Fin set, heat exchanger and air conditioner

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a fin set, a heat exchanger and an air conditioner. The problems that an existing fin is poor in sealing effect and poor in waterproof performance are solved. In order to achieve the purpose, the fin set comprises three special-shaped fins, each special-shaped fin comprises a body, a plurality of heat exchange tube holes are formed in each body and arranged in three rows, and a first notch and a second notch are formed in the two ends of one long edge of each body correspondingly and matched with each other. Every two adjacent special-shaped fins can be spliced in a sealed mode through the corresponding first notch and the corresponding second notch, a first preset included angle can be formed between every two adjacent special-shaped fins, and a second preset included angle can be formed between the other two adjacent special-shaped fins. By the adoption of the technical scheme, the fin set can be formed in an integrated punching mode, the adjacent fins can be self-sealed, condensate water can flow along the edges of the three special-shaped fins, and the heat exchange efficiency is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a fin group, a heat exchanger and an air conditioner. Background Art

[0002] As a component for enhancing heat transfer, fins are usually installed on the surface of heat exchange tubes to improve the heat transfer efficiency by increasing the contact area with the surrounding heat exchange fluid. Among them, compared with single-row or double-row fins, three-row fins significantly increase the contact area with the surrounding heat exchange fluid, and can achieve higher heat transfer effects in a smaller space.

[0003] In the prior art, multiple fins are usually spliced by means of welding, bonding, connecting pieces, etc. However, the above splicing methods may affect the connection quality and sealing effect between multiple fins, and the included angles generated during the splicing of the existing fins may cause water flow to pass through the heat exchange tube holes, thereby forming a heat insulation layer between the heat exchange tube and the fins, affecting the heat transfer effect.

[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problems of poor sealing effect and poor waterproof performance of the existing fins, the present application provides a fin group, the fin group includes three special-shaped fins, the special-shaped fins include a body, a plurality of heat exchange tube holes are formed in the body, the plurality of heat exchange tube holes are arranged in three rows, and two ends of one long side of the body respectively form a first notch and a second notch, and the first notch and the second notch are adapted to each other;

[0006] Two adjacent special-shaped fins can be hermetically spliced through the first notch and the second notch, and when the three special-shaped fins are hermetically spliced in sequence, a first preset included angle can be presented between two adjacent special-shaped fins, and a second preset included angle can be presented between the other two adjacent special-shaped fins;

[0007] Wherein, the first preset included angle is any value between 77° and 78°, and the second preset included angle is any value between 140.5° and 141.5°.

[0008] In the case of adopting the above technical solution, the fin group can be integrally punched. After cutting the fin group, three special-shaped fins can be obtained. Each two special-shaped fins can be hermetically spliced through the first notch on one special-shaped fin and the second notch on the other special-shaped fin. Moreover, a first preset angle is presented between the first special-shaped fin and the second special-shaped fin, and a second preset angle is presented between the second special-shaped fin and the third special-shaped fin. At this time, the condensed water can flow along the edges of the three special-shaped fins, avoiding the contact between the condensed water and the heat exchange tube holes and affecting the heat exchange efficiency.

[0009] In the preferred technical solution of the above fin group, both the first notch and the second notch include continuous straight-line segments and curved segments. Two adjacent special-shaped fins can be hermetically spliced through the straight-line segments, and the other two adjacent special-shaped fins can be hermetically spliced through the curved segments.

[0010] In the preferred technical solution of the above fin group, the first notch includes a first straight-line segment, a second straight-line segment, and a first curved segment connected in sequence. One end of the first straight-line segment is located on the short side of the body, and there is an angle between the first straight-line segment and the short side of the body. The second straight-line segment is perpendicular to the first straight-line segment, and one end of the first curved segment is located on the long side of the body;

[0011] The second notch includes a third straight-line segment, a fourth straight-line segment, a second curved segment, a fifth straight-line segment, a sixth straight-line segment, and a seventh straight-line segment connected in sequence. One end of the third straight-line segment is located on the short side of the body, and there is an angle between the third straight-line segment and the short side of the body. There is an angle between the fourth straight-line segment and the third straight-line segment. The fifth straight-line segment is perpendicular to the long side, the sixth straight-line segment is perpendicular to the short side, and the seventh straight-line segment is perpendicular to the long side and one end is located on the long side of the body.

