oil and gas mixture discharged from the stator 2 is separated in the oil return chamber 15 to obtain high-temperature lubricating oil. After the high-temperature lubricating oil flows from the oil return chamber 15 into the oil storage chamber 10, the low-temperature refrigerant outside the bracket 4 cools the high-temperature lubricating oil in the oil storage chamber 10. After a part of the cooled lubricating oil is discharged, it contacts the low-temperature refrigerant flowing through, undergoes secondary cooling, and flows with the low-temperature refrigerant into the lubrication part in the compressor to complete the lubrication effect.

[0061] In a specific embodiment, an oil return chamber 15 is provided in the cover body 1, the oil storage chamber 10 can be communicated with the oil return chamber 15, and the bracket 4 is located in the first cavity 9; the compression unit includes a stator 2 and a movable plate 3, a third cavity 12 is provided between the stator 2 and the bracket 4, a compression chamber 13 is provided between the stator 2 and the movable plate 3, the third cavity 12 is communicated with the compression chamber 13, and the movable plate 3 can provide power for the gas in the first cavity 9 so that the gas enters the compression chamber 13 through the third cavity 12. In this technical solution, the oil return chamber 15 is connected to the exhaust chamber 14. As the low-temperature refrigerant flows through the outside of the bracket 4, the high-temperature oil-gas mixture discharged from the stator 2 is separated in the oil return chamber 15 to obtain high-temperature lubricating oil. After the high-temperature lubricating oil flows from the oil return chamber 15 into the oil storage chamber 10, the low-temperature refrigerant outside the bracket 4 cools the high-temperature lubricating oil in the oil storage chamber 10. A portion of the cooled lubricating oil is discharged and contacts the low-temperature refrigerant flowing through. After secondary cooling, it flows with the low-temperature refrigerant into the lubrication part in the compressor to complete the lubrication effect. It is then discharged through the exhaust port of the stator 2 and into the oil return chamber 15. After the gas-liquid separation is completed in the oil return chamber 15, it flows into the oil storage chamber 10 to form an oil return structure. The oil in the oil return chamber 15 can enter the oil storage chamber 10. After the first cavity 9 inhales the gas, the outer wall of the oil storage chamber 10 can exchange heat with the gas to exchange heat with the oil in the oil storage chamber 10.

[0062] In a specific embodiment, the oil storage chamber 10 can be connected to the oil return chamber 15 via an oil inlet channel 103; the oil inlet channel 103 includes a first channel 403 and a second channel 201. The first channel 403 is disposed on the bracket 4, and the second channel 201 is disposed on the stator 2. One end of the first channel 403 communicates with the oil storage chamber 10, and the other end communicates with the second channel 201. The second channel 201 communicates with the oil return chamber 15. In this technical solution, the oil return chamber 15 has an oil return chamber drain channel 151, which communicates with the second channel 201. The second channel 201 is disposed throughout the stator 2. The oil inlet channel 103 allows lubricating oil to enter the oil storage chamber 10 from the oil return chamber 15. The oil inlet passage 103 allows lubricating oil to flow from the oil return chamber into the oil storage chamber. Because the size of the oil inlet passage 103 is limited within the compressor, and its diameter is relatively small, the passage of liquid through the oil inlet passage 103 produces a pressure-reducing and throttling effect, thereby reducing the pressure in the oil storage chamber to a value lower than that in the oil return chamber. The oil inlet passage 103 allows lubricating oil to flow from the oil return chamber 15 into the oil storage chamber 10. Because the size of the oil inlet passage 103 is limited within the compressor, and its diameter is relatively small, the passage of liquid through the oil inlet passage 103 produces a pressure-reducing and throttling effect, thereby reducing the pressure in the oil storage chamber 10 to a value lower than that in the oil return chamber 15.

[0063] In a specific embodiment, a first gasket 18 is disposed between the movable plate 3 and the bracket 4. A connecting channel b181 is provided on the first gasket 18. One end of the connecting channel b181 connects to the second channel 201, and the other end connects to the first channel 403. A throttling structure is provided within any one or more of the connecting channel b181, the second channel 201, and the first channel 403 to create a pressure differential between the pressure within the oil storage chamber 10 and the pressure within the oil return chamber 15. In this technical solution, the throttling structure can be: any one or more of the connecting channel b181, the second channel 201, and the first channel 403 can be configured as a channel of limited size and small diameter, or the throttling structure can utilize a throttling member 21, thereby ensuring a pressure reduction and throttling effect in the oil inlet channel 103.

