Liquid cooling system control method and liquid cooling system

Abstract

The present application is suitable for the technical field of liquid cooling system, and provides a liquid cooling system control method and a liquid cooling system. The liquid cooling system control method comprises the following steps: in the case that the ambient temperature where the liquid cooling system is located is lower than a preset temperature threshold, when an opening instruction of a main circulating pump of the liquid cooling system is received, the inlet pressure of the main circulating pump is acquired; if the inlet pressure of the main circulating pump is less than or equal to a preset low-pressure alarm value, the liquid supplement device and / or the electric valve of system bypass of the liquid cooling system are controlled based on the preset low-pressure alarm value, a preset pump stop pressure value and the inlet pressure, so that the inlet pressure is greater than the preset low-pressure alarm value; the preset pump stop pressure value is less than the preset low-pressure alarm value. The present application can improve the inlet pressure of the main circulating pump in the case that the ambient temperature is extremely low and the main circulating pump cannot be normally started, so that the liquid cooling system can be normally operated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of liquid cooling systems, and particularly relates to a liquid cooling system control method and a liquid cooling system. BACKGROUND

[0002] Liquid cooling technology is widely used in high-power data centers due to its low PUE (Power Usage Effectiveness), low noise, and ability to meet the heat dissipation requirements of high-power density cabinets. The main circulating pump, as the core device of the liquid cooling system, provides power for the cooling liquid, enabling the cooling liquid to circulate in the liquid cooling system and carry away the heat generated by the servers in the data center. The operation of the main circulating pump directly affects the heat exchange effect of the data center.

[0003] In related technologies, the control scheme for the operating state of the main circulating pump mainly includes detection and alarm of the inlet and outlet pressures of the main circulating pump, detection and alarm of the inlet and outlet temperatures, and adjustment of the frequency of the main circulating pump. However, when the ambient temperature is extremely low, the thermal expansion and contraction of the cooling liquid will cause the inlet pressure of the main circulating pump to decrease. In this case, the start of the main circulating pump will usually cause a low-pressure alarm or even a pump stop, affecting the normal operation of the liquid cooling system. SUMMARY

[0004] Therefore, the embodiments of the present application provide a liquid cooling system control method and a liquid cooling system to solve the problem of the liquid cooling system failing to operate normally at extremely low temperatures.

[0005] The present application is achieved by the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a liquid cooling system control method, which includes: when an opening instruction of a main circulating pump of a liquid cooling system is received under the condition that the ambient temperature of the liquid cooling system is lower than a preset temperature threshold, obtaining the inlet pressure of the main circulating pump; if the inlet pressure of the main circulating pump is less than or equal to a preset low-pressure alarm value, controlling a liquid supplement device and / or an electric valve of system bypass of the liquid cooling system based on the preset low-pressure alarm value, a preset pump stop pressure value, and the inlet pressure, so that the inlet pressure is greater than the preset low-pressure alarm value; and the preset pump stop pressure value is less than the preset low-pressure alarm value.

[0007] In combination with the first aspect, in some embodiments, the control of the liquid supplement device of the liquid cooling system based on the preset low-pressure alarm value, the preset pump stop pressure value, and the inlet pressure includes: if the inlet pressure is less than or equal to the preset pump stop pressure value, controlling the liquid supplement device to supplement the liquid cooling system until the inlet pressure is greater than the preset low-pressure alarm value, and then controlling the liquid supplement device to stop supplementing.

[0008] Further, after controlling the liquid supplementing device to stop supplementing liquid, the method further comprises: controlling the main circulating pump to start; when it is monitored that the inlet pressure is greater than or equal to a preset high-pressure alarm value, controlling a liquid discharging device of the liquid cooling system to discharge liquid until the inlet pressure is between the preset low-pressure alarm value and the preset high-pressure alarm value; and the preset high-pressure alarm value is greater than the preset low-pressure alarm value.

[0009] Further, the control of the main circulating pump to start comprises: controlling the main circulating pump to start and run at a preset first frequency; and the preset first frequency is lower than a normal working frequency of the main circulating pump; after the control of the main circulating pump to start and run at the preset first frequency, the method further comprises: when it is monitored that the inlet pressure is less than the preset high-pressure alarm value, controlling the main circulating pump to gradually increase the running frequency until the inlet pressure is greater than or equal to the preset high-pressure alarm value.

[0010] In combination with the first aspect, in some embodiments, the control of the electrically-operated valve of the system bypass of the liquid cooling system based on the preset low-pressure alarm value, a preset pump stop pressure value and the inlet pressure comprises: if the inlet pressure is greater than the preset pump stop pressure value and less than or equal to the preset low-pressure alarm value, controlling the electrically-operated valve of the system bypass to start.

