Oil-gas separation structure and compressor with it

Abstract

This invention provides an oil-gas separation structure and a compressor having the same, comprising: an exhaust cover mounted on an end cover of the compressor, the exhaust cover having an exhaust chamber communicating with an exhaust port on the end cover, the exhaust chamber including a first connecting chamber and a second connecting chamber arranged separately along the arrangement direction of the exhaust cover and the end cover, the first connecting chamber being located on the side of the second connecting chamber near the exhaust port, the exhaust cover having a connecting channel communicating with both the first and second connecting chambers, and an exhaust port communicating with the second connecting chamber; a first oil separator pipe and a second oil separator pipe, the first oil separator pipe being installed in the first connecting chamber, the second oil separator pipe being installed in the second connecting chamber, and the first and second oil separator pipes being respectively connected to both ends of the connecting channel. The technical solution provided by this invention can solve the technical problem of poor oil-gas separation effect in existing oil-gas separation structures.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to an oil-gas separation structure and a compressor having the same. Background Technology

[0002] Currently, scroll compressors on the market have certain limitations in oil-gas separation technology. Although scroll compressors are widely used in air conditioning systems of new energy vehicles due to their compact structure, small size, high efficiency, and low noise, especially in pure electric vehicles, where microchannel heat exchangers have become the preferred heat exchange device to improve driving range, the small pipe diameter of microchannel heat exchangers can easily lead to excessive lubricating oil remaining in the pipes when the compressor's oil-gas separation effect is poor. This severely affects the flow and heat dissipation efficiency of the refrigerant in the pipes.

[0003] However, existing scroll compressors often have limited oil-gas separation channels and rely primarily on a single oil separator structure for separation. While this reduces the compressor's oil discharge rate to some extent, the oil separation effect is unstable under different speed conditions, especially at high speeds where the separation efficiency significantly decreases. Consequently, lubricating oil that fails to separate effectively during the oil-gas mixture enters the microchannel heat exchanger along with the high-pressure gas, reducing the refrigerant's heat dissipation efficiency. This not only affects the cooling or heating performance of the air conditioning system but also forces the compressor to operate at higher speeds to achieve the same effect, resulting in additional energy consumption and a reduction in the vehicle's overall driving range. Summary of the Invention

[0004] The main objective of this invention is to provide an oil-gas separation structure and a compressor having the same, so as to solve the technical problem of poor oil-gas separation effect in existing oil-gas separation structures.

[0005] To achieve the above objectives, according to one aspect of the present invention, an oil-gas separation structure is provided, comprising:

[0006] An exhaust cover is installed on the end cover of the compressor. The exhaust cover has an exhaust chamber that communicates with an air outlet on the end cover. The exhaust chamber includes a first communicating chamber and a second communicating chamber that are arranged separately along the arrangement direction of the exhaust cover and the end cover. The first communicating chamber is located on the side of the second communicating chamber closer to the air outlet. The exhaust cover is provided with a communicating channel that communicates with both the first communicating chamber and the second communicating chamber, and an exhaust port that communicates with the second communicating chamber.

[0007] A first oil distribution pipe and a second oil distribution pipe are installed in the first connecting cavity and the second oil distribution pipe is installed in the second connecting cavity. The first oil distribution pipe and the second oil distribution pipe are respectively connected to the two ends of the connecting channel.

[0008] Further, at least one of the first oil separator and the second oil separator includes helical fins, the helical fins extending along the extending direction of the first oil separator and / or the second oil separator and forming a helical separation channel; and / or,

[0009] The spiral fins are provided with an oleophobic coating.

[0010] Furthermore, the first oil distribution pipe includes:

[0011] First main body section;

[0012] The first spiral fin is disposed on the outer peripheral wall of the first main body. The first spiral fin extends along the extension direction of the first main body. The first spiral separation channel formed by the first spiral fin is disposed opposite to the air outlet. One end of the connecting channel is disposed opposite to the first spiral separation channel.

[0013] Furthermore, the first spiral fin has a first end and a second end that are disposed opposite to each other along the extension direction of the first main body, the first end being disposed opposite to the air outlet; the first main body is a first tube, the first tube having a first channel communicating with the first communicating cavity, a first oil outlet being disposed at one end of the first channel near the first end, and a first separation air outlet communicating with the first channel being disposed on the first tube, the first separation air outlet being disposed on one side of the first channel near the communicating channel, and the first separation air outlet communicating with the gap between the outer wall of the first tube and the wall surrounding the first communicating cavity.

[0014] Furthermore, a first oil passage hole is provided on the side of the first helical fin near the first end, penetrating the first helical fin; and / or,

[0015] The first separation outlet is spaced apart from the first spiral fin. The oil-gas separation structure also includes a separator, which is disposed between the first spiral fin and the first separation outlet to separate the first spiral separation channel from the first separation outlet.

[0016] Furthermore, the first oil distribution pipe includes a first pipe body and a first spiral fin. The first pipe body has a first channel, a first oil outlet, and a first separation vent. Both the first separation vent and the first oil outlet are connected to the first channel. The first separation vent is located on the side of the first channel close to the connecting channel. The first spiral fin is installed in the first channel and extends along the extension direction of the first channel. One end of the first spiral fin is positioned opposite to the first oil outlet.

[0017] Furthermore, the first pipe body includes a first pipe segment and a second pipe segment connected to each other, the outer wall of the second pipe segment being sealed to the wall surface surrounding the first communicating cavity; the first spiral fin is installed in the gap between the outer wall of the first pipe segment and the wall surface surrounding the first communicating cavity, or the first spiral fin is installed in at least a portion of the first pipe segment and inside the second pipe segment.

[0018] The first oil outlet is formed at the end of the first pipe section that is furthest from the second pipe section.

[0019] Furthermore, the first pipe body also includes a first transition pipe section, which is disposed between the first pipe section and the second pipe section, and the first separation outlet is disposed at the first transition pipe section;

[0020] Wherein, the outer diameter of the first pipe segment is smaller than the outer diameter of the second pipe segment; along the extension direction from the first pipe segment to the second pipe segment, the outer diameter of the first transition pipe segment gradually increases; and / or,

[0021] The inner diameter of the first pipe section is smaller than that of the second pipe section; along the extension direction from the first pipe section to the second pipe section, the inner diameter of the first transition pipe section gradually increases.

[0022] Furthermore, the second oil distribution pipe includes:

[0023] Second main body section;

[0024] The second spiral fin is disposed on the outer peripheral wall of the second main body. The second spiral fin extends along the extension direction of the second main body. The second spiral separation channel formed by the second spiral fin is disposed opposite to the communication channel. The second spiral separation channel is connected to the exhaust port.

[0025] Furthermore, the second main body is a second pipe body, which has a second channel and a second oil outlet and a second separate air outlet located at both ends of the second channel, respectively. The second separate air outlet is located on the side of the second oil outlet closer to the exhaust port.

[0026] Furthermore, the second pipe body includes a third pipe section and a fourth pipe section connected to each other. The fourth pipe section is sealed to the wall forming the second communicating cavity. The outer wall of the third pipe section is spaced apart from the wall forming the second communicating cavity. The second spiral fin is disposed on the outer wall of the third pipe section. A second oil passage hole is provided on the side of the second spiral fin near the second oil outlet.

[0027] Furthermore, the second pipe body also includes a second transition pipe section, which is disposed between the third pipe section and the fourth pipe section;

[0028] Wherein, the outer diameter of the third pipe segment is smaller than the outer diameter of the fourth pipe segment; along the extension direction from the third pipe segment to the fourth pipe segment, the outer diameter of the second transition pipe segment gradually increases; and / or,

[0029] The inner diameter of the third pipe section is smaller than that of the fourth pipe section; along the extension direction from the third pipe section to the fourth pipe section, the inner diameter of the second transition pipe section gradually increases.

[0030] Furthermore, the exhaust cover is provided with an oil return port and an oil return hole at intervals. The two ends of the oil return port are respectively connected to the first connecting cavity and the second connecting cavity, and the two ends of the oil return hole are respectively connected to the second connecting cavity and the oil return channel on the compressor.

[0031] Furthermore, the oil-gas separation structure also includes:

[0032] A switching valve is installed at the oil return port to open or close the oil return port.

[0033] Furthermore, the exhaust cover includes:

[0034] A first mounting part, wherein the first mounting part is provided with the first communicating cavity;

[0035] The second mounting part is provided with the second communicating cavity;

[0036] The first mounting part and the second mounting part are detachably connected. The first mounting part is mounted on the end cover of the compressor, and the second mounting part is located on the side of the first mounting part away from the end cover.

[0037] According to another aspect of the present invention, a compressor is provided, comprising:

[0038] The body and the end cap, wherein the end cap is provided with an air vent;

[0039] The oil-gas separation structure described above is installed on the end cap.

