A cooling liquid distribution unit and a liquid-cooled cabinet

Abstract

The utility model relates to a liquid cooling cabinet technical field, concretely relates to a cooling liquid distribution unit and liquid cooling cabinet. The utility model aims at solving the problem of insufficient cooling liquid flow regulating ability. Cooling liquid distribution unit includes primary side heat exchange module, heat exchanger and secondary side heat exchange module, and the direction from heat exchanger to the heat dissipation object of secondary side liquid return pipeline is connected with expansion tank, liquid supplement system and secondary side pump system in proper order, and secondary side first temperature sensing module, secondary side first pressure sensing module are equipped on secondary side liquid inlet pipeline, secondary side second pressure sensing module is equipped between expansion tank and liquid supplement system, secondary side third pressure sensing module and secondary side second temperature sensing module are equipped between secondary side pump system and secondary side liquid return port. Liquid cooling cabinet includes cabinet body, and the liquid inlet distribution unit, liquid return distribution unit, a plurality of heat dissipation objects with liquid cooling plate and cooling liquid distribution unit arranged in the cabinet body.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling cabinet technology, and more specifically, to a coolant distribution unit and a liquid cooling cabinet. Background Technology

[0002] In recent years, with the rapid development of technologies such as artificial intelligence, high-performance computing, and big data analytics, the computing density and power consumption of data centers have continued to rise, generating unprecedentedly high heat flux densities. Traditional air-cooling technology, due to its limited heat dissipation efficiency, high energy consumption, and high noise, has gradually reached its limits when handling such high-heat tasks. Against this backdrop, liquid cooling technology, with its higher thermal conductivity and energy efficiency, has become an important solution for data center heat dissipation. Among them, the coolant distribution unit (CDU) is the core of the liquid cooling system, mainly responsible for the circulation, distribution, and temperature regulation of the coolant.

[0003] As the computing load increases, load fluctuations also become more severe. Therefore, the coolant distribution unit is required to have good flow regulation capabilities. Utility Model Content

[0004] The present invention aims to overcome at least one of the defects of the prior art and provides a coolant distribution unit and a liquid cooling cabinet, which aims to solve the problem of insufficient coolant flow regulation capability.

[0005] The technical solution adopted by this utility model is to provide a coolant distribution unit, including a primary heat exchange module, a heat exchanger, and a secondary heat exchange module. The primary heat exchange module is used to connect with a liquid cooling system and circulate a first heat exchange medium together. The secondary heat exchange module is used to connect with a heat dissipation object and circulate a second heat exchange medium together. Both the primary heat exchange module and the secondary heat exchange module are connected to the heat exchanger so that the first heat exchange medium and the second heat exchange medium exchange heat through the heat exchanger. The secondary side heat exchange module includes a secondary side liquid inlet pipe and a secondary side liquid return pipe. The secondary side liquid inlet pipe is provided with a secondary side liquid inlet, and the secondary side liquid return pipe is provided with a secondary side liquid return outlet. The second heat exchange medium flows from the heat dissipation object to the heat exchanger through the secondary side liquid inlet pipe, and then flows back from the heat exchanger to the heat dissipation object through the secondary side liquid inlet pipe. The secondary side liquid return pipe is connected in sequence to an expansion tank, a liquid replenishment system, and a secondary side pump system in the direction from the heat exchanger to the heat dissipation object. Specifically, a secondary side first temperature sensing module and a secondary side first pressure sensing module are provided on the secondary side inlet pipe near the secondary side inlet. A secondary side second pressure sensing module is provided on the secondary side return pipe between the expansion tank and the replenishment system. A secondary side third pressure sensing module and a secondary side second temperature sensing module are provided on the secondary side return pipe between the secondary side pump system and the secondary side return port.

