Coolant Flow Dynamic Regulation Device and Single-Phase Immersion Liquid Cooling Control System

Abstract

The present invention provides a device for dynamically regulating the coolant flow rate and a single-phase immersion liquid cooling control system, belonging to the technical field of liquid-cooled servers, aiming to dynamically regulate the coolant flow rate flowing to the server nodes based on temperature changes by setting self-balancing regulation; the device includes: an immersion heat exchange cavity and a plurality of liquid distribution branch pipes; a plurality of server nodes are arranged in the immersion heat exchange cavity; wherein, each liquid distribution branch pipe is connected to a server node in the immersion heat exchange cavity through its respective self-balancing regulator; the self-balancing regulator includes: a lever adjustment actuator, a lever member, and a temperature sensing component; the lever adjustment actuator is connected to the temperature sensing component through the lever member; wherein, the temperature sensing component is connected to the server node and is configured to adjust the inclination of the lever member based on the temperature change of the server node, and the lever adjustment actuator is configured to change the coolant flow rate flowing to the server node in the liquid distribution branch pipe when the inclination of the lever member changes.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling servers, and in particular to a cooling liquid flow dynamic regulating device and a single-phase immersion liquid cooling control system. Background Art

[0002] The mainstream server liquid cooling methods mainly include cold plate liquid cooling and immersion liquid cooling. Among them, immersion liquid cooling is to directly immerse the server (node) in insulating coolant, relying on the circulation of coolant to remove the heat generated by the server operation. Compared with cold plate liquid cooling, it has lower noise and is more energy-efficient.

[0003] The commonly used immersion liquid cooling method is to allocate the flow of each node according to the node with the highest power consumption. However, this will cause the power consumption of the circulation pump to remain high, forming a similar effect to the short board of the barrel. That is, as long as one of the 54 nodes in a single immersion chamber runs at high power consumption, the flow must be supplied at the maximum flow to meet its heat dissipation needs, which is contrary to green energy saving. When one node has high power consumption and one node has ultra-low power consumption, the temperature of the ultra-low power node will deviate significantly from the target temperature. When the chip specifications have a temperature control range, there is a risk of temperature control failure. Summary of the invention

[0004] In view of this, the present invention aims to propose a coolant flow dynamic adjustment device and a single-phase immersion liquid cooling control system to solve the problem that the currently used immersion liquid cooling heat dissipation method will cause the node temperature to deviate from the target temperature and there will be a risk of temperature control failure.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A coolant flow dynamic regulating device, comprising:

[0007] Immersed heat exchange chamber and multiple liquid distribution branches;

[0008] Each of the liquid branch pipes is connected to a server node in the immersion heat exchange cavity through a corresponding self-balancing regulator to cool the server node;

[0009] The lever member comprises: a lever adjustment actuator, a lever member and a temperature sensing component; the lever adjustment actuator is connected to the temperature sensing component through the lever member;

[0010] Wherein, the temperature sensing component is connected to the server node and is configured to adjust the inclination of the lever member based on the temperature change of the server node. The lever adjustment actuator is configured to change the coolant flow rate flowing into the server node in the liquid distribution branch pipe when the inclination of the lever member changes; the coolant in the liquid distribution branch pipe flows out of the immersion heat exchange cavity.

[0011] Further, the lever member includes a first lever member, a second lever member and a fulcrum. The first lever member is connected to the lever adjustment actuator, the second lever member is connected to the temperature sensing component, the fulcrum is fixed to the inner wall of the immersion heat exchange cavity, and the first lever member and the second lever member are respectively arranged on both sides of the fulcrum and are connected through the fulcrum; wherein, the first lever member and the second lever member are made of non-linear expansion materials.

[0012] Further, the temperature sensing component is made of a linear expansion material and is arranged perpendicular to the server node; the temperature sensing component is configured to displace in the vertical direction based on the temperature change of the server node so as to tilt the lever member.

[0013] Further, the temperature sensing component is arranged perpendicular to the first lever member so that the temperature sensing component drives the first lever member to displace in the vertical direction.

[0014] Further, the lever adjustment actuator includes a movable gate plate. The gate plate is arranged on one side of the liquid distribution branch pipe close to the server node and is configured to change the size of the opening communicating between the liquid distribution branch pipe and the server node when moving up and down so as to change the coolant flow rate entering the server node.

[0015] Further, the movable gate plate is perpendicularly connected to the second lever member in the lever member so that the second lever member drives the movable gate plate to displace in the vertical direction.

[0016] Further, the movable gate plate is a convex, square or double-wedge gate plate.

[0017] Another object of the present invention is to propose a single-phase immersion liquid cooling control system to solve the problem that the currently adopted immersion liquid cooling heat dissipation method may cause the node temperature to deviate from the target temperature and there is a risk of temperature control failure.

