Exhaust oil separator structure, compressor and air conditioner

Abstract

The present application provides an exhaust oil separator structure, a compressor, and an air conditioner. The exhaust oil separator structure includes a base (281) and an oil separator cylinder (282). The oil separator cylinder (282) is rotatably mounted on the base (281) and can form an axial limit relative to the base (281). The top of the oil separator cylinder (282) is sealed. A through hole (282a) is formed in the side wall of the oil separator cylinder (282). An acute angle θ is formed between the extending direction of the through hole (282a) and a first plane. The first plane is a vertical plane that simultaneously passes through the center of the outer opening of the through hole (282a) and the central axis of the oil separator cylinder (282). According to the exhaust oil separator structure of the present application, the volume of the compressor can be reduced, the internal space of the compressor can be effectively utilized, and the oil separation efficiency and oil separation effect can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and particularly to an exhaust oil separation structure, a compressor, and an air conditioner. Background Art

[0002] A scroll compressor mainly consists of components such as a housing, a compression mechanism, a support mechanism, a drive mechanism, a working fluid suction pipe, and a working fluid discharge pipe. The compression mechanism is composed of a moving scroll member and a fixed scroll member. The drive mechanism includes a stator assembly and a crankshaft rotor assembly. The crankshaft drives the moving scroll member. Due to the anti-rotation mechanism provided on the moving scroll member, the moving scroll member performs a translational rotation relative to the fixed scroll member. The volume of the compression chamber defined by the spiral scroll of the fixed scroll member and the spiral scroll of the moving scroll member gradually decreases, and the refrigerant pressure in the chamber continuously increases. Thus, the refrigerant sucked into the compression chamber through the working fluid suction pipe is compressed and finally discharged from the exhaust port at the center of the scroll member and discharged from the compressor through the working fluid discharge pipe to the external refrigeration cycle circuit, thereby realizing the working cycle process of refrigerant suction, compression, and discharge.

[0003] In a scroll compressor, the oil circuit system plays an important role in its performance. Usually, the bottom of the compressor housing is set as a lubricating oil storage structure, and a lubricating oil pump is arranged near the lower end of the rotating shaft of the driving motor. The lubricating oil pump draws lubricating oil through the rotation of the rotating shaft and supplies it to each lubricating part to lubricate the compression mechanism and the bearings. During operation, the lubricating oil enters the inside of the compression mechanism to seal the tiny gap between the fixed scroll disk and the rotating scroll disk, prevent fluid leakage, and inhibit the reduction of the operating efficiency of the compressor.

[0004] In the existing scroll compressors, due to the high-speed rotation of the rotating shaft and the generation of a strong centrifugal force, the lubricating oil will enter the refrigeration cycle system together with the refrigerant through the compression mechanism, resulting in a reduction in refrigeration efficiency. In order to prevent excessive oil inside the compressor from entering the system circulation along with the refrigerant, an oil-gas separator is usually installed on the compressor discharge pipeline to separate the lubricating oil mixed in the refrigerant and recycle it back into the compressor. To solve the problem that the lubricating oil enters the system circulation along with the refrigerant during the operation of the compressor, there are various solutions in the prior art. For example, in Patent No. CN110914607A, an oil separation device is provided to separate the oil mixed in the refrigerant. The oil separation device is installed outside the compressor and connected to the discharge pipe. After the refrigerant passes through the oil separation device, the separated oil is depressurized through a throttling device and finally recycled into the upper support oil pool inside the compressor. However, such an oil-gas separator is installed outside the compressor, which increases the size of the compressor, occupies a large space, and reduces the space utilization rate. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present application is to provide an exhaust oil separation structure, a compressor and an air conditioner, which can reduce the volume of the compressor, effectively utilize the internal space of the compressor, and improve the oil separation efficiency and oil separation effect.

[0006] To solve the above problems, the present application provides an exhaust oil separation structure, including a base and an oil separation cylinder. The oil separation cylinder is rotatably mounted on the base and can form an axial limit relative to the base. The top of the oil separation cylinder is sealed, and through holes are provided on the side wall of the oil separation cylinder. An acute angle θ is formed between the extending direction of the through holes and a first plane, and the first plane is a vertical plane passing through the center of the outer opening of the through hole and the central axis of the oil separation cylinder.

[0007] Preferably, an oil guiding groove is provided on the end face of the base at the bottom of the oil separation cylinder, and the oil guiding groove extends along the radial direction of the oil separation cylinder.

