TWI817091B - 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, in particular to an immersion cooling system.

Immersion cooling is to immerse electrical units (such as servers, motherboards, CPUs, graphics cards or memories, etc.) in non-conductive liquid so that the high-temperature heat energy generated by the electrical units during operation can be It is directly absorbed by the non-conductive liquid so that the electrical unit can maintain the appropriate working temperature to achieve the expected working efficiency and service life. The non-conductive liquid can use a single-phase working fluid with a higher boiling point or a lower boiling point. , a two-phase working fluid with better heat exchange performance.

A conventional immersion cooling system using a two-phase working fluid generally includes a cooling tank and a condenser. The lower layer of the cooling tank is filled with liquid two-phase working fluid. 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 a liquid two-phase working fluid. Since the boiling point of the two-phase working fluid is low, the system can convert part of the two-phase working fluid into a gaseous state after absorbing the working heat energy of the electrical unit. Bubbles form in the liquid two-phase working fluid and float upward until they leave the surface of the liquid two-phase working fluid. When they contact the condenser, they condense back to the liquid state and drip downward.

Although the dual-phase working fluid can provide better heat exchange performance due to the low-temperature boiling effect, the dual-phase working fluid is expensive, and filling the cooling tank with the dual-phase working fluid requires considerable costs, causing user inconvenience. financial burden.

In view of this, there is still a need to improve the conventional immersion cooling system.

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

A secondary object of the present invention is to provide an immersion cooling system that can improve heat dissipation efficiency.

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

Directionality or similar terms are used throughout the present invention, such as "front", "back", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "side", etc. mainly refer to the directions of the attached drawings. Each directionality or its approximate terms are only used to assist in explaining and understanding the various embodiments of the present invention, and are not intended to limit the present invention.

The use of the quantifier "a" or "an" in the elements and components described throughout the present invention is only for convenience of use and to provide a common sense of the scope of the present invention; in the present invention, it should be interpreted as including one or at least one, and single The concept of also includes the plural unless it is obvious that something else is meant.

Approximate terms such as "combination", "combination" or "assembly" used throughout the present invention mainly include forms that can be separated without damaging the components after being connected, or components that are inseparable after being connected, and are based on common knowledge in this field. You can choose according to the material of the components to be connected or the assembly requirements.

The immersion cooling system of the present invention includes: a sealed tank with a chamber; a circulation layer formed by a first working fluid filled in the chamber; a working layer formed by filling the chamber It is formed by a second working liquid in the chamber. The boiling point of the second working liquid is higher than the boiling point of the first working liquid. The density of the second working liquid is lower than the density of the first working liquid. The first working liquid The second working fluid does not dissolve with each other, the circulation layer and the working layer are adjacent to each other; and a circulation cooling module has a circulation pipeline, the circulation 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 is connected to the first working fluid, the heat absorption section is located in the working layer, and the first working fluid circulates in the circulation pipeline.

Accordingly, the immersion cooling system of the present invention simultaneously uses the first working fluid and the second working fluid to perform cooling work, and the first working fluid, which is more expensive and has better heat exchange performance, is only used for cooling. Heat exchange is performed in the circulation pipeline, so the user can significantly reduce the usage of the first working fluid, thereby saving considerable costs.

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

The first working fluid may have a density higher than water, and the second working fluid may have a density lower than water. In this way, it has the effect of naturally stratifying the first working fluid and the second working fluid.

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

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

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

Wherein, the condensation section may be located in the chamber. In this way, the overall volume of the immersion cooling system is reduced.

Wherein, the circulation cooling module may also have several heat sinks, and the heat sinks are combined with the condensation section. In this way, the system has the effect of increasing the heat dissipation area.

Wherein, the circulation cooling module may also have at least one fan, and the fan is combined with the condensation section. In this way, it has the effect of accelerating air circulation.

Wherein, the second port may be located in the working layer. In this way, the circulation pipeline can have a shorter length, thereby saving materials.