[0006] In this design, multiple pressure sensors installed on the secondary-side return pipeline monitor system pressure in real time. Combined with temperature sensor data, this provides multi-point pressure and temperature monitoring data for precise control of the pump speed and the replenishment system. Furthermore, the expansion tank and replenishment system maintain stable pressure in the secondary-side heat exchange module, ensuring the secondary-side pump system operates under optimal pressure conditions. This prevents flow instability or attenuation caused by pressure fluctuations or system air intake, thereby enhancing the continuous and reliable flow regulation capability of the coolant distribution unit. Therefore, this design's coolant distribution unit can proactively adjust the secondary-side coolant flow rate through the secondary-side pump system based on multi-point pressure and temperature monitoring, addressing the issue of insufficient flow regulation capability. Simultaneously, the expansion tank and replenishment system work together to provide alarms for flow stability, ensuring the accuracy of flow regulation.

[0007] In some embodiments, the replenishment system includes a replenishment tank, a replenishment pipeline, and a replenishment pump. The replenishment tank is connected to the secondary return pipeline via the replenishment pipeline. The replenishment pump is located on the replenishment pipeline, wherein a first check valve module is provided on the replenishment pipeline connected to the pump outlet of the replenishment pump.

[0008] In some embodiments, the first check valve module includes a first auxiliary check valve and a first main check valve arranged before and after the replenishment pipeline.

[0009] In some embodiments, a secondary-side first switching valve is provided on the replenishment pipeline between the first check valve module and the secondary-side return pipeline.

[0010] In some embodiments, the replenishment system further includes an overflow line connected to the replenishment tank.

[0011] In some embodiments, the replenishment system further includes a replenishment line connected to the replenishment tank.

[0012] In some embodiments, the replenishment tank is equipped with a liquid level sensor.

[0013] In some embodiments, a drain line is also included, which is connected to the secondary side return line between the expansion tank and the secondary side pump system, and the drain line is provided with a secondary side second switch valve.

[0014] In some embodiments, the secondary side pump system includes a first circulation pump and a second circulation pump connected in parallel to the secondary side return line; The first circulating pump is connected to the secondary side return pipeline through the secondary side first auxiliary pipeline, and a second check valve module is provided on the secondary side first auxiliary pipeline connected to the pump outlet of the first circulating pump. The second circulation pump is connected to the secondary side return pipeline through the secondary side second auxiliary pipeline, and a third check valve module is provided on the secondary side second auxiliary pipeline connected to the pump outlet of the second circulation pump.

[0015] In some embodiments, the second check valve module includes a second auxiliary check valve and a second main check valve arranged before and after the first auxiliary pipeline on the secondary side.

[0016] In some embodiments, the third check valve module includes a third auxiliary check valve and a third main check valve arranged before and after the second auxiliary pipeline on the secondary side.

[0017] In some embodiments, a secondary third switching valve is provided on the secondary first auxiliary pipeline between the second check valve module and the secondary return pipeline.

[0018] In some embodiments, a secondary side fourth switching valve is provided on the secondary side second auxiliary pipeline between the third check valve module and the secondary side return pipeline.

[0019] In some embodiments, a secondary side fifth switching valve is provided on the secondary side first auxiliary pipeline connected to the pump inlet of the first circulating pump.

[0020] In some embodiments, a secondary side sixth switching valve is provided on the secondary side second auxiliary pipeline connected to the pump inlet of the second circulating pump.

[0021] In some embodiments, the secondary heat exchange module is further provided with a safety valve, which is connected to the secondary return pipeline between the secondary pump system and the secondary return port.

[0022] In some embodiments, the secondary-side first temperature sensing module includes a first temperature sensor and a second temperature sensor arranged before and after the secondary-side liquid inlet pipeline.

[0023] In some embodiments, the secondary-side first pressure sensing module includes a first pressure sensor and a second pressure sensor arranged before and after the secondary-side liquid inlet pipeline.

[0024] In some embodiments, the secondary-side second pressure sensing module includes a third pressure sensor and a fourth pressure sensor arranged before and after the secondary-side return line.

[0025] In some embodiments, the secondary-side third pressure sensing module includes a fifth pressure sensor and a sixth pressure sensor arranged before and after the secondary-side return line.

[0026] In some embodiments, the secondary-side second temperature sensing module includes a third temperature sensor and a fourth temperature sensor arranged before and after the secondary-side return liquid pipeline.

