Compressor and refrigerant circulation loop

Abstract

The utility model provides a compressor and a refrigerant circulation loop. The compressor comprises a shell, a motor stator, a motor rotor, a first air bearing, a second air bearing, a first bearing support, a second bearing support and an air bearing cooling part. And the first air bearing and the second air bearing are respectively sleeved at two axial ends of the motor rotor. The air bearing cooling part comprises a first cooling gas inlet, a second cooling gas inlet, a cooling gas outlet and a cooling flow channel communicated with the first cooling gas inlet, the second cooling gas inlet and the cooling gas outlet; the first cooling gas inlet, the second cooling gas inlet and the cooling gas outlet are located in the shell wall of the shell so as to communicate with the exterior of the shell, and the cooling runner is arranged in the mounting cavity and configured to cool the first air bearing and the second air bearing. The compressor is beneficial for realizing effective and stable cooling of the first air bearing and the second air bearing.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a compressor and a refrigerant circulation loop. Background Technology

[0002] Air bearings are widely used in compressors due to their advantages of being oil-free and having a simple structure, and are currently widely applied in many fields such as medical, food, and aerospace. However, air bearings generate a large amount of heat under high-speed friction, which can easily cause them to burn out, affecting the reliability of the air bearing structure and consequently the service life of the compressor.

[0003] The above statements are for the purpose of providing background information in relation to this application only, and do not necessarily constitute prior art. Utility Model Content

[0004] The purpose of this application is to provide a compressor and refrigerant circulation loop, which aims to solve the problem that the air bearing generates a large amount of heat under high-speed friction, which can easily burn out the air bearing and affect the reliability of the air bearing structure.

[0005] To achieve the above objectives, this application provides a compressor, comprising: a housing having a mounting cavity; a motor stator disposed within the mounting cavity and having a mounting hole; a motor rotor rotatably disposed within the mounting hole; a first air bearing and a second air bearing respectively sleeved on the axial ends of the motor rotor to support the rotation of the motor rotor relative to the motor stator; a first bearing support and a second bearing support fixedly disposed relative to the housing, the first air bearing and the second air bearing respectively disposed within the first bearing support and the second bearing support; and an air bearing cooling section, comprising a first cooling gas inlet, a second cooling gas inlet, a cooling gas outlet, and a cooling channel connecting the first cooling gas inlet, the second cooling gas inlet, and the cooling gas outlet, the first cooling gas inlet, the second cooling gas inlet, and the cooling gas outlet being located on the shell wall of the housing to communicate with the outside of the housing, and the cooling channel being disposed within the mounting cavity and configured to cool the first air bearing and the second air bearing.

[0006] In some embodiments of the compressor, the air bearing cooling section includes a parameter adjustment device configured to adjust the parameters of the cooling gas entering the cooling channel through at least one of the first cooling gas inlet and the second cooling gas inlet.

[0007] In some embodiments of the compressor, the parameter regulating device includes: a temperature regulating device configured to regulate the temperature of cooling gas entering the cooling channel through at least one of a first cooling gas inlet and a second cooling gas inlet; and / or a flow regulating device configured to regulate the flow rate of cooling gas entering the cooling channel through at least one of the first cooling gas inlet and the second cooling gas inlet; and / or a pressure regulating device configured to regulate the pressure of cooling gas entering the cooling channel through at least one of the first cooling gas inlet and the second cooling gas inlet.

[0008] In some embodiments of the compressor, the temperature regulating device includes a first temperature regulating section configured to regulate the temperature of cooling gas entering the cooling channel through a first cooling gas inlet; and / or the temperature regulating device includes a second temperature regulating section configured to regulate the temperature of cooling gas entering the cooling channel through a second cooling gas inlet; and / or the flow regulating device includes a first flow regulating section configured to regulate the flow rate of cooling gas entering the cooling channel through the first cooling gas inlet; and / or the flow regulating device includes a second flow regulating section configured to regulate the temperature of cooling gas entering the cooling channel through the second cooling gas inlet; and / or the pressure regulating device includes a first pressure regulating section configured to regulate the pressure of cooling gas entering the cooling channel through the first cooling gas inlet; and / or the pressure regulating device includes a second pressure regulating section configured to regulate the pressure of cooling gas entering the cooling channel through the second cooling gas inlet.

[0009] In some embodiments of the compressor, the compressor further includes: a first temperature detection device and a second temperature detection device, configured to detect a first temperature of the first air bearing and a second temperature of the second air bearing, respectively; and a control device, signal-connected to the first temperature detection device, the second temperature detection device and the parameter adjustment device, configured to adjust the operation of the control device according to the first temperature and the second temperature control parameters.

[0010] In some embodiments of the compressor, the cooling channels include: a first bearing cooling channel configured to cool a first air-bearing bearing; and / or a motor cooling channel configured to cool a motor stator and / or a motor rotor; and / or a second bearing cooling channel configured to cool a second air-bearing bearing.

[0011] In some embodiments of the compressor, the cooling channels include a first bearing cooling channel, a motor cooling channel, and a second bearing cooling channel, which are arranged sequentially along the flow direction of the cooling gas.

[0012] In some embodiments of the compressor, along the flow direction of the cooling gas, a first cooling gas inlet is located upstream of the first bearing cooling channel, and a second cooling gas inlet is located between the first bearing cooling channel and the motor cooling channel.

[0013] In some embodiments of the compressor, the first bearing cooling channel includes a first gap between the first air bearing and the motor rotor; and / or the motor cooling channel includes a second gap between the motor stator and the motor rotor; and / or the second bearing cooling channel includes a third gap between the second air bearing and the motor rotor.

[0014] In some embodiments of the compressor, the cooling flow channel further includes: a first gas inlet channel disposed between the first cooling gas inlet and the first bearing cooling channel; and / or a second gas inlet channel disposed between the second cooling gas inlet and the motor cooling channel; and / or a connecting channel disposed between the motor cooling channel and the second bearing cooling channel; and / or a gas outlet channel disposed between the second bearing cooling channel and the cooling gas outlet.

[0015] In some embodiments of the compressor, the first gas inlet channel includes a housing inlet section disposed within the housing wall and / or a support inlet section disposed within the first bearing support and / or a spacer inlet section disposed between the first bearing support and the motor rotor; and / or the second gas inlet channel includes a first spacer disposed between the first bearing support and the motor stator and / or a second spacer disposed between the first air bearing and the motor stator; and / or the connecting channel includes a third spacer disposed between the motor stator and the second bearing support and / or a spacer connecting section disposed between the second bearing support and the motor rotor; and / or the compressor further includes an end plate disposed on the second bearing support at the end away from the first bearing support, the end plate being fixed to the housing, and the gas outlet channel includes a fourth spacer disposed between the second air bearing and the end plate and / or a fifth spacer disposed between the second bearing support and the end plate.

