CN114109819B

CN114109819B - Exhaust oil component structure of compressor and scroll compressor

Info

Publication number: CN114109819B
Application number: CN202111397627.1A
Authority: CN
Inventors: 徐嘉; 陈肖汕; 刘韵; 吕浩福; 杨帆; 樊晓翠
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2023-11-03
Anticipated expiration: 2041-11-23
Also published as: CN114109819A

Abstract

The invention provides a compressor exhaust oil separation structure and a scroll compressor. The compressor exhaust oil separation structure includes a pump body assembly and an oil separation cylinder. The outer circumferential wall of the oil separation cylinder is provided with a centrifugal Oil separator, the pump body assembly has an exhaust port, the centrifugal oil separator is arranged corresponding to the exhaust port, and the centrifugal oil separator can surround the exhaust port under the action of the exhaust air flow. The axis of the oil separation cylinder rotates. According to the present invention, the centrifugal oil separator can recoil and rotate under the impact of the exhaust air flow from the exhaust port, and the rotating centrifugal oil separator can use the centrifugal force of its rotation to separate the oil in the exhaust gas. At the same time, it can also absorb the impact of the exhaust air flow through the kinetic energy of rotation, which can effectively reduce the vibration of the compressor caused by the impact of the exhaust air flow and improve the reliability of the compressor.

Description

Exhaust oil component structure of compressor and scroll compressor

Technical Field

The invention belongs to the technical field of compressor manufacturing, and particularly relates to a compressor exhaust oil component structure and a scroll compressor.

Background

The horizontal scroll compressor for new energy vehicles generally adopts a horizontal compressor with a low-pressure cavity structure, and has high oil discharge rate, mainly because the space occupation ratio of an exhaust cavity is small, and the refrigerating oil carried by the exhaust is carried away from the compressor in the future and separated or returned. Therefore, an oil-gas separation structure and an oil return channel are generally arranged at the position of the integrated exhaust end cover, but the integrated end cover is provided with a small structural space, a short passage and a small oil filtering structure, the end cover can only be manufactured in a ordered mode, the processing or forming cost of the end cover is high, in addition, an exhaust cavity is small, exhaust directly impacts the end cover, and the end cover vibrates greatly. In addition, if the high-low pressure partition plate and the exhaust cover are directly welded on the shell, the exhaust cover is also directly impacted by the exhaust, so that the vibration is large, in addition, the exhaust carries the frozen oil to directly discharge out of the compressor through the cavity between the exhaust cover and the high-low pressure partition plate without oil separation, so that the oil storage of the compressor can be reduced, and the reliability can be influenced.

Disclosure of Invention

Therefore, the invention provides a compressor exhaust oil component structure and a scroll compressor, which can overcome the defect of large vibration of a compressor cover body caused by high exhaust oil discharge rate and exhaust impact of the compressor in the related art.

In order to solve the problems, the invention provides a compressor exhaust oil component structure, which comprises a pump body component and an oil distribution cylinder body, wherein a centrifugal oil distributor is arranged on the outer circumferential wall of the oil distribution cylinder body, the pump body component is provided with an exhaust port, the centrifugal oil distributor is arranged corresponding to the exhaust port, and the centrifugal oil distributor can rotate around the axis of the oil distribution cylinder body under the action of exhaust air flow of the exhaust port.

In some embodiments, the centrifugal oil separator is provided with a plurality of circumferentially arranged backflushing grooves, the notch of each backflushing groove faces the exhaust direction of the exhaust port, and an elastic piece is clamped between one side of the groove bottom of each backflushing groove and the first axial end of the oil separating cylinder body.

In some embodiments, a retaining ring is arranged on one side of the centrifugal oil separator, which is away from the elastic piece, and the retaining ring is sleeved on the outer circumferential wall of the oil separating cylinder.

In some embodiments, an air inlet hole penetrating through the inside and the outside of the oil distributing cylinder body and an air outlet communicated with an exhaust pipe of the compressor are further formed in the outer circumferential wall of the oil distributing cylinder body, a first oil return hole is formed in the first axial end of the oil distributing cylinder body, and the first oil return hole is communicated with an oil return oil duct formed in the pump body assembly.