[0011] Further, after the control of the electrically-operated valve of the system bypass to start, the method further comprises: controlling the main circulating pump to start; when it is monitored that the inlet pressure is greater than the preset low-pressure alarm value and less than a preset high-pressure alarm value, controlling the opening degree of the electrically-operated valve of the system bypass to gradually decrease until it is monitored that the inlet pressure is greater than or equal to the preset high-pressure alarm value, and then controlling the electrically-operated valve of the system bypass to stop; and the preset high-pressure alarm value is greater than the preset low-pressure alarm value.

[0012] Further, the control of the main circulating pump to start comprises: controlling the main circulating pump to start and run at a preset first frequency; and the preset first frequency is lower than a normal working frequency of the main circulating pump; after the control of the main circulating pump to start and run at the preset first frequency, the method further comprises: when it is monitored that the inlet pressure is greater than the preset low-pressure alarm value and less than the preset high-pressure alarm value, controlling the main circulating pump to gradually increase the running frequency until the inlet pressure is greater than or equal to the preset high-pressure alarm value.

[0013] In some embodiments of the first aspect, the liquid cooling system further comprises a liquid supplementing device and a system bypass, the liquid supplementing device is connected to the main circulating pump and the system bypass is connected to the main circulating pump and the heat exchanger; the liquid supplementing device comprises a liquid supplementing tank and a liquid supplementing pump, the liquid supplementing tank is connected to the input end of the main circulating pump, and the liquid supplementing pump is connected to the liquid supplementing tank; the system bypass comprises a bypass liquid tank and a bypass liquid pump, the bypass liquid tank is connected to the main circulating pump, and the bypass liquid pump is connected to the bypass liquid tank; the controller is configured to control the liquid supplementing pump and the bypass liquid pump based on the preset low-pressure alarm value, the preset pump stop pressure value and the inlet pressure, and the control comprises: if the inlet pressure is less than or equal to the preset pump stop pressure value, controlling the liquid supplementing pump to supplement liquid to the liquid cooling system until the inlet pressure is greater than the preset pump stop pressure value, and then controlling the liquid supplementing pump to stop supplementing liquid, and controlling the bypass liquid pump to start.

[0014] In some embodiments of the first aspect, the liquid supplementing port of the liquid cooling system is connected to the input end of the main circulating pump, and the liquid supplementing port is connected to a liquid supplementing tank in the liquid supplementing device; the liquid supplementing tank further comprises a heater, the distance between the highest water level of the liquid in the liquid supplementing tank and the top wall of the liquid supplementing tank is greater than a first value, and the heater is configured to heat the liquid or gas in the liquid supplementing tank; the control of the liquid supplementing device and the electrically-operated valve of the system bypass based on the preset low-pressure alarm value, the preset pump stop pressure value and the inlet pressure comprises: if the inlet pressure is less than or equal to the preset pump stop pressure value, controlling the heater to start and controlling the electrically-operated valve of the liquid supplementing port to start, so that the liquid in the liquid supplementing tank flows to the liquid supplementing port under the action of pressure; when it is detected that the inlet pressure is greater than the preset pump stop pressure value, controlling the electrically-operated valve of the system bypass to start; and when it is detected that the inlet pressure is greater than the preset low-pressure alarm value, controlling the heater to stop and controlling the electrically-operated valve of the liquid supplementing port to stop.

[0015] In the second aspect, the embodiments of the present application provide a liquid cooling system, comprising: a main circulating pump, a heat exchanger, a system bypass, a liquid supplementing device and a controller; the system bypass is provided with an electrically-operated valve, and the input end of the main circulating pump is provided with a pressure sensor; the controller is configured to execute the liquid cooling system control method according to any one of the first aspect; the main circulating pump, a liquid cooling load and the heat exchanger are connected in series to form a main circulating loop, the main circulating pump, the system bypass and the heat exchanger are connected in series to form a bypass circulating loop; and the liquid supplementing device is connected to the main circulating loop.

[0016] In the third aspect, the embodiments of the present application provide a controller, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the liquid cooling system control method according to any one of the first aspect.

[0017] In the fourth aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the liquid cooling system control method according to any one of the first aspect.

[0018] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a controller, causes the controller to perform the liquid cooling system control method according to any one of the first aspect.

