A copper brazing water-cooled radiator structure

Abstract

The utility model provides a copper brazing water -cooling radiator structure, it makes the cooling medium flow order, smooth in the heat dissipation cavity, and has reduced flow resistance, makes the heat transfer effect good, and copper brazing has improved the welding quality. It includes: the cover plate part, it includes the cooling cavity that is concave from below to above, the upper surface of cooling cavity is provided with a liquid inlet, a liquid outlet, the lower surface of the upper plate of liquid inlet is provided with a concave guide groove, the guide groove length direction extends to both ends and sets up, the shovel tooth part, it includes the bottom plate and the several groups of shovel tooth that are convex on the bottom plate upper surface center area, several groups of shovel tooth splices form shovel tooth face area, the shovel tooth face area is provided with the recessed guide area in the position of corresponding to the guide groove, and two joints, including a liquid inlet joint, a liquid outlet joint.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling structures for electronic devices, specifically a copper brazing water-cooled radiator structure. Background Technology

[0002] With the rapid development of power systems, power electronic components are rapidly developing towards high performance, high power, and miniaturization. If the heat generated during their operation is not dissipated in time, it will cause the temperature of the electronic components to rise. When the junction temperature of electronic equipment reaches a certain value, its reliability decreases by 5% for every 1°C increase, and the failure rate will increase sharply with the increase in temperature, thereby affecting the stability and reliability of its operation, and thus affecting the normal operation of power systems or new energy vehicles.

[0003] Existing heat dissipation solutions have certain limitations, such as: aluminum heat sinks have low thermal conductivity and cannot meet the requirements of high heat flux density scenarios; traditional copper brazed heat sinks mostly use straight grooves or serpentine flow channels, resulting in uneven distribution of coolant flow; and due to improper selection of brazing materials or improper use of processes, incomplete or missing welds may occur. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a copper brazed water-cooled radiator structure, which ensures orderly and smooth flow of the cooling medium within the heat dissipation cavity, reduces flow resistance, improves heat transfer performance, and enhances welding quality through copper brazing.

[0005] A copper brazed water-cooled radiator structure, characterized in that it comprises:

[0006] The cover plate includes a cooling cavity that is recessed from bottom to top. The upper surface of the cooling cavity is provided with a liquid inlet and a liquid outlet. The lower surface of the upper plate corresponding to the liquid inlet is provided with a recessed guide groove, which extends to both ends in the length direction.

[0007] The shovel tooth part includes a base plate and several sets of shovel teeth that protrude upwards in the central area of ​​the upper surface of the base plate. The several sets of shovel teeth are assembled to form a shovel tooth surface area. The shovel tooth surface area is provided with a recessed guide area corresponding to the position of the guide groove.

[0008] And two connectors, including an inlet connector and an outlet connector;

[0009] The base plate is shaped to conform to the surface area of ​​the cooling cavity. The shovel teeth are embedded in the cooling cavity and connected as a whole by brazing. The surface area of ​​the cooling cavity is larger than the surface area of ​​the shovel teeth, forming guide channels around it. Except for the recessed guide area, the upper surface of the remaining shovel teeth is arranged close to the lower surface of the upper plate. All the shovel teeth are arranged perpendicular to the length extension direction of the guide groove. The guide groove and the recessed guide area guide the coolant into the flow channel formed between adjacent shovel teeth. One side of the guide flow channel parallel to the arrangement direction of each shovel tooth is a converging output flow channel. The position of the upper plate corresponding to the converging output flow channel is provided with the liquid outlet. The liquid inlet is fixedly equipped with the liquid inlet connector, and the liquid outlet is fixedly equipped with the liquid outlet connector.

[0010] Its further features are:

[0011] The upper plate is provided with a lower convex baffle at a position near the liquid outlet corresponding to the shovel tooth surface area. The lower convex baffle is used to independently separate the converging output channel. In addition to guiding the water flow from the shovel teeth to the liquid outlet, it can also increase the heat dissipation area and increase the heat dissipation.

