Heat Exchanger

Abstract

The present invention discloses a heat exchanger, which comprises: flat tubes and fins. The flat tubes are arranged spaced apart from each other along the thickness direction of the flat tubes, and a fluid channel extending along the longitudinal direction of the flat tubes is provided in the flat tubes; the fins are provided between adjacent flat tubes, and a plurality of fins between adjacent flat tubes are arranged spaced apart from each other along the transverse direction of the flat tubes, and each fin extends along the longitudinal direction of the flat tubes, and the fins comprise a flat sheet portion and a positioning flange, and the positioning flange of a fin is connected to the side edge of the flat sheet portion of the fin and extends toward the fin adjacent to the fin, and the flat sheet portion is provided with a plurality of ventilation windows along the longitudinal direction of the flat tubes. According to the heat exchanger of the embodiment of the present invention, condensed water can be discharged quickly.

Description

[0001] This application is a divisional of the application with application date of 2018-12-29, application number of 201811639355.X, and application name of “Heat Exchanger” Technical Field

[0002] The invention relates to the technical field of heat exchange, and in particular to a heat exchanger. Background Art

[0003] In the heat exchanger in the related art, especially the parallel flow multi-channel heat exchanger, the refrigerant flows in the heat exchange tube and exchanges heat with the airflow outside the tube. The heat exchange tube adopts a flat tube design and has multiple parallel flow channels. Corrugated fins are installed between the flat tubes, and louvers are opened on the fins. The structural design of the heat exchanger in the related art is not conducive to the discharge of condensed water, which leads to a decrease in heat exchange performance. Summary of the invention

[0004] The present invention is made based on the inventor's discovery and recognition of the following technical problems and facts.

[0005] In the heat exchanger of the related art, the corrugated fins with shutters are arranged between the flat tubes, and the corrugated fins extend along the length direction of the flat tubes (in other words, the longitudinal direction or length direction of the fins is consistent with the length direction of the flat tubes, and the transverse direction or width direction of the fins is consistent with the width direction of the flat tubes), and are used to exchange heat with the air in the air. Under certain working conditions, the condensed water generated on the air inlet side of the heat exchanger can only be discharged from the surface of the fins, but due to the corrugated structure of the fins, the condensed water remains between the peaks and valleys, which is not conducive to removal and affects the heat exchange performance.

[0006] To this end, an object of the present invention is to provide a heat exchanger that can accelerate the discharge of condensed water when there is condensed water on the upper surface of the heat exchanger and reduce the impact on heat exchange performance.

[0007] A heat exchanger according to an embodiment of the present invention comprises: flat tubes and fins. The flat tubes are arranged spaced apart from each other along the thickness direction of the flat tubes, and a fluid channel extending along the longitudinal direction of the flat tubes is provided in the flat tubes; the fins are provided between adjacent flat tubes, and a plurality of fins between adjacent flat tubes are spaced apart from each other along the transverse direction of the flat tubes, and each fin extends along the longitudinal direction of the flat tubes, and the fins comprise a flat sheet portion and a positioning flange, the positioning flange of a fin is connected to the side edge of the flat sheet portion of the fin and extends toward the fin adjacent to the fin, and the flat sheet portion is provided with a plurality of ventilation windows along the longitudinal direction of the flat tubes.

[0008] According to the heat exchanger of the embodiment of the present invention, condensed water can be discharged quickly, and the fluid on the outside of the flat tube can better contact with the flat tube, fins and other structures for heat exchange, thereby effectively improving the heat exchange efficiency of the heat exchanger and the discharge efficiency of condensed water.

[0009] In addition, the heat exchanger according to the above embodiment of the present invention may also have the following additional technical features:

[0010] In some embodiments, the positioning flange is provided with a first step portion, the free end of the positioning flange of one fin abuts against the vertical surface of the first step portion of the positioning flange of an adjacent fin, and there is a gap between the first step portion and the flat tube, the length of the gap in the thickness direction of the flat tube is b, the thickness of the flat portion of the fin is t, and t / b is not greater than 0.95.

[0011] In some embodiments, c / t is in the range of 1 to 5.

[0012] In some embodiments, a length of the first step portion in the transverse direction of the flat tube is c, wherein c / t is in the range of 1 to 5.

[0013] In some embodiments, the flat tube has a main surface, and a plurality of bosses are provided on the main surface. The plurality of bosses are arranged at intervals along the transverse direction of the flat tube, and each of the bosses extends along the longitudinal direction of the flat tube. The longitudinal side of the fin is fitted between two adjacent bosses, and the distance between the two adjacent bosses in the transverse direction of the flat tube is m, the thickness of the boss in the transverse direction of the flat tube is e, and the thickness of the flat portion of the fin is t, wherein: 0.5≤t / m≤0.95; and / or 0.2≤m / (2e+m)<1.

[0014] In some embodiments, the height of the boss in the thickness direction of the flat tube is h, and the dimension of the fin between the two flat tubes in the thickness direction of the flat tube is TP, wherein 0 <h / TP≤0.3。

[0015] In some embodiments, the cross-section of the boss along the thickness direction of the flat tube is triangular, rectangular or trapezoidal.

[0016] In some embodiments, the flat tube has a main surface, a plurality of second step portions are provided on the main surface, the second step portion includes a first surface, a second surface, and a second vertical surface, the first surface and the second surface are both perpendicular to the thickness direction of the flat tube, the second vertical surface is connected between the first surface and the second surface, the distance between the first surface and the second surface in the thickness direction of the flat tube is g, the thickness of the fin flat portion is t, 0.2≤g / t≤2.

[0017] In some embodiments, an opening is provided on the positioning flange along the longitudinal direction of the flat tube, the length of the positioning flange between adjacent openings along the longitudinal direction of the flat tube is u, and the length of the opening along the longitudinal direction of the flat tube is v, wherein 0.1≤u / v≤10.

[0018] In some embodiments, the free end of the positioning flange is provided with a positioning piece, and the positioning piece extends away from the free end of the positioning flange along the thickness direction of the flat tube, and the extension distance is k. The thickness of the fin flat sheet portion is t, wherein 1 <k / t≤10。

[0019] In some embodiments, the ventilation window includes a window blade connected to the flat sheet portion and an opening located on the flat sheet portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a heat exchanger according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 A schematic diagram of the heat exchanger fins is shown in FIG.

[0022] Figure 3 yes Figure 1 A schematic diagram of the heat exchanger fins shown in another direction.

[0023] Figure 4 yes Figure 3 Schematic diagram of middle section II.

[0024] Figure 5 yes Figure 1 Schematic diagram of the assembly method of the heat exchanger shown in FIG.

[0025] Figure 6 is a schematic diagram of a heat exchanger according to another embodiment of the present invention.

[0026] Figure 7 yes Figure 6 A partial enlarged schematic diagram of the middle circle II area.

[0027] Figure 8 It is a schematic diagram of yet another embodiment of the present invention.

[0028] Fig. 9 yes Figure 8 Schematic diagram along the CC direction.

[0029] Fig.10 and Fig.11 yes Figure 8 A schematic diagram of the heat exchanger fins is shown.

