Liquid cooling device control method and system and liquid cooling device

Abstract

The invention discloses a liquid cooling device control method and system and a liquid cooling device.The liquid cooling device comprises a heat exchanger, a primary side circulation unit and a secondary side circulation unit, the primary side circulation unit and the secondary side circulation unit are connected with the two ends of the heat exchanger, and the other end of the primary side circulation unit is connected with a cold source; the other end of the secondary side circulation unit is connected with a radiator arranged in an object needing to be cooled. The secondary side circulation unit comprises a second liquid return end and a second liquid supply end; the control method comprises the steps that a first threshold value and a second threshold value are calculated based on target temperature and adjustment precision; the liquid supply temperature of the second liquid supply end is detected in real time; and the flow of cold liquid flowing through the heat exchanger in the primary side circulation unit is adjusted according to the size relation between the liquid supply temperature and the first threshold value and the second threshold value. According to the control method, while the primary side flow adjusting precision is guaranteed, mechanical abrasion of an actuator is remarkably reduced, and the service life of equipment is prolonged; in addition, energy consumption of a cold source can be effectively reduced, and meanwhile pumping power loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling capacity regulation based on liquid cooling, and in particular to a liquid cooling device control method, system and liquid cooling device. Background Art

[0002] With the rapid development of cloud computing, artificial intelligence and high-performance computing technologies, the heat dissipation demand for data centers, server clusters and high-power electronic equipment has increased dramatically. Traditional air cooling technology has been unable to meet the high-density heat dissipation scenarios where the power of a single cabinet exceeds 20kW due to the low specific heat capacity of air and limited heat conduction efficiency.

[0003] Liquid cooling technology has gradually become a mainstream solution due to the high heat conduction efficiency of liquid media (1000-3000 times higher than air). Among them, cold plate liquid cooling systems are widely used due to their high maturity and low transformation cost.

[0004] Existing liquid cooling systems usually adopt a cold source architecture with separated primary and secondary sides. The primary side cycle provides basic cooling through the cold source (such as a cooling tower or dry cooler), and the secondary side cycle transports the cooling to the terminal radiator (such as a server cold plate) through the cold distribution unit (CDU).

[0005] However, such systems have the following technical bottlenecks:

[0006] Insufficient dynamic temperature control accuracy: Traditional methods rely on fixed thresholds or single PID adjustment, which is difficult to adapt to load mutation scenarios. For example, when the secondary side fluid supply temperature fluctuates due to equipment power consumption, the existing control strategy is prone to overshoot or lag, resulting in reduced heat dissipation efficiency or increased energy consumption.

[0007] Low efficiency in cooling capacity distribution: primary side flow regulation is mostly based on experience-based settings, lacking coordinated feedback with the real-time temperature on the secondary side, which can easily lead to a mismatch between the cooling source and the terminal demand. Especially in the scenario of multiple parallel branches, uneven flow distribution may lead to local overheating or cooling redundancy.

[0008] Insufficient energy consumption optimization: Existing systems often operate at a constant flow rate and do not dynamically adjust the refrigerant flow rate based on temperature differences.

[0009] In recent years, some studies have attempted to regulate flow through variable frequency pumps or electric valves, but there are still problems with response delays and limited control accuracy. Summary of the invention

[0010] The object of the present invention is to provide a liquid cooling device control method, system and liquid cooling device with dynamic flow matching and energy consumption optimization.

[0011] In order to achieve the above-mentioned object, the present invention provides a control method for a liquid cooling device, wherein the liquid cooling device comprises a heat exchanger and a primary-side circulation unit and a secondary-side circulation unit connected to both ends of the heat exchanger, the cold liquids in the primary-side circulation unit and the secondary-side circulation unit undergo heat exchange in the heat exchanger, the other end of the primary-side circulation unit is connected to a cold source, and the other end of the secondary-side circulation unit is connected to a radiator arranged in an object to be cooled; the primary-side circulation unit comprises a first liquid supply end for supplying cold liquid to the heat exchanger and a first liquid return end for recovering the cold liquid to the cold source; the secondary-side circulation unit comprises a second liquid return end for recovering the cold liquid to the heat exchanger and a second liquid supply end for outputting the cold liquid to the radiator;

[0012] The control method comprises:

[0013] Presetting a target temperature and an adjustment accuracy related to the cold liquid temperature of the second liquid supply end, and calculating a first threshold and a second threshold based on the target temperature and the adjustment accuracy, wherein the first threshold is greater than the second threshold;

[0014] Real-time detection of the liquid supply temperature of the second liquid supply end;

[0015] The flow rate of the cold liquid in the primary-side circulation unit passing through the heat exchanger is adjusted according to the relationship between the liquid supply temperature and the first threshold value and the second threshold value.