In some embodiments, the compressor exhaust oil structure further comprises a high-low pressure cavity separation cover, the high-low pressure cavity separation cover is arranged on one side of the exhaust port of the pump body assembly and is positioned in an end cover of the compressor, the oil separation cylinder is arranged in the high-low pressure cavity separation cover, and the high-low pressure cavity separation cover is communicated with the exhaust pipe through the oil separation cylinder; and/or a throttling part is arranged in the oil return passage.

In some embodiments, the high-low pressure cavity separation cap has a cap barrel coaxial with the pump body assembly, the axial first end of the oil separation barrel fitting against an inner wall of the cap barrel; and/or an oil return micro-channel is constructed on the inner wall of the cover cylinder, the oil return micro-channel communicates the first oil return hole with a first area, and the first area is a space inside the high-low pressure cavity separation cover and outside the oil separation cylinder body.

In some embodiments, the oil return micro-channel is provided with a second oil return hole, and a filtering part is arranged between the second oil return hole and the oil return channel; and/or the cover cylinder is provided with a through hole, the axial second end of the oil distributing cylinder body extends out of the through hole, and the outer circumferential wall of the oil distributing cylinder body is connected with the through hole in an interference fit manner or welded.

In some embodiments, a throttle oil passage is formed in the wall of the oil distributing cylinder body.

In some embodiments, the oil separating cylinder body has a cylinder circumferential wall and a cylinder bottom wall connected to one end of the cylinder circumferential wall corresponding to the first axial end, a plurality of axial throttling channels extending along the axial direction of the cylinder circumferential wall and a first circumferential throttling channel capable of being communicated with one end of the adjacent two axial throttling channels away from the cylinder bottom wall along the circumferential direction of the cylinder circumferential wall are arranged in the cylinder bottom wall, a second circumferential throttling channel capable of being communicated with one end of the adjacent two axial throttling channels close to the cylinder bottom wall along the circumferential direction of the cylinder circumferential wall is formed in the cylinder bottom wall, and one of the first circumferential throttling channel and the axial throttling channel is provided with an oil return inlet communicated with the bottom of the oil separating cylinder body, so that lubricating oil separated in the oil separating cylinder body can flow from the oil return inlet into the first circumferential throttling channel and the axial throttling channel to form a plurality of bends in the second circumferential throttling channel and then flow back from the first oil return hole.

In some embodiments, a filtering component is arranged between the axial throttling flow passage and the oil return passage, and/or a filtering component is arranged between two adjacent axial throttling flow passages; and/or the section of the axial throttling flow passage is a circle with the radius d, and d is more than or equal to 0.5mm and less than or equal to 2mm.

In some embodiments, the first circumferential throttling flow channel is provided with a first opening facing to the outer side of the oil separating barrel, a hoop is sleeved on the outer circumferential side wall of the oil separating barrel, and the hoop can seal the first opening so that two adjacent axial throttling flow channels can be communicated by the first circumferential throttling flow channel; and/or the second circumferential throttling flow passage is provided with a second opening facing the outer side of the oil separating cylinder body, and the cylinder body of the high-low pressure cavity separation cover can seal the second opening so that two adjacent axial throttling flow passages can be communicated by the second circumferential throttling flow passage.

In some embodiments, a plurality of grooves are formed on the inner annular wall of the hoop, and the grooves are respectively arranged in one-to-one correspondence to the first openings, so that two adjacent axial throttling channels can be communicated by the first circumferential throttling channel.

In some embodiments, an oil separation pipe is further arranged in the oil separation cylinder, and the air flow entering the oil separation cylinder through the air inlet hole can be discharged through the exhaust pipe after being separated again through the oil separation pipe.

In some embodiments, the axial second end of the oil distributing cylinder body is an open end, and the exhaust pipe is inserted into the axial second end and is in interference fit connection with the inner peripheral wall of the oil distributing cylinder body through the expansion action of the steel ring; alternatively, the exhaust pipe is connected to a cylinder peripheral wall of the oil separation cylinder.

The invention also provides a scroll compressor which comprises the compressor exhaust oil component structure.

In some embodiments, the scroll compressor is a horizontal scroll compressor.

According to the exhaust oil component structure of the compressor and the scroll compressor, the centrifugal oil separator can recoil and rotate under the impact of the exhaust air flow of the exhaust port, the rotating centrifugal oil separator can separate oil components in the exhaust air by utilizing the rotating centrifugal force of the centrifugal oil separator, meanwhile, the absorption of the impact of the exhaust air flow can be formed by the rotating kinetic energy, the vibration of the compressor caused by the impact of the exhaust air flow can be effectively reduced, and the reliability of the compressor is improved.

