Phase change heat dissipation system with stable performance

Abstract

The utility model relates to the field of liquid cooling, and particularly discloses a phase change heat dissipation system with stable performance, which comprises a liquid cooling box, the liquid cooling box is of a closed structure, and a phase change liquid is stored in the liquid cooling box; the first cooler is provided with a first inlet pipe and a first outlet pipe, one end of the first inlet pipe and one end of the first outlet pipe extend into the liquid cooling box in a sealed mode, and an inlet of the first inlet pipe is higher than the liquid level of the phase change liquid so that the first inlet pipe and the phase change liquid can be arranged at intervals; the second radiator is provided with a second inlet pipe and a second outlet pipe, and the second inlet pipe is connected with the first outlet pipe; and the three-way switching valve is arranged at the joint of the second inlet pipe and the first outlet pipe and is used for switching the phase change liquid to flow out of the first outlet pipe or flow into the second inlet pipe. By the adoption of the technical scheme, under the normal condition, only the first radiator is used for working, and heat dissipation can be improved according to needs through switching of the three-way switching valve.

Description

Technical Field

[0001] The present application relates to the field of liquid cooling and heat dissipation, and in particular to a phase change heat dissipation system with stable performance. Background Art

[0002] The CPU and other components of a computer will generate heat during high-speed operation. Heat dissipation is actually a heat transfer process, the purpose of which is to transfer the heat generated by the CPU to other media and control the CPU temperature within a stable range. According to the living environment, the heat of the CPU will eventually dissipate into the air. This process is computer heat dissipation.

[0003] Radiators are divided into active radiators and passive radiators. Passive radiators mainly rely on the heat conduction of the material itself, and their efficiency is generally not enough to meet the requirements. Therefore, the mainstream radiators on the market are active radiators.

[0004] Active radiator product types include: air cooling, liquid cooling, dry ice, liquid nitrogen and compressor cooling. The traditional mainstream method is air cooling. Since air cooling has low cost, but the air cooling effect is insufficient, high-end chassis now generally use liquid cooling. Liquid cooling is divided into immersion type, spray type and water cooling head method.

[0005] The technical problem of the present application is mainly aimed at the immersion liquid cooling method. The existing immersion cooling mainly circulates the coolant by pumping it into the radiator for circulation. However, due to the certain heat dissipation efficiency of the radiator, its heat dissipation performance decreases when the external ambient temperature is high in summer. Summary of the invention

[0006] In order to improve the above problems, the present application provides a phase change heat dissipation system with stable performance.

[0007] The present application provides a phase change heat dissipation system with stable performance, which adopts the following technical solution:

[0008] A phase change heat dissipation system with stable performance, comprising:

[0009] A liquid cooling box, the liquid cooling box is a closed structure and stores phase change liquid inside;

[0010] The first cold row has a first inlet pipe and a first outlet pipe, one end of each of the first inlet pipe and the first outlet pipe is sealed and extends into the liquid cooling box, and the inlet of the first inlet pipe is higher than the liquid level of the phase change liquid so that the first inlet pipe is spaced apart from the phase change liquid;

[0011] The second cold row has a second inlet pipe and a second outlet pipe, and the second inlet pipe is connected to the first outlet pipe;

[0012] The three-way switching valve is installed at the connection between the second inlet pipe and the first outlet pipe, and is used to switch the phase change liquid to flow out from the first outlet pipe or flow into the second inlet pipe.

[0013] By adopting the above technical solution, under normal circumstances, only the first cold row is used for work, and the phase change liquid evaporates and enters the first cold row from the first inlet pipe, and then flows back to the liquid cooling box from the first outlet pipe; when the temperature is too high, by switching the three-way switching valve, the phase change liquid is controlled to flow out of the first cold row through the second inlet pipe and enter the second cold row, and finally flows back to the liquid cooling box from the second outlet pipe.

