Liquid cooling system and control method and controller thereof

Abstract

The invention discloses a liquid cooling system and a control method and a controller thereof, and relates to the technical field of immersed liquid cooling, the liquid cooling system comprises a heat exchanger, a circulating pump and a plurality of liquid cooling cabinets, the circulating pump is arranged between the liquid cooling cabinets and the heat exchanger, and the liquid cooling cabinets are connected with the heat exchanger. The circulating pump is used for pumping to-be-cooled liquid in each liquid cooling cabinet into the heat exchanger; an output port of the heat exchanger is communicated with a liquid inlet of the liquid cooling cabinet, and a receiving port of the heat exchanger is communicated with a liquid outlet of the liquid cooling cabinet; the liquid cooling system further comprises a supplementary cooling device, the supplementary cooling device comprises a collecting and supplementing box and liquid supplementing power equipment, all the liquid cooling cabinets are selectively communicated with the collecting and supplementing box, and the liquid supplementing power equipment is communicated between a liquid supplementing opening of the collecting and supplementing box and a receiving opening of the heat exchanger. And the liquid circulation between the liquid to be cooled in the collecting and supplementing box and the cooled liquid in the heat exchanger is realized. The liquid cooling system and the control method thereof provided by the invention have the advantages of maintaining the heat dissipation function of the system and automatically supplementing liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of immersion liquid cooling, and particularly relates to a liquid cooling system, its control method, and a controller. Background Art

[0002] Immersion liquid cooling technology is a technology that fully immerses heat-generating electronic devices or core components in a coolant and uses the high heat conduction performance of the liquid to achieve efficient heat dissipation.

[0003] The application of immersion liquid cooling technology in a data center generally includes the following steps. First, the core components (such as servers) of the data center are fully immersed in a liquid cooling cabinet filled with a coolant; second, the low-temperature coolant enters the cabinet through the liquid inlet of the liquid cooling cabinet, directly contacts the server and absorbs the heat generated by the server. Since the heat conduction efficiency of the coolant is much higher than that of air, the heat can be quickly transferred from the server to the coolant; subsequently, the heated coolant is discharged through the liquid outlet of the cabinet, and under the drive of a circulation pump, the heated coolant is transported to a heat exchanger, and the heat exchanger transfers the heat in the high-temperature coolant to an external cooling system (such as a chiller or an air cooler), reducing the temperature of the coolant; finally, the low-temperature coolant cooled by the heat exchanger flows back to the liquid cooling cabinet again to complete a cycle. After multiple cycles, the heat dissipation of the server is completed.

[0004] In addition, the solution severely relies on the driving effect of the circulation pump. When the circulation pump fails, the high-temperature coolant cannot be transported to the heat exchanger, and the heat dissipation function fails. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems in the related art to a certain extent. For this purpose, the present invention provides a liquid cooling system, its control method, and a controller, which have the advantages of maintaining the system heat dissipation function and automatic liquid replenishment.

[0006] To achieve the above object, as the first aspect of the present invention, a liquid cooling system is provided. The liquid cooling system includes a heat exchanger, a circulation pump, and a plurality of liquid cooling cabinets. The circulation pump is arranged between the liquid cooling cabinet and the heat exchanger, and the circulation pump is used to pump the liquid to be cooled in each liquid cooling cabinet to the heat exchanger; the output port of the heat exchanger communicates with the liquid inlet of the liquid cooling cabinet, and the receiving port of the heat exchanger communicates with the liquid outlet of the liquid cooling cabinet; wherein, the liquid cooling system further includes a supplementary cooling device, the supplementary cooling device includes a collection and replenishment tank and a liquid replenishment power device, each liquid cooling cabinet is selectively communicated with the collection and replenishment tank, and the liquid replenishment power device is connected between the liquid replenishment port of the collection and replenishment tank and the receiving port of the heat exchanger to realize the liquid circulation between the liquid to be cooled in the collection and replenishment tank and the cooled liquid of the heat exchanger.

[0007] Optionally, a drain port is formed on the liquid-cooled cabinet, and the drain port is arranged at the maximum liquid level height of the liquid to be cooled allowed by the liquid-cooled cabinet; a collection port is formed on the collection and replenishment tank, and the collection port is lower than the drain port; the supplementary cooling device further includes a plurality of drain branch pipes, the drain branch pipes correspond to the liquid-cooled cabinets one by one, the drain branch pipe includes a drain valve, and the drain valve is arranged on the drain branch pipe; the drain port of the liquid-cooled cabinet and the collection port of the collection and replenishment tank are selectively communicated by controlling the drain valve.

