Liquid cooling plate

Abstract

The utility model discloses a liquid cooling plate, and relates to the technical field of liquid cooling, the liquid cooling plate comprises a plate-shaped body, a cooling flow channel structure is arranged in the plate-shaped body, and the cooling flow channel structure comprises a flow channel inlet, a flow channel outlet and at least one cooling flow channel communicated between the flow channel inlet and the flow channel outlet; the cooling flow channel comprises a heat exchange flow dividing section with at least one stage of flow dividing branch channel, a heat exchange concentration section with a plurality of heat exchange flow channels and a heat exchange flow gathering section with at least one stage of flow gathering branch channel, and the heat exchange flow dividing section, the heat exchange concentration section and the heat exchange flow gathering section are sequentially arranged in a communicating mode in the flowing direction of a cooling medium in the cooling flow channel. The at least one stage of shunting branch channel can uniformly distribute a cooling medium flowing into the cooling flow channel into the plurality of heat exchange flow channels, and the at least one stage of converging branch channel can converge the cooling medium in the plurality of heat exchange flow channels to flow out of the cooling flow channel. Thus, on the basis that the heat dissipation requirements of the front-end low-heat area and the rear-end low-heat area are met, efficient heat exchange of the high-heat area is achieved, and the heat dissipation effect, energy conservation and consumption reduction are both considered.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling, in particular to a liquid cooling plate. Background Art

[0002] As the demand for computing power explodes, data centers, as key carriers of data, provide the core driving force for the high-quality development of the digital economy. The rapid increase in the proportion of high-power data center cabinets has put forward higher requirements for equipment heat dissipation and cooling. Compared with traditional air cooling technology, liquid cooling technology fundamentally improves the heat dissipation mode of the main equipment, and can better meet the precise cooling of high-density cabinet chip level, with the advantages of energy saving, quietness, noise reduction, and space saving.

[0003] Liquid cooling plates use liquid as a heat transfer medium to flow through their internal channels, cooling the heat source through heat transfer. Depending on the air-liquid cooling ratio of the server, high-power heat-generating components such as the CPU / GPU of the server are cooled by liquid cooling plates. However, traditional liquid cooling plates have problems such as high pressure drop, uneven flow channels, large temperature differences, and insufficient heat dissipation capacity. As the temperature rises, the performance, life, and stability of the chip will be affected. According to the Arrhenius equation, the operating life of components is halved for every 10°C increase in temperature.

[0004] At present, most liquid cooling plates use linear series flow channels that are easy to process because the linear structure is easy to process, but they face the problem of uneven flow distribution. As an improvement, the zigzag, serpentine and S-shaped cooling channels have solved the problem of uneven flow distribution to a certain extent. However, the overall flow channel length of the S-shaped cooling channel is relatively long. Under the same conditions, the longer the pipeline length, the greater the flow resistance and pressure drop, and thus the greater the energy loss; the cooling medium in the zigzag or serpentine cooling channel has multiple flow direction changes, and the fluid fluctuates greatly at the right-angle bend, which will produce greater resistance, thereby increasing the pressure loss of the pipeline.

[0005] Therefore, how to reduce flow resistance and pressure drop while facilitating processing and achieving uniform flow distribution is a technical problem faced by those skilled in the art. Utility Model Content

[0006] The utility model aims to provide a liquid cooling plate, which at least solves the problems of large flow resistance and pressure drop and insufficient heat dissipation capacity of the liquid cooling plate in the prior art.

