A cooling device

Abstract

The utility model discloses a cooling device belongs to refrigeration technical field. It includes: first liquid cooling pipeline, second liquid cooling pipeline, install mechanical safety valve, solenoid valve and be used for detecting liquid pressure first pressure sensor. When the measurement of first pressure sensor is greater than or equal to first preset value, namely, the pressure of second liquid cooling pipeline reaches the upper limit of system safety pressure, control solenoid valve opens, and the liquid in the leakage part of second liquid cooling pipeline is discharged to reduce the hydraulic pressure, and after the measurement of first pressure sensor is less than first preset value, solenoid valve is closed, thereby can accurate positioning system safety pressure upper limit value, and the aging risk is far lower than mechanical spring. In addition, when first pressure sensor or solenoid valve can not normally work, the pressure safety in second liquid cooling pipeline still can be guaranteed by mechanical safety valve, thereby improve the safety and reliability of cooling device.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a cooling device. Background Technology

[0002] With the rapid development of technologies such as cloud computing, artificial intelligence, and high-performance computing, the computing power demand of data centers is growing exponentially. The physical basis of computing power is chips, represented by CPUs and GPUs, and the computing power of a chip is positively correlated with its power consumption. Therefore, the power density of chips is constantly increasing, and the demand for efficient heat dissipation is also gradually increasing.

[0003] Traditional heat dissipation methods for heat-generating components such as chips rely on air cooling. However, due to limitations such as the low specific heat capacity of air and high fan energy consumption, this method struggles to meet the cooling demands of high-power computing devices and industry energy efficiency requirements. Against this backdrop, liquid cooling technology, with its advantages of high-efficiency heat dissipation and energy saving, is gradually becoming an important development direction in the field of data center cooling.

[0004] Liquid cooling technology allows a liquid medium to directly or indirectly contact heat-generating components, significantly improving the heat dissipation efficiency of these components by utilizing the high specific heat capacity and thermal conductivity of liquids. Simultaneously, liquid cooling technology can reduce the power usage effectiveness (PUE) of data centers to below 1.2, resulting in significant energy savings and reduced equipment noise and space occupation.

[0005] Currently, when cooling cold-plate liquid-cooled servers, mechanical safety valves are typically used to protect the cooling pipes from pressure. These valves contain a metal spring; as the liquid pressure inside the pipes increases, the spring compresses. When the liquid pressure reaches the valve's set range, the spring force opens the valve, allowing the liquid inside to flow into the system and releasing some liquid, thus reducing the pressure and restoring it to a safe level. However, due to the risk of spring aging after prolonged use, its accuracy may decrease. This can lead to situations where the mechanical safety valve fails to open and release pressure even when the liquid pressure reaches the preset range. Utility Model Content

[0006] The purpose of this invention is to provide a cooling device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0007] The technical solution adopted to solve the above-mentioned technical problems is as follows: A cooling device, comprising: a first liquid cooling pipeline, with its two ends respectively used to connect to the two ends of a cold source system; a second liquid cooling pipeline, with its two ends respectively used to connect to the two ends of a target cold plate, the second liquid cooling pipeline being equipped with a mechanical safety valve, a solenoid valve, and a first pressure sensor for detecting liquid pressure; when the hydraulic pressure in the second liquid cooling pipeline is higher than a preset range, the mechanical safety valve is opened under the action of the hydraulic pressure to release some liquid and reduce the hydraulic pressure of the second liquid cooling pipeline; when the measured value of the first pressure sensor is greater than or equal to a first preset value, the solenoid valve is controlled to open to release some liquid and reduce the hydraulic pressure of the second liquid cooling pipeline; when the measured value of the first pressure sensor is less than the first preset value, the solenoid valve is controlled to close; a heat exchanger, provided with a first heat exchange channel and a second heat exchange channel that can exchange heat with each other, the first heat exchange channel being connected to the first liquid cooling circuit, and the second liquid cooling circuit being connected to the second heat exchange channel.

