TW202234980A - Immersion cooling system - Google Patents

Abstract

An immersion cooling system is provided to solve the problem of high cost due to the use of two-phase working fluid in the conventional immersion cooling system. The system includes: a sealed container with a chamber; a circulation section formed by a first working fluid filled in the chamber; a working section formed by a second working fluid filled in the chamber The density of the second working fluid is lower than the density of the first working fluid, the boiling point of the second working fluid is higher than the boiling point of the first working fluid; and a circulating cooling module with a circulating pipeline , The circulation pipeline has a heat absorption section and a condensation section located between a first port and a second port, the first port and the second port are located in the chamber, and the first port communicates with the first working fluid, the heat absorption section is located in the working section.

Description

Immersion Cooling System

The present invention relates to a cooling system, especially an immersion cooling system.

Immersion cooling is to immerse electrical units (such as servers, motherboards, central processing units, graphics cards or memory, etc.) It is directly absorbed by the non-conductive liquid, so that the electrical unit can maintain a proper working temperature to achieve the expected working efficiency and service life. The non-conductive liquid can use a single-phase working liquid with a higher boiling point or a lower boiling point. , Two-phase working fluid with better heat exchange performance.

The conventional immersion cooling system using dual-phase working fluid generally includes a cooling tank and a condenser, the lower layer in the cooling tank is filled with liquid dual-phase working fluid, and the condenser is installed in the cooling tank The upper layer is located above the liquid two-phase working fluid. The electrical unit that needs to be cooled is immersed in the liquid two-phase working fluid. Due to the low boiling point of the two-phase working fluid, part of the two-phase working fluid can be converted into a gaseous state after absorbing the working heat energy of the electrical unit. Bubbles are formed in the liquid two-phase working fluid and float upward until they leave the surface layer of the liquid two-phase working fluid, and then condense back to the liquid state and drop down when they contact the condenser.

Although the dual-phase working fluid can provide better heat exchange performance due to the low temperature boiling effect, however, the price of the dual-phase working fluid is expensive, and filling the cooling tank completely with the dual-phase working fluid requires considerable costs, causing users economic burden.

In view of this, the conventional immersion cooling system does still need to be improved.

In order to solve the above problems, the purpose of the present invention is to provide an immersion cooling system, which can reduce the usage amount of the two-phase working fluid.

Another object of the present invention is to provide an immersion cooling system, which can improve the heat dissipation efficiency.

Another object of the present invention is to provide an immersion cooling system which can reduce the overall volume.

The directional or similar terms used throughout this disclosure, such as "front", "back", "left", "right", "top (top)", "bottom (bottom)", "inside", "outside" , "side surface", etc., mainly refer to the directions of the attached drawings, each directionality or its similar terms are only used to assist the description and understanding of the various embodiments of the present invention, and are not intended to limit the present invention.

The use of the quantifier "a" or "an" for the elements and components described throughout the present invention is only for convenience and provides a general meaning of the scope of the present invention; in the present invention, it should be construed as including one or at least one, and a single The concept of also includes the plural case unless it is obvious that it means otherwise.

Similar terms such as "combined", "combined" or "assembled" mentioned in the whole text of the present invention mainly include the components that can be separated without destroying the components after the connection, or the components can not be separated after being connected, which are common knowledge in the field. It can be selected according to the material of the components to be connected or the assembly requirements.

The immersion cooling system of the present invention comprises: a sealed tank with a chamber; a circulation layer formed by a first working fluid filled in the chamber; a working layer filled in the chamber formed by a second working fluid in the chamber, the boiling point of the second working fluid is higher than the boiling point of the first working fluid, the density of the second working fluid is lower than the density of the first working fluid, the first working fluid The second working fluid is insoluble in each other, the circulating layer and the working layer are adjacent to each other; and a circulating cooling module has a circulating pipeline, the circulating pipeline has a heat absorption section and a condensation section located at a first port and a second port, the first port and the second port are located in the chamber, and the first port communicates with the first working fluid, the heat absorption section is located in the working layer, and the first working fluid circulates and flows in the circulation line.

Accordingly, the immersion cooling system of the present invention uses both the first working fluid and the second working fluid for cooling, and the first working fluid with higher price and better heat exchange performance is only used for cooling The heat exchange is performed in the circulation pipeline, therefore, the user can greatly reduce the usage amount of the first working fluid, thereby saving considerable costs.