[0064] In one specific embodiment, an oil drain channel b104 is provided in communication with the oil reservoir 10. One end of the oil drain channel b104 connects to the third cavity 12 and the other end connects to the oil reservoir 10. The oil drain channel b104 includes a fourth channel 404 and a throttle channel a182. The fourth channel 404 is provided on the bracket 4, and the throttle channel a182 is provided on the first gasket 18. One end of the throttle channel a182 connects to the fourth channel 404 and the other end connects to the third cavity 12. The first gasket 18 is used to seal the second cavity 11, and the connecting channel b181 also ensures the pressure reduction and throttling effect of the oil inlet channel 103. In this technical solution, the oil drain channel b104 connects to the oil reservoir 10 at one end and to the third cavity 12 at the other end. It can be provided separately or together with the oil drain channel a101 on the first cover plate 17.

[0065] In a specific embodiment, the oil discharge channel b104 further includes a throttling channel c105, which is provided on the bracket 4. One end of the throttling channel c105 is connected to the oil storage chamber 10, and the other end is connected to the fourth channel 404. A throttling member 21 is provided in the throttling channel c105. The throttling member 21 can throttle and reduce the pressure of the oil in the throttling channel c105, so as to generate a pressure difference between the oil storage chamber 10 and the third cavity 12. In this technical solution, in combination with reference to Figure 12 and Figure 11 As shown, the throttling member 21 is cylindrical, and an outer peripheral oil outlet channel 211 is wound around its outer surface. An internal oil outlet channel 212 is provided in the middle of the throttling member 21. The diameter of the internal oil outlet channel 212 is smaller than that of the outer peripheral oil outlet channel 211. The lubricating oil flowing in the oil discharge channel b104 is diverted through the two channels, and the throttling and pressure reduction effect is further achieved through the effect of the smaller diameters of the peripheral oil outlet channel 211 and the internal oil outlet channel 212. Ensure the pressure difference between the oil storage chamber 10 and the third cavity 12. As mentioned above, the connecting channel b181 and the throttling channel a182 provided on the first gasket 18 are as shown. Figure 7 These can be replaced with throttle holes and throttle components. These throttle channels have smaller flow areas and longer flow paths, and can be designed with different sizes based on pressure reduction requirements.

[0066] In a specific embodiment, the bracket 4 is provided with an opening on the side facing the drive motor 6, and the opening is connected to the oil storage chamber 10; the compressor oil return structure also includes a first cover plate 17, which is provided at the opening so that the oil storage chamber 10 can be sealed through the first cover plate 17. Specifically, an oil drain channel a101 is provided on the first cover plate 17, one end of which is connected to the oil storage chamber 10 and the other end is connected to the first cavity 9; the oil drain channel a101 includes an oil drain groove 173 and a third channel 174, the oil drain groove 173 is provided on the end surface of the first cover plate 17, the third channel 174 is provided on the side wall of the first cover plate 17, and the third channel 174 is connected to the oil drain groove 173. After the first cavity 9 inhales gas, the gas can drive the oil discharged from the oil drain channel a101 to move. In this technical solution, the first cover plate 17 has a sealing fitting portion a171 and a sealing fitting portion b172. The sealing fitting portions a171 and b172 cooperate with corresponding positions on the bracket 4 to seal the oil storage chamber 10. The sealing fitting portions a171 and b172 are both interference fit with the bracket 4. The lubricating oil discharged from the oil storage chamber 10 moves along with the gas sucked into the first cavity 9 to reach the lubrication position, thereby achieving the recycling of the lubricating oil. The third channel 174 throttles and reduces the pressure of the liquid flowing in the oil drain groove 173, creating a pressure difference between the first cavity 9 and the oil storage chamber 10, facilitating the drainage of the oil from the oil storage chamber 10. The third channel 174 is provided on the sealing fitting portion a171 on the outer periphery of the first cover plate 17. The third channel 174 connects the oil drain groove 173 and the oil storage chamber 10. The lubricating oil discharged from the oil storage chamber 10 moves along with the gas sucked into the first cavity 9 to reach the lubrication position, thereby achieving the recycling of the lubricating oil. The third channel 174 throttles and reduces the pressure of the liquid flowing in the oil drain groove 173, creating a pressure differential between the first cavity 9 and the oil storage cavity 10, facilitating oil drainage from the oil storage cavity 10. A third channel 174 is provided on the sealing mating portion a171 on the outer periphery of the first cover plate 17, connecting the oil drain groove 173 and the first cavity 9 (the motor low-pressure cavity). This allows the lubricating oil in the oil storage cavity 10 to enter the first cavity 9 through the oil drain channel a101 and then enter the pump body compression cavity 13 through the third cavity 12 for lubrication. The third channel 174 utilizes a smaller diameter to achieve a throttling effect. The sealing mating portions a171 and b172 provide a seal between the oil storage cavity and the low-pressure cavity. Furthermore, the methods for achieving fastening and sealing are not limited to those described above; at least conventional technologies such as screws, sealing rings, or gaskets can be used to achieve reliable sealing.