[0008] This technical solution has at least the following beneficial effects: When the measured value of the first pressure sensor is greater than or equal to the first preset value, that is, when the pressure of the second liquid cooling pipeline reaches the upper limit of the system's safe pressure, the solenoid valve is opened to release some liquid from the second liquid cooling pipeline to reduce the hydraulic pressure. After the measured value of the first pressure sensor is lower than the first preset value, the solenoid valve is closed, thereby accurately positioning the upper limit of the system's safe pressure. The aging risk is far lower than that of mechanical springs. In addition, when the first pressure sensor or the solenoid valve fails to work properly, the pressure safety in the second liquid cooling pipeline can also be guaranteed by a mechanical safety valve, thereby improving the safety and reliability of the cooling device.

[0009] As a further improvement to the above technical solution, a water replenishment pipeline connected to the second liquid cooling pipeline is also included. The water replenishment pipeline is equipped with a liquid replenishment tank, a liquid replenishment pump, and an electric switch ball valve. By controlling the opening of the electric switch ball valve and the liquid replenishment pump, liquid in the liquid replenishment tank can be added to the second liquid cooling pipeline.

[0010] As a further improvement to the above technical solution, a water suction pipe extending to the bottom of the replenishment tank is inserted through the top of the replenishment tank, and the input end of the replenishment pump is connected to the top of the water suction pipe.

[0011] As a further improvement to the above technical solution, the bottom outer periphery of the water pumping pipe is provided with multiple holes.

[0012] As a further improvement to the above technical solution, an ultraviolet germicidal lamp is installed inside the replenishment tank.

[0013] As a further improvement to the above technical solution, the second liquid cooling pipeline is equipped with a second pressure sensor for detecting liquid pressure. When the measured value of the second pressure sensor is lower than the second preset pressure value, the electric switch ball valve and the replenishment pump are controlled to add liquid from the replenishment tank into the second liquid cooling pipeline.

[0014] As a further improvement to the above technical solution, the second liquid cooling pipeline is equipped with a main circulation pump for providing power, and the main circulation pump is a permanent magnet synchronous motor canned pump.

[0015] As a further improvement to the above technical solution, two heat exchangers are provided, and the two heat exchangers are connected in parallel.

[0016] As a further improvement to the above technical solution, the second liquid cooling pipeline is equipped with two main circulation pumps connected in parallel. The main circulation pumps are permanent magnet synchronous motor canned pumps. The two heat exchangers are installed side by side, and the two permanent magnet synchronous motor canned pumps are respectively installed at the upper position of the two heat exchangers.

[0017] As a further improvement to the above technical solution, an expansion tank for stabilizing hydraulic pressure is connected between the second liquid cooling pipeline and the solenoid valve. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram illustrating the principle of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram showing the positional distribution of the two heat exchangers and two main circulation pumps in an embodiment of this utility model;

[0021] Figure 3 This is a perspective structural diagram of the replenishment tank in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the specific structure of the refill tank in this embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the cabinet door structure in an embodiment of this utility model.

[0024] 100. First liquid cooling pipeline; 200. Second liquid cooling pipeline; 210. Mechanical safety valve; 220. Solenoid valve; 230. Main circulation pump; 300. Heat exchanger; 310. First heat exchange channel; 320. Second heat exchange channel; 400. Water replenishment pipeline; 410. Liquid replenishment tank; 411. Water extraction pipe; 412. Hole; 413. Ultraviolet germicidal lamp; 420. Liquid replenishment pump; 430. Electric ball valve; 500. Expansion tank; 600. Cabinet door. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Reference Figure 1-5 The cooling device includes a first liquid cooling pipe 100, a second liquid cooling pipe 200, and a heat exchanger 300. The two ends of the first liquid cooling pipe 100 are connected to the two ends of a cold source system, forming a primary side circulation. The cold source system is an external cold source, such as a cooling tower, air cooler, or chiller unit. The two ends of the second liquid cooling pipe 200 are connected to the two ends of a target cold plate, forming a secondary side circulation. The target cold plate is the cold plate installed on the object to be cooled, such as the cold plate of a cold plate-type liquid-cooled server.

[0030] The heat exchanger 300 is provided with a first heat exchange channel 310 and a second heat exchange channel 320, and heat exchange can be achieved between the first heat exchange channel 310 and the second heat exchange channel 320 within the heat exchanger 300. The first heat exchange channel 310 is connected to the first liquid cooling pipe 100, and the second heat exchange channel 320 is connected to the second liquid cooling pipe 200, so that the first liquid cooling pipe 100 and the second liquid cooling pipe 200 achieve heat exchange through the heat exchanger 300.