[0007] The above-mentioned purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] The utility model provides a liquid cooling plate, comprising a plate-shaped body, wherein a cooling channel structure is arranged in the plate-shaped body, wherein the cooling channel structure comprises a channel inlet, a channel outlet and at least one cooling channel connected between the channel inlet and the channel outlet;

[0009] The cooling channel includes a heat exchange diversion section having at least one level of diversion branches, a heat exchange concentration section having multiple heat exchange channels and a heat exchange concentration section having at least one level of concentration branches. The heat exchange diversion section, the heat exchange concentration section and the heat exchange concentration section are connected in sequence along the flow direction of the cooling medium in the cooling channel. At least one level of the diversion branches can evenly distribute the cooling medium flowing into the cooling channel to multiple heat exchange channels, and at least one level of the concentration branches can converge the cooling medium in multiple heat exchange channels to flow out of the cooling channel.

[0010] Preferably, the cooling channel structure includes a plurality of cooling channels that are spaced apart and arranged side by side, the plurality of cooling channels are connected to the channel inlet through a main liquid inlet channel, and the plurality of cooling channels are connected to the channel outlet through a main liquid outlet channel.

[0011] Preferably, the branch flow channels are multi-stage, and the number of the branch flow channels at each stage is increased along the flow direction of the cooling medium in the cooling channel.

[0012] Preferably, the flow-converging branches are multi-stage, and the number of the flow-converging branches at each stage is arranged to decrease along the flow direction of the cooling medium in the cooling flow channel.

[0013] Preferably, in the direction from the heat exchange diversion section to the heat exchange concentration section, an arc-shaped transition section is formed between the diversion branches at each stage, and the angles between the diversion branches connected to the two ends of the arc-shaped transition section and the tangents of the arc-shaped transition section are not greater than 60°.

[0014] Preferably, the flow branch channel and the flow converging branch channel are symmetrically arranged on both sides of the heat exchange concentrated section.

[0015] Preferably, the length of the heat exchange flow channel is greater than the length of the flow branch channels at each level and the flow converging branch channels at each level; the number of the heat exchange flow channels is greater than the number of the flow branch channels at each level and the flow converging branch channels at each level.

[0016] Furthermore, along the flow direction of the cooling medium in the cooling channel, a plurality of spoiler columns are arranged at intervals in the cooling channel.

[0017] Specifically, the plate-shaped body includes a first plate body and a second plate body that are matingly connected, and the cooling channel structure is arranged on the first plate body and / or the second plate body.

[0018] Preferably, the first plate body is a base plate, the second plate body is a sealing cover plate, and the cooling channel structure is provided on the base plate.

[0019] The characteristics and advantages of the utility model are as follows: the liquid cooling plate provided by the utility model is provided with a cooling channel structure including at least one cooling channel in the plate-shaped body, and the cooling channel includes a heat exchange diversion section with at least one level of diversion branch channel, a heat exchange concentration section with multiple heat exchange channels and a heat exchange concentration section with at least one level of concentration branch channel. In this way, the cooling medium is evenly distributed to the multiple heat exchange channels through the diversion branch channels, and on the basis of meeting the heat dissipation requirements of the front-end low heat zone, efficient heat exchange of the high heat zone is achieved; at the same time, the cooling medium is converged and flows out of the cooling channel through the concentration branch channels, and on the basis of meeting the heat dissipation requirements of the rear-end low heat zone, the temperature difference is reduced, the temperature uniformity is improved, and unnecessary energy loss is avoided; in addition, by arranging an arc transition structure between adjacent upper and lower level channels, the local flow resistance of the cooling medium is reduced, the pressure drop is reduced, and thus the energy loss is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the planar structure of the first plate body of the liquid cooling plate provided in an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the first plate body of the liquid cooling plate provided in an embodiment of the present utility model;

[0023] Figure 3 It is a schematic diagram of an explosion of the liquid cooling plate provided in the embodiment of the utility model.

