Compressor and refrigeration equipment

Abstract

The present invention relates to a compressor and refrigeration equipment. The compressor includes: a housing having a chamber formed therein; a motor disposed in the chamber; a compression mechanism disposed in the chamber and including an exhaust valve hole and a crankshaft, the crankshaft being connected to the rotor of the motor; an exhaust separation device disposed above the compression mechanism and including an oil-gas separation housing, the oil-gas separation housing forming a cavity, the air inlet of the cavity communicating with the exhaust valve hole via a connecting pipe, and the exhaust port of the cavity communicating with an exhaust passage of the housing, wherein compressor exhaust gas discharged from the exhaust valve hole enters the cavity via the connecting pipe; and a centrifugal fan mounted on top of the crankshaft and located below the oil-gas separation housing, wherein the centrifugal fan is configured to rotate with the crankshaft and generate downward centrifugal suction, so that the compressor exhaust gas entering the cavity contacts the inner wall of the cavity to separate the oil and gas.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a compressor and refrigeration equipment. Background Art

[0002] Traditional rotary compressors are equipped with refrigerant oil within the casing to cool and lubricate internal components. However, as the compressor compresses the refrigerant, it also compresses a large amount of refrigerant oil flowing back into the compressor. This results in a large amount of oil-air mixture, which is then discharged out of the casing through the compressor exhaust pipe and enters the air conditioning system. As the refrigerant circulates through the system, the refrigerant oil carried out of the compressor easily accumulates in the condenser and evaporator, seriously affecting the efficiency of the condenser and evaporator, and ultimately the efficiency of the air conditioning system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a compressor and a refrigeration device.

[0004] The present invention provides a compressor, comprising: a shell, a chamber formed inside the shell; a motor, arranged in the chamber; a compression mechanism, arranged in the chamber, the compression mechanism including an exhaust valve hole and a crankshaft, the crankshaft being connected to the rotor of the motor; an exhaust separation device, arranged above the compression mechanism, the exhaust separation device including an oil-gas separation shell, the oil-gas separation shell forming a cavity, the air inlet of the cavity being connected to the exhaust valve hole through a connecting pipe, the exhaust port of the cavity being connected to the exhaust channel of the shell, wherein the compressor exhaust discharged from the exhaust valve hole enters the cavity via the connecting pipe; a centrifugal fan, installed on the top of the crankshaft and located below the oil-gas separation shell, wherein the centrifugal fan is used to rotate with the crankshaft and generate downward centrifugal suction, so that the compressor exhaust entering the cavity changes its flow rate and direction, so that the compressor exhaust contacts the inner wall surface of the cavity to separate the oil and gas.

[0005] In some embodiments, the exhaust separation device also includes an oil-liquid separation pipe located in the cavity, the inlet of the oil-liquid separation pipe is connected to the cavity, and the outlet of the oil-liquid separation pipe forms the exhaust port of the cavity and is connected to the exhaust channel of the outer shell, wherein the oil-liquid separation pipe is used for the compressor exhaust entering the cavity to contact the outer wall of the oil-liquid separation pipe to separate oil and gas, and the compressor exhaust after separation through the inner wall of the cavity and the outer wall of the oil-liquid separation pipe enters the oil-liquid separation pipe from the inlet of the oil-liquid separation pipe and contacts the inner wall of the oil-liquid separation pipe to separate oil and gas again.

[0006] In some embodiments, a gap is formed between the installation position of the centrifugal fan and the top of the crankshaft, and the gap is connected to the chamber for allowing the oil separated from the compressor exhaust to flow to the oil pool at the bottom of the chamber.

[0007] In some embodiments, the cavity includes an upper cavity and a lower cavity that are connected to each other, wherein the air inlet of the cavity is arranged in the upper cavity, and the centrifugal fan at least partially extends into the lower cavity.

[0008] In some embodiments, the upper cavity is a cylindrical cavity; and / or the lower cavity is any one of the following cavities: an inverted conical cavity, a trapezoidal cavity, or a cavity having a guide groove on the inner wall.

[0009] In some embodiments, a plurality of baffles extending toward the inner side of the lower cavity are provided on the inner wall surface of the lower cavity, and the plurality of baffles are distributed in the circumferential direction of the lower cavity. The baffles are used to contact the compressor exhaust in the lower cavity to separate the oil.

