Oblique wave fin

Abstract

The utility model discloses an oblique wave fin which comprises a fin body, the top of the fin body is a wave crest, the bottom of the fin body is a wave trough, and a side wall is arranged between the wave crest and the wave trough. The fin body extends in the length direction, corrugated sheets are arranged on the side walls, an inclined included angle alpha exists between each corrugated sheet and the horizontal plane, the width of the air inlet end of each corrugated sheet is a, the width of the air outlet end of each corrugated sheet is b, a is larger than b, and a-shaped structures are formed. Therefore, by adjusting the angles of the corrugated sheets, the anti-blocking performance can be achieved while the heat exchange efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange devices, in particular to a slant wave fin. Background Art

[0002] For the radiator used for non-road machine cooling, its cold fins are usually wavy fins. With the improvement of emission requirements and cost control requirements, the traditional wavy fins can no longer meet the needs of customers for radiators. The windowed fins can improve the heat dissipation performance to a certain extent. However, due to the generally poor working environment of non-road machines, blockage is likely to occur, which is a problem encountered in the industry. To solve this problem, the slant wave fins with better air turbulence effect came into being.

[0003] At present, although the existing slant wave fins have improved in heat dissipation performance and anti-blocking performance compared with the traditional wavy fins, the structure of the slant wave fins without precise design still cannot meet the requirements of jointly improving heat dissipation and anti-blocking performance.

[0004] In the prior art, there is a patent application document with the publication number CN211236908U and the patent name of slant wave fins and heat exchangers. In this document, by establishing a mathematical model and setting the shape of the corrugated sheet, the heat dissipation and anti-blocking performance are satisfied. Since the slant wave fins adopt a symmetric structure and control the inclination angle within the range of 30° - 45°, in actual use, the actual heat dissipation effect of the slant wave fins with this inclination angle does not reach the set requirements. Summary of the Utility Model

[0005] To overcome the above defects, the purpose of the utility model is to provide a slant wave fin, which can further improve the heat exchange efficiency and achieve the anti-blocking performance by adjusting the angle of the corrugated sheet.

[0006] To achieve the above purpose, the utility model provides a slant wave fin, including a fin body. The top of the fin body is a wave crest, the bottom is a wave trough, and the side wall is between the wave crest and the wave trough. The fin body extends along the length direction, and corrugated sheets are arranged on the side wall. There is an inclination angle α between the corrugated sheet and the horizontal plane. The width of the air inlet end of the corrugated sheet is a, and the width of the air outlet end is b, and a > b, forming a wedge-shaped structure.

[0007] Preferably, the corrugated sheets are arranged in a staggered manner on both the inner and outer sides of the side wall, and the vertical distance between the ends of two adjacent corrugated sheets is 5.35 mm.

[0008] Preferably, the inclination angle α is 28°.

[0009] Preferably, a V shape is formed between two adjacent side walls and the wave trough at the bottom.

[0010] Preferably, a = 2.1 mm and b = 1.9 mm.

[0011] Preferably, along the gas flow direction, the cross-section of the side wall at the air inlet end of the fin body is a plane, and the cross-section of the side wall at the air outlet end is wavy.

[0012] After adopting the above technical solution, the beneficial technical effects achieved by the present utility model are as follows:

[0013] 1. Since the inclination angle α is appropriately adjusted and the angle of the inclination angle α is set to be less than 30°, during actual use, the air flow can be accelerated to pass through. Therefore, while solving the blockage problem, the use effect is improved.

[0014] 2. Since the widths of the air inlet end and the air outlet end of the corrugated sheet are changed, the width of the air inlet end of the corrugated sheet is a, the width of the air outlet end is b, and a > b. According to the axiom of gas flow continuity, when the heat-dissipating air passes through a cross-section with a reduced area, an acceleration phenomenon will occur, improving the kinetic energy of the flowing air and accelerating the air flow. Therefore, the adjustment of the above widths can further improve the heat exchange efficiency.

[0015] 3. Since a V shape is formed between the adjacent two side walls and the bottom trough, a simple trapezoid is formed between the adjacent wave crests and troughs. The change in area will make the air flow better and the heat dissipation effect will also be better. Description of the Drawings

[0016] Figure 1 is a schematic view of one end (wavy shape) of the inclined wave fin of the present utility model;

[0017] Figure 2 is a schematic view of the other end (trapezoidal shape) of the inclined wave fin of the present utility model;

[0018] Figure 3 is the Figure 1 front view of the present utility model;

[0019] Figure 4 is Figure 3 the cross-sectional view at A-A in ;

[0020] Figure 5 is Figure 3 the enlarged view at B in ;

[0021] In the figure, 1, fin body; 11, wave crest; 12, side wall; 13, wave trough;

[0022] 2, corrugated sheet;

[0023] α: inclination angle. Detailed Embodiment

[0024] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] See Figures 1-5 , the present utility model provides a slant wave fin, which includes a fin body 1. The top of the fin body 1 is a wave crest 11, the bottom is a wave trough 13, and between the wave crest 11 and the wave trough 13 is a side wall 12; the fin body 1 extends along the length direction, and corrugated sheets 2 are provided on the side wall 12. There is an inclination angle α between the corrugated sheet 2 and the horizontal plane, and the inclination angle α < 30°. Existing slant wave fins are all integrally processed and formed. The wave crest 11, the wave trough 13 and the middle side wall 12 form a unit, and then extend in one direction or two directions. The extension directions are generally the length direction and the width direction. In order to increase the air contact area, corrugated sheets 2 are provided on the side wall 12. The groove part in the middle of the corrugated sheet 2 is the air flow channel. In order to accelerate the air flow, along the direction of gas flow, there is a certain inclination angle for the corrugated sheet 2. Generally, the inclination angle is 45° or 30°. For such standard inclination angles, the processing is relatively convenient and the requirements for equipment are relatively low. According to the actual use effect, an inclination angle of 28° is adopted for α, and the use and installation effects are the best. In the actual production process, the wave crest 11 at the top and the wave trough 13 at the bottom can be flat or arc-shaped. Affected by the processing equipment, it does not affect the use effect.