[0024] Description of Figure Numbers:

[0025] 100. Plate body; 110. First plate body; 120. Second plate body;

[0026] 200, cooling channel; 210, heat exchange flow division section; 211, flow division branch channel; 220, heat exchange concentration section; 221, heat exchange channel; 230, heat exchange concentration section; 231, flow concentration branch channel;

[0027] 300, flow channel entrance;

[0028] 400, flow channel outlet;

[0029] 500, liquid inlet main flow channel;

[0030] 600, liquid outlet main flow channel;

[0031] α, the first angle; β, the second angle. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figures 1 to 3 As shown, the utility model provides a liquid cooling plate, including a plate-shaped body 100, a cooling channel structure is arranged in the plate-shaped body 100, and the cooling channel structure includes a channel inlet 300, a channel outlet 400 and at least one cooling channel 200 connected between the channel inlet 300 and the channel outlet 400. Figure 1 As shown, the cooling channel 200 includes a heat exchange shunt section 210 having at least one level of shunt branch channel 211, a heat exchange concentration section 220 having multiple heat exchange channels 221, and a heat exchange concentration section 230 having at least one level of concentration branch channel 231. The heat exchange shunt section 210, the heat exchange concentration section 220, and the heat exchange concentration section 230 are sequentially connected and arranged along the flow direction of the cooling medium in the cooling channel 200. At least one level of shunt branch channel 211 can evenly distribute the cooling medium flowing into the cooling channel 200 to multiple heat exchange channels 221, and at least one level of concentration branch channel 231 can converge the cooling medium in multiple heat exchange channels 221 and flow out of the cooling channel 200. Specifically, the cooling channel 200 can be arranged in multiples according to the actual heat dissipation requirements. Furthermore, to ensure heat dissipation efficiency, according to the operating environment conditions, the number of diversion branches 211 can be increased or the number of converging branches 231 can be reduced or the length of diversion branches 211 can be extended or the length of converging branches 231 can be shortened; or, the number of diversion branches 211 can be reduced or the number of converging branches 231 can be increased or the length of diversion branches 211 can be shortened or the length of converging branches 231 can be extended, so that the multiple heat exchange channels 221 of the heat exchange concentration section 220 are directly facing the high-temperature area of ​​the server chip in the data center, so as to take into account both heat dissipation effect and energy saving and consumption reduction.

[0034] Among them, multiple cooling channels 200 can be arranged in parallel, that is, along the flow direction of the cooling medium in the cooling channel 200, the heat exchange diversion section 210, the heat exchange concentration section 220 and the heat exchange concentration section 230 of each cooling channel 200 are at the same distance from the upstream end of the plate-like body 100, so as to meet the small area high heat dissipation demand of the concentrated high heat zone; of course, multiple cooling channels 200 can also be flexibly staggered according to actual heat dissipation needs, that is, along the flow direction of the cooling medium in the cooling channel 200, the heat exchange diversion section 210, the heat exchange concentration section 220 and the heat exchange concentration section 230 of each cooling channel 200 are at different distances from the upstream end of the plate-like body 100, so as to meet the large area high heat dissipation demand of the dispersed high heat zone.

[0035] Specifically, Figure 3 As shown, the plate-shaped body 100 includes a first plate body 110 and a second plate body 120 that are mated and connected, and the cooling channel structure is arranged on the first plate body 110 and / or the second plate body 120. Specifically, as Figure 3 As shown, the plate-like body 100 of the liquid cooling plate includes a first plate body 110 and a second plate body 120 that are mated with each other. A cooling channel structure is provided on one of the first plate body 110 and the second plate body 120, and the other of the first plate body 110 and the second plate body 120 forms a sealing cover plate. After the first plate body 110 and the second plate body 120 are mated with each other, the cooling channel structure is sealed between the two mating surfaces of the first plate body 110 and the second plate body 120 to ensure the sealed flow of the cooling medium, thereby ensuring the heat dissipation efficiency and heat dissipation safety.

[0036] Preferably, if Figure 3 As shown, the first plate body 110 is a base plate, the second plate body 120 is a sealing cover plate, and a cooling channel structure is provided on the base plate.

