Machine room refrigeration air conditioner and data center

Abstract

The utility model relates to a machine room refrigeration air conditioner and a data center. The machine room refrigeration air conditioner comprises a refrigerant main flow path; the evaporator, the compressor, the condenser, the fluorine pump and the expansion valve are sequentially arranged in the flowing direction of the refrigerant main flow path, and at least one of the compressor and the fluorine pump is started and communicated with the refrigerant main flow path; the frequency converter cooling flow path is connected with the part, between the fluorine pump and the expansion valve, of the refrigerant main flow path in parallel, a frequency converter liquid cooling plate is arranged on the frequency converter cooling flow path, and the frequency converter cooling flow path can be selectively conducted; when the compressor is started, the frequency converter cooling flow path is conducted, and a refrigerant in the refrigerant main flow path can flow through the frequency converter cooling flow path and then enter the expansion valve; when the compressor is closed and the fluorine pump is started, the frequency converter cooling flow path is disconnected, and the refrigerant flowing through the fluorine pump directly enters the expansion valve. According to the machine room refrigeration air conditioner, condensation water is not prone to being generated on the surface of the frequency converter due to too low temperature, so that the problems of short circuit, corrosion and the like caused by the condensation water are not prone to occurring, and the frequency converter is not prone to damage and longer in service life.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation in computer rooms, and in particular to refrigeration and air conditioning in computer rooms and data centers. Background Art

[0002] As data center energy consumption gradually increases, the need for heat dissipation is also increasing. In related technologies, air conditioners are typically installed in data center computer rooms to cool down various equipment and prevent them from malfunctioning due to overheating. These air conditioners typically feature a compressor and a fluorine pump. In summer, only the compressor operates; in winter, only the fluorine pump operates; and in spring and autumn, both the compressor and the fluorine pump operate simultaneously. When the compressor is operating, its inverter generates heat, necessitating a dedicated liquid cooling plate for cooling. However, in winter, when the compressor is not operating, the inverter temperature is not high, but the liquid cooling plate continues to cool the inverter, causing condensation to form on the inverter surface. This condensation can cause problems such as short circuits and corrosion, damaging the inverter or shortening its lifespan. Utility Model Content

[0003] Based on this, it is necessary to provide a computer room refrigeration air conditioner and data center, in which the inverter is not prone to condensation on the surface due to low temperature, and is not prone to short circuit, corrosion and other problems caused by condensation, thereby making the inverter less prone to damage and having a longer life.

[0004] A computer room refrigeration and air conditioning system, comprising:

[0005] A main refrigerant path for circulating the refrigerant;

[0006] an evaporator, a compressor, a condenser, a fluorine pump, and an expansion valve arranged in sequence along the flow direction of the refrigerant main flow path, at least one of the compressor and the fluorine pump being turned on and in communication with the refrigerant main flow path; and

[0007] A frequency converter cooling flow path is connected in parallel with a portion of the refrigerant main flow path between the fluorine pump and the expansion valve, a frequency converter liquid cooling plate is provided on the frequency converter cooling flow path, and the frequency converter cooling flow path is selectively conductive;

[0008] When the compressor is turned on, the inverter cooling flow path is connected, and the refrigerant in the refrigerant main flow path can flow through the inverter cooling flow path and then enter the expansion valve;

[0009] When the compressor is turned off and the fluorine pump is turned on, the inverter cooling flow path is disconnected, and the refrigerant flowing through the fluorine pump directly enters the expansion valve.

[0010] In some embodiments, the computer room cooling air conditioner includes a first branch flow path group and a second branch flow path group;

[0011] The first branch flow path group is connected between the evaporator and the condenser, and includes a first branch and a second branch connected in parallel. The compressor is arranged in the first branch. The first branch and the second branch are selectively conductive.

[0012] The second branch flow path group is connected between the condenser and the expansion valve, and includes a third branch and a fourth branch connected in parallel. The fluorine pump is arranged in the third branch, and the third branch and the fourth branch can be selectively connected.

[0013] In some embodiments, in summer mode, the first branch is turned on, the second branch is turned off, the third branch is turned off, and the fourth branch is turned on;

[0014] In the spring and autumn mode, the first branch is turned on, the second branch is turned off, the third branch is turned on, and the fourth branch is turned off;

[0015] In winter mode, the first branch is disconnected, the second branch is connected, the third branch is connected, and the fourth branch is disconnected.

[0016] In some embodiments, the third branch is provided with a liquid storage tank located upstream of the fluorine pump.

