Immersed liquid cooling system and method

Abstract

The invention discloses an immersed liquid cooling system and method. The immersed liquid cooling system comprises a cooling box, a dry cooling module and a mechanical refrigeration module. The cooling device is provided with two sets of cooling assemblies, when one set of cooling assembly breaks down, the other set of cooling assembly can also conduct refrigeration operation, the requirement for continuous operation of heating equipment is met, and the cooling reliability is improved. Meanwhile, due to the fact that the liquid cooling system has better heat exchange performance, the operating temperature of the liquid cooling system can be greatly improved, the liquid cooling system can be naturally cooled and operated in most of the time of a year and can be naturally cooled and operated in areas with good weather conditions, a mechanical refrigeration module does not need to be started for operation, energy consumption can be greatly reduced, and the cost is reduced. The heat exchange efficiency and the operation energy efficiency of the system are improved, and the PUE of a traditional machine room is reduced from 1.5 to 1.2 or below. In addition, as the cooling liquid can be in direct contact with the heating equipment, the heat exchange efficiency is higher, heat can be quickly absorbed, the equipment is kept running at a stable temperature, and the equipment failure rate is lower.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology for information and communication equipment, and specifically to an immersion liquid cooling system and method. Background Technology

[0002] With the rapid development of information technology, the demand for data processing and transmission in communication networks is increasing day by day. As the core nodes and edge facilities of communication networks, aggregation rooms and communication base stations have extremely high requirements for the stability of their internal equipment. In order to ensure that the equipment can still operate stably in harsh environments such as high temperature and high humidity and extend the equipment life, the air conditioning system plays a crucial role.

[0003] Currently, air conditioning solutions for aggregation rooms and communication base stations mainly include air-cooled precision air conditioners, air-cooled refrigerant pump air conditioners, and combined air-cooled air conditioners with outdoor fresh air natural cooling. However, these traditional air conditioning solutions generally suffer from high energy consumption and low operating efficiency. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide an immersion liquid cooling system and method.

[0006] The immersion liquid cooling system of this invention includes a cooling tank, a dry cooling module, and a mechanical refrigeration module. The cooling tank has a coolant inlet and a coolant outlet and is used to contain the heat-generating equipment and the coolant. The dry cooling module is connected to the coolant inlet and the coolant outlet to form a first cooling circuit, and the mechanical refrigeration module is connected to the coolant inlet and the coolant outlet to form a second cooling circuit. The first cooling circuit and the second cooling circuit are connected. The dry cooling module and the mechanical refrigeration module cooperate to allow the dry cooling module to exchange heat with the coolant flowing out of the coolant outlet using natural cooling, and / or the mechanical refrigeration module to exchange heat with the coolant flowing out of the coolant outlet using mechanical refrigeration.

[0007] In some embodiments, the dry cooling module includes a dry cooler, a dry coolant supply pipe, a dry coolant return pipe, and a dry coolant-side heat exchanger. The dry cooler, the dry coolant supply pipe, the dry coolant return pipe, and the dry coolant-side heat exchanger constitute a dry coolant circulation loop. The coolant inlet, the coolant outlet, the dry coolant-side heat exchanger, and the cooling tank constitute a first cooling loop. The dry coolant in the dry coolant circulation loop exchanges heat with the coolant in the first cooling loop within the dry coolant-side heat exchanger.

[0008] In some embodiments, the mechanical refrigeration module includes a compressor, a refrigerant supply pipe, a refrigerant return pipe, a condenser, and a refrigeration-side heat exchanger. The compressor, the refrigerant supply pipe, the refrigerant return pipe, the condenser, and the refrigeration-side heat exchanger constitute a refrigerant circulation loop. The coolant inlet, the coolant outlet, the refrigeration-side heat exchanger, and the cooling tank constitute a second cooling loop. The refrigerant in the refrigerant circulation loop exchanges heat with the refrigerant in the second cooling loop within the refrigeration-side heat exchanger.