[0030] Fig.12 yes Fig.11 Projection view along direction BB.

[0031] Fig.13 yes Fig.11 Schematic diagram of the middle section III-III.

[0032] Fig.14It is a schematic diagram of yet another embodiment of the present invention.

[0033] Fig.15 yes Fig.14 Schematic diagram of the assembly method of the heat exchanger shown in FIG.

[0034] Fig.16 yes Fig.14 Schematic diagram of the medium flat tube.

[0035] Fig.17 and Fig.18 yes Fig.14 Schematic diagram of the groove shapes of different embodiments.

[0036] Fig.19 yes Fig.14 Schematic diagram of the fins in the heat exchanger shown in FIG.

[0037] Fig. 20 is a schematic diagram of yet another embodiment of the present invention.

[0038] Fig.21 yes Fig. 20 Schematic diagram of the assembly method of the heat exchanger shown in FIG.

[0039] Fig. 22 yes Fig. 20 Schematic diagram of the medium flat tube.

[0040] Fig.23 Schematic diagram of a heat exchanger according to another embodiment of the present invention.

[0041] Fig.24 and Fig.26 yes Fig.23 Schematic diagram of two different types of fins

[0042] Fig.25 yes Fig.24 Side view of the mid-fin.

[0043] Fig. 27 Schematic diagram of a heat exchanger according to another embodiment of the present invention.

[0044] Fig.28 yes Fig. 27 Schematic diagram of the assembly method of the heat exchanger.

[0045] Fig.29 yes Fig. 27 Partial schematic diagram of the heat exchanger.

[0046] Fig.30 yes Fig. 27 Schematic diagram of the fins of the heat exchanger.

[0047] Fig.31 Schematic diagram of a heat exchanger according to another embodiment of the present invention.

[0048] Figure 32-Figure 34 yes Fig.31 Schematic diagram of the fins in the heat exchanger in different orientations.

[0049] Fig.35 It is a schematic diagram comparing the test results of the heat exchanger in the embodiment of the present invention and the heat exchanger in the related art.

[0050] Figure numerals: heat exchanger 100, flat tube 1, fluid channel 101, fin 2, thickness direction AA of flat tube 1, longitudinal direction BB of flat tube 1, transverse direction CC of flat tube 1, flat sheet portion 21, ventilation window 201, the spacing of ventilation windows 201 is LP, the opening angle of ventilation window 201 is LA, window blade 211, positioning flange 22, first step portion 221, first step surface 221a, first vertical surface 221c, second step surface 221b, connecting hole 202, connecting rod 203, main surface 102 of flat tube, groove 103, second step portion 104, first surface 104a, second surface 104b, second vertical surface 104c, connecting plate 23, connecting strip 24, folded edge 25, positioning sheet 26. DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0052] Combination Figures 1 to 4 The heat exchanger 100 according to the embodiment of the present invention includes a flat tube 1 and a fin 2. The fluid inside and outside the flat tube 1 can exchange heat through the wall of the flat tube 1, the fin 2 and other structures.

[0053] The heat exchanger 100 includes at least two flat tubes 1, and the flat tubes 1 are connected along the thickness direction of the flat tubes 1 (refer to Figure 1 The flat tube 1 is provided with a longitudinal direction (refer to the direction AA shown in FIG. Figure 1 The fluid channel 101 extends in the direction BB shown in the figure, and the fluid in the flat tube 1 can flow through the fluid channel 101. The fins 2 are arranged between adjacent flat tubes 1, and the plurality of fins 2 between adjacent flat tubes 1 extend in the transverse direction of the flat tube 1 (refer to Figure 1 The fins 2 are arranged in a spaced relationship from each other (in the direction shown in FIG), and fluid (such as gas to be heat exchanged or condensed water, etc.) can flow through the gaps between the fins 2. Each fin 2 extends along the longitudinal direction of the flat tube 1.

[0054] According to the heat exchanger 100 of the embodiment of the present invention, both the gaps between the fins 2 and the louvers can be used as circulation channels for air or condensed water, and the condensed water can be discharged quickly without accumulating on the flat tubes 1 and the fins 2. The fluid on the outside of the flat tubes 1 can better contact with the flat tubes 1, fins 2 and other structures to exchange heat, thereby effectively improving the heat exchange efficiency of the heat exchanger 100 and the discharge efficiency of condensed water.

[0055] Optionally, the plurality of fins are parallel to each other, and the fin 2 is provided with a ventilation window 201 penetrating along the thickness direction of the fin 2 , and fluid (such as gas to be heat exchanged or condensed water, etc.) can also flow through the ventilation window 201 .

[0056] In the present invention, the heat exchanger 100 can be configured such that the longitudinal direction of the flat tube 1 extends in the up-down direction, and the air circulation direction can be configured to be in the transverse direction of the flat tube 1. When the heat exchanger 100 performs heat exchange (especially heat exchange of the air outside the flat tube 1 by the fluid inside the flat tube 1), the fluid outside the flat tube 1 can circulate in the transverse direction of the flat tube 1, wherein at least a portion of the fluid outside the flat tube 1 is sent to the fin 2 (or the space between the flat tubes 1) in the transverse direction of the flat tube 1, and the fluid sent to the fin 2 will pass through the ventilation window 201 on the fin 2 when passing through the fin 2, and then pass through a plurality of fins 2 and be sent out from between adjacent flat tubes 1.

[0057] For example, when the heat exchanger 100 is used to cool the air outside the flat tube 1, condensation will occur when the airflow passes through the fins 2. That is, water vapor in the air will condense when passing through the fins 2 with a lower temperature. After condensation, the water vapor forms water droplets and condenses on the fins 2, the flat tube 1 and other structures, thereby generating condensed water. Since the longitudinal direction of the flat tube 1 extends in the up-and-down direction, and the fins 2 extend along the longitudinal direction of the flat tube 1, the condensed water will flow along the longitudinal direction of the flat tube 1 under the action of gravity, and the condensed water on the flat tube 1, the fins 2 and other structures will be quickly discharged, thereby achieving the purpose of quickly discharging the condensed water.

[0058] In addition, since the condensed water is discharged quickly, the heat absorbed or condensed by the condensed water from the fluid inside the flat tube 1 can be reduced to a certain extent, and the heat or cold loss of the fluid inside the flat tube 1 can be reduced, thereby effectively improving the heat exchange rate and heat exchange rate. Optionally, when cooling is performed through the heat exchanger 100, since there is less condensed water (or no condensed water) remaining on the heat exchanger 100, the icing problem caused by the accumulation of condensed water is effectively reduced, thereby avoiding the problem of low heat exchange efficiency due to icing of the heat exchanger 100, and improving the energy efficiency of the heat exchanger 100.

[0059] Optionally, in the present invention, the transverse direction and the longitudinal direction of the flat tube 1 are both perpendicular to the thickness direction of the flat tube 1 . Preferably, the transverse direction and the longitudinal direction of the flat tube 1 are also perpendicular to each other.