[0027] In some embodiments, the primary-side heat exchange module includes a primary-side liquid inlet pipe and a primary-side liquid return pipe. The primary-side liquid inlet pipe has a primary-side liquid inlet, and the primary-side liquid return pipe has a primary-side liquid return outlet. The first heat exchange medium flows from the liquid cooling system to the heat exchanger through the primary-side liquid inlet pipe, and then flows back from the heat exchanger to the liquid cooling system through the primary-side liquid inlet pipe. The primary-side liquid inlet pipe is connected to a primary-side first temperature sensing module and a primary-side first pressure sensing module, and the primary-side liquid return pipe is connected to a primary-side second temperature sensing module and a primary-side second pressure sensing module.

[0028] In some embodiments, the heat exchanger is a plate heat exchanger.

[0029] This utility model also provides a liquid-cooled cabinet, including a cabinet body, a liquid inlet distribution unit, a liquid return distribution unit, a plurality of heat dissipation objects equipped with liquid cooling plates, and the coolant distribution unit, wherein the liquid inlet distribution unit, the liquid return distribution unit, the heat dissipation objects, and the coolant distribution unit are all disposed in the cabinet body. The liquid inlet distribution unit includes a main liquid inlet and multiple branch liquid inlets connected to the main liquid inlet. The liquid return distribution unit includes a main liquid return port and multiple branch liquid return ports connected to the main liquid return port. Each liquid cooling plate is provided with a cold plate liquid inlet and a cold plate liquid return port. The main liquid inlet is connected to the secondary side liquid return port. Each branch liquid inlet is connected to the cold plate liquid inlet. The main liquid return port is connected to the secondary side liquid inlet. Each branch liquid return port is connected to the cold plate liquid return port.

[0030] In some embodiments, the liquid cooling cabinet further includes a housing disposed within the cabinet, the coolant distribution unit is installed inside the housing, and the primary side inlet, the primary side return outlet, the secondary side inlet, and the secondary side return outlet are all exposed on the surface of the housing.

[0031] In some embodiments, the coolant distribution unit is located at the bottom of the cabinet, and the heat dissipation objects are arranged layer by layer above the coolant distribution unit.

[0032] In some implementations, the object to be cooled is a server.

[0033] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting multiple pressure sensors and multiple temperature sensors on the circulation pipeline of the secondary heat exchange module, pressure and temperature monitoring data at multiple points are provided, enabling precise control of pump speed and liquid replenishment system. The pressure of the secondary heat exchange module is kept stable through the expansion tank and liquid replenishment system, enhancing the continuous and reliable flow regulation capability of the coolant distribution unit, thereby solving the problem of insufficient flow regulation capability and ensuring the accuracy of flow regulation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0035] Figure 2 This is a schematic diagram of the structure of Example 2.

[0036] Figure 3 This is a partial structural diagram of Example 2.

[0037] Reference numerals: Coolant distribution unit 100, primary side heat exchange module 200, primary side inlet pipe 210, primary side inlet port 211, primary side return pipe 220, primary side return port 221, primary side first temperature sensor module 230, primary side first pressure sensor module 240, primary side second temperature sensor module 250, primary side second pressure sensor module 260, primary side switch valve 270, secondary side heat exchange module 300, secondary side inlet pipe 310, secondary side inlet port 311, first temperature sensor 312, second temperature sensor 313, first pressure sensor 314, second pressure sensor 315, secondary side return pipe 320, secondary side return port 321, third temperature sensor 322, fourth temperature sensor 323, fifth pressure sensor 324, sixth pressure sensor 325, expansion tank 330, third pressure sensor 331, and so on. Four pressure sensors 332, replenishment tank 340, replenishment pipeline 341, replenishment pump 342, first check valve module 343, secondary side first switch valve 344, overflow pipeline 345, replenishment pipeline 346, level sensor 347, first circulation pump 350, secondary side first auxiliary pipeline 351, second check valve module 352, secondary side third switch valve 353, first drain pipeline 354, secondary side second switch valve 355, secondary side fifth... Switch valve 356, second circulation pump 360, secondary side second auxiliary pipeline 361, third check module 362, secondary side fourth switch valve 363, second drain pipeline 364, secondary side sixth switch valve 365, safety valve 370, heat exchanger 400, cabinet 500, liquid inlet distribution unit 600, liquid return distribution unit 700, server 800, liquid cooling plate 810, first interface 820, second interface 830, liquid cooling system 900. Detailed Implementation

[0038] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0039] Furthermore, in this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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 utility model according to the specific circumstances.