[0012] The shovel tooth surface area is provided with several stop and limit shovel teeth at both ends of the guide groove along the length direction. The stop and limit shovel teeth at each end are used to block the cooling medium in the guide groove and the recessed guide area, so that the cooling medium can reliably pass through the flow channel between the shovel teeth in the recessed guide area, and the cooling medium will not directly impact the two end walls of the cooling cavity along the length direction.

[0013] The cooling chamber is also provided with a stop end face. The upper surface of the base plate is closely attached to the stop end face at the corresponding position and is formed as a whole by brazing. The end limit teeth of the stop limit teeth away from the liquid outlet have only an anti-collision gap with the corresponding end wall of the cooling chamber, so that the guide flow channel at the corresponding position only has a part of the guide gap, so as to minimize the waste of heat dissipation space in the heat dissipation chamber.

[0014] The number of stop and limit teeth at both ends is at least three, which prevents the coolant flowing in from the inlet from being blocked in the concave guide area between the two sets of stop and limit teeth and is reliably diverted. The number of stop and limit teeth should not be too few, otherwise the NC tool will break the stop and limit teeth when it performs the tooth cutting.

[0015] The liquid inlet is located directly above the center of the shovel tooth area to ensure that the cooling medium flows evenly and reliably to the surrounding areas.

[0016] The liquid outlet is located directly above the center of the confluence output channel to ensure reliable flow of the cooling medium.

[0017] In addition to the channel hole, the upper plate of the liquid inlet and liquid outlet is also provided with a recessed contoured positioning stop surface. The connector ends of the liquid inlet and liquid outlet are provided with square connecting ends. After the square connecting ends are inserted into the corresponding contoured positioning stop surfaces, they are reliably positioned by copper brazing.

[0018] Both the inlet and outlet connectors are turret heads. The materials of the inlet and outlet connectors, cover plate, and shovel teeth are all C1100. The inlet and outlet connectors, cover plate, and shovel teeth are welded together as a single structure by copper brazing. Welding sheets are used instead of solder paste to preform the structure, resulting in uniform thickness and low porosity. Welding paste can be used to fill in the weld edges according to the actual welding situation.

[0019] With the technology of this utility model, the cooling medium enters the guide groove and the concave guide area through the liquid inlet. Then, the concave guide area directs the coolant into the flow channels formed between adjacent shovel teeth. The cooling medium then completes the cooling of the object to be cooled through the flow channels between the shovel teeth. The cooling medium flows along the guide channels on both sides into the converging output flow channel and then flows out through the liquid outlet. The shovel tooth area is designed as a groove structure directly below the guide groove, forming a lower guide area, which can enhance the fins' ability to withstand water flow impact. The structure of the entire shovel tooth area can also perform water diversion. The shovel teeth are embedded in the cooling cavity and are connected to the cover plate by brazing to form a whole. In summary, it makes the cooling medium flow in the heat dissipation cavity orderly and smooth, reduces the flow resistance, and makes the heat transfer effect good. In addition, the copper brazing improves the welding quality. Attached Figure Description

[0020] Figure 1 This is a bottom view structural schematic diagram of the cover plate portion of this utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the cover plate portion of this utility model;

[0022] Figure 3 This is a perspective view of the shovel tooth portion of this utility model;

[0023] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A;

[0024] Figure 5 This is a three-dimensional exploded view of the present invention;

[0025] Figure 6 This is a top view of the present invention (the arrows in the figure indicate the flow direction of the cooling medium);

[0026] Figure 7 for Figure 6 A schematic diagram of the BB cross-section (arrows in the diagram indicate the direction of cooling medium flow);

[0027] The names corresponding to the serial numbers in the diagram are as follows:

[0028] Square connector 1;

