Liquid cooling system, liquid cooling cabinet, control method, electronic equipment and storage medium

Abstract

The present application relates to the field of heat dissipation technology, and provides a liquid cooling system, a liquid cooling cabinet, a control method, an electronic device, and a storage medium. In the liquid cooling system, an air-to-liquid heat exchanger, a first control valve, and a liquid-to-liquid heat exchanger are sequentially connected in series on the first liquid cooling branch; one end of the second liquid cooling branch is connected between the first control valve and the air-to-liquid heat exchanger, the other end of the second liquid cooling branch is connected to the liquid outlet of the liquid-to-liquid heat exchanger, and the second liquid cooling branch has a second control valve; one end of the third liquid cooling branch is connected to the liquid inlet of the air-to-liquid heat exchanger, the other end of the third liquid cooling branch is connected between the first control valve and the liquid-to-liquid heat exchanger, and the third liquid cooling branch has a third control valve. The liquid cooling system provided by the present application has simple piping, and the liquid-to-liquid heat exchanger and the air-to-liquid heat exchanger share a set of liquid cooling systems. Three control valves are provided in the liquid cooling piping, which can flexibly adjust the way in which the coolant passes through the liquid-to-liquid heat exchanger and the air-to-liquid heat exchanger, thereby saving energy to the greatest extent.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a liquid cooling system, a liquid cooling cabinet, a control method, an electronic device, and a storage medium. Background Art

[0002] Liquid cooling technology uses liquid instead of air as a refrigerant to exchange heat with heat-generating components and remove heat. Due to its high cooling efficiency, liquid cooling is often used for heat dissipation in servers.

[0003] However, for servers, liquid cooling alone cannot meet cooling requirements: some components in servers cannot be cooled using liquid cooling. Therefore, in such cases, conventional air-cooling systems are still used to remove heat from the server through the server's fans.

[0004] Therefore, current cold storage rooms typically include two cooling systems or pipelines: one for liquid cooling and the other for air cooling. This results in complex cooling system piping connections, making installation and maintenance difficult. Furthermore, the air cooling system requires an additional cooling source, increasing energy consumption. Summary of the Invention

[0005] The embodiments of the present application provide a liquid cooling system, a liquid cooling cabinet, a control method, an electronic device, and a storage medium to solve the technical problems in the prior art of complex system pipe connections and high cold source energy consumption.

[0006] In a first aspect, an embodiment of the present application provides a liquid cooling system, comprising:

[0007] The first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; the first liquid cooling branch has a liquid inlet and a liquid outlet, and the first liquid cooling branch is connected in series with an air-liquid heat exchanger, a first control valve and a liquid cooling heat exchanger; the first control valve is used to control the on-off of the first liquid cooling branch; one end of the second liquid cooling branch is connected between the first control valve and the air-liquid heat exchanger, and the other end of the second liquid cooling branch is connected to the liquid outlet of the liquid cooling heat exchanger. The second liquid cooling branch has a second control valve, and the second control valve is used to control the on-off of the second liquid cooling branch; one end of the third liquid cooling branch is connected to the liquid inlet of the air-liquid heat exchanger, and the other end of the third liquid cooling branch is connected between the first control valve and the liquid cooling heat exchanger. The third liquid cooling branch has a third control valve, and the third control valve is used to control the on-off of the third liquid cooling branch. In one embodiment, the liquid cooling system also includes a liquid cooling circulation loop, and the coolant in the liquid cooling circulation loop exchanges heat in the liquid cooling heat exchanger. The liquid cooling circulation loop has a first liquid pump and at least one cold plate.

[0008] In one embodiment, the liquid cooling system also includes: a first temperature sensor, arranged at the inlet of the liquid cooling circulation loop, for detecting the coolant temperature at the inlet of the liquid cooling circulation loop; and / or, a second temperature sensor, arranged at the outlet of the cold circulation loop, for detecting the coolant temperature at the outlet of the cold circulation loop; wherein the inlet of the liquid cooling circulation loop is the initial position of the liquid cooling circulation loop passing through the liquid cooling heat exchanger, and the outlet of the cold circulation loop is the end position of the liquid cooling circulation loop passing through the liquid cooling heat exchanger.

[0009] In one embodiment, the liquid cooling system further includes: a third temperature sensor, disposed at the liquid inlet, for detecting the coolant temperature at the liquid inlet; and / or a fourth temperature sensor, disposed at the liquid outlet, for detecting the coolant temperature at the liquid outlet.

[0010] In one embodiment, the liquid cooling system further includes: a fifth temperature sensor, disposed on the air-to-liquid heat exchanger, for detecting the temperature of the air-to-liquid heat exchanger.

[0011] In one embodiment, the liquid cooling system further includes: a flow regulating valve, disposed at the liquid inlet, for controlling the flow of the coolant at the liquid inlet.

[0012] In one embodiment, the liquid cooling system further comprises: a first cooling branch, one end of the first cooling branch being connected to the liquid inlet and the other end being connected to the liquid outlet, the first cooling branch being connected in series with a first refrigeration module and a second liquid pump. In one embodiment, the liquid cooling system further comprises:

[0013] A fourth control valve is connected in series on the first cooling branch, and the fourth control valve is connected in series between the first refrigeration module and the second liquid pump; the liquid cooling system also includes a second cooling branch, one end of the second cooling branch is connected between the liquid outlet of the first refrigeration module and the fourth control valve, and the other end of the second cooling branch is connected between the liquid inlet of the second liquid pump and the fourth control valve, and the second cooling branch is connected in series with the second refrigeration module and the fifth control valve.

[0014] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller.

[0015] In one embodiment, the liquid cooling system further includes: a sixth temperature sensor, disposed at the outlet of the second liquid pump, for detecting an actual water supply temperature.

[0016] In one embodiment, the liquid cooling system further includes an outdoor temperature sensor for monitoring an outdoor dry-bulb temperature and an outdoor wet-bulb temperature.

[0017] In a second aspect, an embodiment of the present application provides a liquid cooling cabinet, comprising a cabinet body and the above-mentioned liquid cooling system.

[0018] In one embodiment, the liquid-cooled heat exchanger is arranged on the inner bottom side of the cabinet body, and the air-liquid heat exchanger is arranged on the inner front side or inner rear side of the cabinet body; the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch are arranged inside the cabinet body.

[0019] In a third aspect, an embodiment of the present application provides a method for controlling a liquid cooling system, comprising: obtaining a first temperature and / or a second temperature; the first temperature is the coolant temperature at the inlet of the liquid cooling circulation loop, and the second temperature is the coolant temperature at the outlet of the liquid cooling circulation loop; wherein, the liquid cooling circulation loop passes through a liquid cooling heat exchanger and at least one cold plate; when the first temperature is less than or equal to a first preset temperature, or the second temperature is less than or equal to a second preset temperature, the liquid cooling system is controlled to be in a series mode; when the first temperature is greater than the first preset temperature, or the second temperature is greater than the second preset temperature, the liquid cooling system is controlled to be in a parallel mode; wherein, when the liquid cooling system is in the series mode, the coolant in the liquid cooling system passes through the air-to-liquid heat exchanger and the liquid-to-cooled heat exchanger in sequence through the first liquid cooling branch; when the liquid cooling system is in the parallel mode, the coolant in the liquid cooling system passes through the air-to-liquid heat exchanger through the second liquid cooling branch, and the coolant in the liquid cooling system passes through the liquid cooling heat exchanger through the third liquid cooling branch.

[0020] In one embodiment, controlling the liquid cooling system in series mode includes: controlling the first control valve to open, and the second control valve and the third control valve to close; controlling the liquid cooling system in parallel mode includes: controlling the first control valve to close, and the second control valve and the third control valve to open; wherein, the first control valve is set in the first liquid cooling branch, the second control valve is set in the second liquid cooling branch, and the third control valve is set in the third liquid cooling branch.

[0021] In one embodiment, when the first temperature is less than or equal to the first preset temperature, or the second temperature is less than or equal to the second preset temperature, the liquid cooling system is controlled to be in series mode, including: when the duration of the first temperature being less than or equal to the first preset temperature exceeds the first buffer time, or when the duration of the second temperature being less than or equal to the second preset temperature exceeds the first buffer time, the liquid cooling system is controlled to be in series mode; when the first temperature is greater than the first preset temperature, or the second temperature is greater than the second preset temperature, the liquid cooling system is controlled to be in parallel mode, including: when the duration of the first temperature being greater than the first preset temperature exceeds the second buffer time, or when the duration of the second temperature being greater than the second preset temperature exceeds the second buffer time, the liquid cooling system is controlled to be in parallel mode.