[0040] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0041] Example 1 like Figure 1 As shown, this embodiment provides a coolant distribution unit 100, including a primary heat exchange module 200, a heat exchanger 400, and a secondary heat exchange module 300. The primary heat exchange module 200 is used to connect to the liquid cooling system 900 and jointly circulate a first heat exchange medium. The secondary heat exchange module 300 is used to connect to the heat dissipation object and jointly circulate a second heat exchange medium. Both the primary heat exchange module 200 and the secondary heat exchange module 300 are connected to the heat exchanger 400 so that the first heat exchange medium and the second heat exchange medium exchange heat through the heat exchanger 400. The secondary side heat exchange module 300 includes a secondary side liquid inlet pipe 310 and a secondary side liquid return pipe 320. The secondary side liquid inlet pipe 310 is provided with a secondary side liquid inlet 311, and the secondary side liquid return pipe 320 is provided with a secondary side liquid return outlet 321. The second heat exchange medium flows from the heat dissipation object to the heat exchanger 400 through the secondary side liquid inlet pipe 310, and then flows back from the heat exchanger 400 to the heat dissipation object through the secondary side liquid inlet pipe 310. The secondary side liquid return pipe 320 is connected in sequence to an expansion tank 330, a liquid replenishment system, and a secondary side pump system in the direction from the heat exchanger 400 to the heat dissipation object. The secondary side liquid inlet pipeline 310 is equipped with a secondary side first temperature sensing module and a secondary side first pressure sensing module near the secondary side liquid inlet 311. The secondary side return liquid pipeline 320 between the expansion tank 330 and the replenishment system is equipped with a secondary side second pressure sensing module. The secondary side return liquid pipeline 321 between the secondary side pump system and the secondary side return liquid inlet 321 is equipped with a secondary side third pressure sensing module and a secondary side second temperature sensing module.

[0042] In this embodiment, the replenishment system includes a replenishment tank 340, a replenishment pipeline 341, and a replenishment pump 342. The replenishment tank 340 is connected to the secondary side return pipeline 320 via the replenishment pipeline 341. The replenishment pump 342 is located on the replenishment pipeline 341. A first check valve module 343 is provided on the replenishment pipeline 341 connected to the pump outlet of the replenishment pump 342. In specific implementation, to ensure that the replenishment system replenishes the secondary side return pipeline 320 in one direction, the first check valve module 343 includes a first auxiliary check valve and a first main check valve arranged along the front and rear of the replenishment pipeline 341 to obtain redundancy and provide a double insurance effect for the backflow prevention of the replenishment system. Furthermore, a secondary-side first switching valve 344 is installed on the replenishment pipeline 341 between the first check valve module 343 and the secondary-side return pipeline 320. This first switching valve acts as an isolation valve, used to cut off and connect the replenishment system to the secondary-side return pipeline 320. This is understandable, but when the first check valve module 343 needs maintenance, isolation can be achieved by closing the first switching valve. Specifically, the first switching valve can be a butterfly valve, ball valve, or similar type.

[0043] It is understood that by installing multiple pressure sensors on the secondary side return line 320, the system pressure is monitored in real time. Combined with temperature sensor data, multi-point pressure and temperature monitoring data are provided, thereby accurately controlling the pump speed and the replenishment system. In addition, the expansion tank 330 and the replenishment system maintain the pressure stability of the secondary side heat exchange module 300, ensuring that the secondary side pump system always operates in a good pressure environment, avoiding flow instability or attenuation caused by pressure fluctuations or system air intake, and enhancing the continuous and reliable flow regulation capability of the coolant distribution unit 100. Thus, the coolant distribution unit 100 of this embodiment can actively regulate the flow rate of the secondary side coolant through the secondary side pump system based on multi-point pressure and temperature monitoring, solving the problem of insufficient flow regulation capability. At the same time, the expansion tank 330 and the replenishment system together provide a guarantee for flow stability, ensuring the accuracy of flow regulation.