[0067] In a specific embodiment, the first cover plate 17 is connected to the bracket 4 via a locking member 26, which is provided with a seal 27. This seal 27 seals the first cover plate 17 against the bracket 4. In this technical solution, the locking member 26 is preferably a screw. The locking member 26 is provided in the circumferential region of the first cover plate 17, and the seals 27 are provided axially and on the end surfaces thereof, thereby securing the first cover plate 17 to the bracket 4 and sealing the oil reservoir 10 from the first cavity 9. The sealing method for achieving a sealed cover plate and bracket is not limited to the structure shown in the figure; other sealing methods based on existing technologies can also meet the sealing requirements of the present invention.

[0068] In a specific embodiment, the second cavity 11 is connected to the oil storage cavity 10 so that the pressure in the second cavity 11 is the same as the pressure in the oil storage cavity 10. In this technical solution, the second cavity 11 is connected to the oil storage cavity 10 so that the pressure in the second cavity 11 is the same as the pressure in the oil storage cavity 10, thereby achieving the purpose of pressure stabilization. Specifically, an eighth channel 701 is provided on the crankshaft 7 along the axial direction of the crankshaft 7. One end of the eighth channel 701 is connected to the second cavity 11, and the other end passes through the end of the crankshaft 7 away from the movable plate 3. A crankshaft throttle hole 702 is provided at the end of the crankshaft 7 away from the movable plate 3. The crankshaft throttle hole 702 is connected to the eighth channel 701 to achieve throttling and pressure reduction of the lubricating oil in the eighth channel 701.

[0069] In a specific embodiment, a seventh channel 301 is provided on the movable plate 3. One end of the seventh channel 301 communicates with the second cavity 11, and the other end communicates with the compression chamber 13. A bearing a19 is provided between the bracket 4 and the crankshaft 7, and a bearing b20 is provided between the crankshaft 7 and the movable plate 3. In this technical solution, oil and gas are exchanged between the second cavity 11 and the compression chamber 13 via the seventh channel 301. Lubricating oil discharged from the oil storage chamber 10 enters the compression chamber 13 and then partially enters the second cavity 11 through the seventh channel 301, thereby lubricating the bearings a19 and b20.

[0070] In one specific embodiment, a second cover plate 22 is provided within the oil storage chamber 10. The second cover plate 22 divides the space of the oil storage chamber 10 into an oil storage chamber and a buffer chamber 1005. A connecting hole 221 is provided on the second cover plate 22, one end of which connects to the oil storage chamber and the other end connects to the buffer chamber 1005. Specifically, the buffer chamber 1005 and the second cavity 11 are connected via a sixth channel 102. In this technical solution, the sixth channel 102 ensures that the pressure in the oil storage chamber 10 is substantially the same as that in the second cavity 11. However, the present invention can also be configured such that the sixth channel 102 is provided with a throttling feature, thereby increasing the pressure in the oil storage chamber 10 to be higher than that in the second cavity 11. This configuration can reduce the throttling pressure drop between the oil storage chamber 10 and the oil return chamber 15, allowing the throttling pressure drop in the oil inlet channel to be smaller, allowing the lubricating oil in the oil return chamber 15 to enter the oil storage chamber 10 more quickly.

