A stamped fin structure

Abstract

The utility model patent discloses a stamped fin structure, including a fin body, the fin body is wavy, and punching holes are distributed on the fin body. The spacing between two adjacent punching holes on the left and right is the horizontal spacing A of the punching holes, and the spacing between two adjacent punching holes on the top and bottom is the vertical spacing B of the punching holes. The punching height when the punching hole is formed is the punching height C, the inner diameter of the punching hole is the hole diameter D, and the deformation boss 4 generated by the punching process is the boss diameter E. The unpunched wave crests are flattened to obtain the wave crest flattening section F, the spacing between the wave crests of the corrugated plate is the wave crest spacing G, and the height of the stamped corrugated plate is the wave height H. The distribution structure of the punching holes is a cross arrangement or a triangular arrangement, and the punching holes are circular. The utility model aims to solve the problem of poor heat exchange performance of fins due to low wave height and flanging holes, and proposes a practical method for improving the heat exchange efficiency of fins.

Description

Technical Field

[0001] The utility model relates to a fin, in particular to a stamped fin structure. Background Art

[0002] The core component of the air-cooled heat exchanger is the heat exchange fin. The fin cuts the airflow and creates a turbulent area to improve the surface convection heat transfer efficiency of the metal heat exchange surface. Punching fins are a common type of heat exchange fins. For stamped fins, the wave height, punching height, and hole arrangement of the fins have a greater impact on the flow field. In actual engineering applications, the heat transfer efficiency of fins with different wave heights, punching heights, and hole arrangements varies greatly. There are many types of fins on the market, but there is room for improvement in actual heat transfer efficiency.

[0003] The principle of rib heat exchange is that the higher the rib height, the better the heat exchange effect according to the heat exchange formula. However, after the rib height exceeds a certain height, continuing to increase the height will increase the flow resistance and the heat exchange effect will not increase significantly. It should be noted that high flow resistance does not necessarily mean good heat exchange, and low flow resistance does not necessarily mean poor heat exchange.

[0004] Prior art document 1 (CN202229643U) discloses a fin of a surface air heat exchanger, including a fin body, wherein several rows of through holes parallel to each other are arranged in the length direction of the body, and each row of adjacent through holes are connected by a bridge, and the bridge is spaced from the body to form a long gap, which can reduce thermal resistance and improve heat exchange effect. However, the disadvantage of this technical document is that the structure is prone to deposit impurities, increasing the fin fouling coefficient, and the dense-grained structure is prone to "reverse fin" phenomenon in actual production, which has limited effect on improving the surface heat exchange efficiency of the fin and may even be counterproductive. Moreover, this public patent does not confirm the size range of key dimensions, and it is unclear whether it can be implemented in actual processing and production. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the utility model provides a stamped fin structure with high heat exchange efficiency and a clear range of key fin dimensions.

[0006] The utility model adopts the following technical solutions.

[0007] The fin body is a rectangular corrugated plate, and punching holes are obtained by punching at the wave crests of the fin body. The deformation generated by the punching process is a boss. The punching holes are distributed on the fin body, and the shape of the punching holes is circular; the spacing between two adjacent punching holes on the left and right is the horizontal spacing A of the set size of the punching holes, and the horizontal spacing A of the two adjacent punching holes on the left and right is equal; the spacing between two adjacent punching holes above and below is the vertical spacing B of the set size of the punching holes, and the horizontal spacing B of the two adjacent punching holes above and below is equal; the height of the punching holes when the punching holes are formed is the height C of the set size, and the height C of any two adjacent punching holes is equal; the inner diameter of the punching hole is the hole diameter D of the set size, and the hole diameter D of any two adjacent holes is equal; the deformation boss generated by the stamping process is the boss diameter E of the set size, and the boss diameter E of any two adjacent bosses is equal.

[0008] Preferably, the fin body is made of any one of aluminum alloy and copper alloy rectangular corrugated plates, and the thickness of the rectangular corrugated plate is 0.2-0.5 mm.

[0009] Preferably, the unpunched wave crests on the fin body are flattened to obtain wave crest flattening sections F of a set size, and any two adjacent wave crest flattening sections F are equal; the spacing between the wave crests of the corrugated plate is the wave crest spacing G of a set size, and any two adjacent wave crest spacings G are equal; the height of the stamped corrugated plate is the wave height H of a set size, and any two adjacent wave heights H are equal.

[0010] Preferably, the punching hole distribution structure is any one of a cross arrangement or a triangle arrangement.

[0011] Preferably, the cross arrangement is that the horizontal spacing between the punched holes on the first row of wave crests and the third row of wave crests is A, and the horizontal spacing A of the punched holes on the second row of wave crests is twice the horizontal spacing A of the holes in the first row.

