Diffuser, compressor and air conditioner with air supply passage

Abstract

The present invention relates to a diffuser, a compressor and an air conditioner with an air supply channel. The diffuser comprises: a diffuser body; and a first air supply channel, which is arranged in the diffuser body and is used to supply air to a gas bearing. The present invention solves the air supply problem of the gas bearing and stabilizes the gas pressure at the thrust bearing.

Description

Technical Field

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

[0002] Static pressure gas bearings have the advantages of ultra-high precision, ultra-low friction, ultra-low vibration, ultra-low noise, long life and no pollution. They are also suitable for high-speed and high-precision occasions and have broad application prospects in centrifugal compressors, especially miniaturized centrifugal compressors.

[0003] First of all, the bearing clearance of micrometers or tens of micrometers requires extremely high processing and assembly precision. In addition, since static pressure gas bearings require an external gas source to supply air, the working back pressure of the bearing must be stable to prevent the fluctuation of the bearing back pressure from causing damage to the air film and causing the bearing rotor system to become unstable and damaged. Summary of the invention

[0004] One of the objectives of the present invention is to provide a diffuser, a compressor and an air conditioner with an air supply passage, so as to alleviate the problem of gas bearing pressure fluctuation.

[0005] Some embodiments of the present invention provide a diffuser, comprising: a diffuser body; and a first gas supply passage, disposed in the diffuser body and used for supplying gas to a gas bearing.

[0006] In some embodiments, the first gas supply channel includes: an introduction channel for introducing gas; an outlet channel for providing the gas introduced by the introduction channel to the gas bearing; and a connecting channel connecting the introduction channel and the outlet channel.

[0007] In some embodiments, the diffuser body is provided with a through hole allowing the shaft to rotate, and the through hole comprises: a first hole; and a second hole, wherein the aperture of the second hole is larger than the aperture of the first hole; and the gas bearing is arranged in the second hole.

[0008] In some embodiments, the inner wall of the first hole is provided with a shaft sealing structure for forming a dynamic seal with the rotating shaft.

[0009] In some embodiments, one end of the diffuser body is constructed as a stop structure; the stop structure includes: a first stop portion, used to abut against a first side of the part to be installed; and a second stop portion, used to abut against a second side of the part to be installed and to be connected to the part to be installed; the radial dimension of the second stop portion is greater than the radial dimension of the first stop portion; the first side and the second side of the part to be installed are adjacent sides.

[0010] Some embodiments of the present invention provide a compressor, comprising: a shell; a rotating shaft rotatably disposed in the shell; a first thrust bearing for supporting the rotating shaft; and the diffuser in the above embodiment; the diffuser is fixedly connected to an end of the shell, and the first air supply channel is used to supply air to the first thrust bearing.

[0011] In some embodiments, the compressor further includes: a thrust plate fixedly disposed at the end of the rotating shaft and rotating with the rotating shaft; and a second thrust bearing, which is a gas bearing, wherein the second thrust bearing and the first thrust bearing are respectively disposed on opposite sides of the thrust plate.

[0012] In some embodiments, a connection portion is extended from the inner wall of the shell toward the central axis of the inside of the shell, and the second thrust bearing is fixedly connected to the connection portion.

[0013] In some embodiments, the connecting portion is provided with a second air supply channel, and the second air supply channel is used to supply air to the second thrust bearing.

[0014] In some embodiments, the first gas supply channel is in communication with the second gas supply channel, and the gas in the first gas supply channel originates from the second gas supply channel.

[0015] In some embodiments, the diffuser is provided with a through hole allowing the rotating shaft to rotate, and the through hole includes: a first hole; and a second hole, wherein the aperture of the second hole is larger than the aperture of the first hole; the first thrust bearing is arranged in the second hole; the thrust plate includes: a first portion, which is arranged in the first hole of the diffuser; and a second portion, which is arranged in the second hole of the diffuser.

[0016] In some embodiments, a shaft sealing structure is disposed on an inner wall of the first hole of the diffuser, and the shaft sealing structure forms a dynamic seal with the first portion of the thrust plate.

[0017] In some embodiments, the inner wall of the shell is provided with a connection portion extending toward the central axis direction of the inside of the shell, and the diffuser is fixedly connected to the connection portion.

