Heat exchanger and heat exchanger manufacturing method

Abstract

A heat exchanger and a heat exchanger manufacturing method. The provided heat exchanger comprises a plurality of heat exchanger flat tubes (3) arranged in a first direction; each heat exchanger flat tube (3) among at least some of the heat exchanger flat tubes (3) comprises a plurality of heat exchange areas (31) and bending areas (32) connecting two adjacent heat exchange areas (31); each bending area (32) is formed by bending in the width direction of the corresponding heat exchanger flat tube (3); the width direction of each heat exchanger flat tube (3) is perpendicular to the first direction; the width of each bending area (32) is L1; the width of each heat exchange area (31) is L2; and L1 is greater than 2×L2. The solution can effectively mitigate the problem in the prior art that the heat exchange performance of a heat exchanger is affected because the bending areas (32) of the heat exchanger flat tubes (3) tend to accumulate dust and other impurities, thereby forming corrosive micro-environments that cause corrosion of the heat exchanger flat tubes (3).

Description

Heat exchanger and its manufacturing method 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, which are bent to form two heat exchange zones and a bend connecting the two zones. In related technologies, the bend is twisted relative to the heat exchange zones, causing it to bulge towards the adjacent heat exchange flat tube. In this structure, the bulging bend has a relatively large windward and leeward area (compared to the heat exchange zones). Dust and other impurities in the air are easily adsorbed in the windward area and are not easily carried away by the airflow. In high humidity conditions, the dust and impurities adsorbed in the windward area mix with the humid air, easily forming a corrosive microenvironment. This not only affects the heat exchanger's heat exchange efficiency but also corrodes the heat exchange flat tubes, thus affecting their normal operation. 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 related 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, embodiments of this application provide the following technical solutions.

[0005] In a first aspect, embodiments of this application provide a heat exchanger comprising 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 a first direction. The width of the bending zone is L1, and the width of each heat exchange zone is L2, where L1 > 2xL2.

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

[0008] In some embodiments, in each heat exchange flat tube at least partially, 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] In some embodiments, the bending region has a protrusion in the width direction, the protrusion protruding to one side relative to the two heat exchange regions connected to the bending region.

[0010] In some embodiments, the bending region has a protrusion in the width direction, the protrusion protruding to both sides relative to the two heat exchange regions connected to the bending region.

[0011] In some embodiments, 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 and second arc segments 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] In some embodiments, the bending zone further includes at least one third arc segment, which is connected one-to-one with one 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] In some embodiments, the thickness of the bending region and the thickness of the heat exchange region satisfy the same conditions.

[0014] In some embodiments, the heat exchanger further includes a first manifold and a second manifold, wherein at least one end of a portion of the heat exchange flat tube is connected to the first manifold and the other end is connected to the second manifold;

[0015] The diameters of the first and second manifolds are different; or,

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

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

[0018] In some embodiments, 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] In some embodiments, the first manifold is a refrigerant inlet pipe, and a refrigerant distribution device is provided in the first manifold.

[0020] In some embodiments, under the target operating mode, the heat exchanger is a condenser.

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

[0022] In some embodiments, 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] In some embodiments, the heat exchanger further includes a first fin, at least one pair of adjacent heat exchange flat tubes are connected to the first fin, and at least two heat exchange zones of the same heat exchange flat tube in at least one pair of adjacent heat exchange flat tubes are connected to the same first fin.

[0024] In some embodiments, the heat exchanger further includes a second fin, wherein the second fin is connected between the bends of at least one pair of adjacent heat exchange flat tubes.

[0025] In some embodiments, at least a portion of at least one heat exchange flat tube is located in the same plane.

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

[0027] The distance between the ends of the connecting bend of the two heat exchange zones is less than the distance between the ends of the two heat exchange zones that are far from the bend.

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

[0029] Secondly, embodiments of this application provide a method for manufacturing a heat exchanger, for manufacturing the aforementioned heat exchanger, the method comprising:

[0030] Bending 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 connected to the first manifold and the second manifold, respectively, so that the heat exchange flat tubes are connected to 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 merely embodiments of this application, and those skilled in the art can obtain other drawings based on the provided drawings without creative effort.

