Oil-gas separator and compressor with same

Abstract

The invention provides an oil-gas separator and a compressor with the oil-gas separator, and the oil-gas separator comprises a cover body which covers a gas outlet of a compression main body, the cover body is provided with an oil storage cavity and an exhaust port, and the exhaust port is communicated with the gas outlet through the oil storage cavity; the air outlet is covered with the separation structure, the separation structure is provided with a center cavity communicating with the air outlet, the separation structure comprises a plurality of separation pieces arranged around the outer edge of the center cavity at intervals, and an arc-shaped separation channel is defined between at least two adjacent separation pieces; the separation channel is provided with a separation inlet communicated with the central cavity and a separation outlet communicated with the oil storage cavity; wherein the cavity wall, opposite to the air outlet, of the center cavity is arranged in an arc shape, and an arc-shaped protrusion of the cavity wall of the center cavity faces the air outlet and is used for receiving airflow and guiding the airflow to enter the separation inlet. The scroll compressor solves the problem that in the prior art, the oil discharge rate is too large in the exhaust process of a scroll compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an oil-gas separator and a compressor with the same. BACKGROUND

[0002] At present, scroll compressors are widely used in household and commercial refrigeration systems due to their high efficiency, reliability and compact design. The working principle of scroll compressors is based on the relative movement of the dynamic scroll plate and the static scroll plate. The static scroll plate is stationary, and the dynamic scroll plate rotates. The dynamic scroll plate and the static scroll plate mesh to form a compression chamber. As the dynamic scroll plate rotates, the compression chamber gradually decreases and compresses the gas in the compression chamber. The compressed gas is finally discharged through the exhaust port to drive the operation of the refrigeration system.

[0003] However, high-pressure gas compressed by the scroll compressor is prone to mixing with refrigeration oil. The refrigeration oil enters the high-pressure buffer zone through the exhaust port of the static scroll plate and is discharged from the compressor along with the gas during the scroll compressor exhaust process. Excessive oil discharge rate reduces the refrigeration oil in the scroll compressor, thereby reducing the operation reliability of the scroll compressor. SUMMARY

[0004] The main purpose of the present application is to provide an oil-gas separator and a compressor with the same to solve the problem of excessive oil discharge rate during the exhaust process of the scroll compressor in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an oil-gas separator is provided, comprising: a cover body arranged at an exhaust port of a compression main body, the cover body having a storage cavity and an exhaust port, the exhaust port being in communication with the exhaust port through the storage cavity; a separation structure arranged at the exhaust port, the separation structure having a central cavity in communication with the exhaust port, the separation structure comprising a plurality of separation pieces arranged at intervals around the outer edge of the central cavity, at least two adjacent separation pieces forming an arc-shaped separation channel therebetween, the separation channel having a separation inlet in communication with the central cavity and a separation outlet in communication with the storage cavity; wherein the cavity wall of the central cavity opposite to the exhaust port is arranged in an arc shape, the arc-shaped protrusion of the cavity wall of the central cavity is arranged towards the exhaust port, and the arc-shaped protrusion is used for receiving airflow and guiding the airflow into the separation inlet.

[0006] Further, the separation channel comprises a first channel and a second channel in communication with each other, the first channel forms the separation inlet at one end away from the second channel, and the second channel forms the separation outlet at one end away from the first channel; wherein the flow cross-sectional area of the first channel is greater than that of the second channel.

[0007] Furthermore, the oil-gas separator also includes: an oil-blocking structure disposed on the cavity wall of the oil storage chamber, the oil-blocking structure being arranged around the periphery of the separation structure, and at least a portion of the oil-blocking structure being disposed opposite to the separation outlet; wherein, the oil-blocking structure is arc-shaped and extends circumferentially along the cavity wall of the oil storage chamber.

[0008] Furthermore, there are multiple oil-blocking structures, which are arranged at intervals around the periphery of the separation structure to form a spiral structure.

[0009] Furthermore, the separation structure also includes a support portion and a connecting portion, the connecting portion being arranged around the support portion and connected to multiple separation components away from the periphery of the support portion; wherein, at least a portion of the support portion protrudes toward the air outlet to form the cavity wall of the central cavity.

[0010] Furthermore, the connecting part has a bearing surface, and the oil-gas separator also includes: an abutting structure, one end of which is connected to the cover, and the other end of which abuts against the bearing surface, so as to abut the separation structure at the gas outlet.

