A machine room refrigeration system and a control method and device thereof

Abstract

The application discloses a machine room refrigeration system and a control method and device thereof, which are used for reducing energy consumption of the refrigeration system and avoiding rapid temperature rise of a data center machine room caused by failure of a water supply system. The system comprises an indoor unit, a shell-tube condenser, an air-cooled condenser, a shell-tube condenser electromagnetic valve, an air-cooled condenser electromagnetic valve, a shell-tube condenser one-way valve, an air-cooled condenser one-way valve and a pump. A three-way joint is arranged on a refrigerant outflow pipeline of the indoor unit and is connected with the shell-tube condenser electromagnetic valve and the air-cooled condenser electromagnetic valve respectively. The shell-tube condenser electromagnetic valve is connected with the shell-tube condenser one-way valve through the shell-tube condenser. The air-cooled condenser electromagnetic valve is connected with the air-cooled condenser one-way valve through the air-cooled condenser. The shell-tube condenser one-way valve and the air-cooled condenser one-way valve are connected with one end of the pump through a three-way joint. The other end of the pump is connected with a refrigerant inflow pipeline of the indoor unit.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to a computer room refrigeration system and its control method and device. Background Technology

[0002] In recent years, with the development of technology, data has become an increasingly important means of production, and data centers, as the base for storing data, have high cooling requirements. Currently, there are two main cooling methods for data centers: air cooling and water cooling.

[0003] Currently, data center computer rooms typically use either air cooling or water cooling for cooling. The cooling methods are relatively simple. If only air cooling is used, the energy consumption of the cooling system is high. If only water cooling is used, a failure in the cooling water supply system will cause all units in the same pipeline system to fail and shut down simultaneously, leading to a rapid increase in the temperature of the data center computer room. Summary of the Invention

[0004] This application provides a data center cooling system and its control method and apparatus, which can reduce the energy consumption of the cooling system while avoiding a rapid increase in the temperature of the data center due to a failure of the water supply system.

[0005] In a first aspect, embodiments of this application provide a computer room cooling system, the system comprising: an indoor unit, a shell-and-tube condenser, an air-cooled condenser, a shell-and-tube condenser solenoid valve, an air-cooled condenser solenoid valve, a shell-and-tube condenser check valve, an air-cooled condenser check valve, and a pump cabinet, wherein...

[0006] The refrigerant outlet pipe of the indoor unit is connected to the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve respectively via a tee connector. The shell-and-tube condenser solenoid valve is connected to the shell-and-tube condenser check valve through the shell-and-tube condenser. The air-cooled condenser solenoid valve is connected to the air-cooled condenser check valve through the air-cooled condenser. The shell-and-tube condenser check valve and the air-cooled condenser check valve are connected to one end of the pump cabinet via a tee connector. The other end of the pump cabinet is connected to the refrigerant inlet pipe of the indoor unit.

[0007] In the above system, the parallel design of air-cooled condensers and shell-and-tube condensers allows the computer room cooling system to combine the advantages of air-cooled and water-cooled cooling. The computer room cooling system can operate in water-cooled mode to improve energy efficiency, and at the same time, it can operate in air-cooled mode to provide emergency cooling and maintain normal system operation.

[0008] Meanwhile, in this embodiment, a shell-and-tube condenser solenoid valve is installed at the inlet of the shell-and-tube condenser, and a shell-and-tube condenser check valve is installed at the outlet of the shell-and-tube condenser. An air-cooled condenser solenoid valve is installed at the inlet of the air-cooled condenser, and an air-cooled condenser check valve is installed at the outlet of the air-cooled condenser. The air-cooled condenser and the shell-and-tube condenser are isolated by the solenoid valve at the condenser inlet and the check valve at the condenser outlet, preventing refrigerant from flowing into the shell-and-tube condenser during air-cooled cooling mode and refrigerant from flowing into the air-cooled condenser during water-cooled cooling mode. This improves the stability of the refrigeration system and ensures the cooling capacity of the computer room refrigeration system.

[0009] In one possible implementation, the system further includes a pressure relief device disposed at one or more of the following locations:

[0010] Both ends of the one-way valve of the shell-and-tube condenser;

[0011] Both ends of the one-way valve of the air-cooled condenser;

[0012] Between the refrigerant outflow pipe and the refrigerant inflow pipe of the indoor unit.

[0013] In the above system, by setting up a pressure relief device, the pressure in the refrigerant outflow pipe and / or refrigerant inflow pipe of the indoor unit can be released in time when the solenoid valve fails or the computer room cooling system stops, so as to avoid excessive pressure leading to computer room cooling system failure.

[0014] In one possible implementation, the pressure relief device includes a pressure relief solenoid valve or a pressure relief capillary tube.

[0015] In the above system, the pressure relief device can be either a pressure relief solenoid valve or a pressure relief capillary tube. When the pressure relief device is a pressure relief capillary tube, no additional control is required, and it can automatically balance the pressure in the pipeline. When the pressure relief device is a pressure relief solenoid valve, the pressure in the pipeline can be regulated by controlling the opening or closing of the pressure relief solenoid valve. Furthermore, when the pressure relief solenoid valve is closed, it can prevent refrigerant migration between the refrigerant outflow pipeline and the refrigerant inflow pipeline.

[0016] Secondly, embodiments of this application provide a control method for a data center cooling system, applied to the data center cooling system mentioned in the first aspect of embodiments of this application, the method comprising:

[0017] Determine the operating mode of the computer room cooling system;

[0018] According to the operating mode, the solenoid valves of the air-cooled condenser and the shell-and-tube condenser are controlled to adjust the operating mode of the computer room refrigeration system.

