Motor cooling system and refrigeration system of air suspension compressor

Abstract

The present application relates to the field of refrigeration technology, and discloses a motor cooling system for an air-suspended compressor, comprising: a gas bearing air supply unit, comprising an air supply tank, the air supply tank comprising a refrigerant inlet, a gas outlet and a liquid refrigerant outlet; the refrigerant inlet is connected to the refrigerant in the refrigeration system where the compressor is located; the gas outlet is connected to the air supply port of the gas bearing of the compressor; a first pipeline, two ports of which are respectively connected to the liquid refrigerant outlet of the air supply tank and the motor coolant supply port of the compressor. The disclosed embodiment realizes that the motor coolant of the air-suspended compressor is provided by the air supply tank in the gas bearing air supply unit, which increases the amount of refrigerant required in the air supply tank, thereby increasing the flow rate of the liquid supply pump, reducing the start-stop frequency, and improving the life. At the same time, the coolant supply pipeline is simplified, the refrigerant loss is reduced, and the cost is reduced. The present application also discloses a refrigeration system.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, for example, to a motor cooling system and a refrigeration system of an air suspension compressor. Background Art

[0002] At present, in refrigeration systems using air-suspended compressors (for example, air-suspended centrifugal compressors), the air supply method for the gas bearings of the compressors is mostly: the refrigerant in the refrigeration cycle pipeline of the refrigeration system is pumped into the gas supply tank through the pipeline by a liquid supply pump, and the refrigerant is heated at high temperature in the gas supply tank and evaporated into a high-pressure gaseous refrigerant, which is discharged from the gas supply tank and directly sent to the gas bearing gap of the compressor through the pipeline to support the rotor. Among them, the pressurization principle of the gas supply tank is: the heating pipe in the gas supply tank is controlled by electric energy to heat up, and the liquid refrigerant in the gas supply tank is heated, so that the refrigerant evaporates and becomes a high-pressure gas, which is discharged from the top of the gas supply tank and sent to the gas bearing gap of the compressor through the pipeline.

[0003] In the process of implementing the embodiments of the present disclosure, it was found that there are at least the following problems in the related art: since the gas required for the gas bearing of the air suspension compressor is limited, there is no need to continuously pump refrigerant into the gas supply tank, resulting in frequent starting and stopping of the liquid supply pump and a reduced lifespan. Summary of the invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The disclosed embodiments provide a motor cooling system and a refrigeration system for an air suspension compressor to solve the problem that the gas required for the gas bearing of the existing air suspension compressor is limited and there is no need to continuously pump refrigerant into the gas supply tank, resulting in frequent starts and stops of the liquid supply pump and a reduced lifespan.

[0006] In some embodiments, the motor cooling system of the air suspension compressor includes:

[0007] The gas bearing gas supply unit comprises a gas supply tank, the gas supply tank comprises a refrigerant inlet, a gas outlet and a liquid refrigerant outlet; the refrigerant inlet is connected to the refrigerant in the refrigeration system where the compressor is located; the gas outlet is communicated with the gas supply port of the gas bearing of the compressor;

[0008] The first pipeline has two ports which are respectively connected with the liquid refrigerant outlet of the gas supply tank and the motor coolant supply port of the compressor.

[0009] In some embodiments, the refrigeration system includes the aforementioned motor cooling system of the air suspension compressor.

[0010] The motor cooling system and refrigeration system of the air suspension compressor provided in the embodiments of the present disclosure can achieve the following technical effects:

[0011] In the motor cooling system of the air suspension compressor of the disclosed embodiment, a liquid refrigerant outlet is newly added to the air supply tank, and the liquid refrigerant in the air supply tank is supplied to the motor of the air suspension compressor as motor coolant through the first pipeline. The motor coolant of the air suspension compressor is provided by the air supply tank in the gas bearing air supply unit, which increases the amount of refrigerant required in the air supply tank, thereby increasing the flow rate of the liquid supply pump, reducing the start-stop frequency, and improving the life. At the same time, the coolant supply pipeline is simplified, the refrigerant loss is reduced, and the cost is reduced.