[0018] To achieve the above object, the technical solution of the present invention is realized as follows:

[0019] A single-phase immersion liquid cooling control system includes:

[0020] The above-mentioned coolant flow dynamic regulation device, the first circulation pump, the data acquisition module, and the control module,

[0021] wherein, the first circulation pump and the coolant flow dynamic regulation device form a cooling loop for dissipating heat from a plurality of server nodes in the immersion heat exchange cavity in the coolant flow dynamic regulation device;

[0022] The data acquisition module is connected to the immersion heat exchange cavity, and the data acquisition module is used to collect the total power consumption of a plurality of server nodes in the immersion heat exchange cavity;

[0023] The control module is connected to the first circulation pump, and the control module is used to control the rotation speed of the circulation pump according to the total power consumption to control the total flow rate of the coolant flowing into the coolant flow dynamic regulation device.

[0024] Further, the control system further includes:

[0025] A flow equalizing distributor, which is arranged between the first circulation pump and a plurality of the liquid distribution branch pipes, and is used to evenly distribute the coolant to each of the liquid distribution branch pipes;

[0026] A liquid collector, which is arranged after the immersion heat exchange cavity and is used to collect the coolant for heat dissipation.

[0027] Further, the control system further includes:

[0028] A heat dissipation loop, which includes a second circulation pump, a heat dissipation end, and a heat exchanger arranged in sequence, and the heat dissipation loop is used to dissipate heat from the coolant; wherein, the heat exchanger is also located in the cooling loop and is arranged between the coolant flow dynamic regulation device and the first circulation pump.

[0029] Compared with the prior art, the coolant flow dynamic regulation device of the present invention has the following advantages:

[0030] The coolant flow dynamic regulation device described in the present invention includes: a submerged heat exchange cavity and a plurality of liquid distribution branch pipes; a plurality of server nodes are arranged in the submerged heat exchange cavity; wherein, each liquid distribution branch pipe is connected to one of the server nodes in the submerged heat exchange cavity through a respective self-balancing regulator to cool the server node; the self-balancing regulator includes: a lever regulation actuator, a lever member, and a temperature sensing component; the lever regulation actuator is connected to the temperature sensing component through the lever member; wherein, the temperature sensing component is connected to the server node and is configured to adjust the inclination of the lever member based on the temperature change of the server node, and the lever regulation actuator is configured to change the coolant flow rate flowing into the server node in the liquid distribution branch pipe when the inclination of the lever member changes; the coolant of the liquid distribution branch pipe flows out of the submerged heat exchange cavity; thus, in the present invention, the temperature sensing component in the self-balancing regulator senses the temperature change of the server node to drive the lever member to tilt, and then the lever member drives the lever regulation actuator to adjust the coolant flow rate in the liquid distribution branch pipe, thereby realizing the adjustment of the actuator through the temperature change and further adjusting the coolant flow rate. Therefore, the temperature of each server node is controlled within a certain temperature range, avoiding the high power consumption of the overall liquid cooling heat dissipation caused by the high power consumption operation of a single node and reducing the risk of temperature control failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 The structural schematic diagram of the coolant flow dynamic regulation device provided by the embodiment of the present invention is shown;

[0033] Figure 2 The structural schematic diagram of the self-balancing regulator provided by the embodiment of the present invention is shown;

[0034] Figure 3 The structural schematic diagram of the circular lever regulation actuator provided by the embodiment of the present invention is shown;

[0035] Figure 4 The structural schematic diagram of the square lever regulation actuator provided by the embodiment of the present invention is shown;

[0036] Figure 5 The structural schematic diagram of another square lever regulator provided by the embodiment of the present invention is shown;

[0037] Figure 6 The structural schematic diagram of the single-phase submerged liquid cooling control system provided by the embodiment of the present invention is shown;

[0038] Reference numerals: 100, dynamic coolant flow regulating device; 101, self-balancing regulator; 1011, lever regulating actuator; 10111, valve body; 10112, movable shutter; 10113, connecting rod; 1012, lever member; 10121, first lever member; 10122, second lever member; 10123, fulcrum; 1013, temperature sensing component; 102, liquid distribution branch pipe; 103, immersion heat exchange cavity; 200, first circulation pump; 300, data acquisition module; 400, control module; 500, flow equalizing liquid distributor; 600, liquid collector; 700, regulating valve; 800, heat dissipation loop; 801, second circulation pump; 802, heat dissipation end; 803, heat exchanger. Detailed implementation manners

[0039] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0040] In the related art, the mainstream liquid cooling and heat dissipation methods mainly include cold plate liquid cooling and immersion liquid cooling. Immersion liquid cooling is to directly immerse the server (node) in the insulating coolant, and rely on the circulating flow of the coolant to take away the heat generated by the server operation. Compared with cold plate liquid cooling, it has lower noise and is more energy-efficient.

