Water-cooled heat sink

Abstract

The application provides a water-cooled heat dissipation device, and the specific structure comprises: a heat dissipation main body arranged in an electric control cabinet, comprising an air cooler and a heat dissipation fan, the heat dissipation fan is used for driving air in the electric control cabinet to flow through the air cooler for heat exchange; a cold water loop comprising a water taking pipe and a water returning pipe, one end of the water taking pipe is connected with a water inlet of the air cooler, the other end is used for being connected with a water taking point of an external cold water source, one end of the water returning pipe is connected with a water outlet of the air cooler, and the other end is used for being connected with a water returning point of the external cold water source; and a driving device used for driving the cooling liquid to flow in the cold water loop. The water-cooled heat dissipation device provided by the application has the characteristics of high protection level, simple structure and low cost.

Description

Technical Field

[0001] This application relates to central air conditioning equipment, and more particularly to a water-cooled heat dissipation device for use in the electrical control cabinet of a chilled water central air conditioning system. Background Technology

[0002] Central chilled water air conditioning systems are core cooling equipment widely used in modern buildings, industrial plants, data centers, and other scenarios. Their electrical control cabinets house key precision components such as frequency converters, PLC controllers, contactors, and circuit breakers, serving as the control and power hub of the unit. These components continuously generate heat during operation. A stable and reliable heat dissipation system is crucial for ensuring the normal operation of these components, preventing overheating shutdowns, and extending the equipment's lifespan. It directly determines the operational stability and safety of the central air conditioning unit.

[0003] Currently, conventional cooling solutions for the electrical control cabinets of chilled water central air conditioning systems mainly employ two types of technical solutions. The first type is the cotton core filter air cooling solution, where a fan drives outside air to flow through the filter before entering the control cabinet, directly cooling the components and maintaining direct contact with the atmosphere. The second type is the cabinet air conditioning cooling solution, which uses an independent compression refrigeration circuit to form a closed internal air circulation cooling system within the control cabinet, without contact with the atmosphere.

[0004] Cotton core filter air cooling solutions, due to their direct connection to the atmosphere, have a low upper limit for dust and water resistance IP protection. Under harsh conditions such as high dust, high humidity, and outdoor installation, moisture and dust can easily enter the electrical control cabinet. Meanwhile, while rack-mounted air conditioning solutions can achieve high IP protection, they have their own complete compression refrigeration circuit, resulting in a complex structure and high manufacturing costs. Summary of the Invention

[0005] In view of this, this application provides a water-cooled heat dissipation device, the specific structure of which includes: a heat dissipation body, disposed in an electrical control cabinet, including a surface cooler and a cooling fan, wherein the cooling fan is used to drive the air in the electrical control cabinet to flow through the surface cooler for heat exchange; a cold water circuit, including a water intake pipe and a water return pipe, wherein one end of the water intake pipe is connected to the water inlet of the surface cooler and the other end is used to connect to the water intake point of an external cold water source, and one end of the water return pipe is connected to the water outlet of the surface cooler and the other end is used to connect to the water return point of an external cold water source; and a driving device for driving the cooling liquid to flow in the cold water circuit.

[0006] By adopting the aforementioned specific structure, this application achieves efficient heat exchange by integrating the heat dissipation unit inside the electrical control cabinet and utilizing the combination of the surface cooler and the chilled water circuit. When the heat-generating components inside the electrical control cabinet generate heat, the cooling fan starts, driving the hot air inside the cabinet to flow through the surface cooler. Simultaneously, an external chilled water source delivers chilled water to the inlet of the surface cooler through a water intake pipe. Inside the surface cooler, the chilled water exchanges heat with the hot air flowing over its surface, absorbing heat and increasing in temperature. The water then flows back through the return pipe from the outlet of the surface cooler to the return point of the external chilled water source, thus forming a continuous chilled water cycle. This design cleverly utilizes an existing external chilled water source, eliminating the need for a separate compression refrigeration system, simplifying the device structure, and reducing manufacturing costs. Meanwhile, since the heat dissipation process is mainly completed inside the electrical control cabinet through indirect heat exchange between the air and the surface cooler, the electrical control cabinet can maintain a relatively closed state, effectively improving its dustproof and waterproof IP protection level. It can better adapt to harsh working conditions such as high dust and high humidity, avoid the damage of water vapor and dust to the internal precision components, and ensure the normal operation of the components inside the electrical control cabinet and the operational stability of the equipment.

