Support structure, fin and heat exchanger

Abstract

The present application discloses a support structure, a fin and a heat exchanger. The support structure includes a support positioning plate arranged on the fin, the support positioning plate and the fin are arranged obliquely, a first positioning portion is arranged at the end of the support positioning plate, and a second positioning portion cooperating with the first positioning portion is arranged on the adjacent fin, so that two adjacent fins are stably connected through the support positioning plate, and the support positioning plate is arranged obliquely with the flow direction of the air, so that the windward surface of the support positioning plate changes the wind direction of the flowing air and flows to the front or rear of the heat exchange tube. This structure can improve the correlation between adjacent fins and improve the support effect; and through the support structure having a certain guiding effect on the flowing air, the air is fully in contact with the heat exchange tube, thereby improving the heat exchange efficiency of the fin.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a support structure. In addition, the present application also relates to a fin including the above structure, and a heat exchanger including the above fin. Background Art

[0002] The gas-cooled heat exchanger uses the outside air to exchange heat with the refrigerant, and is composed of heat exchange tubes and fins. The refrigerant circulates in the heat exchange tubes and exchanges heat with the heat exchange tube walls, while the fins exchange heat with the air. The heat exchange tubes and fins are in contact and connected with each other, thereby achieving heat exchange between the heat exchanger and the outside air.

[0003] However, as the conduction length of the heat exchange tube changes, the cooling effect gradually decreases, and the correlation between adjacent fins is low, the efficiency of heat exchange between the fins and the outside world becomes low, thus affecting the heat exchange efficiency. In addition, during the heat exchange process between the air and the fins, due to the lack of an air guide structure, the air cannot effectively flow to the heat transfer tube, resulting in low heat exchange efficiency.

[0004] Therefore, in view of the above technical problems, how to improve the heat exchange efficiency of the heat exchanger fins is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0005] The purpose of the present application is to provide a support structure, which can improve the correlation between adjacent fins and improve the support effect; and through the wind guiding effect of the support structure, the air is fully in contact with the heat exchange tube, thereby improving the heat exchange efficiency of the fins.

[0006] In addition, another object of the present application is to provide a fin including the above-mentioned supporting structure, and a heat exchanger including the above-mentioned fin, wherein the fin and the heat exchanger also have the purpose of improving the heat exchange efficiency.

[0007] To achieve the above-mentioned purpose, the present application provides a supporting structure, including a supporting positioning plate arranged on the fin, the supporting positioning plate and the fin being inclined, a first positioning portion being arranged at the end of the supporting positioning plate, and a second positioning portion cooperating with the first positioning portion being arranged on the adjacent fin, so that the two adjacent fins are stably connected through the supporting positioning plate, and the supporting positioning plate is inclined to the flow direction of the air, so that the windward surface of the supporting positioning plate changes the wind direction of the flowing air and flows toward the front or rear of the heat exchange tube.

[0008] Preferably, the first positioning portion is a platform parallel to the end face of the fin, a solder layer is provided on the end face of the platform facing the adjacent fin, and the second positioning portion is the end face of the adjacent fin, the platform is attached to the adjacent fin end face and fixed by welding with the solder layer.

[0009] Preferably, the first positioning portion is a protrusion arranged at the end of the supporting positioning plate, and the supporting positioning plates on both sides of the protrusion form a step structure; the second positioning portion is a groove arranged in adjacent fins, and the protrusion extends into the gap between the two grooves, and the step structure extends into the two protrusions so that the two adjacent fins can be stably supported and clamped.

[0010] Preferably, the sheet body of the supporting positioning plate is deformed to form groove-shaped reinforcing ribs, and the reinforcing ribs include vertical reinforcing ribs and corner reinforcing ribs, and the vertical reinforcing ribs and the corner reinforcing ribs are cross-arranged.

[0011] Preferably, holes are opened on the fins, and the fins are cut and bent to form the support positioning plates. The number of the support positioning plates is 2-4 and they are evenly distributed on the periphery of the heat exchange tubes on the fins.