[0037] Preferably, if Figure 1 and Figure 2 As shown, the cooling channel structure includes a plurality of cooling channels 200 arranged side by side at intervals, the plurality of cooling channels 200 are connected to the channel inlet 300 through the liquid inlet main channel 500, and the plurality of cooling channels 200 are connected to the channel outlet 400 through the liquid outlet main channel 600. Specifically, as Figure 1 and Figure 2As shown, when the number of cooling channels 200 is two or more, a liquid inlet main channel 500 is provided between the channel inlet 300 and the medium inlet of each cooling channel 200, and a liquid outlet main channel 600 is provided between the medium outlet of each cooling channel 200 and the channel outlet 400. The cooling medium entering from the channel inlet 300 is distributed to each cooling channel 200 through the liquid inlet main channel 500, flows through the cooling channel 200 and converges to the liquid outlet main channel 600 to flow out. In this way, by providing the liquid inlet main channel 500 and the liquid outlet main channel 600 to connect multiple cooling channels 200, the cooling medium entering from the channel inlet 300 is diverted, and the cooling medium flows through multiple cooling channels 200 and converges in the liquid outlet main channel 600 before flowing out from the channel outlet 400, thereby realizing large-area heat exchange of data center server chips.

[0038] Preferably, if Figure 1 and Figure 2 As shown, the branch channel 211 is multi-stage, and the number of branch channels 211 at each stage is set in increasing order along the flow direction of the cooling medium in the cooling channel 200. Specifically, the branch channel is a multi-stage tree structure, and in the direction from the heat exchange branch section 210 to the heat exchange concentration section 220, the upstream end of the cooling channel 200 forms the tree head of the tree structure, and the downstream end of the cooling channel 200 forms the tree tail of the tree structure, and a multi-branch tree structure is formed between two adjacent levels of branch channels 211. In this way, by gradually increasing the number of branch channels 211, the heat exchange area is increased, and the heat exchange effect is improved, so as to effectively cope with the situation where the temperature of the cooling medium in the cooling channel 200 gradually rises. Preferably, a binary tree structure is formed between two adjacent levels of branch channels 211, so as to better achieve uniform distribution of the cooling medium from the upper branch channel 211 to the lower branch channel 211.

[0039] Preferably, if Figure 1 and Figure 2As shown, the flow-collecting branch channel 231 is multi-stage, and the number of each level of flow-collecting branch channels 231 is set in decreasing order along the flow direction of the cooling medium in the cooling channel 200. Specifically, the flow-collecting branch channel 231 is a multi-stage tree structure, and in the direction from the heat exchange concentration section 220 to the heat exchange concentration section 230, the upstream end of the cooling channel 200 forms the tree tail of the tree structure, and the downstream end of the cooling channel 200 forms the tree head of the tree structure, and a multi-branch tree structure is formed between two adjacent levels of flow-dividing branch channels 211, that is, the heat exchange concentration section 220 is both the tree tail tip of the heat exchange diversion section 210 and the tree tail tip of the heat exchange concentration section 230. In this way, after the cooling medium enters the heat exchange diversion section 210 corresponding to the front low heat zone, it flows through the heat exchange diversion section 210 step by step to reach the heat exchange concentration section 220 corresponding to the high heat zone, and then flows out of the heat exchange concentration section 220 to reach the heat exchange concentration section 230 corresponding to the rear low heat zone, and flows out step by step through the various levels of concentration branches 231. In this process, in the front low heat zone, the number of diversion branches 211 is gradually increased to effectively deal with the gradual increase in the temperature of the cooling medium in the cooling channel 200; in the high heat zone, the heat exchange area is increased by multiple heat exchange channels 221 to improve the heat exchange effect; in the rear low heat zone, the number of concentration branches 231 is gradually reduced to reduce the heat exchange area, and on the basis of meeting the heat dissipation requirements, the temperature difference is reduced, the temperature uniformity is improved, and unnecessary energy consumption is avoided, thereby saving energy and reducing consumption.

