Multi-pump operation liquid cooling system and pump switching method

Abstract

The invention discloses a multi-pump operation liquid cooling system and a pump switching method, and the pump switching method comprises the steps: obtaining the real-time working information of each circulating pump, including the real-time gear information, the real-time operation duration, the real-time step frequency and the current cycle period count; determining a gear coefficient based on the real-time gear information, and obtaining a step correction coefficient; on the basis of the gear coefficient, the real-time operation duration, the step correction coefficient and the real-time step frequency, the accumulated loss value of each circulating pump is determined; an accumulated threshold value is obtained, the accumulated loss value of each circulating pump is compared with a preset accumulated threshold value, and a circulating pump switching instruction is generated according to a comparison result; according to the pump switching method, the operation parameters of the circulating pump are monitored in real time to calculate the accumulated loss value, the service life loss can be accurately evaluated, the service life balance of the pump set is achieved, the service life asymmetry caused by timing switching is avoided, the overall service life is prolonged, the switching of the circulating pump better fits the actual operation condition, and the adaptability and efficiency of the liquid cooling system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling system control, and in particular to a multi-pump operation liquid cooling system and a pump switching method. Background Art

[0002] Liquid cooling systems are one of the key technologies for temperature control in data centers, and circulation pumps, which are used to ensure the continuous flow of liquid media, play a vital role. In liquid cooling systems, the circulation pumps can be single, dual, triple, or multi-pump configurations. In multi-pump configurations, a backup pump is usually set up to ensure that the liquid cooling system can still maintain sufficient cooling capacity in the event of a failure of the main circulation pump, thereby avoiding a decrease in cooling performance.

[0003] To ensure the overall lifespan and reliability of the data center system, the backup and primary circulation pumps need to be rotated regularly. However, traditional circulation pump rotation strategies typically rely on a timed rotation mechanism, which has several problems:

[0004] First, the timed rotation strategy does not fully consider the state differences of the circulation pump in actual operation. These state differences have a significant impact on the life and reliability of the pump. If the rotation is simply performed at fixed time intervals, it may lead to asymmetry in the life and reliability of the circulation pump.

[0005] Secondly, the timing rotation strategy does not take into account the step effect of the circulation pump during the transition between different states; the step process has a significant impact on the life and reliability of the circulation pump, and the timing rotation strategy fails to fully consider the impact of these state transitions on performance.

[0006] Finally, the timed rotation strategy also has shortcomings in considering the performance reliability during the system switching process; the timed switching of the circulation pump may cause unnecessary fluctuations in system performance and affect the stable operation of the data center.

[0007] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the Invention

[0008] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a pump switching method that can avoid the life asymmetry problem caused by timed switching, extend the overall service life of the pump group, and make the circulation pump switching more in line with the actual operating conditions, thereby improving the adaptability and efficiency of the liquid cooling system.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A pump switching method is applicable to a liquid cooling system including a plurality of circulation pumps electrically connected to a control device, the pump switching method comprising the steps of: obtaining real-time operating information of each circulation pump, the real-time operating information including real-time gear information, real-time operating time, real-time step number and current cycle period count; confirming a gear coefficient based on the real-time gear information and obtaining a step correction coefficient; confirming a cumulative loss value of each circulation pump based on the gear coefficient, real-time operating time, step correction coefficient and real-time step number; obtaining a preset cumulative threshold value, and comparing the cumulative loss value of each circulation pump with the preset cumulative threshold value; and generating a circulation pump switching instruction when any cumulative loss value is ≥ the preset cumulative threshold value.

[0011] In the pump switching method, when any cumulative loss value is ≥ a preset cumulative threshold, a circulation pump switching instruction is generated, specifically including: when any cumulative loss value is ≥ a preset cumulative threshold, comparing the current cycle counts of each circulation pump; confirming the switching in and switching out of the circulation pump based on the comparison result, and generating a circulation pump switching instruction.

[0012] In the pump switching method, the confirmation of cutting in the circulation pump and cutting out the circulation pump based on the comparison result and the generation of the circulation pump switching instruction specifically include: taking the circulation pump with the smallest current cycle count as the cutting in circulation pump, and taking the circulation pump with the largest current cycle count as the cutting out circulation pump; obtaining the real-time gear information of the cutting out circulation pump, the real-time gear information being the low load gear, the medium load gear or the high load gear; and generating the circulation pump switching instruction based on the real-time gear information of the cutting out circulation pump.