[0012] A fin is provided with a heat exchange tube hole for passing a heat exchange tube, comprising:

[0013] A supporting structure, which is any of the supporting structures described above;

[0014] The flange is bent with the outer circle of the heat exchange tube hole as the bending edge to form a plurality of fan-shaped flanges with an arc, the plurality of flanges are distributed along the circumference of the heat exchange tube hole and are fitted with the outer wall of the heat exchange tube, the inner wall of the flange and the outer wall of the heat exchange tube are both provided with a solder layer, the root of the flange is provided with an inwardly concave platform, and the end of the flange is provided with a bent edge extending into and clamped with the adjacent concave platform;

[0015] A spoiler, located on the fins at the periphery of the heat exchange tube holes;

[0016] Among them, the support positioning plates of the support structure are evenly distributed on the outside of the flange along the circumference of the heat exchange tube hole, and the height of the support positioning plates is higher than the height of the flange, so that two adjacent fins are in contact through the support positioning plates.

[0017] Preferably, the fin is opened and cut, and the cut fin is bent with the outer circle of the heat exchange tube hole as the bending edge to form the flange and the heat exchange tube hole.

[0018] Preferably, the number of the flanges is 3-6 and they are evenly and continuously distributed along the circumference of the heat exchange tube hole, and the diameter of the heat exchange tube hole is 1.8 mm-5.3 mm.

[0019] Preferably, holes are opened and cut on the fins, and the spoilers are bent to form the spoilers, which are in the shape of rectangular wings, bridge windows, shutters, triangular wings, and are evenly distributed on the fins.

[0020] A heat exchanger, comprising:

[0021] The fin is any one of the above fins, each of which is provided with at least one row of heat exchange tube holes in the vertical direction, and the heat exchange tube holes on two adjacent rows of the fins are located at the same horizontal height, or the heat exchange tube holes on two adjacent rows of the fins are staggered;

[0022] The heat exchange tube passes through the heat exchange tube holes of the fins and is used for achieving heat exchange with the fins.

[0023] Compared with the above-mentioned background technology, the present application achieves heat exchange between two adjacent fins by offsetting the supporting positioning plates with adjacent fins, thereby improving the correlation between the fins, reducing the impact of the gradual decrease in cooling effect caused by the change in the conduction length of the heat exchange tube, and improving the stability between adjacent fins; at the same time, the supporting positioning plates are set at a certain angle to the air flow direction, that is, the windward surfaces of the two front supporting positioning plates can change the wind direction of the flowing air, so that the air can be more concentrated in front of the heat exchange tube, and the windward surfaces of the two rear positioning plates can make the air flow to the rear of the heat exchange tube, so that air can circulate around the periphery of the heat exchange tube, thereby improving the heat exchange efficiency.

[0024] Specifically, the support structure includes a support positioning plate arranged on the fin, the support positioning plate and the fin are inclined, a first positioning portion is arranged at the end of the support positioning plate, and a second positioning portion cooperating with the first positioning portion is arranged on the adjacent fin, the first positioning portion and the second positioning portion can cooperate with each other, thereby improving the connection stability and thermal conductivity of two adjacent fins, so that the two adjacent fins are stably connected through the support positioning plate, and a wind guiding effect is formed between the two adjacent fins through the support positioning plate, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the support structure provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the supporting and positioning plate and the spoiler structure provided in the embodiment of the present application;

[0028] Figure 3 Another structural schematic diagram of the support and positioning plate provided in the embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of the heat exchange tube and the solder layer on the flange provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the concave platform and curved edge structure provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the first solder layer arrangement structure of the heat exchange tube and the connecting elbow provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the second solder layer arrangement structure of the heat exchange tube and the connecting elbow provided in the embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of the first distribution mode of heat exchange tube holes provided in the embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the structure of the second distribution mode of heat exchange tube holes provided in the embodiment of the present application;

[0035] Fig.10 This is a schematic diagram of the structure of multiple rows of fins provided in an embodiment of the present application.

[0036] In the figure: 1, fin 2, flange 21, bent edge 22, recess 3, support positioning plate 31, first positioning part 32, vertical reinforcement rib 33, corner reinforcement rib 34, second positioning part 4, spoiler 5, heat exchange tube hole 6, heat exchange tube 7, solder layer 8, connecting elbow. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] like Figure 1 As shown, in this embodiment, a support structure is provided. Specifically, the support structure is arranged on the fin 1, so as to support and fix two adjacent fins 1 and achieve heat conduction and wind guiding effects.

[0041] The support structure includes a support positioning plate 3 arranged on the fin 1, and the support positioning plate 3 is arranged obliquely relative to the fin 1. Of course, there is also a case where the support positioning plate 3 is arranged perpendicular to the fin 1. A first positioning portion 31 is arranged at the end of the support positioning plate 3, and a second positioning portion 34 cooperating with the first positioning portion 31 is arranged on the adjacent fin 1, so that two adjacent fins 1 are stably connected or abutted by the support positioning plate 3; and under the support of the support positioning plate 3, a wind guiding effect can be formed between the two fins 1, thereby increasing the ability of air to flow toward the heat transfer pipe, thereby improving the heat exchange efficiency between the fin 1 and the air.

