Flow regulation and control system of immersion liquid cooling device

Abstract

The utility model relates to a flow regulation and control system of an immersion liquid cooling device. The flow regulation and control system comprises an immersion cabinet and a flow distribution device, the immersion cabinet is filled with cooling liquid, a plurality of servers are immersed in the cooling liquid, and each server is provided with a temperature detection unit. The temperature detection unit detects the liquid inlet temperature and the liquid outlet temperature of the corresponding server and the temperature of at least one high-heat element in the server, the flow regulation and control system is provided with a throttling valve corresponding to each server, and the flow distribution device is connected with the temperature detection unit and the throttling valve. And the flow distribution device is configured to control the opening degree of the throttle valve according to temperature data measured by the temperature detection unit so as to distribute the flow of the cooling liquid flowing to each server. According to the flow regulation and control system of the immersion liquid cooling device, the multiple servers in the immersion cabinet can be subjected to balanced heat dissipation, and the heat dissipation stability of the immersion liquid cooling device is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of immersion liquid cooling and heat dissipation, and in particular to a flow control system for an immersion liquid cooling device. Background Art

[0002] As server computing power increases, server heat generation also increases dramatically, which places higher demands on server heat dissipation. Traditional air cooling can no longer meet high-intensity heat dissipation requirements, while liquid cooling has been widely used in server heat dissipation due to its high heat dissipation efficiency.

[0003] At present, immersion liquid cooling has been applied to scenarios with high heat dissipation requirements such as servers. The server is immersed in an immersion cabinet (also known as a tank in the industry) filled with an insulating cooling medium in whole or in part to directly exchange heat with the insulating cooling medium to achieve heat dissipation. In order to ensure that the temperature of each server in the tank is balanced and does not overheat, the industry usually adjusts the flow rate of the water pump in the CDU (Coolant Distribution Unit) according to the inlet and outlet liquid temperatures to change the inlet and outlet liquid flow rates to ensure that the overall inlet and outlet liquid temperatures of the tank are maintained at an appropriate level; at the same time, different sized outlets are opened at different positions on the inlet pipe wall of the tank to distribute the flow that matches the server flow.

[0004] However, since the Tank needs to be compatible with servers of different types and sizes, the flow resistance of the servers themselves is different. At the same time, the heat generation and cooling requirements of the servers themselves (the requirements for liquid flow) are also different. This method of fixing the size of the liquid outlet opening in advance cannot provide matching flow for servers with different cooling requirements in actual applications. This may cause unbalanced cooling of servers in different positions in the entire cabinet, large differences in temperature, and large deviations in performance. In extreme cases, local hotspots will appear, causing over-temperature damage to the server.

[0005] In view of this, it is necessary to propose a new technical solution to overcome the shortcomings of the existing technology. Utility Model Content

[0006] Based on this, the present application provides a flow control system for an immersion liquid cooling device, which can evenly dissipate heat for multiple servers in an immersion cabinet and ensure the stability of heat dissipation of the immersion liquid cooling device.

[0007] To this end, the present application adopts the following technical solution: a flow control system for an immersion liquid cooling device, comprising an immersion cabinet and a flow distribution device, the immersion cabinet is filled with coolant, a plurality of servers are immersed in the coolant, each server is provided with a temperature detection unit, the temperature detection unit detects the liquid inlet temperature, liquid outlet temperature and the temperature of at least one high-temperature element in the server corresponding to the server, the flow control system is provided with a throttle valve corresponding to each server, the flow distribution device is connected to the temperature detection unit and the throttle valve, and the flow distribution device is configured to control the opening of the throttle valve according to the temperature data measured by the temperature detection unit to distribute the flow of coolant flowing to each server.

[0008] In one of the embodiments, the flow distribution device includes a PID opening adjustment module, and the opening of the throttle valve is controlled by the PID opening adjustment module through a PID algorithm.

