Liquid-cooling flow distribution structure and cold head using liquid-cooling flow distribution structure

Abstract

Disclosed in the present invention are a liquid-cooling flow distribution structure and a cold head using a liquid-cooling flow distribution structure. The liquid-cooling flow distribution structure comprises a base and a flow distribution plate, wherein the bottom surface of the base is configured to be mounted on a heating source in a fitting manner, and is configured to transfer heat from the heating source; the top surface of the base comprises a heat exchange recess; a heat exchange fin group is provided on the bottom surface of the heat exchange recess; and the flow distribution plate is arranged on the base, and comprises a liquid distribution cavity, a heat exchange cavity and at least one flow distribution channel, the liquid distribution cavity and the heat exchange cavity being vertically arranged, the at least one flow distribution channel being in communication with the liquid distribution cavity and the heat exchange cavity and being located therebetween, the heat exchange cavity being configured to be in butt joint with the heat exchange recess, the heat exchange fin group being contained in the heat exchange cavity, the heat exchange cavity and the heat exchange fin group constituting a heat exchange structure, and the position of the at least one flow distribution channel matching that of a heating core part of the heat exchange fin group. Therefore, the coolant flow in a heat exchange region above a heating core can be increased, thereby enhancing the heat exchange in the region; and the flow in regions of different temperatures can be adjusted.

Description

Liquid cooling shunt structure and cold head using the same

[0001] Technical Field

[0002] The present invention relates to the field of heat dissipation of electronic equipment, and in particular to a liquid cooling shunt structure and a cold head using the liquid cooling shunt structure. Background Art

[0003] The working principle of the liquid cooling radiator is: under the action of the pump, the cold liquid flows to bring the heat from the heat exchange area to the heat dissipation radiator, and the heat is dissipated into the air through forced convection by the fan. The cooled cold liquid returns to the heat exchange area to absorb heat, and the cycle continues.

[0004] The flow and heat transfer within the cold head have a significant impact on the performance and operating state of the entire system. The conventional cold head structure is shown in Figure 1 and primarily comprises a cover 1, a rubber pad 2, a baffle 3, a shell 4, a metal sheet 5, a diverter plate 6, and a base 7.

[0005] Improving the performance of liquid cooling radiators is a goal that researchers in this industry and technology have always pursued. The problems with existing technologies mainly lie in three aspects:

[0006] (1) As shown in FIG1 , the diversion structure (diversion plate 6) cannot guide the cooled cold liquid directly to the top of multiple heat-generating core areas. Therefore, the cold liquid that exchanges heat with the hottest area has a high temperature and a slow flow rate, resulting in a high temperature of the heat-generating core and poor overall performance of the system or product.

[0007] (2) As shown in Figure 1, the conventional heat exchange zone structure cannot distribute the flow to areas with different thermal powers when dealing with application scenarios where the thermal power of the heat-generating core is unevenly distributed, resulting in overheating in areas with high thermal power, and unable to ensure the efficient operation of each area of ​​the system, resulting in poor overall performance of the system or product.

[0008] (3) As shown in Figure 1, the conventional cold head structure needs to design two sets of solutions and products to achieve their respective optimal performance when dealing with different heat source scenarios (for example, Intel and AMD are different). Correspondingly, each component in Figure 1 requires two sets of materials. For enterprises, the production cost is high and the economic benefits are poor.

[0009] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0010] The purpose of the present invention is to provide a liquid cooling diversion structure, which can, on the one hand, increase the cooling liquid flow in the heat exchange area above the heating core and enhance the heat exchange in this area; on the other hand, it can adjust the flow in areas with different temperature distributions.

[0011] Another object of the present invention is to provide a cold head including the above-mentioned liquid cooling diversion structure.

[0012] To achieve the above-mentioned objectives, the present invention provides a liquid-cooled diversion structure, including a base and a diversion plate; the bottom surface of the base is used to be installed in contact with the heat source and to transfer the heat of the heat source, the top surface of the base includes a heat exchange groove, and a heat exchange fin group is provided at the bottom surface of the heat exchange groove; the diversion plate is arranged on the base, and the diversion plate includes a liquid separation chamber, a heat exchange chamber and at least one diversion channel; the liquid separation chamber is arranged at the upper part of the diversion plate; the heat exchange chamber is arranged at the lower part of the diversion plate, and the heat exchange chamber is buckled on the heat exchange fin group; wherein the liquid separation chamber and the heat exchange chamber are arranged in an upper and lower structure; at least one diversion channel is connected between the liquid separation chamber and the heat exchange chamber; wherein the heat exchange chamber is used to dock with the heat exchange groove, the heat exchange fin group is accommodated in the heat exchange chamber, and the heat exchange chamber and the heat exchange fin group constitute a heat exchange structure; wherein the position of at least one diversion channel matches the position of the heating core part of the heat exchange fin group.

