A multi-stage temperature controlled liquid cooling system

Abstract

The present invention proposes a multi-stage temperature-controlled liquid cooling system, which relates to the field of data center cooling technology. The multi-stage temperature-controlled liquid cooling system includes a modular cooling liquid cooling pool, a liquid inlet main pipeline, a liquid return main pipeline and multiple liquid cooling sub-cabins, wherein the multiple liquid cooling sub-cabins are respectively deployed in the modular cooling liquid cooling pool, each liquid cooling sub-cabin is respectively connected to the liquid inlet main pipeline through a liquid inlet branch pipe, each liquid cooling sub-cabin is respectively connected to the liquid return main pipeline through a liquid return branch pipe, and a first sub-pipeline and a second sub-pipeline are further connected between two adjacent liquid cooling sub-cabins, and an electromagnetic valve pump is respectively arranged on each liquid inlet branch pipe, each liquid return branch pipe, each first sub-pipeline and each second sub-pipeline, and a temperature control sensor is respectively arranged on each liquid return branch pipe. When the temperatures of two adjacent liquid cooling sub-cabins are different, the coolant flows from the liquid cooling sub-cabin with a higher temperature into the liquid cooling sub-cabin with a lower temperature through the first sub-pipeline or the second sub-pipeline. The multi-stage temperature-controlled liquid cooling system proposed by the present invention can effectively improve the refrigeration efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of data center cooling, and in particular to a multi-stage temperature-controlled liquid cooling system. Background Art

[0002] With the accelerated development of industries such as artificial intelligence, cloud computing, and big data, the demand, scale, and construction of data centers have exploded. A large amount of heat is generated during the operation of data centers. In order to maintain the normal operation of equipment, data centers need to be effectively cooled. Existing data center cooling technologies mainly include air cooling and liquid cooling.

[0003] Air cooling technology is the most common cooling method in data centers and is mostly used in conventional server production. It has lower application and maintenance costs, unified standards, and more mature technology. However, current air cooling cannot cope with servers with higher computing power (such as servers serving 5G, AI, supercomputing, etc.). The power consumption limit of a single cabinet in air cooling mode is only 30kW; and when the power consumption of a single cabinet is around 20kW, the cost of air cooling will rise rapidly and the power consumption will increase sharply.

[0004] Liquid cooling technology is a cooling method that is being gradually promoted and applied. Liquid cooling technology is a more accurate cooling method that exchanges heat directly with the heat-generating components (CPU, GPU, etc.) of information and communication equipment to reduce path cooling losses. The relatively high supply and return liquid temperature design of the liquid cooling system can make full use of natural cold sources for heat dissipation, achieve efficient and green cooling, and is gradually being applied and promoted in the field of data centers. Liquid cooling also has certain limitations. Whether it is cold plate liquid cooling, immersion liquid cooling or spray liquid cooling, all three liquid cooling methods have put forward higher requirements for the core component servers of data centers. However, the implementation standards of existing core component liquid cooling servers are not unified, resulting in the inability to unify the interface form and cooling medium. With the sharp increase in chip heat generation, the internal structure of the server and related sub-components need to be customized and designed and produced to adapt to the liquid cooling method. At the same time, the cooling medium takes into account the requirements of insulation, non-toxicity and non-corrosiveness, resulting in a geometric increase in its production, application and maintenance costs. In addition, the shelf rate of liquid-cooled servers in data center racks has not been maximized, resulting in PUE (power usage effectiveness) and other measurement values ​​not meeting expectations.

[0005] In view of this, the inventor has designed a multi-stage temperature-controlled liquid cooling system based on many years of production design experience in this field and related fields and after repeated experiments, in order to solve the problems existing in the prior art. Summary of the invention

[0006] The object of the present invention is to provide a multi-stage temperature-controlled liquid cooling system, which can effectively improve the refrigeration efficiency.