[0010] In some embodiments, the plurality of baffles form a plurality of rows of baffles distributed in a vertical direction along the lower cavity, wherein the plurality of rows of baffles are staggered in the vertical direction.

[0011] In some embodiments, the oil-liquid separation pipeline includes a lower pipeline portion, an upper pipeline portion and an intermediate pipeline portion connected between the lower pipeline portion and the upper pipeline portion, wherein the intermediate pipeline portion is spirally wound along the up and down directions of the cavity, the lower pipeline portion extends into the lower cavity, the intermediate pipeline portion is located in the upper cavity, and the upper pipeline portion is connected to the exhaust channel of the outer shell.

[0012] In some embodiments, the oil-liquid separation device is provided with a plurality of units forming a multi-stage oil-liquid separation device, wherein the multi-stage oil-liquid separation device units are connected in series or in parallel.

[0013] In some embodiments, the housing includes a housing body, an upper cover and a lower cover respectively arranged on the top and bottom of the housing body, the exhaust channel of the housing is arranged on the upper cover, wherein the upper cover is integrally formed with the exhaust separation device, and a wire channel is provided on the outer edge of the oil-liquid separation shell for passing the wires connected to the terminal of the motor.

[0014] In some embodiments, it further includes: an air suction separation device, which is arranged on the outer wall of the shell, and the outlet end of the air suction separation device is connected to the air suction valve hole of the compression mechanism.

[0015] The present invention also provides a refrigeration device, comprising: a compressor as described in any of the above embodiments.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] In the compressor of the present invention, the air inlet of the exhaust separation device is directly connected to the exhaust valve port of the compression mechanism (pump body assembly), and all compressed refrigerant is discharged from the compressor through the exhaust separation device. The compressed refrigerant is not in direct contact with the compressor housing, which effectively prevents the compressed refrigerant from undergoing heat convection in the compressor and effectively protects the compressor motor. The centrifugal fan is directly installed on the crankshaft and rotates with the crankshaft to generate centrifugal suction, without the need for a separate driving source, thereby reducing energy consumption. In addition, the centrifugal suction generated by the centrifugal fan changes the flow speed and flow direction of the compressed exhaust gas in the cavity of the exhaust separation device, further promoting full contact between the compressed exhaust gas and the inner wall of the cavity, and greatly improving the oil-gas separation efficiency, thereby reducing the oil content of the compressor exhaust gas, improving the refrigeration capacity of the compressor, and enhancing the energy efficiency of the compressor.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0020] Figure 1 is a cross-sectional view of a compressor according to an exemplary embodiment of the present invention;

[0021] Figure 2 is a cross-sectional view of an exhaust gas separation device according to an exemplary embodiment of the present invention;

[0022] Figure 3 is a longitudinal cross-sectional view of an exhaust gas separation device according to an exemplary embodiment of the present invention;

[0023] Figure 4 is a simplified structural diagram of an exhaust gas separation device according to an exemplary embodiment of the present invention;

[0024] Figure 5 2 is a simplified structural diagram of a multi-stage exhaust gas separation device connected in series according to an exemplary embodiment of the present invention;

[0025] Figure 6 is a simplified structural diagram of a multi-stage exhaust separation device in parallel according to an exemplary embodiment of the present invention;

[0026] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terms "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "in contact," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] The present invention provides a compressor, in which the air inlet of the exhaust separation device is directly connected to the exhaust valve port of the compression mechanism (pump body assembly), and all compressed refrigerant is discharged from the compressor through the exhaust separation device. The compressed refrigerant is not in direct contact with the compressor casing, which effectively prevents the compressed refrigerant from performing heat convection in the compressor and effectively protects the compressor motor.

[0030] like Figures 1-6 As shown, the compressor of the present invention includes: a housing 10 , a motor 20 , a compression mechanism 30 , an exhaust separation device 40 and a centrifugal fan 50 .

[0031] A chamber is formed inside the housing 10. A motor 20 is disposed in the chamber. The motor 20 includes a stator and a rotor.

