Oil and gas separation device and compressor

Abstract

The application provides an oil-gas separation device and a compressor, wherein the oil-gas separation device comprises: an oil separation cover body, which comprises an exhaust port, an oil separation seat and an oil separation cover, the oil separation cover covers the oil separation seat, an oil-gas separation space is left between the oil separation cover and the oil separation seat, the exhaust port is arranged on the oil separation cover, and a spiral oil separation channel is arranged in the oil-gas separation space and surrounds the exhaust port in a spiral path; an air inlet hole for guiding oil gas to enter a peripheral inlet of the spiral oil separation channel is arranged on the oil separation seat, an oil return hole is arranged at the end of the inner ring of the spiral oil separation channel, and separated machine oil flows out from the oil return hole; the exhaust port is close to the end of the inner ring of the spiral oil separation channel and communicates with the end of the inner ring, and gaseous refrigerant is guided to flow out from the exhaust port. The application can utilize the difference between the oil droplets of the refrigerating machine oil and the mass density of the refrigerant, guide the airflow into the spiral oil separation cover, separate the oil by utilizing the change of centrifugal force, and thus the oil baffle structure is omitted, the wind resistance loss caused by the oil baffle is reduced, and the reliability is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressor oil emission reduction, in particular, to an oil-gas separation device and a compressor. BACKGROUND

[0002] The existing rotary compressor generally needs to add refrigerant oil in the shell. The refrigerant oil mainly plays a role of lubrication, cooling and sealing in the compressor. Since the shell of the rotary compressor is in a high-temperature and high-pressure environment in actual operation, and the refrigerant oil entering the pump body will be discharged from the compressor shell in the form of gas mist, and enter the refrigeration system circulation. The refrigerant oil entering the system circulation will bring the following adverse factors:

[0003] (1) High oil emission rate of the compressor will affect the circulation amount of the refrigerant itself, thereby reducing the refrigerating capacity.

[0004] (2) The refrigerant oil adhered to the inner wall of the heat exchanger pipeline will affect the heat exchange efficiency of the heat exchanger.

[0005] (3) For a multi-split air conditioner, multiple compressors are connected in parallel, and high oil emission rate will increase the risk of oil shortage and burning caused by poor oil return.

[0006] Therefore, reducing the oil emission rate is an important research topic in the design of the rotary compressor.

[0007] Figure 1 The present application relates to the field of compressor oil emission reduction, in particular, to an oil-gas separation device and a compressor. Figure 1 As shown in the figure, the existing compressor fixes the oil baffle 31' on the rotor of the motor 33' by rivets 32' to achieve the oil blocking effect, preventing the refrigerant oil 34' from being discharged from the compressor. The existing oil emission reduction scheme generally adopts the form of installing an oil baffle on the motor rotor or the crankshaft. The existing structure has the following two problems:

[0008] (1) The oil baffle rotates at high speed with the rotor, and the wind resistance is large, which will cause a certain power loss.

[0009] (2) The installation of the oil baffle generally adopts riveting or buckle mode, and is affected by the riveting state or the installation state. Under the condition of high-speed operation, there is still a risk of falling off due to installation defects.

[0010] Therefore, the present application provides an oil-gas separation device and a compressor. SUMMARY

[0011] In view of the problems in the prior art, the oil-gas separation device and the compressor provided by the present application can utilize the difference in the oil droplets of the refrigerating machine oil and the mass density of the refrigerant, introduce the gas flow into the spiral oil separation cover, utilize the change in the centrifugal force, and achieve the oil separation effect, while the oil baffle structure can be omitted, so as to reduce the wind resistance loss caused by the oil baffle and the reliability risk caused by the riveting of the oil baffle.

[0012] Embodiments of the present application provide an oil-gas separation device, comprising:

[0013] a spiral oil separation cover body, comprising an exhaust port, an oil separation seat and an oil separation cover, the oil separation cover covers the oil separation seat, and an oil-gas separation space is left between the oil separation cover and the oil separation seat, the exhaust port is arranged on the oil separation cover;

[0014] and a spiral oil separation channel in a spiral path around the exhaust port in the oil-gas separation space, the oil separation seat is provided with an air inlet hole for guiding the oil-gas to enter the peripheral inlet of the spiral oil separation channel, and the inner ring end of the spiral oil separation channel is provided with an oil return hole, and the separated machine oil flows out from the oil return hole;

[0015] the exhaust port is close to the inner ring end of the spiral oil separation channel and communicates with the inner ring end, and the gaseous refrigerant is guided to be discharged from the exhaust port.

