Immersed liquid cooling system

Abstract

The utility model relates to the technical field of liquid cooling, and discloses an immersed liquid cooling system, which comprises a liquid storage tank, a liquid supply pump, a liquid return pump and a cabinet. The cabinet is internally provided with an accommodating cavity in a closed state, and the accommodating cavity is used for being filled with cooling liquid, so that the heating element is immersed in the cooling liquid. The liquid storage tank is communicated with the containing cavity through a liquid supply pipeline and a liquid return pipeline, the liquid supply pump is arranged on the liquid supply pipeline, the liquid return pump is arranged on the liquid return pipeline, the liquid supply pump is used for driving the cooling liquid in the liquid storage tank to flow to the containing cavity through the liquid supply pipeline, and the liquid return pump is used for driving the cooling liquid in the containing cavity to flow to the liquid storage tank through the liquid return pipeline. The liquid supply pump is further used for controlling the liquid supply pressure of the containing cavity, and the liquid return pump is further used for controlling the liquid return pressure of the containing cavity. The immersed liquid cooling system disclosed by the utility model not only can solve the problem that the cooling liquid overflows, but also can avoid the deformation of the cabinet caused by overlarge pressure.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling technology, and in particular to an immersion liquid cooling system. Background Technology

[0002] With the rapid development of semiconductor technology, chip power consumption is increasing, which also means that the heat dissipation requirements for chips are becoming increasingly demanding. Thanks to the excellent thermal conductivity of liquids, immersion liquid cooling is being used more and more widely in the data center industry and some edge computing applications to meet the heat dissipation needs of high power consumption.

[0003] Currently, immersion liquid cooling systems generally employ an open design, meaning the server rack is an open container in which the servers are placed. When these systems are deployed in transportation environments such as ships and railways, tilting and vibration can cause the rack to tilt or sway, leading to coolant overflow and loss. Conversely, designing the rack as a closed structure is problematic, as racks are typically square containers welded from stainless steel, making them prone to deformation under pressure, which is also detrimental to the normal operation of the immersion liquid cooling system. Utility Model Content

[0004] This invention provides an immersion liquid cooling system that not only solves the problem of coolant overflow but also prevents the cabinet from deforming due to excessive pressure.

[0005] This utility model provides an immersion liquid cooling system, including a liquid storage tank, a liquid supply pump, a liquid return pump, and a cabinet;

[0006] The cabinet has a sealed cavity inside, which is used to fill coolant so that the heating element is immersed in the coolant;

[0007] The liquid storage tank is connected to the accommodating cavity via a liquid supply line and a liquid return line. The liquid supply pump is installed in the liquid supply line, and the liquid return pump is installed in the liquid return line. The liquid supply pump is used to drive the coolant in the liquid storage tank to flow to the accommodating cavity through the liquid supply line, and the liquid return pump is used to drive the coolant in the accommodating cavity to flow to the liquid storage tank through the liquid return line.

[0008] The liquid supply pump is also used to control the liquid supply pressure of the accommodating cavity, and the liquid return pump is also used to control the liquid return pressure of the accommodating cavity.

[0009] This utility model provides an immersion liquid cooling system with a sealed internal cavity design for the server rack, where the heating elements are submerged in coolant. This prevents coolant overflow when the rack tilts or shakes, minimizing coolant loss. The sealed cavity design also allows for maximum coolant filling, ensuring the heating elements remain submerged even during rack tilting or shaking, thus maintaining optimal heat exchange. Alternatively, filling the cavity completely reduces or eliminates coolant sloshing and uneven coolant levels. Furthermore, separate supply and return pumps separate the coolant supply and return processes. Controlling the frequency of these pumps allows for independent control of the supply and return pressures, maintaining the internal pressure at approximately atmospheric pressure and preventing excessive stress on the rack. Therefore, the immersion liquid cooling system in this invention can not only solve the problem of coolant overflow, but also prevent the cabinet from deforming due to high pressure.

[0010] In some possible implementations, the immersion liquid cooling system further includes a heat exchanger disposed between the liquid storage tank and the cabinet, and the heat exchanger is connected to the accommodating cavity via the liquid supply pipeline.