[0019] Compared with the related art, the embodiment of the present application has the following beneficial effects:

[0020] The embodiment of the present application provides a liquid cooling system control method and a liquid cooling system. The method comprises the following steps: in the case that an ambient temperature of the liquid cooling system is lower than a preset temperature threshold, when a start instruction of a main circulating pump of the liquid cooling system is received, if an inlet pressure of the main circulating pump is less than or equal to a preset low-pressure alarm value, the liquid supplement device and / or an electric valve of system bypass of the liquid cooling system are controlled based on the preset low-pressure alarm value, a preset pump stop pressure value and the inlet pressure, so as to improve the inlet pressure of the main circulating pump. According to the relationship between the inlet pressure of the main circulating pump of the liquid cooling system and the preset low-pressure alarm value and the preset pump stop pressure value, the liquid cooling system can be controlled by using the liquid supplement, the bypass or the liquid supplement and the bypass in cooperation, so that the inlet pressure of the main circulating pump of the liquid cooling system in a low-temperature environment is improved, and the normal operation of the main circulating pump and the liquid cooling system is ensured.

[0021] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or related technical description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor.

[0023] Figure 1 is a structural schematic diagram of a liquid cooling system provided by an embodiment of the present application;

[0024] Figure 2 is a flow schematic diagram of a liquid cooling system control method provided by an embodiment of the present application;

[0025] Figure 3 is a program flowchart of a liquid cooling system control method provided by an embodiment of the present application;

[0026] Figure 4 is a program flowchart of a liquid cooling system control method provided by another embodiment of the present application;

[0027] Figure 5 is a program flowchart of a liquid cooling system control method provided by still another embodiment of the present application;

[0028] Figure 6 is a program flow chart of the liquid cooling system control method provided by another embodiment of the present application;

[0029] Figure 7 is a structural schematic diagram of the controller provided by an embodiment of the present application. DETAILED DESCRIPTION

[0030] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0031] It should be understood that the term "and / or" used in the description and claims of the present application refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below with reference to the accompanying drawings.

[0033] Figure 1 is a structural schematic diagram of the liquid cooling system provided by an embodiment of the present application. As shown in the figure, the system includes a main circulating pump 11, a heat exchanger 12, a system bypass 13 and a liquid supplement device 14. Figure 1 The input end (inlet) of the main circulating pump 11 is provided with a pressure sensor for detecting the inlet pressure of the main circulating pump 11. The heat exchanger 12 can be a plate heat exchanger. The system bypass 13 is provided with an electric valve for controlling the opening, closing and opening degree adjustment of the system bypass 13.

[0034] The input end (inlet) of the main circulating pump 11 is provided with a pressure sensor for detecting the inlet pressure of the main circulating pump 11. The heat exchanger 12 can be a plate heat exchanger. The system bypass 13 is provided with an electric valve for controlling the opening, closing and opening degree adjustment of the system bypass 13.

[0035] Referring to Figure 1 , the main circulating pump 11, the liquid cooling load 15 and the heat exchanger 12 are connected in series to form a main circulating loop 16. The liquid cooling load 15 is connected to the main circulating loop 16 through a liquid outlet 161 and a liquid inlet 162 provided on the main circulating loop 16. According to the water outlet direction of the main circulating pump 11, it can be seen that the cooling liquid pumped out by the main circulating pump 11 flows into the liquid cooling load 15 through the liquid outlet 161, and then flows out of the liquid cooling load 15 through the liquid inlet 162. The main circulating pump 11, the system bypass 13 and the heat exchanger 12 are connected in series to form a bypass circulating loop 17. The liquid supplement device 14 is connected to the main circulating loop 16.

[0036] Referring to Figure 1The liquid supplement device 14 is arranged between the liquid inlet 162 and the liquid inlet end of the heat exchanger 12. In other embodiments, the liquid supplement device 14 can also be arranged between the liquid outlet end of the heat exchanger 12 and the input end of the main circulating pump 11. The liquid supplement device 14 is connected to the liquid cooling system through a liquid supplement port 163 arranged on the main circulating loop 16.

[0037] Figure 2 A flowchart of a liquid cooling system control method provided by an embodiment of the present application is shown in FIG. 1. Referring to FIG. 1, Figure 2 The liquid cooling system control method is described in detail as follows.

[0038] S201: When the ambient temperature of the liquid cooling system is lower than a preset temperature threshold, and an opening instruction of the main circulating pump of the liquid cooling system is received, the inlet pressure of the main circulating pump is acquired.

