Fin, and heat exchanger and heat exchange system having same

Abstract

Disclosed in the present application are a fin, and a heat exchanger and a heat exchange system having same. The fin comprises a fin body, a flange and a spacer, wherein the fin body is provided with a first through hole and a second through hole, the first through hole and the second through hole penetrating through the fin body; the fin body comprises a first edge portion defining the first through hole, the fin body further comprises a second edge portion defining the second through hole, and the flange is connected to the second edge portion; and the spacer is provided with a first fixed end and a first free end, wherein the first free end is farther away from the fin body than the first fixed end, the first fixed end is connected to the first edge portion, a vertical distance between the first free end and the fin body is H, and a vertical distance between the flange and the fin body is h, H being greater than or equal to h. The heat exchanger and the heat exchange system using the fin are conductive to controlling a fin spacing of adjacent fins of the heat exchanger, and improving the reliability of the heat exchanger.

Description

Fin, heat exchanger having the same, and heat exchange system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority and benefits to Chinese patent application number 202420613448.X, filed on March 27, 2024, and priority and benefits to Chinese patent application number 202421558991.0, filed on July 3, 2024. The entire contents of the above-mentioned Chinese patent applications are hereby incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of heat exchange technology, and in particular to a fin and a heat exchanger having the fin. Background Art

[0004] In the related art, an insert-type heat exchanger is generally composed of a plurality of fins and a plurality of heat exchange tubes, and the plurality of fins are arranged at intervals in the extension direction of the heat exchange tubes. In some heat exchangers, since the heat exchanger uses heat exchange tubes with smaller diameters, the fins have to be adapted to the small-diameter heat exchange tubes, which results in a reduction in the local area on the fins that can be used to manufacture flanges. As a result, the predetermined spacing between adjacent fins is limited, making it impossible to meet the fin spacing of various specifications in different application environments of the heat exchanger. Summary of the Invention

[0005] To this end, the present application proposes a fin, the material of which is effectively utilized, which is conducive to adjusting the height size of the spacer.

[0006] According to a first aspect of an embodiment of the present application, a fin is provided, which includes a fin body, a spacer and a flange, the fin body having a first through hole and a second through hole, the first through hole and the second through hole passing through the fin body, the hydraulic diameter of the second through hole being larger than the hydraulic diameter of the first through hole, and in the width direction of the fin body, the first through hole is closer to the edge of the fin body than the second through hole, the edge of the first through hole is defined as a first edge portion, and the edge of the second through hole is defined as a second edge portion, the spacer includes a first fixed end and a first free end, the first free end is farther away from the fin body than the first fixed end, the first fixed end is connected to the first edge portion, and the vertical distance between the first free end and the fin body is H, the flange includes a second fixed end and a second free end, the second fixed end is connected to the second edge portion, and the vertical distance between the second free end of the flange and the fin body is h, H≥h.

[0007] According to the fins provided in the embodiments of the present application, spacers are provided on the fins, and the vertical distance H between the spacers and the fin body is greater than or equal to the vertical distance h between the flange and the fin body. The height of the spacers can be adjusted, thereby facilitating adjustment of the fin spacing between adjacent fins of the heat exchanger.

[0008] The second aspect of this embodiment provides a heat exchanger, which includes a first header, a second header and a heat exchange tube, one end of the heat exchange tube is directly or indirectly connected to the first header, and the other end of the heat exchange tube is directly or indirectly connected to the second header. The heat exchanger also includes the fin, and the fin includes the spacer. The heat exchange tube passes through the second through hole. There are multiple fins, and the multiple fins are spaced apart in the length direction of the heat exchange tube. The spacer of one fin is fixedly connected to the fin body of another adjacent fin.

[0009] According to the heat exchanger provided in an embodiment of the present application, a plurality of fins are arranged at intervals in the length direction of the heat exchange tube, and the flange includes a spacer. The spacer of one fin is fixedly connected to the fin body of another adjacent fin, thereby facilitating control of the distance between adjacent fins.