[0041] The commonly used single-phase immersion liquid cooling cabinet currently has an immersion cavity with a length * width * height of about 2600mm * 1000mm * 1300mm. The liquid flows in from the uniform flow plate at the bottom on one side in the length direction, flows through the vertically arranged liquid-cooled servers in parallel, takes away the heat, and then overflows and flows out from the top on the other side in the length direction. In this way, equal flow distribution of each node under the design condition, that is, when the nodes are fully loaded, can be achieved.

[0042] However, since the power consumption actually consumed by each server node is different, the required coolant flow is also different. If the above method is used for liquid cooling and heat dissipation, it will cause the power consumption of the circulation pump to remain high, forming a similar cask effect. For example, if there is a high-power running node among multiple nodes inside a single immersion cavity, then in order to prevent this node from overheating, it is necessary to dissipate heat according to the condition that this node reaches the normal operating temperature, resulting in an increase in unnecessary coolant consumption. This will obviously cause waste of resources and reduce the recycling times of the coolant. Moreover, if there are nodes with low power consumption or nodes that are not working at all, due to the addition of excessive coolant, the temperature of the low-power nodes may be too low, possibly lower than the normal operating temperature, and thus there is a risk of temperature control failure.

[0043] In view of this, the present invention provides a device for dynamically adjusting the coolant flow rate and a single-phase immersion liquid cooling control system. By adopting a distributed method, multiple server nodes are connected in parallel. The temperature change of each server node is fed back to a self-balancing regulator arranged on the corresponding liquid distribution branch pipe of the server node through a temperature sensing component. Then, the opening degree of each liquid distribution branch pipe is adjusted through the self-balancing regulator, so as to achieve the effect of dynamically regulating the coolant of each server node. Thus, the temperature of each server node can be controlled within a certain range, avoiding the occurrence of the situation where the temperature control of the server node fails.

[0044] The following will refer to the accompanying drawings and combine with embodiments to detail a device for dynamically adjusting the coolant flow rate and a single-phase immersion liquid cooling control system of the present invention.

[0045] Embodiment 1

[0046] Referring to Figure 1 , Figure 1 shows a structural schematic diagram of a device for dynamically adjusting the coolant flow rate provided by an embodiment of the present invention. As Figure 1 shown, the device 100 includes:

[0047] An immersion heat exchange cavity 103 and multiple liquid distribution branch pipes 102; multiple server nodes are arranged in the immersion heat exchange cavity 103;

[0048] Among them, each liquid distribution branch pipe 102 is connected to one of the server nodes in the immersion heat exchange cavity 103 through its corresponding self-balancing regulator 101 to cool the server node.

[0049] Combined with Figures 1-3 , the self-balancing regulator 101 includes a lever adjustment actuator 1011, a lever member 1012, and a temperature sensing component 1013. The lever adjustment actuator 1011 is connected to the temperature sensing component 1013 through the lever member 1012;

[0050] Among them, the temperature sensing component 1013 is connected to the server node, and is configured to adjust the inclination of the lever member 1012 based on the temperature change of the server node. The lever adjustment actuator 1011 is configured to change the coolant flow rate flowing to the server node in the liquid distribution branch pipe 102 when the inclination of the lever member 1012 changes; the coolant of the liquid distribution branch pipe 102 flows out of the immersion heat exchange cavity 103.

[0051] Specifically, the temperature sensing component 1013 will linearly expand or contract according to the temperature change of the server node. Since the temperature sensing component 1013 is connected to the lever component 1012, the expansion and contraction of the temperature sensing component 1013 will cause the connected lever component 1012 to tilt. When the lever component 1012 tilts, the lever adjustment actuator 1011 will change the coolant flow rate flowing to the server node in the liquid distribution branch pipe 102 according to the tilt degree of the lever component 1012.

[0052] In the embodiment of the present invention, a distributed immersion heat exchange cavity 103 is adopted. By arranging multiple server nodes in parallel in the immersion heat exchange cavity 103, each server node's immersion cavity is connected to a liquid distribution branch pipe 102 to achieve the purpose of cooling multiple server nodes. Among the server nodes of the liquid-cooled server, there are high-power consumption nodes that need to run for a long time, and there are also low-power consumption nodes that are rarely used. Therefore, in a preferred implementation manner, the high-power consumption nodes and low-power consumption nodes can be classified when configuring the immersion heat exchange cavity; for the low-power consumption nodes, a series connection or arrangement in the same immersion cavity is adopted, and for the high-power consumption nodes, a distributed arrangement is adopted, different server nodes are arranged in different immersion cavities, and a liquid distribution branch pipe is arranged for each immersion cavity, and the complexity of the immersion heat exchange cavity is reduced, and it is ensured that the high-power consumption nodes can operate within a certain temperature range.

