Compressor, air conditioner and vehicle

Abstract

The compressor comprises a shell part, a motor part and a pump body part, a containing cavity is formed in the shell part, and an oil pool is arranged at the bottom of the shell part; the motor part is mounted in the accommodating cavity and comprises a crankshaft; the pump body part is installed in the containing cavity and located below the motor part, the pump body part comprises an air cylinder and a main bearing, the main bearing is arranged on the side, facing the motor part, of the air cylinder, the crankshaft penetrates through the main bearing to be matched with a piston in the air cylinder, the main bearing is provided with a first oil return channel communicated with an oil pool, and a concave receding opening is formed in the peripheral wall of the air cylinder; the receding opening is right opposite to at least one part of the first oil return channel. Therefore, the cross section area of the first oil return channel can be increased, the flow speed of the refrigerant in the first oil return channel is reduced, and the impact of the refrigerant on the oil liquid is reduced, so that more oil liquid can flow into the oil pool, and the operation stability of the compressor is ensured.

Description

Technical Field

[0001] The utility model relates to the field of compressors, in particular to a compressor, an air conditioner and a vehicle. Background Art

[0002] In related technologies, when the compressor is in a low-temperature dormant state, a large amount of refrigerant is dissolved in the oil pool of the compressor. After the compressor is started, the temperature rises, and the refrigerant in the oil pool flashes to produce a large amount of gas. The gas will impact the oil flowing into the oil pool and reduce the flow area of ​​the oil. When the flow area is reduced, the oil will form an oil film due to the surface tension of the liquid, making it difficult for the oil to flow into the oil pool, thereby affecting the lubrication of the compressor. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a compressor that can reduce the flow rate of the refrigerant in the first oil return channel, reduce the impact of the refrigerant on the oil, so that more oil can flow into the oil pool, thereby ensuring the operating stability of the compressor.

[0004] According to the compressor of the embodiment of the present invention, it includes: a shell part, a accommodating chamber is provided in the shell part, and an oil pool is provided at the bottom of the shell part; a motor part, the motor part is installed in the accommodating chamber, and the motor part includes a crankshaft; a pump body part, the pump body part is installed in the accommodating chamber and is located below the motor part, the pump body part includes a cylinder and a main bearing, the main bearing is provided on the side of the cylinder facing the motor part, the crankshaft passes through the main bearing and cooperates with the piston in the cylinder, the main bearing is provided with a first oil return channel connected to the oil pool, the outer peripheral wall of the cylinder is provided with an inwardly concave avoidance port, and in the axial direction of the crankshaft, the avoidance port is arranged opposite to at least a part of the first oil return channel.

[0005] According to the compressor of the embodiment of the present invention, a concave avoidance port is provided on the outer peripheral wall of the cylinder, so that the first oil return channel can expand inward to increase the cross-sectional area of ​​the first oil return channel, reduce the flow rate of the refrigerant in the first oil return channel, and reduce the impact of the refrigerant on the oil, so that more oil can flow into the oil pool, thereby ensuring the operating stability of the compressor.

[0006] According to the compressor of some embodiments of the present invention, the outer circumferential wall of the cylinder and the inner circumferential wall of the shell are spaced apart to define an oil gap, the avoidance port and the oil gap are connected, and in the axial direction of the crankshaft, the oil gap and the avoidance port are respectively arranged opposite to the first oil return channel.

[0007] According to the compressor of some embodiments of the present invention, the pump body includes a fixed connecting piece, the main bearing is provided with a fixing hole, the fixed connecting piece cooperates with the fixing hole and the cylinder respectively to fixedly connect the main bearing and the cylinder, and on the same cross-section of the crankshaft, the minimum radial spacing between the first oil return channel and the fixing hole is greater than 3 mm.

[0008] According to the compressor of some embodiments of the present invention, the first oil return passage includes a first portion and a second portion that are connected. In the radial direction of the crankshaft, the second portion is located on the radial inner sidewall of the first portion and extends inward.

