A multi-segment spliced ​​metal heat sink

Abstract

This utility model discloses a multi-segment spliced ​​metal heat sink, comprising multiple detachably connected metal heat sink segments. Each metal heat sink segment includes a main substrate and heat dissipation fins vertically disposed on the surface of the main substrate. Adjacent metal heat sink segments are connected by a convex-concave mating structure. The convex-concave mating structure includes a boss at the rear end of the preceding metal heat sink segment and a groove at the front end of the following metal heat sink segment. The boss and the groove form an interference fit. The contact surface between the boss and the groove is coated with a thermally conductive adhesive layer with a thickness of 0.05-0.2mm. The multi-segment detachable design allows for flexible combination of lengths to adapt to different needs, saves space during transportation, and reduces costs by requiring only the replacement of damaged segments during maintenance. The convex-concave mating structure combined with the thermally conductive adhesive layer, along with the snap-fit ​​mechanism working in tandem with the convex-concave structure, reinforces the connection from the vertical direction, preventing loosening due to vibration and ensuring stable heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of heat sink technology, specifically a multi-segment spliced ​​metal heat sink. Background Technology

[0002] In electronic and mechanical equipment, heat sinks are crucial components for ensuring stable operation, and their heat dissipation efficiency directly affects equipment performance and lifespan. Currently, traditional heat sinks are mostly one-piece structures with fixed lengths, making it difficult to flexibly adjust their size to meet the heat dissipation needs of different devices. Furthermore, long, one-piece heat sinks are inconvenient to transport and install, requiring complete replacement for maintenance, resulting in high costs. While some modular heat sinks can solve the size compatibility problem, they suffer from structural defects: connections are prone to loosening, large contact gaps lead to a significant increase in thermal resistance, and heat transfer between segments is impeded; the heat dissipation fins are often designed with a single height and spacing, obstructing airflow and resulting in low convection heat dissipation efficiency; and the interface in contact with the heat source lacks an efficient heat-conducting structure, resulting in slow initial heat transfer and difficulty meeting the high-efficiency heat dissipation requirements of high-power devices. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a multi-segment spliced ​​metal heat sink, which can effectively solve the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A multi-segment spliced ​​metal heat sink includes multiple detachably connected metal heat sink segments. Each metal heat sink segment includes a main substrate and heat sink fins vertically disposed on the surface of the main substrate. Adjacent metal heat sink segments are connected by a convex-concave mating structure. The convex-concave mating structure includes a boss at the rear end of the preceding metal heat sink segment and a groove at the front end of the following metal heat sink segment. The boss and the groove form an interference fit. The contact surface between the boss and the groove is coated with a thermally conductive adhesive layer with a thickness of 0.05-0.2 mm.

[0006] As a further description of the above technical solution, the cross-section of the boss is trapezoidal or dovetail-shaped, and the shape of the groove matches the boss.

[0007] As a further description of the above technical solution, the height direction of the boss is consistent with the extension direction of the heat dissipation fin assembly.

[0008] As a further description of the above technical solution, the two sides of the metal heat dissipation section are also provided with elastic buckles. The elastic buckles include elastic arms integrally formed with the main substrate and hooks provided at the free ends of the elastic arms. The hooks of adjacent metal heat dissipation sections are engaged with each other.

[0009] As a further description of the above technical solution, the elastic buckle and the concave-convex mating structure are symmetrically distributed at the connection end of the metal heat dissipation section, and the buckling direction of the elastic buckle is perpendicular to the insertion direction of the protrusion.

[0010] As a further description of the above technical solution, the heat dissipation fin group includes main fins and auxiliary fins arranged in parallel at intervals, and the height of the main fins is greater than the height of the auxiliary fins.

[0011] As a further description of the above technical solution, the spacing between the main fins is 1.5-3mm, the spacing between the auxiliary fins is 0.8-1.2mm, and the height difference between the main fins and the auxiliary fins is 2-5mm.