[0019] In the above method, after determining the operating mode of the computer room cooling system, the operating mode of the computer room cooling system is adjusted by controlling the solenoid valves of the air-cooled condenser and the shell and tube condenser, so that the computer room cooling system can flexibly switch between different operating modes to adapt to different needs.

[0020] In one possible implementation, the operating modes include air-cooled mode and water-cooled mode;

[0021] The step of controlling the solenoid valve of the air-cooled condenser and the solenoid valve of the shell-and-tube condenser according to the operating mode includes:

[0022] When the operating mode of the computer room cooling system is determined to be the air-cooled cooling mode, the solenoid valve of the air-cooled condenser is opened and the solenoid valve of the shell-and-tube condenser is closed; or

[0023] When the operating mode of the computer room cooling system is determined to be the water-cooled cooling mode, the solenoid valve of the air-cooled condenser is closed and the solenoid valve of the shell-and-tube condenser is opened.

[0024] In the above method, the operating modes of the computer room cooling system include air-cooled cooling mode and water-cooled cooling mode. The computer room cooling system can combine the advantages of air-cooled cooling and water-cooled cooling. The computer room cooling system can operate in water-cooled cooling mode to improve energy-saving effect, and at the same time, it can operate in air-cooled cooling mode to provide emergency cooling and maintain normal system operation.

[0025] In one possible implementation, the method further includes:

[0026] Obtain the pressure value of the refrigerant outlet pipe of the indoor unit;

[0027] When the pressure value of the refrigerant outlet pipe of the indoor unit is greater than the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are opened.

[0028] In the above method, by obtaining the pressure value of the refrigerant outflow pipe of the indoor unit, and controlling the opening of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve when the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold, the problem of the high pressure of the refrigerant outflow pipe of the indoor unit not being able to drop and recover quickly due to the failure of the shell-and-tube condenser solenoid valve or the air-cooled condenser solenoid valve can be avoided.

[0029] In one possible implementation, the method further includes:

[0030] When the pressure value of the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are closed.

[0031] In the above method, when the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve are closed to isolate the air-cooled condenser and the shell-and-tube condenser.

[0032] In one possible implementation, the method further includes:

[0033] When a pressure relief solenoid valve is provided at both ends of the shell-and-tube condenser check valve and / or at both ends of the air-cooled condenser check valve, the pressure value of the refrigerant inflow pipe of the indoor unit is obtained.

[0034] When the pressure in the refrigerant inlet pipe of the indoor unit exceeds a second preset pressure threshold, the pressure relief solenoid valve is opened; or

[0035] When the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

[0036] In the above method, when pressure relief solenoid valves are installed at both ends of the one-way valve of the shell-and-tube condenser and / or at both ends of the one-way valve of the air-cooled condenser, the pressure value of the refrigerant inflow pipe of the indoor unit is obtained. When the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold, the pressure relief solenoid valve is opened to release the pressure of the refrigerant inflow pipe and avoid excessive pressure in the refrigerant inflow pipe. When the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed to prevent the refrigerant at the outlet of the one-way valve from migrating to the condenser.

[0037] In one possible implementation, the method further includes:

[0038] When a pressure relief solenoid valve is installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit, the pressure values ​​of the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit are obtained respectively.

[0039] When the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold, and / or the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold, the pressure relief solenoid valve is opened.

[0040] In the above method, when a pressure relief solenoid valve is installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit, the pressure values ​​of the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit are obtained respectively. When the pressure value of the refrigerant outlet pipe of the indoor unit exceeds a first preset pressure threshold, and / or the pressure value of the refrigerant inlet pipe of the indoor unit exceeds a second preset pressure threshold, the pressure relief solenoid valve is opened to release the pipe pressure and prevent the pipe pressure from becoming too high.

[0041] In one possible implementation, the method further includes:

[0042] When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is controlled to close.

[0043] In the above method, when the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed to avoid refrigerant migration between the refrigerant outflow pipe and the refrigerant inflow pipe.

[0044] Thirdly, embodiments of this application provide a control device for a computer room cooling system, applied to the cooling system provided in the first aspect of embodiments of this application, the device comprising:

[0045] The first control module is used to determine the operating mode of the computer room cooling system, and according to the operating mode, control the solenoid valve of the air-cooled condenser and the solenoid valve of the shell and tube condenser to adjust the operating mode of the computer room cooling system.

[0046] The acquisition module is used to acquire the pressure value of the refrigerant outlet pipe of the indoor unit;

[0047] The second control module is used to control the opening of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve when the pressure value of the refrigerant outlet pipe of the indoor unit is greater than the first preset pressure threshold.

[0048] In one possible implementation, the second control module is further configured to:

[0049] When the pressure value of the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are closed.

[0050] In one possible implementation, pressure relief solenoid valves are provided at both ends of the shell-and-tube condenser check valve and / or at both ends of the air-cooled condenser check valve.

[0051] The acquisition module is further configured to: acquire the pressure value of the refrigerant inflow pipe of the indoor unit;

[0052] The second control module is further configured to: control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant inflow pipe of the indoor unit is greater than a second preset pressure threshold; or

[0053] When the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

[0054] In one possible implementation, a pressure relief solenoid valve is provided between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit.