[0060] Optionally, the longitudinal direction of the flat tube 1 is the extension direction of the fluid channel 101 or the length direction of the flat tube 1, and the length direction of the fin 2 is consistent with the length direction of the flat tube 1 or the longitudinal direction of the flat tube 1; the transverse direction of the flat tube 1 is perpendicular to the fluid channel 101 and the thickness direction of the flat tube 1, or the transverse direction of the flat tube 1 is the width direction of the flat tube 1, and the fins 2 are spaced apart from each other along the transverse direction of the flat tube 1, that is, the fins 2 are spaced apart from each other along the width direction of the flat tube 1.

[0061] The transverse direction of the flat tube is the width direction of the flat tube, and the thickness direction of the fin 2 is consistent with the transverse direction of the flat tube; the longitudinal direction of the fin is consistent with the thickness direction of the flat tube.

[0062] In addition, since the extending direction of the fins 2 is the same as the extending direction of the fluid channel 101 (both extend along the longitudinal direction of the flat tube 1), when the fluid in the flat tube 1 passes through the fluid channel 101, each of the multiple fins 2 has the same heat conduction effect. Figure 1 When the fluid in the flat tube 1 flows along the direction BB, in the projection along the thickness direction of the flat tube 1, the extension direction of each fin 2 is consistent with the extension direction of the fluid channel 101. At this time, the condensation and heat absorbed by each fin 2 are substantially the same, so that uniform heat exchange can be performed.

[0063] For ease of understanding, taking the fins extending in the transverse direction of the flat tube as a counterexample, multiple fins will be arranged in the longitudinal direction of the flat tube. In the fluid channel, the fluid flows in the longitudinal direction, and the fluid will gradually exchange heat with multiple fins. Since the fluid is constantly exchanging heat during the circulation process, the heat or cold of the fluid will decrease downstream in the flow direction of the fluid. The fins that exchange heat with the fluid first will bear more heat or cold, while the fins that exchange heat with the downstream fluid will bear less heat or condensation. At this time, the heat exchange effect of multiple fins will be uneven.

[0064] In addition, the fins 2 of the heat exchanger 100 of the present invention can be arranged in parallel in multiple pieces in the transverse direction of the flat tube 1, and the thickness direction of the fin 2 is consistent with the width direction of the flat tube 1. The fins 2 are formed by stamping or other methods. The assembly process of the heat exchanger 100 can be to push the fins 2 one by one between the flat tubes 1 and fix them before brazing.

[0065] Several structural forms of the fin 2 are described below.

[0066] Example 1

[0067] like Figure 4, the spacing between adjacent ventilation windows 201 on a single fin is LP, that is, the spacing between two adjacent ventilation windows 201 on a single fin 2 is LP. In addition, the opening angle of the ventilation window 201 is LA, wherein an inclined window blade 211 is provided at the ventilation window 201, and the inclination angle of the window blade 211 relative to the fin 2 may be less than 90°, or in other words, the window blade 211 is inclined with respect to the normal direction of the fin 2 (the transverse direction of the flat tube 1). Specifically, the opening angle LA of the ventilation window 201 refers to the angle between the window blade 211 and the plane orthogonal to the plate body of the fin 2 (or in other words, Figure 4 The included angle between the longitudinal direction of the middle flat tube 1 is LA, where 0.5≤LP≤5 (unit: mm), 45°≤LA≤85°.

[0068] Optionally, the value of LP may also be set to be less than 0.5 mm or greater than 5 mm. For example, the value of LP may be set to 0.3 mm, 0.8 mm, 3 mm, 10 mm, etc.

[0069] Optionally, the value of LA may also be set to be less than 45° or greater than 85°. For example, the value of LA may be set to 5°, 25°, 60°, 75°, 88°, and so on.

[0070] The LP value and the LA value can be adjusted according to the actual usage. By limiting the LP value and the LA value, the heat exchange area between the fin 2 and the air can be increased through the window blade 211 (more fluid will contact the fin 2), avoiding the problem that the LP value is set too small to affect the structural strength of the fin 2, the LP value is set too large to affect the ventilation volume, the LA value is set too small to affect the contact area between the fin 2 and the air, and the LA value is set too large to affect the ventilation volume. While ensuring good ventilation volume, the ventilation volume and heat exchange efficiency are effectively improved.

[0071] In addition, the spacing between the opposite ventilation windows 201 on two adjacent fins 2 in the transverse direction of the flat tube 1 can also be set to LP (or other spacings), that is, the spacing between two adjacent fins 2 can be LP (or other spacings).

[0072] In the present invention, the gap between two adjacent flat tubes 1 may be in the range of 5 mm to 20 mm.

[0073] Example 1 can be applied to other embodiments of the present invention.

[0074] Example 2

[0075] Combination Figures 1 to 4 The fin 2 in the present invention can be made of a flat sheet portion 21.

[0076] The ventilation window 201 is disposed on the flat sheet portion 21 , and the ventilation window 201 includes a window blade 211 connected to the flat sheet portion.

[0077] The ventilating window 201 can be made by punching a part of the flat sheet portion 21 to form a window blade 211 connected to the flat sheet portion 21. That is, a part of the flat sheet portion 21 is punched to punch out a channel on the flat sheet portion 21, and the punched part is formed into the window blade 211, and the window blade 211 can be inclined to the flat sheet portion 21 and the normal direction of the flat sheet portion 21.

[0078] The stamping here does not necessarily refer to a stamping process, and the fin 2 and the window blade 211 structure can also be formed by bending, integral production, etc. Of course, the window blade 211 can also be formed by a stamping process.

[0079] The ventilation window comprises a window blade connected to a flat sheet portion and an opening located on the flat sheet portion.

[0080] Example 2 can be applied to other embodiments of the present invention.

[0081] Example 3

[0082] Combination Figures 1 to 5 The fin 2 includes a positioning flange 22. Optionally, the fin 2 includes a flat sheet portion, and the longitudinal side edge of the flat sheet portion is connected to the positioning flange 22.

[0083] The longitudinal side of the flat sheet portion refers to the edge of at least one of the two opposite sides along the thickness direction of the flat tube on the flat sheet portion, or in other words, the edge of the flat sheet portion parallel to the longitudinal direction of the flat tube. In addition, the longitudinal direction of the fin 2 (or the longitudinal direction of the flat sheet portion) is consistent with the thickness direction of the flat tube 1, the length direction of the fin 2 (or the transverse direction of the flat sheet portion) is consistent with the longitudinal direction of the flat tube 1, and the thickness direction of the fin 2 (or the thickness direction of the flat sheet portion) is consistent with the transverse direction of the flat tube 1.

[0084] The positioning flange 22 can improve the structural strength of the fin 2, and can also increase the contact area between the fin 2 and the flat tube 1. While improving the efficiency of heat exchange and heat conduction, if the fin 2 and the flat tube 1 need to be connected by welding, the positioning flange 22 can also improve the connection strength between the fin 2 and the flat tube 1. In fact, even if the fin 2 and the flat tube 1 are not connected by welding, the positioning flange 22 can also improve the matching strength between the fin 2 and the flat tube 1.

[0085] like Figure 2 Optionally, the positioning flange 22 extends along the thickness direction of the flat sheet portion (or the transverse direction CC of the flat tube).