[0013] In a preferred embodiment, the heat exchange fin group is a plurality of fins extending upward from the bottom surface of the heat exchange tank and perpendicular to the bottom surface of the heat exchange tank and arranged parallel to each other, and a microchannel exists between every two fins.

[0014] In a preferred embodiment, the length direction of at least one diversion channel is perpendicular to the direction of the microchannels of the heat exchange fin group.

[0015] In a preferred embodiment, the heat exchange fin group includes at least one spacing channel perpendicular to the microchannel.

[0016] In a preferred embodiment, a partition plate is provided in the spacing groove, which extends vertically upward from the bottom surface of the spacing groove and vertically abuts the top surface of the heat exchange groove. At least one partition plate divides the heat exchange fin group into at least two heat exchange fin group areas.

[0017] In a preferred embodiment, a partition plate is provided in the spacing groove, which extends vertically downward from the top surface of the heat exchange cavity and vertically abuts the bottom surface of the spacing groove. At least one partition plate divides the heat exchange fin group into at least two heat exchange fin group areas.

[0018] In a preferred embodiment, each heat exchange fin group area corresponds to a heat generating core portion.

[0019] In a preferred embodiment, the number of the at least one flow diversion channel corresponds to the number of the heat exchange fin group areas.

[0020] In a preferred embodiment, the liquid cooling diversion structure also includes a plurality of liquid collection channels, which are respectively arranged between the opening on one side of the microchannel of the heat exchange fin group area and the side wall of the heat exchange groove and between the opening on the other side of the microchannel of the heat exchange fin group area and the partition plate.

[0021] In a preferred embodiment, the liquid cooling flow distribution structure further includes a lateral liquid collecting channel, which is provided between the outer side wall of the heat exchange fin group and the side wall of the heat exchange tank.

[0022] In a preferred embodiment, the diversion channel further includes at least one expansion area, the at least one expansion area faces a heat-generating core portion, and the shape of the at least one expansion area is circular, elliptical or polygonal.

[0023] To achieve the above-mentioned other object, the present invention further provides a cold head, which includes the above-mentioned liquid cooling shunt structure.

[0024] Compared with the prior art, the liquid cooling shunt structure of the present invention and the cold head using the liquid cooling shunt structure have the following beneficial effects: when this solution is used in application scenarios with multiple heat-generating cores (such as AMD or servers), the shunt structure of this technology can directly guide the cooled cold liquid to the top of multiple heat-generating core areas, so that the temperature of the cold liquid exchanging heat with the hottest area is low and the flow rate is fast; under the action of impact, the cold liquid penetrates into the root of the fins, quickly takes away the heat from the high-temperature area, and improves the overall performance of the system or product; when dealing with application scenarios with uneven distribution of heat power of the heat-generating core, this technology can distribute the flow to areas with different heat power to prevent high heat power from Overheating occurs in certain areas, ensuring efficient operation of various areas of the system and improving the overall performance of the system or product; when dealing with different heat source scenarios (for example, Intel and AMD are different), this technology can simply and conveniently achieve high performance requirements in different scenarios compared to existing technologies; reduce the types of materials, reduce the company's production costs, and improve economic benefits; the upper heat exchange cavity in the diverter plate is set as an upper and lower stacking structure, which is conducive to adjusting only the position or distribution of the diverter channel while keeping the liquid inlet channel unchanged, which can meet the heat exchange requirements when dealing with application scenarios with multiple heating cores or application scenarios with uneven distribution of thermal power of heating cores, as well as different heat source scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a three-dimensional exploded structure of a liquid cooling diversion structure according to an embodiment of the prior art;

[0026] FIG2 is a schematic diagram of a three-dimensional exploded structure of a liquid-cooling diversion structure according to an embodiment of the present invention;

[0027] FIG3 is a schematic diagram of the three-dimensional structure of a liquid cooling diversion structure according to an embodiment of the present invention;

[0028] FIG4 is a schematic diagram of the three-dimensional structure of a diverter plate according to an embodiment of the present invention;