[0009] In one of the embodiments, the flow control system also includes a diverter valve configured corresponding to each server, and the diverter valve is connected to the throttle valve to divert the liquid flow provided by the throttle valve into a whole-machine heat dissipation flow and a local heat dissipation flow, wherein the whole-machine heat dissipation flow flows through the entire server, and the local heat dissipation flow flows toward the high-heat components in the server.

[0010] In one embodiment, the high heat component is at least one of a CPU and a GPU.

[0011] In one of the embodiments, the diverter valve is configured with an adjustable opening.

[0012] In one of the embodiments, a main liquid inlet and an immersion branch corresponding to each server are provided in the immersion cabinet, the throttle valve is connected to the main liquid inlet, the diverter valve is connected to the throttle valve and the immersion branch, a nozzle is provided on the immersion branch, and the local heat dissipation flow is sprayed toward the high-heat element through the nozzle.

[0013] In one of the embodiments, the spray head sprays the liquid flow obliquely upward.

[0014] In one embodiment, the flow distribution device includes a temperature comparison module, which is configured to calculate the difference between the liquid outlet temperature of the server and the temperature of the high-temperature element of the server, and the flow distribution device controls the diverter valve according to the temperature difference.

[0015] In one embodiment, the server has a shell, a liquid inlet is formed at the lower end of the shell, and a liquid outlet is formed at the upper end of the shell, and a temperature detection unit is arranged near the liquid inlet and the liquid outlet to detect the liquid inlet temperature and the liquid outlet temperature.

[0016] In one embodiment, a plurality of partitions are provided in the immersion cabinet to separate the servers from each other, and a liquid flow channel is formed between adjacent partitions. A temperature detection unit is provided near the lower end and the upper end of the liquid flow channel to detect the liquid inlet temperature and the liquid outlet temperature.

[0017] Compared with the prior art, the flow control system of the immersion liquid cooling device provided in the present application is equipped with a throttle valve corresponding to each server, and the flow distribution device is connected to the temperature detection unit and the throttle valve, and is used to control the opening of the throttle valve according to the temperature data measured by the temperature detection unit to distribute the flow of coolant flowing to each server. It can evenly dissipate heat for multiple servers in the immersion cabinet, ensure the stability of the heat dissipation performance of the immersion liquid cooling device, and improve the reliability and life of the servers cooled by it. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of an embodiment of a flow control system for an immersion liquid cooling device provided in the present application.

[0020] Figure 2 A schematic diagram of another embodiment of the flow control system of the immersion liquid cooling device provided in the present application.

[0021] The reference numerals of the components are as follows:

[0022] 1. Immersion cabinet; 10. Server; 11. 1U server; 111. Motherboard; 112. High-heat component; 113. Radiator; 12. 2U server; 13. Main liquid inlet; 14. Throttle valve; 15. Diverter valve; 16. Immersion branch; 17. Nozzle; 2. Flow distribution device; 21. Temperature management unit. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0028] See also Figure 1As shown, the present application provides a flow control system for an immersion liquid cooling device. In one embodiment, the flow control system for the immersion liquid cooling device includes an immersion cabinet 1 and a flow distribution device 2, the immersion cabinet 1 is filled with cooling liquid, a plurality of servers 10 are immersed in the cooling liquid, each server 10 is configured with a temperature detection unit, the temperature detection unit detects the liquid inlet temperature, liquid outlet temperature and the temperature of at least one high-temperature element 112 in the server 10 corresponding to the server 10. The flow control system is configured with a throttle valve 14 corresponding to each server 10, the flow distribution device 2 is connected to the temperature detection unit and the throttle valve 14, and the flow distribution device 2 is configured to control the opening of the throttle valve 14 according to the temperature data measured by the temperature detection unit, so as to distribute the flow of cooling liquid flowing to each server 10.