[0008] Preferably, there are a plurality of through holes, which are evenly distributed along the circumferential direction of the oil separation cylinder.

[0009] Preferably, there are a plurality of through holes, and the plurality of through holes are divided into at least two groups arranged axially. The plurality of through holes in the same group are evenly distributed along the circumferential direction of the oil separation cylinder.

[0010] Preferably, 30° ≤ θ ≤ 60°.

[0011] Preferably, the through holes decrease in height along the direction close to the central axis of the oil separation cylinder, and an acute angle β is formed between the extending direction of the through holes and a second plane, and the second plane is a horizontal plane perpendicular to the central axis of the oil separation cylinder.

[0012] Preferably, 15° ≤ β ≤ 45°.

[0013] Preferably, the base includes a chassis and a bearing seat mounted on the chassis. A stop flange is provided at the end of the bearing seat away from the chassis, and a stop step is provided at the bottom of the oil separation cylinder. The stop flange forms an axial limit for the stop step.

[0014] Preferably, a bearing chamber is formed between the stop step and the stop flange, and a thrust bearing is provided in the bearing chamber.

[0015] Preferably, the oil separation cylinder is sleeved outside the bearing seat, or the oil separation cylinder is sleeved inside the bearing seat.

[0016] Preferably, the chassis and the bearing seat are formed separately, the stop flange and the bearing seat are integrally formed, the oil separation cylinder includes a cylinder body and a top cover provided at the top opening of the cylinder body, and the stop step is integrally formed with the cylinder body.

[0017] Preferably, the chassis and the bearing seat are integrally formed, the stop flange and the bearing seat are formed separately, and the stop step and the oil separation cylinder are formed separately.

[0018] Preferably, the lower edge of at least one through hole is lower than or flush with the step surface of the stop step.

[0019] Preferably, the base includes a chassis and fixing columns arranged on the chassis. A first annular protrusion is arranged on the chassis. A top cover is installed at the top of the fixing columns. A second annular protrusion protruding towards the first annular protrusion is arranged on the top cover. The first end of the oil separation cylinder is sleeved outside the first annular protrusion, the second end of the oil separation cylinder is sleeved outside the second annular protrusion, and the oil separation cylinder is axially limited between the top cover and the chassis.

[0020] Preferably, an annular limiting protrusion extending inwards in the radial direction is arranged at the top of the oil separation cylinder. A bearing chamber is formed between the oil separation cylinder, the annular limiting protrusion and the top cover, and a thrust bearing is installed in the bearing chamber.

[0021] According to another aspect of the present application, a compressor is provided, including an exhaust oil separation structure, and the exhaust oil separation structure is the above-mentioned exhaust oil separation structure.

[0022] Preferably, the compressor includes a stationary scroll, a first exhaust port is arranged on the stationary scroll, the exhaust oil separation structure is arranged at the first exhaust port, and the inner cavity of the oil separation cylinder is communicated with the first exhaust port.

[0023] Preferably, the compressor further includes a muffler, the muffler covers the exhaust oil separation structure and is installed on the stationary scroll, and a second exhaust port is arranged on the muffler.

[0024] Preferably, a plurality of protrusion parts are arranged on the inner wall of the muffler.

[0025] Preferably, the compressor further includes a moving scroll, a stationary disk oil groove is arranged on the stationary scroll, and the stationary disk oil groove is located between the muffler and the exhaust oil separation structure.

[0026] Preferably, a first oil return channel is arranged on the stationary scroll, and the stationary disk oil groove is communicated to the substrate end face of the moving scroll through the first oil return channel.

[0027] Preferably, a throttling mechanism is arranged in the first oil return channel.

[0028] Preferably, the compressor further includes an upper support mechanism, the moving scroll is installed on the upper support mechanism, a second oil return channel is arranged on the stationary scroll and the upper support mechanism, a support mechanism oil return channel is further arranged on the upper support mechanism, and the stationary disk oil groove is communicated with the support mechanism oil return channel through the second oil return channel.

[0029] According to another aspect of the present application, an air conditioner is provided, including a compressor, and the compressor is the above-mentioned compressor.