[0042] It should be pointed out that the support positioning plate 3 can be fixedly connected to the fin 1 using a separate plate, or holes can be opened and cut on the fin 1 so that the support positioning plate 3 and the fin 1 form an integrated structure to avoid the thermal resistance effect caused by additional connection parts.

[0043] In addition, since the support positioning plate 3 of the present application is inclined to the fin 1, a certain angle is formed, and the end of the support positioning plate 3 can contact the adjacent fin 1, so that heat exchange with the adjacent fin 1 is achieved through the performance of the support positioning plate 3 itself, thereby overcoming the problem of reduced cooling effect caused by changes in the conduction length of the heat exchange tube 6.

[0044] In other words, since there is no correlation between the existing fins 1, and as the conduction length of the heat exchange tube 6 changes, the heat exchange efficiency will gradually decrease, and the heat exchange efficiency between the fins 1 will also be different; that is, the heat exchange efficiency of the fin 1 at the initial end of the heat exchange tube 6 is high, and as the conduction length of the heat exchange tube 6 changes, there is a certain loss of the internal cooling medium, so the heat exchange efficiency of the fin 1 at its position will naturally decrease. However, the present application ensures or tries to make each fin 1 have a certain correlation through heat exchange between adjacent fins 1, thereby ensuring the heat exchange efficiency of each fin 1, so as to achieve the effect of improving the heat exchange efficiency of the overall fin 1.

[0045] In summary of the above embodiments, the present application achieves heat exchange between two adjacent fins 1 by offsetting the supporting positioning plates 3 with adjacent fins 1, thereby improving the correlation between the fins 1, reducing the impact of the gradual decrease in cooling effect caused by the change in the conduction length of the heat exchange tube 6, and improving the stability between adjacent fins 1; at the same time, the supporting positioning plates 3 are set at a certain angle to the air flow direction, that is, the windward surfaces of the two front supporting positioning plates 3 can change the wind direction of the flowing air, so that the air can be more concentrated in front of the heat exchange tube 6, and the windward surfaces of the two rear positioning plates can make the air flow to the rear of the heat exchange tube 6, so that air can circulate around the periphery of the heat exchange tube 6, thereby improving the heat exchange efficiency.

[0046] Please refer to Figure 2 The first positioning portion 31 is a platform parallel to the end face of the fin 1, and a solder layer 7 is provided on the end face of the platform facing the adjacent fin 1. The second positioning portion 34 is the end face of the adjacent fin 1. The platform is attached to the end face of the adjacent fin 1 and is welded and fixed by the solder layer 7, thereby improving the connection stability of the two adjacent fins 1, making the connection between the flange 2 and the heat exchange tube 6 more uniform, further improving the heat exchange performance, and maximizing the performance of heat conduction of the adjacent fins 1 through the supporting positioning plate 3.

[0047] The root of the flange 2 is provided with an inwardly concave platform 22, and the end of the flange 2 is provided with a curved edge 21 extending into and engaging with the adjacent concave platform 22. Figure 5 The end of the flange 2 is provided with a bent edge 21 bent outward, and a recessed platform 22 is provided at its root (where it intersects with the fin 1). When two adjacent fins 1 are installed, the bent edge 21 on one fin 1 can be snapped into the recessed platform 22 on the other fin 1 without a supporting positioning plate 3, thereby improving the thermal conductivity and stability of both.

[0048] It should be noted that, for the above solder layer 7, please refer to Figure 4 The solder layer 7 is arranged on the outer wall of the heat exchange tube 6, the fin 1, and the flange 2, and the solder layer 7 is at least located on the inner wall of the flange 2 and / or the outer wall of the heat exchange tube 6, that is, the solder layer 7 can be arranged only on the inner wall of the flange 2, or only on the outer wall of the heat exchange tube 6, or on both, so as to ensure that the two can be connected through the solder layer 7, improve the degree of combination of the two, and improve the heat exchange performance. Of course, the solder layer 7 can also be arranged on both end surfaces of the fin 1.