[0040] Preferably, if Figure 1 As shown, from the heat exchange branch section 210 to the heat exchange concentration section 220, arc-shaped transition sections are formed between the branch channels 211 at each level, and the angles between the branch channels connected to the two ends of the arc-shaped transition section and the tangents of the arc-shaped transition section are not greater than 60°. Figure 1 As shown, the arc transition section is S-shaped, and in the direction from the heat exchange diversion section 210 to the heat exchange concentration section 220, the arc transition section has a first tangent and a second tangent, and the diversion branch 211 connected to the upstream end of the arc transition section has a first angle α with the first tangent, and the diversion branch 211 connected to the downstream end of the arc transition section has a second angle β with the second tangent, and the first angle α and the second angle β are both not greater than 60°. In this way, an arc transition in the downstream direction is formed between adjacent upper and lower flow channels to reduce the local flow resistance of the cooling medium, reduce the pressure drop, and thus reduce energy loss.

[0041] Preferably, if Figure 1 As shown, the flow branch channel 211 and the flow converging channel 231 are symmetrically arranged on both sides of the heat exchange concentrated section 220, that is, the flow branch channel 211 and the flow converging channel 231 are symmetrically arranged about the heat exchange concentrated section 220. In this way, the cooling channel structure is a symmetrical tree structure as a whole, which is not only easy to process, but also can match the high heat area and low heat area of ​​the data center server chip with targeted heat dissipation, with high heat exchange efficiency and strong heat dissipation capacity, thereby extending the service life of the chip.

[0042] Preferably, if Figure 1 As shown, the length of the heat exchange channel 221 is greater than the length of each level of the branch channel 211 and the length of each level of the converging channel 231; the number of the heat exchange channel 221 is greater than the number of each level of the branch channel 211 and the number of each level of the converging channel 231. Specifically, the length and cross-sectional size of the heat exchange channel 221, the length and cross-sectional size of the branch channel 211 at each level, and the length and cross-sectional size of the converging channel 231 at each level can be flexibly set according to actual heat dissipation requirements. Preferably, the heat exchange channel 221 corresponding to the high heat zone is arranged longer and denser, along the flow direction of the cooling medium in the cooling channel 200, the branch channel 211 of the heat exchange branch section 210 is designed to extend and diffuse from the front low heat zone to the high heat zone according to the heat dissipation requirements, and the converging channel 231 of the heat exchange converging section 230 extends and condenses from the high heat zone to the rear low heat zone.

[0043] Furthermore, along the flow direction of the cooling medium in the cooling channel 200, a plurality of spoiler columns are arranged at intervals in the cooling channel 200. By arranging the spoiler columns, the contact area with the cooling medium is increased. At the same time, the spoiler columns can cause the cooling medium to form strong turbulence and vortexes, thereby destroying the boundary layer and improving the heat transfer coefficient and heat transfer efficiency. Preferably, the number of spoiler columns arranged in each heat exchange channel 221 of the heat exchange concentration section 220 is greater than the number of spoiler columns arranged in each branch channel 211 of the heat exchange diversion section 210 and the number of spoiler columns arranged in each branch channel 231 of the heat exchange concentration section 230. Among them, the spoiler columns can also be replaced by fins or other structures that can turbulent the cooling medium, and the utility model does not limit this.

[0044] Furthermore, temperature sensors and flow meters may be set at corresponding positions in the cooling channel 200. Based on the detection values ​​of the temperature sensors and flow meters and the heat dissipation requirements of the data center server chips, the number of spoiler columns may be increased or decreased accordingly, and / or the setting positions of the spoiler columns in the cooling channel 200 may be adjusted, thereby adjusting the flow rate of the cooling medium in the cooling channel 200 to match the different heat dissipation requirements of the data center server chips.