[0012] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0014] Figure 1 is a structural schematic diagram of a refrigeration system including a motor cooling system of an air suspension compressor provided in an embodiment of the present disclosure;

[0015] Figure 2 is a structural schematic diagram of another refrigeration system of a motor cooling system including an air suspension compressor provided in an embodiment of the present disclosure;

[0016] Figure 3 is a structural schematic diagram of another refrigeration system of a motor cooling system including an air suspension compressor provided in an embodiment of the present disclosure;

[0017] Reference numerals:

[0018] 110, gas supply tank; 111, gas outlet; 112, liquid refrigerant outlet; 113, liquid refrigerant inlet; 114, gas refrigerant inlet; 120, second pipeline; 121, pumping device; 122, first filtering device; 123, first one-way valve; 130, third pipeline; 131, second flow control device; 132, second filtering device; 133, second one-way valve; 141, second pressure monitoring device; 142, second temperature monitoring device; 143, first Second flow monitoring device; 144, third pressure monitoring device; 145, third temperature monitoring device; 146, third flow monitoring device; 200, first pipeline; 210, first flow control device; 220, liquid supply pump; 230, first pressure monitoring device; 240, first temperature monitoring device; 250, first flow monitoring device; 300, refrigeration system; 310, compressor; 311, exhaust port; 320, condenser; 330, throttling device; 340, evaporator. DETAILED DESCRIPTION

[0019] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0020] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0021] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0022] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0023] Unless otherwise stated, the term "plurality" means two or more.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0025] Combination Figure 1-3 As shown, the embodiment of the present disclosure provides a motor cooling system for an air suspension compressor, including a gas bearing air supply unit and a first pipeline 200. The gas bearing air supply unit includes an air supply tank 110, which includes a refrigerant inlet, a gas outlet 111 and a liquid refrigerant outlet 112; the refrigerant inlet is connected to the refrigerant in the refrigeration system where the compressor 310 is located. The two ports of the first pipeline 200 are respectively connected to the liquid refrigerant outlet 112 of the air supply tank 110 and the motor coolant supply port of the compressor 310.

[0026] In the motor cooling system of the air suspension compressor of the disclosed embodiment, a liquid refrigerant outlet 112 is newly added to the air supply tank 110, and the liquid refrigerant in the air supply tank 110 is supplied to the motor of the air suspension compressor as motor coolant through the first pipeline 200. The motor coolant of the air suspension compressor is provided by the air supply tank 110 in the gas bearing air supply unit, and the amount of refrigerant required in the air supply tank 110 is increased, thereby increasing the flow rate of the liquid supply pump 120 (i.e., the supply load), reducing the start-stop frequency, and improving the lifespan. This further improves the stability of the gas bearing air supply unit and the stability of the refrigeration system. At the same time, the coolant supply pipeline is simplified, the refrigerant loss is reduced, and the cost is reduced.

[0027] In the disclosed embodiment, the compressor 310 is an air-suspended compressor using a gas bearing, specifically, an air-suspended centrifugal compressor, wherein the type of the gas bearing is not limited.

[0028] In some embodiments, Figure 1 As shown, the motor cooling system also includes a first flow control device 210 and a liquid supply pump 220 . The first flow control device 210 is arranged on the first pipeline 200 ; and / or the liquid supply pump 220 is connected to the first pipeline 200 to provide power for the first pipeline 200 .

[0029] In this embodiment, the first flow control device 210 can throttle and cool the liquid refrigerant in the first pipeline 200 to achieve a better cooling effect. The liquid supply pump 220 is arranged on the first pipeline 200 to ensure that the liquid refrigerant in the gas supply tank 110 is supplied to the motor of the air suspension compressor. The specific type of pump body used by the liquid supply pump 220 is not limited, as long as it can supply fluid.

[0030] Optionally, the first flow control device 210 is an electronic expansion valve, which plays a throttling and cooling role on the liquid refrigerant in the first pipeline 200 .