[0039] The execution subject of the embodiment is the controller of the liquid cooling system. The preset temperature threshold is a threshold for determining whether the ambient temperature of the liquid cooling system is extremely low. It can be understood that the preset temperature threshold is lower than the lower limit of the ambient temperature range in which the liquid cooling system can normally work. In an extremely low temperature environment, the volume of the low-temperature coolant in the liquid cooling system will decrease due to thermal expansion and contraction, which will cause the inlet pressure of the main circulating pump to be too low. For the main circulating pump in the liquid cooling system, when the inlet pressure (the pressure of the input end) is less than or equal to a preset low-pressure alarm value, the start of the main circulating pump will cause damage to the equipment, and therefore, in this case, even if the main circulating pump can be opened, the liquid cooling system will automatically shut down to prevent damage to the equipment. When the inlet pressure of the main circulating pump is less than or equal to a preset pump stop pressure value, the liquid cooling system cannot be started. The preset pump stop pressure value is less than the preset low-pressure alarm value. Therefore, when the ambient temperature of the liquid cooling system is extremely low, the inlet pressure of the main circulating pump can be detected before the main circulating pump is opened. If the inlet pressure is less than or equal to the preset low-pressure alarm value, appropriate measures should be taken to increase the inlet pressure so that the main circulating pump can be opened and normally run.

[0040] S202: If the inlet pressure of the main circulating pump is less than or equal to the preset low-pressure alarm value, the liquid supplement device and / or the electric valve of the system bypass of the liquid cooling system are controlled based on the preset low-pressure alarm value, the preset pump stop pressure value and the inlet pressure, so that the inlet pressure is greater than the preset low-pressure alarm value.

[0041] In the embodiments of the present application, when the inlet pressure is less than or equal to the preset low-pressure alarm value, the inlet pressure can be raised according to the size of the inlet pressure by selecting the following three control modes. The first control mode is to raise the pressure in the liquid cooling system pipeline by controlling the liquid supplement device to supplement liquid to the liquid cooling system, so as to raise the inlet pressure of the main circulating pump. The second control mode is to raise the inlet pressure of the main circulating pump by opening the system bypass to reduce the pressure loss of the pipeline. The third control mode is to raise the inlet pressure of the main circulating pump by combining liquid supplement and bypass.

[0042] The above and other aspects of the present application will become more apparent by describing in detail the embodiments thereof with reference to the attached drawings, wherein: Figure 3 to the drawings Figure 6 The above three control modes will be described in detail.

[0043] In the embodiment of the above first control mode, referring to Figure 3 , the implementation process of step S202 can include:

[0044] If the inlet pressure of the main circulating pump is less than or equal to the preset pump stop pressure value, the liquid supplement device is controlled to supplement liquid to the liquid cooling system until the inlet pressure is monitored to be greater than the preset low-pressure alarm value, and the liquid supplement device is controlled to stop supplementing liquid.

[0045] In the present embodiment, the liquid supplement device mainly includes a liquid supplement pump and a liquid supplement tank. The above control of the liquid supplement device to supplement liquid to the system means that the liquid supplement pump is controlled to be turned on, so that the cooling liquid in the liquid supplement tank flows into the system pipeline through the liquid supplement port on the main circulating loop of the system. Since the liquid supplement is always performed until the inlet pressure of the main circulating pump is greater than the preset low-pressure alarm value in the above embodiment, the amount of liquid supplement is large, and thus it can cause the inlet pressure of the main circulating pump to gradually increase after the main circulating pump is started due to the temperature rise of the cooling liquid, and even can be higher than the preset high-pressure alarm value, which is a pressure alarm value set to prevent the inlet pressure from being too high. Therefore, in the above embodiment, measures to prevent high-pressure alarm should also be considered.

[0046] Further, in the embodiment shown in Figure 3 , after the liquid supplement device is controlled to stop supplementing liquid, the liquid cooling system control method of the present application can further include:

[0047] S301: Control the main circulating pump to be turned on.

[0048] S302: When the inlet pressure is monitored to be greater than or equal to the preset high-pressure alarm value, control the liquid discharge device of the liquid cooling system to discharge liquid until the inlet pressure is between the preset low-pressure alarm value and the preset high-pressure alarm value.

[0049] It should be understood that the preset high-pressure alarm value is greater than the preset low-pressure alarm value.

[0050] Optionally, the liquid draining device can be a safety valve, which is arranged after the output end of the main circulating pump. When liquid draining is needed, the safety valve is opened.

[0051] Further, the step S301 can include:

[0052] The main circulating pump is controlled to be turned on and run at a preset first frequency. The preset first frequency is lower than the normal working frequency of the main circulating pump.

[0053] It should be noted that when the inlet pressure of the main circulating pump is lower than the preset low pressure alarm value, if the main circulating pump is turned on and directly runs at the normal working frequency, a large amount of bubbles will be formed in the cooling liquid in the system pipeline. When the bubbles contact the blades of the main circulating pump, the bubbles will collapse, thereby causing cavitation and damaging the main circulating pump, thereby affecting the service life of the equipment. Therefore, when the main circulating pump is turned on, the main circulating pump needs to be controlled to run at a lower frequency.

