Fin structure, heat exchanger and air conditioning equipment

Abstract

The utility model discloses a fin structure, heat exchanger and air conditioning equipment, and relates to the technical field of heat exchange, the fin structure comprises a fin main body, the fin main body is provided with a first side and a second side in a first direction, the fin main body is hollow, at least one bridge piece group is arranged on the fin main body, the bridge piece set comprises a plurality of bridge pieces arranged corresponding to the hollowed-out areas of the fin body, the main body part of each bridge piece and the fin body are arranged in a staggered mode in the first direction, and therefore a plurality of heat exchange gaps are formed between the main body part of each bridge piece and the fin body. In one bridge piece set, the multiple bridge pieces comprise at least two first bridge pieces located on the first side of the fin body, the body parts of the at least two first bridge pieces are arranged in a staggered mode in the first direction, and when fluid flows through the fin body, the at least two first bridge pieces are arranged in a staggered mode to break the smooth path and the laminar flow state of fluid flowing. The turbulence degree and heat exchange disturbance are increased, so that the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, and particularly relates to a fin structure, a heat exchanger and an air conditioning device. Background Art

[0002] When the heat exchanger works, in order to improve the heat exchange efficiency, a fin structure is designed to improve the heat exchange performance. Generally, the fins include louver fins and bridge fins, both of which improve the heat exchange performance by increasing the complexity of fluid flow. However, the existing bridge fin structure still has insufficient heat exchange capacity. Therefore, there is still room for improvement in how to further improve the heat exchange capacity of the heat exchanger. Summary of the Utility Model

[0003] The main object of the utility model is to provide a fin structure, a heat exchanger and an air conditioning device, aiming to further improve the heat exchange capacity of the existing heat exchanger.

[0004] To achieve the above object, the fin structure proposed by the utility model includes a fin body. The fin body has a first side and a second side in a first direction. The fin body is provided with a hollow structure. At least one bridge fin group is arranged on the fin body. The bridge fin group includes a plurality of bridge fins corresponding to the hollow area of the fin body. The main body parts of the bridge fins are arranged in a staggered manner with the fin body in the first direction, so as to form a plurality of heat exchange gaps between the main body parts of the bridge fins and the fin body.

[0005] In one bridge fin group, the plurality of bridge fins include at least two first bridge fins located on the first side of the fin body, and the main body parts of at least the two first bridge fins are arranged in a staggered manner in the first direction.

[0006] In one embodiment, in one bridge fin group, the plurality of bridge fins respectively extend along a second direction and are arranged at intervals in a third direction in turn.

[0007] In one embodiment, in the bridge fin group, the number of the first bridge fins is set to at least three;

[0008] Among the three first bridge fins, the heat exchange gaps formed between the first bridge fins on both sides and the fin body are first heat exchange gaps, and the heat exchange gap formed between the first bridge fin in the middle and the fin body is a second heat exchange gap. The first heat exchange gap is smaller than the second heat exchange gap.

[0009] In one embodiment, the fin structure includes a plurality of fin bodies arranged at intervals in the first direction. The distance between two adjacent fin bodies is W, and the thickness of the fin body is t;

[0010] The first heat exchange gap is h1, and the second heat exchange gap is h2, where 2t ≤ h1 ≤ (W - t) / 2, and (W - t) / 2 ≤ h2 ≤ W - t.

[0011] In one embodiment, in the bridge plate group, the plurality of bridge plates further includes a second bridge plate disposed on the second side of the fin body.

[0012] In one embodiment, the fin structure includes a plurality of fin bodies spaced apart in the first direction, the distance between two adjacent fin bodies is W, and the thickness of the fin body is t;

[0013] The third heat exchange gap formed between the second bridge plate and the fin body is h3, where t ≤ h3 ≤ W - t.

[0014] In one embodiment, in the bridge plate group, on the first side of the fin body in the regions corresponding to both sides of the second bridge plate, a plurality of the first bridge plates are respectively provided.