[0010] A third aspect of an embodiment of the present application proposes a heat exchange system, which includes a compressor, at least one first heat exchanger, a throttling device and at least one second heat exchanger, wherein the first heat exchanger and / or the second heat exchanger include the fins with the spacers.

[0011] According to the heat exchange system provided in the embodiment of the present application, the fins in the heat exchanger used in the heat exchange system are conducive to controlling the distance between adjacent fins, thereby improving the reliability of the heat exchanger and thus helping to improve the stability of the heat exchange system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present application;

[0013] FIG2 is a schematic structural diagram of a heat exchanger according to another embodiment of the present application;

[0014] FIG3 is a schematic structural diagram of a fin according to an embodiment of the present application;

[0015] FIG4 is a schematic structural diagram of the fin shown in FIG3 from another angle;

[0016] FIG5 is a schematic cross-sectional view of the fin shown in FIG3 in the AA direction

[0017] FIG6 is an enlarged view of the fin portion C shown in FIG3 ;

[0018] FIG7 is a schematic cross-sectional view of the fin shown in FIG1 in the BB direction;

[0019] FIG8 is an enlarged view of the fin portion D shown in FIG7;

[0020] FIG9 is a schematic diagram of a fin structure according to another embodiment of the present application;

[0021] FIG10 is a schematic diagram of the fin structure of the fin shown in FIG9 at another angle;

[0022] FIG11 is a schematic diagram of a heat exchange system according to one embodiment of the present application.

[0023] Reference numerals: Heat exchanger 1000, fin 1, fin body 10, first through hole 101, second through hole 102, first edge portion 103, second edge portion 104, flange 11, spacer 12, transition portion 121, first sub-spacer 1211, second sub-spacer 1212, first side surface 105, first contour line 106, second contour line 107, third contour line 108, fourth contour line 109, fifth contour line 110, sixth contour line 111, reinforcing rib 123, header 2, heat exchange tube 3, window 13, first window 131, second window 132, first fixed end portion 1213, first free end portion 1214, second fixed end portion 111, second free end portion 112, compressor 100, first heat exchanger 200, throttling device 300, second heat exchanger 400, reversing valve 500 DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element fixture referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0025] As shown in Figures 1 and 2, according to the heat exchanger 1000 of the embodiment of the present application, the heat exchanger 1000 includes a plurality of fins 1, two headers 2, and a plurality of heat exchange tubes 3. The aforementioned fins 1, headers 2, and heat exchange tubes 3 are all aluminum alloy components, which are welded together by brazing. The fins 1 are plate-shaped fins, and one fin 1 has a plurality of second through holes 102 for the heat exchange tubes 3 to pass through. The heat exchange tubes 3 are arranged to be consistent with the direction of the air flow, the headers 2 are arranged so that the length direction of the headers 2 is perpendicular to the length direction of the heat exchange tubes or at other angles, and the fins 1 are arranged so that the length direction of the fins is perpendicular to the direction of the air flow.

[0026] The header 2 is formed as a cylindrical aluminum pipe fitting with a long longitudinal length. One header 2 is arranged at the left end of the heat exchanger 1000, and the other header 2 is arranged at the right end of the heat exchanger 1000. The heat exchange tube 3 is a heat transfer tube with a circular cross-sectional shape. Multiple heat exchange tubes 3 are arranged at intervals in the length direction of the header 2. The heat exchange tube 3 has a channel for the circulation of refrigerant. One end of the heat exchange tube 3 is inserted into one header 2, and the other end of the heat exchange tube 3 is inserted into the other header 2.