Drawings

FIG. 1 is a schematic view showing an internal structure of a scroll compressor according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the centrifugal separator of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

FIG. 4 is a schematic perspective view of the high-low pressure chamber separation cover in FIG. 1;

FIG. 5 is a schematic illustration of the compressor discharge oil configuration of FIG. 1;

FIG. 6 is a view of the dispensing cartridge of FIG. 5 in the B-direction;

FIG. 7 is a schematic perspective view of the oil distributing cylinder in FIG. 5;

FIG. 8 is an internal cross-sectional view of the dispensing cartridge of FIG. 5 after being deployed in its circumferential direction;

FIG. 9 is an internal schematic view of a compressor discharge oil structure in accordance with another embodiment of the present invention;

FIG. 10 is an internal schematic view of a compressor discharge oil structure in accordance with yet another embodiment of the present invention;

FIG. 11 is an internal schematic view of a scroll compressor in accordance with another embodiment of the present invention;

FIG. 12 is an internal schematic view of a compressor discharge oil structure in accordance with yet another embodiment of the present invention;

FIG. 13 is a schematic view of the disassembled structure of the dispensing cartridge of FIG. 12;

fig. 14 is another schematic view of the disassembled structure of the oil separation cylinder in fig. 12.

The reference numerals are expressed as:

3. a lower bracket; 4. a motor; 5. a shaft; 6. a bearing; 7. an upper bracket; 8. a movable scroll; 9. a fixed scroll; 10. an exhaust gas deflector; 12. an exhaust pipe seat; 901/902/903, static disc oil passage; 701/702 bracket oil passage; 22. a plug; 300. an oil separating cylinder; 301. a centrifugal separator; 3011. a back-flushing groove; 302. an exhaust port; 303. an elastic member; 304. a retainer ring; 305. an air inlet hole; 306. a first oil return hole; 310. a high-low pressure chamber separation cover; 311. an oil return microchannel; 312. a second oil return hole; 313. a filter member; 314. a throttle member; 315. a through hole; 320. an axial throttle flow passage; 321. a first circumferential flow restriction; 322. a second circumferential flow restriction; 323. an oil return inlet; 330. a hoop; 331. a groove; 340. an oil separation pipe; 350. a steel ring; a. an exhaust pipe; b. an end cap; c. and a housing.

Detailed Description

Referring to fig. 1 to 14, according to an embodiment of the present invention, a compressor, especially a horizontal scroll compressor (as specifically shown in fig. 1 and 11), is provided, which includes a casing c and end caps b at two axial ends of the casing c, the casing c has a pump body assembly and a motor 4 capable of driving the pump body assembly to operate and compress a refrigerant, the pump body assembly specifically includes an inter-engaged orbiting scroll 8 and a fixed scroll 9, wherein the orbiting scroll 8 is in driving connection with the motor 4 through a crankshaft 5, two ends of the crankshaft 5 are respectively provided with an upper bracket 7 and a lower bracket 3 to form a rotary support, the crankshaft 5 drives the scroll 9 to perform a circumferential translational motion around a center of the crankshaft 5 relative to the fixed scroll 9, the orbiting scroll 8 and the fixed scroll 9 are engaged with each other to form a crescent compression cavity, the compressed refrigerant gas continuously forms a high-pressure exhaust area from an air intake, compression and exhaust flow guide 10, and the compressed refrigerant gas is discharged from an exhaust port 302 at the center of the fixed scroll to the corresponding exhaust guide 10. The compressor is of a low-pressure cavity structure, air is sucked into a motor cavity at a low pressure side from an air inlet on the shell c, and rotates along with a shaft system, a balance block on the shaft system stirs oil at the bottom of the shell to carry lubrication operation components, meanwhile, refrigerating oil is carried into the air suction cavity to be compressed and then is discharged out of the compressor through an exhaust passage, the higher the rotating speed is, the larger the oil discharge amount is, in particular, the more serious the horizontal low-pressure cavity compressor is, because an exhaust cavity is not of a vertical high-pressure cavity structure, the exhaust cavity is small, the exhaust gas is directly discharged out of the compressor without buffer deposition, and the oil discharge rate is high; in addition, the exhaust directly impacts the front cover, so that the exhaust end cover of the compressor vibrates greatly.