[0016] Preferably, when the liquid supply temperature satisfies the following condition 1, the flow rate of the cold liquid in the primary circulation unit flowing through the heat exchanger is increased; when the liquid supply temperature satisfies the following condition 2, the flow rate of the cold liquid in the primary circulation unit flowing through the heat exchanger is maintained at the current level; when the liquid supply temperature satisfies the following condition 3, the flow rate of the cold liquid in the primary circulation unit flowing through the heat exchanger is reduced;

[0017] Condition 1: T0 <TS-Td;

[0018] Condition 2: TS-Td≤T0 <TS+Td;

[0019] The third condition: T0≥TS+Td;

[0020] Wherein, T0 is the liquid supply temperature, TS is the target temperature, and Td is the adjustment accuracy.

[0021] Preferably, the liquid supply temperature of the second liquid supply end and the liquid return temperature of the second liquid return end are detected in real time, and the flow rate of the cold liquid in the secondary side circulation unit through the heat exchanger is controlled according to the difference between the liquid return temperature and the liquid supply temperature.

[0022] Preferably, the real-time liquid supply pressure of the second liquid supply end and the real-time liquid return pressure of the second liquid return end are detected in real time, and the flow rate of the cold liquid in the secondary side circulation unit through the heat exchanger is controlled according to the difference between the liquid return pressure and the liquid supply pressure.

[0023] The present invention also provides a liquid cooling device, comprising a heat exchanger and a primary circulation unit and a secondary circulation unit connected to both ends of the heat exchanger, wherein the cold liquids in the primary circulation unit and the secondary circulation unit undergo heat exchange in the heat exchanger, the other end of the primary circulation unit is connected to a cold source, and the other end of the secondary circulation unit is connected to a radiator arranged in an object to be cooled; the primary circulation unit comprises a first liquid supply end for supplying cold liquid to the heat exchanger and a first liquid return end for recovering the cold liquid to the cold source, and a flow regulating valve arranged at the first liquid supply end; the secondary circulation unit comprises a second liquid return end for recovering the cold liquid to the heat exchanger and a second liquid supply end for outputting the cold liquid to the radiator;

[0024] The liquid cooling device further comprises a controller and a first temperature sensor disposed at the second liquid supply end, wherein the first temperature sensor is used to detect the liquid supply temperature of the second liquid supply end;

[0025] The controller is connected to the first temperature sensor and the flow regulating valve;

[0026] The controller is capable of adjusting the opening of the flow control valve according to the relationship between the liquid supply temperature detected by the first temperature sensor and the first threshold and the second threshold;

[0027] The first threshold and the second threshold are calculated based on a preset target temperature and an adjustment accuracy, and the first threshold is greater than the second threshold.

[0028] Preferably, when the liquid supply temperature satisfies the following condition 1, the controller increases the opening of the flow control valve; when the liquid supply temperature satisfies the following condition 2, the controller maintains the opening of the flow control valve at a current level; when the liquid supply temperature satisfies the following condition 3, the controller reduces the opening of the flow control valve;

[0029] Condition 1: T0 <TS-Td;

[0030] Condition 2: TS-Td≤T0 <TS+Td;

[0031] The third condition: T0≥TS+Td;

[0032] Wherein, T0 is the liquid supply temperature, TS is the target temperature, and Td is the adjustment accuracy.

[0033] Preferably, the liquid cooling device also includes a second temperature sensor arranged at the second liquid return end, and a liquid supply pump arranged at the second liquid supply end, the second temperature sensor is used to detect the return liquid temperature of the second liquid return end, the controller is also connected to the second temperature sensor and the liquid supply pump, and the controller controls the output flow of the liquid supply pump according to the difference in detection values ​​between the second temperature sensor and the first temperature sensor.

[0034] Preferably, the liquid cooling device further comprises a first pressure sensor arranged at the second liquid supply end and a second pressure sensor arranged at the second liquid return end, and a liquid supply pump arranged at the second liquid supply end, wherein the first pressure sensor is used to detect the pressure of the cold liquid at the second liquid supply end, and the second pressure sensor is used to detect the pressure of the cold liquid at the second liquid return end;

[0035] The first pressure sensor, the second pressure sensor and the liquid supply pump are connected to the controller, and the controller controls the output flow of the liquid supply pump according to the difference between the detection values ​​of the second pressure sensor and the first pressure sensor.