[0055] The acquisition module is further configured to: acquire the pressure value of the refrigerant inflow pipe of the indoor unit;

[0056] The second control module is further configured to: control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant outlet pipe of the indoor unit is greater than a first preset pressure threshold, and / or the pressure value of the refrigerant inlet pipe of the indoor unit is greater than a second preset pressure threshold; or

[0057] When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is controlled to close.

[0058] Fourthly, embodiments of this application provide an electronic device, the device including a processor and a memory, the memory being used to store a program executable by the processor, and the processor being used to read the program in the memory and execute the method described in any one of the second aspects.

[0059] Fifthly, embodiments of this application also provide a computer storage medium having a computer program stored thereon, which, when executed by a processor, is used to implement the steps of the method described in the second aspect above.

[0060] In a sixth aspect, this application provides a computer program product comprising: computer program code, which, when run on a computer, causes the computer to perform the method described in any one of the second aspects.

[0061] For the technical effects that may be achieved in each of the third, fourth, fifth, and sixth aspects mentioned above, please refer to the description of the technical effects that may be achieved in the various possible solutions for the second aspect mentioned above, which will not be repeated here. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 A schematic diagram of a computer room cooling system provided in this application embodiment;

[0064] Figure 2 This is a schematic diagram of another computer room cooling system provided in an embodiment of this application;

[0065] Figure 3 This is a schematic diagram of another computer room cooling system provided in an embodiment of this application;

[0066] Figure 4 This is a schematic diagram of another computer room cooling system provided in an embodiment of this application;

[0067] Figure 5 This is a schematic diagram of the structure of another computer room cooling system provided in an embodiment of this application;

[0068] Figure 6 A schematic flowchart illustrating a control method for a computer room cooling system provided in an embodiment of this application;

[0069] Figure 7 A schematic flowchart illustrating the specific implementation process of a control method for a computer room cooling system provided in this application embodiment;

[0070] Figure 8 A schematic diagram of the structure of a control device for a computer room cooling system provided in this application embodiment;

[0071] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0072] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0073] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0074] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0075] Before introducing the data center cooling system and its control method provided in the embodiments of this application, the technical background of the embodiments of this application will be described in detail for ease of understanding.

[0076] In recent years, with the development of technology, data has become an increasingly important means of production, and data centers, as the base for storing data, have high cooling requirements. Currently, there are two main cooling methods for data centers: air cooling and water cooling.

[0077] Currently, data center computer rooms typically use either air cooling or water cooling for cooling. The cooling methods are relatively simple. If only air cooling is used, the energy consumption of the cooling system is high. If only water cooling is used, a failure in the cooling water supply system will cause all units in the same pipeline system to fail and shut down simultaneously, leading to a rapid increase in the temperature of the data center computer room.

[0078] In view of this, the present application provides a computer room cooling system and its control method and device. Through the parallel design of air-cooled condenser and shell and tube condenser, the computer room cooling system can combine the advantages of air-cooled cooling and water-cooled cooling. The computer room cooling system can operate in water-cooled mode to improve energy saving, and can also operate in air-cooled mode to provide emergency cooling and maintain normal system operation.

[0079] Meanwhile, in this embodiment, a shell-and-tube condenser solenoid valve is installed at the inlet of the shell-and-tube condenser, and a shell-and-tube condenser check valve is installed at the outlet of the shell-and-tube condenser. An air-cooled condenser solenoid valve is installed at the inlet of the air-cooled condenser, and an air-cooled condenser check valve is installed at the outlet of the air-cooled condenser. The air-cooled condenser and the shell-and-tube condenser are isolated by the solenoid valve at the condenser inlet and the check valve at the condenser outlet, preventing refrigerant from flowing into the shell-and-tube condenser during air-cooled cooling mode and refrigerant from flowing into the air-cooled condenser during water-cooled cooling mode. This improves the stability of the refrigeration system and ensures the cooling capacity of the computer room refrigeration system.

[0080] It should be noted that the shell-and-tube condenser used in the water-cooled condenser mentioned in the embodiments of this application may also be a liquid-cooled condenser in other embodiments of this application.

[0081] After introducing the background technology of the embodiments of this application, the data center cooling system and its control scheme provided in this application will be described in detail below with reference to specific embodiments.

[0082] See Figure 1 As shown, it is a structural schematic diagram of a computer room cooling system provided in an embodiment of this application, which includes: an indoor unit 10, a shell and tube condenser 11, an air-cooled condenser 12, a shell and tube condenser solenoid valve 13, an air-cooled condenser solenoid valve 14, a shell and tube condenser check valve 15, an air-cooled condenser check valve 16, and a pump 17.

[0083] The refrigerant outlet pipe of the indoor unit 10 is connected to the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14 via a tee connector. The shell-and-tube condenser solenoid valve 13 is connected to the shell-and-tube condenser check valve 15 via the shell-and-tube condenser 11. The air-cooled condenser solenoid valve 14 is connected to the air-cooled condenser check valve 16 via the air-cooled condenser 12. The shell-and-tube condenser check valve 15 and the air-cooled condenser check valve 16 are connected to one end of the pump 17 via a tee connector. The other end of the pump 17 is connected to the refrigerant inlet pipe of the indoor unit 10.

[0084] It should be noted that the refrigeration system may also include components such as a liquid storage tank connected to the pump 17. The indoor unit 10 may include, but is not limited to, components such as an evaporator 101, a compressor 102, an electronic expansion valve 103, and a compressor bypass check valve 104. The shell and tube condenser 11 may also include components such as an inlet pipe and an outlet pipe. This application embodiment does not limit these components.

