Double-sided staggered air-cooled heat sink

Abstract

This invention provides a double-sided staggered air-cooled heat sink, comprising a first heat dissipation structure, a second heat dissipation structure, and a substrate. The first and second heat dissipation structures are staggered and positioned opposite each other, with the substrate as the intermediary. The first heat dissipation structure is placed in the environment requiring heat dissipation, while the second heat dissipation structure is in contact with the external environment. The first heat dissipation structure includes multiple parallel first heat dissipation fins, and the second heat dissipation structure includes multiple parallel second heat dissipation fins. There is a non-zero deflection angle between the direction vectors of the first and second heat dissipation fins. This technical solution, through the staggered design of the double-sided heat dissipation structure, the design of the double-sided non-parallel heat dissipation fins, and the differentiated parameter design of the double-sided heat dissipation fin array, ensures that heat is fully conducted in different directions. Furthermore, it can specifically strengthen the fins on the heat absorption and heat dissipation surfaces, avoiding localized heat concentration, thereby improving heat absorption and heat transfer capabilities and ultimately enhancing heat dissipation performance.

Description

Technical Field

[0001] This utility model relates to the field of air-cooled heat dissipation technology, specifically to a double-sided staggered air-cooled heat sink. Background Technology

[0002] In fields such as information technology, communications, and industrial control, the internal spaces of equipment like servers and control cabinets often contain numerous heat-generating components or experience localized heat buildup due to poor air circulation. If this heat cannot be dissipated effectively and promptly, the internal temperature of the equipment will continue to rise, affecting the reliability, stability, and lifespan of electronic components. Therefore, effective heat dissipation of the overall internal environment of the equipment is one of the key requirements for ensuring its long-term stable operation.

[0003] Air cooling technology is widely used in such environmental heat dissipation scenarios due to its relatively simple structure, controllable cost, and convenient maintenance. Currently, air-cooled radiators used in these environments typically employ a metal substrate combined with an array of heat dissipation fins as their core heat dissipation structure. The main function of the heat dissipation fins is to significantly expand the contact surface area with hot air, enhancing convective heat transfer efficiency. Based on the arrangement of the heat dissipation fins, existing technologies are mainly divided into two types:

[0004] (1) Single-sided heat dissipation fin design: This is currently the most widely used design. The heat dissipation fins are arranged only on one main plane of the metal substrate. This design is simple in structure and easy to manufacture and install. However, its heat dissipation capacity is limited by the heat dissipation area on one side. In environmental heat dissipation scenarios, since there is no specific high heat flux density heat source that can be closely attached to the substrate for efficient heat conduction, the heat sink mainly relies on the surface of the fins exposed to the hot air to absorb heat. The single-sided design means that only the fins on one side can effectively participate in heat exchange, and its heat absorption capacity is limited, making it difficult to meet the growing environmental heat dissipation needs of high power density equipment or enclosed spaces.

[0005] (2) Double-sided parallel heat dissipation fin design: Compared to single-sided design, some heat sinks adopt a scheme in which parallel heat dissipation fins with the same distribution pattern are arranged on two opposite planes of the metal substrate, i.e., double-sided parallel heat dissipation fin design. This design can improve the ability to absorb heat from hot air by increasing the heat dissipation surface area, and can bring a certain performance improvement compared to single-sided design. However, its performance improvement is still insufficient. The main reason is:

[0006] 1) Parallel layout limits airflow efficiency: The side fins are usually arranged in a parallel and symmetrical layout. When airflow passes through the radiator, this structure may lead to uneven airflow distribution, with some areas having too low a flow velocity or forming dead zones, which reduces the overall convective heat transfer efficiency.

[0007] 2) Inability to specifically enhance the heat absorption surface: In environmental heat dissipation scenarios, hot air may mainly flow into the radiator from a specific direction or area. However, the double-sided parallel design treats all fins "equally," failing to optimize the fins of the main heat absorption surface according to the actual flow characteristics of hot air, resulting in the heat absorption potential not being fully utilized.