[0013] In the pump switching method, the circulation pump switching instruction is generated based on the real-time gear information of the cut-out circulation pump, specifically including: when the real-time gear information of the cut-out circulation pump is the high-load gear, the real-time gear of the cut-out circulation pump is adjusted to the medium-load gear, and then the cut-out circulation pump is turned off, and then the cut-in circulation pump is started; when the real-time gear information of the cut-out circulation pump is the medium-load gear or the low-load gear, the cut-out circulation pump is turned off and the cut-in circulation pump is started.

[0014] In the pump switching method, the cumulative loss value of each circulation pump is confirmed based on the gear coefficient, real-time operating time, step correction coefficient and real-time step number, specifically including: calculating the operating load value based on the gear coefficient and real-time operating time; calculating the step impact value based on the step correction coefficient and real-time step number; and confirming the cumulative loss value of each circulation pump based on the operating load value and the step impact value.

[0015] The present invention also provides a multi-pump liquid cooling system accordingly, which adopts any of the pump switching methods described above to achieve work control; the multi-pump liquid cooling system includes a control device and a heat exchange mechanism and a circulation mechanism electrically connected to the control device respectively, the heat exchange mechanism is used to achieve cooling of the refrigerant, and the circulation mechanism is used to transport the refrigerant after heat exchange to the user end.

[0016] In the multi-pump liquid cooling system, the heat exchange mechanism includes a heat exchanger and a fan respectively electrically connected to the control device, the circulation mechanism includes a first circulation pump, a second circulation pump and a third circulation pump respectively electrically connected to the control device, the fan is arranged on one side of the heat exchanger, the input end of the heat exchanger is used to connect to the user end, the output end of the heat exchanger is connected to the input end of the first circulation pump, the input end of the second circulation pump or the input end of the third circulation pump through the main circulation pipeline, and the output end of the first circulation pump, the output end of the second circulation pump or the output end of the third circulation pump is used to connect to the user load.

[0017] The multi-pump liquid cooling system further includes a fluid replenishment mechanism electrically connected to the control device, the fluid replenishment mechanism is used to replenish the main circulation pipeline, and the output end of the fluid replenishment mechanism is connected to the main circulation pipeline.

[0018] The multi-pump liquid cooling system further includes a working detection mechanism electrically connected to the control device, and the working detection mechanism is used to obtain real-time system pressure, real-time refrigerant temperature and real-time ambient temperature and humidity.

[0019] The multi-pump liquid cooling system further includes an automatic exhaust valve, an expansion tank, and a drain valve electrically connected to the control device. The automatic exhaust valve is connected to the input end of the heat exchanger, and the expansion tank and the drain valve are arranged on the main circulation pipeline, and the expansion tank and the drain valve are respectively located between the heat exchanger and the circulation mechanism.

[0020] Beneficial effects:

[0021] The present invention provides a pump switching method, which monitors the operating status gear, single operating time, number of state steps and other parameters of each circulating pump in real time, and calculates the cumulative loss value in combination with the gear coefficient and the step correction coefficient to accurately evaluate the life loss of each circulating pump, achieve balanced life loss of the pump group, avoid the pump life asymmetry problem caused by traditional timed switching, extend the overall service life of the pump group, and make the switching of the circulating pump more in line with the actual operating conditions of the liquid cooling system, thereby improving the adaptability and operating efficiency of the liquid cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A logic flow chart of the pump switching method provided by the present invention;

[0023] Figure 2 This is a structural schematic diagram of the multi-pump liquid cooling system provided by the present invention.

[0024] Explanation of the main component symbols: 11-heat exchanger, 12-fan, 21-first circulation pump, 22-second circulation pump, 23-third circulation pump, 3-main circulation pipeline, 41-liquid storage tank, 42-liquid replenishing pump, 43-check valve, 51-first temperature sensor, 52-second temperature sensor, 53-first pressure sensor, 54-second pressure sensor, 55-third pressure sensor, 56-fourth pressure sensor, 57-temperature sensor, 61-automatic exhaust valve, 62-expansion tank, 63-drain valve. DETAILED DESCRIPTION

[0025] The present invention provides a multi-pump liquid cooling system and a pump switching method. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0026] In the description of the present invention, it should be understood that the terms "installation" and "connection" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1 The present invention provides a pump switching method, wherein the applicable liquid cooling system includes a plurality of circulation pumps electrically connected to a control device respectively, and the pump switching method comprises the steps of:

[0028] 101. Acquire real-time operating information of each circulating pump, wherein the real-time operating information includes real-time gear information, real-time operating time, real-time step number, and current cycle count;

[0029] In this embodiment, by real-time monitoring of the operating status of the circulation pump to replace the static logic of traditional timed switching, the liquid cooling system can make dynamic decisions based on the actual working intensity and loss of the circulation pump, avoiding excessive loss of high-load pumps and underutilization of low-load pumps due to fixed-time switching.