[0040] By applying the technical solution of this invention, secondary separation of the oil-gas mixture is achieved through the installation of dual oil separators (a first oil separator and a second oil separator), significantly improving oil-gas separation efficiency and effectively reducing the oil content in the exhaust gas. This, in turn, increases the compressor's cooling capacity and reduces power consumption, which is particularly beneficial for air conditioning systems in new energy vehicles. The spiral fins on the first and second oil separators not only aid in oil-gas separation but also dissipate heat from the exhaust gas, effectively reducing the exhaust temperature, ensuring system reliability, and extending system lifespan. The placement of the first and second oil passages allows oil droplets accumulated on the spiral fins to quickly drip into the first oil storage chamber (where the first oil separator is not installed) in the first connecting cavity and the second oil storage chamber (where the second oil separator is not installed) in the second connecting cavity, preventing the oil droplets from being carried away by the gas again, further reducing the oil content in the exhaust gas and improving the overall performance of the compressor. The removable exhaust cover facilitates maintenance and replacement, improving the compressor's maintenance convenience and operational flexibility. The on / off valve is located at the oil return port, allowing adjustment of the oil return path based on actual operating conditions. This optimizes the compressor's operation, ensures lubrication and cooling of moving parts, reduces power consumption, and improves overall reliability. The oil-gas separation structure and compressor described in this application are particularly suitable for electric vehicle air conditioning systems, effectively increasing the vehicle's driving range, reducing energy consumption, and contributing positively to environmental protection and energy conservation. Attached Figure Description

[0041] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0042] Figure 1 A partial structural schematic diagram of a compressor provided according to an embodiment of the present invention is shown;

[0043] Figure 2 It shows Figure 1 Enlarged view of some of the structures in the image;

[0044] Figure 3 The embodiments provided according to the present invention are shown. Figure 2 Exploded view of part of the structure;

[0045] Figure 4 A cross-sectional view of a first oil distribution pipe provided according to an embodiment of the present invention is shown;

[0046] Figure 5 A schematic diagram of the structure of a first oil distribution pipe according to an embodiment of the present invention is shown;

[0047] Figure 6A cross-sectional view of a second oil distribution pipe provided according to an embodiment of the present invention is shown;

[0048] Figure 7 A schematic diagram of the structure of the second oil distribution pipe provided according to an embodiment of the present invention is shown;

[0049] Figure 8 A cross-sectional view of a first oil distribution pipe provided according to another embodiment of the present invention is shown.

[0050] The above figures include the following reference numerals:

[0051] 1. Housing; 2. Inlet; 3. Motor assembly; 4. Bracket; 5. Moving scroll plate; 6. Stationary scroll plate; 7. End cap; 10. Outlet; 11. Stationary scroll plate exhaust port; 12. First oil storage chamber; 13. Oil filter screen; 14. First oil return channel; 15. Second oil return channel; 16. Wear-resistant plate; 161. Wear-resistant plate oil return channel; 17. Back pressure chamber; 19. First sealing ring; 20. Second sealing ring; 21. Fastening bolt; 22. Second oil storage chamber; 23. Switch valve; 24. Weld; 25. Separator;

[0052] 71. First sealing groove; 72. Second sealing groove;

[0053] 73. Oil return port; 731. Front cover oil return hole; 732. Exhaust cover oil return hole; 75. First mounting part;

[0054] 8. Exhaust cover; 80. Connecting channel; 81. Exhaust cover air inlet; 82. Front cover exhaust port; 83. Exhaust port; 84. Second mounting part;

[0055] 9. First oil distribution pipe; 91. First gas outlet; 92. First oil outlet; 93. First spiral fin; 931. First oil passage; 94. Closed end; 95. First main body; 951. First channel; 952. First pipe section; 953. Second pipe section; 954. First transition pipe section;

[0056] 18. Second oil separator pipe; 181. Second gas outlet; 182. Second oil outlet; 183. Second spiral fin; 1831. Second oil passage; 184. Second main body; 1841. Second channel; 1842. Third pipe section; 1843. Fourth pipe section; 1844. Second transition pipe section. Detailed Implementation

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] like Figures 1 to 8As shown, an embodiment of the present invention provides an oil-gas separation structure, including: an exhaust cover 8, a first oil separator 9, and a second oil separator 18. The exhaust cover 8 is installed on the end cover 7 of the compressor. The exhaust cover 8 has an exhaust chamber communicating with an exhaust port 10 on the end cover 7. The exhaust chamber includes a first connecting chamber and a second connecting chamber arranged separately along the arrangement direction of the exhaust cover 8 and the end cover 7. The first connecting chamber is located on the side of the second connecting chamber near the exhaust port 10. The exhaust cover 8 is provided with a connecting channel 80 communicating with both the first and second connecting chambers and an exhaust port 83 communicating with the second connecting chamber. The first oil separator 9 is installed in the first connecting chamber, and the second oil separator 18 is installed in the second connecting chamber. The first oil separator 9 and the second oil separator 18 are respectively connected to the two ends of the connecting channel 80.

[0059] The technical solution provided by this invention divides the internal space of the exhaust chamber into a first connecting chamber and a second connecting chamber along the exhaust direction by using an exhaust cover 8 installed on the compressor end cover 7. A connecting channel 80 connects the two chambers, and an exhaust port 83 is connected to the second connecting chamber, thus achieving a two-stage separation process for the oil-gas mixture. First, the oil-gas mixture undergoes preliminary separation through the first oil separator 9 in the first connecting chamber. Oil droplets are thrown out by centrifugal force to the first oil storage chamber 12 (where the first oil separator 9 is not installed) in the first connecting chamber, while the gas continues to enter the second connecting chamber along the connecting channel 80. Subsequently, the incompletely separated oil droplets are further separated in the second oil separator 18 in the second connecting chamber, and finally collect in the second oil storage chamber 22 (where the second oil separator 18 is not installed) in the second connecting chamber. Through this two-stage separation, the efficiency of oil-gas separation is significantly improved, effectively reducing the oil content in the compressor exhaust, preventing lubricating oil from occupying too much space in the microchannel heat exchanger, and ensuring good heat exchange performance of the heat exchanger. In addition, the oil-gas separation structure in this embodiment can effectively reduce the exhaust temperature. Through the heat exchange effect of the spiral fins, it further optimizes the overall reliability of the compressor operation and the system life, solves the technical problems of low oil-gas separation efficiency, high exhaust temperature and poor oil return effect in the prior art, and realizes the improvement of compressor operating performance.

[0060] Specifically, at least one of the first oil separator 9 and the second oil separator 18 includes a spiral fin, which extends along the extension direction of the first oil separator 9 and / or the second oil separator 18 and forms a spiral separation channel.

[0061] At least one of the first oil separator 9 and the second oil separator 18 is equipped with spiral fins. These spiral fins form a spiral separation channel along the extension direction of the oil separator. When the oil-gas mixture enters the oil separator tangentially at a certain speed, the spiral separation channel causes the oil-gas mixture to move in a spiral manner, increasing the separation path between gas and oil droplets, thereby improving the oil-gas separation efficiency.

[0062] Specifically, the spiral fins are provided with an oleophobic coating to facilitate the drainage of oil on the spiral fins so that it can fall smoothly into the first or second connecting cavity.

[0063] In this embodiment, the first oil distribution pipe 9 includes: a first main body 95 and a first spiral fin 93. The first spiral fin 93 is disposed on the outer peripheral wall of the first main body 95. The first spiral fin 93 extends along the extension direction of the first main body 95. The first spiral separation channel formed by the first spiral fin 93 is disposed opposite to the air outlet 10. One end of the connecting channel 80 is disposed opposite to the first spiral separation channel.

[0064] The first oil separator 9 includes a first main body 95 and a first spiral fin 93. The first spiral fin 93 is disposed on the outer peripheral wall of the first main body 95 and extends along the extending direction of the first main body 95. This arrangement ensures that the first spiral separation channel formed by the first spiral fin 93 is opposite to the air outlet 10, allowing for efficient separation of the oil-gas mixture as it flows through. One end of the connecting channel 80 is opposite to the first spiral separation channel, ensuring that the gas can be smoothly discharged from the first oil separator 9 after the oil-gas separation process. The oil passage holes on the first spiral fin 93 can accelerate the accumulation and falling of oil droplets on the spiral fins, effectively preventing the oil droplets from being carried away by the gas again, thereby reducing the oil content in the exhaust. Overall, this oil-gas separation structure can significantly improve separation efficiency, reduce exhaust temperature, ensure the reliability of system operation and extend the service life of the compressor, while optimizing the return path and efficiency of the refrigeration oil. In an alternative embodiment, the spiral fins can exist as an inner wall, and the heat dissipation of the internal fluid is achieved through the heat conduction of the oil separator, thus achieving the same purpose of reducing exhaust temperature and improving oil-gas separation effect.

[0065] Specifically, the first helical fin 93 and the first communicating cavity can be a clearance fit, an interference fit, or a partial interference fit with a partial clearance fit. A clearance fit is beneficial for the installation of the first helical fin 93.

[0066] Specifically, the first spiral fin 93 has a first end and a second end that are arranged opposite to each other along the extension direction of the first main body 95, and the first end is arranged opposite to the air outlet 10; the first main body 95 is a first tube body, the first tube body has a first channel 951 that communicates with the first connecting cavity, a first oil outlet 92 is provided at one end of the first channel 951 near the first end, and a first separation air outlet 91 that communicates with the first channel 951 is also provided on the first tube body, the first separation air outlet 91 is provided on one side of the first channel 951 near the connecting channel 80, and the first separation air outlet 91 communicates with the gap between the outer wall of the first tube body and the wall surface that forms the first connecting cavity.

