Heat exchanger and method of manufacturing a heat exchanger

Abstract

The application relates to the technical field of heat exchangers, and provides a heat exchanger and a manufacturing method of the heat exchanger. The heat exchanger comprises a plurality of heat exchange flat tubes arranged along a first direction. Each of at least part of the heat exchange flat tubes comprises a plurality of heat exchange zones and a bending zone connecting two adjacent heat exchange zones. The bending zone is formed along the width direction of the heat exchange flat tube. The width direction of the heat exchange flat tube is perpendicular to the first direction. The width of the bending zone is L1, the width of each heat exchange zone is L2, and L1>2xL2. The above scheme can effectively alleviate the problem that the bending zone of the heat exchange flat tube is prone to accumulating dust and other impurities and forming a corrosive micro-environment to corrode the heat exchange flat tube, thereby affecting the heat exchange effect of the heat exchanger.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, specifically to a heat exchanger and a method for manufacturing the heat exchanger. Background Technology

[0002] Multi-row heat exchangers include multiple heat exchange flat tubes. These flat tubes are bent to form two heat exchange zones and a bend zone connecting the two zones. In existing technology, the bend zone is twisted relative to the heat exchange zone, causing it to bulge towards the adjacent flat tube. In this structure, the bulging bend zone has a large windward and leeward area (compared to the heat exchange zone). Dust and other impurities in the air are easily adsorbed in the windward area and are not easily carried away by the airflow. When the air humidity is high, the dust and other impurities adsorbed in the windward area mix with the humid air to easily form a corrosive microenvironment. This not only affects the heat exchange efficiency of the heat exchanger but also corrodes the flat tubes, thus affecting their normal use. Summary of the Invention

[0003] In view of this, this application provides a heat exchanger and a method for manufacturing the heat exchanger, which can effectively alleviate the problem in the prior art that the bending area of ​​the heat exchange flat tube is prone to the accumulation of dust and other impurities, forming a corrosive microenvironment that corrodes the heat exchange flat tube and affects the heat exchange effect of the heat exchanger.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A heat exchanger includes a plurality of heat exchange flat tubes arranged along a first direction, wherein:

[0006] At least some of the heat exchange flat tubes include multiple heat exchange zones and a bending zone connecting two adjacent heat exchange zones. The bending zone is formed by bending along the width direction of the heat exchange flat tube, which is perpendicular to the first direction. The width of the bending zone is L1, and the width of each heat exchange zone is L2, where L1 > 2xL2.

[0007] Preferably, in any two adjacent heat exchange flat tubes, at least one of them has parts located on the same plane.

[0008] Preferably, in each of the at least some heat exchange flat tubes, two adjacent heat exchange zones satisfy the parallel condition, and the minimum gap between two adjacent heat exchange zones in the width direction is L3, where L3+2L2<L1.

[0009] Preferably, in the width direction, the bending region has a protrusion that protrudes to one side relative to the two heat exchange regions connected to the bending region.

[0010] Preferably, in the width direction, the bending region has a protrusion that protrudes to both sides relative to the two heat exchange regions connected to the bending region.

[0011] Preferably, the bending zone includes at least one first arc segment and at least one second arc segment, the second arc segment being connected to one end of the at least one first arc segment near the heat exchange zone, the centers of the first arc segment and the second arc segment being located inside the heat exchange flat tube, and the second arc segment enabling the two heat exchange zones connected to the bending zone to be close to each other.

[0012] Preferably, the bending zone further includes at least one third arc segment, which is connected one-to-one with the end of the second arc segment near the heat exchange zone. The center of the third arc segment is located outside the heat exchange flat tube, so that the two heat exchange zones connected to the bending zone satisfy the parallel condition.

[0013] Preferably, the thickness of the bending zone and the thickness of the heat exchange zone meet the same conditions.

[0014] Preferably, the heat exchanger further includes a first manifold and a second manifold, with at least one end of a portion of the heat exchange flat tube connected to the first manifold and the other end connected to the second manifold;

[0015] The first manifold and the second manifold have different diameters; or,

[0016] The first manifold and the second manifold have the same diameter.

[0017] Preferably, the heat exchange flat tube further includes at least one connecting region, which is connected to the heat exchange region and forms the end of the heat exchange flat tube for connecting the first manifold or the second manifold. The connecting region and the heat exchange region connected thereto have an angle, so that the connecting region extends in a direction away from the adjacent heat exchange region.

[0018] Preferably, the length of the heat exchange zone connecting the first manifold or the second manifold is different from the length of the adjacent heat exchange zone.

[0019] Preferably, the first manifold is a refrigerant inlet pipe, and a refrigerant distribution device is provided in the first manifold.

[0020] Preferably, in the target operating mode, the heat exchanger is a condenser.

[0021] Preferably, the first manifold and the second manifold are located on the lower side of the heat exchanger and are arranged horizontally.

[0022] Preferably, the dimension of the heat exchanger in the first direction is greater than the dimension of the heat exchanger in the length direction of the heat exchange flat tube.

[0023] Preferably, the heat exchanger further includes a first fin, and the first fin is connected between at least one pair of adjacent heat exchange flat tubes, wherein at least two heat exchange zones of the same heat exchange flat tube in the at least one pair of adjacent heat exchange flat tubes are connected to the same first fin.

[0024] Preferably, the heat exchanger further includes a second fin, and the second fin is connected between the bending areas of at least one pair of adjacent heat exchange flat tubes.

[0025] Preferably, all portions of at least one of the heat exchange flat tubes are located in the same plane.

[0026] Preferably, in two heat exchange zones connected to the same bending zone, the distance between the ends of the two heat exchange zones connecting the bending zone is greater than the distance between the ends of the two heat exchange zones away from the bending zone, or...

[0027] The distance between the ends of the two heat exchange zones that connect to the bending zone is less than the distance between the ends of the two heat exchange zones that are away from the bending zone.

[0028] Preferably, the distance between two adjacent heat exchange zones gradually decreases, remains constant, or gradually increases along the direction away from the bending zone connected to them.

