TWI751804B - Cooling system of server - Google Patents

Abstract

A cooling system of server includes a tank and a pressure control device. The tank is configured to accommodate a dielectric fluid. The pressure control device is configured to regulate the pressure of the tank. The pressure control device includes a condenser, a dehumidifier, a gas storage chamber, and a valve. The condenser is connected to the tank. The dehumidifier is connected to the condenser. The gas storage chamber is connected to the dehumidifier. The valve is connected between the dehumidifier and the gas storage chamber. The valve is configured to conduct and not to conduct the dehumidifier and the gas storage chamber.

Description

Server cooling system

The present disclosure relates to a cooling system for a server, and more particularly, to a two-phase immersion cooling system.

Because of its better heat dissipation efficiency, immersion cooling systems are widely used in the heat dissipation of electronic components that generate a lot of waste heat due to operation. A common implementation is to immerse the server in a dielectric liquid in a liquid tank to achieve heat dissipation. Purpose. However, the moisture in the air existing in the immersion cooling system can form condensed water back into the liquid tank due to condensation, and then contact the electronic components immersed in the dielectric liquid, resulting in the risk of damage to the electronic components.

In order to prevent the condensed water formed by condensation of water vapor in the air from contacting the electronic components and causing damage to the electronic components, a porous box containing molecular sieves (water-absorbing materials) is currently installed in the liquid tank. The molecular sieve in the porous box can absorb the liquid water condensed in the liquid tank.

However, the porous box can only absorb the water vapor or liquid water in contact with it. For a two-phase immersion cooling system without active liquid flow, it is difficult to control the contact between the liquid water and the molecular sieve. It may happen that although the cooling system is equipped with molecular sieve, However, there is still liquid water floating on the surface of the dielectric liquid, and the effect of removing water is not strong. In addition, since the porous box is placed in the liquid tank, the liquid tank will be enlarged, and there is also a dielectric liquid between the particles of the molecular sieve, which increases the usage of the dielectric liquid, leads to an increase in the cost of the dielectric liquid and reduces the system density. . In current pressure control devices, the system will either expel or absorb gas due to pressure changes. In this condition, each time the cooling system draws in fresh outside air, additional moisture will be introduced, increasing the likelihood of liquid water being generated in the cooling system and increasing the likelihood that components will come into contact with liquid water. In addition, because the latent heat of liquid water is extremely large, the production of liquid water not only harms electronic components, but also increases the load of the cooling system.

Therefore, how to propose a cooling system for a server that can solve the above problems is one of the problems that the industry is eager to devote to R&D resources to solve.

In view of this, one objective of the present disclosure is to provide a cooling system for a server that can solve the above problems.

In order to achieve the above objective, according to an embodiment of the present disclosure, a cooling system for a server includes a tank body and a pressure control device. The tank body is configured to accommodate the dielectric fluid. The pressure control device is used to adjust the pressure of the tank body. The pressure control device includes a condenser, a dehumidifier, an air storage chamber, and a valve. The condenser is connected to the tank. The dehumidifier is connected to the condenser. The air storage chamber is connected to the dehumidification device. The valve is connected between the dehumidification device and the air storage chamber. The valve is configured to conduct and not conduct the dehumidification device and the air storage chamber.

In one or more embodiments of the present disclosure, the cooling system of the server further includes a barometer and a controller. The barometer is configured to sense the air pressure in the tank. The controller is configured to disable the valve from conducting the dehumidification device and the air storage chamber when the air pressure value is greater than the upper air pressure value, and is configured to enable the valve to conduct the dehumidification device and the air storage chamber when the air pressure value is less than the upper air pressure value.

In one or more embodiments of the present disclosure, the controller is further configured to disable the valve from conducting the dehumidification device and the air storage chamber when the air pressure value is less than the air pressure lower limit value.

In one or more embodiments of the present disclosure, the cooling system of the server further includes a pipeline. One end of the pipeline is connected to the valve, and the valve is further configured to conduct and not conduct the dehumidification device and the pipeline.

In one or more embodiments of the present disclosure, the cooling system of the server further includes a barometer and a controller. The barometer is configured to sense the air pressure in the tank. The controller is configured to make the valve not conduct the dehumidification device and the air storage chamber when the air pressure value is greater than the upper limit value of the air pressure, and at the same time make the valve conduct the dehumidification device and the pipeline. The controller is further configured to make the valve conduct the dehumidification device and the air storage chamber when the air pressure value is less than the upper limit value of the air pressure, and at the same time make the valve do not conduct the dehumidification device and the pipeline.