[0029] FIG5 is a schematic diagram of a three-dimensional structure of a base according to an embodiment of the present invention;

[0030] FIG6 is a schematic top view of a liquid cooling diversion structure according to an embodiment of the present invention;

[0031] FIG7 is a schematic cross-sectional view of the structure at point AA in FIG6;

[0032] FIG8 is a schematic cross-sectional view of the structure at point B-B in FIG7 ;

[0033] FIG9 is a schematic front view of the cooling liquid flow direction of the liquid cooling diversion structure according to one embodiment of the present invention;

[0034] FIG10 is a schematic top view of the cooling liquid flow direction of the liquid cooling diversion structure according to one embodiment of the present invention;

[0035] FIG11 is a schematic diagram of a three-dimensional structure of a liquid-cooling diversion structure according to another embodiment of the present invention;

[0036] FIG12 is a schematic diagram of a three-dimensional exploded structure of a liquid-cooling diversion structure according to another embodiment of the present invention;

[0037] 13 is a schematic top cross-sectional view of a liquid cooling diversion structure according to another embodiment of the present invention;

[0038] FIG14 is a schematic cross-sectional view of the structure at C-C in FIG13;

[0039] FIG15 is a schematic cross-sectional view of the structure at point D-D in FIG13;

[0040] FIG16 is a schematic front view of the cooling liquid flow direction of the liquid cooling diversion structure according to another embodiment of the present invention;

[0041] FIG17 is a schematic side view of the structure of a heat exchange fin group according to another embodiment of the present invention.

[0042] Description of main reference numerals:

[0043] 1-cover, 2-rubber pad, 3-water baffle, 4-shell, 401-water inlet, 402-water outlet, 5-metal sheet, 6-diverter plate, 601-liquid inlet channel, 602-liquid outlet channel, 6021-first liquid outlet channel, 6022-second liquid outlet channel, 603-liquid separation chamber, 604-heat exchange chamber, 605-diverter channel, 6051-flow expansion area, 7-base, 701-heat exchange groove, 702-heat exchange fin group, 7021-first liquid collecting channel, 7022-second liquid collecting channel, 7023-third liquid collecting channel, 7024-fourth liquid collecting channel, 7025, 7026-lateral liquid collecting channels, , 7027-interval channel, 703-partition plate, 8-heat source cover, 9-heating core. DETAILED DESCRIPTION

[0044] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0045] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations such as "include" or "comprising", etc., will be understood to include the stated elements or components but not to exclude other elements or other components.

[0046] As shown in Figures 2 to 5, a liquid-cooled diversion structure according to a preferred embodiment of the present invention mainly includes a base 7 and a diversion plate 6; the bottom surface of the base 7 is used to fit with the heat source and to transfer the heat of the heat source, the top surface of the base 7 includes a heat exchange groove 701, and a heat exchange fin group 702 is provided at the bottom surface of the heat exchange groove 701; the diversion plate 6 is arranged on the base 7, and the diversion plate 6 includes a liquid separation chamber 603 and a heat exchange chamber 604 and at least one diversion channel 605; the liquid separation chamber 603 and the heat exchange chamber 604 are arranged in an upper and lower structure; at least one diversion channel 605 is connected between the liquid separation chamber 603 and the heat exchange chamber 604; the heat exchange chamber 604 is used to dock with the heat exchange groove 701, the heat exchange fin group 702 is accommodated in the heat exchange chamber 604, and the heat exchange chamber 604 and the heat exchange fin group 702 constitute a heat exchange structure; the position of at least one diversion channel 605 matches the position of the heating core part 9 of the heat exchange fin group 702.

[0047] As shown in Figures 2-5, the heat exchange fin group 702 includes at least one spacing groove 7027 perpendicular to the microchannel, and at least one partition plate 703 divides the heat exchange fin group 702 into at least two heat exchange fin group areas, such as, for example but not limited to, a first heat exchange fin group, a second heat exchange fin group, etc.

[0048] The partition plate 703 is integrally arranged with the diverter plate 7, which extends vertically downward from the top surface of the heat exchange chamber and vertically abuts against the bottom surface of the spacing groove 7027; the partition plate 703 can also be integrally arranged with the base 7, extending vertically upward from the bottom surface of the spacing groove 7027 and vertically abuts against the bottom surface of the diverter plate 7.

