Heat exchange fin and tube fin type heat exchanger

Abstract

The invention relates to a heat exchange fin and a tube fin type heat exchanger, the heat exchange fin can be used for exchanging heat with fluid outside a tube, the heat exchange fin is provided with a plurality of heat exchange tube holes, and the heat exchange fin can be used for being connected to a heat exchange tube bundle through the heat exchange tube holes; the heat exchange fins are provided with a plurality of turbulent flow structures, and the turbulent flow structures are formed by sinking and / or protruding from the surfaces of the heat exchange fins in the thickness direction of the heat exchange fins. The surface of the turbulent flow structure is arc-shaped, and the turbulent flow structure is an axisymmetric structure; wherein the included angle between the long axis and / or the short axis of the turbulent flow structure and the flowing direction of fluid outside the pipe is alpha, and alpha is larger than 0 degree and smaller than 90 degrees. According to the heat exchange fin, the turbulent flow structures are arranged, when fluid outside the pipe flows through the turbulent flow structures, the turbulent flow degree of the fluid outside the pipe is increased by changing the flowing direction and speed of the fluid outside the pipe through the design of the turbulent flow protrusions, the boundary layer can be better damaged by the turbulent flow protrusions, and therefore the heat exchange efficiency is improved; and the heat exchange performance of the finned tube heat exchanger can be improved under the same air volume.

Description

[Technical field]

[0001] The present application relates to the field of heat exchange technology, and in particular to a heat exchange fin and a tube-fin heat exchanger. [Background technology]

[0002] The tube-fin heat exchanger is a highly efficient heat exchange equipment that improves heat transfer efficiency by increasing the heat exchange area. It is mainly composed of a heat exchange tube bundle and heat exchange fins. The temperature of the fluid in the tube bundle is transferred to the heat exchange fins, and the heat exchange fins then remove heat through heat exchange with the fluid outside the tube. In order to enhance the heat exchange performance of the heat exchanger, a heat exchange fin with a window structure is usually used. Specifically, the fluid outside the tube will form a boundary layer when it approaches the surface of the heat exchange fin. The flow rate in the boundary layer is slow. As the heat exchange process proceeds, the accumulation thickness of the boundary layer increases, the thermal resistance increases, and the effective transfer of heat is hindered. After the window structure is set, the window fin can cut the boundary layer of the fluid outside the tube in the flow direction. Cutting the boundary layer can improve the heat exchange efficiency between the fluid outside the tube and the surface of the heat exchange fin.

[0003] In the process of implementing this application, the inventors found that there are at least the following technical problems in the prior art:

[0004] When the tube-fin heat exchanger is performing heat exchange, the flow resistance on the fluid side outside the tube accounts for about 80% of the total heat exchange resistance. In the existing technical solutions, while the window structure is used to improve the heat transfer coefficient, the flow of the fluid outside the tube becomes irregular, resulting in a significant increase in the flow resistance of the fluid outside the tube, and the increase in flow resistance will be much greater than the increase in heat exchange performance. [Summary of the invention]

[0005] In view of this, the present application provides a heat exchange fin and a tube-fin heat exchanger, and by providing a turbulent structure, the heat exchange performance of the tube-fin heat exchanger can be improved under the same air volume.

[0006] In a first aspect, the present application provides a heat exchange fin, wherein the heat exchange fin is provided with a plurality of heat exchange tube holes, and the stacked heat exchange fins can be used to be connected to a heat exchange tube bundle through the heat exchange tube holes;

[0007] The heat exchange fin is provided with a plurality of spoiler structures, and along the thickness direction of the heat exchange fin, the spoiler structures are formed by depressions and / or protrusions on the surface of the heat exchange fin; the surface of the spoiler structure is arc-shaped, and the spoiler structure is an axisymmetric structure; wherein the angle between the major axis and / or the minor axis of the spoiler structure and the flow direction of the fluid outside the tube is α, 0°<α<90°.

[0008] In some embodiments, the spoiler structure includes:

[0009] An arc-shaped main body portion, wherein the arc-shaped main body portion is projected as a rectangle on the surface of the heat exchange fin;

[0010] The arc-shaped connecting portion is arranged at both ends of the arc-shaped main portion; the arc-shaped connecting portion is projected as a semicircle on the surface of the heat exchange fin, and the arc-shaped main portion and the arc-shaped connecting portion have the same height.

