Liquid cooling unit opening and closing type test system

Abstract

This invention discloses an open / closed-loop testing system for liquid-cooled units, belonging to the field of fluid testing technology. The system includes a medium storage device, a heating device, a safety device, and a connection device. The medium storage device includes an open-top water tank and a pressure vessel. The heating device includes a PTC water heater and a digital temperature display. The safety device includes a pressure gauge, a safety relief valve, and an air vent valve. The connection device includes pipelines, ball valves, and three-way valves. The open-top water tank is connected sequentially to the ball valve, three-way valve, and another ball valve at the inlet of the test piece via pipelines. This invention achieves convenient switching between open-loop testing mode and closed-loop pressure-holding testing mode through the cooperation of the pressure vessel and the three-way valve. It integrates a medium heating function and uses valve group linkage to prevent medium leakage during disassembly. This effectively solves the technical problems of existing testing systems lacking pressure-holding function, being unable to independently adjust medium temperature, and being prone to leakage during disassembly, significantly improving the comprehensiveness, continuity, and safety of the test.

Description

Technical Field

[0001] This invention relates to the field of fluid testing technology, and more specifically to an open / closed testing system for liquid-cooled units. Background Technology

[0002] Liquid chillers are an important type of heat dissipation equipment, widely used in data centers, industrial equipment, and new energy fields. During the research, development, production, and maintenance of liquid chillers, comprehensive performance testing is necessary to ensure their reliability and stability under actual operating conditions.

[0003] In existing technologies, testing systems for liquid-cooled chiller units typically consist of open-top water tanks, ball valves, and piping, forming an open-circuit testing system. These systems lack pressure-holding capabilities, limiting testing to atmospheric pressure and failing to simulate the pressurized conditions that liquid-cooled chiller units might encounter in real-world applications. This results in the inability to effectively test key performance characteristics such as pressure resistance and sealing performance. Furthermore, the systems lack integrated heating systems, requiring external heating equipment to heat the test medium during actual use. External heating systems increase equipment complexity and operating costs; without them, the medium temperature gradually decreases over time, triggering the chiller's cryogenic protection mechanism and causing shutdown, severely impacting the continuity and stability of the test. Existing systems typically only have a single ball valve for flow control. Disassembling the unit under test requires closing the ball valve and disconnecting the piping. Since a large amount of test medium remains in the piping, this disconnection can easily cause leakage, posing safety hazards, wasting resources, and polluting the environment. Summary of the Invention

[0004] To address these issues, the present invention provides an open / closed testing system for liquid-cooled units.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] According to a first aspect of the present invention, a liquid-cooled unit open / closed test system includes a medium storage device, a heating device, a safety device, and a connection device.

[0007] The medium storage device includes an open water tank and a pressure tank;

[0008] The heating device includes a PTC water heater and a digital temperature display.

[0009] The safety device includes a pressure gauge, a safety relief valve, and an exhaust valve;

[0010] The connecting device includes a pipeline, a ball valve, and a three-way valve; wherein, the ball valve assembly includes a first ball valve, a second ball valve, and a third ball valve, and the three-way valve assembly includes a first three-way valve and a second three-way valve;

[0011] The open-type water tank is connected in sequence to the inlet end of the test piece via pipelines, consisting of a first ball valve, a first three-way valve, and a second ball valve.

[0012] The outlet end of the tested component is connected in sequence to the third ball valve and the second three-way valve, and then connected to the inlet end of the open water tank and the pressure tank through pipelines respectively.

[0013] The outlet end of the pressure tank is connected to the first three-way valve via the PTC water heater;

[0014] The safety relief valve and the exhaust valve are installed on the pipeline between the outlet end of the test piece and the second three-way valve;

[0015] The pressure gauge is installed on the pipeline at the outlet end of the pressure tank;

[0016] The temperature display is located at the outlet of the PTC water heater and is used to monitor the temperature of the medium after heating.