[0009] In some embodiments, a first pipeline is provided between the coolant outlet and the dry-cooled side heat exchanger, and a second pipeline is provided between the coolant inlet and the dry-cooled side heat exchanger. A first valve is provided on the first pipeline, and a second valve is provided on the second pipeline. A third pipeline is provided between the coolant outlet and the refrigeration-side heat exchanger, and a fourth pipeline is provided between the coolant inlet and the refrigeration-side heat exchanger. A third valve is provided on the third pipeline, and a connecting pipe is provided between the third pipeline and the second pipeline. The first end of the connecting pipe is located between the dry-cooling-side heat exchanger and the second valve, and the second end of the connecting pipe is located between the refrigeration-side heat exchanger and the third valve. A fourth valve is provided on the connecting pipe.

[0010] In some embodiments, a first circulation pump is provided on the first pipeline.

[0011] In some embodiments, there are at least two first circulation pumps connected in parallel on the first pipeline.

[0012] In some embodiments, a second circulation pump is provided on the dry coolant circulation loop.

[0013] In some embodiments, the refrigerant supply pipe is provided with an expansion valve.

[0014] In some embodiments, the dry cooler includes a housing and a fan, the housing being used to contain dry coolant, and the fan being disposed in the housing and used to cool the dry coolant inside the housing.

[0015] The immersion liquid cooling method of this invention, applied to the immersion liquid cooling system described in any of the above embodiments, includes: When the temperature of the coolant in the cooling tank is lower than the first preset value, the dry cooling module exchanges heat with the coolant flowing out of the coolant outlet separately. When the temperature of the coolant in the cooling tank is greater than the first preset value and less than the second preset value, the dry cooling module and the mechanical refrigeration module exchange heat with the coolant flowing out of the coolant outlet. When the temperature of the coolant in the cooling tank is greater than the second preset value, the mechanical refrigeration module exchanges heat with the coolant flowing out of the coolant outlet separately.

[0016] The immersion liquid cooling system and method of this invention have two sets of cooling components. If one set fails, the other can still operate, meeting the uninterrupted operation requirements of heat-generating equipment and improving cooling reliability. Simultaneously, due to the better heat exchange performance of the liquid cooling system, its operating temperature can be significantly increased. This increased operating temperature allows the liquid cooling system to operate naturally for most of the year, and in areas with favorable climates, it can operate naturally year-round without the need to activate the mechanical refrigeration module. This greatly reduces energy consumption and improves system heat exchange efficiency and operational energy efficiency, lowering the PUE of traditional data centers from 1.5 to below 1.2. Furthermore, because the coolant can directly contact the heat-generating equipment, the heat exchange efficiency is higher, enabling rapid heat absorption and maintaining stable equipment operation at a lower temperature, resulting in a lower equipment failure rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an immersion liquid cooling system according to an embodiment of the present invention.

[0018] Figure label: 100. Immersion Liquid Cooling System; 1. Cooling Tank; 101. Coolant Inlet; 102. Coolant Outlet; 2. Dry Cooling Module; 201. Dry Cooler; 2011. Housing; 2012. Fan; 202. Dry Coolant Supply Pipe; 203. Dry Coolant Return Pipe; 204. Dry Cooling Side Heat Exchanger; 3. Mechanical Refrigeration Module; 301. Compressor; 302. Refrigerant Supply Pipe; 303. Refrigerant Return Pipe; 304. Condenser; 305. Refrigeration Side Heat Exchanger; 4. First Pipeline; 5. Second Pipeline; 6. First Valve; 7. Second Valve; 8. Third Pipeline; 9. Fourth Pipeline; 10. Third Valve; 11. Connecting Pipe; 12. Fourth Valve; 13. First Circulation Pump; 14. Second Circulation Pump; 15. Expansion Valve. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figure 1As shown, the immersion liquid cooling system 100 of this embodiment includes a cooling tank 1, a dry cooling module 2, and a mechanical refrigeration module 3. The cooling tank 1 has a coolant inlet 101 and a coolant outlet 102, and is used to contain the heat-generating equipment and the coolant. The dry cooling module 2 is connected to the coolant inlet 101 and the coolant outlet 102 to form a first cooling circuit, and the mechanical refrigeration module 3 is connected to the coolant inlet 101 and the coolant outlet 102 to form a second cooling circuit. The first cooling circuit and the second cooling circuit are connected. The dry cooling module 2 and the mechanical refrigeration module 3 cooperate so that the dry cooling module 2 exchanges heat with the coolant flowing out of the coolant outlet 102 using natural cooling, and / or the mechanical refrigeration module 3 exchanges heat with the coolant flowing out of the coolant outlet 102 using mechanical refrigeration.