[0016] In some embodiments of the compressor, the housing inlet section includes a first axial channel and a first radial channel. The first axial channel extends axially along the housing and its two ends are connected to a first cooling gas inlet and a first radial channel, respectively. The first radial channel extends radially along the housing and its end away from the first axial channel is connected to a support inlet section. And / or the support inlet section includes a second radial channel, a second axial channel, and a third radial channel. The second radial channel extends radially along the housing and its two ends are connected to the housing inlet section and the second axial channel, respectively. The second axial channel extends axially along the housing and its end away from the second radial channel is connected to the third radial channel. The third radial channel extends radially along the housing and its end away from the second axial channel is connected to a spacer inlet section. And / or the spacer inlet section includes a first annular channel. The two ends of the first annular channel along the housing axial direction are connected to the support inlet section and a first bearing cooling channel, respectively. And / or the spacer connection section includes a second annular channel. The two ends of the second annular channel along the housing axial direction are connected to a third spacer and a second bearing cooling channel, respectively.

[0017] A second aspect of this application provides a refrigerant circulation loop, including the compressor of the first aspect of this application.

[0018] The compressor provided in this application includes an air-bearing cooling section comprising a first cooling gas inlet, a second cooling gas inlet, a cooling gas outlet, and a cooling channel connecting the first cooling gas inlet, the second cooling gas inlet, and the cooling gas outlet. The first and second cooling gas inlets can be used individually or in combination to provide cooling gas to the cooling channel that better meets the cooling requirements. Cooling gas can be introduced from outside the compressor into the cooling channel through at least one of the first and second cooling gas inlets according to the cooling requirements of the air-bearing bearings. The cooling gas flows through the cooling channel, cooling both the first and second air-bearing bearings, and is then led out of the compressor through the cooling gas outlet. Because the cooling gas is introduced from outside the compressor and flows through the cooling channel to achieve its cooling function before exiting the compressor, the temperature, pressure, and flow rate of the cooling gas are largely unaffected by the compressor's operating state. This facilitates effective and stable cooling of the first and second air-bearing bearings, thereby improving the reliability of the air-bearing bearing structure and extending the compressor's service life.

[0019] The refrigerant circulation loop provided in this application has the same advantages as the compressor provided in this application.

[0020] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic cross-sectional view of a compressor according to some embodiments of this application.

[0023] Figure 2 for Figure 1 A schematic enlarged cross-sectional view of the compressor at point A.

[0024] Figure 3 for Figure 1 A schematic cross-sectional view of the compressor, showing the flow direction of cooling gas within the cooling channels.

[0025] Figures 1 to 3 In the figures, the labels represent:

[0026] 1. Housing; 11. Mounting cavity; 2. Motor stator; 21. Mounting hole; 3. Motor rotor; 41. First air bearing; 42. Second air bearing; 51. First bearing support; 52. Second bearing support; 6. Air bearing cooling section; 61. First cooling gas inlet; 62. Second cooling gas inlet; 63. Cooling gas outlet; 64. Cooling channel; 641. First bearing cooling channel; 6411. First gap; 642. Motor cooling channel; 6421. Second gap; 643. Second bearing cooling channel; 6431. Third gap; 644. First gas introduction channel; 6441. Housing introduction. Section; 64411, First Axial Channel; 64412, First Radial Channel; 6442, Support Inlet Section; 64421, Second Radial Channel; 64422, Second Axial Channel; 64423, Third Radial Channel; 6443, Interval Inlet Section; 64431, First Annular Channel; 645, Second Gas Inlet Channel; 6451, First Interval; 6452, Second Interval; 646, Connecting Channel; 6461, Third Interval; 6462, Interval Connecting Section; 64621, Second Annular Channel; 647, Gas Outlet Channel; 6471, Fourth Interval; 6472, Fifth Interval; 7, End Plate. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] In the description of this application, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0030] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0031] Furthermore, when an element is referred to as being "on" another element, the element may be directly on the other element, or it may be indirectly on the other element with one or more intermediate elements inserted between them. Additionally, when an element is referred to as being "connected" to another element, the element may be directly connected to the other element, or it may be indirectly connected to the other element with one or more intermediate elements inserted between them. In the following drawings, the same reference numerals denote the same elements.

[0032] Unless otherwise required by the content, throughout the following description, the word “including” and its variations, such as “comprising” and “having”, will be interpreted in an open-ended, inclusive sense, that is, as “including but not limited to”.

[0033] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two).

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] To address the problem mentioned in the background art that air bearings generate a large amount of heat under high-speed friction, which can easily burn out the air bearings and affect the reliability of the air bearing structure, this application provides a compressor including an air bearing cooling section capable of cooling a first air bearing and a second air bearing. The compressor provided in this application is applicable to fields such as medical, food, and aerospace.

[0036] like Figure 1 middle Figure 3As shown, the compressor in this embodiment includes: a housing 1, a motor stator 2, a motor rotor 3, a first air bearing 41 and a second air bearing 42, a first bearing support 51 and a second bearing support 52, and an air bearing cooling section 6. The housing 1 has a mounting cavity 11. The motor stator 2 is disposed in the mounting cavity 11 and has a mounting hole 21. The motor rotor 3 is rotatably disposed in the mounting hole 21. The first air bearing 41 and the second air bearing 42 are respectively sleeved on the axial ends of the motor rotor 3 to support the rotation of the motor rotor 3 relative to the motor stator 2. The first bearing support 51 and the second bearing support 52 are fixedly disposed relative to the housing 1. The first air bearing 41 and the second air bearing 42 are respectively disposed in the first bearing support 51 and the second bearing support 52. The air bearing cooling section 6 includes a first cooling gas inlet 61, a second cooling gas inlet 62, a cooling gas outlet 63, and a cooling flow channel 64 connecting the first cooling gas inlet 61, the second cooling gas inlet 62, and the cooling gas outlet 63. The first cooling gas inlet 61, the second cooling gas inlet 62, and the cooling gas outlet 63 are located on the shell wall of the housing 1 to communicate with the outside of the housing 1. The cooling channel 64 is disposed in the mounting cavity 11 and is configured to cool the first air bearing 41 and the second air bearing 42.

[0037] By providing an air bearing cooling section 6 that includes a first cooling gas inlet 61, a second cooling gas inlet 62, a cooling gas outlet 63, and a cooling channel 64 connecting the first cooling gas inlet 61, the second cooling gas inlet 62, and the cooling gas outlet 63, the first cooling gas inlet 61 and the second cooling gas inlet 62 can be used individually or in combination to provide cooling gas that better meets the cooling requirements of the cooling channel 64. Cooling gas can be introduced from outside the compressor into the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 according to the cooling requirements of the air bearing. The cooling gas flows through the cooling channel 64, which can cool the first air bearing 41 and the second air bearing 42, and is led out to the outside of the compressor through the cooling gas outlet 63. Since the cooling gas is introduced from outside the compressor and flows through the cooling channel 64 to achieve its cooling function before flowing out to the outside of the compressor, the temperature, pressure and flow rate of the cooling gas are basically unaffected by the operating state of the compressor itself. This is conducive to achieving effective and stable cooling of the first air bearing 41 and the second air bearing 42, thereby improving the reliability of the air bearing structure and extending the service life of the compressor.