[0054] Referring to Figure 3 After the step S301, the liquid cooling system control method can further include:

[0055] When it is monitored that the inlet pressure is less than the preset high pressure alarm value, the main circulating pump is controlled to gradually increase the running frequency until the inlet pressure is greater than or equal to the preset high pressure alarm value.

[0056] In this embodiment, after the main circulating pump is turned on, the working frequency of the main circulating pump can be controlled to gradually increase through PID adjustment until the inlet pressure of the main circulating pump is greater than or equal to the preset high pressure alarm value, and the working frequency is no longer increased. Specifically, the supply and return liquid difference of the CDU (Coolant Distribution Unit) in the liquid cooling system is taken as the control target, and the working frequency of the main circulating pump is adjusted through PID according to the target pressure difference.

[0057] The above embodiment, when receiving the start instruction of the main circulating pump, directly detects that the inlet pressure of the main circulating pump is less than the preset pump stop pressure value, and the main circulating pump cannot be started. Therefore, before the main circulating pump is started, the liquid cooling system is first supplemented with liquid until the inlet pressure of the main circulating pump is greater than the preset low pressure warning value, and then the liquid supplementing is stopped. Then, the main circulating pump is started, and initially runs at a low first frequency. Then, the working frequency of the main circulating pump is gradually increased through PID adjustment, and when the inlet pressure of the main circulating pump is greater than or equal to the preset high pressure warning value, the working frequency is no longer increased, and the liquid in the liquid cooling system is discharged, so that the inlet pressure of the main circulating pump is maintained between the preset low pressure warning value and the preset high pressure warning value, thereby realizing stable operation of the main circulating pump, and further ensuring normal operation of the liquid cooling system.

[0058] In the above embodiment of the second control mode, the reference Figure 4 The implementation process of step S202 can include:

[0059] If the inlet pressure is greater than the preset pump stop pressure value and less than or equal to the preset low pressure warning value, the control system opens the bypass electric valve.

[0060] Optionally, the control system bypass electric valve opening includes: the control system bypass electric valve is opened, and the opening degree of the electric valve is maximum.

[0061] In this embodiment, when receiving the start instruction of the main circulating pump, it is directly detected that the inlet pressure is greater than the preset pump stop pressure value but less than or equal to the preset low pressure warning value. In this case, the main circulating pump can still be started, but in order to avoid being forced to stop after starting, the bypass can be opened to increase the pressure. In theory, the inlet pressure can also be increased by supplementing liquid, but compared with the supplementing liquid method, the bypass opening method is more cost-effective for adjusting the pressure.

[0062] Further, in the embodiment shown in Figure 4 The liquid cooling system control method of the application can further include:

[0063] S401: Control the main circulating pump to start.

[0064] S402: When it is monitored that the inlet pressure is greater than the preset low pressure warning value and less than the preset high pressure warning value, the opening degree of the system bypass electric valve is gradually reduced until it is monitored that the inlet pressure is greater than or equal to the preset high pressure warning value, and the system bypass electric valve is closed.

[0065] It can be understood that after the system bypass is opened and the main circulating pump is started, the inlet pressure of the main circulating pump is gradually increased, and when the inlet pressure is greater than the preset low pressure warning value, the system bypass pressure increasing effect can be weakened by reducing the opening degree of the system bypass electric valve.

[0066] Further, the step S401 can include:

[0067] Controlling the main circulating pump to start and run at a preset first frequency.

[0068] Referring to Figure 4 After the step S401, the liquid cooling system control method further includes:

[0069] When the inlet pressure is greater than the preset low pressure alarm value and less than the preset high pressure alarm value, controlling the main circulating pump to gradually increase the running frequency until the inlet pressure is greater than or equal to the preset high pressure alarm value.

[0070] The above embodiment, before starting the main circulating pump, the inlet pressure of the main circulating pump is increased by opening the system bypass, and in the initial running stage of the main circulating pump, the main circulating pump is first run at a lower working frequency to ensure that the equipment is not damaged. When the inlet pressure is greater than the preset low pressure alarm value, the working frequency of the main circulating pump is gradually increased, and the opening degree of the system bypass electric valve is continuously reduced. When the inlet pressure is greater than or equal to the preset high pressure alarm value, the electric valve of the system bypass is controlled to be closed to prevent the inlet pressure from being too high to cause an alarm. Finally, the inlet pressure of the main circulating pump can be maintained between the preset low pressure alarm value and the preset high pressure alarm value, and the main circulating pump runs stably.

[0071] In an embodiment of the above third control mode, referring to Figure 5 The implementation process of the step S202 can include:

[0072] If the inlet pressure is less than or equal to the preset pump stop pressure value, controlling the liquid supplement device to supplement the liquid cooling system until the inlet pressure is greater than the preset pump stop pressure value, then controlling the liquid supplement device to stop supplementing the liquid and controlling the electric valve of the system bypass to open.