[0021] In use, the immersion liquid cooling system 100 of this embodiment of the invention has a cooling tank 1 as its core component, which houses heat-generating devices (such as ICT devices) and coolant. The coolant circulates inside the cooling tank 1, absorbing the heat generated by the devices and maintaining the stability of the operating environment. The coolant enters through the coolant inlet 101 of the cooling tank 1, flows through the heat-generating devices to absorb heat, and then flows out through the coolant outlet 102, forming a closed loop.

[0022] The immersion liquid cooling system 100 of this invention has the following three operating modes during operation: The first operating mode is that the dry cooling module 2 operates independently: Specifically, when the temperature of the coolant in the cooling tank 1 is lower than the first preset value, the dry cooling module 2 uses natural cooling (such as air cooling) to exchange heat with the coolant flowing out of the coolant outlet 102 to reduce the temperature of the coolant. The coolant after the temperature is reduced flows back into the cooling tank 1 through the coolant inlet 101.

[0023] The second operating mode is that the mechanical refrigeration module 3 operates independently: Specifically, when the temperature of the coolant in the cooling tank 1 is greater than the second preset value, the temperature of the coolant is too high and the dry cooling module 2 cannot meet the cooling requirements of the coolant. At this time, the mechanical refrigeration module 3 needs to operate independently and use the cooling method of the refrigerant to exchange heat with the coolant flowing out of the coolant outlet 102 to improve the heat exchange efficiency and reduce the temperature of the coolant. The coolant after the temperature is reduced flows back into the cooling tank 1 through the coolant inlet 101.

[0024] The third operating mode involves the dry cooling module 2 and the mechanical refrigeration module 3 operating simultaneously: Specifically, when the coolant temperature in the cooling tank 1 is greater than a first preset value but less than a second preset value, the dry cooling module 2 alone cannot meet the cooling requirements of the coolant, but the mechanical refrigeration module 3 does not need to operate at full load independently. In this case, the dry cooling module 2 and the mechanical refrigeration module 3 need to work together to exchange heat with the coolant flowing out of the coolant outlet 102, thereby reducing the coolant temperature. The cooled coolant then flows back into the cooling tank 1 through the coolant inlet 101. In this working mode, since the mechanical refrigeration module 3 does not need to operate at full load, system energy consumption can be reduced.

[0025] Therefore, the immersion liquid cooling system 100 of this embodiment of the invention has two sets of cooling components. If one set of cooling components fails, the other set can still operate, meeting the uninterrupted operation requirements of the heat-generating equipment and improving cooling reliability. Simultaneously, due to the better heat exchange performance of the liquid cooling system, its operating temperature can be significantly increased. This increased operating temperature allows the liquid cooling system to operate naturally for most of the year, and in areas with favorable climates, it can operate naturally year-round without needing to activate the mechanical refrigeration module 3. This greatly reduces energy consumption, improves system heat exchange efficiency and operating energy efficiency, and lowers the PUE of traditional computer rooms from 1.5 to below 1.2. Furthermore, because the coolant can directly contact the heat-generating equipment, the heat exchange efficiency is higher, enabling rapid heat absorption and maintaining stable equipment operation at a lower temperature, resulting in a lower equipment failure rate.

