Cooling system of liquid cooling server and liquid cooling server

Abstract

The invention discloses a liquid cooling server heat dissipation system and a liquid cooling server, and relates to the technical field of server heat dissipation. The cooling liquid inlet main pipeline is connected with the cold plate assembly; the cooling liquid return main pipeline is connected with the cold plate assembly; the cooling liquid return first branch and the cooling liquid return second branch are connected with the cooling liquid return main pipeline through flow distribution pieces; the first heat exchange device is connected with the cooling liquid return first branch and used for cooling the cooling liquid in the cooling liquid return first branch; the second heat exchange device is connected with the first heat exchange device and the second cooling liquid return branch and used for mixing the cooling liquid cooled by the first heat exchange device with the cooling liquid of the second cooling liquid return branch so as to obtain the mixed and cooled cooling liquid, and the second heat exchange device is connected with an inlet of the cooling liquid inlet main pipeline so as to obtain the mixed and cooled cooling liquid. And cooling liquid is supplied to the cooling liquid inlet main pipeline. The problem of high power consumption of the cooling system of the liquid cooling server is solved, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of server heat dissipation technology, and more specifically, to a liquid-cooled server heat dissipation system and a liquid-cooled server. Background Technology

[0002] With the rapid development of information and data technologies and their applications, higher demands are being placed on servers. In order to meet the heat dissipation needs of servers and data center computer rooms, liquid cooling server heat dissipation systems are playing an increasingly crucial role in servers.

[0003] However, the liquid-cooled server heat dissipation system in the related technology includes a cooling system loop and a coolant system loop that circulate independently. The coolant system loop circulates independently and is used to dissipate heat and cool the load. The cooling system loop is used to realize the circulation of refrigerant. The cooling system loop and the coolant system loop exchange heat in a heat exchanger. The refrigerant in the cooling system loop is used to cool the coolant in the coolant system loop to ensure that the coolant can be delivered to the load side.

[0004] However, this system structure utilizes the refrigerant in the refrigeration system loop to exchange heat and cool all the coolant in the coolant system loop. It cannot flexibly adjust the operating status of each device in the system according to the load. When the load is small, it is impossible to adjust the operating status of each component device to a low-power state, which to some extent leads to a waste of resources.

[0005] In conclusion, how to reduce the power consumption of liquid-cooled server heat dissipation systems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] This application provides a liquid-cooled server heat dissipation system to at least solve the problem of high power consumption in liquid-cooled server heat dissipation systems in related technologies.

[0007] This application provides a liquid-cooled server heat dissipation system, including: Cold plate assemblies are used to cool the load. The coolant inlet main pipe is connected to the cold plate assembly and is used to supply coolant to the cold plate assembly; The coolant return main line is connected to the cold plate assembly and is used to transport the coolant that has absorbed the load heat flowing out of the cold plate assembly. The first coolant return branch and the second coolant return branch are connected to the main coolant return pipeline via a flow distribution device. The first heat exchange device is connected to the first branch of the coolant return line and is used to cool the coolant in the first branch of the coolant return line. The second heat exchange device is connected to the first heat exchange device and the second branch of the coolant return line, respectively. It is used to mix the coolant cooled by the first heat exchange device with the coolant in the second branch of the coolant return line to obtain a mixed and cooled coolant. The second heat exchange device is connected to the inlet of the main coolant inlet line to supply the mixed and cooled coolant to the main coolant inlet line.

[0008] This application also provides a server, including the above-described liquid-cooled server heat dissipation system.

[0009] Through this application, since the coolant in the coolant return main pipe is split into two by the flow distributor, entering the first coolant return branch and the second coolant return branch respectively, the flow rate of the coolant entering the first and second coolant return branches can be adjusted by regulating the flow rate of the coolant entering the first and second coolant return branches. This allows for the adjustment of the cooling capacity of the first heat exchanger and the flow rate of the coolant in the second heat exchanger after being cooled by the first heat exchanger, as well as the flow rate of the coolant flowing into the second heat exchanger from the second coolant return branch. Thus, the temperature of the coolant in the second heat exchanger is regulated. In other words, by... A portion of the coolant in the coolant return main line (the coolant entering the first branch of the coolant return line) is cooled for heat dissipation. By adjusting the flow distribution component, the proportion of coolant entering the first heat exchanger is adjustable. This allows for flexible adjustment of the system's operating state based on the load's cooling requirements. When the load's cooling demand is low, less coolant can be used for cooling, keeping the equipment operating at low power consumption and reducing resource waste. Simultaneously, adjusting the flow distribution component's proportions facilitates effective adaptation to the specific cooling needs of various servers. Precise control of the flow distribution component's adjustment ratio allows the coolant at the cold plate assembly to be maintained at the required temperature. Furthermore, controlling the adjustment range of the flow distribution component enables ultra-wide-range coolant adjustment, better meeting the diverse operational needs of the cold plate assembly load.

[0010] Furthermore, by treating the first branch of the coolant return line as a branch of the main coolant return line, the coolant in the first branch of the coolant return line enters the first heat exchanger and then the second heat exchanger. The drive pump of the main circulation loop between the second heat exchanger and the cold plate assembly can be used as the drive pump of the refrigeration loop of the coolant in the first branch of the coolant return line, providing circulation power for the refrigeration loop of the coolant in the first branch of the coolant return line. In other words, this scheme can realize a single-pump integrated design for coolant heat exchange and circulation drive, saving pump drive components, reducing costs, and simplifying control logic.

[0011] Therefore, this application can solve the technical problem of high power consumption in liquid-cooled server heat dissipation systems in related technologies, achieve the technical effect of reducing energy consumption, and also has the technical effects of ultra-wide range adjustment of coolant temperature, saving pump drive components, and reducing costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a liquid-cooled server heat dissipation system provided in a specific embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the first branch of coolant return, the first heat exchange device, and the second branch of coolant return.

[0015] Figure 3 This is a schematic diagram showing a refrigerant coil installed inside the second heat exchanger.

[0016] Figure 4 This is a schematic diagram of the first cold source refrigeration system.

[0017] Figure 5 This is a schematic diagram of the coolant inlet manifold, the cold plate assembly, and the coolant return manifold.

[0018] Figure 6 This is a schematic diagram of a liquid-cooled server heat dissipation system provided in another specific embodiment of the present invention.