In one or more embodiments of the present disclosure, the controller is further configured to make the valve connect to the dehumidifying device and the pipeline when the air pressure value is less than the lower limit value of the air pressure, while making the valve not connect to the dehumidifying device and the air storage chamber.

In one or more embodiments of the present disclosure, the pressure control device further includes a casing. And the condenser, dehumidifier, valve, air storage chamber and pipeline are all located in the box.

In one or more embodiments of the present disclosure, the cooling system of the server further includes a fan set. The fan group is arranged on the box body and adjacent to the condenser.

In one or more embodiments of the present disclosure, the dehumidifying device further includes a cylindrical structure and a moisture absorbing material. The cylindrical structure has interfaces on opposite sides. The hygroscopic material is disposed in the cylindrical structure and configured to absorb water but not dielectric fluid.

To sum up, in the cooling system of the server of the present disclosure, the gas all flows through the dehumidification device to increase the dehumidification efficiency and reduce the humidity of the gas in the tank, so compared with the conventional technology, the possibility of condensed water can be fundamentally reduced. In addition to avoiding the harm of liquid water to electronic components, it also avoids the extra power consumption required by the condenser to condense water vapor. In addition, the cooling system of the server of the present disclosure uses a valve to control the air pressure of the system within a predetermined range, so as to avoid excessive or excessive air volume in the system. In addition, the cooling system of the server of the present disclosure stores the dehumidified dry air through the air storage chamber, so that the cooling system of the server can maintain the environment in the tank dry. In the cooling system of the server disclosed in the present disclosure, since the dehumidifying device is disposed outside the tank, in addition to reducing the space required for the tank to increase the density of the cooling system, the usage amount of the dielectric fluid can also be reduced, thereby reducing the amount of dielectric fluid used. Reduce the construction cost of the cooling system.

The above descriptions are only used to describe the problems to be solved by the present disclosure, the technical means for solving the problems, and their effects, etc. The specific details of the present disclosure will be introduced in detail in the following embodiments and related drawings.

Several embodiments of the present disclosure will be disclosed in the following drawings, and for the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the present disclosure. That is, in some embodiments of the present disclosure, these practical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known structures and elements will be shown in a simple and schematic manner in the drawings. The same reference numbers will be used throughout the drawings to refer to the same or similar elements.

The structure and function of each element included in the cooling system 100 of the server according to the present embodiment and the connection relationship between the various elements will be described in detail below.

As shown in FIG. 1 , in this embodiment, the cooling system 100 of the server includes a tank body 110 and a pressure control device 120 . The pressure control device 120 includes a condenser 121 , a dehumidifier 122 , a gas storage chamber 125 and a valve 126 . One side of the tank body 110 is loaded with the dielectric liquid 110a, and the other side of the tank body 110 is the gas side 110b opposite to the dielectric liquid 110a. The condenser 121 is connected to the tank body 110 . The dehumidifying device 122 is connected to the condenser 121 . The dehumidifying device 122 includes a cylindrical structure 123 and a moisture absorbing material 124 . The cylindrical structure 123 has ports 123a and 123b on opposite sides. The hygroscopic material 124 is disposed in the dehumidifying device 122 . The hygroscopic material 124 is configured to absorb water but not the dielectric fluid 110a. The air storage chamber 125 is connected to the dehumidification device 122 . The valve 126 is connected between the dehumidifying device 122 and the air storage chamber 125 .

With the aforementioned structure and configuration, when the dielectric liquid 110a in the tank body 110 generates steam (for example, due to the thermal heating of the electronic components), the gas in the tank body 110 will reach the condenser 121 and condense out the dielectric liquid 110a and then the dielectric liquid 110a. Flowing back to the tank 110, the remaining gas then reaches the hygroscopic material 124 to be absorbed by the moisture therein. When the valve 126 turns on the dehumidifying device 122 and the air storage chamber 125, the gas absorbed by the water vapor then enters the air storage chamber 125. At this time, the air in the air storage chamber 125 is dry air. When the air pressure in the tank body 110 drops because the temperature in the tank body decreases (for example, because the electronic components stop heating), the dry air in the air storage cavity 125 will enter the tank body 110 through the hygroscopic material 124 and the condenser 121 .