[0029] A method for manufacturing a heat exchanger, the method comprising:

[0030] Bending the heat exchange flat tube;

[0031] The fins are connected to two adjacent heat exchange flat tubes, and the two heat exchange zones located at both ends of the heat exchange flat tubes are respectively connected to the first manifold and the second manifold, so that the heat exchange flat tubes are in communication with the first manifold and the second manifold.

[0032] In the embodiments of this application, at least some of the bending areas of the heat exchange flat tubes are formed by bending along a direction perpendicular to the arrangement direction of the multiple heat exchange flat tubes. The bending area of ​​the heat exchange flat tubes formed by bending in this way will not bulge towards the adjacent heat exchange flat tubes. Compared with the bending area formed by twisting in the prior art, it can reduce the area of ​​the windward and leeward areas of the bending area, thereby alleviating the problem of dust and other impurities in the air being adsorbed on the bending area to form a corrosive microenvironment that corrodes the heat exchange flat tubes, thereby improving the heat exchange efficiency of the heat exchanger and increasing the corrosion resistance life of the heat exchanger. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 A front view of the heat exchanger according to the first embodiment provided in this application;

[0035] Figure 2 A side view of the heat exchanger according to the first embodiment provided in this application;

[0036] Figure 3 A shaft-side view of the heat exchanger according to the first embodiment provided in this application;

[0037] Figure 4 A front view of the heat exchanger according to the second embodiment provided in this application;

[0038] Figure 5 A side view of the heat exchanger according to the second embodiment provided in this application;

[0039] Figure 6 Axonometric view of the heat exchanger according to the third embodiment provided in this application;

[0040] Figure 7 A front view of the heat exchanger provided in the third embodiment of this application;

[0041] Figure 8 A side view of the heat exchanger according to the third embodiment provided in this application;

[0042] Figure 9 A front view of the heat exchanger provided in the fourth embodiment of this application;

[0043] Figure 10 A side view of the heat exchanger provided in the fourth embodiment of this application;

[0044] Figure 11 A schematic diagram of the structure of the heat exchange flat tube of the first type provided in the embodiments of this application;

[0045] Figure 12 A side view of a heat exchange flat tube with a first structure provided in an embodiment of this application;

[0046] Figure 13 This is a schematic diagram of the structure of the heat exchange flat tube with the second structure provided in the embodiments of this application;

[0047] Figure 14A schematic diagram of the structure of the heat exchange flat tube with the third structure provided in the embodiments of this application;

[0048] Figure 15 A schematic diagram of the structure of the fourth type of heat exchange flat tube provided in the embodiments of this application;

[0049] Figure 16 This is a schematic diagram of the structure of the fifth type of heat exchange flat tube provided in the embodiments of this application;

[0050] Figure 17 A schematic diagram of the structure of the sixth type of heat exchange flat tube provided in the embodiments of this application;

[0051] Figure 18 A schematic diagram of the seventh structure of the heat exchange flat tube provided in the embodiments of this application;

[0052] Figure 19 An exploded view of a heat exchanger provided in an embodiment of this application;

[0053] Figure 20 A front view of the first fin provided in an embodiment of this application;

[0054] Figure 21 A top view of the first fin provided in an embodiment of this application;

[0055] Figure 22 for Figure 21 A cross-sectional view along the AA direction;

[0056] Figure 23 A flowchart illustrating a method for manufacturing a heat exchanger provided in an embodiment of this application.

[0057] exist Figures 1-22 middle:

[0058] 1-First manifold, 11-First mounting seam, 2-Second manifold, 3-Heat exchange flat tube, 31-Heat exchange zone, 32-Bending zone, 321-Protrusion, R1-First arc segment, R2-Second arc segment, R3-Third arc segment, 33-First connection zone, 34-Second connection zone, 4-First fin, 41-Base plate, 42-Window fin, 5-Second fin, 6-Refrigerant distribution device. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] like Figures 1-22 As shown in the figure, this application embodiment provides a heat exchanger, which includes a manifold and a heat exchange flat tube 3. The manifold includes a first manifold 1 and a second manifold 2. The first manifold 1 is a refrigerant inlet pipe and may be provided with a refrigerant distribution device 6. The second manifold 2 is a refrigerant outlet pipe. The axes of the first manifold 1 and the second manifold 2 are parallel and the first manifold 1 and the second manifold 2 are distributed side by side.

[0061] There are multiple heat exchange flat tubes 3, which are arranged at intervals along a first direction. The first direction is consistent with the axial direction of the first manifold 1 and the second manifold 2. That is, the multiple heat exchange flat tubes 3 are arranged at intervals along the axial direction of the first manifold 1 and the second manifold 2 (i.e., arranged along the x-direction). The heat exchange flat tubes 3 have a bent structure, including multiple heat exchange zones 31 and a bending zone 32 connecting two adjacent heat exchange zones 31. The bending zone 32 is formed by bending along the width direction of the heat exchange flat tube 3, and the width direction of the heat exchange flat tube 3 is perpendicular to the first direction. One end of all the heat exchange flat tubes 3 is connected to the first manifold 1, and the other end is connected to the second manifold 2, so that the refrigerant can flow through the first manifold 1, the heat exchange flat tubes 3, and the second manifold 2 in sequence.

[0062] like Figure 1 The coordinate system is defined with the arrangement direction of the multiple heat exchange flat tubes 3 and the thickness direction of the heat exchange flat tubes 3 as the x-axis, the width direction of the heat exchange flat tubes 3 as the y-axis, and the length direction of the heat exchange flat tubes 3 as the z-axis.

[0063] During the use of a heat exchanger, the airflow in the environment flows through the heat exchanger in the y-direction.

[0064] The bending zone 32 of the heat exchange flat tube 3 is formed by bending along the width direction of the heat exchange flat tube 3. This means that after the heat exchange flat tube 3 is bent, the two adjacent heat exchange zones 31 of the heat exchange flat tube 3 are arranged along the width direction of the heat exchange flat tube 3, that is, arranged along the y direction.

[0065] In this embodiment, the bending region 32 of the heat exchange flat tube 3 is formed by bending along a direction perpendicular to the arrangement direction of the plurality of heat exchange flat tubes 3. This bending method prevents the bending region 32 from protruding towards the adjacent heat exchange flat tube 3, and can reduce the area of ​​the windward and leeward areas of the bending region 32. This alleviates the problem of dust and other impurities in the air being adsorbed on the bending region 32 to form a corrosive microenvironment that corrodes the heat exchange flat tube, thereby improving the heat exchange efficiency of the heat exchanger and extending the corrosion resistance life of the heat exchanger.