[0012] As a further description of the above technical solution, the bottom surface of the main substrate is provided with a thermally conductive pad with a thickness of 0.1-0.5mm, and the thermally conductive pad is a graphene film or an aluminum nitride ceramic sheet.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The multi-segment spliced ​​metal heat sink of this utility model has at least one of the following beneficial effects during use:

[0015] Featuring a multi-segment detachable design, the length can be flexibly combined to adapt to different needs, saving space during transportation. Maintenance only requires replacing damaged segments, reducing costs. The concave-convex mating structure combined with the thermally conductive adhesive layer, with an interference fit to reduce contact gaps and the adhesive layer filling micro-gaps, significantly reduces contact thermal resistance and ensures smooth heat transfer between segments. The elastic buckle works in conjunction with the concave-convex structure to reinforce the connection from the vertical direction, preventing vibration and loosening and ensuring heat dissipation stability. The height difference and spacing design of the main and auxiliary fins increase the heat dissipation area and optimize airflow, improving convection efficiency. The graphene or aluminum nitride thermal pad on the bottom reduces initial thermal resistance, accelerates heat introduction, and improves the overall heat dissipation response speed and efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a multi-segment spliced ​​metal heat sink according to the present invention;

[0017] Figure 2 This is a side view of a multi-segment spliced ​​metal heat sink according to the present invention.

[0018] Figure 3 This is a first perspective structural diagram of a multi-segment spliced ​​metal heat sink according to the present invention;

[0019] Figure 4 This is a second perspective structural diagram of a multi-segment spliced ​​metal heat sink according to the present invention.

[0020] Numbering on the map:

[0021] 1. Metal heat dissipation section; 101. Heat dissipation fin assembly; 102. Main substrate; 103. Thermal pad; 104. Main fin; 105. Auxiliary fin; 2. Concave-convex mating structure; 201. Elastic buckle; 202. Boss; 203. Groove; 204. Elastic arm. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-4 As shown, this utility model provides a multi-segment spliced ​​metal heat sink, including multiple detachably connected metal heat sink segments 1. Each metal heat sink segment 1 includes a main substrate 102 and a heat sink fin assembly 101 vertically disposed on the surface of the main substrate 102. Adjacent metal heat sink segments 1 are connected by a concave-convex fitting structure 2. The concave-convex fitting structure 2 includes a boss 202 disposed at the rear end of the preceding metal heat sink segment 1 and a groove 203 disposed at the front end of the following metal heat sink segment 1. The boss 202 and the groove 203 form an interference fit. The contact surface of the boss 202 and the groove 203 is coated with a thermally conductive adhesive layer with a thickness of 0.05-0.2 mm.

[0024] In this embodiment, when the heat sink comes into contact with the heat source, the heat is first transferred to the main substrate 102 through the 0.1-0.5mm thick thermally conductive pad 103 (graphene film or aluminum nitride ceramic sheet) on the bottom surface of the main substrate 102. The excellent thermal conductivity of these two materials can quickly transfer the heat from the heat source to the main substrate 102.

[0025] After receiving heat, the main substrate 102 evenly conducts it to the heat dissipation fin assembly 101 on its surface. The main fins 104 and auxiliary fins 105 in the heat dissipation fin assembly 101 dissipate heat to the surrounding environment through convection with the air, completing the core heat dissipation process. The main fins 104 are taller than the auxiliary fins 105, and the spacing between the main fins 104 and auxiliary fins 105 is 1.5-3 mm, while the spacing between the auxiliary fins 105 is 0.8-1.2 mm. This design allows for a more efficient airflow channel within a limited space, improving heat dissipation efficiency.

[0026] Adjacent metal heat dissipation sections 1 are tightly connected by the interference fit between the boss 202 and the groove 203, reducing contact gaps. At the same time, a 0.05-0.2mm thick thermally conductive adhesive layer fills the tiny gaps on the contact surface, reducing contact thermal resistance and allowing heat to be smoothly transferred between the metal heat dissipation sections 1, ensuring the continuity of overall heat dissipation.

[0027] The elastic clips 201 on both sides of the metal heat dissipation section 1 have hooks that interlock with each other, with the interlocking direction perpendicular to the insertion direction of the boss 202, and are symmetrically distributed with the convex-concave mating structure 2. This further enhances the stability of the connection between adjacent heat dissipation sections, prevents the connection from loosening due to vibration or other factors, avoids contact gaps affecting heat transfer, and ensures heat dissipation stability.

[0028] Furthermore, the cross-section of the boss 202 is trapezoidal or dovetail-shaped, and the shape of the groove 203 matches that of the boss 202. A multi-segment detachable connection is adopted, allowing for disassembly during transportation to save space; during installation, the length can be flexibly combined according to requirements; if a segment is damaged, only the corresponding segment needs to be replaced, eliminating the need for overall replacement and reducing maintenance costs. The interference fit between the boss 202 and the groove 203 ensures tight contact, and combined with the use of a thermally conductive adhesive layer, significantly reduces contact thermal resistance, improves the heat transfer efficiency between adjacent heat dissipation segments, and ensures excellent overall heat dissipation performance.

