Compressor and vehicle

Abstract

The utility model provides a compressor and a vehicle. The compressor comprises a machine shell and a compressor body, the compression component is arranged in the cavity and comprises an air cylinder, a main bearing, an auxiliary bearing and a crankshaft, the main bearing and the auxiliary bearing are arranged at the two ends of the air cylinder, and the two ends of the crankshaft penetrate out of the main bearing and the auxiliary bearing respectively; the oil separation part comprises a first shell, an oil separator and a third shell, and the first shell, the auxiliary bearing and the third shell define a first cavity; the oil separator comprises a second shell provided with a second cavity and an oil separation insertion pipe arranged in the second cavity, the second shell is arranged on the outer surface of the first shell, the second cavity is communicated with the first cavity and the cavity of the machine shell, and compressed refrigerants enter the oil separator from the first cavity to be subjected to oil-gas separation and then are discharged out of the machine shell; the third shell is arranged in the first cavity, the third shell and the auxiliary bearing are matched to form a third cavity, and the end, close to the auxiliary bearing, of the crankshaft is sealed in the third cavity. The compressor provided by the utility model is low in oil yield and high in working efficiency.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a compressor and a vehicle. Background Technology

[0002] The performance and reliability of the compressor play a crucial role in the overall performance of the air conditioning system. During operation, lubricating oil in the oil sump travels through oil pipes to the bearings and the gaps between sliding parts for lubrication. After dispersing, the lubricating oil mixes with the flowing, high-temperature, high-pressure refrigerant gas to form an oil-gas mixture, which is then discharged from the compressor. When the oil content in the compressor exhaust is too high, lubricating oil enters the system, affecting the heat exchange efficiency of the evaporator and condenser, reducing system performance. Furthermore, an excessively high oil content in the exhaust hinders oil return, potentially impacting the compressor's reliability.

[0003] Rotary compressors typically achieve refrigerant separation by using centrifugal force generated by the rotating rotor of a motor and by utilizing a large buffer space above the motor to reduce the refrigerant flow rate. However, rotary compressors used in automotive air conditioning systems employ high-temperature, high-density refrigerants, making existing oil-gas separation methods inadequate for achieving the required separation efficiency. Furthermore, the hollow through-hole design on the crankshaft of existing automotive rotary compressors allows high-pressure refrigerant to easily migrate to the low-pressure housing within the crankshaft, degrading compressor performance. Therefore, improvements to existing automotive compressors are necessary to address these issues. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of this utility model is to provide a compressor and vehicle that reduces the oil output of the compressor and improves the performance of the compressor.

[0005] This utility model embodiment provides a compressor, including:

[0006] The casing has an internal cavity;

[0007] A compression component is disposed within the cavity. The compression component includes a cylinder, a main bearing, a secondary bearing, and a crankshaft. The main bearing and the secondary bearing are respectively disposed at both ends of the cylinder, and the main bearing and the secondary bearing respectively pass through both ends of the crankshaft.

[0008] An oil separator is located on the side of the auxiliary bearing opposite to the cylinder. The oil separator includes a first housing, an oil separator, and a third housing. The third housing is fixed inside the first housing. The first housing, the auxiliary bearing, and the third housing together form a first chamber. The oil separator includes a second housing and an oil separator pipe. The second housing is located on the outer surface of the first housing. The second housing includes a second chamber, which communicates with the first chamber and the cavity of the housing. The oil separator pipe is located in the second chamber. The refrigerant compressed in the cylinder enters the first housing, enters the second chamber through the exhaust port of the first chamber on the first housing, and then exits the second housing after oil-gas separation through the oil separator pipe. The auxiliary bearing extends into the third housing and cooperates with the auxiliary bearing to form the third chamber. The end of the crankshaft near the auxiliary bearing is sealed in the third chamber.

[0009] In some embodiments, a gap is left between the end of the third housing and the secondary bearing.