[0008] Optionally, the supplementary cooling device further includes a drain main pipe and a plurality of connection ports, the plurality of connection ports are arranged on the drain main pipe and correspond to the plurality of drain branch pipes one by one, the drain port of the liquid-cooled cabinet and the connection port are selectively communicated by controlling the drain valve, and the connection port communicates with the collection port of the collection and replenishment tank.

[0009] Optionally, the plurality of drain branch pipes have the same length, and the heights of the drain main pipe at the plurality of connection ports are all different.

[0010] Optionally, a replenishment port is further arranged on the collection and replenishment tank, the supplementary cooling device further includes a replenishment pipeline, the replenishment pipeline communicates the replenishment port of the collection and replenishment tank and the receiving port of the heat exchanger, the replenishment power device is arranged on the replenishment pipeline, the replenishment power device includes a replenishment pump and a replenishment valve, and the replenishment valve is arranged between the replenishment pump and the heat exchanger.

[0011] As a second aspect of the present invention, a control method for a liquid cooling system is provided, wherein the liquid cooling system is the liquid cooling system provided in the first aspect of the present invention, and the control method includes:

[0012] Obtain the liquid level height of the cabinet coolant in the liquid-cooled cabinet;

[0013] When the liquid level height of the cabinet coolant is greater than the warning height, control the drain valve so that the liquid-cooled cabinet communicates with the collection and replenishment tank; wherein, the warning height is the maximum liquid level height allowed by the liquid-cooled cabinet;

[0014] Obtain the liquid level height of the collection and replenishment coolant in the collection and replenishment tank;

[0015] When the liquid level height of the collection and replenishment coolant is greater than or equal to the replenishment height, perform a replenishment operation; wherein, the replenishment height is between the collection port and the replenishment port of the collection and replenishment tank.

[0016] Optionally, a replenishment pump and a replenishment valve are arranged between the collection and replenishment tank and the heat exchanger; when the liquid level height of the collection and replenishment coolant is greater than or equal to the replenishment height, performing a replenishment operation includes:

[0017] Control the liquid supplement pump and the liquid supplement valve so that the liquid collection and supplement tank communicates with the heat exchanger;

[0018] Control the liquid supplement pump and the liquid supplement valve according to the liquid level height of the collected and supplemented coolant and the height of the liquid supplement port of the liquid collection and supplement tank, so that the liquid collection and supplement tank communicates with or is separated from the heat exchanger.

[0019] Optionally, the controlling the liquid supplement pump and the liquid supplement valve according to the liquid level height of the collected and supplemented coolant and the height of the liquid supplement port of the liquid collection and supplement tank, so that the liquid collection and supplement tank communicates with or is separated from the heat exchanger, includes:

[0020] When the liquid level height of the collected and supplemented coolant is greater than or equal to the height of the liquid supplement port of the liquid collection and supplement tank, control the liquid supplement pump and the liquid supplement valve so that the liquid collection and supplement tank communicates with the heat exchanger;

[0021] When the liquid level height of the collected and supplemented coolant is less than the height of the liquid supplement port of the liquid collection and supplement tank, control the liquid supplement pump and the liquid supplement valve so that the liquid collection and supplement tank is separated from the heat exchanger.

[0022] Optionally, the control method further includes:

[0023] When the liquid level height of the coolant in the cabinet is less than or equal to the warning height, control the drain valve so that the liquid-cooled cabinet is separated from the liquid collection and supplement tank.

[0024] As a third aspect of the present invention, there is provided a controller, which includes:

[0025] One or more processors;

[0026] A memory storing one or more computer programs, which when executed by the one or more processors, cause the one or more processors to implement the control method provided in the second aspect of the present invention.

