Vacuum brazing miniature water cooling plate with improved structure

Abstract

The utility model relates to the technical field of miniature water-cooling plates, and discloses a miniature water-cooling plate with a vacuum brazing improved structure, which comprises a cover plate, a base plate and a brazing sheet, the cover plate and the base plate are welded together through the brazing sheet, the bottom surface of the cover plate is provided with an upper flow channel, the surface of the base plate is provided with a lower flow channel, and the upper flow channel is communicated with the lower flow channel. Communicating ports are formed in the two sides of the base plate, the two sets of communicating ports communicate with the two ends of the lower runner correspondingly, hollowed-out positions are formed in the surfaces of the drill pieces, positioning columns are fixedly connected to the opposite corners of the bottom face of the cover plate, inserting holes are formed in the opposite corners of the surface of the base plate, and positioning holes are formed in the opposite corners of the surfaces of the drill pieces. According to the utility model, the hollow part is arranged on the surface of the brazing sheet, an extra channel space is provided for a cooling medium, the brazing sheet is prevented from blocking the flow channel, the outline of the hollow part is larger than the diameter of the upper flow channel and the diameter of the lower flow channel, the cooling medium can smoothly flow through, and enough channel space is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of micro water cooling plates, in particular to a micro water cooling plate with improved vacuum brazing structure. Background Art

[0002] In the mid-to-late 20th century, with the emergence of solid-state circuits, integrated circuits, and large-scale integrated circuits, electronic equipment began to develop in the direction of small, ultra-small, and micro-assembly. Due to the continuous development of microelectronic technologies such as very large-scale integrated circuits (VLSIC), application-specific integrated circuits (ASICs), and very high-speed integrated circuits (VHSICs), the assembly density of microelectronic components and equipment has increased rapidly. The high-density packaging of electronic equipment has also led to a rapid increase in the heat flux density of components and equipment, especially in airborne electronic equipment, because airborne electronic equipment is subject to strict restrictions on volume and weight. With the increasing complexity of electronic equipment functions, the assembly density is also increasing. At present, the heat consumption density of high-power devices in airborne electronic equipment has reached tens of watts per square centimeter. In order to enable components and equipment to work reliably according to predetermined parameters, effective thermal design and thermal control of the package must be carried out.

[0003] At present, the cooling and heat dissipation measures for airborne electronic equipment mainly include: natural cooling, forced air cooling and forced liquid cooling. Usually, forced liquid cooling uses a serpentine flow channel cold plate, and the flow channel height and width are usually 5ITlm~15mm. With the increase in cooling demand, domestic and foreign countries have begun to conduct application research on microchannel cold plates with greater heat exchange capacity. The continuous increase in the heat consumption density of devices has made it impossible for traditional serpentine flow channel cold plates using a variety of cooling enhancement methods to meet the requirements, and microchannel cooling is an effective way to solve the current problem. It is obvious that microchannel cooling technology greatly increases the fluid-solid heat exchange area. In addition, the fluid boundary layer in the microchannel will become very small. Both aspects will greatly improve the cooling performance.

[0004] The outer dimensions and internal flow channel dimensions of a micro water-cooling plate are usually very small. Generally, vacuum brazing is used to manufacture the welding blank, and then the welding blank is CNC-finished according to the finished product model to obtain the finished product. When the vacuum brazing method is used to manufacture the welding blank, due to the small internal flow channel dimensions, the brazing sheet may partially block the flow channel, thereby causing the welding blank to be scrapped. Therefore, a vacuum brazing improved structure micro water-cooling plate is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a vacuum brazing improved structure micro water cooling plate, which aims to improve the problem that when the vacuum brazing method is used in the prior art to manufacture welding blanks, the brazing sheet may partially block the flow channel due to the small size of the internal flow channel, thereby causing the welding blank to be scrapped.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a vacuum brazing improved structure micro water-cooling plate, comprising a cover plate, a base plate and a brazing sheet, the cover plate and the base plate are welded together by the brazing sheet, an upper flow channel is opened on the bottom surface of the cover plate, a lower flow channel is opened on the surface of the base plate, connecting ports are opened on both sides of the base plate, two groups of connecting ports are respectively connected to the two ends of the lower flow channel, and a hollow area is opened on the surface of the brazing sheet.

[0007] As a further description of the above technical solution:

[0008] Positioning columns are fixedly connected at the diagonal positions of the bottom surface of the cover plate, inserting holes are provided at the diagonal positions of the surface of the base plate, and positioning holes are provided at the diagonal positions of the surface of the drill piece.