[0010] In some embodiments, the inner wall of the first housing extends toward the center to form a plurality of protrusions, and every two of the protrusions and the third housing form a sub-chamber. The plurality of sub-chambers are interconnected, and an exhaust port for the first chamber is opened on one of the sub-chambers.

[0011] In some embodiments, the outer wall of the third housing is connected to the protrusion.

[0012] In some embodiments, the third housing is coaxially disposed with the first housing.

[0013] In some embodiments, the outer wall of the oil separator tube is provided with spiral fins, and the fins are spaced apart from the inner wall of the second chamber.

[0014] In some embodiments, the axis of the oil separator cannula is parallel to the axis of the second chamber.

[0015] In some embodiments, on the plane containing the rotation axis of the crankshaft, the angle between the orthographic projection of the central axis of the second housing and the orthographic projection of the rotation axis of the crankshaft is a right angle, and the central axis of the third housing is collinear with the orthographic projection of the rotation axis of the crankshaft.

[0016] In some embodiments, the second housing is provided with an air inlet, an exhaust outlet, and an oil outlet; the air inlet is opened on the second housing and communicates with the exhaust outlet of the first chamber; the oil separator tube is connected to and communicates with the exhaust outlet, and the exhaust outlet and the oil outlet are arranged opposite to each other along the extension direction of the oil separator tube.

[0017] In some embodiments, the air inlet is located between the exhaust port and the oil outlet, near the exhaust port, and the length of the oil separator pipe is greater than the length of the air inlet.

[0018] In some embodiments, the volume of the second chamber is smaller than the volume of the first chamber, and the volume of the third chamber is smaller than the volume of the second chamber.

[0019] In some embodiments, the third housing and / or the secondary bearing are provided with a sealing groove and a sealing element disposed in the sealing groove in the circumferential direction.

[0020] In some embodiments, the secondary bearing is provided with a secondary bearing exhaust port, which is connected to the cylinder and the first chamber respectively.

[0021] In some embodiments, the main bearing is provided with an intermediate housing on the side opposite to the cylinder, and the main bearing and the intermediate housing together form a fourth chamber. The main bearing is provided with a main bearing exhaust port, which is connected to the cylinder and the fourth chamber respectively. The compressor assembly also includes a refrigerant flow hole, which passes through the main bearing, the cylinder and the auxiliary bearing, and connects the first chamber and the fourth chamber.

[0022] This utility model embodiment also provides a vehicle including a compressor as described in any of the preceding claims.

[0023] The compressor and vehicle provided by this utility model have the following advantages:

[0024] The compressed refrigerant enters the first chamber for rectification and noise reduction. The first housing acts as a sound dampener, reducing compressor exhaust noise. The second housing is located on the outer surface of the first housing. The second chamber of the second housing contains an oil separator pipe. After the compressed refrigerant enters the second chamber from the first chamber, it undergoes oil-gas separation through the oil separator pipe. The separated lubricating oil falls back into the compressor's oil sump, while the separated refrigerant is discharged into the cavity of the casing and then further discharged outside the casing to participate in the heat exchange cycle. Oil-gas separation through the oil separator pipe in the second chamber reduces the compressor's oil output rate and improves compressor performance. The third housing seals the short shaft end of the crankshaft, preventing the compressed high-pressure refrigerant from flowing into the low-pressure casing where the crankshaft is located, further improving compressor performance. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of a compressor cut along the YZ plane according to an embodiment of the present invention;

[0027] Figure 2 This is a perspective view of the compression component of a compressor according to an embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional view of the compression component provided in one embodiment of the present invention, cut along the XZ plane;

[0029] Figure 4 This is a cross-sectional view of the compression component provided in one embodiment of the present invention, cut along the XZ plane;

[0030] Figure 5 This is a schematic diagram of the first and second housings provided in an embodiment of the present invention on the XY plane;

[0031] Figure 6 This is a schematic diagram of the first and third housings provided in an embodiment of the present invention;

[0032] Figure 7 This is a cross-sectional view of the first shell, second shell, and third shell in the XZ plane according to an embodiment of the present invention;

[0033] Figure 8 This is a cross-sectional schematic diagram of an oil separator provided in one embodiment of the present invention, cut along the XY plane;

[0034] Figure 9 This is a cross-sectional view of the first and second housings provided in an embodiment of the present invention, cut along the XZ axial direction.