[0012] Preferably, the triangular distribution is such that the horizontal spacing of the punched holes on the wave crests of the first row is A, the horizontal spacing A of the punched holes in the second row remains unchanged, and the punched holes are staggered to the right by one punched hole distribution from the first row.

[0013] Preferably, when the through hole diameter D is 12≤D≤13 mm, a cross arrangement is selected; when 16<D≤17 mm, a triangle arrangement is selected.

[0014] Preferably, when the through hole diameter D is: 12≤D≤13mm, 20≤A≤30mm, the horizontal hole spacing A=25mm; 20≤B≤30mm, the vertical hole spacing B=25mm; 16≤E≤20mm, the boss diameter E=18mm; 1.5≤F≤2.5mm, the wave peak flattening section F=2mm; 11≤G≤12mm, the wave peak spacing G=11.5mm; 1.5≤H≤2.2mm, the wave height H=1.8mm.

[0015] Preferably, when the through hole diameter D: 16<D≤17mm, 53≤A≤58mm, the horizontal hole spacing A=55mm; 45≤B≤50mm, the vertical hole spacing B=48mm; 31≤E≤33mm, the boss diameter E=32mm; 2.5≤F≤3.5mm, the wave peak flattening section F=3mm; 24.5≤G≤25.5mm, the wave peak spacing G=24mm; 2≤H≤2.4mm, the wave height H=2.2mm.

[0016] Preferably, in the case of the triangular arrangement or the cross arrangement, 3≤C≤5mm, and the punching height C=4mm.

[0017] The beneficial effect of the utility model is that, compared with the prior art,

[0018] 1) The fin structure described in the utility model can achieve the purpose of high heat exchange efficiency and low flow resistance;

[0019] 2) The principle of rib heat exchange is that the higher the rib height, the better the heat exchange effect according to the heat exchange formula. However, when the rib height exceeds a certain height, the flow resistance increases and the heat exchange effect does not increase significantly. Therefore, there is an optimal rib height. The wave height and punching height in the fin structure described in the utility model belong to the category of heat exchange ribs, which can achieve the highest heat exchange capacity.

[0020] 3) The hole arrangement in the fin structure described in the utility model meets the design principle of high-quality heat exchange fins, that is, the rib height with the highest heat exchange capacity is combined with the hole arrangement with the lowest flow resistance. The hole type arrangement is mainly based on fluid mechanics. The flow resistance of the cross arrangement is greater than that of the triangular arrangement. The flow resistance of the large hole is greater than that of the small hole. The punching height of the large hole is higher than that of the small hole. Based on the rib heat exchange principle and the hole flow resistance, the large holes are preferably arranged in a triangular shape, and the small holes are preferably arranged in a cross shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the fin;

[0022] Figure 2 It is a schematic diagram of the fin structure with cross-shaped punching holes;

[0023] Figure 3 It is a schematic diagram of the fin structure with a triangular arrangement of punched holes;

[0024] In the figure: 1, fin; 2, stamping hole; 3, crest; 4, boss. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The embodiments described in this application are only part of the embodiments of the utility model, not all of them. Based on the spirit of the utility model, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 As shown, an embodiment of the utility model provides a stamped fin structure, including a fin body 1, which is wavy, and has stamped holes 2 distributed on the fin body. The spacing between two adjacent stamped holes on the left and right is the horizontal spacing A of the punching hole setting size, and the horizontal spacing A of the two adjacent stamped holes on the left and right is equal. The spacing between two adjacent stamped holes above and below is the vertical spacing B of the punching hole setting size, and the horizontal spacing B of two adjacent stamped holes above and below is equal.

[0030] In a preferred but non-limiting embodiment of the utility model, the fin body is made of a rectangular corrugated plate made of aluminum alloy or copper alloy. Aluminum alloy is cheap and corrosion-resistant, but has relatively poor heat transfer performance, while copper alloy has good heat transfer performance, but is expensive and has poor corrosion resistance. Its thickness is 0.2-0.5 mm, preferably 0.3 mm.

[0031] The peaks 3 on the corrugated plate are punched to obtain punched holes, and the punched holes are circular in shape.

[0032] The height of the punching hole when the punching hole is formed is a height C of a set size, and any two adjacent punching hole heights C are equal; the inner diameter of the punching hole is a hole diameter D of a set size, and any two adjacent hole diameters D are equal; the deformation boss 4 generated by the stamping process is a boss diameter E of a set size, and any two adjacent boss diameters E are equal.

[0033] Further preferably, the unpunched peaks on the fin body are flattened to obtain peak flattening sections F of a set size, and any two adjacent peak flattening sections F are equal; the spacing between the peaks of the corrugated plate is the peak spacing G of a set size, and any two adjacent peak spacings G are equal; the height of the stamped corrugated plate is the wave height H of a set size, and any two adjacent wave heights H are equal.