Wherein, the boiling point of the first working fluid may be lower than that of water. In this way, the system has the effect of improving the heat exchange performance.

The density of the first working fluid may be higher than that of water, and the density of the second working fluid may be lower than that of water. In this way, the system has the effect of naturally stratifying the first working fluid and the second working fluid.

Wherein, both the first working fluid and the second working fluid are non-conductive fluids. In this way, the system has the effect of cooling the electrical device.

Wherein, the circulation pipeline may not be a closed loop. In this way, the system has the effect of circulating the cooled first working fluid into the circulating pipeline.

Wherein, the condensation section may not be located in the circulation layer or the working layer. In this way, the condensing section can use a relatively sufficient heat dissipation space, which has the effect of improving the heat dissipation efficiency.

Therein, the condensation section may be located in the chamber. In this way, the system has the effect of reducing the overall volume of the immersion cooling system.

Wherein, the circulating cooling module may further have a plurality of radiating fins, and the radiating fins are combined with the condensing section. In this way, the system has the effect of increasing the heat dissipation area.

Wherein, the circulating cooling module may further have at least one fan, and the fan is combined with the condensing section. In this way, the system has the effect of accelerating the circulation of air.

Wherein, the second port may be located in the working layer. In this way, the circulation line can have a shorter length, which has the effect of saving material.

Wherein, the circulating cooling module has a check valve located between the condensation section and the second port, and the outlet of the check valve communicates with the second port. In this way, the system has the effect of preventing the second working fluid from entering the circulation pipeline.

Wherein, the second port may be located in the loop layer. In this way, the first working fluid returned in the circulation pipeline can directly flow into the circulation layer, which has the effect of increasing the replenishment speed of the first working fluid.

Wherein, the circulating cooling module has a return section adjacent to the second port, and the return section may have several through holes. In this way, the system has the effect of removing the air in the pipeline.

Wherein, the circulating cooling module can have at least one water-cooling head, the water-cooling head is combined with the heat-absorbing section, the water-cooling head has a holding tank, the fluid of the circulating layer is communicated with the holding tank, and the outer surface of the water-cooling head has a heat-absorbing section noodle. In this way, the system has the effect of improving the heat dissipation efficiency.

Wherein, the water cooling head may have at least one locking portion. In this way, the system can be used to lock the water cooling head to the electrical unit, and has the effect of making the heat absorbing surface more closely contact with the heat source.

Wherein, the first port can be connected to a liquid outlet of a pump, and the liquid inlet of the pump is located in the circulation layer. In this way, the circulation speed of the first working fluid can be increased, which has the effect of improving the heat dissipation efficiency.

Therein, the pump may be located in the chamber. In this way, the system has the effect of reducing the occupied area of the immersion cooling system.

Wherein, the circulating cooling module may have a check valve located between the heat absorption section and the first port, and the inlet of the check valve communicates with the first port. In this way, the check valve can prevent the first working fluid in the circulation pipeline from entering the chamber through the first port, and has the effect of fixing the circulation direction of the first working fluid.

Wherein, the circulating cooling module may further have a plurality of heat sinks, the plurality of heat sinks are combined with the outer surface of the circulation pipeline, and the plurality of heat sinks may be located in the working layer. In this way, it has the effect of increasing the heat dissipation area of the circulation pipeline.

The immersion cooling system may further include an air layer formed in the chamber by the air in the chamber, and the circulating cooling module may further have a plurality of heat sinks, and the plurality of heat sinks are combined with the circulation pipe On the outer surface of the road, the plurality of cooling fins are located in the air layer. In this way, once the gaseous second working fluid exists in the air layer, the heat sink has the effect of re-condensing the gaseous second working fluid into a liquid state.

Wherein, the color of the first working fluid may be different from the color of the second working fluid. In this way, it has the effect of enhancing the color visual effect.

Wherein, the color of the first working fluid or/and the color of the second working fluid may be prepared by mixing fat-soluble dyes. In this way, there is an effect of reducing the manufacturing cost.

The immersion cooling system may further comprise at least one electrical unit having at least one heat source located in the working layer. In this way, it has the effect of maintaining the proper working temperature of the electrical unit.

In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings:

Please refer to FIG. 1 , which is the first embodiment of the immersion cooling system of the present invention, which includes a sealing tank 1 , a circulating layer 2 , a working layer 3 and a circulating cooling module 4 . The sealing groove 1 has a chamber S inside, the circulation layer 2 and the working layer 3 are accommodated in the chamber S, and the circulation cooling module 4 communicates with the chamber S.