[0029] 10. Cover plate, 11. Cooling chamber, 111. Stop end face, 12. Liquid inlet, 13. Liquid outlet, 14. Guide groove, 15. Upper plate, 151. Contour positioning stop face, 16. Lower convex partition, 17. Heat dissipation boss, 18. Mounting hole, 20. Shovel tooth part, 21. Base plate, 22. Shovel tooth, 22. Flow channel, 221. Shovel tooth surface area, 23. Lowered guide area, 24. Arc arrangement structure, 25. Converging output flow channel, 26. Stop limiting shovel tooth, 27. Lowered cavity, 28. Liquid inlet connector, 30. Liquid outlet connector, 40. Detailed Implementation

[0030] A copper brazed water-cooled radiator structure, see Figures 1-7 It includes a cover plate portion 10, a shovel tooth portion 20, and two connectors;

[0031] The cover plate portion 10 includes a cooling cavity 11 that is recessed from bottom to top. The upper surface of the cooling cavity 11 is provided with a liquid inlet 12 and a liquid outlet 13. The lower surface of the upper plate 15 corresponding to the liquid inlet 12 is provided with a recessed guide groove 14. The guide groove 14 extends to both ends in the length direction.

[0032] The shovel tooth portion 20 includes a base plate 21 and several sets of shovel teeth 22 that protrude upwards in the central area of ​​the upper surface of the base plate 21. The several sets of shovel teeth 22 are assembled to form a shovel tooth surface area 23. A recessed guide area 24 is provided in the shovel tooth surface area 23 corresponding to the position of the guide groove 14. The corresponding positions of the shovel teeth in the recessed guide area 24 are recessed. The shovel teeth in the recessed guide areas 24 at both ends of the length direction are arranged in an arc-shaped structure 25.

[0033] The two connectors include an inlet connector 30 and an outlet connector 40.

[0034] The base plate 21 is arranged in the shape of the cooling cavity 11. The shovel teeth 20 are embedded in the cooling cavity 11 and connected by brazing to form a whole. The area of ​​the cooling cavity 11 is larger than the area of ​​the shovel teeth 23, forming guide channels around it. Except for the recessed guide area 24, the upper surface of the remaining shovel teeth 22 of the shovel teeth area 23 is arranged close to the lower surface of the upper plate 15. All the shovel teeth 22 are arranged perpendicular to the length extension direction of the guide groove 14. The guide groove 14 and the recessed guide area 24 deliver the coolant to the flow channel 221 formed between adjacent shovel teeth 22. One side of the guide channel parallel to the arrangement direction of each shovel tooth is the converging output channel 26. The position of the converging output channel 26 on the upper plate 15 is provided with an outlet 13. The inlet 12 is fixedly equipped with an inlet connector 30, and the outlet 13 is fixedly equipped with an outlet connector 40.

[0035] In a specific embodiment,

[0036] The base plate 21 is provided with a recessed cavity 28 corresponding to the shovel tooth surface area 23. The recessed cavity 28 is the downward extension area of ​​the shovel tooth 22, ensuring that the heat exchange cavity has expansion space. The depth of the recessed cavity 28 is set according to the requirements and installation space.

[0037] The upper plate 15 is provided with a lower convex baffle 16 near the liquid outlet 13 corresponding to the position of the shovel tooth surface area 23. The lower convex baffle 16 is used to separate the confluence output channel 26 independently. In addition to guiding the water flow from the shovel tooth 22 to the liquid outlet 13, it can also increase the heat dissipation area and increase the heat dissipation.

[0038] The toothed surface area 23 is provided with several stop and limit teeth 27 at both ends of the guide groove 14 along the length direction. The stop and limit teeth 27 at each end are used to block the cooling medium in the guide groove 14 and the recessed guide area 24, so that the cooling medium can reliably pass through the flow channel 221 between the teeth 22 in the recessed guide area 24, and the cooling medium will not directly impact the two end walls of the cooling cavity 11 along the length direction.