[0022] In one embodiment, the control method of the liquid cooling system also includes: when the refrigeration module of the liquid cooling system does not meet the preset refrigeration requirements, controlling the liquid cooling system to be in emergency mode; when the liquid cooling system is in emergency mode, the first control valve and the second control valve are closed, and the third control valve is opened, and the coolant in the liquid cooling system passes through the liquid cooling heat exchanger through the third liquid cooling branch.

[0023] In one embodiment, the control method of the liquid cooling system further includes: controlling the opening of a flow regulating valve of the liquid inlet to adjust the flow of the incoming coolant.

[0024] In one embodiment, after obtaining the first temperature and / or the second temperature, it also includes: obtaining a detection temperature; controlling the coolant flow rate at the liquid inlet according to at least one of the detection temperature, the first temperature and the second temperature; wherein the detection temperature is at least one of the third temperature, the fourth temperature and the fifth temperature, the third temperature is the coolant temperature at the liquid inlet, the fourth temperature is the coolant temperature at the liquid outlet, and the fifth temperature is the temperature of the air-to-liquid heat exchanger.

[0025] In one embodiment, the coolant flow rate at the liquid inlet is controlled based on at least one of the detected temperature, the first temperature, and the second temperature, including: when the first temperature is less than or equal to the third preset temperature, or the second temperature is less than or equal to the fourth preset temperature, reducing the opening of the flow regulating valve at the liquid inlet so that the incoming coolant flow rate becomes smaller; when the first temperature is greater than the third preset temperature, or the second temperature is greater than the fourth preset temperature, increasing the opening of the flow regulating valve at the liquid inlet so that the incoming coolant flow rate becomes larger.

[0026] In one embodiment, the control method of the liquid cooling system also includes: obtaining the sixth temperature of the coolant in the water outlet of the liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; when the sixth temperature is less than or equal to the fifth preset temperature, controlling the first refrigeration module to work and the second refrigeration module not to work; when the sixth temperature is greater than the fifth preset temperature, controlling the first refrigeration module and the second refrigeration module to work.

[0027] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; the control method of the liquid cooling system also includes: obtaining the sixth temperature of the coolant in the water outlet of the liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; when the sixth temperature is less than or equal to the fifth preset temperature, the fan module of the closed cooling tower is controlled to work, and the spray module and the chiller of the closed cooling tower are not operated; when the duration of the sixth temperature being greater than the fifth preset temperature does not exceed the third buffer time, the fan module and the spray module of the closed cooling tower are controlled to work, and the chiller is not operated; when the duration of the sixth temperature being greater than the fifth preset temperature exceeds the third buffer time, the fan module, the spray module and the chiller of the closed cooling tower are controlled to work.

[0028] In one embodiment, the control method of the liquid cooling system also includes: obtaining the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature of the coolant in the liquid pump outlet, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; and controlling the working conditions of the first refrigeration module and the second refrigeration module according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature.

[0029] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; and the operation of the first refrigeration module and the second refrigeration module is controlled according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the sixth temperature, including:

[0030] When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to the fifth preset temperature, and the sixth temperature is less than or equal to the fifth preset temperature, the fan module of the closed cooling tower is controlled to work, and the spray module and the chiller of the closed cooling tower are not operated.

[0031] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; and the operation of the first refrigeration module and the second refrigeration module is controlled according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the sixth temperature, including:

[0032] When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to the fifth preset temperature, the sixth temperature is greater than the fifth preset temperature, and the outdoor dry-bulb temperature is greater than zero degrees, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller does not operate.

[0033] In one embodiment, when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to a fifth preset temperature, the sixth temperature is greater than the fifth preset temperature, and the outdoor dry-bulb temperature is greater than zero degrees, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller is stopped, further comprising:

[0034] When the sixth temperature is greater than the fifth preset temperature for a duration exceeding the third buffer time, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

[0035] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature, the working conditions of the first refrigeration module and the second refrigeration module are controlled, including: when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is less than or equal to the preset temperature, and the sixth temperature is less than or equal to the fifth preset temperature, the fan module and the spray module of the closed cooling tower are controlled to work, and the chiller is not operated.

[0036] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature, the working conditions of the first refrigeration module and the second refrigeration module are controlled, including: when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is less than or equal to the preset temperature, and the sixth temperature is greater than the fifth preset temperature, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

[0037] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature, the working conditions of the first refrigeration module and the second refrigeration module are controlled, including: when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, and the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is greater than the preset temperature, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

[0038] In a fourth aspect, an embodiment of the present application provides an electronic device comprising a processor and a memory storing a computer program, wherein when the processor executes the program, the steps of the method for controlling the liquid cooling system described in the second aspect are implemented.

[0039] In a fifth aspect, an embodiment of the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the control method of the liquid cooling system described in the second aspect.

[0040] The liquid cooling system, liquid cooling cabinet, control method, electronic device and storage medium provided by the embodiment of the present application are as follows: the first liquid cooling branch is provided with a first control valve; the second liquid cooling branch is provided with a second control valve; the third liquid cooling branch is provided with a third control valve; the first liquid cooling branch passes through the liquid cooling heat exchanger and the air-liquid heat exchanger, the second liquid cooling branch passes through the air-liquid heat exchanger, and the third liquid cooling branch passes through the liquid cooling heat exchanger. Through the above method, the liquid cooling system provided by the present application has a simple pipeline, the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch share a liquid inlet and a liquid outlet, the liquid cooling heat exchanger and the air-liquid heat exchanger share a set of liquid cooling system, and the air-liquid heat exchanger can also take away its own heat through the liquid cooling pipe; and three control valves are provided in the liquid cooling pipe, and the three control valves can flexibly adjust the way the coolant passes through the liquid cooling heat exchanger and the air-liquid heat exchanger, giving full play to the heat dissipation advantage of the liquid cooling system and saving energy to the maximum extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 is a schematic structural diagram of a liquid cooling system provided in an embodiment of the present application;

[0043] FIG2( a ) is a schematic diagram showing the structure of the liquid cooling pipe connection mode in the liquid cooling system provided by an embodiment of the present application, wherein the liquid cooling pipes are in series mode;

[0044] FIG2( b ) is a schematic structural diagram of a liquid cooling pipe connection mode in a liquid cooling system provided in an embodiment of the present application, wherein the liquid cooling pipes are in parallel mode;

[0045] FIG2( c ) is a schematic structural diagram of a liquid cooling pipe connection mode in a liquid cooling system provided by an embodiment of the present application, wherein the liquid cooling pipe is in emergency mode;

[0046] Figure 3 This is the second structural diagram of the liquid cooling system provided in the embodiment of the present application;

[0047] Figure 4 This is a control method for a liquid cooling system provided in an embodiment of the present application;

[0048] Figure 5 This is a schematic diagram of the structure of the pipeline on one side of the cabinet provided in an embodiment of the present application;

[0049] Figure 6 Schematic diagram of the structure of the secondary side pipeline provided in the embodiment of the present application;

[0050] Figure 7 This is a schematic diagram of the structure of the primary side pipeline outside the cabinet provided in an embodiment of the present application;

[0051] Figure 8 It is a schematic diagram of the physical structure of the electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] See also Figure 1 , Figure 1 Schematic diagram of the structure of the liquid cooling system provided in an embodiment of the present application. In this embodiment, the liquid cooling system may include a first liquid cooling branch, a second liquid cooling branch, and a third liquid cooling branch.

[0054] The first liquid cooling branch has a liquid inlet and a liquid outlet. The first liquid cooling branch is connected in series with an air-to-liquid heat exchanger 110, a first control valve C1 and a liquid cooling heat exchanger 120. The first control valve C1 is used to control the on / off of the first liquid cooling branch.

[0055] One end of the second liquid cooling branch is connected between the first control valve C1 and the air-to-liquid heat exchanger 110, and the other end is connected to the liquid outlet of the liquid cooling heat exchanger 120. The second liquid cooling branch has a second control valve C2, which is used to control the on / off of the second liquid cooling branch.

