Phase change liquid cooling system, control method and electronic equipment

Abstract

The invention provides a phase change liquid cooling system, a control method and electronic equipment, and relates to the technical field of heat dissipation, the system comprises at least one liquid cooling node, a gas-liquid separation assembly, a first cooling unit and a second cooling unit, and a closed cooling loop is formed; the gas-liquid separation assembly receives the cooling medium output by the liquid cooling node and separates the cooling medium into a gas-phase cooling medium and a liquid-phase cooling medium; the first cooling unit is used for cooling the gas-phase cooling medium, and the second cooling unit is used for cooling the liquid-phase cooling medium; the control unit comprises a plurality of pressure sensors and a plurality of temperature sensors which are arranged in the closed cooling loop. Compared with the prior art, the gas-liquid mixed cooling medium can be separated, so that the cooling medium entering the first cooling unit is in a relatively pure gas state. The heat exchange area occupied by the liquid cooling medium in the first cooling unit is reduced, and the heat exchange efficiency of the first cooling unit is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of heat dissipation technology, and in particular to a phase change liquid cooling system and control method, and electronic equipment. Background Art

[0002] In the phase change liquid cooling system, the pure liquid cooling medium will undergo a phase change to produce gas after entering the server cold plate. After these gas-liquid mixed cooling media enter the plate heat exchanger, the original design function of the plate heat exchanger is to liquefy the gaseous cooling medium. However, a large amount of liquid cooling medium occupies part of the heat exchange area of ​​the heat exchanger, which seriously interferes with the liquefaction process of the gaseous cooling medium, resulting in a significant reduction in the phase change liquefaction effect. In order for the heat exchanger to achieve the predetermined heat exchange effect and meet the system heat dissipation requirements, a larger heat exchanger can only be designed. However, this measure brings many disadvantages. It not only increases the equipment cost, but also takes up more installation space. This problem is particularly prominent in application scenarios such as data centers that have extremely high requirements for space layout. Therefore, it is urgent to develop new technologies to solve these problems in the phase change liquid cooling system and improve the overall performance of the system. Summary of the invention

[0003] The present disclosure provides a phase change liquid cooling system and control method, and electronic equipment, which is mainly intended to solve the problem that the liquid cooling medium occupies part of the heat exchange area of ​​the heat exchanger, seriously interfering with the liquefaction process of the gaseous cooling medium, resulting in a significant reduction in the phase change liquefaction effect.

[0004] According to a first aspect of the present disclosure, there is provided a phase-change liquid cooling system, comprising: at least one liquid cooling node, a gas-liquid separation component, a first cooling unit, and a second cooling unit connected in sequence through pipelines to form a closed cooling loop; The gas-liquid separation component receives the cooling medium outputted by the liquid cooling node and separates the cooling medium into a gas phase cooling medium and a liquid phase cooling medium; the first cooling unit cools the gas phase cooling medium, and the second cooling unit cools the liquid phase cooling medium; It also includes a control unit, which includes: a plurality of pressure sensors and a plurality of temperature sensors arranged in a closed cooling circuit; the control unit controls the first cooling unit to maintain a target condensation pressure according to the collected pressure data of the first cooling unit, and controls the second cooling unit to maintain a target supercooling degree according to the collected pressure data and temperature data of the second cooling unit.

[0005] Optionally, the inlet of the gas-liquid separation component is connected to the liquid cooling outlet of the liquid cooling node, the gas phase outlet of the gas-liquid separation component is connected to the first inlet of the first cooling unit, and the first outlet of the first cooling unit is connected to the liquid inlet of the gas-liquid separation component.

[0006] Optionally, a pressure sensor is provided at the first outlet of the first cooling unit; The control unit adjusts the flow rate of the first flow path of the first cooling unit according to the first outlet pressure of the first cooling unit, so as to control the first cooling unit to maintain the target condensation pressure.

[0007] Optionally, the phase change liquid cooling system further includes: a first cooling unit regulating valve; The first cooling unit regulating valve is arranged on the pipeline connecting the first cooling unit and the external cooling device; The control unit further includes: a first regulating valve actuator; the control unit generates a first opening adjustment command according to the first outlet pressure of the first cooling unit and sends it to the first regulating valve actuator to adjust the opening of the first cooling unit regulating valve.

[0008] Optionally, the liquid phase outlet of the gas-liquid separation component is connected to the first inlet of the second cooling unit, and the first outlet of the second cooling unit is connected to the liquid cooling inlet of the liquid cooling node.

[0009] Optionally, a pressure sensor and a temperature sensor are arranged at the first outlet of the second cooling unit; The control unit queries the temperature-pressure mapping table according to the first outlet pressure of the second cooling unit to obtain the corresponding saturation temperature, and calculates the current subcooling degree based on the saturation temperature and the first outlet temperature of the second cooling unit; The control unit adjusts the flow rate of the first flow path of the second cooling unit according to the current subcooling degree, so as to control the second cooling unit to maintain the target subcooling degree.

[0010] Optionally, the phase change liquid cooling system further includes: a second cooling unit regulating valve; The second cooling unit regulating valve is arranged on the pipeline connecting the second cooling unit and the external cooling device; The control unit further includes: a second regulating valve actuator; the control unit generates a second opening adjustment command according to the current subcooling degree and sends it to the second regulating valve actuator to adjust the opening of the first cooling unit regulating valve.

[0011] Optionally, the second inlets of the first cooling unit and the second cooling unit are respectively connected to the liquid cooling outlet of the external cooling device, and the second outlets of the first cooling unit and the second cooling unit are respectively connected to the liquid cooling inlet of the external cooling device.

[0012] Optionally, the phase change liquid cooling system further includes: a regenerator; One end of the heat regeneration pipeline of the regenerator is connected to the first outlet of the second cooling unit, and the other end is connected to the liquid cooling inlet of the liquid cooling node; The regenerator is used to heat the cooling medium output by the second cooling unit to reduce the subcooling degree of the cooling medium.

[0013] Optionally, the regenerator includes a heating pipeline; One end of the heating pipeline is connected to the liquid cooling outlet of the liquid cooling node, and the other end is connected to the input port of the gas-liquid separation component; The high-temperature cooling medium in the heating pipeline heats the low-temperature cooling medium in the regenerative pipeline.

[0014] Optionally, the regenerator includes an electric heater; The electric heater is arranged on the regenerative pipeline and is used to heat the low-temperature cooling medium in the regenerative pipeline.

[0015] Optionally, the phase change liquid cooling system further includes: a circulation pump unit; The circulation pump unit is arranged on the connecting pipeline between the first outlet of the second cooling unit and the liquid cooling inlet of the liquid cooling node; The circulation pump unit includes: at least two circulation pumps and the same number of one-way valves; at least two circulation pumps are connected in parallel, and a one-way valve is arranged at the output port of each circulation pump.