[0066] In existing heat exchangers, the bending areas of the heat exchange flat tubes twist and bulge towards adjacent heat exchange flat tubes, even abutting or overlapping each other. This creates an overlapping area at the bending areas of two adjacent heat exchange flat tubes, making it difficult for airflow to pass through the bending areas of the two adjacent heat exchange flat tubes. As a result, dust and other impurities easily accumulate in the overlapping area. The accumulated dust and other impurities mix with humid air to form a corrosive microenvironment, further affecting the heat exchanger's heat exchange efficiency.

[0067] Therefore, in this embodiment, all heat exchange flat tubes 3 can be heat exchange flat tubes 3 with the above-described structure, that is, including multiple heat exchange zones 31 and a bending zone 32 connecting two adjacent heat exchange zones 31, and the bending zone 32 is formed by bending along the width direction of the heat exchange flat tube 3. In this case, compared with the prior art, this embodiment can increase the spacing between the bending zones 32 of two adjacent heat exchange flat tubes 3 without increasing the spacing between adjacent heat exchange flat tubes 3, and ensure that there is no overlap between two adjacent heat exchange flat tubes 3 in the airflow direction, so that dust and air can pass smoothly between the bending zones 32 of two adjacent heat exchange flat tubes 3, thereby effectively alleviating the problem of dust and other impurities accumulating in the bending zones 32 of the heat exchange flat tubes 3, resulting in a corrosive microenvironment, and improving the corrosion resistance life of the heat exchanger.

[0068] In a further technical solution, after the heat exchange flat tube 3 is bent along the width direction, each part of the heat exchange flat tube 3 can be located on the same plane, and this plane is perpendicular to the first direction, which further ensures that the bending area 32 will not protrude towards the heat exchange flat tube 3 adjacent to it, and ensures that there is no overlap between two adjacent heat exchange flat tubes 3.

[0069] It should be noted that all parts of the heat exchange flat tube 3 are located in the same plane. This plane refers to a plane with a certain thickness. The thickness of this plane satisfies the same condition as the thickness of the heat exchange flat tube 3 before bending. That is to say, the thickness of this plane can be equal to the thickness of the heat exchange flat tube 3 before bending, or it can be approximately equal to the thickness of the heat exchange flat tube 3 before bending. For example, the thickness of this plane can be the thickness of the heat exchange flat tube 3 before bending ±0.5mm.

[0070] Of course, in some embodiments, part of the heat exchange flat tube 3 can be the heat exchange flat tube 3 with the above-described structure (i.e., the heat exchange flat tube 3 formed by bending the bending region 32 along the width direction of the heat exchange flat tube 3), while the remaining part of the heat exchange flat tube 3 can be a heat exchange flat tube with other structures, such as a heat exchange flat tube 3 including a torsional bending region (i.e., the structure is the same as that of the heat exchange flat tube in the prior art, with the torsional bending region protruding towards the adjacent heat exchange flat tube). Under this structure, the bending region 32 of the part of the heat exchange flat tube 3 is less prone to accumulating dust and other impurities, and is less likely to form a corrosive microenvironment. Therefore, it can also alleviate the problem in the prior art where the bending region of the heat exchange flat tube of the heat exchanger is prone to accumulating dust and other impurities and forming a corrosive microenvironment that corrodes the heat exchange flat tube and affects the heat exchange effect of the heat exchanger.

[0071] In the aforementioned bending zone 32, which is a heat exchange flat tube 3 formed by bending along the width direction of the heat exchange flat tube 3, at least one part of the heat exchange flat tube 3 can be located on the same plane. That is to say, some parts of the bending zone 32 formed by bending along the width direction are not structures where all parts are located on the same plane (such heat exchange flat tube 3 may be: due to processing errors, different parts of the bending zone 32 are uneven, and the size of this unevenness is greater than the plane thickness mentioned above, that is, the bending zone 32 is not a planar structure; or, due to process requirements, the plane where the bending zone 32 is located has an angle with the plane where the heat exchange zone 31 is located, etc.).

[0072] Each heat exchange flat tube 3 in the embodiments of this application can be a heat exchange flat tube 3 in which all parts are located on the same plane. Of course, in some embodiments, among all the heat exchange flat tubes 3, some heat exchange flat tubes 3 can be heat exchange flat tubes 3 in which all parts are located on the same plane, and some heat exchange flat tubes 3 are heat exchange flat tubes 3 in which all parts are not located on the same plane (such heat exchange flat tubes 3 are, for example, the heat exchange flat tubes 3 with torsional bending areas mentioned above, or the heat exchange flat tubes 3 formed by bending along the width direction mentioned above, in which all parts are not located on the same plane), and in any two adjacent heat exchange flat tubes 3, at least one heat exchange flat tube 3 has all parts located on the same plane.

[0073] In this embodiment, in any two adjacent heat exchange flat tubes 3, at least one of their portions is located on the same plane. This can reduce the area of ​​the windward and leeward regions of the bending area 32 of some heat exchange flat tubes 3, alleviating the problem in the prior art where the bending area of ​​the heat exchange flat tube is prone to accumulating dust and other impurities and forming a corrosive microenvironment that corrodes the heat exchange flat tube. Compared with the prior art, this structure can also increase the distance between the bending areas 32 of two adjacent heat exchange flat tubes 3 without increasing the distance between adjacent heat exchange flat tubes 3, so that dust and air can pass smoothly between the bending areas 32 of two adjacent heat exchange flat tubes 3, thereby effectively preventing the accumulation of dust and other impurities in the bending area 32 of the heat exchange flat tube 3.

[0074] In the above embodiments, when each part of the heat exchange flat tube 3 is located in the same plane, the plane can be the yz plane, which is perpendicular to the x-direction, that is, perpendicular to the first direction. Of course, in some embodiments, when each part of the heat exchange flat tube 3 is located in the same plane, the plane can also be a plane with a certain angle of inclination to the yz plane.