[0035] Figure label:

[0036] 10. Housing 32. Oil separator

[0037] 11 Low-pressure shell 321 Second shell

[0038] 12 High-pressure shell 3211 Second chamber

[0039] 13. Intermediate shell 321a air inlet

[0040] 131 Fourth Chamber 321b Exhaust Port

[0041] 21 cylinder 321c oil drain port

[0042] 22 Main bearing 322 Oil separator cannula

[0043] 23. Exhaust passage for secondary bearing 322a

[0044] 24 Crankshaft 3221 Fins

[0045] 25 Intermediate plate 33 Third shell

[0046] 26 Piston 331 Third Chamber

[0047] 30 Oil separator component 332 Sealing groove

[0048] 31 First housing 40 Refrigerant flow hole

[0049] 311 First Chamber Detailed Implementation

[0050] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0051] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] To address the problems in the prior art, this utility model provides a compressor. For example... Figures 1 to 9 As shown, the compressor includes:

[0053] The housing 10 has an internal cavity;

[0054] A compression component is located inside the cavity; the compression component includes a cylinder 21, a main bearing 22, a secondary bearing 23, and a crankshaft 24. The main bearing 22 and the secondary bearing 23 are respectively located at both ends of the cylinder 21, and the main bearing 22 and the secondary bearing 23 are respectively passed through both ends of the crankshaft 24.

[0055] An oil separator 30 is located on the side of the auxiliary bearing 23 opposite to the cylinder 21. The oil separator 30 includes a first housing 31, an oil separator 32, and a third housing 33. The third housing 33 is fixed inside the first housing 31. The first housing 31, the auxiliary bearing 23, and the third housing 33 together form a first chamber 311. The oil separator 32 includes a second housing 321 and an oil separation tube 322. The second housing 321 is located on the outer surface of the first housing 31, and a second chamber 3211 is provided inside the second housing 3211. The cylinder 21 is connected to the cavity of the first chamber 311 and the housing 10. The oil separator pipe 322 is located in the second chamber 3211. The refrigerant compressed in the cylinder 21 enters the first housing 31, enters the second chamber 3211 through the first chamber exhaust port on the first housing 31, and is discharged outside the second housing 321 after oil-gas separation by the oil separator pipe 322. The auxiliary bearing 23 extends into the third housing 33 and cooperates with the auxiliary bearing 23 to form the third chamber 331. The end of the crankshaft 24 near the auxiliary bearing 23 is sealed in the third chamber 331.

[0056] The compressed refrigerant enters the first chamber 311 for rectification and noise reduction. The first housing 31 acts as a sound absorber, reducing the compressor's exhaust noise. The oil separator 32 is located on the outer surface of the first housing 31. The second chamber 3211 of the second housing 321 is equipped with an oil separator pipe 322. After the compressed refrigerant enters the second chamber 3211 through the first chamber 311, it undergoes oil-gas separation through the oil separator pipe 322. The separated lubricating oil falls back into the compressor's oil sump, while the separated refrigerant is discharged into the cavity of the housing 10 and then further discharged outside the housing 10 to participate in the heat exchange cycle. The oil-gas separation through the oil separator pipe 322 in the second chamber 3211 reduces the compressor's oil output rate and improves the compressor's performance. The third housing 33 seals the short shaft end of the crankshaft 24, preventing the compressed high-pressure refrigerant from flowing into the low-pressure housing where the crankshaft 24 is located, further improving the compressor's performance.