[0030] The exhaust oil separator structure provided by the present application includes a base and an oil separator cylinder. The oil separator cylinder is rotatably mounted on the base and can form an axial limit relative to the base. The top of the oil separator cylinder is sealed, and through holes are provided on the side wall of the oil separator cylinder. An acute angle θ is formed between the extending direction of the through holes and a first plane, and the first plane is a vertical plane passing through the center of the outer opening of the through hole and the central axis of the oil separator cylinder at the same time. The exhaust oil separator structure of the present application is arranged at the exhaust port of the pump body structure inside the compressor, and can use the gas discharged from the pump body structure to lift the oil separator cylinder of the exhaust oil separator structure and make the oil separator cylinder rotate. The rotating force of the oil separator cylinder is used to divide the discharged gas into several swirling airflows, and the centrifugal force generated by the rotation is used to effectively separate the oil mixed in the discharged gas, thereby improving the oil-gas separation efficiency and separation effect. Since the exhaust oil separator structure is arranged inside the compressor, the internal space of the compressor can be effectively utilized to realize oil-gas separation and reduce the volume of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a sectional view of the compressor according to an embodiment of the present application;

[0032] Figure 2 is a three-dimensional structure diagram of the exhaust oil separator structure according to an embodiment of the present application;

[0033] Figure 3 is a sectional view of the exhaust oil separator structure according to an embodiment of the present application;

[0034] Figure 4 is a sectional view of the exhaust oil separator structure according to an embodiment of the present application;

[0035] Figure 5 is a three-dimensional structure diagram of the exhaust oil separator structure according to an embodiment of the present application;

[0036] Figure 6 is a sectional view of the exhaust oil separator structure according to an embodiment of the present application;

[0037] Figure 7 is an exploded view of the exhaust oil separator structure according to an embodiment of the present application;

[0038] Figure 8 is a sectional view of the oil separator cylinder of the exhaust oil separator structure according to an embodiment of the present application;

[0039] Figure 9 is a three-dimensional structure diagram of the silencer of the compressor according to an embodiment of the present application;

[0040] Figure 10 is a return oil structure diagram at the first oil return passage of the compressor according to an embodiment of the present application;

[0041] Figure 11The oil return structure diagram at the second oil return passage of the compressor according to the embodiment of the present application;

[0042] Figure 12 is Figure 11 the enlarged structure diagram at the L position of

[0043] The reference numerals are shown as:

[0044] 1. Suction pipe; 2. Static scroll plate; 3. Moving scroll plate; 4. Upper support mechanism; 5. Discharge pipe; 6. Stator; 7. Rotor; 8. Rotating shaft; 8a. Oil supply passage; 9. Lower support ring; 10. Lower cover; 11. Vibration damping gasket; 12. Oil pump; 13. Lower support mechanism; 14. Screw; 15. Housing; 16. Auxiliary balance weight; 17. Main balance weight; 18. Bearing; 19. Oil return sheet metal part; 20. Support mechanism oil return passage; 21. Upper support mechanism cover plate; 22. Cross slip ring; 23. Sealing ring; 24. First oil return passage; 24a. Sealing cover; 24b. First communication hole; 24c. Throttling mechanism; 25. Second oil return passage; 25a. Second communication hole; 26. Static plate oil groove; 27. Silencer; 27a. Second exhaust port; 27b. Protrusion; 28. Exhaust oil separation structure; 281. Base; 281a. Oil guide groove; 281b. Bearing seat; 282. Oil separation cylinder; 282a. Through hole; 282b. Top cover; 282c. Cylinder body; 283. Thrust bearing; 284. Stop flange; 285. Stop step; 286. Fixed column; 287. First annular protrusion; 288. Second annular protrusion; 289. Annular limit protrusion; 29. Upper cover; 30. First exhaust port. Detailed implementation mode

[0045] With reference to Figures 1 to 12 As shown, according to the embodiment of the present application, the exhaust oil separation structure includes a base 281 and an oil separation cylinder 282. The oil separation cylinder 282 is rotatably installed on the base 281 and can form an axial limit relative to the base 281. The top of the oil separation cylinder 282 is sealed. A through hole 282a is provided on the side wall of the oil separation cylinder 282. An acute angle θ is formed between the extending direction of the through hole 282a and the first plane. The first plane is a vertical plane passing through the center of the outer opening of the through hole 282a and the central axis of the oil separation cylinder 282.

[0046] The exhaust oil separation structure of the present application is arranged at the exhaust port of the pump body structure inside the compressor. It can use the gas discharged from the pump body structure to lift the oil separation cylinder 282 of the exhaust oil separation structure and make the oil separation cylinder 282 rotate. The rotating force of the oil separation cylinder 282 is used to discharge the gas from the through hole 282a. The discharged gas is divided into several swirling airflows. By using the centrifugal force generated by rotation, the oil mixed in the discharged gas is effectively separated, thereby improving the oil-gas separation efficiency and separation effect. Since this exhaust oil separation structure is arranged inside the compressor, the internal space of the compressor can be effectively utilized to achieve oil-gas separation and reduce the volume of the compressor.