[0053] Among them, the lever component 1012 includes a first lever component 10121, a second lever component 10122, and a fulcrum 123. The first lever component 10121 is connected to the lever adjustment actuator 1011, the second lever component 10122 is connected to the temperature sensing component 1013, the fulcrum 10123 is fixed to the inner wall of the immersion heat exchange cavity 103, and the first lever component and the second lever component are respectively arranged on both sides of the fulcrum and are connected through the fulcrum. Thus, the inner wall of the immersion heat exchange cavity 103 is used as the fulcrum of the lever structure, and the first lever component 10121 and the second lever component 10122 are respectively arranged on both sides. Therefore, the temperature change inside the immersion heat exchange cavity 1013 can be transmitted to the lever adjustment actuator 1011 outside the immersion heat exchange cavity through the second lever component 10122 by the lever structure, and then the lever adjustment actuator 1011 changes the coolant flow rate flowing to the server node in the liquid distribution branch pipe 102.

[0054] In the embodiment of the present invention, the structure of the lever adjustment actuator 1011 is as Figure 3As shown, the lever adjustment actuator 1011 can move the movable shutter 10112. The shutter 10112 is arranged on one side of the liquid distribution branch pipe close to the server node and is configured to change the size of the opening communicating between the liquid distribution branch pipe 102 and the server node when moving up and down, so as to change the coolant flow rate entering the server node. Since the movable shutter 10111 is vertically connected to the first lever member 10121 in the lever member 1012, when the first lever member 10121 has a vertical displacement due to the overall inclination of the lever member 1012, it drives the movable shutter 10112 to have a vertical displacement, thereby changing the size of the flow channel at the movable shutter, and further changing the size of the opening communicating between the liquid distribution branch pipe 102 and the server node. Due to the change in size, the coolant flow rate entering the server node changes. Thus, the first lever member 10121 can drive the movable shutter 10112 to move up and down to adjust the coolant flow rate passing through the liquid distribution branch pipe.

[0055] In some embodiments, the lever adjustment actuator 1011 can be configured as the structure of a valve. The valve is composed of a valve body 10111 and a movable shutter 10112. The cavity of the valve body 10111 and the movable shutter 10112 form a coolant flow channel, and the size of the flow channel is adjusted by the movable shutter 10112, so as to adjust the size of the coolant flow rate through the valve structure of the lever adjustment actuator 1011.

[0056] Specifically, the temperature sensing component 1013 in the self-balancing regulator 101 is perpendicular to the server node. The temperature sensing component 1013 is a solid material with a high linear thermal expansion coefficient and a high thermal conductivity coefficient, such as magnesium, aluminum or their alloy materials. When the temperature of the server node rises during operation of the second lever member, the temperature sensing component 1013 senses the temperature rise and linearly expands, that is, it elongates in the vertical direction. Since the temperature sensing component 1013 is connected to the second lever member 10122, the temperature sensing component 1013 drives the second lever member 10122 to have an upward vertical position, and then through the fulcrum 10123, it is converted into an angular displacement to drive the first lever member 10121 to have a downward vertical displacement. Furthermore, the movable shutter in the lever adjustment actuator 1011 connected to the first lever member 10121 moves downward, thereby enlarging the opening of the valve port of the liquid distribution branch pipe 102, and thus increasing the coolant flow rate in the liquid distribution branch pipe 102.

[0057] Thus, based on the materials with a high linear expansion coefficient and a high thermal conductivity coefficient, the linear expansion relative to the temperature change can be calculated when the temperature changes. Among them, the change value △L of the temperature sensing component is determined according to the linear expansion of the current material and the temperature change. The specific formula (1) is as follows:

[0058] △L = α × △T × L (1)

[0059] Wherein, △L is the dimension change, α is the linear expansion coefficient, △T is the temperature difference, and L is the original length of the temperature sensing component 1013. After the dimension of the temperature sensing component 1013 changes, since the second lever member 10122 is perpendicularly connected to the temperature sensing component, the temperature sensing component 1013 will drive the second lever member 10122 to undergo a perpendicular displacement, that is, move upward or downward by a distance corresponding to the dimension change; and due to the lever structure, the upward or downward displacement of the second lever member 10122 will be converted into a downward or upward displacement of the first lever member 10121 through the fulcrum, and the displacement distance is also △L; at the same time, since the second lever member 10121 is connected to the movable gate 10112 of the lever adjustment actuator 1011, the displacement of the movable gate can be determined to be △L. At the same time, since the required coolant flow rate can be determined according to the temperature change, the cross-sectional area of the pipeline can be calculated based on the coolant flow rate and the displacement of the movable gate during design, and then the radius of the liquid distribution branch pipe 102 can be obtained.