[0009] According to the compressor of some embodiments of the present invention, the maximum width of the first oil return channel along the radial direction of the crankshaft is D, the maximum circumference of the second part along the circumferential direction of the crankshaft is W1, and the maximum width of the second part along the radial direction of the crankshaft is L1, satisfying: L1≥D / 2, W1≥D / 2.

[0010] According to some embodiments of the compressor of the present invention, the second portion is symmetrically arranged in a middle portion of the crankshaft in a circumferential direction with respect to the first oil return passage.

[0011] According to the compressor of some embodiments of the present invention, the second part is smoothly connected to the inner wall of the first part through a transition curved surface.

[0012] According to the compressor of some embodiments of the present invention, the main bearing has a plurality of first oil return channels spaced apart along the circumferential direction.

[0013] According to some embodiments of the compressor of the present invention, the main bearing includes a main body, an extension portion and an edge portion. In the axial direction of the crankshaft, the end surface of the edge portion facing the motor portion is higher than the end surface of the main body facing the motor portion. The extension portion extends obliquely and is respectively connected to the main body and the edge portion. The first oil return channel is provided in the extension portion and a portion of the first oil return channel extends to the main body.

[0014] According to the compressor of some embodiments of the present invention, a portion of the first oil return channel extends to the edge portion.

[0015] The utility model also provides an air conditioner.

[0016] An air conditioner according to an embodiment of the present invention includes the compressor according to any one of the above embodiments.

[0017] The utility model further provides a vehicle.

[0018] A vehicle according to an embodiment of the present invention includes: an air conditioner according to any one of the above embodiments; or a compressor according to any one of the above embodiments.

[0019] The air conditioner, the vehicle and the compressor have the same advantages as those of the prior art, which will not be described in detail here.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a cross-sectional view of a compressor according to an embodiment of the present utility model;

[0023] Figure 2 is a top view of a main bearing according to an embodiment of the present utility model;

[0024] Figure 3 is a cross-sectional view of a main bearing according to an embodiment of the present utility model;

[0025] Figure 4 It is a top view of a cylinder according to an embodiment of the present utility model.

[0026] Reference numerals:

[0027] compressor 100,

[0028] Shell 1, accommodating chamber 11, exhaust passage 12, intake passage 13, oil pool 14,

[0029] Motor unit 2, motor 21, stator 211, rotor 212, crankshaft 22, oil suction channel 221, oil outlet channel 222,

[0030] Pump body 3, cylinder 31, piston 311, avoidance port 312,

[0031] Main bearing 32, main body 321, extension 322, edge 323,

[0032] First oil return channel 324, first portion 3241, second portion 3242, fixing hole 325, second oil return channel 326,

[0033] Oil pump 4, oil gap 5. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0035] Hereinafter, a compressor 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0036] like Figures 1-4 As shown, the compressor 100 according to an embodiment of the present invention includes: a shell part 1, a motor part 2 and a pump body part 3, the shell part 1 is provided with a accommodating chamber 11, and the bottom of the shell part 1 is provided with an oil pool 14; the motor part 2 is installed in the accommodating chamber 11, and the motor part 2 includes a crankshaft 22; the pump body part 3 is installed in the accommodating chamber 11 and is located below the motor part 2, the pump body part 3 includes a cylinder 31 and a main bearing 32, the main bearing 32 is provided on the side of the cylinder 31 facing the motor part 2, the crankshaft 22 passes through the main bearing 32 and cooperates with the piston 311 in the cylinder 31, the main bearing 32 is provided with a first oil return channel 324 connected to the oil pool 14, and the outer peripheral wall of the cylinder 31 is provided with an inwardly concave avoidance port 312, and in the axial direction of the crankshaft 22, the avoidance port 312 is arranged opposite to at least a part of the first oil return channel 324.

[0037] Thus, the cross-sectional area of ​​the first oil return channel 324 can be increased to reduce the flow rate of the refrigerant in the first oil return channel 324 and reduce the impact of the refrigerant on the oil, so that more oil can flow into the oil pool 14, thereby ensuring the operating stability of the compressor 100.