The form of the sealing groove 1 is not limited in the present invention. In this embodiment, the sealing groove 1 may have a cylindrical body 11 and a cover body 12 , and the chamber S is located inside the cylindrical body 11 . The barrel 11 can be made of a see-through material, so that the user can observe the condition of the chamber S through the barrel 11 . The barrel 11 has an opening 111 to communicate with the chamber S, and the opening 111 can be used for The chamber S can input liquid, or pick and place objects to be cooled; the cover 12 can cover the opening 111, and the periphery of the cover 12 can be airtight with the cylinder 11 by, for example, a rubber ring to ensure the The gas or liquid in the chamber S will not leak from the periphery of the cover body 12 to the outside.

The circulation layer 2 is formed by a first working fluid L1 filled in the chamber S, and the first working fluid L1 may be a relatively expensive two-phase working fluid. The working layer 3 is formed by a second working fluid L2 filled in the chamber S. The boiling point of the second working fluid L2 is higher than the boiling point of the first working fluid L1. The second working fluid L2 can be It is a low-cost single-phase or two-phase working fluid. Preferably, the boiling point of the first working fluid L1 can be lower than that of water, which can improve the heat exchange performance of the immersion cooling system. In addition, the density of the second working fluid L2 is lower than the density of the first working fluid L1. Preferably, the density of the first working fluid L1 may be higher than that of water, and the density of the second working fluid L2 may be lower than that of water. water, whereby the first working fluid L1 and the second working fluid L2 can be naturally stratified in the chamber S, and the first working fluid L1 and the second working fluid L2 do not dissolve in each other, so that the The working layer 3 is adjacent to the circulation layer 2 . Both the first working fluid L1 and the second working fluid L2 are preferably non-conductive fluids, so that they can be used to cool electrical devices. And, the color of the first working fluid L1 may be different from the color of the second working fluid L2; for example, one of the first working fluid L1 and the second working fluid L2 may be a transparent color (ie, see-through, Including transparent colored and transparent colorless), the other can be non-transparent (ie not transparent, such as saturated red, yellow, blue, green...). Wherein, the color of the first working fluid L1 or/and the color of the second working fluid L2 is preferably prepared by blending a fat-soluble dye.

The immersion cooling system may further include at least one electrical unit E, the electrical unit E is an object to be cooled and has at least one heat source H, and the electrical unit E may be a motherboard, a communication interface board, a display card or a data storage board etc. device. The electrical unit E can be positioned at a preset position in the chamber S, so that the electrical unit E can be immersed in contact with the second working fluid L2. For example, the entire electrical unit E can be immersed in the working layer 3, or at least the heat source H of the electrical unit E can be immersed in the working layer 3, which is not limited by the present invention.

The circulating cooling module 4 has a circulating pipeline 41 for circulating the first working fluid L1. The circulating pipeline 41 can be made of thermally conductive materials such as copper, aluminum, titanium or stainless steel. The circuit 41 has a first port 411, the first port 411 is connected to a heat absorption section 41a, the heat absorption section 41a is connected to a condensation section 41b, and the condensation section 41b is connected to the second port 412, the first port 411 and the The second port 412 is located in the chamber S, and the first port 411 is connected to the first working fluid L1. In this embodiment, the first port 411 is located in the circulation layer 2, so that the first working fluid L1 can thereby enter the circulation line 41 .

As mentioned above, the heat absorbing section 41a is a part of the circulation pipeline 41 passing through the working layer 3, more specifically, the heat absorbing section 41a is located in the working layer 3, and may be a position adjacent to the heat source H , so that the heat absorption section 41a absorbs the heat of the heat source H. The condensation section 41b is used to cool the first working liquid L1. Preferably, the condensation section 41b may not be located in the circulation layer 2 or the working layer 3. In this embodiment, the condensation section 41b is located in the sealing groove In addition, in this way, the condensation section 41b can use a relatively sufficient heat dissipation space, which has the effect of improving the heat dissipation efficiency.

In addition, in order to further improve the heat dissipation efficiency, the circulating cooling module 4 can further have several radiators 42, and the radiators 42 can be combined with the condensation section 41b, thereby increasing the heat dissipation area. Preferably, the circulating cooling module 4 can further have at least one fan 43, and the fan 43 can also be combined with the condensing section 41b, thereby having the effect of accelerating the circulation of air.