[0016] Preferably, the pattern of the cross section of the spiral oil separation channel is one of a planar spiral, an Archimedes spiral, a logarithmic spiral and a hyperbolic spiral.

[0017] Preferably, the distance from the air inlet hole to the center of the exhaust port is greater than the distance from the oil return hole to the center of the exhaust port.

[0018] Preferably, as the oil-gas enters the spiral oil separation channel, the radius of the position where the oil-gas is located in the spiral path decreases, and the angular velocity of the oil-gas increases.

[0019] Preferably, the oil separation seat comprises a connecting plate and a baffle plate, the baffle plate is a conical frustum structure protruding from the lower surface of the connecting plate, the spiral oil separation channel is a planar spiral pipeline spiraling from the outside to the inside based on the upper surface of the connecting plate, the lower surface of the connecting plate and the baffle plate jointly enclose an oil storage space, and the oil return hole at the inner ring end of the spiral oil separation channel communicates with the oil storage space.

[0020] Preferably, the oil separation seat comprises a baffle, the baffle is a downwardly convex frustum structure, the connecting plate is connected around the outer periphery of the baffle, and the spiral oil separation channel is a spiral pipe based on the inner wall of the frustum structure, which is spirally downward and inward from the top to the bottom.

[0021] Preferably, the oil-gas separation device further comprises a connecting pipe, the connecting pipe is inserted into the oil-gas separation space through the exhaust port, a refrigerant flow hole is formed in the side wall of the connecting pipe, and the refrigerant flow hole is communicated with the inner end of the spiral oil separation channel.

[0022] Preferably, the connecting pipe is provided with an oil outlet hole, the oil outlet hole guides the machine oil flowing out of the oil return hole to flow out of the connecting pipe.

[0023] Preferably, the oil separation cover is upwardly folded at the exhaust port to form a flange structure.

[0024] Preferably, the channel width of the spiral oil separation channel is tapered from the outer periphery of the oil separation seat to the center.

[0025] The embodiment of the present application also provides a compressor, comprising the oil-gas separation device as described above, the oil-gas separation device is fixed in the shell of the compressor, located above the motor, and a wire hole is formed in the oil-gas separation device for the power line of the motor to pass through.

[0026] Preferably, the compressor comprises an upper support bearing defining a crankshaft, the oil-gas separation device is fixed above the upper support bearing, the oil return hole guides the machine oil to the friction pair of the upper support bearing, and the upper support bearing is provided with a drain hole.

[0027] Preferably, the outer periphery of the oil-gas separation device is fixed with the inner periphery of the shell of the compressor, a connecting port is formed in the oil separation seat, the connecting port is sleeved in the shaft hole of the upper support bearing, and the oil return hole is communicated with the connecting port.

[0028] Preferably, the oil-gas separation device is connected to the lower surface of the upper shell cover of the compressor, or the oil-gas separation device is integrally formed with the upper shell cover of the compressor, and the exhaust port is fixed and communicated with the exhaust pipe at the upper shell cover of the compressor.

[0029] Preferably, it further comprises an oil guide pipe communicated with the oil return hole.

[0030] The oil-gas separation device and compressor of the present invention can utilize the mass density difference between oil droplets of refrigeration oil and refrigerant, and achieve oil separation effect by introducing airflow into the spiral oil separator and utilizing the change of centrifugal force. At the same time, the oil baffle structure can be eliminated, thereby reducing the wind resistance loss caused by the oil baffle and the reliability risk caused by the riveting of the oil baffle. Attached Figure Description

[0031] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of a compressor structure in the prior art.

[0033] Figure 2 This is a schematic diagram of the structure of a first compressor using the first oil-gas separation device of the present invention.

[0034] Figure 3 This is a perspective view of the oil-gas separation device of the present invention.

[0035] Figure 4 This is a bottom view of the oil-gas separation device of the present invention.

[0036] Figure 5 for Figure 4 A cross-sectional view along the PP direction.

[0037] Figure 6 This is a side view of the oil-gas separation device of the present invention.