[0007] To achieve the above-mentioned purpose, the present invention proposes a multi-stage temperature-controlled liquid cooling system, wherein the multi-stage temperature-controlled liquid cooling system comprises a modular cooling liquid cooling pool, a liquid inlet main pipeline, a liquid return main pipeline and a plurality of liquid cooling sub-cabins, wherein the plurality of liquid cooling sub-cabins are respectively deployed in the modular cooling liquid cooling pool, each of the liquid cooling sub-cabins is respectively connected to the liquid inlet main pipeline through a liquid inlet branch pipe, each of the liquid cooling sub-cabins is respectively connected to the liquid return main pipeline through a liquid return branch pipe, and a first sub-pipeline and a second sub-pipeline are further connected between two adjacent liquid cooling sub-cabins, and an electromagnetic valve pump is respectively arranged on each of the liquid inlet branches, each of the liquid return branches, each of the first sub-pipeline and each of the second sub-pipeline, and a temperature control sensor is respectively arranged on each of the liquid return branches. When the temperatures of the two adjacent liquid cooling sub-cabins are different, the coolant flows from the liquid cooling sub-cabin with a higher temperature into the liquid cooling sub-cabin with a lower temperature through the first sub-pipeline or the second sub-pipeline.

[0008] Compared with the prior art, the present invention has the following characteristics and advantages:

[0009] The multi-stage temperature-controlled liquid cooling system proposed in the present invention is characterized in that a plurality of liquid cooling sub-cabins in a modular cooling liquid pool are interconnected through a first sub-pipeline and a second sub-pipeline. When the temperatures of the liquid cooling sub-cabins are different, the cooling medium can flow from the low-temperature liquid cooling sub-cabin to the high-temperature liquid cooling sub-cabin, thereby quickly reducing the temperature of the high-temperature liquid cooling sub-cabin, thereby achieving precise and efficient cooling of the high-temperature liquid cooling sub-cabin; at the same time, it also improves the utilization rate and circulation rate of the cooling medium, optimizes the cooling performance of the entire system, and improves the economic performance of the liquid cooling system.

[0010] The multi-stage temperature-controlled liquid cooling system proposed in the present invention is interconnected between two adjacent liquid cooling sub-cabins, and a temperature control sensor is provided on the liquid return branch pipe of each liquid cooling sub-cabin. By precisely controlling the temperature of each liquid cooling sub-cabin, the cooling strategy can be automatically adjusted according to different loads or environmental conditions to adapt to various complex application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0012] Figure 1 This is a working schematic diagram of the first-stage cooling mode of the multi-stage temperature-controlled liquid cooling system proposed by the present invention;

[0013] Figure 2It is a schematic diagram of a modular cooling liquid pool filled with cooling water in the present invention;

[0014] Figure 3 It is a schematic diagram of the installation of the spray device in the present invention.

[0015] Description of Reference Numerals

[0016] 100. Multi-stage temperature-controlled liquid cooling system;

[0017] 10. Modular Coolant Pool

[0018] 20. Liquid inlet main pipeline;

[0019] 30. Liquid return main pipeline;

[0020] 40. Liquid-cooled sub-cabin;

[0021] 41. Liquid inlet branch pipe;

[0022] 42. Liquid return branch pipe;

[0023] 43. The first sub-pipeline;

[0024] 44. Second sub-pipeline;

[0025] 45. Solenoid valve pump;

[0026] 51. High temperature liquid reservoir;

[0027] 52. Heat exchange unit;

[0028] 521. Heat exchanger;

[0029] 53. Low temperature storage tank;

[0030] 54. Traffic distribution unit;

[0031] 541, flow distributor;

[0032] 60. Heat exchange cold source;

[0033] 61. Cold source output pipe;

[0034] 62. Cold source return pipe;

[0035] 63. Chilled water inlet pipeline;

[0036] 64. High-temperature water outlet pipe;

[0037] 70. Spraying device;

[0038] 71. Transverse movement mechanism;

[0039] 72. Liquid cooling nozzle;

[0040] 73. Connect the pipeline. DETAILED DESCRIPTION

[0041] The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should all be considered to belong to the scope of the present invention.