[0038] like Figures 1 to 3 As shown, in some embodiments of the compressor, the air bearing cooling section 6 includes a parameter adjustment device configured to adjust the parameters of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62.

[0039] By setting a parameter adjustment device, the parameters of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 can be adjusted so that the parameters of the cooling gas entering the cooling channel 64 can better meet the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42.

[0040] like Figures 1 to 3 As shown, in some embodiments of the compressor, the parameter regulating device includes: a temperature regulating device configured to regulate the temperature of cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62; and / or a flow regulating device configured to regulate the flow rate of cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62; and / or a pressure regulating device configured to regulate the pressure of cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62.

[0041] By incorporating a temperature regulating device, the temperature of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 is adjusted, ensuring that the temperature of the cooling gas entering the cooling channel 64 better meets the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42. Similarly, by incorporating a flow regulating device, the flow rate of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 is adjusted, ensuring that the flow rate of the cooling gas entering the cooling channel 64 better meets the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42. Finally, by incorporating a pressure regulating device, the pressure of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 is adjusted, ensuring that the pressure of the cooling gas entering the cooling channel 64 better meets the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42.

[0042] like Figures 1 to 3As shown, in some embodiments of the compressor, the temperature regulating device includes a first temperature regulating section configured to regulate the temperature of cooling gas entering the cooling channel 64 through the first cooling gas inlet 61; and / or the temperature regulating device includes a second temperature regulating section configured to regulate the temperature of cooling gas entering the cooling channel 64 through the second cooling gas inlet 62; and / or the flow regulating device includes a first flow regulating section configured to regulate the flow rate of cooling gas entering the cooling channel 64 through the first cooling gas inlet 61; and / or the flow regulating device includes a second flow regulating section configured to regulate the temperature of cooling gas entering the cooling channel 64 through the second cooling gas inlet 62; and / or the pressure regulating device includes a first pressure regulating section configured to regulate the pressure of cooling gas entering the cooling channel 64 through the first cooling gas inlet 61; and / or the pressure regulating device includes a second pressure regulating section configured to regulate the pressure of cooling gas entering the cooling channel 64 through the second cooling gas inlet 62.

[0043] By providing a first temperature regulating unit and / or a second temperature regulating unit, the temperature of the cooling gas entering the cooling channel 64 through the first cooling gas inlet 61 and / or the second cooling gas inlet 62 can be adjusted respectively. This facilitates ensuring that the temperature of the cooling gas in different sections of the cooling channel 64 better meets the cooling requirements, thereby achieving more effective cooling of the first air bearing 41 and the second air bearing 42. Similarly, by providing a first flow rate regulating unit and / or a second flow rate regulating unit, the flow rate of the cooling gas entering the cooling channel 64 through the first cooling gas inlet 61 and / or the second cooling gas inlet 62 can be adjusted respectively. This facilitates ensuring that the flow rate of the cooling gas in different sections of the cooling channel 64 better meets the cooling requirements, thereby achieving more effective cooling of the first air bearing 41 and the second air bearing 42. By setting the first pressure regulating unit and / or the second pressure regulating unit, the pressure of the cooling gas entering the cooling channel 64 through the first cooling gas inlet 61 and / or the second cooling gas inlet 62 can be adjusted respectively, which helps to make the flow rate of the cooling gas in different channel sections of the cooling channel 64 more in line with the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42.

[0044] The aforementioned temperature regulating devices include, for example, heat exchangers and semiconductor cooling fins. The aforementioned flow regulating devices include, for example, variable displacement pumps, regulating valves, and bypass channels. The aforementioned pressure regulating devices include, for example, pressure regulating valves and throttling devices.

[0045] In some embodiments of the compressor, the compressor further includes: a first temperature detection device and a second temperature detection device, configured to detect a first temperature of the first air bearing 41 and a second temperature of the second air bearing 42, respectively; and a control device, signal-connected to the first temperature detection device, the second temperature detection device and the parameter adjustment device, configured to adjust the operation of the control device according to the first temperature and the second temperature control parameters.

[0046] The first temperature detection device, the second temperature detection device, and the control device are set up so that the cooling gas entering the cooling channel 64 meets the cooling requirements based on the first temperature of the first air bearing 41 and the second temperature of the second air bearing 42, thereby improving the cooling effect of the first air bearing 41 and the second air bearing 42.

[0047] like Figures 1 to 3 As shown, in some embodiments of the compressor, the cooling channel 64 includes: a first bearing cooling channel 641 configured to cool a first air bearing 41; and / or a motor cooling channel 642 configured to cool a motor stator 2 and / or a motor rotor 3; and / or a second bearing cooling channel 643 configured to cool a second air bearing 42.

[0048] The cooling channel 64 includes a first bearing cooling channel 641 for cooling the first air bearing 41, through which the cooling gas flowing through the first bearing cooling channel 641 can more effectively cool the first air bearing 41. The cooling channel 64 also includes a motor cooling channel 642 for cooling the motor stator 2 and / or the motor rotor 3, through which the cooling gas flowing through the motor cooling channel 642 can more effectively cool the motor stator 2 and / or the motor rotor 3. Finally, the cooling channel 64 includes a second bearing cooling channel 643 for cooling the second air bearing 42, through which the cooling gas flowing through the second bearing cooling channel 643 can more effectively cool the second air bearing 42.

[0049] The first bearing cooling channel 641 may, for example, include a flow channel passing through the surface of the first air bearing 41 and / or include a flow channel passing through the interior of the first air bearing 41. The motor cooling channel 642 may, for example, include a flow channel passing through the surface of the motor stator 2 and / or the motor rotor 3 and / or include a flow channel passing through the interior of the motor stator 2 and / or the motor rotor 3. The first bearing cooling channel 642 may, for example, include a flow channel passing through the surface of the second air bearing 42 and / or include a flow channel passing through the interior of the second air bearing 42.

[0050] like Figures 1 to 3As shown, in some embodiments of the compressor, the cooling channel 64 includes a first bearing cooling channel 641, a motor cooling channel 642, and a second bearing cooling channel 643, which are arranged sequentially along the flow direction of the cooling gas.

[0051] Along the flow direction of the cooling gas, the first bearing cooling channel 641, the motor cooling channel 642, and the second bearing cooling channel 643 are arranged sequentially. Therefore, the cooling sequence of the first air bearing 41, the motor stator 2 and / or the motor rotor 3, and the second air bearing 42 is as follows: first, cool the first air bearing 41; then, cool the motor stator 2 and / or the motor rotor 3; and finally, cool the second air bearing 42. This is particularly suitable when the temperature near the first air bearing 41 is higher than the temperature near the second air bearing 42, facilitating the cooling of the first air bearing 41, the motor stator and / or the motor rotor, and the second air bearing 41 to the required operating temperature range. For example, this can be used when the compressor has a single-stage compression unit located at the outer end of the first air bearing 41, or when the compressor has a two-stage compression unit located at the outer end of the first air bearing 41 and the low-pressure stage compression unit located at the outer end of the second air bearing 41. Figures 1 to 3 The compression unit is not shown in the figure; the compression unit may be, for example, an impeller.

