Liquid nitrogen cooling immersed server heat dissipation device

Abstract

The utility model discloses a liquid nitrogen cooling immersed type server heat dissipation device, which relates to the technical field of servers, and comprises a casing, a liquid outlet arranged on the surface of the casing and an opening and closing plate arranged on the top of the casing, a rack is fixedly arranged in the casing, a server is arranged in the rack, and a backflow assembly is arranged on the top of the rack; and the backflow assembly comprises a controller and a spraying head installed at the bottom of the controller, one side of the controller is fixedly connected with a conveying pipe, and the end, away from the controller, of the conveying pipe is fixedly connected with an air suction pipe. According to the utility model, the temperature sensor is arranged, and the spraying flow is dynamically adjusted according to the temperature, so that not only is the operation of the equipment in a proper temperature range ensured, but also potential risks caused by energy waste and supercooling are avoided, and the stability and safety of the operation of the equipment and the energy utilization efficiency are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of server technology, specifically to a liquid nitrogen-cooled immersion server heat dissipation device. Background Technology

[0002] Immersion liquid cooling technology completely submerges the server in coolant, utilizing the excellent thermal conductivity of liquid to directly remove the heat generated by the server, resulting in advantages such as high heat dissipation efficiency, low energy consumption, and low noise.

[0003] Liquid nitrogen has an extremely low temperature (boiling point of -196℃) and a high latent heat of vaporization, enabling it to absorb a large amount of heat and providing strong cooling capabilities. Furthermore, liquid nitrogen is a relatively clean, safe, and inexpensive cooling medium with a wide range of sources, making it an ideal choice for immersion server cooling.

[0004] An existing patent (authorization announcement number: CN222653369U) discloses a liquid nitrogen-cooled immersion server heat dissipation system. The key technical point is that by using vacuum pipes to transport liquid nitrogen, liquid nitrogen loss and condensation along the pipes can be effectively reduced. In this invention, a heat exchanger is installed inside the server rack; the rack is welded to ensure that the coolant inside does not leak. This invention has many advantages, including simple and reasonable structure, convenient installation and use, safety and efficiency, and energy saving and environmental protection.

[0005] However, the above technical solutions still have certain drawbacks. Using vacuum pipes to transport liquid nitrogen reduces the loss of liquid nitrogen, but the liquid nitrogen vaporizes after being heated. The vaporized liquid nitrogen cannot be recycled and reused, so the utilization efficiency of liquid nitrogen cannot be fully utilized when it is used as a coolant. Therefore, an immersion server heat dissipation device with liquid nitrogen cooling is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a liquid nitrogen-cooled immersion server heat dissipation device to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A liquid nitrogen-cooled immersion server heat dissipation device includes a housing, a liquid outlet on the surface of the housing, and a hinged plate on the top of the housing. A rack is fixedly installed inside the housing, a server is installed inside the rack, and a return flow assembly is provided on the top of the rack.

[0009] The reflux assembly includes a controller and a spray head installed at the bottom of the controller. A delivery pipe is fixedly connected to one side of the controller, and an air suction pipe is fixedly connected to the end of the delivery pipe away from the controller. A liquid nitrogen pump is fixedly installed on the inner wall of the controller, and a vaporization chamber is also installed on the inner wall of the controller. The vaporization chamber and the liquid nitrogen pump are placed separately, and a solenoid valve is provided at the separation point between the vaporization chamber and the liquid nitrogen pump.

[0010] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0011] In an alternative embodiment of a liquid nitrogen-cooled immersion server heat dissipation device: two sets of delivery pipes are mirror-image arranged along the short side of the chassis, and three sets of suction pipes are arranged. The spacing between any two sets of suction pipes is equal. The suction pipes are connected to the delivery pipes, and the suction pipes and delivery pipes cover the outer wall of the rack.

[0012] In one option of a liquid nitrogen-cooled immersion server heat dissipation device: the rack surface has multiple sets of holes with equal diameters between the holes.

[0013] In one alternative embodiment of a liquid nitrogen-cooled immersion server heat dissipation device: a temperature controller is installed on the outer wall of the controller, and the temperature controller is electrically connected to the liquid nitrogen pump.