[0044] Continue to refer to Figure 1The replenishment system also includes an overflow pipe connected to the replenishment tank 340. Specifically, the upper part of the replenishment tank 340 is provided with an overflow port communicating with its interior. The first end of the overflow pipe is connected to the overflow port, and the second end of the overflow pipe extends to the outside and is connected to the recovery device. Preferably, a check valve is provided at the second end of the overflow pipe to prevent the overflowed second heat exchange medium from flowing back into the replenishment tank 340. To visually obtain the liquid level in the replenishment tank 340, a liquid level sensor 347 is provided.

[0045] In this embodiment, the replenishment system also includes a liquid filling pipeline 346 connected to the replenishment tank 340. Specifically, the lower part of the replenishment tank 340 is provided with a liquid filling port that communicates with its interior. The first end of the liquid filling pipeline 346 is connected to the liquid filling port, and the second end of the liquid filling pipeline 346 extends to the outside and is connected to the container for the second heat exchange medium.

[0046] refer to Figure 1 The secondary pump system includes a first circulation pump 350 and a second circulation pump 360 connected in parallel to the secondary return liquid pipeline 320. The first circulation pump 350 is connected to the secondary return liquid pipeline 320 through a secondary first auxiliary pipeline 351, and a second check valve module 352 is provided on the secondary first auxiliary pipeline 351 connected to the pump outlet of the first circulation pump 350. The second circulation pump 360 is connected to the secondary return liquid pipeline 320 through a secondary second auxiliary pipeline 361, and a third check valve module 362 is provided on the secondary second auxiliary pipeline 361 connected to the pump outlet of the second circulation pump 360.

[0047] In this embodiment, the second check valve module 352 includes a second auxiliary check valve and a second main check valve arranged before and after the first auxiliary pipeline 351 on the secondary side. The third check valve module 362 includes a third auxiliary check valve and a third main check valve arranged before and after the second auxiliary pipeline 361 on the secondary side.

[0048] In some embodiments, a drain line is included to depressurize the secondary-side heat exchange module 300. This drain line is connected to the secondary-side return line 320 between the expansion tank 330 and the secondary-side pump system. The drain line is equipped with a secondary-side second switching valve 355. (Reference) Figure 1 In this embodiment, the drainage pipeline includes a first drainage pipeline 354 connected to the inlet of the first circulation pump 350 and a second drainage pipeline 364 connected to the inlet of the second circulation pump 360. Each of the first drainage pipeline 354 and the second drainage pipeline 364 is provided with a secondary side second switching valve 355.

[0049] In some embodiments, a secondary side third switch valve 353 is provided on the secondary side first auxiliary pipeline 351 between the second check module 352 and the secondary side return pipeline 320, and a secondary side fourth switch valve 363 is provided on the secondary side second auxiliary pipeline 361 between the third check module 362 and the secondary side return pipeline 320.

[0050] In some embodiments, a secondary side fifth switching valve 356 is provided on the secondary side first auxiliary pipeline 351 connected to the pump inlet of the first circulating pump 350, and a secondary side sixth switching valve 365 is provided on the secondary side second auxiliary pipeline 361 connected to the pump inlet of the second circulating pump 360.

[0051] In some embodiments, the secondary heat exchange module 300 is also provided with a safety valve 370. The safety valve 370 is connected to the secondary return pipeline 320 between the secondary pump system and the secondary return port 321. It can be understood that the safety valve 370 can automatically depressurize the secondary heat exchange module 300, adding an extra layer of safety protection.

[0052] In some embodiments, the secondary side first temperature sensing module includes a first temperature sensor 312 and a first temperature sensor 313 disposed before and after the secondary side liquid inlet pipe 310.

[0053] In some embodiments, the secondary-side first pressure sensing module includes a first pressure sensor 314 and a second pressure sensor 315 disposed before and after the secondary-side liquid inlet pipeline 310.