[0027] The liquid cooling system provided by the present invention proposes a device that maintains the heat dissipation function and can automatically replenish liquid on the basis of retaining the conventional heat dissipation device. A supplementary cooling device is arranged between multiple liquid cooling cabinets and the heat exchanger. The device includes a collection and replenishment tank and a liquid replenishment power device. The collection and replenishment tank communicates with multiple liquid cooling cabinets through corresponding liquid discharge pipelines. Since the liquid discharge port of the liquid cooling cabinet is higher than the collection port of the collection and replenishment tank, the gravity generated by the height difference can discharge the liquid to be cooled in the liquid cooling cabinet into the collection and replenishment tank for collection. A liquid discharge valve is arranged on the liquid discharge pipeline corresponding to each liquid cooling cabinet, which can simultaneously collect the overflow liquid in multiple liquid cooling cabinets. Whether a single liquid cooling cabinet or multiple liquid cooling cabinets have overflow situations, the cooling liquid can be effectively collected. In addition, a liquid replenishment port is arranged on the collection and replenishment tank, and the liquid replenishment power device connects the liquid replenishment port of the collection and replenishment tank with the heat exchanger. When liquid replenishment is required, the liquid replenishment valve and liquid replenishment pump in the liquid replenishment power device are controlled to pump the liquid to be cooled in the collection and replenishment tank to the heat exchanger, realizing the recycling of the coolant.

[0028] The control method applicable to the above liquid cooling system provided by the present invention detects whether there is an overflow risk by obtaining the liquid level height of the liquid cooling cabinet and automatically judging whether the liquid level height of the liquid to be cooled in the liquid cooling cabinet exceeds the warning height. When there is an overflow risk, the liquid discharge valve is controlled to discharge the liquid to be cooled in the liquid cooling cabinet into the collection and replenishment tank. At the same time, the liquid level height in the collection and replenishment tank is monitored. When the liquid level height reaches the liquid replenishment height, the liquid replenishment pump and liquid replenishment valve are controlled to pump the liquid to be cooled into the heat exchanger, and the heat exchanger replenishes the liquid cooling cabinet to realize liquid circulation.

[0029] For the liquid cooling system and its control method provided by the present invention, the main circulation pump is responsible for the cold liquid transportation under normal conditions. When it is detected that the circulation pump fails, or the coolant in the liquid cooling cabinet overflows or is lacking, etc., the liquid replenishment pump is automatically started to ensure that the coolant circulates in time between the liquid cooling cabinet and the heat exchanger, maintaining the heat dissipation function of the system. In addition, when it is detected that the coolant liquid level is insufficient, the collection and replenishment tank is automatically controlled to replenish the coolant to the heat exchanger to ensure the normal operation of the system. This dual-pump configuration and the function of the collection and replenishment tank to collect and replenish liquid, combined with the control method, can monitor the working conditions of the liquid cooling system in real time, effectively maintain the system heat dissipation, and realize automatic liquid replenishment. This design significantly improves the reliability, automation degree and operation efficiency of the liquid cooling system, reduces the system shutdown risk caused by coolant overflow, lack of liquid or circulation pump failure, and is applicable to various application scenarios with high heat dissipation requirements.

[0030] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and the accompanying drawings. The best embodiments or means of the present invention will be shown in detail in combination with the accompanying drawings, but it is not a limitation on the technical solution of the present invention. In addition, these features, elements, and components that appear in each of the following texts and drawings are multiple, and different symbols or numbers are marked for convenience of representation, but they all represent components with the same or similar structures or functions. Description of the Drawings

[0031] The present invention will be further described below in conjunction with the accompanying drawings:

[0032] Figure 1 is a three-dimensional structural schematic diagram of a liquid cooling system provided by the present invention;

[0033] Figure 2 is a planar structural schematic diagram of a liquid cooling system provided by the present invention;

[0034] Figure 3 is a flowchart of a control method provided by the present invention;

[0035] Figure 4 is a flowchart of an implementation manner of step S140 of a control method provided by the present invention;

[0036] Figure 5 is a flowchart of an implementation manner of step S142 of a control method provided by the present invention;

[0037] Figure 6 is a flowchart of another implementation manner of a control method provided by the present invention;

[0038] Figure 7 is a schematic diagram of a controller module provided by the present invention.

[0039] Description of the Reference Numerals

[0040] Among them, 100, heat exchanger; 101, output port; 102, receiving port; 200, circulation pump; 300, liquid cooling cabinet; 301, liquid inlet; 302, liquid outlet; 303, drain port; 400, supplementary cooling device; 401, collection and replenishment tank; 4011, collection port; 4012, replenishment port; 402, replenishment power equipment; 4021, replenishment pump; 4022, replenishment valve; 403, drain branch pipe; 404, drain valve; 405, drain main pipe; 406, connection port; 407, replenishment pipeline; 500, liquid inlet valve; 600, processor; 700, memory; 800, I / O interface; 900, bus. Detailed Embodiments

[0041] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the implementation manners, it is intended to explain the present invention and should not be construed as a limitation of the present invention.