[0016] According to the second aspect of the present disclosure, there is provided a control method for a phase change liquid cooling system, including: Obtain the first outlet pressure of the first cooling unit and the first outlet pressure of the second cooling unit through the pressure sensors arranged at the first outlets of the first cooling unit and the second cooling unit; obtain the first outlet temperature of the second cooling unit through the temperature sensor arranged at the first outlet of the second cooling unit; Query the temperature-pressure mapping table according to the first outlet pressure of the second cooling unit to obtain the corresponding saturation temperature, and calculate the current degree of subcooling based on the saturation temperature and the first outlet temperature of the second cooling unit; Input the deviation value between the current degree of subcooling and the target degree of subcooling into the feedback control algorithm to generate a first opening adjustment instruction, and adjust the opening of the regulating valve of the second cooling unit until the deviation value between the current degree of subcooling and the target degree of subcooling converges to the first threshold range; Input the difference between the first outlet pressure of the first cooling unit and the target condensation pressure into the feedback control algorithm to generate a second opening adjustment instruction, and adjust the opening of the regulating valve of the first cooling unit until the difference between the first outlet pressure of the first cooling unit and the target condensation pressure converges to the second threshold range; Obtain the detected flow rate of the closed cooling loop, input the difference between the target flow rate and the detected flow rate into the feedback control algorithm, and adjust the rotational speed of the circulation pump until the difference between the detected flow rate and the target flow rate converges to the third threshold range.

[0017] According to the third aspect of the present disclosure, there is provided an electronic device, including: the phase change liquid cooling system described in the first aspect above.

[0018] The present disclosure provides a phase change liquid cooling system, a control method, and an electronic device, relating to the technical field of heat dissipation. In the present disclosure, a gas-liquid separation component is connected to the secondary side of the first cooling unit to receive the cooling medium output by the liquid cooling node. This design can effectively separate the gas-liquid mixed cooling medium, so that the cooling medium entering the first cooling unit is relatively pure gas. Compared with the situation in the related art where a large amount of liquid working medium occupies the heat exchange area of the plate heat exchanger, the present disclosure allows the first cooling unit to fully exert its function of liquefying the gaseous working medium, improving the heat exchange efficiency of the first cooling unit. The primary side of the second cooling unit is connected in parallel with the primary side of the first cooling unit, and this structure enables the primary side cooling medium to distribute heat more reasonably. During actual operation, the first cooling unit and the second cooling unit can adjust the flow rate and heat exchange effect of the primary side cooling medium respectively according to the states of the secondary side cooling media connected to them. The control unit obtains data through the pressure sensor and temperature sensor arranged on the secondary side of the second cooling unit, and accordingly controls the second cooling unit to maintain the target subcooling degree. Precise subcooling degree control can effectively avoid the gasification of the cooling medium at the inlet of the circulation pump, preventing cavitation of the circulation pump caused by the generation of bubbles. By precisely controlling the subcooling degree, the stable operation of the circulation pump is ensured, the service life of the circulation pump is extended, and the reliability of the system is improved. The control unit controls the first cooling unit to maintain the target condensation pressure according to the pressure data of the secondary side of the first cooling unit, and controls the second cooling unit to maintain the target subcooling degree according to the pressure and temperature data of the secondary side of the second cooling unit. This precise control method enables the phase change liquid cooling system to dynamically adjust the working states of the first cooling unit and the second cooling unit according to the actual heat dissipation requirements of the liquid cooling node. Under different load conditions, the system can ensure that the cooling medium is in the best heat dissipation state, achieving efficient heat dissipation.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to better understand the solution and do not constitute a limitation to the present disclosure. Among them: Figure 1 is a schematic structural diagram of a phase change liquid cooling system provided by an embodiment of the present disclosure; Figure 2 is a schematic structural diagram of another phase change liquid cooling system provided by an embodiment of the present disclosure; Figure 3 is a schematic structural diagram of another phase change liquid cooling system provided by an embodiment of the present disclosure; Figure 4 is a schematic structural diagram of another phase change liquid cooling system provided by an embodiment of the present disclosure; Figure 5 Schematic flow chart of a control method for a phase change liquid cooling system provided by an embodiment of the present disclosure. Specific embodiments

[0021] The following describes exemplary embodiments of the present disclosure with reference to the accompanying drawings. Various details of the embodiments of the present disclosure are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, descriptions of well-known functions and structures are omitted below for clarity and conciseness.

[0022] The phase change liquid cooling system, control method, and electronic device according to embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0023] Figure 1 Schematic structural diagram of a phase change liquid cooling system provided by an embodiment of the present disclosure. As Figure 1 shown, the system includes at least one liquid cooling node 10, a gas-liquid separation component 11, a first cooling unit 12, and a second cooling unit 13 that are sequentially connected through pipelines and form a closed cooling loop.

[0024] The gas-liquid separation component 11 receives the cooling medium output by the liquid cooling node 10 and separates the cooling medium into a gaseous cooling medium and a liquid-phase cooling medium; the first cooling unit 12 cools the gaseous cooling medium, and the second cooling unit 13 cools the liquid-phase cooling medium.

[0025] In an embodiment of the present disclosure, the gas-liquid separation component 11 is connected to the secondary side of the first cooling unit 12, and the gas-liquid separation component 11 receives the cooling medium output by the liquid cooling node 10; one end of the secondary side of the second cooling unit 13 is connected to the gas-liquid separation component 11, and the other end is connected to the liquid cooling node 10; the primary side of the second cooling unit 13 is connected in parallel with the primary side of the first cooling unit 12. It should be noted that in the present disclosure, the side of the flow paths of the first cooling unit 12 and the second cooling unit 13 that is connected to the gas-liquid separation component 11 to form a closed cooling loop is the secondary side, and the side connected to the external cooling device is the primary side. The gas-liquid separation component 11 and the secondary side of the first cooling unit 12 are connected through a connecting pipeline. The liquid cooling node 10 is a device that needs to be cooled, such as a server that needs to be cooled. During operation, the liquid cooling node 10 generates and outputs a cooling medium in a gas-liquid mixed state, and these cooling media will directly enter the gas-liquid separation component 11. The gas-liquid separation component 11 separates the gas-liquid mixed cooling medium entering it, causing the gas and liquid to converge in different regions respectively, thereby realizing effective gas-liquid separation. One end of the secondary side of the second cooling unit 13 is connected to the gas-liquid separation component 11, and the other end is connected to the liquid cooling node 10. Specifically, the liquid part separated by the gas-liquid separation component 11 will flow into the first inlet of the second cooling unit 13 and undergo a heat exchange process inside the second cooling unit 13. The primary side of the second cooling unit 13 is connected in parallel with the primary side of the first cooling unit 12. This parallel connection enables the primary side cooling medium to perform targeted heat exchange respectively according to the state differences of the secondary side cooling media when flowing through the first cooling unit 12 and the second cooling unit 13.