[0011] In some embodiments, the distance between adjacent heat exchange fins is G, and the height of the spoiler structure is L;

[0012] The relationship between the fin spacing G between adjacent heat exchange fins and the height L of the spoiler structure satisfies: 0.1G<L<0.9G.

[0013] In some embodiments, along the width direction of the heat exchange fin, the row spacing between adjacent heat exchange tube holes is P, and the radius of the arc-shaped connecting portion is D;

[0014] The relationship between the radius D of the arc-shaped connecting portion and the row spacing P of the heat exchange tube holes satisfies: 0.1P<2D<0.25P.

[0015] In some embodiments, along the length direction of the heat exchange fin, the center distance between adjacent heat exchange tube holes is W, the length of the arc-shaped main body is B, and the length of the spoiler structure is R=2D+B;

[0016] The relationship between the length R of the spoiler structure and the center distance W of the heat exchange tube holes satisfies: 0.1W<R<0.5W.

[0017] In some embodiments, the heat exchange fins are stacked.

[0018] In some embodiments, the flow-disturbing structures on the heat-exchange fins are evenly distributed in space with the heat-exchange tube bundle as the center.

[0019] In some embodiments, the spoiler structure is protrudingly disposed on one side of the heat exchange fin.

[0020] In some embodiments, the shape of the heat exchange tube hole is at least one of a circle, an ellipse, or a regular polygon.

[0021] In a second aspect, the present application provides a tube-fin heat exchanger, comprising a heat exchange tube bundle and the heat exchange fins described in any one of the first aspects.

[0022] By adopting the above technical solution, the present application has at least the following beneficial effects:

[0023] The heat exchange fin provided by the present application has a surface depression and / or protrusion to form a spoiler structure, which increases the heat exchange area of ​​the heat exchange fin and can improve the heat exchange efficiency; and when the outer tube fluid flows through the spoiler structure, compared with the window fin, the boundary layer of the gas in the flow direction is continuously cut to increase the flow resistance, the design of the spoiler protrusion changes the direction and speed of the outer tube fluid flow, thereby increasing the turbulence of the outer tube fluid, and the spoiler protrusion can better destroy the boundary layer, thereby improving the heat exchange efficiency and improving the heat exchange performance of the tube-fin heat exchanger under the same air volume. At the same time, the angle between the long axis and / or short axis of the spoiler structure and the flow direction of the outer tube fluid is α, 0°<α<90°, and the fixed angle makes the outer tube fluid flow along a fixed path on the surface of the heat exchange fin, reducing the uncertainty of the fluid flow, thereby reducing the generation of vortices, avoiding flow separation, and reducing the flow resistance of the outer tube fluid to a certain extent.

Brief Description of the Drawings

[0024] Figure 1 A schematic diagram of a portion of the structure of the heat exchange fin provided in this application;

[0025] Figure 2 A cross-sectional view of the heat exchange fin provided for this application;

[0026] Figure 3 A schematic diagram of the structure of the turbulence structure of the heat exchange fin provided in this application;

[0027] Figure 4 A front view of the spoiler structure of the heat exchange fin provided in the present application;

[0028] Figure 5 A top view of the spoiler structure of the heat exchange fin provided in the present application;

[0029] Figure 6 A side view of the spoiler structure of the heat exchange fin provided in the present application.

[0030] Figure ID:

[0031] 1. heat exchange tube hole; 2. spoiler structure; 21. arc-shaped main body; 22. arc-shaped connecting part. [Specific implementation method]

[0032] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0034] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0035] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0037] When the tube-fin heat exchanger is performing heat exchange, the flow resistance on the fluid side outside the tube accounts for about 80% of the total heat exchange resistance. In the existing technical solutions, while the window structure is used to improve the heat transfer coefficient, the flow of the fluid outside the tube becomes irregular, resulting in a significant increase in the flow resistance of the fluid outside the tube, and the increase in flow resistance will be much greater than the increase in heat exchange performance.