[0042] As used herein, the phrase "an embodiment", "an example" or "an instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present disclosure. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0043] Currently, the liquid cooling system uses a circulation pump to achieve liquid circulation between the liquid cooling cabinet and the heat exchanger to achieve the heat dissipation function. This solution severely relies on the function of the circulation pump. When the circulation pump fails, manual maintenance takes a long time. Due to the failure of the power equipment, the liquid to be cooled in the liquid cooling cabinet cannot be discharged in time. While the heat dissipation function fails, the coolant in the liquid cooling cabinet accumulates too much, which is likely to cause liquid overflow, further leading to problems such as equipment damage, system shutdown, and safety hazards.

[0044] In view of this, as Figure 1-2 shown in the embodiment, a first aspect of the present invention provides a liquid cooling system. The liquid cooling system includes a heat exchanger 100, a circulation pump 200, and a plurality of liquid cooling cabinets 300. The circulation pump 200 is disposed between the liquid cooling cabinet 300 and the heat exchanger 100. The circulation pump 200 is used to pump the liquid to be cooled in each liquid cooling cabinet 300 to the heat exchanger 100. The output port 101 of the heat exchanger 100 communicates with the liquid inlet port 301 of the liquid cooling cabinet 300, and the receiving port 102 of the heat exchanger 100 communicates with the liquid outlet port 302 of the liquid cooling cabinet 300. Wherein, the liquid cooling system further includes a supplementary cooling device 400. The supplementary cooling device 400 includes a collection and replenishment tank 401 and a replenishment power device 402. Each liquid cooling cabinet 300 is selectively connected to the collection and replenishment tank 401. The replenishment power device 402 is connected between the replenishment port 4012 of the collection and replenishment tank 401 and the receiving port 102 of the heat exchanger 100 to realize the liquid circulation between the liquid to be cooled in the collection and replenishment tank 401 and the cooled liquid in the heat exchanger 100.

[0045] The liquid cooling system provided in this embodiment includes three coolant circulation lines. Circulation line 1: When only the circulation pump 200 is working, the coolant output from the outlet 101 of the heat exchanger 100 is delivered to the liquid cooling cabinet 300 through the inlet valve 500. The coolant in the liquid cooling cabinet 300 directly contacts the device to be cooled (such as a server), absorbs the heat generated by the device to be cooled, and then is discharged from the outlet 302. The coolant to be cooled is then delivered to the receiving port 102 of the heat exchanger 100 through the circulation pump 200, completing the heat dissipation cycle. Circulation line 2: When the circulation pump 200 fails, the coolant output from the outlet 101 of the heat exchanger 100 is delivered to the liquid cooling cabinet 300 through the inlet valve 500. The coolant in the liquid cooling cabinet 300 directly contacts the device to be cooled (such as a server), absorbs the heat generated by the device to be cooled, and then is discharged from the drain port 303. The collection and replenishment tank 401 collects the liquid to be cooled at the collection port 4011, and under the action of the replenishment pump 4021 and the replenishment valve 4022, the liquid to be cooled is delivered from the replenishment port 4012 to the receiving port 102 of the heat exchanger 100, completing the heat dissipation cycle. Circulation line 3: When the circulation pump 200 and the replenishment pump 4021 work simultaneously, the coolant output from the outlet 101 of the heat exchanger 100 is delivered to the liquid cooling cabinet 300 through the inlet valve 500. The coolant in the liquid cooling cabinet 300 directly contacts the device to be cooled (such as a server), absorbs the heat generated by the device to be cooled, and is discharged from the outlet 302 and at the same time is discharged from the drain port 303 of the liquid cooling cabinet 300; the coolant to be cooled discharged from the outlet 302 is delivered to the receiving port 102 of the heat exchanger 100 through the circulation pump 200, and the coolant to be cooled discharged from the drain port 303 is delivered to the receiving port 102 of the heat exchanger 100 under the combined action of the collection and replenishment tank 401, the replenishment pump 4021, and the replenishment valve.