[0075] Each heat exchange flat tube 3 may include two heat exchange zones 31 and one bending zone 32. Of course, the number of heat exchange zones 31 and bending zones 32 may also be set to other quantities, such as four heat exchange zones 31 and two bending zones 32. The accompanying drawings in this specification are all illustrative of heat exchange flat tube 3 having two heat exchange zones 31 and one bending zone 32.

[0076] All parts of the heat exchange flat tube 3 are located on the same plane. During the actual bending process of the heat exchange flat tube 3, the bending area 32 of the heat exchange flat tube 3 will be squeezed or stretched to a certain extent in the inner and outer arc edges formed by bending. The thickness of the bending area 32 has a certain amount of deformation relative to the thickness of the heat exchange area 31, but the amount of deformation is small. Therefore, in the direction perpendicular to the plane, the thickness of the bending area 32 and the thickness of the heat exchange area 31 meet the same conditions.

[0077] It should be noted that the condition that the thickness of the bending zone 32 and the thickness of the heat exchange zone 31 meet the same condition means that the thickness of the bending zone 32 and the thickness of the heat exchange zone 31 are equal, or that the thickness of the bending zone 32 and the thickness of the heat exchange zone 31 are approximately equal. For example, when the thickness of the bending zone 32 is L4 and the thickness of the heat exchange zone 31 is L5, L4 = L5 ± 0.5 mm.

[0078] The heat exchange flat tube 3 is bent along the width direction to form a bent structure. The width of the bent area 32 of the heat exchange flat tube 3 is L1, and the width of each heat exchange area 31 is L2. L1 is greater than 2L2, that is, L1>2xL2. This structure helps to reduce the processing difficulty of the heat exchange flat tube 3.

[0079] In each heat exchange flat tube 3 formed by bending along the width direction, two adjacent heat exchange zones 31 satisfy the parallel condition, and the minimum gap between two adjacent heat exchange zones 31 in the width direction is L3, L3+2L2<L1. This structure not only helps to reduce the size of the heat exchange zone 31 in the width direction of the heat exchange flat tube 3, but also reduces the difficulty of the bending process of the heat exchange flat tube 3.

[0080] Optionally, L3 can approach zero or be equal to zero.

[0081] It should be noted that the parallel condition of two adjacent heat exchange zones 31 means that the two adjacent heat exchange zones 31 are distributed in parallel, or that the two adjacent heat exchange zones 31 are approximately parallel, for example, the included angle between the two adjacent heat exchange zones 31 is small, for example, less than 10 degrees.

[0082] Please refer to Figures 11 to 18 The structure of the bending zone 32 formed by bending along the width direction of the heat exchange flat tube 3 can vary. The bending zone 32 includes at least one first arc-shaped segment R1 and at least one second arc-shaped segment R2 (in the case where the bending zone 32 includes multiple first arc-shaped segments R1, these segments can be connected sequentially). The second arc-shaped segment R2 is connected to the end of the entire structure formed by connecting all the first arc-shaped segments R1, closer to the heat exchange zone 31. The centers of both the first arc-shaped segments R1 and R2 are located inside the heat exchange flat tube 3 (this "inner side" refers to the side surrounding the arc-shaped bending zone 32; specifically, the center of the first arc-shaped segment R1 is...). Figure 11 Point a shown in the diagram, the center of the second arc segment R2 is... Figure 11 Point b shown in the figure (in some examples, points a and b may also coincide), the second arc segment R2 can bring the two heat exchange zones 31 connected to the bending zone 32 closer to each other, thereby reducing the distance between the two heat exchange zones 31.

[0083] The bending zone 32 may further include at least one third arc-shaped segment R3, which is connected one-to-one with the end of the second arc-shaped segment R2 near the heat exchange zone 31. The center of the third arc-shaped segment R3 is located on the outer side of the heat exchange flat tube 3 (this outer side refers to the outer periphery of the arc-shaped bending zone 32; specifically, the center of the third arc-shaped segment R3 is...). Figure 11 Point c shown in the diagram is used to ensure that the two heat exchange zones 31 connected to the bending zone 32 satisfy the parallel condition.

[0084] This structure reduces the distance between the two heat exchange zones 31 adjacent to the bending zone 32, thereby reducing the overall size of the heat exchanger in the y direction and making the overall installation space more compact. It also solves the problem of difficulty in bending caused by the small distance between the two heat exchange zones 31 adjacent to the bending zone 32.

[0085] In addition, the heat exchange flat tube 3 obtained by this bending method has a small gap between two adjacent heat exchange zones 31. The heat exchanger includes fins, and multiple heat exchange zones 31 on the same heat exchange flat tube 3 can be connected to the same first fin 4. The heat exchange flat tube 3 obtained by the above bending method can reduce the waste of the heat exchange area of ​​the first fin 4 and improve the heat exchange performance.

[0086] There are various structures for the heat exchange flat tube 3 that is bent along the width direction to form the bending zone 32.

[0087] In the first type of heat exchange flat tube 3, please refer again. Figure 11 In the width direction, the bending region 32 has a protrusion 321 that protrudes to one side relative to two heat exchange regions 31 connected to the bending region 32, and the two (or more) heat exchange regions 31 have equal lengths. In the structure where the protrusion 321 protrudes to one side, the bending region 32 may include a first arc segment R1, a second arc segment R2, and a third arc segment R3. One end of the first arc segment R1 is connected to one of the heat exchange regions 31, and the other end is sequentially connected to the second arc segment R2 and the third arc segment R3. The third arc segment R3 is connected to the other heat exchange region 31.

[0088] In the first type of heat exchange flat tube 3, the two heat exchange zones 31 connected to the same bend 32 are parallel. Among the two heat exchange zones 31 connected to the same bend 32, the outer edge extension line of one of the heat exchange zones 31 (e.g.) Figure 11 The dashed line segment in the diagram intersects with the bending zone 32, while the outer edge extension of the other heat exchange zone 31 does not intersect with the bending zone 32 (they may be tangent or have a certain distance between them). It should be noted that the outer edge extension of the heat exchange zone 31 refers to the edge extension line that is away from the other heat exchange zone 31.