[0017] Furthermore, the system has an open-circuit test mode and a closed-circuit voltage holding test mode;

[0018] In open-circuit test mode, the first three-way valve connects the open water tank to the inlet end of the test piece, and the second three-way valve connects the outlet end of the test piece to the open water tank. The test medium flows sequentially through the open water tank, the first ball valve, the first three-way valve, the second ball valve, the test piece, the third ball valve, and the second three-way valve before returning to the open water tank, forming an open-circuit loop.

[0019] In the closed-loop pressure holding test mode, the first three-way valve connects the pressure tank to the inlet end of the test piece via the PTC water heater, and the second three-way valve connects the outlet end of the test piece to the inlet end of the pressure tank. The test medium flows sequentially through the pressure tank, PTC water heater, first three-way valve, second ball valve, test piece, third ball valve, and second three-way valve before returning to the pressure tank, forming a closed-loop pressure holding circuit isolated from the open water tank.

[0020] Furthermore, the process of switching from open-circuit test mode to closed-circuit pressure holding test mode includes a pressurization phase and a pressure holding phase.

[0021] Pressurization stage: The first three-way valve and the second three-way valve are in the state of connecting the pressure tank to the system and communicating with the open water tank. The system is filled with liquid and pressurized through the pressure tank, and the gas in the system is discharged through the exhaust valve until the system pressure reaches the preset pressure value.

[0022] Pressure holding stage: Close the passages in the first and second three-way valves that connect to the open water tank, so that the test medium circulates only between the pressure tank, PTC water heater, first three-way valve, ball valve, and test piece, forming a closed pressure holding test circuit.

[0023] Furthermore, the opening pressure of the safety relief valve is set to 2.5 bar, and it automatically opens to relieve pressure when the system pressure exceeds 2.5 bar;

[0024] The system operating pressure under the closed-circuit pressure holding test mode is 1.2 bar.

[0025] Furthermore, the PTC water heater has a temperature self-regulation function, automatically heating when the medium temperature is lower than the set temperature and automatically stopping heating when the medium temperature reaches the set temperature.

[0026] The temperature display shows the temperature value of the medium in real time.

[0027] Furthermore, the pressure tank is a rigid liquid storage tank or a pneumatic pressure stabilizing tank;

[0028] When using an airbag-type pressure stabilizing tank, the tank is pre-filled with compressed gas, and pressure buffering and stabilization are achieved through the compression and expansion of the airbag.

[0029] Furthermore, the ball valve is replaced with an electric valve or a solenoid valve, and the three-way valve is replaced with an electric three-way valve;

[0030] The system also includes a PLC controller, which is connected to the electric valve, solenoid valve, electric three-way valve, temperature display and pressure gauge to realize automatic switching between open circuit test mode and closed circuit pressure holding test mode, as well as automatic control of temperature and pressure.

[0031] Furthermore, the pressure gauge is an electronic pressure sensor, and the system also includes an alarm device;

[0032] When the system pressure exceeds a preset threshold, the alarm device emits an audible and visual alarm signal.

[0033] Furthermore, the inlet and outlet ends of the test piece are respectively provided with quick connectors with self-sealing function, which are used to automatically cut off the medium passage when the test piece is disassembled to prevent medium leakage.

[0034] Furthermore, the open-type water tank and the pressure tank are integrated into a single pressurized water tank. The interior of the single pressurized water tank is divided into an atmospheric pressure zone and a pressurized zone by a partition. The atmospheric pressure zone has the same function as the open-type water tank, and the pressurized zone has the same function as the pressure tank.

[0035] The present invention has the following advantages:

[0036] 1. This invention establishes a closed-loop pressure-holding test circuit by integrating a pressure tank and a three-way valve, enabling pressure-holding testing of liquid-cooled units. The pressure can reach 1.2 bar, allowing for effective testing of key performance characteristics such as pressure resistance and sealing performance under pressurized conditions. This solves the problem of existing technologies being unable to perform pressure-holding tests. By integrating a PTC water heater and a digital temperature display, the invention achieves autonomous adjustment and real-time display of the medium temperature, maintaining temperature stability without relying on external heating equipment. This ensures the continuity and stability of long-term testing and avoids unit shutdowns due to medium temperature drops.