[0046] The liquid cooling system provided by the present invention proposes a device that maintains the heat dissipation function and can automatically replenish liquid on the basis of retaining the conventional heat dissipation device. A supplementary cooling device 400 is provided between multiple liquid cooling cabinets 300 and a heat exchanger 100. The device includes a liquid collection and replenishment tank 401 and a liquid replenishment power device 402. The liquid collection and replenishment tank 401 communicates with multiple liquid cooling cabinets 300 through corresponding liquid discharge pipes. Since the liquid discharge port 303 of the liquid cooling cabinet 300 is higher than the collection port 4011 of the liquid collection and replenishment tank 401, the gravity generated by the height difference can discharge the liquid to be cooled in the liquid cooling cabinet 300 into the liquid collection and replenishment tank 401 for collection. A liquid discharge valve is provided on the liquid discharge pipe corresponding to each liquid cooling cabinet 300, which can simultaneously collect the overflow liquid in multiple liquid cooling cabinets 300. Whether it is a single liquid cooling cabinet 300 or multiple liquid cooling cabinets 300 with overflow, the cooling liquid can be effectively collected. In addition, a liquid replenishment port 4012 is provided on the liquid collection and replenishment tank 401. The liquid replenishment power device 402 connects the liquid replenishment port 4012 of the liquid collection and replenishment tank 401 to the heat exchanger 100. When liquid replenishment is required, the liquid replenishment valve and the liquid replenishment pump 4021 in the liquid replenishment power device 402 are controlled to pump the liquid to be cooled in the liquid collection and replenishment tank 401 to the heat exchanger 100, realizing the recycling of the cooling liquid.

[0047] In this embodiment, in order to better transfer the liquid to be cooled discharged from the liquid discharge port 303 of the liquid cooling cabinet 300 to the liquid collection and replenishment tank 401, as an alternative embodiment, a liquid discharge port 303 is formed on the liquid cooling cabinet 300, and the liquid discharge port 303 is set at the maximum liquid level height of the liquid to be cooled allowed in the liquid cooling cabinet 300; a collection port 4011 is formed on the liquid collection and replenishment tank 401, and the collection port 4011 is lower than the liquid discharge port 303; the supplementary cooling device 400 further includes multiple liquid discharge branch pipes 403, and the liquid discharge branch pipes 403 correspond to the liquid cooling cabinets 300 one by one. The liquid discharge branch pipe 403 includes a liquid discharge valve 404, and the liquid discharge valve 404 is provided on the liquid discharge branch pipe 403; the liquid discharge port 303 of the liquid cooling cabinet 300 and the collection port 4011 of the liquid collection and replenishment tank 401 are selectively connected by controlling the liquid discharge valve 404.

[0048] In the case where the liquid to be cooled in the liquid cooling cabinet 300 exceeds the maximum liquid level height, the liquid discharge action starts. By using the gravity generated by the height difference between the collection port 4011 and the liquid discharge port 303, without adjusting the opening degree of the liquid discharge valve 404 or controlling the flow rate of the liquid to be cooled, only by controlling the liquid discharge valve 404 to be in a fully open state can the liquid discharge be realized.

[0049] Since the liquid cooling system includes multiple liquid cooling cabinets 300, draining operations for single or multiple liquid cooling cabinets 300 can be realized. As an alternative implementation, the supplementary cooling device 400 further includes a main drain pipe 405 and multiple connection ports 406. The multiple connection ports 406 are arranged on the main drain pipe 405 and correspond one-to-one to the multiple drain branch pipes 403. The drain ports 303 of the liquid cooling cabinets 300 and the connection ports 406 are selectively connected through control drain valves 404, and the connection ports 406 communicate with the collection port 4011 of the collection and replenishment tank 401.

[0050] It should be specifically noted that during the above draining process, the gravity generated by the height difference can directly drain the liquid to be cooled discharged from the drain port 303 into the collection and replenishment tank 401. In order to reduce the hysteresis of electric regulation during the draining process and reduce the pressure loss of each drain branch pipe 403, as an alternative implementation, multiple drain branch pipes 403 have the same length, and the heights of the main drain pipe 405 at the multiple connection ports 406 are all different.

[0051] This design method with equal-length drain branch pipes 403 can reduce the pressure loss gap between each branch and keep the liquid levels of each liquid cooling cabinet 300 balanced for a period of time. The design with different heights of the main drain pipe 405 at different connection ports 406 makes the main drain pipe 405 present a certain slope in the whole system. This slope design of the main drain pipe 405 can also utilize the action of gravity to fully drain the liquid to be cooled into the collection and replenishment tank 401, reducing the regulation difficulty.