[0011] Furthermore, the abutment structure includes multiple abutment members, one end of which is arranged at intervals around the vent, and the other end of which is arranged at intervals along the circumference of the bearing surface.

[0012] Furthermore, the oil-gas separator also includes multiple sealing structures, each corresponding to a separate component, to seal the gap between the compression body and the separate component.

[0013] Furthermore, the oil-gas separator also includes a noise-reducing structure, which is installed on the cavity wall of the separation structure. At least part of the noise-reducing structure is made of noise-reducing material to reduce the noise of the separation structure.

[0014] According to another aspect of the present invention, a compressor is provided, which includes the oil-gas separator described above.

[0015] Applying the technical solution of this invention, the cover of the oil-gas separator is installed at the outlet of the compression body. The cover has an oil storage chamber and an exhaust port, with the exhaust port communicating with the outlet through the oil storage chamber. A separation structure is installed at the outlet, having a central cavity communicating with the outlet. The separation structure includes multiple separation elements spaced apart around the outer edge of the central cavity. At least two adjacent separation elements form an arc-shaped separation channel, which has a separation inlet communicating with the central cavity and a separation outlet communicating with the oil storage chamber. The central cavity wall, opposite the outlet, is arc-shaped, with an arc-shaped protrusion facing the outlet. This protrusion receives and guides the airflow into the separation inlet. In this way, when the high-pressure airflow containing refrigeration oil is discharged from the exhaust port, the high-pressure airflow containing refrigeration oil first enters the central cavity and then enters the arc-shaped separation channel through the separation inlet. This efficiently converts the linear motion of the high-pressure airflow containing refrigeration oil into rotational motion. During the flow of the high-pressure airflow containing refrigeration oil in the arc-shaped separation channel, centrifugal force is generated. Under the action of strong centrifugal force, the denser refrigeration oil is thrown towards the side edge of the arc-shaped separation channel and accumulates, thus achieving the separation of the high-pressure airflow containing refrigeration oil. After oil-gas separation, the high-pressure airflow and the accumulated refrigeration oil enter the oil storage chamber through the separation outlet. Since the refrigeration oil has already accumulated, it is thrown against the chamber wall after entering the oil storage chamber. The airflow passes through the oil storage chamber and is discharged from the exhaust port, thereby achieving oil-gas separation of the high-pressure airflow containing refrigeration oil, reducing the oil content in the exhaust of the scroll compressor, and thus solving the problem of excessive oil discharge rate in the exhaust process of the scroll compressor in the prior art. Meanwhile, the central cavity wall is arc-shaped, allowing the high-pressure airflow containing refrigerant oil ejected from the inlet to contact the arc-shaped cavity wall as it enters the central cavity and proceeds along the arc surface into the separation inlet. On one hand, compared to a flat cavity wall, the arc-shaped cavity wall significantly reduces boundary layer separation, lowers the turbulence intensity of the high-pressure airflow containing refrigerant oil, and thus reduces collision losses, ensuring the operating power of the high-pressure airflow containing refrigerant oil and guaranteeing the separation reliability of the oil-gas separator. On the other hand, the arc-shaped cavity wall helps guide the high-pressure airflow containing refrigerant oil to flow smoothly along the arc-shaped cavity wall, resulting in a more uniform bubble distribution and fewer bursts, thereby reducing noise during the oil-gas separation process. Attached Figure Description

[0016] 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: Figure 1 A cross-sectional schematic diagram of an embodiment of an oil-gas separator according to the present invention is shown; Figure 2 It shows Figure 1Exploded view of part of the structure of the oil-gas separator in the image; Figure 3 It shows Figure 1 A three-dimensional view of the separation structure of the oil-gas separator in the image. Figure 4 It shows Figure 3 Top view of the separated structure in the middle; Figure 5 It shows Figure 3 A three-dimensional view of the separated structure from another perspective; Figure 6 It shows Figure 3 A bottom view of the separated structure in the middle; Figure 7 It shows Figure 3 A cross-sectional view of the separated structure in the middle; Figure 8 It shows Figure 1 A cross-sectional view of the cover of the oil-gas separator.