[0086] The positioning flange of one fin is connected to the side edge of the flat sheet portion of the one fin and extends toward the fin adjacent to the one fin. The flat sheet portion is provided with a plurality of ventilation windows along the longitudinal direction of the flat tube.

[0087] In addition, the positioning flange of one fin is connected to the side edge of the flat sheet portion of the one fin and extends toward the fin adjacent to the one fin.

[0088] like Figure 2 Optionally, the positioning flanges 22 are provided on the longitudinal side edges of the flat sheet portion on both sides of the longitudinal direction of the fin 2 (or the thickness direction AA of the flat tube).

[0089] like Figure 2 Optionally, the positioning flanges 22 on both sides of the flat sheet portion extend toward the same side of the fin 2 .

[0090] like Figure 2 Optionally, the positioning flange 22 is located between two adjacent fins, and one end is connected to the side edge of the flat sheet portion of the fin. In other words, the positioning flange 22 is located between the flat sheet portions of two adjacent fins. In other words, the gap between two adjacent fins 2 is limited by the positioning flange 22 on the fin 2, so that the assembly can be performed effectively and quickly during the assembly process.

[0091] Among the two adjacent fins 2 , the positioning flange 22 of one fin 2 may abut against the flat sheet portion 21 of the other fin 2 , or the positioning flange 22 of one fin 2 may abut against the positioning flange 22 of the other fin 2 .

[0092] In addition, among two adjacent fins 2, the positioning flange 22 of one fin 2 may abut against the positioning flange 22 of the other fin 2 along the thickness direction of the flat tube 1; or the positioning flange 22 of one fin 2 may abut against the other fin 2 along the transverse direction of the flat tube 1.

[0093] Since the positioning flange 22 abuts against another fin 2, the structural strength between the fins 2 and the heat exchanger 100 can be improved to a certain extent, thereby increasing the service life of the heat exchanger 100 and maintaining good stability during the falling process of the heat exchanger 100.

[0094] like Figure 5 Optionally, the longitudinal side edges of each fin 2 can be placed against the flat tube 1. Similarly, the longitudinal flanges of multiple fins 2 can be stacked on the flat tube 1 in sequence along the thickness direction of the flat tube 1. At this time, multiple fins 2 can be arranged in a nested form.

[0095] Among them, combined Figure 2 and Figure 5In the present invention, there are N fins 2 between two adjacent flat tubes 1, and the width of the positioning flange 22 (the dimension along the transverse direction of the flat tube 1) is FP, wherein the width of the positioning flange 22 can be the same as the spacing between the fins 2 of the flat tube 1, and the width of the flat tube 1 (the dimension along the transverse direction) can be set to N×FP.

[0096] like Figure 6 and Figure 7 Optionally, a first step portion 221 may be provided on the positioning flange 22, and the free end of the positioning flange 22 on one fin 2 abuts against the vertical surface of the first step portion 221 of the positioning flange on the adjacent fin.

[0097] Among them, the inner side surface or outer side surface of the positioning flange 22 may include a first step surface 221a, a second step surface 221b and a first vertical surface 221c. There is a drop between the first step surface 221a and the second step surface 221b in the thickness direction of the flat tube 1, and the first vertical surface 221c is connected between the first step surface 221a and the second step surface 221b. The first step surface 221a, the first vertical surface 221c and the second step surface 221b are connected in sequence in the transverse direction of the flat tube 1. The first step surface 221a and the first vertical surface 221c are combined into a first step portion 221, and the first vertical surface 221c will form the vertical surface of the positioning flange.

[0098] Optionally, in the fin 2, the flat sheet portion 21 is perpendicular to the transverse direction of the flat tube 1, and the positioning flange 22 is parallel to the transverse direction of the flat tube 1. At this time, an angle will be formed between the positioning flange 22 and the flat sheet portion 21, wherein the surface of the positioning flange 22 that is away from the flat sheet portion 21 along the thickness direction of the flat tube 1 is the outer side surface of the positioning flange 22, and the surface of the positioning flange 22 that is opposite to the outer side surface of the positioning flange 22 in the thickness direction of the flat tube 1 is the inner side surface of the positioning flange 22.

[0099] For example, combining Figure 6 and Figure 7 The outer side of the positioning flange 22 faces the flat tube 1, and the outer side of the positioning flange 22 includes a first step surface 221a, a first vertical surface 221c, and a second step surface 221b that are sequentially connected along the transverse direction of the flat tube 1, wherein the second step surface 221b is against the flat tube 1, and there is a gap between the first step surface 221a and the flat tube 1, and the second step surface 221b is closer to the edge of the free end of the positioning flange 22 relative to the first step surface 221a. The free end of the positioning flange 22 of one fin 2 will extend between the first step surface 221a of the positioning flange 22 of another fin 2 and the flat tube 1 and abut against the first vertical surface 221c (i.e., vertical surface).

[0100] Optionally, the height of the first step portion 221 may be equal to the thickness of the positioning flange 22, and the height of the first step portion 221 is the height difference between the first step surface 221a and the second step surface 221b in the thickness direction of the flat tube 1. In this case, the two adjacent fins 2 and the fins 2 and the flat tube 1 will be more stably connected, thereby effectively improving the heat exchange efficiency of the flat tube 1.

[0101] Specifically, referring to the above example, Figure 6 and Figure 7 The first step surface 221a is separated from the surface of the flat tube 1, and the second step surface 221b is close to the surface of the flat tube 1. Therefore, the height of the first step portion 221 is the gap between the first step surface 221a and the surface of the flat tube 1. At this time, the positioning flange 22 of the other fin 2 can be inserted between the first step surface 221a and the flat tube 1, and the free end of the positioning flange 22 of the other fin 2 can be close to the surface and the vertical surface of the flat tube 1.

[0102] In other words, a first step portion is provided at the positioning flange 22 of the fin 2 for clamping and positioning the plurality of fins 2 in the transverse direction of the flat tube 1 , thereby effectively controlling the spacing between the fins 2 .

[0103] Optionally, the thickness of the flat fin portion is t, and the depth of the first step portion is b, wherein t / b is not greater than 0.95.

[0104] The depth of the first step portion refers to: the width of the facade; or the size of the facade in the thickness direction of the flat tube 1; or the distance between the first step surface and the second step surface in the thickness direction of the flat tube; or the gap between the first step surface 221a and the flat tube; or there is a gap between the first step portion and the flat tube, and the length of the gap in the thickness direction of the flat tube.

[0105] Optionally, the width of the first step portion is c, wherein c / t is in the range of 1 to 5.

[0106] The width of the first step portion refers to: the length of the first step surface 221a in the transverse direction of the flat tube 1; or the length of the first step portion in the transverse direction of the flat tube.

[0107] In addition, the height of the first step portion 221 in the present invention may also be different from the thickness of the positioning flange 22, for example, the height of the first step portion 221 is greater than or less than the thickness of the positioning flange 22. Optionally, when the height of the first step portion 221 is large enough, the positioning flanges 22 of multiple fins 2 may be placed against the vertical surface of the positioning flange 22 of one fin 2.