[0073] In the embodiment, the control of the liquid supplement device to supplement the liquid cooling system mainly includes two implementation modes. In the first implementation mode, the liquid supplement device at least includes a liquid supplement pump and a liquid supplement tank, and the liquid supplement port connected to the liquid supplement device can be arranged between the liquid inlet end of the heat exchanger and the liquid inlet port of the main circulating loop. When supplementing liquid is needed, the liquid supplement pump is controlled to start, and the electric valve of the liquid supplement port is controlled to open at the same time. At this time, the cooling liquid in the liquid supplement tank is pumped out and flows into the pipeline of the main circulating loop through the liquid supplement port. Correspondingly, when stopping supplementing liquid is needed, the liquid supplement pump is controlled to stop, and the electric valve of the liquid supplement port is controlled to close at the same time.

[0074] In the second implementation, the liquid supplementing device comprises at least a liquid supplementing tank, and a heater is arranged in the liquid supplementing tank. Moreover, the distance between the highest water level of the liquid in the liquid supplementing tank and the top wall of the liquid supplementing tank is greater than a first value, so that the liquid supplementing tank contains liquid and gas, and the heater can be used to heat the liquid or the gas in the liquid supplementing tank. In addition, the liquid supplementing port of the liquid cooling system is in communication with the input end of the main circulating pump, that is, the liquid supplementing port is arranged at the inlet of the main circulating pump. When liquid supplementing is needed, the heater is controlled to be turned on, and the electric valve of the liquid supplementing port is controlled to be turned on, so that the cooling liquid in the liquid supplementing tank flows into the pipeline of the main circulating loop. This is because, in an extremely low temperature environment, when the gas or the liquid in the liquid supplementing tank is heated, the air pressure above the liquid increases, which pushes a small amount of the cooling liquid in the liquid supplementing tank to the liquid supplementing port, thereby achieving the effect of supplementing the liquid cooling system. At the same time, under the pushing action of the hot air, the pressure of the liquid supplementing port gradually increases, thereby increasing the pressure of the entire pipeline and the inlet pressure of the main circulating pump.

[0075] In the above embodiment, when the initial inlet pressure is less than the preset pump stop pressure value, the inlet pressure of the main circulating pump can be first increased to the preset pump stop pressure value by means of liquid supplementing. Then, the liquid supplementing is ended, and the inlet pressure is continuously increased by means of opening the bypass, so that the main circulating pump is finally stably operated. This staged pressure increasing mode combines the advantages of the liquid supplementing and the bypass opening, that is, the liquid supplementing is used to increase the inlet pressure when the inlet pressure is less than the preset pump stop pressure value, and the bypass opening is used to increase the inlet pressure when the main circulating pump has the opening condition. The liquid supplementing amount of the above embodiment is small, which saves the liquid supplementing resource on the one hand, and the liquid draining is usually not needed during the process of continuously increasing the working frequency of the main circulating pump, and only the opening degree of the system bypass needs to be adjusted.

[0076] In another embodiment of the above third control mode, referring to Figure 6 , the implementation process of step S202 can comprise:

[0077] If the inlet pressure is less than or equal to the preset pump stop pressure value, the heater is controlled to be turned on, and the electric valve of the liquid supplementing port is controlled to be turned on, so that the liquid in the liquid supplementing tank flows to the liquid supplementing port under the action of pressure; when it is monitored that the inlet pressure is greater than the preset pump stop pressure value, the electric valve of the system bypass is controlled to be turned on; and when it is detected that the inlet pressure is greater than the preset low pressure warning value, the heater is controlled to be turned off, and the electric valve of the liquid supplementing port is controlled to be turned off.

[0078] In this embodiment, the structure and principle of the liquid supplementing device can refer to Figure 5The second implementation manner of the embodiment shown will not be described herein. The embodiment is different from the previous embodiment in that when the inlet pressure is detected to be greater than the preset pump stop pressure value, the heater is not directly closed to end the liquid supplementing, but the heater and the electric valve of the liquid supplementing port are closed until the inlet pressure is greater than the preset low pressure alarm value. Moreover, the control method of the embodiment can increase the pressure through the parallel supplementing and bypassing control paths after the inlet pressure is greater than the pump stop pressure value, which can obviously increase the pressure increasing rate and realize rapid pressure increasing to enable the main circulating pump to rapidly reach a stable running state. It should be noted that the heater is still used to heat the gas or liquid to supplement the liquid in the embodiment, and the liquid draining is still not considered, so the embodiment has a fast pressure increasing rate and a simple and convenient control manner.