[0047] In one embodiment, the height of the through hole 282a decreases along the direction close to the central axis of the oil separation cylinder 282. An acute angle β is formed between the extending direction of the through hole 282a and the second plane, and the second plane is a horizontal plane perpendicular to the central axis of the oil separation cylinder 282.

[0048] After the refrigerant is discharged from the pump body into the oil separation cylinder 282 through the pump body structure, since the top of the oil separation cylinder 282 is sealed and the through hole 282a is inclined downward in the direction from outside to inside, the discharged gas exerts an axially upward force on the oil separation cylinder 282, lifting the oil separation cylinder 282 and making the oil separation cylinder 282 float slightly axially on the base 281. Since the through hole 282a is also opened at a certain inclination angle in the circumferential direction, the gas will exert a tangential force on the oil separation cylinder 282, pushing the oil separation cylinder 282 to rotate around the central axis. Thus, the refrigerant discharged from the pump body structure through the exhaust oil separation structure is divided into several swirling airflows, so as to achieve the purpose of separating oil. Moreover, the faster the compressor speed, the faster the discharged gas speed, the faster the rotation speed of the oil separation cylinder 282, and the more oil is separated.

[0049] The included angle θ between the extending direction of the through hole 282a and the first plane satisfies 0° < θ < 90°. It can push the oil separation cylinder 282 to rotate clockwise or counterclockwise. The difference is that the opening direction of the through hole 282a is different when the rotation direction of the oil separation cylinder 282 is different.

[0050] In one embodiment, 30° ≤ θ ≤ 60°. When the θ angle is too large and close to 90°, the tangential force exerted by the discharged gas on the oil separation cylinder 282 is small, and the oil separation effect is not good. When the θ angle is very small and close to 0°, it is not easy to process the oil separation cylinder 282, and there will be a problem of large exhaust resistance, reducing the efficiency of the compressor. Therefore, in order to ensure the oil separation effect and the exhaust efficiency of the compressor, the effect is best when the included angle θ satisfies 30° ≤ θ ≤ 60°.

[0051] In one embodiment, 15° ≤ β ≤ 45°. For the angle β between the through hole 282a and the horizontal plane, when the β angle is too large and close to 90°, it is not conducive to machining and the axial force exerted by the discharged gas on the sleeve is too large, resulting in too large an axial force on the thrust bearing, which will reduce the reliability of the thrust bearing and increase the power consumption of the compressor; when the β angle is very small and close to 0°, the oil separator cylinder 282 may not float up and will rub against the base 281. Since the mass of the oil separator cylinder 282 is small, only a very small axial force is required to float up the oil separator cylinder 282, and the best effect is achieved when the opening angle satisfies 15° ≤ β ≤ 45°. Setting the through hole 282a to be inclined downward along the direction from outside to inside can ensure that the gas stays in the muffler 27 for a longer time and improve the oil separation effect.

[0052] The cross-sectional shape of the above-mentioned through hole 282a can be circular, elliptical, polygonal, etc. Along the direction from inside to outside, the cross-sectional area of the through hole 282a can remain unchanged, or increase or decrease.

[0053] A oil guiding groove 281a is provided on the end surface of the base 281 at the bottom of the oil separator cylinder 282. The oil guiding groove 281a extends along the radial direction of the oil separator cylinder 282. When the oil separated during the rotation of the oil separator cylinder 282 adheres to the base 281, it will flow into the oil guiding groove 281a, and thus flow to the target position under the guiding action of the oil guiding groove 281a, facilitating the collection of the separated oil.

[0054] In this embodiment, the cross-section of the oil guiding groove 281a is V-shaped, or can also be U-shaped, or other concave shapes, so as to facilitate the oil to converge into the oil guiding groove 281a and be discharged by the oil guiding groove 281a.

[0055] There are multiple through holes 282a, which are evenly distributed along the circumferential direction of the oil separator cylinder 282, enabling the oil to be separated from multiple positions in the circumferential direction of the oil separator cylinder 281a and improving the oil-gas separation efficiency.

[0056] In one embodiment, there are multiple through holes 282a. The multiple through holes 282a are divided into at least two groups arranged axially. The multiple through holes 282a in the same group are evenly distributed along the circumferential direction of the oil separator cylinder 282, capable of forming a multi-layer separation structure, further improving the oil-gas separation effect and separation efficiency.