[0057] Furthermore, such as Figure 1 As shown, in this embodiment, the housing 10 includes a low-pressure housing 11, a high-pressure housing 12, and a partition between them. The partition and the low-pressure housing 11 form a low-pressure chamber, and the partition and the high-pressure housing 12 form a high-pressure chamber. A drive motor is installed in the low-pressure chamber, and a compression component is installed in the high-pressure chamber. The low-pressure housing 11 has a compressor suction port, and the high-pressure housing 12 has a compressor discharge port. The refrigerant discharged from the second housing 321 enters the high-pressure chamber and is discharged through the compressor discharge port. In this embodiment, the partition is an intermediate housing 13. In other embodiments, the partition can also be a main bearing 22.

[0058] Furthermore, such as Figure 3As shown, there is a gap between the end of the third housing 33 and the secondary bearing 23, which can increase the space of the first chamber 311 and improve the noise reduction effect; in other aspects, when the compressed refrigerant is discharged, part of it impacts the surface of the third housing 33, forming a certain buffer for the high-pressure refrigerant and improving the noise reduction and oil-gas separation effect.

[0059] Furthermore, such as Figure 6 As shown, the inner wall of the first housing 31 extends towards the center to form several protrusions. Every two protrusions and the third housing 33 form a sub-chamber. The sub-chambers are interconnected, and a first chamber exhaust port is opened on each sub-chamber. The interconnected first chamber 311 of multiple sub-chambers can improve the noise reduction and rectification effect. Furthermore, as... Figure 6 As shown, the outer wall of the third housing 33 is connected to the protrusion, facilitating the assembly of the third housing 33 and the protrusion. Furthermore, the third housing 33 is coaxially arranged with the first housing 31.

[0060] Furthermore, such as Figure 2 and Figure 8 As shown in this embodiment of the invention, the outer wall of the oil separator tube 322 is provided with spiral fins 3221, and there is a gap between the fins 3221 and the inner wall of the second chamber 3211. The oil separator tube 322 is a hollow cylindrical structure, and the fins 3221 and the oil separator tube 322 form a rotating separation channel that causes the high-pressure gas to rotate downwards. The oil-gas mixture rotates downwards in a spiral shape along the rotating separation channel. After leaving the separation channel, the oil-gas mixture continues to rotate under the action of inertial force. Due to the action of centrifugal force, the lubricating oil separates from the high-pressure gas and accumulates on the wall of the second chamber 3211. The high-pressure gas is discharged from the second chamber 3211 through the exhaust channel 322a of the oil separator tube 322. The lubricating oil flows to the oil discharge channel under the action of gravity and is discharged from the second chamber 3211. The fins 3221 guide the movement of the oil-gas mixture, causing it to flow spirally along them. This increases the travel distance of the mixture, reduces short-circuit flow in the oil separator tube 322, and improves the oil-gas separation efficiency. The oil separator tube 322 is not limited to the structure shown above.

[0061] like Figure 1 , Figure 2 , Figure 8 and Figure 9 As shown, the axis of the oil separator tube 322 is parallel to the axis of the second chamber 3211, which makes the oil-gas mixture flow smoothly in the second chamber 3211 and improves the oil-gas separation effect.

[0062] Furthermore, such as Figures 1 to 4As shown in this embodiment of the invention, on the plane (YZ plane) where the rotation axis of the crankshaft 24 is located, the angle between the orthographic projection of the central axis of the second housing 321 and the orthographic projection of the rotation axis of the crankshaft 24 is a right angle, and the central axis of the third housing 33 is collinear with the orthographic projection of the rotation axis of the crankshaft 24. That is, the central axis of the second housing 321 is perpendicular to the crankshaft 24; the third housing 33 is coaxial with the crankshaft 24.