[0039] In a specific embodiment, a stop end face 111 is also provided around the bottom of the cooling cavity 11. The upper surface of the base plate 21 is closely attached to the stop end face 111 at the corresponding position and is formed as a whole by brazing. The end limit tooth 27 of the stop limit tooth 27 away from the liquid outlet 13 has an anti-collision gap with the corresponding end wall of the cooling cavity 11, so that the guide flow channel at the corresponding position only has a part of the guide gap, so as to minimize the waste of heat dissipation space in the heat dissipation cavity.

[0040] In a specific embodiment, there are four stop and limit teeth 22 located at both ends, which prevent the coolant flowing in from the inlet 12 from being blocked in the concave guide area 24 between the two sets of stop and limit teeth 22 and reliably diverted. The number of stop and limit teeth 22 should not be too small, otherwise the NC tool will break the stop and limit teeth when it performs tooth cutting.

[0041] In a specific embodiment, the liquid inlet 12 is located at the center of the shovel tooth area 23 to ensure that the cooling medium flows evenly and reliably to the surrounding areas.

[0042] The outlet 13 is located directly above the center of the confluence output channel 26 to ensure reliable flow of the cooling medium.

[0043] In a specific embodiment, in addition to the channel hole, the upper plate 15 of the liquid inlet 12 and the liquid outlet 13 is also provided with a recessed contoured positioning stop surface 151. The connector ends of the liquid inlet connector 30 and the liquid outlet connector 40 are provided with square connecting ends 1. After the square connecting ends 1 are inserted into the corresponding contoured positioning stop surface 151, they are reliably positioned by copper brazing.

[0044] In a specific embodiment, the liquid inlet connector 30 and the liquid outlet connector 40 are both turret heads. The liquid inlet connector 30, the liquid outlet connector 40, the cover plate part 10 and the shovel tooth part 20 are all made of C1100. The liquid inlet connector 30, the liquid outlet connector 40, the cover plate part 10 and the shovel tooth part 20 are welded into a single structure by copper brazing. Welding sheets are used instead of welding paste to preform the structure, resulting in uniform thickness and low porosity. Welding paste can be used to fill the welded edges according to the actual welding situation.

[0045] In practice, the cover plate 10 is also provided with several heat dissipation protrusions 17 and mounting holes 18, which can be arranged reasonably according to the installation space.

[0046] In practice, the upper and lower positions can be flipped according to the actual assembly position without affecting the use of the entire structure.

[0047] Its beneficial effects are as follows:

[0048] This patent is based on a common water-cooled radiator and optimizes its structure. It consists of two sets of turret heads, a cover plate, and a shovel tooth section, all made of C1100 copper. Referring to the design concept of server water distributors, a concave guide area is designed on the shovel tooth below the liquid inlet, and a corresponding guide groove is designed on the cover plate. When water flows down from the turret head, it will create a downward impact on the shovel tooth. The shovel tooth in the concave guide area can reduce this impact. This cavity can also perform a flow diversion function, allowing the fluid to flow from above and below the shovel tooth. The convex baffle between the inlet and outlet of the cover plate effectively guides the water flowing out of the shovel tooth to the liquid outlet, so that the water flow is orderly. Compared with ordinary water-cooled radiators, this structural design increases the intensity of turbulence by generating vortices from the groove combination, greatly reduces thermal resistance, and improves the temperature uniformity of the product. It is suitable for battery cold plates in new energy vehicles and CPU water cooling blocks in servers.

[0049] This patent is based on the common copper brazing water-cooled radiator that uses solder paste for welding. In addition to structural optimization, it also uses the form of solder pads for welding. If the edge welding is not good, it can be repaired with solder paste. It has the advantages of low process cost, low defect rate and low labor cost, and has reference value for the later time-saving and labor-saving welding process.

[0050] The water-cooled radiator is made of C1100 copper, which has excellent thermal conductivity and structural reliability. It is suitable for high-end electronic heat dissipation and new energy fields. The direction of the turret head can be designed and modified according to actual needs.