[0054] In some embodiments, the secondary side second pressure sensing module includes a third pressure sensor 331 and a fourth pressure sensor 332 disposed before and after the secondary side return line 320.

[0055] In some embodiments, the secondary-side third pressure sensing module includes a fifth pressure sensor 324 and a sixth pressure sensor 325 disposed before and after the secondary-side return line 320.

[0056] In some embodiments, the secondary side second temperature sensing module includes a third temperature sensor 322 and a fourth temperature sensor 323 disposed before and after the secondary side return liquid line 320.

[0057] Understandably, by setting up two temperature sensors and two pressure sensors at the same detection point, sensors with the same detection function can be redundant, thereby improving the accuracy of the monitored parameters.

[0058] refer to Figure 1The primary-side heat exchange module 200 includes a primary-side liquid inlet pipe 210 and a primary-side liquid return pipe 220. The primary-side liquid inlet pipe 210 has a primary-side liquid inlet 211, and the primary-side liquid return pipe 220 has a primary-side liquid return outlet 221. The first heat exchange medium flows from the liquid cooling system 900 to the heat exchanger 400 through the primary-side liquid inlet pipe 210, and then flows back from the heat exchanger 400 to the liquid cooling system 900 through the primary-side liquid inlet pipe 210. The primary-side liquid inlet pipe 210 is connected to a primary-side first temperature sensing module 230 and a primary-side first pressure sensing module 240, and the primary-side liquid return pipe 220 is connected to a primary-side first temperature sensing module 250 and a primary-side second pressure sensing module 260. For on / off control, the primary-side liquid inlet 211 is equipped with a primary-side switching valve 270. To improve the accuracy of flow control, the primary-side switching valve 270 is an electrically operated two-way valve.

[0059] In this embodiment, the heat exchanger 400 is implemented using a plate heat exchanger 400.

[0060] Example 2 like Figure 2-3 As shown, this embodiment provides a liquid-cooled cabinet, including a cabinet 500, a liquid inlet distribution unit 600, a liquid return distribution unit 700, a plurality of servers 800 equipped with liquid cooling plates 810, and a coolant distribution unit 100. The liquid inlet distribution unit 600, the liquid return distribution unit 700, the servers 800, and the coolant distribution unit 100 are all located inside the cabinet 500. The liquid inlet distribution unit 600 includes a main liquid inlet and multiple branch liquid inlets connected to the main liquid inlet. The liquid return distribution unit 700 includes a main liquid return port and multiple branch liquid return ports connected to the main liquid return port. Each liquid cooling plate 810 is equipped with a cold plate liquid inlet and a cold plate liquid return port. The main liquid inlet is connected to the secondary side liquid return port 321, and each branch liquid inlet is connected to a cold plate liquid inlet. The main liquid return port is connected to the secondary side liquid inlet 311, and each branch liquid return port is connected to a cold plate liquid return port. In specific implementation, the liquid cooling plate 810 is thermally connected to the GPU and / or CPU of the server 800, thereby enabling efficient cooling of the high-heat-generating components of the server 800 using the secondary side heat exchange medium cooled by the heat exchanger 400. The outer surface of the server 800 exposes a first interface 820 and a second interface 830. The first interface 820 is connected to the cold plate inlet of the corresponding liquid cooling plate 810, and the second interface 830 is connected to the cold plate return port of the corresponding liquid cooling plate 810.

[0061] Continue to refer to Figure 2 The liquid cooling cabinet also includes a housing located inside the cabinet 500. The coolant distribution unit 100 is installed inside the housing, and the primary side inlet 211, the primary side return port 221, the secondary side inlet 311, and the secondary side return port 321 are all exposed on the surface of the housing.

[0062] In this embodiment, the coolant distribution unit 100 is located at the bottom of the cabinet 500, and the servers 800 are arranged layer by layer above the coolant distribution unit 100. The inlet distribution unit 600 adopts an inlet pipe with an extended length in the longitudinal direction, and the inlet ports are spaced apart along the longitudinal direction of the inlet pipe, so that the inlet ports are correspondingly set with the servers 800 arranged at different levels. The return distribution unit 700 adopts a return pipe with an extended length in the longitudinal direction, and the return ports are spaced apart along the longitudinal direction of the return pipe, so that the return ports are correspondingly set with the servers 800 arranged at different levels.

