Liquid cooling plate and liquid cooling system

Abstract

The application provides a liquid cooling plate and a liquid cooling system. The liquid cooling plate comprises a liquid cooling plate body. The liquid cooling plate body is provided with a cooling flow channel, and an inlet and an outlet arranged at intervals along a first direction. The cooling flow channel comprises an inlet flow channel, an outlet flow channel and a main flow channel. One end of the main flow channel is communicated with the inlet through the inlet flow channel, and the other end of the main flow channel is communicated with the outlet through the outlet flow channel. The main flow channel is symmetrically arranged about a central axis of the liquid cooling plate along a second direction. The first direction is perpendicular to the second direction. The flow of the cooling working medium on both sides of the main flow channel about the central axis of the liquid cooling plate along the second direction is uniform, the flow distribution of the cooling working medium in the flow channels on both sides is ensured to be uniform, and the heat dissipation effect of the two side regions of the liquid cooling plate is good.

Description

Technical Field

[0001] This application relates to the field of liquid cooling technology, and more particularly to a liquid cooling plate and a liquid cooling system. Background Technology

[0002] With the rapid development of science and technology, data centers are widely deployed as the infrastructure for cloud computing, artificial intelligence, and big data processing. To cope with the large amount of heat generated by data center computing, liquid cooling plates are commonly used to dissipate heat from the electronic equipment in the data center. However, the heat dissipation effect of different areas of the liquid cooling plate varies greatly, which can easily lead to localized overheating and poor heat dissipation. Summary of the Invention

[0003] This application provides a liquid cooling plate and a liquid cooling system with good heat dissipation performance.

[0004] This application provides a liquid cooling plate, which includes a liquid cooling plate body; the liquid cooling plate body is provided with cooling channels, and liquid inlets and liquid outlets arranged at intervals along a first direction; The cooling channel includes an inlet channel, an outlet channel, and a main channel; one end of the main channel is connected to the inlet through the inlet channel, and the other end of the main channel is connected to the outlet through the outlet channel. The main flow channel is arranged symmetrically about the central axis of the liquid cooling plate along the second direction; wherein, the first direction is perpendicular to the second direction.

[0005] Furthermore, the liquid cooling plate also includes a microchannel cold plate disposed on a large surface of the liquid cooling plate body; the liquid inlet channel is provided with a first channel opening at a position corresponding to the middle of the microchannel cold plate; The main flow channel includes two first flow channels symmetrically arranged about the central axis of the liquid cooling plate along the second direction. The first flow channels are provided with second flow channel openings, and the second flow channel openings of the two first flow channels are respectively provided on two opposite sides of the microchannel cold plate in the first direction. The liquid inlet is connected to one end of the liquid inlet channel, and the other end of the liquid inlet channel is connected to the middle of the microchannel cold plate through the first channel port. The two sides of the microchannel cold plate are respectively connected to the two first branch channels through the two second channel ports, so that one end of the main channel is connected to the liquid inlet through the liquid inlet channel.

[0006] Furthermore, the microchannel cold plate includes a plurality of shovel teeth extending along the first direction, and the plurality of shovel teeth are evenly spaced and arranged in the second direction.

[0007] Furthermore, the distance between two adjacent shovel teeth in the plurality of shovel teeth is less than 0.2 mm.

[0008] Furthermore, the second flow channel includes a first sidewall and a second sidewall disposed opposite to each other in the first direction; the first flow channel includes a third sidewall and a fourth sidewall disposed opposite to each other in the first direction; The first sidewall is disposed away from the center of the microchannel cold plate compared to the second sidewall, and the third sidewall is disposed away from the center of the microchannel cold plate compared to the fourth sidewall; wherein the first sidewall and the third sidewall are coplanar; and / or, there is a gap between the second sidewall and the fourth sidewall.

[0009] Furthermore, the main flow channel includes a confluence flow channel, a first confluence space, and two first branch flow channels; the two first branch flow channels converge at one end of the confluence flow channel, and the other end of the confluence flow channel is connected to the first confluence space; the depth of the first confluence space is less than the depth of the confluence flow channel and the first branch flow channels.