[0071] In a specific embodiment, the bracket 4 is provided with a fifth channel 29, the stator plate 2 is provided with a ninth channel 203, and the stator plate 2 is further provided with a first through-hole 202. The first through-hole 202 communicates with the compression chamber 13. One end of the ninth channel 203 communicates with the first through-hole 202 and the other end communicates with the fifth channel 29. The fifth channel 29 communicates with the buffer chamber 1005. In this technical solution, the fifth channel 29, the ninth channel 203, and the first through-hole 202 maintain the pressure within the oil reservoir 10 at approximately any pressure between the intake and exhaust pressures. This design allows the pressure within the oil reservoir 10 to be set to a different pressure than that of the second cavity 11.

[0072] In a specific embodiment, a fixing member 401 is further included, and the fixing member 401 is connected and arranged between the inner wall and the outer wall of the bracket 4. There are multiple fixing members 401, and the multiple fixing members 401 are arranged at intervals along the circumference of the bracket 4, so that the oil storage chamber can be divided into several cavities by the fixing members 401. Specifically, the fixing member 401 preferably divides the oil storage chamber into an oil inlet buffer chamber a1001, an oil inlet buffer chamber b1003, an oil collecting chamber 1002, and a pressure maintaining chamber 1004. The various cavities are connected, and the buffer chamber 1005 is connected to the pressure maintaining chamber 1004 through a connecting hole 221. The connecting hole 221 is a small hole. Due to the strong fluidity of the gas, the gas can easily enter the connecting hole 221, and the oil is more blocked in the pressure maintaining chamber 1004, thereby realizing oil and gas diversion.

[0073] In a specific embodiment, the bracket 4 is provided with an opening toward the side of the movable plate 3, the opening being connected to the oil storage chamber 10; the compressor oil return structure further comprises a third cover plate 23, the third cover plate 23 being provided at the opening so as to seal the oil storage chamber 10 through the third cover plate 23. Specifically, the oil storage chamber 10 is provided with a twelfth channel, one end of the twelfth channel being connected to the oil storage chamber 10 and the other end being connected to the oil return chamber 15; the twelfth channel comprises a fourteenth channel 405, an oil inlet hole 233, and a thirteenth channel 204; the fourteenth channel 405 is provided on the bracket 4, the fourteenth channel 405 being connected to the oil storage chamber 10, the oil inlet hole 233 being provided on the third cover plate 23, the thirteenth channel 204 being provided on the stator plate 2, the oil inlet hole 233 being connected to the thirteenth channel 204 at one end and the other end, and the thirteenth channel 204 being connected to the oil return chamber 15. A second gasket 30 is provided between the third cover plate 23 and the movable plate 3 . A sixteenth channel 3002 is provided on the second gasket 30 . One end of the sixteenth channel 3002 is connected to the oil inlet hole 233 , and the other end is connected to the thirteenth channel 204 . The oil storage chamber 10 has an eighteenth channel, one end of which communicates with the third cavity 12 and the other end communicates with the oil storage chamber 10. The eighteenth channel includes an oil drain channel c402, a tenth channel 231, an eleventh channel 232, and a fifteenth channel 3001. The oil drain channel c402 is provided on the bracket 4, the eleventh channel 232 is provided on the third cover plate 23, and the eleventh channel 232 and the oil drain channel c402 are connected via the tenth channel 231. The tenth channel 231 is provided within the third cover plate 23. The fifteenth channel 3001 is provided on the second gasket 30, and one end of the fifteenth channel 3001 communicates with the third cavity 12 and the other end communicates with the eleventh channel 232. In this technical solution, the oil storage chamber 10 is provided within the bracket 4, with the cavity space opening toward the movable plate 3. The oil storage chamber is sealed by providing the third cover plate 23. The third cover plate 23 is arranged between the bracket 4 and the stator plate 2, and the third cover plate 23 and the bracket 4 are sealed by the compression of the stator plate 2. Figure 16As shown, the eighteenth channel of the oil storage chamber 10, indicated by the solid arrow curve, is provided with an oil drain channel c402 on the bracket 4, the tenth channel 231 and the eleventh channel 232 on the third cover plate 23, and the fifteenth channel 3001 on the second gasket 30, forming a flow path connecting the oil storage chamber 10 and the third cavity 1. This can be achieved by providing a throttling channel in either the oil drain channel c402 of the bracket 4 or the tenth channel 231 and the eleventh channel 232 of the third cover plate 23. The twelfth channel of the oil storage chamber 10, indicated by the dashed arrow curve, is identical to the aforementioned oil inlet channel 103. The sixteenth channel 3002, the oil inlet hole 233 of the third cover plate 23, and the fourteenth channel 405 of the bracket 4 are provided on the second gasket 30 connecting to the thirteenth channel 204, forming an oil inlet connecting the return oil chamber 15 and the oil storage chamber 10. A throttling channel may be provided on the second gasket 30, the third cover plate 23 or the bracket 4 connected above to achieve pressure reduction from the high exhaust pressure to the medium oil storage pressure.