[0017] The above figures include the following reference numerals: 1. Compression unit; 101. Air outlet; 10. Cover; 11. Oil reservoir; 12. Exhaust port; 20. Separation structure; 21. Central cavity; 22. Separation component; 23. Separation channel; 231. Separation inlet; 232. Separation outlet; 233. First channel; 234. Second channel; 24. Supporting part; 25. Connecting part; 251. Supporting surface; 30. Oil baffle structure; 40. Abutment structure; 41. Abutment component; 50. Sealed structure. Detailed Implementation

[0018] 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.

[0019] To address the problem of excessive oil discharge rate during the exhaust process of scroll compressors in the prior art, this application provides an oil-gas separator and a compressor having the same.

[0020] like Figures 1 to 8As shown, the oil-gas separator includes a cover 10 and a separation structure 20. The cover 10 covers the outlet 101 of the compression body 1. The cover 10 has an oil storage chamber 11 and an exhaust port 12. The exhaust port 12 communicates with the outlet 101 through the oil storage chamber 11. The separation structure 20 covers the outlet 101. The separation structure 20 has a central cavity 21 communicating with the outlet 101. The separation structure 20 includes a plurality of separation elements 22 spaced around the outer edge of the central cavity 21. At least two adjacent separation elements 22 form an arc-shaped separation channel 23. The separation channel 23 has a separation inlet 231 communicating with the central cavity 21 and a separation outlet 232 communicating with the oil storage chamber 11. The central cavity 21 has an arc-shaped cavity wall opposite to the outlet 101. The arc-shaped protrusion of the cavity wall of the central cavity 21 faces the outlet 101 and is used to receive the airflow and guide the airflow into the separation inlet 231.

[0021] Applying the technical solution of this embodiment, the cover 10 of the oil-gas separator is placed over the air outlet 101 of the compression body 1. The cover 10 has an oil storage chamber 11 and an exhaust port 12, and the exhaust port 12 is connected to the air outlet 101 through the oil storage chamber 11. The separation structure 20 is placed over the air outlet 101. The separation structure 20 has a central cavity 21 that communicates with the air outlet 101. The separation structure 20 includes a plurality of separation members 22 spaced apart around the outer edge of the central cavity 21. At least two adjacent separation members 22 form an arc-shaped separation channel 23. The separation channel 23 has a separation inlet 231 that communicates with the central cavity 21 and a separation outlet 232 that communicates with the oil storage chamber 11. The cavity wall of the central cavity 21, which is opposite to the air outlet 101, is arc-shaped. The arc-shaped protrusion of the cavity wall of the central cavity 21 faces the air outlet 101. The arc-shaped protrusion is used to receive the airflow and guide the airflow into the separation inlet 231. In this way, when the high-pressure airflow containing refrigeration oil is discharged from the exhaust port 12, the high-pressure airflow containing refrigeration oil first enters the central cavity 21, and then enters the arc-shaped separation channel 23 through the separation inlet 231 from the central cavity 21. This efficiently converts the linear motion of the high-pressure airflow containing refrigeration oil into rotational motion. During the flow of the high-pressure airflow containing refrigeration oil in the arc-shaped separation channel 23, centrifugal force is generated. Under the action of the strong centrifugal force, the denser refrigeration oil is thrown towards the side edge of the arc-shaped separation channel 23 and accumulates, thus achieving the separation of the high-pressure airflow containing refrigeration oil. After oil-gas separation, the high-pressure airflow and the accumulated refrigeration oil enter the oil storage chamber 11 through the separation outlet 232. Since the refrigeration oil has been accumulated, it is thrown to the cavity wall after entering the oil storage chamber 11. The airflow passes through the oil storage chamber 11 and is discharged from the exhaust port 12, thereby achieving oil-gas separation of the high-pressure airflow containing refrigeration oil, reducing the oil content in the exhaust of the scroll compressor, and thus solving the problem of excessive oil discharge rate in the exhaust process of the scroll compressor in the prior art. Meanwhile, the cavity wall of the central cavity 21 is arc-shaped, which allows the high-pressure airflow containing refrigeration oil ejected from the air inlet to contact the arc-shaped cavity wall when it enters the central cavity 21, and enter the separation inlet 231 along the arc surface. On the one hand, compared with the flat cavity wall, the arc-shaped cavity wall can significantly reduce boundary layer separation, reduce the turbulence intensity of the high-pressure airflow containing refrigeration oil, and thus reduce the collision loss of the high-pressure airflow containing refrigeration oil, ensuring the running power of the high-pressure airflow containing refrigeration oil and ensuring the separation reliability of the oil-gas separator. On the other hand, the arc-shaped cavity wall helps to guide the high-pressure airflow containing refrigeration oil to flow smoothly along the arc-shaped cavity wall, and the bubble distribution of the high-pressure airflow containing refrigeration oil is more uniform, the number of bursts is reduced, and thus the noise of the oil-gas separator during the oil-gas separation process is reduced.