[0089] In the second type of heat exchange flat tube 3, please refer again. Figure 13 Two heat exchange zones 31 connected to the same bending zone 32 are parallel. In the width direction, the bending zone 32 has a protrusion 321 that protrudes to both sides relative to the two heat exchange zones 31 connected to the bending zone 32. The lengths of the two (or more) heat exchange zones 31 are equal. In the structure where the protrusion 321 protrudes to both sides, the bending zone 32 may include a first arc segment R1, two second arc segments R2, and two third arc segments R3. The two second arc segments R2 are respectively connected to the two ends of the first arc segment R1, and the two third arc segments R3 are respectively connected to the two ends of the two second arc segments R2 that are closer to the heat exchange zone 31 (and also farther away from the first arc segment R1), and the two third arc segments R3 are respectively connected to the two heat exchange zones 31.

[0090] In the second type of heat exchange flat tube 3, in the two heat exchange zones 31 connected to the bending zone 32, the outer edge extension lines of the two heat exchange zones 31 (e.g.) Figure 13 Both of the dashed line segments in the diagram intersect with this bend zone 32.

[0091] For the third type of heat exchange flat tube 3, please refer again. Figure 14The two heat exchange zones 31 connected to the same bending zone 32 are parallel. In the width direction, the bending zone 32 has a protrusion 321 that protrudes to both sides relative to the two heat exchange zones 31 connected to the bending zone 32. The two heat exchange zones 31 have different lengths. This structure facilitates the connection of the two heat exchange zones 31 to the first manifold 1 and the second manifold 2 respectively, and prevents interference between the positions of the first manifold 1 and the second manifold 2.

[0092] Of course, when the same heat exchange flat tube 3 has two or more heat exchange zones 31, the length of the heat exchange zone 31 connecting the first manifold 1 or the second manifold 2 is different from the length of the adjacent heat exchange zone 31, so as to facilitate the installation of the first manifold 1 and the second manifold 2 and prevent interference between the first manifold 1 and the second manifold 2.

[0093] To prevent interference between the first manifold 1 and the second manifold 2, the heat exchange flat tube 3 may also include at least one connecting region connected to the heat exchange region 31 and forming the end of the heat exchange flat tube 3 for connecting the first manifold 1 or the second manifold 2. The connecting region and the heat exchange region 31 connected thereto have an angle so that the connecting region extends away from the adjacent heat exchange region 31, thereby preventing interference between the first manifold 1 and the second manifold 2.

[0094] The heat exchange flat tube 3 may include one or two connection areas, specifically:

[0095] In the fourth type of heat exchange flat tube 3, please refer again. Figure 15 The two heat exchange zones 31 connected on the same bending zone 32 are parallel. In the width direction, the bending zone 32 has a protrusion 321 that protrudes to one side relative to the two heat exchange zones 31 connected to the bending zone 32. The heat exchange flat tube 3 also includes a first connecting zone 33 connecting the heat exchange zone 31 and the first manifold 1. The first connecting zone 33 and the other heat exchange zone 31 have an angle so that the first connecting zone 33 extends away from the other heat exchange zone 31. This structure facilitates the connection of the two heat exchange zones 31 to the first manifold 1 and the second manifold 2 respectively, preventing interference between the positions of the first manifold 1 and the second manifold 2.

[0096] In the fifth type of heat exchange flat tube 3, please refer again. Figure 16Two heat exchange zones 31 connected on the same bending zone 32 are parallel. In the width direction, the bending zone 32 has a protrusion 321 that protrudes to both sides relative to the two heat exchange zones 31 connected to the bending zone 32. The heat exchange flat tube 3 also includes a first connecting zone 33 connecting one of the heat exchange zones 31 to the first manifold 1 and a second connecting zone 34 connecting the other heat exchange zone 31 to the second manifold 2. The first connecting zone 33 and the heat exchange zone 31 connected to it form an angle, and the second connecting zone 34 and the heat exchange zone 31 connected to it also form an angle. The first connecting zone 33 and the second connecting zone 34 extend in a direction away from each other. This structure facilitates the connection of the two heat exchange zones 31 to the first manifold 1 and the second manifold 2 respectively, preventing interference between the positions of the first manifold 1 and the second manifold 2.

[0097] In the sixth type of heat exchange flat tube 3, please refer again. Figure 17 Two heat exchange zones 31 connected to the same bending zone 32 are approximately parallel and have an included angle α (as mentioned above, the included angle α can be less than 10°). In the width direction, the bending zone 32 has a protrusion 321 that protrudes to one side relative to the two heat exchange zones 31 connected to the bending zone 32. The heat exchange zone 31 connected to the protrusion 321 moves closer to the other heat exchange zone 31. Among the two heat exchange zones 31 connected to the same bending zone 32, the distance between the ends of the two heat exchange zones 31 connected to the bending zone 32 is greater than the distance between the ends of the two heat exchange zones 31 that are away from the bending zone 32.

[0098] In the seventh type of heat exchange flat tube 3, please refer again. Figure 18 Two heat exchange zones 31 connected to the same bending zone 32 are approximately parallel and have an included angle α (as mentioned above, the included angle α can be less than 10°). In the width direction, the bending zone 32 has a protrusion 321. The protrusion 321 protrudes to one side relative to the two heat exchange zones 31 connected to the bending zone 32. The heat exchange zone 31 connected to the protrusion 321 extends away from the other heat exchange zone 31. In the two heat exchange zones 31 connected to the same bending zone 32, the distance between the ends of the two heat exchange zones 31 connected to the bending zone 32 is less than the distance between the ends of the two heat exchange zones 31 away from the bending zone 32, so that the end of one of the heat exchange zones 31 used to connect the first manifold 1 or the second manifold 2 is raised, which facilitates the installation of the first manifold 1 and the second manifold 2.

[0099] Of course, in some embodiments, the distance between two adjacent heat exchange zones 31 can gradually decrease in the direction away from the bending zone 32, or it can remain unchanged, or it can gradually increase. That is to say, the heat exchange zone 31 can be a straight pipe section.

[0100] It should be noted that the structure of the heat exchange flat tube 3 in this application embodiment is not limited to the above seven structures of heat exchange flat tube 3. The above features of the heat exchange flat tube 3 (the protrusion 321 protrudes to one side or to both sides, the length of the heat exchange area 31 of the heat exchange flat tube 3 connecting the manifold is the same as or different from the length of the adjacent heat exchange area 31, whether the heat exchange flat tube 3 has a connecting area connecting the heat exchange area 31 and the manifold, and whether the two heat exchange areas 31 connected to the same bending area 32 are parallel or approximately parallel) can be arbitrarily combined to form heat exchange flat tubes 3 with different structures.