[0057] In one embodiment, the base 281 includes a chassis and a bearing housing 281b mounted on the chassis. A stop flange 284 is provided at the end of the bearing housing 281b away from the chassis, and a stop step 285 is provided at the bottom of the oil separator cylinder 282. The stop flange 284 axially limits the stop step 285. In this embodiment, the stop flange 284 is provided on the upper side of the stop step 285, so as to limit the upward axial movement of the oil separator cylinder 282 and prevent the oil separator cylinder 282 from disengaging from the base 281. An axial gap is formed between the stop step 285 of the oil separator cylinder 282 and the stop flange 284, so that the oil separator cylinder 282 can axially move a certain distance relative to the base 281, so that the oil separator cylinder 282 can float upward a certain distance under the action of the discharged gas, forming a clearance fit with the base 281, reducing the friction between the oil separator cylinder 282 and the base 281, improving the rotation efficiency of the oil separator cylinder 282, and reducing rotational wear.

[0058] In one embodiment, a bearing chamber is formed between the stop step 285 and the stop flange 284, and a thrust bearing 283 is arranged in the bearing chamber. In this embodiment, by arranging the thrust bearing 283, the upward axial movement of the oil separator cylinder 282 can be restricted, and at the same time, it can prevent the oil separator cylinder 282 and the base 281 from colliding when the compressor starts, stops or runs at variable speed, reduce noise, and further reduce the wear between the oil separator cylinder 282 and the base 281, and extend the service life of the oil separator cylinder 282.

[0059] The oil separator cylinder 282 can be sleeved outside the bearing housing 281b, or the oil separator cylinder 282 can be sleeved inside the bearing housing 281b, as long as the rotational fit and axial limit between the oil separator cylinder 282 and the bearing housing 281 can be achieved.

[0060] In one embodiment, the chassis and the bearing housing 281b are separately formed, the stop flange 284 and the bearing housing 281b are integrally formed, the oil separator cylinder 282 includes a cylinder body 282c and a top cover 282b provided at the top opening of the cylinder body 282c, and the stop step 285 and the cylinder body 282c are integrally formed. During installation, the cylinder body 282c of the oil separator cylinder 282 can be first installed on the chassis, then the thrust bearing 283 is installed on the stop step 285 of the oil separator cylinder 282, and then the bearing housing 281b is installed on the chassis by pressing, welding or screwing, etc., so that the stop flange 284 of the bearing housing 281 stops above the thrust bearing 283, and the top cover 282 is fixedly installed on the top of the cylinder body 282c of the oil separator cylinder 282 by pressing, welding or screwing, etc., and the assembly of the exhaust oil separator structure can be completed.

[0061] In one embodiment, the chassis is integrally formed with the bearing seat 281b, the stop flange 284 is separately formed from the bearing seat 281b, and the stop step 285 is separately formed from the oil separator cylinder 282. In this embodiment, during installation, first install the stop step 285 outside the bearing seat 281b, then install the thrust bearing 283 on the stop step 285, install the stop flange 284 on the bearing seat 281b by means of press-fitting, welding or screw connection, etc., and finally install the cylinder body 282c and the top cover 282b of the oil separator cylinder 282 together on the stop step 285 by means of press-fitting, welding or screw connection, etc. to complete the assembly of the exhaust oil separation structure.

[0062] In one embodiment, the lower edge of at least one through hole 282a is lower than or flush with the step surface of the stop step 285, so as to ensure that no oil accumulates in the oil separator cylinder 282 and improve the oil utilization efficiency.

[0063] In one embodiment, the base 281 includes a chassis and fixing columns 286 provided on the chassis. A first annular protrusion 287 is provided on the chassis. The top of the fixing column 286 is installed with a top cover 282b. A second annular protrusion 288 protruding toward the first annular protrusion 287 is provided on the top cover 282b. The first end of the oil separator cylinder 282 is sleeved outside the first annular protrusion 287, and the second end of the oil separator cylinder 282 is sleeved outside the second annular protrusion 288. The oil separator cylinder 282 is axially limited between the top cover 282b and the chassis. In this embodiment, two or more fixing columns 286 are provided on the base 281. The top cover 282b is connected to the fixing columns 286. The oil separator cylinder 282 is arranged between the chassis and the top cover 282b. The degrees of freedom of the upper and lower ends of the oil separator cylinder 282 are both restricted, and there is only axial movement and circumferential rotation, thereby enhancing the stability of the oil separator cylinder 282, preventing the oil separator cylinder 282 from being eccentrically worn and jammed during rotation, and improving the reliability of the exhaust oil separation structure.