[0108] Optionally, the positioning flange 22 includes a first branch, a second branch and a third branch, the first branch is connected to the flat sheet portion, and the first branch, the second branch and the third branch are connected in sequence along the transverse direction of the flat tube, the surface of the first branch facing the flat tube is a first step surface, the surface of the third branch facing the flat tube is a second step surface, and the surface of the second branch connecting the first step surface and the second step surface is a first vertical surface.

[0109] Optionally, the first step surface 211 a and the first vertical surface 221 c are connected to form a notch located at the connection between the flat sheet portion 21 and the positioning flange 22 , and the notch is concave in a direction away from the flat tube 1 .

[0110] Example 4

[0111] Combination Figures 8 to 13 At least two fins 2 are provided with connection holes 202, and the multiple fins 2 are connected together by connecting rods 203 passing through the connection holes 202. That is, the multiple fins 2 are connected together by connecting rods 203. Embodiment 4 can be applied to other embodiments of the present invention. Optionally, the connecting pipe 203 can be a bolt.

[0112] Specifically, before the fins 2 are installed between the flat tubes 1, the multiple fins 2 can be connected and fastened together by the connecting rod 203, and then the multiple fins 2 connected as one can be installed between the flat tubes 1; similarly, after the multiple fins 2 are installed between the flat tubes 1, the multiple fins 2 can be fastened by the connecting rod 203. Optionally, when the first step 221 is provided on the surface of the flat tube 1 and the positioning structure is provided on the fin 2, after the multiple fins 2 are installed and connected by the connecting rod 203, the structural strength of the cooperation between the flat tube 1 and the fin 2 can be effectively improved.

[0113] A small hole is opened in the middle of the fin 2, and the fins 2 between the two flat tubes 1 can be connected by a connecting rod 203 to form a group, and then installed between the two flat tubes 1. This structure can facilitate the collection and assembly of the fins 2 and improve production efficiency.

[0114] Among them, combined Fig.11 and Fig.12 In the present invention, the width dimension of the fin 2 (the dimension of the fin 2 between two adjacent flat tubes in the thickness direction of the flat tube 1) can be set as TP. The flat tube 1 is provided with a positioning block to set the connecting hole 202, that is, the connecting hole 202 is provided on the positioning block, wherein the minimum dimension of the periphery of the positioning block relative to the center of the connecting hole 202 is a, and a / TP can be in the range of 0.3 to 0.8. In addition, the aperture of the connecting hole 202 can be d, and d / a can be set in the range of 0.5 to 0.97. Thus, the structural strength of the positioning block and the connecting hole 202 can be effectively guaranteed.

[0115] Of course, in the present invention, the multiple fins 2 may be connected together by other structures, and the connection structure for connecting the multiple fins 2 may not be provided.

[0116] Embodiment 5,

[0117] Combination Figure 14-Figure 19 A groove 103 is provided on the main surface 102 of the flat tube. The groove 103 extends along the longitudinal direction of the flat tube. The longitudinal side edge of the fin 2 is fitted in the groove 103 .

[0118] The flat tube 102 may have one main surface or two opposite main surfaces. In other words, at least one of the two opposite surfaces on the flat tube in the thickness direction of the flat tube is a main surface.

[0119] Specifically, the flat tube has a main surface 102, which is a plane defined by the width direction and the length direction. Each flat tube has two main surfaces opposite to each other in the thickness direction of the flat tube. The fin 2 is arranged between the main surfaces of adjacent flat tubes and connected to or opposite to the main surfaces of the flat tubes. In other words, in two adjacent flat tubes 1, the main surfaces 102 of the two flat tubes are opposite to each other. Each flat tube 1 can have multiple main surfaces. For example, in three adjacent flat tubes 1 along the thickness direction of the flat tube 1, the two side surfaces of the flat tube 1 located in the middle are respectively opposite to the flat tubes located on both sides. Therefore, the flat tube located in the middle will have two main surfaces. A groove 103 is arranged on the main surface 102 of the flat tube. The groove 103 on the main surface of the flat tube 1 can extend along the longitudinal direction of the flat tube 1. During the assembly process, the fin 2 can use the groove 103 on the main surface of the flat tube 1 as a guide groove, so that the longitudinal side of the fin 2 is inserted into the groove 103 on the main surface of the flat tube 1 to position the flat tube 1.

[0120] In addition, in order to unify the flat tube structure and facilitate the production and manufacturing of the flat tube, grooves can also be set on the surface of the flat tube not opposite to the fins, that is, grooves are set on both sides of the flat tube along the thickness direction.

[0121] The groove 103 can mainly locate the free end of the flat tube 1 in the transverse direction of the flat tube 1, and the freedom of the fin 2 in the longitudinal direction of the flat tube 1 can be achieved in different ways, for example, the fin 2 and the groove 103 are set in the form of interference fit; the fin 2 and the flat tube 1 are welded; a positioning structure is set on the flat tube 1; a positioning structure is set on the fin 2, etc. In the present invention, the positioning between the flat tube 1 and the fin 2 can also adopt other positioning forms, which will not be repeated here.

[0122] In addition, according to the requirements of actual use, the fin 2 may be simply inserted into the groove 103 on the main surface of the flat tube 1 without performing other positioning.

[0123] A plurality of bosses are arranged at intervals along the transverse direction of the flat tube, and each boss extends along the longitudinal direction of the flat tube, and the longitudinal side edges of the fins are fitted between two adjacent bosses.

[0124] Combination Figure 14-Figure 19 The groove 103 can be formed by a part of the main surface 102 of the flat tube being recessed, or a boss can be set on the main surface 102 of the flat tube, and a groove 103 is formed between two adjacent bosses. During assembly, the fin 2 is inserted into the groove 103 from one side of the longitudinal direction of the flat tube 1 to form a heat exchanger unit. In this structure, each fin 2 is independent of each other, and each fin 2 can have a different window structure. The convex structure on the flat tube 1 can be set to a triangle, rectangle, etc. Fig.17 and Fig.18 , the width dimension of the groove 103 (the dimension of the groove 103 along the transverse direction of the flat tube 1, or the distance between two adjacent bosses in the transverse direction of the flat tube) is m. The width of the boss (or the thickness of the boss in the transverse direction of the flat tube) is e, where the width and the gap both refer to the dimension along the width direction of the flat tube. Optionally, the two bosses can have the same width. The thickness of the flat sheet portion of the fin 2 is t, where: 0.5≤t / m≤0.95; 0.2≤m / (2e+m)<1;

[0125] The height of the boss in the thickness direction of the flat tube is h, and the width dimension of the fin 2 (the dimension of the fin 2 between two adjacent flat tubes in the thickness direction of the flat tube 1) can be set to TP, where 0 <h / TP≤0.3。

[0126] The cross section of the boss along the thickness direction of the flat tube is triangular, rectangular or trapezoidal.