[0032] The compression mechanism 30 is disposed within the interior chamber of the housing 10 and includes an exhaust valve hole 32 and a crankshaft 31. The crankshaft 31 is connected to the rotor of the motor 20. The compression mechanism 30 may be a rotary compressor, such as a twin-rotor compressor. A twin-rotor compressor includes an upper flange, a lower flange, an upper cylinder, a lower cylinder, an upper roller disposed within the upper cylinder, a lower roller disposed within the lower cylinder, and a pump body partition disposed between the upper and lower cylinders. The exhaust valve hole 32 may be disposed in the upper flange.

[0033] The exhaust separation device 40 is arranged in the internal chamber of the shell 10 and is located above the compression mechanism 30. The exhaust separation device 40 includes an oil-gas separation shell, which forms a cavity. The air inlet 401 of the cavity is connected to the exhaust valve hole 32 of the compression mechanism 30 through a connecting pipe 35, and the exhaust port of the cavity is connected to the exhaust channel 14 of the compressor shell 10, wherein the compressor exhaust discharged from the exhaust valve hole 32 enters the internal cavity of the shell of the exhaust separation device 40 through the connecting pipe 35, and contacts the inner circumferential wall of the cavity to perform oil and gas separation.

[0034] The centrifugal fan 50 is installed on the crankshaft 40, for example, on the top of the crankshaft 40, and is located below the oil-gas separation housing, wherein the centrifugal fan 50 can rotate with the crankshaft 40 and generate downward centrifugal suction, which is used to change the flow rate and direction of the compressor exhaust entering the oil-gas separation housing cavity, so that the compressor exhaust is in full contact with the inner wall of the cavity to separate the oil and gas, for example, the compressor exhaust is rotated and contacted along the inner circumferential wall of the cavity, so that the oil and gas are separated more fully.

[0035] The compressor exhaust discharged from the exhaust valve hole 32 of the compression mechanism 30 directly enters the internal cavity of the exhaust separation device 40. Driven by the crankshaft 31, the centrifugal fan 50 rotates to generate downward centrifugal suction. The compressor exhaust in the internal cavity of the exhaust separation device 40 changes its flow speed and direction. It first rotates circumferentially along the inner wall of the cavity, and throws the refrigeration oil mixed in the compressor exhaust onto the inner wall of the cavity. The oil flows downward along the inner wall of the cavity to the oil pool at the bottom of the compressor shell chamber. In the compressor of the present invention, the air inlet of the exhaust separation device is directly connected to the exhaust valve hole 32 of the compression mechanism (pump body assembly). The compressed refrigerant (compressor exhaust) is all discharged through the exhaust separation device 40. The compressed refrigerant is not in direct contact with the compressor shell, which effectively prevents the compressed refrigerant from undergoing heat convection in the compressor and effectively protects the compressor motor. In addition, the centrifugal fan 50 is directly installed on the crankshaft 40 and rotates with the crankshaft to generate centrifugal suction. There is no need to set up a separate drive source, thereby reducing energy consumption. Furthermore, the centrifugal suction generated by the centrifugal fan 50 changes the flow velocity and flow direction of the compressed exhaust gas in the cavity of the exhaust separation device 40, further promoting full contact between the compressed exhaust gas and the inner wall of the cavity, greatly improving the oil-gas separation efficiency, thereby reducing the oil content of the compressor exhaust, improving the cooling capacity of the compressor, and enhancing the energy efficiency of the compressor.

[0036] In some embodiments, as Figure 1-Figure 3As shown, the exhaust separation device 40 also includes an oil-liquid separation pipe 43 located in the cavity, the inlet of the oil-liquid separation pipe 43 is connected to the cavity, and the outlet of the oil-liquid separation pipe 43 forms the exhaust port of the cavity and is connected to the exhaust channel 14 of the shell, wherein the oil-liquid separation pipe 43 is used to make the compressor exhaust entering the cavity contact with the outer wall of the oil-liquid separation pipe 43 to separate the oil and gas, and the compressor exhaust after separation through the inner wall of the cavity and the outer wall of the oil-liquid separation pipe 43 enters the oil-liquid separation pipe 43 from the inlet of the oil-liquid separation pipe 43, and contacts the inner wall of the oil-liquid separation pipe 43 to separate the oil and gas again, so that the compressor exhaust can be more fully separated.