[0085] In this embodiment, the parallel design of the air-cooled condenser and the shell-and-tube condenser enables the computer room cooling system to combine the advantages of air-cooled cooling and water-cooled cooling. The computer room cooling system can operate in water-cooled mode to improve energy efficiency, and at the same time, it can operate in air-cooled mode to provide emergency cooling and maintain normal system operation.

[0086] In specific implementation, under water-cooled cooling mode, the shell-and-tube condenser solenoid valve 13 is open, the air-cooled condenser solenoid valve 14 is closed, the shell-and-tube condenser 11 is running, and the refrigerant running path is indoor unit 10 - shell-and-tube condenser 11 - pump cabinet 17 - indoor unit 10; under air-cooled cooling mode, the air-cooled condenser solenoid valve 14 is open, the shell-and-tube condenser solenoid valve 13 is closed, the air-cooled condenser 12 is running, and the refrigerant running path is indoor unit 10 - air-cooled condenser 12 - pump cabinet 17 - indoor unit 10.

[0087] In this embodiment, a shell-and-tube condenser solenoid valve 13 is installed at the inlet of the shell-and-tube condenser 11, and a shell-and-tube condenser check valve 15 is installed at the outlet of the shell-and-tube condenser 11. An air-cooled condenser solenoid valve 14 is installed at the inlet of the air-cooled condenser 12, and an air-cooled condenser check valve 16 is installed at the outlet of the air-cooled condenser 12. The air-cooled condenser 11 and the shell-and-tube condenser 12 are isolated by the solenoid valve at the condenser inlet and the check valve at the condenser outlet, preventing refrigerant from flowing into the shell-and-tube condenser 11 during air-cooled cooling mode and from flowing into the air-cooled condenser 12 during water-cooled cooling mode, thereby improving the stability of the refrigeration system and ensuring the cooling capacity of the computer room refrigeration system.

[0088] In practical applications, according to the refrigeration principle, when the computer room refrigeration system is running normally and stably, the refrigerant flowing in the evaporator and condenser is a two-phase gas-liquid refrigerant. The refrigerant from the evaporator outlet to the condenser inlet is a gaseous refrigerant, and the refrigerant from the condenser outlet to the electronic expansion valve inlet is a liquid refrigerant.

[0089] Because of the addition of solenoid valves and check valves, the shell-and-tube condenser 11 and the air-cooled condenser 12 are isolated. When the solenoid valve fails to open due to malfunction or other reasons, or when the unit is shut down, the refrigerant outflow pipe of the indoor unit (the pipe between the evaporator and solenoid valve 13 or solenoid valve 14) becomes a closed pipe. Moreover, the pipe is usually wrapped with insulation cotton, so the temperature of the pipe drops very slowly, and the pressure of the pipe cannot drop in time, which can easily lead to excessive pressure.

[0090] As for the refrigerant inflow pipe of the indoor unit, that is, the pipe between the condenser outlet check valve and the evaporator, this section of the pipe is full of liquid during normal operation. When the unit is stopped or the solenoid valve is closed, it is also in a closed state. When the ambient temperature rises, the liquid density of the refrigerant decreases. Since the pipe is closed, the mass of the refrigerant remains unchanged. When the density decreases, the volume increases. However, since the volume of the pipe remains unchanged, and liquid cannot be compressed, there is a risk that the refrigerant will be sprayed out of the safety valve.

[0091] In some implementations, to prevent excessive pressure in the refrigerant outlet pipe of the indoor unit due to solenoid valve failure, the present application embodiments can solve the problem of excessive pressure in the refrigerant outlet pipe of the indoor unit by controlling the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14.

[0092] Specifically, when the refrigerant outflow pipe pressure of the indoor unit is too high, the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14 are opened simultaneously. Under this condition, the refrigerant in the refrigerant outflow pipe of the indoor unit will quickly migrate to the shell-and-tube condenser 11 and the air-cooled condenser 12, thereby achieving rapid pressure relief. After the refrigerant outflow pipe of the indoor unit drops, the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14 can be closed.

[0093] By simultaneously opening the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14, the problem of the pipeline high pressure not being able to drop and recover quickly due to the failure of one of the solenoid valves to open can be avoided to some extent.

[0094] In other embodiments, to prevent excessive pressure in the refrigerant outflow pipe and refrigerant inflow pipe of the indoor unit due to solenoid valve failure, the computer room refrigeration system provided in this application embodiment further includes: a pressure relief device, which is installed at one or more of the following locations: both ends of the shell-and-tube condenser check valve; both ends of the air-cooled condenser check valve; between the refrigerant outflow pipe and refrigerant inflow pipe of the indoor unit.

[0095] By installing a pressure relief device, the pressure in the refrigerant outflow pipe and / or refrigerant inflow pipe of the indoor unit can be released in time when the solenoid valve fails or the computer room cooling system stops, thus avoiding excessive pressure that could lead to computer room cooling system failure.

[0096] In specific implementation, the pressure relief device can be a pressure relief solenoid valve or a pressure relief capillary tube. Of course, in other embodiments of this application, other forms of pressure relief devices may also be used. The pressure relief capillary tube is a copper tube with a very small diameter, and it is itself a bidirectional copper tube.

[0097] When the pressure relief device is a pressure relief capillary tube, no additional control is required, and the pressure in the pipeline can be automatically balanced. When the pressure relief device is a pressure relief solenoid valve, the pressure in the pipeline can be adjusted by controlling the opening or closing of the pressure relief solenoid valve. When the pressure relief solenoid valve is closed, the refrigerant migration problem between the refrigerant outflow pipeline and the refrigerant inflow pipeline can be avoided.