[0015] In one embodiment, in the bridge plate group, the distance between every two adjacent first bridge plates disposed on the first side of the fin body in the third direction is S, where 0.5 mm ≤ S ≤ 2 mm; and / or,

[0016] The width of each bridge plate in the third direction is S, where 0.5 mm ≤ S ≤ 2 mm.

[0017] In one embodiment, an installation hole for a heat exchange tube to pass through is further provided on the fin body adjacent to the bridge plate group;

[0018] In the bridge plate group, the plurality of bridge plates are located on one side of the installation hole in the second direction, each bridge plate has a side end portion close to the installation hole, and the side end portions of the plurality of bridge plates extend along the circumferential direction of the installation hole.

[0019] In one embodiment, a plurality of the side end portions are on an ellipse with the center of adjacent installation holes as the geometric center.

[0020] In one embodiment, the minimum aperture of the installation hole is D1;

[0021] The ellipse has a major axis in the third direction and a minor axis in the second direction. The major axis is LD, the minor axis is SD, and the distance between two adjacent installation holes in the second direction is L, where 1.5D1 ≤ LD ≤ 3D1, and 1.5D1 ≤ SD ≤ L / 2.

[0022] In one embodiment, in the bridge plate group, the number of the plurality of bridge plates is n, where 3 ≤ n ≤ 9.

[0023] The present utility model further provides a heat exchanger, which includes a fin structure. The fin structure includes a fin body having a first side and a second side in a first direction. The fin body is provided with a hollow structure. At least one bridge plate group is arranged on the fin body. The bridge plate group includes a plurality of bridge plates corresponding to the hollow area of the fin body. The main body parts of the bridge plates are arranged staggeredly with the fin body in the first direction so as to form a plurality of heat exchange gaps between the main body parts of the bridge plates and the fin body.

[0024] In one bridge plate group, the plurality of bridge plates include at least two first bridge plates located on the first side of the fin body, and the main body parts of at least the two first bridge plates are arranged staggeredly in the first direction.

[0025] The present utility model further provides an air conditioning device, which includes a heat exchanger. The heat exchanger includes a fin structure. The fin structure includes a fin body having a first side and a second side in a first direction. The fin body is provided with a hollow structure. At least one bridge plate group is arranged on the fin body. The bridge plate group includes a plurality of bridge plates corresponding to the hollow area of the fin body. The main body parts of the bridge plates are arranged staggeredly with the fin body in the first direction so as to form a plurality of heat exchange gaps between the main body parts of the bridge plates and the fin body.

[0026] In one bridge plate group, the plurality of bridge plates include at least two first bridge plates located on the first side of the fin body, and the main body parts of at least the two first bridge plates are arranged staggeredly in the first direction.

[0027] In the technical solution of the present utility model, at least one bridge plate group is arranged on the fin body. The bridge plate group includes a plurality of bridge plates corresponding to the hollow area of the fin body. The main body parts of the bridge plates are arranged staggeredly with the fin body in the first direction so as to form a plurality of heat exchange gaps between the main body parts of the bridge plates and the fin body. In one bridge plate group, the plurality of bridge plates include at least two first bridge plates located on the first side of the fin body. By arranging the main body parts of at least the two first bridge plates staggeredly in the first direction, when a fluid (gas or liquid) flows through the fin body, the at least two first bridge plates are arranged in a staggered manner to break the smooth path and laminar state of the fluid flow, increase the degree of turbulence and heat exchange disturbance, thereby improving the heat exchange efficiency. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0029] Figure 1 Partial structural schematic diagram of an embodiment of the fin structure provided by the present invention;

[0030] Figure 2 For Figure 1 Stereoscopic schematic diagram of the first side of the fin body in

[0031] Figure 3 For Figure 1 Stereoscopic schematic diagram of the second side of the fin body in

[0032] Figure 4 For Figure 1 Planar schematic diagram of the fin structure in

[0033] Figure 5 For Figure 4 Cross-sectional schematic diagram of A-A in

[0034] Figure 6 For Figure 5 Partial dimension schematic diagram of the fin structure in