[0064] In this embodiment, an annular limiting protrusion 289 extending radially inward is provided at the top of the oil separator cylinder 282. A bearing chamber is formed between the oil separator cylinder 282, the annular limiting protrusion 289 and the top cover 282b. A thrust bearing 283 is installed in the bearing chamber, so as to form an axial buffer by means of the thrust bearing 283 and reduce the rotational wear of the oil separator cylinder 282.

[0065] Refer to Figures 1 to 12 As shown, according to an embodiment of the present application, the compressor includes an exhaust oil separation structure 28, and the exhaust oil separation structure 28 is the above-mentioned exhaust oil separation structure.

[0066] The compressor has a housing 15, an upper cover 29 and a lower cover 10 that form a sealed container. An intake pipe 1 for sucking refrigerant is provided on the upper cover 29, and a discharge pipe 5 for discharging refrigerant is provided on the housing 15. Usually, an oil storage space is formed at the bottom of the sealed container to store part of the lubricating oil, which is pumped to the upper space of the housing 15 by an oil pump 12 to lubricate, cool and seal the interior of the compressor.

[0067] A pump body structure is provided in the upper part of the housing 15. The pump body structure includes a stationary scroll 2, a rotating scroll 3 and a cross slip ring 22. The pump body structure is installed on an upper support mechanism 4. The upper support mechanism 4 is cooperated with the housing 15 by welding and fixed inside the housing 15. The upper support mechanism is provided with a support mechanism oil return passage 20 to recycle the excess lubricating oil in the oil pool of the upper support mechanism to the bottom oil pool through an oil return sheet metal part 19. The rotating shaft 8 has a through oil supply passage 8a inside. The upper end of the rotating shaft 8 has an eccentric part that passes through the upper support mechanism 4 and cooperates with the rotating scroll 3. A rotor 7 is sleeved in the middle part. A main balance weight 17 and a sub-balance weight 16 are provided on the rotor 7 to balance the centrifugal force during the operation of the compressor. A stator 6 is provided outside the rotor 7 to drive the rotating shaft 8 to rotate. The lower end of the rotating shaft 8 is inserted into a lower support mechanism 13 for fixation, and an oil pump 12 is provided at the lower end to suck lubricating oil in the lower oil storage space.

[0068] A lower support ring 9 is provided inside the compressor for installing the lower support mechanism 13. The lower support mechanism 13 is fixedly provided on the lower support ring 9 by screws 14. A vibration damping washer 11 is provided at the bottom of the housing 15 of the compressor, which can damp the vibration of the compressor and reduce the vibration noise of the compressor. The rotating shaft 8 and the upper support mechanism 4 are cooperated through a bearing 18, thereby reducing the rotational wear between the rotating shaft 8 and the upper support mechanism 4. An upper support mechanism cover plate 21 is provided between the upper support mechanism 4 and the rotating scroll 3. A sealing ring 23 is provided on the mating end surface of the rotating scroll 3 and the stationary scroll 2, which can effectively improve the sealing performance during the rotational mating process of the rotating scroll 3 and the stationary scroll 2.

[0069] A first exhaust port 30 is provided on the stationary scroll 2. An exhaust oil separator structure 28 is provided at the first exhaust port 30. The inner cavity of the oil separator cylinder 282 is communicated with the first exhaust port 30. After the compressed gas is discharged from the first exhaust port 30, it enters the oil separator cylinder 282 and is discharged from the through hole 282a of the oil separator cylinder 282. Under the action of the compressed gas, the oil separator cylinder 282 floats upward and starts to rotate at the same time. The gas is thrown out by centrifugal action, and the oil and gas in the discharged gas are separated during the throwing process.

[0070] The compressor further includes a muffler 27, which covers the exhaust oil separation structure 28 and is installed on the stationary scroll 2. A second exhaust port 27a is provided on the muffler 27. The muffler 27 can reduce the noise of the gas discharged from the exhaust oil separation structure 28 and lower the exhaust noise of the compressor. The gas after oil-gas separation enters the shell 15 of the compressor from the second exhaust port 27a and then is discharged from the compressor through the discharge pipe 5. The muffler 27 is fastened to the end plate surface of the stationary scroll 2 by screws, covering the exhaust oil separation structure 28 inside to reduce noise.