[0010] Furthermore, the ratio of the depth of the confluence channel to the depth of the first confluence space is 1.5 to 2; and / or, The bottom surface of the first confluence space has a plurality of cylindrical protrusions; the plurality of cylindrical protrusions are evenly spaced along the first direction and the second direction; and / or, The confluence channel includes a first bottom surface and a second bottom surface connected together; the second bottom surface extends obliquely from the first bottom surface toward the first confluence space.

[0011] Furthermore, the main flow channel also includes two second branch channels, one end of which is connected to the first confluence space, and the other end is connected to the liquid outlet through the liquid outlet channel; wherein, the two second branch channels are located on opposite sides of the confluence channel in the first direction.

[0012] Furthermore, the main flow channel also includes a second confluence space, where the other ends of the two second branch channels converge. The second confluence space is connected to the liquid outlet channel and, through the liquid outlet channel, to the liquid outlet. The depth of the second confluence space is less than the depth of the second branch channels; and / or, The second distribution channel includes a main heat dissipation section, a narrowing section, and a connecting section. One end of the connecting section is connected to the first confluence space, and the other end of the connecting section is connected to one end of the narrowing section. The other end of the narrowing section is connected to the main heat dissipation section. The width of the narrowing section is smaller than the width of the main heat dissipation section and the connecting section.

[0013] This application provides a liquid cooling system, including a liquid cooling plate as described in any of the above embodiments.

[0014] The liquid cooling plate provided in this application includes a main body with cooling channels and inlets and outlets spaced apart along a first direction. One end of the main cooling channel is connected to the inlet via the inlet channel, and the other end is connected to the outlet via the outlet channel. The main channels are symmetrically arranged about the central axis of the liquid cooling plate along a second direction, ensuring uniform flow distribution of the cooling medium in the channels on both sides. This significantly reduces the temperature difference between the two sides of the liquid cooling plate, effectively avoiding insufficient cooling in certain areas due to uneven cooling distribution, and resulting in good heat dissipation in the two sides of the liquid cooling plate.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] Figure 1 The figure shown is a perspective view of a liquid cooling plate according to an embodiment of this application; Figure 2 As shown Figure 1 A three-dimensional schematic diagram of the liquid cooling plate from another direction; Figure 3 As shown Figure 1 The diagram shown is a three-dimensional representation of the liquid cooling plate after the top plate of the liquid cooling plate has been removed. Figure 4 As shown Figure 3 A schematic diagram of the liquid cooling plate shown; Figure 5 As shown Figure 1 The diagram shows a three-dimensional schematic of a microchannel cold plate for liquid cooling. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0019] To better understand the technical solution of this application, the liquid cooling plate and liquid cooling system of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments and implementation methods can be combined with each other.

[0020] Figure 1 The figure shown is a perspective view of a liquid cooling plate 10 according to an embodiment of this application. Figure 2 As shown Figure 1 A three-dimensional schematic diagram of the liquid cooling plate 10 from another direction. See also Figure 1 and Figure 2 As shown, this application embodiment provides a liquid cooling plate 10, which is used to mount electronic devices and can realize heat dissipation of electronic devices.

[0021] The electronic device may include a processing unit and at least two power supply units. The processing unit may be a GPU (Graphics Processing Unit) or a CPU (Central Processing Unit), etc., and this application is not limited thereto. The at least two power supply units may be arranged around the processing unit.

[0022] The power supply unit can be used to perform functions such as power voltage conversion, voltage regulation, filtering, and overload protection. The power supply unit is electrically connected to the processing unit to provide power to the processing unit.

[0023] In this embodiment, Figure 1 The image shows the front of the liquid cooling plate 10. Figure 2 The back of the liquid cooling plate 10 is shown, wherein, as shown Figure 2 The central area on the back of the liquid cooling plate 10 shown can be used to set up a processing unit, and the dotted area enclosed by the zigzag frame on the back of the liquid cooling plate 10 can be used to set up a power supply unit.