[0060] Wherein, the first lever member 10121 and the second lever member 10122 are made of adiabatic and ultra-low linear thermal expansion coefficient materials such as non-metallic materials or metal oxides, so as to prevent errors in △L caused by the expansion or contraction of the first lever member and the second lever member when the temperature of the server node changes, thereby making it difficult for the server node to be cooled to a certain temperature range. At the same time, to ensure that the displacements of the temperature sensing component 1013, the second lever member 10122, the first lever member 101221, and the movable gate 10112 are the same, such as Figure 2 and Figure 3 , it is required that the temperature sensing component 1013 is perpendicularly arranged with respect to the second lever member 10122; the first lever member 10121 is perpendicularly arranged with respect to the movable gate 10112. Among them, the specific shape of the movable gate 10112 of the lever adjustment actuator 1011 is determined according to the actual situation, especially the shape of the valve body 10111, and can be a convex shape, a square shape, or a double-wedge gate, etc.

[0061] In some embodiments, the structure of the lever execution regulator 1011 can be as shown in Figure 3 . The valve body 10111 provided in the liquid distribution branch pipe is circular, the movable gate 10112 is adapted to the structure of the valve body 10111 and is arc-shaped, and the connecting rod 10113 is connected to the movable gate 10112. Thus, when the first lever member 10121 moves downward, the connecting rod 10113 connected to the first lever member 10121 drives the movable gate 10112 to move downward, and then the opening degree of the valve body 10111 becomes larger, and the coolant flow rate increases.

[0062] In some embodiments, the structure of the lever execution regulator 1011 can also be as shown in Figure 4The square shown, at this time, the movable gate 10112 in the valve body 10111 is square, or as Figure 5 shown in the double-wedge shape. Similarly, the first lever member 10121 and the movable gate 10112 are connected by the connecting rod 10113. Thus, the vertical displacement of the first lever member 10121 can drive the movable gate to move up and down, thereby adjusting the opening degree of the valve body 10111, and thus controlling the flow rate of the coolant.

[0063] Exemplarily, when the temperature of a server node rises, the corresponding temperature sensing component 1013 expands according to the temperature change of the server node, causing the lever member 1012 to tilt as the temperature sensing component 1013 expands. At the same time, the movable gate 10112 in the lever adjustment actuator 1011 follows the tilt of the lever member 1012 to move downward, causing the position of the movable gate 10112 to decrease, the cross-sectional area of the flow-through channel to increase, and the coolant flow rate to increase. Therefore, the coolant flow rate into the server node increases, the cooling effect is enhanced, causing the temperature of the server node to decrease. During the process of the server temperature node decreasing, the temperature decrease will cause the temperature sensing component 1013 to linearly contract, causing the tilt degree of the lever member 1012 to become smaller, and further causing the position of the movable gate 10112 to rise, the cross-sectional area of the flow-through channel to decrease, and the coolant flow rate of the server node to decrease. Thus, it is possible to dynamically adjust the coolant flow rate flowing to the server node according to the temperature change of the server node, and control the temperature of the server node within the target range.

[0064] In the embodiment of the present invention, a coolant flow rate dynamic adjustment device provided with a self-balancing regulator is used. The temperature sensing component connected by the self-balancing regulator senses the temperature change of the server node, and linearly expands or contracts based on the temperature change of the server node, thereby driving the displacement of the lever member at one end of the self-balancing regulator, and transmitting this displacement to one end connected to the movable gate of the lever adjustment actuator. Thus, the movable gate of the lever adjustment actuator is driven to move. Since the upper part of the movable gate of the lever execution regulator is the flow-through channel of the fluid, therefore, the movement of the movable gate causes the opening degree of the flow-through channel to increase or decrease, and finally causes the coolant flow rate to increase or decrease, so as to realize the dynamic adjustment of the coolant flow rate according to the temperature change of the server node, and keep the temperature of the server node within a target range all the time.