[0022] In this embodiment, the cover 10 is spherical, and the exhaust port 12 is cylindrical, with the central axis of the exhaust port 12 coinciding with the axis of symmetry of the cover 10. This spherical design of the cover 10 reduces fluid resistance and ensures smooth airflow as the airflow passes through the spherical oil reservoir 11.

[0023] In this embodiment, a sealing ring is also provided between the compression body 1 and the cover 10 to seal the gap between the compression body 1 and the cover 10, thereby ensuring the stability and sealing of the cover 10.

[0024] Specifically, the cover 10 is fixedly connected to the compression body 1 by screws, and the separation structure 20 is fixed to the air outlet 101 of the compression body 1 by steel pins, ensuring the stability of the installation of the separation structure 20 and the cover 10.

[0025] like Figure 5 and Figure 6 As shown, there are multiple separation channels 23, which are spaced apart around the outer edge of the central cavity 21, forming a vortex-like structure. This uniform arrangement of the separation channels 23 around the outer edge of the central cavity 21 creates a symmetrical and continuous vortex-like flow channel. This allows the high-pressure airflow containing refrigerant oil to be evenly distributed into each separation channel 23, forming a uniform and stable overall rotating flow field. This ensures consistent oil-gas separation in any direction, allowing the refrigerant oil to be continuously and evenly thrown towards the side edges of the separation channels 23, further improving the separation efficiency and reliability. It also allows the scroll compressor to perform oil-gas separation in any orientation, unaffected by its own posture, and is suitable for low-pressure environments, ensuring the stability of the scroll compressor's performance under different operating conditions. Furthermore, even under low-flow conditions, the multiple separation channels 23 can store a certain amount of refrigerant oil, ensuring the separation reliability of the oil-gas separator.

[0026] In this embodiment, four separation channels 23 are provided.

[0027] It should be noted that the number of separate channels 23 can be one, two, five, six, or more.

[0028] like Figures 5 to 7As shown, the separation channel 23 includes a first channel 233 and a second channel 234 that are interconnected. The end of the first channel 233 away from the second channel 234 forms a separation inlet 231, and the end of the second channel 234 away from the first channel 233 forms a separation outlet 232. The cross-sectional area of ​​the first channel 233 is larger than that of the second channel 234. This allows the high-pressure gas flow containing refrigeration oil to temporarily decrease in velocity when it enters the first channel 233, which has a larger cross-sectional area, providing more space and time for the initial aggregation and collision of the refrigeration oil, thus completing the separation of the refrigeration oil from the gas flow. Subsequently, the high-pressure gas flow continues into the second channel 234, which has a smaller cross-sectional area, where the velocity increases. This allows the gas flow after oil-gas separation to exit the separation outlet 232 more quickly. At this point, the refrigeration oil, having accumulated on the side edge of the separation channel 23, is mostly in an aggregated state and will not be carried away by the gas flow in large quantities, further ensuring the reliability of the oil-gas separation. Meanwhile, the first channel 233, with its large cross-sectional area, effectively reduces the pulsation and noise of the high-pressure airflow containing refrigeration oil. It can buffer and stabilize the high-pressure airflow containing refrigeration oil, effectively reduce turbulence, reduce airflow pulsation, absorb noise, and further reduce the noise of the oil-gas separator during the oil-gas separation process.

[0029] like Figure 7 As shown, the arrows indicate the flow direction of the high-pressure airflow containing refrigeration oil within the central cavity 21 and the separation channel 23. Along the direction from the outlet 101 into the central cavity 21, the cross-sectional height of the first channel 233 is greater than that of the second channel 234. Simultaneously, along the direction perpendicular to the outlet 101 into the central cavity 21, the cross-sectional width of the first channel 233 is greater than that of the second channel 234, resulting in a larger cross-sectional area for the flow of the first channel 233 compared to the second channel 234.