[0011] In some possible implementations, there are multiple cabinets;

[0012] The liquid supply pipeline includes a main liquid supply pipe and liquid supply branches corresponding to each of the multiple cabinets. The main liquid supply pipe is connected to the liquid storage tank, each of the liquid supply branches is connected to the main liquid supply pipe, and each cabinet is connected to the liquid supply branch.

[0013] The return pipeline includes a main return pipeline and return branch pipelines corresponding to each of the multiple cabinets. Each return branch pipeline is connected to the main return pipeline, and each cabinet is connected to the return branch pipeline.

[0014] The liquid supply pump is located on the liquid supply main pipe, and the liquid return pump is located on the liquid return main pipe.

[0015] In some possible implementations, at least a portion of the coolant supply branch and coolant return branch connected to the cabinet are respectively provided with a first regulating valve and a second regulating valve. The first regulating valve is used to regulate the pressure of the coolant flowing into the accommodating cavity, and the second regulating valve is used to regulate the pressure of the coolant flowing out of the accommodating cavity.

[0016] In some possible implementations, the immersion liquid cooling system further includes a first pressure sensor and a second pressure sensor corresponding to each cabinet. The first pressure sensor is used to detect the liquid supply pressure of the accommodating cavity, and the second pressure sensor is used to detect the liquid return pressure of the accommodating cavity.

[0017] The supply pump is used to adjust the supply frequency according to the supply pressure detected by the first pressure sensor, and the return pump is used to adjust the return frequency according to the return pressure detected by the second pressure sensor.

[0018] In some possible implementations, the cabinet is equipped with a safety valve that communicates with the accommodating cavity.

[0019] In some possible implementations, a first liquid level sensor is provided in the accommodating cavity, which is used to detect the level of coolant in the accommodating cavity.

[0020] In some possible implementations, a second liquid level sensor is provided in the liquid storage tank for detecting the level of coolant in the liquid storage tank.

[0021] In some possible implementations, the cabinet is equipped with a temperature sensor for detecting the temperature of the coolant within the accommodating cavity.

[0022] In some possible implementations, the cabinet is provided with an exhaust valve that communicates with the accommodating cavity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a submersible liquid cooling system in an embodiment of the present invention;

[0024] Figure 2 This is another structural schematic diagram of the immersion liquid cooling system in this utility model embodiment;

[0025] Figure 3 This is another structural schematic diagram of the immersion liquid cooling system in this utility model embodiment;

[0026] Figure 4 This is another structural schematic diagram of the immersion liquid cooling system in the embodiments of this utility model.

[0027] In the picture:

[0028] 100 - Storage tank; 110 - Second liquid level sensor; 200 - Supply pump; 300 - Return pump; 400, 400a, 400b, 400c - Cabinet; 401 - Receptacle; 410 - First liquid level sensor; 420 - Safety valve; 430 - Third pressure sensor; 440 - Exhaust valve; 450 - Temperature sensor; 460 - First pressure sensor; 470 - Second pressure sensor; 480 - Drain valve; 500 - Supply pipeline; 510 - Supply main pipeline; 520 - Supply branch pipeline; 530 - Supply intermediate pipeline; 600 - Return pipeline; 610 - Return main pipeline; 620 - Return branch pipeline; 630 - Return intermediate pipeline; 700 - Heat exchanger; 800 - First regulating valve; 900 - Second regulating valve. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] refer to Figure 1 The immersion liquid cooling system in this embodiment may include a liquid storage tank 100, a liquid supply pump 200, a liquid return pump 300, and a cabinet 400. The liquid storage tank 100 can be used to store the coolant of the system. The cabinet 400 can be connected to the liquid storage tank 100 through the liquid supply pump 200 and the liquid return pump 300, so that the coolant can circulate between the cabinet 400 and the liquid storage tank 100 through the liquid supply pump 200 and the liquid return pump 300.

[0031] Specifically, the cabinet 400 has a sealed cavity 401 inside, which can be filled with coolant. The heating element can be immersed in the coolant so that the coolant can exchange heat with the heating element to cool it down. In a specific implementation, the heating element can be, for example, a server.