[0038] Figure 7 for Figure 6 Sectional view along the RR direction.

[0039] Figure 8 This is a schematic diagram of a second compressor structure using the second type of oil-gas separation device of the present invention.

[0040] Figure 9 This is a schematic diagram of a third compressor structure using the first oil-gas separation device of the present invention.

[0041] Figure 10 This is a schematic diagram of a fourth compressor structure using the second type of oil-gas separation device of the present invention.

[0042] Figure Labels

[0043] 31' oil deflector

[0044] 32' rivet

[0045] 33' motor

[0046] 34' Refrigeration oil

[0047] 1. Oil-gas separation unit

[0048] 10. Exhaust pipe

[0049] 11-point oil seat

[0050] 111 Connecting plate

[0051] 112 Baffle

[0052] 12-point oil cover

[0053] 13 Spiral oil separator channel

[0054] 14 Air intake holes

[0055] 15 Oil return holes

[0056] 16 Oil-gas separation space

[0057] 17. Oil storage space

[0058] 18 Connecting pipe

[0059] 2. Shell

[0060] 21 Through-hole for wiring

[0061] 3. Upper support bearing

[0062] 4 motors

[0063] 5. Top cover

[0064] 51 Oil guide tube Detailed Implementation

[0065] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0066] Figure 2 This is a schematic diagram of the structure of a first compressor using the first oil-gas separation device of the present invention. Figure 3 This is a perspective view of the oil-gas separation device of the present invention. Figure 4 This is a bottom view of the oil-gas separation device of the present invention. Figure 5 for Figure 4 A cross-sectional view along the PP direction. Figure 6 This is a side view of the oil-gas separation device of the present invention. Figure 7 for Figure 6 A sectional view along the RR direction. (e.g.) Figures 2 to 7As shown, in the first compressor using the first oil-gas separation device 1 of the present application, the compressor includes an upper support bearing 3 defining a crankshaft and a motor 4 driving the rotation of the crankshaft, and the oil return hole 15 of the oil separation cover body guides the oil to the friction pair of the upper support bearing 3 so as to improve the lubrication state of the upper support sliding bearing by using the separated oil. Moreover, in order to prevent the excessive accumulation of oil in the upper support, the upper support bearing 3 is provided with a drain hole to avoid the excessive accumulation of the oil return at the upper support bearing. The outer periphery of the oil-gas separation device 1 is fixed with the inner periphery of the shell of the compressor, the exhaust pipe 10 exposed at the first side (lower side) of the oil-gas separation device 1 is sleeved in the shaft hole of the upper support bearing 3, and the oil-gas separation device 1 and the upper support bearing 3 are provided with a wire passing hole 21 for the power line of the motor 4 to pass through.

[0067] The first oil-gas separation device 1 of the present application includes an oil separation cover body 1, the oil separation cover body 1 includes an exhaust port 10, an oil separation seat 11 and an oil separation cover 12, the oil separation cover 12 covers the oil separation seat 11, and an oil-gas separation space 16 is left between the two, and the exhaust port 10 is arranged on the oil separation cover 12. The oil-gas separation space 16 is provided with a spiral oil separation channel 13 surrounding the exhaust port 10 in a spiral path, the oil separation seat 11 is provided with an air inlet hole 14 guiding the oil-gas into the outer periphery inlet of the spiral oil separation channel 13, the inner ring end of the spiral oil separation channel 13 is provided with an oil return hole 15, and the separated oil flows out from the oil return hole 15. The exhaust port 10 is close to the inner ring end of the spiral oil separation channel 13 and communicates with it, guiding the gaseous refrigerant to be discharged from the exhaust port 10, but not limited thereto.

[0068] In a preferred embodiment, the pattern of the cross section of the spiral oil separation channel 13 is one of a planar spiral, an Archimedes spiral, a logarithmic spiral, and a hyperbolic spiral, but not limited thereto.

[0069] In a preferred embodiment, the distance from the air inlet hole 14 to the center of the exhaust port 10 is greater than the distance from the oil return hole 15 to the center of the exhaust port 10, but not limited thereto.

[0070] In a preferred embodiment, as the distance of the oil-gas entering the spiral oil separation channel 13 increases, the radius of the position where the spiral type path is located decreases, and the angular velocity of the oil-gas increases, but not limited thereto.