[0038] In view of this, the present application provides a heat exchange fin, which can be configured to form a tube-fin heat exchanger with a heat exchange tube bundle. The heat exchange fin can be used to exchange heat with the fluid outside the tube (the fluid outside the heat exchange tube bundle, usually air). Please refer to Figure 1 to Figure 6 The heat exchange fin is provided with a plurality of heat exchange tube holes 1, and the heat exchange fin can be used to be connected to the heat exchange tube bundle through the heat exchange tube holes 1;

[0039] The heat exchange fin is provided with a plurality of spoiler structures 2, and along the thickness direction of the heat exchange fin, the spoiler structure 2 is formed by depressions and / or protrusions on the surface of the heat exchange fin; the surface of the spoiler structure 2 is arc-shaped, and the spoiler structure 2 is an axisymmetric structure; wherein, the angle between the major axis and / or the minor axis of the spoiler structure 2 and the flow direction of the fluid outside the tube is α, 0°<α<90°.

[0040] In the above scheme, the heat exchange fin provided by the present application has a concave and / or convex surface to form a spoiler structure 2, which increases the heat exchange area of ​​the heat exchange fin and can improve the heat exchange efficiency; and when the outer tube fluid flows through the spoiler structure 2, compared with the window fin, the boundary layer of the gas in the flow direction is continuously cut to increase the flow resistance, the design of the spoiler protrusion changes the direction and speed of the outer tube fluid flow, thereby increasing the turbulence of the outer tube fluid, and the spoiler protrusion can better destroy the boundary layer, thereby improving the heat exchange efficiency and improving the heat exchange performance of the tube-fin heat exchanger under the same air volume. At the same time, the angle between the long axis and / or short axis of the spoiler structure 2 and the flow direction of the outer tube fluid is α, 0°<α<90°, and the fixed angle causes the outer tube fluid to flow along a fixed path on the surface of the heat exchange fin, reducing the uncertainty of the fluid flow, thereby reducing the generation of vortices, avoiding flow separation, and reducing the flow resistance of the outer tube fluid to a certain extent.

[0041] In some embodiments, the tube-fin heat exchanger includes a heat exchange tube bundle and a plurality of heat exchange fins. Further, the plurality of heat exchange fins are stacked.

[0042] The heat exchange tube bundle is composed of a plurality of slender tubes. The material of the tubes has good thermal conductivity. For example, copper metal or aluminum metal can be used. The material of the tubes can be selected according to actual needs and is not limited here. Fluid in the tube is placed inside the heat exchange tube bundle. The fluid in the tube is used to absorb the heat of the object to be radiated. After absorbing the heat, the fluid in the tube transfers the heat to the outside of the heat exchange tube bundle through the tube wall of the heat exchange tube bundle.

[0043] The heat exchange fins are connected to the heat exchange tube bundle. Since the heat exchange rate is proportional to the surface area, the heat exchange area of ​​the tube-fin heat exchanger can be increased by setting the heat exchange fins, thereby improving the heat exchange efficiency. The material of the heat exchange fins also has good thermal conductivity, and can be copper or aluminum, for example. The material of the heat exchange fins can be selected according to actual needs, and is not limited here.

[0044] The heat exchange fins and the heat exchange tube bundle are connected through a plurality of heat exchange tube holes 1. Specifically, the heat exchange tube holes 1 are distributed in a dotted manner on the heat exchange fins. When the heat exchange fins are sleeved on the heat exchange tube bundle through the heat exchange tube holes 1, they can be fixed by mechanical connections such as welding and interference fit or by bonding with heat conductive adhesive to ensure a stable connection between the heat exchange fins and the heat exchange tube bundle. The connection method of the two can be selected according to actual needs and is not limited here.

[0045] The shape of the heat exchange tube hole 1 used in the present application is at least one of a circle, an ellipse or a regular polygon, and the shape of the heat exchange tube hole can be selected according to actual needs, and is not limited here. Preferably, the shape of the heat exchange tube hole 1 is a circle, and the diameter of the circle is selected according to the volume of the heat exchange fins. Adjacent heat exchange tube holes 1 are arranged at equal intervals, wherein the row spacing of adjacent heat exchange tube holes 1 along the width direction of the heat exchange fins is P; along the length direction of the heat exchange fins, the center spacing of adjacent heat exchange tube holes 1 is W, and the size of P and W can be adjusted according to the volume of the tube-fin heat exchanger, and is not limited here.