[0014] Optionally, the three-way switching valve is a solenoid valve or a pneumatic valve, a sensor is provided in the liquid cooling box, and the phase change heat dissipation system also includes a controller, which controls the three-way switching valve to allow phase change liquid to flow in from the second inlet pipe when the sensor exceeds a threshold value.

[0015] By adopting the above technical solution, by setting the three-way switching valve to electric or pneumatic, manual operation is not required, which is more convenient.

[0016] Optionally, the sensor includes at least one of a temperature sensor and a pressure sensor.

[0017] By adopting the above technical solution, you can choose according to your needs. For high-end configuration, you can choose both, and for low-end configuration, you can choose one.

[0018] Optionally, a safety valve is installed on the liquid cooling box.

[0019] By adopting the above technical solution, since the gasification of the phase change liquid will cause the internal pressure of the liquid cooling box to increase, which may cause the coolant to leak, it is necessary to set a safety valve.

[0020] Optionally, a liquid level meter is installed in the liquid cooling box, and the phase change heat dissipation system also includes a liquid replenishing tank and a controller. When the liquid level of the phase change liquid is lower than a set value, the controller controls the liquid replenishing tank to replenish water into the liquid cooling box.

[0021] By adopting the above technical solution, when the second cold row is suddenly connected, the circulation time becomes longer and there is a possibility of insufficient coolant in the liquid cooling box. Therefore, a liquid replenishing tank is provided. Since the phase change liquid in the liquid replenishing tank is in a cooled state and its temperature is lower than that of the phase change liquid in the liquid cooling box, it can also play an appropriate cooling role.

[0022] Optionally, the liquid replenishing tank is connected to the liquid cooling tank via a two-way pipe, and a reflux pump is installed on the two-way pipe.

[0023] By adopting the above technical solution, since the phase change liquid in the liquid replenishing tank flows into the liquid cooling tank, when the phase change liquid flows back, the liquid level in the liquid cooling tank rises, so a reflux pump needs to be provided for reflux.

[0024] Optionally, the phase change heat dissipation system further includes a chassis, the liquid replenishing tank is mounted on the chassis, a fan is installed in the chassis, and an air outlet of the fan faces the liquid replenishing tank.

[0025] By adopting the above technical solution, the fan can not only assist in cooling the radiator, but also cool the liquid replenishment tank.

[0026] Optionally, the first cold row and the second cold row have at least one row of fans, and when there is only one row of fans, the fans are located below the first cold row and the second cold row.

[0027] By adopting the above technical solution and using a fan with adjustable power, when two radiators are used together, the filtering effect can be increased, and only one row of fans is provided to save space.

[0028] Optionally, the liquid replenishing tank is U-shaped when viewed from a top view.

[0029] By adopting the above technical solution, the wind from the fan can flow through the U-shaped opening, with a large contact area and fast heat dissipation.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: by providing the first cooling row, the second cooling row and the three-way switching valve, the heat dissipation can be improved as needed. By providing a safety valve, the overall safety is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application, with part of the side wall of the chassis hidden for easy observation;

[0032] Figure 2 2 is a cross-sectional view of a liquid cooling box in an embodiment.

[0033] Figure numerals: 1. liquid cooling box; 11. safety valve; 2. first radiator; 21. first inlet pipe; 211. expansion structure; 22. first outlet pipe; 3. second radiator; 31. second inlet pipe; 32. second outlet pipe; 4. three-way switching valve; 5. pressure sensor; 6. controller; 71. first fan; 72. second fan; 8. liquid replenishing tank; 81. two-way pipe; 82. reflux pump; 83. solenoid valve; 9. chassis; 10. liquid level meter. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-2 This application is described in further detail.

[0035] The embodiment of the present application discloses a phase-change heat dissipation system with stable performance, including a liquid cooling box 1, a first cold row 2, a second cold row 3, and a three-way switching valve 4.

[0036] The liquid cooling box 1 is a closed structure. Specifically, the liquid cooling box 1 is divided into a box body and a box cover. A sealing ring is arranged between the box body and the box cover. The box cover is connected to the box body by screws to form a closed structure. The liquid cooling box 1 stores phase change liquid inside. The phase change liquid is generally a fluorinated liquid.