[0027] As shown in FIG3 , the fin 1 is a plate-shaped fin having a relatively long longitudinal length formed by stamping an aluminum metal plate. The fin 1 includes a plate-shaped fin body 10, a flange 11 and a spacer 12. The fin body 10 includes a first edge portion 103 surrounding a first through hole 101 and a second edge portion 104 surrounding a second through hole 102. That is, after stamping the preset position of the fin 1, the flange 11 and the second through hole 102, as well as the spacer 12 and the first through hole 101 are formed. The hydraulic diameter of the second through hole 102 is greater than The hydraulic diameter of the first through-hole 101 is closer to the edge of the fin body 10 than the second through-hole 102 in the width direction of the fin body 10. The second through-hole 102 is for the heat exchange tube 3 to pass through. The flange 11 supports and secures the heat exchange tube 3, facilitating welding and fixation. On the other hand, when the heat exchange tube passes through multiple spaced fins one by one, the flange 11 guides the end of the heat exchange tube 3 during insertion, thereby reducing the displacement deviation of the heat exchange tube 3 during insertion, which is beneficial to improving the reliability of the heat exchanger. On the other hand, the flange 11 can be a full ring-like flange 3 arranged at the edge of the second through-hole 102, or it can be a flange 3 of another structure, such as a flange 3 with a circular arc or polyline outline.

[0028] The technicians found that since the diameter of the heat exchange tube 3 is small, the area of ​​the first through hole 101 on the fin 1 for the heat exchange tube 3 to pass through is also relatively small, and the flange 11 is made of the material produced by manufacturing the first through hole 101. If the distance between two adjacent fin bodies 10 is greater than the diameter of the heat exchange tube 3, the preset distance cannot be effectively controlled by the flange. The technicians thought of setting a spacer 12 to effectively control the distance between two adjacent fin bodies 10, and the spacer 12 is taken from the fin 3 material. The height of the spacer 12 can be freely adjusted according to the preset height. Therefore, the fin 1 material is effectively utilized, which is conducive to adjusting the height size of the spacer 12 and the fin spacing between adjacent fins 1 of the heat exchanger 1000.

[0029] The technicians further discovered that if the height of the flange 11 can reach a preset height, there is no need to control the spacing by additionally setting up spacers 12. Therefore, in order to be able to realize design schemes with different spacings, by setting spacers 12 and the height of the spacers 12 is greater than or equal to the height of the flange 11, that is, H≥h, the difficulty of the high size limitation of the spacing between adjacent fins 1 can be reduced, thereby improving the flexibility and applicability of the fin 1 structure.

[0030] As shown in Figures 3, 4, 7 and 10, a first spacer 12 is provided above the second through hole 102, and a second spacer 12' is provided below the second through hole 102. The first spacer 12 and the second spacer 12' are located on different sides of the flange 11 in the width direction of the fin body 10. The first fixed end 1213 of the first spacer 12 is connected to the first edge portion 103. The fin body 10 has a first side surface 105 along the thickness direction of the fin body 10. The first fixed end 1213 of the first spacer 12 is connected to the first edge portion 103. The first side surface has a first contour line 106, and the first edge portion 103 includes a second contour line 107 and a third contour line 108 on the first side surface 105 of the fin body 10. The second contour line 107 is closer to the flange 11 than the third contour line 108. The second contour line 107 intersects with one end of the first contour line 106, and the third contour line 108 intersects with the other end of the first contour line 106. The second contour line 107 intersects with the first contour line 106 at point Q. The second spacer 12 The first fixed end portion 1213 of the second spacer 12' is connected to the other first edge portion 103, and the first fixed end portion 1213 of the second spacer 12' has a fourth contour line 109 on the first side 105. The first edge portion 103 includes a fifth contour line 110 and a sixth contour line 111 on the first side 105 of the fin body 10. The fifth contour line 110 intersects with one end of the fourth contour line 109, and the sixth contour line 111 intersects with the other end of the fourth contour line 109. The fifth contour line 110 is larger than the sixth contour line 111. Line 111 is close to the flange 11, the fourth contour line 109 and the fifth contour line 110 intersect at point Q', the vertical distance from point Q to the outer surface of the flange 11 is L1, the vertical distance from point Q to the second edge portion 104 is L1, and the vertical distance from point Q' to the second edge portion 104 is L2, L1≤L2, L1 is less than or equal to L2, which is beneficial to reducing the heat exchange efficiency of the windward side of the fin 1 under the heat pump working condition, and is beneficial to reducing frost on the windward side of the fin 1 and improving the frost thickness on the surface of the fin 1.

