Compressor and air conditioner

Abstract

The present invention relates to a compressor and an air conditioner. The compressor includes: a shell, which is formed with a cavity; a rotating shaft, which is arranged in the cavity; a fixing part, which is arranged in the cavity and fixedly connected to the shell; and a bearing, which is arranged on the rotating shaft and fixedly connected to the fixing part; the fixing part is provided with a liquid inlet channel, and the liquid inlet channel is used to pass a refrigerant to cool the bearing. The present invention introduces the refrigerant outside the shell through the liquid inlet channel, and cools the bearing by the flow of the refrigerant, which can take away the heat on the bearing in time, cool the bearing evenly and sufficiently, ensure the reliability of the compressor operation, solve the problem of excessive bearing temperature during the operation of the compressor, ensure that the bearing in the compressor is fully cooled, and the compressor operates efficiently and reliably.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a compressor and an air conditioner. Background Art

[0002] Whether it is a sliding bearing or a gas bearing, the bearing will generate heat during the operation of any machine and needs to be lubricated and cooled. Generally speaking, most bearings in the industrial field are cooled by lubricating oil, which takes away the heat generated by the high-speed rotation of the shaft relative to the bearing. For centrifugal compressors, large cooling capacity, heavy load and low speed models generally use sliding bearings, while small cooling capacity, light load and high speed models generally use gas bearings. In comparison, the heat generated by gas bearings is lower than that of sliding bearings.

[0003] For centrifugal compressors, refrigerant can also be used as a cooling medium under certain conditions. Since refrigerant is relatively volatile and extremely easy to gasify after absorbing heat, refrigerant cooling can be used in some light-load centrifugal compressors using gas bearings.

[0004] For the cooling of axial bearings, most of the related centrifugal compressors use the flow of lubricating oil for cooling. This method mainly forms a certain oil film thickness to support the shaft after the lubricating oil enters the gap between the bearing shaft through the oil path, and absorbs the heat generated by friction at the same time. The oil discharged from the oil drain port takes away the generated heat; for dynamic pressure gas bearings, since there is no need for separate gas supply, the gas source is relatively poor in the surrounding environment, and the gas fluidity is relatively poor. The generated heat can only be dissipated by heat transfer between the environment and the metal. This cooling will result in insufficient internal cooling, untimely heat flow, temperature concentration inside the axial bearing, and cannot achieve a good cooling effect. When the temperature is too high, it will cause the bearing to burn and the thrust surface to deform. Summary of the invention

[0005] One of the objectives of the present invention is to provide a compressor and an air conditioner for alleviating the problem of high bearing temperature.

[0006] Some embodiments of the present invention provide a compressor comprising:

[0007] a housing, forming a cavity;

[0008] A rotating shaft is disposed in the cavity;

[0009] a fixing member, disposed in the cavity and fixedly connected to the housing; and

[0010] A bearing, disposed on the rotating shaft and fixedly connected to the fixing member;

[0011] Wherein, the fixing member is provided with a liquid inlet channel, and the liquid inlet channel is used to introduce a refrigerant to cool the bearing.

[0012] In some embodiments, the compressor includes a liquid storage chamber, which is disposed on the shell and is communicated with the liquid inlet channel.

[0013] In some embodiments, the liquid storage chamber is disposed at an upper portion of the shell.

[0014] In some embodiments, the fixing member includes a fixing plate, the fixing plate is provided with a first through hole for the rotating shaft to pass through, the first side of the fixing plate is fixedly connected to the bearing, the fixing plate is provided with an annular groove or a first annular cavity around the first through hole, and the liquid inlet channel is connected to the annular groove or the first annular cavity.

[0015] In some embodiments, the fixing member includes a support, which is fixedly connected to the second side of the fixing plate, and the liquid inlet channel is arranged on the support. The support is also provided with a liquid outlet channel, and the liquid outlet channel is connected to the annular groove or the first annular cavity.

[0016] In some embodiments, the support is provided with a second through hole for the rotating shaft to pass through, the liquid inlet channel is provided above the second through hole and close to the outer edge of the support, and the liquid outlet channel is provided below the second through hole and close to the second through hole.

[0017] In some embodiments, the fixing plate includes a first fixing plate, and the annular groove is disposed on a second side of the first fixing plate.

[0018] In some embodiments, the fixing member includes a support, the support is fixedly connected to the second side of the first fixing plate, and the annular groove cooperates with the support to form a second annular cavity.