[0042] like Figure 1 As shown, the present invention proposes a multi-stage temperature-controlled liquid cooling system 100, which includes a modular cooling liquid pool 10, a liquid inlet main pipeline 20, a liquid return main pipeline 30 and a plurality of liquid cooling sub-cabins 40, wherein the plurality of liquid cooling sub-cabins 40 are respectively deployed in the modular cooling liquid pool 10, each liquid cooling sub-cabin 40 is respectively connected to the liquid inlet main pipeline 20 through a liquid inlet branch pipe 41, each liquid cooling sub-cabin 40 is respectively connected to the liquid return main pipeline 30 through a liquid return branch pipe 42, and two adjacent A first sub-pipe 43 and a second sub-pipe 44 are also connected between the liquid-cooling sub-cabins 40, and an electromagnetic valve pump 45 is respectively provided on each liquid inlet branch pipe 41, each liquid return branch pipe 42, each first sub-pipe 43 and each second sub-pipe 44, and a temperature control sensor is respectively provided on each liquid return branch pipe 42. When the temperatures of two adjacent liquid-cooling sub-cabins 40 are different, the coolant flows from the liquid-cooling sub-cabin with a higher temperature to the liquid-cooling sub-cabin with a lower temperature through the first sub-pipe 43 or the second sub-pipe 44.

[0043] The multi-stage temperature-controlled liquid cooling system 100 proposed in the present invention is interconnected between multiple liquid-cooled sub-cabins 40 located in the modular cooling liquid pool 10 through the first sub-pipe 43 and the second sub-pipe 44. When the temperatures of the liquid-cooled sub-cabins 40 are different, the cooling medium can flow from the low-temperature liquid-cooled sub-cabin 40 to the high-temperature liquid-cooled sub-cabin 40, thereby quickly reducing the temperature of the high-temperature liquid-cooled sub-cabin 40, thereby achieving precise and efficient cooling of the high-temperature liquid-cooled sub-cabin; at the same time, it also improves the utilization rate and circulation rate of the cooling medium, optimizes the cooling performance of the entire system, and improves the economic performance of the multi-stage temperature-controlled liquid cooling system 100.

[0044] The multi-stage temperature-controlled liquid cooling system 100 proposed in the present invention utilizes a temperature control sensor arranged on the liquid return branch pipe 42 to monitor the temperature of the cooling medium in the liquid cooling sub-cabin 40 in real time, and timely and accurately identify the high-temperature liquid cooling sub-cabin 40, thereby being able to centrally and efficiently cool the high-temperature liquid cooling sub-cabin 40 to ensure the cooling effect.

[0045] The multi-stage temperature-controlled liquid cooling system 100 proposed in the present invention is interconnected between two adjacent liquid cooling sub-cabins 40, and a temperature control sensor is provided on the liquid return branch pipe 42 of each liquid cooling sub-cabin 40. By precisely controlling the temperature of each liquid cooling sub-cabin 40, the cooling strategy can be automatically adjusted according to different loads or environmental conditions to adapt to various complex application scenarios.

[0046] In an optional embodiment of the present invention, the space size of each liquid-cooling sub-cabin 40 can be customized and adjusted according to equipment requirements or environmental requirements, etc., to adapt to servers of different sizes.

[0047] In an optional embodiment of the present invention, each solenoid valve pump 45 is a one-way solenoid valve pump, which controls the one-way flow of the refrigerant medium in the liquid inlet branch pipe 41 and the liquid return branch pipe 42 to achieve refrigeration and heat dissipation of each liquid cooling sub-cabin 40.

[0048] Furthermore, the temperature control sensor may also be integrated into the solenoid valve pump 45 to form a one-way temperature control solenoid valve pump.

[0049] In an optional example of this embodiment, the solenoid valve pump 45 on the first sub-pipe 43 and the second sub-pipe 44 between two adjacent liquid-cooled sub-cabins 40 has opposite flow directions to ensure that the cooling medium between the two liquid-cooled sub-cabins 40 can circulate.

[0050] In an optional embodiment of the present invention, the multi-stage temperature-controlled liquid cooling system 100 further includes a high-temperature liquid storage tank 51, a heat exchange unit 52 and a low-temperature liquid storage tank 53 connected in sequence, the high-temperature liquid storage tank 51 is connected to the return liquid main pipeline 30, and the low-temperature liquid storage tank 53 is connected to the inlet liquid main pipeline 20 through the flow distribution unit 54. With the above structure, the cooling medium (temperature has increased) refluxed through the return liquid main pipeline 30 enters the heat exchange unit 52 for heat exchange treatment, and the cooling medium (temperature has decreased) cooled by the heat exchange unit 52 enters the inlet liquid main pipeline 20 again to cool each liquid cooling sub-cabin 40. The cooling medium entering the liquid cooling sub-cabin 40 directly contacts the server and takes away the heat emitted by the server when it is working, thereby realizing the recycling of the cooling medium, environmental protection and energy saving. The high-temperature liquid storage tank 51 is used to temporarily store the high-temperature cooling medium refluxed from the return liquid main pipeline 30, and the low-temperature liquid storage tank 53 is used to temporarily store the cooling medium after cooling by the heat exchange unit 52.