[0031] In the disclosed embodiment, in the gas bearing gas supply unit, the gas supply tank 110 adds a liquid refrigerant outlet 112 on the basis of the existing refrigerant inlet and gas outlet 111, so as to supply cooling liquid to the motor of the compressor 310. In some embodiments, the liquid refrigerant outlet 112 is arranged at the bottom of the gas supply tank 11. It is not necessary to add components such as a liquid level sensor to ensure the supply of motor cooling liquid, thereby reducing energy consumption.

[0032] In some embodiments, the motor cooling system further includes a first fluid monitoring device, which is disposed on a pipeline at the motor coolant supply port of the compressor 310. That is, in the disclosed embodiment, the first fluid monitoring device is used to monitor the parameters of the refrigerant entering the motor of the compressor 310, so as to control the opening of the first flow control device 210 and / or the pumping power of the liquid supply pump 220 and other parameters, so as to supply the motor of the compressor 310 with a coolant having a suitable temperature, pressure, flow rate, etc.

[0033] Alternatively, if Figure 2 As shown, the first fluid monitoring device includes a first pressure monitoring device 230, a first temperature monitoring device 240 and a first flow monitoring device 250, all of which are arranged on the pipeline at the motor coolant supply port of the compressor 310. The pressure, temperature and flow of the refrigerant entering the motor of the compressor 310 are monitored.

[0034] In the disclosed embodiment, the refrigerant inlet of the gas supply tank 110 is connected to the refrigerant in the refrigeration system where the compressor 310 is located. At the initial start-up of the refrigeration system, the pressure of the gaseous refrigerant in the pipeline of the compressor's exhaust port is unstable, resulting in unstable operation of the gas suspension compressor. In view of this, at the initial start-up of the refrigeration system (start-up includes initial start-up or restart), if the gaseous refrigerant in the pipeline of the compressor's exhaust port is directly introduced, the pressure of the supplied gaseous refrigerant will be unstable, affecting the operation of the compressor.

[0035] In some embodiments, Figure 1As shown, the refrigerant inlet of the gas supply tank 110 includes a liquid refrigerant inlet 113; then, the gas bearing gas supply unit also includes a second pipeline 120 and a pumping device 121, and the two ports of the second pipeline 120 are respectively connected to the liquid refrigerant inlet 113 of the gas supply tank 110 and the condenser 320 in the refrigeration system where the compressor 310 is located. The pumping device 121 is connected to the second pipeline 120 to provide power for the second pipeline 120. During the operation of the refrigeration system, the high-temperature and high-pressure liquid refrigerant discharged from the condenser 320 is sent to the gas supply tank 110. In the gas supply tank 110, the liquid refrigerant is heated and evaporated into a gaseous refrigerant, and then discharged from the gas outlet 111 of the gas supply tank 110, which can provide a gas refrigerant with stable pressure for the gas bearing of the compressor 310, ensuring the stability of the compressor in the initial operation. Especially in the initial start-up of the refrigeration system, it can ensure that the gas refrigerant with stable pressure is provided for the gas bearing of the compressor 310, ensuring the stability of the compressor in the initial operation. At the same time, coolant can be provided to the compressor motor to ensure the cooling of the motor.

[0036] In this embodiment, the pumping device 121 can be a liquid supply pump or an air supply pump, without limitation, as long as the requirements for pumping liquid refrigerant are met. Optionally, the pumping device 121 is a compressor.

[0037] Alternatively, if Figure 2 As shown, the gas bearing air supply unit also includes a first filter device 122, which is arranged on the second pipeline 120 between the condenser 320 and the pumping device 121 to filter the refrigerant in the second pipeline 120. The first filter device 122 can be a conventional filter to filter out impurities in the liquid refrigerant.

[0038] Alternatively, if Figure 2 As shown, the gas bearing air supply unit further includes a first one-way valve 123 disposed on the second pipeline 120 to ensure no backflow. Optionally, the first one-way valve 123 is disposed on the second pipeline 120 between the pumping device 121 and the air supply tank 110 .

[0039] Optionally, the position of the liquid refrigerant outlet 112 is lower than the position of the liquid refrigerant inlet 113. The supply of liquid refrigerant is ensured.