[0049] In addition, the solder layer 7 may also be provided on the connecting elbow 8 between the heat exchange tube 6 and its end, see Figure 6 When both ends of the connecting elbow 8 are embedded in the heat exchange tube 6, a solder layer 7 can be provided on the inner wall of the end of the heat exchange tube 6 and the outer wall of the connecting elbow 8 to facilitate the connection between the two, improve the uniformity of the connection between the two, and ensure the sealing effect. Figure 7 If the end of the heat exchange tube 6 is embedded in the connecting elbow 8, a solder layer 7 can be provided on the outer wall of the heat exchange tube 6 and the inner wall of the connecting elbow 8, so as to achieve the purpose of improving the sealing effect.

[0050] The above-mentioned first positioning portion 31 and second positioning portion 34 may also be replaced by other forms. For example, the first positioning portion 31 may be a protrusion, an angled shape, a micro-folded edge, a groove, etc., and the corresponding second positioning portion 34 may be a groove, an angled shape, a micro-folded edge, a protrusion, etc., to ensure that the first positioning portion 31 can complement the second positioning portion 34, thereby achieving the clamping effect of the first positioning portion 31 and the second positioning portion 34.

[0051] Then the present application is introduced by taking the protrusion and the groove as an example, that is, the first positioning portion 31 is a protrusion, and the second positioning portion 34 is a groove. Figure 3 The end of the first positioning portion 31 is raised, and the support positioning plate 3 on both sides of the raised portion forms a step structure, the raised portion extends into the gap between the two grooves, and the step structure extends into the two grooves, thereby ensuring that the adjacent fins 1 are stably supported and clamped. Of course, a solder layer 7 can also be provided in the raised portion and the recessed portion, thereby further improving the connection effect of the support positioning plate 3 and improving the thermal conductivity of the support positioning plate 3, that is, reducing the thermal resistance at the connection between the support positioning plate 3 and the fin 1.

[0052] Based on the above embodiment, the present application adopts a technical solution of opening holes and cutting on the fin 1, and bending to form a support positioning plate 3. The number of the support positioning plates 3 is two to four, and they are evenly distributed on the outside of the flange 2 along the circumference of the heat exchange tube hole 5. In order to improve the stability of the support positioning plate 3, the sheet body of the support positioning plate 3 can be bent and deformed to form a groove-shaped reinforcing rib, please refer to Figure 3 ; The reinforcement ribs include vertical reinforcement ribs 32 and corner reinforcement ribs 33, and the specific technical solutions for deformation will not be described here one by one, and reference may be made to the prior art. On this basis, the deformed support positioning plate 3 can, on the one hand, increase its own heat transfer area and improve the heat exchange efficiency; on the other hand, it can improve the support strength of the support positioning plate 3 to ensure stable contact with the other fin 1. Similarly, the effect of the corner reinforcement rib 33 is the same as that of the vertical reinforcement rib 32, which can improve the heat exchange efficiency and support strength at the bend. At the same time, the vertical reinforcement rib 32 and the corner reinforcement rib 33 are cross-arranged, so as to be used together to improve the heat exchange efficiency and support strength of the support positioning plate 3.

[0053] In addition, the present application also provides a fin 1, which is provided with a heat exchange tube hole 5 for passing the heat exchange tube 6. The fin 1 includes a supporting structure, a flange 2 and a spoiler 4, and the supporting structure is any one of the above-mentioned supporting structures; and the flange 2 is opened and cut by the fin 1, that is, the center of the heat exchange tube hole 5 is opened and cut, so that the outer diameter of the heat exchange tube hole 5 is bent as the bending edge, forming a plurality of fan-shaped flanges 2 with a certain curvature, and at the same time forming a heat exchange tube hole 5 of a certain diameter.

[0054] Please refer to Figure 1 , multiple flanges 2 are bent according to the diameter of the heat exchange tube hole 5, so multiple flanges 2 are distributed circumferentially along the heat exchange tube hole 5, and can fit with the outer wall of the heat exchange tube 6 at the same time, and the inner wall of the flange 2 and the outer wall of the heat exchange tube 6 are both provided with a solder layer 7, and the solder layer 7 improves the degree of bonding between the two, so that the connection between the flange 2 and the heat exchange tube 6 is more uniform, and the heat exchange performance is further improved; the present application directly bends the flange 2 on the fin 1, which generates less waste, and the contact area between the flange 2 and the heat exchange tube 6 is large, and the heat exchange efficiency is high.

[0055] On this basis, the support positioning plates 3 in the support structure are evenly distributed on the outside of the flange 2 along the circumference of the heat exchange tube hole 5, and the height of the support positioning plates 3 is higher than the height of the flange 2, so that two adjacent fins 1 are in contact through the support positioning plates 3.