[0034] Figure 1 is a front view of a heat exchanger provided in an embodiment of this application.

[0035] Figure 2 is a side view of a heat exchanger provided in one embodiment of this application.

[0036] Figure 3 is an axonal view of a heat exchanger provided in one embodiment of this application.

[0037] Figure 4 is another front view of a heat exchanger provided in one embodiment of this application.

[0038] Figure 5 is a side view of a heat exchanger provided in one embodiment of this application.

[0039] Figure 6 is another axial view of a heat exchanger provided in one embodiment of this application.

[0040] Figure 7 is another front view of a heat exchanger provided in one embodiment of this application.

[0041] Figure 8 is another side view of a heat exchanger provided in one embodiment of this application.

[0042] Figure 9 is another front view of a heat exchanger provided in one embodiment of this application.

[0043] Figure 10 is another side view of a heat exchanger provided in one embodiment of this application.

[0044] Figure 11 is a schematic diagram of the first structure of the heat exchange flat tube provided in the embodiment of this application.

[0045] Figure 12 is a side view of the heat exchange flat tube shown in Figure 11.

[0046] Figure 13 is a schematic diagram of the second structure of the heat exchange flat tube provided in the embodiment of this application.

[0047] Figure 14 is a schematic diagram of the third structure of the heat exchange flat tube provided in the embodiment of this application.

[0048] Figure 15 is a schematic diagram of the fourth structure of the heat exchange flat tube provided in the embodiment of this application.

[0049] Figure 16 is a schematic diagram of the fifth structure of the heat exchange flat tube provided in the embodiment of this application.

[0050] Figure 17 is a schematic diagram of the sixth structure of the heat exchange flat tube provided in the embodiment of this application.

[0051] Figure 18 is a schematic diagram of the seventh structure of the heat exchange flat tube provided in the embodiment of this application.

[0052] Figure 19 is an exploded view of the heat exchanger provided in an embodiment of this application.

[0053] Figure 20 is a front view of the first fin provided in an embodiment of this application.

[0054] Figure 21 is a top view of the first fin provided in an embodiment of this application.

[0055] Figure 22 is a cross-sectional view along the AA direction in Figure 21.

[0056] Figure 23 is a flowchart of the manufacturing method of the heat exchanger provided in the embodiment of this application.

[0057] Reference numerals: 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, 30-Connection zone, 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

[0058] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0059] As shown in Figures 1 to 22, 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 a refrigerant distribution device 6 may be provided inside the first manifold 1. 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.

[0060] 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 sequentially through the first manifold 1, the heat exchange flat tubes 3, and the second manifold 2.

[0061] As shown in Figure 1, the coordinate system is defined by 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.

[0062] During the use of the heat exchanger, the airflow in the environment flows through the heat exchanger in the y direction.

[0063] 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.

[0064] 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.

[0065] In heat exchangers of related technologies, the bending area of ​​the heat exchange flat tubes twists and bulges towards the adjacent heat exchange flat tubes, even abutting or overlapping each other, causing an overlap area to form at the bending area of ​​two adjacent heat exchange flat tubes. This makes it difficult for airflow to pass through the bending area of ​​two adjacent heat exchange flat tubes, and makes it easy for dust and other impurities to accumulate in the overlap area. The accumulated dust and other impurities mix with humid air to form a corrosive microenvironment, further affecting the heat exchanger's heat exchange effect.

[0066] 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 related technologies, 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 the 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.

[0067] In some embodiments, 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, further ensuring that the bending area 32 will not protrude towards the heat exchange flat tube 3 adjacent to it, and ensuring that there is no overlapping area between two adjacent heat exchange flat tubes 3.

[0068] 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.

[0069] 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. For example, it can be 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 related art, with the torsional bending region protruding towards the adjacent heat exchange flat tube). Under this structure, the bending region 32 of 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.