[0127] Among them, refer to Fig.18 When the cross-sectional shape of the boss is a triangle, the cross-sectional shape of the boss includes a first side and a second side, the first side is perpendicular to the main surface 102 of the flat tube, the second side extends obliquely relative to the main surface 102 of the flat tube, and the second side respectively connects the end points of the first side and the main surface 102 of the flat tube, thereby forming a triangular shape, the groove 103 is located between the first sides of the two bosses, and the second side on the cross-sectional shape of the boss is located outside the groove 103.

[0128] Among them, refer to Fig.17 In addition, the cross section of the boss can also be rectangular, other polygonal, circular, elliptical, etc. Among them, the cross section is a plane perpendicular to the longitudinal direction of the flat tube.

[0129] Example 6

[0130] Combination Figure 20-Figure 22A plurality of second step portions 104 are provided on the main surface 102 of the flat tube, and the heights of at least two adjacent fins are different. The fin 2 includes a flat portion and a positioning flange 22. At least a portion of the positioning flange 22 contacts the platform surface of the second step portion 104, and at least a portion of the side edge of the fin 2 abuts against the vertical surface of the second step portion 104.

[0131] The main surface 102 of the flat tube is as described above, that is, the flat tube 102 may have one main surface or two opposite main surfaces. In other words, at least one of the two opposite surfaces on the flat tube in the thickness direction of the flat tube is a main surface.

[0132] Among them, the main surface 102 of the flat tube is as described above, and the second step portion 104 on the main surface 102 of the flat tube may include a first surface 104a, a second surface 104b and a second vertical surface 104c. The first surface 104a and the second surface 104b are both perpendicular to the thickness direction of the flat tube 1, and the first surface 104a and the second surface 104b are not on the same surface, that is, there is a drop between the first surface 104a and the second surface 104b in the thickness direction of the flat tube 1, and the second vertical surface 104c is connected to the first surface 104a and the second surface 104b. At this time, the second vertical surface 104c will be formed as the vertical surface of the second step portion 104, and the one of the first surface 104a and the second surface 104b with a lower height relative to the central plane of the flat tube perpendicular to the thickness direction of the flat tube forms the platform surface of the second step portion 104.

[0133] During the assembly process, the positioning flange 22 on the fin 2 will cooperate with the second step portion 104, wherein the positioning flange 22 on the fin 2 can be abutted against the aforementioned first surface 104a or second surface 104b, and the free end or fixed end of the positioning flange 22 can be against the vertical surface of the positioning connection. The fixed end of the positioning flange 22 is connected to the longitudinal side of the fin 2, and the free end of the positioning flange 22 is away from the longitudinal side of the fin 2.

[0134] In addition, in the present invention, the second step portion 104 matched with the multiple fins 2 can be configured as a multi-level second step portion 211 arranged in sequence, wherein the multi-level second step portion 211 can be configured to gradually decrease, gradually increase, first increase and then decrease, first decrease and then increase, etc. along the transverse direction of the flat tube 1.

[0135] Alternatively, if Fig. 22, the thickness of each positioning flange 22 is the same as the height of the vertical surface of the second step portion 104 corresponding to the positioning flange 22. Among them, the height of the vertical surface refers to the dimension along the thickness direction of the flat tube, which can effectively position the fin 2, while reducing the impact on the structural strength, wall thickness, heat exchange performance, etc. of the flat tube 1. In particular, for the aforementioned multi-level second step portion 211, it will not greatly affect the wall thickness of the flat tube 1. In addition, when the height of the second step portion 211 is the same as the thickness of the positioning flange 22, it is convenient to position the fin 2.

[0136] Of course, the height of the second step portion 104 in the present invention may also be different from the thickness of the positioning flange 22. For example, the height of the second step portion 104 is set to be greater than the thickness of the positioning flange 22; or the height of the second step portion 104 is set to be less than the thickness of the positioning flange 22.

[0137] The height of the second step portion 211 refers to the height difference between the first surface 104a and the second surface 104b. In addition, relative to the center plane perpendicular to the thickness direction of the flat tube 1, the first surface 104a may be lower than the second surface 104b, or the first surface 104a may be higher than the second surface 104b.

[0138] Optionally, among two adjacent fins 2, the positioning flange 22 of the longitudinal side of one fin 2 contacts the other fin 2. Thus, multiple fins 2 can be contacted for heat exchange, further effectively improving the heat exchange efficiency of the heat exchanger 100.

[0139] like Fig. 22 , there is a second step 104 on the surface of the flat tube 1, which is used to position the fin 2. During installation, the fins 2 are pushed in one by one from both sides of the flat tube 1 (along the transverse direction of the flat tube 1) and positioned by the second step 211 on the flat tube 1. The width of the fins 2 decreases from both ends to the middle of the flat tube 1, and the width of adjacent fins 2 differs by 2g (where g is the height of each second step 211, or g is the distance between the first surface and the second surface in the thickness direction of the flat tube), and the thickness of the flat fin portion is t. This structure can fix the position of the fin 2 on the one hand, and on the other hand, it can improve the strength of the flat tube 1 and extend its service life. Among them, 0.2≤g / t≤2.

[0140] Example 7

[0141] Combination Figure 23 to Figure 26 At least two fins 2 between adjacent flat tubes 1 are connected at the transverse edges of the fins 2 by a connecting plate extending in the transverse direction of the fins.

[0142] Optionally, the connecting plate is provided with a plurality of connecting strips, which are arranged at intervals along the thickness direction of the flat tube. That is, the two side edges of adjacent fins 2 along the transverse direction of the fins (longitudinal direction of the flat tube) are connected together by a plurality of connecting strips arranged at intervals.

[0143] Optionally, the connecting strips in two adjacent connecting plates are arranged in a staggered manner. The manufacturing method of the fin is described below in conjunction with the accompanying drawings.

[0144] In other words, at least two fins 2 between adjacent flat tubes 1 are integrally formed with a rectangular corrugated plate extending in the transverse direction of the flat tube, wherein the transverse direction of the flat tube 1 can also be understood as the width direction of the flat tube. Specifically, a plurality of fins 2 are arranged at intervals along the transverse direction of the flat tube 1, and at least one of the two side edges of the fin 2 along the longitudinal direction of the flat tube 1 is connected to another adjacent fin 2 by a connecting plate 23. Moreover, the two side edges of the fin 2 at the middle position along the transverse direction of the flat tube 1 in the plurality of flat tubes 1 are respectively connected to the side edges of two different fins 2.

[0145] Reference Fig.24 , the multiple fins 2 are divided into the first fin 2, the second fin 2, the third fin 2, ... the Nth fin 2 arranged in the transverse direction of the flat tube 1, each fin 2 has a first side edge and a second side edge opposite to each other in the longitudinal direction of the flat tube 1, and the first side edges of the multiple fins 2 are opposite to each other in the transverse direction of the flat tube 1, and the second side edges of the multiple fins 2 are opposite to each other in the transverse direction of the flat tube 1. The first side edge on the first fin 2 is connected to the first side edge on the second fin 2 by a connecting plate 23, the second side edge on the second fin 2 is connected to the second side edge on the third fin 2 by a connecting plate 23, and so on.