[0035] Explanation of the reference numerals in the drawings:

[0036] 100, fin structure; 1, fin body; 11, first side; 12, second side; a, mounting hole; 2, bridge plate group; 21, first bridge plate; 22, second bridge plate; 20, side end; b, ellipse.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0041] When the heat exchanger is working, in order to improve the heat exchange efficiency, a fin structure will be designed to improve the heat exchange performance. Generally, the fins are of the louver type and the bridge type, both of which improve the heat exchange performance by increasing the complexity of fluid flow. The bridges of the existing bridge-type fins are arranged in parallel, and the fluid will flow along a relatively smooth path, with weak heat exchange disturbance ability and insufficient heat exchange capacity.

[0042] The present utility model proposes a fin structure, aiming to further improve the heat exchange capacity of the existing heat exchanger.

[0043] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the fin structure 100 includes a fin body 1. The fin body 1 has a first side 11 and a second side 12 in a first direction. The fin body 1 is provided with a hollow structure. At least one bridge group 2 is arranged on the fin body 1. The bridge group 2 includes a plurality of bridges corresponding to the hollow area of the fin body 1. The main body parts of the bridges are arranged offset in the first direction with respect to the fin body 1, so as to form a plurality of heat exchange gaps between the main body parts of the bridges and the fin body 1. In one bridge group 2, the plurality of bridges include at least two first bridges 21 located on the first side 11 of the fin body 1, and the main body parts of at least the two first bridges 21 are arranged offset in the first direction.

[0044] It should be noted that the first direction can be understood as the thickness direction of the fin body 1. The first side 11 and the second side 12 refer to two relatively arranged sides in the first direction.

[0045] The fin body 1 is provided with a hollow structure: there are openings on the fin body 1 to increase the flow path of the fluid, thereby improving the heat exchange efficiency.

[0046] The positions of the bridge plates are staggered with respect to the fin body 1 in the first direction. Therefore, a certain distance is formed between the bridge plates and the fin body 1 to form a heat exchange gap, which is convenient for fluid flow.

[0047] At least the main parts of the two first bridge plates 21 are staggered in the first direction. The positions of at least the main parts of the two first bridge plates 21 in the first direction are staggered rather than aligned. When the fluid flows, after flowing through one of the first bridge plates 21, the fluid there is blocked and makes it flow continuously along the two sides of the first bridge plate 21 in the first direction. Then, when passing through the other first bridge plate 21, the diverted fluid is continuously blocked by the first bridge plate 21 at this place, and after being separated again, it continues to flow.

[0048] It can be understood that when the fluid flows along the first side 11 or the second side 12 of the fin body 1, each bridge plate increases the complexity of the fluid flow, which can increase the degree of turbulence in the fluid flow, thereby improving the heat exchange performance. At least the two first bridge plates 21 whose positions are staggered in the first direction can further increase the complexity of the fluid flow, prevent the fluid from flowing along a relatively smooth path, and thus further increase the heat exchange disturbance ability.

[0049] It should be noted that every two adjacent bridge plates among the multiple bridge plates can be arranged in parallel with each other, or can be arranged at an angle, and of course, they can also be partially arranged in parallel and partially arranged at an angle.

[0050] In the technical solution of the present utility model, at least one bridge piece group 2 is provided on the fin body 1. The bridge piece group 2 includes a plurality of bridge pieces correspondingly arranged in the hollow area of the fin body 1. The main body parts of the bridge pieces are arranged staggeredly with the fin body 1 in the first direction, so as to form a plurality of heat exchange gaps between the main body parts of the bridge pieces and the fin body 1. In one bridge piece group 2, the plurality of bridge pieces include at least two first bridge pieces 21 located on the first side 11 of the fin body 1. By arranging the main body parts of at least the two first bridge pieces 21 staggeredly in the first direction, when a fluid (gas or liquid) flows through the fin body 1, at least the two first bridge pieces 21 are arranged in a staggered manner to break the smooth path and laminar state of the fluid flow, increase the degree of turbulence and heat exchange disturbance, thereby improving the heat exchange efficiency.