[0101] In this embodiment of the application, in order to improve the heat exchange efficiency of the heat exchanger, the heat exchanger may further include a first fin 4 and a second fin 5. The heat exchange zones 31 of at least a pair of adjacent heat exchange flat tubes 3 may be connected by a first fin 4, and the bending zones 32 of at least a pair of adjacent heat exchange flat tubes 3 may be connected by a second fin 5. The first fin 4 and the second fin 5 may both be wavy and extend along the length direction of the heat exchange flat tubes 3, and the first fin 4 and the second fin 5 may both form gaps in the width direction for airflow to pass through.

[0102] At least two heat exchange zones 31 of the same heat exchange flat tube 3 in at least one pair of adjacent heat exchange flat tubes 3 can be connected to the same first fin 4, that is, multiple heat exchange zones 31 of the same heat exchange flat tube 3 share the same first fin 4.

[0103] Alternatively, multiple first fins 4 can be connected to the same heat exchange flat tube 3, with each first fin 4 corresponding to a heat exchange zone 31. Each heat exchange zone 31 of the heat exchange flat tube 3 corresponds to an independent first fin 4. In this structure, the density and other parameters of the first fins 4 connected to different heat exchange zones 31 of the heat exchange flat tube 3 can be different, so that the airflow can pass through the heat exchanger more smoothly.

[0104] When two heat exchange zones 31 of the same heat exchange flat tube 3 share the same first fin 4, the width of the first fin 4 and 2L2 satisfy the same condition. That is, the width of the first fin 4 can be equal to 2L2 or approximately equal to 2L2. For example, the width of the first fin 4 can be L3+2L2.

[0105] Of course, when two first fins 4 are connected to the same heat exchange flat tube 3, the total width occupied by the two first fins 4 in the width direction can satisfy the same condition as 2L2. In this case, the gap between the first fins 4 between two different heat exchange zones 31 of the same heat exchange flat tube 3 can be reduced, the turbulence of the airflow when flowing through the two different heat exchange zones 31 can be reduced, and the resistance to airflow can be reduced.

[0106] The first fin 4 can be as follows: Figures 20-21The louvered fins shown include a base plate 41 and fins 42. The height e of the first fin 4 can be adjusted according to the spacing between two adjacent heat exchange flat tubes 3. Adjusting the spacing f between two adjacent peaks of the corrugated first fin 4 can adjust the density of the first fin 4. When multiple first fins 4 are connected to the same heat exchange flat tube 3, and the first fins 4 are connected to heat exchange zones 31 in a one-to-one correspondence, the density, opening angle θ, and opening spacing d of the first fins 4 connected to different heat exchange zones 31 of the heat exchange flat tube 3 can be different. This allows adjustment of parameters such as the flow velocity and direction of the airflow when passing through different heat exchange zones 31 of the heat exchange flat tube 3, enabling the airflow to pass through the heat exchanger more smoothly and improving the heat exchanger's heat exchange efficiency. It should be noted that louvered fins are existing technology and will not be described in detail here.

[0107] Each part of the bending zone 32 can be connected to the same second fin 5. Connecting the second fin 5 to the bending zone 32 fully utilizes the second fin 5 connected to the bending zone 32 to increase the heat exchange area, resulting in effective heat exchange, reducing the finless area of ​​the heat exchanger, and increasing the heat exchange capacity.

[0108] The second fin 5 can also be a louvered fin. Of course, the first fin 4 and the second fin 5 can also be fins of other structures, which are not limited in this article.

[0109] In this embodiment, at least one end of the heat exchange flat tube 3 is connected to the first manifold 1, and the other end is connected to the second manifold 2 (either all one end of the heat exchange flat tube 3 is connected to the first manifold 1 and the other end to the second manifold 2, or one end of the heat exchange flat tube 3 is connected to the first manifold 1 and the other end is not connected to the second manifold 2). To achieve the assembly of the first manifold 1, the second manifold 2 and the heat exchange flat tube 3, the wall of the first manifold 1 may be provided with a first mounting seam 11 communicating with its cavity, and the wall of the second manifold 2 may be provided with a second mounting seam communicating with its cavity. One end of the heat exchange flat tube 3 may be inserted into the first mounting seam 11 and sealed to the first mounting seam 11 so that one end of the heat exchange flat tube 3 is connected to the first manifold 1, and the other end of the heat exchange flat tube 3 may be inserted into the second mounting seam 12 and sealed to the second mounting seam 12 so that the other end of the heat exchange flat tube 3 is connected to the second manifold 2.

[0110] The diameters of the first manifold 1 and the second manifold 2 can be equal.

[0111] The diameters of the first manifold 1 and the second manifold 2 can also be different. In this structure, by adjusting the size of the first manifold 1 and the second manifold 2, the pressure changes inside the first manifold 1 and the second manifold 2 can be adjusted, thereby achieving the purpose of optimizing the refrigerant side pressure drop of the heat exchanger.

[0112] In the target operating mode, the heat exchanger in this embodiment can be used as a condenser. When the heat exchanger is used as a condenser, the axes of the first manifold 1 and the second manifold 2 are parallel. The first manifold 1 and the second manifold 2 can be located below the heat exchanger and are both arranged in a horizontal direction. The dimension of the heat exchanger in the first direction can be larger than the dimension of the heat exchanger in the length direction of the heat exchange flat tube 3 (i.e., the length direction of the heat exchange flat tube 3 is as follows). Figure 1 The Z direction in the heat exchange zone 31 can also be understood as the extension direction of the heat exchange flat tube 3. The length direction of the heat exchange flat tube 3 can be consistent with the vertical direction. That is to say, the dimension of the heat exchanger in the axial direction of the first manifold 1 and the second manifold 2 can be greater than the dimension of the heat exchanger in the direction perpendicular to the horizontal plane (i.e., in the vertical direction).

