A double-curved array cold head

Abstract

The utility model provides a kind of double curved surface array cold head, heat exchange sheet includes multiple periodic arrangement curved surface unit, each curved surface unit is formed by four identical curvature curved surface and is surrounded to form convex structure, adjacent curved surface unit is rotated staggered arrangement in horizontal projection plane, forms the array of cross intersection's double curvature flow channel, so that flow channel width is widened, effectively prevent blockage;The curved surface unit of double curvature generates orthogonal secondary vortex, significantly improves heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling technology, and more specifically, to a high-efficiency hyperboloid array cold head for heat dissipation of high power density electronic devices. Background Technology

[0002] With the continuous increase in power density of electronic devices, traditional shovel-tooth structure liquid cooling heads have faced heat dissipation bottlenecks. Existing technologies for shovel-tooth cold heads suffer from the following drawbacks: narrow flow channel gaps (50mm), prone to clogging and requiring high machining precision; weak tooth structure, easily deformed during processing and transportation; upper limit of heat transfer flux density of approximately 100W / cm² (inlet water temperature 40℃, TJ 75℃); and complex internal cavity structure, hindering surface treatment and cleaning. Summary of the Invention

[0003] In view of this, the present invention provides a hyperboloid array cold head, which effectively solves the above-mentioned technical problems through an innovative 40-array design of curved units.

[0004] A hyperboloid array cold head includes two water nozzles 10, a top cover 20, and a heat exchange fin base surface 30. The two water nozzles 10 are respectively mounted on the upper surface of the top cover 20. The top cover 20 and the heat exchange fin base surface 30 cover each other to form a receiving chamber for installing the heat exchange fins. The water nozzles 10 are used for the inlet and outlet of the heat exchange medium. The heat exchange fins include a plurality of periodically arranged curved surface units 40. Each curved surface unit 40 is surrounded by four curved surfaces with the same curvature to form a raised structure. The lowest and highest points of the curved surfaces of the same curved surface unit 40 form a cross-section with uniform cross-section. The structure is square. The cross-sectional area enclosed by the lowest point of the surface of the same curved unit 40 is larger than the cross-sectional area enclosed by the highest point of the surface of the same curved unit 40. Adjacent curved units 40 are arranged in a 90° rotational staggered arrangement in the horizontal projection plane to form a cross-shaped array of double curvature flow channels 50. Compared with the flow channel 50 formed by the toothed plate, the flow channel 50 is wider to prevent clogging. It can generate orthogonal secondary vortices in the fluid, break the thermal boundary layer and reduce flow resistance at the same time, and achieve the unity of high heat flux density and anti-clogging, which is beneficial to surface treatment and cleaning.

[0005] Furthermore, the protruding structure is a curved surface unit 40 resembling a conical cylinder. The conical transition shape allows the fluid to continuously accelerate and separate along the curved surface, increasing the heat exchange area compared to a planar shovel tooth, and avoiding stress concentration caused by sharp edges, thus preventing deformation.

[0006] Furthermore, the surfaces of all surface units 40 are generated using a unified formula curve to maintain the consistency of the surface profile, ensure the geometric consistency of all surface units 40, eliminate flow field distortion caused by random processing errors, and improve the uniformity of temperature difference distribution.

[0007] Furthermore, the lowest point of the surface of each curved unit 40 is tangent to the base surface 30 of the heat exchange plate, so that the bottom edge of the surface of each curved unit 40 is smoothly connected to the base surface 30 of the heat exchange plate. The curvature at the connection is continuous, and the continuous curvature connection eliminates the root thermal resistance dead angle of the shovel tooth structure, improves the heat conduction efficiency of the base surface, and prevents micro-cracks at the brazing interface.

[0008] Furthermore, the heat exchange plates are symmetrically arranged with respect to the center line of the heat exchange plate base surface 30, and the fully symmetrical topology of the flow channel 50 allows the inlet and outlet to be interchanged, improving the installation tolerance.

[0009] Furthermore, the inlet and outlet of the water nozzle 10 can be used interchangeably, thus removing the flow direction restriction.