Wherein, the circulation cooling module has a check valve located between the condensation section and the second port, and the outlet of the check valve is connected to the second port. In this way, it has the effect of preventing the second working fluid from entering the circulation pipeline.

Wherein, the second port may be located in the circulation 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 circulation 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 air from the pipeline.

Wherein, the circulation 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 circulation layer is connected 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 heat dissipation efficiency.

Wherein, the water-cooling head may have at least one locking part. In this way, the water-cooling head can be locked to the electrical unit, which has the effect of bringing the heat-absorbing surface into closer 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.

Wherein the pump can be located in the chamber. In this way, the area occupied by the immersed cooling system is reduced.

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

Wherein, the circulation cooling module may also have a plurality of heat sinks, the plurality of heat sinks are combined with the outer surface of the circulation pipe, and the several 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. The circulation cooling module may also have a plurality of heat sinks, and the plurality of heat sinks are combined with the circulation tube. On the outer surface of the road, the plurality of heat sinks 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 recondensing the gaseous second working fluid into a liquid state.

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 improving the color visual effect.

Wherein, the color of the first working fluid and/or the color of the second working fluid may be blended with a fat-soluble dye. This has the effect of reducing manufacturing costs.

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, the electrical unit has the effect of maintaining an appropriate operating temperature.

In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following describes the preferred embodiments of the present invention in detail with reference to the accompanying drawings:

Please refer to Figure 1, which is a first embodiment of the immersion cooling system of the present invention. It includes a sealing tank 1, a circulation layer 2, a working layer 3 and a circulation cooling module 4. There is a chamber S inside the sealing tank 1. The circulation layer 2 and the working layer 3 are accommodated in the chamber S. The circulation cooling module 4 is connected to the chamber S.

The invention is not limited to the type of the sealing groove 1. In this embodiment, the sealing groove 1 can have a cylinder 11 and a cover 12, and the chamber S is located inside the cylinder 11. The cylinder 11 can optionally be made of a see-through material, so that the user can observe the condition of the chamber S through the cylinder 11. The cylinder 11 has an opening 111 connected to the chamber S, and the opening 111 can be used to view the chamber S. The chamber S inputs liquid, or takes in and places 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, for example, by a rubber ring to ensure that the The gas or liquid in the chamber S will not leak from the periphery of the cover 12 to the outside world.

The circulation layer 2 is formed by a first working fluid L1 filled in the chamber S. The first working fluid L1 may be a relatively expensive two-phase working fluid. The working layer 3 is formed by a second working liquid L2 filled in the chamber S. The boiling point of the second working liquid L2 is higher than the boiling point of the first working liquid L1. The second working liquid L2 can It is a cheaper 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 immersed 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 can be higher than water, and the density of the second working fluid L2 can be lower than that of water. Water, thereby allowing the first working fluid L1 and the second working fluid L2 to naturally stratify in the chamber S, and the first working fluid L1 and the second working fluid L2 do not dissolve each other, so that the The working layer 3 is adjacent to the circulation layer 2 . The first working fluid L1 and the second working fluid L2 are preferably both non-conductive liquids, 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 opaque (that is, not see-through, such as saturated red, yellow, blue, green...). Among them, the color of the first working fluid L1 and/or the color of the second working fluid L2 is preferably blended with a fat-soluble dye.

The immersion cooling system may also include at least one electrical unit E. The electrical unit E is an object that needs to be cooled and has at least one heat source H. The electrical unit E may be a motherboard, a communication interface board, a display card or a data storage board. and other devices. The electrical unit E may 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 circulation cooling module 4 has a circulation pipe 41 for circulating the first working fluid L1. The circulation pipe 41 can be made of thermally conductive materials such as copper, aluminum, titanium or stainless steel. The circulation pipe The path 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, the condensation section 41b is in turn 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 pipeline 41 .