[0030] like Figure 2 and Figure 8As shown, the oil-gas separator also includes an oil-blocking structure 30. The oil-blocking structure 30 is disposed on the wall of the oil storage chamber 11, surrounding the periphery of the separation structure 20, with at least a portion of the oil-blocking structure 30 positioned opposite the separation outlet 232. The oil-blocking structure 30 is arc-shaped and extends circumferentially along the wall of the oil storage chamber 11. Thus, the arc-shaped oil-blocking structure 30 disposed at the separation outlet 232 can directly intercept the accumulated refrigerant oil ejected from the separation outlet 232, preventing the refrigerant oil from remixing with the airflow due to inertial splashing. This further avoids the possibility of accumulated refrigerant oil rising with the airflow to the exhaust port 12, further reducing the oil discharge rate during the scroll compressor's exhaust process. Meanwhile, the arc-shaped oil-blocking structure 30 not only guides the airflow discharged from the separation outlet 232, ensuring smooth airflow discharge, but also guides the refrigeration oil, causing the refrigeration oil to gather along the extension direction of the oil-blocking structure 30 and merge with the refrigeration oil thrown from the separation outlet 232 onto the cavity wall and stored in the oil storage cavity 11. This provides a clear and controllable flow path for the intercepted refrigeration oil to be guided to the oil storage cavity 11, ensuring the separation effect of the oil-gas separator and significantly reducing the oil content in the exhaust gas.

[0031] like Figure 2 and Figure 8 As shown, there are multiple oil-blocking structures 30, which are arranged at intervals around the periphery of the separation structure 20 to form a spiral structure. This spiral structure formed by multiple arc-shaped oil-blocking structures 30 constitutes a static spiral flow guide structure, which guides the airflow and refrigerant oil discharged from the multiple separation outlets 232. Combined with the spherical oil storage chamber 11, it provides continuous guidance to the refrigerant oil in the return direction, improving the reliability of refrigerant oil storage. Simultaneously, the spiral structure ensures that the refrigerant oil is effectively guided throughout the entire return path, avoiding accumulation or stagnation in local areas. This achieves more efficient collection and return of refrigerant oil, allowing for better maintenance of return oil stability even when the scroll compressor's posture changes.

[0032] like Figure 3 and Figure 4As shown, the separation structure 20 also includes a support portion 24 and a connecting portion 25. The connecting portion 25 is arranged around the support portion 24, and its periphery away from the support portion 24 is connected to multiple separating elements 22. At least a portion of the support portion 24 protrudes towards the outlet 101 to form the cavity wall of the central cavity 21. Thus, the separation structure 20, through the support portion 24 protruding towards the outlet 101, directly forms the arc-shaped guide cavity wall of the central cavity 21, ensuring that the cavity wall can smoothly and with low impact receive the high-pressure airflow containing refrigerant oil from the outlet 101 and smoothly guide it to the surrounding separation inlets 231. Simultaneously, the separation structure 20 connects the multiple separating elements 22 to the support portion 24 through the connecting portion 25, making the support portion 24 and the multiple separating elements 22 form a whole, creating a stable frame structure. This ensures that the high-pressure airflow containing refrigerant oil can always flow and undergo centrifugal separation along the preset separation channel 23, guaranteeing the durable and efficient operation of the oil-gas separator.

[0033] like Figure 1 ,like Figure 3 and Figure 4 As shown, the connecting part 25 has a bearing surface 251, and the oil-gas separator also includes an abutment structure 40. One end of the abutment structure 40 is connected to the cover 10, and the other end of the abutment structure 40 abuts against the bearing surface 251 to abut the separation structure 20 at the outlet 101. In this way, during the process of the cover 10 covering the compression body 1, the abutment structure 40 abuts against the separation structure 20 and firmly presses the separation structure 20 at the outlet 101, ensuring the communication between the central cavity 21 and the outlet 101, ensuring the connection stability between the separation structure 20 and the compression body 1, and ensuring the structural stability of the separation channel 23, thereby ensuring the stability and consistency of the separation effect of the oil-gas separator. At the same time, the separation structure 20 is firmly abutted against the outlet 101, reducing the vibration risk of the separation structure 20 under the influence of external forces, avoiding additional noise caused by the vibration of the separation structure 20, and improving the quietness of the scroll compressor operation.

