A high-efficiency heat sink with gradient-pitched fins

Abstract

This utility model discloses a high-efficiency heat sink with gradually spaced fins, including a substrate and multiple heat dissipation fins disposed on the substrate. The multiple heat dissipation fins are arranged along the direction of heat dissipation airflow, and the spacing between adjacent heat dissipation fins gradually increases from the inlet end to the outlet end of the heat sink along the direction of heat dissipation airflow. The roots of the heat dissipation fins are fixedly connected to the upper surface of the substrate, and the main body of the heat dissipation fins extends perpendicularly to the plane of the substrate. In a cross-section perpendicular to the direction of heat dissipation airflow, the extension direction of the heat dissipation fins forms an angle of ≤15° with the normal direction of the substrate, and the heat dissipation fins as a whole form a flow-guiding inclined surface. Through the synergistic effect of the substrate, heat dissipation fins, heat pipes (optional), and auxiliary airflow-dissipating structures, efficient heat transfer and dissipation are achieved.

Description

Technical Field

[0001] This utility model relates to the field of heat sink technology, specifically a high-efficiency heat sink with fins of gradually varying spacing. Background Technology

[0002] In electronic equipment, power systems, and other fields, heat sinks are key components ensuring stable equipment operation. As equipment power density continues to increase, the heat generated by heat sources also rises, placing higher demands on the heat dissipation efficiency of heat sinks. Existing heat sinks mostly employ a uniformly spaced fin design, which has significant drawbacks: First, while heat is concentrated in the core heat source area, the uniformly spaced fins cannot provide sufficient heat exchange area at the inlet, leading to heat accumulation. Second, the fins are mostly perpendicular to the substrate, resulting in significant airflow impact loss and severe energy loss, reducing heat exchange efficiency. Third, in high heat flux density scenarios, the heat transfer path is singular, relying solely on conduction between the substrate and fins, easily leading to heat dissipation bottlenecks. Fourth, the lack of effective airflow turbulence structures results in smooth airflow between the fins, insufficient contact with the fin surface, further limiting heat dissipation performance. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a high-efficiency heat sink with fins of gradually varying spacing, 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 high-efficiency heat sink with gradually spaced fins includes a substrate and a plurality of heat sink fins disposed on the substrate. The plurality of heat sink fins are arranged along the direction of heat dissipation airflow, and the spacing between adjacent heat sink fins gradually increases from the heat sink inlet end to the heat sink outlet end along the direction of heat dissipation airflow.

[0006] The root of the heat dissipation fin is fixedly connected to the upper surface of the substrate. The main body of the heat dissipation fin extends perpendicularly to the plane of the substrate. On a cross section perpendicular to the direction of the heat dissipation airflow, the extension direction of the heat dissipation fin forms an angle of ≤15° with the normal direction of the substrate. The heat dissipation fin as a whole forms a flow-guiding inclined surface.

[0007] As a further description of the above technical solution, the spacing of the heat dissipation fins is less than the sum of the minimum fin spacing at the outlet end of the heat sink and the maximum fin spacing at the inlet end of the heat sink.

[0008] As a further description of the above technical solution, the lower surface of the substrate is provided with a mounting plane for contacting a heat source, and the inlet end of the heat sink is located in the projection area of ​​the mounting plane and corresponds to or is adjacent to the heat-generating center area of ​​the heat source.

[0009] As a further description of the above technical solution, it also includes at least one heat pipe, the evaporation section of which is embedded and fixed to the lower surface of the substrate, and the condensation section of which is inserted through a portion of a plurality of heat dissipation fins arranged at gradually increasing intervals.

[0010] As a further description of the above technical solution, the condensation section of the heat pipe is mainly installed in the area of ​​the heat dissipation fins with small spacing near the inlet end of the radiator.

[0011] As a further description of the above technical solution, the thickness of the heat dissipation fins gradually decreases from the inlet end of the radiator to the outlet end of the radiator along the direction of the heat dissipation airflow.

[0012] As a further description of the above technical solution, an auxiliary turbulence structure is provided between adjacent heat dissipation fins, and the auxiliary turbulence structure is in the form of a wave pattern.

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

[0014] This utility model discloses a high-efficiency heat sink with gradually spaced fins, which has at least one of the following beneficial effects during use:

[0015] Firstly, the spacing between the heat dissipation fins gradually increases from the inlet to the outlet along the airflow direction. The smaller spacing at the inlet quickly removes concentrated heat from the core area of ​​the heat source, while the larger spacing at the outlet effectively reduces airflow resistance. Combined with the design that "the spacing is less than the sum of the inlet and outlet spacing," this balances heat dissipation efficiency and airflow smoothness, preventing heat accumulation and flow attenuation. Secondly, the fins have a ≤15° guiding slope, reducing airflow impact loss and ensuring airflow stability and heat exchange continuity. Thirdly, the inlet end corresponds to the heat source's heating center, and the heat pipe condensation section is concentrated in the small-spacing fin area at the inlet, enhancing heat transfer in high-heat areas and adapting to high heat flux density scenarios. In addition, the gradually decreasing fin thickness design reduces weight and optimizes the rear airflow while ensuring the structural strength of the inlet; the corrugated turbulence structure between adjacent fins enhances airflow turbulence, improves the fin surface contact, comprehensively improves heat dissipation performance, and ensures stable equipment operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency heat sink with gradually spaced fins according to the present invention.