[0029] The flow control system of the immersion liquid cooling device provided in the present application is equipped with a throttle valve 14 corresponding to each server 10. The flow distribution device 2 is connected to the temperature detection unit and the throttle valve 14, and is used to control the opening of the throttle valve 14 according to the temperature data measured by the temperature detection unit to distribute the flow of the cooling liquid flowing to each server 10. It can evenly dissipate heat for multiple servers 10 in the immersion cabinet 1, ensure the stability of the heat dissipation performance of the immersion liquid cooling device, and improve the reliability and life of the server 10 cooled by it.

[0030] like Figure 1 As shown, in this embodiment, the server 10 includes a 1U server 11 and a 2U server 12. Of course, it may also include other servers of different types and sizes. In this embodiment, each throttle valve 14 is the same, and a throttle valve 14 corresponding to the 1U server 11 is configured, and two throttle valves 14 corresponding to the 2U server 12 are configured. Of course, in other embodiments, different types of throttle valves 14 may be used for servers 10 of different types and sizes. In short, it is sufficient to match the flow provided by the throttle valve 14 with the heat dissipation requirements of the corresponding server 10.

[0031] In this embodiment, a temperature detection unit (not shown in the figure) is provided at the liquid inlet and liquid outlet of each server 10, and the temperature detection unit is, for example, a temperature sensor. The liquid inlet of the server 10 is the end connected to the liquid inlet main path 13 through the throttle valve 14, and the liquid outlet of the server 10 is the end opposite to the liquid inlet. In this embodiment, the liquid inlet is the lower end of the server 10, and the liquid outlet is the upper end of the server 10. The temperature detection unit also includes a temperature sensor for detecting the temperature of at least one high-temperature element 112 in the server 10. The temperature data detected by the temperature detection unit is transmitted to the temperature management unit 21 in the flow distribution device 2. The temperature management unit can determine the heat dissipation condition of the server 10 based on the liquid inlet temperature and liquid outlet temperature detected by the temperature detection unit, and control the opening of the throttle valve 14 to adjust the flow in time so that the flow matches the heat dissipation condition of the server 10.

[0032] In one embodiment, each server 10 has a shell, a liquid inlet is provided at the lower end of the shell, and a liquid outlet is provided at the upper end, and a temperature detection unit is disposed near the liquid inlet and the liquid outlet to detect the liquid inlet temperature and the liquid outlet temperature. In another embodiment, a plurality of partitions are disposed in the immersion cabinet 1 to separate the servers 10 from each other, and a liquid flow channel is formed between the partitions, and a temperature detection unit is disposed near the lower end and the upper end of the liquid flow channel to detect the liquid inlet temperature and the liquid outlet temperature.

[0033] In one embodiment, the flow distribution device includes a PID opening adjustment module, and the opening of the throttle valve 14 is controlled by the PID opening adjustment module through a PID algorithm. The PID algorithm control is adopted, and its regulation is precise.

[0034] See also Figure 2As shown, it is a further improved embodiment. In this embodiment, the flow control system also includes a diverter valve 15 configured for each server 10, and the diverter valve 15 is connected to the throttle valve 14 to divert the liquid flow provided by the throttle valve 14 into a whole machine heat dissipation flow F1 and a local heat dissipation flow F2. The whole machine heat dissipation flow F1 flows through the server 10 as a whole, and the local heat dissipation flow F2 flows toward the high heat element 112 in the server 10. This embodiment can better dissipate heat for local high heat areas by further diverting the whole machine heat dissipation flow F1 and the local heat dissipation flow F2. It should be noted that the high heat element 112 refers to an element with a large heat output. The high heat here is a relative concept rather than an insulation concept. It should be understood that the element is an element with a large heat output and usually requires targeted heat dissipation. In one embodiment, the high heat element 112 is, for example, at least one of a CPU and a GPU, which is installed on a motherboard 111 and is provided with a radiator 113. In order to achieve adjustable flow rates of the whole machine heat dissipation flow F1 and the local heat dissipation flow F2, in this embodiment, the diverter valve 15 is configured with an adjustable opening, for example, a three-way electronic throttle valve is used.