[0034] like Figure 1 , Figure 2 and Figure 8As shown, the abutment structure 40 includes multiple abutment members 41. One end of each abutment member 41 is arranged at intervals around the exhaust port 12, and the other end is arranged at intervals along the circumference of the bearing surface 251. This arrangement of multiple abutment members 41 around the exhaust port 12 and at intervals along the circumference of the bearing surface 251 applies a uniform and symmetrical clamping force to the bearing surface 251 of the connecting portion 25, avoiding deformation or poor sealing of the separation structure 20 that may be caused by single-point or asymmetrical clamping, thus ensuring the long-term stability and reliable sealing of the separation structure 20 during operation. Simultaneously, this arrangement ensures that the separation structure 20 bears a uniform clamping force, guaranteeing its structural stability and helping to maintain the uniformity and stability of the rotating flow field, indirectly supporting high oil-gas separation efficiency.

[0035] like Figure 2 As shown, the oil-gas separator also includes multiple sealing structures 50. Each sealing structure 50 corresponds to one of the multiple separating elements 22 to seal the gap between the compression body 1 and the separating elements 22. In this way, the sealing structures 50 effectively seal the assembly gap between the separating elements 22 and the compression body 1, effectively preventing unseparated high-pressure gas flow containing refrigerant oil from directly entering the oil storage chamber 11 through this gap. This ensures that all high-pressure gas flow containing refrigerant oil enters the oil storage chamber 11 after oil-gas separation through the separation channel 23, thus improving the separation degree of the oil-gas separator.

[0036] In this embodiment, the oil-gas separator also includes a noise-absorbing structure. The noise-absorbing structure is disposed on the cavity wall of the separation structure 20, and at least a portion of the noise-absorbing structure is made of noise-absorbing material to reduce the noise of the separation structure 20. Thus, by providing a layer of noise-absorbing material on the cavity wall of the separation structure 20, the high-pressure airflow pulsation and noise containing refrigeration oil can be effectively absorbed and dissipated. Combined with the arc-shaped design of the central cavity 21 wall of the separation structure 20 and the flow cross-sectional area of ​​the first channel 233, this effectively reduces the airflow noise of the oil-gas separator during the oil-gas separation process, further improving the quietness of the scroll compressor operation.

[0037] According to another aspect of the present invention, a compressor is provided, which includes the oil-gas separator described above.

[0038] In this embodiment, the compressor is a scroll compressor. The scroll compressor includes a compression body 1 and a front cover. The front cover covers the compression body 1 and forms a cover 10. The compression body 1 has a compression chamber, which is formed by the meshing of a stationary scroll and a moving scroll. The stationary scroll has an outlet 101, which communicates with the compression chamber to discharge the compressed high-pressure airflow containing refrigerant oil into the central cavity 21.

[0039] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: The cover of the oil-gas separator is installed at the outlet of the compression body. The cover has an oil storage chamber and an exhaust port, with the exhaust port communicating with the outlet through the oil storage chamber. A separation structure is installed at the outlet. The separation structure has a central cavity communicating with the outlet and includes multiple separation elements spaced apart around the outer edge of the central cavity. At least two adjacent separation elements form an arc-shaped separation channel. The separation channel has a separation inlet communicating with the central cavity and a separation outlet communicating with the oil storage chamber. The cavity wall of the central cavity, opposite the outlet, is arc-shaped, with an arc-shaped protrusion on the cavity wall facing the outlet. This arc-shaped protrusion receives and guides the airflow into the separation inlet. In this way, when the high-pressure airflow containing refrigeration oil is discharged from the exhaust port, the high-pressure airflow containing refrigeration oil first enters the central cavity and then enters the arc-shaped separation channel through the separation inlet. This efficiently converts the linear motion of the high-pressure airflow containing refrigeration oil into rotational motion. During the flow of the high-pressure airflow containing refrigeration oil in the arc-shaped separation channel, centrifugal force is generated. Under the action of strong centrifugal force, the denser refrigeration oil is thrown towards the side edge of the arc-shaped separation channel and accumulates, thus achieving the separation of the high-pressure airflow containing refrigeration oil. After oil-gas separation, the high-pressure airflow and the accumulated refrigeration oil enter the oil storage chamber through the separation outlet. Since the refrigeration oil has already accumulated, it is thrown against the chamber wall after entering the oil storage chamber. The airflow passes through the oil storage chamber and is discharged from the exhaust port, thereby achieving oil-gas separation of the high-pressure airflow containing refrigeration oil, reducing the oil content in the exhaust of the scroll compressor, and thus solving the problem of excessive oil discharge rate in the exhaust process of the scroll compressor in the prior art. Meanwhile, the central cavity wall is arc-shaped, allowing the high-pressure airflow containing refrigerant oil ejected from the inlet to contact the arc-shaped cavity wall as it enters the central cavity and proceeds along the arc surface into the separation inlet. On one hand, compared to a flat cavity wall, the arc-shaped cavity wall significantly reduces boundary layer separation, lowers the turbulence intensity of the high-pressure airflow containing refrigerant oil, and thus reduces collision losses, ensuring the operating power of the high-pressure airflow containing refrigerant oil and guaranteeing the separation reliability of the oil-gas separator. On the other hand, the arc-shaped cavity wall helps guide the high-pressure airflow containing refrigerant oil to flow smoothly along the arc-shaped cavity wall, resulting in a more uniform bubble distribution and fewer bursts, thereby reducing noise during the oil-gas separation process.