Specifically, the compressor exhaust oil structure comprises a pump body assembly and an oil separation cylinder 300, wherein a centrifugal oil separator 301 is arranged on the outer circumferential wall of the oil separation cylinder 300, the pump body assembly is provided with an exhaust port 302, the centrifugal oil separator 301 is arranged corresponding to the exhaust port 302, and the centrifugal oil separator 301 can rotate around the axis of the oil separation cylinder 300 under the action of exhaust air flow of the exhaust port 302. In this technical solution, the centrifugal oil separator 301 can recoil and rotate under the impact of the exhaust air flow of the exhaust port 302, the rotating centrifugal oil separator 301 can separate the oil in the exhaust gas by using the rotating centrifugal force thereof, and meanwhile, the rotational kinetic energy can form the absorption of the impact of the exhaust air flow, so that the vibration of the compressor caused by the impact of the exhaust air flow can be effectively reduced, and the reliability of the compressor is improved.

As shown in fig. 2, the centrifugal oil separator 301 has a plurality of circumferentially arranged backflushing grooves 3011, the notch of the backflushing groove 3011 faces the exhaust direction of the exhaust port 302, it can be understood that the airflow discharged from the exhaust port 302 will deviate from the flow direction under the action of the backflushing groove 3011, this deviation is beneficial to separating the oil in the airflow, an elastic member 303 is sandwiched between the groove bottom side of the backflushing groove 3011 and the first axial end of the oil separating cylinder 300, and the elastic member 303 may be a spring sleeved on the outer circumferential wall of the oil separating cylinder 300.

In some embodiments, a retaining ring 304 is disposed on a side of the centrifugal oil separator 301 facing away from the elastic member 303, the retaining ring 304 is sleeved on an outer circumferential wall of the oil separating cylinder 300, and the positioning of the retaining ring 304 can limit the position of the centrifugal oil separator 301 in the axial direction of the oil separating cylinder 300, so as to ensure that the centrifugal oil separator is always located at a position capable of forming recoil for the exhaust airflow of the exhaust port 302.

In some embodiments, the outer circumferential wall of the oil separating cylinder 300 is further configured with an air inlet 305 penetrating through the outer and inner sides of the oil separating cylinder and an air outlet communicated with the air outlet pipe a of the compressor, the axial first end of the oil separating cylinder 300 is provided with a first oil return hole 306, and the first oil return hole 306 is communicated with an oil return channel configured in the pump body assembly, so that separated frozen oil can be timely conveyed to a lubrication part of the compressor and finally flows back to a low-pressure oil storage area of the compressor. Referring to fig. 1 and 11, the oil return passage specifically includes a fixed disc oil passage 901/902/903 configured on the fixed scroll 9 and a bracket oil passage 701/702 configured on the upper bracket 7 (corresponding opening ends are plugged by plugs 22), the directions of the fixed disc oil passage 901/902/903 and the bracket oil passage 701/702 are reasonably set according to specific lubrication positions, the cross-sectional diameter d of the oil return passage is preferably 0.5 mm-2 mm without the throttle part 314, so as to ensure the throttle effect, and further, considering the processing problem, the throttle part 314 may be disposed in the oil return passage, so that the cross-sectional size of the oil return passage may be set larger, the throttle part 314 may be, for example, a throttle pin, and the gap between the throttle pin and the oil return passage may be controlled within 0.05 mm-1.0 mm.

In some embodiments, the compressor exhaust oil structure further includes a high-low pressure cavity separation cover 310, the high-low pressure cavity separation cover 310 is covered on one side of the exhaust port 302 of the pump body assembly and is located in an end cover b (exhaust side) of the compressor, the oil separation cylinder 300 is located in the high-low pressure cavity separation cover 310, and the high-low pressure cavity separation cover 310 is communicated with the exhaust pipe a through the oil separation cylinder 300, so that the high-pressure cavity and the low-pressure cavity are separated through the high-low pressure cavity separation cover 310, direct rigid contact between high-pressure airflow and the end cover b is effectively prevented, and noise caused by impact is reduced.