[0018] In some embodiments, one end of the diffuser connected to the shell is constructed as a stop structure, and the stop structure is used to cooperate with the connecting part for positioning; the stop structure includes: a first stop portion, which abuts against the first side surface of the connecting part; and a second stop portion, which abuts against the second side surface of the connecting part and is connected to the connecting part; the first side surface and the second side surface of the connecting part are adjacent sides.

[0019] In some embodiments, the connecting portion is provided with a second gas supply channel, the first gas supply channel is communicated with the second gas supply channel, and the gas of the first gas supply channel comes from the second gas supply channel.

[0020] In some embodiments, the compressor includes: a radial bearing, which is a gas bearing, for supporting the rotating shaft; the inner wall of the shell is provided with a connecting portion extending toward the central axis of the inside of the shell, and the radial bearing is fixedly connected to the connecting portion.

[0021] In some embodiments, the compressor comprises a centrifugal compressor.

[0022] Some embodiments of the present invention provide an air conditioner, which includes the compressor in the above embodiment.

[0023] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0024] In some embodiments, the diffuser is provided with an air supply channel for supplying air to the first thrust bearing, which solves the air supply problem of the gas bearing and stabilizes the gas pressure at the thrust bearing.

[0025] In some embodiments, the diffuser, bearing fixing plate and shaft seal are integrated into one, which solves the problems of large bearing load, low bending mode critical speed and reduced rotor stiffness caused by the excessive rotor length. At the same time, it also makes it easy to ensure the processing accuracy and unify the assembly datum, which greatly reduces the difficulty of processing and assembly. While reducing the assembly technical requirements, it improves the assembly efficiency and assembly accuracy, ensures the verticality of the thrust bearing, and improves the reliability and stability of the bearing rotor system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 A cross-sectional schematic diagram of a diffuser provided in some embodiments of the present invention;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of a diffuser provided in some embodiments of the present invention;

[0029] Figure 3 A schematic diagram of partial assembly of a compressor provided in some embodiments of the present invention.

[0030] Description of the reference numerals in the accompanying drawings:

[0031] 1- housing;

[0032] 2- Shaft

[0033] 3-First thrust bearing;

[0034] 4-diffuser; 41-first air supply channel; 42-first hole; 43-second hole; 44-first stopper; 45-second stopper; 46-shaft sealing structure;

[0035] 5-Thrust plate;

[0036] 6-second thrust bearing;

[0037] 7- radial bearing;

[0038] 8- plug;

[0039] 9- impeller;

[0040] 10-Locking piece. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] like Figure 1 , Figure 2 , which is a schematic diagram of a diffuser 4 provided in some embodiments.

[0044] Some embodiments provide a diffuser 4, which includes a diffuser body and a first gas supply channel 41. The first gas supply channel 41 is disposed in the diffuser body and is used to supply gas to the gas bearing.

[0045] In some embodiments, the first gas supply channel 41 includes an introduction channel, an outlet channel and a communication channel. The introduction channel is used to introduce gas. The outlet channel is used to provide the gas introduced by the introduction channel to the gas bearing. The communication channel connects the introduction channel and the outlet channel.

[0046] In some embodiments, the diffuser body is provided with a through hole allowing the rotating shaft 2 to rotate. The rotating shaft 2 may be the rotating shaft of the compressor.

[0047] The through hole includes a first hole 42 and a second hole 43. The aperture of the second hole 43 is larger than the aperture of the first hole 42. The inner wall surface of the second hole 43 is used for fixing and connecting the gas bearing.

[0048] In some embodiments, a shaft sealing structure 46 for forming a dynamic seal with the rotating shaft 2 is disposed on the inner wall of the first hole 42 on the diffuser body.

[0049] In some embodiments, one end of the diffuser body is configured as a stop structure; the stop structure includes a first stop portion 44 and a second stop portion 45 .

[0050] The first stop portion 44 is used to abut against a first side surface of the component to be installed.

[0051] The second stop portion 45 is used to abut against the second side surface of the component to be installed, and the second stop portion 45 is used to connect with the component to be installed; the radial dimension of the second stop portion 45 is greater than the radial dimension of the first stop portion 44 .