[0052] like Figures 1 to 3 As shown, in some embodiments of the compressor, along the flow direction of the cooling gas, a first cooling gas inlet 61 is located upstream of a first bearing cooling channel 641, and a second cooling gas inlet 62 is located between the first bearing cooling channel 641 and the motor cooling channel 642.

[0053] By placing the first cooling gas inlet 61 upstream of the first bearing cooling channel 641, the cooling gas passing through the first cooling gas inlet 61 can cool the first air bearing 41, the motor stator 2 and / or the motor rotor 3, and the second air bearing 42, thus fully utilizing the cooling capacity of the cooling gas entering the cooling channel 64 from the first cooling gas inlet 61. By placing the second cooling gas inlet 62 between the first bearing cooling channel 641 and the motor cooling channel 642, the cooling gas passing through the second cooling gas inlet 62 can cool the motor stator 2 and / or the motor rotor 3 and the second air bearing 42, effectively supplementing the cooling capacity of the cooling gas entering the cooling channel 64 from the first cooling gas inlet 61, ensuring that the motor stator 2 and / or the motor rotor 3 and the second air bearing 42 are also adequately cooled.

[0054] like Figures 1 to 3As shown, in some embodiments of the compressor, the first bearing cooling channel 641 includes a first gap 6411 between the first air bearing 41 and the motor rotor 3; and / or the motor cooling channel 642 includes a second gap 6421 between the motor stator 2 and the motor rotor 3; and / or the second bearing cooling channel 643 includes a third gap 6431 between the second air bearing 42 and the motor rotor 3.

[0055] By providing a first bearing cooling channel 641, including a first gap 6411 between the first air bearing 41 and the motor rotor 3, the cooling of the first bearing support 51 and the first air bearing 41 by the cooling gas can be at least partially achieved using the existing structure and relationships within the compressor, eliminating or reducing the need for specially designed and machined flow channel structures to form the first bearing cooling channel 641. Similarly, by providing a motor cooling channel 642, including a second gap 6421 between the motor stator 2 and the motor rotor 3, the cooling of the motor stator 2 and the motor rotor 3 by the cooling gas can be at least partially achieved using the existing structure and relationships within the compressor, eliminating or reducing the need for specially designed and machined flow channel structures to form the motor cooling channel 642. Likewise, by providing a second bearing cooling channel 643, including a third gap 6431 between the second bearing support 52 and the second air bearing 42, the cooling of the second bearing support 52 and the second air bearing 42 by the cooling gas can be at least partially achieved using the existing structure and relationships within the compressor, eliminating or reducing the need for specially designed and machined flow channel structures to form the second bearing cooling channel 642.

[0056] like Figures 1 to 3 As shown, in some embodiments of the compressor, the cooling channel 64 further includes: a first gas inlet channel 644 disposed between the first cooling gas inlet 61 and the first bearing cooling channel 641; and / or a second gas inlet channel 645 disposed between the second cooling gas inlet 62 and the motor cooling channel 642; and / or a connecting channel 646 disposed between the motor cooling channel 642 and the second bearing cooling channel 643; and / or a gas outlet channel 647 disposed between the second bearing cooling channel 643 and the cooling gas outlet 63.

[0057] By setting up a first gas inlet channel 644, the first cooling gas inlet 61 is connected to the first bearing cooling channel 641, allowing the cooling fluid to flow from the first cooling gas inlet 61 to the first bearing cooling channel 641 according to the designed flow path. This facilitates the orderly flow of cooling gas, ensuring that the cooling gas entering the first bearing cooling channel 641 meets the parameter requirements for cooling the first air bearing 41. By setting up a second gas inlet channel 645, the second cooling gas inlet 62 is connected to the motor cooling channel 642, allowing the cooling gas to flow from the second cooling gas inlet 62 to the motor cooling channel 642 according to the designed path. This also facilitates the orderly flow of cooling gas, ensuring that the cooling gas entering the motor cooling channel 642 meets the parameter requirements for cooling the motor stator 2 and / or the motor rotor 3. By setting up a connecting channel 646, the motor cooling channel 642 is connected to the second bearing cooling channel 643, allowing the cooling gas to flow from the motor cooling channel 642 to the second bearing cooling channel 643 according to the designed path. This also facilitates the orderly flow of cooling gas, ensuring that the cooling gas entering the second bearing cooling channel 643 meets the parameter requirements for cooling the second air bearing 42. By setting up a gas outlet channel 647, the second bearing cooling channel 643 is connected to the cooling gas outlet 63, which facilitates the timely discharge of cooling gas from the mounting cavity 11.

[0058] like Figures 1 to 3 As shown, in some embodiments of the compressor, the first gas inlet channel 644 includes a housing inlet section 6441 disposed within the housing wall of the housing 1 and / or a support inlet section 6442 disposed within the first bearing support 51 and / or a spacer inlet section 6443 disposed between the first bearing support 51 and the motor rotor 3; and / or the second gas inlet channel 645 includes a first spacer 6451 disposed between the first bearing support 51 and the motor stator 2 and / or a second spacer 6452 disposed between the first air bearing 41 and the motor stator 2; and / or The connecting channel 646 may include a third interval 6461 disposed between the motor stator 2 and the second bearing support 52 and / or an interval connecting section 6462 disposed between the second bearing support 52 and the motor rotor 3; and / or the compressor may also include an end plate 7 disposed at the end of the second bearing support 52 away from the first bearing support 51, the end plate 7 being fixed to the housing 1, and the gas outlet channel 647 may include a fourth interval 6471 disposed between the second air bearing 42 and the end plate 7 and / or a fifth interval 6472 disposed between the second bearing support 52 and the end plate 7.