[0067] The first spiral fin 93 has a first end and a second end that are opposite to each other along the extending direction of the first main body 95, with the first end opposite to the first separation outlet. The first main body 95 is a first tube body, which has a first channel 951 that communicates with the first connecting cavity inside the spiral fin of the first oil separator 9. The oil outlet of the first oil separator 9 is provided at one end of the first channel 951 near the first end. In addition, the first tube body is also provided with a first separation outlet 91 that communicates with the first channel 951. The first separation outlet 91 is located on the side of the first channel 951 near the connecting channel 80 and communicates with the gap between the outer wall of the first tube body and the wall forming the first connecting cavity. With this configuration, when the oil-gas mixture undergoes the first gas-liquid separation inside the first oil separator 9, the gas is discharged through the first separation outlet 91, while the separated lubricating oil enters the oil storage cavity through the first oil outlet. At the same time, the spiral fin of the first oil separator 9 dissipates heat and cools the oil-gas mixture as it flows through, reducing the exhaust temperature, improving the heat exchange efficiency of the system, and ensuring the stable operation of the system. This secondary separation structure not only significantly reduces the oil content in the exhaust gas and enhances the overall performance of the compressor, but also promotes rapid oil droplet recirculation through the oil passages on the spiral fins, further optimizing the compressor's lubrication and cooling. This demonstrates the professionalism and innovation of this technical solution in improving separation efficiency and system reliability. In other embodiments not shown in the figure, the spiral fins can also be directly disposed on the inner wall of the first oil separator 9 to enhance heat exchange, or the number and position of the oil passages can be changed to adapt to different operating conditions and improve the speed and efficiency of oil droplet recirculation. These adjustments make this embodiment more flexible and better able to meet the requirements of high-efficiency oil-gas separation in complex environments.

[0068] Specifically, a first oil passage 931 is provided on the side of the first spiral fin 93 near the first end, so that the oil at the first spiral fin 93 can be smoothly discharged through the first oil passage 931, which facilitates the collection of the oil.

[0069] In this embodiment, a first oil storage chamber 12 is formed at the location where the first oil distribution pipe 9 is not installed in the first connecting cavity. The oil from the first oil distribution pipe 9 enters the first oil storage chamber 12 through the oil outlet and the first oil passage 931, so that the oil can be collected through the first oil storage chamber 12. Correspondingly, a second oil storage chamber 22 is formed at the location where the second oil distribution pipe 18 is not installed in the second connecting cavity.

[0070] Specifically, the first separation outlet 91 is spaced apart from the first spiral fin 93. The oil-gas separation structure also includes a separator 25, which is disposed between the first spiral fin 93 and the first separation outlet 91 to separate the first spiral separation channel from the first separation outlet 91. This structural arrangement prevents airflow from entering the first separation outlet 91 without sufficient separation within the first spiral separation channel, thereby improving the separation effect.

[0071] Specifically, in this embodiment, the oil-gas mixture flows through the first spiral separation channel and enters the first pipe body, and then enters the connecting channel 80 through the first oil-gas separation port.

[0072] like Figure 8 As shown, in another embodiment of the first oil distribution pipe 9, the first oil distribution pipe 9 includes a first pipe body and a first spiral fin 93. The first pipe body has a first channel 951, a first oil outlet 92 and a first separation vent 91. The first separation vent 91 and the first oil outlet 92 are both connected to the first channel 951. The first separation vent 91 is located on the side of the first channel 951 near the connecting channel 80. The first spiral fin 93 is installed in the first channel 951 and extends along the extension direction of the first channel 951. One end of the first spiral fin 93 is disposed opposite to the first oil outlet 92.

[0073] This structural design allows the oil-gas mixture to undergo a spiral motion under the guidance of the first spiral fins 93 when entering the first oil separator 9, achieving initial oil-gas separation through centrifugal force. The separated gas continues to advance through the first separation outlet 91, while the oil flows along the first spiral fins 93 towards the first oil outlet 92, eventually dripping into the first oil storage chamber 12. The first spiral fins 93 also have oil passages, which facilitate the accumulation and sliding of oil droplets on the spiral fins, further reducing the possibility of gas carrying oil and ensuring a highly efficient oil-gas separation process. Furthermore, the spiral fins also help dissipate heat from the gas during separation, lowering the gas temperature and thus improving the reliability of the system and extending the service life of the equipment. In an alternative embodiment, the first spiral fins 93 can be arranged not only on the outer wall but also on the inner wall of the first oil separator 9. By absorbing heat from the internal fluid and conducting it to the outer wall, they achieve heat dissipation, ensuring good heat dissipation and oil-gas separation performance even when arranged internally. Overall, the dual oil distribution pipe structure in this embodiment, combined with the spiral fins and oil passages, significantly improves the oil-gas separation efficiency and the utilization efficiency of refrigeration oil. It also effectively reduces the exhaust temperature, playing a positive role in improving the overall performance of the compressor and extending its service life.

[0074] In this embodiment, the first pipe body includes a first pipe segment 952 and a second pipe segment 953 connected to each other. The outer wall of the second pipe segment 953 is sealed to the wall forming the first communicating cavity. A first spiral fin 93 is installed in the gap between the outer wall of the first pipe segment 952 and the wall forming the first communicating cavity, or the first spiral fin 93 is installed in at least a portion of the first pipe segment 952 and the second pipe segment 953. The end of the first pipe segment 952 away from the second pipe segment 953 forms a first oil outlet 92.

[0075] The outer wall of the second pipe section 953 is sealed to the wall forming the first connecting cavity, ensuring effective separation of the oil-gas mixture as it passes through the first oil separator 9. A first helical fin 93 is disposed in the gap between the outer wall of the first pipe section 952 and the wall forming the first connecting cavity, or the first helical fin 93 is arranged in at least a portion of the first pipe section 952 and within the second pipe section 953. This structural arrangement increases the flow path of the oil-gas mixture within the first oil separator 9, promoting the separation of oil droplets and gas through helical motion. A first oil outlet 92 is formed at the end of the first pipe section 952 furthest from the second pipe section 953. This outlet facilitates the rapid discharge of separated lubricating oil, preventing oil droplets from being carried away by gas again, thereby reducing the oil content in the exhaust gas. The entire oil-gas separation structure achieves secondary separation through a dual oil pipe configuration, improving the efficiency of oil-gas separation. The spiral fins reduce exhaust temperature while separating oil droplets, ensuring compressor performance and system lifespan. The oil passages (including the first and second passages) promote rapid dripping of oil droplets, preventing them from being discharged again with the gas. These structures work together to enhance the overall performance of the oil-gas separation structure, reduce compressor power consumption, and ensure the efficient operation of the air conditioning system in new energy vehicles.

[0076] Specifically, the end of the second pipe section 953 that is furthest from the first pipe section 952 is a closed end 94, and exhaust cannot be carried out through the closed end 94.

[0077] Furthermore, the first pipe body also includes a first transition pipe section 954, which is disposed between the first pipe section 952 and the second pipe section 953, and a first separation outlet 91 is disposed at the first transition pipe section 954; wherein, the outer diameter of the first pipe section 952 is smaller than the outer diameter of the second pipe section 953; the outer diameter of the first transition pipe section 954 gradually increases along the extension direction from the first pipe section 952 to the second pipe section 953; and / or, the inner diameter of the first pipe section 952 is smaller than the inner diameter of the second pipe section 953; the inner diameter of the first transition pipe section 954 gradually increases along the extension direction from the first pipe section 952 to the second pipe section 953.

[0078] By adjusting the diameter of the pipe section, the gas flow rate and direction can be effectively controlled, enhancing the oil-gas separation effect. Inside the first oil separator pipe 9, as the gas flows through the transition pipe section with a gradually increasing diameter, the flow rate gradually decreases, which facilitates the separation of oil droplets from the gas flow and their sliding down the pipe wall into the oil storage chamber. Simultaneously, this gradual diameter change also contributes to a reduction in gas temperature because the increased heat dissipation area of ​​the pipe wall enhances heat exchange between the gas and the pipe wall, thereby further reducing the exhaust temperature and improving the overall performance and lifespan of the compressor. In an alternative embodiment, this gradual diameter change can also be achieved through the design of the gas path within the pipe, for example, by increasing the density of the spiral fins or changing their shape, which can similarly achieve the purpose of controlling the gas flow rate and direction, enhancing oil-gas separation, and improving heat dissipation.

[0079] Specifically, the second oil distribution pipe 18 includes: a second main body 184 and a second spiral fin 183. The second spiral fin 183 is disposed on the outer peripheral wall of the second main body 184 and extends along the extension direction of the second main body 184. The second spiral separation channel formed by the second spiral fin 183 is disposed opposite to the connecting channel 80 and is connected to the exhaust port 83.