[0017] In some embodiments, one-way valves are provided on the second branch, the third branch, and the fourth branch.

[0018] In some embodiments, a bypass electromagnetic two-way valve and a one-way valve are provided on the inverter cooling flow path, and the one-way valve is located downstream of the inverter liquid cooling plate.

[0019] In some embodiments, the machine room refrigeration air conditioner includes a controller, and the compressor, the fluorine pump and the bypass electromagnetic two-way valve are all communicatively connected to the controller.

[0020] In some embodiments, the refrigerant main flow path includes a first flow section connected between the fluorine pump and the expansion valve, the inverter cooling flow path is connected in parallel to the first flow section, and a drying filter is provided on the first flow section.

[0021] In some embodiments, a sight glass is provided on the first flow path section.

[0022] In some embodiments, the computer room refrigeration air conditioner includes a temperature sensor, and the temperature sensor is arranged on the inverter of the compressor.

[0023] A data center comprises the above-mentioned computer room refrigeration air conditioner.

[0024] In the above-mentioned computer room refrigeration and air conditioning and data center, at least one of the compressor and the fluorine pump is turned on and connected to the main refrigerant path; when it is summer or spring and autumn, when the compressor is turned on, the inverter cooling path is connected, and the refrigerant in the main refrigerant path can flow through the inverter cooling path and then enter the expansion valve. Therefore, the high-pressure liquid refrigerant after condensation and heat release in the condenser can flow through the inverter liquid cooling plate, so that the inverter liquid cooling plate can cool the inverter. Since the compressor is working at this time, the temperature of the inverter itself is relatively high. At this time, the refrigerant cooling it will not cause its temperature to be too low to produce condensation water, but instead, The temperature can be kept in a more appropriate range, and the inverter's working performance will be better; when it is winter, the compressor is turned off and the fluorine pump is turned on, the inverter cooling flow path is disconnected, and the refrigerant flowing through the fluorine pump directly enters the expansion valve, and does not flow through the inverter cooling flow path, that is, it does not flow through the inverter liquid cooling plate, so the inverter will not be cooled. Since the compressor itself is not working at this time, the inverter temperature is not high, and not cooling it can ensure that its temperature will not be too low, and it is not easy to produce condensation water, so it is not easy to cause short circuit, corrosion and other problems due to condensation water, thereby making the inverter less prone to damage and having a longer life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a working principle diagram of the computer room refrigeration and air conditioning in one embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of a computer room refrigeration air conditioner in one embodiment of the present application when only the compressor is working.

[0027] Figure 3 This is a schematic diagram of the compressor and fluorine pump of the computer room refrigeration air conditioner in one embodiment of the present application when both are working.

[0028] Figure 4 This is a schematic diagram of an embodiment of the present application in which only the fluorine pump of the computer room refrigeration air conditioner is working.

[0029] Reference numerals:

[0030] 100, refrigerant main flow path; 110, first flow path section; 111, filter drier; 112, sight glass;

[0031] 210, evaporator; 220, compressor; 230, condenser; 240, fluorine pump; 250, expansion valve;

[0032] 300, inverter cooling flow path; 310, inverter liquid cooling plate; 311, bypass electromagnetic two-way valve; 312, first one-way valve;

[0033] 400, first branch flow path group; 410, first branch; 420, second branch; 421, second one-way valve;

[0034] 500, second branch flow path group; 510, third branch; 511, liquid storage tank; 512, third one-way valve; 520, fourth branch; 521, fourth one-way valve. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0041] See Figures 1 to 4 The computer room refrigeration and air conditioning system provided in one embodiment of the present application includes a refrigerant main flow path 100, an inverter cooling flow path 300, an evaporator 210, a compressor 220, a condenser 230, a fluorine pump 240, and an expansion valve 250. The refrigerant main flow path 100 is used to allow the refrigerant to circulate along it. The evaporator 210, the compressor 220, the condenser 230, the fluorine pump 240, and the expansion valve 250 are arranged in sequence along the flow direction of the refrigerant main flow path 100, and at least one of the compressor 220 and the fluorine pump 240 is turned on and connected to the refrigerant main flow path 100. The inverter cooling flow path 300 is connected in parallel with the portion of the refrigerant main flow path 100 located between the fluorine pump 240 and the expansion valve 250. The inverter cooling flow path 300 is provided with an inverter liquid cooling plate 310, and the inverter cooling flow path 300 can be selectively connected. When compressor 220 is on, inverter cooling flow path 300 is open, allowing refrigerant in main refrigerant path 100 to flow through inverter cooling flow path 300 and into expansion valve 250. When compressor 220 is off and fluorine pump 240 is on, inverter cooling flow path 300 is disconnected, allowing refrigerant flowing through fluorine pump 240 to directly enter expansion valve 250.