[0056] One end of the third liquid cooling branch is connected to the liquid inlet end of the air-liquid heat exchanger 110, and the other end of the third liquid cooling branch is connected between the first control valve C1 and the liquid cooling heat exchanger 120. The third liquid cooling branch has a third control valve C3, which is used to control the on and off of the third liquid cooling branch.

[0057] The first liquid cooling branch passes through the liquid cooling heat exchanger 120 and the air-to-liquid heat exchanger 110, the second liquid cooling branch passes through the air-to-liquid heat exchanger 110, and the third liquid cooling branch passes through the liquid cooling heat exchanger 120. The second liquid cooling branch does not pass through the liquid cooling heat exchanger 120, and the third liquid cooling branch does not pass through the air-to-liquid heat exchanger 110.

[0058] In this embodiment, the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch share a liquid inlet and a liquid outlet, and the liquid cooling heat exchanger 120 and the air-liquid heat exchanger 110 share a liquid cooling system. The pipeline design of the liquid cooling system is simple and easy to install and maintain.

[0059] Alternatively, the control valve may be an electric valve, which can use an electric actuator to control the valve, thereby realizing the opening and closing of the valve.

[0060] A heat exchanger, also known as a heat exchanger, is a device that transfers heat from a higher-temperature fluid to a lower-temperature fluid. The liquid-cooled heat exchanger 120 is used to store heat absorbed from the device being cooled using liquid cooling technology, while the air-to-liquid heat exchanger 110 is used to store heat absorbed from the device being cooled using air cooling technology.

[0061] Air cooling technology uses air as a medium to cool the object being cooled. This is typically accomplished by increasing the surface area of ​​the object being cooled or by increasing the rate at which air flows through the object per unit time. In this embodiment, fans are used to enhance ventilation and cooling. In some embodiments, heat sinks can be added to significantly improve cooling efficiency.

[0062] Optionally, the heat in the device to be dissipated is brought into the air-to-liquid heat exchanger by a fan using air.

[0063] Liquid cooling technologies include immersion and cold plate cooling. Immersion cooling involves immersing heat-generating components in liquid, allowing for direct heat exchange. Cold plate cooling utilizes a working fluid as an intermediate heat transfer medium, transferring heat from the hot zone to a distant location before cooling. In this technology, the working fluid is separated from the object being cooled and does not come into direct contact with the electronic device. Instead, the working fluid transfers heat from the object being cooled to the coolant via efficient heat-conducting components such as cold plates. Therefore, cold plate cooling is also known as indirect liquid cooling.

[0064] Optionally, the heat in the device to be dissipated is brought into the liquid-cooled heat exchanger through the cold plate and the working liquid.

[0065] In this embodiment, the three control valves can be used to flexibly adjust the way the coolant passes through the liquid-cooled heat exchanger and the air-to-liquid heat exchanger. Specifically, the control methods of the three control valves can be divided into three types, and the liquid cooling pipe connection modes can also be divided into three types. Figures 2(a) to 2(c) , Figures 2(a) to 2(c) It is a structural schematic diagram of the liquid cooling pipe connection mode in the liquid cooling system provided in an embodiment of the present application.

[0066] (1) Series mode: the first control valve C1 is open, and the second control valve C2 and the third control valve C3 are closed.

[0067] As shown in Figure 2(a), the liquid cooling pipeline is in series operation. The first liquid cooling branch is conductive, while the second liquid cooling branch and the second liquid cooling branch are not conductive. Coolant entering from the liquid inlet enters the first liquid cooling branch, which then passes through air-to-liquid heat exchanger 110 and liquid-to-cooled heat exchanger 120, removing heat from the liquid-to-cooled heat exchanger and the air-to-liquid heat exchanger, respectively. The liquid-to-cooled heat exchanger and the air-to-liquid heat exchanger can be considered to be connected in series for heat dissipation.

[0068] In series mode, the coolant first absorbs heat from air-to-liquid heat exchanger 110, then, after reaching a certain temperature, passes through liquid-cooled heat exchanger 120, where it absorbs heat from the latter. After further heating, it flows out through the outlet for dissipation. By properly setting the temperature gradient, series mode fully utilizes the cooling energy, significantly saving energy.

[0069] (2) Parallel mode: the second control valve C2 and the third control valve C3 are open, and the first control valve C1 is closed.

[0070] As shown in Figure 2(b), the liquid cooling pipes are in parallel operation. The second and third liquid cooling branches are connected, while the first liquid cooling branch is disconnected. Coolant entering from the liquid inlet flows into both the second and third liquid cooling branches. The second liquid cooling branch passes through air-to-liquid heat exchanger 110 to remove heat from the air-to-liquid heat exchanger, while the third liquid cooling branch passes through liquid-to-liquid heat exchanger 120 to remove heat from the air-to-liquid heat exchanger. Liquid-to-liquid heat exchanger 120 and air-to-liquid heat exchanger 110 can be considered to be connected in parallel for heat dissipation.

[0071] In parallel mode, the coolant is split into two paths, absorbing heat from the air-to-liquid heat exchanger 110 and the liquid-cooled heat exchanger 120, respectively. Both paths are heated to varying degrees before being combined into one path that flows out of the outlet. Compared to series mode, parallel mode provides coolant at a lower temperature to the liquid-cooled heat exchanger, ensuring optimal heat transfer.

[0072] (3) Emergency mode: The third control valve C3 is open, and the first control valve C1 and the second control valve C2 are closed.

[0073] As shown in Figure 2(c), the liquid cooling pipeline is in emergency mode. The third liquid cooling branch is connected, while the second and third liquid cooling branches are disconnected. Coolant entering from the liquid inlet enters the third liquid cooling branch, which then passes through liquid cooling heat exchanger 120 to remove heat from the liquid cooling heat exchanger 120.

[0074] In emergency mode, coolant is transferred solely to the liquid-cooled heat exchanger via the third liquid cooling branch. This mode is intended for emergency cooling situations. It activates when the cooling module in the liquid cooling system fails to meet preset cooling requirements, prioritizing heat dissipation from the liquid-cooled heat exchanger.

[0075] As described above, by opening and closing the three control valves, various connection modes of the liquid cooling pipeline can be realized: in series mode, the utilization efficiency of the cooling capacity can be improved; in parallel mode, the heat exchange effect of the liquid cooling heat exchanger can be guaranteed; in emergency mode, the heat dissipation of the main components can be prioritized; the liquid cooling system can flexibly select different modes, which can not only improve the utilization efficiency of the cooling capacity, but also ensure the heat dissipation effect.

[0076] In summary, the liquid cooling system provided in this embodiment has a simple piping design. The liquid-cooled heat exchanger and the air-liquid heat exchanger share a liquid cooling system for heat exchange. The air-liquid heat exchanger can also remove its own heat through the liquid cooling pipe. Moreover, the three control valves can flexibly adjust the way the coolant passes through the liquid-cooled heat exchanger and the air-liquid heat exchanger, giving full play to the heat dissipation advantages of the liquid cooling system and maximizing energy savings.

[0077] In one embodiment, the liquid cooling system further comprises a liquid cooling circulation loop, wherein the coolant in the liquid cooling circulation loop exchanges heat in a liquid cooling heat exchanger, and the liquid cooling circulation loop comprises a first liquid pump and at least one cold plate. Optionally, when the liquid cooling circulation loop comprises one cold plate, the first liquid pump and the liquid cooling are connected in series within the liquid cooling circulation loop. When the cold plate circulation loop comprises at least two cold plates, the at least two cold plates can be considered to constitute a cold plate module, wherein the cold plate module and the first liquid pump are connected in series within the liquid cooling circulation loop, and the at least two cold plates within the cold plate module can be connected in series or in parallel.

[0078] See also Figure 3 , Figure 3 This is the second structural diagram of the liquid cooling system provided in the embodiment of the present application. The cold plate 130 can be set in the device to be cooled. The cold plate 130 can absorb the heat of the device to be cooled and pass the liquid cooling circuit (such as Figure 3 The heat absorbed by the cold plate 130 can be transferred to the liquid-cooled heat exchanger 120 (shown by the dotted line). The first liquid pump W1 is used to provide power for the flow of the coolant in the liquid-cooled circulation loop.