[0080] The first oil separator 9 includes a first main body 95 and a first spiral fin 93. The first spiral fin 93 is disposed on the outer peripheral wall of the first main body 95 and extends along the extending direction of the first main body 95. This arrangement causes the first spiral separation channel formed by the first spiral fin 93 to be positioned opposite to the air outlet 10, allowing for efficient separation of the oil-gas mixture as it flows through.

[0081] This structural design enables a secondary separation process for the oil-gas mixture. After the gas undergoes initial separation through the first oil separator 9, the remaining gas, containing a small amount of oil, continues to flow to the second oil separator 18. As the gas spirals within the second spiral separation channel, oil droplets are further separated from the gas and fall into the second oil storage chamber 22, thereby reducing the oil content in the gas. The second spiral fins 183 not only enhance the oil-gas separation effect but also increase the gas contact area via the spiral path, achieving heat dissipation of the exhaust gas, helping to reduce the exhaust temperature, ensuring stable operation of the compressor system, and extending equipment life. Furthermore, the presence of oil passages accelerates the aggregation and falling of oil droplets on the spiral fins, effectively preventing the oil droplets from being carried away by the gas again, ensuring effective oil recovery and reuse. Overall, through this two-stage oil-gas separation and heat dissipation design, this embodiment significantly improves oil separation efficiency, reduces energy consumption, and directly contributes to improving the overall performance and economy of the vehicle's air conditioning system. In other embodiments not shown, the position and shape of the second helical fin 183 can be adjusted according to actual needs, such as placing it on the inner wall of the oil separator pipe, or changing its helical angle and width to optimize separation effect and heat dissipation efficiency. These variable design parameters allow for flexible adaptation to different operating conditions and requirements, ensuring optimal oil-gas separation performance. Simultaneously, integrating the front cover, exhaust cover 8, first oil separator pipe 9, and second oil separator pipe 18 into a single 3D-printed part reduces assembly workload, simplifies the manufacturing process, and improves the reliability and consistency of the entire oil-gas separation structure. In practical applications, this optimization effectively reduces potential leakage points, improves the overall energy efficiency of the system, and provides a solid foundation for the efficient operation of the compressor.

[0082] Specifically, the second main body 184 is a second pipe body, which has a second channel 1841 and a second oil outlet 182 and a second separation outlet 181 located at both ends of the second channel 1841, respectively. The second separation outlet 181 is located on the side of the second oil outlet 182 closer to the exhaust port 83. This structural arrangement realizes a two-stage oil-gas separation process. The gas initially separated by the first oil separator 9 re-enters the second oil separator 18 for secondary separation, further reducing the oil content in the exhaust. The relative positions of the second oil outlet 182 and the second separation outlet 181 ensure the rationality of the gas flow direction, which helps the gas to more effectively separate oil droplets within the second pipe body. The gas separated again by the second oil separator 18 is discharged from the second separation outlet 181, while the separated oil is collected through the second oil outlet 182 and then returned to the compressor through a reasonable oil return path to provide lubrication for the compressor's moving parts. This two-stage separation not only improves the thoroughness of oil-gas separation, but also accelerates the backflow of oil droplets through the oil passages on the spiral fins, effectively preventing oil droplets from being re-entered by gas, and significantly reducing exhaust temperature. This, in turn, improves the energy efficiency ratio of the entire air conditioning system and the operational reliability of the compressor. In an alternative embodiment, the structure and function of the second oil separator 18 can remain consistent, but its specific shape and installation method can be adjusted according to actual needs to adapt to different compressor designs and operating environments.

[0083] Specifically, the airflow separated by the second spiral separation channel flows from the second oil outlet 182 of the second pipe body into the second pipe body, and flows out from the second separation outlet 181 of the second pipe body to the exhaust outlet 83.

[0084] In this embodiment, the second pipe body includes a third pipe section 1842 and a fourth pipe section 1843 connected to each other. The fourth pipe section 1843 is sealed to the wall forming the second communicating cavity. The outer wall of the third pipe section 1842 is spaced apart from the wall forming the second communicating cavity. The second spiral fin 183 is disposed on the outer wall of the third pipe section 1842. A second oil passage hole 1831 is provided on the side of the second spiral fin 183 near the second oil outlet 182.

[0085] The fourth pipe section 1843 is sealed to the wall surrounding the second connecting cavity to ensure that the oil-gas mixture during the exhaust process can smoothly enter the second oil separator 18 for secondary oil-gas separation. The outer wall of the third pipe section 1842 is spaced apart from the wall surrounding the second connecting cavity. This arrangement provides sufficient space for the spiral fins, allowing the gas separated from the first oil separator 9 to spiral on the second spiral fins 183 of the second oil separator 18, further reducing the oil content in the gas. The second spiral fins 183 are located on the outer wall of the third pipe section 1842. Their structure not only helps cool the gas and reduce the exhaust temperature, but also allows oil droplets to collect along the spiral path and fall quickly into the second oil storage chamber 22 through the oil passages on the spiral fins, preventing the oil droplets from being carried up again, thus improving the oil return efficiency and the thoroughness of oil-gas separation. This dual oil separator arrangement, combined with the characteristics of the spiral fins and oil passages, effectively improves the oil-gas separation effect of the scroll compressor, reduces the oil content in the exhaust, and helps reduce system power consumption, improving overall operating efficiency and reliability. In other embodiments not shown in the figure, the oil-gas separation performance can be optimized by adjusting the structure of the spiral fins and the number and distribution of oil passages to meet the needs under different operating conditions. Furthermore, welding ensures the sealing between the second oil separator 18 and the exhaust cover 8, guaranteeing smooth oil-gas separation and oil return processes, further improving the compressor's performance.

[0086] Specifically, the second pipe body further includes a second transition pipe section 1844, which is disposed between the third pipe section 1842 and the fourth pipe section 1843; wherein, the outer diameter of the third pipe section 1842 is smaller than the outer diameter of the fourth pipe section 1843; the outer diameter of the second transition pipe section 1844 gradually increases along the extension direction from the third pipe section 1842 to the fourth pipe section 1843; and / or, the inner diameter of the third pipe section 1842 is smaller than the inner diameter of the fourth pipe section 1843; the inner diameter of the second transition pipe section 1844 gradually increases along the extension direction from the third pipe section 1842 to the fourth pipe section 1843.

[0087] Specifically, the outer diameter of the third pipe section 1842 is smaller than that of the fourth pipe section 1843, while the outer diameter of the second transition pipe section 1844 gradually increases along the extension direction from the third pipe section 1842 to the fourth pipe section 1843. Similarly, the inner diameter of the third pipe section 1842 is also smaller than that of the fourth pipe section 1843, and the inner diameter of the second transition pipe section 1844 gradually increases accordingly. This arrangement ensures a smooth transition of medium flow from the third pipe section 1842 to the fourth pipe section 1843, effectively avoiding turbulence and pressure drop that may occur when the fluid changes between different pipe diameters, and improving the separation efficiency of the oil-gas mixture in the oil separator. At the same time, the gradually changing pipe section diameter is conducive to the adhesion and falling of oil droplets on the spiral fins, further promoting the separation of oil and gas, and ensuring that oil droplets can more smoothly enter the oil storage chamber through the oil passage, rather than being re-entrained into the gas. Furthermore, this structure enhances heat dissipation and reduces exhaust temperature, ensuring efficient and stable compressor operation while improving overall system energy efficiency and reliability. In other embodiments not shown, the shape and size of the second transition section 1844 can also be varied in different ways to adapt to oil-gas separation requirements under different operating conditions, enhancing system adaptability and flexibility.

[0088] Furthermore, the exhaust cover 8 is provided with an oil return port 73 and an oil return hole at intervals. The two ends of the oil return port 73 are connected to the first connecting cavity and the second connecting cavity, respectively. The two ends of the oil return hole are connected to the second connecting cavity and the oil return channel on the compressor, respectively.

[0089] The exhaust cap 8 is provided with an oil return port 73 and an oil return hole at intervals. The two ends of the oil return port 73 are connected to the first and second connecting chambers, respectively, while the two ends of the oil return hole are connected to the second connecting chamber and the oil return channel on the compressor, respectively. This arrangement ensures that after secondary oil-gas separation, the lubricating oil can smoothly enter the first connecting chamber through the oil return port 73, then collect in the second connecting chamber to the oil return hole, and finally be guided to the compressor's oil return channel. Through this structure, the separated lubricating oil can be effectively returned to the compressor, achieving continuity and efficiency in the oil return process, thereby ensuring sufficient lubrication of the compressor's moving parts, enhancing the overall operational stability of the compressor, and extending its service life. Furthermore, this clear division of the oil return path avoids improper distribution of lubricating oil in the system, helping to maintain the efficient operation of the entire air conditioning system, especially in new energy vehicles, where it has a positive effect on improving range. In other embodiments not shown in the figure, the position and shape of the oil return port 73 and the oil return hole can be flexibly adjusted to adapt to the needs of different compressor designs, further optimizing the oil return process and improving the overall performance of the system. The oil return hole ensures the optimal flow of lubricating oil under specific operating conditions, achieving an effective combination of lubrication and cooling, and providing a more stable and reliable working environment for the compressor. The combined use of the oil return connector 73 and the oil return hole not only improves the efficiency of lubricating oil recovery but also effectively reduces energy loss caused by lubricating oil retention, promoting smooth operation of the compressor under dynamic conditions. In other embodiments not shown in the figure, by changing the specific dimensions and angles of the oil return connector 73 and the oil return hole, the flow path of the lubricating oil can be further optimized, achieving more precise control and management, meeting the special needs of different application scenarios, and laying a solid foundation for the efficient and energy-saving operation of the compressor. In other embodiments not shown in the figure, the oil return hole can also be designed with a gradually changing diameter to adapt to the flow characteristics of lubricating oil under different pressure and temperature conditions, ensuring a smooth and efficient oil return process. In this way, the compressor can maintain good lubricating oil circulation under various operating conditions, thereby improving overall operating efficiency and reliability.