The high-low pressure cavity separation cover 310 is provided with a cover cylinder coaxial with the pump body assembly, the first axial end of the oil separation cylinder 300 is attached to the inner wall of the cover cylinder, that is, one end of the oil separation cylinder 300 is a cylindrical surface matched with the inner wall of the cover cylinder, that is, the end surface arc R of the oil separation cylinder is D with the inner diameter of the cover cylinder, r=d/2, so that the oil separation cylinder and the cover cylinder are completely attached to each other, and end surface resistance welding or ring welding fastening can be performed between the oil separation cylinder and the cover cylinder. The side of the cover cylinder facing the exhaust port 302 is provided with a circular flange, and the high-low pressure cavity separation cover 310 and the pump body component (in particular, the cover cylinder can be bolted with the end surface of the fixed scroll 9) through the circular flange. The high-low pressure cavity separation cover 310 can be formed by directly stamping a plate, and has a simple structure and low forming cost, and the closed end of the cover body can be in a circular plate shape or a spherical shape.

In some embodiments, the exhaust pipe a is connected to the circumferential wall of the oil separating cylinder 300 (as shown in fig. 12-14), and the axial second end of the oil separating cylinder 300 may be an open end but the casing is closed, so that the direction of the arrangement of the exhaust pipe of the compressor is more flexible.

Or, the cover cylinder is configured with a through hole 315, the axial second end of the oil separating cylinder 300 extends out of the through hole 315, the outer circumferential wall of the oil separating cylinder 300 is in interference fit connection or welding with the through hole 315, more specifically, the outlet of the oil separating cylinder 300 is in fit connection with the exhaust pipe a, the axial second end (the end opposite to the axial first end) of the oil separating cylinder 300 is an open end, the exhaust pipe a is inserted into the axial second end, and is in interference fit connection with the inner circumferential wall of the oil separating cylinder 300 through the expansion action of a steel ring 350 (as shown in fig. 1), the corresponding casing c is provided with an exhaust pipe seat 12, and the exhaust pipe a is welded with the exhaust pipe seat 12 to realize inner and outer side sealing connection of the compressor.

An oil return micro-channel 311 (the through-flow diameter of which is smaller than 0.1 mm) is configured on the inner wall of the cover cylinder, the oil return micro-channel 311 communicates the first oil return hole 306 with a first area, and the first area is a space between the inside of the high-low pressure cavity separation cover 310 and the outside of the oil separation cylinder 300, so that cooling oil separated from the inner side and the outer side of the oil separation cylinder 300 can flow back.

In some embodiments, the oil return micro-channel 311 is provided with a second oil return hole 312, a filter part 313 is disposed between the second oil return hole 312 and the oil return channel, and the filter part 313 may be, for example, an oil filter, an oil return pipe section, a cylinder body, a cylinder cover, and a filter screen, where the filter screen is formed by embedding an annular outer ring wrapping metal and the oil filter screen into a whole, and is fixed in the cylinder body through interference fit between the outer ring metal and the inner wall surface of the cylinder body, and the cylinder body and the oil return pipe section are connected with the cylinder body into a whole through welding.

As shown in fig. 5 to 8, a throttle oil passage is formed in the wall of the oil separation cylinder 300 to throttle the refrigerant oil separated from the compressor discharge oil structure between the backflow. Specifically, the oil separating cylinder 300 has a cylinder circumferential wall and a cylinder bottom wall connected to one end of the cylinder circumferential wall corresponding to the first axial end, the cylinder circumferential wall has a plurality of axial throttle channels 320 extending along the axial direction thereof and a first circumferential throttle channel 321 capable of communicating adjacent two axial throttle channels 320 along the circumferential direction of the cylinder circumferential wall at one end far away from the cylinder bottom wall, a second circumferential throttle channel 322 capable of communicating adjacent two axial throttle channels 320 along the circumferential direction of the cylinder circumferential wall at one end near the cylinder bottom wall is configured in the cylinder bottom wall, one of the first circumferential throttle channel 321 and the axial throttle channel 320 has an oil return inlet 323 communicating with the bottom of the oil separating cylinder 300 at one of the second circumferential throttle channel 322, so that lubricating oil separated in the oil separating cylinder 300 can enter the first circumferential throttle channel 321 and the axial throttle channel 320 from the oil return inlet 323, and then flow out of the first pressure reducing hole 306 after forming a plurality of oil return holes at the second circumferential throttle channels 322, and the first pressure reducing holes can prevent the high pressure from flowing back, and the high pressure of the low pressure air flowing back can be prevented. The cross section of the axial throttling flow passage 320 is a circle with the radius d, and d is more than or equal to 0.5mm and less than or equal to 2mm so as to ensure the throttling and depressurization effects.