The second port 412 is used to return the cooled first working fluid L1 to the chamber S. The position of the second port 412 in the chamber S is not limited in the present invention. In this embodiment, the second port 412 can be located in the working layer 3, whereby the circulation pipeline 41 can have a shorter length The length of the system has the effect of saving material.

In the immersion cooling system of this embodiment, when the electrical unit E operates to generate thermal energy, the second working fluid L2 around the electrical unit E and the first working fluid L1 in the circulation pipeline 41 can absorb thermal energy , so that the electrical unit E can be maintained at an appropriate working temperature, the second working fluid L2 is used to cool the electrical unit E and perform heat exchange with the circulation pipeline 41 to maintain the ambient temperature of the working layer 3, The first working fluid L1 is used to take away the heat of the heat source H at an accelerated rate.

In detail, in this embodiment, the circulation pipeline 41 is not a closed circuit, whereby the cooled first working fluid L1 can be circulated and replaced into the circulation pipeline 41, because the first working fluid L1 It is only used for heat exchange in the circulation pipeline 41, so the usage amount of the first working fluid L1 can be much lower than that of the second working fluid L2, so the user can save considerable costs. Also, since the usage amount of the second working fluid L2 is higher than that of the first working fluid L1, the weight of the second working fluid L2 can be used to pressurize, so that the first working fluid L1 can pass through the first port 411 , into the heat absorption section 41a of the circulation pipeline 41 . The first working fluid L1 in the heat absorption section 41a can absorb the heat of the heat source H, vaporize into a gaseous state, and flow into the condensation section 41b to carry the heat away from the heat source H. After the gaseous first working liquid L1 enters the condensation section 41b, it is cooled down and condensed back to a liquid state, and flows toward the second port 412 . The cooled first working fluid L1 can be returned to the working layer 3 through the second port 412, and then the first working fluid in liquid state is made to work by the density difference between the first working fluid L1 and the second working fluid L2. The liquid L1 can naturally sink back to the circulation layer 2, and then enter the first port 411 and flow to the heat absorption section 41a, so as to continuously circulate so as to continuously absorb the heat of the heat source H.

In addition, since the color of the first working fluid L1 can be different from the color of the second working fluid L2, in addition to making the two easy to identify, when the first working fluid L1 in the heat absorbing section 41a is converted into a gaseous state and flows During the process of entering the condensation section 41b, condensing back to liquid state and flowing to the second port 412, the color visual effect presented can also be viewed from around the sealing groove 1, which can not only bring benefits to industries (eg, e-sports industry) To bring more business opportunities, it can be both practical and aesthetic.

Please refer to FIG. 2, which is the second embodiment of the immersion cooling system of the present invention. In this embodiment, the circulating cooling module 4 may have at least one water cooling head 44, and the water cooling head 44 is combined with the endothermic head 44. In section 41a, the water cooling head 44 has a tank 441, the fluid of the circulation layer 2 communicates with the tank 441, and the outer surface F1 of the water cooling head 44 has a heat absorption surface 442. The heat absorbing surface 442 can be used to contact the heat source H, and the container 441 can be used for the flow of the first working fluid L1, so that the heat energy of the heat source H can be directly transferred from the heat absorbing surface 442 to the container 441, and then The circulating flow is caused by the phase change of the first working fluid L1 to take away the heat energy of the heat source H, thereby improving the heat dissipation efficiency. Preferably, the water cooling head 44 may have at least one locking portion 443, which can be used to lock the water cooling head 44 to the electrical unit E, whereby the locking portion 443 has the function of making the heat absorbing surface 442 in closer contact. The role of the heat source H.

In addition, the circulation pipeline 41 may further have a return section 41c, the return section 41c is adjacent to the second port 412, and the return section 41c may have several through holes 413. The return section 41c is used to guide the first working fluid L1 to the second port 412, so that the first working fluid L1 is returned to the chamber S, when the first working fluid L1 in the return section 41c When the circulating pipeline 41 is still partially gaseous, or the circulating pipeline 41 has residual air due to the pipeline erection process, the gas can be discharged through the through hole 413, which has the effect of removing the pipeline air.

Please refer to FIG. 3, which is the third embodiment of the immersion cooling system of the present invention. The number of the electrical units E can be several, and each electrical unit E can also have several heat sources H. In this embodiment In an example, the electrical unit E has two heat sources H, the heat absorption section 41a can pass through the heat sources H in sequence, and dissipate heat from the heat sources H by the corresponding two water cooling heads 44. The structure of the circulation pipeline 41 can be The adjustment according to the number of the electrical unit E and the heat source H can be understood by those skilled in the art.