[0037] Specifically, after the compression mechanism 30 starts working, the compressed refrigerant (compressor exhaust) is discharged from the upper flange exhaust valve hole 32, enters the connecting pipe 35, and then enters the cavity of the exhaust separation device through the oil-gas separation device air inlet 401. Under the action of the centrifugal suction of the centrifugal fan 50, the refrigerant will fully contact the inner wall of the cavity and the outer wall of the oil-liquid separation pipe 43 in the cavity and perform oil and gas separation. After separation, the oil (refrigerant) flows along the inner wall of the cavity and the outer wall of the oil-liquid separation pipe 43 to the bottom oil pool. The separated refrigerant gas enters the oil-liquid separation pipe 43 from the inlet of the oil-liquid separation pipe 43 and contacts the inner wall of the oil-liquid separation pipe 43 for further oil and gas separation. Finally, the refrigerant gas that has been separated again is discharged from the exhaust channel 14 of the outer shell, and the oil that has been separated again flows from the inner wall of the oil-liquid separation pipe 43 to the bottom oil pool.

[0038] In some embodiments, a gap is formed between the installation position of the centrifugal fan 50 and the top of the crankshaft 31. The gap is connected to the chamber for allowing the oil separated from the compressor exhaust to flow to the oil pool at the bottom of the chamber.

[0039] In some embodiments, as Figure 1 and Figure 3 As shown, the cavity of the exhaust separation device 40 includes an upper cavity 41 and a lower cavity 42 which are connected to each other, wherein the air inlet 401 ( Figure 2 As shown) is arranged in the upper cavity 41, and the centrifugal fan 50 at least partially extends into the lower cavity 42.

[0040] In some embodiments, the above-mentioned oil-liquid separation pipeline 43 includes a lower pipeline portion 431, an upper pipeline portion 433 and an intermediate pipeline portion 432 connected between the lower pipeline portion 431 and the upper pipeline portion 433, wherein the intermediate pipeline portion 432 is spirally wound along the up and down directions of the cavity, the lower pipeline portion 431 extends into the lower cavity 42, the intermediate pipeline portion 432 is located in the upper cavity 41, and the upper pipeline portion 433 is connected to the exhaust channel 14 of the outer shell.

[0041] Specifically, after the compression mechanism 30 starts working, the compressed refrigerant (compressor exhaust) is discharged from the upper flange exhaust valve hole 32, enters the connecting pipe 35, and then enters the cavity of the exhaust separation device through the oil-gas separation device air inlet 401. Under the action of the centrifugal suction of the centrifugal fan 50, the refrigerant will first collide with the intermediate pipe part 432 formed by the spiral winding in the upper cavity 41 to break up the refrigerant. At the same time, the refrigerant will collide with the inner wall surface of the upper cavity 41, that is, the refrigerant and the inner wall surface of the upper cavity 41 and the intermediate pipe part 432 formed by the spiral winding are separated into oil and gas. Then, under the centrifugal suction of the centrifugal fan 50, the refrigerant in the upper cavity 41 spirals downward along the inner wall of the upper cavity 41 to reach the lower cavity 42. At the same time, the refrigerant in the lower cavity 42 is subjected to the strong centrifugal suction of the centrifugal fan 50, and the refrigeration oil mixed in the refrigerant will be thrown onto the inner wall surface of the lower cavity 42 for oil-gas separation; at the same time, the refrigerant continues to spiral downward and will continuously collide with the multiple baffles 44 on the inner wall surface of the lower cavity 42, changing the flow rate and direction of the refrigerant, so that the refrigeration oil mixed in the refrigerant is gradually adsorbed on the multiple baffles 44. Under the action of gravity, the refrigeration oil adsorbed on the inner wall surface of the lower cavity 42 and the multiple baffles 44 will settle down under the action of gravity, flow into the bottom of the exhaust separation device 40, and flow into the oil pool from the connecting gap between the centrifugal fan 50 and the crankshaft 31.

[0042] After the first separation, the refrigerant will pass through the lower pipe part 431 in the middle of the exhaust separation device 40 and enter the middle pipe part 432 formed by spiral winding. The refrigerant will produce multiple strong collisions with the pipe wall at the bend of the middle pipe part 432 formed by spiral winding, constantly changing the refrigerant flow rate, so that the refrigeration oil mixed in the refrigerant is adsorbed on the pipe wall. Under the action of gravity, it gradually settles in the pipe and flows into the bottom of the exhaust separation device 40, and finally flows into the oil pool from the connection gap between the centrifugal fan 50 and the crankshaft 31, thereby completing the secondary separation.