[0046] Optionally, the arrangement of the heat exchange fins on the heat exchange tube bundle can be radial or equally spaced stacked; preferably, the heat exchange fins of the present application are equally spaced stacked, and the distance between adjacent heat exchange fins is G, and the size of G can be adjusted according to the volume of the tube-fin heat exchanger. And with the heat exchange tube bundle as the center, the turbulent structure 2 on the heat exchange fin is evenly distributed in space, enhancing the heat exchange effect of the tube-fin heat exchanger. The heat exchange fins can increase the heat exchange area of ​​the tube-fin heat exchanger and improve the heat exchange efficiency. In actual use, the heat transferred by the fluid in the tube through the tube wall of the heat exchange tube bundle is transferred to the heat exchange fins, and then the heat exchange fins and the fluid outside the tube perform a heat exchange process.

[0047] In some embodiments, along the thickness direction of the heat exchange fin, the surface of the heat exchange fin is concave and / or convex to form a spoiler structure 2. For example, the spoiler structure can be formed by the back side of the heat exchange fin being concave toward the front side, or the front side of the heat exchange fin being concave toward the back side, or the back side of some heat exchange fins being concave toward the front side to form a first spoiler structure, or the front side of the heat exchange fin being concave toward the back side to form a second spoiler structure. The protruding direction of the spoiler structure 2 can be selected according to actual needs, and is not limited here. Preferably, in the heat exchange fin of the present application, the back side of the heat exchange fin is concave toward the front side to form a spoiler structure, that is, it is only protruded and arranged on one side of the heat exchange fin.

[0048] The surface of the spoiler structure 2 is arc-shaped, and the spoiler structure 2 is an axisymmetric structure. Specifically, the spoiler structure 2 includes: an arc-shaped main body 21, the arc-shaped main body 21 is projected as a rectangle on the surface of the heat exchange fin; and an arc-shaped connecting part 22, which is arranged at both ends of the arc-shaped main body 21, and the arc-shaped connecting part 22 is projected as a semicircle on the surface of the heat exchange fin, and the arc-shaped main body 21 and the arc-shaped connecting part 22 are equal in height, that is, the spoiler structure 2 of the present application is in a "pill shape".

[0049] The height of the spoiler structure 2 is L, and the relationship between the sheet spacing G of adjacent heat exchange fins and the height L of the spoiler structure 2 satisfies: 0.1G<L<0.9G. Optionally, the relationship between the sheet spacing G of adjacent heat exchange fins and the height L of the spoiler structure 2 can be 0.11G, 0.21G, 0.31G, 0.41G, 0.51G, 0.61G, 0.71G, 0.81G and 0.89G, etc., or other values ​​within the range, which are not limited here. It can be understood that the relationship between the sheet spacing G of adjacent heat exchange fins and the height L of the spoiler structure 2 is within the above range. While the spoiler structure 2 can reduce the thermal resistance, the raised spoiler structure will not occupy a large space position, so that there is still a certain space size between adjacent heat exchange fins to ensure the flow space of the fluid outside the tube, and more spoiler structures 2 can be arranged to further enhance the fluid disturbance and reduce the boundary layer thickness.

[0050] The radius of the arc-shaped connection part 22 is D, and the relationship between the radius D of the arc-shaped connection part 22 and the row spacing P of the heat exchange tube hole 1 satisfies: 0.1P<2D(diameter)<0.25P. Optionally, the relationship between the diameter 2D of the arc-shaped connection part 22 and the row spacing P of the heat exchange tube hole 1 can be 0.11P, 0.13P, 0.15P, 0.17P, 0.19P, 0.21P, 0.23P and 0.24P, etc., or other values ​​within the range, which are not limited here. It can be understood that the relationship between the radius D of the arc-shaped connection part 22 and the row spacing P of the heat exchange tube hole 1 is within the above range. While the spoiler structure 2 can reduce the thermal resistance, the raised spoiler structure will not occupy a large space position, so that there is still a certain space size between adjacent heat exchange fins to ensure the flow space of the fluid outside the tube, and more spoiler structures 2 can be arranged to further enhance the fluid disturbance and reduce the boundary layer thickness.