[0042] In the above-mentioned machine room refrigeration and air conditioning, at least one of the compressor 220 and the fluorine pump 240 is turned on and connected to the refrigerant main flow path 100; when it is summer or spring and autumn, when the compressor 220 is turned on, the inverter cooling flow path 300 is connected, and the refrigerant in the refrigerant main flow path 100 can flow through the inverter cooling flow path 300 and enter the expansion valve 250. Therefore, the high-pressure liquid refrigerant after condensation and heat release by the condenser 230 can flow through the inverter liquid cooling plate 310, so that the inverter liquid cooling plate 310 can cool the inverter. Since the compressor 220 is working at this time, the temperature of the inverter itself is relatively high, and the refrigerant cooling it will not cause its temperature to be too low to produce condensation water. , but can keep its temperature in a more appropriate range, and the inverter working performance will be better; when it is winter, the compressor 220 is turned off and the fluorine pump 240 is turned on, the inverter cooling flow path 300 is disconnected, and the refrigerant flowing through the fluorine pump 240 directly enters the expansion valve 250, and does not flow through the inverter cooling flow path 300, that is, it does not flow through the inverter liquid cooling plate 310, so the inverter will not be cooled. Since the compressor 220 itself is not working at this time, the inverter temperature is not high, and not cooling it can ensure that its temperature will not be too low, and it is not easy to generate condensation water, so it is not easy to cause short circuit, corrosion and other problems due to condensation water, thereby making the inverter less likely to be damaged and having a longer service life.

[0043] Specifically, the portion of the refrigerant main flow path 100 connected between the fluorine pump 240 and the expansion valve 250 is the first flow path section 110 , and the inverter cooling flow path 300 is connected in parallel to the first flow path section 110 .

[0044] See Figures 1 to 4 In some embodiments, the computer room refrigeration and air conditioning system includes a first branch flow path group 400 and a second branch flow path group 500; the first branch flow path group 400 is connected between the evaporator 210 and the condenser 230, and includes a first branch 410 and a second branch 420 in parallel, and the compressor 220 is arranged in the first branch 410, and the first branch 410 and the second branch 420 can be selectively connected; the second branch flow path group 500 is connected between the condenser 230 and the expansion valve 250, and includes a third branch 510 and a fourth branch 520 in parallel, and the fluorine pump 240 is arranged in the third branch 510, and the third branch 510 and the fourth branch 520 can be selectively connected.

[0045] Specifically, when the first branch 410 is connected and the second branch 420 is disconnected, the first branch 410 is connected to the main refrigerant path 100, at which point the compressor 220 is turned on, and the inverter of the compressor 220 also starts to operate. Correspondingly, the inverter cooling flow path 300 is connected, and the refrigerant flows through the inverter liquid cooling plate 310 to cool the inverter. When the second branch 420 is connected and the first branch 410 is disconnected, and the third branch 510 is connected and the fourth branch 520 is disconnected, the second branch 420 and the third branch 510 are both connected to the main refrigerant path 100. At this time, the compressor 220 is turned off, the fluorine pump 240 is turned on, and the inverter of the compressor 220 also stops working. Correspondingly, the inverter cooling flow path 300 is disconnected, and the refrigerant flowing through the fluorine pump 240 directly enters the expansion valve 250 without passing through the inverter cooling flow path 300. The inverter liquid cooling plate 310 does not cool the inverter.

[0046] See Figures 1 to 4 In some embodiments, in the summer mode, the first branch 410 is turned on, the second branch 420 is turned off, the third branch 510 is turned off, and the fourth branch 520 is turned on; in the spring and autumn mode, the first branch 410 is turned on, the second branch 420 is turned off, the third branch 510 is turned on, and the fourth branch 520 is turned off; in the winter mode, the first branch 410 is turned off, the second branch 420 is turned on, the third branch 510 is turned on, and the fourth branch 520 is turned off.

[0047] Usually, when the external ambient temperature is high in summer, the cooling capacity of the fluorine pump 240 is small and cannot meet the requirements. Therefore, the first branch 410 is turned on and the third branch 510 is disconnected, allowing only the compressor 220 to work; when the external ambient temperature is low in winter, the compressor 220 can still output a large cooling capacity, but the energy consumption is high. At this time, the fluorine pump 240 can output a large cooling capacity and has low energy consumption. Therefore, the first branch 410 is disconnected and the third branch 510 is turned on, allowing only the fluorine pump 240 to work; when the external ambient temperature is moderate in spring and autumn, it is between the above two situations. The first branch 410 is turned on, the third branch 510 is turned on, and the compressor 220 and the fluorine pump 240 work at the same time.