[0071] In a preferred embodiment, the oil separation seat 11 includes a connecting plate 111 and a baffle plate 112, the baffle plate 112 is a conical frustum structure protruding from the lower surface of the connecting plate 111, the spiral oil separation channel 13 is a planar spiral pipeline spiraling from outside to inside based on the upper surface of the connecting plate 111, the lower surface of the connecting plate 111 and the baffle plate 112 jointly form an oil storage space 17, and the oil return hole 15 at the inner ring end of the spiral oil separation channel 13 communicates with the oil storage space 17, but not limited thereto.

[0072] In a preferred embodiment, the oil separation seat 11 comprises a baffle 112 in the shape of a downwardly protruding frustum, the connecting plate 111 is connected around the outer periphery of the baffle 112, and the spiral oil separation channel 13 is a spiral pipe in the shape of a frustum arranged on the inner wall of the frustum, spiraling from top to bottom and from outside to inside, and the height of the position of the spiral path where the oil and gas enter the spiral oil separation channel 13 decreases with the increase of the distance, but not limited thereto.

[0073] In a preferred embodiment, the oil and gas separation device further comprises a connecting pipe 18 inserted into the oil and gas separation space 16 through the exhaust port, and a refrigerant through hole 19 is formed in the side wall of the connecting pipe 18, which is connected to the inner end of the spiral oil separation channel 13, but not limited thereto.

[0074] In a preferred embodiment, an oil outlet hole 20 is further arranged on the connecting pipe 18, which guides the machine oil flowing out of the oil return hole 15 to flow out of the connecting pipe 18, but not limited thereto.

[0075] In a preferred embodiment, the oil separation cover is folded upward at the exhaust port 10 to form a flange structure, but not limited thereto.

[0076] In a preferred embodiment, the width of the spiral oil separation channel 13 gradually decreases from the outer periphery to the center of the oil separation seat 11, but not limited thereto.

[0077] In a preferred embodiment, the compressor comprises an upper support bearing 3 defining a crankshaft, the oil and gas separation device is fixed above the upper support bearing 3, the oil return hole 15 guides the machine oil to the friction pair of the upper support bearing 3, and the upper support bearing 3 is provided with a oil leakage hole, but not limited thereto.

[0078] In a preferred embodiment, the outer periphery of the oil and gas separation device is fixed with the inner periphery of the shell 2 of the compressor, a connecting port is formed on the oil separation seat 11, the connecting port is sleeved in the shaft hole of the upper support bearing 3, and the oil return hole 15 is communicated with the connecting port, but not limited thereto.

[0079] In a preferred embodiment, the oil and gas separation device is connected to the lower surface of the upper shell cover 5 of the compressor, or the oil and gas separation device is integrally formed with the upper shell cover 5 of the compressor, and the exhaust port 10 is fixed and communicated with the exhaust pipe 6 at the upper shell cover 5 of the compressor, but not limited thereto.

[0080] In a preferred embodiment, a oil guide pipe 51 is further arranged, which is communicated with the oil return hole 15 and guides the machine oil flowing out of the oil return hole to the friction pair of the upper support bearing, but not limited thereto.

[0081] The present application can be used in combination with an upper support structure of a compressor or used alone without the upper support structure. After using the structure, an oil baffle can be installed on a motor rotor, and the oil circulation rate of the compressor can be reduced by using the centrifugal oil separation effect of the spiral oil-gas separation cover. By using the structure, the oil baffle no longer rotates with the rotor while reducing the oil circulation rate of the compressor, thereby reducing the wind resistance of the rotor during rotation, improving the rotation speed, and solving the wind resistance loss and reliability risk caused by the installation of the oil baffle. When the separation cover is used in combination with the upper support structure, the separated oil can be introduced into the upper support bearing, thereby improving the lubrication state of the upper support sliding bearing and improving the reliability of the upper support. According to the centripetal force formula: F = mrω 2 , F is the centripetal force, m is the mass, r is the radius, and ω is the angular velocity. When the airflow flows from the outside of the spiral line to the center, if the flow rate is unchanged, as the radius r decreases, the angular velocity ω increases, the centrifugal separation effect increases, and different mass particles in the airflow are separated due to different masses, with the mass being large on the outside and the mass being small on the inside. The mass of the refrigeration oil droplets is large, so they flow close to the spiral plate side and are separated out.