[0098] In one example, such as Figure 2 As shown, pressure relief capillary tubes 20 are installed at both ends of the shell-and-tube condenser check valve 15. When the computer room refrigeration system is operating in air-cooled mode, the pressure at the outlet of the shell-and-tube condenser check valve 15 is higher than the pressure of the shell-and-tube condenser 11. Due to the communicating vessel principle, the refrigerant will continuously migrate to the shell-and-tube condenser 11 through the pressure relief capillary tubes 20. The pressure relief capillary tubes 20 can be connected to the needle valve via a nozzle for easy installation and disassembly.

[0099] Similarly, if pressure relief capillary tubes are installed at both ends of the one-way valve 16 of the air-cooled condenser, the refrigerant will migrate to the air-cooled condenser 12. Of course, in practical applications, pressure relief capillary tubes can be installed at both ends of the one-way valve 15 of the shell-and-tube condenser, or at both ends of the one-way valve 16 of the air-cooled condenser, or at both ends of the one-way valve 15 of the shell-and-tube condenser and the one-way valve 16 of the air-cooled condenser respectively.

[0100] In one example, such as Figure 3As shown, pressure relief solenoid valves 30 are installed at both ends of the one-way valve 15 of the shell and tube condenser. By obtaining the pressure of the refrigerant inflow pipe of the indoor unit, when the pressure of the refrigerant inflow pipe of the indoor unit is too high, the pressure relief solenoid valve 30 is opened, and the refrigerant will migrate to the shell and tube condenser 11 through the pressure relief solenoid valve 30 to relieve pressure.

[0101] Similarly, if a pressure relief solenoid valve is installed at both ends of the air-cooled condenser check valve 16, opening the pressure relief solenoid valve will cause the refrigerant to migrate and release pressure towards the air-cooled condenser 12. Of course, in practical applications, a pressure relief solenoid valve can be installed at both ends of the shell-and-tube condenser check valve 15, or at both ends of the air-cooled condenser check valve 16, or both ends of the shell-and-tube condenser check valve 15 and the air-cooled condenser check valve 16 respectively.

[0102] In one example, such as Figure 4 As shown, a pressure relief capillary tube 40 is installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit. In this case, when the pressure in the refrigerant outlet pipe of the indoor unit is too high, the refrigerant can migrate through the pressure relief capillary tube 40 to the refrigerant inlet pipe of the indoor unit to release the pipe pressure; when the pressure in the refrigerant inlet pipe of the indoor unit is too high, the refrigerant can migrate through the pressure relief capillary tube 40 to the refrigerant outlet pipe of the indoor unit to release the pipe pressure.

[0103] Of course, it should be noted that when the refrigerant outlet pipe pressure of the indoor unit is too high, while releasing the pressure of the refrigerant outlet pipe of the indoor unit through the pressure relief capillary tube 40, the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14 can be opened at the same time, so that the refrigerant in the refrigerant outlet pipe of the indoor unit can quickly migrate to the shell-and-tube condenser 11 and the air-cooled condenser 12, so as to release the pressure in the refrigerant outlet pipe of the indoor unit more quickly.

[0104] In practical applications, the pressure relief capillary tube 40 should be installed as close to the outdoor side as possible. This will significantly reduce the pressure drop across the capillary tube 40 during normal operation of the computer room cooling system, minimizing refrigerant migration and ensuring uninterrupted operation. The pressure relief capillary tube 40 can be connected to a needle valve via a nozzle for easy installation and removal.

[0105] In one example, such as Figure 5 As shown, a pressure relief solenoid valve 50 is installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit. In this case, when the pressure in the refrigerant outlet pipe of the indoor unit is too high, the pressure relief solenoid valve 50 is opened, allowing the refrigerant to migrate to the refrigerant inlet pipe of the indoor unit through the pressure relief solenoid valve 50 to release the pipe pressure; when the pressure in the refrigerant inlet pipe of the indoor unit is too high, the pressure relief solenoid valve 50 is opened, allowing the refrigerant to migrate to the refrigerant outlet pipe of the indoor unit through the pressure relief solenoid valve 50 to release the pipe pressure.

[0106] Of course, it should be noted that when the refrigerant outlet pipe pressure of the indoor unit is too high, while controlling the opening of the pressure relief solenoid valve 50 to release the pressure of the refrigerant outlet pipe of the indoor unit, the shell-and-tube condenser solenoid valve 13 and the air-cooled condenser solenoid valve 14 can also be opened at the same time, so that the refrigerant in the refrigerant outlet pipe of the indoor unit can quickly migrate to the shell-and-tube condenser 11 and the air-cooled condenser 12, so as to release the pressure in the refrigerant outlet pipe of the indoor unit more quickly.

[0107] In practical applications, when the computer room cooling system is running normally, the pressure relief solenoid valve 50 is closed to prevent refrigerant from migrating between the refrigerant outflow pipe and the refrigerant inflow pipe of the indoor unit.

[0108] It should be noted that in the above example, Figures 2-5 The examples shown all depict situations where a pressure relief device is installed in a single location. In practical applications, pressure relief devices can be installed in multiple locations.

[0109] The structure of the data center cooling system provided in this application has been described in detail above with reference to specific embodiments. The control method of the data center cooling system provided in this application will be described in detail below with reference to specific embodiments.