[0049] As shown in Figures 6 to 10, in some embodiments, the top surface of the diverter plate 6 is provided with a liquid inlet channel 601, and liquid outlet channels 602 are provided on both sides thereof, which are connected to the heat exchange groove 701. The liquid inlet channel 601 is connected to the liquid separation chamber 603. The cold liquid enters the liquid separation chamber 603 through the liquid inlet channel 601, and then enters the heat exchange chamber 604 through the diverter channel 605. The heat exchange chamber 604 is provided with a first liquid outlet channel 6021 and a second liquid outlet channel 6022 at both ends. The first liquid outlet channel 6021 and the second liquid outlet channel 6022 are connected to the heat exchange chamber 604 (or the heat exchange chamber). The other ends of the first liquid outlet channel 6021 and the second liquid outlet channel 6022 are connected to the water outlet 402 of the housing.

[0050] 7 and 8 , in some embodiments, the heat exchange chamber 604 is buckled at the heat exchange groove 701 and forms a heat exchange structure with the heat exchange groove 701 and the heat exchange fin group 702 . The entire heat exchange fin group 702 is accommodated inside the heat exchange chamber.

[0051] In some embodiments, the heat exchange fin assembly 702 is composed of a plurality of fins extending upward from the bottom surface of the heat exchange tank 701. The fins are arranged perpendicularly and parallel to the bottom surface of the heat exchange tank 701. The plurality of fins are integrally connected to the bottom surface of the heat exchange tank 701, and a microchannel exists between every two fins. The length direction of at least one diversion channel 605 is arranged perpendicular to the direction of the microchannel of the heat exchange fin assembly 702.

[0052] In some embodiments, the base 7 further includes at least one partition plate 703, which extends upward from the bottom surface of the heat exchange tank 701 and is disposed perpendicularly to the bottom surface of the heat exchange tank 701 and the microchannels of the heat exchange fin group 702. The partition plate 703 is integrally connected to the bottom surface of the heat exchange tank 701 (the partition plate can also be disposed on the top surface of the heat exchange cavity, but is preferably disposed on the base, which is more conducive to heat exchange). The at least one partition plate 703 divides the heat exchange fin group 702 into at least two heat exchange fin group areas. Each heat exchange fin group area corresponds to a heat generating core 9. The number of the at least one diversion channel 605 corresponds to the number of heat exchange fin group areas.

[0053] In some embodiments, in principle, the top surface of the heat exchange chamber 604 is attached to the top of the heat exchange fin group 702 and the top of the partition plate 703. That is, after the cold liquid directly enters the microchannel of the heat exchange fin group 702 from the diversion channel 605, it can only flow along the horizontal direction of the microchannel, and the cold liquid fully exchanges heat with the fins and the bottom of the microchannel.

[0054] In some embodiments, the liquid cooling diversion structure further includes a plurality of liquid collection channels, which are respectively arranged between the microchannel side openings of the heat exchange fin group area and the side walls of the heat exchange groove 701 and between the microchannel side openings of the heat exchange fin group area and the partition plate 703.

[0055] In some embodiments, the liquid cooling flow distribution structure further includes lateral liquid collecting channels 7025 and 7026 . The lateral liquid collecting channels 7025 and 7026 are disposed between the outer side wall of the heat exchange fin group 702 and the side wall of the heat exchange tank 701 .

[0056] Please refer to Figures 9 and 10. In some embodiments, the direction of the cold liquid in this embodiment is shown by the arrows in the figures. The cold liquid enters the liquid separation chamber 603 from the liquid inlet channel 601, and then enters the microchannel of the heat exchange fin group 702 below it from the diversion channel 605. Then, the cold liquid flows along the horizontal direction of the microchannel. A part of it enters the first liquid collecting channel 7021 and the second liquid collecting channel 7022 from one end of the microchannel, and finally flows out from the first liquid outlet channel 6021 and the second liquid outlet channel 6022 of the diversion plate 6. Another part of the cold liquid flows in the other direction along the microchannels of the heat exchange fin group 702 into the third liquid collecting channel 7023 and the fourth liquid collecting channel 7024 formed between the heat exchange fin group 702 and the partition plate 703, and then enters the lateral liquid collecting channels 7025 and 7026 between the side walls of the heat exchange fin group 702 and the side walls of the heat exchange tank 701 from both sides of the third liquid collecting channel 7023 and the fourth liquid collecting channel 7024, and finally converges into the first liquid collecting channel 7021 and the second liquid collecting channel 7022, and finally flows out from the first liquid outlet channel 6021 and the second liquid outlet channel 6022 of the diverter plate 6.