[0012] In the preferred technical solution of the above fin group, the projected length of the first straight-line segment on the long side is 1.4 mm, the projected length of the second straight-line segment on the long side is 2.5 mm, the projected length on the short side is 11.1 mm, the radius of the first curved segment is 5.4 mm, and the projected length on the short side is 3.2 mm;

[0013] The projected length of the third straight-line segment on the long side is 1.1 mm, the projected length of the fourth straight-line segment on the long side is 1.5 mm, the projected length on the short side is 3 mm, the radius of the second curved segment is 4.95 mm, the projected length of the fifth straight-line segment on the short side is 1.4 mm, the projected length of the sixth straight-line segment on the long side is 4.1 mm, and the projected length of the seventh straight-line segment on the short side is 0.3 mm.

[0014] In the preferred technical solution of the above fin group, third notches and fourth notches are respectively formed at two ends of the other long side of the body, and the third notches and the fourth notches include continuous straight segments and / or curved segments arranged to avoid a plurality of the heat exchange tube holes.

[0015] In the case of adopting the above technical solution, the setting of the third notches and the fourth notches can, on the one hand, cause disturbance when air passes through, thereby improving the heat exchange efficiency of the special-shaped fins, and on the other hand, can reduce the length of the cutting lines on the body, facilitating the cutting and separation of two adjacent special-shaped fins, thereby improving the production efficiency of the special-shaped fins.

[0016] In the preferred technical solution of the above fin group, the third notch includes three straight segments; and / or

[0017] The fourth notch includes five straight segments and a curved segment.

[0018] In the preferred technical solution of the above fin group, the length of the special-shaped fin in the middle is greater than the lengths of the special-shaped fins on both sides, and the lengths of the special-shaped fins on both sides are equal.

[0019] In the preferred technical solution of the above fin group, the length of the special-shaped fin in the middle is 168 mm, and the lengths of the special-shaped fins on both sides are both 126 mm; and / or

[0020] The widths of the special-shaped fins are all 39.9 mm.

[0021] The present application further provides a heat exchanger, the heat exchanger includes the fin group as described in any one of the above, and the fin group is provided with multiple layers.

[0022] In the case of adopting the above technical solution, the fin group can be integrally punched, improving the production efficiency of the fin group, and the condensed water can flow along the edges of the special-shaped fins, avoiding the formation of a heat insulation layer between the fins and the heat exchange tubes when the condensed water contacts the heat exchange tube holes, and also avoiding the corrosion of the fins and the heat exchange tubes caused by moisture, thereby ensuring the heat exchange efficiency of the heat exchange tubes.

[0023] The present application further provides an air conditioner, the air conditioner includes the special-shaped fin or the heat exchanger as described in any one of the above, when a second preset angle is presented between two of the special-shaped fins, the special-shaped fin located on the outside is arranged vertically.

[0024] In the case of adopting the above technical solution, the fin group can be integrally punched, which improves the production efficiency of the fin group. When the special-shaped fins located on the outside are vertically arranged, the normal function of draining the condensed water can be ensured by the first preset angle and the second preset angle, avoiding the contact between the condensed water and the heat exchange tube holes and affecting the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The fin group of the present application will be described below with reference to the accompanying drawings. In the drawings:

[0026] Figure 1 is a schematic diagram of the fin group of the present application;

[0027] Figure 2 is a schematic diagram of the special-shaped fins of an embodiment of the present application;

[0028] Figure 3 is a cutting schematic diagram of the fin group of the present application;

[0029] Figure 4 is a front view of the heat exchanger of the present application;

[0030] Figure 5 is a rear view of the heat exchanger of the present application.