[0032] Continue to refer to Figure 1The coolant reservoir 100 is connected to the receiving cavity 401 via a supply line 500. A supply pump 200 is installed in the supply line 500, allowing the coolant in the reservoir 100 to flow into the receiving cavity 401 through the supply line 500 under the drive of the supply pump 200. The reservoir 100 is also connected to the receiving cavity 401 via a return line 600, with a return pump 300 installed in the return line 600, allowing the coolant in the receiving cavity 401 to flow back into the reservoir 100 under the drive of the return pump 300. Furthermore, the supply pump 200 can also be used to control the supply pressure of the receiving cavity 401, and the return pump 300 can also be used to control the return pressure of the receiving cavity 401.

[0033] The coolant in the reservoir 100 can enter the accommodating cavity 401 driven by the supply pump 200. During normal operation, the heating element in the accommodating cavity 401 generates heat. At this time, the coolant entering the accommodating cavity 401 can exchange heat with the heating element, thereby cooling the heating element. The coolant temperature rises after absorbing heat, and the heated coolant can flow back to the reservoir 100 driven by the return pump 300. In this way, while completing the heat exchange with the heating element, the pressure inside the accommodating cavity 401 can also be kept stable.

[0034] It should be understood that in this embodiment, the immersion liquid cooling system designs the accommodating cavity 401 within the cabinet 400 as a sealed structure. When the coolant is filled in the accommodating cavity 401, even if the cabinet 400 tilts or shakes under external force, the coolant will not overflow, thus avoiding coolant loss. Furthermore, a supply pump 200 and a return pump 300 are provided. The supply pump 200 provides circulation power for the coolant while also controlling the supply pressure of the accommodating cavity 401, and the return pump 300 provides circulation power for the coolant while also controlling the return pressure of the accommodating cavity 401. In this way, the liquid supply and return of the cabinet 400 can be controlled separately. Furthermore, the liquid supply pump 200 and the liquid return pump 300 can be used to control the liquid supply pressure and return pressure of the accommodating cavity 401 respectively, keeping the pressure inside the accommodating cavity 401 at around atmospheric pressure. That is, the internal and external pressures of the cabinet 400 are similar, which can effectively prevent the cabinet 400 from deforming due to excessive pressure.

[0035] It is worth mentioning that, in this embodiment, the internal cavity 401 of the rack 400 is completely sealed during normal operation. However, in actual use, when stainless steel is welded into a square container to form a rack structure, the rack 400 itself is not completely welded shut due to the need for regular server maintenance and the connection of cables such as network cables and power cords. Specifically, exemplarily, the rack 400 may include a cabinet body and a top cover. During normal operation of the rack 400, the top cover can be closed onto the cabinet body, and the top cover and the cabinet body remain relatively fixed. The top cover and the cabinet body can also be sealed with a sealing strip, thereby ensuring that the internal cavity 401 of the rack 400 can be sealed, thus completely isolating the cavity 401 from the atmosphere and preventing the coolant in the cavity 401 from spraying out. When the server inside the accommodating cavity 401 needs maintenance, the supply pump 200 and return pump 300 can be stopped, and then the top cover can be separated from the cabinet to facilitate the removal of the server from the accommodating cavity 401.

[0036] The cabinet can also be equipped with an adapter board, through which network cables, power cables, and other cables connected to the server can pass to connect to external devices. In this way, while ensuring the normal operation of the server, the airtightness of the accommodating cavity 401 can also be guaranteed.

[0037] Furthermore, when the rack 400 is operating normally, the coolant can fill the receiving cavity 401. Since the coolant will not overflow, the receiving cavity 401 will remain full of coolant regardless of whether the rack 400 tilts or shakes during operation. Thus, even if the rack 400 tilts, causing a change in the relative position of the coolant level in the receiving cavity 401 and the server, no part of the server will be exposed to coolant, preventing poor heat dissipation and thus better ensuring the server's cooling performance.

[0038] Of course, in practical applications, the coolant in the accommodating cavity 401 may not be completely full. In this case, to ensure that the server remains submerged in coolant when the rack 400 is tilted or shaking, the coolant level can be close to the top of the rack 400 when it is in a normal position. This reduces the impact of coolant level changes when the rack 400 is tilted or shaking. For example, when the coolant does not completely fill the accommodating cavity 401, the volume of coolant can reach more than 90% of the volume of the accommodating cavity 401.

