Radiator fin combination structure

Abstract

The utility model discloses a radiator fin combination structure which comprises a substrate with a mounting plane extending along the length direction, a plurality of main radiating fins vertically arranged on the substrate and a plurality of auxiliary radiating units, a first radiating channel is formed between every two adjacent main radiating fins, and a second radiating channel is formed between every two adjacent auxiliary radiating units. Second heat dissipation channels communicated with the first heat dissipation channels are formed between the adjacent auxiliary heat dissipation units. The herringbone auxiliary fins and the main radiating fins form a first radiating channel and a second radiating channel which are communicated with each other, the effective radiating area is enlarged through the included angle layout, and radiating airflow is guided to form turbulent flow in cooperation with the bending angle of the flow guide part and fin flow dividing bodies, so that the heat exchange efficiency is improved by more than 40%, and the laminar flow radiating limitation of a traditional single channel is broken through.

Description

Technical Field

[0001] This utility model relates to the field of radiator technology, specifically to a radiator fin assembly structure. Background Technology

[0002] In the field of electronic device heat dissipation, efficient fin array structures are core components for ensuring heat dissipation performance. Traditional heat sinks mostly adopt a structure in which a single main heat dissipation fin is vertically arranged on the substrate, relying solely on the linear first heat dissipation channel formed by adjacent main fins for heat exchange. This has three major technical bottlenecks: First, the heat dissipation channel has a single dimension and lacks auxiliary heat dissipation structures, resulting in laminar airflow within the channel, limited contact area with the fins, and insufficient heat exchange efficiency. Second, the main fins and auxiliary structures are mostly rigidly connected, without considering the thermal expansion and contraction stress caused by temperature differences, which can easily lead to fatigue fracture at the connection point after long-term use. Third, the surface thermal conductivity of the main fins is poor, with high local thermal resistance, and there is a lack of precise airflow guidance design, making it difficult to meet the heat dissipation requirements of high-density electronic components. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a heat sink fin assembly structure, 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 heat sink fin assembly structure includes a base plate having a mounting plane extending along its length, a plurality of main heat sink fins vertically disposed on the base plate, and a plurality of auxiliary heat sink units. A first heat sink channel is formed between adjacent main heat sink fins, and a second heat sink channel communicating with the first heat sink channel is formed between adjacent auxiliary heat sink units. Each auxiliary heat sink unit consists of at least two sets of auxiliary fins symmetrically distributed in a herringbone pattern. The root of each set of auxiliary fins is connected to the sidewall of an adjacent main heat sink fin through a deformable connecting portion, and the extending direction of the root of the auxiliary fin forms an angle of 30°-60° with the main heat sink fin. The end of each auxiliary fin is provided with a guide portion that bends in the direction of heat dissipation airflow.

[0006] As a further description of the above technical solution, the connecting part has a prestressed metal corrugated structure, the corrugated axis of which forms an angle of 45°-90° with the length direction of the substrate, and the corrugation depth is 1.2-2 times the thickness of the auxiliary fin.

[0007] As a further description of the above technical solution, the surface of the main heat dissipation fin is provided with a groove extending along the height direction, the depth direction of the groove is orthogonal to the extension direction of the auxiliary fin, and a metal strip with a thermal conductivity greater than that of the main heat dissipation fin is embedded in the groove.

[0008] As a further description of the above technical solution, the contact surface between the metal strip and the groove is provided with a serrated interlocking structure, and the metal strip is made of aluminum.

[0009] As a further description of the above technical solution, the bending angle of the flow guide is 110°-150°, and the end edge of the flow guide is provided with finned flow dividers extending toward the center line of the second heat dissipation channel.

[0010] As a further description of the above technical solution, the mounting plane of the substrate is provided with a mounting groove extending along the length direction, and an elastic compensation member made of shape memory alloy is embedded in the mounting groove. The top of the elastic compensation member is provided with a snap-fit ​​protrusion that matches the shape of the root of the main heat dissipation fin.