[0063] It is understandable that by arranging the secondary side pump system at the end of the secondary side return liquid pipeline 320 and setting it close to the secondary side return liquid port 321, the secondary side heat exchange medium can be driven to overcome gravity and enter the liquid cooling plate 810 of the server 800 from bottom to top through the inlet pipe and the corresponding cold plate inlet. After that, the secondary side heat exchange medium enters the return liquid pipeline through the corresponding cold plate return liquid port, and under the action of the secondary side pump system and gravity, it enters the heat exchanger 400 from top to bottom to exchange heat with the primary side heat exchange medium.

[0064] It should be noted that, in actual use, the heat dissipation target of this utility model can also be high-power, high-heat-flux-density electronic devices such as battery packs, rectifiers, power converters, lasers, and radio frequency equipment.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A coolant distribution unit, characterized in that, It includes a primary heat exchange module, a heat exchanger, and a secondary heat exchange module. The primary heat exchange module is used to connect to the liquid cooling system and circulate a first heat exchange medium together. The secondary heat exchange module is used to connect to the heat dissipation object and circulate a second heat exchange medium together. Both the primary heat exchange module and the secondary heat exchange module are connected to the heat exchanger so that the first heat exchange medium and the second heat exchange medium exchange heat through the heat exchanger. The secondary side heat exchange module includes a secondary side liquid inlet pipe and a secondary side liquid return pipe. The secondary side liquid inlet pipe is provided with a secondary side liquid inlet, and the secondary side liquid return pipe is provided with a secondary side liquid return outlet. The second heat exchange medium flows from the heat dissipation object to the heat exchanger through the secondary side liquid inlet pipe, and then flows back from the heat exchanger to the heat dissipation object through the secondary side liquid inlet pipe. The secondary side liquid return pipe is connected in sequence to an expansion tank, a liquid replenishment system, and a secondary side pump system in the direction from the heat exchanger to the heat dissipation object. Specifically, a secondary side first temperature sensing module and a secondary side first pressure sensing module are provided on the secondary side inlet pipe near the secondary side inlet. A secondary side second pressure sensing module is provided on the secondary side return pipe between the expansion tank and the replenishment system. A secondary side third pressure sensing module and a secondary side second temperature sensing module are provided on the secondary side return pipe between the secondary side pump system and the secondary side return port.

2. The coolant distribution unit according to claim 1, characterized in that, The replenishment system includes a replenishment tank, a replenishment pipeline, and a replenishment pump. The replenishment tank is connected to the secondary side return pipeline through the replenishment pipeline. The replenishment pump is located on the replenishment pipeline. A first check valve module is provided on the replenishment pipeline connected to the pump outlet of the replenishment pump.

3. The coolant distribution unit according to claim 2, characterized in that, The first check valve module includes a first auxiliary check valve and a first main check valve arranged before and after the replenishment pipeline; and / or, A secondary-side first switching valve is provided on the replenishment pipeline between the first check valve module and the secondary-side return pipeline; and / or, The fluid replenishment system further includes an overflow pipe connected to the fluid replenishment tank; and / or, The replenishment system also includes a replenishment pipeline connected to the replenishment tank; and / or, The replenishment tank is equipped with a liquid level sensor.

4. The coolant distribution unit according to claim 1, characterized in that, It also includes a drain pipe, which is connected to the secondary side return pipe between the expansion tank and the secondary side pump system, and the drain pipe is equipped with a secondary side second switch valve.

5. The coolant distribution unit according to claim 1, characterized in that, The secondary side pump system includes a first circulation pump and a second circulation pump connected in parallel to the secondary side return liquid pipeline. The first circulating pump is connected to the secondary side return pipeline through the secondary side first auxiliary pipeline, and a second check valve module is provided on the secondary side first auxiliary pipeline connected to the pump outlet of the first circulating pump. The second circulation pump is connected to the secondary side return pipeline through the secondary side second auxiliary pipeline, and a third check valve module is provided on the secondary side second auxiliary pipeline connected to the pump outlet of the second circulation pump.