[0059] By providing a first gas inlet channel 644 including a housing inlet section 6441 and / or a support inlet section 6442 and / or a spacer inlet section 6443, cooling gas is introduced into the upstream of the first gap 6411 through the housing inlet section 6441 and / or the support inlet section 6442 and / or the spacer inlet section 6443. The housing inlet section 6441 and / or the support inlet section 6442 prevent the cooling gas from entering the mounting cavity 11 as much as possible before entering the first bearing cooling channel 641, so that the cooling gas can maintain its cooling capacity as much as possible before entering the first bearing cooling channel 641. The spacer inlet section 6443 utilizes the existing structure and the relationship between the structures in the compressor to guide the cooling gas, which helps to simplify the structure of the first gas inlet channel 644. By setting a second gas inlet channel 645 including a first interval 6451 and a second interval 6452, cooling gas is realized to enter the downstream of the first bearing cooling channel 641 and the upstream of the motor cooling channel 642 through the second cooling gas inlet 62, the first interval 6451, and the second interval 6452. The first interval 6451 and the second interval 6452 utilize the existing structure and the relationship between the structures in the compressor to guide the cooling gas, which helps to simplify the structure of the second gas inlet channel 645. At the same time, the cooling fluid entering the first interval 6451 and the second interval 6452 also partially cools the motor stator 2. When the motor cooling channel 642 includes a second gap 6421 between the motor stator 2 and the motor rotor 3, it is beneficial for the cooling gas to flow uniformly from one end of the second gap 6421 to the other end in 360 degrees, which is beneficial for the uniform cooling of the motor stator 2 and the motor rotor 3 and improves the cooling effect. By providing a connecting channel 646 including a third interval 6461 and an interval connecting section 6462, cooling gas is conveyed from the motor cooling channel 642 to the second bearing cooling channel 643 via the third interval 6461 and the interval connecting section 6462. The third interval 6461 and the interval connecting section 6462 utilize the existing structure and structural relationships within the compressor to guide the cooling gas, simplifying the structure of the connecting channel 646. Simultaneously, the cooling fluid entering the third interval 6461 also partially cools the motor stator 2. By providing a gas outlet channel 647 including a fourth interval 6471 and a fifth interval 6472, cooling gas flows from the cooling gas outlet 63 out of the cooling channel 64 via the fourth interval 6471 and the fifth interval 6472. The fourth interval 6471 and the fifth interval 6472 utilize the existing structure and structural relationships within the compressor to guide the cooling gas, simplifying the structure of the connecting channel 646.

[0060] like Figures 1 to 3As shown, in some embodiments of the compressor, the housing inlet section 6441 includes a first axial channel 64411 and a first radial channel 64412. The first axial channel 64411 extends axially along the housing 1, and its two ends are respectively connected to the first cooling gas inlet 61 and the first radial channel 64412. The first radial channel 64412 extends radially along the housing 1, and its end away from the first axial channel 64411 is connected to the support inlet section 6442; and / or the support inlet section 6442 includes a second radial channel 64421, a second axial channel 64422, and a third radial channel 64423. The second radial channel 64421 extends radially along the housing 1, and its two ends are respectively connected to the housing inlet section 6441 and the second axial channel 64412. 4422 connection, the second axial channel 64422 extends axially along the housing 1, one end of the second axial channel 64422 away from the second radial channel 64421 is connected to the third radial channel 64423, the third radial channel 64423 extends radially along the housing 1, one end of the third radial channel 64423 away from the second axial channel 64422 is connected to the spacer introduction section 6443; and / or the spacer introduction section 6443 includes a first annular channel 64431, the two ends of the first annular channel 64431 along the axial direction of the housing 1 are respectively connected to the support introduction section 6442 and the first bearing cooling channel 641; and / or the spacer connection section 6462 includes a second annular channel 64621, the two ends of the second annular channel 64621 along the axial direction of the housing 1 are respectively connected to the third spacer 6461 and the second bearing cooling channel 643.

[0061] By providing a housing inlet section 6441 including a first axial channel 64411 and a first radial channel 64412, the first cooling gas inlet 61 is connected to the support inlet section 6442. The first axial channel 64411 and the first radial channel 64412 are easy to process, thus the housing inlet section 6441 is easy to implement and easy to align and connect with the support inlet section 6442 during assembly. By providing a support inlet section 6442 including a second radial channel 64421, a second axial channel 64422, and a third radial channel 64423, the housing inlet section 6441 is connected to the spacer inlet section 6443. The second radial channel 64421, the second axial channel 64422, and the third radial channel 64423 are easy to process, thus the support inlet section 6442 is easy to implement. By setting an intermittent inlet section 6443 including a first annular channel 64431, the support inlet section 6442 is connected to the first bearing cooling channel 641. The intermittent inlet section 6443 is simple to set and easy to manufacture. When the first bearing cooling channel 641 includes a first gap 6411, the intermittent inlet section 6443 also facilitates the uniform 360-degree flow of cooling gas from one end of the first gap 6411 to the other end, which is beneficial for the uniform cooling of the first air bearing 41 and improves the cooling effect. By setting an intermittent connecting section 6462 including a second annular channel 64621, the third gap 6461 and the second bearing cooling channel 643 are connected. The intermittent connecting section 6462 is simple to set and easy to manufacture. When the second bearing cooling channel 643 includes a third gap 6431, the second annular channel 64621 facilitates the uniform 360-degree flow of cooling gas from one end of the third gap 6431 to the other end, which is beneficial for the uniform cooling of the second air bearing 42 and improves the cooling effect.

[0062] The refrigerant circulation loop of this application includes the compressor of this application.

[0063] The refrigerant circulation loop of this application embodiment has the same advantages as the compressor of this application embodiment.

[0064] The cooling method of the compressor based on the embodiments of this application includes introducing cooling gas into the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 to cool the first air bearing 41 and the second air bearing 42.

[0065] Since cooling gas is introduced from outside the compressor through the first cooling gas inlet 61 and the second cooling gas inlet 62, and the cooling gas flows out to the outside of the compressor after achieving its cooling function through the cooling channel 64, the parameters such as temperature, pressure and flow rate of the cooling gas are basically unaffected by the compressor's own operating state. This facilitates effective and stable cooling of the first air bearing 41 and the second air bearing 42, thereby improving the reliability of the air bearing structure and extending the service life of the compressor.

[0066] In some embodiments of the compressor cooling method, the cooling method further includes adjusting the parameters of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62.

[0067] The parameters of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 are adjusted so that the parameters of the cooling gas entering the cooling channel 64 can better meet the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42.

[0068] In some embodiments of the compressor cooling method, adjusting the parameters of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 includes: adjusting the temperature of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62; and / or adjusting the flow rate of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62; and / or adjusting the pressure of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62.

[0069] The temperature of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 is adjusted so that the temperature of the cooling gas entering the cooling channel 64 is more in line with the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42. The flow rate of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 is adjusted so that the flow rate of the cooling gas entering the cooling channel 64 is more in line with the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42. The pressure of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 is adjusted so that the pressure of the cooling gas entering the cooling channel 64 is more in line with the cooling requirements, thereby facilitating more effective cooling of the first air bearing 41 and the second air bearing 42.

[0070] In some embodiments of the compressor cooling method, the cooling method further includes adjusting the parameters of the cooling gas entering the cooling channel 64 through at least one of the first cooling gas inlet 61 and the second cooling gas inlet 62 so that the temperature difference between the first air bearing 41 and the second air bearing 42 is less than a preset difference.