[0026] During actual operation, the primary side cooling medium flows in from the outside. After being distributed by the pipeline, it enters the primary side of the first cooling unit 12 and the primary side of the second cooling unit 13 respectively. When the gaseous cooling medium separated by the gas-liquid separation component 11 enters the secondary side of the first cooling unit 12, the primary side cooling medium (the cooling working medium of the external cooling device) of the first cooling unit 12 will absorb the heat of the gaseous cooling medium on the secondary side, promoting the liquefaction of the gaseous cooling medium. At the same time, the primary side cooling medium of the second cooling unit 13 further cools the liquid cooling medium from the gas-liquid separation component 11 to make the liquid cooling medium reach a lower temperature, that is, to achieve a subcooled state. The cooling medium cooled by the second cooling unit 13 then flows into the liquid cooling node 10 to enhance the heat dissipation effect of the liquid cooling node 10.

[0027] The design of this connection method and workflow effectively improves the heat dissipation performance and operation efficiency of the entire phase change liquid cooling system. The gas-liquid separation component 11 ensures that the cooling medium entering the first cooling unit 12 is mainly in a gaseous state, improving the heat exchange efficiency of the first cooling unit 12; the parallel connection of the second cooling unit 13 with the primary side of the first cooling unit 12 and its subcooling treatment of the cooling medium further optimize the heat dissipation capacity of the cooling medium, providing a more efficient and stable heat dissipation guarantee for the liquid cooling node 10.

[0028] It also includes a control unit 14, and the control unit 14 includes: a plurality of pressure sensors 141 and a plurality of temperature sensors 142 arranged in a closed cooling loop; the control unit 14 controls the first cooling unit 12 to maintain the target condensation pressure according to the collected pressure data of the first cooling unit, and controls the second cooling unit 13 to maintain the target subcooling degree according to the collected pressure data and temperature data of the second cooling unit.

[0029] In the embodiment of the present disclosure, the control unit 14 includes: a plurality of pressure sensors 141 and a plurality of temperature sensors 142; the pressure sensors 141 can be arranged on, but not limited to, the secondary side or the primary side of the second cooling unit 13, and the secondary side or the primary side of the first cooling unit 12; the temperature sensors 142 can be arranged on, but not limited to, the secondary side or the primary side of the second cooling unit 13.

[0030] A plurality of pressure sensors 141 are respectively arranged on the second cooling unit 13 and the first cooling unit 12. On the secondary side of the second cooling unit 13, the pressure sensor 141 real-time monitors the pressure data of the cooling medium flowing through this part. These pressure data reflect the pressure state of the cooling medium inside the second cooling unit 13. Since the second cooling unit 13 needs to cool the cooling medium to an appropriate subcooling degree, and pressure is one of the key parameters affecting subcooling degree. By accurately obtaining the pressure data, the system can timely adjust the flow rate of the cooling medium on the primary side of the second cooling unit 13 or other related parameters to maintain the target subcooling degree. Similarly, the pressure sensor 141 arranged on the first cooling unit 12 is used to real-time collect the pressure data of the gaseous cooling medium during the liquefaction process in the first cooling unit 12. The main function of the first cooling unit 12 is to re-liquefy the gaseous cooling medium, and pressure is an important factor affecting the liquefaction effect. The pressure data obtained by the pressure sensor 141 can provide real-time information for controlling the operation of the first cooling unit 12, such as adjusting the opening of the regulating valve of the first cooling unit to ensure that the first cooling unit 12 operates stably at the target condensation pressure, thereby ensuring that the liquefaction process of the cooling medium is efficient and stable.

[0031] The temperature sensor 142 is provided in the second cooling unit 13 to measure the temperature of the cooling medium of the second cooling unit 13. Temperature data is crucial for the calculation of supercooling, which depends on the temperature and pressure data of the cooling medium. Through the real-time temperature data obtained by the temperature sensor 142 and the pressure data collected by the pressure sensor 141, the system can accurately calculate the supercooling of the cooling medium of the second cooling unit 13. Based on this calculation result, the control unit 14 can accurately control the operation of the second cooling unit 13 so that the cooling medium reaches and maintains the target supercooling, thereby ensuring the normal operation of the circulating pump, avoiding the occurrence of cavitation, and improving the reliability of the entire system.

[0032] The present disclosure provides a phase change liquid cooling system, which is connected to the secondary side of the first cooling unit through a gas-liquid separation component to receive the cooling medium output by the liquid cooling node 10. This design can effectively separate the cooling medium mixed with gas and liquid, so that the cooling medium entering the first cooling unit is a relatively pure gaseous state. Compared with the situation in the related art where a large amount of liquid working medium occupies the heat exchange area of ​​the plate heat exchanger, the present disclosure allows the first cooling unit to fully exert the function of liquefying the gaseous working medium and improve the heat exchange efficiency of the first cooling unit. The primary side of the second cooling unit is connected in parallel with the primary side of the first cooling unit. This structure enables the primary side cooling medium to distribute heat more reasonably. In actual operation, the first cooling unit and the second cooling unit can adjust the flow rate and heat exchange effect of the primary side cooling medium respectively according to the state of the secondary side cooling medium connected to each other. The control unit obtains data through the pressure sensor 141 and the temperature sensor 142 arranged on the secondary side of the second cooling unit, and controls the second cooling unit to maintain the target supercooling accordingly. Accurate supercooling control can effectively avoid the gasification of the cooling medium at the inlet of the circulating pump and prevent the generation of bubbles from causing cavitation to the circulating pump. By precisely controlling the degree of subcooling, the stable operation of the circulation pump is ensured, the service life of the circulation pump is extended, and the reliability of the system is improved. The control unit controls the first cooling unit to maintain the target condensing pressure according to the pressure data on the secondary side of the first cooling unit, and controls the second cooling unit to maintain the target degree of subcooling according to the pressure and temperature data on the secondary side of the second cooling unit. This precise control method enables the phase change liquid cooling system to dynamically adjust the working state of the first cooling unit and the second cooling unit according to the actual heat dissipation requirements of the liquid cooling node 10. Under different load conditions, the system can ensure that the cooling medium is in the best heat dissipation state to achieve efficient heat dissipation.

[0033] Furthermore, in a possible implementation of this embodiment, as Figure 2 As shown, the inlet of the gas-liquid separation component 11 is connected to the liquid cooling outlet of the liquid cooling node 10, the gas phase outlet of the gas-liquid separation component 11 is connected to the first inlet of the first cooling unit 12, and the first outlet of the first cooling unit 12 is connected to the liquid inlet of the gas-liquid separation component 11.

[0034] Specifically, in the embodiments of the present disclosure, the gas-liquid separation component 11 plays a key gas-liquid separation role in the entire system. Its inlet is stably connected to the liquid cooling outlet of the liquid cooling node 10 through a specific pipeline, and this connection method ensures that the gas-liquid mixed cooling medium generated during the operation of the liquid cooling node 10 can smoothly flow into the gas-liquid separation component 11. When the gas-liquid mixed cooling medium enters the gas-liquid separation component 11, based on the internal structure and working principle of the gas-liquid separation component 11, the gas-liquid two-phase is effectively separated therein. Specifically, the gas with a smaller density moves upward and converges to the upper region of the gas-liquid separation component 11; while the liquid with a larger density sinks downward and accumulates in the lower region of the gas-liquid separation component 11.