[0082] Example One

[0083] Reference Figures 2 to 7 As shown in the figure, in example one, the compressor includes an upper support bearing 3 defining a crankshaft, the oil-gas separation device 1 is fixed above the upper support bearing 3, the oil return hole 15 guides the oil to the friction pair of the upper support bearing 3, and the upper support bearing 3 is provided with a oil leakage hole. The outer periphery of the oil-gas separation device 1 is fixed with the inner periphery of the shell 2 of the compressor, a connecting port is provided on the oil separation seat 11, the connecting port is sleeved in the shaft hole of the upper support bearing 3, and the oil return hole 15 communicates with the connecting port. In this embodiment, the oil separation seat 11 includes a connecting plate 111 and a baffle plate 112, the baffle plate 112 is a conical frustum structure protruding from the lower surface of the connecting plate 111, the spiral oil separation channel 13 is a plane spiral pipeline arranged from the outside to the inside based on the upper surface of the connecting plate 111, the lower surface of the connecting plate 111 and the baffle plate 112 jointly form an oil storage space 17, and the oil return hole 15 at the inner end of the spiral oil separation channel 13 communicates with the oil storage space 17. Due to the mass of the oil droplets being greater than that of the refrigerant, the oil droplets flow close to the plate side during the spiral acceleration process, thereby being guided to the oil return hole along the pipe wall. The present application utilizes the mass density difference between the oil droplets of the refrigeration oil and the refrigerant, introduces the airflow into the spiral oil separation cover, utilizes the change of the centrifugal force, and has a oil separation effect, and at the same time, the oil baffle structure can be omitted, thereby reducing the wind resistance loss caused by the oil baffle and the reliability risk caused by the riveting of the oil baffle.

[0084] Example Two

[0085] Reference Figure 8As shown, in the second embodiment, the oil-gas separation device 1 is also fixed above the upper support bearing 3, but different from the first embodiment, the oil separation seat 11 comprises a baffle 112, which is a downwardly protruding frustum structure, and the connecting plate 111 is connected around the outer periphery of the baffle 112, and the spiral oil separation channel 13 is a spiral pipe based on the inner wall of the frustum structure, which spirals from top to bottom and from outside to inside. As the oil-gas enters the spiral oil separation channel 13, the height of the position where the spiral type path is located decreases, and the manufacturing process difficulty of the second embodiment is higher than that of the first embodiment, but a better oil separation effect can be obtained.

[0086] Preferably, the oil separation cover 12 is folded upward at the exhaust port 10 to form a flange structure, and the flange structure has a trapezoidal shape with a wide upper part and a narrow lower part in the longitudinal cross section.

[0087] Embodiment three:

[0088] Reference Figure 9 As shown, in the third embodiment, the oil-gas separation device 1 is connected to the lower surface of the compressor upper shell cover 5, or the oil-gas separation device 1 is integrally formed with the compressor upper shell cover 5, and the exhaust port 10 is fixed and communicated with the exhaust pipe 6 at the compressor upper shell cover 5. Through an oil guide pipe 51, the oil return hole 15 is communicated, and through the oil guide pipe 51, the oil droplets are guided from the oil storage space to the friction pair of the upper support bearing 3 to lubricate the friction pair of the upper support bearing 3. The difference between the third embodiment and the first embodiment is that the oil-gas separation device 1 is integrally formed with the compressor upper shell cover 5, which further strengthens the structural strength of the compressor, and the oil-gas separation device 1 is located at the highest end of the entire internal space of the compressor, which helps to more effectively play the oil separation effect.

[0089] Embodiment four:

[0090] Reference Figure 10As shown, in the fourth embodiment, the oil separation seat 11 in the oil-gas separation device 1 combines the advantages of the second and third embodiments. The baffle 112 is a downwardly protruding frustum structure, the connecting plate 111 is connected around the outer periphery of the baffle 112, and the spiral oil separation channel 13 is a spiral pipe based on the inner wall of the frustum structure, spiraling from top to bottom and from outside to inside. As the oil-gas enters the spiral oil separation channel 13, the height of the position where the spiral path is located decreases, and the oil-gas separation device 1 is connected to the lower surface of the compressor upper shell cover 5, or the oil-gas separation device 1 is integrally formed with the compressor upper shell cover 5, and the exhaust port 10 is fixed and communicated with the exhaust pipe 6 at the compressor upper shell cover 5. The oil return hole 15 is connected through an oil guide pipe 51. Therefore, the fourth embodiment combines the advantages of the second and third embodiments, i.e., the frustum spiral pipe is used, and the height position of the oil-gas separation device 1 is improved. Compared with the first, second and third embodiments, the fourth embodiment can obtain the best oil separation effect.