[0034] It is worth noting that, for heat exchange, the ability to improve heat exchange efficiency by leveling the unpunched wave peaks is limited, but leveling can reduce the deposition of fine impurities (such as dust) at sharp corners and reduce the "ash blockage" phenomenon of the radiator.

[0035] The punching hole distribution structure is one of a cross arrangement and a triangle arrangement.

[0036] In a preferred but non-limiting embodiment of the utility model, in actual application, the cross arrangement or triangular arrangement can be used in combination. In principle, the triangular arrangement is preferred for large apertures, and the cross arrangement is preferred for small apertures. The triangular arrangement is suitable for areas where the flow resistance of the equipment is too large to reduce the flow resistance, and the cross arrangement is suitable for areas where the flow resistance of the equipment is too small to increase the flow resistance and improve the heat exchange efficiency.

[0037] The cross arrangement, such as Figure 2 As shown, taking the three rows in the figure as an example, the first row and the third row maintain the horizontal hole spacing A, and the punching holes are evenly distributed. The second row of evenly distributed punching holes has a horizontal hole spacing A that is twice the horizontal hole spacing A of the first row.

[0038] The triangular distribution, such as Figure 3 As shown, taking the two rows in the figure as an example, the first row maintains the horizontal hole spacing A and evenly distributes the punched holes, and the punched holes in the second row maintain the horizontal hole spacing A unchanged, and are staggered to the right of the first row.

[0039] In a preferred but non-limiting embodiment of the present invention, when the through hole diameter D is 12≤D≤13 mm, a cross arrangement is preferred, and when 16<D≤17 mm, a triangular arrangement is preferred.

[0040] It is worth noting that the hole arrangement is mainly based on fluid mechanics. The flow resistance of the cross arrangement is greater than that of the triangular arrangement, the flow resistance of the large hole is greater than that of the small hole, and the punching height of the large hole is higher than that of the small hole. Based on the rib heat exchange principle and hole layout flow resistance, the large holes are preferably arranged in a triangular shape, and the small holes are preferably arranged in a cross shape.

[0041] Further preferably, when the through hole diameter D: 12≤D≤13mm, 20≤A≤30mm, preferably the horizontal hole spacing A=25mm; 20≤B≤30mm, preferably the vertical hole spacing B=25mm; 16≤E≤20mm, preferably the boss diameter E=18mm; 1.5≤F≤2.5mm, preferably the peak flattening section F=2mm; 11≤G≤12mm, preferably the peak spacing G=11.5mm; 1.5≤H≤2.2mm, preferably the wave height H=1.8mm.

[0042] Further preferably, when the through hole diameter D: 16<D≤17mm, 53≤A≤58mm, preferably the horizontal hole spacing A=55mm; 45≤B≤50mm, preferably the vertical hole spacing B=48mm; 31≤E≤33mm, preferably the boss diameter E=32mm; 2.5≤F≤3.5mm, preferably the peak flattening section F=3mm; 24.5≤G≤25.5mm, preferably the peak spacing G=24mm; 2≤H≤2.4mm, preferably the wave height H=2.2mm.

[0043] In a preferred but non-limiting embodiment of the present invention, in the case of a triangular arrangement or a cross arrangement, 3≤C≤5mm, and preferably the punching height C=4mm.

[0044] It is worth noting that for the above-mentioned components, stamping forming process is generally adopted, and 3D printing can also be used for production.

[0045] Another embodiment of the present application provides an application of a stamped fin structure:

[0046] like Figure 2As shown, the fin structure of the punching arrangement described in the present application is a cross arrangement. Taking the three rows in the figure as an example, the first and third rows on the fin body are evenly distributed punching holes with an inner diameter D of 12.3mm, and the horizontal hole spacing A is 25mm. The second row is evenly distributed punching holes with an inner diameter of 12.3mm, and the horizontal hole spacing A is 50mm, forming a cross arrangement. The vertical hole spacing B is 25mm, the punching height C is 4mm, the boss diameter E is 18mm, the peak flattening section F is 2mm, the peak spacing G is 11.5mm, and the wave height H is 1.8mm.

[0047] In practical applications, stamped fins are often used in air-cooled heat exchanger scenarios, and the fin cross-section, such as Figure 3 As shown, it is the windward surface (the normal surface to the wind direction). Except for this surface, the fins can be placed horizontally, vertically, or tilted. The fins are mainly stacked and can be stacked layer by layer into a rectangle. The number is determined according to the actual heat exchange capacity and heat exchange area. The larger the surface area of ​​the fins, the fewer the number required, and the larger the heat exchange capacity, the more the number required.