[0037] 2. This invention uses a combination of three-way valve and ball valve for control, which enables flexible switching between open and closed circuit modes. Before disassembling the test piece, the medium passage can be cut off by operating the valve, effectively preventing medium leakage. This eliminates safety hazards and avoids waste of resources.

[0038] 3. This invention comprises a safety relief valve, an exhaust valve, a pressure gauge, and a digital temperature display, forming a multi-layered safety protection system. The pressure gauge monitors the system pressure in real time, the safety relief valve automatically releases pressure when overpressure occurs, and the exhaust valve discharges gas from the system before pressurization, comprehensively improving the safety of system operation. The system has a compact structure and is easy to operate. Test mode switching can be achieved by switching one or more three-way valves without changing pipeline connections, thus improving testing efficiency. Attached Figure Description

[0039] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0040] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0041] Figure 1 This is a schematic diagram of the structure of an open-circuit test system in the prior art;

[0042] Figure 2 This is a schematic diagram of the overall structure of the liquid-cooled unit open / closed test system of the present invention;

[0043] Figure 3 This is a schematic diagram illustrating the working principle of the test system of the present invention in open-circuit test mode;

[0044] Figure 4 This is a schematic diagram illustrating the working principle of the test system of the present invention during the closed-circuit test pressurization process;

[0045] Figure 5 This is a schematic diagram illustrating the working principle of the test system of the present invention in closed-circuit pressure holding test mode.

[0046] In the diagram: 1. Open water tank; 2. Ball valve assembly; 3. Piping; 4. Component under test; 5. Air vent valve; 6. Safety relief valve; 7. Three-way valve assembly; 8. PTC water heater; 9. Pressure gauge; 10. Digital temperature display; 11. Pressure tank. Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1

[0049] like Figure 2 As shown, the present invention provides an open-closed test system for liquid-cooled units, which mainly consists of a medium storage device, a heating device, a safety device, and a connection device.

[0050] The media storage device includes an open-top water tank 1 and a pressure tank 11. The open-top water tank 1 is used to store the test medium under normal pressure, providing a media source for the open-circuit test mode. The pressure tank 11 is used to store the test medium under pressure, providing a pressure source for the closed-circuit pressure holding test mode.

[0051] The heating device includes a PTC water heater 8 and a temperature digital display 10. The PTC water heater 8 (positive temperature coefficient water heater) has a self-limiting temperature characteristic; it automatically heats when the medium temperature is lower than the set value and automatically reduces the heating power when the medium temperature reaches the set value, thus achieving stable temperature control. The temperature digital display 10 displays the medium temperature value in real time, facilitating monitoring and adjustment by operators.

[0052] The safety device includes a pressure gauge 9, a safety relief valve 6, and an exhaust valve 5. The pressure gauge 9 is used to display the system pressure in real time; it is preferably a mechanical pressure gauge, but an electronic pressure sensor can also be used. The safety relief valve 6 automatically opens to release pressure when the system pressure exceeds a set value, preventing overpressure operation and ensuring safety. The exhaust valve 5 is used to release gas from the system during filling and pressurization, preventing cavitation or air resistance from affecting test accuracy.

[0053] The connecting device includes a pipeline 3, a ball valve assembly 2, and a three-way valve assembly 7. Pipeline 3 connects the various components to form a circulation loop. Ball valve assembly 2 controls the on / off state of the pipeline and regulates flow. Three-way valve assembly 7 is used to switch between different pipelines and is the core component for system mode switching. Ball valve assembly 2 includes a first ball valve, a second ball valve, and a third ball valve, while three-way valve assembly 7 includes a first three-way valve and a second three-way valve.