[0065] Embodiment Two

[0066] Referring to Figure 6 , Figure 6 shows a structural schematic diagram of a single-phase immersion liquid cooling control system provided by an embodiment of the present invention. As Figure 6 shown, it includes:

[0067] The coolant flow rate dynamic adjustment device 100, the first circulation pump 200, the data acquisition module 300, and the control module 400 described in the above-mentioned first embodiment;

[0068] Among them, the first circulation pump 200 and the coolant flow rate dynamic adjustment device 100 form a cooling circuit for a plurality of server nodes in the immersion heat exchange cavity 103 of the coolant flow rate dynamic adjustment device 100;

[0069] The data acquisition module 300 is connected to the immersion heat exchange cavity 103, and the data acquisition module 300 is used to collect the total power consumption of a plurality of server nodes in the immersion heat exchange cavity 103;

[0070] The control module 400 is connected to the first circulation pump 200, and the control module 400 is used to control the rotation speed of the first circulation pump 200 according to the total power consumption to control the total flow rate of the coolant.

[0071] Specifically, during the circuit design process, the target temperature T of the server node, the rotation speed r of the first circulation pump, and the coolant flow rate Q can be designed v , that is, when the server node is at the target temperature T, the rotation speed of the circulation pump is a fixed value r, and the coolant flow rate is Qv.

[0072] When the temperature of the server node changes, the data acquisition module 300 first reads the total power consumption in the immersion heat exchange cavity 103, and the control module 400 adjusts the rotation speed of the first circulation pump 200 according to the total power consumption to realize the reasonable supply of the total flow rate of the immersion heat exchange cavity 103. Taking the reduction of the power consumption of CPU1 inside the node and the unchanged power consumption of CPU2 and 3 as an example, the data acquisition module 300 detects the total power consumption inside the immersion cavity 103. At this time, since the power consumption of CPU1 decreases, when the data acquisition module 300 detects that the total power consumption inside the immersion heat exchange cavity 103 decreases, the control module 400 reduces the rotation speed of the first circulation pump 200 according to the detection result, so that the coolant flow rate into the immersion heat exchange cavity 103 decreases.

[0073] The specific adjustment basis and derivation process are as follows:

[0074] According to the calculation formula (2) of the convective heat transfer coefficient hx in heat transfer:

[0075] hx = 0.332 * λ / x * Re^0.5 * Pr^1 / 3 (2)

[0076] Among them, λ is the thermal conductivity, which is a fixed value when the material is certain; Pr is the Prandtl number, which is a fixed value under the same temperature and pressure; x is the characteristic dimension, representing the inner diameter of the pipe, which is also a fixed value; and the Reynolds number is calculated by formula (3):

[0077] Re = ρvx / η (3)

[0078] Among them, v is the coolant flow rate, ρ is the density, x is the characteristic dimension, η is the dynamic viscosity. When ρ, x, and η are constants under fixed other conditions, the Reynolds number has a linear relationship with the coolant flow rate. It can be seen from formulas (2) and (3) that when other parameters are constants and fixed values, the convective heat transfer coefficient hx is proportional to the 0.5th power of the flow rate, and the flow rate is also proportional to the flow rate. Therefore, it can be deduced that the convective heat transfer system hx is proportional to the flow rate Q v to the 0.5th power.

[0079] After that, according to the convective heat transfer calculation formula (4):

[0080] Q = hx*A*(T w -T ∞ ) (4)

[0081] Among them, T W is the heat source temperature, t ∞ is the temperature of the coolant entering, A is the heat transfer area, T W , T ∞ are fixed values, and A is a constant. It can be obtained that the power consumption Q and the convective heat transfer coefficient hx have a linear relationship. Then, since the convective heat transfer system hx is proportional to the 0.5th power of the flow rate Q v ; according to these two relationships, it can be deduced that the power consumption Q is proportional to the 0.5th power of the flow rate Qv. The relationship is expressed as:

[0082] Q=K Q v 0.5 Or Q v =(Q / K) 2

[0083] Among them, Q is the power consumption, Qv is the coolant flow rate, and K is a coefficient;

[0084] Since the flow rate Qv of the first circulation pump and the rotation speed Sp of the first circulation pump have a linear relationship, the relationship between the rotation speed Sp of the circulation pump and the power consumption Q can be obtained:

[0085] Sp=K1(Q / K) 2

[0086] Among them, K1 is the characteristic coefficient of the pump, and Sp is the rotation speed of the circulation pump. Thus, the coolant flow rate and the rotation speed of the circulation pump can be calculated based on the total power consumption of the server node.

[0087] As can be seen from the above derivation, when the coolant temperature is constant and the same heat source temperature is set, the total power consumption of the node and the required flow rate are constant. That is, when the total power consumption of the node is determined, the coolant flow rate required to reduce the node temperature to the target temperature T is determined. Therefore, the rotation speed of the first circulation pump can be controlled according to the detected node temperature, thereby determining the coolant flow rate.