[0035] The gas phase part separated by the gas-liquid separation component 11 is connected to the first inlet of the first cooling unit 12 through the gas phase outlet. This connection enables the separated gaseous cooling medium to smoothly enter the secondary side channel of the first cooling unit 12. In the first cooling unit 12, the gaseous cooling medium on the secondary side exchanges heat with the primary side cooling medium. The primary side cooling medium is usually a medium with good heat conduction performance, such as softened water, ethylene glycol aqueous solution, etc. During the heat exchange process, the primary side cooling medium absorbs the heat of the gaseous cooling medium on the secondary side, prompting the gaseous cooling medium to undergo a liquefaction phase change and transform from a gaseous state to a liquid state. The liquefied cooling medium flows out from the first outlet of the first cooling unit 12 and is connected to the liquid inlet of the gas-liquid separation component 11 through a pipeline. Such a connection design, on the one hand, can re-circulate the liquefied cooling medium in the first cooling unit 12 back to the gas-liquid separation component 11 to achieve the recycling of the cooling medium; on the other hand, the re-circulated cooling medium can also supplement the liquid in the gas-liquid separation component 11 to maintain the stability of the liquid level in the gas-liquid separation component 11.

[0036] Furthermore, in a possible implementation manner of this embodiment, as Figure 2 shown, a pressure sensor 141 is provided at the first outlet of the first cooling unit 12; the control unit 14 adjusts the flow rate of the first flow path of the first cooling unit 12 according to the pressure at the first outlet of the first cooling unit 12 to control the first cooling unit 12 to maintain the target condensation pressure.

[0037] Specifically, in the embodiments of the present disclosure, the pressure sensor 141 is installed at the first outlet (secondary side) of the first cooling unit 12 to collect the pressure data at this position in real time. After converting the pressure signal into an electrical signal, the sensor transmits it to the control unit 14. The control unit 14 pre-stores the target condensation pressure parameter. After receiving the first outlet pressure data, it compares it with the target condensation pressure. If the first outlet pressure deviates from the target condensation pressure, the control unit 14 activates the regulation mechanism, calls the preset control algorithm according to the deviation amount, and generates a flow rate adjustment instruction. This instruction is transmitted to the adjustment component (such as a control valve, a variable frequency pump, etc.) of the first flow path of the first cooling unit 12, and the dynamic adjustment of the flow rate of the cooling working medium in the first flow path is realized by changing the opening degree or rotation speed of the adjustment component. The system continuously monitors the first outlet pressure and repeatedly adjusts the flow rate of the first flow path until the difference between the first outlet pressure and the target condensation pressure converges within the allowable error range, ensuring that the first cooling unit 12 stably maintains the target condensation pressure.

[0038] Further, in a possible implementation manner of this embodiment, as Figure 2 shown, the phase change liquid cooling system further includes: a first cooling unit control valve 15; the first cooling unit control valve 15 is arranged on the pipeline connecting the first cooling unit 12 and the external cooling device; the control unit 14 further includes: a first control valve actuator 143; the control unit 14 generates a first opening degree adjustment instruction according to the first outlet pressure of the first cooling unit 12 and sends it to the first control valve actuator 143 to adjust the opening degree of the first cooling unit control valve 15.

[0039] Specifically, in the embodiments of the present disclosure, the first cooling unit control valve 15 is arranged on the connecting pipeline between the second outlet of the first cooling unit 12 and the liquid cooling inlet of the external cooling device; the control unit 14 is used to adjust the opening degree of the first cooling unit control valve 15 according to the first outlet pressure of the first cooling unit 12.

[0040] The second outlet of the first cooling unit 12 is the channel through which the cooled working fluid flows out after the heat exchange is completed. The working fluid exchanges heat with the gaseous cooling medium on the primary side and secondary side of the first cooling unit 12, absorbs the heat of the gaseous cooling medium, promotes its liquefaction, and its own temperature rises accordingly. The outlet of the working fluid is the terminal of the primary side circulation of the phase change liquid cooling system where the working fluid flows out and then enters the subsequent cooling cycle or treatment link. The regulating valve 15 of the first cooling unit is arranged on the connecting pipeline between the two, and can directly control the flow rate and pressure of the working fluid flowing out from the primary side of the first cooling unit 12, thereby affecting the heat exchange efficiency of the first cooling unit 12 and the liquefaction effect of the gaseous cooling medium on the secondary side. In the control of the first cooling unit 12, the control unit 14 obtains the real-time pressure data of the first outlet through the pressure sensor 141 arranged at the first outlet of the first cooling unit 12. The control unit 14 compares and analyzes the real-time pressure data of the first outlet of the first cooling unit 12 with the target condensation pressure.

[0041] Further, in a possible implementation manner of this embodiment, as Figure 2 shown, the liquid phase outlet of the gas-liquid separation component 11 is connected to the first inlet of the second cooling unit 13, and the first outlet of the second cooling unit 13 is connected to the liquid cooling inlet of the liquid cooling node 10.

[0042] Specifically, in the embodiment of the present disclosure, the separated liquid phase part of the gas-liquid separation component 11 is connected to the first inlet of the second cooling unit 13 through the liquid phase outlet. After the liquid phase cooling medium enters the second cooling unit 13, it exchanges heat with the primary side cooling medium again inside the second cooling unit 13. The purpose of this heat exchange is to further cool the liquid phase cooling medium to a subcooled state. The primary side of the second cooling unit 13 is connected in parallel with the primary side of the first cooling unit 12. When the primary side cooling medium flows through the second cooling unit 13, it will take away the heat of the secondary side cooling medium, making the temperature of the secondary side cooling medium drop to a state lower than its saturation temperature, that is, subcooling is achieved. The cooled medium after the subcooling treatment flows out from the first outlet of the second cooling unit 13 and is connected to the liquid cooling inlet of the liquid cooling node 10 through a dedicated pipeline. In this way, the subcooled cooling medium re-enters the liquid cooling node 10 and can absorb the heat generated by the liquid cooling node 10 more efficiently, thereby improving the heat dissipation capacity of the entire system.

[0043] The gas-liquid separation component 11 is connected to the second cooling unit 13 and the liquid cooling node 10 through specific pipelines. After the gas-liquid separation component 11 completes the separation of the gas-liquid mixed cooling medium, its liquid phase outlet serves as the output channel for the liquid cooling medium, and is physically connected to the first inlet of the second cooling unit 13 through a pipeline to ensure that the separated liquid cooling medium can be stably transported to the second cooling unit 13. The first outlet of the second cooling unit 13 is connected to the liquid cooling inlet of the liquid cooling node 10 through a pipeline, forming a transmission path for the liquid cooling medium to enter the liquid cooling node 10 from the second cooling unit 13. This connection enables the cooling medium processed by the second cooling unit 13 to flow into the internal flow path of the liquid cooling node 10 for heat exchange to achieve the heat dissipation function. This connection method ensures the orderly circulation of the cooling medium among the gas-liquid separation component 11, the second cooling unit 13, and the liquid cooling node 10, ensuring the stable operation of the system cooling function.