[0051] Further, please refer to Figures 2 to 4 , in this embodiment, in one bridge piece group 2, the plurality of bridge pieces extend along the second direction and are arranged at intervals in the third direction in turn.

[0052] The second direction is defined as a direction different from the first direction and is usually perpendicular to the first direction. For example, if the first direction is the depth direction, the second direction is the horizontal direction.

[0053] The third direction is defined as another direction perpendicular to the first direction and the second direction. For example, if the first direction is the depth direction and the second direction is the horizontal direction, the third direction is the vertical direction.

[0054] For the fin body 1, the first direction can be understood as the thickness direction of the fin body 1, the second direction can be understood as the width direction of the fin body 1, and the third direction can be understood as the height direction of the fin body 1.

[0055] The design of extending the plurality of bridge pieces along the second direction and arranging them at intervals in the third direction enables the bridge pieces to be mass-produced using standard sizes, with better manufacturability and reduced manufacturing costs.

[0056] Specifically, in one embodiment, in the bridge piece group 2, the first bridge piece 21 is provided with at least three; among the three first bridge pieces 21, the heat exchange gaps formed between the first bridge pieces 21 on both sides and the fin body 1 are first heat exchange gaps, and the heat exchange gap formed between the first bridge piece 21 in the middle and the fin body 1 is a second heat exchange gap, and the first heat exchange gap is smaller than the second heat exchange gap.

[0057] It can be understood that the second heat exchange gap is relatively large, which increases the flow path of the fluid, making it easier for the fluid to form eddies when flowing in the middle region, thereby increasing the degree of turbulence and improving the heat exchange efficiency.

[0058] The first heat exchange gap is relatively small, which can cause the fluid to be subject to greater resistance when flowing in the two side regions, thereby prompting the fluid to flow more to the middle region and ensuring a more uniform fluid distribution.

[0059] By setting different heat exchange gaps, different fluid flow characteristics can be formed in different regions, thereby improving the heat exchange efficiency of the heat exchanger as a whole.

[0060] Specifically, in this embodiment, in the bridge plate group 2, the number of the multiple bridge plates is n, where 3 ≤ n ≤ 9. It can be understood that the first bridge plate 21 can also be set to five, or seven, etc. The first bridge plate 21 located in the middle can be set to have the largest distance from the fin body 1, so that the heat exchange gap is the largest. The two first bridge plates 21 adjacent to both sides of the first bridge plate 21 in the middle can be set to have a distance from the fin body 1 that is slightly smaller than the distance between the first bridge plate 21 in the middle and the fin body 1; in the outward direction towards both sides, the distance between the two outermost first bridge plates 21 and the fin body 1 is even smaller than the distance between the first bridge plate 21 in the middle and the fin body 1, and so on, so that the main body parts of the multiple bridge plates can be gradually close to the fin body 1 in a stepped form from the middle to both sides, thereby further increasing the degree of turbulence.

[0061] Specifically, please refer to Figure 5 and Figure 6 , in this embodiment, the fin structure 100 includes a plurality of fin bodies 1 arranged at intervals in the first direction. The distance between two adjacent fin bodies 1 is W, and the thickness of the fin body 1 is t; the first heat exchange gap is h1, and the second heat exchange gap is h2, where 2t ≤ h1 ≤ (W - t) / 2, and (W - t) / 2 ≤ h2 ≤ W - t.

[0062] The minimum value of the first heat exchange gap h1 is 2t. The first heat exchange gap should be at least the sum of the thicknesses of two fin bodies 1, that is, 2t. The maximum value of the first heat exchange gap h1 is (W - t) / 2. The maximum value of the first heat exchange gap does not exceed half of the distance W between adjacent fin bodies 1 minus the thickness t of one fin body 1, that is, (W - t) / 2.