[0019] In some embodiments, a first inlet is provided on the second side of the first fixing plate, the first inlet is provided above the first through hole and located at the outer edge of the annular groove, the first inlet connects the liquid inlet channel and the annular groove, and the fixing member is further provided with a liquid outlet channel, and the liquid outlet channel is connected to the annular groove.

[0020] In some embodiments, the annular groove includes a first annular groove and a second annular groove, the first annular groove is located at the outer periphery of the second annular groove, and the first annular groove is connected to the second annular groove.

[0021] In some embodiments, a first inlet is provided on the second side of the first fixing plate, the first inlet is connected to the liquid inlet channel and the first annular groove, and the fixing member is further provided with a liquid outlet channel, the liquid outlet channel is connected to the second annular groove.

[0022] In some embodiments, the fixing plate includes a second fixing plate, and the first annular cavity is disposed between a first side and a second side of the second fixing plate.

[0023] In some embodiments, a second inlet and an outlet are provided on the second side of the second fixing plate, the second inlet is provided above the first through hole and located at the outer edge of the first annular cavity, and the outlet is provided below the first through hole and close to the first through hole;

[0024] The second inlet is connected to the first annular cavity and the liquid inlet channel, the fixing member is further provided with a liquid outlet channel, and the outlet is connected to the first annular cavity and the liquid outlet channel.

[0025] In some embodiments, the bearing comprises a gas bearing.

[0026] In some embodiments, the bearing comprises an axial bearing.

[0027] In some embodiments, the compressor also includes a thrust plate and a diffuser, and the bearing includes a first bearing and a second bearing, the first bearing is arranged between the thrust plate and the fixing member, and the first bearing is fixedly connected to the fixing member; the second bearing is arranged between the thrust plate and the diffuser, and the second bearing is fixedly connected to the diffuser.

[0028] In some embodiments, the compressor further includes a motor, the motor is disposed in the cavity, the area where the motor is installed is a motor cavity, and the fixing member is further provided with a liquid outlet channel, the liquid outlet channel is connected to the motor cavity.

[0029] Some embodiments of the present invention provide an air conditioner comprising the above-mentioned compressor.

[0030] In some embodiments, the air conditioner includes a condenser, and the condenser is in communication with the liquid inlet passage.

[0031] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0032] In some embodiments, a liquid inlet channel is provided on the fixing part, and the liquid inlet channel introduces the refrigerant from the outside of the shell, and cools the bearings through the flow of the refrigerant, which can take away the heat on the bearings in time, cool the bearings evenly and sufficiently, ensure the reliability of the compressor operation, solve the problem of excessive bearing temperature during the operation of the compressor, ensure that the bearings in the compressor are fully cooled, and the compressor operates efficiently and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 A partial cross-sectional schematic diagram of a compressor provided in some embodiments of the present invention;

[0035] Figure 2 A schematic diagram of a first fixing plate provided for some embodiments of the present invention;

[0036] Figure 3 Schematic diagrams of a first fixing plate provided for other embodiments of the present invention;

[0037] Figure 4 Schematic diagram of a second fixing plate provided for some embodiments of the present invention.

[0038] Description of the reference numerals in the accompanying drawings:

[0039] 1-housing; 11-liquid storage chamber; 12-motor chamber;

[0040] 2- Rotating shaft;

[0041] 3-fixing member; 31-fixing plate; 311-first fixing plate; 312-second fixing plate; 32-support; 321-liquid inlet channel; 322-liquid outlet channel; 33-annular groove; 331-first annular groove; 332-second annular groove; 34-first through hole; 35-first inlet; 36-second inlet; 37-outlet;

[0042] 4-bearing; 41-first bearing; 42-second bearing;

[0043] 5-Thrust plate;

[0044] 6- Diffuser. DETAILED DESCRIPTION

[0045] The technical scheme in the embodiment will be described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships 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 should not be understood as limiting the scope of protection of the present invention.

[0047] like Figure 1 As shown, some embodiments provide a compressor, which includes a housing 1, a rotating shaft 2, a fixing member 3 and a bearing 4.

[0048] The housing 1 is formed with a cavity. The rotating shaft 2 is rotatably disposed in the cavity. The fixing member 3 is disposed in the cavity and fixedly connected to the inner wall of the housing 1 .

[0049] The bearing 4 is disposed on the rotating shaft 2 and fixedly connected to the fixing member 3 . The rotating shaft 2 can rotate relative to the bearing 4 .

[0050] The fixing member 3 is provided with a liquid inlet channel 321 , and the liquid inlet channel 321 is used to introduce a refrigerant to cool the bearing 4 .