[0031] The second liquid cooling line 200 is equipped with a mechanical safety valve 210, a solenoid valve 220, and a first pressure sensor. The mechanical safety valve 210 controls the connection between the second liquid cooling line 200 and the outside environment. The mechanical safety valve 210 has a built-in metal spring; when the liquid pressure inside the second liquid cooling line 200 increases, the metal spring is compressed. When the liquid pressure rises to the set range of the mechanical safety valve 210, the elastic force generated by the compressed metal spring opens the mechanical safety valve 210, allowing the liquid inside the second liquid cooling line 200 to communicate with the outside environment, releasing some liquid, reducing the liquid pressure inside the second liquid cooling line 200, and closing the mechanical safety valve 210 once it returns to a safe range.

[0032] The first pressure sensor detects the liquid pressure within the second liquid cooling pipeline 200, and the solenoid valve 220 controls the connection between the second liquid cooling pipeline 200 and the outside environment. The mechanical safety valve 210 operates independently of the solenoid valve 220. The first pressure sensor and the solenoid valve 220 are communicatively connected. When the measured value of the first pressure sensor is greater than or equal to a first preset value, the solenoid valve 220 is opened, connecting the second liquid cooling pipeline 200 to the outside environment to release some liquid and reduce the liquid pressure within the second liquid cooling pipeline 200. When the measured value of the first pressure sensor is less than the first preset value, the solenoid valve 220 is closed, disconnecting the second liquid cooling pipeline 200 from the outside environment to maintain the liquid pressure within the second liquid cooling pipeline 200. This allows for precise positioning of the upper limit of the safe pressure within the system, meaning that the liquid pressure within the second liquid cooling pipeline 200 can be released promptly when it reaches the upper limit of the safe pressure, protecting the safety of the system, and the aging risk is far lower than that of a mechanical spring. In addition, when the first pressure sensor or solenoid valve 220 fails to work properly, the pressure safety in the second liquid cooling pipeline 200 can be guaranteed by the mechanical safety valve 210, thereby improving the safety and reliability of the cooling device.

[0033] The cooling device also includes a water supply line 400, which is equipped with a liquid replenishment tank 410, a liquid replenishment pump 420, and an electrically operated ball valve 430. One end of the water supply line 400 is connected to the second liquid cooling line 200, and the other end is connected to the liquid replenishment tank 410. When the electrically operated ball valve 430 and the liquid replenishment pump 420 are opened, water from the liquid replenishment tank 410 is added to the second liquid cooling line 200 under the power generated by the liquid replenishment pump 420, thus replenishing the liquid working medium inside the second liquid cooling line 200. After replenishment is completed, closing the electrically operated ball valve 430 and the liquid replenishment pump 420 disconnects the second liquid cooling line 200 from the liquid replenishment tank 410, ensuring that the liquid in the liquid replenishment tank 410 does not affect the normal flow of liquid in the second liquid cooling line 200.

[0034] In addition, the liquid leaked from the mechanical safety valve 210 and the solenoid valve 220 can be returned to the replenishment tank 410 through a separate pipeline or after treatment. The replenishment tank 410 is equipped with an overflow port and a water inlet. The bottom of the replenishment tank 410 is equipped with a drain port. A level gauge is also installed on one side of the replenishment tank 410. The level gauge can be used to detect the amount or height of the liquid in the replenishment tank 410, so as to make it easy to know the amount of liquid in the replenishment tank 410.

[0035] The replenishment tank 410 has a vertically oriented suction pipe 411 inside, with its top end extending through the top of the replenishment tank 410 and its bottom end extending to the bottom of the replenishment tank 410. The input end of the replenishment pump 420 is connected to the top of the replenishment tank 410 via the suction pipe 411, allowing the replenishment pump 420 to draw liquid working fluid from the replenishment tank 410. Compared to placing the suction port (i.e., the input end of the replenishment pump 420) on the side of the replenishment tank 410, placing the suction port at the top of the replenishment tank 410 and incorporating the suction pipe 411 within the replenishment tank 410 reduces the space occupied by the connection structure between the replenishment tank 410 and the replenishment pump 420, saving external space and allowing for a larger replenishment tank size, thus increasing space utilization and design redundancy.