[0063] The minimum value of the second heat exchange gap h2 is (W - t) / 2. The second heat exchange gap should be at least half of the distance W between adjacent fin bodies 1 minus the thickness t of one fin body 1, that is, (W - t) / 2. The maximum value of the second heat exchange gap h2 is W - t. The maximum value of the second heat exchange gap should not exceed the remaining part of the distance W between adjacent fin bodies 1 minus the thickness t of one fin body 1, that is, W - t.

[0064] By setting the size limits of the first heat exchange gap and the second heat exchange gap, it can be ensured that there is enough space between two adjacent fin bodies 1 to arrange the bridge pieces, thereby avoiding interference between the bridge pieces. The second heat exchange gap is relatively large, which can ensure that there is enough space for the bridge pieces to be arranged in the middle and avoid interference with the adjacent fin bodies 1. The first heat exchange gap is relatively small, which can ensure that the first bridge piece 21 arranged on both sides will not interfere with the adjacent fin bodies 1, and at the same time can be fully staggered with the fin bodies 1 and the first bridge piece 21 located in the middle in the first direction, which can increase the heat exchange disturbance while ensuring the fluidity of the fluid.

[0065] Further, please refer Figure 3 to FIGS. 5 and Figure 6 In this embodiment, in the bridge piece group 2, the plurality of bridge pieces further include second bridge pieces 22 provided on the second side 12 of the fin body 1.

[0066] Arranging bridge pieces on both sides of the fin body 1 can increase the complexity of fluid flow, causing more turbulence when the fluid passes through the fin body 1. It can ensure that there are enough paths and space for the fluid to flow on both sides of the fin body 1, avoiding overheating or overcooling on one side, ensuring more uniform fluid distribution, and at the same time can increase the total heat exchange area, thereby further improving the heat exchange efficiency.

[0067] By arranging bridge pieces on both sides of the fin body 1 to further enhance the heat exchange effect, ensure the uniformity and complexity of fluid flow, enhance the structural stability of the fin body 1, and also avoid the asymmetric stress distribution that may be caused by arranging bridge pieces on one side only.

[0068] Further, please refer to Figure 5 and Figure 6 In this embodiment, the fin structure 100 includes a plurality of fin bodies 1 arranged at intervals in the first direction. The distance between two adjacent fin bodies 1 is W, and the thickness of the fin body 1 is t. The third heat exchange gap formed between the second bridge piece 22 and the fin body 1 is h3, where t ≤ h3 ≤ W - t.

[0069] It is understandable that the minimum value t ensures that the third heat exchange gap is at least the thickness of one fin body 1, which can ensure the smooth passage of the fluid through the second heat exchange gap and avoid the situation that when air or other fluids pass through the third heat exchange gap, they will encounter greater resistance, resulting in a slowdown in the fluid flow velocity and even the possibility that the fluid is difficult to pass through.

[0070] The maximum value W - t ensures that the third heat exchange gap does not exceed the remaining space between adjacent fin bodies 1, thereby avoiding interference between the second bridge piece 22 and the adjacent fin body 1.

[0071] By reasonably setting the size of the third heat exchange gap h3 to ensure a reasonable flow space, when arranging the bridge pieces on both sides, it can ensure that sufficient turbulence is formed when the fluid passes through the fin body 1, thereby improving the heat exchange efficiency.

[0072] Furthermore, in this embodiment, on the first side 11 of the fin body 1, in the regions corresponding to both sides of the second bridge piece 22, a plurality of the first bridge pieces 21 are respectively arranged.

[0073] Arranging more of the plurality of first bridge pieces 21 on the first side 11 can increase the complexity of the fluid flow, form more turbulence, and also increase the contact area between the fluid and the fin body 1, thereby improving the heat exchange efficiency and enhancing the structural stability of the fin body 1 to avoid asymmetric stress distribution caused by arranging bridge pieces on one side only.

[0074] In this embodiment, in the bridge piece group 2, for every two adjacent first bridge pieces 21 arranged on the first side 11 of the fin body 1, the spacing in the third direction is S, where 0.5 mm ≤ S ≤ 2 mm; and / or, the width of each bridge piece in the third direction is S, where 0.5 mm ≤ S ≤ 2 mm.