[0019] Figure label: 1-Cold plate assembly; 2-Main coolant inlet pipe; 21-Branch coolant inlet pipe; 211-Seventh temperature sensor; 212-Sixth pressure sensor; 22-Bypass coolant inlet pipe; 221-Coolant flow regulating device; 23-Coolant sterilization device; 24-Coolant visual monitoring device; 25-Coolant filter device; 26-Coolant filter device inlet valve; 27-Coolant filter device outlet valve; 28-Eighth pressure sensor; 29-Ninth pressure sensor; 3-Main coolant return pipe; 31-Eighth temperature sensor; 32-Seventh pressure sensor; 33-Coolant pump drive assembly; 331-Coolant drive pump inlet damping assembly; 332-Coolant drive pump outlet damping assembly; 333-Coolant return inlet valve; 334-Coolant return outlet valve; 34-First check valve; 35-Coolant return pump drive safety overflow device; 36-Third flow sensor; 37-Fourth flow sensor; 38-Second check valve; 41-Coolant return first branch; 411-First flow sensor; 41 2-First temperature sensor; 413-First pressure sensor; 42-Second branch of coolant return; 421-Second flow sensor; 422-Third check valve; 43-Flow distribution unit; 44-Coolant return manifold; 45-Coolant heat exchange return branch; 451-Second temperature sensor; 452-Second pressure sensor; 453-Fourth check valve; 5-First heat exchanger; 51-Air-cooled coil; 52-Fan; 53-Refrigerant passage; 54-Coolant passage; 6-Second heat exchanger; 6 1- Ninth temperature sensor; 62- Tenth pressure sensor; 7- First cold source refrigeration system; 71- Refrigerant coil; 711- Third temperature sensor; 712- Third pressure sensor; 72- Refrigeration compressor; 721- Fourth temperature sensor; 722- Fourth pressure sensor; 73- Refrigeration heat dissipation device; 731- Fifth temperature sensor; 74- Refrigeration throttling and pressure reduction device; 741- Sixth temperature sensor; 742- Fifth pressure sensor; 75- Gas-liquid separation device; 8- Second cold source refrigeration system. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0021] It should be noted 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," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to Figure 1This invention provides a liquid-cooled server heat dissipation system, including a cold plate assembly 1, a coolant inlet main pipe 2, a coolant return main pipe 3, a first coolant return branch pipe 41, a second coolant return branch pipe 42, a first heat exchange device 5, and a second heat exchange device 6. The cold plate assembly 1 is used to cool the load; the coolant inlet main pipe 2 is connected to the cold plate assembly 1 and is used to supply coolant to the cold plate assembly 1; the coolant return main pipe 3 is connected to the cold plate assembly 1 and is used to supply coolant that has absorbed heat from the load flowing out of the cold plate assembly 1; the first coolant return branch pipe 41 and the second coolant return branch pipe 42... The flow distribution device 43 connects to the main coolant return line 3; the first heat exchange device 5 connects to the first branch of the coolant return line 41 and is used to cool the coolant in the first branch of the coolant return line 41; the second heat exchange device 6 connects to the first heat exchange device 5 and the second branch of the coolant return line 42 respectively and is used to mix the coolant cooled by the first heat exchange device 5 with the coolant in the second branch of the coolant return line 42 to obtain a mixed and cooled coolant, and the second heat exchange device 6 connects to the inlet of the main coolant inlet line 2 to supply the mixed and cooled coolant to the main coolant inlet line 2. During operation, the coolant from the second heat exchanger 6 enters the coolant inlet manifold 2, which then supplies coolant to the cold plate assembly 1, allowing the cold plate assembly 1 to cool the load. The cooled coolant, now at a higher temperature, flows into the coolant return manifold 3. The coolant in the return manifold 3 is split into two by the flow distributor 43, entering the first return branch 41 and the second return branch 42 respectively. The coolant entering the first return branch 41 flows into the first heat exchanger 5, where it is used to cool the load. The coolant in the first branch of the coolant return line 41 is cooled down. After being cooled by the first heat exchanger 5, the coolant enters the second heat exchanger 6. At the same time, the coolant entering the second branch of the coolant return line 42 flows into the second heat exchanger 6. The coolant cooled by the first heat exchanger 5 and the coolant in the second branch of the coolant return line 42 are finally mixed in the second heat exchanger 6 to obtain a mixed and cooled coolant. This coolant flows into the main coolant inlet pipe 2 to deliver the mixed and cooled coolant to the cold plate assembly 1. This cycle is repeated to meet the coolant supply requirements of the cold plate assembly 1.

[0024] Additionally, it is understandable that the coolant in the main coolant return line 3 is split into two by the flow distributor 43, entering the first coolant return branch 41 and the second coolant return branch 42 respectively. By adjusting the flow rate of the coolant entering the first coolant return branch 41 and the second coolant return branch 42 through the flow distributor 43, the cooling capacity of the first heat exchanger 5 can be adjusted, as can the flow rate of the coolant in the second heat exchanger 6 after being cooled by the first heat exchanger 5 and the coolant flowing into the second heat exchanger 6 from the second coolant return branch 42, thereby achieving temperature regulation of the coolant in the second heat exchanger 6. In other words, this embodiment cools a portion of the coolant in the main coolant return pipe 3 (the coolant entering the first branch coolant return pipe 41) by dissipating heat. Furthermore, by adjusting the flow distribution component 43, the proportion of coolant entering the first heat exchange device 5 is adjustable. This allows for flexible adjustment of the system's operating state based on the load's heat dissipation requirements. When the load's heat dissipation requirements are low, less coolant can be used for cooling, keeping the equipment operating at low power consumption and reducing resource waste. Simultaneously, adjusting the flow distribution component 43 facilitates effective adaptation to various server-specific heat dissipation needs. By precisely controlling the adjustment ratio of the flow distribution component 43, the required coolant temperature at the cold plate assembly 1 can be maintained. Moreover, by controlling the adjustment range of the flow distribution component 43, ultra-wide-range coolant adjustment can be achieved, which is beneficial for meeting the multi-scenario operating needs of the load at the cold plate assembly 1.

[0025] Furthermore, by treating the first branch of the coolant return line 41 as a branch of the main coolant return line 3, the coolant in the first branch of the coolant return line 41 enters the first heat exchanger 5 and then the second heat exchanger 6. The drive pump of the total circulation loop between the second heat exchanger 6 and the cold plate assembly 1 can be used as the drive pump of the refrigeration loop of the coolant in the first branch of the coolant return line 41, providing circulation power for the refrigeration loop of the coolant in the first branch of the coolant return line 41. In other words, this scheme can realize the integrated design of a single pump for coolant heat exchange and circulation drive, saving pump drive components, reducing costs, and simplifying control logic.

[0026] Furthermore, such as Figure 1 and Figure 3 As shown, in some embodiments, the second heat exchange device 6 includes a temperature-controlled liquid storage tank, which is connected to the first heat exchange device 5 and the second branch of the coolant return line 42, respectively. The temperature-controlled liquid storage tank is provided with a refrigerant coil 71, which is connected to the first cold source refrigeration system 7. The first cold source refrigeration system 7 is used to circulate the first refrigerant and deliver the first refrigerant to the refrigerant coil 71.