[0048] In the spring and autumn mode, the low-temperature, low-pressure gaseous refrigerant flowing out of the evaporator 210 is compressed by the compressor 220 to become a high-temperature, high-pressure gaseous refrigerant, and then condensed by the condenser 230 to become a medium-high-temperature, high-pressure liquid refrigerant. It is further compressed by the fluorine pump 240, and the pressure is further increased. It then passes through the expansion valve 250 to become a low-temperature, low-pressure gas-liquid two-phase refrigerant, and then evaporates through the evaporator 210 to become a low-temperature, low-pressure gaseous refrigerant, thus completing a cycle.

[0049] In the summer mode, the difference from the spring and autumn modes is that the medium-high temperature and high pressure liquid refrigerant flowing out of the condenser 230 flows directly into the expansion valve 250 and becomes a low temperature and low pressure gas-liquid two-phase refrigerant.

[0050] In winter mode, the low-temperature, low-pressure gaseous refrigerant flowing out of the evaporator 210 is condensed by the condenser 230 to become a low-temperature, low-pressure liquid refrigerant, and then compressed by the fluorine pump 240 to become a low-temperature, medium- and high-pressure liquid refrigerant, and then passes through the expansion valve 250 to become a low-temperature, low-pressure gas-liquid two-phase refrigerant, and then evaporates through the evaporator 210 to become a low-temperature, low-pressure gaseous refrigerant, thus completing a cycle.

[0051] See Figures 1 to 4 In some embodiments, a liquid storage tank 511 is provided on the third branch 510 and is located upstream of the fluorine pump 240. The liquid storage tank 511 is used to store liquid refrigerant. When the refrigerant is insufficient during the entire cycle, it can be replenished through the liquid storage tank 511. If the refrigerant is sufficient, the valve of the liquid storage tank 511 is closed and no refilling is performed. In this way, the refrigerant supply during the entire cycle can be dynamically met.

[0052] See Figures 1 to 4 In some embodiments, one-way valves are provided on the second branch 420 , the third branch 510 , and the fourth branch 520 .

[0053] Specifically, a second one-way valve 421 is provided on the second branch 420, a third one-way valve 512 is provided on the third branch 510, and a fourth one-way valve 521 is provided on the fourth branch 520 to ensure one-way flow of the refrigerant and prevent reverse backflow, thereby ensuring the normal operation of the entire circulation process. Similarly, a one-way valve can also be provided on the first branch 410.

[0054] See Figures 1 to 4 In some embodiments, a bypass electromagnetic two-way valve 311 and a one-way valve are provided on the inverter cooling flow path 300 , and the one-way valve is located downstream of the inverter liquid cooling plate 310 .

[0055] Specifically, a first one-way valve 312 is provided on the inverter cooling flow path 300. The first one-way valve 312 is located downstream of the inverter liquid cooling plate 310, and a bypass electromagnetic two-way valve 311 is located upstream of the inverter liquid cooling plate 310. The bypass electromagnetic two-way valve 311 is used to control the conduction and disconnection of the inverter cooling flow path 300, while the first one-way valve 312 is used to prevent the refrigerant at the end of the first flow path section 110 from flowing back into the inverter cooling flow path 300.

[0056] See Figures 1 to 4 In some embodiments, the computer room refrigeration and air conditioning system includes a controller, and the compressor 220, the fluorine pump 240 and the bypass electromagnetic two-way valve 311 are all communicatively connected to the controller.

[0057] Specifically, the controller controls the opening and closing of the bypass electromagnetic two-way valve 311 based on the current on / off status of the compressor 220 and the fluorine pump 240, thereby opening and closing the inverter cooling flow path 300. When the compressor 220 is on, the inverter cooling flow path 300 is open; when the compressor 220 is off and the fluorine pump 240 is on, the inverter cooling flow path 300 is open.

[0058] See Figures 1 to 4 In some embodiments, a drying filter 111 is provided on the first flow path section 110 .

[0059] Regardless of whether the inverter cooling flow path 300 is conductive, at least a portion of the refrigerant in the refrigerant main flow path 100 will flow through the first flow path section 110. A drying filter 111 is provided on the first flow path section 110 to remove moisture and impurities in the entire flow path and ensure the cooling effect. The refrigerant continuously circulates through the drying filter 111 multiple times, thereby completely adsorbing and removing the moisture and impurities therein.