[0113] In the prior art, the first manifold 1 and the second manifold 2 of the condenser are placed vertically, while the heat exchange flat tube 3 is placed horizontally. However, because the length of the heat exchange flat tube 3 is relatively long, while the height of the first manifold 1 and the second manifold 2 along their axes is relatively short, the number of heat exchange flat tubes 3 is relatively small, resulting in a smaller refrigerant flow cross-sectional area. Therefore, heat exchange flat tubes 3 with a relatively large flow cross-sectional area are required to meet the requirements for refrigerant resistance drop (because excessive refrigerant resistance will lead to a reduction in heat exchanger performance).

[0114] In this embodiment, the first manifold 1 and the second manifold 2 are placed horizontally, and the horizontal length of the heat exchanger core is greater than its vertical length. Compared to the scheme where the first manifold 1 and the second manifold 2 are placed vertically and the heat exchange flat tubes 3 are placed horizontally, this embodiment can accommodate more heat exchange flat tubes 3, which can increase the flow cross-sectional area of ​​the inlet of the heat exchange flat tubes 3, reduce the refrigerant flow rate, and since the overall flow length on the refrigerant side is also shorter than when placed horizontally, it can reduce the overall resistance on the refrigerant side, thereby improving the heat exchange performance of the heat exchanger.

[0115] Of course, in other target operating modes, the heat exchanger of this application embodiment can also be used as an evaporator or other device with other heat exchange functions, and this application does not limit it.

[0116] As can be seen from the above, there are various structures of the heat exchange flat tube 3 in the embodiments of this application, the diameters of the first manifold 1 and the second manifold 2 can be the same or different, and there are also various structures of the fins connected to the heat exchange flat tube 3. Therefore, heat exchange flat tubes 3 with different structures can be adapted to fins with different structures and to first manifolds 1 and second manifolds 2 with the same or different diameters to form heat exchangers with various different embodiments.

[0117] In the heat exchanger of the first embodiment, please refer to Figures 1 to 3 It includes, for example Figure 15The heat exchange flat tube 3 of the fourth structure shown has a protrusion 321 in the bending region 32 in the width direction. The protrusion 321 protrudes to one side relative to the two heat exchange regions 31. The outer edge extension line of one heat exchange region 31 intersects with the bending region 32, while the outer edge extension line of the other heat exchange region 31 does not intersect with the bending region 32. The heat exchange flat tube 3 also includes a first connecting region 33 connecting the heat exchange region 31 and the first manifold 1. The first connecting region 33 and the other heat exchange region 31 have an angle so that the first connecting region 33 extends away from the other heat exchange region 31. A first fin 4 is connected between any two adjacent heat exchange flat tubes 3, and the two heat exchange regions 31 of the same heat exchange flat tube 3 share the same first fin 4. The bending region 32 of the heat exchange flat tube 3 is not connected with fins. The first manifold 1 and the second manifold 2 have the same diameter.

[0118] In the heat exchanger of the second embodiment, please refer to Figure 4 and Figure 5 It includes, for example Figure 15 The heat exchange flat tube 3 of the fourth structure shown (the specific structure will not be described in detail) has no fins connected to the bending area 32 of the heat exchange flat tube 3. The heat exchanger of the second embodiment is different from the heat exchanger of the first embodiment in that: in the same heat exchange flat tube 3, two different heat exchange zones 31 are connected to two first fins 4, the two first fins 4 are separated from each other, and each heat exchange zone 31 is connected to an independent first fin 4. The diameter of the first manifold 1 and the second manifold 2 is the same.

[0119] In the heat exchanger of the third embodiment, please refer to Figures 6 to 8 It includes, for example Figure 15 The heat exchange flat tube 3 of the fourth structure shown (the specific structure will not be described in detail) has a first fin 4 connecting the heat exchange zones 31 of any two adjacent heat exchange flat tubes 3. The two heat exchange zones 31 of the same heat exchange flat tube 3 share the same first fin 4. A second fin 5 is connected between the bending zones 32 of any two adjacent heat exchange flat tubes 3, and the width of the second fin 5 is greater than the width of the first fin 4. The diameter of the first manifold 1 and the second manifold 2 is the same.

[0120] In the heat exchanger of the fourth embodiment, please refer to Figure 9 and Figure 10 It includes, for example Figure 15 The heat exchange flat tube 3 of the fourth structure shown (the specific structure will not be described in detail) has a first fin 4 connecting the heat exchange zones 31 of any two adjacent heat exchange flat tubes 3. The two heat exchange zones 31 of the same heat exchange flat tube 3 share the same first fin 4. The bending zone 32 of the heat exchange flat tube 3 is not connected to the fin. The diameters of the first manifold 1 and the second manifold 2 are different.

[0121] Of course, the heat exchanger in this application is not limited to the structure of the above four embodiments. For example, by replacing the heat exchange flat tube 3 in the above four embodiments with the heat exchange flat tube 3 of the first structure, the second structure, the third structure, the fifth structure, the sixth structure, or the seventh structure, six different embodiments of heat exchangers can be obtained. Similarly, by changing the pipe diameter of the first manifold 1 and the second manifold 2 in the above six embodiments, or by changing the structure of the fins connected to the heat exchange flat tube 3, a variety of different embodiments of heat exchangers can be obtained. These will not be elaborated here.

[0122] like Figure 23 As shown in the embodiments of this application, a method for manufacturing a heat exchanger is also disclosed, for manufacturing the aforementioned heat exchanger. The manufacturing method includes:

[0123] S101, Bending heat exchange flat tube 3.

[0124] Before assembling the heat exchanger, the heat exchange flat tube 3 is pre-bent so that all parts of the heat exchange flat tube 3 after bending can be located on the same plane.

[0125] S102. Connect the fins to two adjacent heat exchange flat tubes 3, and connect the two heat exchange zones 31 located at both ends of the heat exchange flat tubes 3 to the first manifold 1 and the second manifold 2 respectively, so that the heat exchange flat tubes 3 are connected to the first manifold 1 and the second manifold 2.

[0126] The fins can be connected to two adjacent heat exchange flat tubes 3 by welding. The fins include a first fin 4 and a second fin 5. The first fin 4 is connected to the heat exchange zone 31 of the two adjacent heat exchange flat tubes 3, and the second fin 5 is connected to the bending zone 32 of the two adjacent heat exchange flat tubes 3.