[0051] The length of the arc-shaped main body 21 is B, the total length of the spoiler structure 2 is R=2D+B, and the relationship between the length R of the spoiler structure 2 and the center spacing W of the heat exchange tube hole 1 satisfies: 0.1W<R<0.5W. Optionally, the relationship between the length R of the spoiler structure 2 and the center spacing W of the heat exchange tube hole 1 can be 0.11W, 0.21W, 0.31W, 0.41W and 0.49W, etc., or other values ​​within the range, which are not limited here. It can be understood that the relationship between the length R of the spoiler structure 2 and the center spacing W of the heat exchange tube hole 1 is within the above range. While the spoiler structure 2 can reduce the thermal resistance, the raised spoiler structure will not occupy a large space position, so that there is still a certain space size between adjacent heat exchange fins to ensure the flow space of the fluid outside the tube, and more spoiler structures 2 can be arranged to further enhance the fluid disturbance and reduce the boundary layer thickness.

[0052] In some embodiments, the long axis and / or short axis of the spoiler structure 2 in the present application have a certain angle α with the flow direction of the fluid outside the tube, that is, the spoiler structure 2 of the present application can be that the long axis of all spoiler structures 2 and the flow direction of the fluid outside the tube are at an angle of α; it can also be that the short axis of all spoiler structures 2 and the flow direction of the fluid outside the tube are at an angle of α; it can also be that the long axis of part of the spoiler structure 2 and the flow direction of the fluid outside the tube are at an angle of α, and the short axis of another part of the spoiler structure 2 and the flow direction of the fluid outside the tube are at an angle of α. The orientation of the spoiler structure 2 can be selected according to actual needs, and is not limited here.

[0053] The angle between the long axis of the flow-disturbing structure 2 and the flow direction of the fluid outside the tube is α, 0°<α<90°. Optionally, the angle α can be specifically 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° and 89°, etc., which can be selected according to actual needs, or other values ​​within the range, which are not limited here. It can be understood that the angle between the long axis of the flow-disturbing structure 2 and the flow direction of the fluid outside the tube is within the above range, the inclination angle α is close to the flow trend of the fluid outside the tube, and the flow resistance of the fluid outside the tube is small.

[0054] The technical solution of the present application is described below in conjunction with specific embodiments:

[0055] Example 1

[0056] The spoiler structure of the present application is arranged on the heat exchange fin, wherein the angle between the long axis and / or short axis of the spoiler structure and the flow direction of the fluid outside the tube is 45°, the height L of the spoiler structure is 0.8 mm, the radius D of the arc-shaped connecting part of the spoiler structure is 1.6 mm, and the length B of the arc-shaped main body of the spoiler structure is 4 mm.

[0057] Comparative Example 1

[0058] Different from the first embodiment, no spoiler structure is provided on the heat exchange fins, and the heat exchange fins are flat sheets.

[0059] Comparative Example 2

[0060] Different from the first embodiment, no turbulent structure is provided on the heat exchange fins, and the heat exchange fins are corrugated fins.

[0061] Example 3

[0062] Different from the first embodiment, no turbulent structure is provided on the heat exchange fins, and window fins are used.

[0063] The heat exchange tube bundles are respectively assembled into a first tube-fin heat exchanger, a second tube-fin heat exchanger, a third tube-fin heat exchanger and a fourth tube-fin heat exchanger.

[0064] Test 1: Test the heat transfer performance of the first tube-fin heat exchanger, the second tube-fin heat exchanger, and the third tube-fin heat exchanger under the same air volume.

[0065] Test 2: Comparing the flow resistance performance of the first tube-fin heat exchanger and the fourth tube-fin heat exchanger.

[0066] Test results:

[0067] Table 1

[0068]

[0069]

[0070] Table 2

[0071] Example 1 Comparative Example 3 Headwind speed 2.5 2.5 Pressure Drop 82.532 126.78 Drag coefficient f 0.549 0.844

[0072] Test result analysis:

[0073] First, Example 1 adopts a spoiler structure. When the fluid outside the tube flows through the spoiler structure, compared with the comparative example 3, the boundary layer of the gas in the flow direction is continuously cut by the window fins, resulting in enhanced flow resistance. The design of the spoiler protrusion can increase the turbulence degree of the fluid outside the tube by changing the direction and speed of the flow of the fluid outside the tube, and the placement inclination angle α of the spoiler structure satisfies: 0°<α<90°, which is close to the flow angle of the fluid outside the tube and provides a fixed angle for the fluid outside the tube. The fixed angle will cause the fluid outside the tube to flow along a fixed path on the surface of the heat exchange fins, reduce the uncertainty of the fluid flow, and then reduce the generation of vortices, avoid flow separation, and reduce the flow resistance of the fluid outside the tube to a certain extent.