[0056] The spoiler 4 is also provided on the fin 1, that is, the fin 1 is bent to a certain extent by opening and cutting. The spoiler 4 is located on the fin 1 at the periphery of the heat exchange tube hole 5. In order to further increase the residence time of the air on the fin 1, a hole can be opened and cut on the fin 1, and the fin 1 can be bent to form the spoiler 4. Please refer to Figure 1 and Figure 2 The spoiler 4 is in the shape of a rectangular wing, a bridge window, a shutter, or a triangular wing, and is evenly distributed on the fin 1, thereby improving the spoiler effect.

[0057] As for the above-mentioned rectangular wings, bridge windows, louvers, and triangular wings, the rectangular wings and triangular wings are rectangular spoilers of rectangular and triangular structures, while the bridge type is an arched bridge structure, thereby increasing the contact area between the air and the fin 1, and increasing the residence time of the air in the fin 1. Similarly, the louvers can refer to the existing louver structure, which can also increase the contact area between the air and the fin 1 and increase the residence time of the air in the fin 1. It should be noted that the technical solutions for increasing the contact area between the air and the fin 1 all fall within the protection scope of this application and will not be described in detail here.

[0058] As for the specific arrangement of the flanges 2, three to six flanges 2 can be provided, and the flanges 2 can be continuously distributed along the circumference of the heat exchange tube hole 5, so as to form a circular heat exchange tube hole 5. Preferably, the diameter of the heat exchange tube hole 5 is 1.8 mm-5.3 mm, so as to adapt to the setting conditions of the microtube heat exchanger.

[0059] As for micro-tube heat exchangers, the economic and social benefits brought by the refinement of the tube diameter to 5mm are already very significant. If the tube diameter is further reduced to 2-4mm and below, the cost and volume advantages will be further expanded, and the industry competitiveness of tube-fin heat exchangers will become more prominent. However, from the perspective of theoretical research, from 5mm to 4mm, there seems to be only a slight difference of 1mm, but it belongs to two completely different categories of traditional pipes and small pipes. A large number of studies at home and abroad have confirmed that the hydraulic diameter (tube inner diameter) of 3mm is the dividing point between traditional pipes and small pipe diameters. Therefore, from the academic classification definition, 5mm still belongs to traditional large pipes, while the outer diameter ≤4mm belongs to small pipe diameters. There are obvious differences in the boiling heat transfer characteristics of the two. This requires that the structural design and simulation of 4mm tube-fin heat exchangers first need to establish a corresponding theoretical model to ensure the design accuracy of small pipe diameter heat exchangers.

[0060] However, the tube diameter refinement of the tube-fin structure is not without limit. A large number of studies have shown that when the outer diameter of the copper tube is reduced to 2mm or less, due to the limitations of existing household appliance standards, the flow path design and confluence structure will inevitably become more and more complicated, resulting in an exponential increase in material costs and processing difficulties, and commercial promotion will be completely lost. Based on the above analysis, considering the commercial promotion (cost), the necessity of theoretical research, and manufacturability, the outer diameter of 3-4mm is very likely to be the limit of the tube-fin heat exchanger. Therefore, based on the above embodiment, the diameter of the heat exchange tube hole 5 that can be achieved in theory is used as an example for limitation. Of course, with the development of science and technology, there may be technical solutions beyond the above range, and no excessive restrictions will be made here.

[0061] In addition, the present application also provides a heat exchanger, which includes a fin 1, a heat exchange tube 6 and a header, the fin 1 is any of the fins 1 described above, the heat exchanger includes a plurality of fins 1, each fin 1 is provided with at least one row of heat exchange tube holes 5 in the vertical direction, and the heat exchange tube holes 5 on two adjacent rows of fins 1 are located at the same horizontal height, please refer to Figure 8 or the heat exchange tube holes 5 on two adjacent rows of fins 1 are arranged in a staggered manner, please refer to Fig. 9 ; When there are multiple rows of fins 1, please refer to Fig.10 The heat exchange tube 6 passes through the heat exchange tube hole 5 of the fin 1 to achieve heat exchange with the fin 1; and the header is used to receive the cooling medium of the heat exchange tube 6, so as to achieve circulation flow between the multiple heat exchange tubes 6. Of course, the heat exchanger also includes other necessary components, or components with equivalent effects or functions, which will not be repeated here, please refer to the prior art.