[0054] The specific pipe connection relationships are as follows:

[0055] An open-top water tank 1 is connected sequentially to a first ball valve, a first three-way valve, and a second ball valve via pipe 3 to the inlet of the test component 4. The test component 4 is the liquid-cooled unit to be tested. The outlet of the test component 4 is connected sequentially to a third ball valve and a second three-way valve, forming two branches: one branch connects to the open-top water tank 1 via pipe 3, and the other branch connects to the inlet of pressure tank 11 via pipe 3. The outlet of pressure tank 11 is connected to the first three-way valve via a PTC water heater 8. A safety relief valve 6 and an air vent valve 5 are installed on pipe 3 between the outlet of the test component 4 and the second three-way valve. A pressure gauge 9 is installed on pipe 3 at the outlet of pressure tank 11 to monitor the pressure in the closed loop. A temperature display 10 is installed at the outlet of the PTC water heater 8 to monitor the temperature of the heated medium.

[0056] The testing system of the present invention has two working modes: open circuit test mode and closed circuit pressure holding test mode.

[0057] like Figure 3 As shown, in open-circuit test mode, the first three-way valve connects the open-type water tank 1 to the inlet end of the test component 4, and the second three-way valve connects the outlet end of the test component 4 to the open-type water tank 1. At this time, the test medium flows sequentially through the open-type water tank 1, the first ball valve, the first three-way valve, the second ball valve, the test component 4, the third ball valve, and the second three-way valve before returning to the open-type water tank 1, forming an open-circuit loop. In this mode, the system operates at atmospheric pressure and is suitable for basic performance testing of liquid-cooled units, such as flow rate testing and heat exchange performance testing at atmospheric pressure.

[0058] When a pressure holding test is required, the system switches from open circuit test mode to closed circuit pressure holding test mode. This switching process includes a pressurization phase and a pressure holding phase.

[0059] like Figure 4 As shown, during the pressurization phase, the first three-way valve and the second three-way valve are in the state where the pressure tank 11 is connected to the system and connected to the open-top water tank 1. At this time, the test medium flows out from the open-top water tank 1, enters the pressure tank 11 through the first three-way valve, and the gas in the pressure tank 11 is discharged through the exhaust valve 5. As the medium is continuously added, the system pressure gradually rises. The operator monitors the system pressure in real time through the pressure gauge 9. When the pressure rises to the preset 1.2 bar, the exhaust valve 5 is closed, and the pressurization phase is completed.

[0060] like Figure 5 As shown, during the pressure holding stage, the passages connecting the first three-way valve and the second three-way valve to the open-type water tank 1 are closed, allowing the test medium to circulate only between the pressure tank 11, the PTC water heater 8, the first three-way valve, the second ball valve, the test component 4, the third ball valve, and the second three-way valve, forming a closed-loop pressure holding circuit isolated from the open-type water tank 1. At this time, the system pressure stabilizes at approximately 1.2 bar, allowing for performance testing of the test component 4 under pressurized conditions, such as sealing performance testing and pressure bearing performance testing.

[0061] During the closed-circuit pressure holding test, if the medium temperature is lower than the set value, the PTC water heater 8 can be turned on to heat the medium. The temperature display 10 shows the medium temperature in real time. When the temperature reaches the set value, the power of the PTC water heater 8 can be turned off or reduced to achieve precise temperature control. In this way, the system can maintain a stable medium temperature while holding pressure, without relying on external heating equipment, ensuring the continuity of long-term testing.

[0062] To ensure safe system operation, the opening pressure of safety relief valve 6 is set to 2.5 bar. When the system pressure exceeds 2.5 bar for any reason, safety relief valve 6 will automatically open to release the excess pressure and prevent system overpressure damage.

[0063] When the test is completed and the test piece 4 needs to be disassembled, first close the ball valve assembly 2 at the inlet and outlet ends of the test piece 4, and then operate the three-way valve assembly 7 to disconnect the test piece 4 from the system. At this time, the test medium in the pipeline has been effectively isolated, and disconnecting the pipeline will not cause a large amount of medium leakage, which ensures operational safety and avoids waste of resources.