[0027] During operation, the coolant cooled by the first heat exchanger 5 enters the second heat exchanger 6. At the same time, the coolant entering the second coolant return branch 42 flows into the second heat exchanger 6. The coolant cooled by the first heat exchanger 5 and the coolant in the second coolant return branch 42 mix in the temperature-controlled storage tank. The mixed solution exchanges heat with the first refrigerant in the refrigerant coil 71, thereby further cooling the mixed coolant in the temperature-controlled storage tank.

[0028] In other words, this embodiment sets up a temperature-controlled liquid storage tank, so that the cooled coolant flowing out of the first heat exchange device 5 mixes with the coolant flowing out of the second branch of the coolant return line 42. Furthermore, by setting up a refrigerant coil 71 in the temperature-controlled liquid storage tank, the first refrigerant flowing in the refrigerant coil 71 is used to cool the mixed coolant in the temperature-controlled liquid storage tank. That is, in this embodiment, the coolant returning from the main coolant return line 3 undergoes two cooling cycles before finally being output from the second heat exchange device 6, which helps to ensure that the coolant has a sufficiently low temperature and provides a supplementary cooling effect.

[0029] It should be noted that the above embodiments do not limit the specific structure and heat exchange method of the first heat exchange device 5, as long as it can cool the coolant flowing into the first heat exchange device 5 through the first branch 41 of the coolant return.

[0030] In some embodiments, the first heat exchange device 5 is a natural cooling device.

[0031] In other words, this embodiment uses a natural cooling device to cool the coolant flowing into the first heat exchange device 5 through the first branch 41 of the coolant return. That is, it uses natural principles (such as evaporation, radiation, or thermodynamic cycles) to achieve cooling, which can reduce energy consumption and cooling costs.

[0032] It should be noted that the specific structure of the natural cooling device is not limited in this embodiment, as long as it can achieve natural cooling of the coolant flowing into the first heat exchange device 5 through the first branch 41 of the coolant return.

[0033] Please combine Figure 1 and Figure 2 In some embodiments, the first heat exchange device 5 includes an air-cooled coil 51 and a fan 52. The air-cooled coil 51 is connected to the first branch of the coolant return line 41 and the second heat exchange device 6, respectively. The fan 52 is provided corresponding to the air-cooled coil 51 to deliver cold air to the air-cooled coil 51.

[0034] Understandably, during operation, the coolant flowing from the first coolant return branch 41 enters the air-cooled coil 51 and flows along it, eventually flowing into the second heat exchange device 6. During this process, the fan 52 blows cool air onto the air-cooled coil 51, allowing the coolant inside to exchange heat with the cooling air outside. In other words, it utilizes natural cold source to cool the coolant flowing from the first coolant return branch 41, achieving the purpose of cooling the coolant transported by the first coolant return branch 41. That is, by using the air-cooled coil 51 technology combined with the intelligent frequency conversion control technology of the fan 52, the heat carried by the coolant can be released into the natural environment, thereby achieving the cooling and heat dissipation operation of the coolant. This solution has a simple structure, low cost, and low energy consumption.

[0035] Additionally, it should be noted that when the temperature-controlled liquid storage tank of the second heat exchange device 6 is equipped with a refrigerant coil 71, since the refrigerant coil 71 is connected to the first cold source refrigeration system 7, the first cold source refrigeration system 7 is used to supply the first refrigerant for circulation and to deliver the first refrigerant to the refrigerant coil 71. That is, the refrigerant coil 71 mechanically forces the mixed coolant in the temperature-controlled liquid storage tank to cool down. In this case, based on the natural cooling of the coolant in the first heat exchange device 5 by the natural refrigeration device, the mechanical refrigeration is combined to provide reinforcement. That is, the coolant is cooled down by natural refrigeration as the main method and mechanical refrigeration is used for supplementary cooling. Understandably, the operation of the refrigerant coil 71 can be selected based on the ambient temperature. That is, when the ambient temperature is low, only the first heat exchange device 5 can be used to cool the coolant. When the ambient temperature is relatively high, the first cold source refrigeration system 7 can be activated, allowing the refrigerant coil 71 to participate in the refrigeration work. At the same time, by controlling the ratio of the low-temperature refrigerant generated by mechanical refrigeration to the coolant produced by natural refrigeration, an ultra-wide temperature coolant can be achieved. This dual refrigeration supplementary cooling technology can significantly improve the energy efficiency of the equipment.

[0036] In addition, such as Figure 2 As shown, in some embodiments, the liquid-cooled server heat dissipation system further includes a coolant return manifold 44, which is connected to the outlet of the first heat exchange device 5 and the second coolant return branch 42, and is also connected to the second heat exchange device 6.

[0037] In other words, the cooled coolant flowing out of the first heat exchanger 5 and the coolant flowing out of the second coolant return branch 42 first merge in the coolant return manifold 44 before flowing into the second heat exchanger 6. This ensures that the coolant in the second heat exchanger 6 is mixed more evenly and the temperature is more stable, avoiding uneven mixing of the coolant in the second heat exchanger 6 that leads to uneven local temperature, and also reduces the impact on the coolant in the second heat exchanger 6.

[0038] In addition, to facilitate the control of the flow distribution component 43 and to precisely control the temperature of the coolant in the second heat exchanger 6, such as... Figure 2 As shown, in some embodiments, the flow distribution component 43 is a flow distribution regulating valve. The flow distribution regulating valve is connected to the control device of the liquid-cooled server heat dissipation system. The control device is used to adjust the opening of the flow distribution regulating valve according to the temperature of the coolant in the second heat exchange device 6. The first coolant return branch 41 and the second coolant return branch 42 are respectively provided with a first flow sensor 411 and a second flow sensor 421. The first flow sensor 411 and the second flow sensor 421 are respectively connected to the control device to enable the control device to perform feedback control on the flow distribution regulating valve.

[0039] In other words, this embodiment adjusts the opening of the flow distribution regulating valve in real time according to the temperature of the coolant in the second heat exchanger 6, thereby adjusting the ratio of coolant entering the first coolant return branch 41 and the first heat exchanger 5 to the coolant entering the second heat exchanger 6, thus achieving temperature regulation of the coolant in the heat exchanger. Furthermore, this embodiment uses a first flow sensor 411 to monitor the flow rate of coolant entering the first coolant return branch 41 in real time, and a second flow sensor 421 to monitor the flow rate of coolant entering the second coolant return branch 42 in real time. This means monitoring the flow rate of coolant entering the first heat exchanger 5 and the second heat exchanger 6, and feeding the monitoring results back to the control device. The control device then adjusts the flow distribution regulating valve according to the monitoring results, ensuring that the opening of the flow distribution regulating valve meets the usage requirements, thereby ensuring that the coolant in the second heat exchanger 6 meets the usage requirements.