[0038] First, if Figures 1-4 As shown, the compressor 100 includes a housing 1, a motor 2, and a pump body 3. A housing 1 is provided within the housing 1. An exhaust passage 12 is provided at the top of the housing 11, and an intake passage 13 is provided on the sidewall. The intake passage 13 communicates with the outside of the housing 1. The exhaust passage 12 is used to connect the housing 11 with the outside of the housing 1. An oil pool 14 is provided at the bottom of the housing 11.

[0039] The motor part 2 is installed in the accommodating chamber 11 and is located at the upper part of the accommodating chamber 11. The motor part 2 includes a motor 21 and a crankshaft 22. The motor 21 includes a stator 211 and a rotor 212. The stator 211 is connected to the inner wall of the accommodating chamber 11 and is sleeved on the outside of the rotor 212. The crankshaft 22 axially penetrates the rotor 212 and extends to the bottom of the motor 21. The crankshaft 22 is connected to the rotor 212. The stator 211 can drive the rotor 212 to rotate to drive the crankshaft 22 to rotate synchronously.

[0040] An oil suction channel 221 and an oil discharge channel 222 are formed in the crankshaft 22, extending axially and arranged sequentially. The oil discharge channel 222 is located above and communicates with the oil suction channel 221. The lower end of the crankshaft 22 extends downward into the oil sump 14, connecting the oil suction channel 221 with the oil sump 14. The end of the oil discharge channel 222, facing away from the oil suction channel 221, extends to the upper portion of the motor 21. An oil pump 4 is provided in the oil suction channel 221, and is used to draw oil into the oil suction channel 221. The oil discharge channel 222 is used to further direct the oil in the oil suction channel 221 to the upper portion of the motor 21.

[0041] The pump body 3 is mounted within the accommodating chamber 11 and is located below the motor 2. The pump body 3 includes a cylinder 31 and a main bearing 32. The main bearing 32 is located on the side of the cylinder 31 facing the motor 2. The crankshaft 22 axially passes through the main bearing 32 and engages with a piston 311 within the cylinder 31. The main bearing 32 is configured to rotatably engage with the crankshaft 22 to ensure rotational stability of the crankshaft 22. The crankshaft 22 is also configured to drive the piston 311 to rotate eccentrically, allowing the cylinder 31 to draw in and compress refrigerant from the intake passage 13. The cylinder 31 is provided with a first oil return passage 324, which extends vertically through the cylinder 31 and is adapted to direct oil falling onto the pump body 3 into the oil pool 14.

[0042] Specifically, when the compressor 100 is running, the motor 21 can drive the crankshaft 22 to rotate, and the crankshaft 22 can drive the piston 311 to operate. The cylinder 31 can suck in the refrigerant from the outside of the shell 1 through the intake channel 13 and compress it. The compressed refrigerant can flow through the accommodating chamber 11 and the exhaust channel 12 to be discharged to the outside of the shell 1. At the same time, the oil pump 4 can suck the oil in the oil pool 14 into the oil suction channel 221. The oil flows upward along the oil suction channel 221 into the oil outlet channel 222. The oil can flow out from the upper end of the oil outlet channel 222 to the top of the motor 21 to cool the motor 21. The oil can then flow downward into the first oil return channel 324. The oil flowing into the first oil return channel 324 can lubricate the pump body 3 and flow back to the oil pool 14 along the first oil return channel 324.

[0043] It should be noted that when the compressor 100 is in a low-temperature dormant state, a large amount of refrigerant is dissolved in the oil pool 14 of the compressor 100. After the compressor 100 is started, the temperature rises, and the refrigerant in the oil pool 14 flashes to produce a large amount of gas. The gas will impact the oil flowing into the oil pool 14 and reduce the flow area of ​​the oil. When the flow area is reduced, the oil will form an oil film due to the surface tension of the liquid, making it difficult for the oil to flow into the oil pool 14, thereby affecting the lubrication of the compressor 100.