[0008] Therefore, although the double-sided parallel heat sink design represents an improvement in environmental heat dissipation compared to the single-sided design, the increase in its heat dissipation performance remains limited. When facing high-power-density equipment, extremely space-constrained server racks, or special application scenarios with extremely stringent temperature control requirements, the existing double-sided parallel heat sink design still falls short in heat dissipation capacity and cannot effectively meet the need for rapid and efficient reduction of ambient temperature in these scenarios. Utility Model Content

[0009] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a double-sided staggered air-cooled heat sink. By adopting a double-sided heat dissipation structure staggered design, a double-sided non-parallel heat dissipation fin design, and a differentiated parameter design for the double-sided heat dissipation fin array, heat can be fully conducted in different directions. Furthermore, the fins on the heat absorption surface and the heat dissipation surface can be specifically strengthened to avoid local heat concentration, thereby improving heat absorption and heat transfer capabilities and achieving the effect of improving heat dissipation performance.

[0010] This utility model provides a double-sided staggered air-cooled heat sink, including a first heat dissipation structure, a second heat dissipation structure and a substrate. The first heat dissipation structure and the second heat dissipation structure are staggered and placed in opposite directions with the substrate as the medium. The first heat dissipation structure is disposed in the environment that needs to be dissipated, and the second heat dissipation structure is in contact with the external environment.

[0011] The first heat dissipation structure includes a plurality of parallel first heat dissipation fins, and the second heat dissipation structure includes a plurality of parallel second heat dissipation fins. The first heat dissipation fins and the second heat dissipation fins are respectively arranged perpendicularly to the substrate, and there is a non-zero deflection angle between the direction vector parallel to the first heat dissipation fins and the substrate and the direction vector parallel to the second heat dissipation fins and the substrate.

[0012] Furthermore, in the first view projection plane, the center line of the first heat dissipation structure is collinear with the center line of the substrate, while the center line of the second heat dissipation structure is not collinear with the center line of the substrate.

[0013] In the second view projection plane, the center line of the first heat dissipation structure is not collinear with the center line of the substrate, while the center line of the second heat dissipation structure is collinear with the center line of the substrate.

[0014] The first view projection plane is perpendicular to the second view projection plane.

[0015] Furthermore, the thickness of the first heat dissipation fin is greater than the thickness of the second heat dissipation fin, and the spacing between adjacent first heat dissipation fins is greater than the spacing between adjacent second heat dissipation fins.

[0016] Furthermore, within the first view projection plane, the width of the first heat dissipation structure is greater than or equal to the width of the second heat dissipation structure, the height of the first heat dissipation structure is greater than or equal to the height of the second heat dissipation structure, the widths of both the first and second heat dissipation structures are less than the width of the substrate, and the heights of both the first and second heat dissipation structures are greater than the height of the substrate.

[0017] In the projection plane of the second view, the length of the first heat dissipation structure is greater than or equal to the length of the second heat dissipation structure, and the lengths of both the first heat dissipation structure and the second heat dissipation structure are less than the length of the substrate.

[0018] Furthermore, the direction vector parallel to the first heat dissipation fin and the substrate is set perpendicular to the direction vector parallel to the second heat dissipation fin and the substrate.

[0019] Furthermore, the plurality of first heat dissipation fins and the plurality of second heat dissipation fins are arranged in a single-row array structure, and the shapes of the first heat dissipation fins and the second heat dissipation fins are different.

[0020] Furthermore, the first heat dissipation fin is irregularly shaped, while the second heat dissipation fin is rectangular.

[0021] Furthermore, the first heat dissipation fin has a concave structure, and its concave portion matches the heat dissipation object in the heat dissipation environment.

[0022] Furthermore, the first heat dissipation fin includes a first heat dissipation portion, a second heat dissipation portion, and a third heat dissipation portion, which are integrally formed. The areas of the first heat dissipation portion and the second heat dissipation portion may be the same or different.

[0023] Furthermore, the thickness of the first heat dissipation fin is twice that of the second heat dissipation fin.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The double-sided heat dissipation structure is designed in an interlaced manner, and the double-sided heat dissipation fins are designed in a non-parallel manner. This can break the single heat flow direction of the traditional double-sided parallel heat dissipation fin design, thereby avoiding the formation of local hot spots, so that heat can be fully conducted in different directions, improving the overall convective heat transfer efficiency, and thus improving the heat transfer capacity. Preferably, the double-sided heat dissipation fins are designed perpendicular to each other, so that heat can be fully conducted in both the longitudinal and transverse directions, thereby improving the heat transfer capacity.

[0026] (2) The double-sided heat dissipation fin array is designed with specific parameters, that is, the first heat dissipation structure located in the heat dissipation environment and the second heat dissipation structure in contact with the external environment are designed with different parameters. Specifically, the length, width and height of the structure, the thickness of the heat dissipation fins and the spacing between adjacent heat dissipation fins are designed to strengthen the fins of both the heat absorption surface and the heat dissipation surface, thereby improving the heat absorption and heat dissipation capabilities.