[0026] In some embodiments, the dry cooling module 2 includes a dry cooler 201, a dry cool liquid supply pipe 202, a dry cool liquid return pipe 203, and a dry cooling side heat exchanger 204. The dry cooler 201, the dry cool liquid supply pipe 202, the dry cool liquid return pipe 203, and the dry cooling side heat exchanger 204 constitute a dry cool liquid circulation loop. The coolant inlet 101, the coolant outlet 102, the dry cooling side heat exchanger 204, and the cooling tank 1 constitute a first cooling loop. The dry cool liquid in the dry cool liquid circulation loop exchanges heat with the coolant in the first cooling loop in the dry cooling side heat exchanger 204.

[0027] Specifically, such as Figure 1 As shown, the coolant (e.g., water) in the coolant dry cooler 201 is transported to the coolant-side heat exchanger 204 through the coolant dry coolant supply pipe 202. The coolant dry coolant flowing out of the coolant-side heat exchanger 204 flows back to the coolant dry cooler 201 through the coolant dry coolant return pipe 203 for recirculation. The coolant flowing out of the coolant outlet 102 enters the coolant-side heat exchanger 204 and flows back to the cooling tank 1 through the coolant inlet 101. The coolant circulates in this loop, absorbing the heat generated by the equipment and exchanging heat with the coolant dry coolant through the coolant-side heat exchanger 204.

[0028] The dry-cooled side heat exchanger 204 allows for effective heat exchange between the coolant and the dry-cooled liquid, improving heat exchange efficiency. The dry-cooler 201 exchanges heat with the air through its fins or heat pipes. When the ambient temperature is low, it can fully utilize the ambient temperature to lower the temperature of the dry-cooled liquid, thereby improving the overall system energy efficiency. When the ambient temperature is low, the dry-cooling module 2 can operate independently, reducing or eliminating the need for the mechanical refrigeration module 3, thus saving energy.

[0029] In some embodiments, the mechanical refrigeration module 3 includes a compressor 301, a refrigerant supply pipe 302, a refrigerant return pipe 303, a condenser 304, and a refrigeration-side heat exchanger 305. The compressor 301, refrigerant supply pipe 302, refrigerant return pipe 303, condenser 304, and refrigeration-side heat exchanger 305 constitute a refrigerant circulation loop. The coolant inlet 101, coolant outlet 102, refrigeration-side heat exchanger 305, and cooling tank 1 constitute a second cooling loop. The refrigerant in the refrigerant circulation loop exchanges heat with the refrigerant in the second cooling loop within the refrigeration-side heat exchanger 305.

[0030] Specifically, such as Figure 1 As shown, the compressor 301 compresses the refrigerant, increasing its pressure and temperature, and delivers it to the condenser 304 via the refrigerant return pipe 303, where it releases heat. The refrigerant supply pipe 302 delivers the refrigerant from the condenser 301 to the refrigeration-side heat exchanger 305, and then the refrigerant returns to the compressor 301 via the refrigerant return pipe 303. The coolant flowing out of the coolant outlet 102 passes through the refrigeration-side heat exchanger 305 and then returns to the cooling tank 1 through the coolant inlet 101. In the refrigeration-side heat exchanger 305, the refrigerant exchanges heat with the coolant in the second cooling circuit, absorbing heat from the coolant and lowering its temperature.

[0031] In high-temperature environments or under high-load conditions, the mechanical refrigeration module 3 can provide additional cooling capacity, ensuring that the coolant temperature remains within a preset range. Through precise control of the compressor 301 and the refrigeration cycle, the system can maintain a very stable coolant temperature, which is especially important for temperature-sensitive communication equipment. The refrigerant's properties allow for efficient heat exchange with small temperature differences, contributing to improved energy efficiency of the entire cooling system. Energy consumption can be reduced by controlling the refrigerant circulation when the ambient temperature is low or cooling demand is low. The mechanical refrigeration module 3 works in conjunction with the dry cooling module 2, providing redundancy and enhancing system reliability and stability. The mechanical refrigeration module 3 can dynamically adjust its operating state according to actual needs to adapt to different environmental and load conditions.