[0063] Furthermore, the second housing 321 is positioned opposite to the end face of the auxiliary bearing 23. This arrangement allows for a smaller inner diameter than the compressor housing 10 without affecting oil separation or reducing the volume of the silencer cavity, thus improving space utilization. Simultaneously, while ensuring compressor performance, under the same lubricating oil charge and output rate, the oil level in the smaller housing can be maintained higher than that in the larger housing, improving compressor reliability and broadening the compressor's applicable operating conditions.

[0064] Furthermore, such as Figure 8 As shown, the second housing 321 is provided with an air inlet 321a, an exhaust port 321b, and an oil outlet 321c. The air inlet 321a is connected to the exhaust port of the first chamber. The oil separator pipe 322 is connected to and communicates with the exhaust port 321b. The exhaust port 321b and the oil outlet 321c are arranged opposite to each other along the extension direction of the oil separator pipe 322 (here, along the X direction). Figure 1 and Figure 8 As shown, the compressor is a horizontal compressor, with the exhaust port 321b facing upwards and the oil drain port 321c facing downwards. The refrigerant enters the second chamber 3211 from the inlet 321a, and undergoes oil-gas separation through the rotating channel formed by the fins 3221 on the oil separator pipe 322. The separated refrigerant moves upwards and is discharged from the exhaust port 321b, while the separated lubricating oil moves downwards and enters the compressor's oil sump from the oil drain port 321c.

[0065] Furthermore, in this embodiment of the present invention, the volume of the second chamber 3211 is smaller than the volume of the first chamber 311, and the volume of the third chamber 331 is smaller than the volume of the second chamber 3211.

[0066] Furthermore, the side of the housing 10 near the secondary bearing 23 has a spherical or cylindrical thick-walled pressure-resistant structure, which reduces the weight of the compressor housing. Figure 1 As shown, the high-pressure shell 12 is spherical.

[0067] like Figure 8 and Figure 9As shown in the embodiment of this utility model, the air inlet 321a is located between the exhaust port 321b and the oil outlet 321c, close to the exhaust port 321b. The length of the oil separator pipe 322 is greater than the length of the air inlet 321a, which is used to provide sufficient separation stroke for the refrigerant to improve the oil-gas separation rate.

[0068] Furthermore, in this embodiment, the secondary bearing 23 is provided with a secondary bearing exhaust port, which is connected to the cylinder 21 and the first chamber 311 respectively. The projection positions of the secondary bearing exhaust port and the exhaust port of the first chamber 311 on the horizontal plane perpendicular to the crankshaft 24 are offset.

[0069] Furthermore, such as Figures 1 to 4 As shown, in this embodiment of the present invention, the intermediate shell 13 is disposed on the side of the main bearing 22 away from the cylinder 21. The main bearing 22 and the intermediate shell 13 together form a fourth chamber 131. The main bearing 22 is provided with a main bearing exhaust port, which connects the cylinder 21 and the fourth chamber 131 respectively. The compression assembly also includes a refrigerant flow hole 40, which passes through the main bearing 22, the cylinder 21, and the auxiliary bearing 23. The refrigerant flow hole 240 connects the first chamber 311 and the fourth chamber 131. Furthermore, the projection positions of the refrigerant flow hole 240 and the exhaust port of the first chamber 311 on the horizontal plane perpendicular to the crankshaft 24 are offset. Figures 1 to 4 As shown, the compression component 20 provided in this embodiment of the present invention includes two cylinders 21, with an intermediate plate 25 between the two cylinders 21. The piston 26 in each cylinder 21 moves to change the volume of the cylinder 21, thereby compressing the refrigerant. The compressed refrigerant is discharged from the cylinder 21 through the exhaust port on the main bearing 22 and the exhaust port on the secondary bearing 23, respectively.

[0070] like Figure 1 and Figure 2 As shown, the refrigerant discharged from the exhaust port of the main bearing 22 first enters the fourth chamber 131 for rectification and noise reduction, and then enters the first chamber 311 and the second chamber 3211 through the refrigerant flow hole 40 that connects the fourth chamber 131 and the first chamber 311 to complete the oil-gas separation, and finally is discharged to the outside of the casing 10.