[0051] The refrigerant outside the shell 1 is introduced through the liquid inlet channel 321, and the bearing 4 is cooled by the flow of the refrigerant, which can take away the heat on the bearing 4 in time, cool the bearing 4 evenly and fully, ensure the reliability of the compressor operation, solve the problem of excessive bearing temperature during the operation of the compressor, and avoid bearing damage caused by long-term operation of the compressor in a high temperature environment.

[0052] In some embodiments, the compressor includes a liquid storage chamber 11 , which is disposed on the housing 1 , and the liquid storage chamber 11 is communicated with the liquid inlet channel 321 .

[0053] The liquid storage chamber 11 is a cavity structure with a certain volume, which is connected to the refrigerant outside the shell 1 and the liquid inlet channel 321, that is, the liquid storage chamber 11 indirectly connects the inside and outside of the compressor.

[0054] The main function of the liquid storage chamber 11 is to store refrigerant. When the amount of refrigerant in the liquid storage chamber 11 is large, the gravity is large and the refrigerant flow rate is fast. When the amount of refrigerant in the liquid storage chamber 11 is small, the refrigerant flow rate is slow.

[0055] The liquid storage chamber 11 can also buffer the refrigerant flowing into the outside of the shell 1. On the one hand, it prevents the refrigerant from directly impacting the bearing 4 and causing vibration of the bearing 4. On the other hand, it realizes stable liquid supply for bearing cooling and avoids fluctuations in the bearing refrigerant flow due to external changes or fluctuations in the circulation system.

[0056] In some embodiments, the housing 1 is integrally cast to form a liquid storage chamber 11. A flow channel connected to the liquid inlet channel 321 is processed on the housing. The liquid storage chamber 11 mainly serves to store refrigerant, and realizes adaptive adjustment of the amount of refrigerant required for cooling the bearing.

[0057] In some embodiments, the liquid storage chamber 11 is disposed at the upper portion of the housing 1 (the upper portion of the housing 1 when the compressor is in normal working condition). The refrigerant can further flow out by gravity, which is more conducive to the refrigerant in the liquid storage chamber 11 flowing to the liquid inlet channel 321, thereby improving the cooling efficiency.

[0058] In some embodiments, the fixing member 3 includes a fixing plate 31 , which is provided with a first through hole 34 for the rotating shaft 2 to pass through, and a first side of the fixing plate 31 is fixedly connected to the bearing 4 . The main function of the fixing plate 31 is to fix the bearing 4 .

[0059] The fixing plate 31 is provided with an annular groove 33 or a first annular cavity around the first through hole 34 , and the liquid inlet channel 321 is communicated with the annular groove 33 or the first annular cavity.

[0060] In some embodiments, the fixing member 3 includes a support 32, which is fixedly connected to the second side of the fixing plate 31, and a liquid inlet channel 321 is provided on the support 32. The support 32 is also provided with a liquid outlet channel 322, and the liquid outlet channel 322 is connected to the annular groove 33 or the first annular cavity.

[0061] The refrigerant flows in from the liquid inlet channel 321 to cool the bearing 4 , and the refrigerant after heat exchange flows out through the liquid outlet channel 322 .

[0062] In some embodiments, the support 32 is provided with a second through hole for the rotating shaft 2 to pass through, the liquid inlet channel 321 is provided above the second through hole and close to the outer edge of the support 32, and the liquid outlet channel 322 is provided below the second through hole and close to the second through hole.

[0063] In some embodiments, Figure 2 As shown, the fixing plate 31 includes a first fixing plate 311 , and the annular groove 33 is disposed on a second side of the first fixing plate 311 .

[0064] In some embodiments, the fixing member 3 includes a support 32 , the support 32 is fixedly connected to the second side of the first fixing plate 311 , and the annular groove 33 cooperates with the support 32 to form a second annular cavity.

[0065] In some embodiments, a first inlet 35 is provided on the second side of the first fixing plate 311, the first inlet 35 is provided above the first through hole 34 and at the outer edge of the annular groove 33, and the first inlet 35 communicates with the liquid inlet channel 321 and the annular groove 33. The fixing member 3 is also provided with a liquid outlet channel 322, and the liquid outlet channel 322 communicates with the annular groove 33.

[0066] Optionally, the liquid inlet channel 321 is arranged above the second through hole and close to the outer edge of the support 32, the first inlet 35 is opposite to the liquid inlet channel 321, and the liquid outlet channel 322 is arranged below the second through hole and close to the second through hole, so that the refrigerant can be effectively stored in the second annular cavity formed by the annular groove 33 and the support 32, thereby cooling the bearing 4 over a large area and improving the cooling effect of the bearing 4.