[0036] The present invention also provides a liquid cooling device cooling capacity distribution control system, which comprises:

[0037] one or more processors;

[0038] Memory;

[0039] and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs including instructions for executing the liquid cooling device control method as described above.

[0040] The present invention also provides a computer-readable storage medium, which includes a computer program, and the computer program can be executed by a processor to implement the liquid cooling device control method as described above.

[0041] Compared with the prior art, the liquid cooling device control method provided by the above technical solution of the present invention calculates the first threshold (upper limit) and the second threshold (lower limit) by presetting the target temperature and the adjustment accuracy, forms a temperature threshold interval, and continuously monitors the temperature of the secondary side liquid supply end, and triggers the primary side flow adjustment based on the degree of deviation from the threshold interval. This logic significantly reduces the mechanical wear of the actuator (such as water pumps and valves) and extends the life of the equipment while ensuring the accuracy of the primary side flow regulation; moreover, due to the coordinated control of the primary side flow and the secondary side temperature, it can effectively reduce the energy consumption of the cold source (such as a chiller) and reduce the pumping power loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 14 is a system principle structure diagram of the liquid cooling device in an embodiment of the present invention.

[0043] Figure 2 It is a flow chart of a liquid cooling device control method in one embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0045] This embodiment discloses a liquid cooling device control method for use in regulating the cooling capacity distribution of the liquid cooling device.

[0046] like Figure 1 The liquid cooling device includes a heat exchanger H and a primary circulation unit D1 and a secondary circulation unit D2 connected to both ends of the heat exchanger H. The cold liquids in the primary circulation unit D1 and the secondary circulation unit D2 undergo heat exchange in the heat exchanger H. The other end of the primary circulation unit D1 is connected to a cold source, and the other end of the secondary circulation unit D2 is connected to a radiator arranged in an object to be cooled.

[0047] The primary circulation unit D1 includes a first liquid supply end D10 for supplying cold liquid to the heat exchanger H and a first liquid return end D11 for recovering the cold liquid to a cold source.

[0048] The secondary side circulation unit D2 includes a second liquid return end D21 for recovering the cold liquid to the heat exchanger H and a second liquid supply end D20 for outputting the cold liquid to an external radiator.

[0049] The working principle of the liquid cooling device is:

[0050] For the primary side circulation unit D1: the first liquid supply end D10 inputs the cold liquid output from the cold source (such as a cooling tower) into the heat exchanger H, and after exchanging heat with the cold liquid in the secondary side circulation unit D2, it becomes a cold liquid with a higher temperature and flows back to the cold source from the first liquid return end D11. After cooling in the cold liquid, it enters the heat exchanger H from the first liquid supply end D10.

[0051] For the secondary side circulation unit D2: the second liquid supply end D20 outputs the cold liquid with a lower temperature to the radiator in the cooling object (such as the server in the data center), which becomes the cold liquid with a higher temperature, and then flows back to the heat exchanger H through the second liquid return end D21 to exchange heat with the cold liquid with a lower temperature in the primary side circulation unit D1, and becomes the cold liquid with a lower temperature and outputs through the second liquid supply end D20.

[0052] Based on this, Figure 2 , the control method in this embodiment includes:

[0053] S10: Preset a target temperature and an adjustment accuracy related to the cold liquid temperature of the second liquid supply end D20, and calculate a first threshold and a second threshold based on the target temperature and the adjustment accuracy, wherein the first threshold is greater than the second threshold;

[0054] S11: Real-time detection of the liquid supply temperature of the second liquid supply end D20;

[0055] S12: adjusting the flow rate of the cold liquid in the primary circulation unit D1 through the heat exchanger H according to the relationship between the liquid supply temperature and the first threshold value and the second threshold value.