[0007] As one possible implementation, a control module is also included, wherein a first solenoid valve is installed on the return water pipe and is electrically connected to the control module.

[0008] Using the above-described possible implementation methods, the control module can regulate the flow of the cold water circuit by controlling the opening and closing of the first solenoid valve. When the temperature inside the electrical control cabinet is low and strong heat dissipation is not required, the control module controls the first solenoid valve to close, cutting off the cold water supply and avoiding energy waste. When the temperature inside the electrical control cabinet rises to a set threshold, the control module controls the first solenoid valve to open, restoring the flow of the cold water circuit and ensuring that the heat dissipation unit can exchange heat in a timely manner. This achieves intelligent control of the heat dissipation process, further improving the energy efficiency and operating efficiency of the device.

[0009] As one possible implementation, the driving device is a circulating water pump within an external cold water source.

[0010] As one possible implementation, a flow regulating valve is installed on the water intake pipe, and the flow regulating valve is electrically connected to the control module.

[0011] Using the above-described possible implementation methods, the control module can precisely control the flow rate of chilled water entering the surface cooler by adjusting the opening of the flow regulating valve based on the real-time temperature inside the electrical control cabinet. When the temperature inside the electrical control cabinet is high and enhanced heat dissipation is required, the control module controls the flow regulating valve to increase the opening, thereby increasing the chilled water flow and improving the heat exchange capacity of the surface cooler, thus rapidly reducing the temperature inside the electrical control cabinet. When the temperature inside the electrical control cabinet tends to stabilize or decrease, the control module controls the flow regulating valve to decrease the opening, reducing the chilled water flow and avoiding excessive heat dissipation and energy waste. This precise flow control allows the water-cooled heat dissipation device to dynamically adjust according to actual heat dissipation needs, further optimizing heat dissipation efficiency and energy-saving performance, ensuring that the temperature inside the electrical control cabinet is always maintained within a suitable operating range.

[0012] As one possible implementation, the driving device is a water pump installed on the water intake pipe.

[0013] As one possible implementation, a second solenoid valve is installed on the water intake pipe, and the second solenoid valve is located between the water pump and the water intake point; a check valve is installed on the water intake pipe, and the check valve is located between the water pump and the water inlet of the surface cooler.

[0014] As a possible implementation, at least one air guide plate is also included, which is disposed in the electrical control cabinet to direct the airflow generated by the cooling fan to the heat-generating components inside the electrical control cabinet.

[0015] By employing the aforementioned possible implementation methods, the air guide plate can directionally direct the airflow driven by the cooling fan, enabling it to be directed more precisely towards the main heat-generating components within the electrical control cabinet. By optimizing the airflow path, it avoids heat dissipation dead zones caused by irregular airflow diffusion within the cabinet, significantly improving the airflow velocity and heat exchange efficiency around the heat-generating components.

[0016] As one possible implementation, a water collection tray is also included, which is disposed below the surface cooler.

[0017] The above-mentioned possible implementation methods are used to accommodate liquid leakage in the electrical control cabinet.

[0018] As one possible implementation, the water receiving tray is equipped with an overflow detection sensor, which is electrically connected to the control module.

[0019] Using the above-described possible implementation methods, when the leaked liquid in the receiving pan accumulates to the set water level due to poor drainage or other reasons, the overflow detection sensor can promptly detect this situation and transmit the signal to the control module. Upon receiving the overflow signal, the control module can immediately take corresponding protective measures, thus effectively preventing the leaked liquid from overflowing the receiving pan and wetting the components inside the electrical control cabinet, further improving the safety and reliability of the device operation.

[0020] As one possible implementation, the heat dissipation unit also includes a temperature sensor, which is electrically connected to the control module.

[0021] Using the above-described possible implementation methods, the temperature sensor can monitor the temperature inside the electrical control cabinet in real time and continuously transmit the temperature signal to the control module. The control module uses this temperature signal as the core basis for regulation, realizing intelligent management of the entire water-cooled heat dissipation device. Attached Figure Description

[0022] The various technical features of this application and their relationships will be further explained below with reference to the accompanying drawings. The drawings are exemplary; some technical features are not shown to scale, and some drawings may omit technical features commonly used in the art to which this application pertains that are not essential for understanding and implementing this application, or additionally show technical features that are not essential for understanding and implementing this application. In other words, the combination of various technical features shown in the drawings is not intended to limit this application. Furthermore, throughout this application, the same reference numerals refer to the same things. Specific descriptions of the drawings are as follows:

[0023] Figure 1 This is a schematic diagram of the water-cooled heat dissipation device according to the first embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the water-cooled heat dissipation device according to the second embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the heat dissipation body in the water-cooled heat dissipation device according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached diagram: 1-Central air conditioning unit; 10-Evaporator; 20-Circulating water pump; 100-Electrical control cabinet; 110-Heat dissipation unit; 111-Cooler; 1111-Cooler inlet; 1112-Cooler outlet; 112-Cooling fan; 113-Drain tray; 114-Overflow detection sensor; 115-Temperature sensor; 120-Air guide plate; 200-Water intake pipe; 210-Water intake point; 220-Flow regulating valve; 230-Second solenoid valve; 240-Water pump; 250-Check valve; 300-Return water pipe; 310-Return water pipe; 320-First solenoid valve. Detailed Implementation

[0027] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0028] This application provides a water-cooled heat dissipation device for cooling the electrical control cabinet of a central air conditioning system. It features high IP protection level, simple structure, and low cost. The water-cooled heat dissipation device in this embodiment consists of a heat dissipation body 110, a cold water circuit, and a driving device. The heat dissipation body 110 cooperates with the cold water circuit to exchange heat with the hot air inside the electrical control cabinet 100. The driving device drives the cooling liquid to flow in the cold water circuit.

[0029] Among them, such as Figure 1 , 2 As shown, the heat dissipation unit 110 is installed in the electrical control cabinet 100. The heat dissipation unit 110 adopts a standardized and modular integrated structure, which can be directly adapted to electrical control cabinets of different specifications of chilled water central air conditioning systems. Figure 3 As shown, the heat dissipation body 110 specifically includes a surface cooler 111 and a cooling fan 112.

[0030] In this embodiment, as Figure 3 As shown, the surface cooler 111 is a finned tube surface cooler. The fins and copper tubes are tightly bonded together through an efficient expansion joint process, resulting in a large heat dissipation surface area and excellent thermal conductivity, which significantly enhances the heat exchange efficiency between air and chilled water. Specifically, the heat exchange tubes of the finned tube surface cooler are made of copper tubing with a diameter of 7mm and a wall thickness of 0.32mm. The heat exchange fins are made of corrugated hydrophilic aluminum foil with a thickness of 0.12mm. The spacing between the fins is designed to be 1.69mm, and the heat exchange area is planned to be 0.5 square meters based on the heat load matching of the electrical control cabinet. In other embodiments, the surface cooler 111 can also adopt a plate or microchannel structure, or a finned tube surface cooler with heat exchange fins of other sizes.

[0031] Among them, such as Figure 3 As shown, the cooling fan 112 drives the air inside the electrical control cabinet 100 to flow through the surface cooler 111 for heat exchange, and the two work together to form a closed internal circulation loop. This internal circulation design not only isolates external dust and moisture from intrusion, but also ensures the long-term stable operation of the components inside the cabinet in harsh environments such as high humidity and high dust.

[0032] In this embodiment, as Figure 3As shown, the cooling fan 112 is positioned on one side of the surface cooler 111 to ensure uniform airflow across the fin gaps and prevent localized eddies that could reduce heat exchange efficiency. The cooling fan 112 is a low-noise internal circulation axial fan with a rated voltage of AC220V, a rated airflow of 500 m³ / h, and a wind pressure of 100 Pa. Alternatively, in other embodiments, other types and models of cooling fans 112 can be used. Furthermore, the cooling fan 112 can be placed in other locations within the electrical control cabinet 100, as long as it maintains a stable airflow along the surface of the surface cooler and forms an efficient heat exchange path.

[0033] In this embodiment, the surface cooler 111 and the cooling fan 112 are mounted inside the electrical control cabinet 100 via a mounting frame made of galvanized steel sheet. Alternatively, in other embodiments, the mounting frame may be made of stainless steel or aluminum alloy, or other fixing methods may be used, such as rivets or welding.

[0034] The inlet 1111 and outlet 1112 of the surface cooler are respectively connected to the water intake pipe 200 and the return pipe 300 to form a cold water circuit.

[0035] In this embodiment, the water intake pipe 200 and the water return pipe 300 are made of DN15 stainless steel. Alternatively, in other embodiments, copper pipes, PEX pipes, or reinforced PVC pipes may be used.

[0036] In this embodiment, after the cold water circuit is installed, a 1.0MPa water pressure test is performed on the cold water circuit, and the pressure must be maintained for 30 minutes without leakage.

[0037] Preferably, filters are installed in the water intake pipe 200 and the water return pipe 300.