[0052] The first side surface and the second side surface of the component to be installed are adjacent side surfaces.

[0053] In some embodiments, the above-mentioned part to be installed is a shell of a compressor. Alternatively, the above-mentioned part to be installed is a connecting portion extending from the inner wall of the shell of the compressor.

[0054] like Figure 3 1 is a schematic diagram of a partial assembly of a compressor provided in some embodiments.

[0055] In some embodiments, the compressor includes a shell 1 , and a receiving cavity is formed in the shell 1 .

[0056] In some embodiments, the compressor includes a rotating shaft 2, which is rotatably disposed in the housing 1. The rotating shaft 2 is equivalent to the rotor of the compressor. Optionally, the rotating shaft 2 is disposed along the inner central axis direction of the housing 1.

[0057] In some embodiments, the compressor includes the diffuser 4 in the above embodiments.

[0058] In some embodiments, the compressor includes a first thrust bearing 3. The first air supply passage 41 of the diffuser 4 is used to supply air to the first thrust bearing 3. Further, the first thrust bearing 3 includes a static pressure gas bearing. The first thrust bearing 3 is used to support the rotating shaft 2.

[0059] In some embodiments, the diffuser 4 is disposed at the end of the rotating shaft 2. The diffuser 4 is fixedly connected to the end of the housing 1.

[0060] In some embodiments, Figure 1 , Figure 2 As shown, a first air supply passage 41 is provided in the diffuser 4 , and the first air supply passage 41 is used to supply air to the first thrust bearing 3 .

[0061] An air supply channel for supplying air to the first thrust bearing 3 is provided in the diffuser 4, which solves the air supply problem of the thrust bearing and stabilizes the pressure at the thrust bearing.

[0062] The air supply passage of the thrust bearing is integrated on the diffuser 4, which simplifies the structure of the air supply passage and prevents air leakage.

[0063] In some embodiments, the first thrust bearing 3 is fixedly connected to the diffuser 4. Optionally, the first thrust bearing 3 is fixed to the diffuser 4 by screws.

[0064] In some embodiments, the first air supply passage 41 includes an introduction passage for introducing gas. The introduction passage can directly guide the gas outside the compressor to the first thrust bearing 3, or the introduction passage can also guide the gas in the second air supply passage provided in the housing 1 of the compressor to the first thrust bearing 3 (described in detail below).

[0065] Optionally, the introduction channel is parallel to the rotating shaft 2 in the housing 1 of the compressor.

[0066] In some embodiments, the first gas supply channel 41 includes an outlet channel, and the outlet channel is used to provide the gas introduced by the introduction channel to the first thrust bearing 3.

[0067] Optionally, the outlet channel is parallel to the rotating shaft 2 in the housing 1 of the compressor.

[0068] Optionally, in order to prevent gas leakage from the outlet channel, sealing rings are provided on the diffuser 4 and on both sides of the outlet channel.

[0069] In some embodiments, the first air supply channel 41 includes a communication channel connecting the introduction channel and the outlet channel.

[0070] Optionally, for the convenience of processing, the communication channel is also connected to the outside of the diffuser 4 , and a plug 8 may be provided at the end where the communication channel is connected to the outside of the diffuser 4 .

[0071] In some embodiments, the diffuser 4 includes a through hole that allows the rotating shaft 2 to rotate, and the through hole includes a first hole 42 and a second hole 43. The second hole 43 has a larger diameter than the first hole 42, and the second hole 43 is located inside the housing 1 relative to the first hole 42.

[0072] In some embodiments, the first thrust bearing 3 is disposed in the second hole 43 and fixedly connected to the wall surface of the second hole 43 .

[0073] The radial dimension of the first thrust bearing 3 is smaller than the diameter of the second hole 43 .

[0074] The diffuser 4 is used for being fixedly connected with the first thrust bearing 3. The diffuser 4 integrates the function of the thrust bearing fixing plate, which not only makes it easy to ensure the processing accuracy, but also unifies the assembly reference, thereby reducing the assembly technical requirements while improving the assembly accuracy and ensuring the verticality of the thrust bearing. At the same time, it also reduces the rotor length and the bearing load, and improves the rotor stiffness and the stability of the bearing-rotor system.