[0035] Please combine Figure 1 and Figure 2 As shown, in one embodiment, the immersion cabinet 1 is provided with a main liquid inlet 13 and an immersion branch 16 corresponding to each server 10, the throttle valve 14 is connected to the main liquid inlet 13, the diverter valve 15 is connected to the throttle valve 14 and the immersion branch 16, and a nozzle 17 is provided on the immersion branch 16, and the local heat dissipation flow F2 is sprayed toward the high-heat element 112 through the nozzle 17. In this embodiment, the nozzle 17 sprays the liquid flow upward at an angle, which is conducive to strengthening the circulation of the coolant. The local heat dissipation flow F2 is transported through the immersion branch 16, so that the coolant with a lower temperature can be directly transported to the high-heat element 112, which is more rapid than the coolant passing through the entire server 10 from bottom to top; and the spraying through the nozzle 17 is conducive to strengthening the local flow, thereby driving the overall flow of the coolant to accelerate, which is also conducive to the overall heat dissipation of the server 10. In particular, when it is detected that the temperature at the high-heat element 112 is significantly different from the outlet temperature of the liquid when it flows out of the server 10, it indicates that the high-heat element 112 is locally overheated and heat dissipation is unbalanced. At this time, by regulating the diverter valve 15 to increase the flow of the local heat dissipation flow F2 and reduce the flow of the whole machine heat dissipation flow F1, the local overheating phenomenon can be quickly alleviated. In this embodiment, the flow distribution device 2 also includes a temperature comparison module, which is configured to calculate the difference between the outlet temperature of the server 10 and the temperature of the high-heat element 112 of the server 10, and the flow distribution device 2 controls the diverter valve 15 based on the temperature difference. In one embodiment, the opening of the diverter valve 15 can be controlled by a PID algorithm.

[0036] The present application also provides a flow control method for an immersion liquid cooling device, which is used to control the flow of cooling liquid in the immersion liquid cooling device. The immersion liquid cooling device includes an immersion cabinet 1 filled with cooling liquid, and multiple servers 10 are immersed in the cooling liquid. A throttle valve 14 is configured corresponding to each server 10; the control method includes: detecting the inlet temperature, outlet temperature and temperature of at least one high-temperature element 112 in each server 10; and controlling the opening of the throttle valve 14 according to the temperature data obtained by the detection to distribute the flow of cooling liquid flowing to each server 10.

[0037] In one embodiment, the control method includes: when it is detected that the difference between the outlet temperature and the inlet temperature of a server 10 is greater than a first preset value, increasing the opening of the throttle valve 14 corresponding to the server 10. When the difference between the outlet temperature and the inlet temperature of the server 10 is large, it indicates that the server 10 has a large heat dissipation demand, and the current coolant flow is insufficient to meet the heat dissipation demand, so by increasing the opening of the throttle valve 14 corresponding to the server 10, the flow is increased to improve its heat dissipation capacity. In this way, the problem of uneven heat dissipation between different servers 10 is solved.

[0038] In one embodiment, a diverter valve 15 is configured in the immersion cabinet 1 for each server 10, and the diverter valve 15 is connected to the throttle valve 14 to divert the liquid flow provided by the throttle valve 14 into a whole-machine heat dissipation flow F1 and a local heat dissipation flow F2, wherein the whole-machine heat dissipation flow F1 flows through the whole server 10, and the local heat dissipation flow F2 flows toward the high-heat element 112 in the server 10; the control method includes: when it is detected that the difference between the temperature at the high-heat element 112 and the outlet temperature of the liquid when it flows out of the server 10 is greater than a second preset value, the diverter valve 15 is controlled to increase the flow of the local heat dissipation flow F2 and reduce the flow of the whole-machine heat dissipation flow F1. In this way, the problem of uneven local heat dissipation inside the same server 10 is solved.