[0062] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0063] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A support structure, characterized in that: The invention comprises a support positioning plate (3) arranged on a fin (1), the support positioning plate (3) being arranged at an angle with the fin (1), a first positioning portion (31) being arranged at the end of the support positioning plate (3), and a second positioning portion (34) cooperating with the first positioning portion (31) being arranged on the adjacent fin (1), so that two adjacent fins (1) are stably connected via the support positioning plate (3), and the support positioning plate (3) is arranged at an angle with respect to the flow direction of air, so that the windward surface of the support positioning plate (3) changes the wind direction of the flowing air and causes the air to flow in front of or behind the heat exchange tube (6).

2. The support structure according to claim 1, characterized in that: The first positioning portion (31) is a platform parallel to the end surface of the fin (1), and a solder layer (7) is provided on the end surface of the platform facing the adjacent fin (1). The second positioning portion (34) is the end surface of the adjacent fin (1), and the platform is attached to the end surface of the adjacent fin (1) and is fixed by welding through the solder layer (7).

3. The support structure according to claim 1, characterized in that: The first positioning portion (31) is a protrusion arranged at the end of the support positioning plate (3), and the support positioning plate (3) on both sides of the protrusion forms a step structure. The second positioning portion (34) is a groove arranged in adjacent fins (1), and the protrusion extends into the gap between the two grooves. The step structure extends into the two protrusions, so that the two adjacent fins (1) are stably abutted and clamped.

4. The support structure according to claim 2 or 3, characterized in that: The sheet body of the support positioning plate (3) is deformed to form groove-shaped reinforcing ribs, the reinforcing ribs comprising vertical reinforcing ribs (32) and corner reinforcing ribs (33), the vertical reinforcing ribs (32) and the corner reinforcing ribs (33) being arranged crosswise.

5. The support structure according to claim 4, characterized in that: Holes are opened on the fins (1), cut, and bent to form the support positioning plates (3); the number of the support positioning plates (3) is 2-4 and they are evenly distributed on the periphery of the heat exchange tubes (6) on the fins (1).

6. A fin, provided with a heat exchange tube hole (5) for passing a heat exchange tube (6), characterized in that: include: A supporting structure, which is the supporting structure according to any one of claims 1 to 5; The flange (2) is bent with the outer circle of the heat exchange tube hole (5) as the bending edge to form a plurality of fan-shaped flanges (2) with an arc, the plurality of flanges (2) are distributed along the circumference of the heat exchange tube hole (5) and are in contact with the outer wall of the heat exchange tube, the inner wall of the flange (2) and the outer wall of the heat exchange tube are both provided with a solder layer (7), the root of the flange (2) is provided with an inwardly recessed concave platform (22), and the end of the flange (2) is provided with a bent edge (21) that extends into and is clamped with an adjacent concave platform (22); A spoiler (4) is located on the fin (1) at the periphery of the heat exchange tube hole (5); The support positioning plates (3) of the support structure are evenly distributed on the outside of the flange (2) along the circumference of the heat exchange tube hole (5), and the height of the support positioning plates (3) is higher than the height of the flange (2), so that two adjacent fins (1) are in contact with each other through the support positioning plates (3).

7. The fin according to claim 6, characterized in that: The fin (1) is opened and cut, and the cut fin (1) is bent with the outer circle of the heat exchange tube hole (5) as the bending edge to form the flange (2) and the heat exchange tube hole (5).

8. The fin according to claim 6, characterized in that: The number of the flanges (2) is 3-6 and they are evenly and continuously distributed along the circumference of the heat exchange tube hole (5); the diameter of the heat exchange tube hole (5) is 1.8 mm-5.3 mm.

9. The fin according to claim 6, characterized in that: The fin (1) is opened with a hole, cut, and bent to form the spoiler (4); the spoiler (4) is in the shape of a rectangular wing, a bridge window, a shutter, or a triangular wing, and is evenly distributed on the fin (1).

10. A heat exchanger, characterized in that: include: The fin (1) is a fin according to any one of claims 6 to 9, each of the fins (1) being provided with at least one row of heat exchange tube holes (5) in the vertical direction, the heat exchange tube holes (5) on two adjacent rows of the fins (1) being located at the same horizontal height, or the heat exchange tube holes (5) on two adjacent rows of the fins (1) being arranged in a staggered manner; A heat exchange tube (6) passes through the heat exchange tube hole (5) of the fin (1) and is used to achieve heat exchange with the fin (1).

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