[0052] Through the above description, the function of the collection and replenishment tank 401 to collect the liquid to be cooled in the liquid cooling cabinet 300 is realized. In addition, for another function of the collection and replenishment tank 401, an implementation method of replenishing the liquid to be cooled into the heat exchanger 100 is that the collection and replenishment tank 401 is further provided with a replenishment port 4012, the supplementary cooling device 400 further includes a replenishment pipeline 407, the replenishment pipeline 407 communicates with the replenishment port 4012 of the collection and replenishment tank 401 and the receiving port 102 of the heat exchanger 100, and a replenishment power device 402 is arranged on the replenishment pipeline 407. The replenishment power device 402 includes a replenishment pump 4021 and a replenishment valve 4022, and the replenishment valve 4022 is arranged between the replenishment pump 4021 and the heat exchanger 100.

[0053] When the collection and replenishment tank 401 needs to perform a replenishment operation, the replenishment pump 4021 and the replenishment valve 4022 can pump the liquid to be cooled in the collection and replenishment tank 401 into the heat exchanger 100, thereby realizing the liquid circulation among the three devices of the liquid cooling cabinet 300, the collection and replenishment tank 401, and the heat exchanger 100.

[0054] The liquid drainage and replenishment functions of the liquid collection and compensation tank 401 enable the liquid to be cooled to circulate not only between the liquid-cooled cabinet 300 and the heat exchanger 100, but also between the liquid-cooled cabinet 300, the liquid collection and compensation tank 401 and the heat exchanger 100.

[0055] As a second aspect of the present invention, a control method for a liquid cooling system is provided, as Figure 3 shown, wherein the liquid cooling system is the liquid cooling system provided in the first aspect of the present invention, and the control method includes:

[0056] In step S110, obtain the liquid level height of the cabinet cooling liquid in the liquid-cooled cabinet;

[0057] In step S120, when the liquid level height of the cabinet cooling liquid is greater than the warning height, control the drain valve to communicate the liquid-cooled cabinet with the liquid collection and compensation tank; wherein the warning height is the maximum liquid level height allowed for the liquid-cooled cabinet;

[0058] In step S130, obtain the liquid level height of the liquid collection and compensation coolant in the liquid collection and compensation tank;

[0059] In step S140, when the liquid level height of the liquid collection and compensation coolant is greater than or equal to the replenishment height, perform a replenishment operation; wherein the replenishment height is between the collection port and the replenishment port of the liquid collection and compensation tank.

[0060] The control method for the liquid cooling system provided by the present invention detects whether there is an overflow risk by obtaining the liquid level height of the liquid-cooled cabinet and automatically determining whether the liquid level height of the liquid to be cooled in the liquid-cooled cabinet exceeds the warning height. When there is an overflow risk, control the drain valve to discharge the liquid to be cooled in the liquid-cooled cabinet into the liquid collection and compensation tank. At the same time, monitor the liquid level height in the liquid collection and compensation tank. When the liquid level height reaches the replenishment height, control the replenishment pump and the replenishment valve to pump the liquid to be cooled into the heat exchanger, and replenish the liquid-cooled cabinet through the heat exchanger to realize liquid circulation.

[0061] It should be noted in detail that for the replenishment operation, as Figure 4 shown in the optional embodiment, a replenishment pump and a replenishment valve are provided between the liquid collection and compensation tank and the heat exchanger; the step of performing a replenishment operation when the liquid level height of the liquid collection and compensation coolant is greater than or equal to the replenishment height includes:

[0062] In step S141, control the replenishment pump and the replenishment valve to communicate the liquid collection and compensation tank with the heat exchanger;

[0063] In step S142, control the replenishment pump and the replenishment valve according to the liquid level height of the liquid collection and compensation coolant and the height of the replenishment port of the liquid collection and compensation tank to communicate or disconnect the liquid collection and compensation tank from the heat exchanger.

[0064] It should be noted that steps S141 and S142 are executed sequentially in order. Regarding when the liquid collection and replenishment tank and the heat exchanger remain in a communicating state and when they are switched to a partitioned state while in a communicating state, as Figure 5 shown, as an alternative implementation, controlling the replenishment pump and the replenishment valve according to the liquid level height of the collected and replenished coolant and the height of the replenishment port of the liquid collection and replenishment tank to make the liquid collection and replenishment tank communicate with or be partitioned from the heat exchanger includes:

[0065] In step S142a, when the liquid level height of the collected and replenished coolant is greater than or equal to the height of the replenishment port of the liquid collection and replenishment tank, control the replenishment pump and the replenishment valve to make the liquid collection and replenishment tank communicate with the heat exchanger;

[0066] In step S142b, when the liquid level height of the collected and replenished coolant is less than the height of the replenishment port of the liquid collection and replenishment tank, control the replenishment pump and the replenishment valve to make the liquid collection and replenishment tank be partitioned from the heat exchanger.