[0030] In this embodiment, the real-time step number reflects the switching frequency of the pump between different loads, and the step process has a significant impact on the mechanical life of the pump; obtaining the real-time step number corresponding to the circulating pump can quantify the loss of life due to state switching, providing key data for the subsequent calculation of the cumulative loss value.

[0031] 102. Confirm the gear coefficient based on the real-time gear information and obtain the step correction coefficient;

[0032] In this embodiment, real-time gear information includes: low-load gear, with a load between 0 and 30%, medium-load gear, with a load between 30% and 70%, and high-load gear, with a load between 70% and 100%. The gear coefficient range corresponding to the high-load gear is 40-50. Because it has a more significant impact on the mechanical loss of the pump, a higher coefficient needs to be set to prioritize switching. The gear coefficient range for the low-load gear is 30-40. Due to its relatively low loss, the coefficient setting is second. The gear coefficient range for the medium-load gear is 20-30. It serves as a transition stage, aiming to balance loss and efficiency. By configuring differentiated gear coefficients for each gear, the liquid cooling system can dynamically adjust the operating time threshold of the circulation pump according to the load intensity, effectively preventing uneven lifespan caused by long-term operation of high-load pumps.

[0033] In this embodiment, the step correction coefficient ranges from 5 to 15; the step correction coefficient quantifies the impact of state switching on the circulation pump, avoids ignoring the additional loss caused by frequent switching of load gears, and improves the comprehensiveness of life assessment.

[0034] 103. Determine the cumulative loss value of each circulating pump based on the gear coefficient, real-time operating time, step correction coefficient and real-time step number;

[0035] 104. Obtain a preset cumulative threshold value, and compare the cumulative loss value of each circulation pump with the preset cumulative threshold value;

[0036] In this embodiment, the preset cumulative threshold represents the equivalent operating value of the total life of the pump, and its value range is 1000-1150. When the cumulative loss value reaches the preset cumulative threshold, it indicates that the comprehensive loss of the circulating pump is close to the design life limit, and timely switching is required to avoid failure, thereby realizing on-demand switching rather than timed blind switching; by giving priority to switching circulating pumps with loss values ​​that meet the standards, it is ensured that the multi-pump group is always in a loss-balanced state, avoiding excessive use of any circulating pump, and extending the average service life of the entire pump group.

[0037] 105. When any cumulative loss value is greater than or equal to a preset cumulative threshold, a circulation pump switching instruction is generated.

[0038] The present application discloses a pump switching method, which monitors the operating status gear, single operating time, number of state steps and other parameters of each circulation pump in real time, and calculates the cumulative loss value in combination with the gear coefficient and the step correction coefficient to accurately evaluate the life loss of each circulation pump, so that the liquid cooling system can actively switch before the circulation pump approaches the end of its life, avoiding the interruption of cooling capacity due to sudden failure of the circulation pump, and improving the reliability of the liquid cooling system during operation; further, by giving priority to switching the circulation pumps with loss values ​​that meet the standards, the life loss of the pump group is balanced, avoiding the problem of pump life asymmetry caused by traditional timed switching, extending the overall service life of the pump group, and making the switching of the circulation pump more in line with the actual operating conditions of the liquid cooling system, thereby improving the adaptability and operating efficiency of the liquid cooling system.

[0039] In this embodiment, when any cumulative loss value is greater than or equal to a preset cumulative threshold, generating a circulating pump switching instruction specifically includes:

[0040] 201. When any cumulative loss value is ≥ a preset cumulative threshold, compare the current cycle counts of each circulation pump;

[0041] In this embodiment, the current cycle period is counted to the cumulative number of times the circulation pump is switched to the running state or switched out of the liquid cooling system.

[0042] 202. Confirm whether to switch on or off the circulation pump based on the comparison result, and generate a circulation pump switching instruction.