[0029] Furthermore, the height direction of the boss 202 is consistent with the extension direction of the heat dissipation fin assembly 101. The two sides of the metal heat dissipation section 1 are also provided with elastic clips 201. Each elastic clip 201 includes an elastic arm 204 integrally formed with the main substrate 102 and a hook at the free end of the elastic arm 204. The hooks of adjacent metal heat dissipation sections 1 engage with each other. The elastic clips 201 and the convex-concave mating structure 2 work together to reinforce the connection from different directions, effectively preventing the heat sink from loosening due to vibration during use, ensuring the stability of heat transfer and the service life of the heat sink.

[0030] Furthermore, the elastic buckle 201 and the concave-convex mating structure 2 are symmetrically distributed at the connection end of the metal heat dissipation section 1, and the buckling direction of the elastic buckle 201 is perpendicular to the insertion direction of the boss 202.

[0031] Furthermore, the heat dissipation fin assembly 101 includes main fins 104 and auxiliary fins 105 arranged in parallel intervals, and the height of the main fins 104 is greater than the height of the auxiliary fins 105.

[0032] Furthermore, the spacing between the main fins 104 is 1.5-3mm, the spacing between the auxiliary fins 105 is 0.8-1.2mm, and the height difference between the main fins 104 and the auxiliary fins 105 is 2-5mm.

[0033] The height difference (2-5mm) and spacing design between the main fins 104 and auxiliary fins 105 in the heat dissipation fin assembly 101 increases the heat dissipation area, optimizes airflow, improves the convective heat transfer efficiency with the air, and enhances the heat dissipation effect.

[0034] Furthermore, the bottom surface of the main substrate 102 is provided with a thermally conductive pad 103 with a thickness of 0.1-0.5 mm. The thermally conductive pad 103 is a graphene film or an aluminum nitride ceramic sheet. The use of graphene film or aluminum nitride ceramic sheet for the thermally conductive pad 103 on the bottom surface of the main substrate 102 allows it to closely adhere to the heat source, reducing thermal resistance in the initial stage of heat transfer, enabling heat to be quickly transferred to the heat sink, and improving the overall heat dissipation response speed.

[0035] 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.

Claims

1. A multi-segmented, spliced metal fin, characterized by: The device includes multiple detachably connected metal heat dissipation sections. Each metal heat dissipation section includes a main substrate and heat dissipation fins vertically disposed on the surface of the main substrate. Adjacent metal heat dissipation sections are connected by a convex-concave mating structure. The convex-concave mating structure includes a boss at the rear end of the preceding metal heat dissipation section and a groove at the front end of the following metal heat dissipation section. The boss and the groove form an interference fit. The contact surface between the boss and the groove is coated with a thermally conductive adhesive layer with a thickness of 0.05-0.2 mm.

2. The multi-section spliced metal heat dissipation sheet according to claim 1, wherein: The cross-section of the boss is trapezoidal or dovetail-shaped, and the shape of the groove matches the shape of the boss.

3. The multi-section split metal fin of claim 1, wherein: The height of the boss is aligned with the extension direction of the heat dissipation fin assembly.

4. The multi-section split metal fin of claim 1, wherein: The metal heat dissipation section is also provided with elastic buckles on both sides. The elastic buckles include elastic arms integrally formed with the main substrate and hooks provided at the free ends of the elastic arms. The hooks of adjacent metal heat dissipation sections are engaged with each other.

5. The multi-section spliced metal heat sink according to claim 4, wherein: The elastic buckle and the concave-convex mating structure are symmetrically distributed at the connection end of the metal heat dissipation section, and the buckling direction of the elastic buckle is perpendicular to the insertion direction of the protrusion.

6. The multi-section split metal fin of claim 1, wherein: The heat dissipation fin assembly includes main fins and auxiliary fins arranged in parallel intervals, wherein the height of the main fins is greater than the height of the auxiliary fins.

7. The multi-section spliced metal heat sink according to claim 6, wherein: The spacing between the main fins is 1.5-3mm, the spacing between the auxiliary fins is 0.8-1.2mm, and the height difference between the main fins and the auxiliary fins is 2-5mm.

8. The multi-section split metal fin of claim 1, wherein: The bottom surface of the main substrate is provided with a thermally conductive pad with a thickness of 0.1-0.5 mm, which is a graphene film or an aluminum nitride ceramic sheet.

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