[0038] Among them, such as Figure 1 , 2 As shown, the other end of the water intake pipe 200 is the water intake point 210; the other end of the return water pipe 300 is the return water point 310. The water intake point 210 and the return water point 310 are located on an external cold water source.

[0039] Among them, such as Figure 1 , 2 As shown, the water-cooled heat dissipation device provided in this application includes at least one air guide plate 120. The air guide plate 120 is disposed in the electrical control cabinet 100 and is used to guide the airflow generated by the cooling fan 112 to the heat-generating components within the electrical control cabinet 100. The air guide plate 120 can directionally guide the airflow driven by the cooling fan 112, making it more precisely blown onto the main heat-generating components within the electrical control cabinet. By optimizing the airflow path, the irregular diffusion of airflow within the cabinet, which leads to heat dissipation dead zones, is avoided, significantly improving the airflow speed and heat exchange efficiency around the heat-generating components.

[0040] In this embodiment, there is one air guide plate 120, which is integrated and installed on the heat dissipation body 110. In other embodiments, there may be two or more air guide plates 120, which may be installed in an angle-adjustable manner using a hinged structure, an electric adjustment mechanism, or the like.

[0041] The water-cooled heat dissipation device provided in this application includes a control module (not shown). The control module can be integrated into the central air conditioning main control system in the electrical control cabinet, or it can be an embedded microcontroller unit, independently installed in the heat dissipation body 110. The control module is used to control the start and stop of the drive device, speed adjustment, and fault self-diagnosis.

[0042] The heat dissipation unit 110 includes a temperature sensor 115, which is electrically connected to the control module. The temperature sensor 115 can monitor the temperature inside the control cabinet in real time and continuously transmit the temperature signal to the control module. The control module uses this temperature signal as the core basis for regulation and control, realizing intelligent management of the entire water-cooled heat dissipation device.

[0043] In this embodiment, the temperature sensor 115 is integrated into the cooling fan 112. Alternatively, in other embodiments, the temperature sensor 115 may also be placed on the surface of the component with the highest heat density inside the electrical control cabinet or on the critical airflow path.

[0044] In this embodiment, the temperature sensor 115 is a PT100 type temperature sensor. Alternatively, in other embodiments, the temperature sensor 115 may be an NTC thermistor, a DS18B20 digital temperature sensor, or an infrared non-contact temperature measurement module, etc.

[0045] The return water pipe 300 is equipped with a first solenoid valve 320. The first solenoid valve 320 is electrically connected to the control module. The control module can regulate the flow of the cold water circuit by controlling the opening and closing of the first solenoid valve 320. The control module is linked with the temperature sensor 115. When the temperature sensor 115 detects that the temperature inside the control cabinet 100 is at a low level and no strong heat dissipation is required, the control module will close the first solenoid valve 320 to interrupt the cold water supply and prevent energy waste. When the temperature sensor 115 detects that the temperature inside the control cabinet 100 rises to a set threshold, the control module will open the first solenoid valve 320 to restore the flow of the cold water circuit, ensuring that the heat dissipation unit 110 can quickly complete heat exchange, thereby realizing intelligent regulation of the heat dissipation process and further enhancing the energy-saving effect and operating efficiency of the water-cooled heat dissipation device provided in this application.

[0046] Preferably, the temperature threshold of the electrical control box is set to 30℃.

[0047] A water collection tray 113 is installed below the surface cooler 111 to collect any leaks that may occur in the electrical control cabinet (leaks may include condensate generated during the operation of the surface cooler and cold water that may accidentally leak from pipe connections). An overflow detection sensor 114 is installed in the water collection tray 113 and is electrically connected to the control module. When leaks in the water collection tray 113 accumulate to a set water level due to poor drainage, the overflow detection sensor 114 can detect this situation promptly and transmit a signal to the control module. Upon receiving the overflow signal, the control module can immediately take corresponding protective measures, thus effectively preventing leaks from overflowing the water collection tray 113 and wetting the components inside the electrical control cabinet 100, further improving the safety and reliability of the cold water heat exchange device provided in this application.

[0048] In this embodiment, the water receiving tray 113 is made of stainless steel and has a depth of 20mm. Furthermore, the area of ​​the water receiving tray 113 completely covers the vertical projected area of ​​the surface cooler 111.

[0049] In this embodiment, the overflow detection sensor 114 is an electrode-type sensor. Alternatively, in other embodiments, the overflow detection sensor 114 may be a float switch, an ultrasonic level sensor, or an optical level sensor.

