Liquid cooling shunting structure and cold head using same

Abstract

The utility model discloses a liquid cooling shunting structure and a cold head using the same. The liquid cooling shunting structure comprises a base and a shunting plate, the bottom face of the base is used for being attached to a heating source and transmitting heat of the heating source, a heat exchange groove is formed in the top face of the base, and a heat exchange fin set is arranged on the bottom face of the heat exchange groove. The splitter plate is arranged on the base and comprises a liquid separation cavity, a heat exchange cavity and at least one splitter channel. The liquid separation cavity and the heat exchange cavity are arranged in an up-down structure; the at least one flow dividing channel is communicated between the liquid dividing cavity and the heat exchange cavity; wherein the heat exchange cavity is used for being in butt joint with the heat exchange groove, the heat exchange fin set is contained in the heat exchange cavity, and the heat exchange cavity and the heat exchange fin set form a heat exchange structure. And the position of at least one shunting channel is matched with the position of the heating core part of the heat exchange fin group. Therefore, the cold liquid flow in the heat exchange area above the heating core can be increased, and the heat exchange of the area is enhanced; and 2, flow regulation can be carried out on areas with different temperature distributions.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation of electronic equipment, in particular to a liquid cooling shunt structure and a cold head using the liquid cooling shunt structure. Background Art

[0002] The working principle of the liquid cooling radiator is: under the action of the pump, the cold liquid brings the heat from the heat exchange area to the heat dissipation radiator through flow, 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.

[0003] Among them, the flow and heat transfer in the cold head has an important impact on the performance and operation status of the entire system. Figure 1 As shown, it mainly includes a cover body 1, a rubber pad 2, a water-blocking plate 3, a shell 4, a metal sheet 5, a diverter plate 6 and a base 7.

[0004] Improving the performance of liquid cooling radiators is a goal that researchers in this industry and technology have always pursued. The problems of existing technologies mainly include three aspects:

[0005] (1) Figure 1 As shown, 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 heat-generating core temperature and poor overall performance of the system or product.

[0006] (2) Figure 1 As shown, the conventional heat exchange zone structure cannot distribute 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 efficient operation of each area of ​​the system, resulting in poor overall performance of the system or product.

[0007] (3) Figure 1 As shown, the common cold head structure, when dealing with different heat source scenarios (such as Intel and AMD), in order to achieve their respective optimal performance, needs to design two sets of solutions and products, corresponding Figure 1 Each component in the machine requires two sets of materials, which results in high production costs and poor economic benefits for the enterprise.

[0008] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0009] The purpose of the utility model is to provide a liquid cooling diversion structure, which can, on the one hand, increase the flow of cold liquid in the heat exchange area above the heating core and strengthen the heat exchange in this area; on the other hand, it can adjust the flow in areas with different temperature distributions.

[0010] Another object of the present invention is to provide a cold head including the above-mentioned liquid cooling shunt structure.

[0011] To achieve the above-mentioned purpose, the utility model provides a liquid-cooled diversion structure, including a base and a diversion plate; the bottom surface of the base is used to fit and install with a 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 arranged 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 heat-generating core of the heat exchange fin group.

[0012] 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.

[0013] In a preferred embodiment, the length direction of at least one flow diversion channel is perpendicular to the microchannel direction of the heat exchange fin group.

[0014] In a preferred embodiment, the heat exchange fin group includes at least one spacing channel perpendicular to the microchannel.

[0015] In a preferred embodiment, a partition plate is provided in the spacing groove, and the partition plate extends vertically upward from the bottom surface of the spacing groove and vertically abuts against 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.

[0016] 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 against 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.

[0017] In a preferred embodiment, each heat exchange fin group area corresponds to a heat generating core portion.

[0018] In a preferred embodiment, the number of the at least one flow-dividing channel corresponds to the number of the heat exchange fin group areas.