[0027] (3) The first heat dissipation fins located in the heat dissipation environment are designed with an irregular shape so that the first heat dissipation structure composed of multiple first heat dissipation fins can be better adapted to the heat dissipation object in the heat dissipation environment and maximize the heat absorption area; preferably, the first heat dissipation fins are U-shaped structures, and their concave parts match the heat dissipation object so that the heat dissipation object has heat absorption fins on three sides, thereby improving the heat absorption effect. (4) Experiments have shown that the performance of the double-sided staggered air-cooled radiator provided by this utility model is improved by about 40% compared with the single-sided air-cooled radiator and by about 15% compared with the double-sided parallel fin air-cooled radiator. Attached Figure Description

[0028] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 A schematic diagram of a double-sided staggered air-cooled heat sink provided for an embodiment of this utility model;

[0030] Figure 2 A top view of a double-sided staggered air-cooled heat sink provided for an embodiment of this utility model;

[0031] Figure 3 A bottom view of a double-sided staggered air-cooled heat sink provided for an embodiment of this utility model;

[0032] Figure 4 A first view of a double-sided staggered air-cooled radiator provided for an embodiment of this utility model;

[0033] Figure 5 A second view of a double-sided staggered air-cooled heat sink provided for an embodiment of this utility model.

[0034] In the picture:

[0035] 1. First heat dissipation structure; 101. First heat dissipation fin; 1011. First heat dissipation section; 1012. Second heat dissipation section; 1013. Third heat dissipation section; 2. Second heat dissipation structure; 201. Second heat dissipation fin; 3. Substrate. Detailed Implementation

[0036] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0037] Example:

[0038] Please see Figures 1-5 The present invention provides a double-sided staggered air-cooled heat sink, including a first heat dissipation structure 1, a second heat dissipation structure 2 and a substrate 3. The first heat dissipation structure 1 and the second heat dissipation structure 2 are staggered and placed in opposite directions with the substrate 3 as the intermediary. The first heat dissipation structure 1 is placed in the environment that needs heat dissipation, and the second heat dissipation structure 2 is in contact with the external environment.

[0039] The first heat dissipation structure 1 includes a plurality of parallel first heat dissipation fins 101, and the second heat dissipation structure 2 includes a plurality of parallel second heat dissipation fins 201. The first heat dissipation fins 101 and the second heat dissipation fins 201 are respectively arranged perpendicularly to the substrate 3. There is a non-zero deflection angle between the direction vector parallel to the first heat dissipation fins 101 and the substrate 3 and the direction vector parallel to the second heat dissipation fins 201 and the substrate 3.

[0040] The heat dissipation environment refers to the environment within a preset range around the object that needs heat dissipation, while the external environment refers to the environment other than the heat dissipation environment.

[0041] In one specific embodiment, within the projection plane of the first view, the centerline of the first heat dissipation structure 1 is collinear with the centerline of the substrate 3, and the centerline of the second heat dissipation structure 2 is not collinear with the centerline of the substrate 3; the width of the first heat dissipation structure 1 is greater than or equal to the width of the second heat dissipation structure 2, the height of the first heat dissipation structure 1 is greater than or equal to the height of the second heat dissipation structure 2, the width of both the first heat dissipation structure 1 and the second heat dissipation structure 2 is less than the width of the substrate 3, and the height of both the first heat dissipation structure 1 and the second heat dissipation structure 2 is greater than the height of the substrate 3.

[0042] In the projection plane of the second view, the center line of the first heat dissipation structure 1 is not collinear with the center line of the substrate 3, and the center line of the second heat dissipation structure 2 is collinear with the center line of the substrate 3; the length of the first heat dissipation structure 1 is greater than or equal to the length of the second heat dissipation structure 2, and the lengths of both the first heat dissipation structure 1 and the second heat dissipation structure 2 are less than the length of the substrate 3.

[0043] The thickness of the first heat dissipation fin 101 is greater than the thickness of the second heat dissipation fin 201, and the spacing between adjacent first heat dissipation fins 101 is greater than the spacing between adjacent second heat dissipation fins 201.

[0044] The projection plane of the first view is set perpendicular to the projection plane of the second view.