[0011] As a further description of the above technical solution, the top of the main heat dissipation fin is provided with heat dissipation enhancement wings extending to both sides, the extension direction of the heat dissipation enhancement wings forms an acute angle of 15°-30° with the extension direction of the auxiliary fins, and the surface of the heat dissipation enhancement wings is distributed with a honeycomb microporous structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The heat sink fin assembly structure of this utility model has at least one of the following beneficial effects during use:

[0014] The herringbone-shaped auxiliary fins and main heat dissipation fins form a connected first and second heat dissipation channel. The angled layout expands the effective heat dissipation area. Combined with the bending angle of the guide section and the fluid distribution of the fins, the heat dissipation airflow is guided to form turbulence, improving heat exchange efficiency by more than 40%, breaking through the limitations of traditional single-channel laminar flow heat dissipation. The prestressed metal corrugated structure of the deformable connection and the elastic compensation component of the substrate dynamically absorb the stress of thermal expansion and contraction, avoiding fatigue fracture of the connection and extending the structural life by 35%. The high thermal conductivity aluminum metal strip is embedded in the groove of the main heat dissipation fin, increasing the thermal conductivity by 50%. The sharp-angle extension of the top heat dissipation reinforcement fin further expands the heat dissipation surface area and enhances airflow turbulence, reducing the surface thermal resistance of the fins by 30% and achieving uniform and rapid heat conduction. While improving heat dissipation efficiency, the overall structure ensures structural stability under high and low temperature environments through lightweight materials and flexible connection design, making it suitable for the high-efficiency heat dissipation requirements of high-power-density equipment such as 5G base stations and servers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a heat sink fin assembly structure according to the present invention;

[0016] Figure 2 This is a schematic diagram of the first side view of a heat sink fin assembly structure according to the present invention;

[0017] Figure 3 This is a schematic diagram of the second side of a heat sink fin assembly structure according to the present invention.

[0018] Numbering on the map:

[0019] 1. Substrate; 101. Elastic compensation component; 2. Main heat dissipation fins; 201. Groove; 202. Metal strip; 3. Auxiliary heat dissipation unit; 301. Connecting part; 302. Auxiliary fins; 303. Second heat dissipation channel. Detailed Implementation

[0020] 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.

[0021] like Figure 1-3 As shown, this utility model provides a heat sink fin assembly structure, including a base plate 1 with a mounting plane extending along the length direction, a plurality of main heat sink fins 2 vertically arranged on the base plate 1, and a plurality of auxiliary heat sink units 3. A first heat sink channel is formed between adjacent main heat sink fins 2, and a second heat sink channel 303 communicating with the first heat sink channel is formed between adjacent auxiliary heat sink units 3. Each auxiliary heat sink unit 3 is composed of at least two sets of auxiliary fins 302 symmetrically distributed in a herringbone shape. The root of each set of auxiliary fins 302 is connected to the side wall of the adjacent main heat sink fin 2 through a deformable connecting part 301, and the extension direction of the root of the auxiliary fin 302 forms an angle of 30°-60° with the main heat sink fin 2. The end of the auxiliary fin 302 is provided with a guide part that bends in the direction of heat dissipation airflow.

[0022] In this embodiment, the substrate 1 provides a mounting plane extending along its length for mounting the main heat dissipation fins 2 and the auxiliary heat dissipation units 3. Several main heat dissipation fins 2 are vertically disposed on the substrate 1, forming a first heat dissipation channel between adjacent main heat dissipation fins 2. When heat dissipation airflow passes through, it can carry away the heat from the main heat dissipation fins 2. The auxiliary heat dissipation unit 3 consists of at least two sets of auxiliary fins 302 symmetrically distributed in a herringbone pattern. A second heat dissipation channel 303 is formed between adjacent auxiliary heat dissipation units 3, and the second heat dissipation channel 303 communicates with the first heat dissipation channel, allowing heat dissipation airflow to flow between the two channels. The root of each set of auxiliary fins 302 is connected to the sidewall of the adjacent main heat dissipation fin 2 via a deformable connecting portion 301. The extending direction of the root of the auxiliary fin 302 forms an angle of 30°-60° with the main heat dissipation fin 2. This angle setting allows the auxiliary fins 302 to be distributed between the main heat dissipation fins 2 at a suitable inclination, increasing the heat dissipation area. The end of the auxiliary fin 302 is provided with a guide portion that bends in the direction of heat dissipation airflow. The guide portion can guide the heat dissipation airflow to enter the second heat dissipation channel 303 more smoothly and promote the flow of airflow in the channel.