[0039] It can be seen from the above description of multiple specific embodiments that, compared with the prior art, the flow control system of the immersion liquid cooling device provided in the present application is configured with a throttle valve 14 corresponding to each server 10, and the flow distribution device 2 is connected to the temperature detection unit and the throttle valve 14, and is used to control the opening of the throttle valve 14 according to the temperature data measured by the temperature detection unit to distribute the flow of cooling liquid flowing to each server 10. It can evenly dissipate heat for multiple servers 10 in the immersion cabinet 1, ensure the stability of the heat dissipation performance of the immersion liquid cooling device, and improve the reliability and life of the server 10 dissipated by it.

[0040] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A flow control system for an immersion liquid cooling device, characterized in that: The invention comprises an immersion cabinet and a flow distribution device, wherein the immersion cabinet is filled with cooling liquid, a plurality of servers are immersed in the cooling liquid, each server is provided with a temperature detection unit, the temperature detection unit detects the liquid inlet temperature, liquid outlet temperature and the temperature of at least one high-heat element in the server corresponding to the server, the flow control system is provided with a throttle valve corresponding to each server, the flow distribution device is connected with the temperature detection unit and the throttle valve, and the flow distribution device is configured to control the opening of the throttle valve according to the temperature data measured by the temperature detection unit so as to distribute the flow of cooling liquid flowing to each server.

2. The flow control system of the immersion liquid cooling device according to claim 1, characterized in that: The flow distribution device comprises a PID opening adjustment module, and the opening of the throttle valve is controlled by the PID opening adjustment module through a PID algorithm.

3. The flow control system of the immersion liquid cooling device according to claim 1, characterized in that: The flow control system also includes a diverter valve configured corresponding to each server, and the diverter valve is connected to the throttle valve to divert the liquid flow provided by the throttle valve into a whole-machine heat dissipation flow and a local heat dissipation flow. The whole-machine heat dissipation flow flows through the entire server, and the local heat dissipation flow flows toward the high-heat components in the server.

4. The flow control system of the immersion liquid cooling device according to claim 1 or 3, characterized in that: The high-heat component is at least one of a CPU and a GPU.

5. The flow control system of the immersion liquid cooling device according to claim 3, characterized in that: The diverter valve is adjustable in opening.

6. The flow control system of the immersion liquid cooling device according to claim 3, characterized in that: The immersion cabinet is provided with a main liquid inlet and an immersion branch corresponding to each server, the throttle valve is connected to the main liquid inlet, the diverter valve is connected to the throttle valve and the immersion branch, a nozzle is provided on the immersion branch, and the local heat dissipation flow is sprayed toward the high-heat element through the nozzle.

7. The flow control system of the immersion liquid cooling device according to claim 6, characterized in that: The spray head sprays the liquid flow obliquely upward.

8. The flow control system of the immersion liquid cooling device according to claim 3, characterized in that: The flow distribution device comprises a temperature comparison module, which is configured to calculate the difference between the outlet temperature of the server and the temperature of the high-heat element of the server, and the flow distribution device controls the diverter valve according to the temperature difference.

9. The flow control system of the immersion liquid cooling device according to claim 1 or 3, characterized in that: The server has a shell, a liquid inlet is provided at the lower end of the shell, a liquid outlet is provided at the upper end of the shell, and a temperature detection unit is arranged near the liquid inlet and the liquid outlet to detect the liquid inlet temperature and the liquid outlet temperature.

10. The flow control system of the immersion liquid cooling device according to claim 1 or 3, characterized in that: The immersion cabinet is provided with a plurality of partitions for separating the servers from each other, and a liquid flow channel is formed between adjacent partitions. The temperature detection unit is arranged near the lower end and the upper end of the liquid flow channel to detect the liquid inlet temperature and the liquid outlet temperature.

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