[0045] Preferably, the direction vector parallel to the first heat dissipation fin 101 and the substrate 3 is perpendicular to the direction vector parallel to the second heat dissipation fin 201 and the substrate 3; the plurality of first heat dissipation fins 101 and the plurality of second heat dissipation fins 201 are all arranged in a single-row array structure, and the shapes of the first heat dissipation fins 101 and the second heat dissipation fins 201 are different; optionally, the first heat dissipation fins 101 are irregularly shaped, and the second heat dissipation fins 201 are rectangular; specifically, the first heat dissipation fin 101 has a U-shaped structure, and its concave part matches the object to be dissipated in the heat dissipation environment. The first heat dissipation fin 101 includes a first heat dissipation portion 1011, a second heat dissipation portion 1012 and a third heat dissipation portion 1013, which are integrally formed, and the areas of the first heat dissipation portion 1011 and the second heat dissipation portion 1012 are the same or different.

[0046] In a practical application scenario, the offset between the centerline of the first heat dissipation structure 1 and the centerline of the substrate 3 is approximately 4% of the length of the substrate 3; the offset between the centerline of the second heat dissipation structure 2 and the centerline of the substrate 3 is approximately 2% of the width of the substrate 3; the thickness of the first heat dissipation fin 101 is twice that of the second heat dissipation fin 201; the spacing between the two first heat dissipation fins 101 is more than 25% larger than the spacing between the two second heat dissipation fins 201; and the height of the first heat dissipation fin 101 is more than 25% higher than the height of the second heat dissipation fin 201. The width of the first heat dissipation structure 1 is approximately equal to or slightly greater than (within 10%) the width of the second heat dissipation structure 2. The length of the first heat dissipation structure 1 is approximately equal to or slightly less than (within 10%) the length of the second heat dissipation structure 2. The height of the first heat dissipation section 1011 is equal to the height of the second heat dissipation section 1012. The length of the first heat dissipation section 1011 is greater than the length of the second heat dissipation section 1012. The length of the second heat dissipation section 1012 is approximately equal to the length of the third heat dissipation section 1013. The height of the third heat dissipation section 1013 is approximately equal to the thickness of the substrate 3.

[0047] In this embodiment, the third heat dissipation section 1013 is matched with the object to be dissipated. The first heat dissipation section 1011, the second heat dissipation section 1012 and the third heat dissipation section 1013 located on three sides around the object to be dissipated absorb the heat in the environment to be dissipated and transfer the heat to the substrate 3. Then, the heat is further transferred to the external environment through the second heat dissipation structure 2 that is in contact with the external environment, thus completing the heat dissipation.

[0048] Because the first heat dissipation structure 1 and the second heat dissipation structure 2 located opposite to each other on the substrate 3 are designed in an alternating manner, and the first heat dissipation fin 101 and the second heat dissipation fin 201 are designed in a non-parallel manner, the single heat flow direction of the traditional double-sided parallel heat dissipation fin design can be broken, thereby avoiding the formation of local hot spots, so that heat can be fully conducted in different directions, improving the overall convective heat transfer efficiency, and thus improving the heat transfer capacity; preferably, because the first heat dissipation fin 101 and the second heat dissipation fin 201 are designed perpendicular to each other, heat can be fully conducted in both the longitudinal and transverse directions, thereby improving the heat transfer capacity.

[0049] Furthermore, targeted parameter design was carried out on the array of multiple first heat dissipation fins 101 and the array of multiple second heat dissipation fins 201. Specifically, the first heat dissipation structure 1 located in the heat dissipation environment and the second heat dissipation structure 2 in contact with the external environment were designed with differentiated parameters, including the length, width, height, thickness of the heat dissipation fins, and spacing between adjacent heat dissipation fins. This ensures that the fins on both the heat absorption surface and the heat dissipation surface are specifically strengthened, thereby improving the heat absorption and heat dissipation capabilities.

[0050] Furthermore, since the first heat dissipation fin 101 located in the heat dissipation environment is designed with an irregular shape, the first heat dissipation structure 1 composed of multiple first heat dissipation fins 101 can be more adapted to the heat dissipation object in the heat dissipation environment, maximizing the heat absorption area; preferably, the first heat dissipation fin 101 has a concave structure, and its concave part matches the heat dissipation object, so that the heat dissipation object has heat absorption fins on three sides, thereby improving the heat absorption effect.