[0070] 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 a structure in which all parts are located on the same plane (for example, such a heat exchange flat tube 3 is: the bending zone 32 is uneven in different parts due to processing errors, 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, the bending zone 32 is at an angle to the plane where the bending zone 32 is located due to process requirements).

[0071] 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 (for example, such heat exchange flat tubes 3 are: the heat exchange flat tubes 3 with torsional bending areas as described above, or the heat exchange flat tubes 3 formed by bending along the width direction as described 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.

[0072] 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 related technologies, 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.

[0073] 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.

[0074] Each heat exchange flat tube 3 may include two heat exchange zones 31 and one bend zone 32. Of course, the number of heat exchange zones 31 and bend zones 32 may also be other, for example, including four heat exchange zones 31 and two bend zones 32. The accompanying drawings in this specification illustrate a heat exchange flat tube 3 with two heat exchange zones 31 and one bend zone 32.

[0075] 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 bending direction (i.e., the inner arc edge and the outer arc edge 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Optionally, L3 can approach zero or be equal to zero.

[0080] It should be noted that the parallel condition for 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 two adjacent heat exchange zones 31 is small, such as less than 10 degrees.

[0081] 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 be varied. The bending zone 32 includes at least one first arc segment R1 and at least one second arc segment R2 (in the case where the bending zone 32 includes multiple first arc segments R1, the multiple first arc segments R1 can be connected in sequence). The second arc segment R2 is connected to the end of the whole formed by connecting all the first arc segments 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 on the inner side of 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 segment R1 is point a shown in Figure 11, and the center of the second arc segment R2 is point b shown in Figure 11. 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.

[0082] The bending zone 32 may also include 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 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 segment R3 is point c shown in Figure 11), so that the two heat exchange zones 31 connected to the bending zone 32 satisfy the parallel condition.

[0083] 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.

[0084] 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.

[0085] There are various structures for the heat exchange flat tube 3 that is bent along the width direction to form the bending zone 32.

[0086] In the first type of heat exchange flat tube 3, referring again to Figure 11, the bending region 32 has a protrusion 321 in the width direction. The protrusion 321 protrudes to one side relative to the two heat exchange regions 31 connected to the bending region 32, and the lengths of the two (or more) heat exchange regions 31 are equal. 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 connected sequentially 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.

[0087] In the heat exchange flat tube 3 of the first structure, the two heat exchange zones 31 connected to the same bending zone 32 are parallel. Among the two heat exchange zones 31 connected to the same bending zone 32, the outer edge extension line of one heat exchange zone 31 (the dashed line segment in Figure 11) intersects the bending zone 32, while the outer edge extension line of the other heat exchange zone 31 does not intersect the bending zone 32 (they may be tangent or have a certain distance). It should be noted that the outer edge extension line of the heat exchange zone 31 refers to the edge extension line away from the other heat exchange zone 31.

[0088] In the second type of heat exchange flat tube 3, referring again to Figure 13, the 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.

[0089] In the heat exchange flat tube 3 of the second structure, in the two heat exchange zones 31 connected to the bending zone 32, the outer extension lines of the two heat exchange zones 31 (the two dashed line segments in Figure 13) intersect with the bending zone 32.

[0090] In the third type of heat exchange flat tube 3, referring again to Figure 14, 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, which protrudes to both sides relative to the two heat exchange zones 31 connected to the bending zone 32. The lengths of the two heat exchange zones 31 are different. 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.

[0091] 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.

[0092] 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.

[0093] Examples of heat exchange flat tubes 3 that may include one or two connecting regions are shown below. In a fourth type of heat exchange flat tube 3, referring again to Figure 15, two heat exchange regions 31 connected on the same bending region 32 are parallel. In the width direction, the bending region 32 has a protrusion 321 that protrudes to one side relative to the two heat exchange regions 31 connected to 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. This structure facilitates the connection of the two heat exchange regions 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.

[0094] In the fifth type of heat exchange flat tube 3, referring again to Figure 16, 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, which 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 have an angle, and the second connecting zone 34 and the heat exchange zone 31 connected to it also have an angle. The first connecting zone 33 and the second connecting zone 34 extend in directions 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.