[0024] The central region on the back of the liquid cooling plate 10 is used to house the processing unit, and the peripheral region on the back of the liquid cooling plate 10 outside the central region is used to house at least two power supply units. The at least two power supply units are arranged symmetrically about the central axis of the liquid cooling plate 10 along the second direction Y.

[0025] Figure 3 As shown Figure 1 The diagram shown is a three-dimensional representation of the liquid cooling plate after the top plate 15 has been removed. (See also...) Figures 1 to 3 As shown, the liquid cooling plate 10 includes a liquid cooling plate body 11. The liquid cooling plate body 11 is provided with cooling channels 12, and liquid inlets 13 and liquid outlets 14 arranged at intervals along a first direction X. In this embodiment, the liquid cooling plate 10 can be made of copper.

[0026] In one embodiment, the liquid cooling plate body 11 includes a liquid cooling plate top plate 15 and a liquid cooling plate bottom plate 16. The liquid cooling plate top plate 15 can be connected to the liquid cooling plate bottom plate 16, wherein the liquid cooling plate top plate 15 can be welded to the top of the liquid cooling plate bottom plate 16. The liquid cooling plate bottom plate 16 has a recessed cooling channel 12. The liquid cooling plate top plate 15 has inlets 13 and outlets 14 arranged at intervals in a first direction X. The inlets 13 are used for the cooling medium to enter the cooling channel 12, and the outlets 14 are used for the cooling medium to exit from the cooling channel 12. The cooling medium can be a fluorinated liquid.

[0027] The liquid cooling plate 10 also includes a liquid inlet connector 17 and a liquid outlet connector 18. The liquid inlet connector 17 is located at the liquid inlet 13, which is used to connect the liquid inlet connector 17 and the cooling channel 12. The liquid outlet connector 18 is located at the liquid outlet 14, which is used to connect the cooling channel 12 and the liquid outlet connector 18.

[0028] Figure 4 As shown Figure 3 A schematic plan view of the liquid cooling plate 10 is shown. (See also: [link to main text]) Figure 4 As shown, the cooling channel 12 includes an inlet channel 19, an outlet channel 20, and a main channel 21. One end of the main channel 21 is connected to the inlet port 13 through the inlet channel 19, and the other end of the main channel 21 is connected to the outlet port 14 through the outlet channel 20.

[0029] The main flow channel 21 is symmetrically arranged about the central axis of the liquid cooling plate 10 along the second direction Y. The first direction X is perpendicular to the second direction Y. The first direction X and the second direction Y are perpendicular to each other in a plane perpendicular to the thickness direction of the liquid cooling plate 10. Figure 4 In the embodiment shown, the first direction X can be the width direction of the liquid cooling plate 10, and the second direction Y can be the length direction of the liquid cooling plate 10.

[0030] The liquid cooling plate 10 provided in this application includes a liquid cooling plate body 11, which is provided with cooling channels 12 and liquid inlets 13 and outlets 14 arranged at intervals along a first direction X. One end of the main channel 21 of the cooling channel 12 is connected to the liquid inlet 13 through the liquid inlet channel 19, and the other end is connected to the liquid outlet 14 through the liquid outlet channel 20. The main channel 21 is symmetrically arranged about the central axis of the liquid cooling plate 10 along the second direction Y, ensuring that the flow rate of the cooling medium in the two channels of the main channel 21 symmetrically arranged about the central axis of the liquid cooling plate 10 along the second direction Y is uniform, and the pressure drop of the two channels is basically the same. This significantly reduces the temperature difference between the two sides of the liquid cooling plate 10 symmetrical about its central axis, effectively avoiding local insufficient cooling caused by uneven cooling distribution, resulting in good heat dissipation in the two sides of the liquid cooling plate 10, without the need for additional simulation analysis of flow rate and flow resistance.