[0090] Specifically, the oil return port 73 includes a front cover oil return hole 731 and an exhaust cover oil return hole 732.

[0091] In other embodiments not shown in the figure, an auxiliary oil return channel can be added to further enhance the recovery and distribution capabilities of lubricating oil and optimize the internal lubrication system of the compressor. This design concept is not limited to the dual-oil-pipe structure but can also be applied to other types of oil-gas separation devices to improve their oil return capacity and system compatibility. In other embodiments not shown in the figure, the geometry of the oil return port 73 can be a curve, a broken line, or other complex form to adapt to the requirements of different compressor designs and operating conditions, achieving optimal flow path planning for the lubricating oil. Through these improvements, the oil-gas separation performance of the compressor is significantly enhanced, while also ensuring the efficient recovery and reuse of lubricating oil, which is of great significance for improving the energy efficiency ratio and operating economy of air conditioning systems, especially those for new energy vehicles. In other embodiments not shown in the figure, the design of the oil return port 73 and the oil return hole can incorporate fluid dynamics optimization principles. For example, through computational fluid dynamics analysis, the aperture, shape, and layout can be finely designed to improve the flow efficiency of the lubricating oil and the oil-gas separation effect, achieving better overall efficiency of the compressor. Through the above settings, the compressor can maintain stable oil-gas separation performance and lubricating oil circulation under different operating conditions, effectively reducing power consumption and improving cooling or heating efficiency. Simultaneously, it reduces the risk of blockage in the microchannel heat exchanger, improving the driving range of new energy vehicles and the overall efficiency of the air conditioning system. In other embodiments not shown in the figure, a filter device can be added between the oil return port 73 and the oil return hole to purify impurities in the lubricating oil, protect critical compressor components from wear, and further improve system reliability. In other embodiments not shown in the figure, the parameters of the oil return port 73 and the oil return hole can be flexibly adjusted according to the actual application scenario to achieve optimal lubricating oil management and oil-gas separation effects, promoting energy conservation and emission reduction goals for the air conditioning system and even the entire automotive industry. In other embodiments not shown in the figure, the edge of the oil return port 73 can be set to a toothed shape or other special shape to increase the friction between the lubricating oil and the wall surface, promoting faster oil droplet detachment from the second oil separator 18 and entry into the oil return channel, improving oil return efficiency. In this way, the compressor can not only more effectively separate lubricating oil and refrigerant but also maintain a high-efficiency operating state with low power consumption, bringing significant energy-saving and environmental benefits to the automotive air conditioning system.

[0092] Specifically, the oil-gas separation structure also includes a switching valve 23, located at the oil return port 73, to open or close the oil return port 73 for precise control of its open or closed state. This configuration allows for timely adjustment of the oil return flow based on system operating conditions, ensuring that the internal lubricating oil level of the compressor is maintained at an optimal level. This avoids poor lubrication due to insufficient lubricating oil and prevents excessive lubricating oil discharge from affecting oil-gas separation efficiency. The presence of the switching valve 23 enables the oil-gas separation structure to have adaptive control capabilities, maintaining efficient oil-gas recovery and separation under different operating conditions, thereby optimizing the overall operating performance of the compressor and extending its service life. As system requirements change, the switching valve 23 can dynamically adjust the oil return process, ensuring the recycling of lubricating oil, reducing energy consumption, and improving the system's energy efficiency ratio. In alternative embodiments, the design of this switching valve 23 can be diversified, such as using a solenoid valve or a mechanical valve, to meet specific needs in different scenarios, further enhancing the functionality and applicability of the oil-gas separation structure. Specifically, the switching valve 23 is a one-way valve.

[0093] Specifically, the exhaust cover 8 includes a first mounting portion 75 and a second mounting portion 84. The first mounting portion 75 has a first communicating cavity, and the second mounting portion 84 has a second communicating cavity. The first mounting portion 75 and the second mounting portion 84 are detachably connected. The first mounting portion 75 is mounted on the compressor end cover 7, and the second mounting portion 84 is located on the side of the first mounting portion 75 away from the end cover 7. Specifically, the first mounting portion 75 and the second mounting portion 84 are detachably connected. The first mounting portion 75 is mounted directly onto the compressor end cover 7, while the second mounting portion 84 is located opposite the first mounting portion 75, away from the end cover 7. This arrangement not only facilitates the integration and maintenance of the oil-gas separation structure but also optimizes the oil-gas flow path, ensuring that the oil-gas mixture, after initial separation by the first oil separator 9, can smoothly enter the second oil separator 18 for secondary separation, thereby effectively improving the efficiency of oil-gas separation. The spiral fins of the first oil separator 9 and the second oil separator 18 not only achieve efficient oil droplet separation but also reduce gas temperature through heat dissipation, ensuring the compressor's operational stability and system efficiency. The oil passage accelerates oil droplet reflux, reducing the re-mixing of oil and gas during the exhaust process, thereby lowering the overall exhaust oil content and improving system reliability and service life. Through the rational layout of the above structure, the oil-gas separation structure in this embodiment achieves efficient oil-gas separation, gas heat dissipation, and rapid lubricating oil reflux.

[0094] The oil-gas separation structure provided in this embodiment utilizes the first oil passage 931 and the second oil passage 1831 on the first spiral fin 93 and the second spiral fin 183 to promote the rapid descent of oil droplets, ensuring that the oil droplets can smoothly return to the oil pan without being re-entrained into the gas flow. This optimizes the oil return process and reduces the oil content in the exhaust gas, contributing to the stable operation of the system and extending the service life of the compressor. This structure not only achieves efficient oil-gas separation but also further reduces the exhaust temperature through the heat dissipation effect of the spiral fins, ensuring the reliability and lifespan of the system. In other embodiments not shown, the spiral fins can also be disposed on the inner wall of the oil separator pipe. Although this changes the mode of heat transfer, relying mainly on the thermal conductivity of the oil separator pipe itself for heat dissipation, it still effectively achieves the purpose of oil-gas separation and cooling, demonstrating the versatility and adaptability of the invention. Furthermore, by adjusting the number and position of the oil passages, the descent speed of the oil droplets can be enhanced, further improving the oil return efficiency. This reflects the flexibility of the invention in handling details to meet the needs of different application scenarios. In terms of overall structure, the oil separator pipe, front cover (also known as end cover 7), and exhaust cover 8 are integrally formed using 3D printing, aiming to reduce the number of assembly parts and simplify the production process. This is a significant advantage of this embodiment. In summary, the arrangement of the spiral fins and oil passages together constitute the core advantage of the oil-gas separation structure of this invention, achieving efficient separation, rapid oil return, and effective heat dissipation, significantly improving the overall performance and operational reliability of the scroll compressor. In subsequent production applications, these technical features will undoubtedly become key factors in improving compressor efficiency. Of course, there are many possibilities for variations in the arrangement of the spiral fins and the design of the oil passages, providing ample room for future product improvements.

[0095] In practical applications, adjusting these parameters according to specific needs will result in superior system performance. For example, the aperture of the helical fins can be selected in... 1mm to Within a 5mm range, effective oil droplet separation is ensured while maintaining smooth gas flow, achieving the optimal balance.

[0096] The pairing of the first oil passage holes 931 on the first spiral fin and the pairing of the second oil passage holes 1831 on the second spiral fin 183 more effectively promotes the aggregation and falling of oil droplets, accelerates the oil return process, and ensures the stability of system operation. In terms of overall design, the components work closely together to form a complete oil-gas separation system, which not only improves separation efficiency and reduces exhaust temperature but also simplifies the structure and reduces the number of parts, providing strong support for the optimization and upgrading of electric vehicle air conditioning systems. By adopting the oil-gas separation structure proposed in this embodiment, the scroll compressor can achieve lower power consumption and better system reliability while maintaining high efficiency, thereby improving the overall performance of the vehicle and the user experience.

[0097] Based on this, through fine-tuning of relevant parameters, this invention can adapt to more working environments and operating conditions, applicable to scroll compressors and also to the field of electric vehicle air conditioning. The oil-gas separation structure of this invention and its application in scroll compressors marks a breakthrough in improving compressor performance, reducing energy consumption, and optimizing system operation, thus enhancing the performance of air conditioning systems in new energy vehicles. This innovation not only significantly improves the driving range of electric vehicles but also enhances the overall efficiency of the air conditioning system, thereby achieving a dual improvement in economy and comfort under the major trend of environmental protection and energy conservation, and has a profound impact on the entire new energy vehicle industry. In summary, the oil-gas separation structure provided by this invention opens up a new path for improving the performance of scroll compressors.