In addition, the circulating cooling module 4 can have a pump 45, the liquid outlet 451 of the pump 45 is connected to the first port 411, and the first port 411 can be located in the working layer 3, or preferably located in the circulating In layer 2, the present invention is not limited, and the liquid inlet 452 of the pump 45 is located in the circulation layer 2. Thereby, the first working fluid L1 can still enter the circulation pipeline 41, and the circulation speed can be increased by the driving of the pump 45, and the speed of removing heat can also be relatively increased, which has the effect of improving the heat dissipation efficiency. . Preferably, the pump 45 can be located in the chamber S, which has the effect of reducing the occupied area of the immersion cooling system.

The circulating cooling module 4 may further have a check valve 46 , the check valve 46 is located between the heat absorption section 41 a and the first port 411 , and the inlet 461 of the check valve 46 communicates with the first port 411 . The check valve 46 can prevent the first working fluid L1 in the circulation pipeline 41 from entering the chamber S through the first port 411 , whereby the check valve 46 has the function of fixing the first working fluid The role of the circulation direction of L1.

In addition, the immersion cooling system may further include at least one air layer 5 , the air layer 5 may be formed in the chamber S by the air in the chamber S, and the air layer 5 is adjacent to the working layer 3 . Above, the air layer 5 can be used to provide a cooling space, so that the vaporized first working fluid L1 or/and the two working fluids L2 can be re-condensed into liquid here, and then return to the circulation layer 2 or/and The working layer 3.

The circulating cooling module 4 may preferably have a plurality of heat sinks 47 . The heat sinks 47 are combined with the outer surface F2 of the circulating pipeline 41 to increase the heat dissipation area of the circulating pipeline 41 . The plurality of heat sinks 47 The position of the heat sink 47 can be located in the working layer 3 or in the air layer 5, and the present invention is not limited. In this embodiment, the plurality of heat sinks 47 can be located in the air layer 5. In addition to increasing the heat dissipation area of the circulation pipeline 41 , once the gaseous second working fluid L2 exists in the air layer 5 , the cooling fins 47 can also help the gaseous second working fluid L2 to cool down and condense into a liquid state again.

As mentioned above, the position of the second port 412 in the chamber S is not limited in the present invention. In this embodiment, the second port 412 can be located in the circulation layer 2, which can make the circulation pipeline 41 The first working fluid L1 backflowing in the middle flows directly into the circulation layer 2, thereby, it has the effect of increasing the replenishment speed of the first working fluid L1.

Please refer to FIG. 4, which is the fourth embodiment of the immersion cooling system of the present invention. In this embodiment, the condensation section 41b can be located in the chamber S, and the radiator 42 is combined with the condensation section 41b , the radiator 42 can dissipate heat by penetrating the cover body 12 to contact the external environment, thereby cooling the first working fluid L1 in the condensation section 41b. In this way, the system has the effect of reducing the overall volume of the immersion cooling system. In addition, the check valve 46 can also be located between the return section 41c and the second port 412, and the outlet 462 of the check valve 46 is connected to the second port 412, whereby the check valve 46 can prevent The second working fluid L2 enters the circulation pipeline 41 through the second port 412 .

To sum up, the immersion cooling system of the present invention uses both the first working fluid and the second working fluid for cooling, and the first working fluid with higher price and better heat exchange performance is only It is used for heat exchange in the circulation pipeline, therefore, the user can greatly reduce the usage amount of the first working fluid, thereby saving considerable cost. In addition, the circulation pipeline can be combined with the cooling fin, the fan, the pump and other devices to further improve the heat dissipation efficiency of the immersion cooling system.

Although the present invention has been disclosed by the above-mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the patent application attached hereto.

1: sealing groove 11: Cylinder 111: Opening 12: Cover 2: Circulation layer 3: Working layer 4: Circulating cooling module 41: Circulation pipeline 41a: endothermic section 41b: Condensing section 41c: Recirculation section 411: first port 412: second port 413: Through hole 42: Radiator 43: Fan 44: Water block 441: Container 442: Endothermic Surface 443: Locking part 45: Pump 451: Liquid outlet 452: liquid inlet 46: Check valve 461: Entrance 462:Export 47: Heat sink 5: Air layer E: electrical unit F1, F2: outer surface H: heat source L1: The first working fluid L2: Second working fluid S: Chamber

[FIG. 1] A combined cross-sectional view of the first embodiment of the present invention. [FIG. 2] A combined cross-sectional view of the second embodiment of the present invention. [FIG. 3] A combined cross-sectional view of the third embodiment of the present invention. [FIG. 4] A combined cross-sectional view of the fourth embodiment of the present invention.