[0074] In a specific embodiment, the housing 5 includes a second housing 25 and a first housing 24. The first housing 24 and the second housing 25 are of an integrated structure. The first housing 24 can support the compression unit. The oil storage chamber 10 is disposed in the first housing 24. Figure 18 As shown in FIG, an alternative embodiment of the present invention. An oil storage cavity structure is provided on the housing, specifically, the oil storage cavity structure is provided on the housing designed as a whole with the compressor housing, that is, the first housing 24 and the second housing 25 are designed as a whole. Figure 16 The structure shown is essentially that the oil storage chamber is provided on the housing, and the compressor does not have a separate support structure for supporting the rotor plate. The other features mentioned above can be applied to this type of compressor.

[0075] The present invention also provides a compressor, comprising the above-mentioned compressor oil return structure.

[0076] The present invention also provides an air conditioner comprising the above-mentioned compressor.

[0077] The present invention relates to a compressor oil return structure, a compressor and an air conditioner. An oil storage chamber 10 is provided between the compressor rotor 3 and the bracket 4. The oil storage chamber 10 is located in the low-temperature suction area of ​​the compressor. The oil storage chamber 10 stores the high-temperature lubricating oil separated from the exhaust gas and refluxed. By being arranged close to the low-temperature area, the low-temperature refrigerant cools the high-temperature lubricating oil in the oil storage chamber 10 before it flows back to other parts to be lubricated inside the compressor. The temperature of the lubricating oil is reduced, and more heat is taken away from the lubricated parts, which can greatly improve the lubricating effect of the lubricating oil. The oil storage chamber 10 is located between the rotor 3 and the drive motor 6. Due to the structural characteristics of this area, this area has a space with a certain axial height and radial dimensions. The existing technology does not utilize this space. A larger oil storage space can be obtained without increasing the height of the compressor cover. Compared with the oil storage technology set in the upper cover in the existing technology, the present invention can effectively reduce the axial dimension of the upper cover, and the compressor size is smaller, which is more conducive to the lightweight design of the system.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A compressor oil return structure, characterized by: include: A cover body (1), a shell (5), a drive unit and a compression unit, wherein the cover body (1) is connected to the shell (5) to form a hollow cavity, the drive unit and the compression unit are located in the hollow cavity, an oil storage cavity (10) is provided between the drive unit and the compression unit, the oil discharged by the compression unit can enter the oil storage cavity (10), a first cavity (9) for air intake is provided in the hollow cavity, and the air sucked into the first cavity (9) can move through the oil storage cavity (10) ), the outer wall of the oil storage cavity (10) can generate heat exchange with the gas in the first cavity (9); the drive unit includes a drive motor (6) and a crankshaft (7); the compressor oil return structure also includes a bracket (4), the oil storage cavity (10) is arranged in the bracket (4), a second cavity (11) is enclosed between the bracket (4) and the crankshaft (7), and the oil storage cavity (10) is located radially outside the second cavity (11); the second cavity (11) is communicated with the oil storage cavity (10).

2. The compressor oil return structure according to claim 1, characterized in that: An oil return chamber (15) is provided in the cover body (1), and the oil storage chamber (10) can be communicated with the oil return chamber (15).