[0040] 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-gas separator, characterized in that, include: A cover (10) is provided on the air outlet (101) of the compression body (1). The cover (10) has an oil storage chamber (11) and an exhaust port (12). The exhaust port (12) is connected to the air outlet (101) through the oil storage chamber (11). A separation structure (20) is provided over the air outlet (101). The separation structure (20) has a central cavity (21) communicating with the air outlet (101). The separation structure (20) includes a plurality of separation members (22) spaced apart around the outer edge of the central cavity (21). At least two adjacent separation members (22) form an arc-shaped separation channel (23). The separation channel (23) has a separation inlet (231) communicating with the central cavity (21) and a separation outlet (232) communicating with the oil storage cavity (11). The central cavity (21) and the air outlet (101) are respectively arranged with the cavity wall in an arc shape. The arc protrusion of the cavity wall of the central cavity (21) is arranged towards the air outlet (101). The arc protrusion is used to receive the airflow and guide the airflow into the separation inlet (231).

2. The oil-gas separator according to claim 1, characterized in that, The separation channel (23) includes a first channel (233) and a second channel (234) that are interconnected. The end of the first channel (233) away from the second channel (234) forms the separation inlet (231), and the end of the second channel (234) away from the first channel (233) forms the separation outlet (232). The cross-sectional area of ​​the first channel (233) is greater than that of the second channel (234).

3. The oil-gas separator according to claim 1, characterized in that, The oil-gas separator also includes: An oil-blocking structure (30) is provided on the cavity wall of the oil storage chamber (11). The oil-blocking structure (30) is arranged around the periphery of the separation structure (20), and at least a portion of the oil-blocking structure (30) is arranged opposite to the separation outlet (232). The oil-blocking structure (30) is arc-shaped and extends circumferentially along the wall of the oil storage cavity (11).

4. The oil-gas separator according to claim 3, characterized in that, There are multiple oil-blocking structures (30), and the multiple oil-blocking structures (30) are arranged at intervals around the periphery of the separation structure (20) so that the multiple oil-blocking structures (30) form a spiral structure.

5. The oil-gas separator according to claim 1, characterized in that, The separation structure (20) further includes a support portion (24) and a connecting portion (25), the connecting portion (25) being arranged around the support portion (24), and the connecting portion (25) being connected to a plurality of separation members (22) away from the periphery of the support portion (24); At least a portion of the bearing portion (24) protrudes toward the air outlet (101) to form the cavity wall of the central cavity (21).

6. The oil-gas separator according to claim 5, characterized in that, The connecting part (25) has a bearing surface (251), and the oil-gas separator further includes: A contact structure (40) is provided, one end of which is connected to the cover (10) and the other end of which is connected to the bearing surface (251) to abut the separation structure (20) at the air outlet (101).

7. The oil-gas separator according to claim 6, characterized in that, The abutting structure (40) includes a plurality of abutting members (41), one end of which is arranged at intervals around the exhaust port (12), and the other end of which is arranged at intervals along the circumferential direction of the bearing surface (251).

8. The oil-gas separator according to claim 1, characterized in that, The oil-gas separator also includes: Multiple sealing structures (50) are provided one-to-one with multiple separation elements (22) to seal the gap between the compression body (1) and the separation element (22).

9. The oil-gas separator according to claim 1, characterized in that, The oil-gas separator also includes: A noise reduction structure is provided on the cavity wall of the separation structure (20), and at least part of the noise reduction structure is made of noise reduction material to reduce the noise of the separation structure (20).

10. A compressor, characterized in that, The compressor includes the oil-gas separator according to any one of claims 1 to 9.

Images