In some embodiments, the aforementioned filter element 313 may also be disposed between the axial throttle flow passages 320 and the oil return passage, and/or the aforementioned filter element 313 may also be disposed between two adjacent axial throttle flow passages 320.

In some embodiments, the first circumferential throttling flow channel 321 has a first opening facing to the outer side of the oil separating cylinder 300, a hoop 330 is sleeved on the outer circumferential side wall of the oil separating cylinder 300, and the hoop 330 can close the first opening so that two adjacent axial throttling flow channels 320 can be communicated by the first circumferential throttling flow channel 321; and/or, the second circumferential throttling flow channel 322 has a second opening facing to the outer side of the oil distributing cylinder 300, the cover cylinder can close the second opening so that two adjacent axial throttling flow channels 320 can be communicated by the second circumferential throttling flow channel 322. The aforementioned function of the hoop 330 may also be achieved by the aforementioned through hole 315, specifically, the first opening may be inserted into the through hole 315 in an interference fit manner.

In other embodiments, a plurality of grooves 331 are formed on the inner wall of the shroud 330, and the plurality of grooves 331 are disposed in a one-to-one correspondence with the first openings, so that two adjacent axial flow restriction channels 320 can be communicated by the first circumferential flow restriction channel 321.

In some embodiments, the oil separation cylinder 300 is further provided with an oil separation pipe 340, the air flow entering the oil separation cylinder 300 through the air inlet hole 305 can be separated again through the oil separation pipe 340 and then discharged through the exhaust pipe a, it is understood that the opening direction of the air inlet hole 305 can be preferably along the circumferential tangential direction of the oil separation cylinder 300, so that the entering air flow rotates along the annular space between the oil separation pipe 340 and the oil separation cylinder 300, a cyclone oil separation system is formed, and the separated air flow flows the oil into the exhaust pipe a near the outlet of the first axial end of the oil separation cylinder 300. At this time, the oil discharged from the compressor is more effectively reduced by performing the first oil separation in the exhaust gas flow in the centrifugal separator 301 and the second oil separation in the oil separation cylinder 300.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.

Claims

1. The exhaust oil structure of the compressor is characterized by comprising a pump body assembly and an oil separation cylinder (300), wherein a centrifugal oil separator (301) is arranged on the outer circumferential wall of the oil separation cylinder (300), the pump body assembly is provided with an exhaust port (302), the centrifugal oil separator (301) is arranged corresponding to the exhaust port (302), and the centrifugal oil separator (301) can rotate around the axis of the oil separation cylinder (300) under the action of exhaust air flow of the exhaust port (302); the centrifugal oil separator (301) is provided with a plurality of circumferentially arranged backflushing grooves (3011), the notch of the backflushing groove (3011) faces the exhaust direction of the exhaust port (302), and an elastic piece (303) is clamped between one side of the groove bottom of the backflushing groove (3011) and the first axial end of the oil separating cylinder body (300).

2. The compressor discharge oil structure according to claim 1, wherein a retainer ring (304) is provided on a side of the centrifugal separator (301) facing away from the elastic member (303), and the retainer ring (304) is sleeved on an outer circumferential wall of the oil separation cylinder (300).

3. The compressor discharge oil structure according to claim 1, wherein an air inlet hole (305) penetrating through the inside and the outside of the oil separation cylinder (300) and an air outlet communicated with an air discharge pipe (a) of the compressor are further formed on the outer circumferential wall of the oil separation cylinder (300), a first oil return hole (306) is formed in the first axial end of the oil separation cylinder (300), and the first oil return hole (306) is communicated with an oil return passage formed in the pump body assembly.

4. A compressor discharge oil structure according to claim 3, further comprising a high-low pressure chamber separation cover (310), wherein the high-low pressure chamber separation cover (310) is covered on one side of the discharge port (302) of the pump body assembly and is positioned in an end cover (b) of the compressor, the oil separation cylinder (300) is arranged in the high-low pressure chamber separation cover (310), and the high-low pressure chamber separation cover (310) is communicated with the discharge pipe (a) through the oil separation cylinder (300); and/or a throttling part (314) is arranged in the oil return passage.