[0071] A stationary disk oil groove 26 is provided on the stationary scroll 2, and the stationary disk oil groove 26 is located between the muffler 27 and the exhaust oil separation structure 28.

[0072] A plurality of protrusions 27b are provided on the inner wall of the muffler 27, which can further reduce the noise of the compressor and can smoothly guide the oil adhering to the inner wall of the muffler 27 into the stationary disk oil groove 26.

[0073] A first oil return passage 24 is provided on the stationary scroll 2, and the stationary disk oil groove 26 is connected to the substrate end face of the orbiting scroll 3 through the first oil return passage 24. The first oil return passage 24 is connected to the stationary disk oil groove 26 through a first communication hole 24b, which facilitates the stationary disk oil groove 26 to discharge the oil into the first oil return passage 24.

[0074] A throttling mechanism 24c is provided in the first oil return passage 24, and a sealing cover 24a is provided at the port of the first oil return passage 24 where the throttling mechanism 24c is located for sealing the port of the first oil return passage 24. The sealing cover 24a is detachably installed at the port of the first oil return passage 24, which can facilitate the installation of the throttling mechanism 24c into the first oil return passage 24 or the removal from the first oil return passage 24.

[0075] One end of the first oil return passage 24 is connected to the stationary disk oil groove 26, and the other end is connected to the substrate end face and the back pressure space of the orbiting scroll 3. The oil separated from the back of the stationary scroll 2 is throttled and decompressed by the throttling mechanism 24c and then guided to the back pressure space to lubricate and seal the substrate end face of the orbiting scroll 3.

[0076] The compressor further includes an upper support mechanism 4, the orbiting scroll 3 is installed on the upper support mechanism 4, a second oil return passage 25 is provided on the stationary scroll 2 and the upper support mechanism 4, and a support mechanism oil return passage 20 is also provided on the upper support mechanism 4. The stationary disk oil groove 26 is connected to the support mechanism oil return passage 20 through the second oil return passage 25.

[0077] One end of the second oil return passage 25 is connected to the stationary disk oil groove 26, and the other end passes through the upper support mechanism 4 and is connected to the support mechanism oil return passage 20, guiding a part of the separated oil to the bottom oil sump of the compressor.

[0078] Through the provision of the first oil return passage 24 and the second oil return passage 25, effective lubrication can be achieved for the substrate end face of the moving scroll 3, while ensuring that the oil flows back to the oil sump at the bottom of the compressor in a timely manner. Therefore, the oil return efficiency can be improved, and the operation reliability of the compressor can be enhanced.

[0079] According to an embodiment of the present application, the air conditioner includes a compressor, and the compressor is the compressor described above.

[0080] It is easily understood by those skilled in the art that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0081] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present application, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. An exhaust oil separator structure, characterized in that, It includes a base (281) and an oil separator cylinder (282). The oil separator cylinder (282) is rotatably mounted on the base (281) and can form an axial limit relative to the base (281). The top of the oil separator cylinder (282) is sealed. A through hole (282a) is provided on the side wall of the oil separator cylinder (282). An acute angle θ is formed between the extending direction of the through hole (282a) and a first plane. The first plane is a vertical plane that simultaneously passes through the center of the outer opening of the through hole (282a) and the central axis of the oil separator cylinder (282).

2. The exhaust oil separator structure according to claim 1, wherein A oil guiding groove (281a) is provided on the end face of the base (281) at the bottom of the oil separator cylinder (282). The oil guiding groove (281a) extends along the radial direction of the oil separator cylinder (282).

3. The exhaust oil separator structure according to claim 1, characterized in that, There are multiple through holes (282a), which are evenly distributed along the circumferential direction of the oil separator cylinder (282).

4. The exhaust oil separator structure according to claim 1, wherein There are multiple through holes (282a). The multiple through holes (282a) are divided into at least two groups arranged axially. The multiple through holes (282a) in the same group are evenly distributed along the circumferential direction of the oil separator cylinder (282).

5. The exhaust oil separator structure according to claim 1, characterized in that 30° ≤ θ ≤ 60°.

6. The exhaust oil separator structure according to claim 1, characterized in that The through hole (282a) decreases in height along the direction close to the central axis of the oil separator cylinder (282). An acute angle β is formed between the extending direction of the through hole (282a) and a second plane. The second plane is a horizontal plane perpendicular to the central axis of the oil separator cylinder (282).