[0071] Furthermore, the third housing 33 and / or the auxiliary bearing 23 are provided with a sealing groove 332 and a sealing element (not shown in the figure) in the sealing groove 332 to seal the third chamber 331, that is, the third chamber 331 is not connected to the first chamber 311 and the second chamber 3211. The sealed third chamber 331 separates the low pressure connected to the central through hole of the crankshaft 24 from the high pressure gas discharged by the compressor, realizing the separation of high and low pressure and maintaining the stability of the oil level. By setting the third housing 33 on the inner surface of the first housing 31, compared with the prior art in which the diameter of the auxiliary bearing 23 is fixed to the compressor housing 10, the axial elongation of the diameter of the auxiliary bearing 23 can be reduced, and the chamber volume of the first housing 31 can be increased axially according to noise requirements.

[0072] Based on the above introduction, the specific working process of the compressor during operation will be described below.

[0073] When the compressor is running normally, the motor components apply torque to the crankshaft 24, thereby drawing low-pressure refrigerant from outside the housing 10 into the cylinder 21 and compressing it into high-pressure refrigerant. A portion of the high-pressure refrigerant is discharged through the exhaust port of the main bearing 22 and enters the fourth chamber 131. Due to the large volume of the fourth chamber 131, airflow rectification and noise reduction are achieved. The high-pressure refrigerant discharged from the exhaust port of the auxiliary bearing 23 enters the first chamber 311 of the oil separator 30. Due to the large volume of the first chamber 311, airflow rectification and noise reduction are also achieved. The high-pressure refrigerant in the fourth chamber 131 enters the first chamber 311 through the refrigerant flow hole 40, mixes with the high-pressure refrigerant there, and then enters the second chamber 3211 through the air inlet 321a. The high-pressure refrigerant can then flow around the spiral fins 3221 to achieve gas-liquid separation. The separated gaseous refrigerant is discharged from the second housing 321 through the exhaust channel 322a and the exhaust port 321b. The separated lubricating oil enters the compressor oil sump through the oil drain channel and the oil drain port 321c. Because the third housing 33 of the oil separation component 30 has a sealing element inside, the third chamber 331 is not connected to the first chamber 311 and the second chamber 3211. Therefore, the discharged high-pressure refrigerant will not flow into the low-pressure housing where the crankshaft 24 is located, achieving high- and low-pressure separation and ensuring the compressor's performance.

[0074] The compressor provided by this invention is applicable to refrigeration systems, such as air conditioners.

[0075] This utility model embodiment also provides a vehicle including the compressor described above. Therefore, the vehicle provided by this utility model embodiment has the technical effects of the compressor described above, which will not be repeated here.

[0076] In summary, the compressor and vehicle provided by this utility model have the following advantages:

[0077] The compressed refrigerant enters the first chamber for rectification and noise reduction. The first housing acts as a sound dampener, reducing compressor exhaust noise. The second housing is located on the outer surface of the first housing. The second chamber of the second housing contains an oil separator pipe. After the compressed refrigerant enters the second chamber from the first chamber, it undergoes oil-gas separation through the oil separator pipe. The separated lubricating oil falls back into the compressor's oil sump, while the separated refrigerant is discharged into the cavity of the casing and then further discharged outside the casing to participate in the heat exchange cycle. Oil-gas separation through the oil separator pipe in the second chamber reduces the compressor's oil output rate and improves compressor performance. The third housing seals the short shaft end of the crankshaft, preventing the compressed high-pressure refrigerant from flowing into the low-pressure casing where the crankshaft is located, further improving compressor performance.