[0098] Through the oil-gas separation structure of this embodiment, the scroll compressor effectively reduces the oil content in the exhaust gas and improves oil return efficiency during operation. It also possesses excellent heat dissipation capabilities, ensuring system stability and cooling / heating performance, resulting in a significant performance improvement for electric vehicle air conditioning systems. This design aligns with the current needs of new energy vehicle development. In practical applications, by adjusting the aperture and number of oil passages in the spiral fins, and employing an oleophobic coating, optimal oil-gas separation can be achieved under different speed conditions, reducing power consumption and improving the driving range of new energy vehicles.

[0099] Furthermore, the use of 3D printing technology for integral molding not only reduces the number of parts and simplifies the assembly process, but also ensures structural consistency and sealing, further enhancing the overall performance of the system. In summary, the oil-gas separation structure of this embodiment and its application in a scroll compressor provide an efficient, energy-saving, and reliable solution for electric vehicle air conditioning systems, demonstrating the positive role of technological innovation in energy conservation, emission reduction, and improving quality of life. This innovative design not only helps improve the operating efficiency of the scroll compressor but also optimizes for the specific needs of new energy vehicle air conditioning systems, thus achieving significant results in reducing energy consumption, improving system energy efficiency, and ensuring the vehicle's driving range.

[0100] By incorporating a dual oil separator structure on the front cover and exhaust cover 8, along with paired oil passages on the spiral fins, the oil-gas separation effect is significantly improved. This effectively reduces exhaust temperature, ensuring stable compressor operation and enhancing overall system reliability. In practical applications, the flexibility and adaptability of this design are fully demonstrated. Adjustments can be made to different vehicle models and operating conditions through various arrangements of the oil separator pipes inside and outside the walls, as well as precise control of the oil passages, ensuring optimal system performance. The oil separator pipes are integrated with the front cover and exhaust cover 8 using 3D printing technology, further simplifying the manufacturing process, reducing production costs, and improving the overall structural strength and sealing performance. In summary, the oil-gas separation structure of this embodiment provides efficient, energy-saving, and stable operation for electric vehicle air conditioning systems. Through this innovative design, the scroll compressor effectively overcomes the limitations of traditional oil-gas separation structures, significantly improving its application in electric vehicle air conditioning systems and bringing substantial improvements to energy efficiency and user experience in the electric vehicle industry. This design not only achieves efficient separation of the oil-gas mixture but also reduces exhaust temperature through heat dissipation and optimizes the oil return path, thereby significantly improving the overall performance of the air conditioning system in new energy vehicles, reducing energy consumption, and extending system lifespan. This is of great significance for promoting technological progress and energy conservation and emission reduction goals in the new energy vehicle industry. Based on this innovative design, continuous optimization and improvement are expected to further enhance the operating efficiency and reliability of the scroll compressor.

[0101] By employing the oil-gas separation structure of this embodiment, the scroll compressor can effectively dissipate heat from the exhaust gas while reducing the oil content, thereby lowering the exhaust temperature and improving the system's operational stability and service life. The key to this design lies in the ingenious application of spiral fins, which not only increase the efficiency of oil-gas separation but also promote the rapid falling of oil droplets through the provided oil passages, ensuring timely recovery of lubricating oil and optimizing the oil return process.

[0102] In practical applications, the selection of the diameter of the first and second oil passages is... 1mm to Within a 5mm range, effective oil droplet separation is ensured while maintaining smooth gas flow, achieving a perfect balance between separation efficiency and system operation. Through the implementation of this embodiment, the power consumption of the scroll compressor is significantly reduced, and the cooling / heating effect is improved. This provides an efficient, energy-saving, and reliable oil-gas separation solution for electric vehicle air conditioning systems, helping to improve the vehicle's range and bringing users a more comfortable and economical driving experience.

[0103] Through the oil-gas separation structure design in this embodiment, the scroll compressor achieves efficient separation of the oil-gas mixture during operation. Simultaneously, the heat dissipation function of the spiral fins reduces the exhaust temperature, ensuring safe and stable system operation and extending equipment lifespan. The oil passage design on the spiral fins accelerates oil droplet return, improves lubricant utilization efficiency, reduces power consumption, and enhances the compressor's cooling / heating performance, playing a crucial role in improving the overall efficiency of new energy vehicle air conditioning systems. This design is not only suitable for standard installation orientations, but also maintains the stability and reliability of oil-gas separation even in application scenarios where the upper cover is rotated 90° to the left, demonstrating high adaptability and flexibility. In practical applications, by adjusting the diameter of the spiral fins and the number of oil passages, the oil-gas separation effect and system performance can be further optimized to meet the needs of different vehicle models and working environments, reflecting the design's forward-thinking and practicality.

[0104] The oil-gas separation structure in this embodiment provides a new approach for upgrading the performance of scroll compressors and optimizing air conditioning systems in new energy vehicles, demonstrating its enormous potential in energy conservation, emission reduction, and improved user experience. Through this oil-gas separation structure, the scroll compressor effectively separates the oil-gas mixture during operation, reducing the oil content in the exhaust gas, increasing cooling capacity, and reducing power consumption. The oil passages on the spiral fins not only ensure rapid return of accumulated oil droplets, accelerating the oil return process, but also reduce the exhaust temperature through heat dissipation, improving the system's operational reliability and service life. The key to this design is that it not only improves separation efficiency through two oil-gas separation processes but also utilizes the special structure of the spiral fins to effectively cool the exhaust gas, thereby significantly reducing the proportion of lubricating oil in the microchannel heat exchanger, improving the heat exchanger's heat exchange effect, and enhancing the energy efficiency of the air conditioning system.

[0105] According to another aspect of the present invention, a compressor is provided, comprising: a body, an end cover 7, and the oil-gas separation structure provided in the above embodiment. The end cover 7 is provided with an outlet hole 10; the oil-gas separation structure is mounted on the end cover 7. In this manner, the compressor can utilize the dual oil-pipe system of the oil-gas separation structure to achieve more efficient oil-gas separation and oil return, reduce the oil content in the exhaust gas, and improve the cooling or heating efficiency of the heat exchanger. This ensures the operational stability of the compressor and the vehicle's range without increasing additional power consumption. The arrangement of the first and second connecting chambers, in conjunction with the first oil-pipe 9 and the second oil-pipe 18, ensures that the oil content of the gas after two separations is extremely low, further optimizing the compressor's exhaust temperature. Through the heat dissipation effect of the spiral fins, the cooling effect of the gas is enhanced, effectively improving the overall performance and system life of the compressor. Therefore, a compressor with this oil-gas separation structure can significantly reduce the proportion of lubricating oil in the heat exchanger pipes, improve the flow state of the refrigerant, and achieve the goal of improving the energy efficiency of the air conditioning system and the overall vehicle energy efficiency.

[0106] Specifically, the compressor can be a scroll compressor. A front cover exhaust port 82 is provided on the front cover.

[0107] Specifically, the compressor in this embodiment also includes a housing 1, a motor assembly 3, a bracket 4, a moving scroll 5, a stationary scroll 6, an end cover 7 (which can also be called a front cover), and an exhaust cover 8. The front cover has an air inlet, a first sealing ring 19, and also a first oil separator pipe 9 and a second oil separator pipe 18. Refrigerant from the system evaporator enters the compressor through the compressor suction port 2, passes through the motor and bracket 4, and enters the compression chamber composed of the moving and stationary scrolls. Refrigerant discharged from the exhaust port enters the front cover. Refrigerant entering from the air inlet undergoes gas-liquid separation through the oil separator pipe. The first oil separator pipe 9 has an air outlet, an oil outlet, a first spiral fin 93, a closed end 94, and an outer circle of the first oil separator pipe 9 (corresponding to the outer circle of the first main body 95). The first spiral fin 93 has a first oil passage hole 931, and the second spiral fin 183 has a second oil passage hole 1831.

[0108] Specifically, the closed end 94 is welded to the first mounting part 75 to form a weld 24, so as to ensure the installation stability of the first oil distribution pipe 9.

[0109] like Figures 1 to 7As shown, the oil-gas mixture enters tangentially from the air inlet at a certain speed and spirals around the first spiral fin 93 of the first oil distribution pipe 9 in the front cover cavity. As the oil-gas mixture flows through the first spiral fin 93, its temperature decreases. Some of the oil droplets in the oil-gas mixture are thrown onto the wall of the oil storage cavity due to the spiral motion and flow to the bottom of the oil storage cavity. The other part adheres to the first spiral fin 93 as the oil-gas mixture flows through it. The oil droplets on it will gather and move downward along the first spiral fin 93, dripping from the oil passage to the bottom of the oil storage cavity.