[0067] In some embodiments, Figure 3As shown, the annular groove 33 includes a first annular groove 331 and a second annular groove 332 . The first annular groove 331 is located at the outer periphery of the second annular groove 332 , and the first annular groove 331 is communicated with the second annular groove 332 .

[0068] In some embodiments, a first inlet 35 is provided on the second side of the first fixing plate 311 , and the first inlet 35 is connected to the liquid inlet channel 321 and the first annular groove 331 . The fixing member 3 is also provided with a liquid outlet channel 322 , and the liquid outlet channel 322 is connected to the second annular groove 332 .

[0069] Optionally, the first annular groove 331 is connected to the second annular groove 332 through a connecting port.

[0070] The first inlet 35 is not aligned with the communication opening of the first annular groove 331 and the second annular groove 332. That is, there is an angle between the first connecting line and the second connecting line; wherein the first connecting line is the connecting line between the center of the first fixing plate 311 and the first inlet 35; and the second connecting line is the connecting line between the center of the first fixing plate 311 and the communication opening on the first annular groove 331.

[0071] Of course, at least one interconnected annular groove may be provided between the first annular groove 331 and the second annular groove 332 . Each annular groove is connected through a connecting port, and two adjacent connecting ports are staggered with each other to reduce the amount of refrigerant directly entering the next-level annular groove and improve the cooling performance.

[0072] Optionally, the line connecting the first inlet 35 and the center of the first fixed plate 311 is perpendicular to the axis of the rotating shaft 2, and the line connecting the connecting port of the first annular groove connecting the next-level annular groove and the center of the first fixed plate 311 has a certain angle with the axis of the rotating shaft 2, and the angle range is about ±10°.

[0073] The depth range of the annular groove 33 on the first fixing plate 311 needs to be determined according to the thermal conductivity of the material. If it is too shallow, the heat cannot be taken away in time, and if it is too deep, there will be processing deformation.

[0074] In some embodiments, the annular groove disposed on the first fixing plate 311 further includes a spiral annular groove.

[0075] In some embodiments, Figure 4 As shown, the fixing plate 31 includes a second fixing plate 312 , and the first annular cavity is disposed between a first side and a second side of the second fixing plate 312 . In other words, the first annular cavity is disposed in the second fixing plate 312 .

[0076] In some embodiments, Figure 4As shown, a second inlet 36 and an outlet 37 are provided on the second side of the second fixing plate 312 . The second inlet 36 is provided above the first through hole 34 and at the outer edge of the first annular cavity. The outlet 37 is provided below the first through hole 34 and close to the first through hole 34 .

[0077] The second inlet 36 communicates with the first annular cavity and the liquid inlet channel 321 . The fixing member 3 is further provided with a liquid outlet channel 322 . The outlet 37 communicates with the first annular cavity and the liquid outlet channel 322 .

[0078] In some embodiments, the size of the second inlet 36 is larger than the size of the outlet 37. The second inlet 36 located at the top is used for the inflow of the refrigerant, and the outlet 37 located at the bottom is used for the outflow of the refrigerant after heat exchange. The size of the second inlet 36 is larger than the size of the outlet 37, which is conducive to filling the entire annular cavity with the refrigerant and improving the cooling effect of the bearing 4.

[0079] Optionally, the size of the second inlet 36 is 1 mm to 2 mm larger than the size of the outlet 37 .

[0080] In some embodiments, the bearing 4 comprises a gas bearing.

[0081] In some embodiments, the bearing 4 comprises an axial bearing.

[0082] The axial bearing is one of the core components of the compressor, and its main function is to axially support the high-speed rotating shaft 2.

[0083] Due to the friction loss between the bearing and the thrust surface, the shaft-bearing system generates a large amount of heat during operation. If the heat is not removed in time, it will not only cause damage to the axial bearing, but the heat will also be transferred to the thrust surface, causing deformation of the thrust surface and affecting the bearing performance.

[0084] The refrigerant flow circuit formed by the liquid inlet channel 321 and the liquid outlet channel 322 provided on the fixing member 3 provided in the embodiment of the present disclosure is used to evenly cool the bearing, accelerate the heat flow between the rotating shaft and the bearing, reduce the bearing temperature, and at the same time reduce the transfer of heat to the permanent magnet, thereby ensuring safe and reliable operation of the compressor.