[0019] In a preferred embodiment, the liquid cooling diversion structure also includes a plurality of liquid collecting 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.

[0020] In a preferred embodiment, the liquid cooling flow distribution structure further includes a lateral liquid collecting channel, which is arranged between the outer side wall of the heat exchange fin group and the side wall of the heat exchange tank.

[0021] In a preferred embodiment, the flow diversion channel further includes at least one flow expansion area, the at least one flow expansion area is directly opposite to a heat generating core portion, and the shape of the at least one flow expansion area is circular, elliptical or polygonal.

[0022] In order to achieve the above another object, the utility model further provides a cold head, which includes the above liquid cooling shunt structure.

[0023] Compared with the prior art, the liquid cooling shunt structure and the cold head using the liquid cooling shunt structure of the utility model 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 impact, the cold liquid penetrates into the root of the fins and quickly takes 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 high heat power from overheating in certain areas, 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 the existing technology; reduce the types of materials, reduce the production costs of enterprises, and improve economic benefits; the upper heat exchange cavity in the diverter plate is set as an upper and lower stacking structure, which is beneficial to only adjust 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 and different heat source scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a three-dimensional decomposed structure of a liquid cooling flow distribution structure according to an embodiment of the prior art;

[0025] Figure 2 It is a schematic diagram of a three-dimensional exploded structure of a liquid cooling flow distribution structure according to an embodiment of the utility model;

[0026] Figure 3It is a three-dimensional structural schematic diagram of a liquid cooling flow diversion structure according to an embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of a diverter plate according to one embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of a base according to an embodiment of the utility model;

[0029] Figure 6 It is a schematic diagram of a top view of a liquid cooling flow diversion structure according to an embodiment of the utility model;

[0030] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure at A-A;

[0031] Figure 8 yes Figure 7 A schematic cross-sectional view of the structure at B-B;

[0032] Fig. 9 It is a schematic front view of the cooling liquid flow direction of the liquid cooling split flow structure according to one embodiment of the utility model;

[0033] Fig.10 It is a schematic top view of the cooling liquid flow direction of the liquid cooling diversion structure according to one embodiment of the utility model;

[0034] Fig.11 is a schematic diagram of the three-dimensional structure of a liquid cooling flow diversion structure according to another embodiment of the utility model;

[0035] Fig.12 It is a schematic diagram of a three-dimensional exploded structure of a liquid cooling flow distribution structure according to another embodiment of the utility model;

[0036] Fig.13 is a schematic diagram of a top cross-sectional structure of a liquid cooling flow splitter structure according to another embodiment of the utility model;

[0037] Fig.14 yes Fig.13 A schematic diagram of the cross-sectional structure at C-C;

[0038] Fig.15 yes Fig.13 A schematic diagram of the cross-sectional structure at D-D of FIG.

[0039] Fig.16 It is a schematic front view of the cold liquid flow direction of the liquid cooling split structure according to another embodiment of the utility model;

[0040] Fig.17 It is a schematic diagram of the side structure of a heat exchange fin group according to another embodiment of the utility model.

[0041] Description of main reference numerals:

[0042] 1-cover, 2-rubber pad, 3-water-blocking plate, 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

[0043] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0044] Unless explicitly 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 components.

[0045] like Figures 2 to 5 As shown, a liquid-cooled diversion structure according to a preferred embodiment of the utility model mainly includes a base 7 and a diversion plate 6; the bottom surface of the base 7 is used for fitting and mounting with a heat source and for transferring heat from the heat source, the top surface of the base 7 includes a heat exchange groove 701, and a heat exchange fin group 702 is arranged 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; wherein 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; wherein the position of at least one diversion channel 605 matches the position of the heat-generating core part 9 of the heat exchange fin group 702.

[0046] like Figure 2-5 As shown, 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.

[0047] The partition plate 703 is integrally arranged with the diverter plate 7, and 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, and extends vertically upward from the bottom surface of the spacing groove 7027 and vertically abuts against the bottom surface of the diverter plate 7.