[0045] Based on the above structural description, the liquid cooling plate provided by the embodiment of the utility model has the following beneficial effects:

[0046] The liquid cooling plate provided by the embodiment of the utility model is provided with a cooling channel structure including at least one cooling channel 200 in the plate-like body 100, and the cooling channel 200 includes a heat exchange diversion section 210 with at least one level of diversion branch channel 211, a heat exchange concentration section 220 with multiple heat exchange channels 221 and a heat exchange concentration section 230 with at least one level of concentration branch channel 231. In this way, the cooling medium is evenly distributed to the multiple heat exchange channels 221 through the diversion branch channel 211, and efficient heat exchange of the high heat zone is achieved on the basis of meeting the heat dissipation demand of the front low heat zone; at the same time, the cooling medium is converged and flows out of the cooling channel 200 through the concentration branch channel 231, and the temperature difference is reduced, the temperature uniformity is improved, and unnecessary energy loss is avoided on the basis of meeting the heat dissipation demand of the rear low heat zone; in addition, by arranging an arc transition structure between adjacent upper and lower level channels, the local resistance is reduced, the pressure drop is reduced, and the energy loss is reduced.

[0047] The above are only several embodiments of the present invention. Those skilled in the art can make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that: It comprises a plate-shaped body, wherein a cooling channel structure is arranged in the plate-shaped body, and the cooling channel structure comprises a channel inlet, a channel outlet and at least one cooling channel connected between the channel inlet and the channel outlet; The cooling channel includes a heat exchange diversion section having at least one level of diversion branches, a heat exchange concentration section having multiple heat exchange channels and a heat exchange concentration section having at least one level of concentration branches. The heat exchange diversion section, the heat exchange concentration section and the heat exchange concentration section are connected in sequence along the flow direction of the cooling medium in the cooling channel. At least one level of the diversion branches can evenly distribute the cooling medium flowing into the cooling channel to multiple heat exchange channels, and at least one level of the concentration branches can converge the cooling medium in multiple heat exchange channels to flow out of the cooling channel.

2. The liquid cooling plate according to claim 1, characterized in that: The cooling channel structure includes a plurality of cooling channels that are spaced apart and arranged side by side. The plurality of cooling channels are connected to the channel inlet through a liquid inlet main channel, and the plurality of cooling channels are connected to the channel outlet through a liquid outlet main channel.

3. The liquid cooling plate according to claim 2, characterized in that: The branch flow channels are multi-level, and the number of the branch flow channels at each level is increased along the flow direction of the cooling medium in the cooling channel.

4. The liquid cooling plate according to claim 3, characterized in that: The flow-collecting branches are multi-stage, and the number of the flow-collecting branches at each stage is arranged to decrease along the flow direction of the cooling medium in the cooling flow channel.

5. The liquid cooling plate according to claim 4, characterized in that: In the direction from the heat exchange diversion section to the heat exchange concentration section, an arc-shaped transition section is formed between the diversion branches at each stage, and the angles between the diversion branches connected to the two ends of the arc-shaped transition section and the tangents of the arc-shaped transition section are no more than 60°.

6. The liquid cooling plate according to claim 5, characterized in that: The flow branch channel and the flow converging branch channel are symmetrically arranged on both sides of the heat exchange concentrated section.

7. The liquid cooling plate according to claim 6, characterized in that: The length of the heat exchange flow channel is greater than the length of the flow branch channels at each level and the flow converging branch channels at each level; the number of the heat exchange flow channels is greater than the number of the flow branch channels at each level and the flow converging branch channels at each level.

8. The liquid cooling plate according to claim 1, characterized in that: Along the flow direction of the cooling medium in the cooling channel, a plurality of spoiler columns are arranged at intervals in the cooling channel.

9. The liquid cooling plate according to claim 1, characterized in that: The plate-shaped body comprises a first plate body and a second plate body that are mated with each other, and the cooling channel structure is arranged on the first plate body and / or the second plate body.

10. The liquid cooling plate according to claim 9, characterized in that: The first plate body is a base plate, the second plate body is a sealing cover plate, and the cooling channel structure is provided on the base plate.

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