[0056] For the regulation of primary side flow, traditional single threshold or PID regulation is prone to frequent fluctuations near the temperature critical point (for example, repeatedly starting and stopping the valve within ±0.5°C), resulting in poor system stability. In this embodiment, the first threshold (upper limit) and the second threshold (lower limit) are calculated by presetting the target temperature and the adjustment accuracy to form a temperature threshold interval, and the temperature of the secondary side liquid supply end is continuously monitored. Based on the degree of deviation from the threshold interval, the primary side flow regulation is triggered. This logic significantly reduces the mechanical wear of actuators (such as water pumps and valves) and extends the life of the equipment while ensuring the accuracy of primary side flow regulation. Moreover, due to the coordinated control of the primary side flow and the secondary side temperature, the energy consumption of the cold source (such as a chiller) can be effectively reduced, while reducing the pumping power loss.

[0057] It should also be noted that the target temperature and adjustment accuracy can be flexibly set according to different heat dissipation scenarios (such as data centers, energy storage batteries).

[0058] In a complex liquid cooling system, multiple heat dissipation branches may interfere with each other's temperature due to uneven loads (for example, a sudden increase in power consumption in a branch causes overall temperature fluctuations). Traditional global temperature control strategies are difficult to take into account local mutations. In this embodiment, the adjustment accuracy parameters can match the heat dissipation tolerance of different objects (for example, the chip requires ±0.1°C, and the battery pack allows ±1°C), avoiding over-design.

[0059] On the other hand, when the liquid supply temperature satisfies the following condition 1, the flow rate of the cold liquid in the primary circulation unit D1 through the heat exchanger H is increased; when the liquid supply temperature satisfies the following condition 2, the flow rate of the cold liquid in the primary circulation unit D1 through the heat exchanger H is maintained at the current level; when the liquid supply temperature satisfies the following condition 3, the flow rate of the cold liquid in the primary circulation unit D1 through the heat exchanger H is reduced;

[0060] Condition 1: T0 <TS-Td;

[0061] Condition 2: TS-Td≤T0 <TS+Td;

[0062] Condition 3: T0≥TS+Td;

[0063] Among them, T0 is the liquid supply temperature, TS is the target temperature, and Td is the adjustment accuracy.

[0064] In this embodiment, TS+Td is the first threshold, and TS-Td is the second threshold.

[0065] When the temperature exceeds the first threshold (such as the target temperature + 0.3°C), the primary side flow rate is increased to quickly cool down;

[0066] When the temperature drops back to the second threshold (such as the target temperature -0.3°C), the flow rate is reduced to maintain a steady state and reduce energy consumption.

[0067] When the temperature is between the first threshold and the second threshold, the primary side flow rate is maintained unchanged.

[0068] Specifically, the liquid cooling device further includes a controller and a first temperature sensor T1 disposed at the second liquid supply end D20, and a flow regulating valve M disposed at the first liquid supply end D10. The first temperature sensor T1 is used to detect the liquid supply temperature of the second liquid supply end D20.

[0069] The controller is connected to the first temperature sensor T1 and the flow regulating valve M.

[0070] The controller can adjust the opening of the flow control valve M according to the relationship between the liquid supply temperature detected by the first temperature sensor T1 and the first threshold and the second threshold, so as to adjust the flow of the cold liquid flowing into the heat exchanger H on the primary side.

[0071] On the other hand, the liquid supply temperature of the second liquid supply end D20 and the liquid return temperature of the second liquid return end D21 are detected in real time, and the flow rate of the cold liquid in the secondary side circulation unit D2 through the heat exchanger H is controlled according to the difference between the liquid return temperature and the liquid supply temperature.

[0072] In this embodiment, the actual heat load of the terminal radiator (such as a server cold plate) is directly reflected by real-time monitoring of the temperature difference (ΔT = |T2-T1|) between the secondary side liquid supply end temperature (T1) and the return liquid end temperature (T2). The temperature difference ΔT is positively correlated with the heat load. When ΔT increases (heat load increases), the secondary side flow rate is automatically increased to enhance the heat exchange capacity and avoid the risk of equipment overheating due to insufficient heat dissipation. When ΔT decreases (heat load decreases), the system reduces the flow rate to reduce pumping energy consumption and avoid waste of cooling caused by overcooling.

[0073] Specifically, the liquid cooling device further includes a second temperature sensor T2 disposed at the second liquid return end D21, and a liquid supply pump W disposed at the second liquid supply end D20, the second temperature sensor T2 is used to detect the return liquid temperature of the second liquid return end D21, and the controller is further connected to the second temperature sensor T2 and the liquid supply pump W. The controller controls the output flow rate of the liquid supply pump W according to the difference between the detection values ​​of the second temperature sensor T2 and the first temperature sensor T1.