[0031] LIST OF REFERENCE NUMERALS

[0032] 10, fin group; 11, body; 12, heat exchange tube holes; 13, first notch; 14, second notch; 15, third notch; 16, fourth notch; 20, heat exchange tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. For example, although the first notch and the second notch in the drawings both include continuous straight line segments and curved line segments, this is not intended to limit the protection scope of the present application. Those skilled in the art can adjust them according to needs to adapt to specific application scenarios. For example, both the first notch and the second notch are set as a plurality of continuous straight line segments.

[0034] It should be noted that in the description of this application, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Additionally, in the description of this application, "a plurality of" means at least two.

[0035] Furthermore, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] As described in the background art, as a component for enhancing heat transfer, fins are usually mounted on the surface of heat exchange tubes to improve the heat transfer efficiency by increasing the contact area with the surrounding heat exchange fluid. Among them, compared with single-row or double-row fins, three rows of fins significantly increase the contact area with the surrounding heat exchange fluid, and higher heat transfer effects can be achieved in a smaller space.

[0037] In the prior art, it is usually necessary to splice multiple fins by means of welding, bonding, connectors, etc. However, the above splicing methods may affect the connection quality and sealing effect between multiple fins, and the included angles generated when the existing fins are spliced may cause water flow to pass through the heat exchange tube holes, thereby forming a heat insulation layer between the heat exchange tube and the fins, affecting the heat transfer effect.

[0038] To solve the problems of poor sealing effect and poor waterproof performance existing in the existing fins, this application provides a fin group. The fin group includes three special-shaped fins. The special-shaped fin includes a body, and a plurality of heat exchange tube holes are formed on the body. The plurality of heat exchange tube holes are arranged in three rows. At both ends of one long side of the body, a first notch and a second notch are respectively formed, and the first notch and the second notch are adapted to each other. Two adjacent special-shaped fins can be hermetically spliced through the first notch and the second notch, and when the three special-shaped fins are hermetically spliced in sequence, a first preset included angle can be presented between two adjacent special-shaped fins, and a second preset included angle can be presented between the other two adjacent special-shaped fins. Among them, the first preset included angle is any value in the range of 77° - 78°, and the second preset included angle is any value in the range of 140.5° - 141.5°.

[0039] In the case of adopting the above technical solution, the fin group can be integrally punched. After cutting the fin group, three special-shaped fins can be obtained. Each two special-shaped fins can be hermetically spliced through a first notch on one special-shaped fin and a second notch on the other special-shaped fin. Moreover, a first preset angle is presented between the first special-shaped fin and the second special-shaped fin, and a second preset angle is presented between the second special-shaped fin and the third special-shaped fin. At this time, the condensed water can flow along the edges of the three special-shaped fins, avoiding the contact between the condensed water and the heat exchange tube holes and thus affecting the heat exchange efficiency.

[0040] The following refers to Figures 1 to 3 for a description of the fin group of the present application. Among them, Figure 1 is a schematic diagram of the fin group of the present application; Figure 2 is a schematic diagram of a special-shaped fin of an embodiment of the present application; Figure 3 is a cutting schematic diagram of the fin group of the present application.

[0041] As Figures 1 to 3 shown, in a preferred embodiment, the fin group 10 includes three special-shaped fins. The special-shaped fin includes a body 11, and a plurality of heat exchange tube holes 12 are formed on the body 11. The plurality of heat exchange tube holes 12 are arranged in three rows. At both ends of one long side of the body 11, a first notch 13 and a second notch 14 are respectively formed. The first notch 13 and the second notch 14 are adapted to each other. At both ends of the other long side of the body 11, a third notch 15 and a fourth notch 16 are respectively formed.