[0032] In some embodiments, a first pipeline 4 is provided between the coolant outlet 102 and the dry-cooled side heat exchanger 204, and a second pipeline 5 is provided between the coolant inlet 101 and the dry-cooled side heat exchanger 204. A first valve 6 is provided on the first pipeline 4, and a second valve 7 is provided on the second pipeline 5.

[0033] A third pipe 8 is provided between the coolant outlet 102 and the refrigeration-side heat exchanger 305, and a fourth pipe 9 is provided between the coolant inlet 101 and the refrigeration-side heat exchanger 305. A third valve 10 is provided on the third pipe 8. A connecting pipe 11 is provided between the third pipe 8 and the second pipe 5. The first end of the connecting pipe 11 is located between the dry-cooling-side heat exchanger 204 and the second valve 7, and the second end of the connecting pipe 11 is located between the refrigeration-side heat exchanger 305 and the third valve 10. A fourth valve 12 is provided on the connecting pipe 11.

[0034] Specifically, when the immersion liquid cooling system 100 of this embodiment is in the first working mode, the dry cooling module 2 operates independently. The first valve 6 and the second valve 7 are open, while the third valve 10 and the fourth valve 12 are closed. The coolant flowing out of the coolant outlet 102 passes sequentially through the first valve 6, the dry cooling side heat exchanger 204, the second valve 7, and the coolant inlet 101.

[0035] When the immersion liquid cooling system 100 of this embodiment is in the second working mode, the mechanical refrigeration module 3 operates independently. The first valve 6, the second valve 7, and the fourth valve 12 are closed, and the third valve 10 is open. The coolant flowing out of the coolant outlet 102 passes sequentially through the third valve 10, the refrigeration-side heat exchanger 305, and the coolant inlet 101.

[0036] When the immersion liquid cooling system 100 of this embodiment is in the third operating mode, the dry cooling module 2 and the mechanical refrigeration module 3 operate simultaneously. The second valve 7 and the third valve 10 are closed, while the first valve 6 and the fourth valve 12 are open. The coolant flowing out of the coolant outlet 102 passes sequentially through the first valve 6, the dry cooling side heat exchanger 204, the fourth valve 12, the refrigeration side heat exchanger 305, and the coolant inlet 101. That is, the coolant flowing out of the coolant outlet 102 exchanges heat with the dry cooling liquid once in the dry cooling side heat exchanger 204 and then undergoes a second heat exchange in the refrigeration side heat exchanger 305.

[0037] The above connection method allows for switching between different operating modes of the immersion liquid cooling system 100 of this embodiment of the invention by controlling the opening and closing of the corresponding first valve 6, second valve 7, third valve 10 and fourth valve 12, making operation simple and control convenient.

[0038] Optionally, a first circulation pump 13 is provided on the first pipeline 4. The first circulation pump 13 can provide a stable coolant flow, enhance heat exchange efficiency, and improve the overall cooling performance of the system. By adjusting the operating speed of the first circulation pump 13, the system can adapt to different load requirements and optimize the cooling effect. The first circulation pump 13 helps to reduce the thermal gradient of the coolant in the cooling tank 1, making the temperature more uniform throughout the cooling tank 1.

[0039] For example, at least two first circulation pumps 13 are connected in parallel on the first pipeline 4. The parallel configuration of the first circulation pumps 13 provides redundancy; if one pump fails, another can immediately take over, ensuring continuous system operation. This is crucial for applications with extremely high stability requirements, such as communication base stations. Under normal conditions, multiple circulation pumps can share the load, with each pump undertaking a portion of the circulation task, thereby reducing the load on individual pumps and extending their service life.