[0074] On the other hand, another method to control the secondary side flow is as follows:

[0075] The real-time liquid supply pressure of the second liquid supply end D20 and the real-time liquid return pressure of the second liquid return end D21 are detected in real time, and the flow rate of the cold liquid in the secondary side circulation unit D2 passing through the heat exchanger H is controlled according to the difference between the liquid return pressure and the liquid supply pressure.

[0076] In this embodiment, the total flow resistance of the circulation pipeline can be directly reflected by real-time monitoring of the pressure difference (ΔP = |P2-P1|) between the secondary side liquid supply pressure (P1) and the return liquid pressure (P2). When the terminal load suddenly changes (such as a surge in server power consumption) and causes the local pipeline resistance to increase, ΔP will increase instantaneously. The secondary side flow rate is immediately increased through pressure difference feedback to avoid heat dissipation delays or local overheating caused by insufficient flow. When the pipeline resistance decreases (such as partial load hibernation), ΔP decreases, automatically reducing the flow rate, significantly saving energy consumption.

[0077] Specifically, the liquid cooling device further includes a first pressure sensor P1 disposed at the second liquid supply end D20 and a second pressure sensor P2 disposed at the second liquid return end D21. The first pressure sensor P1 is used to detect the pressure of the cold liquid at the second liquid supply end D20, and the second pressure sensor P2 is used to detect the pressure of the cold liquid at the second liquid return end D21.

[0078] The first pressure sensor P1 and the second pressure sensor P2 are connected to the controller, and the controller controls the output flow rate of the liquid supply pump W according to the difference between the detection values ​​of the second pressure sensor P2 and the first pressure sensor P1.

[0079] In addition, the second liquid return end D21 is also provided with a flow meter L connected to the controller, and the controller can also control the flow of the liquid supply pump W according to the detection value of the flow meter L, so that the flow of the secondary side circulation unit D2 is maintained at a constant level.

[0080] The present invention also discloses another liquid cooling device control system, which includes one or more processors, a memory and one or more programs, wherein one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the program includes instructions for executing the liquid cooling device control method as described above. The processor can adopt a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for executing related programs to implement the functions required to be performed by the module in the liquid cooling device control system of the embodiment of the present application, or to execute the liquid cooling device control method of the method embodiment of the present application.

[0081] The present invention also discloses a computer-readable storage medium, which includes a computer program, and the computer program can be executed by a processor to complete the liquid cooling device control method as described above. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media integrated. The available medium can be a read-only memory (ROM), or a random access memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a tape, a magnetic disk, or an optical medium, such as a digital versatile disc (DVD), or a semiconductor medium, such as a solid state disk (SSD), etc.

[0082] The embodiment of the present application also discloses a computer program product or a computer program, which includes a computer instruction stored in a computer-readable storage medium. A processor of an electronic device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the electronic device executes the above-mentioned liquid cooling device control method.

[0083] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A liquid cooling device control method, characterized in that: The liquid cooling device comprises a heat exchanger and a primary circulation unit and a secondary circulation unit connected to both ends of the heat exchanger, the cold liquids in the primary circulation unit and the secondary circulation unit undergo heat exchange in the heat exchanger, the other end of the primary circulation unit is connected to a cold source, and the other end of the secondary circulation unit is connected to a radiator arranged in an object to be cooled; the primary circulation unit comprises a first liquid supply end for supplying cold liquid to the heat exchanger and a first liquid return end for recovering the cold liquid to the cold source; The secondary side circulation unit comprises a second liquid return end for recovering the cold liquid to the heat exchanger and a second liquid supply end for outputting the cold liquid to the radiator; The control method comprises: Presetting a target temperature and an adjustment accuracy related to the cold liquid temperature of the second liquid supply end, and calculating a first threshold and a second threshold based on the target temperature and the adjustment accuracy, wherein the first threshold is greater than the second threshold; Real-time detection of the liquid supply temperature of the second liquid supply end; The flow rate of the cold liquid in the primary-side circulation unit passing through the heat exchanger is adjusted according to the relationship between the liquid supply temperature and the first threshold value and the second threshold value.