[0039] Refer again Figure 1A first liquid level sensor 410 may also be installed inside the accommodating cavity 401. This first liquid level sensor 410 can monitor the coolant level in the accommodating cavity 401 in real time to avoid insufficient coolant. When the coolant level in the accommodating cavity 401 is detected to be lower than a preset value, coolant can be added to the accommodating cavity 401 in a timely manner to ensure the heat exchange effect on the server.

[0040] Continue to refer to Figure 1 The immersion liquid cooling system in this embodiment may further include a heat exchanger 700, which can be disposed between the liquid storage tank 100 and the server rack 400. Before the coolant in the liquid storage tank 100 flows into the server rack 400, it passes through the heat exchanger 700, which exchanges heat with the coolant in the liquid storage tank 100, thereby reducing the temperature of the coolant and ensuring that the coolant entering the server rack 400 is at a low temperature. In this way, when the low-temperature coolant enters the server rack 400, it can fully exchange heat with the server in the server rack 400 to achieve a better heat exchange effect.

[0041] The heat exchanger 700 can be, for example, a plate heat exchanger, or it can be a finned structure, etc. In practical applications, there is no limitation on the specific form of the heat exchanger 700.

[0042] In some embodiments, reference Figure 2 There can be multiple cabinets 400, and the multiple cabinets 400 are connected in parallel. That is, the coolant tank 100 can supply coolant to each cabinet 400 at the same time, so that the coolant in each cabinet 400 can circulate at the same time.

[0043] As an optional implementation, the liquid supply pipeline 500 may include a main liquid supply pipe 510 and liquid supply branches 520 corresponding to multiple cabinets 400. The main liquid supply pipe 510 is connected to the liquid storage tank 100, and the liquid supply pump 200 and the heat exchanger 700 may be installed on the main liquid supply pipe 510. The two ends of each liquid supply branch 520 may be connected to the main liquid supply pipe 510 and the corresponding cabinet 400, respectively, so that the coolant in the liquid storage tank 100 flows into each cabinet 400 through each liquid supply branch 520 after exchanging heat with the heat exchanger 700.

[0044] Similarly, the return line 600 may include a main return line 610 and return branch lines 620 corresponding to each of the multiple cabinets 400. The main return line 610 is connected to the storage tank 100, and the return pump 300 may be installed on the main return line 610. The two ends of each return branch line 620 may be connected to the storage tank 100 and the corresponding cabinet 400, respectively. The coolant in each cabinet 400 may flow into the main return line 610 through the return branch line 620 and then flow back to the storage tank 100.

[0045] Furthermore, the supply coolant branch 520 can be connected to the bottom of the rack 400, and the return coolant branch 620 can be connected to the top of the rack 400. After the coolant in the rack 400 exchanges heat with the server, its temperature rises, while the coolant flowing into the rack 400 is cooler. The hotter coolant can flow upwards and then out through the return coolant branch 620. This ensures a stable flow direction for the coolant in the rack 400, preventing turbulent flow that could affect the server's cooling performance.

[0046] In this embodiment, reference continues to be made to Figure 2 The supply pump 200 and return pump 300 are respectively installed on the supply main pipe 510 and return main pipe 610. Since the cabinets 400 are connected in parallel, to ensure that the supply and return pressures of each cabinet 400 remain consistent, at least a portion of the supply branch 520 and return branch 620 connected to the cabinets 400 are equipped with a first regulating valve 800 and a second regulating valve 900, respectively. The first regulating valve 800 can be used to regulate the pressure of the coolant flowing into the cabinet 400 from the supply branch 520, and the second regulating valve 900 can be used to regulate the pressure of the coolant flowing out of the cabinet 400 from the return branch 620, thereby ensuring pressure stability in each cabinet 400.