[0067] Regarding the replenishment operation, it should be particularly noted that steps S142a and S142b are not executed sequentially. Appropriate steps need to be selected for execution according to the judgment result of the liquid level height of the collected and replenished coolant and the height of the replenishment port of the liquid collection and replenishment tank.

[0068] In addition to the detailed control of the replenishment operation, another implementation of the drainage operation of the above control method is as Figure 6 shown,

[0069] In step S110, obtain the liquid level height of the cabinet coolant in the liquid-cooled cabinet;

[0070] In step S120, when the liquid level height of the cabinet coolant is less than or equal to the warning height, control the drainage valve to make the liquid-cooled cabinet be partitioned from the liquid collection and replenishment tank.

[0071] As the third aspect of the present invention, a controller is provided, as Figure 7 shown, including:

[0072] One or more processors 600;

[0073] A memory 700, on which one or more computer programs are stored. When the one or more computer programs are executed by the one or more processors 600, the one or more processors 600 are caused to implement the control method provided by the second aspect of the present invention.

[0074] The controller may further include one or more I / O interfaces 800, connected between the processor 600 and the memory 700, configured to implement information interaction between the processor 600 and the memory 700.

[0075] Among them, the processor 600 is a device with data processing capabilities, including but not limited to a central processing unit 600 (CPU), etc.; the first memory 700 is a device with data storage capabilities, including but not limited to a random access memory 700 (RAM, more specifically such as SDRAM, DDR, etc.), a read-only memory 700 (ROM), an electrically erasable programmable read-only memory 700 (EEPROM), and a flash memory (FLASH); the I / O interface 800 (read / write interface) is connected between the processor 600 and the memory 700, and can realize the information interaction between the processor 600 and the memory 700, including but not limited to a data bus 900 (Bus), etc.

[0076] In some embodiments, the processor, the memory 700, and the I / O interface 800 are interconnected through the bus 900, and then connected to other components of the computing device.

[0077] For the liquid cooling system and its control method provided by the present invention, the main circulation pump is responsible for the cold liquid transportation under normal conditions. When it is detected that the circulation pump fails or the coolant in the liquid cooling cabinet overflows or is lacking, etc., the make-up pump is automatically started to ensure the timely circulation of the coolant between the liquid cooling cabinet and the heat exchanger, and maintain the heat dissipation function of the system. In addition, when it is detected that the coolant level is insufficient, the make-up tank is automatically controlled to supplement the coolant to the heat exchanger to ensure the normal operation of the system. This dual-pump configuration and the make-up function of the make-up tank, combined with the control method, can monitor the working conditions of the liquid cooling system in real time, effectively maintain the system heat dissipation, and achieve automatic make-up. This design significantly improves the reliability, automation level, and operating efficiency of the liquid cooling system, reduces the risk of system shutdown caused by coolant overflow, lack of liquid, or circulation pump failure, and is applicable to various application scenarios with high heat dissipation requirements.

[0078] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A liquid cooling system, comprising a heat exchanger (100), a circulation pump (200), and a plurality of liquid cooling cabinets (300), wherein the circulation pump (200) is arranged between the liquid cooling cabinet (300) and the heat exchanger (100), and the circulation pump (200) is used to pump the liquid to be cooled in each of the liquid cooling cabinets (300) into the heat exchanger (100); the output port (101) of the heat exchanger (100) is communicated with the liquid inlet (301) of the liquid cooling cabinet (300), and the receiving port (102) of the heat exchanger (100) is communicated with the liquid outlet (302) of the liquid cooling cabinet (300); It is characterized in that The liquid cooling system further comprises a supplementary cooling device (400), wherein the supplementary cooling device (400) comprises a collecting tank (401) and a liquid replenishing power device (402), each of the liquid cooling cabinets (300) is selectively connected to the collecting tank (401), and the liquid replenishing power device (402) is connected between a liquid replenishing port (4012) of the collecting tank (401) and a receiving port (102) of the heat exchanger (100), so as to realize liquid circulation between the liquid to be cooled in the collecting tank (401) and the cooled liquid in the heat exchanger (100).