[0110] See Figure 6 The diagram shown is a flowchart of a control method for a computer room cooling system according to an embodiment of this application. The executing entity can be the control center or central control platform of the computer room. The specific implementation process of this method is as follows: S601-S602:

[0111] S601 determines the operating mode of the computer room cooling system.

[0112] In practice, the operating mode of the computer room cooling system can be determined based on user input or by the control platform using methods from relevant technologies. This application does not limit this.

[0113] S602 controls the solenoid valves of the air-cooled condenser and the shell-and-tube condenser according to the operating mode, thereby adjusting the operating mode of the computer room refrigeration system.

[0114] In specific implementation, the operating modes of the data center cooling system provided in this application embodiment include: air-cooled cooling mode and water-cooled cooling mode. Specifically, according to the operating mode, controlling the air-cooled condenser solenoid valve and the shell-and-tube condenser solenoid valve includes: when the operating mode of the data center cooling system is determined to be air-cooled cooling mode, controlling the opening of the air-cooled condenser solenoid valve and the closing of the shell-and-tube condenser solenoid valve; or when the operating mode of the data center cooling system is determined to be water-cooled cooling mode, controlling the closing of the air-cooled condenser solenoid valve and the opening of the shell-and-tube condenser solenoid valve.

[0115] In specific implementation, to avoid excessive pressure in the refrigerant outlet pipe of the indoor unit, this application embodiment can also obtain the pressure value of the refrigerant outlet pipe of the indoor unit, and when the pressure value of the refrigerant outlet pipe of the indoor unit is greater than the first preset pressure threshold, control the opening of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve, and when the pressure value of the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold, control the closing of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve.

[0116] The first preset pressure threshold can be set based on empirical values, and this embodiment does not limit this setting. The pressure value of the refrigerant outlet pipe of the indoor unit can be obtained by installing a pressure sensor in the pipe. Of course, other methods can also be used, and this embodiment does not limit these methods.

[0117] By acquiring the pressure value of the refrigerant outlet pipe of the indoor unit, and controlling the opening of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve when the pressure value of the refrigerant outlet pipe of the indoor unit is greater than the first preset pressure threshold, the problem of the high pressure of the refrigerant outlet pipe of the indoor unit not being able to drop and recover quickly due to the failure of the shell-and-tube condenser solenoid valve or the air-cooled condenser solenoid valve can be avoided.

[0118] In practical applications, excessive pressure in the refrigerant outlet pipe of the indoor unit is usually caused by a malfunction in the solenoid valve of the shell-and-tube condenser or the solenoid valve of the air-cooled condenser. When the pressure in the refrigerant outlet pipe of the indoor unit exceeds the first preset pressure threshold, the solenoid valves of the shell-and-tube condenser and the air-cooled condenser are opened. Then, when the pressure in the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valves of the shell-and-tube condenser and the air-cooled condenser are closed. The faulty solenoid valve is then repaired. After the fault is eliminated, the refrigeration system can be controlled to operate normally.

[0119] In specific implementation, when pressure relief solenoid valves are installed at both ends of the one-way valve of the shell-and-tube condenser and / or at both ends of the one-way valve of the air-cooled condenser, in order to avoid excessive pressure in the refrigerant inflow pipe of the indoor unit, the embodiments of this application can also obtain the pressure value of the refrigerant inflow pipe of the indoor unit, and control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold; and control the closing of the pressure relief solenoid valve when the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold.

[0120] The second preset pressure threshold can be set based on empirical values, and this embodiment does not limit this setting. The pressure value of the refrigerant inflow pipe of the indoor unit can be obtained by installing a pressure sensor in the pipe. Of course, other methods can also be used, and this embodiment does not limit these methods.

[0121] In specific implementation, when a pressure relief solenoid valve is installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit, in order to avoid excessive pressure in the refrigerant inlet pipe and the refrigerant outlet pipe of the indoor unit, the embodiments of this application can also obtain the pressure values ​​of the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit respectively. When the pressure value of the refrigerant outlet pipe of the indoor unit is greater than a first preset pressure threshold and / or the pressure value of the refrigerant inlet pipe of the indoor unit is greater than a second preset pressure threshold, the pressure relief solenoid valve is controlled to open; and when the pressure value of the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold and the pressure value of the refrigerant inlet pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is controlled to close.

[0122] The following is combined with Figure 7 Taking the case where a pressure relief solenoid valve is installed between the refrigerant outflow pipe and the refrigerant inflow pipe of the indoor unit as an example, the specific implementation process of the control method of the computer room refrigeration system provided in this application embodiment will be described in detail.

[0123] like Figure 7 As shown, the specific implementation flow of the control method for the computer room cooling system provided in this application embodiment includes:

[0124] S701 determines the operating mode of the computer room cooling system.

[0125] S702, determine whether the operating mode is water cooling mode. If yes, execute S703; otherwise, execute S704.

[0126] S703 controls the closing of the solenoid valve for the air-cooled condenser and the opening of the solenoid valve for the shell-and-tube condenser.

[0127] S704 controls the opening of the solenoid valve for the air-cooled condenser and the closing of the solenoid valve for the shell-and-tube condenser.

[0128] S705, respectively obtains the pressure value of the refrigerant outflow pipe of the indoor unit and the pressure value of the refrigerant inflow pipe of the indoor unit.

[0129] S706: Determine whether the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold. If yes, execute S708; otherwise, execute S707.

[0130] S707: Determine whether the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold. If yes, execute S708; otherwise, execute S709.