[0040] In some embodiments, a second circulation pump 14 is provided in the dry coolant circulation loop. The main function of the second circulation pump 14 is to drive the dry coolant to flow in the dry coolant circulation loop, ensuring that the dry coolant can effectively exchange heat with the coolant in the dry-cool side heat exchanger 204. By controlling the operation of the second circulation pump 14, the flow rate of the dry coolant can be adjusted to adapt to different cooling requirements and environmental conditions.

[0041] In some embodiments, an expansion valve 15 is provided on the refrigerant supply pipe 302. The main function of the expansion valve 15 is to throttle the refrigerant during circulation, reducing the pressure of the high-pressure liquid refrigerant to a low-pressure state, allowing it to evaporate and absorb heat in the evaporator. The expansion valve 15 can regulate the refrigerant flow rate, ensuring a stable evaporation process in the evaporator and preventing the refrigerant from flowing too fast or too slow, which would affect the cooling effect.

[0042] In some embodiments, the dry cooler 201 includes a housing 2011 and a fan 2012. The housing 2011 is used to contain dry coolant, and the fan 2012 is disposed in the housing 2011 and is used to cool the dry coolant in the housing 2011.

[0043] The enclosure 2011 is the starting and ending point of the coolant circulation loop, used for storing and circulating the coolant. The interior of enclosure 2011 may contain heat sinks or other cooling surfaces to increase the contact area with air and improve heat exchange efficiency. The fan 2012 uses forced convection to blow air across the heat sinks or cooling surfaces within the coolant 201, helping the coolant release heat. The operation of the fan 2012 can significantly improve the cooling efficiency of the coolant, especially at low ambient temperatures, by fully utilizing the cooling capacity of the air.

[0044] The immersion liquid cooling method of this invention, applied to the immersion liquid cooling system 100 in any of the above embodiments, includes: When the temperature of the coolant in the cooling tank 1 is lower than the first preset value, the dry cooling module 2 exchanges heat with the coolant flowing out of the coolant outlet 102 alone. When the temperature of the coolant in the cooling tank 1 is greater than the first preset value and less than the second preset value, the dry cooling module 2 and the mechanical refrigeration module 3 exchange heat with the coolant flowing out of the coolant outlet 102. When the temperature of the coolant in the cooling tank 1 is greater than the second preset value, the mechanical refrigeration module 3 exchanges heat with the coolant flowing out of the coolant outlet 102.

[0045] For example, taking the typical operating conditions as follows: the circulating coolant temperature of the cooling tank 1 is 50℃ / 55℃, the working temperature of the dry coolant in the dry cooler 201 is 45℃ / 50℃, the small temperature difference of the dry cooling side heat exchanger 204 is 5℃, and the small temperature difference between the dry cooler 201 and the outdoor temperature is 8℃.

[0046] The first operating mode is that the dry cooling module 2 operates independently: Specifically, when the temperature of the coolant in the cooling tank 1 is lower than the first preset value, for example, the first preset value is 32°C, the dry cooling module 2 uses natural cooling (such as air cooling) to exchange heat with the coolant flowing out of the coolant outlet 102 to reduce the temperature of the coolant. The coolant after the temperature is reduced flows back into the cooling tank 1 through the coolant inlet 101.

[0047] The second operating mode is that the mechanical refrigeration module 3 operates independently: Specifically, when the temperature of the coolant in the cooling tank 1 is greater than the second preset value, for example, the second preset value is 36°C, the coolant temperature is too high and the dry cooling module 2 cannot meet the cooling requirements of the coolant. At this time, the mechanical refrigeration module 3 needs to operate independently, using the refrigerant cooling method to exchange heat with the coolant flowing out of the coolant outlet 102, thereby improving the heat exchange efficiency and reducing the temperature of the coolant. The temperature after heat exchange reaches the 45°C supply temperature requirement, and the coolant after the temperature is reduced flows back into the cooling tank 1 through the coolant inlet 101.