[0044] Further, in a possible implementation manner of this embodiment, as Figure 2 shown, a pressure sensor 141 and a temperature sensor 142 are provided at the first outlet of the second cooling unit 13; the control unit 14 queries the temperature-pressure mapping table based on the pressure at the first outlet of the second cooling unit 13 to obtain the corresponding saturation temperature, and calculates the current degree of subcooling based on the saturation temperature and the temperature at the first outlet of the second cooling unit 13; the control unit 14 adjusts the flow rate of the first flow path of the second cooling unit 13 according to the current degree of subcooling to control the second cooling unit 13 to maintain the target degree of subcooling.

[0045] Specifically, in the embodiment of the present disclosure, a pressure sensor 141 and a temperature sensor 142 are respectively provided at the first outlet of the second cooling unit 13 for real-time acquisition of key operation parameters. The pressure sensor 141 obtains the pressure data at the first outlet of the second cooling unit 13, and the temperature sensor 142 synchronously collects the temperature data at the corresponding position and transmits the two types of data to the control unit 14.

[0046] The control unit 14 internally stores a temperature-pressure mapping table constructed based on the physical properties of the cooling medium. After receiving the pressure data, the control unit 14 queries according to the mapping table to determine the saturation temperature value corresponding to the current pressure. Subsequently, the control unit 14 combines the actual temperature data collected by the temperature sensor 142 and obtains the current degree of subcooling by calculating the difference between the saturation temperature and the actual temperature.

[0047] The system preset the target subcooling degree as an operating parameter. The control unit 14 compares the current subcooling degree with the target subcooling degree, and generates a flow rate adjustment instruction according to the deviation amount. This instruction is transmitted to the adjustment components (such as regulating valves, circulation pumps) of the first flow path of the second cooling unit 13, and the flow rate of the cooling medium in the first flow path is adjusted by changing the working state of the adjustment components, thereby adjusting the heat exchange efficiency of the second cooling unit 13. The system continuously monitors the subcooling degree and dynamically adjusts the flow rate until the deviation between the current subcooling degree and the target subcooling degree converges to an allowable range, ensuring that the second cooling unit 13 stably maintains the target subcooling degree for operation.

[0048] Further, in a possible implementation manner of this embodiment, as Figure 2 shown, the phase change liquid cooling system further includes: a regulating valve 16 of the second cooling unit; the regulating valve 16 of the second cooling unit is arranged on the pipeline connecting the second cooling unit 13 and the external cooling device; the control unit 14 further includes: a second regulating valve actuator 144; the control unit 14 generates a second opening degree adjustment instruction according to the current subcooling degree, and sends it to the second regulating valve actuator 144 to adjust the opening degree of the regulating valve 16 of the second cooling unit.

[0049] Specifically, in the embodiment of the present disclosure, the regulating valve 16 of the second cooling unit is a key component for adjusting the heat exchange performance of the second cooling unit 13, and is installed on the pipeline connecting the second cooling unit 13 and the external cooling device, and the heat exchange is adjusted by controlling the flow rate of the cooling medium flowing through the pipeline.

[0050] The second regulating valve actuator 144 included in the control unit 14 is the core component for receiving and executing the adjustment instruction. During the operation of the system, the control unit 14 calculates the current subcooling degree based on the pressure and temperature data collected at the first outlet of the second cooling unit 13. The current subcooling degree is compared with the preset target subcooling degree, and according to the deviation between the two, a second opening degree adjustment instruction is generated through the built-in control algorithm.

[0051] This instruction is transmitted to the second regulating valve actuator 144 to drive it to control the valve core displacement of the regulating valve 16 of the second cooling unit and change the valve opening degree. When the current subcooling degree is higher than the target value, the instruction controls the valve opening degree to increase, increasing the flow rate of the cooling medium flowing through the second cooling unit 13 and improving the heat exchange efficiency to reduce the subcooling degree; conversely, when the current subcooling degree is lower than the target value, the instruction controls the valve opening degree to decrease, reducing the flow rate of the cooling medium and reducing the heat exchange intensity to increase the subcooling degree. Through continuous monitoring and dynamic adjustment, it is ensured that the second cooling unit 13 maintains the target subcooling degree for operation.

[0052] Further, in a possible implementation manner of this embodiment, as Figure 2As shown, the second inlets of the first cooling unit 12 and the second cooling unit 13 are respectively connected to the liquid cooling outlet of an external cooling device, and the second outlets of the first cooling unit 12 and the second cooling unit 13 are respectively connected to the liquid cooling inlet of the external cooling device.

[0053] Specifically, in the embodiments of the present disclosure, the first cooling unit 12 and the second cooling unit 13 form a two-way connection with the external cooling device through specific pipelines. The second inlet of the first cooling unit 12 and the second inlet of the second cooling unit 13 are respectively connected to the liquid cooling outlet of the external cooling device through dedicated pipelines, constituting the input channel of the cooling working medium, ensuring that the low-temperature cooling working medium after being cooled by the external cooling device can be stably transported to the first and second cooling units. At the same time, the second outlet of the first cooling unit 12 and the second outlet of the second cooling unit 13 are respectively connected to the liquid cooling inlet of the external cooling device through corresponding pipelines, forming the return channel of the cooling working medium. The heated cooling working medium after heat exchange in the first and second cooling units returns to the external cooling device through this channel for re-cooling treatment. This two-way connection design constructs a complete cooling working medium circulation loop, realizing the closed-loop flow of the cooling working medium between the first cooling unit 12, the second cooling unit 13 and the external cooling device, and ensuring the continuous and stable heat exchange of the system.

[0054] Further, in a possible implementation manner of this embodiment, as Figure 3 shown, the phase change liquid cooling system further includes: a recuperator 17; one end of the recuperation pipeline of the recuperator 17 is connected to the first outlet of the second cooling unit 13, and the other end is connected to the liquid cooling inlet of the liquid cooling node 10; the recuperator 17 is used to heat the cooling medium output by the second cooling unit 13 to reduce the subcooling degree of the cooling medium.

[0055] Specifically, in the embodiments of the present disclosure, the recuperator 17 is connected to other components in the system through specific recuperation pipelines. One end of the recuperation pipeline is tightly connected to the first outlet of the second cooling unit 13, and this connection enables the cooling medium output from the second cooling unit 13 to flow smoothly into the recuperator 17. The function of the second cooling unit 13 is to cool the cooling medium to a subcooled state to ensure the stable operation of the circulation pump and improve the reliability of the system, but too low subcooling degree may be unfavorable for the heat exchange efficiency of the liquid cooling node 10 in some cases. The other end of the recuperation pipeline is connected to the liquid cooling inlet of the liquid cooling node 10, providing a passage for the cooling medium processed by the recuperator 17 to enter the liquid cooling node 10. The recuperator 17 is internally provided with a special heat exchange structure, and its working principle is based on the heat exchange mechanism. When the cooling medium flowing out from the first outlet of the second cooling unit 13 enters the recuperator 17, the recuperator 17 heats the cooling medium by using its own energy exchange method.