[0057] Referring to FIG8 , in some embodiments, the diversion channel 605 further includes at least one expansion area 6051, at least one expansion area 6051 directly facing a heating core 9, and at least one expansion area 6051 is circular, elliptical, or polygonal in shape. In actual operation, each heating core 9 also has a corresponding heating core area where heat is most concentrated. The heat generated there is the most concentrated, the heat output is the highest, and the temperature is the highest. Therefore, the heating core area requires the largest amount of cooling liquid flow. The setting of the expansion area 6051 can just meet this requirement. The expansion area 6051 can directly face the heating core area, increase the flow of cooling liquid there, and allow a large amount of cooling liquid to directly flush the heating core area, thereby increasing heat exchange there and promoting a temperature reduction in the heating core area.

[0058] As shown in Figures 11 to 16, in some embodiments, the distribution of the heating core areas is not the same. For example, in the embodiment of Figure 8, its heating core area is biased towards one side of the heat exchange fin group 702'. Therefore, the two diverter channels 605' of the embodiment of Figure 8 are respectively arranged above the two heat exchange fin group areas, and a corresponding expansion area 6051' is added at the position of each diverter channel 605' located at the heating core area. Unlike the embodiment of Figure 8, the two heating core areas of the embodiment of Figure 13 are distributed at one end of the heat exchange fin group 702. Therefore, the diverter channel 605' of this embodiment is only arranged above the two heating core areas, and one diverter channel 605' runs through the two heating core areas, and expansion areas 6051' are added to the positions of the two heating core areas on one diverter channel 605'. Referring to Figures 11 and 12, this embodiment can also be imagined as rotating the diverter plate 6 and the base 7 of the embodiment of Figure 8 by 90 degrees.

[0059] Please refer to Figure 16. In some embodiments, the direction of the cold liquid in this embodiment is shown by the arrow direction in Figure 16. After the cold liquid enters the liquid separation chamber 603 from the liquid inlet channel 601, it enters the microchannel of the heat exchange fin group 702' of the heat exchange chamber 604 through the diversion channel 605'. The cold liquid flows along the direction of the microchannel. A part of the cold liquid enters the first liquid collecting channel 7021 from one end of the microchannel and then flows out from the first liquid outlet channel 6021; the other part of the cold liquid enters the second liquid collecting channel 7022 from the other end of the microchannel and then flows out from the second liquid outlet channel 6022. It is worth noting that in the embodiments shown in Figures 11 to 16, the partition plate 703 may not be provided. Since the heating core area is biased toward one end of the heat exchange fin group 702', and since the first collecting channel 7021 close to one end of the heating core area is closer, the flow rate and flow of the cold liquid flowing to the first collecting channel 7021 are relatively large, which can just take away more heat from the heating core area. The second collecting channel 7022 is farther away from the heating core area, so the flow rate and flow direction of the cold liquid flowing to the second collecting channel 7022 are relatively small, which just conforms to the principle that there is no heating core area at this end and less heat needs to be taken away.

[0060] As shown in Figure 17, in some embodiments, the height of the heat exchange fin group 702" can be set to be variable, for example, but not limited to, the part of the heat exchange fin group 702" facing the diverter channel 605 is flush with the top surface of the heat exchange cavity, or can penetrate into a part of the diverter channel 605, and then the height of the heat exchange fin group 702" gradually decreases from both sides of the diverter channel 605 to the outside. The shape of the top side of the heat exchange fin group 702" can be trapezoidal, triangular or arc-shaped, etc. Such a structure can also adapt to heat dissipation.

[0061] Please refer to Figures 2 to 3 and Figures 11 and 12. In order to achieve the other purpose mentioned above, the present invention also provides a cold head, which includes the liquid cooling diversion structure as mentioned above and a cover body 1, a rubber pad 2, a water baffle 3, a shell 4, a metal sheet 5, a diversion plate 6, a base 7, etc., wherein the bottom surface of the base 7 is used for fitting the heating core 9 for installation, and the heating core 9 is generally fitted with a heat source cover 8, and the shell is provided with a water inlet 401 and a water outlet 402, which are used to connect with a circulation pump to drive the in and out circulation of the cooling liquid.