[0047] In practice, the different distances between each cabinet 400 and the liquid storage tank 100 mean that the lengths of the pipes connected to each cabinet 400 are different. Furthermore, the supply and return pressures of each cabinet 400 will also differ due to the influence of valves or elbows on different pipes. In this case, the supply and return pressures of each cabinet 400 can be adjusted by regulating the opening of the first regulating valve 800 and the second regulating valve 900, thereby ensuring that the pressure in each cabinet 400 is consistent.

[0048] As an alternative implementation scheme, such as Figure 2 As shown, each liquid supply branch 520 and return branch 620 can be equipped with a first regulating valve 800 and a second regulating valve 900, respectively. Furthermore, each cabinet 400 is equipped with a first pressure sensor 460 and a second pressure sensor 470. The first pressure sensor 460 can be used to detect the liquid supply pressure of the accommodating cavity 401, and the second pressure sensor 470 can be used to detect the liquid return pressure of the accommodating cavity 401. Additionally, the first regulating valve 800 and the second regulating valve 900 can also be electrically operated. During normal operation of the immersion liquid cooling system in this embodiment, the first pressure sensor 460 and the second pressure sensor 470 can detect the liquid supply pressure and return pressure of each accommodating cavity 401 in real time. The first regulating valve 800 and the second regulating valve 900 can adjust their opening degree according to the real-time detected pressure value, thereby adjusting the liquid supply pressure and return pressure.

[0049] Furthermore, when controlling the supply pressure of the accommodating cavity 401, the supply pump 200 can adjust its supply frequency based on the inlet pressure of the accommodating cavity 401 detected by the first pressure sensor 460, thereby regulating the coolant flow rate. Similarly, when controlling the return pressure of the accommodating cavity 401, the return pump 300 can adjust its return frequency based on the return pressure of the accommodating cavity 401 detected by the second pressure sensor 470, thereby regulating the coolant flow rate.

[0050] When multiple 400 racks are set up in parallel, Figure 2 For example, if there are three cabinets 400, then cabinet 400a is located at the beginning of the system, cabinet 400b is located in the middle of the system, and cabinet 400c is located at the end of the system. When the supply pump 200 pumps the coolant from the storage tank 100 into cabinets 400a, 400b, and 400c respectively, the coolant entering cabinet 400a needs to overcome the least friction resistance, while the coolant entering cabinet 400c needs to overcome the most friction resistance. To ensure consistent inlet pressure in each cabinet 400, the opening of the first regulating valve 800 of cabinet 400a can be smaller, the opening of the first regulating valve 800 of cabinet 400c can be larger, and the opening of the first regulating valve 800 of cabinet 400b is between the openings of the first regulating valves 800 of cabinet 400a and cabinet 400c.

[0051] Alternatively, as another optional implementation scheme, refer to Figure 3 The cabinet 400c located at the very end of the system may not be equipped with the first regulating valve 800 and the second regulating valve 900, while the cabinets 400 on other branches may be equipped with the first regulating valve 800 and the second regulating valve 900 respectively. Since the supply and return pressures of the cabinet 400c at the very end need to overcome the greatest friction resistance, the supply and return pressures of this cabinet 400c can be used as reference values. The supply and return pressures of the cabinets 400 on other branches can be moderately adjusted by the opening of the first regulating valve 800 and the second regulating valve 900 to maintain pressure stability.

[0052] Furthermore, refer again Figure 2 The cabinet 400 can also be equipped with a third pressure sensor 430, which can be used to detect the pressure in the accommodating cavity 401 to ensure that the pressure in the accommodating cavity 401 is not too high or too low, thereby ensuring that the cabinet 400 will not deform.

[0053] The cabinet 400 may also be equipped with a safety valve 420, which is connected to the accommodating cavity 401. When the pressure in the accommodating cavity 401 exceeds the limit value, the safety valve 420 can automatically release to relieve the pressure in the cabinet 400 and ensure that the cabinet 400 does not deform. In addition, the cabinet 400 may also be equipped with an exhaust valve 440, which is connected to the accommodating cavity 401. When the cabinet 400 is operating normally, the exhaust valve 440 can open in a timely manner according to the pressure value detected by the third pressure sensor 430 to release the gas inside the cabinet 400, thereby ensuring the stability of the internal pressure of the cabinet 400.