[0051] In an optional example of this embodiment, the heat exchange unit 52 has at least two heat exchangers 521 arranged in parallel. The two heat exchangers 521 arranged in parallel realize backup heat exchange, thereby ensuring the reliability of the operation of the heat exchange unit 52.

[0052] In an optional example of this embodiment, the flow distribution unit 54 has at least two flow distributors 541 arranged in parallel. The flow distribution unit 54 delivers the low-temperature cooling medium into the liquid inlet main pipeline 20 according to the refrigeration requirements of each liquid cooling sub-cabin 40. The backup flow distribution is achieved by the two flow distributors 541, which ensures the reliability of the flow distribution unit 54.

[0053] In an optional example of this embodiment, the modular cooling pool multi-stage temperature control liquid cooling system 100 further includes a heat exchange cold source 60, and a cold source output pipe 61 and a cold source return pipe 62 are connected between the heat exchange cold source 60 and the heat exchange unit 52. The heat exchange cold source 60 is used to provide a cold source medium for the heat exchange unit 52 to cool the cooling medium entering the heat exchange unit 52.

[0054] In an optional example, the cold source medium provided by the heat exchange cold source 60 is cooling water. After the cooling water enters the heat exchange unit 52, it exchanges heat with the cooling medium, and finally brings the heat in the liquid cooling medium back to the heat exchange cold source 60 for cyclic reciprocating heat exchange.

[0055] Preferably, the heat exchange cold source 60 is arranged outdoors of the data center, and the heat exchange unit 52 is arranged indoors of the data center.

[0056] Furthermore, the heat exchange cold source 60 can cool the cooling water by various cooling methods such as a chiller, natural air cooling, evaporative cooling, and fluorine pump cooling.

[0057] In an alternative example, Figure 2 As shown, a chilled water inlet pipe 63 and a high-temperature water outlet pipe 64 are also provided between the heat exchange cold source 60 and the modular cooling liquid pool 10. In certain cases, the cooling water of the heat exchange cold source 60 is directly injected into the modular cooling liquid pool 10 through the chilled water inlet pipe 63, and then flows back to the heat exchange cold source 60 through the high-temperature water outlet pipe 64 for heat exchange cooling treatment, so that each liquid cooling sub-cabin 40 in the modular cooling liquid pool 10 is always in a low temperature state. Each liquid cooling sub-cabin 40 adopts a sealed structure to prevent cooling water from entering the liquid cooling sub-cabin 40, thereby ensuring the normal operation of the server.

[0058] In an optional embodiment of the present invention, the modular cooling pool multi-stage temperature control liquid cooling system 100 further includes a spray device 70, such as Figure 3As shown, the spray device 70 includes a transverse movement mechanism 71, a liquid cooling nozzle 72 and a connecting pipeline 73. The transverse movement mechanism 71 drives the liquid cooling nozzle 72 to move above the multiple liquid cooling sub-cabins 40, and the liquid cooling nozzle 72 is connected to the low-temperature liquid storage tank 53 through the connecting pipeline 73. With the above structure, the liquid cooling nozzle 72 is driven by the transverse movement mechanism 71 to move above the multiple liquid cooling sub-cabins 40. When the temperature of the server in some liquid cooling sub-cabins 40 increases, the transverse movement mechanism 71 drives the liquid cooling nozzle 72 to move above the corresponding liquid cooling sub-cabin 40 to perform precise positioning auxiliary cooling and heat dissipation on the server.

[0059] In an optional example, the connecting pipeline 73 is a telescopic hose to facilitate the movement of the liquid cooling nozzle 72, and the transverse movement mechanism 71 can adopt the existing technology, which will not be described in detail here.

[0060] In an optional embodiment of the present invention, an auxiliary cooling device is further provided outside each liquid-cooled sub-cabin 40 , and the auxiliary cooling device is used to cool the corresponding liquid-cooled sub-cabin 40 .