[0131] S708: When the pressure relief solenoid valve is closed, control the opening of the pressure relief solenoid valve; when the pressure relief solenoid valve is open, maintain the open state of the pressure relief solenoid valve and continue to execute S705.

[0132] S709: When the pressure relief solenoid valve is in the open state, control the pressure relief solenoid valve to close; when the pressure relief solenoid valve is in the closed state, keep the pressure relief solenoid valve in the closed state and continue to execute S705.

[0133] like Figure 8 As shown, this application embodiment provides a control device for a computer room cooling system, applied to the cooling system provided in this application embodiment. The device includes:

[0134] The first control module 801 is used to determine the operating mode of the computer room cooling system, and according to the operating mode, control the solenoid valve of the air-cooled condenser and the solenoid valve of the shell and tube condenser to adjust the operating mode of the computer room cooling system.

[0135] The acquisition module 802 is used to acquire the pressure value of the refrigerant outflow pipe of the indoor unit;

[0136] The second control module 803 is used to control the opening of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve when the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold.

[0137] In one possible implementation, the second control module 803 is further configured to:

[0138] When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are closed.

[0139] In one possible implementation, pressure relief solenoid valves are provided at both ends of the shell-and-tube condenser check valve and / or at both ends of the air-cooled condenser check valve.

[0140] The acquisition module 802 is also used to: acquire the pressure value of the refrigerant inflow pipe of the indoor unit;

[0141] The second control module 803 is also used to: control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold; or

[0142] When the pressure in the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

[0143] In one possible implementation, a pressure relief solenoid valve is provided between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit.

[0144] The acquisition module 802 is also used to: acquire the pressure value of the refrigerant inflow pipe of the indoor unit;

[0145] The second control module 803 is further configured to: control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant outlet pipe of the indoor unit is greater than a first preset pressure threshold, and / or the pressure value of the refrigerant inlet pipe of the indoor unit is greater than a second preset pressure threshold; or

[0146] When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

[0147] Based on the same concept, this application also provides an electronic device. The principle of the device in solving the problem is similar to that of the method described above. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0148] like Figure 9 As shown in the illustration, an electronic device provided in this application includes: a processor 901; and a memory 902 for storing executable instructions of the processor 901; wherein the processor 901 executes the executable instructions to perform the following steps:

[0149] Determine the operating mode of the computer room cooling system;

[0150] Based on the operating mode, control the solenoid valves of the air-cooled condenser and the shell-and-tube condenser to adjust the operating mode of the computer room refrigeration system.

[0151] In one possible implementation, the operating modes include air-cooled cooling mode and water-cooled cooling mode;

[0152] Processor 901 is specifically configured to execute:

[0153] When the computer room cooling system is set to air-cooled mode, control the opening of the air-cooled condenser solenoid valve and the closing of the shell-and-tube condenser solenoid valve; or

[0154] When the operating mode of the computer room cooling system is determined to be water-cooled, the solenoid valve of the air-cooled condenser is closed and the solenoid valve of the shell-and-tube condenser is opened.

[0155] In one possible implementation, processor 901 is also configured to perform:

[0156] Obtain the pressure value of the refrigerant outlet pipe of the indoor unit;

[0157] When the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are opened.

[0158] In one possible implementation, processor 901 is also configured to perform:

[0159] When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are closed.

[0160] In one possible implementation, processor 901 is also configured to perform:

[0161] When a pressure relief solenoid valve is installed at both ends of the one-way valve of the shell-and-tube condenser and / or at both ends of the one-way valve of the air-cooled condenser, the pressure value of the refrigerant inflow pipe of the indoor unit is obtained.

[0162] When the pressure in the refrigerant inlet pipe of the indoor unit exceeds the second preset pressure threshold, the pressure relief solenoid valve is opened; or

[0163] When the pressure in the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

[0164] In one possible implementation, processor 901 is also configured to perform:

[0165] With a pressure relief solenoid valve installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit, the pressure values ​​of the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit are obtained respectively.

[0166] When the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold, and / or the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold, the pressure relief solenoid valve is opened.

[0167] In one possible implementation, processor 901 is also configured to perform:

[0168] When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

[0169] Based on the same inventive concept, this disclosure provides a computer storage medium comprising: computer program code, which, when executed on a computer, causes the computer to perform any of the control methods for a data center cooling system discussed above. Since the principle by which the computer storage medium solves the problem is similar to the control method for a data center cooling system, the implementation of the computer storage medium can be found in the implementation of the method; repeated details will not be elaborated further.

[0170] In specific implementation, computer storage media can include: Universal Serial Bus Flash Drive (USB), portable hard drive, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk, and other storage media that can store program code.

[0171] Based on the same inventive concept, this disclosure also provides a computer program product, which includes computer program code. When the computer program code is run on a computer, it causes the computer to execute any of the control methods for a data center cooling system discussed above. Since the principle by which the above-described computer program product solves the problem is similar to that of the control method for a data center cooling system, the implementation of the above-described computer program product can be referred to the implementation of the method, and repeated details will not be described again.

[0172] Computer program products may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0173] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0174] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 Devices that specify the functions in one or more boxes.

[0175] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction device, which is implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0176] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the functions specified in one or more boxes. Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, this application also intends to include such modifications and variations if they fall within the scope of the claims of this application and their equivalents.