[0146] Combination Fig.23 and Fig.26 Optionally, the connecting plate 23 of the rectangular corrugated plate is provided with a plurality of connecting strips 24 formed by stamping a portion of the connecting plate 23, the plurality of connecting strips 24 are spaced apart in the transverse direction of the fin 2, and the connecting strips 24 are turned over and cross the opening of the rectangular corrugated plate to connect with the adjacent fin 2. The structural strength of the heat exchanger 100 is effectively improved. Moreover, the discharge of condensed water and the air circulation are further facilitated.

[0147] Specifically, refer to Fig.26 The connecting plate 23 extends along the thickness direction of the flat tube 1. In the thickness direction of the flat tube 1, parts of the connecting plate 23 at predetermined intervals are punched. Through punching, through holes can be formed on the connecting plate 23. The unpunched parts of the connecting plate 23 are formed into connecting strips 24, which still connect the original two fins 2; and the punched parts of the connecting plate 23 are formed into connecting strips 24, which are connected to another fin 2 adjacent to the original two fins 2.

[0148] In other words, refer to Fig.26 , the multiple fins 2 are divided into a first fin 2, a second fin 2, a third fin 2...Nth fin 2 arranged along the transverse direction of the flat tube 1, each fin 2 has a first side edge and a second side edge opposite to each other along the longitudinal direction of the flat tube 1, and the first side edges of the multiple fins 2 are opposite to each other in the transverse direction of the flat tube 1, and the second side edges of the multiple fins 2 are opposite to each other in the transverse direction of the flat tube 1. The first side edge of the first fin 2 is connected to the first side edge of the second fin 2 by a plurality of connecting strips 24, and the plurality of connecting strips 24 are arranged at intervals along the thickness direction of the flat tube 1; the second side edge of the first fin 2 is connected to the second side edge of the second fin 2 by a plurality of connecting strips 24, and the plurality of connecting strips 24 are arranged at intervals along the thickness direction of the flat tube 1; the first side edge of the second fin 2 is connected to the first side edge of the third fin 2 by a plurality of connecting strips 24, and the plurality of connecting strips 24 are arranged at intervals along the thickness direction of the flat tube 1; the second side edge of the second fin 2 is connected to the second side edge of the third fin 2 by a plurality of connecting strips 24, and the plurality of connecting strips 24 are arranged at intervals along the thickness direction of the flat tube 1. And so on.

[0149] Reference Figure 23 to Figure 26 The fins 2 between the two flat tubes 1 are integrated and punched into rectangular waves. The vacant parts between the fins 2 are filled by the material after the adjacent wing top openings are turned 180° (that is, the connection plate 23 is partially opened and turned 180°), forming a wing top structure. The openings on the wing top are used for drainage. The fins 2 are processed on both sides of the longitudinal direction of the flat tube 1 using this wing top structure, so that a group of fins 2 is formed, and then installed between the two flat tubes 1. This structure can improve production efficiency on the one hand, and is also conducive to the drainage of the fins 2 on the other hand.

[0150] Example 8

[0151] Combination Figure 27-Figure 30 The fin 2 is provided with a positioning flange 22, and a folded edge 25 is provided at the free end of the positioning flange 22. The lengths of the positioning flanges 22 of at least two fins 2 along the transverse direction of the flat tube are not equal, the positioning flanges on multiple fins are stacked along the thickness direction of the flat tube, and the folded edges on multiple fins are arranged along the transverse direction of the flat tube on the transverse side of the flat tube.

[0152] Optionally, the multiple fins 2 between adjacent flat tubes 1 are nested together in sequence along the transverse direction of the flat tube 1, the folded edges 25 on the multiple fins 2 between adjacent flat tubes 1 are stacked together (or arranged in an array) in sequence along the transverse direction of the flat tube 1, and the folded edges 25 on the outermost fins 2 in the transverse direction of the flat tube 1 are clamped on the transverse side surface of the flat tube 1.

[0153] Specifically, refer to Fig. 27 and Fig.28, the multiple fins 2 between adjacent flat tubes 1 are nested in sequence along the transverse direction of the flat tube 1, and the positioning flanges 22 on the fins 2 will also be nested in sequence in the transverse direction of the flat tube 1. Optionally, the multiple positioning flanges 22 can be arranged in layers along the thickness direction of the flat tube 1. In addition, the folded edges 25 on the multiple flat tubes 1 will also be stacked in sequence in the transverse direction of the flat tube 1, and the multiple folded edges 25 can be stacked on the transverse side of the flat tube 1. Among them, since the multiple fins 2 are arranged in a nested manner, the folded edges on the outermost fins 2 among the multiple fins 2 will be stuck on the flat tube 1. Optionally, the folded edges on other fins 2 will also be stuck on the folded edges of adjacent fins 2 in sequence.

[0154] Each fin 2 of the heat exchanger 100 is integrally stamped and then inserted into the flat tube 1 piece by piece. The width of the fin 2 decreases from the middle of the flat tube 1 to the two ends of the flat tube 1. The width of the middle fin 2 is TP, and the width difference between adjacent fins 2 is 2t. Fig.29 and Fig.28 The assembly process is shown in FIG. 1 , where the middle fin 2 is installed first, and then the fins 2 on both sides of the flat tube 1 are installed. The fin 2 of this structure has a faster molding speed and is easy and quick to assemble, which can greatly improve production efficiency.

[0155] In addition, the fins 2 in the present invention can be nested in sequence from one side of the flat tube 1 in the transverse direction of the flat tube 1, or can be nested in sequence from both sides of the flat tube 1 in the transverse direction of the flat tube 1. In addition, when there are three or more flat tubes 1, a fin 2 is provided between each two adjacent flat tubes 1, and an air flow channel is formed between the two adjacent flat tubes 1. In different air flow channels, the fins 2 can be connected by folded edges.

[0156] Example 9

[0157] Combination Figure 27-Figure 30 The fin 2 is provided with a positioning flange 22, and a folded edge 25 is provided on the free end of the positioning flange 22. Along the transverse direction of the flat tube 1, the multiple fins 2 between adjacent flat tubes 1 are divided into two groups, and the positioning flanges on each group of fins are stacked along the thickness direction of the flat tube.

[0158] Optionally, each group of fins 2 is nested together in sequence along the transverse direction of the flat tube 1, and the folded edges 25 on each group of fins 2 are stacked (or arranged) together in sequence along the transverse direction of the flat tube 1, and the folded edges 25 on the outermost fins 2 in the transverse direction of the flat tube 1 are clamped on the longitudinal side of the flat tube 1.

[0159] Specifically, the folded edges on one group of fins are sequentially stacked (or arranged) on one lateral side of the flat tube along the transverse direction of the flat tube, and the folded edges on the other group of fins are sequentially stacked (or arranged) on the other lateral side of the flat tube along the transverse direction of the flat tube.