[0042] Both the first notch 13 and the second notch 14 include a continuous straight-line segment and a curved-line segment. Taking the direction shown in Figure 1 as an example, the two special-shaped fins on the right can be hermetically spliced through the straight-line segment, and the two special-shaped fins on the left can be hermetically spliced through the curved-line segment. Specifically, as Figure 2 shown, the first notch 13 includes a first straight-line segment, a second straight-line segment, and a first curved-line segment connected in sequence from top to bottom. One end of the first straight-line segment is located on the short side of the body 11. There is an angle between the first straight-line segment and the short side of the body 11. The second straight-line segment is perpendicular to the first straight-line segment. One end of the first curved-line segment is located on the long side of the body. The second notch 14 includes a third straight-line segment, a fourth straight-line segment, a second curved-line segment, a fifth straight-line segment, a sixth straight-line segment, and a seventh straight-line segment connected in sequence from top to bottom. One end of the third straight-line segment is located on the short side of the body. There is an angle between the third straight-line segment and the short side of the body, and it is equal to the angle between the first straight-line segment and the short side. There is an angle between the fourth straight-line segment and the third straight-line segment. The fifth straight-line segment is perpendicular to the long side. The sixth straight-line segment is perpendicular to the short side. The seventh straight-line segment is perpendicular to the long side and one end is located on the long side of the body. Returning to refer to Figure 1, when the two special-shaped fins on the right are hermetically spliced, the fifth straight line segment on the middle special-shaped fin contacts the first straight line segment on the rightmost special-shaped fin, and a part of the long side on the middle special-shaped fin contacts a part of the second straight line segment on the rightmost special-shaped fin, and at this time, a first preset angle is presented between the two. When the two special-shaped fins on the left are hermetically spliced, a part of the second curved segment on the leftmost special-shaped fin contacts a part of the first curved segment on the middle special-shaped fin, and the fourth straight line segment on the leftmost special-shaped fin contacts a part of the second straight line segment on the middle special-shaped fin, and at this time, a second preset angle is presented between the two. Among them, the first preset angle is any value in 77° - 78°, and the second preset angle is any value in 140.5° - 141.5°. Preferably, the first preset angle is 77.5°, and the second preset angle is 141°.

[0043] In this embodiment, the leftmost special-shaped fin is vertically arranged, and the length of the middle special-shaped fin is greater than the lengths of the special-shaped fins on both sides, and the lengths of the special-shaped fins on both sides are equal. Specifically, the length of the middle special-shaped fin is 168 mm, the lengths of the special-shaped fins on both sides are both 126 mm, and the width of the special-shaped fin is 39.9 mm.

[0044] The projection length of the first straight line segment on the long side is 1.4 mm, the projection length of the second straight line segment on the long side is 2.5 mm, the projection length on the short side is 11.1 mm, the radius of the first curved segment is 5.4 mm, and the projection length on the short side is 3.2 mm; the projection length of the third straight line segment on the long side is 1.1 mm, the projection length of the fourth straight line segment on the long side is 1.5 mm, the projection length on the short side is 3 mm, the radius of the second curved segment is 4.95 mm, the projection length of the fifth straight line segment on the short side is 1.4 mm, the projection length of the sixth straight line segment on the long side is 4.1 mm, and the projection length of the seventh straight line segment on the short side is 0.3 mm.

[0045] Continue to refer to Figure 2 , the third notch 15 includes three straight line segments connected in sequence from top to bottom. The straight line segment at the uppermost position is perpendicular to the long side, and its projection length on the short side is 0.3 mm. The straight line segment in the middle has an angle with the straight line segments on both sides, and its projection lengths on the short side and on the long side are both 13.2 mm. The straight line segment at the lowermost position is perpendicular to the short side, and its projection length on the long side is 0.3 mm. The fourth notch includes three straight line segments, a curved segment, and two straight line segments connected in sequence from top to bottom. Each straight line segment is perpendicular to the long side or the short side, and the lengths of the five straight line segments are 0.3 mm, 8.22 mm, 1.4 mm, 3.1 mm, and 2 mm in sequence, and the radius of the curved segment is 4.95 mm.