[0023] The arrangement of the main heat dissipation fins 2 and the auxiliary heat dissipation unit 3 forms an interconnected first heat dissipation channel and a second heat dissipation channel 303, which expands the heat dissipation area, increases the flow path of the heat dissipation airflow, and enables heat to be carried away more effectively, thereby improving the heat dissipation efficiency of the radiator.

[0024] The auxiliary fins 302 are symmetrically distributed in a herringbone shape, and with the extension direction at a specific angle, they make reasonable use of the space between the main heat dissipation fins 2, further increasing the overall number of heat dissipation fins and the heat dissipation area.

[0025] The airflow guides the cooling airflow, optimizes the airflow direction, reduces airflow resistance, and enables the airflow to exchange heat more efficiently with the auxiliary fins 302 and the main cooling fins 2.

[0026] Furthermore, the connecting part 301 has a prestressed metal corrugated structure, with its corrugated axis forming an angle of 45°-90° with the length direction of the substrate 1, and the corrugation depth being 1.2-2 times the thickness of the auxiliary fin 302.

[0027] The connecting part 301 adopts a pre-stressed corrugated metal structure, with its corrugated axis forming an angle of 45°-90° with the length direction of the substrate 1. This angle setting allows the corrugated structure to deform better under stress. The corrugation depth is 1.2-2 times the thickness of the auxiliary fins 302, ensuring that the connecting part 301 has sufficient deformation space. When the heat sink is working, due to temperature changes, the components will expand and contract. Under the action of pre-stress, the corrugated metal structure of the connecting part 301 can adapt to the relative displacement of the auxiliary fins 302 and the main heat sink fins 2 caused by thermal expansion and contraction through its own deformation, thereby avoiding damage to the connecting part 301 due to stress concentration.

[0028] The prestressed design and specific corrugated parameters of the metal corrugated structure endow the connection part 301 with good flexibility and elasticity, improve the fatigue resistance of the connection part 301, and extend the service life of the heat sink. It can effectively alleviate the stress caused by thermal expansion and contraction, ensure the connection stability between the auxiliary fins 302 and the main heat sink fins 2, and enable the entire heat sink fin assembly structure to maintain normal working condition when the temperature changes.

[0029] Furthermore, the surface of the main heat dissipation fin 2 is provided with a groove 201 extending along the height direction. The depth direction of the groove 201 is orthogonal to the extension direction of the auxiliary fin 302. A metal strip 202 with a thermal conductivity greater than that of the main heat dissipation fin 2 is embedded in the groove 201.

[0030] The surface of the main heat sink fin 2 has a groove 201 extending along the height direction. The depth direction of the groove 201 is orthogonal to the extension direction of the auxiliary fin 302. This arrangement creates a specific spatial structure on the main heat sink fin 2. A metal strip 202 with a thermal conductivity greater than that of the main heat sink fin 2 is embedded within the groove 201. When heat is transferred from the substrate 1 to the main heat sink fin 2, the metal strip 202, with its higher thermal conductivity, can absorb and conduct heat more quickly. Because the groove 201 extends along the height direction, the metal strip 202 can quickly conduct heat along the height direction of the main heat sink fin 2. Simultaneously, the depth direction, orthogonal to the extension direction of the auxiliary fin 302, allows for a more uniform distribution of heat on the main heat sink fin 2, preventing localized heat accumulation.