In some embodiments, the cooling system 100 of the server further includes a box 128 , and the condenser 121 , the dehumidifier 122 , the air storage chamber 125 , the valve 126 and the pipeline 127 are all located in the box 128 . In some embodiments, the cooling system 100 of the server further includes a fan pack 129 . The fan group 129 is arranged on the casing 128 . In some embodiments, the fan set 129 is adjacent to the condenser 121 to improve the condensation efficiency of the condenser 121 . The fan set 129 may have one or more fans according to the needs of the user.

As shown in FIG. 2 , in this embodiment, the cooling system 100 of the server further includes a controller C and a barometer 112 . For example, the controller C is provided outside the cooling system 100 of the server to control the valve 126 . The barometer 112 is configured to measure the air pressure in the tank body 110 . First, when the barometer 112 detects that the air pressure in the tank body 110 is between an upper air pressure value and a lower air pressure value, the controller C controls the valve 126 to conduct the dehumidification device 122 and the air storage chamber 125, so that the The dehumidified dry air will continue to enter the air storage chamber 125 . Then, when the barometer 112 detects that the air pressure in the tank body 110 is greater than the upper limit of the air pressure, the air storage chamber 125 also reaches the upper limit of the volume of gas that can be stored, and the barometer 112 sends a signal to the controller C, and then controls the Device C disables the control valve 126 from conducting the dehumidification device 122 and the air storage chamber 125 to store dry air in the air storage chamber 125 . Then, when the barometer 112 detects that the air pressure in the tank body 110 is lower than the upper limit value of the air pressure, the barometer 112 will send a signal to the controller C, and then the controller C will turn the control valve 126 through the dehumidification device 122 and the air storage device. cavity 125 , so that the dry air stored in the air storage cavity 125 is returned to the tank body 110 through the dehumidification device 122 and the condenser 121 .

As shown in FIGS. 1 and 2 , in this embodiment, the cooling system 100 of the server further includes a pipeline 127 . One end of the line 127 is connected to the valve 126 . When the barometer 112 detects that the air pressure in the tank body 110 is greater than the upper limit of the air pressure, the air storage chamber 125 also reaches the upper limit of the volume of gas that can be stored. At this time, the barometer 112 sends a signal to the controller C, and then the controller C The control valve 126 is not connected to the dehumidification device 122 and the gas storage chamber 125, and the control valve 126 is connected to the dehumidification device 122 and the pipeline 127, so that the excess gas can be dissipated to the outside through the pipeline 127, so as to avoid excessive gas in the cooling system 100 of the server. . When the barometer 112 detects that the air pressure in the tank body 110 is less than the upper limit of air pressure, the barometer 112 will send a signal to the controller C, and then the controller C will turn the control valve 126 through the dehumidification device 122 and the air storage chamber 125 , while the control valve 126 does not conduct the dehumidification device 122 and the pipeline 127 .

As shown in FIG. 1 and FIG. 2, in some embodiments, when the barometer 112 detects that the air pressure in the tank body 110 is less than a lower air pressure value, the barometer 112 will send a signal to the controller C at this time. , then the controller C disables the control valve 126 from conducting the dehumidification device 122 and the air storage chamber 125, and at the same time the control valve 126 conducts the dehumidification device 122 and the pipeline 127, so as to further enable the cooling system 100 of the server to absorb the air from the outside and avoid the server The gas in the cooling system 100 is too low.

With the aforementioned structure and configuration, the cooling system 100 of the server can achieve the effect of keeping the whole system in a dry state through the moisture absorption of the moisture absorbing material 124, and effectively prevent the liquid water from contacting the electronic components. In addition, since the vapor generated by the dielectric liquid 110a in the tank body 110 can be condensed in the condenser 121 and then flow back to the tank body 110 through the above-mentioned path, the escape of the dielectric liquid 110a can be effectively reduced to improve the dielectric liquid 110a. recovery rate.

In some embodiments, the condenser 121 can be connected to the tank body 110 through pipes. In other embodiments, the condenser 121 can be directly connected to the tank body 110 .

In some embodiments, the dielectric fluid 110a may be a dielectric substance such as oil or fluorinated fluid, but the present disclosure is not limited thereto.

In some embodiments, the hygroscopic material 124 may be a molecular sieve, but the present disclosure is not limited thereto. In some embodiments, the hygroscopic material 124 can be used with a humidity indicator, so that the user can immediately replace the hygroscopic material 124 according to the humidity state indicated by the humidity indicator.