[0040] When the refrigeration system is in a stable operation state, the pressure of the gaseous refrigerant in the pipeline of the exhaust port 311 of the compressor 310 is in a stable state. At this time, the gaseous refrigerant in the pipeline of the exhaust port 311 of the compressor 310 can be directly introduced into the gas supply tank 110 to reduce the energy consumption of the gas supply tank 110. Figure 3As shown, in some embodiments, the refrigerant inlet of the gas supply tank 110 further includes a gaseous refrigerant inlet 114; then, the gas bearing gas supply unit further includes a third pipeline 130 and a second flow control device 131, two ports of the third pipeline 130 are respectively connected to the gaseous refrigerant inlet 114 of the gas supply tank 110 and the pipeline at the exhaust port 311 of the compressor 310, and the second flow control device 131 is arranged on the third pipeline 130. By controlling the opening or closing of the second flow control device 131, it is controlled whether the gaseous refrigerant discharged from the exhaust port 311 of the compressor 310 is introduced into the gas supply tank 110.

[0041] Optionally, the second flow control device 131 is a control valve, such as an electric ball valve.

[0042] Alternatively, if Figure 3 As shown, the gas bearing gas supply unit further includes a second filter device 132, which is disposed on the third pipeline 130 and filters the refrigerant in the third pipeline 130. The second filter device 132 can be a cyclonic centrifugal device.

[0043] Alternatively, if Figure 3 As shown, the gas bearing gas supply unit further includes a second one-way valve 133, which is arranged on the third pipeline 130. The gaseous refrigerant in the third pipeline 130 is prevented from backflowing, and the gaseous refrigerant discharged from the exhaust port 311 of the compressor 310 flows to the gas supply tank 110, thereby preventing the gaseous refrigerant in the gas supply tank 110 from backflowing.

[0044] That is, in the gas bearing air supply unit of the embodiment of the present disclosure, the refrigerant supply method in the air supply tank 110 can have the following two methods: First, during the entire operation of the refrigeration system, the condenser 320 supplies liquid refrigerant to the air supply tank 110. Second, at the initial start-up of the refrigeration system, the condenser 320 supplies liquid refrigerant to the air supply tank 110; during the stable operation of the refrigeration system, while the condenser 320 supplies liquid refrigerant to the air supply tank 110, gaseous refrigerant is supplied to the air supply tank 110 from the exhaust port of the compressor 310. In the embodiment of the present disclosure, the refrigerant supply method of the air supply tank 110 in the gas bearing air supply unit can be determined according to actual conditions. Among them, in the second supply method, it can be achieved by controlling the pumping flow of the pumping device 121 and the opening or closing of the second flow control device 131 respectively by the controller.

[0045] Optionally, for the second supply mode, when the controller determines that the refrigeration system is started, the pumping device 121 is controlled to start, and the timing is simultaneously started; when the timing reaches the first set time, the air suspension compressor of the refrigeration system is controlled to start; when the timing reaches the second set time, the second flow control device 131 is controlled to start. The second supply mode is realized. The pumping rate of the pumping device 121 and the opening degree of the second flow control device 131 can be adjusted and determined according to actual conditions.

[0046] In this embodiment, the controller determines that the start-up time of the refrigeration system needs to be slightly earlier than the start-up time of the air suspension compressor in the actual control process to ensure that the gas supply tank 110 can provide stable high-pressure gas for the gas bearing of the air suspension compressor and ensure the stable operation of the air suspension compressor. That is, the first set time is determined by the time required for the gas supply tank 110 to provide gaseous refrigerant with stable air pressure in actual application. Optionally, the first set time is 5s to 15s. Optionally, the first set time is 5s to 8s.

[0047] In this embodiment, the second set time can be set according to the actual time required for the refrigeration system to enter stable operation from startup. Optionally, the second set time is 60s to 180s. Optionally, the second set time is 100s to 120s.

[0048] In some embodiments, Figure 2 As shown, the gas bearing air supply unit further includes a fluid monitoring device, which is respectively arranged on the gas supply tank 110 and the pipeline at the gas supply port of the gas bearing of the compressor 310. That is, in the embodiment of the present disclosure, the fluid monitoring device is used to monitor the parameters of the refrigerant on each pipeline section in the gas bearing air supply unit, so as to control the heating power of the gas supply tank 110.