[0036] Furthermore, multiple holes 412 are provided on the outer periphery of the bottom of the water suction pipe 411. These holes 412 communicate with the water suction pipe 411, and the opening at the bottom of the water suction pipe 411 is not the only inlet for water intake, thus improving the water suction efficiency of the water suction pipe 411. Simultaneously, raising the water suction position reduces the intake of impurities from the bottom of the replenishment tank 410. An ultraviolet germicidal lamp 413 is also installed inside the replenishment tank 410. The ultraviolet germicidal lamp 413 is waterproof. The ultraviolet germicidal lamp 413 continuously sterilizes the liquid working fluid stored in the replenishment tank 410, effectively inhibiting bacterial growth. Combined with regular drainage and replenishment, this maintains the water quality of the replenishment tank 410 to a qualified standard.

[0037] A second pressure sensor is also installed inside the second liquid cooling pipeline 200, which can detect the pressure of the liquid inside the second liquid cooling pipeline 200. The second pressure sensor, the replenishment pump 420, and the electric switch ball valve 430 are interconnected. When the measured value of the second pressure sensor is lower than the second preset pressure value, it indicates that the liquid in the second liquid cooling pipeline 200 is insufficient and needs to be replenished. In this case, the electric switch ball valve 430 and the replenishment pump 420 are controlled to open, and the liquid in the replenishment tank 410 is added to the second liquid cooling pipeline 200 through the replenishment pipeline 400 to ensure that the liquid pressure in the second liquid cooling pipeline 200 is above the second preset pressure value.

[0038] In a cooling device, two heat exchangers 300 of the same specification are provided, both of which are plate heat exchangers. The two heat exchangers 300 are connected in parallel. That is, when the first liquid cooling pipe 100 connects to the heat exchanger 300, it branches into two pipes, which respectively enter the first heat exchange channel 310 of the two heat exchangers, and the pipes coming out of the first heat exchange channel 310 of the two heat exchangers converge together. When the second liquid cooling pipe 200 connects to the heat exchanger 300, it branches into two pipes, which respectively enter the second heat exchange channel 320 of the two heat exchangers, and the pipes coming out of the second heat exchange channel 320 of the two heat exchangers converge together.

[0039] The second liquid cooling line 200 is equipped with two main circulation pumps 230. The two main circulation pumps 230 are connected in parallel, meaning their input terminals and output terminals are connected. Both main circulation pumps 230 are canned motor pumps with permanent magnet synchronous motors. Compared to ordinary water pumps, canned motor pumps with permanent magnet synchronous motors have the following advantages:

[0040] a. Major vulnerable components such as mechanical seals have been eliminated to ensure that the water pump is leak-free;

[0041] b. The ball bearings and cooling fan, which require regular maintenance, have been eliminated, resulting in a water pump with high wear resistance and low noise.

[0042] c. It adopts a permanent magnet synchronous motor, which improves efficiency by 5% compared to traditional asynchronous motors;

[0043] d. The maximum speed of the water pump is increased by more than 50%, the size is reduced by 60%, and the space utilization rate is higher;

[0044] e. Wider speed adjustment range, wider applicability.

[0045] In traditional cooling system designs, there is only one plate heat exchanger 300. Furthermore, considering the weight and vibration issues of the main circulating pump 230, it is often placed directly at the bottom of the system, installed side-by-side with the plate heat exchanger 300, or even placed above the main circulating pump 230. In these cases, the weight distribution of the cooling system is uneven, the center of gravity is high or biased to one side, and the overall stability is poor.

[0046] In this embodiment, during the assembly of the various components of the cooling device, all or most of the components are integrated and installed in a single cabinet. The cabinet is equipped with a door 600 for easy maintenance and adjustment. Two heat exchangers 300 are installed side-by-side at the bottom of the cabinet, ensuring even weight distribution and a centrally located center of gravity. Simultaneously, the use of a permanent magnet synchronous motor-driven canned pump significantly reduces the weight and vibration of the main circulation pump 230. The two main circulation pumps 230 are placed side-by-side above the two plate heat exchangers 300, with each pump corresponding to one heat exchanger. At this point, the two main circulation pumps 230 are also positioned in the lower-middle part of the cabinet, resulting in a symmetrical structure and a centrally located center of gravity. This design greatly improves both the operational stability and transportation stability of the cooling device.