[0040] It should be noted that, as Figure 3 As shown, the second heat exchange device 6 is equipped with a ninth temperature sensor 61 and a tenth pressure sensor 62. The ninth temperature sensor 61 is used to detect the temperature of the coolant in the second heat exchange device 6, and the tenth pressure sensor 62 is used to detect the pressure of the coolant in the second heat exchange device 6. The ninth temperature sensor 61 and the tenth pressure sensor 62 are respectively connected to the control device to feed back the temperature data and pressure data of the coolant in the second heat exchange device 6 to the control device.

[0041] In addition, in order to monitor the heat exchange effect and operating status of the first heat exchange device 5 in real time, such as Figure 2As shown, in some embodiments, the first branch of the coolant return path 41 is equipped with a first temperature sensor 412 and a first pressure sensor 413; the outlet of the first heat exchange device 5 is connected to a coolant heat exchange return path 45, and the coolant heat exchange return path 45 is equipped with a second temperature sensor 451 and a second pressure sensor 452; the first temperature sensor 412, the first pressure sensor 413, the second temperature sensor 451 and the second pressure sensor 452 are respectively connected to the control device of the liquid-cooled server heat dissipation system, and the control device is used to monitor the heat exchange effect and operating status of the first heat exchange device 5 according to the monitoring data of the first temperature sensor 412, the first pressure sensor 413, the second temperature sensor 451 and the second pressure sensor 452.

[0042] In other words, this embodiment uses a first temperature sensor 412 and a first pressure sensor 413 to detect the temperature and pressure of the coolant before it enters the first heat exchanger 5, and a second temperature sensor 451 and a second pressure sensor 452 to detect the temperature and pressure of the coolant flowing out of the first heat exchanger 5. By monitoring the temperature and pressure of the coolant before and after passing through the first heat exchanger 5, and using the detection data from the first temperature sensor 412, the first pressure sensor 413, the second temperature sensor 451, and the second pressure sensor 452, the heat exchange effect and operating status of the first heat exchanger 5 are determined, ensuring the reliable operation of the first heat exchanger 5 and the reliability of cooling the coolant. It is understood that the fan speed can also be controlled based on the detection data from the first temperature sensor 412, the first pressure sensor 413, the second temperature sensor 451, and the second pressure sensor 452, thereby enabling the natural cooling device to have a better natural cooling effect.

[0043] In addition, in some embodiments, the second coolant return branch 42 is provided with a third check valve 422, and the coolant heat exchange return branch 45 is provided with a fourth check valve 453 to prevent coolant backflow.

[0044] In addition, the above embodiments do not limit the specific structure and principle of the first cold source refrigeration system 7, as long as the first cold source refrigeration system 7 can circulate the first refrigerant and deliver the first refrigerant to the refrigerant coil 71.

[0045] like Figure 1 and Figure 4 As shown, in some embodiments, the first cold source refrigeration system 7 includes a refrigeration compressor 72, a refrigeration heat dissipation device 73 and a refrigeration throttling and pressure reducing device 74 connected in sequence, and the two ends of the refrigerant coil 71 are respectively connected to the refrigeration compressor 72 and the refrigeration throttling and pressure reducing device 74.

[0046] In other words, in this embodiment, the first cold source refrigeration system 7 utilizes the combined action of the refrigeration compressor 72, the refrigeration heat dissipation device 73, the refrigeration throttling and pressure reducing device 74, and the refrigerant coil 71 to achieve the circulation of the first refrigerant. It also utilizes the principle of heat absorption during vaporization and heat release during liquefaction of the first refrigerant to absorb the temperature of the mixed coolant in the temperature-controlled storage tank and release this temperature to the refrigeration heat dissipation device 73, thereby cooling the coolant and preparing the low-temperature coolant. It can be understood that the refrigeration compressor 72 mainly compresses the low-temperature, low-pressure refrigerant, after heat exchange with the coolant in the temperature-controlled storage tank of the second heat exchange device 6 via the refrigerant coil 71, into a high-temperature, high-pressure gas, providing power for the refrigeration cycle, thus realizing the refrigeration cycle of first refrigerant compression → condensation (heat release) → expansion → evaporation (heat absorption). The refrigeration and heat dissipation device 73 is mainly used to release the heat carried by the high-temperature and high-pressure refrigerant gas output by the refrigeration compressor 72 into the environment using media such as air or cooling water, and to convert the first refrigerant into a medium-temperature and high-pressure liquefied state, thus completing the heat dissipation and cooling operation of the first refrigerant. The refrigeration throttling and pressure reduction device 74 is mainly used to throttle the medium-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure vapor, so that it can fully exchange heat with the coolant in the temperature-controlled liquid storage tank of the second heat exchange device 6 in the refrigerant coil 71, thereby achieving heat dissipation and cooling of the coolant. This structure of the first cold source refrigeration system 7 is simple and easy to implement.

[0047] Furthermore, in order to monitor the operating status and cooling effect of the first cold source refrigeration system 7, such as... Figure 4As shown, in some embodiments, the pipeline between the refrigeration compressor 72 and the refrigerant coil 71 is equipped with a third temperature sensor 711 and a third pressure sensor 712; the pipeline between the refrigeration compressor 72 and the refrigeration heat dissipation device 73 is equipped with a fourth temperature sensor 721 and a fourth pressure sensor 722; the pipeline between the refrigeration heat dissipation device 73 and the refrigeration throttling and pressure reducing device 74 is equipped with a fifth temperature sensor 731; the pipeline between the refrigeration throttling and pressure reducing device 74 and the refrigerant coil 71 is equipped with a sixth temperature sensor 741 and a fifth pressure sensor 742; the third temperature sensor 711, the third pressure sensor 712, the fourth temperature sensor 721, the fourth pressure sensor 722, and the fifth temperature sensor 731 are all present. 1. The sixth temperature sensor 741 and the fifth pressure sensor 742 are respectively connected to the control device of the liquid-cooled server heat dissipation system; the control device is used to monitor the operating status of the refrigeration compressor 72 based on the monitoring data of the third temperature sensor 711, the third pressure sensor 712, the fourth temperature sensor 721 and the fourth pressure sensor 722; and to monitor the operating status of the refrigeration heat dissipation device 73 based on the monitoring data of the fifth temperature sensor 731 and the fourth temperature sensor 721; and to monitor the cooling effect of the first cold source refrigeration system 7 based on the monitoring data of the sixth temperature sensor 741, the fifth pressure sensor 742, the third temperature sensor 711 and the third pressure sensor 712.