[0048] like Figures 6 to 10 As shown, in some embodiments, the top surface of the diverter plate 6 is provided with a liquid inlet channel 601, and both sides are provided with liquid outlet channels 602 connected to the heat exchange groove 701. The liquid inlet channel 601 is connected to the liquid separation chamber 603, and 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 two ends of the heat exchange chamber 604 are provided with a first liquid outlet channel 6021 and a second liquid outlet channel 6022, and 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), and 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 shell.

[0049] See also Figure 7 , Figure 8 In some embodiments, the heat exchange chamber 604 is buckled at the heat exchange slot 701 and forms a heat exchange structure with the heat exchange slot 701 and the heat exchange fin group 702. The entire heat exchange fin group 702 is accommodated inside the heat exchange chamber.

[0050] In some embodiments, the heat exchange fin group 702 is composed of a plurality of fins, extending upward from the bottom surface of the heat exchange tank 701, and the fins are arranged perpendicularly and parallel to the bottom surface of the heat exchange tank 701, and the plurality of fins are integrally connected to the bottom of the heat exchange tank 701, and there is a microchannel between every two fins. The length direction of at least one diversion channel 605 is arranged perpendicularly to the microchannel direction of the heat exchange fin group 702.

[0051] 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 vertically arranged with the bottom surface of the heat exchange tank 701 and the microchannel of the heat exchange fin group 702. The partition plate 703 is integrally connected with the bottom surface of the heat exchange tank 701 (the partition plate can also be arranged on the top surface of the heat exchange cavity, but it is preferably arranged on the base, which is more conducive to heat exchange). 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 at least one diversion channel 605 corresponds to the number of heat exchange fin group areas.

[0052] 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 is fully heat exchanged with the fins and the bottom of the microchannel.

[0053] In some embodiments, the liquid cooling diversion structure further includes a plurality of liquid collecting 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.

[0054] In some embodiments, the liquid cooling flow distribution structure further includes lateral liquid collecting channels 7025 and 7026 , and 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 groove 701 .

[0055] See also Fig. 9 , Fig.10 In some embodiments, the direction of the cold liquid in this embodiment is shown by the arrow in the figure. 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 along the microchannels of the heat exchange fin group 702 in the other direction and enters 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.

[0056] See also Figure 8In some embodiments, the flow diversion channel 605 further includes at least one expansion area 6051, at least one expansion area 6051 is directly opposite to a heating core part 9, and at least one expansion area 6051 is circular, elliptical or polygonal in shape. In actual work, each heating core part 9 also has a corresponding heating core area where the heat is most concentrated. The heat generation is most concentrated, the heat generation is the largest, and the temperature is high. Therefore, the heating core area requires the largest amount of cold liquid flow. The setting of the expansion area 6051 can just meet this demand. The expansion area 6051 can be directly opposite to the heating core area, increase the flow of cold liquid there, and allow a large amount of cold liquid to directly flush the heating core area, so as to increase the heat exchange there and promote the temperature reduction of the heating core area.

[0057] like Figures 11 to 16 As shown, in some embodiments, the distribution of the heating core area is different, for example Figure 8 In the embodiment, the heat generating core area is biased toward one side of the heat exchange fin group 702'. Figure 8 The two flow diversion channels 605' of the embodiment are respectively arranged above the two heat exchange fin group areas, and a corresponding flow expansion area 6051' is added at the position of each flow diversion channel 605' located in the heat generation core area. Figure 8 The difference in the embodiment is that Fig.13 The two heat-generating core areas of the embodiment are distributed at one end of the heat exchange fin group 702. Therefore, the flow diversion channel 605' of the embodiment is only arranged above the two heat-generating core areas, and one flow diversion channel 605' runs through the two heat-generating core areas, and expansion areas 6051' are respectively provided on the one flow diversion channel 605' corresponding to the positions of the two heat-generating core areas. Fig.11 and Fig.12 This embodiment can also be imagined as Figure 8 The diverter plate 6 and the base 7 of the embodiment are rotated 90 degrees.