3. The compressor oil return structure according to claim 2, characterized in that: The bracket (4) is located in the first cavity (9); the compression unit includes a static disk (2) and a dynamic disk (3); a third cavity (12) is provided between the static disk (2) and the bracket (4); a compression chamber (13) is provided between the static disk (2) and the dynamic disk (3); the third cavity (12) is communicated with the compression chamber (13); the dynamic disk (3) can provide power for the gas in the first cavity (9) so that the gas enters the compression chamber (13) through the third cavity (12).

4. The compressor oil return structure according to claim 3, characterized in that: The oil storage chamber (10) can be connected to the oil return chamber (15) via an oil inlet channel (103); The oil inlet channel (103) comprises a first channel (403) and a second channel (201), wherein the first channel (403) is arranged on the bracket (4), and the second channel (201) is arranged on the stator (2), one end of the first channel (403) is connected to the oil storage chamber (10), and the other end is connected to the second channel (201), and the second channel (201) is connected to the oil return chamber (15).

5. The compressor oil return structure according to claim 4, characterized in that: A first gasket (18) is provided between the movable plate (3) and the bracket (4); a connecting channel b (181) is provided on the first gasket (18); one end of the connecting channel b (181) is connected to the second channel (201), and the other end is connected to the first channel (403); a throttling structure is provided in any one or more of the connecting channel b (181), the second channel (201) and the first channel (403), so as to generate a pressure difference between the pressure in the oil storage chamber (10) and the pressure in the oil return chamber (15).

6. The compressor oil return structure according to claim 5, characterized in that: The oil storage chamber (10) is connected to an oil discharge passage b (104), one end of the oil discharge passage b (104) is connected to the third cavity (12), and the other end is connected to the oil storage chamber (10); The oil discharge channel b (104) comprises a fourth channel (404) and a throttling channel a (182), wherein the fourth channel (404) is arranged on the bracket (4), and the throttling channel a (182) is arranged on the first gasket (18), and one end of the throttling channel a (182) is connected to the fourth channel (404) and the other end is connected to the third cavity (12).

7. The compressor oil return structure according to claim 6, characterized in that: The oil discharge channel b (104) further includes a throttling channel c (105), wherein the throttling channel c (105) is arranged on the bracket (4), one end of the throttling channel c (105) is connected to the oil storage chamber (10), and the other end is connected to the fourth channel (404), and a throttling member (21) is arranged in the throttling channel c (105), and the throttling member (21) can throttle and reduce the pressure of the oil in the throttling channel c (105), so as to generate a pressure difference between the oil storage chamber (10) and the third cavity (12).

8. The compressor oil return structure according to claim 3, characterized in that: The bracket (4) is provided with an opening on a side facing the drive motor (6), and the opening is communicated with the oil storage chamber (10); The compressor oil return structure further comprises a first cover plate (17), wherein the first cover plate (17) is arranged at the opening so that the oil storage cavity (10) can be sealed by the first cover plate (17).

9. The compressor oil return structure according to claim 8, characterized in that: An oil drain channel a (101) is provided on the first cover plate (17), one end of the oil drain channel a (101) is connected to the oil storage chamber (10), and the other end is connected to the first cavity (9); The oil discharge channel a (101) comprises an oil discharge groove (173) and a third channel (174). The oil discharge groove (173) is provided on the end surface of the first cover plate (17), and the third channel (174) is provided on the side wall of the first cover plate (17). The third channel (174) is connected to the oil discharge groove (173). After the first cavity (9) absorbs gas, the gas can drive the oil discharged from the oil discharge channel a (101) to move.

10. The compressor oil return structure according to claim 8, characterized in that: The first cover plate (17) and the bracket (4) are connected via a locking member (26). A sealing member (27) is provided on the locking member (26). The sealing member (27) can seal the first cover plate (17) and the bracket (4).

11. The compressor oil return structure according to claim 3, characterized in that: The pressure in the second cavity (11) is the same as the pressure in the oil storage cavity (10).

12. The compressor oil return structure according to claim 11, characterized in that: An eighth channel (701) is provided on the crankshaft (7) along the axial direction of the crankshaft (7), one end of the eighth channel (701) being connected to the second cavity (11) and the other end passing through the end of the crankshaft (7) away from the moving disc (3).