[0043] In this embodiment, a pump with a smaller cycle count means that its standby time is longer. Prioritizing the standby pump can avoid uneven aging of mechanical components caused by long-term idleness, while balancing the cycle of each pump and improving the overall reliability of the liquid cooling system. By comparing the current cycle counts of each circulation pump, the liquid cooling system can quickly lock the high-loss main circulation pump that needs to rest and the low-loss standby circulation pump that needs to be activated, reducing the switching decision time and improving response efficiency.

[0044] In this embodiment, the step of confirming whether to switch on or off the circulating pump based on the comparison result and generating a circulating pump switching instruction specifically includes:

[0045] 301. The circulation pump with the smallest current cycle count is selected as the cut-in circulation pump, and the circulation pump with the largest current cycle count is selected as the cut-out circulation pump;

[0046] 302. Acquire real-time gear position information of a switched-out circulating pump, where the real-time gear position information is a low-load gear, a medium-load gear, or a high-load gear;

[0047] 303. Generate a circulating pump switching instruction based on the real-time gear position information of the switched-out circulating pump;

[0048] In this embodiment, the real-time gear position of the cut-out circulation pump determines the switching strategy, that is, determines the content of the generated circulation pump switching instruction, thereby avoiding a sudden drop in liquid cooling system pressure or fluid shock caused by directly shutting down the cut-out circulation pump when it is in a high-load state, thereby improving the smoothness of the switching process.

[0049] In this embodiment, the generating of the circulating pump switching instruction based on the real-time gear position information of the switched-out circulating pump specifically includes:

[0050] 401. When the real-time gear information of the cut-out circulation pump is a high-load gear, the real-time gear of the cut-out circulation pump is adjusted to a medium-load gear, the cut-out circulation pump is turned off, and then the cut-in circulation pump is started;

[0051] In this embodiment, if the cut-out pump is in the high-load gear, it is first reduced to the medium-load gear and then turned off. Since directly turning off the circulation pump under high load may cause the pipeline pressure to drop suddenly, causing a water hammer effect or a sudden drop in the refrigerant flow of the heat exchanger, affecting the heat dissipation efficiency of the liquid cooling system, by reducing the load first and then turning off the cut-out circulation pump, the output power of the cut-out circulation pump can be gradually reduced, so that the fluid parameters of the liquid cooling system can be smoothly transitioned to avoid performance fluctuations.

[0052] 402. When the real-time gear information of the cut-out circulation pump is the medium load gear or the low load gear, the cut-out circulation pump is turned off and the cut-in circulation pump is started;

[0053] In this embodiment, the operating intensity of the circulation pump at medium or low load levels is low, and direct switching has little impact on the liquid cooling system; through direct switching, the switching time can be shortened to ensure the continuity of cooling supply.

[0054] In this embodiment, the cumulative loss value of each circulating pump is determined based on the gear coefficient, the real-time running time, the step correction coefficient and the real-time step number, specifically including:

[0055] 501. Calculate the operating load value based on the gear coefficient and the real-time operating time;

[0056] In this embodiment, the operating load value reflects the continuous loss of the circulation pump under a specific load. Long-term operation at a high load level will significantly increase the risks of bearing wear, motor heating, etc.

[0057] 502. Calculate a step impact value based on a step correction coefficient and a real-time step number;

[0058] In this embodiment, the step impact value reflects the instantaneous impact of state switching. For example, when the load changes from low to high, the sudden increase in the rotation speed of the circulation pump may cause a sudden change in mechanical stress.

[0059] 503. Confirm the cumulative loss value of each circulating pump based on the operating load value and the step impact value;

[0060] In this embodiment, the cumulative loss value = (gear coefficient × real-time operating time) + (step correction coefficient × real-time step number); combined with the operating load value and the step impact value, the actual life loss process of the circulation pump can be fully simulated, which is closer to the actual working conditions than traditional timed switching.

[0061] See also Figure 2 The present invention also provides a multi-pump liquid cooling system accordingly, which adopts any of the pump switching methods described above to achieve work control; the multi-pump liquid cooling system includes a control device and a heat exchange mechanism and a circulation mechanism electrically connected to the control device respectively, the heat exchange mechanism is used to achieve the cooling of the refrigerant, and the circulation mechanism is used to transport the refrigerant after heat exchange to the user end.