[0061] In an optional example of this embodiment, the auxiliary cooling device includes auxiliary cooling pipelines uniformly distributed on the periphery of the liquid-cooled sub-cabin 40. In an optional example, the auxiliary cooling pipeline can be connected to the liquid inlet main pipeline 20 to cool the liquid-cooled sub-cabin 40 using a cooling medium; in another optional example, the auxiliary cooling pipeline is connected to a heat exchange cold source to cool the liquid-cooled sub-cabin 40 using a cold source medium.

[0062] In an optional example, a one-way solenoid valve pump is provided between the auxiliary cooling pipeline and the liquid inlet main pipeline 20 (or between the auxiliary cooling pipeline and the heat exchange cold source) to control the cooling effect of the auxiliary cooling device.

[0063] In an optional embodiment of the present invention, the multi-stage temperature-controlled liquid cooling system 100 further includes a control unit, which is electrically connected to each solenoid valve pump 45 and each temperature control sensor. The control unit receives the temperature data of the cooling medium in the liquid-cooled sub-cabin 40 monitored by each temperature control sensor, and adjusts the opening and closing and flow rate of each solenoid valve pump 45 according to the temperature data to adjust the flow rate of the cooling medium in each liquid-cooled sub-cabin 40.

[0064] In an optional example of this embodiment, the control unit is also electrically connected to the transverse movement mechanism 71 to accurately control the position of the liquid cooling nozzle 72 to cool the high-temperature liquid cooling sub-chamber 40.

[0065] Please refer to Figures 1 to 3 , the specific implementation process of the multi-stage temperature-controlled liquid cooling system 100 proposed by the present invention is now described in detail in conjunction with an embodiment.

[0066] The multi-stage temperature-controlled liquid cooling system 100 proposed by the present invention is composed of multiple liquid cooling sub-cabins 40 deployed in a modular cooling liquid pool 10, wherein the space size of each liquid cooling sub-cabin 40 can be customized and adjusted according to equipment requirements or environmental requirements, etc., to adapt to servers of different sizes. Through the liquid inlet branch pipe 41 and the liquid return branch pipe 42 and the first sub-pipeline 43 and the second sub-pipeline 44 between the multiple liquid cooling sub-cabins 40, the system refrigeration and heat dissipation are realized under the control of each solenoid valve pump 45. The entire multi-stage temperature-controlled liquid cooling system 100 is composed of an outdoor heat exchange cold source 60 on the outdoor primary side. The outdoor heat exchange cold source 60 can introduce cold water into the indoor double backup heat exchange unit 52 through various cooling methods such as chillers, natural air cooling, evaporative cooling and fluorine pump cooling to realize heat exchange with the indoor liquid cooling medium, and finally bring the heat in the liquid cooling medium back to the outdoor heat exchange cold source 60 for cyclic reciprocating heat exchange. The indoor secondary side double backup heat exchange unit 52 uses double heat exchangers to realize backup heat exchange. The double backup heat exchange unit 52 converts the high temperature cooling medium in the high temperature liquid storage tank 51 into low temperature cooling medium after heat exchange treatment and then enters the low temperature liquid storage tank 53. Then, the low temperature cooling medium is transported into the liquid inlet main pipeline 20 according to the cooling demand of each liquid cooling sub-cabin 40 through the double backup flow distribution unit 54, and then transported into each liquid cooling sub-cabin 40 through the liquid inlet main pipeline 20 and the one-way electromagnetic valve pump 45. The heat emitted by the liquid cooling server during operation is taken away by the direct contact between the cooling medium and the liquid cooling server, and then the high temperature cooling medium is input into the high temperature liquid storage tank 51 through the one-way electromagnetic valve pump 45 and the return liquid main pipeline 30, thereby completing the circulation refrigeration of the whole system. In certain cases, the cooling water supporting the outdoor heat exchange cold source 60 is directly injected into the modular cooling liquid pool 10 through the chilled water inlet pipeline 63, and then flows back to the outdoor heat exchange cold source 60 through the high temperature water outlet pipeline 64 for heat exchange cooling treatment.