[0048] The third operating mode involves the dry cooling module 2 and the mechanical refrigeration module 3 operating simultaneously: Specifically, when the coolant temperature in the cooling tank 1 is greater than a first preset value (e.g., 32°C) but less than a second preset value (e.g., 36°C), the dry cooling module 2 alone cannot meet the cooling requirements of the coolant. For example, the temperature after heat exchange does not reach 45°C, but the mechanical refrigeration module 3 does not need to operate at full load independently. In this case, the dry cooling module 2 needs to work in conjunction with the mechanical refrigeration module 3 to exchange heat with the coolant flowing out of the coolant outlet 102 to lower the coolant temperature. Since the temperature after heat exchange does not reach 45°C, the cooled coolant flows back into the cooling tank 1 through the coolant inlet 101. In this working mode, since the mechanical refrigeration module 3 does not need to operate at full load, the system energy consumption can be reduced.

[0049] Therefore, the immersion liquid cooling method of this invention has two sets of cooling components. If one set fails, the other can still operate, meeting the uninterrupted operation requirements of the heat-generating equipment and improving cooling reliability. Simultaneously, due to the better heat exchange performance of the liquid cooling system, its operating temperature can be significantly increased. This increased operating temperature allows the liquid cooling system to operate naturally for most of the year, and in areas with favorable climates, it can operate naturally year-round without needing to activate the mechanical refrigeration module 3, greatly reducing energy consumption and improving energy efficiency. Furthermore, because the coolant can directly contact the heat-generating equipment, the heat exchange efficiency is higher, enabling rapid heat absorption and maintaining stable equipment operation at a stable temperature, thus improving system heat exchange efficiency and operational energy efficiency.

[0050] In the immersion liquid cooling method of this embodiment of the invention, the dry cooling module 2 and the second circulation pump 14 are started first. Then the first circulation pump 13 is started to determine whether the supply temperature of the coolant inlet 101 of the cooling tank 1 meets the set temperature requirement. If the requirement is met, the system operates in the first working mode, and the dry cooling module 2 operates independently.

[0051] If the supply temperature of the coolant inlet 101 of the cooling tank 1 does not meet the set temperature requirement, then it is determined whether the supply temperature of the dry cooler 1 is greater than the return temperature of the cooling tank 1. If so, the system operates independently in the second working mode.

[0052] If the supply temperature of the coolant inlet 101 of the cooling tank 1 does not meet the temperature setting requirements, then determine whether the supply temperature of the dry cooler 1 under the set temperature difference is greater than the return temperature of the coolant 1. If not, the system operates in the third working mode, with the dry cooling module 2 and the mechanical refrigeration module 3 working together.

[0053] The immersion liquid cooling system of this invention has two refrigeration systems, which can meet the requirements of one in use and one on standby. Each refrigeration system can be maintained online, and the reliability is greatly improved compared with a single refrigeration system.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An immersion liquid cooling system, characterized in that, include: A cooling tank (1) having a coolant inlet (101) and a coolant outlet (102) is used to contain heat-generating equipment and coolant; The dry cooling module (2) and the mechanical refrigeration module (3) are connected to the coolant inlet (101) and the coolant outlet (102) to form a first cooling circuit. The mechanical refrigeration module (3) is connected to the coolant inlet (101) and the coolant outlet (102) to form a second cooling circuit. The first cooling circuit is connected to the second cooling circuit. The dry cooling module (2) and the mechanical refrigeration module (3) cooperate to allow the dry cooling module (2) to exchange heat with the coolant flowing out of the coolant outlet (102) by natural cooling, and / or the mechanical refrigeration module (3) to exchange heat with the coolant flowing out of the coolant outlet (102) by mechanical refrigeration.