[0043] Furthermore, in some embodiments, a plurality of baffles 44 extending toward the inner side of the lower cavity 41 are provided on the inner wall surface of the lower cavity 41, and the plurality of baffles 44 are distributed in the circumferential direction of the lower cavity 41. The baffles 41 are used to contact the compressor exhaust in the lower cavity 41 to separate the oil.

[0044] The plurality of baffles 44 form a plurality of rows of baffles 44 distributed in the vertical direction of the lower cavity 41 , wherein the plurality of rows of baffles 44 are staggered in the vertical direction.

[0045] After the compressed refrigerant is blocked by the baffles 44 in the first row, the two split airflows will flow out from the upper and lower surfaces of the baffles 44. These two airflows will then collide with the baffles in the next row, thus circulating within the lower chamber 42. This increases the collision rate between the refrigerant and the baffles, allowing the compressed refrigerant to fully collide with the baffles 44 in the lower chamber 42, effectively improving the interactive collision between the compressed refrigerant and the baffles, and enhancing the adsorption of the refrigerant oil on the baffles. Furthermore, optionally, the angle between each two rows of baffles 44 can be adjusted as needed, and the structure of the baffles 44 can also be adjusted accordingly, such as using baffles with spherical grooves or fins. Furthermore, optionally, the upper chamber 41 is cylindrical. And / or, the lower chamber 42 is any of the following: an inverted conical chamber, a trapezoidal chamber, or a chamber with guide grooves on the inner wall.

[0046] In some embodiments, as Figure 5 and Figure 6 As shown, the oil separation device 40 is provided with a plurality of units forming a multi-stage oil separation device, wherein the multi-stage oil separation device units are connected in series ( Figure 5 shown) or connected in parallel ( Figure 6 shown).

[0047] As an example, Figure 5 As shown, the air inlet of the right exhaust separation device 40 is connected to the exhaust valve hole 32, and the compressed refrigerant directly enters the right first-stage exhaust separation device 40. The exhaust port of the right first-stage exhaust separation device 40 is connected to the air inlet of the left second-stage exhaust separation device 40 via a series connection channel. The compressed refrigerant is ultimately discharged from the exhaust channel 14 through the exhaust port of the left second-stage exhaust separation device 40. Similarly, the size of each stage of the exhaust separation device 40 can be adjusted as needed to achieve a series connection of multiple stages of exhaust separation devices 40. By using such series exhaust separation devices 40, the oil and gas separation capability of the device is greatly enhanced.

[0048] As another example, Figure 5 As shown, the compressed refrigerant enters the upper and lower exhaust separation devices 40 through the parallel connection channels of the air inlets of the upper and lower exhaust separation devices 40, and then the refrigerant separated by the upper and lower exhaust separation devices 40 enters the connection channel parallel to the exhaust ports of the two-stage exhaust separation devices 40 and is discharged from the exhaust channel 14. Similarly, the size of the exhaust separation device 40 can be adjusted according to the needs and the inner diameter of the compressor shell to realize an oil-gas exhaust separation device with multiple exhaust separation devices 40 connected in parallel. Although Figure 6 FIG. 4 shows that the two-stage exhaust separation device 40 is arranged vertically, but it is not limited thereto. Sometimes, it can be arranged left and right as needed, and the number of the exhaust separation device 40 can also be configured as needed.

[0049] In some embodiments, as Figure 1 As shown, the housing 10 includes a housing body 13, an upper cover 11 and a lower cover 12 respectively arranged on the top and bottom of the housing body, the exhaust channel of the housing 10 is arranged on the upper cover 11, wherein the upper cover 11 and the exhaust separation device 40 are integrally formed, and a wire channel is provided on the outer edge of the oil-liquid separation housing 10 for the wires connected to the terminal blocks of the motor 20 to pass through.

[0050] In some embodiments, as Figure 1 As shown, it also includes: an air suction separation device 60 is arranged on the outer wall of the shell 10, and the outlet end of the air suction separation device 60 is connected to the air suction valve hole of the compression mechanism.

[0051] The present invention also provides a refrigeration device, comprising: a compressor as described in any of the above embodiments.