[0075] In some embodiments, the compressor includes a thrust plate 5. The thrust plate 5 is fixed to the end of the rotating shaft 2, and the thrust plate 5 rotates with the rotating shaft 2.

[0076] In some embodiments, the compressor includes a second thrust bearing 6, and the second thrust bearing 6 and the first thrust bearing 3 are respectively arranged on opposite sides of the thrust plate 5. The second thrust bearing 6 includes a gas bearing. Preferably, the second thrust bearing 6 includes a static pressure gas bearing.

[0077] In some embodiments, a connection portion is extended from the inner wall of the housing 1 toward the central axis of the interior of the housing 1 , and the second thrust bearing 6 is fixedly connected to the connection portion.

[0078] In some embodiments, a connecting portion disposed on the inner wall of the housing 1 is provided with a second air supply channel, and the second air supply channel is used to supply air to the second thrust bearing 6 .

[0079] Furthermore, the gas in the second gas supply passage comes from outside the compressor.

[0080] In some embodiments, the first gas supply channel 41 is connected to the second gas supply channel, and the gas of the first gas supply channel 41 comes from the second gas supply channel.

[0081] In some embodiments, the thrust plate 5 includes a first portion and a second portion. The first portion is disposed in the first hole 42 of the diffuser 4. The second portion is disposed in the second hole 43 of the diffuser 4.

[0082] The radial dimension of the second portion of the thrust plate 5 is smaller than the diameter of the second hole 43. The radial dimension of the second portion of the thrust plate 5 is smaller than the radial dimension of the first thrust bearing 3 and / or the radial dimension of the second thrust bearing 6.

[0083] Optionally, the first portion and the second portion of the thrust plate 5 are both cylindrical, and the radial dimension of the first portion is smaller than the radial dimension of the second portion.

[0084] In some embodiments, a shaft sealing structure 46 is disposed on the inner wall of the first hole 42 of the diffuser 4 , and the shaft sealing structure 46 forms a dynamic seal with the first portion of the thrust plate 5 .

[0085] Optionally, the shaft sealing structure 46 includes a comb teeth sealing structure.

[0086] The shaft seal is integrated into the diffuser 4, and the bearing fixing plate is also integrated into the diffuser 4, that is, the diffuser 4, the shaft seal and the thrust bearing fixing plate are integrated into one part, so that the shaft seal requiring high coaxiality and the thrust bearing requiring high verticality share a common positioning, unify the assembly reference, reduce the assembly difficulty, and improve the assembly accuracy, thereby solving the wear problem of the comb-teeth seal shaft seal structure 46 caused by insufficient coaxiality and the problem of reduced performance and failure of the thrust bearing caused by insufficient verticality.

[0087] Furthermore, the diffuser 4, the shaft seal and the thrust bearing fixing plate are integrated into one part, which reduces the number of parts and improves quality control; while meeting the functional requirements, the length of these parts is reduced, thereby reducing the length of the rotor, which not only improves the stiffness of the rotor and the critical speed of the bending mode of the bearing-rotor system, but also reduces the rotor weight and bearing load, both of which together improve the stability of the bearing-rotor system.

[0088] In some embodiments, the inner wall of the housing 1 is provided with a connection portion extending toward the central axis of the housing 1, and the diffuser 4 is fixedly connected to the connection portion. Optionally, the diffuser 4 is fixedly connected to the connection portion by screws.

[0089] In some embodiments, one end of the diffuser 4 connected to the housing 1 is constructed as a stopper structure, and the stopper structure is used to cooperate with the connecting portion for positioning.

[0090] In some embodiments, the stop structure includes a first stop portion 44 , and the first stop portion 44 abuts against the first side surface of the connecting portion.

[0091] In some embodiments, the stop structure includes a second stop portion 45 , the second stop portion 45 abuts against the second side surface of the connecting portion and is connected to the inner wall of the housing 1 .

[0092] In some embodiments, the first side surface and the second side surface of the connecting portion are adjacent sides.

[0093] The radial dimension of the first stopper portion 44 is smaller than the radial dimension of the second stopper portion 45. The second stopper portion 45 is disposed around the outer circumference of the first stopper portion 44.