[0079] It should be noted that the liquid cooling circuit and the three liquid cooling branches are independent of each other. The coolant in the liquid cooling circuit flows only within the liquid cooling circuit and does not enter the first, second, or third liquid cooling branches. Similarly, the coolant in the first, second, and third liquid cooling branches does not enter the liquid cooling circuit.

[0080] As described above, the provision of the liquid cooling circulation loop can increase the heat dissipation area of ​​the liquid cooling circulation loop.

[0081] In one embodiment, the liquid cooling system further includes a flow regulating valve.

[0082] The flow regulating valve is arranged at the liquid inlet and is used to control the flow of the coolant at the liquid inlet.

[0083] Specifically, the flow rate of coolant entering the liquid inlet can be properly distributed by controlling the opening of the flow control valve. When the opening of the flow control valve is increased, the flow rate of coolant entering the liquid inlet increases; when the opening of the flow control valve is decreased, the flow rate of coolant entering the liquid inlet decreases.

[0084] In one embodiment, the liquid cooling system further includes a first cooling branch, one end of the first cooling branch is connected to the liquid inlet, and the other end is connected to the liquid outlet, and the first cooling module and the second liquid pump are connected in series on the first cooling branch.

[0085] like Figure 3 As shown, since the coolant in the liquid cooling branch takes away the heat from the liquid cooling heat exchanger 120 and the air-liquid heat exchanger 110, the coolant temperature at the liquid outlet is higher than the temperature at the liquid inlet. In order to enable the liquid cooling system to circulate heat, it is necessary to cool the heated coolant through the first cooling branch.

[0086] The first cooling module 140 is used to cool the cooling liquid passing through it. The second liquid pump W2 is used to provide power for the cooling liquid to flow in the first cooling branch.

[0087] It should be noted that the first cooling branch and the three liquid cooling branches are connected through the liquid inlet and outlet, so the coolant in the first cooling branch can flow in the three liquid cooling branches.

[0088] In one embodiment, the liquid cooling system also includes: a fourth control valve is connected in series on the first cooling branch, and the fourth control valve is connected in series between the first refrigeration module and the second liquid pump; the liquid cooling system also includes a second cooling branch, one end of the second cooling branch is connected between the liquid outlet of the first refrigeration module and the fourth control valve, and the other end of the second cooling branch is connected between the liquid inlet of the second liquid pump and the fourth control valve, and the second cooling branch is connected in series with a second refrigeration module and a fifth control valve.

[0089] Continue reading Figure 3 To ensure effective heat dissipation, the liquid cooling system also includes a second cooling module 150, which cools the coolant passing through it, further reducing the coolant temperature at the inlet. Furthermore, to conserve energy, a fourth control valve C4 and a fifth control valve C5 are provided to control the operating conditions of the first and second cooling modules 140 and 150.

[0090] In this embodiment, when the cooling effect of the first refrigeration module 140 can meet the preset cooling requirements of the liquid cooling system, the fourth control valve C4 is opened, the fifth control valve C5 is closed, the first refrigeration module 140 works, and the second refrigeration module 150 does not work; when the cooling effect of the first refrigeration module 140 cannot meet the preset cooling requirements of the liquid cooling system, the fourth control valve C4 is closed, the fifth control valve C5 is opened, and both the first refrigeration module 140 and the second refrigeration module 150 work.

[0091] Optionally, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller. The closed cooling tower includes a fan module and a spray module, both of which can reduce the temperature of the coolant when in operation. Therefore, the cooling efficiency of the liquid cooling system can be flexibly adjusted by controlling the chiller, fan module, and spray module. This operating condition is adopted when the ambient temperature is suitable and only turning on the closed cooling tower can meet the cooling capacity required by the system. This operating condition completely utilizes natural cooling sources to achieve maximum energy saving; when the ambient temperature is too high and the closed cooling tower cannot meet the cooling demand, the chiller is turned on to supplement the cooling.

[0092] In some embodiments, the liquid cooling system may further include multiple temperature sensors that can detect temperature data at various locations within the liquid cooling system. The temperature data can reflect the cooling effect of the liquid cooling system and provide data support for automated regulation of the liquid cooling system.

[0093] Optionally, the liquid cooling system includes a first temperature sensor and / or a second temperature sensor.

[0094] The first temperature sensor is arranged at the inlet of the liquid cooling circulation loop and is used to detect the coolant temperature at the inlet of the liquid cooling circulation loop; the second temperature sensor is arranged at the outlet of the liquid cooling circulation loop and is used to detect the coolant temperature at the outlet of the liquid cooling circulation loop.

[0095] The inlet of the liquid cooling circulation loop is the initial position of the liquid cooling circulation loop passing through the liquid cooling heat exchanger, and the outlet of the liquid cooling circulation loop is the terminal position of the liquid cooling circulation loop passing through the liquid cooling heat exchanger.

[0096] Optionally, the liquid cooling system includes a third temperature sensor and / or a fourth temperature sensor.

[0097] The third temperature sensor is arranged at the liquid inlet and is used to detect the temperature of the coolant at the liquid inlet; the fourth temperature sensor is arranged at the liquid outlet and is used to detect the temperature of the coolant at the liquid outlet.

[0098] Optionally, the liquid cooling system includes a fifth temperature sensor.

[0099] The fifth temperature sensor is provided on the air-to-liquid heat exchanger and is used to detect the temperature of the air-to-liquid heat exchanger.

[0100] Optionally, the liquid cooling system includes a sixth temperature sensor.

[0101] The sixth temperature sensor is provided at the outlet of the second liquid pump and is used to detect the actual water supply temperature.

[0102] Optionally, the liquid cooling system includes: an outdoor temperature sensor.

[0103] Outdoor temperature sensor, used to monitor outdoor dry-bulb temperature and outdoor wet-bulb temperature.

[0104] In addition, an embodiment of the present application provides a liquid cooling cabinet, which includes a cabinet body and the above-mentioned liquid cooling system.

[0105] Optionally, the liquid-cooled heat exchanger is arranged on the inner bottom side of the cabinet body, and the air-liquid heat exchanger is arranged on the inner front side or inner rear side of the cabinet body; the first liquid-cooled branch, the second liquid-cooled branch and the third liquid-cooled branch are arranged inside the cabinet body.

[0106] The present application also provides a control method for a liquid cooling system, which can be applied to the above-mentioned liquid cooling system. Figure 4 , Figure 4 This is a control method for a liquid cooling system provided in an embodiment of the present application. In this embodiment, the control method for a liquid cooling system may include steps S110 to S130, each of which is specifically as follows:

[0107] S110: Acquire the first temperature and / or the second temperature.

[0108] The first temperature is the coolant temperature at the inlet of the liquid cooling circulation loop, and the second temperature is the coolant temperature at the outlet of the cooling circulation loop. The liquid cooling circulation loop passes through a liquid cooling heat exchanger and at least one cold plate.

[0109] S120: When the first temperature is less than or equal to a first preset temperature, or the second temperature is less than or equal to a second preset temperature, controlling the liquid cooling system to be in a series mode.

[0110] When the liquid cooling system is in series mode, the coolant in the liquid cooling system passes through the first liquid cooling branch and sequentially passes through the air-to-liquid heat exchanger and the liquid-cooling heat exchanger.

[0111] S130: When the first temperature is greater than a first preset temperature, or when the second temperature is greater than a second preset temperature, controlling the liquid cooling system to be in a parallel mode.

[0112] Among them, when the liquid cooling system is in parallel mode, the coolant in the liquid cooling system passes through the air-liquid heat exchanger through the second liquid cooling branch, and the coolant in the liquid cooling system passes through the liquid cooling heat exchanger through the third liquid cooling branch.

[0113] In summary, the liquid cooling system control method provided in this embodiment controls the connection mode of the liquid cooling pipeline of the liquid cooling system by judging the temperature of the liquid inlet and / or liquid outlet. In the series mode, the utilization efficiency of the cooling capacity can be improved, and in the parallel mode, the heat exchange effect of the liquid cooling heat exchanger can be guaranteed. Through the automatic and flexible selection of the connection mode, the utilization efficiency of the cooling capacity can be improved and the heat dissipation effect can be guaranteed.

[0114] In one embodiment, controlling the liquid cooling system in series mode includes: controlling the first control valve to open, and the second control valve and the third control valve to close; controlling the liquid cooling system in parallel mode includes: controlling the first control valve to close, and the second control valve and the third control valve to open; wherein, the first control valve is set in the first liquid cooling branch, the second control valve is set in the second liquid cooling branch, and the third control valve is set in the third liquid cooling branch.