[0160] The fins 2 can be installed between the flat tubes 1 along the transverse direction of the flat tubes 1, and the fins 2 can be installed from both sides of the flat tubes 1 along the transverse direction, which makes assembly easier. In addition, if the fins 2 are installed only from one side of the flat tubes 1 along the transverse direction, the positioning flanges 22 of the multiple fins 2 may affect the heat conduction between the flat tubes 1 and the fins 2. Moreover, during the nesting process, the positioning flanges 22 of the fins 2 located on the outermost side of the multiple fins 2 will be relatively wide (the size along the transverse direction of the flat tubes 1), further affecting the heat conduction effect between the fins 2 and the flat tubes 1, and at the same time affecting the stability of the fit between the flat tubes 1 and the fins 2. Installing the fins 2 from both sides of the flat tubes 1 along the transverse direction can effectively solve these problems, effectively improve the heat conduction effect between the fins 2 and the flat tubes 1, and enhance the structural strength of the connection between the flat tubes 1 and the fins 2.

[0161] In addition, the fin 2 is installed from one side of the flat tube 1 along the transverse direction, which is also within the protection scope of the present invention.

[0162] Example 10

[0163] Combination Figure 27-Figure 30 There are more than three flat tubes 1, and the more than three flat tubes 1 are arranged parallel to each other and spaced apart along the thickness direction of the flat tube 1, wherein the flat sheet portion of the fin between two adjacent flat tubes is parallel to the flat sheet portion of the fin between the other two adjacent flat tubes, and the fin includes a positioning flange, and a folded edge is provided on the free end of the positioning flange, and one side folded edge on the fin between the two adjacent flat tubes is connected with one side folded edge on the fin between the other two adjacent flat tubes on a transverse side surface of the flat tube located in the middle, and the folded edges are parallel to each other in the transverse direction of the flat tube.

[0164] Optionally, the fins 2 are divided into two groups along the transverse direction of the flat tube 1, and the positioning flanges 22 on each group of fins 2 are stacked along the thickness direction of the flat tube 1, wherein the flanges 25 on one group of fins 2 are sequentially stacked on one transverse side of the flat tube along the transverse direction of the flat tube 1, and the flanges on the other group of fins are sequentially stacked on another transverse side of the flat tube along the transverse direction of the flat tube. In the transverse direction of the flat tube 1, the flanges 25 on the outermost fins 2 are clamped on the longitudinal side of the flat tube 1.

[0165] Connecting a plurality of fins 2 together can effectively improve the forming and installation efficiency of the fins 2 . Furthermore, the positioning of a plurality of flat tubes 1 can be achieved through the fins 2 , further effectively improving the assembly efficiency of the heat exchanger 100 .

[0166] Optionally, the fin includes two positioning flanges, and the positioning flanges are respectively connected to the two side edges of the flat sheet portion.

[0167] Embodiment 11

[0168] Combination Figure 31 to Figure 35In the above embodiments of the present invention provided with the positioning flange 22, an opening 27 can be provided on the positioning flange 22. Optionally, a plurality of holes are provided on the positioning flange 22 at intervals along the longitudinal direction of the flat tube 1, that is, an opening is provided on the positioning flange 22 along the longitudinal direction of the flat tube 1, the length of the positioning flange between adjacent openings along the longitudinal direction of the flat tube is u, and the length of the opening along the longitudinal direction of the flat tube 1 can be set to v, and the fin 2 is formed with a depression at the opening of the positioning flange 22, and the depth of the depression is s (optionally, the depth of the depression is not less than the thickness of the positioning flange 22).

[0169] In addition, for the aforementioned embodiments (especially embodiments 3 and 6), a positioning piece 26 may be provided at the free end of the positioning flange 22 for positioning between adjacent fins 2. After the fin 2 and the flat tube 1 are assembled, the positioning piece 26 abuts against the vertical surface of the second step 104 on the flat tube 1 or another fin 2. The width of the positioning piece 26 (the dimension along the thickness direction of the flat tube 1; or the extension distance of the positioning piece along the thickness direction of the flat tube away from the free end of the positioning flange) may be k, and the spacing between the fins 2 may be FP.

[0170] The provision of the opening 27 and the positioning sheet 26 can facilitate the brazing of the heat exchanger 100. During the brazing process, the brazing agent can penetrate into the gap between the fin 2 and the flat tube 1 from the opening, thereby achieving a better brazing effect.

[0171] In addition, the thickness of the flat part of fin 2 is t, 1 <k / t≤10;t≤s≤k;0.1≤u / v≤10。

[0172] According to the above embodiment of the present invention, the water flow path on the air side is changed so that the water is quickly drained from the gaps between the fins 2. On the one hand, since the water is quickly drained away and not retained, the wind resistance will be reduced; on the other hand, since less water is retained, the thermal resistance of the water film is reduced, so the heat exchange performance will be improved. According to experimental data, Fig.35 The experimental results in .

[0173] In the present invention, the flat tubes 1 and fins 2 in the heat exchanger 100 are placed vertically, and the fins 2 are arranged in parallel along the width direction of the flat tubes 1, and the thickness direction of the fins 2 is consistent with the width direction of the flat tubes 1. The fins 2 are formed by stamping or other methods, and the fins 2 are positioned by various flanges or slots. The air flows through the window gaps of the fins 2, and the water on the air side is quickly discharged from the gaps between the fins 2.

[0174] In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "length", "width", "thickness", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0175] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0176] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0177] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature 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. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0178] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A heat exchanger, characterized in that: include: A flat tube, wherein the flat tubes are spaced apart from each other in a thickness direction of the flat tube, and a fluid channel extending in a longitudinal direction of the flat tube is provided in the flat tube; Fins, the fins are arranged between adjacent flat tubes, a plurality of fins between adjacent flat tubes are arranged parallel to each other and spaced apart along the transverse direction of the flat tubes, each fin extends along the longitudinal direction of the flat tubes, the fins include a flat sheet portion, the fins include a positioning flange, the positioning flange of one of the fins is connected to the side edge of the flat sheet portion of the fin and extends toward the fin adjacent to the fin, and the flat sheet portion is provided with a plurality of ventilation windows along the longitudinal direction of the flat tubes; A folded edge is provided on the free end of the positioning flange, the lengths of the positioning flanges of at least two of the fins in the width direction of the flat tube are unequal, the positioning flanges on the multiple fins are stacked along the thickness direction of the flat tube, and the folded edges on the multiple fins are arranged on the lateral side of the flat tube along the width direction of the flat tube, There are more than three flat tubes, and the more than three flat tubes are arranged in parallel and spaced apart along the thickness direction thereof, wherein the flat sheet portion of the fin between two adjacent flat tubes is parallel to the flat sheet portion of the fin between another two adjacent flat tubes, and the folded edge of the fin between two adjacent flat tubes is connected to the folded edge of the fin between another two adjacent flat tubes on a lateral side surface of the flat tube located in the middle, and the folded edges are parallel to each other in the lateral direction of the flat tube.

2. The heat exchanger according to claim 1, characterized in that: The positioning flange is provided with openings along the longitudinal direction of the flat tube, the length of the positioning flange between adjacent openings along the longitudinal direction of the flat tube is u, and the length of the opening along the longitudinal direction of the flat tube is v, wherein 0.1≤u / v≤10.

3. The heat exchanger according to claim 1, characterized in that: The ventilation window comprises a window blade connected to the flat sheet portion and an opening located on the flat sheet portion.

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