[0014] In one alternative solution for a liquid nitrogen-cooled immersion server heat dissipation device: the top of the rack is provided with six diverter plates, each diverter plate is inclined to the top of the rack, and one side of the diverter plate is provided with multiple diverter curves.

[0015] In one option of a liquid nitrogen-cooled immersion server heat dissipation device: the diameter of the spray head is equal to the length of the short side of the rack.

[0016] In one alternative solution for a liquid nitrogen-cooled immersion server heat dissipation device: a separate auxiliary sprayer is also provided on the side of the spray head, and the auxiliary sprayer is electrically connected to a temperature sensor.

[0017] In one alternative solution for a liquid nitrogen-cooled immersion server heat dissipation device: the inner wall of the casing is provided with a thermal insulation layer, and the thermal insulation layer is made of aerogel.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. By setting up a reflux component, after liquid nitrogen absorbs gas, the liquid nitrogen body vaporizes and is absorbed by the suction pipe, so that liquid nitrogen can be recycled after heat absorption, thus achieving efficient recycling of liquid nitrogen.

[0020] 2. By setting up a flow divider and a temperature sensor, this utility model dynamically adjusts the spray flow rate according to the temperature, which not only ensures that the equipment operates within a suitable temperature range, but also avoids energy waste and potential risks caused by excessive cooling, thus greatly improving the stability, safety and energy efficiency of the equipment operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the recirculation assembly of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the flow divider of this utility model;

[0025] Figure 5 This is a schematic diagram of the principle of the recirculation component of this utility model;

[0026] Figure 6 This is a schematic diagram of the controller of this utility model.

[0027] Attached diagram annotations: 1. Housing; 2. Liquid outlet; 3. Opening / closing plate; 4. Insulation layer; 5. Frame; 6. Reflux assembly; 7. Diverter plate;

[0028] 61. Controller; 62. Suction pipe; 63. Delivery pipe; 64. Spray head; 611. Liquid nitrogen pump; 612. Vaporization chamber; 613. Solenoid valve. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In one embodiment, such as Figures 1-6 As shown, a liquid nitrogen-cooled immersion server heat dissipation device includes: a housing 1, a liquid outlet 2 opened on the surface of the housing 1, and a hinged plate 3 set on the top of the housing 1. A rack 5 is fixedly installed inside the housing 1, and a server is installed inside the rack 5. A return flow assembly 6 is provided on the top of the rack 5.

[0031] In this embodiment, the opening and closing plate 3 is opened, the server is fixed in the rack 5 after being treated with anti-condensation, the liquid ammonia pipeline and the temperature sensor cable are connected, the opening and closing plate 3 is closed, and then the casing 1 is evacuated and liquid ammonia is injected until it is 50% submerged in the rack 5. The liquid nitrogen vapor is converted into liquid nitrogen through the reflux component 6 and recycled to save liquid nitrogen energy.

[0032] In one embodiment, such as Figure 2 As shown, the surface of the rack 5 has multiple sets of holes with equal diameters. The holes can provide a path for internal wiring and pipe laying. At the same time, the holes can also serve as channels for airflow or fluid, promoting air circulation or fluid exchange and ensuring that the server operates stably in a suitable temperature and fluid environment.

[0033] In one embodiment, such as Figure 2 As shown, the inner wall of the housing 1 is provided with a heat insulation layer 4, and the heat insulation layer 4 is made of aerogel. Aerogel is a material with a nanoporous structure and extremely high internal porosity, which greatly suppresses the convective heat transfer of air in it, and can significantly improve the thermal insulation performance of the equipment, reduce energy consumption, and improve the stability and reliability of the equipment operation.

[0034] In one embodiment, such as Figure 2 , Figure 3 as well as Figure 5 As shown, the recirculation assembly 6 includes a controller 61 and a spray head 64 installed at the bottom of the controller 61. A delivery pipe 63 is fixedly connected to one side of the controller 61, and a suction pipe 62 is fixedly connected to the end of the delivery pipe 63 away from the controller 61. A liquid nitrogen pump 611 is fixedly installed on the inner wall of the controller 61, and a vaporization chamber 612 is also installed on the inner wall of the controller 61. The vaporization chamber 612 and the liquid nitrogen pump 611 are placed separately, and a solenoid valve 613 is provided at the separation point between the vaporization chamber 612 and the liquid nitrogen pump 611. The spray head 64 is installed at the bottom of the controller 61. In the liquid nitrogen recycling process, the treated liquid nitrogen will be sprayed out through the spray head 64, so that the liquid nitrogen is distributed in the CPU area of ​​the server, thereby effectively absorbing heat, reducing the temperature of the area, and achieving precise cooling of the critical parts of the server.