[0056] The heating process of the regenerator 17 is not a simple energy input. Instead, it transfers heat to the cooling medium by recovering the heat from other parts of the system or using a specific energy conversion method. During this process, the cooling medium absorbs heat, and its degree of subcooling gradually decreases. The decrease in the degree of subcooling helps to improve the heat exchange efficiency of the cooling medium at the liquid cooling node 10 because an appropriate degree of subcooling allows the cooling medium to more effectively undergo a phase change when absorbing the heat at the liquid cooling node 10, thereby enhancing the heat dissipation effect.

[0057] Furthermore, in a possible implementation of this embodiment, as Figure 3 shown, the regenerator 17 includes a heating pipeline; one end of the heating pipeline is connected to the liquid cooling outlet of the liquid cooling node 10, and the other end is connected to the input port of the gas-liquid separation assembly 11; the high-temperature cooling medium in the heating pipeline heats the low-temperature cooling medium in the regenerative pipeline.

[0058] Specifically, in the embodiment of the present disclosure, one end of the heating pipeline is reliably connected to the liquid cooling outlet of the liquid cooling node 10. During the operation of the liquid cooling node 10, a large amount of heat is generated. After the cooling medium absorbs this heat, its temperature rises and it flows out from the liquid cooling outlet in a high-temperature state. These high-temperature cooling media flow along the heating pipeline, providing a heat source for subsequent heat exchange. The other end of the heating pipeline is connected to the input port of the gas-liquid separation assembly 11, and this connection ensures that the high-temperature cooling medium flowing out from the liquid cooling node 10 can smoothly enter the gas-liquid separation assembly 11.

[0059] The heating pipeline of the regenerator 17 closely cooperates with the regenerative pipeline to achieve heat exchange of the cooling medium. One end of the regenerative pipeline is connected to the first outlet of the second cooling unit 13, and the other end is connected to the liquid cooling inlet of the liquid cooling node 10. The cooling medium flowing out from the first outlet of the second cooling unit 13 is in a subcooled state and has a relatively low temperature, and it flows along the regenerative pipeline. When the low-temperature cooling medium flows in the regenerative pipeline, the high-temperature cooling medium in the heating pipeline exchanges heat with it. After the low-temperature cooling medium in the regenerative pipeline absorbs heat, its temperature rises and the degree of subcooling decreases.

[0060] This heat exchange mechanism can effectively utilize the waste heat of the cooling medium in the system. On the one hand, by reducing the degree of subcooling of the cooling medium in the regenerative pipeline, the heat absorption efficiency of the cooling medium when entering the liquid cooling node 10 is improved, and the heat dissipation effect of the liquid cooling node 10 is enhanced. On the other hand, after the high-temperature cooling medium in the heating pipeline releases heat, its temperature decreases when entering the gas-liquid separation assembly 11, which helps the gas-liquid separation assembly 11 to perform the gas-liquid separation work more stably, reduces the fluctuation of the gas-liquid separation effect caused by the entry of the high-temperature cooling medium, and improves the operation stability and heat dissipation efficiency of the entire phase change liquid cooling system.

[0061] Furthermore, in a possible implementation of this embodiment, asFigure 4 As shown, the regenerator 17 includes an electric heater; the electric heater is arranged on the regenerative pipeline and is used to heat the low-temperature cooling medium in the regenerative pipeline.

[0062] Specifically, in the embodiment of the present disclosure, one end of the regenerative pipeline is connected to the first outlet of the second cooling unit 13, so that the low-temperature cooling medium in the supercooled state output from the second cooling unit 13 can smoothly flow into the regenerative pipeline; the other end is connected to the liquid cooling inlet of the liquid cooling node 10, providing a passage for the processed cooling medium to enter the liquid cooling node 10.

[0063] The electric heater is installed in the regenerative pipeline, and its main function is to heat the low-temperature cooling medium flowing through the regenerative pipeline. During the heating process, the operation of the electric heater is precisely regulated by the control unit of the system. The control unit is based on the preset program and the actual operating parameters of the system. By heating the low-temperature cooling medium in the regenerative pipeline through the electric heater, the degree of supercooling of the cooling medium is effectively controlled. The appropriate degree of supercooling enables the cooling medium to more efficiently absorb the heat generated by the liquid cooling node 10 when entering the liquid cooling node 10, improving the heat dissipation efficiency of the liquid cooling node 10, and thus ensuring the stable and efficient operation of the entire phase change liquid cooling system.

[0064] Furthermore, in a possible implementation manner of this embodiment, as Figure 4 shown, the phase change liquid cooling system further includes: a circulation pump unit 18; the circulation pump unit 18 is arranged on the connecting pipeline between the first outlet of the second cooling unit 13 and the liquid cooling inlet of the liquid cooling node 10. The circulation pump unit 18 includes: at least two circulation pumps and the same number of one-way valves; at least two circulation pumps are connected in parallel, and a one-way valve is arranged at the outlet of each circulation pump.

[0065] Specifically, in the embodiment of the present disclosure, the first outlet of the second cooling unit 13 is the channel through which the cooling medium flows out of the second cooling unit. The cooled cooling medium has a lower temperature and a stable supercooled state here, preparing for efficiently absorbing the heat generated by the liquid cooling node 10. The liquid cooling inlet of the liquid cooling node 10 is the inlet channel for the cooling medium to enter the interior of the liquid cooling node 10 to achieve the heat dissipation function.

[0066] From the perspective of the setting of the circulation pumps, at least two circulation pumps are connected in parallel. This parallel connection structure has significant advantages and a specific working mechanism. The parallel connection also provides a redundant backup function for the system. Since each circulation pump is independent, when one of the circulation pumps fails, the other circulation pumps can immediately take over the work tasks of the failed pump, maintain the circulation of the cooling medium, and prevent the system cooling from failing due to the failure of a single pump. This redundant design greatly improves the reliability of the system, especially suitable for application scenarios with extremely high requirements for heat dissipation stability, such as the heat dissipation of data center servers, high-performance computing chips and other devices. Looking at the configuration of the check valve, a check valve is correspondingly arranged at the outlet of each circulation pump. When the circulation pump is in operation, the check valve opens, allowing the cooling medium output by the circulation pump to pass through smoothly and enter the subsequent cooling circulation pipeline. When a certain circulation pump stops working or fails, the check valve will quickly close to prevent the cooling medium output by other running circulation pumps from flowing back into the stopped or failed circulation pump.

[0067] Figure 5 The flowchart of a control method for a phase change liquid cooling system provided by an embodiment of the present disclosure.

[0068] As Figure 5 shown, the method includes the following steps: Step 201, obtain the pressure at the first outlet of the first cooling unit and the pressure at the first outlet of the second cooling unit through the pressure sensors arranged at the first outlets of the first cooling unit and the second cooling unit; obtain the temperature at the first outlet of the second cooling unit through the temperature sensor arranged at the first outlet of the second cooling unit.