[0017] Figure 2 This is a top view of a high-efficiency heat sink with gradually spaced fins according to the present invention.

[0018] Figure 3 This is a bottom view of the structure of a high-efficiency heat sink with gradually spaced fins according to the present invention.

[0019] Figure 4 This is a perspective structural diagram of a high-efficiency heat sink with gradually spaced fins according to the present invention.

[0020] Numbering on the map:

[0021] 1. Substrate; 2. Heat dissipation fins; 3. Heat pipes; 4. Condensation section; 5. Mounting plane; 6. Evaporation section; 7. Guided inclined surface; 8. Auxiliary turbulence structure. 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 high-efficiency heat sink with fins of gradually varying spacing, including a substrate 1 and a plurality of heat sink fins 2 disposed on the substrate 1. The plurality of heat sink fins 2 are arranged along the direction of heat dissipation airflow, and the spacing between adjacent heat sink fins 2 gradually increases from the heat sink inlet end to the heat sink outlet end along the direction of heat dissipation airflow.

[0024] In this embodiment, the heat source transfers heat to the substrate 1 through the mounting plane 5 on the lower surface of the substrate 1. Since the heat sink inlet is located within the projection area of ​​the mounting plane 5 and corresponds to or is adjacent to the heat generation center area of ​​the heat source, the core heat generated by the heat source can be quickly conducted to the corresponding area of ​​the inlet end of the substrate 1.

[0025] The root of the heat dissipation fin 2 is fixedly connected to the upper surface of the substrate 1. The main body of the heat dissipation fin 2 extends perpendicularly to the plane of the substrate 1. On the cross section perpendicular to the direction of the heat dissipation airflow, the extension direction of the heat dissipation fin 2 forms an angle of ≤15° with the normal direction of the substrate 1. The heat dissipation fin 2 as a whole forms a flow guiding inclined surface 7.

[0026] The substrate 1 absorbs heat and transfers it to the heat dissipation fins 2 fixedly connected to its upper surface. The roots of the heat dissipation fins 2 are fixedly connected to the substrate 1, ensuring the stability and efficiency of heat transfer. Heat is transferred from the substrate 1 to various parts of the heat dissipation fins 2 through thermal conduction.

[0027] The cooling airflow flows in a specific direction, passing through multiple cooling fins 2 arranged along the airflow direction. At the radiator inlet, the spacing between adjacent cooling fins 2 is small, resulting in a faster airflow velocity that allows for rapid heat exchange with the hotter fins, quickly removing a large amount of heat. As the airflow moves towards the radiator outlet, the spacing between adjacent cooling fins 2 gradually increases, reducing airflow resistance and allowing the airflow to pass more smoothly through the cooling fin area, continuously exchanging heat with the fins.

[0028] Meanwhile, on a cross-section perpendicular to the direction of the heat dissipation airflow, the extension direction of the heat dissipation fins 2 forms an angle of ≤15° with the normal direction of the substrate 1, thus forming a guide inclined surface 7. This inclined surface can guide the airflow to flow more smoothly over the fins, reduce energy loss caused by airflow impact, ensure the stability and continuity of the airflow during the flow process, and improve heat exchange efficiency.

[0029] Furthermore, the spacing of the heat dissipation fins 2 is less than the sum of the minimum fin spacing at the outlet end and the maximum fin spacing at the inlet end of the radiator. The spacing between adjacent heat dissipation fins 2 gradually increases from the inlet end to the outlet end along the airflow direction, and the fin spacing is less than the sum of the minimum spacing at the outlet end and the maximum spacing at the inlet end. The small spacing at the inlet end ensures efficient absorption and dissipation of core heat. As the airflow flows, the gradually increasing spacing reduces airflow resistance, allowing the airflow to flow smoothly through the entire heat dissipation fin area 2, ensuring an improvement in the overall heat dissipation efficiency of the radiator and avoiding the problem of reduced airflow and decreased heat dissipation capacity due to excessive resistance.

[0030] Furthermore, the lower surface of the substrate 1 is provided with a mounting plane 5 for contacting the heat source. The inlet end of the heat sink is located within the projection area of ​​the mounting plane 5 and corresponds to or is adjacent to the heat-generating center area of ​​the heat source. The heat sink inlet end is located within the projection area of ​​the mounting plane 5 and corresponds to or is adjacent to the heat-generating center area of ​​the heat source, while the spacing between the heat dissipation fins 2 at the inlet end is relatively small. This allows a large amount of heat to be quickly carried away in the core area where heat is most concentrated through rapid airflow, effectively preventing heat accumulation in the core area of ​​the heat source.