[0062] Further, see Figure 2 The heat exchange mechanism includes a heat exchanger and a fan electrically connected to the control device respectively. The circulation mechanism includes a first circulation pump, a second circulation pump and a third circulation pump electrically connected to the control device respectively. The fan is arranged on one side of the heat exchanger. The input end of the heat exchanger is used to connect to the user end. The output end of the heat exchanger is connected to the input end of the first circulation pump, the input end of the second circulation pump or the input end of the third circulation pump through the main circulation pipeline. The output end of the first circulation pump, the output end of the second circulation pump or the output end of the third circulation pump is used to connect to the user load.

[0063] In this embodiment, the heat exchanger is used to cool the refrigerant, and the fan accelerates air flow to enhance heat dissipation, which can quickly transfer the heat generated at the user end to the outside world, ensuring that the refrigerant temperature is maintained in a safe range.

[0064] In this embodiment, the circulation mechanism includes three circulation pumps, which can meet the needs of high-reliability scenarios such as data centers; the backup circulation pump is on standby in real time. When the main circulation pump stops due to loss value reaching the standard or failure, the cut-in circulation pump can be started immediately to ensure uninterrupted refrigerant circulation and avoid the risk of cooling interruption due to single pump failure.

[0065] Further, see Figure 2 The multi-pump liquid cooling system also includes a fluid replenishment mechanism electrically connected to the control device, the fluid replenishment mechanism is used to replenish the main circulation pipeline, and the output end of the fluid replenishment mechanism is connected to the main circulation pipeline.

[0066] In this embodiment, the rehydration mechanism includes a liquid storage tank, a liquid rehydration pump and a one-way valve. The liquid storage tank stores spare coolant, and the liquid rehydration pump replenishes liquid to the main circulation pipeline through the one-way valve to maintain the stability of the system liquid level; when the liquid level of the liquid cooling system drops due to evaporation, leakage, etc., the liquid rehydration pump automatically starts to replenish coolant to avoid mechanical damage to the circulation pump due to lack of liquid and idling; and the one-way valve can prevent the pipeline pressure from reversely impacting the liquid storage tank after rehydration, and cooperate with the expansion tank to maintain the system pressure balance and improve the circulation efficiency.

[0067] Further, see Figure 2 The multi-pump liquid cooling system also includes a working detection mechanism electrically connected to the control device, and the working detection mechanism is used to obtain real-time system pressure, real-time refrigerant temperature and real-time ambient temperature and humidity.

[0068] In this embodiment, the working detection mechanism includes a first temperature sensor, a second temperature sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a temperature and humidity sensor, which are electrically connected to the control device respectively; the two temperature sensors are used to feedback the heat exchange efficiency in real time, that is, to obtain the inlet and outlet temperature difference of the multi-pump liquid cooling system; the four pressure sensors are respectively used to detect whether there are blockages or leakage problems in the pipeline; the temperature and humidity sensors are used to assist in adjusting the system operation strategy; real-time working data is obtained by the working detection mechanism, so that the liquid cooling system can perform trend analysis based on the real-time working data, trigger early warning, and avoid the expansion of faults.

[0069] Further, see Figure 2 The multi-pump liquid cooling system also includes an automatic exhaust valve, an expansion tank, and a drain valve electrically connected to the control device. The automatic exhaust valve is connected to the input end of the heat exchanger. The expansion tank and the drain valve are arranged on the main circulation pipeline, and the expansion tank and the drain valve are respectively located between the heat exchanger and the circulation mechanism.

[0070] In this embodiment, the automatic exhaust valve is installed at the input end of the heat exchanger to remove air accumulated in the pipeline, prevent air blockage, ensure the refrigerant circulation effect, avoid the risk of local overheating caused by air blockage, and improve the heat dissipation efficiency; the expansion tank is used to buffer the volume changes caused by thermal expansion and contraction of the coolant, maintain the pressure stability of the liquid cooling system, avoid overpressure rupture or negative pressure flattening of the pipeline due to temperature changes, extend the life of the pipeline, and improve the safety of the liquid cooling system during operation; the drain valve is a controllable valve on the main circulation pipeline, which is used to drain the coolant during maintenance of the liquid cooling system.