[0069] In the embodiment of the present disclosure, the system realizes key data acquisition by means of pressure sensors respectively arranged at the first outlet of the second cooling unit and the first outlet of the first cooling unit. The pressure sensor at the first outlet of the second cooling unit continuously collects the pressure data of the cooling medium at the first outlet of the second cooling unit, and the pressure sensor at the first outlet of the first cooling unit synchronously collects the pressure data of the gaseous cooling medium at the first outlet of the first cooling unit. At the same time, the temperature sensor arranged at the first outlet of the second cooling unit continuously collects the temperature data of the cooling medium at the first outlet of the second cooling unit. These sensors transmit the collected data to the system control unit in real time, providing basic data support for the subsequent analysis and regulation of the system.

[0070] Step 202, query the temperature-pressure mapping table according to the pressure at the first outlet of the second cooling unit to obtain the corresponding saturation temperature, and calculate the current degree of subcooling based on the saturation temperature and the temperature at the first outlet of the second cooling unit.

[0071] In an embodiment of the present disclosure, after the control unit obtains the first outlet pressure data of the second cooling unit in step 201, it will perform a query operation in a pre-stored temperature-pressure mapping table. This temperature-pressure mapping table is obtained through a large number of experiments and theoretical calculations based on the physical properties of the refrigerant, and accurately records the saturation temperature corresponding to different pressure values.

[0072] The control unit accurately matches the corresponding saturation temperature value in the mapping table according to the first outlet pressure of the second cooling unit. Subsequently, the control unit combines the first outlet temperature data of the second cooling unit obtained from the temperature sensor and obtains the current degree of subcooling through a specific calculation logic. When calculating, subtract the first outlet temperature of the second cooling unit from the saturation temperature obtained by query, and the resulting difference is the current degree of subcooling. This degree of subcooling data will be used as a key basis for the subsequent regulation of the system to ensure the stable operation of the system.

[0073] Step 203: Input the deviation value between the current degree of subcooling and the target degree of subcooling into a feedback control algorithm to generate a first opening adjustment command, and adjust the opening of the regulating valve of the second cooling unit until the deviation value between the current degree of subcooling and the target degree of subcooling converges to a first threshold range.

[0074] In an embodiment of the present disclosure, the system first compares the current degree of subcooling calculated in step 202 with a pre-set target degree of subcooling, and calculates the deviation value between the two. Then, this deviation value will be input into the feedback control algorithm module. This feedback control algorithm is specifically designed based on the characteristics and control requirements of the system, such as the common proportional-integral-derivative (PID) control algorithm.

[0075] The algorithm generates a first opening adjustment command through a series of operations based on the input deviation value. This command is transmitted to the regulating valve of the second cooling unit to dynamically adjust its opening. During the adjustment process, the system continuously monitors the current degree of subcooling and continuously recalculates the deviation value from the target degree of subcooling. This cycle continues until the deviation value converges to a first threshold range, ensuring that the second cooling unit can maintain the cooling medium at an appropriate degree of subcooling and guaranteeing the stable operation of the system.

[0076] Step 204: Input the difference between the first outlet pressure of the first cooling unit and the target condensation pressure into a feedback control algorithm to generate a second opening adjustment command, and adjust the opening of the regulating valve of the first cooling unit until the difference between the first outlet pressure of the first cooling unit and the target condensation pressure converges to a second threshold range.

[0077] In an embodiment of the present disclosure, the pressure data at the first outlet of the first cooling unit is obtained and compared with a preset target condensation pressure, and the difference between the two is calculated. This difference is used as a key input parameter and sent to the feedback control algorithm module. The feedback control algorithm performs complex operations based on this difference. Commonly, such as based on the PID control logic, the data is processed according to the operation rules of proportional, integral, and differential.

[0078] After the algorithm operation, a second opening adjustment instruction is generated. This instruction is accurately transmitted to the regulating valve of the first cooling unit to dynamically adjust its opening. During the adjustment process, the system continuously monitors the pressure at the first outlet of the first cooling unit and recalculates the difference between it and the target condensation pressure. As the opening of the regulating valve is adjusted, the heat exchange efficiency of the first cooling unit changes, thereby affecting the pressure at the first outlet. Such cyclic adjustment is performed until the difference between the pressure at the first outlet of the first cooling unit and the target condensation pressure converges to a second threshold range, ensuring the stable operation of the first cooling unit and achieving efficient liquefaction of the gaseous cooling medium.

[0079] As an implementable manner of the embodiment of the present disclosure, during the operation regulation of the phase change liquid cooling system, the flow rate of the cooling medium in the system can be changed by adjusting the rotational speed of the circulation pump. Since there is a relationship between the flow rate of the cooling medium and the heat dissipation capacity of the system, effective control of the heat dissipation speed of the system can be achieved. The following methods can be used but are not limited to: obtaining the detected flow rate of the closed cooling loop, inputting the difference between the target flow rate and the detected flow rate into the feedback control algorithm, and adjusting the rotational speed of the circulation pump until the difference between the detected flow rate and the target flow rate converges to a third threshold range.

[0080] Specifically, in the embodiment of the present disclosure, the flow control link plays a key role in the entire cooling cycle. The system continuously obtains the detected flow rate of the cooling medium in the target pipeline through a flow sensor provided on the target pipeline between the first outlet of the second cooling unit and the working medium inlet of the liquid cooling node. Based on specific measurement principles such as electromagnetic induction and ultrasonic detection, the flow sensor converts the flow rate of the cooling medium in the pipeline into an identifiable signal form such as an electrical signal, and then obtains accurate detected flow rate data. The system preset a target flow rate according to factors such as the heat dissipation requirements of the liquid cooling node and the overall heat exchange efficiency of the system. The detected flow rate is compared with the target flow rate, and the difference between the two is calculated. This difference is input into the feedback control algorithm module, and the feedback control algorithm analyzes and operates on the difference according to preset rules, such as the common proportional-integral-differential algorithm rules.

[0081] After algorithmic operation and processing, a variable-frequency adjustment instruction is generated. This instruction is transmitted to the variable-frequency control device of the circulation pump to dynamically adjust the rotational speed of the circulation pump. When the detected flow rate is lower than the target flow rate, the variable-frequency adjustment instruction increases the rotational speed of the circulation pump, increasing the flow rate of the cooling medium in the target pipeline and thereby increasing the detected flow rate; conversely, when the detected flow rate is higher than the target flow rate, the variable-frequency adjustment instruction decreases the rotational speed of the circulation pump, reducing the flow rate of the cooling medium and decreasing the detected flow rate. During the entire adjustment process, the system continuously and real-time monitors the flow rate of the target pipeline and continuously calculates the difference between it and the target flow rate. With the dynamic adjustment of the rotational speed of the circulation pump, the flow rate of the target pipeline continuously changes until the difference between the flow rate of the target pipeline and the target flow rate converges to the third threshold range, thereby ensuring that the flow rate of the cooling medium in the target pipeline is stably maintained at an appropriate level, ensuring that the liquid-cooling node can obtain a stable cooling medium flow rate that meets the heat dissipation requirements, and maintaining the stable operation of the system.