[0075] It should be noted that the spacing S in the third direction between every two adjacent first bridge pieces 21 arranged on the first side 11 of the fin body 1 refers to the distance between the connecting lines of the respective geometric centers of every two adjacent first bridge pieces 21 arranged on the first side 11 of the fin body 1, rather than the distance between the mutually approaching edges of two adjacent first bridge pieces 21.

[0076] Setting the spacing in the third direction between every two adjacent first bridge pieces 21 within the range of greater than or equal to 0.5 mm and less than or equal to 2 mm can avoid affecting the arrangement quantity of the bridge pieces and thus the heat exchange disturbance ability when the spacing between them is set too large, and also avoid encountering greater resistance and resulting in a slowdown in the fluid flow velocity when the spacing between them is set too small.

[0077] Set the width of each of the bridge pieces within the range of greater than or equal to 0.5 mm and less than or equal to 2 mm. When the width of the first bridge piece 21 is set too small, its area is too small, it is prone to cracking, and the heat exchange effect is not good. When the width of each of the bridge pieces is set too large, it affects the number of bridge pieces arranged, thereby affecting the ability of heat exchange disturbance.

[0078] Further, please refer to Figures 4 to 6 , in this embodiment, an installation hole a for the heat exchange tube to pass through is further provided on the fin body 1 adjacent to the bridge piece group 2; in the bridge piece group 2, the plurality of bridge pieces are located on one side of the installation hole a in the second direction, and each of the bridge pieces has a side end 20 close to the installation hole a, and the side ends 20 of the plurality of bridge pieces extend along the circumferential direction of the installation hole a.

[0079] When the heat exchange tube is installed in the installation hole a and the air flows through the heat exchange tube, a leeward area will be formed on one side of the heat exchange tube, and the heat exchange effect in the area located in the leeward area will become worse. By extending the side end 20 of the bridge piece along the circumferential direction of the installation hole a, in this way, the end of the formed heat exchange gap can extend along the circumferential direction of the installation hole a, so that the fluid can flow towards the leeward area when passing through the fin body 1, improving the low wind speed to a higher wind speed, enabling the area around the heat exchange tube to exchange heat evenly, and avoiding local overheating or overcooling of the fin structure 100.

[0080] Further, please refer to Figure 4 , in this embodiment, the plurality of side ends 20 are on an ellipse b with the center of the adjacent installation holes a as the geometric center.

[0081] When the wind blows towards the heat exchange tube, a model of spherical bead turbulence will be formed. Due to the existence of the spherical beads, the flow path of the fluid will be changed, causing the fluid to generate a circumferential flow when passing through the spherical beads, forming eddy currents and vortices. These eddy currents can break the thermal boundary layer between the fluid and the heat exchange surface, thereby increasing the convective heat transfer coefficient and improving the heat exchange efficiency. At the same time, a leeward area in the shape of an ellipse b will be formed. By arranging the plurality of side ends 20 on an ellipse b with the center of the adjacent installation holes a as the geometric center, the side end 20 of each bridge piece is arranged along an ellipse b trajectory, which can well correspond to the leeward area, enabling the area around the heat exchange tube to exchange heat evenly.

[0082] Specifically, in this embodiment, the minimum aperture diameter of the mounting hole a is D1; the ellipse b has a major axis in the third direction and a minor axis in the second direction. The major axis is LD and the minor axis is SD. The distance between two adjacent mounting holes a in the second direction is L. Among them, 1.5D1 ≤ LD ≤ 3D1, and 1.5D1 ≤ SD ≤ L / 2. Defining the major axis and the minor axis within the above ranges ensures that the arrangement of the bridge plate can not only provide sufficient space to form a complex fluid path, but also ensure the structural stability and heat exchange efficiency.