[0031] In some embodiments, as shown in Figures 6 and 8, the fin 1 includes a fin body 10, a spacer 12 and a flange 11, the fin body 10 has a first through hole 101 and a second through hole 102, the first through hole 101 and the second through hole 102 pass through the fin body 10, the hydraulic diameter of the second through hole 102 is greater than the hydraulic diameter of the first through hole 101, in the width direction of the fin body 10, the first through hole 101 is closer to the edge of the fin body 10 than the second through hole 102, the edge of the first through hole 101 is defined as the first edge portion 103, and the edge of the second through hole 102 is defined as The second edge portion 104, the spacer 12 includes a first fixed end portion 1213 and a first free end portion 1214, the first free end portion 1214 is farther away from the fin body 10 than the first fixed end portion 1213, the first fixed end portion 1213 is connected to the first edge portion 103, the vertical distance between the first free end portion 1214 and the fin body 10 is H, the flange 11 includes a second fixed end portion 111 and a second free end portion 112, the second fixed end portion 111 is connected to the second edge portion 104, the vertical distance between the second free end portion 112 of the flange 11 and the fin body 10 is h, H≥h.

[0032] It is understood that, in the embodiment of the present application, h refers to the vertical distance between the second free end of the flange and the fin body. Considering that the flange structure may have various shapes, the height of the flange refers to the overall height of the flange, that is, the distance between the plane where the second sub-spacer 1212 is located and the plane where the fin body 10 is located.

[0033] Furthermore, as shown in Figure 4, the fin 1 includes a spacer 12, and the two spacers 12 are located on both sides of the first through hole 101 in the width direction of the fin 1, that is, one spacer 12 is located above the second through hole 102, and the other spacer 12 is located below the second through hole 102. The two flanges 11 and the two spacers 12 are roughly located in four directions, and the vertical distance from the first spacer 12 located above the second through hole 102 to the flange 11 is defined to be equal to the vertical distance from the second spacer 12' to the flange 11. The extension direction of the first contour line 106 is parallel to the extension direction of the fourth contour line 109. When the heat exchange tube 3 passes through the second through hole 102 of the fin 1, the fin 1 is subjected to uniform force, which is beneficial to increasing the strength of the fin 1. The fin 1 is not easily deformed, which can improve the reliability of the fin 1.

[0034] In some embodiments, as shown in Figures 4 and 10, the inner diameter of the second through hole 102 is D, the vertical distance from point Q to the outer surface of the flange is L1, the inner diameter of the second through hole is D, 0.3<L1 / D<0.7, and / or, the vertical distance from point Q' to the outer surface of the flange 11 is L2, the inner diameter of the second through hole is D, 0.3<L2 / D<0.7, that is, the position of point Q is actually related to the position of the spacer 12. A smaller distance from point Q to the flange 11 means that the spacer 12 is closer to the flange 11. Conversely, a larger distance from point Q to the flange 11 means that the spacer 12 is farther away from the flange 22. When the ratio of L1 to the inner diameter D is less than 0.3, it is easy to cause uneven force on the local fins around the flange 11 when the heat exchange tube 3 passes through the second through hole 102 of the fin 1. In particular, when the same heat exchange tube 3 passes through multiple fins 1 arranged in sequence, it is easy to cause the fins to fall over, thereby affecting the reliability of the heat exchanger. Furthermore, if the ratio of L1 to the inner diameter D is greater than 0.7, the spacer 12 will extend beyond the flange 11, meaning that the spacer 12 will be closer to the widthwise ends of the fin 1. This can lead to insufficient strength at the ends of the fin 1, thus affecting the reliability of the fin and, consequently, the heat exchanger using the fin 1. Therefore, when the ratio of the spacer 12 to the inner diameter D of the second through hole 102 is within the range of 0.3 < L1 / D < 0.7, the strength of the fin 1 can be improved, the fin can be evenly compressed, and lodging can be reduced.