[0031] Figure 5 As shown Figure 1 A three-dimensional schematic diagram of the microchannel cold plate 22 of the liquid cooling plate 10 shown. (See also...) Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment, the liquid cooling plate 10 further includes a microchannel cold plate 22 disposed on the large surface of the liquid cooling plate body 11. The microchannel cold plate 22 may be disposed on the back side of the liquid cooling plate body 11. The large surface of the liquid cooling plate body 11 is a surface perpendicular to the thickness direction of the liquid cooling plate 10.

[0032] The area corresponding to the microchannel cold plate 22 is used to set up the processing unit, and the area of ​​the liquid cooling plate body 11 outside the microchannel cold plate 22 is used to set up the power supply unit.

[0033] The liquid inlet channel 19 is provided with a first flow channel opening 23 at a position corresponding to the middle of the microchannel cold plate 22. In other embodiments, the liquid inlet 13 may be provided directly opposite the first flow channel opening 23. The first flow channel opening 23 is used to connect the liquid inlet channel 19 and the microchannel cold plate 22. A gap may exist between the bottom surface of the liquid inlet channel 19 and the side surface of the microchannel cold plate 22 near the liquid cooling plate body 11 in the thickness direction of the liquid cooling plate 10.

[0034] The main flow channel 21 includes two first branch channels 24 symmetrically arranged about the central axis of the liquid cooling plate 10 along the second direction Y. Each first branch channel 24 is provided with a second flow channel opening 25. The second flow channel opening 25 connects the microchannel cooling plate 22 and the main flow channel 21. The second flow channel opening 25 extends along the second direction Y. The length of the second flow channel opening 25 in the extending direction is not greater than the dimension of the microchannel cooling plate 22 in the second direction Y. In this embodiment, the length of the second flow channel opening 25 in the extending direction is equal to the dimension of the microchannel cooling plate 22 in the second direction Y.

[0035] The width of the second flow channel 25 in the first direction X can be less than the width of the first flow channel 24 in the first direction X. In this embodiment, the width of the second flow channel 25 in the first direction X can be equal to half the width of the first flow channel 24 in the first direction X.

[0036] The second flow channel openings 25 of the two first flow channels 24 are respectively set on the two opposite sides of the microchannel cold plate 22 in the first direction X.

[0037] The inlet 13 is connected to one end of the inlet channel 19, and the other end of the inlet channel 19 is connected to the middle of the microchannel cold plate 22 through the first channel port 23. The two sides of the microchannel cold plate 22 are connected to the two first branch channels 24 through the two second channel ports 25 respectively, so that one end of the main channel 21 is connected to the inlet 13 through the inlet channel 19.

[0038] The cooling medium can enter the inlet channel 19 through the inlet 13, flow into the middle of the microchannel cold plate 22 through the first channel port 23, and after flowing through the microchannel cold plate 22, it enters the two first branch channels 24 from the two sides of the microchannel cold plate 22 through the two second channel ports 25 respectively, so that the flow rate of the cooling medium entering the two first branch channels 24 is close or the same.

[0039] Because the processing unit generates a high amount of heat, while the power supply units surrounding the processing unit generate a low amount of heat, the microchannel cold plate 22 can effectively dissipate heat from the processing unit. Simultaneously, the cooling medium, after entering through the inlet 13, can flow through the microchannel cold plate 22 to various destinations. Figure 4 As shown, the two first diversion channels 24 are symmetrically arranged about the central axis of the liquid cooling plate 10 along the second direction Y, so that the flow rate of the cooling medium on the left and right sides is uniform, the difference in heat dissipation effect between the left and right sides is small, and the heat dissipation effect is good.

[0040] See also Figure 5 As shown, in one embodiment, the microchannel cold plate 22 includes a plurality of shovel teeth 26 extending along a first direction X, and the plurality of shovel teeth 26 are evenly spaced along a second direction Y. This ensures that the cooling medium can flow along the gaps between adjacent shovel teeth 26 and from the center of the microchannel cold plate 22 to the two sides of the microchannel cold plate 22, thereby achieving effective heat dissipation of the processing unit.