[0071] By reasonably controlling the parameters of the cooling gas, the first air bearing 41 and the second air bearing 42 can be controlled to operate at a reasonable temperature difference. This ensures that the thickness of the air film between the first air bearing 41 and the first bearing support 51 is approximately the same as the thickness of the air film between the second air bearing 42 and the second bearing support 52, improving the operational reliability of the air bearings, facilitating the smooth operation of the motor rotor 3, and thus extending the service life of the compressor. The preset difference is, for example, a value within 5°C.

[0072] In some embodiments of the compressor cooling method, the cooling channel 64 includes: a first bearing cooling channel 641 configured to cool a first air-bearing bearing 41; a motor cooling channel 642 configured to cool a motor stator 2 and / or a motor rotor 3; and a second bearing cooling channel 643 configured to cool a second air-bearing bearing 42; the cooling method includes: causing cooling gas entering the cooling channel 64 through a first cooling gas inlet 61 to sequentially pass through the first bearing cooling channel 641, the motor cooling channel 642, and the second bearing cooling channel 643; and / or causing cooling gas entering the cooling channel 64 through a second cooling gas inlet 62 to sequentially pass through the motor cooling channel 642 and the second bearing cooling channel 643.

[0073] The cooling gas entering the cooling channel 64 through the first cooling gas inlet 61 passes sequentially through the first bearing cooling channel 641, the motor cooling channel 642, and the second bearing cooling channel 643, thus completing the cooling of these channels and fully utilizing the cooling capacity of the gas entering the cooling channel 644 through the first cooling gas inlet 61. Similarly, the cooling gas entering the cooling channel 64 through the second cooling gas inlet 62 passes sequentially through the motor cooling channel 642 and the second bearing cooling channel 643, effectively supplementing the cooling capacity of the gas entering the cooling channel 644 through the first cooling gas inlet 61. This ensures that the motor stator 2 and / or the motor rotor 3 and the second air bearing 42 are also adequately cooled.

[0074] In some embodiments of the compressor cooling method, the pressure of the cooling gas entering the second cooling gas inlet 62 is lower than the pressure of the cooling gas entering the first cooling gas inlet 61.

[0075] By controlling the pressure of the cooling gas entering the second cooling gas inlet 62 to be lower than the pressure of the cooling gas entering the first cooling gas inlet 61, a certain pressure difference is created between the two ends of the first bearing cooling channel 641. This allows the cooling gas entering the first bearing cooling channel 641 from the first cooling gas inlet 61 to cool the first air bearing 41 and flow downstream of the first bearing cooling channel 641, thereby cooling the first air bearing 41. The cooling gas also merges with the cooling gas entering the cooling channel 64 from the second cooling gas inlet 62 and continues to flow downstream to cool the motor stator 2, the motor rotor 3, and the second air bearing 42.

[0076] In some embodiments of the compressor cooling method, the pressure of the cooling gas input into the second cooling gas inlet 62 is 50% to 80% of the pressure of the cooling gas input into the first cooling gas inlet 61.

[0077] By controlling the pressure of the cooling gas entering the second cooling gas inlet 62 and the pressure of the cooling gas entering the first cooling gas inlet 61 within a suitable range, it is more conducive for the cooling gas to flow along a predetermined flow path after entering the cooling channel 64 from the first cooling gas inlet 61 and the second cooling gas inlet 62, thereby smoothly achieving the cooling of the first air bearing 41, the motor stator 2, the motor rotor 3 and the second air bearing 42.

[0078] The following combination Figures 1 to 3 A compressor according to an embodiment of this application will be described in more detail.

[0079] like Figures 1 to 3 As shown, the compressor in this embodiment includes a housing 1, a motor stator 2, a motor rotor 3, an end plate 7, a first air bearing 41, a second air bearing 42, a first bearing support 51, a second bearing support 52, and an air bearing cooling section 6. The compressor also includes two impellers (not shown) respectively disposed at both ends of the motor rotor 3 as compression units. The high-pressure stage impeller is disposed at the outer end of the motor rotor 3 located at the first air bearing 41, and the low-pressure stage impeller is disposed at the outer end of the motor rotor 3 located at the second air bearing 42.

[0080] The housing 1 has a mounting cavity 11. The motor stator 2 is disposed within the mounting cavity 11 and has mounting holes 21. The motor rotor 3 is rotatably disposed within the mounting holes 21 of the motor stator 2. A first air bearing 41 and a second air bearing 42 are respectively sleeved on both axial ends of the motor rotor 3 to support the rotation of the motor rotor 3 relative to the motor stator 2. A first bearing support 51 and a second bearing support 52 are fixedly disposed relative to the housing 1, and the first air bearing 41 and the second air bearing 42 are respectively disposed within the first bearing support 51 and the second bearing support 52. An end plate 7 is disposed at the end of the second bearing support 52 away from the first bearing support 51, and the end plate 7 is fixed to the housing 1.

[0081] like Figure 3 As shown, the air bearing cooling unit 6 includes a first cooling gas inlet 61, a second cooling gas inlet 62, a cooling gas outlet 63, a cooling flow channel 64, a parameter adjustment device, a first temperature detection device, a second temperature detection device, and a control device. The parameter adjustment device includes a temperature adjustment device, a flow rate adjustment device, and a pressure adjustment device. The control device is signal-connected to the first temperature detection device, the second temperature detection device, and the temperature adjustment device, flow rate adjustment device, and pressure adjustment device of the parameter adjustment device.

[0082] The first cooling gas inlet 61, the second cooling gas inlet 62, and the cooling gas outlet 63 are located on the shell wall of the housing 1 to communicate with the outside of the housing 1.

[0083] The temperature regulating device includes a first temperature regulating unit and a second temperature regulating unit, which are respectively configured to regulate the temperature of the cooling gas entering the mounting cavity 11 through the first cooling gas inlet 61 and the second cooling gas inlet 62. The flow regulating device includes a first flow regulating unit and a second flow regulating unit, which are respectively configured to regulate the flow rate of the cooling gas entering the mounting cavity 11 through the first cooling gas inlet 61 and the second cooling gas inlet 62. The pressure regulating device includes a first pressure regulating unit and a second pressure regulating unit, which are respectively configured to regulate the pressure of the cooling gas entering the mounting cavity 11 through the first cooling gas inlet 61 and the second cooling gas inlet 62. The control device is signal-connected to the first temperature regulating unit, the second temperature regulating unit, the first flow regulating unit, the second flow regulating unit, the first pressure regulating unit, and the second pressure regulating unit. Both the first temperature regulating unit and the second temperature regulating unit are configured as heat exchangers, both the first flow regulating unit and the second flow regulating unit are configured as flow regulating valves, and both the first pressure regulating unit and the second pressure regulating unit are configured as pressure reducing valves.

[0084] The cooling channel 64 connects the first cooling gas inlet 61, the second cooling gas inlet 62 and the cooling gas outlet 63, and is configured to cool the first air bearing 41, the second air bearing 42, the motor stator 2 and the motor rotor 3.