[0115] In this embodiment, the connection mode of the liquid cooling pipeline can be controlled by controlling the opening and closing of the three control valves.

[0116] In one embodiment, when the first temperature is less than or equal to a first preset temperature, or the second temperature is less than or equal to a second preset temperature, controlling the liquid cooling system to be in series mode includes:

[0117] When the duration of the first temperature being less than or equal to the first preset temperature exceeds the first buffer time, or the duration of the second temperature being less than or equal to the second preset temperature exceeds the first buffer time, the liquid cooling system is controlled to be in series mode.

[0118] When the first temperature is greater than the first preset temperature, or the second temperature is greater than the second preset temperature, the liquid cooling system is controlled to be in parallel mode, including: when the duration of the first temperature being greater than the first preset temperature exceeds the second buffer time, or the duration of the second temperature being greater than the second preset temperature exceeds the second buffer time, the liquid cooling system is controlled to be in parallel mode.

[0119] In this embodiment, when the temperature changes and the connection mode needs to be switched, the first buffer time and the second buffer time must be met before the connection mode is switched. The first buffer time can be the same or different. By setting the first buffer time and the second buffer time, the problem of the liquid cooling system switching back and forth when the temperature condition reaches a critical point can be avoided.

[0120] In one embodiment, the control method of the liquid cooling system also includes: when the refrigeration module of the liquid cooling system does not meet the preset refrigeration requirements, controlling the liquid cooling system to be in emergency mode; when the liquid cooling system is in emergency mode, the first control valve and the second control valve are closed, and the third control valve is opened, and the coolant in the liquid cooling system passes through the liquid cooling heat exchanger through the third liquid cooling branch.

[0121] It should be noted that the emergency mode is used to ensure cooling in emergency situations. It is turned on when the cooling module of the liquid cooling system does not meet the preset cooling requirements, and can give priority to ensuring the heat dissipation of the liquid cooling heat exchanger.

[0122] In one embodiment, the control method of the liquid cooling system further includes: controlling the opening of a flow regulating valve of the liquid inlet to adjust the flow of the incoming coolant.

[0123] In one embodiment, after obtaining the first temperature and / or the second temperature, it also includes: obtaining a detection temperature; controlling the coolant flow rate at the liquid inlet according to at least one of the detection temperature, the first temperature and the second temperature; wherein the detection temperature is at least one of the third temperature, the fourth temperature and the fifth temperature, the third temperature is the coolant temperature at the liquid inlet, the fourth temperature is the coolant temperature at the liquid outlet, and the fifth temperature is the temperature of the air-to-liquid heat exchanger.

[0124] In this embodiment, the opening of the flow regulating valve at the liquid inlet can be controlled according to the coolant temperature at the inlet of the liquid cooling circulation loop, the coolant temperature at the outlet of the liquid cooling circulation loop, the coolant temperature at the liquid inlet, the coolant temperature at the liquid outlet and / or the temperature of the air-to-liquid heat exchanger.

[0125] It should be noted that the liquid inlets and outlets referred to in the third and fourth temperatures are not the inlets and outlets of the liquid cooling circuit. Instead, they are the shared inlets and outlets of the first, second, and third liquid cooling branches. The liquid cooling circuit is used to transfer heat from the device to be dissipated to the liquid-cooled heat exchanger, while the first, second, and third liquid cooling branches are used to transfer heat from the liquid-cooled heat exchanger and the air-to-liquid heat exchanger to the outside world.

[0126] It is understandable that when the detected temperature, the first temperature and / or the second temperature exceeds a preset value, the opening of the flow regulating valve of the liquid inlet needs to be increased accordingly.

[0127] In one embodiment, the coolant flow rate at the liquid inlet is controlled based on at least one of the detected temperature, the first temperature, and the second temperature, including: when the first temperature is less than or equal to the third preset temperature, or the second temperature is less than or equal to the fourth preset temperature, reducing the opening of the flow regulating valve at the liquid inlet so that the incoming coolant flow rate becomes smaller; when the first temperature is greater than the third preset temperature, or the second temperature is greater than the fourth preset temperature, increasing the opening of the flow regulating valve at the liquid inlet so that the incoming coolant flow rate becomes larger.

[0128] In one embodiment, the control method of the liquid cooling system also includes: obtaining the sixth temperature of the coolant in the water outlet of the liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; when the sixth temperature is less than or equal to the fifth preset temperature, controlling the first refrigeration module to work and the second refrigeration module not to work; when the sixth temperature is greater than the fifth preset temperature, controlling the first refrigeration module and the second refrigeration module to work.

[0129] In this embodiment, the liquid cooling system may include multiple refrigeration modules. In order to save energy, when the temperature of the coolant in the liquid pump outlet is appropriate, only one refrigeration module is used to cool the coolant. When the temperature of the coolant in the liquid pump outlet is high, two refrigeration modules are required to cool the coolant.

[0130] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; the control method of the liquid cooling system also includes: obtaining the sixth temperature of the coolant in the water outlet of the liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; when the sixth temperature is less than or equal to the fifth preset temperature, the fan module of the closed cooling tower is controlled to work, and the spray module and the chiller of the closed cooling tower are not operated; when the duration of the sixth temperature being greater than the fifth preset temperature does not exceed the third buffer time, the fan module and the spray module of the closed cooling tower are controlled to work, and the chiller is not operated; when the duration of the sixth temperature being greater than the fifth preset temperature exceeds the third buffer time, the fan module, the spray module and the chiller of the closed cooling tower are controlled to work.

[0131] In this embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; the closed cooling tower includes a fan module and a spray module, so the working conditions of the fan module, the spray module, and the chiller can be determined according to the coolant temperature in the liquid pump outlet, taking into account both the cooling effect and energy saving.

[0132] In one embodiment, the control method of the liquid cooling system also includes: obtaining the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature of the coolant in the liquid pump outlet, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch and the third liquid cooling branch; and controlling the working conditions of the first refrigeration module and the second refrigeration module according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature.

[0133] This embodiment also detects the outdoor dry-bulb temperature and wet-bulb temperature, and controls the operation of the refrigeration module based on the outdoor dry-bulb and wet-bulb temperatures and the temperature of the coolant at the pump outlet. As the coolant flows through the cooling pipes, it is affected by the ambient temperature. If the ambient temperature is relatively low, the coolant can still achieve a cooling effect while flowing through the cooling pipes.

[0134] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; and the operation of the first refrigeration module and the second refrigeration module is controlled according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the sixth temperature, including:

[0135] When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to the fifth preset temperature, and the sixth temperature is less than or equal to the fifth preset temperature, the fan module of the closed cooling tower is controlled to work, and the spray module and the chiller of the closed cooling tower are not operated.

[0136] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; and the operation of the first refrigeration module and the second refrigeration module is controlled according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the sixth temperature, including:

[0137] When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to the fifth preset temperature, the sixth temperature is greater than the fifth preset temperature, and the outdoor dry-bulb temperature is greater than zero degrees, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller does not operate.

[0138] In one embodiment, when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to a fifth preset temperature, the sixth temperature is greater than the fifth preset temperature, and the outdoor dry-bulb temperature is greater than zero degrees, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller is stopped, further comprising:

[0139] When the sixth temperature is greater than the fifth preset temperature for a duration exceeding the third buffer time, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

[0140] Chiller startup requires time and energy. Therefore, when temperature changes require the chiller to be started, a third buffer time must be met before the switchover occurs. This third buffer time prevents the chiller from repeatedly starting at critical temperature points.

[0141] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature, the working conditions of the first refrigeration module and the second refrigeration module are controlled, including: when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is less than or equal to the preset temperature, and the sixth temperature is less than or equal to the fifth preset temperature, the fan module and the spray module of the closed cooling tower are controlled to work, and the chiller is not operated.

[0142] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature, the working conditions of the first refrigeration module and the second refrigeration module are controlled, including: when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is less than or equal to the preset temperature, and the sixth temperature is greater than the fifth preset temperature, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

[0143] In one embodiment, the first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature, the working conditions of the first refrigeration module and the second refrigeration module are controlled, including: when the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, and the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is greater than the preset temperature, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

[0144] The above embodiments can be combined by those skilled in the art according to actual needs unless they conflict with each other. The liquid cooling system and liquid cooling cabinet of the present invention can be applied to heat dissipation in multiple scenarios. The following example uses a cold room where servers are placed as an example.