[0051] The addition of water distribution and flow guiding structures to the water-cooled radiator, along with the use of solder pads instead of solder paste for copper brazing, enhances the turbulence effect to a certain extent, increasing the heat transfer coefficient by 30-50%. Simulation verification shows that the added groove structure improves cooling efficiency by 10%. The enhanced cooling effect is even more pronounced at turbulent flow points. Performance testing shows that the thermal resistance of the cold plate is between 0.01-0.1℃, within the range of high-performance cold plates. Gas and helium tests also meet standard requirements, indicating that both the structural design and welding method are effective, resulting in significant improvements in product performance and yield.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A copper brazed water-cooled heat sink structure, characterized by, It includes: The cover plate includes a cooling cavity that is recessed from bottom to top. The upper surface of the cooling cavity is provided with a liquid inlet and a liquid outlet. The lower surface of the upper plate corresponding to the liquid inlet is provided with a recessed guide groove, which extends to both ends in the length direction. The shovel tooth part includes a base plate and several sets of shovel teeth that protrude upwards in the central area of ​​the upper surface of the base plate. The several sets of shovel teeth are assembled to form a shovel tooth surface area. The shovel tooth surface area is provided with a recessed guide area corresponding to the position of the guide groove. And two connectors, including an inlet connector and an outlet connector; The base plate is shaped to conform to the surface area of ​​the cooling cavity. The shovel teeth are embedded in the cooling cavity and connected as a whole by brazing. The surface area of ​​the cooling cavity is larger than the surface area of ​​the shovel teeth, forming guide channels around it. Except for the recessed guide area, the upper surface of the remaining shovel teeth is arranged close to the lower surface of the upper plate. All the shovel teeth are arranged perpendicular to the length extension direction of the guide groove. The guide groove and the recessed guide area guide the coolant into the flow channel formed between adjacent shovel teeth. One side of the guide flow channel parallel to the arrangement direction of each shovel tooth is a converging output flow channel. The position of the upper plate corresponding to the converging output flow channel is provided with the liquid outlet. The liquid inlet is fixedly equipped with the liquid inlet connector, and the liquid outlet is fixedly equipped with the liquid outlet connector.

2. The copper-brazed water-cooled heat sink structure of claim 1, wherein: The upper plate is provided with a convex baffle at a position near the liquid outlet corresponding to the shovel tooth surface area. The convex baffle is used to independently separate the confluence output channel.

3. The copper-brazed water-cooled heat sink structure of claim 1, wherein: The shovel tooth surface area is provided with several stop and limit shovel teeth at both ends of the guide groove along its length direction. The stop and limit shovel teeth at each end are used to block the cooling medium in the guide groove and the recessed guide area.

4. The structure of a copper brazed water-cooled radiator according to claim 1, characterized in that: The cooling chamber is also provided with a stop end face. The upper surface of the base plate is closely attached to the stop end face at the corresponding position and is formed as a whole by brazing. The end limit teeth of the stop limit teeth away from the liquid outlet have an anti-collision gap with the corresponding end wall of the cooling chamber.

5. The copper brazed water-cooled radiator structure according to claim 3, characterized in that: The number of stop and limit teeth located at both ends is at least three.

6. The copper brazed water-cooled radiator structure according to claim 1, characterized in that: The liquid inlet is located directly above the center of the shovel tooth area.

7. The copper brazed water-cooled radiator structure according to claim 1, characterized in that: The outlet is located directly above the center of the confluence output channel.

8. The structure of a copper brazed water-cooled radiator according to claim 1, characterized in that: In addition to the channel hole, the upper plate of the liquid inlet and outlet is also provided with a recessed contoured positioning stop surface. The connector ends of the liquid inlet and outlet are provided with square connecting ends. The square connecting ends are inserted into the corresponding contoured positioning stop surfaces and then connected by copper brazing.

9. The structure of a copper brazed water-cooled radiator according to claim 8, characterized in that: Both the liquid inlet and liquid outlet connectors are turret heads. The liquid inlet, liquid outlet connectors, cover plate, and shovel teeth are all made of C1100. The liquid inlet, liquid outlet, cover plate, and shovel teeth are welded together as a single structure by copper brazing.

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