[0044] To address this issue, a concave relief opening 312 can be provided on the outer peripheral wall of the cylinder 31. The first oil return passage 324 can be expanded inwardly relative to the relief opening 312, so that at least a portion of the first oil return passage 324 is directly opposite the relief opening 312 in the axial direction of the crankshaft 22, thereby increasing the cross-sectional area of ​​the first oil return passage 324. This reduces the flow rate of the refrigerant in the first oil return passage 324, lessening the impact of the refrigerant on the oil, allowing more oil to flow into the oil pool 14 and ensuring a sufficient oil level within the oil pool 14.

[0045] According to the compressor 100 of the embodiment of the present invention, a concave avoidance port 312 is provided on the outer peripheral wall of the cylinder 31, so that the first oil return channel 324 can expand inward to increase the cross-sectional area of ​​the first oil return channel 324, reduce the flow rate of the refrigerant in the first oil return channel 324, and reduce the impact of the refrigerant on the oil, so that more oil can flow into the oil pool 14, thereby ensuring the operating stability of the compressor 100.

[0046] In some embodiments of the present invention, Figure 1 As shown, the outer circumferential wall of the cylinder 31 and the inner circumferential wall of the shell portion 1 can be spaced apart to define an oil gap 5, and the avoidance port 312 is connected to the oil gap 5. In the axial direction of the crankshaft 22, the oil gap 5 and the avoidance port 312 are respectively arranged opposite to the first oil return channel 324.

[0047] Specifically, when the oil drops to the main bearing 32 , the oil can flow into the first oil return channel 324 , a portion of the oil flowing into the first oil return channel 324 can flow from the oil gap 5 to the oil pool 14 , and the other portion can flow to the oil pool 14 through the avoidance port 312 .

[0048] Through the above-mentioned setting, the total area of ​​the avoidance port 312 and the oil gap 5 can be made larger than the cross-sectional area of ​​the first oil return channel 324, so that the process of oil flowing from the first oil return channel 324 to the oil pool 14 is faster and more stable, which is conducive to ensuring the operating stability of the compressor 100.

[0049] In some embodiments of the present invention, Figure 2 As shown, the main bearing 32 is provided with a second oil return passage 326. The first oil return passage 324 and the second oil return passage 326 are spaced apart along the circumference of the main bearing 32. In the axial direction of the crankshaft 22, the second oil return passage 326 is arranged directly opposite the oil gap 5, allowing oil flowing into the second oil return passage 326 to flow into the oil sump 14 through the oil gap 5. This arrangement increases the speed at which the oil flows into the oil sump 14 and ensures a high oil level within the oil sump 14.

[0050] In some embodiments of the present invention, the pump body 3 includes a fixed connecting piece, the main bearing 32 is provided with a fixing hole 325, and the fixed connecting piece cooperates with the fixing hole 325 and the cylinder 31 respectively to fixedly connect the main bearing 32 and the cylinder 31. On the same cross-section of the crankshaft 22, the minimum radial spacing between the first oil return channel 324 and the fixing hole 325 is greater than 3 mm.

[0051] For example, refer to Figure 1-Figure 2 As shown, the pump body 3 includes a fixed connecting piece, and a fixing hole 325 is provided on the main bearing 32. The fixing hole 325 is provided on the radial inner side of the first oil return channel 324 along the crankshaft 22. The fixing hole 325 penetrates the main bearing 32 in the up and down directions. The main bearing 32 is supported on the upper part of the cylinder 31. The fixed connecting piece can penetrate the fixing hole 325 from top to bottom and be connected to the cylinder 31 to fix the main bearing 32 on the cylinder 31.

[0052] In the same cross section of the crankshaft 22 , the minimum radial spacing between the first oil return channel 324 and the fixing hole 325 can be greater than 3 mm, such as 4 mm, 5 mm, etc. This ensures the overall structural strength of the main bearing 32 and improves the reliability of the compressor 100 .

[0053] In some embodiments of the present invention, Figure 2 As shown, the first oil return passage 324 includes a first portion 3241 and a second portion 3242 that communicate with each other. The first portion 3241 is configured in an arc shape and extends along the circumference of the crankshaft 22. The fixing hole 325 is located radially inward of the first oil return passage 324 in the crankshaft 22. In the radial direction of the crankshaft 22, the second portion 3242 is located on the radially inner sidewall of the first portion 3241 and extends inward, allowing the second portion 3242 to be positioned close to the fixing hole 325. This arrangement allows for better utilization of the space on the main bearing 32, thereby improving the design rationality of the compressor 100.