[0094] In some embodiments, the connecting portion is provided with a second gas supply channel, the first gas supply channel 41 is communicated with the second gas supply channel, and the gas of the first gas supply channel 41 comes from the second gas supply channel.

[0095] In some embodiments, the compressor includes a radial bearing 7. The radial bearing 7 is a gas bearing. The radial bearing 7 is arranged on the outer periphery of the rotating shaft 2 to support the rotating shaft 2. Optionally, the radial bearing 7 is a static pressure gas bearing.

[0096] The inner wall of the housing 1 is provided with a connecting portion extending in the direction of the central axis of the housing 1 , and the radial bearing 7 is fixedly connected to the connecting portion.

[0097] The radial bearing 7 is located inside the housing 1 relative to the thrust bearing.

[0098] In some implementations, the connection portion provided on the inner wall of the housing 1 may be connected to the diffuser 4, the second thrust bearing 6 and the radial bearing 7. The second air supply passage provided on the connection portion supplies air to the second thrust bearing 6, and may also supply air to the first thrust bearing 3 through the first air supply passage 41 provided on the diffuser 4 at the same time.

[0099] The connecting portion provided on the inner wall of the housing 1 is in a stepped shape, and the lengths of the connecting portions extending toward the inner central axis of the housing 1 are different.

[0100] Furthermore, the connecting portion provided on the inner wall of the shell 1 is also provided with an intermediate channel, and the intermediate channel connects the second air supply channel with the first air supply channel 41 provided in the diffuser 4 .

[0101] The external gas of the compressor is first introduced through the second air supply channel in the inner wall connection part of the shell 1 to supply the second thrust bearing 6, and at the same time enters the first air supply channel 41 of the diffuser 4 through the intermediate channel, and then supplied to the first thrust bearing 3 by the first air supply channel 41.

[0102] Optionally, a sealing ring is provided at the mating position of the connection between the diffuser 4 and the housing 1, and at the mating position between the diffuser 4 and the second thrust bearing 6, and sealing rings are provided on both sides of the first air supply channel 41 to prevent air supply leakage.

[0103] In some specific embodiments, the first thrust bearing 3 is first fixed to the diffuser 4 by screws, and then the diffuser 4 is positioned on the housing 1 by a stop structure, and then accurately positioned by pins. The coaxiality of the shaft seal structure 46 on the diffuser 4 and the verticality of the thrust bearing fixing surface are both guaranteed on one part, which not only reduces the processing difficulty, but also greatly reduces the cumulative assembly error. The shaft seal requiring high coaxiality and the thrust bearing requiring high verticality share the stop and pin positioning, unify the assembly reference, reduce the assembly difficulty, and improve the assembly accuracy, thereby solving the problem of comb seal wear caused by insufficient coaxiality and the problem of thrust bearing performance degradation and failure caused by insufficient verticality.

[0104] In some implementations, the compressor includes an impeller 9, an end of the rotating shaft 2 passes through the housing 11, and the impeller 9 is fixed to the end of the rotating shaft 2. The impeller 9 cooperates with the diffuser 4 to be positioned.

[0105] Furthermore, the impeller 9 is fixed to the rotating shaft 2 via a locking member 10 .

[0106] In some implementations, the end face of the shell 1 is the mating face of the diffuser 4. The diffuser 4 converts the velocity energy of the medium at the outlet of the impeller 9 into pressure energy. The channel inside the diffuser 4 is the thrust bearing air supply channel, which supplies air to the thrust bearing. The inner hole of the diffuser 4 is provided with a shaft seal structure 46, which cooperates with the rotor to form a shaft seal to prevent the exhaust gas of the impeller 9 from entering the shell 1. The right end face of the diffuser 4 is the thrust bearing fixing surface. The first thrust bearing 3 is directly locked to the right end face of the diffuser 4 by screws to withstand the axial force of the rotor.

[0107] In some implementations, a first air supply channel 41 for supplying air to the first thrust bearing 3 is provided in the diffuser 4, and the diffuser function, the thrust bearing fixing plate function and the shaft seal function are integrated on the diffuser 4, which can not only ensure the normal air supply to the gas bearing, but also shorten the rotor length, reduce the bearing load, and improve the rotor stiffness and the critical speed and stability of the bending mode of the bearing-rotor system. At the same time, it also makes it easy to ensure the processing accuracy, unify the assembly datum, and improve the assembly accuracy while reducing the assembly technical requirements, thereby ensuring the verticality of the thrust bearing.