[0050] In this embodiment, the corresponding protection measures include audible and visual alarms, and simultaneous uploading of fault signals to the control module. Simultaneously, the control module closes the first solenoid valve 320 and the drive device, completely cutting off the cold water circuit supply.

[0051] In this embodiment, the external cold water source is the cold water circulation pipeline in a chilled water central air conditioning system. The water intake point 210 is located at the outlet main water pipe of the evaporator 10 in the chilled water central air conditioning system. The selection of the return point 310 depends on whether a circulating water pump 20 is installed on the main cold water circulation pipeline of the evaporator 10 in the chilled water central air conditioning system as a driving device, thus forming the first and second embodiments of the water-cooled heat dissipation device involved in this application:

[0052] In the first embodiment, as Figure 1 As shown, a circulating water pump 20 is installed on the cold water circulation pipeline in the cold water central air conditioning system. The circulating water pump 20 is used as a driving device, and the return water point 310 is located on the upstream side of the circulating water pump 20 so as to use the pressure difference generated by the circulating water pump 20 to drive the cold water to circulate naturally in the cold water circuit.

[0053] Among them, such as Figure 1As shown, in the first embodiment, a flow regulating valve 220 is installed on the water intake pipe 200, and the flow regulating valve 220 is electrically connected to the control module. The control module is linked with the temperature sensor 115 and can precisely control the flow rate of cold water entering the surface cooler 111 by adjusting the opening of the flow regulating valve 220 according to the real-time temperature inside the electrical control cabinet 100. When the temperature inside the electrical control cabinet 100 is high and the heat dissipation effect needs to be enhanced, the control module controls the flow regulating valve 220 to increase the opening, thereby increasing the cold water flow and improving the heat exchange capacity of the surface cooler 111, thus quickly reducing the temperature inside the electrical control cabinet 100. When the temperature inside the electrical control cabinet 100 tends to be stable or low, the control module controls the flow regulating valve 220 to decrease the opening, thereby reducing the cold water flow and avoiding excessive heat dissipation and energy waste. Through the precise flow control of the flow regulating valve 220, the water-cooled heat dissipation device provided in this application can be dynamically adjusted according to the actual heat dissipation needs, further optimizing the heat dissipation efficiency and energy-saving performance, and ensuring that the temperature inside the electrical control cabinet 100 is always maintained within a suitable operating range.

[0054] In the second embodiment, as Figure 2 As shown, since the chilled water circulation pipeline in the chilled water central air conditioning system does not have a circulating water pump 20, the return water point 310 is located at least 200mm downstream of the water intake point 210 to ensure that the intake water is not affected by the higher return water temperature. An additional water pump 240 is added to the chilled water circuit as a drive device to maintain stable water pressure and flow rate in the circuit. The control module can be linked to the temperature sensor 115 and control the start, stop, and speed of the water pump 240 based on the temperature inside the control cabinet 100, further improving temperature control accuracy and energy-saving effect.

[0055] In this embodiment, the water pump 240 has a rated power of 0.37kW, a rated flow rate of 2m³ / h, and a head of 10m. In other embodiments, other models of water pumps can be selected to meet the flow requirements under different operating conditions.

[0056] Among them, such as Figure 2 As shown, in the second embodiment, a second solenoid valve 230 is installed on the water intake pipe 200, and the second solenoid valve 230 is located between the water pump 240 and the water intake point 210; a check valve 250 is installed on the water intake pipe 200, and the check valve 250 is located between the water pump 240 and the inlet 1111 of the surface cooler. The second solenoid valve 230 is electrically connected to the control module and is used to automatically cut off the water flow of the water intake pipe 200 when the water pump 240 stops. The check valve 250 prevents cold water backflow when the system stops, ensuring safe and stable operation of the system. Meanwhile, the rated pressure of the check valve 250 is not less than 1.6 MPa.

[0057] In summary, the water-cooled heat dissipation device provided in this application has the following significant advantages:

[0058] 1. High protection level and strong operational reliability: The fully enclosed electrical control cabinet 100 adopts an internal air circulation design, which is not connected to the external atmosphere. This meets the high IP protection level requirements of the electrical control cabinet 100, completely prevents electrical faults caused by dust and moisture intrusion, greatly improves the operational stability of the electrical control cabinet 100 in harsh environments such as high humidity, high dust, and outdoor environments, and extends the service life of components.