[0048] Understandably, the third temperature sensor 711 is used to detect the temperature of the first refrigerant flowing from the refrigerant coil 71 before it enters the refrigeration compressor 72, and the fourth temperature sensor 721 is used to detect the temperature of the first refrigerant flowing from the refrigeration compressor 72. Based on the detection data of the third temperature sensor 711 and the fourth temperature sensor 721, the control device can adjust the operating state of the refrigeration compressor 72. Simultaneously, the third pressure sensor 712 is used to detect the pressure of the first refrigerant flowing from the refrigerant coil 71 before it enters the refrigeration compressor 72, and the fourth pressure sensor 722 is used to detect the pressure of the first refrigerant flowing from the refrigeration compressor 72. Combining the detection data of the third temperature sensor 711, the third pressure sensor 712, the fourth temperature sensor 721, and the fourth pressure sensor 722, the control device can determine the operating state of the refrigeration compressor 72, thereby enabling monitoring and adjustment of the refrigeration compressor 72's operating state. It should be noted that the third pressure sensor 712 and the fourth pressure sensor 722 can each employ pressure-sensing components with valves, facilitating calibration or replacement of the pressure-sensing components without shutting down the liquid-cooled server cooling system.

[0049] In addition, the fifth temperature sensor 731 is used to acquire the temperature data of the refrigerant in the medium-temperature high-pressure liquid-cooled state output by the refrigeration and heat dissipation device 73. Combined with the temperature data of the first refrigerant flowing out of the refrigeration compressor 72 before entering the refrigeration and heat dissipation device 73 detected by the fourth temperature sensor 721, the operating status of the refrigeration and heat dissipation device 73 can be monitored and adjusted.

[0050] In addition, the sixth temperature sensor 741 is used to detect the temperature of the low-temperature, low-pressure wet vapor refrigerant flowing out of the refrigeration throttling and depressurizing device 74 before entering the refrigerant coil 71; the fifth pressure sensor 742 is used to detect the pressure of the low-temperature, low-pressure wet vapor refrigerant flowing out of the refrigeration throttling and depressurizing device 74 before entering the refrigerant coil 71. Based on the detection data of the sixth temperature sensor 741 and the fifth pressure sensor 742, the status monitoring and adjustment of the refrigeration throttling and depressurizing device 74 can be performed. Furthermore, based on the detection data of the sixth temperature sensor 741, the fifth pressure sensor 742, the third temperature sensor 711, and the third pressure sensor 712, the operating status of the refrigerant coil 71 can be determined, thereby enabling the assessment of the refrigerant heat exchange effect.

[0051] Furthermore, in some embodiments, a gas-liquid separation device 75 is provided between the cooling and heat dissipation device 73 and the cooling throttling and pressure reduction device 74.

[0052] It should be noted that the gas-liquid separation device 75 is used to filter and dehumidify the medium-temperature, high-pressure liquid-cooled refrigerant output from the cooling and heat dissipation device 73, preventing problems such as pipe blockage caused by excessive water content or impurities in the first refrigerant, and effectively reducing the occurrence of liquid-cooled server heat dissipation system failures.

[0053] In addition, the first heat exchange device 5 can be a natural refrigeration device or other refrigeration devices.

[0054] like Figure 6 As shown, in some embodiments, the first heat exchange device 5 includes a refrigerant channel 53 and a coolant channel 54. The refrigerant channel 53 forms a refrigerant circulation loop with the second cold source refrigeration system 8. The second cold source refrigeration system 8 is used to circulate the second refrigerant and deliver the second refrigerant to the refrigerant channel 53. The coolant channel 54 is connected to the first coolant return branch 41 and the second heat exchange device 6 respectively, so that the coolant can pass through. The coolant channel 54 and the refrigerant channel 53 are arranged in a preset manner so that the second refrigerant and the coolant can exchange heat.

[0055] In other words, in this embodiment, the first heat exchange device 5 is used to realize the heat exchange between the coolant in the first branch of the coolant return path 41 and the second refrigerant in the refrigerant channel 53, and to use the second refrigerant in the refrigerant channel 53 to cool the coolant in the coolant channel 54. For example, the first heat exchange device 5 can be a plate heat exchanger, such as a brazed integrated heat exchanger.

[0056] Since the refrigerant channel 53 and the second cold source refrigeration system 8 form a refrigerant circulation loop, the first heat exchange device 5, in conjunction with the second cold source refrigeration system 8, is equivalent to forming mechanical forced refrigeration. That is, in this embodiment, the first heat exchange device 5 adopts a different scheme from natural refrigeration.

[0057] It should be noted that this embodiment does not limit the specific structure and principle of the second cold source refrigeration system 8. The specific settings of the second cold source refrigeration system 8 can be referred to the first cold source refrigeration system 7 described above, and will not be repeated here.

[0058] Additionally, when the server's load requires a lower volume of constant-temperature coolant from the cold plate assembly 1 than the minimum flow rate of coolant supplied by the main coolant inlet pipe 2, to avoid excessive cooling of the load, such as... Figure 5 As shown, in some embodiments, the outlet of the coolant inlet main pipe 2 is connected to the coolant inlet branch pipe 21 and the coolant inlet bypass branch pipe 22, respectively. The coolant inlet branch pipe 21 is connected to the cold plate assembly 1, and the coolant inlet bypass branch pipe 22 is connected to the coolant return main pipe 3. One of the coolant inlet bypass branch pipe 22 and the coolant inlet branch pipe 21 is provided with a coolant flow regulating device 221.

[0059] In other words, this embodiment achieves the diversion of the coolant supply to the cold plate assembly 1 by setting up a coolant inlet bypass branch 22. When the amount of constant temperature coolant required by the load for the cold plate assembly 1 is lower than the minimum flow rate of coolant delivered by the coolant inlet main pipe 2, the coolant inlet bypass branch 22 is used to ensure that part of the coolant delivered by the coolant inlet main pipe 2 no longer flows through the cold plate assembly 1 to exchange heat and cool the load. Instead, the excess coolant flows directly into the coolant return main pipe 3 through the coolant inlet bypass branch 22, thus avoiding excessive cooling of the load. Additionally, it is understood that one of the coolant inlet bypass branch 22 and coolant inlet branch 21 is provided with a coolant flow regulating device 221. For example, the coolant flow regulating device 221 is provided in the coolant inlet bypass branch 22. By adjusting the opening of the coolant flow regulating device 221, the flow rate through the coolant inlet bypass branch 22 and the cold plate assembly 1 can be adjusted, thereby meeting the different requirements of the constant temperature coolant for the load.