[0051] Experiments have shown that the double-sided staggered air-cooled radiator provided by this invention offers approximately 40% better performance than a single-sided air-cooled radiator and approximately 15% better performance than a double-sided parallel fin air-cooled radiator. Specific embodiments of this invention have been described above. It should be understood that this invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this invention. Unless otherwise specified, the embodiments and features of this invention can be arbitrarily combined with each other.

Claims

1. A double-sided staggered air-cooled heat sink, characterized by, It includes a first heat dissipation structure (1), a second heat dissipation structure (2) and a substrate (3). The first heat dissipation structure (1) and the second heat dissipation structure (2) are staggered and placed in opposite directions with the substrate (3) as the intermediary. The first heat dissipation structure (1) is placed in the environment that needs heat dissipation, and the second heat dissipation structure (2) is in contact with the external environment. The first heat dissipation structure (1) includes a plurality of parallel first heat dissipation fins (101), and the second heat dissipation structure (2) includes a plurality of parallel second heat dissipation fins (201). The first heat dissipation fins (101) and the second heat dissipation fins (201) are respectively perpendicular to the substrate (3). There is a non-zero deflection angle between the direction vector parallel to the first heat dissipation fins (101) and the substrate (3) and the direction vector parallel to the second heat dissipation fins (201) and the substrate (3).

2. The double-sided staggered air-cooled radiator according to claim 1, characterized in that, In the first view projection plane, the center line of the first heat dissipation structure (1) is collinear with the center line of the substrate (3), and the center line of the second heat dissipation structure (2) is not collinear with the center line of the substrate (3). In the second view projection plane, the center line of the first heat dissipation structure (1) is not collinear with the center line of the substrate (3), and the center line of the second heat dissipation structure (2) is collinear with the center line of the substrate (3). The first view projection plane is perpendicular to the second view projection plane.

3. A double-sided staggered air-cooled radiator according to claim 2, characterized in that, The thickness of the first heat dissipation fin (101) is greater than the thickness of the second heat dissipation fin (201), and the spacing between adjacent first heat dissipation fins (101) is greater than the spacing between adjacent second heat dissipation fins (201).

4. A double-sided staggered air-cooled radiator according to claim 3, characterized in that, Within the first view projection plane, the width of the first heat dissipation structure (1) is greater than or equal to the width of the second heat dissipation structure (2), the height of the first heat dissipation structure (1) is greater than or equal to the height of the second heat dissipation structure (2), the width of both the first heat dissipation structure (1) and the second heat dissipation structure (2) is less than the width of the substrate (3), and the height of both the first heat dissipation structure (1) and the second heat dissipation structure (2) is greater than the height of the substrate (3). In the projection plane of the second view, the length of the first heat dissipation structure (1) is greater than or equal to the length of the second heat dissipation structure (2), and the lengths of both the first heat dissipation structure (1) and the second heat dissipation structure (2) are less than the length of the substrate (3).

5. A double-sided staggered air-cooled radiator according to any one of claims 1 to 4, characterized in that, The direction vector parallel to the first heat dissipation fin (101) and the substrate (3) is set perpendicular to the direction vector parallel to the second heat dissipation fin (201) and the substrate (3).

6. A double-sided staggered air-cooled radiator according to claim 5, characterized in that, The plurality of first heat dissipation fins (101) and the plurality of second heat dissipation fins (201) are arranged in a single-row array structure, and the first heat dissipation fins (101) and the second heat dissipation fins (201) have different shapes.

7. A double-sided staggered air-cooled radiator according to claim 6, characterized in that, The first heat dissipation fin (101) is irregularly shaped, and the second heat dissipation fin (201) is rectangular.

8. A double-sided staggered air-cooled radiator according to claim 7, characterized in that, The first heat dissipation fin (101) has a concave structure, and its concave part matches the heat dissipation object in the heat dissipation environment.

9. A double-sided staggered air-cooled radiator according to claim 8, characterized in that, The first heat dissipation fin (101) includes a first heat dissipation portion (1011), a second heat dissipation portion (1012), and a third heat dissipation portion (1013). The first heat dissipation portion (1011), the second heat dissipation portion (1012), and the third heat dissipation portion (1013) are integrally formed. The area of ​​the first heat dissipation portion (1011) and the second heat dissipation portion (1012) may be the same or different.

10. A double-sided staggered air-cooled radiator according to claim 9, characterized in that, The thickness of the first heat dissipation fin (101) is twice that of the second heat dissipation fin (201).

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