[0035] Specifically, as shown in Figures 5 to 8, the spacer 12 is formed by bending a part of the fin body 10, that is, the spacer 12 is formed by cutting out a part of the fin body 10 and folding it. Specifically, the spacer 12 is bent from the bending area of ​​the fin body 10 to stand up at a right angle. The spacer 12 includes a first sub-spacer 1211 and a second sub-spacer 1212. The first sub-spacer 1211 and the second sub-spacer 1212 are arranged vertically. The first sub-spacer 1211 can be set as a flat sheet, and the second sub-spacer can also be a flat sheet. In addition, the first sub-spacer 1211 can also be a wavy structure, and the second sub-spacer 1212 can also be a curved arc structure. In the heat exchanger, the first sub-spacer 1211 can be set to control the spacing between adjacent fins 1, and the second sub-spacer 1212 abuts against the fin body 10 of the adjacent fin 1 to limit the position, so that the fin 1 can be effectively and reliably limited to the preset position.

[0036] In some embodiments, as shown in Figures 1 to 10, the extension direction of the first contour line 106 of the spacer 12 is set at an angle to the length direction of the fin body 10, and the angle is an acute angle α, which is greater than 30 degrees and less than 50 degrees. When α is less than 30 degrees or even close to 0 degrees, the heat exchange efficiency of the heat exchanger 1000 will be affected because the fins will block the air flow, thereby reducing the heat exchange capacity of the heat exchanger. Similarly, when the angle α is greater than 50 degrees, especially when it is close to 90 degrees, since the header 2 of the heat exchanger 1000 is vertical or inclined when the heat exchanger is used, the heat exchanger 1000 will be affected. Placed, it means that the fin 1 is placed vertically or nearly vertically. In that case, in the system, when the heat exchanger 1000 is used as a condenser, the condensed water on the heat exchanger 1000 cannot be quickly removed. If the condensed water is not removed in time, the heat exchanger 1000 will easily frost, which will easily affect the use of the heat exchanger. Therefore, when the partition is greater than 30 degrees and less than 50 degrees, during the use of the heat exchanger 1000, various advantages can be combined, and the heat exchange performance of the heat exchanger 1000 is better, thereby improving the heat exchange efficiency of the heat exchanger 1000.

[0037] In some embodiments, as shown in Figures 3, 4, 9 and 10, two spacers 12 are provided around the second through hole 102, and a plane parallel to the length direction of the fin body 10 and perpendicular to the width direction of the fin body 10 is defined as a first plane. In the width direction of the fin body 10, one spacer 12 has a first projection on the first plane 105, and the other of the two spacers 12 has a second projection on the first plane 105. The first projection and the second projection do not overlap at all in the width direction of the fin 1. The second through hole 102 is a circular hole, and the line defining the center of the through hole is the center line. The two spacers 12 are bounded by the center line and are located on both sides of the center line, and the spacers 12 are arranged at an angle. This arrangement is also beneficial for the heat exchange tube 3 to pass through multiple fins 1. The local fins around the second through hole 102 of the fin 1 are subjected to relatively uniform extrusion pressure, and the fin 1 is not prone to falling over.

[0038] In some embodiments, as shown in Figures 3 and 9, the spacer 12 also includes a reinforcing rib 123, which is a convex structure, and the reinforcing rib 123 extends in the length direction of the first sub-spacer 1211. The provision of the reinforcing rib 123 is beneficial to improving the strength of the spacer 12, and can reduce the deformation of the spacer 12, thereby improving the reliability of the fin 1.

[0039] In some embodiments, as shown in Figures 1 to 8, there is a transition portion between the first fixed end 1213 and the first free end 1214 of the spacer 12, and the transition portion 121 includes a first sub-spacer 1211 and a second sub-spacer 1212. The first sub-spacer 1211 is connected to the first fixed end 1213, and the second sub-spacer 1212 is connected to the first free end 1214. The first sub-spacer 1211 is connected to the second sub-spacer 1212. The height dimension of the first sub-spacer 1211 is H, and the length dimension of the second sub-spacer 1212 is L3 (as shown in the figure), 4≤H / L3≤25. In the heat exchanger 1000, within this range, the first sub-spacer 1211 of the spacer 12 can provide support for the adjacent fin 1. On the other hand, when the second sub-spacer 1212 of the spacer 12 abuts against the adjacent fin 1, the contact area between the two adjacent fins 1 can be increased, thereby increasing the effective welding area, thereby effectively improving the reliability of the heat exchanger 1000.