Following the above, the heat absorption section 41a is a part of the circulation pipeline 41 passing through the working layer 3. To be more specific, the heat absorption section 41a is located in the working layer 3, and may be adjacent to the heat source H. , thereby causing the heat absorption section 41a to absorb the heat of the heat source H. The condensation section 41b is used to cool the first working fluid L1. The condensation section 41b is preferably not located in the circulation layer 2 or the working layer 3. In this embodiment, the condensation section 41b is located in the sealing groove. 1 In addition, in this way, the condensation section 41b can use a relatively ample heat dissipation space, which has the effect of improving heat dissipation efficiency.

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

The immersion cooling system of this embodiment can absorb heat energy from the second working fluid L2 around the electrical unit E and the first working fluid L1 in the circulation pipeline 41 when the electrical unit E operates and generates heat. , so that the electrical unit E can be maintained at an appropriate operating temperature. The second working fluid L2 is used to cool the electrical unit E and conduct 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 accelerate the removal of heat from the heat source H.

Specifically, in this embodiment, the circulation pipeline 41 is not a closed loop, whereby the cooled first working fluid L1 can circulate into the circulation pipeline 41. Since 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. Therefore, the user can save considerable costs. Also because 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 the first working fluid L1 through the first port 411 , entering the heat-absorbing section 41a of the circulation pipeline 41. The first working fluid L1 in the heat-absorbing section 41a can absorb the heat of the heat source H, vaporize into a gaseous state, and flow into the condensing section 41b to take the heat away from the heat source H. After the gaseous first working liquid L1 enters the condensation section 41b, it is cooled and lowered in temperature, condenses back to the liquid state, and flows to the second port 412. The cooled first working fluid L1 can flow back to the working layer 3 through the second port 412, and then the density difference between the first working fluid L1 and the second working fluid L2 can cause the liquid first working fluid L1 to flow back to the working layer 3. 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. This cycle continues to 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 the liquid state, and flowing to the second port 412, the colorful visual effect can also be viewed from around the sealing groove 1, which can not only bring benefits to industries (such as the e-sports industry) Comes with more business opportunities, and can combine practicality and beauty.

Please refer to Figure 2, which is a second embodiment of the immersion cooling system of the present invention. In this embodiment, the circulating cooling module 4 can have at least one water-cooling head 44, and the water-cooling head 44 is combined with the heat-absorbing In section 41a, the water-cooling head 44 has a receiving groove 441. The fluid in the circulation layer 2 is connected with the receiving groove 441. The outer surface F1 of the water-cooling head 44 has a heat-absorbing surface 442. The heat-absorbing surface 442 can be used to contact the heat source H, and the container 441 can allow the first working fluid L1 to flow. In this way, the thermal energy of the heat source H can be directly transferred from the heat-absorbing surface 442 to the container 441, and then The phase change of the first working fluid L1 causes a circulating flow to take away the heat energy of the heat source H, thereby improving the heat dissipation efficiency. Preferably, the water-cooling head 44 can 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 ability to make the heat-absorbing surface 442 more closely contact The role of the heat source H.

In addition, the circulation pipeline 41 may also have a return section 41c adjacent to the second port 412, and the return section 41c may have a plurality of 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 returns to the chamber S. When the first working fluid L1 in the return section 41c When it is still partially gaseous, or there is residual air left in the circulation pipeline 41 due to the pipeline erection process, the gas can be discharged through the through hole 413, which has the function of expelling pipeline air.

Please refer to Figure 3, which is the third embodiment of the immersion cooling system of the present invention. The number of electrical units E can be several, and each electrical unit E can also have several heat sources H. In this embodiment In this example, the electrical unit E has two heat sources H. The heat absorption section 41a can pass through each heat source H in sequence, and dissipate heat to the heat source H with 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 with ordinary knowledge in the art.

In addition, the circulating cooling module 4 may have a pump 45, the liquid outlet 451 of the pump 45 is connected to the first port 411, and the first port 411 may be located in the working layer 3, or preferably located in the circulation In layer 2, the invention is not limited. 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 pipe 41, and the circulation speed can be increased by driving the pump 45, and the speed of taking away heat is also 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 area occupied by the immersion cooling system.