7. The exhaust oil separator structure according to claim 6, characterized in that, 15°≤β≤45°。 8. The exhaust oil separator structure according to any one of claims 1 to 7, characterized in that, The base (281) includes a chassis and a bearing seat (281b) mounted on the chassis. A stop flange (284) is provided at the end of the bearing seat (281b) away from the chassis. A stop step (285) is provided at the bottom of the oil separator cylinder (282). The stop flange (284) forms an axial limit for the stop step (285).

9. The exhaust oil separator structure according to claim 8, characterized in that, A bearing chamber is formed between the stop step (285) and the stop flange (284), and a thrust bearing (283) is provided in the bearing chamber.

10. The exhaust oil separator structure according to claim 8, wherein The oil separator cylinder (282) is sleeved outside the bearing seat (281b), or the oil separator cylinder (282) is sleeved inside the bearing seat (281b).

11. The exhaust oil separator structure according to claim 8, wherein, The chassis and the bearing seat (281b) are separately formed. The stop flange (284) and the bearing seat (281b) are integrally formed. The oil separator cylinder (282) includes a cylinder body (282c) and a top cover (282b) provided at the top opening of the cylinder body (282c). The stop step (285) and the cylinder body (282c) are integrally formed.

12. The exhaust oil separator structure according to claim 8, characterized in that, The chassis and the bearing seat (281b) are integrally formed. The stop flange (284) and the bearing seat (281b) are separately formed. The stop step (285) and the oil separator cylinder (282) are separately formed.

13. The exhaust oil separator structure according to claim 8, wherein, The lower edge of at least one through hole (282a) is lower than the step surface of the stop step (285) or flush with the step surface.

14. The exhaust oil separator structure according to any one of claims 1 to 7, characterized in that, The base (281) includes a chassis and fixing columns (286) arranged on the chassis. A first annular protrusion (287) is arranged on the chassis. A top cover (282b) is mounted on the top of the fixing column (286). A second annular protrusion (288) protruding towards the first annular protrusion (287) is arranged on the top cover (282b). The first end of the oil separation cylinder (282) is sleeved outside the first annular protrusion (287), and the second end of the oil separation cylinder (282) is sleeved outside the second annular protrusion (288). The oil separation cylinder (282) is axially limited between the top cover (282b) and the chassis.

15. The exhaust oil separator structure according to claim 14, wherein, An annular limiting protrusion (289) extending inwards in the radial direction is arranged on the top of the oil separation cylinder (282). A bearing chamber is formed among the oil separation cylinder (282), the annular limiting protrusion (289) and the top cover (282b). A thrust bearing (283) is installed in the bearing chamber.

16. A compressor, comprising an exhaust oil separation structure (28), characterized in that, The exhaust oil separation structure (28) is the exhaust oil separation structure (28) according to any one of claims 1 to 15.

17. The compressor according to claim 16, wherein, The compressor includes a stationary scroll (2). A first exhaust port (30) is arranged on the stationary scroll (2). The exhaust oil separation structure (28) is arranged at the first exhaust port (30). The inner cavity of the oil separation cylinder (282) is communicated with the first exhaust port (30).

18. The compressor according to claim 17, characterized in that, The compressor further includes a muffler (27). The muffler (27) covers the exhaust oil separation structure (28) and is installed on the stationary scroll (2). A second exhaust port (27a) is arranged on the muffler (27).

19. The compressor according to claim 18, characterized in that, A plurality of protruding parts (27b) are arranged on the inner wall of the muffler (27).

20. The compressor according to claim 18, characterized in that, The compressor further includes a moving scroll (3). A stationary scroll oil groove (26) is arranged on the stationary scroll (2). The stationary scroll oil groove (26) is located between the muffler (27) and the exhaust oil separation structure (28).

21. The compressor according to claim 20, characterized in that, A first oil return channel (24) is arranged on the stationary scroll (2). The stationary scroll oil groove (26) is communicated to the substrate end face of the moving scroll (3) through the first oil return channel (24).

22. The compressor according to claim 21, characterized in that, A throttling mechanism (24c) is arranged in the first oil return channel (24).

23. The compressor according to claim 20, characterized in that, The compressor further includes an upper support mechanism (4). The moving scroll (3) is installed on the upper support mechanism (4). A second oil return channel (25) is arranged on the stationary scroll (2) and the upper support mechanism (4). A support mechanism oil return channel (20) is further arranged on the upper support mechanism (4). The stationary scroll oil groove (26) is communicated with the support mechanism oil return channel (20) through the second oil return channel (25).

24. An air conditioner, comprising a compressor, characterized in that, The compressor is the compressor according to any one of claims 16 to 23.

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