[0060] In addition, to facilitate monitoring of the heat exchange effect and operating status of the cold plate assembly 1, such as... Figure 5 As shown, in some embodiments, the coolant inlet branch 21 is equipped with a seventh temperature sensor 211 and a sixth pressure sensor 212; the pipeline between the connection point of the coolant return main pipeline 3 and the coolant inlet bypass branch 22 and the cold plate assembly 1 is equipped with an eighth temperature sensor 31 and a seventh pressure sensor 32; the seventh temperature sensor 211, the sixth pressure sensor 212, the eighth temperature sensor 31 and the seventh pressure sensor 32 are respectively connected to the control device of the liquid-cooled server heat dissipation system, and the control device is used to monitor the heat exchange effect and operating status of the cold plate assembly 1 based on the monitoring data of the seventh temperature sensor 211, the sixth pressure sensor 212, the eighth temperature sensor 31 and the seventh pressure sensor 32.

[0061] Understandably, the seventh temperature sensor 211 can detect the temperature of the coolant before it enters the cold plate assembly 1 through the coolant inlet branch 21, the sixth pressure sensor 212 can detect the pressure of the coolant before it enters the cold plate assembly 1 through the coolant inlet branch 21, the eighth temperature sensor 31 can detect the temperature of the coolant flowing out of the cold plate assembly 1 after heat exchange with the load, and the seventh pressure sensor 32 can detect the pressure of the coolant flowing out of the cold plate assembly 1 after heat exchange with the load. Therefore, based on the detection data of the seventh temperature sensor 211, the sixth pressure sensor 212, the eighth temperature sensor 31, and the seventh pressure sensor 32, the heat exchange effect and operating status of the cold plate assembly 1 can be determined.

[0062] In addition, such as Figure 5 As shown, in some embodiments, the coolant inlet main pipe 2 is equipped with a coolant sterilization device 23 and / or a coolant visualization monitoring device 24. The coolant sterilization device 23 is used to disinfect microorganisms and bacteria in the coolant; the coolant visualization monitoring device 24 is used to monitor the coolant circulation status.

[0063] It should be noted that the coolant sterilization device 23 is used to disinfect microorganisms and bacteria in the coolant, preventing coolant contamination or corrosion damage to components of the liquid-cooled server's heat dissipation system due to excessive microorganisms and bacteria. For example, the coolant sterilization device 23 is a coolant ultraviolet sterilization device, that is, it uses ultraviolet sterilization technology to actively disinfect microorganisms and bacteria in the coolant. The coolant visualization monitoring device 24 is mainly used to monitor and view the coolant circulation status. For example, the coolant visualization monitoring device 24 uses transparent tempered glass, allowing personnel to intuitively and clearly observe the coolant circulation status at close range. For instance, the coolant visualization monitoring device 24 can be used to observe the coolant's turbidity, impurities, and the amount of bubbles in the water.

[0064] In addition, such as Figure 5 As shown, in some embodiments, the coolant inlet main pipe 2 is equipped with a coolant filter device 25, a coolant filter device inlet valve 26, a coolant filter device outlet valve 27, an eighth pressure sensor 28, and a ninth pressure sensor 29. The coolant filter device inlet valve 26 and the coolant filter device outlet valve 27 are respectively located on both sides of the coolant filter device 25. The eighth pressure sensor 28 is located on the inlet side of the coolant filter device inlet valve 26, and the ninth pressure sensor 29 is located on the outlet side of the coolant filter device outlet valve 27. The eighth pressure sensor 28 and the ninth pressure sensor 29 are respectively connected to the control device of the liquid-cooled server heat dissipation system. The control device is used to monitor the filtration capacity of the coolant filter device 25 based on the monitoring signals of the eighth pressure sensor 28 and the ninth pressure sensor 29.

[0065] It is understood that the coolant filter device 25 is used to remove impurities from the coolant, preventing impurities from clogging the pipes or damaging the water pump impeller of the coolant pump drive assembly 33 described below. For example, the coolant filter device 25 uses a washable stainless steel filter element. Furthermore, it is understood that the coolant filter device inlet valve 26 and coolant filter device outlet valve 27 work together to open and close the coolant filter device 25, allowing for filter element replacement. That is, when the filter element of the coolant filter device 25 needs to be replaced, the coolant filter device inlet valve 26 and coolant filter device outlet valve 27 are closed to prevent coolant from flowing out during filter element replacement. In addition, the eighth pressure sensor 28 and the ninth pressure sensor 29 together constitute the filter element status monitoring unit of the coolant filter device 25. The eighth pressure sensor 28 can detect the pressure on the inlet side of the inlet valve 26 of the coolant filter device; the ninth pressure sensor 29 can detect the pressure on the outlet side of the outlet valve 27 of the coolant filter device. Based on the detection data of the eighth pressure sensor 28 and the ninth pressure sensor 29, the filtration capacity of the coolant filter device 25 can be determined. When the pressure difference between the pressure detected by the ninth pressure sensor 29 and the pressure detected by the eighth pressure sensor 28 is greater than a set value, an alarm can be issued to remind the user to replace or clean the filter element of the coolant filter device 25.

[0066] In addition, such as Figure 5As shown, in some embodiments, the coolant return main line 3 is equipped with a coolant pump drive assembly 33, a coolant drive pump inlet damping assembly 331, a coolant drive pump outlet damping assembly 332, a coolant return inlet valve 333, a coolant return outlet valve 334, a first check valve 34, and a coolant return pump drive safety overflow device 35. The coolant pump drive assembly 33 provides driving force for the coolant to circulate among the coolant return main line 3, the first heat exchange device 5, the second heat exchange device 6, the coolant inlet main line 2, and the cold plate assembly 1; the coolant drive pump inlet damping assembly 331 and the coolant drive pump outlet damping assembly... 332 is respectively located on the inlet and outlet sides of the coolant pump drive assembly 33; the coolant return inlet valve 333 and the coolant return outlet valve 334 are respectively located on the side away from the coolant pump drive assembly 331 and the coolant drive pump outlet damping assembly 332; the first check valve 34 is located between the coolant return outlet valve 334 and the coolant drive pump outlet damping assembly 332; the coolant return pump drive safety overflow device 35 is used to automatically release pressure when the coolant return main pipeline 3, the first heat exchange device 5, the second heat exchange device 6, the coolant inlet main pipeline 2, and the cold plate assembly 1 are over-pressurized.