[0037] The first cold row 2 has a first inlet pipe 21 and a first outlet pipe 22. The first inlet pipe 21 and the first outlet pipe 22 are both sealed and extend into the liquid cooling box 1 at one end, and the inlet of the first inlet pipe 21 is higher than the liquid level of the phase change liquid so that the first inlet pipe 21 is spaced apart from the phase change liquid. In order to facilitate the gasification of the phase change liquid to enter, one end of the first inlet pipe 21 extending into the liquid cooling box 1 is a flared structure 211.

[0038] The second cold row 3 has a second inlet pipe 31 and a second outlet pipe 32, and the second inlet pipe 31 is connected to the first outlet pipe 22; the three-way switching valve 4 is installed at the connection between the second inlet pipe 31 and the first outlet pipe 22, and is used to switch the phase change liquid out of the first outlet pipe 22 or into the second inlet pipe 31. The three-way switching valve 4 can generally be a manual valve, a solenoid valve 83 or a pneumatic valve. In order to be more intelligent, it generally selects a pneumatic valve or a solenoid valve 83. A controller 6 and a sensor are provided to match it. Among them, the sensor is generally selected as a temperature sensor and a pressure sensor 5. In this solution, only the pressure sensor 5 is provided. When the pressure in the liquid cooling box 1 exceeds the normal pressure of 15 kpa, the controller 6 controls the three-way switching valve 4 to switch so that the first outlet pipe 22 and the second inlet pipe 31 are connected. The phase change liquid does not come out from the first outlet pipe 22, but enters the second cooling row 3 through the second inlet pipe 31 and flows out from the second outlet pipe 32. When the pressure does not exceed the normal pressure of 15 kpa, the vaporized phase change liquid flows in from the first inlet pipe 21, passes through the first cooling row 2, and flows out from the first outlet pipe 22. When the temperature sensor is selected, the temperature threshold can be set to 60 degrees Celsius, and the three-way switching valve 4 is switched when it exceeds 60 degrees Celsius.

[0039] In the above solution, in order to prevent the pressure sensor 5 from obstructing the flow of the phase-change liquid gas, a groove is formed on the box cover to accommodate the pressure sensor 5.

[0040] The expansion structure 211 of the first inlet pipe 21 is similar to a bell mouth and has a guiding function, but it is not a bell mouth due to the limitation of the second outlet pipe 32. In order to further facilitate the gasification and inflow of the phase change liquid, the present application opens a receiving groove in the box cover with the same shape and size as the expansion structure 211. Of course, in some cases, the receiving groove can also be directly used as a guide, omitting the expansion structure 211.

[0041] A safety valve 11 is also installed on the liquid cooling box 1, and the pressure relief pressure of the safety valve 11 exceeds the normal pressure by 25 kpa. In addition, a one-way air intake valve that can be used to intake air from the outside can be set on the liquid cooling box 1 to intake air when the pressure in the liquid cooling box 1 is too low (lower than the normal pressure of 25 kpa). The above-mentioned normal pressure can be understood as standard atmospheric pressure.

[0042] The above-mentioned radiator may not include a fan (under the condition of good heat dissipation), but only include copper tubes and heat dissipation fins. However, in general, all radiators are equipped with fans. In this solution, the first radiator 2 and the second radiator 3 are arranged up and down. In order to save volume, only one row of fans (called the first fan 71) can be set, which is located below the first radiator 2 and the second radiator 3. In other solutions, a row of fans can be set below the first radiator 2 and below the second radiator 3, and in this case, the first radiator 2 and the second radiator 3 can be staggered as much as possible, such as setting the first radiator 2 above the liquid cooling box 1 and the second radiator 3 on the side of the liquid cooling box 1.