[0040] In some embodiments, as shown in Figures 1 and 2, a heat exchanger 1000 includes a heat exchange tube 3 and two headers 2. One end of the heat exchange tube 3 is directly connected to one header 2, and the other end of the heat exchange tube is directly connected to the other header 2. It can be understood that indirect connection means that the end of the heat exchange tube 3 is connected to the header 2 through other pipes.

[0041] In some embodiments, as shown in Figures 2, 9, and 10, the fin body 10 is further provided with a plurality of fins 13. The plurality of fins 12 have a turbulent effect on the air flow, thereby improving the heat exchange efficiency of the heat exchanger 1000 using the fin 1. In some embodiments, two or more fins are collectively referred to as a fin group. In some cases, as shown in Figure 2, two or more fin groups are provided in the width direction of the fin body 10. The fin group includes a plurality of first fins 131 and a plurality of second fins 132. The plurality of first fins 131 constitute a first fin group, and the plurality of second fins 132 constitute a second fin group. In the air flow direction of the heat exchanger 1000 (as indicated by the arrow in Figure 2), the length of the first fins 131 on the windward side is greater than that of the second fins 132 on the leeward side. In the width direction of the fin 1, the heat exchange area of ​​the first fin group is greater than that of the second fin group, thereby enhancing the turbulence of the air and facilitating the improvement of the heat exchange capacity of the heat exchanger.

[0042] In some embodiments, as shown in FIG11 , a heat exchange system includes a compressor 100, a first heat exchanger 200, a throttling device 300, a second heat exchanger 400, and a reversing valve 500. When the system is in operation, the refrigerant flowing out of the outlet of the compressor 100 flows to the first heat exchanger 200, then flows out of the first heat exchanger 200 through the throttling device 300 into the second heat exchanger 400, then flows out of the second heat exchanger 400 through the reversing valve 500 into the compressor. The reversing valve 500 has two operating states: the first is represented by a solid line, and the second is represented by a dotted line. Therefore, the heat exchange system also has another operating state: the refrigerant flowing out of the outlet of the compressor 100 flows to the second heat exchanger 400, then flows out of the second heat exchanger 400 through the throttling device 300 into the first heat exchanger 200, then flows out of the first heat exchanger 200 through the reversing valve 500, and finally flows into the compressor.

[0043] In some embodiments, such as the heat exchanger 1000 shown in FIG2 , when the heat exchanger 1000 is used as a condenser in the heat exchange system of FIG11 , the air on the windward side of the heat exchanger 1000 has a higher moisture content, and frost will preferentially form on the fins on the windward side. When the center of the heat exchange tube 3 deviates from the center line of the fin 1 and approaches the leeward side, the heat exchange area of ​​the fin 1 on the windward side of the heat exchanger 1000 increases, and thus the frost thickness on the windward side of the heat exchanger 1000 will be reduced, thereby helping to delay the frost time of the heat exchanger and reduce the frost cycle.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0045] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fin, comprising: a fin body, the fin body having a first through hole and a second through hole, the first through hole and the second through hole penetrating the fin body, the hydraulic diameter of the second through hole being larger than the hydraulic diameter of the first through hole, and the first through hole being closer to an edge of the fin body than the second through hole in a width direction of the fin body, the edge of the first through hole being defined as a first edge portion, and the edge of the second through hole being defined as a second edge portion; a spacer, the spacer comprising a first fixed end and a first free end, the first free end being farther from the fin body than the first fixed end, the first fixed end being connected to the first edge portion, and a vertical distance H between the first free end and the fin body; The flange includes a second fixed end and a second free end, the second fixed end is connected to the second edge portion, and the vertical distance between the second free end of the flange and the fin body is h, H≥h.