Claims

1. A computer room cooling system, characterized in that, The system includes: an indoor unit, a shell-and-tube condenser, an air-cooled condenser, a shell-and-tube condenser solenoid valve, an air-cooled condenser solenoid valve, a shell-and-tube condenser check valve, an air-cooled condenser check valve, and a pump. The refrigerant outlet pipe of the indoor unit is connected to the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve via a T-connector. The shell-and-tube condenser solenoid valve is connected to the shell-and-tube condenser check valve via the shell-and-tube condenser. The air-cooled condenser solenoid valve is connected to the air-cooled condenser check valve via the air-cooled condenser. The shell-and-tube condenser check valve and the air-cooled condenser check valve are connected to one end of the pump via a T-connector. The other end of the pump is connected to the refrigerant inlet pipe of the indoor unit.

2. The system according to claim 1, characterized in that, The system further includes a pressure relief device, located at one or more of the following locations: Both ends of the one-way valve of the shell-and-tube condenser; Both ends of the one-way valve of the air-cooled condenser; Between the refrigerant outflow pipe and the refrigerant inflow pipe of the indoor unit.

3. The system according to claim 2, characterized in that, The pressure relief device includes: a pressure relief solenoid valve or a pressure relief capillary tube.

4. A control method for a computer room cooling system, applied to the computer room cooling system according to any one of claims 1-3, characterized in that, The method includes: Determine the operating mode of the computer room cooling system; According to the operating mode, the solenoid valves of the air-cooled condenser and the shell-and-tube condenser are controlled to adjust the operating mode of the computer room refrigeration system.

5. The method according to claim 4, characterized in that, The operating modes include air-cooled cooling mode and water-cooled cooling mode; The step of controlling the solenoid valve of the air-cooled condenser and the solenoid valve of the shell-and-tube condenser according to the operating mode includes: When the operating mode of the computer room cooling system is determined to be the air-cooled cooling mode, the solenoid valve of the air-cooled condenser is opened and the solenoid valve of the shell-and-tube condenser is closed; or When the operating mode of the computer room cooling system is determined to be the water-cooled cooling mode, the solenoid valve of the air-cooled condenser is closed and the solenoid valve of the shell-and-tube condenser is opened.

6. The method according to claim 4, characterized in that, The method further includes: Obtain the pressure value of the refrigerant outlet pipe of the indoor unit; When the pressure value of the refrigerant outlet pipe of the indoor unit is greater than the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are opened.

7. The method according to claim 6, characterized in that, The method further includes: When the pressure value of the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are closed.

8. The method according to claim 4, characterized in that, The method further includes: When a pressure relief solenoid valve is provided at both ends of the shell-and-tube condenser check valve and / or at both ends of the air-cooled condenser check valve, the pressure value of the refrigerant inflow pipe of the indoor unit is obtained. When the pressure in the refrigerant inlet pipe of the indoor unit exceeds a second preset pressure threshold, the pressure relief solenoid valve is opened; or When the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

9. The method according to claim 4, characterized in that, The method further includes: When a pressure relief solenoid valve is installed between the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit, the pressure values ​​of the refrigerant outlet pipe and the refrigerant inlet pipe of the indoor unit are obtained respectively. When the pressure value of the refrigerant outflow pipe of the indoor unit is greater than the first preset pressure threshold, and / or the pressure value of the refrigerant inflow pipe of the indoor unit is greater than the second preset pressure threshold, the pressure relief solenoid valve is opened.

10. The method according to claim 9, characterized in that, The method further includes: When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is controlled to close.

11. A control device for a computer room cooling system, applied to the computer room cooling system according to any one of claims 1-3, characterized in that, The device includes: The first control module is used to determine the operating mode of the computer room cooling system, and according to the operating mode, control the solenoid valve of the air-cooled condenser and the solenoid valve of the shell and tube condenser to adjust the operating mode of the computer room cooling system. The acquisition module is used to acquire the pressure value of the refrigerant outlet pipe of the indoor unit; The second control module is used to control the opening of the shell-and-tube condenser solenoid valve and the air-cooled condenser solenoid valve when the pressure value of the refrigerant outlet pipe of the indoor unit is greater than the first preset pressure threshold.

12. The apparatus according to claim 11, characterized in that, The second control module is also used for: When the pressure value of the refrigerant outlet pipe of the indoor unit is less than or equal to the first preset pressure threshold, the solenoid valve of the shell-and-tube condenser and the solenoid valve of the air-cooled condenser are closed.

13. The apparatus according to claim 11, characterized in that, Pressure relief solenoid valves are provided at both ends of the shell-and-tube condenser check valve and / or at both ends of the air-cooled condenser check valve. The acquisition module is further configured to: acquire the pressure value of the refrigerant inflow pipe of the indoor unit; The second control module is further configured to: control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant inflow pipe of the indoor unit is greater than a second preset pressure threshold; or When the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is closed.

14. The apparatus according to claim 11, characterized in that, A pressure relief solenoid valve is installed between the refrigerant outflow pipe and the refrigerant inflow pipe of the indoor unit; The acquisition module is further configured to: acquire the pressure value of the refrigerant inflow pipe of the indoor unit; The second control module is further configured to: control the opening of the pressure relief solenoid valve when the pressure value of the refrigerant outflow pipe of the indoor unit is greater than a first preset pressure threshold, and / or the pressure value of the refrigerant inflow pipe of the indoor unit is greater than a second preset pressure threshold; or When the pressure value of the refrigerant outflow pipe of the indoor unit is less than or equal to the first preset pressure threshold, and the pressure value of the refrigerant inflow pipe of the indoor unit is less than or equal to the second preset pressure threshold, the pressure relief solenoid valve is controlled to close.

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