[0145] Cold plate liquid cooling is a heat dissipation method that attaches a cold plate to the main heat-generating components of the server, and removes the heat from the heat-generating components through the liquid flowing in the cold plate. The cold plate is arranged on a series of servers in the cabinet, and an interface is left on the outside of the server to connect to the external circulation pipe. The external circulation pipe is usually fixed to the cabinet in the form of a manifold metal frame and connected to the cooling distribution unit (Cooling Distribution Unit, CDU) to form a complete passage. The heat of the server is transferred to the heat exchange unit (i.e. the above-mentioned liquid cooling circulation loop) through the cold plate along the heat exchange pipe (i.e. the above-mentioned liquid cooling circulation loop), and the heat is further indirectly transferred to the outdoor side through the heat exchange unit.

[0146] The heat exchange unit is divided into centralized CDU and distributed CDU. The centralized CDU is installed outside the liquid cooling cabinet, and one CDU is responsible for the heat dissipation of multiple cabinets; the distributed CDU is integrated with the cabinet, and each cabinet has a built-in CDU, and each CDU is responsible for the heat dissipation of the corresponding cabinet.

[0147] For low-heat-generating components in the server, such as hard disks and memory, there is no cold plate installed, so cold plate liquid cooling cannot be used. Conventional air-cooling air-conditioning systems must still be used to remove heat from the server through the server fan.

[0148] The liquid cooling system of this embodiment is divided into primary-side pipelines and secondary-side pipelines. The primary-side pipelines and the secondary-side pipelines exchange heat through the distributed CDU arranged inside the cabinet. That is, the primary-side pipelines are distributed inside and outside the cabinet, and the secondary-side pipelines are all located inside the cabinet.

[0149] The pipes on one side inside the cabinet can be regarded as the three liquid cooling branches mentioned above, the pipes on the primary side outside the cabinet can be regarded as the two cooling branches mentioned above, and the pipes on the secondary side can be regarded as the liquid cooling circulation loop mentioned above.

[0150] See also Figure 5 、 Figure 6 and Figure 7 , see Figure 5 , Figure 5 This is a schematic diagram of the structure of the pipeline on one side of the cabinet provided in an embodiment of the present application. Figure 6 This is a schematic diagram of the structure of the secondary side pipeline provided in the embodiment of the present application. Figure 7 This is a schematic diagram of the structure of the primary side pipeline outside the cabinet provided in an embodiment of the present application.

[0151] Figure 7 It includes a machine room 0, a chiller 1, a heat exchange device 2, a closed cooling tower 3, a liquid pump 4, multiple cabinets such as liquid cooling cabinets 5 and 6, electric valves 7 and 8, multiple flow regulating valves 100, and connecting pipes between various components.

[0152] There are two operating conditions for the primary side pipeline outside the cabinet. Condition (1): The closed cooling tower 3 is turned on, the chiller 1 is turned off, the electric valve 7 is turned on, and the electric valve 8 is turned off. The primary side fluid dissipates heat only through the closed cooling tower 3 and the outdoor environment. This operating condition is used when the ambient temperature is suitable and only turning on the closed cooling tower can meet the cooling capacity required by the system. This operating condition completely uses natural cooling sources to achieve maximum energy saving.

[0153] Working condition (2): The closed cooling tower 3 and the chiller 1 are opened at the same time, the electric valve 7 is closed, and the electric valve 8 is opened. The primary side fluid is first pre-cooled by the closed cooling tower 3, and then heat is exchanged with the chiller 1 through the heat exchange device 2. When the ambient temperature is too high and the closed cooling tower cannot meet the cooling demand, the chiller is turned on to supplement the cooling.

[0154] Preset the primary side water supply temperature T1, dry bulb heat exchange temperature difference A, and wet bulb heat exchange temperature difference B, monitor the outdoor environment dry bulb temperature Ts and outdoor wet bulb temperature Tw, and set a temperature sensor at the outlet of liquid pump 4 to monitor the actual water supply temperature T2. The operating conditions and operating modes are as follows:

[0155] When Ts+A<T1, and T2<T1, the operating condition (1) is adopted, and the closed cooling tower 3 only turns on the fan and turns off the spraying function; if it is monitored that T2>T1, and Ts>0℃, the spraying function is further turned on to make T2<T1. If T2<T1 cannot be made after the spraying function is turned on for a period of time, the operating condition (2) is adopted, and the fan and spraying functions of the closed cooling tower 3 are kept turned on.

[0156] When Ts+A>T1, Tw+B<T1, and T2<T1, the operating condition (1) is adopted, and at this time, the closed cooling tower 3 not only turns on the fan, but also turns on the spray function; if it is monitored that T2>T1, the operating condition (2) is adopted, and the fan and spray functions of the closed cooling tower 3 are kept turned on.

[0157] When Ts+A>T1, Tw+B>T1, the operating condition (2) is adopted, and the fan and spray functions of the closed cooling tower 3 are kept turned on.

[0158] When the operating conditions change and the operating mode needs to be switched, a certain buffer time t1 must be met before the operating mode is switched.

[0159] Figure 5 It includes a distributed CDU 12, a heat exchange device 13, an electric valve 14, an electric valve 15, an electric valve 16, and connecting pipes between the various components. The primary side pipe inside the cabinet is connected to the primary side pipe outside the cabinet.

[0160] The distributed CDU 12 and the heat exchange device 13 are integrated into the cabinet 5 (6), the distributed CDU 12 is located below the cabinet, and the heat exchange device 13 is located at the front or rear side of the cabinet.

[0161] There are three connection modes for the primary side pipes inside the cabinet. Connection mode (1): Distributed CDU 12 is connected in series with heat exchanger 13, electric valve 15 is open, and electric valves 14 and 16 are closed. After the primary side fluid enters the cabinet, it first flows into heat exchanger 13, absorbs the heat of the air cooling part, and after a certain temperature rise, it flows into distributed CDU 12, exchanges heat with the secondary side fluid, absorbs the heat of the secondary side fluid (i.e., liquid cooling part), and after further temperature rise, flows out of the cabinet and dissipates heat in the external system. By reasonably setting the temperature gradient, the series connection can fully utilize the cooling capacity of the primary side fluid.

[0162] Connection mode (2): Distributed CDU 12 and heat exchanger 13 are connected in parallel. Electric valves 14 and 16 are open, and electric valve 15 is closed. After the primary side fluid enters the cabinet, it is divided into two paths and flows into the distributed CDU 12 and heat exchanger 13 simultaneously. They absorb the heat from the air cooling and liquid cooling respectively. The two fluid paths have different degrees of temperature rise and are then combined into a single pipeline to flow out of the cabinet. The parallel connection provides the distributed CDU 12 with a lower temperature primary side fluid and secondary side fluid for heat exchange, ensuring the heat exchange effect on the liquid cooling side.

[0163] Connection mode (3): Bypass the heat exchange device 13, the primary side fluid only flows into the distributed CDU 12 for liquid cooling heat exchange, at this time the electric valve 16 is open, and the electric valves 14 and 15 are closed.

[0164] During normal operation, the primary-side piping within the cabinet can be connected in series or parallel, depending on the needs. This can also be switched between series and parallel based on secondary-side heat exchange requirements. Temperature sensors are installed at the secondary-side fluid inlet and outlet of the distributed CDU 12 to monitor the secondary-side fluid inlet temperature T3 and return temperature T4. Preset inlet temperature T5, return temperature T6, and temperature differential C are also set.

[0165] When T3>T5+C or T4>T6+C, and a certain buffer time t2 is reached, it indicates that the liquid cooling part has a high heat dissipation demand. At this time, it switches to parallel connection mode to provide a lower heat exchange temperature for the secondary side fluid. When T3<T5+C or T4<T6+C, and a certain buffer time t2 is reached, it indicates that the heat dissipation of the liquid cooling part is within the normal range. It switches to series mode to fully utilize the cooling capacity of the primary side fluid.

[0166] Connection mode (3) is used for cooling protection in emergency situations. When Ts+A>T1, Tw+B>T1, and the cooling module 1 needs to be turned on, but the cooling module 1 cannot be started for some reason, the primary side pipeline inside the cabinet is switched to connection mode (3), bypassing the heat exchange device 13, giving priority to heat dissipation of the secondary side liquid cooling part.