[0085] In some embodiments, the compressor also includes a thrust plate 5 and a diffuser 6, and the bearing 4 includes a first bearing 41 and a second bearing 42, the first bearing 41 is arranged between the thrust plate 5 and the fixing member 3, and the first bearing 41 is fixedly connected to the fixing member 3; the second bearing 42 is arranged between the thrust plate 5 and the diffuser 6, and the second bearing 42 is fixedly connected to the diffuser 6.

[0086] The first bearing 41 and the second bearing 42 are respectively mounted at two ends of the thrust plate 5 to balance the axial force of the rotating shaft 2 running at high speed.

[0087] like Figure 1As shown, since the first bearing 41 and the second bearing 42 are disposed at the same end of the rotating shaft 2 , the liquid inlet channel 321 and the liquid outlet channel 322 are only disposed on the fixing member 3 located at one end of the rotating shaft 2 .

[0088] In some embodiments, the bearing 4 includes a first bearing 41 and a second bearing 42 , and the first bearing 41 and the second bearing 42 are disposed at both ends of the rotating shaft 2 . Therefore, a liquid inlet channel 321 and a liquid outlet channel 322 are disposed on the fixing member 3 located at both ends of the rotating shaft 2 .

[0089] In some embodiments, the compressor further includes a motor, which is disposed in the cavity. The area where the motor is installed is the motor cavity 12 . The fixing member 3 further includes a liquid outlet channel 322 , which is connected to the motor cavity 12 .

[0090] Furthermore, the space formed by the supports 32 arranged at both ends of the rotating shaft 2 and the inner wall of the shell 1 is the motor cavity 12, which is mainly used to store the refrigerant after heat exchange with the bearing and guide the refrigerant to the next link.

[0091] In some embodiments, the bearing is cooled as follows:

[0092] When cooling the bearing, the refrigerant enters the liquid storage chamber 11. At this time, the refrigerant pressure of the liquid storage chamber 11 can be adjusted by the amount of refrigerant in the chamber. The refrigerant in the liquid storage chamber 11 flows in through the liquid inlet channel 321 on the support 32 and enters the annular groove or the first annular cavity of the fixed plate 31 under the action of gravity.

[0093] The refrigerant flows in the annular groove or the first annular cavity, performs heat exchange with the outer surface of the bearing 4, and absorbs heat by evaporation.

[0094] Since the temperature at the second bearing 42 is high and the temperature at the first bearing 41 is low, heat is transferred through the thrust plate 5 to cool the second bearing 42. After heat exchange with the bearing 4, part of the refrigerant becomes gaseous, and part of it is not completely exchanged with heat to become liquid refrigerant. The refrigerant after heat exchange flows from the liquid outlet channel 322 set on the support 32 to the motor cavity 12.

[0095] The technical solution provided by the embodiments of the present disclosure can effectively solve the problems of excessive bearing temperature and uneven cooling during the operation of the compressor shaft, ensuring that the bearings in the compressor are fully cooled and the compressor operates efficiently and reliably.

[0096] Some embodiments provide an air conditioner, comprising the above-mentioned compressor.

[0097] In some embodiments, the air conditioner further includes a condenser, which is connected to the liquid inlet channel 321 .

[0098] The condenser is connected to the liquid storage chamber 11 through a refrigerant branch. The refrigerant flowing out of the liquid storage chamber 11 is used to cool the bearing. At the same time, the refrigerant in the liquid storage chamber 11 can adjust the pressure of the liquid storage chamber 11 due to the effect of the refrigerant gravity.

[0099] In some embodiments, the air conditioner includes a circulating refrigeration system formed by a compressor, a condenser, and an evaporator, and the refrigerant in the liquid inlet channel 321 can come from the circulating refrigeration system.

[0100] In the description of the present invention, it should be understood that the use of terms such as "first", "second", and "third" to limit components is only for the convenience of distinguishing the above components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0101] In addition, unless explicitly denied, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A compressor, characterized in that: include: A housing (1) is formed with a cavity; A rotating shaft (2) is arranged in the cavity; A fixing member (3) is disposed in the cavity and fixedly connected to the housing (1); and A bearing (4) is disposed on the rotating shaft (2) and fixedly connected to the fixing member (3); the bearing (4) comprises a gas bearing; The fixing member (3) is provided with a liquid inlet channel (321), and the liquid inlet channel (321) is used to introduce a refrigerant to cool the bearing (4); The fixing member (3) comprises a fixing plate (31), the fixing plate (31) being provided with a first through hole (34) for the rotating shaft (2) to pass through, a first side of the fixing plate (31) being fixedly connected to the bearing (4), a second side of the fixing plate (31) being provided with an annular groove (33) around the first through hole (34) or a first annular cavity being provided between the first side and the second side of the fixing plate (31) around the first through hole (34), and the liquid inlet channel (321) being in communication with the annular groove (33) or the first annular cavity.