[0041] In one embodiment, the distance between two adjacent teeth 26 in the plurality of teeth 26 is less than 0.2 mm. Preferably, the distance between two adjacent teeth 26 in the plurality of teeth 26 is 0.15 mm. In this way, the heat dissipation effect of the processing unit is good.

[0042] See Figure 3 and Figure 4 As shown, in one embodiment, the second flow channel 25 includes a first sidewall 27 and a second sidewall 28 disposed opposite to each other in the first direction X. The first flow channel 24 includes a third sidewall 29 and a fourth sidewall 30 disposed opposite to each other in the first direction X.

[0043] The first sidewall 27 is positioned further away from the center of the microchannel cold plate 22 than the second sidewall 28, and the third sidewall 29 is positioned further away from the center of the microchannel cold plate 22 than the fourth sidewall 30. The first sidewall 27 and the third sidewall 29 are coplanar. This allows the cooling medium to flow in the same direction.

[0044] In one embodiment, a gap exists between the second sidewall 28 and the fourth sidewall 30, creating a flow space for the cooling medium between them. This reduces impedance and prevents the cooling medium from concentrating at one end of the second flow channel 25 along the second direction Y. Figure 4 Below the second flow channel 25 shown, uniform distribution of the cooling medium is ensured.

[0045] In one embodiment, the main flow channel 21 further includes a confluence flow channel 31 and a first confluence space 32. Two first branch channels 24 converge at one end of the confluence flow channel 31, and the other end of the confluence flow channel 31 is connected to the first confluence space 32. Here, "connection" as used herein can refer to a direct connection and mutual communication between the two. The depth of the first confluence space 32 is less than the depth of both the confluence flow channel 31 and the first branch channels 24. Specifically, the depth of the first confluence space 32 is less than both the depth of the confluence flow channel 31 and the depth of the first branch channels 24. However, the depth of the confluence flow channel 31 and the depth of the first branch channels 24 can be equal.

[0046] The area corresponding to the first busbar space 32 of the liquid cooling plate body 11 is used to house multiple power supply units. The size of the first busbar space 32 can be set relatively large to cover multiple power supply units for heat dissipation. The first busbar space 32 can be a rectangular recess extending along both the first direction X and the second direction Y. The length of the first busbar space 32 in the first direction X is greater than half the length of the liquid cooling plate body 11 in the first direction X.

[0047] The depth of the first confluence space 32 is less than the depth of the confluence channel 31 and the first branch channel 24. This can maintain the flow rate of the cooling medium entering the first confluence space 32 and prevent the flow rate from decreasing due to the large size of the first confluence space 32, thereby improving the heat dissipation effect of multiple power supply units.

[0048] In one embodiment, the ratio of the depth of the confluence channel 31 to the depth of the first confluence space 32 is 1.5 to 2. This prevents excessive resistance at the inlet of the first confluence space 32 while ensuring the flow rate of the cooling medium, thereby guaranteeing the heat dissipation effect.

[0049] In one embodiment, the merging channel 31 includes a first bottom surface 33 and a second bottom surface 34 connected together. The second bottom surface 34 connects the bottom surface of the first merging space 32 and the first bottom surface 33. The second bottom surface 34 extends obliquely from the first bottom surface 33 toward the first merging space 32. By using the obliquely extending second bottom surface 34, the depth of the first merging space 32 can be less than the depth of the merging channel 31 and the first branching channel 24, which is a simple implementation method.

[0050] In one embodiment, the bottom surface of the first busbar space 32 is provided with a plurality of cylindrical protrusions 35. The plurality of cylindrical protrusions 35 are evenly spaced along the first direction X and the second direction Y. The provision of a plurality of cylindrical protrusions 35 in the first busbar space 32 can enhance heat dissipation, thereby improving the heat dissipation effect of the multiple power supply units.

[0051] The height of the multiple cylindrical protrusions 35 can be equal to the depth of the first confluence space 32, so that the multiple cylindrical protrusions 35 can support the top plate 15 of the cold plate and improve the structural strength of the liquid cooling plate 10.