[0167] The secondary side pipeline is located inside the cabinet, between the CDU and the server and inside the server. Figure 6 The system includes a distributed CDU 12, a liquid pump 9, multiple servers 10, multiple cold plates 11 within the servers, and the piping between these components. The servers 10 and their piping are connected in parallel, and the secondary working fluid flows out of the CDU and enters the servers 10 in parallel. After exiting the CDU 12, the secondary fluid flows along the pipelines into the cold plates 11 of each server, absorbing heat from major heat-generating components such as the CPU and GPU. The secondary fluid then flows out of the server and returns to the CDU 12 to exchange heat with the primary piping. Heat from components such as memory and hard drives is carried by the server fans to the heat exchanger 13 via airflow, where it exchanges heat with the primary fluid.

[0168] A flow regulating valve 100 is provided at the entrance of the primary side fluid into each cabinet, and temperature sensors are provided at the inlet and outlet of the secondary side fluid of the distributed CDU12 to monitor the secondary side fluid inlet temperature T3, return liquid temperature T4, preset inlet liquid temperature T5, preset return liquid temperature T6, and preset temperature difference C.

[0169] For cabinets with T3>T5+C or T4>T6+C, increase the opening of the cabinet flow control valve 100; for cabinets with T3<T5-C or T4<T6-C, reduce the opening of the cabinet flow control valve 100; reasonably distribute the primary side fluid flow entering each cabinet to ensure the heat dissipation effect of each cabinet.

[0170] This embodiment only contains one set of pipes between the liquid-cooled cabinet and the external system, but it can solve the heat dissipation of both liquid cooling and air cooling in cold plate liquid cooling. By properly setting the operating temperature, it can fully utilize the outdoor natural cooling source, and even use the outdoor natural cooling source for heat exchange all year round. While greatly simplifying the system piping layout in the computer room, it achieves extremely high energy saving.

[0171] This embodiment innovates the piping connection method for cold plate liquid cooling cabinets combined with distributed CDUs. Through piping optimization, control valves, temperature sensors, and other settings, it not only significantly simplifies the piping of the cold plate liquid cooling system, but also allows the system temperature gradient to be reasonably set according to the external environmental conditions and system operating conditions, flexibly adjusting the working medium circulation inside and outside the cabinet to maximize energy savings. The system also provides multiple operating conditions and can flexibly adjust the system form according to actual operating requirements to ensure efficient energy utilization. The system also takes into account the operating condition adjustment of the rack external refrigeration module and the closed cooling tower, thereby forming a complete system composition and fully automatic control of the distributed CDU system.

[0172] Figure 8 is a schematic diagram of the physical structure of the electronic device provided in the embodiment of the present application, such as Figure 8 As shown, the electronic device may include: In this embodiment, the electronic device may include a memory 820, a processor 810, and a computer program stored in the memory 820 and executable on the processor 810. When the processor 810 executes the program, the control method of the liquid cooling system provided by the above methods is implemented.

[0173] Optionally, the electronic device may further include a communication bus 830 and a communication interface (CommunicationsInterface) 840, wherein the processor 810, the communication interface 840, and the memory 820 communicate with each other via the communication bus 830. The processor 810 may call the logic instructions in the memory 820 to execute the control method of the liquid cooling system provided by the above methods. The steps and principles of the control method have been described in detail in the above methods and will not be repeated here.

[0174] In addition, the logic instructions in the above-mentioned memory 820 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0175] On the other hand, the present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the control method of the liquid cooling system provided by the above methods. Its steps and principles have been introduced in detail in the above methods and will not be repeated here.

[0176] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling system, characterized in that: include: comprising a first liquid cooling branch, a second liquid cooling branch and a third liquid cooling branch; The first liquid cooling branch has a liquid inlet and a liquid outlet, and an air-to-liquid heat exchanger, a first control valve, and a liquid cooling heat exchanger are sequentially connected in series on the first liquid cooling branch; the first control valve is used to control the on / off of the first liquid cooling branch; One end of the second liquid cooling branch is connected between the first control valve and the air-to-liquid heat exchanger, and the other end of the second liquid cooling branch is connected to the liquid outlet of the liquid cooling heat exchanger. The second liquid cooling branch has a second control valve, which is used to control the on and off of the second liquid cooling branch. One end of the third liquid cooling branch is connected to the liquid inlet end of the air-to-liquid heat exchanger, and the other end of the third liquid cooling branch is connected between the first control valve and the liquid cooling heat exchanger. The third liquid cooling branch has a third control valve, and the third control valve is used to control the on and off of the third liquid cooling branch; In the series mode, the first control valve is opened, and the second and third control valves are closed; the liquid-cooled heat exchanger and the air-liquid heat exchanger are connected in series for heat dissipation; In the parallel mode, the second control valve and the third control valve are opened, and the first control valve is closed; the liquid-cooled heat exchanger and the air-to-liquid heat exchanger are connected in parallel to dissipate heat; In the emergency mode, the third control valve is opened, and the first control valve and the second control valve are closed; the emergency mode is opened when the refrigeration module of the liquid cooling system does not meet the preset refrigeration requirements, so as to give priority to heat dissipation of the liquid cooling heat exchanger; The liquid-cooled heat exchanger is used to store heat absorbed from the device to be cooled by liquid cooling technology, and the air-liquid heat exchanger is used to store heat absorbed from the device to be cooled by air cooling technology.

2. The liquid cooling system according to claim 1, characterized in that It also includes a liquid cooling circulation loop, in which the coolant in the liquid cooling circulation loop exchanges heat in the liquid cooling heat exchanger, and the liquid cooling circulation loop has a first liquid pump and at least one cold plate.

3. The liquid cooling system according to claim 2, characterized in that: Also includes: a first temperature sensor, disposed at an inlet of a liquid cooling circulation loop, for detecting a temperature of the coolant at the inlet of the liquid cooling circulation loop; and / or, A second temperature sensor is provided at the outlet of the liquid cooling circulation loop, and is used to detect the temperature of the coolant at the outlet of the liquid cooling circulation loop; The inlet of the liquid cooling circulation loop is the initial position of the liquid cooling circulation loop passing through the liquid cooling heat exchanger, and the outlet of the liquid cooling circulation loop is the terminal position of the liquid cooling circulation loop passing through the liquid cooling heat exchanger.

4. The liquid cooling system according to claim 1, wherein: Also includes: a third temperature sensor, disposed at the liquid inlet, for detecting the coolant temperature at the liquid inlet; and / or, A fourth temperature sensor is provided at the liquid outlet and is used to detect the temperature of the coolant at the liquid outlet.

5. The liquid cooling system according to claim 1, characterized in that: Also includes: A fifth temperature sensor is provided on the air-to-liquid heat exchanger and is used to detect the temperature of the air-to-liquid heat exchanger.

6. The liquid cooling system according to claim 1, characterized in that: Also includes: A flow regulating valve is provided at the liquid inlet and is used to control the flow of the coolant at the liquid inlet.

7. The liquid cooling system according to claim 1, characterized in that: Also includes: A first cooling branch, one end of the first cooling branch is connected to the liquid inlet, and the other end is connected to the liquid outlet, and a first refrigeration module and a second liquid pump are connected in series on the first cooling branch.

8. The liquid cooling system according to claim 7, characterized in that: A fourth control valve is connected in series on the first cooling branch, and the fourth control valve is connected in series between the first refrigeration module and the second liquid pump; The liquid cooling system also includes a second cooling branch, one end of the second cooling branch is connected between the liquid outlet of the first refrigeration module and the fourth control valve, the other end of the second cooling branch is connected between the liquid inlet of the second liquid pump and the fourth control valve, and the second refrigeration module and the fifth control valve are connected in series on the second cooling branch.

9. The liquid cooling system according to claim 8, characterized in that: The first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller.

10. The liquid cooling system according to any one of claims 7 to 9, characterized in that: Also includes: The sixth temperature sensor is provided at the outlet of the second liquid pump and is used to detect the actual water supply temperature.

11. The liquid cooling system according to claim 7, characterized in that: Also includes: Outdoor temperature sensor, used to monitor outdoor dry-bulb temperature and outdoor wet-bulb temperature.