13. The compressor oil return structure according to claim 11, characterized in that: A seventh channel (301) is provided on the movable disc (3), one end of the seventh channel (301) is connected to the second cavity (11), and the other end is connected to the compression cavity (13).

14. The compressor oil return structure according to claim 13, characterized in that: A second cover plate (22) is provided in the oil storage cavity (10), and the second cover plate (22) divides the space of the oil storage cavity (10) into an oil storage chamber and a buffer chamber (1005). A connecting hole (221) is provided on the second cover plate (22), and one end of the connecting hole (221) is connected to the oil storage chamber, and the other end is connected to the buffer chamber (1005).

15. The compressor oil return structure according to claim 14, characterized in that: The buffer cavity (1005) is connected to the second cavity (11) via a sixth channel (102).

16. The compressor oil return structure according to claim 14, characterized in that: A fifth channel (29) is provided on the bracket (4), a ninth channel (203) is provided on the stator plate (2), and a first through hole (202) is further provided on the stator plate (2). The first through hole (202) is connected to the compression chamber (13). One end of the ninth channel (203) is connected to the first through hole (202), and the other end is connected to the fifth channel (29). The fifth channel (29) is connected to the buffer chamber (1005).

17. The compressor oil return structure according to claim 14, characterized in that: It also includes a fixing member (401), the fixing member (401) being connected and arranged between the inner wall and the outer wall of the bracket (4), and the fixing member (401) is multiple, and the multiple fixing members (401) are arranged at intervals along the circumference of the bracket (4), so that the oil storage chamber can be divided into a plurality of cavities by the fixing members (401).

18. The compressor oil return structure according to claim 3, characterized in that: The bracket (4) is provided with an opening on a side facing the movable disc (3), and the opening is communicated with the oil storage chamber (10); The compressor oil return structure further comprises a third cover plate (23), wherein the third cover plate (23) is arranged at the opening so that the oil storage cavity (10) can be sealed by the third cover plate (23).

19. The compressor oil return structure according to claim 18, characterized in that: The oil storage chamber (10) has a twelfth channel, one end of the twelfth channel is connected to the oil storage chamber (10), and the other end is connected to the oil return chamber (15); The twelfth channel includes a fourteenth channel (405), an oil inlet hole (233) and a thirteenth channel (204), the fourteenth channel (405) is arranged on the bracket (4), the fourteenth channel (405) is connected to the oil storage chamber (10), the oil inlet hole (233) is arranged on the third cover plate (23), the thirteenth channel (204) is arranged on the stator (2), one end of the oil inlet hole (233) is connected to the thirteenth channel (204), and the other end is connected to the fourteenth channel (405), and the thirteenth channel (204) is connected to the oil return chamber (15).

20. The compressor oil return structure according to claim 19, characterized in that: A second gasket (30) is provided between the third cover plate (23) and the movable plate (3), and a sixteenth channel (3002) is provided on the second gasket (30), one end of the sixteenth channel (3002) is connected to the oil inlet hole (233), and the other end is connected to the thirteenth channel (204).

21. The compressor oil return structure according to claim 20, characterized in that: The oil storage cavity (10) has an eighteenth channel, one end of the eighteenth channel is connected to the third cavity (12), and the other end is connected to the oil storage cavity (10); The eighteenth channel comprises an oil drain channel c (402), a tenth channel (231), an eleventh channel (232) and a fifteenth channel (3001), wherein the oil drain channel c (402) is arranged on the bracket (4), the eleventh channel (232) is arranged on the third cover plate (23), the eleventh channel (232) and the oil drain channel c (402) are connected via the tenth channel (231), the tenth channel (231) is arranged in the third cover plate (23), the fifteenth channel (3001) is arranged on the second gasket (30), one end of the fifteenth channel (3001) is connected to the third cavity (12), and the other end is connected to the eleventh channel (232).

22. The compressor oil return structure according to claim 1, characterized in that: The housing (5) comprises a second housing (25) and a first housing (24), wherein the first housing (24) and the second housing (25) are of an integrated structure, the first housing (24) can support the compression unit, and the oil storage chamber (10) is arranged in the first housing (24).

23. A compressor, characterized in that: The invention comprises the compressor oil return structure according to any one of claims 1 to 22.

24. An air conditioner, characterized in that: Including the compressor as claimed in claim 23.

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