2. The liquid cooling system according to claim 1, characterized in that: The liquid cooling cabinet (300) is formed with a drain port (303), and the drain port (303) is arranged at the maximum liquid level height of the liquid to be cooled allowed by the liquid cooling cabinet (300); the collecting port (4011) is formed on the collecting tank (401), and the collecting port (4011) is lower than the drain port (303); the supplementary cooling device (400) further comprises a plurality of drain branch pipes (403), the drain branch pipes (403) correspond to the liquid cooling cabinet (300) one by one, the drain branch pipes (403) comprise drain valves (404), and the drain valves (404) are arranged on the drain branch pipes (403); the drain port (303) of the liquid cooling cabinet (300) and the collecting port (4011) of the collecting tank (401) are selectively connected by controlling the drain valves (404).

3. The liquid cooling system according to claim 2, characterized in that: The supplementary cooling device (400) further comprises a drainage main pipe (405) and a plurality of connection ports (406). The plurality of connection ports (406) are arranged on the drainage main pipe (405) and correspond one-to-one to the plurality of drainage branch pipes (403). The drainage port (303) of the liquid cooling cabinet (300) and the connection port (406) are selectively connected by controlling the drainage valve (404). The connection port (406) is connected to the collection port (4011) of the collecting tank (401).

4. The liquid cooling system according to claim 3, characterized in that: The plurality of drainage branch pipes (403) have the same length, and the heights of the drainage main pipe (405) at the plurality of connection ports (406) are all different.

5. The liquid cooling system according to any one of claims 1 to 4, characterized in that: The replenishment tank (401) is also provided with a replenishment port (4012), and the supplementary cooling device (400) further includes a replenishment pipeline (407), wherein the replenishment pipeline (407) is connected to the replenishment port (4012) of the replenishment tank (401) and the receiving port (102) of the heat exchanger (100), and the replenishment power device (402) is arranged on the replenishment pipeline (407), and the replenishment power device (402) includes a replenishment pump (4021) and a replenishment valve (4022), and the replenishment valve (4022) is arranged between the replenishment pump (4021) and the heat exchanger (100).

6. A control method for a liquid cooling system, characterized in that: The liquid cooling system is the liquid cooling system according to any one of claims 1 to 5, and the control method comprises: Get the height of the cabinet coolant level in the liquid cooling cabinet; When the cooling liquid level of the cabinet is greater than the warning height, the drain valve is controlled to connect the liquid-cooled cabinet with the collecting tank; wherein the warning height is the maximum liquid level height allowed by the liquid-cooled cabinet; Get the height of the coolant level in the coolant tank; In the case where the liquid level of the collecting and replenishing coolant is greater than or equal to the replenishing height, the replenishing operation is performed; wherein the replenishing height is located between the collecting port and the replenishing port of the collecting and replenishing tank.

7. The control method according to claim 6, characterized in that: A liquid replenishment pump and a liquid replenishment valve are provided between the collecting and replenishing tank and the heat exchanger; when the liquid level of the collecting and replenishing coolant is greater than or equal to the liquid replenishment height, the liquid replenishment operation is performed, including: Controlling the liquid replenishing pump and the liquid replenishing valve to make the replenishing tank and the heat exchanger communicate with each other; The replenishment pump and the replenishment valve are controlled according to the height of the replenishment coolant level and the height of the replenishment port of the replenishment tank, so that the replenishment tank and the heat exchanger are connected or isolated.

8. The control method according to claim 7, characterized in that: The method of controlling the replenishment pump and the replenishment valve according to the height of the replenishment coolant level and the height of the replenishment port of the replenishment tank so as to connect or disconnect the replenishment tank and the heat exchanger comprises: When the liquid level of the collecting and replenishing coolant is greater than or equal to the height of the replenishing port of the collecting and replenishing tank, the replenishing pump and the replenishing valve are controlled to make the collecting and replenishing tank and the heat exchanger communicate with each other; When the liquid level of the collecting and replenishing coolant is less than the height of the replenishing port of the collecting and replenishing tank, the replenishing pump and the replenishing valve are controlled to isolate the collecting and replenishing tank from the heat exchanger.

9. The control method according to claim 6, characterized in that: The control method further comprises: When the cabinet coolant level is less than or equal to the warning level, the drain valve is controlled to isolate the liquid-cooled cabinet from the collecting tank.

10. A controller, characterized in that: include: one or more processors (600); A memory (700) having one or more computer programs stored thereon, wherein when the one or more computer programs are executed by the one or more processors (600), the one or more processors (600) implement the control method according to any one of claims 6 to 9.

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