[0058] See also Fig.16 In some embodiments, the cold liquid of this embodiment moves as follows Fig.16 As shown in the direction of the middle arrow, 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' of the heat exchange chamber 604 through the flow diversion channel 605'. The cold liquid flows along the direction of the microchannel. A part of the cold liquid enters the first liquid collection channel 7021 from one end of the microchannel and then flows out from the first liquid outlet channel 6021; another part of the cold liquid enters the second liquid collection 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 Figures 11 to 16In the embodiment shown, the partition plate 703 may not be provided. Since the heat-generating 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 heat-generating core area is closer, the flow rate and flow rate of the cold liquid flowing to the first collecting channel 7021 are relatively large, which can just take away more heat from the heat-generating core area. The second collecting channel 7022 is far away from the heat-generating 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 meets the principle that there is no heat-generating core area at this end and less heat needs to be taken away.

[0059] like Fig.17 As shown, 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 portion 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 portion 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, and 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.

[0060] See also Figures 2 to 3 and Fig.11 and Fig.12 As shown, in order to achieve the other purpose mentioned above, the utility model 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 installation in conjunction with the heating core 9, and a heat source cover 8 is generally provided on the heating core 9, and a water inlet 401 and a water outlet 402 are provided on the shell, and the water inlet 401 and the water outlet 402 are used to connect with a circulation pump to drive the in and out circulation of the cooling liquid.

[0061] In summary, the liquid cooling shunt structure of the utility model 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 the temperature of the cold liquid exchanging heat 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 thermal power of the heat-generating core, this technology can distribute flow to areas with different thermal power to prevent areas with high thermal power from being Overheating occurs in the domain, ensuring the efficient operation of each area 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 the existing technology; reduce the types of materials, reduce the production costs of enterprises, and improve economic benefits; the upper heat exchange cavity in the diverter plate is set as an upper and lower stacking structure, which is beneficial to only adjust 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 and different heat source scenarios.

[0062] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model 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 the heat of the heat source, the top surface of the base includes a heat exchange groove, and the bottom surface of the heat exchange groove is provided with a heat exchange fin group; as well as A diverter plate is arranged 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, which is arranged at the lower part of the diverter 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 up-and-down structure; and At least one flow dividing channel connected between the liquid dividing chamber and the heat exchanging chamber; The heat exchange cavity is used to connect with the heat exchange slot, 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 flow diversion channel matches the position of the heat-generating core of the heat exchange fin group.

2. The liquid cooling shunt structure according to claim 1, characterized in that: 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, characterized in that: The length direction of the at least one flow diversion channel is arranged perpendicular to the direction of the microchannels of the heat exchange fin group.

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

5. The liquid cooling flow splitting structure according to claim 4, characterized in that: A partition plate is arranged in the spacing channel, which extends vertically upward from the bottom surface of the spacing channel 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, characterized in that: A partition plate is arranged in the spacing channel, which extends vertically downward from the top surface of the heat exchange cavity and vertically abuts against the bottom surface of the spacing channel. 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 flow splitting 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 flow splitting structure according to claim 5 or 6, characterized in that: The number of the at least one flow diversion channel corresponds to the number of the heat exchange fin group areas.

9. The liquid cooling flow splitting structure according to claim 5, characterized in that: It also includes a plurality of liquid collecting 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 flow distribution 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 flow distribution structure according to claim 3, characterized in that: The flow diversion channel further includes at least one flow expansion area, the at least one flow expansion area is directly opposite to a heat-generating core portion, and the shape of the at least one flow expansion area is circular, elliptical or polygonal.

12. A cold head, characterized in that: It comprises the liquid cooling flow distribution structure as claimed in any one of claims 1 to 11.

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