[0071] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A pump switching method, characterized in that: The liquid cooling system includes a plurality of circulation pumps electrically connected to the control device respectively, and the pump switching method includes the steps of: Acquire real-time operating information of each circulating pump, including real-time gear information, real-time running time, real-time step number and current cycle count; Confirm the gear coefficient based on the real-time gear information and obtain the step correction coefficient; Determine the cumulative loss value of each circulation pump based on the gear coefficient, real-time operating time, step correction coefficient and real-time step number; Obtain a preset cumulative threshold value, and compare the cumulative loss value of each circulation pump with the preset cumulative threshold value; When any cumulative loss value is greater than or equal to the preset cumulative threshold, a circulation pump switching instruction is generated.

2. A pump switching method according to claim 1, characterized in that: When any cumulative loss value is greater than or equal to a preset cumulative threshold, generating a circulation pump switching instruction specifically includes: When any cumulative loss value is ≥ the preset cumulative threshold, the current cycle counts of each circulation pump are compared; Based on the comparison result, it is determined whether to switch the circulation pump in or out, and a circulation pump switching instruction is generated.

3. A pump switching method according to claim 2, characterized in that: The step of confirming the switching on and off of the circulation pump based on the comparison result and generating the circulation pump switching instruction specifically includes: The circulating pump with the smallest current cycle count is selected as the cut-in circulating pump, and the circulating pump with the largest current cycle count is selected as the cut-out circulating pump; Acquire real-time gear position information of a switched-out circulating pump, wherein the real-time gear position information is a low-load gear, a medium-load gear, or a high-load gear; A circulating pump switching instruction is generated based on the real-time gear position information of the switched-out circulating pump.

4. A pump switching method according to claim 3, characterized in that: The generating of the circulating pump switching instruction based on the real-time gear position information of the switched-out circulating pump specifically includes: When the real-time gear information of the cut-out circulation pump is the high-load gear, adjust the real-time gear of the cut-out circulation pump to the medium-load gear, turn off the cut-out circulation pump, and then start the cut-in circulation pump; When the real-time gear information of the cut-out circulation pump is the medium load gear or the low load gear, the cut-out circulation pump is turned off and the cut-in circulation pump is started.

5. A pump switching method according to claim 1, characterized in that: The cumulative loss value of each circulating pump is determined based on the gear coefficient, real-time running time, step correction coefficient and real-time step number, specifically including: Calculate the operating load value based on the gear coefficient and real-time operating time; Calculate the step impact value based on the step correction coefficient and the real-time step number; The accumulated loss value of each circulation pump is confirmed based on the operating load value and the step impact value.

6. A multi-pump liquid cooling system, which adopts the pump switching method described in any one of claims 1 to 5 to achieve work control; the multi-pump liquid cooling system includes a control device and a heat exchange mechanism and a circulation mechanism electrically connected to the control device respectively, the heat exchange mechanism is used to achieve cooling of the refrigerant, and the circulation mechanism is used to transport the refrigerant after heat exchange to the user end.

7. The multi-pump liquid cooling system according to claim 6, characterized in that: The heat exchange mechanism includes a heat exchanger and a fan electrically connected to the control device respectively. The circulation mechanism includes a first circulation pump, a second circulation pump and a third circulation pump electrically connected to the control device respectively. The fan is arranged on one side of the heat exchanger. The input end of the heat exchanger is used to connect to the user end. The output end of the heat exchanger is connected to the input end of the first circulation pump, the input end of the second circulation pump or the input end of the third circulation pump through the main circulation pipeline. The output end of the first circulation pump, the output end of the second circulation pump or the output end of the third circulation pump is used to connect to the user load.

8. The multi-pump liquid cooling system according to claim 7, characterized in that: It also includes a fluid replenishment mechanism electrically connected to the control device, the fluid replenishment mechanism is used to achieve fluid replenishment in the main circulation pipeline, and the output end of the fluid replenishment mechanism is connected to the main circulation pipeline.

9. The multi-pump liquid cooling system according to claim 6, characterized in that: It also includes a working detection mechanism electrically connected to the control device, and the working detection mechanism is used to obtain real-time system pressure, real-time refrigerant temperature and real-time ambient temperature and humidity.

10. The multi-pump liquid cooling system according to claim 7, characterized in that: It also includes an automatic exhaust valve, an expansion tank and a drain valve electrically connected to the control device, the automatic exhaust valve is connected to the input end of the heat exchanger, the expansion tank and the drain valve are arranged on the main circulation pipeline, and the expansion tank and the drain valve are respectively located between the heat exchanger and the circulation mechanism.

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