5. The compressor discharge oil structure according to claim 4, wherein the high-low pressure chamber separation cover (310) has a cover cylinder coaxial with the pump body assembly, the axial first end of the oil separation cylinder (300) being fitted with an inner wall of the cover cylinder; and/or an oil return micro-channel (311) is formed on the inner wall of the cover cylinder, the oil return micro-channel (311) communicates the first oil return hole (306) with a first area, and the first area is a space between the inside of the high-low pressure cavity separation cover (310) and the outside of the oil separation cylinder body (300).

6. The compressor exhaust oil structure according to claim 5, characterized in that the oil return micro-channel (311) has a second oil return hole (312), and a filtering part (313) is provided between the second oil return hole (312) and the oil return passage; and/or the cover cylinder is provided with a through hole (315), the axial second end of the oil distributing cylinder body (300) extends out of the through hole (315), and the outer circumferential wall of the oil distributing cylinder body (300) is connected with the through hole (315) in an interference fit manner or welded.

7. The compressor discharge oil structure according to claim 4, wherein a throttle oil passage is constructed in a wall of the oil separation cylinder (300).

8. The compressor discharge oil structure according to claim 7, wherein the oil separation cylinder body (300) has a cylinder peripheral wall and a cylinder bottom wall connected to an end of the cylinder peripheral wall corresponding to the axial first end, the cylinder peripheral wall has a plurality of axial throttle channels (320) extending in an axial direction thereof and a first circumferential throttle channel (321) capable of communicating in a circumferential direction of the cylinder peripheral wall adjacent to one end of the axial throttle channel (320) away from the cylinder bottom wall, a second circumferential throttle channel (322) capable of communicating in a circumferential direction of the cylinder peripheral wall adjacent to one end of the cylinder bottom wall adjacent to the two axial throttle channels (320) is configured in the cylinder bottom wall, and one of the first circumferential throttle channel (321) and the axial throttle channel (320) has an oil return inlet (323) communicating with a bottom of the oil separation cylinder (300) so that lubricating oil separated in the oil separation cylinder body (300) can flow from the oil return inlet (323) into the first circumferential throttle channel (321), the second circumferential throttle channel (320) and the first circumferential return hole (322) to form a plurality of return holes (322) from the first circumferential throttle channel (320).

9. The compressor exhaust gas oil structure according to claim 8, characterized in that a filter member (313) is provided between the axial throttle flow passage (320) and the oil return passage, and/or a filter member (313) is provided between two adjacent axial throttle flow passages (320); and/or the section of the axial throttling flow passage (320) is a circle with the radius d, and d is more than or equal to 0.5mm and less than or equal to 2mm.

10. The compressor discharge oil structure according to claim 8, wherein the first circumferential flow restriction (321) has a first opening facing the outside of the oil separation cylinder (300), a hoop (330) is sleeved on the outer circumferential side wall of the oil separation cylinder (300), and the hoop (330) can close the first opening so that two adjacent axial flow restriction (320) can be communicated by the first circumferential flow restriction (321); and/or the second circumferential throttling flow passage (322) is provided with a second opening facing to the outer side of the oil distributing cylinder body (300), and the high-low pressure cavity separation cover (310) is provided with a cover cylinder capable of closing the second opening so that two adjacent axial throttling flow passages (320) can be communicated by the second circumferential throttling flow passage (322).

11. The compressor discharge oil structure according to claim 10, wherein a plurality of grooves (331) are formed in an inner circumferential wall of the shroud ring (330), and the plurality of grooves (331) are disposed in one-to-one correspondence with the first openings, respectively, so that two adjacent axial throttle runners (320) can be communicated by the first circumferential throttle runner (321).

12. A compressor discharge oil structure according to claim 3, characterized in that an oil separation pipe (340) is further provided in the oil separation cylinder (300), and the air flow entering the oil separation cylinder (300) through the air inlet hole (305) can be discharged through the discharge pipe (a) after being separated again through the oil separation pipe (340).

13. The compressor discharge oil structure according to claim 4, wherein the axial second end of the oil separation cylinder (300) is an open end, and the discharge pipe (a) is inserted into the axial second end and is connected with the inner peripheral wall of the oil separation cylinder (300) in an interference fit manner through the expansion action of a steel ring (350); alternatively, the exhaust pipe (a) is connected to the cylinder peripheral wall of the oil separation cylinder (300).

14. A scroll compressor comprising the compressor discharge oil structure of any one of claims 1 to 13.

15. The scroll compressor of claim 14, wherein the scroll compressor is a horizontal scroll compressor.