[0052] In one embodiment, downstream of the second flow channel 25, the flow width of the first branch channel 24 narrows and then expands before converging into the converging flow channel 31.

[0053] In one embodiment, the main flow channel 21 further includes two second branch channels 36, wherein the depth of the second branch channels 36 may be equal to the depth of the first branch channel 24. One end of each of the two second branch channels 36 is connected to the first confluence space 32, and the other end is connected to the outlet 14 via the outlet flow channel 20. The two second branch channels 36 are located on opposite sides of the confluence channel 31 in the first direction X. This arrangement of the two second branch channels 36 is more rational, ensuring that the flow rates of the cooling medium flowing into the two second branch channels 36 are close or the same.

[0054] In this embodiment, in the first direction X, the two second diversion channels 36 are located outside the two first diversion channels 24.

[0055] In one embodiment, the second distribution channel 36 includes a main heat dissipation section 37, a narrowing section 38, and a connecting section 39, wherein the liquid cooling plate body 11 is used to house at least one power supply unit in the area corresponding to the main heat dissipation section 37.

[0056] One end of the connecting segment 39 is connected to the first busbar space 32, and the other end of the connecting segment 39 is connected to one end of the narrowing segment 38, which in turn is connected to the main heat dissipation segment 37. The narrowing segment 38 connects the connecting segment 39 and the main heat dissipation segment 37. The width of the narrowing segment 38 is smaller than the widths of the main heat dissipation segment 37 and the connecting segment 39.

[0057] Thus, the second flow channel 36 can be adapted to the shape of the liquid cooling plate 10. At the same time, the narrow section 38 is narrower, which increases the flow rate of the cooling medium flowing through the narrow section 38, and makes the flow rate of the cooling medium entering the main heat dissipation section 37 faster, ensuring the heat dissipation effect of the power supply unit located in the main heat dissipation section 37, and realizing the effective heat dissipation of the power supply unit.

[0058] In one embodiment, the main flow channel 21 further includes a second confluence space 40, wherein the first confluence space 32 and the second confluence space 40 are located on opposite sides of the liquid cooling plate body 11 along the second direction Y.

[0059] One end of each of the two second branch channels 36 is connected to the first confluence space 32, and the other ends of the two second branch channels 36 converge into a second confluence space 40. The second confluence space 40 is connected to the liquid outlet channel 20 and, through the liquid outlet channel 20, to the liquid outlet 14, so that the other end of the main flow channel 21 is connected to the liquid outlet 14 through the liquid outlet channel 20. The depth of the second confluence space 40 is less than the depth of the second branch channels 36.

[0060] The area corresponding to the second manifold space 40 of the liquid cooling plate body 11 is used to house multiple power supply units. The size of the second manifold space 40 can be set relatively large to cover multiple power supply units and facilitate their heat dissipation. The second manifold space 40 can be a rectangular recess extending along both the first direction X and the second direction Y. The length of the second manifold space 40 in the first direction X can be greater than one-third of the length of the liquid cooling plate body 11 in the first direction X. This maintains the flow rate of the cooling medium entering the second manifold space 40, preventing a decrease in flow rate due to the larger size of the second manifold space 40, thus ensuring good heat dissipation for the multiple power supply units.

[0061] The length of the first merging space 32 in the first direction X can be greater than the length of the second merging space 40 in the first direction X. Furthermore, the depth of the first merging space 32 can be equal to the depth of the second merging space 40.

[0062] In one embodiment, the ratio of the depth of the second branch channel 36 to the depth of the second confluence space 40 is 1.5 to 2. This prevents excessive resistance at the inlet of the second confluence space 40 while ensuring the flow rate of the cooling medium, thereby guaranteeing the heat dissipation effect.

[0063] This application provides a liquid cooling system, which includes a liquid cooling plate. The liquid cooling system may include at least one liquid cooling plate. It should be noted that the descriptions of the liquid cooling plate in the above embodiments and implementations are also applicable to the liquid cooling system of this application.