2. The immersion liquid cooling system according to claim 1, characterized in that, The dry cooling module (2) includes a dry cooler (201), a dry cool liquid supply pipe (202), a dry cool liquid return pipe (203), and a dry cooling side heat exchanger (204). The dry cooler (201), the dry cool liquid supply pipe (202), the dry cool liquid return pipe (203), and the dry cooling side heat exchanger (204) constitute a dry cool liquid circulation loop. The coolant inlet (101), the coolant outlet (102), the dry cooling side heat exchanger (204), and the cooling tank (1) constitute the first cooling loop. The dry cool liquid in the dry cool liquid circulation loop exchanges heat with the coolant in the first cooling loop in the dry cooling side heat exchanger (204).

3. The immersion liquid cooling system according to claim 2, characterized in that, The mechanical refrigeration module (3) includes a compressor (301), a refrigerant supply pipe (302), a refrigerant return pipe (303), a condenser (304), and a refrigeration-side heat exchanger (305). The compressor (301), the refrigerant supply pipe (302), the refrigerant return pipe (303), the condenser (304), and the refrigeration-side heat exchanger (305) constitute a refrigerant circulation loop. The coolant inlet (101), the coolant outlet (102), the refrigeration-side heat exchanger (305), and the cooling tank (1) constitute a second cooling loop. The refrigerant in the refrigerant circulation loop exchanges heat with the refrigerant in the second cooling loop in the refrigeration-side heat exchanger (305).

4. The immersion liquid cooling system according to claim 2, characterized in that, A first pipeline (4) is provided between the coolant outlet (102) and the dry-cooled side heat exchanger (204), and a second pipeline (5) is provided between the coolant inlet (101) and the dry-cooled side heat exchanger (204). A first valve (6) is provided on the first pipeline (4), and a second valve (7) is provided on the second pipeline (5). A third pipe (8) is provided between the coolant outlet (102) and the refrigeration-side heat exchanger (305), and a fourth pipe (9) is provided between the coolant inlet (101) and the refrigeration-side heat exchanger (305). A third valve (10) is provided on the third pipe (8), and a connecting pipe (11) is provided between the third pipe (8) and the second pipe (5). The first end of the connecting pipe (11) is located between the dry-cooling-side heat exchanger (204) and the second valve (7), and the second end of the connecting pipe (11) is located between the refrigeration-side heat exchanger (305) and the third valve (10). A fourth valve (12) is provided on the connecting pipe (11).

5. The immersion liquid cooling system according to claim 4, characterized in that, The first pipeline (4) is equipped with a first circulation pump (13).

6. The immersion liquid cooling system according to claim 5, characterized in that, The first circulating pump (13) consists of at least two pumps connected in parallel on the first pipeline (4).

7. The immersion liquid cooling system according to claim 2, characterized in that, A second circulation pump (14) is provided on the dry coolant circulation loop.

8. The immersion liquid cooling system according to claim 3, characterized in that, An expansion valve (15) is provided on the refrigerant supply pipe (302).

9. The immersion liquid cooling system according to claim 1, characterized in that, The dry cooler (201) includes a housing (2011) and a fan (2012). The housing (2011) is used to contain dry coolant, and the fan (2012) is located in the housing (2011) and is used to cool the dry coolant in the housing (2011).

10. An immersion liquid cooling method, wherein the method is applied to the immersion liquid cooling system according to any one of claims 1-9, characterized in that, include: When the temperature of the coolant in the cooling tank (1) is less than the first preset value, the dry cooling module (2) exchanges heat with the coolant flowing out of the coolant outlet (102) alone; When the temperature of the coolant in the cooling tank (1) is greater than the first preset value and less than the second preset value, the dry cooling module (2) and the mechanical refrigeration module (3) exchange heat with the coolant flowing out of the coolant outlet (102); When the temperature of the coolant in the cooling tank (1) is greater than the second preset value, the mechanical refrigeration module (3) exchanges heat with the coolant flowing out of the coolant outlet (102) separately.

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