[0079] It can be understood that the third control manner can also have other implementation manners, i.e., the liquid supplementing pump and the heated liquid supplementing can be jointly performed when the inlet pressure is lower than the preset pump stop pressure value, then the liquid supplementing pump can be selected to be closed to continue the heated liquid supplementing after the inlet pressure is higher than the preset pump stop pressure value, and the bypassing manner is combined to increase the inlet pressure until the heated liquid supplementing is ended and the bypassing manner is gradually ended after the inlet pressure reaches the preset low pressure alarm value, and the specific implementation of each step can be referred to the foregoing implementation manners, which will not be described herein. In this way, the pump starting condition can be rapidly reached, and the subsequent liquid draining operation can be as little as possible to reduce the trouble.

[0080] The liquid cooling system control method provided by the embodiment can control the liquid cooling system by using the liquid supplementing, the bypassing or the supplementing and bypassing in cooperation according to the relationship between the inlet pressure of the main circulating pump of the liquid cooling system and the preset low pressure alarm value and the preset pump stop pressure value in the case that the main circulating pump cannot normally run due to the extremely low ambient temperature of the liquid cooling system, so as to increase the inlet pressure of the main circulating pump to enable the main circulating pump and the liquid cooling system to normally run. The control method is effective and convenient.

[0081] It should be understood that the size of the serial number of each step in the above embodiment does not mean the execution sequence, and the execution sequence of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment.

[0082] The embodiment also provides a controller, which is shown in Figure 7 The controller 700 can include at least one processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the at least one processor 710, and the processor 710 implements the steps in any of the above method embodiments when executing the computer program, for example Figure 2 The steps S201 to S202 in the embodiment shown.

[0083] For example, the computer program can be divided into one or more modules / units, one or more modules / units are stored in the memory 720 and executed by the processor 710 to complete the present application. The one or more modules / units can be a series of computer program segments capable of completing a specific function, which are used to describe the execution process of the computer program in the controller 700.

[0084] Those skilled in the art can understand that, Figure 7 The controller is only an example and does not constitute a limitation on the controller, and can include more or fewer components than illustrated, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0085] The processor 710 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0086] The memory 720 can be an internal storage unit of the controller, or an external storage device of the controller, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 720 is used to store the computer program and other programs and data required by the controller. The memory 720 can also be used to temporarily store data that has been output or will be output.

[0087] The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application does not limit to only one bus or one type of bus.

[0088] The liquid cooling system control method provided by the embodiments of the present application can be applied to a controller such as a computer, a wearable device, a vehicle-mounted device, a tablet computer, a notebook computer, a netbook, a personal digital assistant (PDA), an augmented reality (AR) / virtual reality (VR) device, a mobile phone, and the like. The embodiments of the present application do not limit the specific type of the controller.

[0089] The embodiments of the present application also provide a computer readable storage medium storing a computer program. The computer program is executed by a processor to implement the steps in each of the above-mentioned embodiments of the liquid cooling system control method.

[0090] The embodiments of the present application provide a computer program product. When the computer program product is run on a mobile terminal, the mobile terminal is caused to implement the steps in each of the above-mentioned embodiments of the liquid cooling system control method.

[0091] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the present application can implement all or part of the processes in the above-mentioned embodiments by a computer program to instruct related hardware to complete. The computer program can be stored in a computer readable storage medium. The computer program is executed by a processor to implement the steps of each of the above-mentioned method embodiments. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the photographing device / controller, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. For example, a U disk, a mobile hard disk, a magnetic disk or an optical disk, and the like.

[0092] In the above embodiments, the description of each embodiment has its own focus. The parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0093] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software manner depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0094] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent replacements; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A liquid cooling system control method, characterized by, The method comprises: In the case that the ambient temperature where the liquid cooling system is located is lower than a preset temperature threshold, when an opening instruction of a main circulating pump of the liquid cooling system is received, an inlet pressure of the main circulating pump is acquired; If the inlet pressure of the main circulating pump is less than or equal to a preset low-pressure alarm value, the liquid supplement device and / or the electric valve of system bypass of the liquid cooling system are controlled based on the preset low-pressure alarm value, a preset pump stop pressure value and the inlet pressure, so that the inlet pressure is greater than the preset low-pressure alarm value; wherein the preset pump stop pressure value is less than the preset low-pressure alarm value.

2. The liquid cooling system control method of claim 1, wherein, The control of the liquid supplement device of the liquid cooling system based on the preset low-pressure alarm value, the preset pump stop pressure value and the inlet pressure comprises: If the inlet pressure is less than or equal to the preset pump stop pressure value, the liquid supplement device is controlled to supplement liquid to the liquid cooling system until it is monitored that the inlet pressure is greater than the preset low-pressure alarm value, and then the liquid supplement device is controlled to stop supplementing liquid.