1: sealing groove

11: Cylinder

111: Opening

12: Cover

2: Circulation layer

3: Working layer

4: Circulating cooling module

41: Circulation pipeline

41a: endothermic section

41b: Condensing section

41c: Recirculation section

411: first port

412: second port

42: Radiator

43: Fan

5: Air layer

E: electrical unit

H: heat source

L1: The first working fluid

L2: Second working fluid

S: Chamber

Claims (23)

An immersion cooling system comprising: a sealing groove having a chamber; a circulating layer formed by a first working fluid filled in the chamber; A working layer is formed by a second working fluid filled in the chamber, the boiling point of the second working fluid is higher than that of the first working fluid, and the density of the second working fluid is lower than that of the first working fluid The density of the working fluid, the first working fluid and the second working fluid do not dissolve in each other, the circulation layer and the working layer are adjacent to each other; and A circulating cooling module has a circulating pipeline, the circulating pipeline has a heat absorption section and a condensation section located between a first port and a second port, and the first port and the second port are located in the chamber and the first port is connected to the first working fluid, the heat absorbing section is located in the working layer, and the first working fluid circulates in the circulation pipeline. The immersion cooling system of claim 1, wherein the boiling point of the first working fluid is lower than that of water. The immersion cooling system of claim 1, wherein the density of the first working fluid is higher than that of water, and the density of the second working fluid is lower than that of water. The immersion cooling system of claim 1, wherein the first working fluid and the second working fluid are both non-conductive fluids. The immersion cooling system of claim 1, wherein the circulation pipeline is not a closed loop. The immersion cooling system of claim 1, wherein the condensation section is not located in the circulation layer or the working layer. The immersion cooling system of claim 6, wherein the condensation section is located in the chamber. The immersion cooling system of claim 6, wherein the circulating cooling module further has a plurality of cooling fins, and the cooling fins are combined with the condensation section. The immersion cooling system of claim 6, wherein the circulating cooling module further has at least one fan, and the fan is combined with the condensation section. The immersion cooling system of claim 1, wherein the second port is located in the working layer. The immersion cooling system of claim 10, wherein the circulating cooling module has a check valve located between the condensation section and the second port, and an outlet of the check valve communicates with the second port. The immersion cooling system of claim 1, wherein the second port is located in the circulation layer. The immersion cooling system of claim 1, wherein the circulation pipeline has a return section adjacent to the second port, and the return section has a plurality of through holes. The immersion cooling system of claim 1, wherein the circulating cooling module has at least one water-cooling head, the water-cooling head is combined with the heat absorbing section, the water-cooling head has a container, and the fluid of the circulating layer communicates with the container, The outer surface of the water cooling head has a heat absorption surface. The immersion cooling system of claim 14, wherein the water cooling head has at least one locking portion. The immersion cooling system of claim 1, wherein the first port communicates with a liquid outlet of a pump, and the liquid inlet of the pump is located in the circulation layer. The immersion cooling system of claim 16, wherein the pump is located in the chamber. The immersion cooling system of claim 1, wherein the circulating cooling module has a check valve located between the heat absorbing section and the first port, and an inlet of the check valve communicates with the first port. The immersion cooling system of claim 1, wherein the circulating cooling module further has a plurality of cooling fins, the cooling fins are combined with the outer surface of the circulation pipeline, and the cooling fins are located in the working layer. The immersion cooling system of claim 1 further comprises an air layer formed in the chamber by the air in the chamber, the circulating cooling module further has a plurality of heat sinks, and the heat sinks are combined with the circulation On the outer surface of the pipeline, the cooling fin is located in the air layer. The immersion cooling system of claim 1, wherein the color of the first working fluid is different from the color of the second working fluid. The immersion cooling system of claim 21, wherein the color of the first working fluid or/and the color of the second working fluid is prepared by blending a fat-soluble dye. The immersion cooling system of any one of claims 1 to 22, further comprising at least one electrical unit, the electrical unit having at least one heat source, and the heat source is located in the working layer.

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