[0082] It should be noted that the embodiments of the present disclosure may include multiple steps. For ease of description, these steps are numbered, but these numbers are not intended to limit the execution time slots or execution orders between the steps; these steps can be implemented in any order, and the embodiments of the present disclosure do not make any limitations in this regard.

[0083] An embodiment of the present application also provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any of the above-described embodiments of the control method of the phase change liquid cooling system.

[0084] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0085] The above has introduced in detail a phase change liquid cooling system, a control method, and an electronic device provided by the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A phase change liquid cooling system, characterized in that: include: At least one liquid cooling node, a gas-liquid separation component, a first cooling unit, and a second cooling unit are sequentially connected by pipelines to form a closed cooling loop; The gas-liquid separation component receives the cooling medium output by the liquid cooling node and separates the cooling medium into a gas phase cooling medium and a liquid phase cooling medium; the first cooling unit cools the gas phase cooling medium, and the second cooling unit cools the liquid phase cooling medium; It also includes a control unit, which includes: a plurality of pressure sensors and a plurality of temperature sensors arranged in the closed cooling circuit; the control unit controls the first cooling unit to maintain a target condensing pressure according to the collected pressure data of the first cooling unit, and controls the second cooling unit to maintain a target supercooling degree according to the collected pressure data and temperature data of the second cooling unit.

2. The phase change liquid cooling system according to claim 1, characterized in that: The inlet of the gas-liquid separation component is connected to the liquid cooling outlet of the liquid cooling node, the gas phase outlet of the gas-liquid separation component is connected to the first inlet of the first cooling unit, and the first outlet of the first cooling unit is connected to the liquid inlet of the gas-liquid separation component.

3. The phase change liquid cooling system according to claim 2, characterized in that: The first outlet of the first cooling unit is provided with the pressure sensor; The control unit adjusts a flow rate of a first flow path of the first cooling unit according to a first outlet pressure of the first cooling unit, so as to control the first cooling unit to maintain a target condensation pressure.

4. The phase change liquid cooling system according to claim 3, characterized in that: The phase change liquid cooling system further includes: a first cooling unit regulating valve; The first cooling unit regulating valve is arranged on a pipeline connecting the first cooling unit and an external cooling device; The control unit further includes: a first regulating valve actuator; the control unit generates a first opening adjustment instruction according to a first outlet pressure of the first cooling unit, and sends the first regulating valve actuator to adjust the opening of the regulating valve of the first cooling unit.

5. The phase change liquid cooling system according to claim 1, characterized in that: The liquid phase outlet of the gas-liquid separation component is connected to the first inlet of the second cooling unit, and the first outlet of the second cooling unit is connected to the liquid cooling inlet of the liquid cooling node.

6. The phase change liquid cooling system according to claim 5, characterized in that: The first outlet of the second cooling unit is provided with the pressure sensor and the temperature sensor; The control unit queries a temperature-pressure mapping table to obtain a corresponding saturation temperature according to the first outlet pressure of the second cooling unit, and calculates a current degree of subcooling based on the saturation temperature and the first outlet temperature of the second cooling unit; The control unit adjusts the flow rate of the first flow path of the second cooling unit according to the current supercooling degree, so as to control the second cooling unit to maintain the target supercooling degree.

7. The phase change liquid cooling system according to claim 6, characterized in that: The phase change liquid cooling system further includes: a second cooling unit regulating valve; The second cooling unit regulating valve is arranged on a pipeline connecting the second cooling unit and an external cooling device; The control unit further includes: a second regulating valve actuator; the control unit generates a second opening adjustment instruction according to the current supercooling degree, and sends the second regulating valve actuator to adjust the opening of the first cooling unit regulating valve.

8. The phase change liquid cooling system according to claim 1, characterized in that: The second inlets of the first cooling unit and the second cooling unit are respectively connected to the liquid cooling outlet of the external cooling device, and the second outlets of the first cooling unit and the second cooling unit are respectively connected to the liquid cooling inlet of the external cooling device.

9. The phase change liquid cooling system according to claim 1, characterized in that: The phase change liquid cooling system further comprises: a regenerator; One end of the heat recovery pipeline of the heat regenerator is connected to the first outlet of the second cooling unit, and the other end is connected to the liquid cooling inlet of the liquid cooling node; The regenerator is used to heat the cooling medium output by the second cooling unit to reduce the degree of supercooling of the cooling medium.

10. The phase change liquid cooling system according to claim 9, characterized in that: The regenerator comprises a heating pipeline; One end of the heating pipeline is connected to the liquid cooling outlet of the liquid cooling node, and the other end is connected to the input port of the gas-liquid separation component; The high-temperature cooling medium in the heating pipeline heats the low-temperature cooling medium in the heat recovery pipeline.

11. The phase change liquid cooling system according to claim 9, characterized in that: The regenerator comprises an electric heater; The electric heater is arranged on the heat recovery pipeline and is used for heating the low-temperature cooling medium in the heat recovery pipeline.

12. The phase change liquid cooling system according to claim 1, characterized in that: The phase change liquid cooling system further comprises: a circulation pump unit; The circulation pump unit is arranged on a connecting pipeline between the first outlet of the second cooling unit and the liquid cooling inlet of the liquid cooling node; The circulation pump unit comprises: at least two circulation pumps and the same number of one-way valves; the at least two circulation pumps are connected in parallel, and the output port of each circulation pump is provided with the one-way valve.

13. A control method for a phase change liquid cooling system, characterized in that: The method is applied to the phase change liquid cooling system according to any one of claims 1 to 12, and the method comprises: The first outlet pressure of the first cooling unit and the first outlet pressure of the second cooling unit are obtained by means of pressure sensors arranged at the first outlets of the first cooling unit and the second cooling unit; the first outlet temperature of the second cooling unit is obtained by means of a temperature sensor arranged at the first outlet of the second cooling unit; querying a temperature-pressure mapping table according to the first outlet pressure of the second cooling unit to obtain a corresponding saturation temperature, and calculating a current degree of subcooling based on the saturation temperature and the first outlet temperature of the second cooling unit; Inputting the deviation value between the current degree of subcooling and the target degree of subcooling into a feedback control algorithm, generating a first opening adjustment instruction, and adjusting the opening of the regulating valve of the second cooling unit until the deviation value between the current degree of subcooling and the target degree of subcooling converges to a first threshold range; The difference between the first outlet pressure of the first cooling unit and the target condensing pressure is input into the feedback control algorithm to generate a second opening adjustment instruction, and the opening of the first cooling unit regulating valve is adjusted until the difference between the first outlet pressure of the first cooling unit and the target condensing pressure converges to a second threshold range.

14. The control method of the phase change liquid cooling system according to claim 13, characterized in that: The method further comprises: The detected flow rate of the closed cooling loop is obtained, the difference between the target flow rate and the detected flow rate is input into the feedback control algorithm, and the rotation speed of the circulation pump is adjusted until the difference between the detected flow rate and the target flow rate converges to a third threshold range.

15. An electronic device, characterized in that: include: A phase change liquid cooling system as claimed in any one of claims 1 to 12.

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