[0054] In some embodiments of the present invention, Figure 2 As shown, the maximum width of the first oil return channel 324 along the radial direction of the crankshaft 22 can be set to D, and the maximum circumference of the second part 3242 along the circumferential direction of the crankshaft 22 can be set to W1, and the maximum width of the second part 3242 along the radial direction of the crankshaft 22 can be set to L1, satisfying: W1≥D / 2, L1≥D / 2.

[0055] That is to say, the maximum circumference W1 of the second part 3242 along the circumference of the crankshaft 22 can be set to be greater than or equal to half of the maximum radial width D of the first oil return channel 324 along the crankshaft 22, and the maximum radial width L1 of the second part 3242 along the crankshaft 22 can be set to be greater than or equal to half of the maximum radial width D of the first oil return channel 324 along the crankshaft 22.

[0056] Through the above arrangement, the second portion 3242 can have a sufficient area, which is beneficial to reducing the impact of the refrigerant impact on the oil in the second portion 3242 and improving the flow stability of the oil in the first oil return channel 324.

[0057] In some embodiments of the present invention, Figure 2 As shown, the second portion 3242 can be symmetrically arranged about the first oil return passage 324 at the middle portion in the circumferential direction of the crankshaft 22. This can reduce the difficulty of positioning and machining the first oil return passage 324, improve the flow stability of the oil in the first oil return passage 324, and help increase the speed at which the oil flows into the oil pool 14.

[0058] In some embodiments of the present invention, Figure 2 As shown, the second portion 3242 can be smoothly connected to the inner wall of the first portion 3241 via a transitional curved surface. This can reduce stress concentration, improve the structural stability of the main bearing 32, and the transitional curved surface can be used to guide the oil in the first oil return channel 324, improving the flow stability of the oil.

[0059] In some embodiments of the present invention, Figure 2 As shown, the main bearing 32 has a plurality of first oil return passages 324, which are spaced apart along the circumference of the main bearing 32. This arrangement increases the speed at which oil flows into the oil pool 14, maintains the oil level within the oil pool 14, and makes the oil flow more uniform, thereby improving the lubrication and cooling effects of the oil pool 14.

[0060] In some embodiments of the present invention, the main bearing 32 includes a main body 321, an extension portion 322 and an edge portion 323. In the axial direction of the crankshaft 22, the end surface of the edge portion 323 facing the motor portion 2 is higher than the end surface of the main body 321 facing the motor portion 2. The extension portion 322 extends obliquely and is respectively connected to the main body 321 and the edge portion 323. The first oil return channel 324 is provided in the extension portion 322 and a portion of the first oil return channel 324 extends to the main body 321.

[0061] For example, refer to Figure 2-Figure 3As shown, the main bearing 32 includes a main body 321, an extension 322, and a rim 323. The main body 321, extension 322, and rim 323 are arranged in order from the inside to the outside of the main bearing 32 along the radial direction of the main bearing 32. In the radial direction of the crankshaft 22, the end surface of the rim 323 facing the motor 2 is higher than the end surface of the main body 321 facing the motor 2. The extension 322 extends inward and away from the motor 2 at an angle. The outer side of the extension 322 is connected to the rim 323, and the inner side is connected to the main body 321. The first oil return channel 324 is provided on the extension 322, and the first portion 3241 of the first oil return channel 324 extends to the main body 321.

[0062] Through the above-mentioned arrangement, the arrangement position of the first oil return channel 324 is not limited to the extension portion 322, which is beneficial to increasing the radial width of the first oil return channel 324 in the crankshaft 22, and improving the difficulty of forming the oil film in the first oil return channel 324, thereby reducing the impact of the refrigerant shock on the oil liquid and improving the operating stability of the compressor 100.

[0063] In some embodiments of the present invention, a portion of the first oil return passage 324 may be extended to the edge portion 323. This can further increase the width of the first oil return passage 324 in the radial direction of the crankshaft 22, thereby reducing the flow rate of the refrigerant in the first oil return passage 324 and thereby reducing the impact of the refrigerant on the oil.