12. A liquid cooling cabinet, characterized in that: The invention comprises a cabinet body and a liquid cooling system as claimed in any one of claims 1 to 6.

13. The liquid cooling cabinet according to claim 12, characterized in that: The liquid-cooling heat exchanger is arranged on the inner bottom side of the cabinet body, and the air-liquid heat exchanger is arranged on the inner front side or inner rear side of the cabinet body; the first liquid-cooling branch, the second liquid-cooling branch and the third liquid-cooling branch are arranged inside the cabinet body.

14. A method for controlling a liquid cooling system, characterized in that: include: Obtaining a first temperature and / or a second temperature; the first temperature is the coolant temperature at the inlet of a liquid cooling circulation loop, and the second temperature is the coolant temperature at the outlet of the liquid cooling circulation loop; wherein the liquid cooling circulation loop passes through a liquid cooling heat exchanger and at least one cold plate; When the first temperature is less than or equal to a first preset temperature, or the second temperature is less than or equal to a second preset temperature, controlling the liquid cooling system to be in a series mode; When the first temperature is greater than a first preset temperature, or the second temperature is greater than a second preset temperature, controlling the liquid cooling system to be in a parallel mode; Wherein, when the liquid cooling system is in series mode, the coolant in the liquid cooling system passes through the air-liquid heat exchanger and the liquid-cooled heat exchanger in sequence through the first liquid cooling branch; when the liquid cooling system is in parallel mode, the coolant in the liquid cooling system passes through the air-liquid heat exchanger through the second liquid cooling branch, and the coolant in the liquid cooling system passes through the liquid-cooled heat exchanger through the third liquid cooling branch; The control liquid cooling system is in series mode, including: Control the first control valve to open, and the second control valve and the third control valve to close; The controlling the liquid cooling system to be in a parallel mode includes: Controlling the first control valve to close, and the second control valve and the third control valve to open; Wherein, the first control valve is provided in the first liquid cooling branch, the second control valve is provided in the second liquid cooling branch, and the third control valve is provided in the third liquid cooling branch; When a refrigeration module of the liquid cooling system does not meet a preset refrigeration requirement, controlling the liquid cooling system to be in an emergency mode; When the liquid cooling system is in emergency mode, the first control valve and the second control valve are closed, the third control valve is opened, and the coolant in the liquid cooling system passes through the liquid cooling heat exchanger via the third liquid cooling branch; The liquid-cooled heat exchanger is used to store heat absorbed from the device to be cooled by liquid cooling technology, and the air-liquid heat exchanger is used to store heat absorbed from the device to be cooled by air cooling technology.

15. The control method of the liquid cooling system according to claim 14, characterized in that: When the first temperature is less than or equal to a first preset temperature, or the second temperature is less than or equal to a second preset temperature, controlling the liquid cooling system to be in series mode includes: When the first temperature is less than or equal to the first preset temperature for a duration exceeding a first buffer time, or the second temperature is less than or equal to the second preset temperature for a duration exceeding the first buffer time, controlling the liquid cooling system to be in series mode; When the first temperature is greater than a first preset temperature, or the second temperature is greater than a second preset temperature, controlling the liquid cooling system to be in a parallel mode includes: When the first temperature is greater than the first preset temperature for a duration exceeding a second buffer time, or the second temperature is greater than the second preset temperature for a duration exceeding the second buffer time, the liquid cooling system is controlled to be in parallel mode.

16. The control method of the liquid cooling system according to claim 14, characterized in that: Also includes: Control the opening of the flow regulating valve at the liquid inlet to adjust the flow of incoming coolant.

17. The control method of the liquid cooling system according to claim 14, characterized in that: The first liquid cooling branch has a liquid inlet and a liquid outlet. After obtaining the first temperature and / or the second temperature, the method further includes: Get the detected temperature; controlling the coolant flow rate of the liquid inlet according to at least one of the detected temperature, the first temperature, and the second temperature; The detected temperature is at least one of a third temperature, a fourth temperature and a fifth temperature, the third temperature is the coolant temperature of the liquid inlet, the fourth temperature is the coolant temperature of the liquid outlet, and the fifth temperature is the temperature of the air-to-liquid heat exchanger.

18. The control method of the liquid cooling system according to claim 17, characterized in that: The controlling the coolant flow rate of the liquid inlet according to at least one of the detected temperature, the first temperature, and the second temperature includes: When the first temperature is less than or equal to a third preset temperature, or the second temperature is less than or equal to a fourth preset temperature, reducing the opening of the flow regulating valve of the liquid inlet so that the flow rate of the incoming coolant becomes smaller; When the first temperature is greater than a third preset temperature, or the second temperature is greater than a fourth preset temperature, the opening of the flow regulating valve of the liquid inlet is increased to increase the flow of the incoming coolant.

19. The control method of the liquid cooling system according to claim 14, characterized in that: Also includes: acquiring a sixth temperature of the coolant in a water outlet of a liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch, and the third liquid cooling branch; When the sixth temperature is less than or equal to the fifth preset temperature, the first refrigeration module is controlled to operate and the second refrigeration module is not controlled to operate; When the sixth temperature is greater than the fifth preset temperature, the first refrigeration module and the second refrigeration module are controlled to operate.

20. The control method of the liquid cooling system according to claim 19, characterized in that: The first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; further comprising: acquiring a sixth temperature of the coolant in a water outlet of a liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch, and the third liquid cooling branch; When the sixth temperature is less than or equal to the fifth preset temperature, the fan module of the closed cooling tower is controlled to operate, and the spray module of the closed cooling tower and the chiller are controlled to not operate; When the duration that the sixth temperature is greater than the fifth preset temperature does not exceed the third buffer time, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller is not operated; When the duration that the sixth temperature is greater than the fifth preset temperature exceeds a third buffer time, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

21. The control method of the liquid cooling system according to claim 14, characterized in that: Also includes: obtaining an outdoor dry-bulb temperature, an outdoor wet-bulb temperature, and a sixth temperature of the coolant at a water outlet of a liquid pump, wherein the liquid pump provides power for the first liquid cooling branch, the second liquid cooling branch, and the third liquid cooling branch; The operation of the first refrigeration module and the second refrigeration module is controlled according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature and the sixth temperature.

22. The control method of the liquid cooling system according to claim 21, characterized in that: The first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; and controlling the working conditions of the first refrigeration module and the second refrigeration module according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the sixth temperature includes: When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to a fifth preset temperature, and the sixth temperature is less than or equal to the fifth preset temperature, the fan module of the closed cooling tower is controlled to operate, and the spray module of the closed cooling tower and the chiller are not operated; When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to a fifth preset temperature, the sixth temperature is greater than the fifth preset temperature, and the outdoor dry-bulb temperature is greater than zero degrees, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller is not operated; When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is less than or equal to the fifth preset temperature, the sixth temperature is greater than the fifth preset temperature, and the outdoor dry-bulb temperature is greater than zero degrees, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller stops operating, further comprising: When the duration that the sixth temperature is greater than the fifth preset temperature exceeds a third buffer time, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

23. The control method of the liquid cooling system according to claim 21, characterized in that: The first refrigeration module is a closed cooling tower, and the second refrigeration module is a chiller; and controlling the working conditions of the first refrigeration module and the second refrigeration module according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the sixth temperature includes: When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than a fifth preset temperature, the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is less than or equal to the preset temperature, and the sixth temperature is less than or equal to the fifth preset temperature, the fan module and the spray module of the closed cooling tower are controlled to operate, and the chiller is not operated; When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than a fifth preset temperature, the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is less than or equal to the preset temperature, and the sixth temperature is greater than the fifth preset temperature, the fan module, the spray module, and the chiller of the closed cooling tower are controlled to operate; When the sum of the outdoor dry-bulb temperature and the dry-bulb heat exchange temperature difference is greater than the fifth preset temperature, and the sum of the outdoor wet-bulb temperature and the wet-bulb heat exchange temperature difference is greater than the preset temperature, the fan module, the spray module and the chiller of the closed cooling tower are controlled to operate.

24. An electronic device comprising a processor and a memory storing a computer program, characterized in that: When the processor executes the computer program, the steps of the method for controlling the liquid cooling system according to any one of claims 14 to 23 are implemented.

25. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for controlling a liquid cooling system according to any one of claims 14 to 23 are implemented.

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