[0047] In addition, a folder is provided at the bottom of cabinet door 600 for storing equipment drawings, maintenance manuals, and other documents, facilitating daily maintenance work. The folder is positioned at a height where it can be easily reached and placed by a person with their arms hanging down, making it convenient to operate. Cabinet door 600 is equipped with double rows of ventilation holes. The upper row of ventilation holes is located behind the motor of the main circulation pump 230, used to enhance the heat dissipation of the main circulation pump 230; the lower row of ventilation holes is located at the bottom of cabinet door 600, which, together with the fan located on top of the cooling device, promotes airflow circulation inside the cabinet.

[0048] An expansion tank 500 is connected between the second liquid cooling line 200 and the solenoid valve 220. The expansion tank 500 can balance and stabilize the hydraulic pressure within the second liquid cooling line 200. The expansion tank 500 can be a pneumatic expansion tank. When the pressure in the second liquid cooling line 200 is high, liquid enters the expansion tank 500, reducing the hydraulic pressure within the second liquid cooling line 200; when the pressure in the second liquid cooling line 200 is low, liquid will enter the second liquid cooling line 200 from the expansion tank 500, increasing the hydraulic pressure within the second liquid cooling line 200. Therefore, the expansion tank 500 can maintain a stable secondary circulation pressure and absorb volume changes in the secondary circulation liquid working fluid.

[0049] Reference Figure 1 The part numbers on the cooling device are explained as follows:

[0050] 1-1~2 Main circulation pump; 2-1~2 Check valve; 3-1~9 Pressure sensor; 4-1~3 Filter; 5-1~5 Exhaust valve; 6-1~7 Drain valve; 7-1~7 Butterfly valve; 8-1 Mechanical safety valve; 9-1~5 Temperature sensor; 10-1~2 Flow sensor; 11-1~2 Plate heat exchanger; 12-1~15 Ball valve; 13-1~2 Expansion tank; 14-1 Electric on / off ball valve; 15-1 Replenishment pump; 16-1 Replenishment tank; 17-1 Liquid level sensor; 18-1 Electric regulating ball valve; 19-1 Solenoid valve.

[0051] When the system is running, the secondary circulating working fluid (typically water, ethylene glycol solution, propylene glycol solution, etc.) absorbs heat generated by the server chips at the cold plate. After its temperature rises, it enters the cooling device through the secondary inlet. Inside the cooling device, the secondary working fluid exchanges heat with the primary circulating working fluid (typically water, ethylene glycol solution, propylene glycol solution, etc.) via a plate heat exchanger. After its temperature decreases, the secondary working fluid is pressurized by the main circulation pump and re-enters the liquid-cooled server cold plate to absorb heat, thus repeating the cycle. The primary working fluid absorbs heat from the secondary working fluid in the plate heat exchanger, its temperature rises, and it returns to the external cold source for heat dissipation and cooling before re-entering the cooling device's plate heat exchanger for heat exchange, in a continuous cycle.

[0052] The primary side of the cooling unit is equipped with an electric ball valve, sensors, and filters. The electric regulating ball valve 18-1 can adjust the flow rate of the primary side of the cooling unit according to the supply liquid temperature of the secondary side of the cooling unit; the flow sensor, temperature sensor, and pressure sensor can monitor the flow rate, temperature, and pressure of the working fluid on the primary side of the cooling unit, respectively; the filter can filter the working fluid on the primary side of the cooling unit to prevent impurities from clogging the cooling unit pipeline.

[0053] The secondary side of the cooling system is equipped with a main circulation pump, sensors, an expansion tank, a replenishment tank, a replenishment pump, a filter, a mechanical safety valve, and a solenoid valve. Two main circulation pumps provide the circulating power for the working fluid on the secondary side of the cooling system, operating in parallel under design conditions. Flow sensors, temperature sensors, and pressure sensors monitor the flow rate, temperature, and pressure of the working fluid on the secondary side of the cooling system, respectively.