[0026] The width of the air inlet end of the corrugated sheet 2 of the present utility model is a, and the width of the air outlet end is b, and a > b. The width of the air inlet end is slightly larger than the width of the air outlet end. Such a wedge-shaped structure can utilize the physical law of continuous gas flow to achieve accelerated gas passage, thereby improving the heat exchange efficiency. Affected by the volume of the fin body 1, the values of a and b cannot differ too much.

[0027] Corrugated sheets 2 are alternately provided on both the inner and outer sides of the side wall 12 of the present utility model, and the vertical distance between the ends of two adjacent corrugated sheets 2 is 5.35 mm. The corrugated sheet 2 is mainly to increase the area of the side wall 12. With the increase of the contact area, the heat dissipation effect will be better. The vertical distance is 5.35 mm. Generally, the distance range is between 5.15 - 5.45. According to the processing accuracy and error level of different equipment, 5.2 mm and 5.3 mm (the values after taking integers) can generally be selected. Generally, the processing accuracy is guaranteed within the range of 5.35 mm, and the tolerance range generally used is plus or minus 0.2.

[0028] The inclination angle α of the present utility model is 28°. The inclination angle α is preferably 28°, and it can also be 25° or 20°. When the inclination angle α is 28°, the processing cost is the lowest. On the basis of the original production line, appropriate adjustment can complete the production. Compared with the angle above 30° in the comparative document, the measured effect of the present utility model is better, and the overall height of the heat dissipation fins is reduced, so it is easier to install in a narrow space.

[0029] A V shape is formed between two adjacent side walls 12 of the present utility model and the trough 13 at the bottom. After forming the V shape, the extension length can be increased, the air circulation will be better, and it is easier to clean in the later stage.

[0030] In the present utility model, a = 2.1 mm and b = 1.9 mm. According to the principle of the continuous flow of gas or liquid, when an air fluid passes through a pipe with a smaller cross-sectional area, an acceleration phenomenon will occur, which is determined by the principle of fluid continuity. According to actual measurement, when the gap between the air inlet end and the air outlet end is 2 mm, that is, a = 2.1 mm and b = 1.9 mm, the mold for processing the inclined wave fins of the present utility model hardly needs to be replaced, so the production cost is hardly increased, and the heat dissipation effect is significantly improved.

[0031] Along the gas traveling direction of the present utility model, the cross-section of the side wall 12 at the air inlet end of the fin body 1 is a plane, and the cross-section of the side wall 12 at the air outlet end is wavy. During production and installation, it is found that if both side walls 12 are wavy (as shown in the comparative document CN211236908U), interference is likely to occur during installation, and more precise clamping tools are required during clamping and cutting, resulting in a higher cost. However, using a smooth plane at one end is easier to clamp, and cutting processing will be more convenient. By setting the two ends of the inclined wave fins to an asymmetric shape, not only can the heat exchange time be increased, but also it is convenient for clamping and fixing, and it is also convenient for installation.

[0032] According to the test, a conventional product corrugated heat dissipation belt with a wave pitch of 5.35 mm, an inclination angle α of 28°, a thickness of 0.12 mm, a height of the corrugated sheet 2 of 10.0 mm, a width of the air inlet end of a = 2.1 mm, and a width of the air outlet end of b = 1.9 mm is made, and the following data is obtained:

[0033]

[0034] According to the axiom, in the case of fans with the same efficiency, the smaller the air resistance value, the faster the passing speed, and the faster the speed, the better the heat dissipation effect. Referring to the above table, in this embodiment, due to changing the sizes of the widths of the air inlet end and the air outlet end, in an environment with the same wind speed, the air resistance value of the corrugated sheet is reduced, so the power consumed is smaller and the heat dissipation effect is better.

[0035] Of course, the present utility model may also have many other embodiments. Without departing from the spirit and essence of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model. However, these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present utility model.

Claims

1. A slanted wave fin, characterized in that: It comprises a fin body, wherein the top of the fin body is a wave crest, the bottom is a wave trough, and a side wall is between the wave crest and the wave trough; The fin body extends in the length direction, and the side wall is provided with a corrugated sheet, and there is an inclined angle α between the corrugated sheet and the horizontal plane. The width of the corrugated sheet at the air inlet end is a, the width of the corrugated sheet at the air outlet end is b, and a>b, forming a wedge-shaped structure.

2. The oblique wave fin according to claim 1, characterized in that: The inclination angle α is less than 30°.

3. The oblique wave fin according to claim 2, characterized in that: The tilt angle α is 28°.

4. The oblique wave fin according to claim 3, characterized in that: a=2.1mm,b=1.9mm.

5. The oblique wave fin according to claim 2, characterized in that: The inner and outer sides of the side wall are staggered with corrugated sheets, and the vertical distance between the ends of two adjacent corrugated sheets is 5.35 mm.

6. The oblique wave fin according to claim 1, characterized in that: A V shape is formed between the two adjacent side walls and the wave valley at the bottom.

7. The oblique wave fin according to claim 6, characterized in that: Along the gas traveling direction, the side wall section of the air inlet end of the fin body is a plane, and the side wall section of the air outlet end is a wave shape.

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