[0043] In other embodiments, a liquid replenishing tank 8 can be additionally installed on the basis of the above, and the liquid replenishing tank 8 is connected to the liquid cooling tank 1 through a two-way pipe 81, and a reflux pump 82 is installed on the two-way pipe 81. A solenoid valve 83 is installed at one end of the two-way pipe 81 close to the liquid replenishing tank 8. A liquid level gauge 10 is installed in the liquid cooling tank 1, and a float type liquid level gauge can be selected. When the liquid level drops to the set value, the controller 6 opens the solenoid valve 83 (normally closed), and the phase change liquid flows into the liquid cooling tank 1 from the two-way pipe 81 by gravity. When the liquid level in the liquid cooling tank 1 is too high, the controller 6 controls the reflux pump 82 and the solenoid valve 83 to allow the liquid to flow back to the liquid replenishing tank 8.

[0044] In other embodiments, the liquid cooling box 1 is generally placed in a chassis 9, and a heat dissipation hole is provided on the chassis 9. The liquid replenishing box 8 is installed on the chassis 9, and the liquid replenishing box 8 is U-shaped from a top view. A fan (referred to as a second fan 72) is installed in the chassis 9, and the air outlet of the second fan 72 faces the liquid replenishing box 8.

[0045] In other embodiments, water pumps may also be installed on the first outlet pipe 22 and the second outlet pipe 32 to facilitate rapid reflux of the phase-change liquid.

[0046] The controller 6 mentioned above is generally integrated into one, but can also be provided separately.

[0047] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0048] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0049] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A phase change heat dissipation system with stable performance, characterized by: include A liquid cooling box, wherein the liquid cooling box is a closed structure and stores phase change liquid inside; The first cold row has a first inlet pipe and a first outlet pipe, one end of each of the first inlet pipe and the first outlet pipe is sealed and extends into the liquid cooling box, and the inlet of the first inlet pipe is higher than the liquid level of the phase change liquid so that the first inlet pipe is spaced apart from the phase change liquid; The second cold row has a second inlet pipe and a second outlet pipe, and the second inlet pipe is connected to the first outlet pipe; The three-way switching valve is installed at the connection between the second inlet pipe and the first outlet pipe, and is used to switch the phase change liquid to flow out from the first outlet pipe or flow into the second inlet pipe.

2. A phase change heat dissipation system with stable performance according to claim 1, characterized in that: The three-way switching valve is a solenoid valve or a pneumatic valve. A sensor is arranged in the liquid cooling box. The phase change heat dissipation system also includes a controller. When the sensor exceeds a threshold value, the controller controls the three-way switching valve so that the phase change liquid flows in from the second inlet pipe.

3. A phase change heat dissipation system with stable performance according to claim 2, characterized in that: The sensor includes at least one of a temperature sensor and a pressure sensor.

4. A phase change heat dissipation system with stable performance according to claim 1, characterized in that: A safety valve is installed on the liquid cooling box.

5. A phase change heat dissipation system with stable performance according to claim 1, characterized in that: A liquid level meter is installed in the liquid cooling box. The phase change heat dissipation system also includes a liquid replenishing tank and a controller. When the liquid level of the phase change liquid is lower than a set value, the controller controls the liquid replenishing tank to replenish water to the liquid cooling box.

6. A phase change heat dissipation system with stable performance according to claim 5, characterized in that: The liquid replenishing tank is connected with the liquid cooling tank through a two-way pipe, and a reflux pump is installed on the two-way pipe.

7. A phase change heat dissipation system with stable performance according to claim 6, characterized in that: The phase change heat dissipation system also includes a chassis, the liquid replenishing tank is installed on the chassis, a fan is installed in the chassis, and the air outlet of the fan faces the liquid replenishing tank.

8. A phase change heat dissipation system with stable performance according to claim 1, characterized in that: The first cold row and the second cold row have at least one row of fans, and when there is only one row of fans, it is located below the first cold row and the second cold row.

9. A phase change heat dissipation system with stable performance according to claim 5, characterized in that: The liquid replenishing tank is U-shaped when viewed from above.

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