The circulation cooling module 4 may also 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 is connected to the first port 411 . The check valve 46 can prevent the first working fluid L1 in the circulation line 41 from entering the chamber S through the first port 411. Therefore, 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. 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 liquid L1 or/and the second working liquid L2 can be condensed into a liquid state here, and then flow back to the circulation layer 2 or/and The working layer 3.

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

As mentioned above, the position of the second port 412 in the chamber S is not limited by the present invention. In this embodiment, the second port 412 can be located in the circulation layer 2, so that the circulation pipeline 41 The first working fluid L1 that is refluxing directly flows into the circulation layer 2, thereby increasing the replenishing speed of the first working fluid L1.

Please refer to Figure 4, which is a 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 12 to contact the external environment, thereby cooling the first working fluid L1 in the condensation section 41b. In this way, the overall volume of the immersion cooling system is reduced. 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 simultaneously uses the first working fluid and the second working fluid to perform cooling work, and the first working fluid, which is more expensive and has better heat exchange performance, only It is used for heat exchange in the circulation pipeline. Therefore, the user can significantly reduce the usage of the first working fluid, thereby saving considerable costs. In addition, the circulation pipeline can be combined with the heat sink, 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 using the above-mentioned preferred embodiments, they are not intended to limit the invention. Anyone skilled in the art can make various changes and modifications to the above-described embodiments without departing from the spirit and scope of the invention. The technical scope protected by the invention, therefore, the scope of protection of the invention shall be determined by the appended patent application scope.

1:Sealing groove 11:Cylinder 111:Open your mouth 12: Cover 2: Loop layer 3: Working layer 4: Circulation cooling module 41:Circulation pipeline 41a: Endothermic section 41b: Condensation section 41c: Return section 411: first port 412: Second port 413:Through hole 42: Radiator 43:Fan 44:Water block 441:Tank 442:Heat absorbing 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: first working fluid L2: Second working fluid S: Chamber

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

1:Sealing groove

11:Cylinder

111:Open your mouth

12: Cover

2: Loop layer

3: Working layer

4: Circulation cooling module

41:Circulation pipeline

41a: Endothermic section

41b: Condensation section

41c: Return section

411: first port

412: Second port

42: Radiator

43:Fan

5: Air layer

E: Electrical unit

H: heat source

L1: first working fluid

L2: Second working fluid

S: Chamber

Claims (23)

An immersion cooling system containing: a sealing groove with a chamber; A circulation layer is 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 the boiling point of the first working fluid. 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 each other, the circulation layer and the working layer are adjacent to each other; and A circulation cooling module has a circulation 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 is connected to the first working fluid, the heat absorption 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 first working fluid has a boiling point lower than 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 both the first working fluid and the second working fluid are non-conductive liquids. Such as 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 circulation cooling module further has a plurality of heat sinks, and the heat sinks are combined with the condensation section. The immersion cooling system of claim 6, wherein the circulation 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 circulation cooling module has a check valve located between the condensation section and the second port, and the outlet of the check valve is connected to 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 circulation 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 holding tank, and the fluid of the circulation layer is connected with the holding tank, 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 is connected to 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 circulation cooling module has a check valve located between the heat absorption section and the first port, and the inlet of the check valve is connected to the first port. The immersion cooling system of claim 1, wherein the circulation cooling module also has a plurality of heat sinks, the heat sinks are combined with the outer surface of the circulation pipe, and the heat sinks are located in the working layer. For example, the immersion cooling system of claim 1 further includes an air layer formed in the chamber by the air in the chamber, and the circulation cooling module further has a plurality of heat sinks, and the heat sinks are combined with the circulation On the outer surface of the pipe, the heat sink 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 blended with a fat-soluble dye. The immersion cooling system of any one of claims 1 to 22 further includes at least one electrical unit, the electrical unit has at least one heat source, and the heat source is located in the working layer.

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