[0054] The expansion tank maintains stable pressure in the secondary circulation of the cooling system and absorbs volume changes in the secondary working fluid. Pressure sensors detect underpressure or water shortages in the secondary piping and promptly replenish water via a replenishment pump and an electrically operated ball valve. A filter prevents impurities from clogging the cooling system and server. Mechanical safety valves and solenoid valves protect the entire secondary system from overpressure. The secondary side also includes bypass interfaces for an electric ball valve, conductivity sensor, and pH sensor, allowing for optional component selection based on specific needs.

[0055] In addition, a non-positional leakage monitoring sensor can be installed at the bottom of the cooling device, and a secondary side pipeline positioning leakage monitoring controller is reserved in the cooling device electrical cabinet; a temperature and humidity sensor is installed next to the ventilation hole at the bottom of the cabinet door to monitor the ambient temperature and humidity and control condensation prevention; the plate heat exchanger is used for both the primary and secondary sides.

[0056] It should be noted that the first pressure sensor can be Figure 1 The pressure sensor numbered 3-2, 3-3, 3-4, 3-5, or 3-6 in the middle, the second pressure sensor can be... Figure 1 The pressure sensors numbered 3-2, 3-3, 3-4, 3-5, or 3-6 can be the same pressure sensor, with the first and second pressure sensors being the same sensor.

[0057] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A cooling device, characterized in that, include: The first liquid cooling pipeline has two ends for connecting to the two ends of the cold source system; The second liquid cooling pipeline has two ends for connecting to the two ends of the target cold plate. The second liquid cooling pipeline is equipped with a mechanical safety valve, a solenoid valve, and a first pressure sensor for detecting liquid pressure. When the hydraulic pressure in the second liquid cooling pipeline is higher than a preset range, the mechanical safety valve is opened under the action of the hydraulic pressure to release some liquid and reduce the hydraulic pressure in the second liquid cooling pipeline. When the measured value of the first pressure sensor is greater than or equal to a first preset value, the solenoid valve is controlled to open to release some liquid and reduce the hydraulic pressure in the second liquid cooling pipeline. When the measured value of the first pressure sensor is less than the first preset value, the solenoid valve is controlled to close. The heat exchanger is provided with a first heat exchange channel and a second heat exchange channel that can exchange heat with each other. The first heat exchange channel is connected to the first liquid cooling pipeline, and the second liquid cooling pipeline is connected to the second heat exchange channel.

2. The cooling device according to claim 1, characterized in that: It also includes a water replenishment pipeline connected to the second liquid cooling pipeline. The water replenishment pipeline is equipped with a liquid replenishment tank, a liquid replenishment pump, and an electric ball valve. By controlling the opening of the electric ball valve and the liquid replenishment pump, liquid in the liquid replenishment tank can be added to the second liquid cooling pipeline.

3. The cooling device according to claim 2, characterized in that: A water suction pipe extending to the bottom of the replenishment tank is inserted through the top of the replenishment tank, and the input end of the replenishment pump is connected to the top of the water suction pipe.

4. The cooling device according to claim 3, characterized in that: The bottom outer periphery of the water pump pipe has multiple holes.

5. The cooling device according to claim 2, characterized in that: The fluid replenishment tank is equipped with an ultraviolet germicidal lamp.

6. The cooling device according to claim 2, characterized in that: The second liquid cooling pipeline is equipped with a second pressure sensor for detecting liquid pressure. When the measured value of the second pressure sensor is lower than the second preset pressure value, the electric switch ball valve and the replenishment pump are controlled to add liquid from the replenishment tank into the second liquid cooling pipeline.

7. The cooling device according to claim 1, characterized in that: The second liquid cooling pipeline is equipped with a main circulation pump for providing power, which is a permanent magnet synchronous motor canned pump.

8. The cooling device according to claim 1, characterized in that: There are two heat exchangers, which are connected in parallel.

9. A cooling device according to claim 8, characterized in that: The second liquid cooling pipeline is equipped with two main circulation pumps connected in parallel. The main circulation pumps are permanent magnet synchronous motor canned pumps. The two heat exchangers are installed side by side, and the two permanent magnet synchronous motor canned pumps are respectively installed on the upper part of the two heat exchangers.

10. A cooling device according to claim 1, characterized in that: An expansion tank for stabilizing hydraulic pressure is connected between the second liquid cooling line and the solenoid valve.

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