[0060] See Figures 1 to 4 In some embodiments, a sight glass 112 is provided on the first flow path section 110 .

[0061] By providing the sight glass 112, the operator can conveniently observe the flow state of the refrigerant in the current flow path, so as to timely discover and perform maintenance when an unexpected situation occurs.

[0062] See Figures 1 to 4 In some embodiments, the computer room cooling air conditioner includes a temperature sensor, which is disposed on the inverter of the compressor 220 .

[0063] The temperature sensor can detect the temperature of the inverter, so as to timely feedback the liquid cooling effect of the inverter liquid cooling plate 310 on the inverter when the compressor 220 is working, so as to avoid inverter failure due to poor cooling effect and failure to timely detect it.

[0064] A data center provided in one embodiment of the present application includes the computer room refrigeration and air conditioning in any one of the above embodiments.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A machine room refrigeration air conditioner, characterized in that: The computer room refrigeration and air conditioning comprises: A main refrigerant path for circulating the refrigerant; an evaporator, a compressor, a condenser, a fluorine pump, and an expansion valve arranged in sequence along the flow direction of the refrigerant main flow path, at least one of the compressor and the fluorine pump being turned on and in communication with the refrigerant main flow path; and A frequency converter cooling flow path is connected in parallel with a portion of the refrigerant main flow path between the fluorine pump and the expansion valve, a frequency converter liquid cooling plate is provided on the frequency converter cooling flow path, and the frequency converter cooling flow path is selectively conductive; When the compressor is turned on, the inverter cooling flow path is connected, and the refrigerant in the refrigerant main flow path can flow through the inverter cooling flow path and then enter the expansion valve; When the compressor is turned off and the fluorine pump is turned on, the inverter cooling flow path is disconnected, and the refrigerant flowing through the fluorine pump directly enters the expansion valve.

2. The computer room refrigeration air conditioner according to claim 1, characterized in that: The computer room refrigeration air conditioner includes a first branch flow path group and a second branch flow path group; The first branch flow path group is connected between the evaporator and the condenser, and includes a first branch and a second branch connected in parallel. The compressor is arranged in the first branch. The first branch and the second branch are selectively conductive. The second branch flow path group is connected between the condenser and the expansion valve, and includes a third branch and a fourth branch connected in parallel. The fluorine pump is arranged in the third branch, and the third branch and the fourth branch can be selectively connected.

3. The computer room refrigeration and air conditioning system according to claim 2, characterized in that: In the summer mode, the first branch is turned on, the second branch is turned off, the third branch is turned off, and the fourth branch is turned on; In the spring and autumn mode, the first branch is turned on, the second branch is turned off, the third branch is turned on, and the fourth branch is turned off; In winter mode, the first branch is disconnected, the second branch is connected, the third branch is connected, and the fourth branch is disconnected.

4. The computer room refrigeration air conditioner according to claim 2, characterized in that: The third branch is provided with a liquid storage tank located upstream of the fluorine pump.

5. The computer room refrigeration and air conditioning system according to claim 2, characterized in that: One-way valves are provided on the second branch, the third branch and the fourth branch.

6. The computer room refrigeration and air conditioning according to any one of claims 1 to 5, characterized in that: A bypass electromagnetic two-way valve and a one-way valve are provided on the inverter cooling flow path, and the one-way valve is located downstream of the inverter liquid cooling plate.

7. The computer room refrigeration and air conditioning system according to claim 6, characterized in that: The machine room refrigeration air conditioner includes a controller, and the compressor, the fluorine pump and the bypass electromagnetic two-way valve are all communicatively connected to the controller.

8. The computer room refrigeration air conditioner according to any one of claims 1 to 5, characterized in that: The refrigerant main flow path includes a first flow path section connected between the fluorine pump and the expansion valve. The inverter cooling flow path is connected in parallel to the first flow path section. A drying filter is provided on the first flow path section.

9. The computer room refrigeration and air conditioning system according to claim 8, characterized in that: A sight glass is provided on the first flow path section.

10. The computer room refrigeration and air conditioning according to any one of claims 1 to 5, characterized in that: The machine room refrigeration air conditioner includes a temperature sensor, and the temperature sensor is arranged on the frequency converter of the compressor.

11. A data center, characterized in that: The data center comprises: the computer room refrigeration air conditioner according to any one of claims 1 to 10.

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