[0049] In some embodiments, the fluid monitoring device may also be respectively disposed on the pipeline at the refrigerant inlet of the gas supply tank 110 and the pipeline at the gas outlet of the gas supply tank 110. By monitoring the parameters of the refrigerant entering the gas supply tank 110 and the parameters of the gaseous refrigerant flowing out of the gas supply tank 110, the heating power and other parameters of the gas supply tank 110 are determined.

[0050] Optionally, the fluid monitoring device includes a pressure monitoring device, a temperature monitoring device, and a flow monitoring device, etc., and one or more of them can be selected according to actual needs. When the type of refrigerant is determined, the saturated steam temperature T of the saturated steam under the current pressure can be obtained by querying the pressure-enthalpy diagram of the refrigerant according to the current pressure value P. 0 , when the current temperature T obtained by monitoring is greater than the saturated steam temperature T 0 When the current temperature T obtained by monitoring is less than the saturated steam temperature T 0When the gaseous refrigerant is in an unsaturated state, according to the current temperature T and the saturated steam temperature T 0 The heating power and other parameters of the gas supply tank 110 can be determined by the difference.

[0051] Alternatively, if Figure 1 As shown, the fluid monitoring device includes a second pressure monitoring device 141, a second temperature monitoring device 142 and a second flow monitoring device 143, which are arranged on the gas supply tank 110 to monitor various parameters such as pressure, temperature and flow in the gas supply tank 110.

[0052] Alternatively, if Figure 2 As shown, the fluid monitoring device also includes a third pressure monitoring device 144, a third temperature monitoring device 145 and a third flow monitoring device 146, which are arranged on the pipeline at the gas supply port of the gas bearing of the compressor 310. Various parameters of the gas refrigerant entering the gas bearing of the compressor 310 are monitored. Through the monitoring data of the fluid monitoring device there, the processing parameters of the aforementioned gas supply tank 110 and other equipment can be adjusted.

[0053] Optionally, the fluid monitoring device further includes a fourth pressure monitoring device (not shown), a third temperature monitoring device (not shown) and a third flow monitoring device (not shown), which are arranged on the pipeline at the refrigerant inlet of the gas supply tank 110. Monitor various parameters of the refrigerant entering the gas supply tank 110. Wherein, when the refrigerant inlet of the gas supply tank 110 includes a liquid refrigerant inlet 113 and a gaseous refrigerant inlet 114, a fourth pressure monitoring device (not shown), a third temperature monitoring device (not shown) and a third flow monitoring device are respectively arranged on the pipelines at the liquid refrigerant inlet and the gaseous refrigerant inlet 114.

[0054] Optionally, the fluid monitoring device further includes a fifth pressure monitoring device (not shown), a fifth temperature monitoring device (not shown) and a fifth flow monitoring device (not shown), which are arranged on the pipeline at the gas outlet 111 of the gas supply tank 110. Various parameters of the gas refrigerant discharged after heating and pressurizing treatment by the gas supply tank 110 are monitored.

[0055] Combination Figures 1 to 3 As shown, an embodiment of the present disclosure provides a refrigeration system 20, including the aforementioned motor cooling system of the air suspension compressor.

[0056] The refrigeration system of the embodiment of the present disclosure includes a compressor 310, a condenser 320, a throttling device 330 and an evaporator 340 connected in sequence, which are connected through pipelines to form a refrigeration cycle. The pipeline of the refrigeration cycle is also provided with a one-way valve, a flow control device (electric ball valve), a filter, a fluid monitoring device and other structural parts. The installation position can be referred to Figure 3 As shown, no further description is given here.

[0057] In the refrigeration system of the disclosed embodiment, the refrigerant in the gas supply tank 110 in the gas bearing gas supply unit is used as the cooling liquid source, which increases the demand for liquid refrigerant in the gas supply tank 110, thereby increasing the flow rate (i.e., supply load) of the pumping device 121, reducing the start-stop frequency, and increasing the life span, thereby improving the stability of the gas bearing gas supply unit and the stability of the refrigeration system. At the same time, the cooling liquid supply pipeline is simplified, the refrigerant loss is reduced, and the cost is reduced.