[0110] like Figures 1 to 7 As shown, the oil-gas mixture after the first gas-liquid separation enters the exhaust cover inlet 81 from the front cover exhaust port 82, and undergoes a second gas-liquid separation through the second oil separator 18. Similarly, the separated lubricating oil flows along the wall and the second spiral fins 183 to the second oil storage chamber 22. The lubricating oil in the second oil storage chamber 22 flows to the oil storage chamber of the front cover through the one-way valve in the exhaust cover 8 return oil hole and the front cover return oil hole 731, where it merges with the lubricating oil from the first gas-liquid separation. After passing through the filter oil screen 13, it flows through the first return oil channel 14 and the second return oil channel 15 on the stationary vortex disk 6, and the wear-resistant plate return oil channel 161 on the wear-resistant plate 16 on the support 4, and then flows to the back pressure chamber 17 to lubricate and cool the moving parts. The refrigerant gas with low oil content after the second separation is discharged to the external heat exchanger through the second separation outlet 181 and the exhaust port 83, thus continuously circulating.

[0111] like Figures 1 to 7 The oil-gas separation structure in this embodiment includes a front cover and an exhaust cover 8. The front cover is provided with a first sealing groove 71, a second sealing groove 72, a front cover oil return hole 731, a front cover exhaust hole 82, and a first mounting part 75. The exhaust cover 8 is provided with an exhaust cover air inlet 81, an exhaust cover 8 oil return hole, an exhaust port 83, and a second mounting part 84. The first sealing ring 19 and the second sealing ring 20 are respectively installed in the first sealing groove 71 and the second sealing groove 72. The first sealing ring 19 and the second sealing ring 20 respectively seal the oil-gas mixture after the first gas-liquid separation flowing from the exhaust hole 82 of the front cover to the air inlet 81 of the exhaust cover and the lubricating oil flowing from the oil return hole of the exhaust cover 8 to the oil return hole 731 of the front cover from the outside. The front cover and the exhaust cover 8 are fixedly connected by fastening bolts 21. The first oil distribution pipe 9 and the secondary oil distribution pipe respectively have an outer circular portion of the first main body 95 (corresponding to the outer arc wall of the first main body 95) and an outer circular portion of the second main body 184 (corresponding to the outer arc wall of the second main body 184), which can be interference-fitted with the first mounting portion 75 and the second mounting portion 84 respectively. The outer circular portion of the second oil distribution pipe 18 of the secondary oil distribution pipe needs to be welded to the second mounting portion 84 to ensure further sealing.

[0112] Generally, to ensure better oil return, the oil passage holes on the first spiral fin 93 and the second spiral fin 183, and the oil passage holes on the second oil distribution pipe 18, appear in pairs, and their diameters are generally selected as... 1mm~ The first helical fin 93 and the second helical fin 183 are 5mm thick and can be coated with an oleophobic coating to prevent oil droplets from adhering.

[0113] When the oil-gas mixture enters the compressor, it first enters the motor and support 4 through the suction port 2 of the housing 1, and then enters the compression chamber composed of the moving plate and the stationary plate. The oil-gas mixture generated during the compression process is then discharged through the static scroll exhaust port 11 of the stationary plate to the air inlet of the front cover. At this time, the oil-gas mixture enters the first connecting chamber of the front cover with a tangential velocity, where the spiral fins of the first oil separator 9 cause the oil-gas mixture to move in a spiral motion, achieving preliminary oil-gas separation by using centrifugal force. The separated gas passes through the first separation outlet, while the oil droplets fall along the wall of the oil storage chamber to the first oil storage chamber 12. The gas continues to enter the second connecting chamber along the connecting channel 80 and enters the exhaust cover inlet 81 of the exhaust cover 8, and then flows through the second spiral separation channel of the second oil separator 18, which is surrounded by the second spiral fins 183, for a second oil-gas separation. The separated gas exits through the second separation outlet 181 and is discharged to the external heat exchanger through the exhaust port 83. The remaining oil droplets move downwards along the wall of the second oil storage chamber 22, flow back to the first oil storage chamber 12 through the exhaust cover 8 oil return hole and the front cover oil return hole 731 of the front cover. After being filtered by the oil filter screen 13, the lubricating oil passes through the first oil return channel 14 and the second oil return channel 15 on the stationary scroll plate 6, and then through the wear-resistant plate oil return channel 161 on the wear-resistant plate 16, finally returning to the back pressure chamber 17 to lubricate and cool the moving parts of the compressor. Throughout the process, the design of the oil passage holes on the spiral fins promotes the aggregation and falling of oil droplets, accelerates the oil return process, and ensures the effective recovery and reuse of lubricating oil, further reducing the oil content in the exhaust and optimizing the performance and operating efficiency of the compressor. By setting up this oil-gas separation structure, the compressor can effectively reduce the exhaust temperature during operation, improve the stability of system operation and extend the equipment life, while reducing power consumption and increasing the overall cooling or heating capacity. It can maintain a good oil-gas separation effect under different speed conditions.

[0114] In this embodiment, the oil-gas separation process of the compressor begins with the oil-gas mixture being discharged from the compression chamber through the static scroll exhaust port 11 of the static plate, entering the front cover, and then tangentially entering the spiral separation channel of the first oil separator 9. Under the action of the spiral fins of the first oil separator 9, the gas undergoes initial separation. Oil droplets fall into the first oil storage chamber 12 due to centrifugal force, while the gas enters the connecting channel 80 through the first separation outlet and flows to the second connecting chamber. Subsequently, the gas undergoes secondary separation in the second spiral separation channel of the second oil separator 18. The second spiral fins 183 further promote the separation of oil droplets from the gas flow, and they finally fall into the second oil storage chamber 22. The separated gas is discharged to the external heat exchanger through the second separation outlet 181 and the exhaust port 83. Lubricating oil flows back to the first oil storage chamber 12 through the oil return hole of the exhaust cover 8 and the oil return hole 731 of the front cover. It then passes through the oil filter 13, the first oil return channel 14, the second oil return channel 15, and the wear-resistant plate oil return channel 161, finally returning to the back pressure chamber 17 for lubrication and cooling of the compressor's moving parts. The oil passages and design on the spiral fins facilitate the rapid fall of oil droplets, preventing them from being re-entrained by the gas, thus effectively reducing the oil content in the compressor's exhaust. Throughout the process, the heat dissipation function of the spiral fins lowers the exhaust temperature, ensuring stable compressor operation and a high system energy efficiency ratio, playing a crucial role in improving the overall performance of the air conditioning system in new energy vehicles.

[0115] Specifically, when the oil-gas mixture enters through the spiral separation channel of the first oil separator 9, the gas moves in a spiral motion under the guidance of the first spiral fins 93, while the oil droplets are thrown into the first oil storage chamber 12 due to centrifugal force. After preliminary separation, the gas enters the connecting channel 80 through the first separation outlet, then enters the second connecting chamber, and enters the second spiral separation channel of the second oil separator 18 tangentially. Under the guidance of the second spiral fins 183, the gas continues to undergo secondary oil-gas separation in a spiral motion. The separated oil droplets slide down the wall of the second oil storage chamber 22, while the gas is discharged from the second separation outlet 181 and finally flows to the external heat exchanger through the exhaust port 83. During the oil return process, the lubricating oil first enters the first oil storage chamber 12 through the oil return hole of the exhaust cover 8, then through the oil return hole 731 of the front cover, then passes through the oil filter screen 13 to remove impurities, and then passes through the first oil return channel 14, the second oil return channel 15, and the wear-resistant plate oil return channel 161, finally returning to the back pressure chamber 17. The entire oil-gas separation and oil return process ensures efficient recovery and utilization of lubricating oil, improving the overall efficiency and reliability of the compressor while reducing power consumption and providing vehicles with longer driving range. The oil passage design on the spiral fins promotes the rapid descent of oil droplets, preventing them from being re-entrained in the airflow, thus reducing the possibility of oil being carried by the gas and ensuring a highly efficient oil-gas separation process. Furthermore, the heat dissipation effect of the spiral fins helps reduce gas temperature, optimizing the system's heat exchange performance and supporting the stable operation of the compressor.

[0116] In this embodiment, the compressor can be a scroll compressor, which is suitable for energy-saving air conditioners or dual-mode solar heat pump air conditioning units. Specifically, when the scroll compressor is working, the oil-gas mixture is discharged through the compression chamber and first enters the spiral separation channel of the first oil separator 9 tangentially into the front cover. Under the guidance of the first spiral fins 93, the gas undergoes spiral motion. Due to centrifugal force, oil droplets are thrown towards the first oil storage chamber 12. The separated gas enters the connecting channel 80 through the first separation outlet and flows to the second connecting chamber. In the second connecting chamber, the gas again enters the second spiral separation channel of the second oil separator 18 tangentially. The second spiral fins 183 continue to guide the gas to undergo spiral motion, realizing secondary oil-gas separation. The separated oil droplets slide down the wall of the second oil storage chamber 22, while the gas is discharged from the second separation outlet 181 and finally flows to the external heat exchanger through the exhaust port 83. During the oil return process, the lubricating oil enters the first oil storage chamber 12 through the oil return hole of the exhaust cover 8 and the oil return hole 731 of the front cover. After being filtered by the oil filter screen 13, it returns to the back pressure chamber 17 through the first oil return channel 14, the second oil return channel 15, and the wear-resistant plate oil return channel 161, providing lubrication and cooling for the moving parts of the compressor. The dual oil-pipe design of the oil-gas separation structure, combined with spiral fins and oil passages, significantly improves the efficiency of oil-gas separation, reduces the oil content in the exhaust, and reduces power consumption. The heat dissipation function of the spiral fins reduces the gas temperature, optimizes the heat exchange performance of the system, ensures the stable operation of the compressor, and improves the reliability of the system. In addition, the design of the oil passages promotes the rapid falling of oil droplets, preventing oil droplets from being re-entrained in the airflow, reducing the oil content in the exhaust, improving the recovery and utilization efficiency of lubricating oil, providing a more stable working environment for the compressor, and reducing the overall energy consumption of the system, thereby improving the driving range of new energy vehicles and the overall efficiency of the air conditioning system. The entire oil-gas separation and oil return process not only improves the compressor's operating efficiency and reliability but also helps reduce system energy consumption, achieving energy conservation and emission reduction, and promoting the green upgrade of air conditioning systems in new energy vehicles. In other embodiments, by adjusting the structure of the spiral fins, the number and location of the oil passages, and by using an oleophobic coating, the oil-gas separation effect and system performance can be further optimized to meet the needs under different operating conditions.