[0064] The utility model also provides an air conditioner.

[0065] An air conditioner according to an embodiment of the present invention includes the compressor 100 according to any one of the above embodiments.

[0066] According to the air conditioner of the embodiment of the present invention, the compressor 100 has good operating stability, which is beneficial to improving the overall performance of the air conditioner.

[0067] The utility model further provides a vehicle.

[0068] A vehicle according to an embodiment of the present invention includes: an air conditioner according to any one of the above embodiments; or a compressor 100 according to any one of the above embodiments.

[0069] According to the vehicle of the embodiment of the present invention, the compressor 100 has good operating stability, which improves the overall performance of the vehicle and helps to improve user satisfaction.

[0070] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0071] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0072] In the description of the present invention, “plurality” means two or more.

[0073] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0074] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0075] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0076] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compressor, characterized in that: include: A housing portion, wherein a receiving cavity is provided in the housing portion, and an oil pool is provided at the bottom of the housing portion; a motor portion, the motor portion being mounted in the accommodating cavity, the motor portion comprising a crankshaft; A pump body portion is installed in the accommodating cavity and is located below the motor portion. The pump body portion includes a cylinder and a main bearing. The main bearing is provided on the side of the cylinder facing the motor portion. The crankshaft passes through the main bearing and cooperates with the piston in the cylinder. The main bearing is provided with a first oil return channel connected to the oil pool. The outer peripheral wall of the cylinder is provided with an inwardly concave avoidance port. In the axial direction of the crankshaft, the avoidance port is arranged opposite to at least a part of the first oil return channel.

2. The compressor according to claim 1, characterized in that The outer circumferential wall of the cylinder and the inner circumferential wall of the shell are spaced apart to define an oil gap, and the avoidance port is connected to the oil gap. In the axial direction of the crankshaft, the oil gap and the avoidance port are respectively arranged opposite to the first oil return channel.

3. The compressor according to claim 1, characterized in that The pump body includes a fixed connecting piece, the main bearing is provided with a fixing hole, the fixed connecting piece cooperates with the fixing hole and the cylinder respectively to fixedly connect the main bearing and the cylinder, and on the same cross-section of the crankshaft, the minimum radial spacing between the first oil return channel and the fixing hole is greater than 3 mm.

4. The compressor according to claim 3, characterized in that The first oil return passage includes a first portion and a second portion that are in communication. In the radial direction of the crankshaft, the second portion is located on the radial inner sidewall of the first portion and extends inward.

5. The compressor according to claim 4, characterized in that The maximum width of the first oil return channel along the radial direction of the crankshaft is D, the maximum circumference of the second portion along the circumferential direction of the crankshaft is W1, and the maximum width of the second portion along the radial direction of the crankshaft is L1, satisfying: L1≥D / 2, W1≥D / 2.

6. The compressor according to claim 4, characterized in that The second portion is symmetrically arranged at a middle portion of the crankshaft in a circumferential direction with respect to the first oil return passage.

7. The compressor according to claim 4, characterized in that The second part is smoothly connected to the inner wall of the first part through a transition curved surface.

8. The compressor according to claim 1, characterized in that The main bearing has a plurality of first oil return passages spaced apart in the circumferential direction.

9. The compressor according to any one of claims 1 to 8, characterized in that The main bearing includes a main body, an extension portion and an edge portion. In the axial direction of the crankshaft, the end surface of the edge portion facing the motor portion is higher than the end surface of the main body facing the motor portion. The extension portion extends obliquely and is respectively connected to the main body and the edge portion. The first oil return channel is provided in the extension portion and a portion of the first oil return channel extends to the main body.

10. The compressor according to claim 9, characterized in that A portion of the first oil return passage extends to the edge portion.

11. An air conditioner, characterized in that: Comprising a compressor according to any one of claims 1-10.

12. A vehicle, characterized in that: include: The air conditioner according to claim 11; Or, a compressor according to any one of claims 1-10.

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