[0058] In the embodiments of the present disclosure, the refrigeration system may be a chiller system using an air-suspended compressor, or other air-conditioning systems using an air-suspended compressor.

[0059] In the present disclosure, Figures 1 to 3 In the refrigeration system shown, for the sake of convenience and visualization, the air supply and enthalpy increase pipelines of the compressor are omitted.

[0060] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A motor cooling system for an air suspension compressor, characterized in that: include: A gas bearing gas supply unit, comprising a gas supply tank, the gas supply tank comprising a refrigerant inlet, a gas outlet and a liquid refrigerant outlet; the refrigerant inlet is connected to the refrigerant in the refrigeration system where the compressor is located; the gas outlet is communicated with the gas supply port of the gas bearing of the compressor; wherein the liquid refrigerant outlet is arranged at the bottom of the gas supply tank; The first pipeline has two ports that are respectively connected to the liquid refrigerant outlet of the gas supply tank and the motor coolant supply port of the compressor; the liquid refrigerant in the gas supply tank is supplied to the motor of the gas suspension compressor as the motor coolant through the first pipeline; The refrigerant inlet includes a liquid refrigerant inlet, and the liquid refrigerant inlet is connected to the liquid refrigerant in the refrigeration system where the compressor is located.

2. The motor cooling system according to claim 1, characterized in that: Also includes: A first flow control device, disposed on the first pipeline; and / or, The liquid supply pump is connected to the first pipeline to provide power for the first pipeline.

3. The motor cooling system according to claim 2, characterized in that: The first flow control device is an electronic expansion valve.

4. The motor cooling system according to claim 1, characterized in that: Also includes, The first fluid monitoring device is arranged on the pipeline at the motor coolant supply port of the compressor.

5. The motor cooling system according to any one of claims 1 to 4, characterized in that: The gas bearing gas supply unit further comprises: The second pipeline has two ports which are respectively connected to the liquid refrigerant inlet of the gas supply tank and the condenser in the refrigeration system where the compressor is located.

6. The motor cooling system according to claim 5, characterized in that: The gas bearing gas supply unit further comprises: The pumping device is connected to the second pipeline to provide power for the second pipeline.

7. The motor cooling system according to claim 6, characterized in that: The pumping device comprises a compressor.

8. The motor cooling system according to claim 6 or 7, characterized in that: The gas bearing gas supply unit further comprises: The first filtering device is arranged on the second pipeline between the condenser and the pumping device, and filters the refrigerant in the second pipeline.

9. The motor cooling system according to claim 5, characterized in that: The gas bearing gas supply unit further comprises: A first one-way valve is disposed on the second pipeline to prevent reverse flow.

10. The motor cooling system according to claim 5, characterized in that: The refrigerant inlet further comprises a gaseous refrigerant inlet; the gas bearing gas supply unit further comprises: A third pipeline, two ports of which are respectively connected to the gas refrigerant inlet of the gas supply tank and the pipeline at the exhaust port of the compressor; The second flow control device is arranged on the third pipeline.

11. The motor cooling system according to claim 10, characterized in that: The gas bearing gas supply unit further comprises: The second filter device is arranged on the third pipeline and filters the refrigerant in the third pipeline.

12. The motor cooling system according to claim 10, characterized in that: The gas bearing gas supply unit further comprises: The second one-way valve is arranged on the third pipeline to prevent the gaseous refrigerant in the third pipeline from flowing back.

13. The motor cooling system according to any one of claims 1 to 4, characterized in that: The gas bearing gas supply unit further comprises: The fluid monitoring device is respectively arranged on the gas supply tank and on the pipeline at the gas supply port of the gas bearing of the compressor.

14. The motor cooling system according to claim 13, characterized in that: The fluid monitoring device is respectively arranged on the pipeline at the refrigerant inlet of the gas supply tank and the pipeline at the gas outlet of the gas supply tank.

15. A refrigeration system, characterized in that: A motor cooling system comprising an air suspension compressor according to any one of claims 1 to 14.

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