[0010] Furthermore, the heat exchange plates are manufactured by milling, gear shaping, powder injection molding, or forging processes. The applicability of milling / forging and other processes reduces mass production costs and improves processing efficiency compared to single-piece gear shaping.

[0011] Furthermore, the cold head material is oxygen-free copper or pure copper.

[0012] Furthermore, the water nozzle 10 and the upper cover 20, and the heat exchange plate base surface 30 and the upper cover 20 are all welded together by brazing or friction stir welding.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a hyperboloid array cold head, the heat exchange plate includes multiple periodically arranged curved surface units 40, each curved surface unit 40 is surrounded by four curved surfaces with the same curvature to form a raised structure, adjacent curved surface units 40 are arranged in a 90° rotational staggered arrangement in the horizontal projection plane to form a cross-shaped array of hyperboloid flow channels 50, which widens the flow channels 50 and effectively prevents blockage; the hyperboloid curved surface units 40 generate orthogonal secondary vortices, which significantly improves heat exchange efficiency; the structural strength is improved and the resistance to deformation is enhanced; the processing technology is simplified and the production efficiency is improved; the installation direction is not restricted and it is more convenient to use. Attached Figure Description

[0014] Figure 1 This is an exploded view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the arrangement of surface units; Figure 3 for Figure 2 A magnified view of a portion of the heat exchanger fins.

[0015] Explanation of main component symbols Water nozzle 10; top cover 20; heat exchange fin base surface 30; curved unit 40; flow channel 50.

[0016] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0017] Example: like Figure 1-3 As shown, a hyperboloid array cold head includes two water nozzles 10, a top cover 20, and a heat exchange fin base surface 30. The two water nozzles 10 are respectively mounted on the upper surface of the top cover 20. The top cover 20 and the heat exchange fin base surface 30 cover each other to form a receiving chamber. The receiving chamber is used to install the heat exchange fins. The water nozzles 10 are used for the inlet and outlet of the heat exchange medium. The heat exchange fins include a plurality of periodically arranged curved surface units 40. Each curved surface unit 40 is surrounded by four curved surfaces with the same curvature to form a raised structure. Within the same curved surface unit... The bottom and top points of the 40 curved surface form a structure with square cross-sections. The cross-sectional area enclosed by the bottom point of the same curved surface unit 40 is larger than that enclosed by the top point. Adjacent curved surface units 40 are arranged in a 90° rotational staggered pattern in the horizontal projection plane, forming a cross-shaped array of double-curvature flow channels 50. Compared to the flow channel 50 formed by the toothed plates, the flow channel 50 is wider to prevent clogging; it can generate orthogonal secondary vortices in the fluid, breaking the flow. The thermal boundary layer reduces flow resistance, achieving a balance between high heat flux density and anti-clogging. The protruding structure is a conical cylindrical curved surface unit 40. The conical transition shape allows the fluid to continuously accelerate and separate along the curved surface, increasing the heat exchange area compared to planar toothed structures, and avoiding stress concentration caused by sharp edges, thus preventing deformation. The curved surfaces of all curved surface units 40 are generated using a unified formula curve, maintaining consistent surface contours and ensuring geometric consistency of all curved surface units 40. This eliminates flow field distortion caused by random processing errors and improves the uniformity of temperature distribution. The lowest point of the curved surface of each curved surface unit 40 is tangent to the heat exchange plate base surface 30, allowing for a smooth transition between the bottom edge of the curved surface of each curved surface unit 40 and the heat exchange plate base surface 30. The curvature at the connection point is continuous, eliminating the thermal resistance dead angle at the root of the toothed structure, improving the heat conduction efficiency of the base surface, and preventing micro-cracks at the brazing interface. The heat exchange plate is symmetrically arranged relative to the centerline of the heat exchange plate base surface 30. The fully symmetrical topology of the flow channel 50 allows for interchangeability of the inlet and outlet, improving installation tolerance.

[0018] The inlet and outlet of the water nozzle 10 are interchangeable, removing flow direction restrictions. The heat exchange plate is manufactured by milling, gear shaping, powder injection molding or forging processes. The applicability of milling / forging and other processes reduces mass production costs and improves processing efficiency compared to single-piece processing with shovel teeth.