[0031] Furthermore, it also includes at least one heat pipe 3, the evaporation section 6 of which is embedded and fixed to the lower surface of the substrate 1, and the condensation section 4 of which is inserted into a portion of a plurality of heat dissipation fins 2 arranged at gradually increasing intervals.

[0032] When the heat sink is equipped with heat pipes 3, the evaporation section 6 of the heat pipe 3 is embedded and fixed to the lower surface of the substrate 1, enabling it to quickly absorb heat from the substrate 1 and transfer the heat to the condensation section 4 through the phase change of the working fluid inside the heat pipe 3. The condensation section 4 of the heat pipe 3 passes through a portion of the multiple heat dissipation fins 2, and mainly passes through the area of ​​the heat dissipation fins 2 with smaller spacing near the inlet end of the heat sink. This allows more heat to be transferred to the heat dissipation fins 2 through the heat pipe 3 in the inlet end area where heat is more concentrated, further enhancing the heat dissipation capacity of this area.

[0033] Furthermore, the condensation section 4 of the heat pipe 3 is mainly located in the area of ​​the heat dissipation fins 2 with smaller spacing, near the inlet end of the radiator. The arrangement of the heat pipe 3 further enhances the heat transfer capability of the radiator. After the evaporation section 6 of the heat pipe 3 absorbs heat from the substrate 1, it transfers the heat to the heat dissipation fins 2 through the condensation section 4, which is mainly located in the area of ​​the fins with smaller spacing near the inlet end. This allows for faster heat transfer to the fins for dissipation in high-heat areas, effectively improving the speed and efficiency of heat transfer, and is particularly suitable for heat source heat dissipation scenarios with high heat flux density.

[0034] Furthermore, the thickness of the heat dissipation fins 2 gradually decreases from the inlet end to the outlet end of the radiator along the direction of the heat dissipation airflow. This design ensures that the fins at the inlet end have sufficient heat dissipation capacity and structural strength while reducing the overall weight of the radiator and facilitating smooth airflow at the rear end.

[0035] Furthermore, an auxiliary turbulence structure 8 is provided between adjacent heat dissipation fins 2. This auxiliary turbulence structure 8 has a wave-like ripple shape. The wave-like auxiliary turbulence structure 8 between adjacent heat dissipation fins 2 can disturb the flowing airflow. This disturbance increases the turbulence of the airflow, allowing for more thorough contact between the airflow and the surface of the heat dissipation fins 2, increasing the heat exchange area and heat exchange intensity, thereby improving the heat exchange efficiency between the heat dissipation fins 2 and the airflow.

[0036] 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 high-efficiency heat sink with gradually spaced fins, comprising a substrate and a plurality of heat dissipation fins disposed on the substrate, characterized in that, The plurality of heat dissipation fins are arranged along the direction of heat dissipation airflow, and the spacing between adjacent heat dissipation fins gradually increases from the inlet end to the outlet end of the radiator along the direction of heat dissipation airflow. The root of the heat dissipation fin is fixedly connected to the upper surface of the substrate. The main body of the heat dissipation fin extends perpendicularly to the plane of the substrate. On a cross section perpendicular to the direction of the heat dissipation airflow, the extension direction of the heat dissipation fin forms an angle of ≤15° with the normal direction of the substrate. The heat dissipation fin as a whole forms a flow-guiding inclined surface.

2. The high-efficiency heat sink with gradually spaced fins according to claim 1, characterized in that: The spacing between the heat dissipation fins is less than the sum of the minimum fin spacing at the outlet end of the radiator and the maximum fin spacing at the inlet end of the radiator.

3. A high-efficiency heat sink with gradually spaced fins according to claim 1, characterized in that: The lower surface of the substrate is provided with a mounting plane for contacting a heat source. The inlet end of the heat sink is located within the projection area of ​​the mounting plane and corresponds to or is adjacent to the heat-generating center area of ​​the heat source.

4. A high-efficiency heat sink with gradually spaced fins according to claim 1, characterized in that: It also includes at least one heat pipe, the evaporation section of which is embedded and fixed to the lower surface of the substrate, and the condensation section of which is inserted through a portion of a plurality of heat dissipation fins arranged at gradually increasing intervals.

5. A high-efficiency heat sink with gradually spaced fins according to claim 4, characterized in that: The condensation section of the heat pipe is mainly installed in the area of ​​the heat dissipation fins with small spacing, near the inlet end of the radiator.

6. A high-efficiency heat sink with gradually spaced fins according to claim 1, characterized in that: The thickness of the heat dissipation fins gradually decreases from the inlet end to the outlet end of the radiator along the direction of the heat dissipation airflow.

7. A high-efficiency heat sink with gradually spaced fins according to claim 1, characterized in that: An auxiliary turbulence structure is provided between adjacent heat dissipation fins, and the auxiliary turbulence structure is in the form of a wave pattern.

Images