[0085] The cooling channel 64 includes a first gas inlet channel 644, a second gas inlet channel 645, a first bearing cooling channel 641, a motor cooling channel 642, a second bearing cooling channel 643, a connecting channel 646, and a gas outlet channel 647, arranged sequentially along the flow direction of the cooling gas. The first gas inlet channel 644 is connected to the first cooling gas inlet 61. The second gas inlet channel 645 is connected to the second cooling gas inlet 62 and is connected between the first bearing cooling channel 641 and the motor cooling channel 642. The gas outlet channel 647 is connected to the cooling gas outlet 63.

[0086] The first gas inlet channel 644 is disposed between the first cooling gas inlet 61 and the first bearing cooling channel 641, and includes a housing inlet section 6441 disposed within the housing wall of the housing 1, a support inlet section 6442 disposed within the first bearing support 51, and a spacer inlet section 6443 disposed between the first bearing support 51 and the motor rotor 3. The housing inlet section 6441 includes a first axial channel 64411 and a first radial channel 64412. The support inlet section 6442 includes a second radial channel 64421, a second axial channel 64422, and a third radial channel 64423. The spacer inlet section 6443 includes a first annular channel 64431.

[0087] The first axial channel 64411 extends axially along the housing 1. Both ends of the first axial channel 64411 are connected to the first cooling gas inlet 61 and the first radial channel 64412, respectively. The first radial channel 64412 extends radially along the housing 1. The end of the first radial channel 64412 away from the first axial channel 64411 is connected to the second radial channel 64421 of the support inlet section 6442. The second radial channel 64421 extends radially along the housing 1. Both ends of the second radial channel 64421 are connected to the first radial channel 64412 and the second axial channel 64422 of the housing inlet section 6441, respectively. The second axial channel 64422 extends axially along the housing 1. The end of the second axial channel 64422 away from the second radial channel 64421 is connected to the third radial channel 64423. The third radial channel 64423 extends radially along the housing 1. The end of the third radial channel 64423 away from the second axial channel 64422 is connected to the first annular channel 64431 of the spacer inlet section 6443. The first annular channel 64431 is connected at both ends along the axial direction of the housing 1 to the third radial channel 64423 of the support introduction section 6442 and the first bearing cooling channel 641, respectively.

[0088] The first bearing cooling channel 641 includes a first gap 6411 between the first bearing support 51 and the first air bearing 41, and is configured to cool the first air bearing 41. One end of the first gap 6411 is connected to the first annular channel 64431, and the other end is connected to the second gas introduction channel 645.

[0089] The second gas inlet channel 645 is disposed between the second cooling gas inlet 62 and the motor cooling channel 642. The second gas inlet channel 645 includes a first spacer 6451 disposed between the first bearing support 51 and the motor stator 2 and a second spacer 6452 disposed between the first air bearing 41 and the motor stator 2.

[0090] The motor cooling channel 642 includes a second gap 6421 between the motor stator 2 and the motor rotor 3, configured to cool the motor stator 2 and the motor rotor 3. A connecting channel 646 is disposed between the motor cooling channel 642 and the second bearing cooling channel 643. The connecting channel 646 includes a third gap 6461 disposed between the motor stator 2 and the second bearing support 52, and a spacer connecting section 6462 disposed between the second bearing support 52 and the motor rotor 3. The spacer connecting section 6462 includes a second annular channel 64621, the two ends of which are connected to the third gap 6461 and the second bearing cooling channel 643 along the axial direction of the housing 1, respectively.

[0091] The second bearing cooling channel 643 includes a third gap 6431 between the second bearing support 52 and the second air bearing 42, and is configured to cool the second air bearing 42.

[0092] A gas outlet channel 647 is disposed between the second bearing cooling channel 643 and the cooling gas outlet 63. The gas outlet channel 647 includes a fourth spacer 6471 disposed between the second air bearing 42 and the end plate 7 and a fifth spacer 6472 disposed between the second bearing support 52 and the end plate 7.

[0093] The cooling process of the first air bearing 41, motor stator 2, motor rotor 3 and second air bearing 42 of the compressor according to an embodiment of this application will be described below.

[0094] Cooling gas enters the cooling channel 64 through the first cooling gas inlet 61 and the second cooling gas inlet 62. By adjusting the first pressure regulating unit and the second pressure regulating unit, the pressure of the cooling gas entering the second cooling gas inlet 62 is made to be 50% to 80% of the pressure of the cooling gas entering the first cooling gas inlet 61. The cooling gas entering the cooling channel 64 through the first cooling gas inlet 61 passes sequentially through the first gap 6411 of the first bearing cooling channel 641, the second gap 6421 of the motor cooling channel 642, and the third gap 6431 of the second bearing cooling channel 643 to cool the first air bearing 41, the motor stator 2, the motor rotor 3, and the second air bearing 42. Similarly, the cooling gas entering the cooling channel 64 through the second cooling gas inlet 62 passes sequentially through the second gap 6421 of the motor cooling channel 642 and the third gap 6431 of the second bearing cooling channel 643 to cool the motor stator 2, the motor rotor 3, and the second air bearing 42. The two cooling gases, entering the cooling channel 64 from the first cooling gas inlet 61 and the second cooling gas inlet 62 respectively, converge at the connection between the first gap 6411 and the second gap 6421, and then sequentially pass through the second gap 6421, the connecting channel 646, the third gap 6431, and the outlet channel 647, finally exiting the compressor through the cooling gas outlet 63. While passing through the second gap 6421, they jointly cool the motor stator 2 and the motor rotor 3; while passing through the third gap 6431, they jointly cool the second air bearing 42. By adjusting at least a portion of the first pressure regulating unit, the second pressure regulating unit, the first temperature regulating unit, the second temperature regulating unit, the first flow regulating unit, and the second flow regulating unit, the temperatures of the first air bearing 41 and the second air bearing 42 are kept within a predetermined difference, for example, the first air bearing 41 and the second air bearing 42 are kept at approximately the same temperature, thereby ensuring that the thickness of the air film between the first air bearing 41 and the first bearing support 51 and the thickness of the air film between the second air bearing 42 and the second bearing support 52 are approximately the same.

[0095] Those skilled in the art will understand that, in the methods described in the specific embodiments, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0096] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A compressor, characterized in that, include: The housing (1) has a mounting cavity (11); The motor stator (2) is disposed in the mounting cavity (11) and has mounting holes (21); The motor rotor (3) is rotatably disposed within the mounting hole (21); The first air bearing (41) and the second air bearing (42) are respectively sleeved on both ends of the motor rotor (3) to support the rotation of the motor rotor (3) relative to the motor stator (2); A first bearing support (51) and a second bearing support (52) are fixedly disposed relative to the housing (1), and the first air bearing (41) and the second air bearing (42) are respectively disposed within the first bearing support (51) and the second bearing support (52); and The air bearing cooling section (6) includes a first cooling gas inlet (61), a second cooling gas inlet (62), a cooling gas outlet (63), and a cooling channel (64) connecting the first cooling gas inlet (61), the second cooling gas inlet (62), and the cooling gas outlet (63). The first cooling gas inlet (61), the second cooling gas inlet (62), and the cooling gas outlet (63) are located on the shell wall of the housing (1) to communicate with the outside of the housing (1). The cooling channel (64) is disposed in the mounting cavity (11) and is configured to cool the first air bearing (41) and the second air bearing (42).