[0035] One end of the delivery pipe 63 is fixedly connected to the controller 61, and the other end is connected to the suction pipe 62. The surface of the suction pipe 62 has pores to absorb heat and raise the temperature of the gaseous nitrogen. This gaseous nitrogen enters the delivery pipe 63 through the suction pipe 62 and is then transported to the controller 61 for circulation. Inside the controller 61, the liquid nitrogen pump 611 compresses the gaseous nitrogen, increasing its pressure and temperature. This is because, according to the physical properties of gases, under certain conditions, gas compression can increase its temperature and pressure, making the gaseous nitrogen easier to liquefy. The high-temperature, high-pressure gaseous nitrogen, compressed by the liquid nitrogen pump 611, enters the vaporization chamber 612 under the control of the solenoid valve 613. The solenoid valve 613 precisely controls the gas flow rate and direction. It can open or close in a timely manner according to the instructions issued by the controller 61, ensuring that the amount of gaseous nitrogen entering the vaporization chamber 612 matches the current operating requirements of the equipment. The vaporization chamber 612 utilizes its own heat dissipation structure to dissipate the heat from the high-temperature, high-pressure gaseous nitrogen, gradually cooling and liquefying it. During this process, the vaporization chamber 612 exchanges heat with the external environment, transferring heat to the surrounding environment to achieve the transformation of gaseous nitrogen into liquid nitrogen. This prepares the liquid nitrogen for recycling. Through the reflux component 6, the liquid nitrogen can be recycled after absorbing heat, achieving efficient recycling of liquid nitrogen.

[0036] In one embodiment, such as Figure 2 As shown, two sets of conveying pipes 63 are mirror-image arranged along the short side of the housing 1, and three sets of suction pipes 62 are arranged. The spacing between any two sets of suction pipes 62 is equal. The suction pipes 62 are connected to the conveying pipes 63, and the suction pipes 62 and the conveying pipes 63 cover the outer wall of the frame 5. By setting suction pipes 62 on both sides, the pressure value inside the housing 1 tends to be stable. At the same time, during the suction process, air is drawn from both sides to improve the conversion efficiency of liquid nitrogen after endothermic vaporization.

[0037] In one embodiment, such as Figure 2 As shown, the diameter of the spray head 64 is equal to the length of the short side of the rack 5, which can spray the servers inside the rack 5 evenly.

[0038] In one embodiment, such as Figure 6 As shown, a temperature sensor is installed on the outer wall of the controller 61. The temperature sensor is electrically connected to the liquid nitrogen pump 611. A separate auxiliary sprayer is also provided on the side of the spray head 64. The auxiliary sprayer is electrically connected to the temperature sensor. The temperature sensor is installed on the outer wall of the controller 61. Its core function is to monitor the temperature of a specific area inside the equipment in real time. When the temperature sensor detects a change in the temperature inside the equipment, it will quickly transmit the temperature signal to the liquid nitrogen pump 611 connected to it.

[0039] A separate auxiliary sprayer is installed on the side of spray head 64 to further optimize the cooling effect of the equipment in different temperature ranges. The auxiliary sprayer is electrically connected to a temperature sensor and can automatically adjust its operating status based on the temperature data fed back by the sensor. When the temperature sensor detects that the internal temperature of the equipment is greater than -150℃, this indicates that the internal temperature has deviated from the ideal low-temperature operating range of the liquid nitrogen equipment, which may affect the normal operation of the equipment or adversely affect the substances inside the equipment that need to be cooled. At this time, the temperature sensor sends a signal to the auxiliary sprayer, activating it. The auxiliary sprayer begins spraying liquid nitrogen, working in conjunction with spray head 64 to increase the cooling intensity of the areas inside the equipment that need cooling, rapidly reducing the temperature and ensuring that the equipment can continue to operate stably in a suitable temperature environment.