3. The liquid cooling system control method of claim 2, wherein, After the control of the liquid supplement device to stop supplementing liquid, the method further comprises: The main circulating pump is controlled to be opened; When it is monitored that the inlet pressure is greater than or equal to a preset high-pressure alarm value, a liquid discharge device of the liquid cooling system is controlled to discharge liquid until the inlet pressure is between the preset low-pressure alarm value and the preset high-pressure alarm value; wherein the preset high-pressure alarm value is greater than the preset low-pressure alarm value.

4. The liquid cooling system control method of claim 3, wherein, The control of the main circulating pump to be opened comprises: The main circulating pump is controlled to be opened and run at a preset first frequency; wherein the preset first frequency is lower than a normal working frequency of the main circulating pump; After the control of the main circulating pump to be opened and run at the preset first frequency, the method further comprises: When it is monitored that the inlet pressure is less than the preset high-pressure alarm value, the running frequency of the main circulating pump is gradually increased until the inlet pressure is greater than or equal to the preset high-pressure alarm value.

5. The liquid cooling system control method of claim 1, wherein, The control of the electric valve of system bypass of the liquid cooling system based on the preset low-pressure alarm value, the preset pump stop pressure value and the inlet pressure comprises: If the inlet pressure is greater than the preset pump stop pressure value and less than or equal to the preset low-pressure alarm value, the electric valve of system bypass is controlled to be opened.

6. The liquid cooling system control method of claim 5, wherein, After the control of the electric valve of system bypass to be opened, the method further comprises: The main circulating pump is controlled to be opened; When it is monitored that the inlet pressure is greater than the preset low-pressure alarm value and less than the preset high-pressure alarm value, the opening degree of the electric valve of system bypass is gradually reduced until it is monitored that the inlet pressure is greater than or equal to the preset high-pressure alarm value, and then the electric valve of system bypass is controlled to be closed; wherein the preset high-pressure alarm value is greater than the preset low-pressure alarm value.

7. The liquid cooling system control method of claim 6, wherein, The control of the main circulating pump to be opened comprises: The main circulating pump is controlled to be opened and run at a preset first frequency; wherein the preset first frequency is lower than a normal working frequency of the main circulating pump; After the control of the main circulating pump to be opened and run at the preset first frequency, the method further comprises: When the inlet pressure is greater than the preset low pressure alarm value and less than the preset high pressure alarm value, the main circulating pump is controlled to gradually increase the operating frequency until the inlet pressure is greater than or equal to the preset high pressure alarm value.

8. The liquid cooling system control method of claim 1, wherein, The control of the liquid supplement device and the electric valve of the system bypass of the liquid cooling system based on the preset low pressure alarm value, the preset pump stop pressure value and the inlet pressure comprises: If the inlet pressure is less than or equal to the preset pump stop pressure value, the liquid supplement device is controlled to supplement the liquid cooling system until the inlet pressure is greater than the preset pump stop pressure value, the liquid supplement device is controlled to stop supplementing, and the electric valve of the system bypass is controlled to open.

9. The liquid cooling system control method of claim 1, wherein, The liquid supplement port of the liquid cooling system is in communication with the input end of the main circulating pump, and the liquid supplement port is in communication with a liquid supplement tank in the liquid supplement device; a heater is further arranged in the liquid supplement tank, and the distance between the highest water level of the liquid in the liquid supplement tank and the top wall thereof is greater than a first value, and the heater is used for heating the liquid or gas in the liquid supplement tank; The control of the liquid supplement device and the electric valve of the system bypass of the liquid cooling system based on the preset low pressure alarm value, the preset pump stop pressure value and the inlet pressure comprises: If the inlet pressure is less than or equal to the preset pump stop pressure value, the heater is controlled to open, and the electric valve of the liquid supplement port is controlled to open, so that the liquid in the liquid supplement tank flows to the liquid supplement port under the action of pressure; when it is monitored that the inlet pressure is greater than the preset pump stop pressure value, the electric valve of the system bypass is controlled to open; when it is detected that the inlet pressure is greater than the preset low pressure alarm value, the heater is controlled to close, and the electric valve of the liquid supplement port is controlled to close.

10. A liquid cooling system, characterized by, The main circulating pump, the heat exchanger, the system bypass, the liquid supplement device and the controller for executing the liquid cooling system control method of any one of claims 1 to 9 are included; the system bypass is provided with an electric valve, and the input end of the main circulating pump is provided with a pressure sensor; The main circulating pump, the liquid cooling load and the heat exchanger are connected in series to form a main circulating loop, the main circulating pump, the system bypass and the heat exchanger are connected in series to form a bypass circulating loop, and the liquid supplement device is connected with the main circulating loop.

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