[0091] In summary, the oil-gas separation device and the compressor of the present application can utilize the difference in mass density between oil droplets and refrigerant, introduce the gas flow into the spiral oil separation cover, utilize the change in centrifugal force, and achieve the oil separation effect. At the same time, the oil baffle structure can be omitted, thereby reducing the wind resistance loss caused by the oil baffle and the reliability risk caused by the riveting of the oil baffle.

[0092] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered as falling within the protection scope of the present application.

Claims

1. A compressor characterized by, The oil-gas separation device comprises: a separator cover body (1) comprising an exhaust port (10), a separator seat (11) and a separator cover (12), the separator cover (12) covers the separator seat (11) and leaves an oil-gas separation space (16) between them, the exhaust port (10) is arranged on the separator cover (12); a connecting pipe (18) inserted into the oil-gas separation space (16) through the exhaust port, a side wall of the connecting pipe (18) is provided with a refrigerant flow hole (19); and a spiral oil separation channel (13) in the oil-gas separation space (16) surrounding the exhaust port (10) in a spiral path, the separator seat (11) is provided with an air inlet hole (14) guiding oil gas to enter the outer peripheral inlet of the spiral oil separation channel (13), and the inner ring end of the spiral oil separation channel (13) is provided with an oil return hole (15) through which separated engine oil flows out; the exhaust port (10) is close to the inner ring end of the spiral oil separation channel (13) and communicates with the inner ring end, and the exhaust port (10) guides gaseous refrigerant to be discharged, the separator seat (11) comprises a connecting plate (111) and a baffle plate (112), the baffle plate (112) is a conical frustum structure protruding from the lower surface of the connecting plate (111), the spiral oil separation channel (13) is a planar spiral pipeline spiraling from the outside to the inside based on the upper surface of the connecting plate (111), the lower surface of the connecting plate (111) and the baffle plate (112) jointly form an oil storage space (17), the oil return hole (15) of the inner ring end of the spiral oil separation channel (13) communicates with the oil storage space (17), the refrigerant flow hole (19) communicates with the inner ring end of the spiral oil separation channel (13), the connecting pipe (18) is further provided with an oil outlet hole (20), the oil outlet hole (20) guides the engine oil flowing out of the oil return hole (15) to flow out of the connecting pipe (18), and the distance from the air inlet hole (14) to the center of the exhaust port (10) is greater than the distance from the oil return hole (15) to the center of the exhaust port (10); the compressor comprises an upper support bearing (3) defining a crankshaft, the oil-gas separation device is connected to the lower surface of the upper shell cover (5) of the compressor or is integrally formed with the upper shell cover (5) of the compressor, the exhaust port (10) is fixed and communicated with an exhaust pipe (6) at the upper shell cover (5) of the compressor, the oil return hole (15) is communicated through an oil guide pipe (51), and the oil guide pipe (51) guides oil droplets in the oil storage space (17) to a friction pair of the upper support bearing (3), the oil-gas separation device is fixed in the shell (2) of the compressor and located above the motor (4), and a wiring through hole (21) is arranged on the oil-gas separation device for the power line of the motor (4). ​ ​ 2. The compressor of claim 1, wherein, The pattern of the cross section of the spiral oil separation channel (13) is one of a planar spiral, an Archimedes spiral, a logarithmic spiral, and a hyperbolic spiral.

3. The compressor of claim 1, wherein, As the oil and gas travels in the spiral oil separation channel (13), the radius of the position where the spiral path is located decreases, and the angular velocity of the oil and gas increases.

4. The compressor of claim 1, wherein, The oil separation cover is folded upward at the exhaust port (10) to form a flange structure.

5. The compressor of claim 3, wherein, The channel width of the spiral oil separation channel (13) is tapered from the outer periphery of the oil separation seat (11) to the center.

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