[0067] In other words, this embodiment utilizes the coolant pump drive assembly 33 to provide the power required for coolant circulation, including the power for coolant to flow from the second heat exchange device 6 through the coolant inlet main pipe 2 to the cold plate assembly 1, and from the cold plate assembly 1 to the coolant return main pipe 3; the power for coolant to flow from the first coolant return branch 41 into the first heat exchange device 5 and from the first heat exchange device 5 into the second heat exchange device 6; and the power for coolant to flow from the second coolant return branch 42 into the second heat exchange device 6. That is, the entire coolant circulation can be achieved using a single pump drive assembly. The coolant return inlet valve 333 and coolant return outlet valve 334 work together to connect or disconnect the coolant pump drive assembly 33 from the piping of the liquid-cooled server heat dissipation system. When the coolant pump drive assembly 33 requires maintenance, closing the coolant return inlet valve 333 and coolant return outlet valve 334 disconnects it from other piping. This allows for the drainage of coolant from the piping connected to the coolant pump drive assembly 33, enabling maintenance and repair operations without the waste of manpower and resources associated with large-scale drainage, thus reducing maintenance difficulty and costs. Additionally, the coolant drive pump inlet damping assembly 331 and coolant drive pump outlet damping assembly 332 primarily eliminate installation errors when the coolant pump drive assembly 33 is connected to the piping and reduce vibration and impact during operation. The first one-way valve 34 is used to prevent the coolant pump drive assembly 33 from experiencing a decrease in driving force due to the backflow of coolant output through the coolant pump drive assembly 33. The coolant return pump drive safety overflow device 35 is used to automatically release pressure when the coolant return main line 3, the first heat exchange device 5, the second heat exchange device 6, the coolant inlet main line 2, and the cold plate assembly 1 are blocked or otherwise overpressurized, thereby preventing the pipe from bursting or the coolant pump drive assembly 33 from being damaged due to overpressure.

[0068] In addition, such as Figure 5 As shown, in some embodiments, a third flow sensor 36 is provided on the outlet pipe of the cold plate assembly 1, and a fourth flow sensor 37 is provided on the part of the coolant return main pipe 3 located away from the cold plate assembly 1 at the intersection of the outlet pipe of the cold plate assembly 1 and the coolant inlet bypass branch 22 (that is, the confluence pipe of the outlet pipe of the cold plate assembly 1 and the coolant inlet bypass branch 22). The third flow sensor 36 and the fourth flow sensor 37 are respectively connected to the control device of the liquid-cooled server heat dissipation system.

[0069] Understandably, the third flow sensor 36 is used to monitor the flow rate of the coolant flowing through the cold plate assembly 1 and upload its monitoring data to the control device so that the control device can grasp the coolant flow rate information flowing through the cold plate assembly 1 in real time and make relevant adjustments as needed. The fourth flow sensor 37 is used to measure the total flow rate of the coolant flowing through the cold plate assembly 1 and the coolant inlet bypass branch 22 to facilitate system flow management.

[0070] In addition, such as Figure 5 As shown, in some embodiments, the coolant return main line 3 is also provided with a second check valve 38, which is located between the third flow sensor 36 and the fourth flow sensor 37, and is used to prevent coolant backflow from causing inaccurate measurement data of the third flow sensor 36.

[0071] In addition to the liquid-cooled server heat dissipation system described above, the present invention also provides a liquid-cooled server that includes the liquid-cooled server heat dissipation system disclosed in the above embodiments. For the structure of other parts of the liquid-cooled server, please refer to the relevant technology, which will not be repeated here.

[0072] The key point of this embodiment is that the liquid-cooled server adopts the liquid-cooled server heat dissipation system disclosed in any of the above embodiments, so that the liquid-cooled server includes at least the beneficial effects of each of the above liquid-cooled server heat dissipation systems, which will not be repeated here.

[0073] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0074] The liquid-cooled server heat dissipation system and liquid-cooled server provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A liquid-cooled server heat dissipation system, characterized in that, include: Cold plate assembly (1) is used to cool the load; The coolant inlet main pipe (2) is connected to the cold plate assembly (1) and is used to supply coolant to the cold plate assembly (1); The coolant return main pipeline (3) is connected to the cold plate assembly (1) and is used to transport the coolant that has absorbed the load heat flowing out from the cold plate assembly (1); The first branch of coolant return (41) and the second branch of coolant return (42) are connected to the main coolant return pipeline (3) through a flow distribution component (43); The first heat exchange device (5) is connected to the first branch of the coolant return line (41) and is used to cool the coolant in the first branch of the coolant return line (41). The second heat exchange device (6) is connected to the first heat exchange device (5) and the second branch of the coolant return line (42) respectively, and is used to mix the coolant cooled by the first heat exchange device (5) with the coolant in the second branch of the coolant return line (42) to obtain the mixed and cooled coolant. The second heat exchange device (6) is connected to the inlet of the main coolant inlet pipe (2) to supply the mixed and cooled coolant to the main coolant inlet pipe (2).

2. The liquid-cooled server heat dissipation system according to claim 1, characterized in that, The second heat exchange device (6) includes a temperature-controlled liquid storage tank, which is connected to the first heat exchange device (5) and the second branch (42) of the coolant return. The temperature-controlled liquid storage tank is equipped with a refrigerant coil (71), which is connected to the first cold source refrigeration system (7). The first cold source refrigeration system (7) is used to circulate the first refrigerant and deliver the first refrigerant to the refrigerant coil (71).

3. The liquid-cooled server heat dissipation system according to claim 2, characterized in that, The first heat exchange device (5) is a natural refrigeration device.

4. The liquid-cooled server heat dissipation system according to claim 3, characterized in that, The first heat exchange device (5) includes: The air-cooled coil (51) is connected to the first branch of the coolant return line (41) and the second heat exchange device (6), respectively. A fan (52) is provided corresponding to the air-cooled coil (51) to deliver cold air to the air-cooled coil (51).

5. The liquid-cooled server heat dissipation system according to claim 2, characterized in that, Also includes: The coolant return manifold (44) is connected to the outlet of the first heat exchange device (5) and the second coolant return branch (42), and is also connected to the second heat exchange device (6).

6. The liquid-cooled server heat dissipation system according to any one of claims 1-5, characterized in that, The flow distribution component (43) is a flow distribution regulating valve. The flow distribution regulating valve is connected to the control device of the liquid-cooled server heat dissipation system. The control device is used to adjust the opening of the flow distribution regulating valve according to the temperature of the coolant in the second heat exchange device (6). The first branch of the coolant return line (41) is equipped with a first flow sensor (411), and the second branch of the coolant return line (42) is equipped with a second flow sensor (421). The first flow sensor (411) and the second flow sensor (421) are respectively connected to the control device to enable the control device to perform feedback control on the flow distribution regulating valve.