[0088] When it is determined according to the data acquisition result of the data acquisition module that the total power consumption inside the cavity decreases, the rotation speed of the circulation pump decreases, and the total coolant flow rate decreases. At this time, the coolant flow rate entering each liquid distribution branch pipe decreases. However, since the power consumption of CPU2 and CPU3 does not decrease, the temperatures of CPU2 and CPU3 increase, while the power consumption of CPU1 decreases and the current coolant flow rate is still relatively high, so the temperature of CPU1 decreases. Therefore, the coolant dynamic adjustment devices of CPU2 and CPU3 will increase the opening degree of the corresponding liquid distribution branch pipes according to the increase in the temperatures of CPU2 and CPU3, so that the coolant flow rate of the liquid distribution branch pipes of CPU2 and CPU3 increases; while the coolant dynamic adjustment device of CPU1 will decrease the opening degree of the corresponding liquid distribution branch pipe according to the decrease in the temperature of CPU1, so that the coolant flow rate of the liquid distribution branch pipe of CPU1 decreases, thereby enabling all three CPUs to be within a suitable temperature range.

[0089] In some embodiments, the control system further includes:

[0090] A flow equalizing distributor 500, which is arranged between the first circulation pump 200 and the coolant flow rate dynamic adjustment device 100, and is used to evenly distribute the coolant to each liquid distribution branch pipe 102;

[0091] A liquid collector 600, which is arranged after the coolant flow rate dynamic adjustment device 100 to collect the coolant for heat dissipation.

[0092] In the embodiment of the present invention, the flow equalizing distributor 500 is arranged before the multiple liquid distribution branch pipes 102 of the coolant flow rate dynamic adjustment device 100 to evenly introduce the coolant into each liquid distribution branch pipe 102 when the liquid-cooled server is working. When the opening degree of the liquid distribution branch pipe 102 changes, since the cross-sectional area of the inlet of the liquid distribution branch pipe 102 changes, the flow rate of each liquid distribution branch pipe 102 changes. During the continuous introduction of the coolant, the coolant that has exchanged heat with the server node flows out from the other end of the immersion heat exchange cavity 103 of the coolant flow rate dynamic adjustment device 100, and the coolant flowing out from different positions is collected together through the liquid collector 600 for centralized heat dissipation, so as to recycle the coolant.

[0093] Among them, for the heat dissipation of the coolant, a radiator can be set in the loop to dissipate the heat of the coolant to the target environment through the radiator, or a heat exchanger can be set to exchange heat with the cooling liquid, gas, etc. of other loops to achieve the heat dissipation effect.

[0094] In some embodiments, a regulating valve 700 can also be set in the control system. The regulating valve 700 is set between the first circulation pump 200 and the coolant flow dynamic regulating device 100. Thus, the flow rate of the coolant can be jointly regulated by the first circulation pump 200 and the regulating valve 700, so as to control the temperature of the server node within a certain temperature range.

[0095] In some embodiments, the control system further includes:

[0096] A heat dissipation loop 800, the heat dissipation loop 800 includes a second circulation pump 801, a heat dissipation end 802, and a heat exchanger 803 arranged in sequence. The heat dissipation loop 800 is used to dissipate the heat of the coolant flowing out of the coolant flow dynamic regulating device 100; among them, the heat exchanger 803 is also located in the cooling loop and is set between the coolant flow dynamic regulating device 100 and the first circulation pump 200.

[0097] In the embodiment of the present invention, the heat dissipation loop 800 is used to dissipate the heat of the coolant flowing out of the immersion heat exchange cavity 103. The second circulation pump 801 pumps the coolant into the heat dissipation loop in a cycle. The coolant flows through the heat dissipation end 802 and the heat exchanger 803 in sequence from the second circulation pump 801, and after exchanging heat with the coolant flowing out of the immersion heat exchange cavity 103 at the heat exchanger 803, it passes through the second circulation pump 801 again to recycle the coolant.

[0098] Among them, the rotation speed of the second circulation pump 801 of the heat dissipation loop 800 is determined according to the rotation speed of the first circulation pump 200, so as to adjust the heat-exchanged coolant to a fixed temperature, thereby ensuring the adjustment effect of the coolant on the server node.

[0099] The single-phase immersion liquid cooling control system of the embodiment of the present invention determines the rotation speed of the first circulation pump by obtaining the total power consumption of the server nodes in the immersion heat exchange cavity. Thus, the control module adjusts the rotation speed of the first circulation pump to the corresponding rotation speed to introduce the corresponding total flow rate of coolant into the immersion heat exchange cavity to exchange heat with the server nodes. And because the coolant flow dynamic regulating device of the above embodiment is adopted, by distributing a certain total flow rate of coolant to each server node through the liquid distribution branch pipes, and dynamically regulating the coolant flow rate of each liquid distribution branch pipe through the self-balancing regulator therein, the temperature of the server node corresponding to each liquid distribution branch pipe is controlled within a certain range, avoiding the situation that the node temperature deviates from the target temperature and the temperature control fails.