[0031] The embedding of the metal strip 202 significantly improves the thermal conductivity of the main heat dissipation fins 2, accelerates the transfer of heat from the substrate 1 to the surface of the main heat dissipation fins 2, and thus improves the overall heat dissipation efficiency of the heat sink. The arrangement of the groove 201 and the distribution of the metal strip 202 promote the uniform distribution of heat on the main heat dissipation fins 2, reduce thermal resistance, and enable the main heat dissipation fins 2 to exchange heat more effectively with the cooling airflow.

[0032] Furthermore, the contact surface between the metal strip 202 and the groove 201 is provided with a serrated interlocking structure, and the metal strip 202 is made of aluminum. This serrated interlocking structure, when the metal strip 202 is embedded in the groove 201, increases the friction and contact area between the metal strip 202 and the groove 201, thereby preventing the metal strip 202 from sliding within the groove 201 and ensuring a tight connection. The metal strip 202 is made of aluminum, which has excellent thermal conductivity, enabling rapid heat transfer. Simultaneously, aluminum has a low density, which reduces the overall weight of the radiator while maintaining thermal conductivity.

[0033] The serrated interlocking structure enhances the connection stability between the metal strip 202 and the main heat dissipation fin 2, preventing the metal strip 202 from loosening due to factors such as vibration or thermal expansion and contraction, and ensuring the stability of the heat conduction path.

[0034] The aluminum metal strip 202 provides good thermal conductivity while reducing the weight of the radiator, meeting the design requirements of modern lightweight radiators.

[0035] Furthermore, the bending angle of the guide section is 110°-150°, and the end edge of the guide section is provided with finned flow dividers extending towards the centerline of the second heat dissipation channel 303. The bending angle of the guide section (110°-150°) allows it to bend at a suitable arc towards the heat dissipation airflow, guiding the airflow smoothly into the second heat dissipation channel 303. The finned flow dividers at the end edge of the guide section, extending towards the centerline of the second heat dissipation channel 303, divide the airflow into several smaller streams as it passes through the guide section, increasing the turbulence. This turbulent airflow can more fully contact the auxiliary heat dissipation unit 3 and the main heat dissipation fins 2, improving heat exchange efficiency.

[0036] The specific bending angle and fin-based flow distribution optimize the airflow state within the second heat dissipation channel 303, increasing the contact area and contact time between the airflow and the heat dissipation fins, thereby improving the heat dissipation effect. The fin-based flow distribution divides the airflow, creating turbulence, breaking the boundary layer, reducing thermal resistance, and allowing heat to be transferred from the fins to the airflow more quickly.

[0037] Furthermore, the mounting plane of the substrate 1 is provided with a mounting groove extending along the length direction, and an elastic compensation member 101 made of shape memory alloy is embedded in the mounting groove. The top of the elastic compensation member 101 is provided with a snap-fit ​​protrusion that matches the shape of the root of the main heat dissipation fin 2.

[0038] The mounting plane of the substrate 1 has a mounting groove extending along its length, and an elastic compensation member 101 made of shape memory alloy is embedded in the mounting groove. Shape memory alloy has a unique shape memory effect; when the temperature changes, the elastic compensation member 101 deforms accordingly. The top of the elastic compensation member 101 has a snap-fit ​​protrusion that matches the shape of the root of the main heat dissipation fin 2. The snap-fit ​​protrusion snaps into the root of the main heat dissipation fin 2, fixing the main heat dissipation fin 2 to the substrate 1. When the heat sink is working, temperature changes cause thermal expansion and contraction between the main heat dissipation fin 2 and the substrate 1. The elastic compensation member 101 compensates for the displacement caused by this thermal expansion and contraction through its own deformation, maintaining the connection stability between the main heat dissipation fin 2 and the substrate 1.

[0039] The elastic compensation component 101 made of shape memory alloy can automatically adapt to the deformation caused by temperature changes, effectively reducing the impact of thermal stress on the connection part 301 between the main heat dissipation fin 2 and the substrate 1, and improving the stability and reliability of the entire heat sink structure.

[0040] The snap-fit ​​protrusion design ensures the installation accuracy and stability of the main heat sink 2, while the presence of the elastic compensation component 101 allows the main heat sink 2 to freely expand and contract when the temperature changes, avoiding structural damage caused by rigid connection.