2. The compressor according to claim 1, characterized in that, The air bearing cooling section (6) includes a parameter adjustment device configured to adjust the parameters of the cooling gas entering the cooling channel (64) from at least one of the first cooling gas inlet (61) and the second cooling gas inlet (62).

3. The compressor according to claim 2, characterized in that, The parameter adjustment device includes: a temperature adjustment device configured to adjust the temperature of the cooling gas entering the cooling channel (64) through at least one of the first cooling gas inlet (61) and the second cooling gas inlet (62); and / or A flow regulating device is configured to regulate the flow rate of cooling gas entering the cooling channel (64) through at least one of the first cooling gas inlet (61) and the second cooling gas inlet (62); and / or The pressure regulating device is configured to regulate the pressure of the cooling gas entering the cooling channel (64) through at least one of the first cooling gas inlet (61) and the second cooling gas inlet (62).

4. The compressor according to claim 3, characterized in that, The temperature regulating device includes a first temperature regulating unit configured to regulate the temperature of the cooling gas entering the cooling channel (64) through the first cooling gas inlet (61); and / or The temperature regulating device includes a second temperature regulating unit configured to regulate the temperature of the cooling gas entering the cooling channel (64) through the second cooling gas inlet (62); and / or The flow regulating device includes a first flow regulating unit, which is configured to regulate the flow rate of cooling gas entering the cooling channel (64) through the first cooling gas inlet (61); and / or The flow regulating device includes a second flow regulating section configured to regulate the temperature of the cooling gas entering the cooling channel (64) through the second cooling gas inlet (62); and / or The pressure regulating device includes a first pressure regulating section configured to regulate the pressure of the cooling gas entering the cooling channel (64) through the first cooling gas inlet (61); and / or The pressure regulating device includes a second pressure regulating section configured to regulate the pressure of the cooling gas entering the cooling channel (64) through the second cooling gas inlet (62).

5. The compressor according to any one of claims 2 to 4, characterized in that, Also includes: The first temperature detection device and the second temperature detection device are configured to detect the first temperature of the first air bearing (41) and the second temperature of the second air bearing (42), respectively. and The control device is signal-connected to the first temperature detection device, the second temperature detection device, and the parameter adjustment device, and is configured to control the operation of the parameter adjustment device according to the first temperature and the second temperature.

6. The compressor according to any one of claims 1 to 4, characterized in that, The cooling channel (64) includes: A first bearing cooling channel (641) is configured to cool the first air bearing (41); and / or Motor cooling passage (642) is configured to cool the motor stator (2) and / or the motor rotor (3); and / or The second bearing cooling channel (643) is configured to cool the second air bearing (42).

7. The compressor according to claim 6, characterized in that, The cooling channels include the first bearing cooling channel (641), the motor cooling channel (642), and the second bearing cooling channel (643), which are arranged sequentially along the flow direction of the cooling gas.

8. The compressor according to claim 6, characterized in that, Along the flow direction of the cooling gas, the first cooling gas inlet (61) is located upstream of the first bearing cooling channel (641), and the second cooling gas inlet (62) is located between the first bearing cooling channel (641) and the motor cooling channel (642).

9. The compressor according to claim 6, characterized in that, The first bearing cooling channel (641) includes a first gap (6411) between the first air bearing (41) and the motor rotor (3); and / or The motor cooling channel (642) includes a second gap (6421) between the motor stator (2) and the motor rotor (3); and / or The second bearing cooling channel (643) includes a third gap (6431) between the second air bearing (42) and the motor rotor (3).

10. The compressor according to claim 6, characterized in that, The cooling channel further includes: A first gas inlet channel (644) is disposed between the first cooling gas inlet (61) and the first bearing cooling channel (641); and / or A second gas inlet channel (645) is disposed between the second cooling gas inlet (62) and the motor cooling channel (642); and / or A connecting channel (646) is disposed between the motor cooling channel (642) and the second bearing cooling channel (643); and / or A gas outlet channel (647) is provided between the second bearing cooling channel (643) and the cooling gas outlet (63).

11. The compressor according to claim 10, characterized in that, The first gas inlet channel (644) includes a housing inlet section (6441) disposed within the housing wall of the housing (1) and / or a support inlet section (6442) disposed within the first bearing support (51) and / or a spacer inlet section (6443) disposed between the first bearing support (51) and the motor rotor (3); and / or The second gas inlet channel (645) includes a first gap (6451) disposed between the first bearing support (51) and the motor stator (2) and / or a second gap (6452) disposed between the first air bearing (41) and the motor stator (2); and / or The connecting channel (646) includes a third interval (6461) disposed between the motor stator (2) and the second bearing support (52) and / or an interval connecting section (6462) disposed between the second bearing support (52) and the motor rotor (3); and / or The compressor further includes an end plate (7) disposed on the second bearing support (52) at the end away from the first bearing support (51), the end plate (7) being fixed to the housing (1), and the gas outlet channel (647) including a fourth interval (6471) disposed between the second air bearing (42) and the end plate (7) and / or a fifth interval (6472) disposed between the second bearing support (52) and the end plate (7).

12. The compressor according to claim 11, characterized in that, The housing inlet section (6441) includes a first axial channel (64411) and a first radial channel (64412). The first axial channel (64411) extends axially along the housing (1), and its two ends are connected to the first cooling gas inlet (61) and the first radial channel (64412), respectively. The first radial channel (64412) extends radially along the housing (1), and one end of the first radial channel (64412) away from the first axial channel (64411) is connected to the support inlet section (6442); and / or The support introduction section (6442) includes a second radial channel (64421), a second axial channel (64422), and a third radial channel (64423). The second radial channel (64421) extends radially along the housing (1). Both ends of the second radial channel (64421) are connected to the housing introduction section (6441) and the second axial channel (64422), respectively. The second axial channel (64422) extends axially along the housing (1). One end of the second axial channel (64422) away from the second radial channel (64421) is connected to the third radial channel (64423). The third radial channel (64423) extends radially along the housing (1). One end of the third radial channel (64423) away from the second axial channel (64422) is connected to the spacer introduction section (6443); and / or The spacer inlet section (6443) includes a first annular channel (64431), the first annular channel (64431) being connected at both ends along the axial direction of the housing (1) to the support inlet section (6442) and the first bearing cooling channel (641), respectively; and / or The spacer connection section (6462) includes a second annular channel (64621), which is connected to the third spacer (6461) and the second bearing cooling channel (643) at both ends along the axial direction of the housing (1).

13. A refrigerant circulation loop, characterized in that, The compressor includes any one of claims 1 to 12.

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