[0074] Second, the depressions and / or protrusions on the surface of the heat exchange fins form a spoiler structure, and the protrusions increase the heat exchange area of ​​the heat exchange fins, and the heat exchange efficiency is higher than that of flat heat exchange fins.

[0075] Third, compared with flat sheets and corrugated structures, spoiler protrusions can better destroy the boundary layer, thereby improving the heat exchange efficiency and improving the heat exchange performance of the tube-fin heat exchanger under the same air volume.

[0076] The present application also provides a tube-fin heat exchanger, which includes a heat exchange tube bundle and a heat exchange fin of any of the above embodiments. Since the tube-fin heat exchanger adopts the heat exchange fin of any of the above embodiments, it has the same technical effect as the heat exchange fin of any of the above embodiments, which will not be described in detail here.

[0077] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A heat exchange fin, characterized in that: The heat exchange fin is provided with a plurality of heat exchange tube holes, and the heat exchange fin can be used to be connected to the heat exchange tube bundle through the heat exchange tube holes; The heat exchange fin is provided with a plurality of spoiler structures, and along the thickness direction of the heat exchange fin, the spoiler structures are formed by depressions and / or protrusions on the surface of the heat exchange fin; the surface of the spoiler structure is arc-shaped, and the spoiler structure is an axisymmetric structure; wherein the angle between the major axis and / or the minor axis of the spoiler structure and the flow direction of the fluid outside the tube is α, 0°<α<90°.

2. The heat exchange fin according to claim 1, characterized in that: The spoiler structure comprises: An arc-shaped main body portion, wherein the arc-shaped main body portion is projected as a rectangle on the surface of the heat exchange fin; The arc-shaped connecting portion is arranged at both ends of the arc-shaped main portion; the arc-shaped connecting portion is projected as a semicircle on the surface of the heat exchange fin, and the arc-shaped main portion and the arc-shaped connecting portion have the same height.

3. The heat exchange fin according to claim 2, characterized in that: The distance between adjacent heat exchange fins is G, and the height of the spoiler structure is L; The relationship between the fin spacing G between adjacent heat exchange fins and the height L of the spoiler structure satisfies: 0.1G<L<0.9G.

4. The heat exchange fin according to claim 2, characterized in that: Along the width direction of the heat exchange fin, the row spacing of adjacent heat exchange tube holes is P, and the radius of the arc-shaped connecting portion is D; The relationship between the radius D of the arc-shaped connecting portion and the row spacing P of the heat exchange tube holes satisfies: 0.1P<2D<0.25P.

5. The heat exchange fin according to claim 4, characterized in that: Along the length direction of the heat exchange fin, the center distance between adjacent heat exchange tube holes is W, the length of the arc-shaped main body is B, and the length of the spoiler structure is R=2D+B; The relationship between the length R of the spoiler structure and the center distance W of the heat exchange tube holes satisfies: 0.1W<R<0.5W.

6. The heat exchange fin according to any one of claims 1 to 5, characterized in that: The heat exchange fins are stacked.

7. The heat exchange fin according to any one of claims 1 to 5, characterized in that: With the heat exchange tube bundle as the center, the flow disturbance structures on the heat exchange fins are evenly distributed in space.

8. The heat exchange fin according to any one of claims 1 to 5, characterized in that: The spoiler structure is protrudingly arranged on one side of the heat exchange fin.

9. The heat exchange fin according to any one of claims 1 to 5, characterized in that: The shape of the heat exchange tube hole is at least one of a circle, an ellipse or a regular polygon.

10. A tube-fin heat exchanger, characterized in that: The tube-fin heat exchanger comprises a heat exchange tube bundle and the heat exchange fins according to any one of claims 1 to 9.

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