2. The liquid cooling device control method according to claim 1, characterized in that: When the liquid supply temperature satisfies the following condition 1, the flow rate of the cold liquid in the primary circulation unit flowing through the heat exchanger is increased; when the liquid supply temperature satisfies the following condition 2, the flow rate of the cold liquid in the primary circulation unit flowing through the heat exchanger is maintained at the current level; when the liquid supply temperature satisfies the following condition 3, the flow rate of the cold liquid in the primary circulation unit flowing through the heat exchanger is reduced; Condition 1: T0 <TS-Td; Condition 2: TS-Td≤T0 <TS+Td; The third condition: T0≥TS+Td; Wherein, T0 is the liquid supply temperature, TS is the target temperature, and Td is the adjustment accuracy.

3. The liquid cooling device control method according to claim 1, characterized in that: The liquid supply temperature of the second liquid supply end and the liquid return temperature of the second liquid return end are detected in real time, and the flow rate of the cold liquid in the secondary side circulation unit passing through the heat exchanger is controlled according to the difference between the liquid return temperature and the liquid supply temperature.

4. The liquid cooling device control method according to claim 1, characterized in that: The real-time liquid supply pressure of the second liquid supply end and the real-time liquid return pressure of the second liquid return end are detected in real time, and the flow rate of the cold liquid in the secondary side circulation unit flowing through the heat exchanger is controlled according to the difference between the liquid return pressure and the liquid supply pressure.

5. A liquid cooling device, characterized in that: The invention comprises a heat exchanger and a primary circulation unit and a secondary circulation unit connected to both ends of the heat exchanger, wherein the cold liquids in the primary circulation unit and the secondary circulation unit undergo heat exchange in the heat exchanger, the other end of the primary circulation unit is connected to a cold source, and the other end of the secondary circulation unit is connected to a radiator arranged in an object to be cooled; the primary circulation unit comprises a first liquid supply end for supplying cold liquid to the heat exchanger and a first liquid return end for recovering the cold liquid to the cold source, and a flow regulating valve arranged at the first liquid supply end; the secondary circulation unit comprises a second liquid return end for recovering the cold liquid to the heat exchanger and a second liquid supply end for outputting the cold liquid to the radiator; The liquid cooling device further comprises a controller and a first temperature sensor disposed at the second liquid supply end, wherein the first temperature sensor is used to detect the liquid supply temperature of the second liquid supply end; The controller is connected to the first temperature sensor and the flow regulating valve; The controller is capable of adjusting the opening of the flow control valve according to the relationship between the liquid supply temperature detected by the first temperature sensor and the first threshold and the second threshold; The first threshold and the second threshold are calculated based on a preset target temperature and an adjustment accuracy, and the first threshold is greater than the second threshold.

6. The liquid cooling device according to claim 5, characterized in that: When the liquid supply temperature satisfies the following condition 1, the controller increases the opening of the flow control valve; when the liquid supply temperature satisfies the following condition 2, the controller maintains the opening of the flow control valve at a current level; when the liquid supply temperature satisfies the following condition 3, the controller decreases the opening of the flow control valve; Condition 1: T0 <TS-Td; Condition 2: TS-Td≤T0 <TS+Td; The third condition: T0≥TS+Td; Wherein, T0 is the liquid supply temperature, TS is the target temperature, and Td is the adjustment accuracy.

7. The liquid cooling device according to claim 5, characterized in that: The liquid cooling device also includes a second temperature sensor arranged at the second liquid return end, and a liquid supply pump arranged at the second liquid supply end, the second temperature sensor is used to detect the return liquid temperature of the second liquid return end, the controller is also connected to the second temperature sensor and the liquid supply pump, and the controller controls the output flow of the liquid supply pump according to the difference between the detection values ​​of the second temperature sensor and the first temperature sensor.

8. The liquid cooling device according to claim 5, characterized in that: The liquid cooling device further comprises a first pressure sensor arranged at the second liquid supply end and a second pressure sensor arranged at the second liquid return end, and a liquid supply pump arranged at the second liquid supply end, wherein the first pressure sensor is used to detect the pressure of the cold liquid at the second liquid supply end, and the second pressure sensor is used to detect the pressure of the cold liquid at the second liquid return end; The first pressure sensor, the second pressure sensor and the liquid supply pump are connected to the controller, and the controller controls the output flow of the liquid supply pump according to the difference between the detection values ​​of the second pressure sensor and the first pressure sensor.

9. A cooling capacity distribution control system for a liquid cooling device, characterized in that: include: one or more processors; Memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for executing the liquid cooling device control method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: The invention comprises a computer program, wherein the computer program can be executed by a processor to implement the liquid cooling device control method according to any one of claims 1 to 4.

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