7. The liquid-cooled server heat dissipation system according to any one of claims 1-5, characterized in that, The first branch (41) of the coolant return path is equipped with a first temperature sensor (412) and a first pressure sensor (413). The outlet of the first heat exchange device (5) is connected to a coolant heat exchange return branch (45), and the coolant heat exchange return branch (45) is equipped with a second temperature sensor (451) and a second pressure sensor (452). The first temperature sensor (412), the first pressure sensor (413), the second temperature sensor (451), and the second pressure sensor (452) are respectively connected to the control device of the liquid-cooled server heat dissipation system. The control device is used to monitor the heat exchange effect and operating status of the first heat exchange device (5) based on the monitoring data of the first temperature sensor (412), the first pressure sensor (413), the second temperature sensor (451), and the second pressure sensor (452).

8. The liquid-cooled server heat dissipation system according to any one of claims 2-5, characterized in that, The first cold source refrigeration system (7) includes a refrigeration compressor (72), a refrigeration heat dissipation device (73) and a refrigeration throttling and pressure reducing device (74) connected in sequence. The two ends of the refrigerant coil (71) are respectively connected to the refrigeration compressor (72) and the refrigeration throttling and pressure reducing device (74).

9. The liquid-cooled server heat dissipation system according to claim 8, characterized in that, The pipeline between the refrigeration compressor (72) and the refrigerant coil (71) is equipped with a third temperature sensor (711) and a third pressure sensor (712). The pipeline between the refrigeration compressor (72) and the refrigeration heat dissipation device (73) is equipped with a fourth temperature sensor (721) and a fourth pressure sensor (722). A fifth temperature sensor (731) is provided in the pipeline between the refrigeration and heat dissipation device (73) and the refrigeration throttling and pressure reduction device (74). The pipeline between the refrigeration throttling and pressure reducing device (74) and the refrigerant coil (71) is equipped with a sixth temperature sensor (741) and a fifth pressure sensor (742). The third temperature sensor (711), the third pressure sensor (712), the fourth temperature sensor (721), the fourth pressure sensor (722), the fifth temperature sensor (731), the sixth temperature sensor (741), and the fifth pressure sensor (742) are respectively connected to the control device of the liquid-cooled server heat dissipation system; The control device is used to monitor the operating status of the refrigeration compressor (72) based on the monitoring data of the third temperature sensor (711), the third pressure sensor (712), the fourth temperature sensor (721), and the fourth pressure sensor (722); and to monitor the operating status of the refrigeration heat dissipation device (73) based on the monitoring data of the fifth temperature sensor (731) and the fourth temperature sensor (721); and to monitor the cooling effect of the first cold source refrigeration system (7) based on the monitoring data of the sixth temperature sensor (741), the fifth pressure sensor (742), the third temperature sensor (711), and the third pressure sensor (712).

10. The liquid-cooled server heat dissipation system according to claim 1, characterized in that, The first heat exchange device (5) includes: The refrigerant channel (53) forms a refrigerant circulation loop with the second cold source refrigeration system (8), which is used to supply the second refrigerant for circulation and to deliver the second refrigerant to the refrigerant channel (53); The coolant channel (54) is connected to the first branch of the coolant return channel (41) and the second heat exchange device (6) respectively, so as to allow the coolant to pass through; the coolant channel (54) and the refrigerant channel (53) are arranged in a preset manner so that the second refrigerant can exchange heat with the coolant.

11. The liquid-cooled server heat dissipation system according to any one of claims 1-5 or 10, characterized in that, The outlet of the main coolant inlet pipe (2) is connected to the coolant inlet branch pipe (21) and the coolant inlet bypass branch pipe (22), respectively. The coolant inlet branch pipe (21) is connected to the cold plate assembly (1), and the coolant inlet bypass branch pipe (22) is connected to the main coolant return pipe (3). One of the coolant inlet bypass branch pipe (22) and the coolant inlet branch pipe (21) is provided with a coolant flow regulating device (221).

12. The liquid-cooled server heat dissipation system according to claim 11, characterized in that, The coolant inlet branch (21) is equipped with a seventh temperature sensor (211) and a sixth pressure sensor (212). The pipeline between the connection point of the coolant return main pipeline (3) and the coolant inlet bypass branch (22) and the cold plate assembly (1) is equipped with an eighth temperature sensor (31) and a seventh pressure sensor (32). The seventh temperature sensor (211), the sixth pressure sensor (212), the eighth temperature sensor (31), and the seventh pressure sensor (32) are respectively connected to the control device of the liquid-cooled server heat dissipation system. The control device is used to monitor the heat exchange effect and operating status of the cold plate assembly (1) based on the monitoring data of the seventh temperature sensor (211), the sixth pressure sensor (212), the eighth temperature sensor (31), and the seventh pressure sensor (32).

13. The liquid-cooled server heat dissipation system according to claim 11, characterized in that, The coolant inlet main pipe (2) is equipped with: Coolant sterilization device (23), used to sterilize microorganisms and bacteria in coolant; and / or, A coolant visualization monitoring device (24) is used to monitor the coolant circulation status; and / or, Coolant filtration device (25) and coolant filtration device inlet valve (26) and coolant filtration device outlet valve (27) respectively located on both sides of coolant filtration device (25). The eighth pressure sensor (28) is located on the inlet side of the inlet valve (26) of the coolant filter device; The ninth pressure sensor (29) is located on the outlet side of the outlet valve (27) of the coolant filter device; The eighth pressure sensor (28) and the ninth pressure sensor (29) are respectively connected to the control device of the liquid cooling server heat dissipation system. The control device is used to monitor the filtration capacity of the coolant filtration device (25) according to the monitoring signals of the eighth pressure sensor (28) and the ninth pressure sensor (29).

14. The liquid-cooled server heat dissipation system according to claim 11, characterized in that, The coolant return main pipeline (3) is equipped with: The coolant pump drive assembly (33) is used to provide driving force for the coolant to circulate among the coolant return main line (3), the first heat exchange device (5), the second heat exchange device (6), the coolant inlet main line (2) and the cold plate assembly (1); The coolant drive pump inlet damping assembly (331) and the coolant drive pump outlet damping assembly (332) are respectively provided on the inlet side and outlet side of the coolant pump drive assembly (33); The coolant return inlet valve (333) and the coolant return outlet valve (334) are respectively located on the side of the coolant drive pump inlet damping assembly (331) and the coolant drive pump outlet damping assembly (332) away from the coolant pump drive assembly (33).

15. A liquid-cooled server, characterized in that, Includes the liquid-cooled server heat dissipation system according to any one of claims 1-14.

Images