[0048] The beneficial effect of the present invention is that, compared with the prior art,

[0049] 1) The fin structure described in the utility model can achieve the purpose of high heat exchange efficiency and low flow resistance;

[0050] 2) The principle of rib heat exchange is that the higher the rib height, the better the heat exchange effect according to the heat exchange formula. However, when the rib height exceeds a certain height, the flow resistance increases and the heat exchange effect does not increase significantly. Therefore, there is an optimal rib height. The wave height and punching height in the fin structure described in the utility model belong to the category of heat exchange ribs, which can achieve the highest heat exchange capacity.

[0051] 3) The hole arrangement in the fin structure described in the utility model meets the design principle of high-quality heat exchange fins, that is, the rib height with the highest heat exchange capacity is combined with the hole arrangement with the lowest flow resistance. The hole type arrangement is mainly based on fluid mechanics. The flow resistance of the cross arrangement is greater than that of the triangular arrangement. The flow resistance of the large hole is greater than that of the small hole. The punching height of the large hole is higher than that of the small hole. Based on the rib heat exchange principle and the hole flow resistance, the large holes are preferably arranged in a triangular shape, and the small holes are preferably arranged in a cross shape.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A stamped fin structure, comprising a fin body (1), characterized in that: The fin body (1) is a rectangular corrugated plate, and a punching hole (2) is obtained by punching at the wave crest (3) of the fin body. The deformation generated by the punching process is a boss (4). The punching holes (2) are distributed on the fin body, and the shape of the punching holes (2) is circular; the spacing between two adjacent punching holes on the left and right is a horizontal spacing A of a set size of the punching holes, and the horizontal spacing A of two adjacent punching holes on the left and right is equal; the spacing between two adjacent punching holes on the top and bottom is a vertical spacing B of a set size of the punching holes, and the horizontal spacing B of two adjacent punching holes on the top and bottom is equal; the height of the punching hole when the punching hole is formed is a height C of a set size, and the height C of any two adjacent punching holes is equal; the inner diameter of the punching hole is a hole diameter D of a set size, and the hole diameters D of any two adjacent holes are equal; the deformed boss generated by the punching process is a boss diameter E of a set size, and the diameters E of any two adjacent bosses are equal; The punching hole distribution structure is any one of a cross arrangement or a triangle arrangement.

2. A stamped fin structure according to claim 1, characterized in that: The fin body (1) is made of any rectangular corrugated plate made of aluminum alloy or copper alloy, and the thickness of the rectangular corrugated plate is 0.2-0.5 mm.

3. A stamped fin structure according to claim 1, characterized in that: The unpunched wave crests on the fin body (1) are flattened to obtain wave crest flattening sections F of a set size, and any two adjacent wave crest flattening sections F are equal; the spacing between the wave crests of the corrugated plate is a wave crest spacing G of a set size, and any two adjacent wave crest spacings G are equal; the height of the stamped corrugated plate is a wave height H of a set size, and any two adjacent wave heights H are equal.

4. A stamped fin structure according to claim 1, characterized in that: The cross arrangement is that the horizontal spacing between the punched holes (2) on the first row of wave crests and the third row of wave crests is A, and the horizontal spacing A of the punched holes on the second row of wave crests is twice the horizontal spacing A of the holes in the first row.

5. A stamped fin structure according to claim 1, characterized in that: The triangular arrangement is such that the horizontal spacing of the punching holes (2) on the wave crests of the first row is A, and the horizontal spacing A of the punching holes in the second row remains unchanged, and the distribution of the punching holes is staggered to the right by one.

6. A stamped fin structure according to claim 1, characterized in that: When the through hole diameter D is: 12≤D≤13mm, select the cross arrangement; when 16<D≤17mm, select the triangle arrangement.

7. A stamped fin structure according to claim 1, characterized in that: When the through hole diameter D is: 12≤D≤13mm, 20≤A≤30mm, the horizontal hole spacing A=25mm; 20≤B≤30mm, the vertical hole spacing B=25mm; 16≤E≤20mm, the boss diameter E=18mm; 1.5≤F≤2.5mm, the wave peak flattening section F=2mm; 11≤G≤12mm, the wave peak spacing G=11.5mm; 1.5≤H≤2.2mm, the wave height H=1.8mm.

8. A stamped fin structure according to claim 1, characterized in that: When the through hole diameter D: 16<D≤17mm, 53≤A≤58mm, the horizontal hole spacing A=55mm; 45≤B≤50mm, the vertical hole spacing B=48mm; 31≤E≤33mm, the boss diameter E=32mm; 2.5≤F≤3.5mm, the wave peak flattening section F=3mm; 24.5≤G≤25.5mm, the wave peak spacing G=24mm; 2≤H≤2.4mm, the wave height H=2.2mm.

9. A stamped fin structure according to claim 1, characterized in that: In the case of the triangular arrangement or the cross arrangement, 3≤C≤5mm, and the punching height C=4mm.

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