[0009] As a further description of the above technical solution:

[0010] The cross sections of the upper flow channel and the lower flow channel are both arc-shaped, and the cross sections of the upper flow channel and the lower flow channel and the cross section of the drill piece form a complete circle.

[0011] As a further description of the above technical solution:

[0012] The outline of the hollowed-out portion is larger than the diameters of the upper flow channel and the lower flow channel.

[0013] As a further description of the above technical solution:

[0014] The diameters of the upper flow channel and the lower flow channel are both 3 mm, and the diameter of the hollow portion outline is 3.4 mm.

[0015] As a further description of the above technical solution:

[0016] The hollowed-out portion corresponds to the positions of the upper flow channel and the lower flow channel.

[0017] As a further description of the above technical solution:

[0018] The positioning column passes through the positioning hole and is inserted in the insertion hole.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, a hollow portion is provided on the surface of the drill bit to provide additional channel space for the cooling medium, thereby preventing the drill bit from blocking the flow channel. The outline of the hollow portion is larger than the diameter of the upper flow channel and the lower flow channel, thereby ensuring that the cooling medium can flow smoothly and providing sufficient channel space.

[0021] 2. In the present invention, due to the design of the upper flow channel and the lower flow channel with an arc-shaped cross section, the cooling medium can flow inside the water-cooled plate in a smoother manner, which can effectively reduce the flow resistance, improve the efficiency of heat transfer, and enhance the heat dissipation performance.

[0022] 3. In the present invention, the simplified structural design of the cover plate, the base plate and the brazing sheet makes the manufacturing process simpler and more efficient, and the vacuum brazing connection provides a reliable connection method, reducing the manufacturing cost and time.

[0023] 4. In the utility model, the optimized flow channel design and the appropriate diameter size ensure that the cooling medium can flow smoothly and fully contact with the brazing sheet during the flow process, thereby achieving effective heat transfer and heat dissipation effects, and better reducing the temperature of the device during the heat dissipation process to keep it running within a suitable temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional schematic diagram of a vacuum brazing improved structure micro water-cooling plate proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the bottom surface of the base plate of a micro water-cooling plate with improved vacuum brazing structure proposed by the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the substrate surface of a micro water-cooling plate with improved vacuum brazing structure proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of a brazing sheet of a micro water-cooling plate with improved vacuum brazing structure proposed by the utility model;

[0028] Figure 5 The utility model provides a schematic structural diagram of the bottom surface of a cover plate of a micro water-cooling plate with improved vacuum brazing structure.

[0029] Legend:

[0030] 1. Cover plate; 11. Upstream channel; 12. Positioning column; 2. Base plate; 21. Downstream channel; 22. Connecting port; 23. Insertion hole; 3. Brazing piece; 31. Hollow portion; 32. Positioning hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-5The utility model provides an embodiment: a vacuum brazing improved structure micro water-cooling plate, comprising a cover plate 1, a base plate 2 and a brazing sheet 3, the cover plate 1 and the base plate 2 are welded together by the brazing sheet 3, the micro water-cooling plate is composed of the cover plate 1 and the base plate 2, and the two are vacuum brazed and connected by the brazing sheet 3 to provide strength and stability, the cover plate 1 is located at the top, and the base plate 2 is located at the bottom. An upper flow channel 11 is opened on the bottom surface of the cover plate 1, and a lower flow channel 21 is opened on the surface of the base plate 2. The cross-sections of the upper flow channel 11 and the lower flow channel 21 are both arc-shaped, and the cross-sections of the upper flow channel 11 and the lower flow channel 21 form a complete circle with the cross-section of the brazing sheet 3. The upper flow channel 11 opened on the bottom surface of the cover plate 1 and the lower flow channel 21 opened on the surface of the base plate 2 are used to guide the cooling medium to flow inside the water-cooling plate.

[0033] Both sides of the substrate 2 are provided with communication ports 22, and the two groups of communication ports 22 are respectively connected to the two ends of the lower flow channel 21. The communication ports 22 opened on both sides of the substrate 2 are connected to the two ends of the lower flow channel 21 for the inlet and outlet of the cooling medium. A hollow portion 31 is opened on the surface of the brazing piece 3, and the hollow portion 31 corresponds to the position of the upper flow channel 11 and the lower flow channel 21. The hollow portion 31 opened on the brazing piece corresponds to the position of the upper flow channel 11 and the lower flow channel 21, providing a channel space to ensure that the cooling medium can flow smoothly.