2. The fin according to claim 1, wherein The fin includes more than two spacers, and the two or more spacers include a first spacer and a second spacer, the first spacer and the second spacer are located on different sides of the flange in the width direction of the fin body, the first fixed end of the first spacer is connected to the first edge portion, the fin body has a first side surface along the thickness direction of the fin body, the first fixed end of the first spacer has a first contour line on the first side surface, the first edge portion includes a second contour line and a third contour line on the first side surface of the fin body, the second contour line is closer to the flange than the third contour line, the second contour line intersects with one end of the first contour line, and the third contour line intersects with the other end of the first contour line intersect, the second contour line intersects with the first contour line at point Q, the first fixed end portion of the second spacer is connected to the other first edge portion, the first fixed end portion of the first spacer has a fourth contour line on the first side, the first edge portion includes a fifth contour line and a sixth contour line on the first side of the fin body, the fifth contour line intersects with one end of the fourth contour line, the sixth contour line intersects with the other end of the fourth contour line, the fifth contour line is closer to the flange than the sixth contour line, the fourth contour line intersects with the fifth contour line at point Q', the vertical distance from point Q to the second edge portion is L1, the vertical distance from point Q' to the second edge portion is L2, L1≤L2.

3. The fin according to claim 2, wherein: The extension direction of the first contour line of at least one of the spacers forms an angle with the length direction of the fin body, and the angle is an acute angle α, 30°<α<50°, and the unit is degree.

4. The fin according to claim 2 or 3, wherein: The vertical distance from point Q to the outer surface of the flange is L1, the inner diameter of the second through hole is D, 0.3<L1 / D<0.7, and / or the vertical distance from point Q' to the outer surface of the flange is L2, the inner diameter of the second through hole is D, 0.3<L2 / D<0.

7.

5. The fin according to claim 2 or 3, wherein: There are two spacers, and a plane parallel to the length direction of the fin body and perpendicular to the width direction of the fin body is defined as a first plane. In the width direction of the fin body, one of the two spacers has a first projection on the first plane, and the other of the two spacers has a second projection on the first plane, and the first projection and the second projection do not overlap at least partially.

6. The fin according to any one of claims 1 to 3, wherein: There is a transition portion between the first fixed end and the first free end of the diaphragm, and the transition portion includes a first sub-diaphragm and a second sub-diaphragm. The first sub-diaphragm is connected to the first fixed end, the second sub-diaphragm is connected to the first free end, and the first sub-diaphragm is connected to the second sub-diaphragm. The height dimension of the first sub-diaphragm is H, and the length dimension of the second sub-diaphragm is L3, 4≤H / L3≤25.

7. The fin according to claim 1, wherein The spacer further includes a reinforcing rib extending from the first fixed end portion of the spacer along the first free end portion of the spacer.

8. A heat exchanger comprising: a first header and a second header; a heat exchange tube, one end of the heat exchange tube being directly or indirectly connected to the first header, and the other end of the heat exchange tube being directly or indirectly connected to the second header; The fin is the fin according to any one of claims 1 to 7, the heat exchange tube passes through the second through hole, there are multiple fins, and the multiple fins are spaced apart in the length direction of the heat exchange tube, and the spacer of one fin is fixedly connected to the fin body of another adjacent fin.

9. The heat exchanger according to claim 8, wherein: The fin body includes a plurality of windows, which include a first window and a second window. The plurality of first windows are defined to form a first window group, and the plurality of second windows are defined to form a second window group. The first window group is located on the windward side of the fin body, and the second window group is located on the leeward side of the fin body. The length dimension of at least one of the first windows is greater than the length dimension of the second window.

10. A heat exchange system comprising a compressor, at least one first heat exchanger, a throttling device and at least one second heat exchanger, wherein the first heat exchanger and / or the second heat exchanger is the heat exchanger according to claim 8 or 9.

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