In some embodiments, the gas storage chamber 125 may be one or more expandable and polycondensable bellows, but the present disclosure is not limited thereto.

In some embodiments, the valve 126 may be a solenoid valve, but the present disclosure is not limited thereto.

From the above detailed description of the specific embodiments of the present disclosure, it can be clearly seen that, in the cooling system of the server of the present invention, the hot vapor in the tank caused by the electronic components immersed in the dielectric liquid that generates waste heat and the The humid air entering the cooling system of the server from the outside absorbs water vapor and/or liquid water through the hygroscopic material, so as to avoid contact between the liquid water and the electronic components in the cooling system of the server. Since the air entering and exiting the cooling system of the server is treated with hygroscopic materials, it can effectively maintain the low humidity in the cooling system of the server. In the cooling system of the server of the present invention, the user can control the valve to maintain the air pressure between the set upper limit and the lower limit and prevent the escape of the dielectric fluid, thus effectively keeping the air pressure constant and increasing Dielectric fluid recovery. In addition, in the cooling system of the server of the present invention, omitting the dehumidification device placed in the tank can reduce the space required for the tank, increase the system density, and also reduce the amount of dielectric fluid used, reducing the system cost. construction cost.

In an embodiment of the present invention, the cooling system of the present invention can be applied to a server, and the server can be used for artificial intelligence (AI) computing, edge computing (edge computing), and can also be used as 5 G server, cloud server or car network server use.

Although the present disclosure has been disclosed as above in embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection of the present disclosure The scope shall be determined by the scope of the appended patent application.

100: Cooling system for the server 110: tank body 110a: Dielectric Fluid 110b: Gas side 112: Barometer 120: Pressure control device 121: Condenser 122: Dehumidification device 123: Tubular structure 123a, 123b: Interface 124: Hygroscopic material 125: Air storage chamber 126: Valve 127: Pipeline 128: Box 129: Fan group C: controller

In order to make the above and other objects, features, advantages and embodiments of the present disclosure more clearly understood, the accompanying drawings are described as follows: FIG. 1 is a schematic diagram illustrating a cooling system of a server according to an embodiment of the present disclosure. FIG. 2 is a functional block diagram showing some components of the cooling system of the server in FIG. 1 .

100: Cooling system

110: tank body

110a: Dielectric Fluid

110b: Gas side

112: Barometer

120: Pressure control device

121: Condenser

122: Dehumidification device

123: Tubular structure

123a, 123b: Interface

124: Hygroscopic material

125: Air storage chamber

126: Valve

127: Pipeline

128: Box

129: Fan group

Claims (5)

A cooling system for a server, comprising: a tank body configured to accommodate a dielectric fluid to dissipate heat to a server; a pressure control device for adjusting the pressure of the tank body, including: a condenser, connected to the tank body; a dehumidification device, connected to the condenser; a gas storage chamber, connected to the dehumidification device; and a valve, connected between the dehumidification device and the gas storage chamber, the valve is configured to conduct or not conduct the dehumidification device and the air storage chamber; a pipeline, one end of the pipeline is connected to the valve, and the valve is further configured to conduct and not conduct the dehumidification device and the pipeline; a barometer, configured to sense one of the inside of the tank an air pressure value; and a controller configured to make the valve not conduct the dehumidification device and the air storage chamber when the air pressure value is greater than an air pressure upper limit value, while making the valve conduct the dehumidification device and the pipeline, and configured to When the air pressure value is less than the air pressure upper limit value, the valve is made to conduct the dehumidification device and the air storage chamber, and at the same time, the valve is made to not conduct the dehumidification device and the pipeline. The cooling system for a server as claimed in claim 1, wherein the controller is further configured to make the valve conduct the dehumidification device and the pipeline when the air pressure value is less than a lower air pressure value, and at the same time make the valve not conduct the dehumidification device and the air storage chamber. The cooling system of the server as claimed in claim 1, which The pressure control device further comprises a box, and the condenser, the dehumidifier, the valve, the gas storage chamber and the pipeline are all located in the box. The cooling system of the server according to claim 3, further comprising a fan group disposed on the box and adjacent to the condenser. The cooling system for a server as claimed in claim 1, wherein the dehumidifying device further comprises: a cylindrical structure having interfaces on opposite sides; and a moisture absorbing material disposed in the cylindrical structure and configured to Absorbs water without absorbing the dielectric fluid.

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