[0019] The cold head material is oxygen-free copper or pure copper. The water nozzle 10 and the upper cover 20, and the heat exchange plate base surface 30 and the upper cover 20 are all welded together by brazing or friction stir welding.

[0020] Taking a 25mm×30mm cold head as an example, in the heat dissipation test of a chip with a TDP of 700W, using deionized water as the cooling medium, with an inlet water temperature of 40℃ and a flow rate of 1.5L / min: Traditional toothed cold head: chip junction temperature 72.3℃, voltage drop 10301.9Pa; The cold head of this application: chip junction temperature 68.21℃, which is 4.09℃ lower than the traditional toothed cold head, and voltage drop 9805.1Pa, which is 496.8Pa lower than the traditional toothed cold head.

[0021] The above embodiments demonstrate that this application effectively reduces flow resistance while improving heat dissipation performance, demonstrating significant progress.

[0022] This invention provides a hyperboloid array cold head, the heat exchange plate comprising multiple periodically arranged curved surface units 40. Each curved surface unit 40 is formed by four curved surfaces with the same curvature surrounding a raised structure. Adjacent curved surface units 40 are arranged in a 90° rotational staggered arrangement in the horizontal projection plane, forming a cross-shaped array of hyperboloid flow channels 50, which widens the flow channels 50 and effectively prevents blockage. The hyperboloid curved surface units 40 generate orthogonal secondary vortices, significantly improving heat exchange efficiency. The structural strength is improved, and the deformation resistance is enhanced. The processing technology is simplified, and the production efficiency is improved. The installation direction is unrestricted, making it more convenient to use.

[0023] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A hyperboloid array cold head, comprising two water nozzles (10), an upper cover (20), and a heat exchange fin base surface (30), wherein the two water nozzles (10) are respectively mounted on the upper surface of the upper cover (20), and the upper cover (20) and the heat exchange fin base surface (30) cover each other to form a receiving chamber, the receiving chamber being used to install heat exchange fins, and the water nozzles (10) being used for the inlet and outlet of heat exchange medium, characterized in that: The heat exchange plate includes multiple periodically arranged curved surface units (40). Each curved surface unit (40) is surrounded by four curved surfaces with the same curvature to form a raised structure. The bottom point and the top point of the curved surface of the same curved surface unit (40) are surrounded to form a structure with a square cross section. The cross-sectional area of ​​the bottom point of the curved surface of the same curved surface unit (40) is greater than the cross-sectional area of ​​the top point of the curved surface of the same curved surface unit (40). Adjacent curved surface units (40) are arranged in a 90° rotational staggered arrangement in the horizontal projection plane to form a cross-shaped array of double curvature flow channels (50).

2. The hyperboloid array cold head according to claim 1, characterized in that: The protruding structure is a curved surface unit (40) resembling a cone or cylinder.

3. The hyperboloid array cold head according to claim 1, characterized in that: The surfaces of all surface units (40) are generated by a unified formula curve to maintain the consistency of the surface profile.

4. The hyperboloid array cold head according to claim 1, characterized in that: The bottom point of the surface of each surface unit (40) is tangent to the heat exchange plate base surface (30), so that the bottom edge of the surface of each surface unit (40) is smoothly connected to the heat exchange plate base surface (30), and the curvature at the connection is continuous.

5. The hyperboloid array cold head according to claim 1, characterized in that: The heat exchange plates are arranged symmetrically with respect to the center line of the heat exchange plate base surface (30).

6. The hyperboloid array cold head according to claim 1, characterized in that: The inlet and outlet of the water nozzle (10) can be used interchangeably.

7. The hyperboloid array cold head according to claim 1, characterized in that: The heat exchange plates are manufactured by milling, tooth shaping, powder injection molding or forging processes.

8. The hyperboloid array cold head according to claim 1, characterized in that: The cold head material is oxygen-free copper or pure copper.

9. The hyperboloid array cold head according to claim 1, characterized in that: The water nozzle (10) and the top cover (20), and the heat exchange plate base surface (30) and the top cover (20) are all welded together by brazing or friction stir welding.

Images