[0108] In some embodiments, the compressor comprises a centrifugal compressor.

[0109] Some embodiments provide an air conditioner, comprising the compressor in any of the above embodiments.

[0110] 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.

[0111] 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: Housing (1); A rotating shaft (2) rotatably disposed in the housing (1); A first thrust bearing (3), used for supporting the rotating shaft (2); and A diffuser (4); the diffuser (4) is fixedly connected to an end of the housing (1), the diffuser (4) comprises a diffuser body and a first air supply passage (41), the first air supply passage (41) is arranged in the diffuser body, and the first air supply passage (41) is used to supply air to the first thrust bearing (3); the diffuser (4) is provided with a through hole allowing the rotating shaft (2) to rotate, the through hole comprises a first hole (42) and a second hole (43), the aperture of the second hole (43) is larger than the aperture of the first hole (42); the first thrust bearing (3) is arranged in the second hole (43) and is fixedly connected to the wall of the second hole (43); a thrust plate (5) fixedly disposed at an end of the rotating shaft (2) and rotating along with the rotating shaft (2); the thrust plate (5) comprises a first portion and a second portion, the first portion being disposed in a first hole (42) of the diffuser (4); the second portion being disposed in a second hole (43) of the diffuser (4); as well as A shaft sealing structure (46) is arranged on the inner wall of the first hole (42) of the diffuser (4), and the shaft sealing structure (46) forms a dynamic seal with a first portion of the thrust plate (5).

2. The compressor according to claim 1, characterized in that The first air supply channel (41) comprises: an introduction channel for introducing gas; an outlet channel, used for supplying the gas introduced by the inlet channel to the first thrust bearing (3); and A communication channel connects the introduction channel and the outlet channel.

3. The compressor according to claim 1, characterized in that Also includes: The second thrust bearing (6) is a gas bearing, and the second thrust bearing (6) and the first thrust bearing (3) are respectively arranged on opposite sides of the thrust plate (5).

4. The compressor according to claim 3, characterized in that The inner wall of the housing (1) extends a connection portion in the direction of the central axis inside the housing (1), and the second thrust bearing (6) is fixedly connected to the connection portion.

5. The compressor according to claim 4, characterized in that The connecting portion is provided with a second air supply channel, and the second air supply channel is used to supply air to the second thrust bearing (6).

6. The compressor according to claim 5, characterized in that The first gas supply channel (41) is in communication with the second gas supply channel, and the gas in the first gas supply channel (41) originates from the second gas supply channel.

7. The compressor according to claim 1, characterized in that The inner wall of the shell (1) is provided with a connection portion extending in the direction of the central axis inside the shell (1), and the diffuser (4) is fixedly connected to the connection portion.

8. The compressor according to claim 7, characterized in that One end of the diffuser (4) connected to the housing (1) is constructed as a stopper structure, the stopper structure being used to cooperate with the connecting portion for positioning; the stopper structure comprises: A first stop portion (44) abuts against a first side surface of the connecting portion; and A second stop portion (45) abuts against a second side surface of the connecting portion and is connected to the connecting portion; The first side surface and the second side surface of the connecting portion are adjacent side surfaces.

9. The compressor according to claim 8, characterized in that The radial dimension of the second stop portion (45) is greater than the radial dimension of the first stop portion (44).

10. The compressor according to claim 7, characterized in that The connecting portion is provided with a second air supply channel, the first air supply channel (41) is in communication with the second air supply channel, and the gas of the first air supply channel (41) originates from the second air supply channel.

11. The compressor according to claim 1, characterized in that include: The radial bearing (7) is a gas bearing used to support the rotating shaft (2); the inner wall of the housing (1) is provided with a connecting portion extending in the direction of the central axis inside the housing (1), and the radial bearing (7) is fixedly connected to the connecting portion.

12. The compressor according to claim 1, characterized in that The compressor comprises a centrifugal compressor.

13. An air conditioner, characterized in that: Comprising the compressor according to any one of claims 1 to 12.

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