[0046] It should be noted that, as Figure 3 shown, in this embodiment, multiple fin groups 10 can be integrally punched. Specifically, heat exchange tube holes 12 and each empty groove can be punched on an aluminum foil sheet, and then each fin group 10 is separated. The two sides of the body 11 of the special-shaped fin in the middle are dividing lines, and each fin group 10 can be cut into three special-shaped fins by cutting along the dividing lines. Referring back to Figure 1 , the sealed splicing of the three special-shaped fins is realized through the first notch 13 and the second notch 14. In a possible embodiment, during the heat exchange process, air flows from the outside to the inside of the three special-shaped fins. Due to the temperature difference, condensed water may be generated on the special-shaped fins. Taking the special-shaped fin in the middle as an example, at this time, the condensed water can flow through the edge of the short side of the special-shaped fin in the middle and the edge of the short side of the special-shaped fin on the right, and then drip through the edge of the long side of the special-shaped fin on the right. At this time, sealant can also be filled when the first notch 13 and the second notch 14 are spliced, so as to further prevent water droplets from passing through the gap between the two special-shaped fins. The condensed water on the other side can drip along the edge of the long side of the special-shaped fin in the middle, or further drip along the edge of the long side of the special-shaped fin on the left.

[0047] Those skilled in the art can understand that the specific settings of the first notch 13 and the second notch 14 are not fixed. Those skilled in the art can change their composition and the length of each straight line segment or curve segment according to needs, as long as it can ensure that a first preset angle or a second preset angle can be presented when two special-shaped fins are spliced. In an alternative embodiment, the first notch 13 and the second notch 14 can only include multiple continuous straight line segments, and the sealed splicing of the two special-shaped fins is realized through straight line segments with different lengths and orientations. In another alternative embodiment, the first notch 13 and the second notch 14 can only include multiple continuous curve segments. At this time, the sealed splicing of the two special-shaped fins can be realized through curve segments with different radii or curvatures.

[0048] Those skilled in the art can also understand that in this embodiment, when air flows through the third notch 15 and the fourth notch 16, disturbances can be generated, thereby enhancing the heat exchange effect and improving the heat exchange efficiency. However, the specific settings of the third notch 15 and the fourth notch 16 are not fixed. Those skilled in the art can change their composition and the lengths of each straight segment or curved segment according to requirements. In an alternative embodiment, the third notch 15 and the fourth notch 16 can be omitted. However, considering that the settings of the third notch 15 and the fourth notch 16 can reduce the length of the cutting line, which is beneficial to dividing the fin group 10 into three special-shaped fins and improving the production efficiency, setting the third notch 15 and the fourth notch 16 is a better choice. In addition, the specific settings of the three special-shaped fins are not fixed either. In an alternative embodiment, those skilled in the art can change the length and width of the fin group 10 according to requirements, as long as the normal functions of the fin group of the present application are not hindered. In another alternative embodiment, those skilled in the art can change the relative lengths between the three special-shaped fins. For example, the three special-shaped fins can be set to be of equal length.

[0049] The following will refer to Figure 4 and Figure 5 , and describe the heat exchanger of the present application. Among them, Figure 4 is the front view of the heat exchanger of the present application; Figure 5 is the rear view of the heat exchanger of the present application.

[0050] As Figure 4 and Figure 5 shown, in a possible embodiment, the heat exchanger includes the fin group 10 as described above, and the fin group 10 is provided with multiple layers. In this embodiment, multiple heat exchange tubes 20 respectively pass through the heat exchange tube holes 12 on the multiple layers of special-shaped fins. During the heat exchange process, air passes through the gaps between the multiple layers of fin groups 10 to complete the heat exchange between the fluid in the heat exchange tubes 20 and the air.

[0051] In the case of adopting the above technical solution, the fin group can be integrally punched, which improves the production efficiency of the fin group. And the condensed water can flow along the edges of the special-shaped fins, avoiding the formation of a heat insulation layer between the fins and the heat exchange tubes when the condensed water contacts the heat exchange tube holes, and also avoiding the corrosion of the fins and the heat exchange tubes caused by moisture, thereby ensuring the heat exchange efficiency of the heat exchange tubes.

[0052] The present application also provides an air conditioner, including the special-shaped fins or the heat exchanger as described above. When a second preset angle is presented between two special-shaped fins, the outer special-shaped fin is vertically arranged.