[0067] The multi-stage temperature-controlled liquid cooling system 100 proposed by the present invention has five levels of cooling modes. Specifically:

[0068] In the first-stage cooling mode, the server temperature in the liquid-cooled sub-cabin 40 is T (T is based on the monitored temperature on the return liquid branch pipe 42 of each liquid-cooled sub-cabin 40), and the entire multi-stage temperature-controlled liquid cooling system 100 cooperates with each other. At this time, only the liquid inlet branch pipe 41 and the return liquid branch pipe 42 are working (the first sub-pipeline 43 and the second sub-pipeline 44 between each liquid-cooled sub-cabin 40 are closed), and the flow distribution unit 54 controls the cooling medium to flow to each liquid-cooled sub-cabin 40 for uniform liquid cooling. At this time, the solenoid valve pumps 45 on the liquid inlet branch pipe 41 and the return liquid branch pipe 42 are uniformly turned on (at this time, the solenoid valve pump 45 only controls the opening and closing of its valve body while the internal pump body is dormant) to ensure the stability of the coolant flow and flow rate in and out of the liquid-cooled sub-cabin 40.

[0069] In the secondary cooling mode, the server temperature in some liquid-cooled sub-compartments 40 is T+a (T+a is based on the monitored temperature on the return liquid branch pipe 42 of each liquid-cooled sub-compartment 40), and the solenoid valve pump 45 on the liquid inlet branch pipe 41 and the return liquid branch pipe 42 of the corresponding liquid-cooled sub-compartment 40 is adjusted to increase the opening of the liquid inlet flow channel and the liquid outlet flow channel. If necessary, the pump body inside the solenoid valve pump 45 is started to speed up the circulation speed of the coolant in the liquid-cooled sub-compartment 40.

[0070] In the third-level cooling mode, the server temperature in some liquid-cooled sub-compartments 40 is T+b (T+b is based on the monitored temperature on the liquid return branch pipe 42 of each liquid-cooled sub-compartment 40), and is much higher than the server temperature T in some adjacent liquid-cooled sub-compartments 40. When a certain temperature difference is reached, the solenoid valve pump 45 between the adjacent liquid-cooled sub-compartments 40 with a large temperature difference is opened, so that the cooling medium in the liquid-cooled sub-compartments 40 of some servers that are not working or have low heat generation flows into the adjacent liquid-cooled sub-compartments 40 with higher temperature.

[0071] In the four-stage cooling mode, an auxiliary cooling device is arranged on the periphery of each liquid-cooled sub-cabin 40, and the auxiliary cooling pipes of the auxiliary cooling device are evenly distributed on the periphery of the liquid-cooled sub-cabin 40. When the temperature of the servers in some liquid-cooled sub-cabins 40 is T+c (T+c is based on the monitored temperature on the return liquid branch pipe 42 of each liquid-cooled sub-cabin 40), the auxiliary cooling pipe starts to work and cools the entire liquid-cooled sub-cabin 40 in a physical indirect manner. The auxiliary cooling pipe can be directly connected to the liquid inlet main pipeline 20 for liquid supply (at this time, the cooling liquid after heat exchange directly enters the return liquid main pipeline 30), or it can be directly connected to the primary cooling water on the outdoor side (at this time, the cooling water after heat exchange directly enters the outdoor heat exchange cold source 60).

[0072] In the five-stage cooling mode, an X-axis bracket and a Y-axis bracket are arranged above the modular cooling liquid pool 10 to form a transverse movement mechanism 71. The transverse movement mechanism 71 is equipped with a liquid cooling nozzle 72. The liquid cooling nozzle 72 is connected to the low-temperature liquid storage tank 53 or other liquid supply devices through a telescopic hose (connecting pipeline 73). When the temperature of the server in some liquid cooling sub-cabins 40 is T+d (T+d is based on the monitored temperature on the return liquid branch pipe 42 of each liquid cooling sub-cabin 40), the transverse movement mechanism 71 drives the liquid cooling nozzle 72 to move to the top of the liquid cooling sub-cabin 40 to accurately locate the server for auxiliary cooling and heat dissipation.