[0117] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: improved oil-gas separation effect, reduced oil discharge rate of the scroll compressor, increased cooling capacity and reduced power consumption. Reducing the compressor's oil discharge rate decreases the amount of lubricating oil in the pipes of the microchannel heat exchanger, improving the heat exchange effect of the heat exchanger, increasing the energy efficiency of the air conditioning system, thereby ensuring the vehicle's driving range. Lowering the compressor's exhaust temperature improves system operational reliability and system lifespan.

[0118] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0119] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0120] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0121] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0122] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0123] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil and gas separation structure, characterized by, The utility model relates to a compressor oil separation device, comprising: an exhaust cover (8) mounted on an end cover (7) of a compressor, the exhaust cover (8) having an exhaust cavity in communication with an exhaust hole (10) on the end cover (7), the exhaust cavity comprising a first communication cavity and a second communication cavity arranged separately along the arrangement direction of the exhaust cover (8) and the end cover (7), the first communication cavity being located on the side of the second communication cavity close to the exhaust hole (10), the exhaust cover (8) being provided with a communication channel (80) in communication with both the first communication cavity and the second communication cavity, and an exhaust port in communication with the second communication cavity; a first oil separation pipe (9) mounted in the first communication cavity and a second oil separation pipe (18) mounted in the second communication cavity, the first oil separation pipe (9) and the second oil separation pipe (18) being in communication with both ends of the communication channel (80) respectively; the second oil separation pipe (18) comprising a second main body (184) and a second spiral fin (183), the second spiral fin (183) being arranged on the outer peripheral wall of the second main body (184), the second spiral fin (183) extending along the extension direction of the second main body (184), the second spiral separation channel enclosed by the second spiral fin (183) being arranged opposite to the communication channel (80), and the second spiral separation channel being in communication with the exhaust port; the second main body (184) being a second pipe body, the second pipe body having a second channel (1841), a second oil outlet (182) and a second separated exhaust outlet (181) located at both ends of the second channel (1841) respectively, the second separated exhaust outlet (181) being located on the side of the second oil outlet (182) close to the exhaust port; the first oil separation pipe (9) comprising a first pipe body and a first spiral fin (93), the first pipe body having a first channel (951), a first oil outlet (92) and a first separated exhaust outlet (91), the first separated exhaust outlet (91) and the first oil outlet (92) being in communication with the first channel (951), the first separated exhaust outlet (91) being arranged on the side of the first channel (951) close to the communication channel (80), and the first spiral fin (93) being mounted in the first channel (951) and extending along the extension direction of the first channel (951), one end of the first spiral fin (93) being arranged opposite to the first oil outlet (92). The first pipe body comprises a first pipe section (952), a first transition pipe section (954) and a second pipe section (953) connected in sequence, an outer wall of the second pipe section (953) is sealingly connected with a wall surface surrounding the first communication cavity; the first spiral fin (93) is installed at a gap between an outer wall of the first pipe section (952) and the wall surface surrounding the first communication cavity, or the first spiral fin (93) is installed in at least part of the first pipe section (952) and the second pipe section (953); wherein, one end of the first pipe section (952) away from the second pipe section (953) forms the first oil outlet (92); the first separated gas outlet (91) is arranged at the first transition pipe section (954); the first separated gas outlet (91) is arranged in a spaced manner with the first spiral fin (93), the first spiral fin (93) surrounds a first spiral separation channel, and the oil-gas separation structure further comprises a partition piece arranged between the first spiral fin (93) and the first separated gas outlet (91) to separate the first spiral separation channel from the first separated gas outlet (91).

2. The oil and gas separation structure according to claim 1, characterized by, At least one of the first oil separation pipe (9) and the second oil separation pipe (18) comprises a spiral fin; The spiral fin extends along the extension direction of the first oil separation pipe (9) and / or the second oil separation pipe (18) and surrounds a spiral separation channel; and / or, An oil-repellent coating is arranged on the spiral fin.

3. The oil and gas separation structure of claim 1, wherein, The first oil separation pipe (9) comprises: a first main body portion (95); a first spiral fin (93) arranged on an outer peripheral wall of the first main body portion (95), the first spiral fin (93) extending along the extension direction of the first main body portion (95), the first spiral separation channel being arranged in a spaced manner with the gas outlet hole (10), and one end of the communication channel (80) being arranged in a spaced manner with the first spiral separation channel.

4. The oil and gas separation structure according to claim 3, characterized by, The first spiral fin (93) has a first end and a second end arranged in a spaced manner along the extension direction of the first main body portion (95), the first end being arranged in a spaced manner with the gas outlet hole (10); the first main body portion (95) is a first pipe body, the first pipe body has a first channel (951) in communication with the first communication cavity, one end of the first channel (951) close to the first end is provided with a first oil outlet (92), the first pipe body is further provided with a first separated gas outlet (91) in communication with the first channel (951), the first separated gas outlet (91) is arranged on a side of the first channel (951) close to the communication channel (80), and the first separated gas outlet (91) is in communication with a gap between an outer wall of the first pipe body and the wall surface surrounding the first communication cavity.

5. The oil-gas separation structure according to claim 4, wherein a first oil passage hole (931) penetrating through the first spiral fin (93) is arranged on a side of the first spiral fin (93) close to the first end.

6. The oil-gas separation structure according to claim 1, characterized in that, wherein an outer diameter of the first pipe section (952) is smaller than an outer diameter of the second pipe section (953); along an extension direction of the first pipe section (952) to the second pipe section (953), the outer diameter of the first transition pipe section (954) gradually increases; and / or, an inner diameter of the first pipe section (952) is smaller than an inner diameter of the second pipe section (953); along an extension direction of the first pipe section (952) to the second pipe section (953), the inner diameter of the first transition pipe section (954) gradually increases.

7. The oil and gas separation structure of claim 1, wherein, the second pipe body comprises a third pipe section (1842) and a fourth pipe section (1843) connected to each other, the fourth pipe section (1843) is sealingly connected with a wall surface surrounding the second communication cavity, an outer wall of the third pipe section (1842) is arranged in a spaced manner with the wall surface surrounding the second communication cavity, the second spiral fin (183) is arranged on the outer wall of the third pipe section (1842), and a side of the second spiral fin (183) close to the second oil outlet (182) is provided with a second oil passing hole (1831) penetrating through the second spiral fin (183).

8. The oil and gas separation structure of claim 7, wherein, the second pipe body further comprises a second transition pipe section (1844) arranged between the third pipe section (1842) and the fourth pipe section (1843); wherein, an outer diameter of the third pipe section (1842) is smaller than an outer diameter of the fourth pipe section (1843); along an extension direction of the third pipe section (1842) to the fourth pipe section (1843), the outer diameter of the second transition pipe section (1844) gradually increases; and / or, an inner diameter of the third pipe section (1842) is smaller than an inner diameter of the fourth pipe section (1843); along an extension direction of the third pipe section (1842) to the fourth pipe section (1843), the inner diameter of the second transition pipe section (1844) gradually increases.

9. The oil and gas separation structure of claim 1, wherein, the oil return communication port is in communication with the first communication cavity and the second communication cavity at two ends thereof respectively, and the oil return hole is in communication with the second communication cavity and an oil return passage on the compressor at two ends thereof respectively.

10. The oil and gas separation structure of claim 9, wherein, the oil-gas separation structure further comprises: a switch valve arranged at the oil return communication port to open or close the oil return communication port.

11. The oil and gas separation structure of claim 1, wherein, the exhaust cover (8) comprises: a first mounting portion on which the first communication cavity is arranged; a second mounting portion on which the second communication cavity is arranged; wherein, the first mounting portion and the second mounting portion are detachably connected, the first mounting portion is mounted on an end cover (7) of the compressor, and the second mounting portion is located on a side of the first mounting portion away from the end cover (7).

12. A compressor characterized by, comprise: a body portion and an end cover (7) on which an air outlet hole (10) is arranged; the oil-gas separation structure according to any one of claims 1 to 11, which is mounted on the end cover (7).

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