[0053] In the case of adopting the above technical solution, the fin group can be integrally punched, which improves the production efficiency of the fin group. Moreover, when the special-shaped fins located on the outside are vertically arranged, the normal function of draining the condensed water can be ensured by the first preset angle and the second preset angle, avoiding the contact between the condensed water and the heat exchange tube holes and affecting the heat exchange efficiency.

[0054] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0055] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A fin group, characterized in that, The fin group includes three special-shaped fins. The special-shaped fin includes a body, and a plurality of heat exchange tube holes are formed in the body. The plurality of heat exchange tube holes are arranged in three rows. At both ends of one long side of the body, a first notch and a second notch are respectively formed, and the first notch and the second notch are adapted to each other; Two adjacent special-shaped fins can be hermetically spliced through the first notch and the second notch. When the three special-shaped fins are hermetically spliced in sequence, a first preset angle can be presented between two adjacent special-shaped fins, and a second preset angle can be presented between the other two adjacent special-shaped fins; Wherein, the first preset angle is any value in the range of 77°-78°, and the second preset angle is any value in the range of 140.5°-141.5°.

2. The fin group according to claim 1, wherein Both the first notch and the second notch include a continuous straight line segment and a curved line segment. Two adjacent special-shaped fins can be hermetically spliced through the straight line segment, and the other two adjacent special-shaped fins can be hermetically spliced through the curved line segment.

3. The fin group according to claim 2, wherein The first notch includes a first straight line segment, a second straight line segment and a first curved line segment connected in sequence. One end of the first straight line segment is located on the short side of the body. There is an angle between the first straight line segment and the short side of the body. The second straight line segment is perpendicular to the first straight line segment. One end of the first curved line segment is located on the long side of the body; The second notch includes a third straight line segment, a fourth straight line segment, a second curved line segment, a fifth straight line segment, a sixth straight line segment and a seventh straight line segment connected in sequence. One end of the third straight line segment is located on the short side of the body. There is an angle between the third straight line segment and the short side of the body. There is an angle between the fourth straight line segment and the third straight line segment. The fifth straight line segment is perpendicular to the long side. The sixth straight line segment is perpendicular to the short side. The seventh straight line segment is perpendicular to the long side and one end is located on the long side of the body.

4. The fin group according to claim 3, characterized in that, The projection length of the first straight line segment on the long side is 1.4 mm. The projection length of the second straight line segment on the long side is 2.5 mm, and the projection length on the short side is 11.1 mm. The radius of the first curved line segment is 5.4 mm, and the projection length on the short side is 3.2 mm; The projection length of the third straight line segment on the long side is 1.1 mm. The projection length of the fourth straight line segment on the long side is 1.5 mm, and the projection length on the short side is 3 mm. The radius of the second curved line segment is 4.95 mm. The projection length of the fifth straight line segment on the short side is 1.4 mm. The projection length of the sixth straight line segment on the long side is 4.1 mm. The projection length of the seventh straight line segment on the short side is 0.3 mm.

5. The fin group according to claim 3 or 4, characterized in that, At both ends of the other long side of the body, a third notch and a fourth notch are respectively formed. The third notch and the fourth notch include continuous straight line segments and / or curved line segments arranged to avoid the plurality of heat exchange tube holes.

6. The fin group according to claim 5, wherein The third notch includes three straight line segments; and / or The fourth notch includes five straight line segments and one curved line segment.

7. The fin group according to claim 1, wherein The length of the shaped fin located in the middle is greater than the lengths of the shaped fins located on both sides, and the lengths of the shaped fins located on both sides are equal.

8. The fin group according to claim 7, wherein The length of the shaped fin located in the middle is 168 mm, and the lengths of the shaped fins located on both sides are both 126 mm; and / or The widths of the shaped fins are all 39.9 mm.

9. A heat exchanger, characterized in that, The heat exchanger includes the fin group according to any one of claims 1-8, and the fin group is provided with multiple layers.

10. An air conditioner, characterized in that, The air conditioner includes the shaped fin according to any one of claims 1-8 or the heat exchanger according to claim 9. When the second preset angle is presented between the two shaped fins, the shaped fin located on the outside is arranged vertically.

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