[0100] It should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0101] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0102] Finally, it should also be noted that in this text, relational terms such as "first" and "second" are only used 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. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0103] It should also be noted that in this text, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, relational terms such as "first" and "second" are only used 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, nor can they be construed as indicating or implying relative importance. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0104] The above has introduced the technical solution provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only for helping to understand the present invention, and the content of this specification should not be construed as a limitation to the present invention. At the same time, for those of ordinary skill in the art, according to the present invention, there will be various forms of changes in the specific implementation manner and application scope. It is not necessary and impossible to enumerate all the implementation manners here, and the obvious changes or variations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A coolant flow dynamic regulation device, characterized in that, the device includes: a submerged heat exchange cavity and multiple liquid distribution branch pipes; multiple server nodes are arranged in the submerged heat exchange cavity; wherein, each liquid distribution branch pipe is connected to one of the server nodes in the submerged heat exchange cavity through its corresponding self-balancing regulator to cool the server node; the self-balancing regulator includes: a lever regulating actuator, a lever member, and a temperature sensing component; the lever regulating actuator is connected to the temperature sensing component through the lever member; wherein, the temperature sensing component is connected to the server node and is configured to adjust the inclination of the lever member based on the temperature change of the server node, and the lever regulating actuator is configured to change the coolant flow rate flowing into the server node in the liquid distribution branch pipe when the inclination of the lever member changes; the coolant of the liquid distribution branch pipe flows out of the submerged heat exchange cavity; the lever member includes a first lever member, a second lever member, and a fulcrum. The first lever member is connected to the lever regulating actuator, the second lever member is connected to the temperature sensing component, the fulcrum is fixed to the inner wall of the submerged heat exchange cavity, the first lever member and the second lever member are respectively arranged on both sides of the fulcrum and are connected through the fulcrum; wherein, the first lever member and the second lever member are made of non-linear expansion materials; the lever regulating actuator includes a movable gate plate, and the gate plate is arranged on the side of the liquid distribution branch pipe close to the server node and is configured to change the size of the opening communicating between the liquid distribution branch pipe and the server node when moving up and down, so as to change the coolant flow rate entering the server node.

2. The coolant flow dynamic regulation device according to claim 1, characterized in that, the temperature sensing component is made of linear expansion material, and the temperature sensing component is arranged perpendicular to the server node; the temperature sensing component is configured to displace in the vertical direction based on the temperature change of the server node, so as to tilt the lever member.

3. The coolant flow dynamic regulation device according to claim 2, characterized in that, the temperature sensing component is arranged perpendicular to the first lever member, so that the temperature sensing component drives the first lever member to displace in the vertical direction.

4. The coolant flow dynamic regulation device according to claim 1, characterized in that, the movable gate plate is perpendicularly connected to the second lever member in the lever member, so that the second lever member drives the movable gate plate to displace in the vertical direction.

5. The coolant flow dynamic regulation device according to claim 1, characterized in that, the movable gate plate is a convex, square or double-wedge gate plate.

6. A single-phase immersion liquid cooling control system, characterized in that, the control system includes: the coolant flow dynamic regulation device according to any one of claims 1-5 above, a first circulation pump, a data acquisition module, and a control module; Wherein, the first circulation pump and the coolant flow dynamic regulation device form a cooling loop for dissipating heat from multiple server nodes in the immersion heat exchange cavity of the coolant flow dynamic regulation device; The data acquisition module is connected to the immersion heat exchange cavity, and the data acquisition module is used to acquire the total power consumption of multiple server nodes in the immersion heat exchange cavity; The control module is connected to the first circulation pump, and the control module is used to control the rotation speed of the circulation pump according to the total power consumption to control the total flow rate of the coolant flowing into the coolant flow dynamic regulation device.

7. The single-phase immersion liquid cooling control system according to claim 6, characterized in that, The control system further includes: A flow equalizing distributor, which is arranged between the first circulation pump and multiple liquid distribution branch pipes, and is used to evenly distribute the coolant to each liquid distribution branch pipe; A liquid collector, which is arranged after the immersion heat exchange cavity and is used to collect the coolant for heat dissipation.

8. The single-phase immersion liquid cooling control system according to claim 7, characterized in that, The control system further includes: A heat dissipation loop, which includes a second circulation pump, a heat dissipation end, and a heat exchanger arranged in sequence. The heat dissipation loop is used to dissipate heat from the coolant flowing out of the coolant flow dynamic regulation device; wherein, the heat exchanger is also located in the cooling loop and is arranged between the coolant flow dynamic regulation device and the first circulation pump.

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