6. The coolant distribution unit according to claim 5, characterized in that, The second check valve module includes a second auxiliary check valve and a second main check valve arranged before and after the first auxiliary pipeline on the secondary side; and / or, The third check valve module includes a third auxiliary check valve and a third main check valve arranged before and after the second auxiliary pipeline on the secondary side; and / or, A secondary-side third switching valve is provided on the first auxiliary pipeline on the secondary side between the second check valve module and the secondary-side return pipeline; and / or, A fourth secondary-side switching valve is provided on the second auxiliary pipeline on the secondary side between the third check valve module and the secondary-side return pipeline; and / or, A second-side five-switch valve is provided on the first auxiliary pipeline connected to the pump inlet of the first circulating pump; and / or, A secondary side sixth switch valve is provided on the secondary side second auxiliary pipeline connected to the pump inlet of the second circulation pump.

7. The coolant distribution unit according to claim 1, characterized in that, The secondary heat exchange module is also equipped with a safety valve, which is connected to the secondary return pipeline between the secondary pump system and the secondary return port; and / or The secondary-side first temperature sensing module includes a first temperature sensor and a second temperature sensor arranged before and after the secondary-side liquid inlet pipeline; and / or, The secondary-side first pressure sensing module includes a first pressure sensor and a second pressure sensor arranged before and after the secondary-side liquid inlet pipeline; and / or, The secondary-side second pressure sensing module includes a third pressure sensor and a fourth pressure sensor arranged before and after the secondary-side return pipeline; and / or, The secondary-side third pressure sensing module includes a fifth pressure sensor and a sixth pressure sensor arranged before and after the secondary-side return pipeline; and / or, The secondary side second temperature sensing module includes a third temperature sensor and a fourth temperature sensor arranged before and after the secondary side return liquid pipeline.

8. The coolant distribution unit according to claim 1, characterized in that, The primary-side heat exchange module includes a primary-side liquid inlet pipe and a primary-side liquid return pipe. The primary-side liquid inlet pipe has a primary-side liquid inlet, and the primary-side liquid return pipe has a primary-side liquid return outlet. The first heat exchange medium flows from the liquid cooling system to the heat exchanger through the primary-side liquid inlet pipe, and then flows back from the heat exchanger to the liquid cooling system through the primary-side liquid inlet pipe. The primary-side liquid inlet pipe is connected to a primary-side first temperature sensor module and a primary-side first pressure sensor module, and the primary-side liquid return pipe is connected to a primary-side second temperature sensor module and a primary-side second pressure sensor module; and / or, The heat exchanger is a plate heat exchanger.

9. A liquid-cooled cabinet, characterized in that, It includes a cabinet, a liquid inlet distribution unit, a liquid return distribution unit, several heat dissipation objects equipped with liquid cooling plates, and a coolant distribution unit as described in any one of claims 1-8, wherein the liquid inlet distribution unit, the liquid return distribution unit, the heat dissipation objects, and the coolant distribution unit are all disposed within the cabinet. The liquid inlet distribution unit includes a main liquid inlet and multiple branch liquid inlets connected to the main liquid inlet. The liquid return distribution unit includes a main liquid return port and multiple branch liquid return ports connected to the main liquid return port. Each liquid cooling plate is provided with a cold plate liquid inlet and a cold plate liquid return port. The main liquid inlet is connected to the secondary side liquid return port. Each branch liquid inlet is connected to the cold plate liquid inlet. The main liquid return port is connected to the secondary side liquid inlet. Each branch liquid return port is connected to the cold plate liquid return port.

10. The liquid-cooled cabinet according to claim 9, characterized in that, It also includes a housing disposed within the cabinet, the coolant distribution unit being installed within the housing, and the primary side inlet, primary side return outlet, secondary side inlet, and secondary side return outlet all being exposed on the surface of the housing; and / or, The coolant distribution unit is located at the bottom of the cabinet, and the heat dissipation objects are arranged layer by layer above the coolant distribution unit; and / or, The object to be cooled is the server.

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