[0064] Example 2

[0065] Based on Embodiment 1, this embodiment optimizes the structure of the pressure tank 11. The pressure tank 11 can be replaced by a bladder-type pressure stabilizing tank instead of a rigid liquid storage tank. The bladder-type pressure stabilizing tank has a rubber bladder inside, pre-filled with compressed gas (such as nitrogen). When the system pressure increases, the bladder is compressed, absorbing pressure fluctuations; when the system pressure decreases, the bladder expands, releasing the stored energy. This structure has a stronger ability to absorb pressure fluctuations, enabling more stable system pressure.

[0066] Example 3

[0067] Based on Embodiment 1, this embodiment optimizes the system's control method. Ball valve assembly 2 can be replaced with an electric valve or a solenoid valve, and three-way valve assembly 7 can be replaced with an electric three-way valve. The system is also equipped with a PLC controller, which is connected to the electric valve, solenoid valve, electric three-way valve, temperature digital display 10, and pressure gauge 9. The PLC controller enables automatic switching between open-circuit test mode and closed-circuit pressure holding test mode, as well as automatic temperature and pressure control. For example, a test procedure can be preset, and the PLC controller automatically completes steps such as venting, pressurizing, holding pressure, recording data, and depressurizing, improving test consistency and automation.

[0068] Example 4

[0069] Based on Embodiment 1, this embodiment adds pressure monitoring and alarm functions. Pressure gauge 9 uses an electronic pressure sensor, which can convert pressure signals into electrical signals and transmit them to the control system. The system is also equipped with an audible and visual alarm device. When the system pressure exceeds a preset threshold (e.g., 2.2 bar, slightly lower than the opening pressure of the safety relief valve), the alarm device emits an audible and visual alarm signal to remind the operator to take timely action and prevent the pressure from continuing to rise and causing the safety relief valve to open.

[0070] Example 5

[0071] Based on Example 1, this example further optimizes the leak-proof disassembly mechanism. The inlet and outlet ends of the tested component 4 are equipped with quick-connect fittings with self-sealing functions. These quick-connect fittings contain a self-sealing valve core. In the normal connection state, the valve core is opened, allowing normal medium flow; when disconnected, the valve core automatically resets, cutting off the internal passage. Disassembling the tested component 4 only requires pulling out the quick-connect fitting, achieving immediate disconnection without relying on system valves, effectively preventing medium leakage and further improving operational safety and convenience.

[0072] Example 6

[0073] Based on Embodiment 1, this embodiment integrates and optimizes the media storage device. The open-top water tank 1 and the pressure tank 11 are integrated into a single pressurized water tank. The interior of this single pressurized water tank is divided into an atmospheric pressure zone and a pressurized zone by a partition or air cushion. The atmospheric pressure zone functions the same as the open-top water tank, used for storing atmospheric pressure media and replenishing the liquid; the pressurized zone functions the same as the pressure tank, used to provide the pressure required for testing. This integrated structure reduces piping connection points, lowers the risk of leakage, and makes the system more compact, saving installation space.

[0074] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0075] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

Claims

1. A liquid-cooled unit open / closed testing system, characterized in that, Medium storage device, heating device, safety device and connecting device; The medium storage device includes an open water tank (1) and a pressure tank (11). The heating device includes a PTC water heater (8) and a temperature digital display (10); The safety device includes a pressure gauge (9), a safety relief valve (6), and an exhaust valve (5); The connecting device includes a pipeline (3), a ball valve assembly (2), and a three-way valve assembly (7); wherein the ball valve assembly (2) includes a first ball valve, a second ball valve, and a third ball valve, and the three-way valve assembly (7) includes a first three-way valve and a second three-way valve; The open-type water tank (1) is connected in sequence to the first ball valve, the first three-way valve, and the second ball valve through the pipeline (3) to the inlet end of the test piece (4); The outlet end of the tested component (4) is connected in sequence to the third ball valve and the second three-way valve, and then connected to the inlet end of the open water tank (1) and the pressure tank (11) through pipelines (3); The outlet end of the pressure tank (11) is connected to the first three-way valve through the PTC water heater (8); The safety relief valve (6) and the exhaust valve (5) are installed on the pipeline (3) between the outlet end of the tested component (4) and the second three-way valve; The pressure gauge (9) is installed on the pipeline (3) at the outlet end of the pressure tank (11); The temperature display (10) is installed at the outlet end of the PTC water heater (8) to monitor the temperature of the medium after heating.

2. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The system has an open-circuit test mode and a closed-circuit voltage holding test mode; In the open-circuit test mode, the first three-way valve connects the open water tank (1) to the inlet end of the test piece (4), and the second three-way valve connects the outlet end of the test piece (4) to the open water tank (1). The test medium flows through the open water tank (1), the first ball valve, the first three-way valve, the second ball valve, the test piece (4), the third ball valve, and the second three-way valve in sequence and then returns to the open water tank (1), forming an open-circuit loop. In the closed-loop pressure holding test mode, the first three-way valve connects the pressure tank (11) to the inlet end of the test piece (4) via the PTC water heater (8), and the second three-way valve connects the outlet end of the test piece (4) to the inlet end of the pressure tank (11). The test medium flows sequentially through the pressure tank (11), PTC water heater (8), first three-way valve, second ball valve, test piece (4), third ball valve, and second three-way valve before returning to the pressure tank (11), forming a closed-loop pressure holding circuit isolated from the open water tank.

3. The liquid-cooled unit open / closed test system according to claim 2, characterized in that, The process of switching from open-circuit test mode to closed-circuit pressure holding test mode includes a pressure application phase and a pressure holding phase. Pressurization stage: The first three-way valve and the second three-way valve are in the state of connecting the pressure tank (11) to the system and communicating with the open water tank (1). The system is filled with liquid and pressurized through the pressure tank (11), and the gas in the system is discharged through the exhaust valve (5) until the system pressure reaches the preset pressure value. Pressure holding stage: Close the passages in the first three-way valve and the second three-way valve that are connected to the open water tank (1), so that the test medium circulates only between the pressure tank (11), the PTC water heater (8), the first three-way valve, the ball valve, and the test piece (4), forming a closed pressure holding test circuit.

4. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The opening pressure of the safety relief valve (6) is set to 2.5 bar. When the system pressure exceeds 2.5 bar, it will automatically open to relieve pressure. The system working pressure in the closed-loop pressure holding test mode is 1.2 bar.

5. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The PTC water heater (8) has a temperature self-regulation function. It automatically heats when the medium temperature is lower than the set temperature and automatically stops heating when the medium temperature reaches the set temperature. The temperature display (10) displays the temperature value of the medium in real time.

6. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The pressure tank (11) is a rigid liquid storage tank or a bladder-type pressure stabilizing tank; when a bladder-type pressure stabilizing tank is used, the tank is pre-filled with compressed gas, and the pressure is buffered and stabilized by the compression and expansion of the bladder.

7. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The ball valve assembly (2) is replaced with an electric valve or a solenoid valve, and the three-way valve assembly (7) is replaced with an electric three-way valve; the system also includes a PLC controller, which is connected to the electric valve, the solenoid valve, the electric three-way valve, the temperature display (10) and the pressure gauge (9) to realize the automatic switching between open circuit test mode and closed circuit pressure holding test mode, as well as the automatic control of temperature and pressure.

8. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The pressure gauge (9) is an electronic pressure sensor, and the system also includes an alarm device; when the system pressure exceeds a preset threshold, the alarm device emits an audible and visual alarm signal.

9. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The inlet and outlet ends of the test piece (4) are respectively equipped with quick connectors with self-sealing function, which are used to automatically cut off the medium passage when the test piece (4) is disassembled to prevent medium leakage.

10. The liquid-cooled unit open / closed test system according to claim 1, characterized in that, The open-type water tank (1) and the pressure tank (11) are integrated into a single pressurized water tank. The interior of the single pressurized water tank is divided into an atmospheric pressure zone and a pressurized zone by a partition. The atmospheric pressure zone has the same function as the open-type water tank, and the pressurized zone has the same function as the pressure tank.

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