[0083] The present utility model also provides a heat exchanger, which includes heat exchange tubes and a fin structure 100. The specific structure of the fin structure 100 refers to the above embodiment. Since this heat exchanger adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0084] The present utility model also provides an air conditioning device, which includes heat exchange tubes and a compressor. The specific structure of the heat exchanger refers to the above embodiment. Since this air conditioning device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0085] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A fin structure, characterized in that, It includes a fin body which has a first side and a second side in a first direction. The fin body is provided with a hollow structure, and at least one bridge plate group is arranged on the fin body. The bridge plate group includes a plurality of bridge plates corresponding to the hollow area of the fin body. The main body parts of the bridge plates are staggered with the fin body in the first direction, so as to form a plurality of heat exchange gaps between the main body parts of the bridge plates and the fin body. In one bridge plate group, the plurality of bridge plates include at least two first bridge plates located on the first side of the fin body, and the main body parts of at least the two first bridge plates are staggered in the first direction.

2. The fin structure according to claim 1, wherein In one bridge plate group, the plurality of bridge plates extend along a second direction and are arranged at intervals in a third direction in turn.

3. The fin structure according to claim 1, characterized in that, In the bridge plate group, the number of the first bridge plates is set to be at least three. Among the three first bridge plates, the heat exchange gap formed between the first bridge plates on both sides and the fin body is a first heat exchange gap, and the heat exchange gap formed between the first bridge plate in the middle and the fin body is a second heat exchange gap. The first heat exchange gap is smaller than the second heat exchange gap.

4. The fin structure according to claim 3, wherein, The fin structure includes a plurality of fin bodies arranged at intervals in the first direction. The distance between two adjacent fin bodies is W, and the thickness of the fin body is t. The first heat exchange gap is h1, and the second heat exchange gap is h2. Wherein, 2t≤h1≤W / 2, and (W - t) / 2≤h2≤W - t.

5. The fin structure according to any one of claims 1 to 4, characterized in that, In the bridge plate group, the plurality of bridge plates further include second bridge plates arranged on the second side of the fin body.

6. The fin structure according to claim 5, wherein, The fin structure includes a plurality of fin bodies arranged at intervals in the first direction. The distance between two adjacent fin bodies is W, and the thickness of the fin body is t. The third heat exchange gap formed between the second bridge plate and the fin body is h3. Wherein, t≤h3≤W - t.

7. The fin structure according to claim 5, wherein, In the bridge plate group, on the areas of the first side of the fin body corresponding to both sides of the second bridge plate, a plurality of the first bridge plates are respectively arranged.

8. The fin structure according to claim 2, wherein In the bridge plate group, the distance between every two adjacent first bridge plates located on the first side of the fin body in the third direction is S. Wherein, 0.5mm≤S≤2mm; and / or, The width of each bridge plate in the third direction is S. Wherein, 0.5mm≤S≤2mm.

9. The fin structure according to claim 1, wherein An installation hole for a heat exchange tube to pass through is further arranged on the fin body adjacent to the bridge plate group. In the bridge plate group, the plurality of bridge plates are located on one side of the installation hole in the second direction. Each bridge plate has a side end close to the installation hole, and the side ends of the plurality of bridge plates extend along the circumferential direction of the installation hole.

10. The fin structure according to claim 9, characterized in that, The plurality of side ends are on an ellipse with the center of the adjacent installation holes as the geometric center.

11. The fin structure according to claim 10, wherein, The minimum aperture of the installation hole is D1. The ellipse has a major axis in the third direction and a minor axis in the second direction. The major axis is LD and the minor axis is SD. The distance between two adjacent mounting holes in the second direction is L. Among them, 1.5D1 ≤ LD ≤ 3D1, and 1.5D1 ≤ SD ≤ L / 2.

12. The fin structure according to claim 1, wherein, In the bridge chip group, the number of the multiple bridge chips is n, where 3 ≤ n ≤ 9.

13. A heat exchanger, characterized in that, It includes the fin structure according to any one of claims 1 to 12.

14. An air conditioning device, characterized in that, It includes the heat exchanger according to claim 13.

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