[0059] 2. Significant cost advantage and convenient maintenance: The core heat dissipation structure consists of only the surface cooler 110 and the cooling fan 120, without the need for an independent compression refrigeration circuit. Compared with traditional rack air conditioners, the manufacturing cost is significantly reduced. At the same time, the structure is simple, with fewer moving parts and a low failure rate. Daily maintenance only requires cleaning the water filter, which significantly reduces maintenance costs and difficulty.

[0060] 3. High space utilization and strong adaptability: The device has a compact design and can be directly integrated into the electrical control cabinet 100 without occupying additional unit installation space, perfectly matching the compact layout of chilled water central air conditioning; the dual-condition water circuit design can be adapted to air-cooled chiller units with or without circulating water pump 20, and the control module can be flexibly selected according to needs, taking into account both standardization and customization requirements, with strong versatility.

[0061] 4. Reasonable temperature control and significant energy saving: The control module realizes closed-loop control of the temperature within the electrical control cabinet 100, avoiding drastic temperature fluctuations caused by traditional heat dissipation methods and ensuring the stable operation of precision components; at the same time, it prioritizes the use of the unit's own pressure difference to drive water circulation, requiring no additional power. Only in the case of no circulating water pump 20, a small water pump 240 is selected, resulting in energy consumption far lower than traditional cabinet air conditioners, with outstanding energy saving effect.

[0062] 5. Comprehensive safety protection to reduce the risk of water leakage: Equipped with double protection of overflow detection and emergency water circuit shut-off, it can provide early warning and handle the situation as soon as possible in the event of pipeline leakage, fundamentally solving the safety hazard of water-cooled heat dissipation leakage and ensuring the electrical safety of the central air conditioning unit.

[0063] 6. High efficiency of cold source utilization and no redundancy design: It directly uses the chilled water of the central air conditioning unit as the cold source, without the need for additional cold source equipment. It realizes the cascade utilization of the unit's cold source, avoids redundant waste of energy and structure, and has strong compatibility with air-cooled chiller units.

[0064] The term “comprising” as used throughout this application should not be construed as limited to what is listed thereafter; it does not exclude other structural elements or steps.

[0065] It is understood that those skilled in the art can combine the features mentioned in one or more embodiments throughout this application with features from other embodiments in any appropriate manner to implement this application.

[0066] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the technical concept of this application, all of which fall within the scope of protection of this application.

Claims

1. A water-cooled heat dissipation device, characterized in that, include: The heat dissipation unit is located inside the electrical control cabinet and includes a surface cooler and a cooling fan. The cooling fan is used to drive the air inside the electrical control cabinet to flow through the surface cooler for heat exchange. The cold water circuit includes a water intake pipe and a water return pipe. One end of the water intake pipe is connected to the water inlet of the surface cooler, and the other end is used to connect to the water intake point of an external cold water source. One end of the water return pipe is connected to the water outlet of the surface cooler, and the other end is used to connect to the water return point of an external cold water source. A drive unit for driving the cooling liquid to flow in the cold water circuit.

2. The water-cooled heat dissipation device according to claim 1, characterized in that, It also includes a control module, and a first solenoid valve is installed on the return water pipe, which is electrically connected to the control module.

3. The water-cooled heat dissipation device according to claim 2, characterized in that, The driving device is a circulating water pump located in an external cold water source.

4. The water-cooled heat dissipation device according to claim 3, characterized in that, The water intake pipe is equipped with a flow regulating valve, which is electrically connected to the control module.

5. The water-cooled heat dissipation device according to claim 2, characterized in that, The driving device is a water pump installed on the water intake pipe.

6. The water-cooled heat dissipation device according to claim 5, characterized in that, A second solenoid valve is installed on the water intake pipe, and the second solenoid valve is located between the water pump and the water intake point. A check valve is installed on the water intake pipe, and the check valve is located between the water pump and the water inlet of the surface cooler.

7. The water-cooled heat dissipation device according to claim 4 or 6, characterized in that, It also includes at least one air guide plate, which is disposed in the electrical control cabinet and is used to guide the airflow generated by the cooling fan to the heat-generating components in the electrical control cabinet.

8. The water-cooled heat dissipation device according to claim 4 or 6, characterized in that, It also includes a water receiving tray, which is located below the surface cooler.

9. The water-cooled heat dissipation device according to claim 8, characterized in that, The water receiving tray is equipped with an overflow detection sensor, which is electrically connected to the control module.

10. The water-cooled heat dissipation device according to claim 9, characterized in that, The heat dissipation unit also includes a temperature sensor, which is electrically connected to the control module.

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