[0040] When the temperature sensor detects a temperature below -180℃, it indicates that the temperature inside the equipment is already at a low level, and may even be overcooled. To avoid adverse effects of overcooling on the equipment or the cooled materials, such as embrittlement of certain materials due to low temperatures, the auxiliary sprayer reduces the liquid nitrogen spray flow rate accordingly after receiving the signal from the temperature sensor. This method of dynamically adjusting the spray flow rate based on temperature ensures that the equipment operates within a suitable temperature range, avoids energy waste and the potential risks of overcooling, and greatly improves the stability, safety, and energy efficiency of the equipment operation.

[0041] In one embodiment, such as Figure 2 As shown, the top of the frame 5 is provided with six flow dividers 7, and each flow divider 7 is inclined to the top of the frame 5. A multi-flow curve is provided on one side of the flow divider 7. When liquid nitrogen flows through the flow divider 7, due to gravity, the liquid has a greater density and tends to flow downward along the surface of the flow divider 7, while the gas is lighter and flows upward above the liquid along the inclined direction of the flow divider 7. This promotes the formation of a continuous liquid film by the liquid under the action of gravity, which slides down the flow divider 7, while the gas flows in the space above the liquid film, thereby achieving the initial separation of gas and liquid.

[0042] The above embodiments disclose an immersion server heat dissipation device with liquid nitrogen cooling. By setting a return component 6, the liquid nitrogen that absorbs heat can still return to the spray head 64 after vaporization to spray and cool the top of the server. Furthermore, the server top is a semi-immersion cooling system, which can reduce liquid nitrogen consumption and recycle the liquid nitrogen.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A liquid nitrogen cooled immersion server cooling device, comprising a cabinet (1), a liquid outlet (2) formed on the surface of the cabinet (1), and an opening and closing plate (3) arranged on the top of the cabinet (1), characterized in that, The machine shell (1) is fixedly installed with a rack (5), the rack (5) is installed with a server, and the top of the rack (5) is provided with a backflow assembly (6); The backflow assembly (6) comprises a controller (61), a spray head (64) installed at the bottom of the controller (61), one side of the controller (61) is fixedly connected with a conveying pipe (63), one end of the conveying pipe (63) away from the controller (61) is fixedly connected with an air suction pipe (62), a liquid nitrogen pump (611) is fixedly installed on the inner wall of the controller (61), a vaporization cavity (612) is also installed on the inner wall of the controller (61), the vaporization cavity (612) and the liquid nitrogen pump (611) are separately placed, and an electromagnetic valve (613) is arranged at the separation position of the vaporization cavity (612) and the liquid nitrogen pump (611).

2. A liquid nitrogen cooled immersion server heat sink as claimed in claim 1, wherein, The conveying pipe (63) is provided with two groups of mirror images along the short side of the machine shell (1), the air suction pipe (62) is provided with three groups, the distance between every two groups of air suction pipes (62) is equal, the air suction pipe (62) is communicated with the conveying pipe (63), and the air suction pipe (62) and the conveying pipe (63) are wrapped on the outer wall of the rack (5).

3. A liquid nitrogen cooled immersion server heat sink as claimed in claim 1, wherein, A plurality of holes are formed on the surface of the rack (5), and the diameters of the holes are equal.

4. The liquid nitrogen cooled immersion server heat sink of claim 1, wherein, A temperature sensor is installed on the outer wall of the controller (61), and the temperature sensor is electrically connected with the liquid nitrogen pump (611).

5. The liquid nitrogen cooled immersion server heat sink of claim 1, wherein, Six groups of flow dividing plates (7) are arranged on the top of the rack (5), each group of flow dividing plates (7) is arranged obliquely on the top of the rack (5), and each group of flow dividing plates (7) is provided with a plurality of flow dividing curves.

6. A liquid nitrogen cooled immersion server heat sink as claimed in claim 1, wherein, The diameter of the spray head (64) is equal to the length of the short side of the rack (5).

7. The liquid nitrogen cooled immersion server heat sink of claim 1, wherein, The side of the spray head (64) is also provided with a separate auxiliary sprayer, and the auxiliary sprayer is electrically connected with the temperature sensor.

8. The liquid nitrogen cooled immersion server heat sink of claim 1, wherein, The inner wall of the machine shell (1) is provided with a heat preservation layer (4), and the heat preservation layer (4) is made of aerogel.

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