[0064] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate includes a liquid cooling plate body; the liquid cooling plate body is provided with cooling channels, and liquid inlets and liquid outlets arranged at intervals along a first direction; The cooling channel includes an inlet channel, an outlet channel, and a main channel; one end of the main channel is connected to the inlet through the inlet channel, and the other end of the main channel is connected to the outlet through the outlet channel. The main flow channel is arranged symmetrically about the central axis of the liquid cooling plate along the second direction; wherein, the first direction is perpendicular to the second direction.

2. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate also includes a microchannel cooling plate disposed on a large surface of the liquid cooling plate body; the liquid inlet channel is provided with a first channel opening at a position corresponding to the middle of the microchannel cooling plate; The main flow channel includes two first flow channels symmetrically arranged about the central axis of the liquid cooling plate along the second direction. The first flow channels are provided with second flow channel openings, and the second flow channel openings of the two first flow channels are respectively provided on two opposite sides of the microchannel cold plate in the first direction. The liquid inlet is connected to one end of the liquid inlet channel, and the other end of the liquid inlet channel is connected to the middle of the microchannel cold plate through the first channel port. The two sides of the microchannel cold plate are respectively connected to the two first branch channels through the two second channel ports, so that one end of the main channel is connected to the liquid inlet through the liquid inlet channel.

3. The liquid cooling plate according to claim 2, characterized in that, The microchannel cold plate includes a plurality of shovel teeth extending along the first direction, and the plurality of shovel teeth are evenly spaced and arranged in the second direction.

4. The liquid cooling plate according to claim 3, characterized in that, The distance between two adjacent shovel teeth in the plurality of shovel teeth is less than 0.2 mm.

5. The liquid cooling plate according to claim 2, characterized in that, The second flow channel includes a first sidewall and a second sidewall disposed opposite to each other in the first direction; the first flow channel includes a third sidewall and a fourth sidewall disposed opposite to each other in the first direction; The first sidewall is disposed away from the center of the microchannel cold plate compared to the second sidewall, and the third sidewall is disposed away from the center of the microchannel cold plate compared to the fourth sidewall; wherein the first sidewall and the third sidewall are coplanar; and / or, there is a gap between the second sidewall and the fourth sidewall.

6. The liquid cooling plate according to claim 1, characterized in that, The main flow channel includes a confluence flow channel, a first confluence space, and two first branch flow channels; the two first branch flow channels converge at one end of the confluence flow channel, and the other end of the confluence flow channel is connected to the first confluence space; the depth of the first confluence space is less than the depth of the confluence flow channel and the first branch flow channels.

7. The liquid cooling plate according to claim 6, characterized in that, The ratio of the depth of the confluence channel to the depth of the first confluence space is 1.5 to 2; and / or, The bottom surface of the first confluence space has a plurality of cylindrical protrusions; the plurality of cylindrical protrusions are evenly spaced along the first direction and the second direction; and / or, The confluence channel includes a first bottom surface and a second bottom surface connected together; the second bottom surface extends obliquely from the first bottom surface toward the first confluence space.

8. The liquid cooling plate according to claim 6, characterized in that, The main flow channel further includes two second branch channels, one end of which is connected to the first confluence space, and the other end is connected to the liquid outlet through the liquid outlet channel; wherein, the two second branch channels are located on opposite sides of the confluence channel in the first direction.

9. The liquid cooling plate according to claim 8, characterized in that, The main flow channel further includes a second confluence space, where the other ends of the two second branch channels converge. The second confluence space is connected to the liquid outlet channel and, through the liquid outlet channel, to the liquid outlet. The depth of the second confluence space is less than the depth of the second branch channels; and / or, The second distribution channel includes a main heat dissipation section, a narrowing section, and a connecting section. One end of the connecting section is connected to the first confluence space, and the other end of the connecting section is connected to one end of the narrowing section. The other end of the narrowing section is connected to the main heat dissipation section. The width of the narrowing section is smaller than the width of the main heat dissipation section and the connecting section.

10. A liquid cooling system, characterized in that, Including the liquid cooling plate as described in any one of claims 1-9.

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