[0054] The rack 400 may also be equipped with a drain valve 480, which may be located near the bottom of the rack 400. When maintenance is required on the servers in the rack 400, the coolant in the rack 400 can be drained through the drain valve 480 to facilitate the removal of the servers from the rack 400.

[0055] Based on this, combined Figure 2 Let P1 be the maximum positive pressure that rack 400 can withstand, and P2 be the maximum negative pressure that rack 400 can withstand. 箱 This refers to the pressure inside rack 400. When the internal pressure P inside rack 400... 箱 The pressure satisfies P1 > P 箱 At P2, the cabinet 400 will not experience leakage or unacceptable deformation.

[0056] Set P 供 For the liquid supply pressure of rack 400, P 回 The return pressure is for cabinet 400. During normal system operation, supply pump 200 and return pump 300 start simultaneously. The frequency of supply pump 200 is controlled by the supply pressure, and the frequency of return pump 300 is controlled by the return pressure. At this time, the supply and return pressures of cabinet 400c, located at the very end of the system, need to meet P... 供 <P1, P 回 >P2. The supply and return pressures of cabinets 400 located on other branches can be controlled by the first regulating valve 800 and the second regulating valve 900 of the corresponding branch. By slightly reducing the pressure of the regulating valves, each cabinet 400 can meet P2. 供 <P1, P 回 >P2.

[0057] When the pressure P inside the cabinet is 400 箱 Once the pressure exceeds P1, safety valve 420 opens to release pressure and prevent cabinet 400 from deforming. When the pressure P inside cabinet 400... 箱 After the value is less than P2, the frequency of the return pump 300 can be reduced to prevent the cabinet 400 from being sucked down.

[0058] In some embodiments, continue to refer to Figure 2 A temperature sensor 450 may also be installed in the rack 400 to detect the temperature of the coolant in the accommodating cavity 401. When controlling the frequency of the supply pump 200 and the return pump 300, the flow rate of the coolant in each rack 400 can be adjusted according to the heat exchange status of the coolant in the rack 400, so that the temperature of the coolant in the rack 400 can be controlled within a preset range. For example, when it is necessary to improve the heat exchange efficiency of the coolant in the rack 400, the frequency of the supply pump 200 and the return pump 300 can be increased simultaneously to increase the flow rate of the coolant in each rack 400, thereby reducing the temperature of the servers in the rack 400.

[0059] In addition, the coolant tank 100 can be connected to the atmosphere so that it can be kept at normal pressure. Furthermore, a second liquid level sensor 110 can be installed inside the coolant tank 100. The second liquid level sensor 110 can be used to detect the coolant level in the coolant tank 100 in real time. When the coolant level is lower than a preset value, coolant can be added to the coolant tank 100 in a timely manner to meet the circulation flow rate of the coolant in the system.

[0060] In some embodiments, reference Figure 4 In practical applications, to adapt to different usage scenarios, the liquid supply line 500 may further include a liquid supply intermediate line 530, and the liquid return line 600 may further include a liquid return intermediate line 630. The liquid supply intermediate line 530 is connected to the liquid supply main line 510, and the liquid return intermediate line 630 is connected to the liquid return main line 610. Two or more cabinets 400 can be connected to the liquid supply intermediate line 530 through a liquid supply branch line 520, and to the liquid return intermediate line 630 through a liquid return branch line 620, so that different cabinets 400 can be connected to the liquid supply main line 510 and the liquid return main line 610. In this case, by setting up the liquid supply intermediate line 530 and the liquid return intermediate line 630, the arrangement of cabinets 400 in different spaces can be adapted. While realizing the parallel setting of each cabinet 400, it is also convenient to arrange cabinets 400 of different heights.

[0061] It is worth mentioning that when multiple cabinets 400 are arranged at different heights, the liquid surface will not be uneven because the accommodating cavity 401 inside the cabinet 400 in this embodiment is a closed design.