2. The compressor according to claim 1, characterized in that It comprises a liquid storage chamber (11), wherein the liquid storage chamber (11) is arranged on the housing (1), and the liquid storage chamber (11) is in communication with the liquid inlet channel (321).

3. The compressor according to claim 2, characterized in that The liquid storage chamber (11) is arranged at the upper part of the shell (1).

4. The compressor according to claim 1, characterized in that The fixing member (3) comprises a support (32), the support (32) being fixedly connected to the second side of the fixing plate (31), the liquid inlet channel (321) being provided on the support (32), the support (32) also being provided with a liquid outlet channel (322), the liquid outlet channel (322) being in communication with the annular groove (33) or the first annular cavity.

5. The compressor according to claim 4, characterized in that The support (32) is provided with a second through hole for the rotating shaft (2) to pass through, the liquid inlet channel (321) is provided above the second through hole and close to the outer edge of the support (32), and the liquid outlet channel (322) is provided below the second through hole and close to the second through hole.

6. The compressor according to claim 1, characterized in that The fixing plate (31) comprises a first fixing plate (311), and the annular groove (33) is provided on a second side of the first fixing plate (311).

7. The compressor according to claim 6, characterized in that The fixing member (3) comprises a support (32), the support (32) being fixedly connected to the second side of the first fixing plate (311), and the annular groove (33) cooperates with the support (32) to form a second annular cavity.

8. The compressor according to claim 6, characterized in that A first inlet (35) is provided on the second side of the first fixing plate (311); the first inlet (35) is provided above the first through hole (34) and at the outer edge of the annular groove (33); the first inlet (35) is connected to the liquid inlet channel (321) and the annular groove (33); the fixing member (3) is also provided with a liquid outlet channel (322) which is connected to the annular groove (33).

9. The compressor according to claim 6, characterized in that The annular groove (33) comprises a first annular groove (331) and a second annular groove (332); the first annular groove (331) is located on the outer periphery of the second annular groove (332); the first annular groove (331) is in communication with the second annular groove (332).

10. The compressor according to claim 9, characterized in that A first inlet (35) is provided on the second side of the first fixing plate (311), the first inlet (35) being connected to the liquid inlet channel (321) and the first annular groove (331), and the fixing member (3) is further provided with a liquid outlet channel (322), the liquid outlet channel (322) being connected to the second annular groove (332).

11. The compressor according to claim 1, characterized in that The fixing plate (31) comprises a second fixing plate (312), and the first annular cavity is provided between a first side and a second side of the second fixing plate (312).

12. The compressor according to claim 11, characterized in that A second inlet (36) and an outlet (37) are provided on the second side of the second fixing plate (312); the second inlet (36) is provided above the first through hole (34) and at the outer edge of the first annular cavity; and the outlet (37) is provided below the first through hole (34) and close to the first through hole (34); The second inlet (36) is connected to the first annular cavity and the liquid inlet channel (321), the fixing member (3) is further provided with a liquid outlet channel (322), and the outlet (37) is connected to the first annular cavity and the liquid outlet channel (322).

13. The compressor according to claim 1, characterized in that The bearing (4) comprises an axial bearing.

14. The compressor according to claim 1, characterized in that The invention also comprises a thrust plate (5) and a diffuser (6), wherein the bearing (4) comprises a first bearing (41) and a second bearing (42), wherein the first bearing (41) is arranged between the thrust plate (5) and the fixing member (3), and the first bearing (41) is fixedly connected to the fixing member (3); and the second bearing (42) is arranged between the thrust plate (5) and the diffuser (6), and the second bearing (42) is fixedly connected to the diffuser (6).

15. The compressor according to claim 1, characterized in that It also includes a motor, the motor is arranged in the cavity, the area where the motor is installed is a motor cavity (12), and the fixing member (3) is also provided with a liquid outlet channel (322), the liquid outlet channel (322) is connected to the motor cavity (12).

16. An air conditioner, characterized in that: Comprising the compressor according to any one of claims 1 to 15.

17. The air conditioner according to claim 16, characterized in that: It comprises a condenser, and the condenser is in communication with the liquid inlet channel (321).

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