[0052] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0053] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0054] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0055] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0056] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A compressor, characterized in that: include: a housing, wherein a chamber is formed inside the housing; a motor, disposed in the chamber; a compression mechanism disposed in the chamber, the compression mechanism comprising an exhaust valve hole and a crankshaft, the crankshaft being connected to a rotor of the motor; an exhaust separation device disposed in the chamber and located above the compression mechanism, the exhaust separation device comprising an oil-gas separation housing, the oil-gas separation housing forming a cavity, an air inlet of the cavity communicating with the exhaust valve hole via a connecting pipe, and an exhaust port of the cavity communicating with an exhaust passage of the housing, wherein compressor exhaust gas discharged from the exhaust valve hole enters the cavity via the connecting pipe and contacts an inner wall surface of the cavity to separate oil and gas; A centrifugal fan is installed on the crankshaft and is located below the oil-gas separation housing, wherein the centrifugal fan can rotate with the crankshaft and generate centrifugal suction for the compressor exhaust entering the cavity.

2. The compressor according to claim 1, characterized in that The exhaust separation device also includes an oil-liquid separation pipe located in the cavity, the inlet of the oil-liquid separation pipe is connected to the cavity, and the outlet of the oil-liquid separation pipe forms the exhaust port of the cavity and is connected to the exhaust channel of the shell, wherein the oil-liquid separation pipe is used to make the compressor exhaust entering the cavity contact with the outer wall surface of the oil-liquid separation pipe to separate oil and gas, and the compressor exhaust after separation through the inner wall surface of the cavity and the outer wall surface of the oil-liquid separation pipe enters the oil-liquid separation pipe from the inlet of the oil-liquid separation pipe and contacts with the inner wall surface of the oil separation pipe to separate oil and gas again.

3. The compressor according to claim 2, characterized in that A gap is formed between the centrifugal fan and the crankshaft installation position, and the gap is communicated with the chamber for allowing the oil separated from the compressor exhaust to circulate.

4. The compressor according to claim 2, characterized in that The cavity comprises an upper cavity and a lower cavity which are connected to each other, wherein the air inlet of the cavity is arranged in the upper cavity, and the centrifugal fan at least partially extends into the lower cavity.

5. The compressor according to claim 4, characterized in that The upper cavity is a cylindrical cavity; and / or, The lower cavity is any one of the following cavities: an inverted cone cavity, a trapezoidal cavity, and a cavity with a guide groove on the inner wall.

6. The compressor according to claim 4, characterized in that A plurality of baffles extending toward the inner side of the lower cavity are provided on the inner wall surface of the lower cavity. The plurality of baffles are distributed in the circumferential direction of the lower cavity. The baffles are used to contact the compressor exhaust in the lower cavity to separate oil and gas.

7. The compressor according to claim 6, characterized in that The plurality of baffles are formed into a plurality of rows of baffles distributed in a vertical direction of the lower cavity, wherein the plurality of rows of baffles are staggered in a vertical direction.

8. The compressor according to claim 4, characterized in that The oil-liquid separation pipeline includes a lower pipeline portion, an upper pipeline portion and an intermediate pipeline portion connected between the lower pipeline portion and the upper pipeline portion, wherein the intermediate pipeline portion is spirally coiled along the up and down directions of the cavity, the lower pipeline portion extends into the lower cavity, the intermediate pipeline portion is located in the upper cavity, and the upper pipeline portion is connected to the exhaust channel of the shell.

9. The compressor according to any one of claims 1 to 8, characterized in that A plurality of the exhaust gas separation devices are provided, wherein the plurality of the exhaust gas separation devices are connected in series or in parallel.

10. The compressor according to claim 1, characterized in that The shell includes a shell body and an upper cover arranged on the top of the shell body, the exhaust channel of the shell is arranged on the upper cover, wherein the upper cover and the exhaust separation device are integrally formed, and a wire channel is provided on the outer edge of the oil-gas separation shell for the power supply wire of the power supply machine to pass through.

11. The compressor according to claim 1, characterized in that Also includes: The air suction separation device is arranged on the outer wall of the shell, and the outlet end of the air suction separation device is communicated with the air suction valve hole of the compression mechanism.

12. A refrigeration device, characterized in that: include: The compressor according to any one of claims 1 to 11.

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