[0034] The outline of the hollow part 31 is larger than the diameter of the upper flow channel 11 and the lower flow channel 21. The diameters of the upper flow channel 11 and the lower flow channel 21 are both 3 mm, and the diameter of the outline of the hollow part 31 is 3.5 mm. By setting the diameters and sizes of the upper flow channel 11, the lower flow channel 21 and the hollow part 31, it is ensured that the drill piece 3 will not block the flow channel and provide sufficient channel space to achieve an effective cooling effect.

[0035] A positioning column 12 is fixedly connected to the diagonal part of the bottom surface of the cover plate 1, a plug hole 23 is opened at the diagonal part of the surface of the base plate 2, and a positioning hole 32 is opened at the diagonal part of the surface of the drill bit 3. The positioning column 12 passes through the positioning hole 32 and is inserted into the plug hole 23. The positioning column 12 passes through the positioning hole 32 to realize the positioning of the drill bit 3. After the positioning column 12 passes through the positioning hole 32, it is inserted into the plug hole 23 to position the cover plate 1, thereby providing the accuracy of alignment and the stability of the structure during the manufacturing process.

[0036] Working principle: The cooling medium enters the lower flow channel 21 of the micro water-cooling plate from the connecting port 22. The connecting port 22 is connected to both ends of the lower flow channel 21 for the inlet and outlet of the cooling medium. The cooling medium flows in the lower flow channel 21 in the form of an arc-shaped cross section. The arc-shaped design of the cross section helps to reduce the flow resistance and improve the cooling effect. The cover plate 1 and the substrate 2 are connected by vacuum brazing through the brazing sheet 3. The brazing sheet 3 provides a connection with strength and stability between the cover plate 1 and the substrate 2. The cooling medium flows from the lower flow channel 21 into the upper flow channel 11 opened on the bottom surface of the cover plate 1. The upper flow channel 11 is also designed in the form of an arc-shaped cross section to ensure that the cooling medium has good flow performance during the flow process. A hollow portion 31 is opened on the surface of the brazing sheet 3, which corresponds to the position of the upper flow channel 11 and the lower flow channel 21. The hollow portion 31 provides additional channel space to ensure that the cooling medium can flow smoothly and avoid blockage. The cooling medium transfers heat to the cover plate 1 and the substrate 2 of the micro water-cooling plate through the brazing sheet 3 during the flow of the upper and lower flow channels 21. The cooling medium absorbs the heat from the heat source and takes the heat away to achieve the heat dissipation effect.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum brazing improved structure micro water-cooling plate, comprising a cover plate (1), a base plate (2) and a brazing sheet (3), characterized in that: The cover plate (1) and the base plate (2) are welded together via a brazing sheet (3); an upper flow channel (11) is provided on the bottom surface of the cover plate (1); a lower flow channel (21) is provided on the surface of the base plate (2); connecting openings (22) are provided on both sides of the base plate (2); two groups of connecting openings (22) are respectively connected to the two ends of the lower flow channel (21); and a hollow portion (31) is provided on the surface of the brazing sheet (3).

2. A vacuum brazing improved structure micro water cooling plate according to claim 1, characterized in that: A positioning column (12) is fixedly connected at the diagonal position of the bottom surface of the cover plate (1), an insertion hole (23) is opened at the diagonal position of the surface of the base plate (2), and a positioning hole (32) is opened at the diagonal position of the surface of the drill piece (3).

3. The vacuum brazing improved structure micro water cooling plate according to claim 1, characterized in that: The cross sections of the upper flow channel (11) and the lower flow channel (21) are both arc-shaped, and the cross sections of the upper flow channel (11) and the lower flow channel (21) and the cross section of the drill piece (3) form a complete circle.

4. The vacuum brazing improved structure micro water cooling plate according to claim 1, characterized in that: The outline of the hollowed-out portion (31) is larger than the diameters of the upper flow channel (11) and the lower flow channel (21).

5. A vacuum brazing improved structure micro water cooling plate according to claim 4, characterized in that: The diameters of the upper flow channel (11) and the lower flow channel (21) are both 3 mm, and the diameter of the outline of the hollow portion (31) is 3.5 mm.

6. The vacuum brazing improved structure micro water cooling plate according to claim 1, characterized in that: The hollowed-out portion (31) corresponds to the position of the upper flow channel (11) and the lower flow channel (21).

7. The vacuum brazing improved structure micro water cooling plate according to claim 2, characterized in that: The positioning column (12) passes through the positioning hole (32) and is inserted into the insertion hole (23).

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