[0062] In this embodiment, since a liquid supply intermediate pipeline 530 and a liquid return intermediate pipeline 630 are provided, as an optional implementation, if the number of cabinets 400 connected to the same liquid supply intermediate pipeline 530 is small (e.g., Figure 4When there are two (as shown in the diagram), the supply pressure of the two cabinets 400 connected to the intermediate supply pipeline 530 is approximately the same. The first regulating valve 800 and the second regulating valve 900 can also be respectively installed on the intermediate supply pipeline 530 and the intermediate return pipeline 630. This allows the first regulating valve 800 to simultaneously regulate the supply pressure of both cabinets 400, and the second regulating valve 900 to simultaneously regulate the return pressure of both cabinets 400. This reduces the number of valves and decreases the friction resistance that the supply and return pressures of the cabinets 400 need to overcome.

[0063] Based on this, the control methods of the supply pump 200, return pump 300, first regulating valve 800, and second regulating valve 900 are the same as those of... Figure 2 The control method is the same as in the previous one, so it will not be repeated here.

[0064] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An immersion liquid cooling system, characterized in that, This includes a liquid storage tank, a liquid supply pump, a liquid return pump, and a cabinet; The cabinet has a sealed cavity inside, which is filled with coolant so that the heating element is submerged in the coolant. The liquid storage tank is connected to the accommodating cavity via a liquid supply line and a liquid return line. The liquid supply pump is installed in the liquid supply line, and the liquid return pump is installed in the liquid return line. The liquid supply pump is used to drive the coolant in the liquid storage tank to flow to the accommodating cavity through the liquid supply line, and the liquid return pump is used to drive the coolant in the accommodating cavity to flow to the liquid storage tank through the liquid return line. The liquid supply pump is also used to control the liquid supply pressure of the accommodating cavity, and the liquid return pump is also used to control the liquid return pressure of the accommodating cavity.

2. The immersion liquid cooling system according to claim 1, characterized in that, It also includes a heat exchanger, which is disposed between the liquid storage tank and the cabinet, and the heat exchanger is connected to the accommodating cavity through the liquid supply pipeline.

3. The immersion liquid cooling system according to claim 1, characterized in that, There are multiple cabinets; The liquid supply pipeline includes a main liquid supply pipe and liquid supply branches corresponding to each of the multiple cabinets. The main liquid supply pipe is connected to the liquid storage tank, each of the liquid supply branches is connected to the main liquid supply pipe, and each cabinet is connected to the liquid supply branch. The return pipeline includes a main return pipeline and return branch pipelines corresponding to each of the multiple cabinets. Each return branch pipeline is connected to the main return pipeline, and each cabinet is connected to the return branch pipeline. The liquid supply pump is located on the liquid supply main pipe, and the liquid return pump is located on the liquid return main pipe.

4. The immersion liquid cooling system according to claim 3, characterized in that, At least a portion of the coolant supply branch and coolant return branch connected to the cabinet are respectively provided with a first regulating valve and a second regulating valve. The first regulating valve is used to regulate the pressure of the coolant flowing into the accommodating cavity, and the second regulating valve is used to regulate the pressure of the coolant flowing out of the accommodating cavity.

5. The immersion liquid cooling system according to claim 4, characterized in that, It also includes a first pressure sensor and a second pressure sensor that are configured one-to-one with each cabinet. The first pressure sensor is used to detect the liquid supply pressure of the accommodating cavity, and the second pressure sensor is used to detect the liquid return pressure of the accommodating cavity. The supply pump is used to adjust the supply frequency according to the supply pressure detected by the first pressure sensor, and the return pump is used to adjust the return frequency according to the return pressure detected by the second pressure sensor.

6. The immersion liquid cooling system according to claim 1, characterized in that, The cabinet is equipped with a safety valve, which is connected to the accommodating cavity.

7. The immersion liquid cooling system according to claim 1, characterized in that, The accommodating cavity is equipped with a first liquid level sensor, which is used to detect the level of coolant in the accommodating cavity.

8. The immersion liquid cooling system according to claim 1, characterized in that, The storage tank is equipped with a second liquid level sensor, which is used to detect the level of coolant in the storage tank.

9. The immersion liquid cooling system according to claim 1, characterized in that, The cabinet is equipped with a temperature sensor, which is used to detect the temperature of the coolant in the accommodating cavity.

10. The immersion liquid cooling system according to any one of claims 1 to 9, characterized in that, The cabinet is equipped with an exhaust valve, which is connected to the accommodating cavity.

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