[0127] It should be noted that in S102, the steps of connecting the fins to two adjacent heat exchange flat tubes 3 and connecting the two heat exchange zones 31 located at both ends of the heat exchange flat tubes 3 to the first manifold 1 and the second manifold 2 respectively are not limited in their order.

[0128] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0129] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0130] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0131] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0132] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0133] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A heat exchanger, characterized in that, Includes multiple heat exchange flat tubes (3) arranged along the first direction, wherein: At least some of the heat exchange flat tubes (3) each of the heat exchange flat tubes (3) includes a plurality of heat exchange zones (31) and a bending zone (32) connecting two adjacent heat exchange zones (31). The bending zone (32) is formed by bending along the width direction of the heat exchange flat tube (3). The width direction of the heat exchange flat tube (3) is perpendicular to the first direction. The width of the bending zone (32) is L1, and the width of each heat exchange zone (31) is L2, and L1>2xL2.

2. The heat exchanger according to claim 1, characterized in that, In any two adjacent heat exchange flat tubes (3), at least one of them has parts located on the same plane.

3. The heat exchanger according to claim 1, characterized in that, In each of the at least partially heat exchange flat tubes (3), two adjacent heat exchange zones (31) satisfy the parallel condition, and the minimum gap between two adjacent heat exchange zones (31) in the width direction is L3, L3+2L2<L1.

4. The heat exchanger according to claim 3, characterized in that, In the width direction, the bending area (32) has a protrusion (321) that protrudes to one side relative to the two heat exchange areas (31) connected to the bending area (32).

5. The heat exchanger according to claim 3, characterized in that, In the width direction, the bending area (32) has a protrusion (321) that protrudes to both sides relative to the two heat exchange areas (31) connected to the bending area (32).

6. The heat exchanger according to any one of claims 3 to 5, characterized in that, The bending zone (32) includes at least one first arc segment R1 and at least one second arc segment R2. The second arc segment R2 is connected to one end of the at least one first arc segment R1 that is close to the heat exchange zone (31). The centers of the first arc segment R1 and the second arc segment R2 are both located inside the heat exchange flat tube (3). The second arc segment R2 enables the two heat exchange zones (31) connected to the bending zone (32) to move closer to each other.

7. The heat exchanger according to claim 6, characterized in that, The bending zone (32) further includes at least one third arc segment R3, which is connected one-to-one with the end of the second arc segment R2 near the heat exchange zone (31). The center of the third arc segment R3 is located outside the heat exchange flat tube (3) so that the two heat exchange zones (31) connected to the bending zone (32) satisfy the parallel condition.

8. The heat exchanger according to any one of claims 1 to 5, characterized in that, The thickness of the bending zone (32) and the thickness of the heat exchange zone (31) satisfy the same conditions.

9. The heat exchanger according to any one of claims 1 to 5, characterized in that, The heat exchanger also includes a first manifold (1) and a second manifold (2), at least one end of the heat exchange flat tube (3) is connected to the first manifold (1), and the other end is connected to the second manifold (2); The diameters of the first manifold (1) and the second manifold (2) are different; or, The first manifold (1) and the second manifold (2) have the same diameter.

10. The heat exchanger according to claim 9, characterized in that, The heat exchange flat tube (3) further includes at least one connecting area, which is connected to the heat exchange area (31) and forms the end of the heat exchange flat tube (3) for connecting the first manifold (1) or the second manifold (2). The connecting area and the heat exchange area (31) connected thereto have an angle, so that the connecting area extends away from the adjacent heat exchange area (31).

11. The heat exchanger according to claim 9, characterized in that, The length of the heat exchange zone (31) connecting the first manifold (1) or the second manifold (2) is different from the length of the heat exchange zone (31) adjacent to it.

12. The heat exchanger according to claim 9, characterized in that, The first manifold (1) is a refrigerant inlet pipe, and a refrigerant distribution device is provided in the first manifold (1).

13. The heat exchanger according to claim 9, characterized in that, In the target operating mode, the heat exchanger is a condenser.

14. The heat exchanger according to claim 9, characterized in that, The first manifold (1) and the second manifold (2) are located on the lower side of the heat exchanger and are arranged horizontally.

15. The heat exchanger according to claim 1, characterized in that, The dimension of the heat exchanger in the first direction is greater than the dimension of the heat exchanger in the length direction of the heat exchange flat tube (3).

16. The heat exchanger according to any one of claims 1 to 5, characterized in that, The heat exchanger further includes a first fin (4), and the first fin (4) is connected between at least one pair of adjacent heat exchange flat tubes (3), and at least two heat exchange zones (31) of the same heat exchange flat tube (3) in the at least one pair of adjacent heat exchange flat tubes (3) are connected to the same first fin (4).

17. The heat exchanger according to claim 16, characterized in that, The heat exchanger also includes a second fin (5), which is connected between the bends (32) of at least one pair of adjacent heat exchange flat tubes (3).

18. The heat exchanger according to claim 1, characterized in that, Each part of at least one of the heat exchange flat tubes (3) is located in the same plane.

19. The heat exchanger according to claim 1, characterized in that, In two heat exchange zones (31) connected to the same bending region (32), the distance between the ends of the two heat exchange zones (31) connected to the bending region (32) is greater than the distance between the ends of the two heat exchange zones (31) away from the bending region (32), or, The distance between the ends of the two heat exchange zones (31) connected to the bending zone (32) is less than the distance between the ends of the two heat exchange zones (31) away from the bending zone (32).

20. The heat exchanger according to claim 1, characterized in that, The distance between two adjacent heat exchange zones (31) gradually decreases, remains constant, or gradually increases in the direction away from the bend zone (32) connected to them.

21. A method for manufacturing a heat exchanger, characterized in that, The manufacturing method for producing the heat exchanger according to any one of claims 1 to 20 comprises: The heat exchange flat tube (3) is bent; The fins are connected to two adjacent heat exchange flat tubes (3), and the two heat exchange zones (31) located at both ends of the heat exchange flat tubes (3) are connected to the first manifold (1) and the second manifold (2) respectively, so that the heat exchange flat tubes (3) are connected to the first manifold (1) and the second manifold (2).

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