[0062] In summary, the liquid cooling shunt structure of the present invention and the cold head using the liquid cooling shunt structure have the following advantages: when this solution is used in application scenarios with multiple heat-generating cores (such as AMD or servers), the shunt structure of this technology can directly guide the cooled cold liquid to the top of multiple heat-generating core areas, so that the temperature of the cold liquid for heat exchange with the hottest area is low and the flow rate is fast; and under the action of impact, the cold liquid penetrates into the root of the fins, quickly taking away the heat from the high-temperature area, thereby improving the overall performance of the system or product; when dealing with application scenarios with uneven distribution of heat power of the heat-generating core, this technology can distribute the flow to areas with different heat power to prevent areas with high heat power from Overheating occurs, ensuring efficient operation of all areas of the system and improving the overall performance of the system or product; when dealing with different heat source scenarios (for example, Intel and AMD are different), this technology can simply and conveniently achieve high performance requirements in different scenarios compared to existing technologies; reduce the types of materials, reduce the company's production costs, and improve economic benefits; the upper heat exchange cavity in the diverter plate is set as an upper and lower stacking structure, which is conducive to adjusting only the position or distribution of the diverter channel while keeping the liquid inlet channel unchanged, which can meet the heat exchange requirements when dealing with application scenarios with multiple heating cores or application scenarios with uneven distribution of thermal power of heating cores, as well as different heat source scenarios.

[0063] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to realize and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A liquid cooling shunt structure, characterized in that: include: A base, the bottom surface of which is used to fit with the heat source and transfer heat from the heat source, the top surface of the base including a heat exchange groove, the bottom surface of which is provided with a heat exchange fin group; as well as A diverter plate is provided on the base, and the diverter plate comprises: A liquid separation chamber, which is arranged on the upper part of the diverter plate; A heat exchange chamber is provided at the lower portion of the diverter plate, and the heat exchange chamber is buckled onto the heat exchange fin group; wherein the liquid separation chamber and the heat exchange chamber are arranged in an up-and-down structure; and at least one flow diversion channel communicating between the liquid diversion chamber and the heat exchange chamber; The heat exchange cavity is used to connect with the heat exchange tank, the heat exchange fin group is accommodated in the heat exchange cavity, and the heat exchange cavity and the heat exchange fin group constitute a heat exchange structure; The position of the at least one diversion channel matches the position of the heat-generating core portion of the heat exchange fin group.

2. The liquid cooling shunt structure according to claim 1, wherein: The heat exchange fin group is a plurality of fins extending upward from the bottom surface of the heat exchange tank, perpendicular to the bottom surface of the heat exchange tank, and arranged parallel to each other, and a microchannel exists between every two fins.

3. The liquid cooling shunt structure according to claim 2, wherein: The length direction of the at least one diversion channel is perpendicular to the direction of the microchannels of the heat exchange fin group.

4. The liquid cooling shunt structure according to claim 3, wherein: The heat exchange fin group includes at least one spacing channel perpendicular to the microchannel.

5. The liquid cooling shunt structure according to claim 4, wherein: A partition plate is provided in the spacing groove, which extends vertically upward from the bottom surface of the spacing groove and vertically abuts against the top surface of the heat exchange groove. The at least one partition plate divides the heat exchange fin group into at least two heat exchange fin group areas.

6. The liquid cooling shunt structure according to claim 4, wherein: A partition plate is provided in the spacing groove, which extends vertically downward from the top surface of the heat exchange cavity and vertically abuts against the bottom surface of the spacing groove. The at least one partition plate divides the heat exchange fin group into at least two heat exchange fin group areas.

7. The liquid cooling shunt structure according to claim 5 or 6, characterized in that: Each of the heat exchange fin group areas corresponds to a heat generating core portion.

8. The liquid cooling shunt structure according to claim 5 or 6, characterized in that: The number of the at least one diversion channel corresponds to the number of the heat exchange fin group areas.

9. The liquid cooling shunt structure according to claim 4, wherein: It also includes a plurality of liquid collection channels, which are respectively arranged between the opening of one side of the microchannel of the heat exchange fin group area and the side wall of the heat exchange groove and between the opening of the other side of the microchannel of the heat exchange fin group area and the partition plate.

10. The liquid cooling shunt structure according to claim 9, characterized in that: It also includes a lateral liquid collection channel, which is arranged between the outer side wall of the heat exchange fin group and the side wall of the heat exchange tank.

11. The liquid cooling shunt structure according to claim 3, wherein: The diversion channel further includes at least one expansion area, the at least one expansion area is directly opposite to a heat-generating core portion, and the shape of the at least one expansion area is circular, elliptical or polygonal.

12. A cold head, characterized in that: It comprises the liquid cooling diversion structure according to any one of claims 1 to 11.

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