[0073] A multi-stage temperature-controlled liquid cooling system 100 proposed by the present invention is applied to a data center to provide heat dissipation for the server equipment in the data center. Through a multi-stage cooling mode, the interconnection between the liquid cooling sub-cabins 40 in the modular cooling liquid pool 10 is realized, the high-temperature liquid cooling sub-cabins 40 are accurately identified through temperature control sensors, and the low-temperature cooling medium is quickly concentrated through a control unit to accurately and efficiently cool the high-temperature liquid cooling sub-cabins 40, and finally, the efficient cooling and heat dissipation of each liquid cooling sub-cabin 40 in the entire modular cooling liquid pool 10 is realized through a parent-child system. At the same time, the entire modular cooling liquid pool 10 can accommodate customized liquid cooling sub-cabins 40 according to different equipment specifications, thereby improving system compatibility.

[0074] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.

Claims

1. A multi-stage temperature-controlled liquid cooling system, characterized in that: The multi-stage temperature-controlled liquid cooling system comprises a modular cooling liquid cooling pool, a liquid inlet main pipeline, a liquid return main pipeline and a plurality of liquid cooling sub-cabins, wherein the plurality of liquid cooling sub-cabins are respectively arranged in the modular cooling liquid cooling pool, each of the liquid cooling sub-cabins is respectively connected to the liquid inlet main pipeline through a liquid inlet branch pipe, each of the liquid cooling sub-cabins is respectively connected to the liquid return main pipeline through a liquid return branch pipe, and a first sub-pipeline and a second sub-pipeline are further connected between two adjacent liquid cooling sub-cabins, and an electromagnetic valve pump is respectively arranged on each of the liquid inlet branch pipes, each of the liquid return branch pipes, each of the first sub-pipeline and each of the second sub-pipeline, and a temperature control sensor is respectively arranged on each of the liquid return branch pipes, and when the temperatures of the two adjacent liquid cooling sub-cabins are different, the coolant flows from the liquid cooling sub-cabin with a higher temperature into the liquid cooling sub-cabin with a lower temperature through the first sub-pipeline or the second sub-pipeline; The solenoid valve pumps on the first sub-pipeline and the second sub-pipeline between two adjacent liquid-cooled sub-cabins have opposite flow directions to ensure that the cooling medium between the two liquid-cooled sub-cabins can circulate.

2. The multi-stage temperature-controlled liquid cooling system according to claim 1, characterized in that: The solenoid valve pump is a one-way solenoid valve pump.

3. The multi-stage temperature-controlled liquid cooling system according to claim 1, characterized in that: The multi-stage temperature-controlled liquid cooling system also includes a high-temperature liquid storage tank, a heat exchange unit and a low-temperature liquid storage tank connected in sequence, the high-temperature liquid storage tank is connected to the return liquid main pipeline, and the low-temperature liquid storage tank is connected to the inlet liquid main pipeline through a flow distribution unit.

4. The multi-stage temperature-controlled liquid cooling system according to claim 3, characterized in that: The heat exchange unit has at least two heat exchangers arranged in parallel.

5. The multi-stage temperature-controlled liquid cooling system according to claim 3, characterized in that: The flow distribution unit has at least two flow distributors arranged in parallel.

6. The multi-stage temperature-controlled liquid cooling system according to claim 3, characterized in that: The multi-stage temperature-controlled liquid cooling system also includes a heat exchange cold source, and a cold source output pipe and a cold source return pipe are connected between the heat exchange cold source and the heat exchange unit.

7. The multi-stage temperature-controlled liquid cooling system according to claim 6, characterized in that: A chilled water inlet pipe and a high-temperature water outlet pipe are also connected between the heat exchange cold source and the modular coolant cold pool.

8. The multi-stage temperature-controlled liquid cooling system according to claim 3, characterized in that: The multi-stage temperature-controlled liquid cooling system also includes a spray device, which includes a transverse movement mechanism, a liquid cooling nozzle and a connecting pipeline. The transverse movement mechanism drives the liquid cooling nozzle to move above the multiple liquid cooling sub-cabins, and the liquid cooling nozzle is connected to the low-temperature liquid storage tank through the connecting pipeline.

9. The multi-stage temperature-controlled liquid cooling system according to claim 1, characterized in that: An auxiliary cooling device is also provided outside each of the liquid-cooled sub-cabins, and the auxiliary cooling device is used to cool the corresponding liquid-cooled sub-cabin.

10. The multi-stage temperature-controlled liquid cooling system according to any one of claims 1 to 9, characterized in that: The multi-stage temperature-controlled liquid cooling system further comprises a control unit, which is electrically connected to each of the solenoid valve pumps and each of the temperature control sensors.

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