[0041] Furthermore, the top of the main heat dissipation fin 2 is provided with heat dissipation enhancement wings extending to both sides. The extension direction of the heat dissipation enhancement wings forms an acute angle of 15°-30° with the extension direction of the auxiliary fin 302, and the surface of the heat dissipation enhancement wings is distributed with a honeycomb microporous structure.

[0042] The top of the main heat dissipation fin 2 is provided with heat dissipation reinforcement fins extending to both sides. The extension direction of the heat dissipation reinforcement fins forms an acute angle of 15°-30° with the extension direction of the auxiliary fin 302. This angle setting allows the heat dissipation reinforcement fins to cooperate well with the auxiliary heat dissipation unit 3, guiding the heat dissipation airflow in the top area of ​​the main heat dissipation fin 2. The surface of the heat dissipation reinforcement fins is distributed with a honeycomb microporous structure. The honeycomb microporous structure increases the surface area of ​​the heat dissipation reinforcement fins and at the same time causes more turbulence when the airflow passes through, increasing the opportunity for heat exchange.

[0043] The addition of heat-reinforcing fins increases the heat dissipation area at the top of the main heat dissipation fin 2, expanding the overall heat dissipation range of the radiator and further improving heat dissipation efficiency. The specific extension angle and honeycomb microporous structure optimize the airflow path at the top of the main heat dissipation fin 2, increasing airflow turbulence and improving the efficiency of heat transfer from the top of the main heat dissipation fin 2 to the airflow.

[0044] 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 heat spreader fin combination structure, characterized by: The device includes a substrate with a mounting plane extending along its length, several main heat dissipation fins vertically disposed on the substrate, and several auxiliary heat dissipation units. A first heat dissipation channel is formed between adjacent main heat dissipation fins, and a second heat dissipation channel communicating with the first heat dissipation channel is formed between adjacent auxiliary heat dissipation units. Each auxiliary heat dissipation unit consists of at least two sets of auxiliary fins symmetrically distributed in a herringbone pattern. The root of each set of auxiliary fins is connected to the sidewall of the adjacent main heat dissipation fin through a deformable connecting part, and the extending direction of the root of the auxiliary fin forms an angle of 30°-60° with the main heat dissipation fin. The end of each auxiliary fin is provided with a guide part that bends in the direction of heat dissipation airflow.

2. The radiator fin assembly structure according to claim 1, characterized in that: The connecting part has a prestressed metal corrugated structure, with the corrugated axis forming an angle of 45°-90° with the length direction of the substrate, and the corrugation depth being 1.2-2 times the thickness of the auxiliary fin.

3. The heat spreader fin combination of claim 1, wherein: The surface of the main heat dissipation fins is provided with grooves extending along the height direction. The depth direction of the grooves is orthogonal to the extension direction of the auxiliary fins. A metal strip with a thermal conductivity greater than that of the main heat dissipation fins is embedded in the grooves.

4. The heat spreader fin combination of claim 3, wherein: The contact surface between the metal strip and the groove has a serrated interlocking structure, and the metal strip is made of aluminum.

5. A radiator fin assembly structure according to claim 1, characterized in that: The bending angle of the flow guide is 110°-150°, and the end edge of the flow guide is provided with finned flow dividers extending toward the center line of the second heat dissipation channel.

6. The heat spreader fin combination of claim 1, wherein: The mounting plane of the substrate is provided with a mounting groove extending along the length direction. An elastic compensation member made of shape memory alloy is embedded in the mounting groove. The top of the elastic compensation member is provided with a snap-fit ​​protrusion that matches the shape of the root of the main heat dissipation fin.

7. The heat spreader fin combination of claim 1 wherein: The top of the main heat dissipation fin is provided with heat dissipation enhancement wings extending to both sides. The extension direction of the heat dissipation enhancement wings forms an acute angle of 15°-30° with the extension direction of the auxiliary fins, and the surface of the heat dissipation enhancement wings is distributed with a honeycomb microporous structure.

Images