[0078] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A compressor characterized by, The application relates to a compressor, which comprises: a casing with a cavity inside; a compression component arranged in the cavity, the compression component comprising a cylinder, a main bearing, a secondary bearing and a crankshaft, the main bearing and the secondary bearing being arranged at two ends of the cylinder respectively, and the two ends of the crankshaft penetrating the main bearing and the secondary bearing respectively; an oil separation component arranged at a side of the secondary bearing away from the cylinder, the oil separation component comprising a first casing, an oil separator and a third casing, the third casing being fixed in the first casing, the first casing, the secondary bearing and the third casing forming a first chamber, the oil separator comprising a second casing and an oil separation pipe, the second casing being arranged on an outer surface of the first casing, the second casing comprising a second chamber inside, the second chamber being communicated with the first chamber and the cavity of the casing, the oil separation pipe being arranged in the second chamber, compressed refrigerant in the cylinder entering the first casing, being discharged into the second chamber through a first chamber exhaust port on the first casing, and being discharged out of the second casing after oil-gas separation through the oil separation pipe, the secondary bearing penetrating into the third casing, and the secondary bearing and the third casing forming a third chamber, and the end of the crankshaft close to the secondary bearing being sealed in the third chamber.

2. The compressor of claim 1, wherein, The third casing is spaced apart from the secondary bearing.

3. The compressor according to claim 1 or 2, characterized in that The inner wall of the first casing extends to the center to form a plurality of protrusions, each two protrusions and the third casing forming a sub-chamber, and a plurality of sub-chambers being communicated with each other, and the first chamber exhaust port being arranged on a sub-chamber.

4. The compressor of claim 3, wherein, The outer wall of the third casing is connected with the protrusions.

5. The compressor of claim 1, wherein, The third casing is coaxially arranged with the first casing.

6. The compressor of claim 1, wherein, The outer wall of the oil separation pipe is provided with spiral fins, and the fins are spaced apart from the inner wall of the second chamber.

7. The compressor according to claim 1 or 6, characterized in that The axis of the oil separation pipe is parallel to the axis of the second chamber.

8. The compressor of claim 1, wherein, In a plane where the rotation axis of the crankshaft is located, the normal projection of the central axis of the second casing and the normal projection of the rotation axis of the crankshaft form a right angle, and the central axis of the third casing is collinear with the normal projection of the rotation axis of the crankshaft.

9. The compressor of claim 1, wherein, The second casing is provided with an air inlet, an exhaust port and an oil outlet, the air inlet is arranged on the second casing and communicated with the first chamber exhaust port, the oil separation pipe is connected with and communicated with the exhaust port, and the exhaust port and the oil outlet are arranged away from each other along the extension direction of the oil separation pipe.

10. The compressor of claim 9, wherein, The air inlet is located between the exhaust port and the oil outlet and close to the exhaust port, and the length of the oil separation pipe is greater than the length of the air inlet.

11. The compressor of claim 1, wherein, The volume of the second chamber is less than the volume of the first chamber, and the volume of the third chamber is less than the volume of the second chamber.

12. The compressor of claim 1, wherein, The third casing or / and the secondary bearing is provided with a sealing groove and a sealing element arranged in the sealing groove.

13. The compressor of claim 1, wherein, The secondary bearing is provided with a secondary bearing exhaust port, and the secondary bearing exhaust port is communicated with the cylinder and the first chamber respectively.

14. The compressor of claim 1 or 13, wherein, The main bearing is further provided with an intermediate shell on the side away from the cylinder, the main bearing and the intermediate shell form a fourth chamber, the main bearing is provided with a main bearing exhaust port, the main bearing exhaust port respectively communicates the cylinder and the fourth chamber, the compression component further comprises a refrigerant through hole, the refrigerant through hole penetrates the main bearing, the cylinder and the auxiliary bearing, and the refrigerant through hole communicates the first chamber and the fourth chamber.

15. A vehicle characterized by comprising: A compressor comprising a compression element as claimed in any one of claims 1 to 14.

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