[0095] In the sixth type of heat exchange flat tube 3, please refer again to Figure 17. The 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 moves closer to 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 greater than the distance between the ends of the two heat exchange zones 31 that are away from the bending zone 32.

[0096] In the seventh type of heat exchange flat tube 3, please refer again to Figure 18. The 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.

[0097] Of course, in some embodiments, the distance between two adjacent heat exchange zones 31 can gradually decrease in the direction away from the bend 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] The first fin 4 can be a louvered fin as shown in Figures 20-21, including a base plate 41 and window 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 the 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.

[0105] 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.

[0106] The second fin 5 can also be a louver 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.

[0107] 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, while 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 communicates with 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 communicates with the second manifold 2.

[0108] The diameters of the first manifold 1 and the second manifold 2 can be equal.

[0109] The diameters of the first manifold 1 and the second manifold 2 can also be unequal. 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.

[0110] 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, and the first manifold 1 and the second manifold 2 can be located on the lower side of 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 (the length direction of the heat exchange flat tube 3 is the Z direction in Figure 1, which can also be understood as the extension direction of the heat exchange zone 31). 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 larger than the dimension of the heat exchanger in the direction perpendicular to the horizontal plane (i.e., in the vertical direction).

[0111] In the related technology, 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, and the flow cross-sectional area of ​​the refrigerant is relatively small. Therefore, heat exchange flat tubes 3 with a relatively large flow cross-sectional area are required to meet the requirements of refrigerant resistance drop (because excessive refrigerant resistance will lead to a reduction in heat exchanger performance).

[0112] 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, increasing the flow cross-sectional area at the inlet of the heat exchange flat tubes 3, reducing the refrigerant flow rate, and since the overall flow length on the refrigerant side is also shorter than when placed horizontally, the overall resistance on the refrigerant side can be reduced, thereby improving the heat exchange performance of the heat exchanger.

[0113] 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.

[0114] As can be seen from the above, the heat exchange flat tube 3 in this application embodiment has various structures. The diameters of the first manifold 1 and the second manifold 2 can be the same or different, and the structures of the fins connected to the heat exchange flat tube 3 also vary. 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.

[0115] In the heat exchanger of the first embodiment, referring to Figures 1 to 3, it includes a heat exchange flat tube 3 with a fourth structure as shown in Figure 15. In the width direction, the bending region 32 has a protrusion 321 that protrudes to one side relative to the two heat exchange regions 31. The outer edge extension of one heat exchange region 31 intersects with the bending region 32, while the outer edge extension 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 regions 31 and the first manifold 1. The first connecting region 33 and the other heat exchange region 31 have an angle, such that the first connecting region 33 extends away from the other heat exchange region 31. A first fin 4 connects 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 to fins, and the first manifold 1 and the second manifold 2 have the same diameter.

[0116] In the heat exchanger of the second embodiment, please refer to Figures 4 and 5. It includes a heat exchange flat tube 3 with the fourth structure shown in Figure 15 (the specific structure will not be described in detail). The bending section 32 of the heat exchange flat tube 3 is not connected to fins. The heat exchanger of the second embodiment differs 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 separate from each other, and each heat exchange zone 31 is connected to an independent first fin 4. The first manifold 1 and the second manifold 2 have the same diameter.

[0117] In the heat exchanger of the third embodiment, please refer to Figures 6 to 8. It includes a heat exchange flat tube 3 with the fourth structure shown in Figure 15 (the specific structure will not be described in detail). A first fin 4 is connected between 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. The width of the second fin 5 is greater than the width of the first fin 4. The diameters of the first manifold 1 and the second manifold 2 are the same.

[0118] In the heat exchanger of the fourth embodiment, please refer to Figures 9 and 10. It includes a heat exchange flat tube 3 with the fourth structure shown in Figure 15 (the specific structure will not be described in detail). A first fin 4 is connected between 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.

[0119] Of course, the heat exchanger in this application is not limited to the structures of the four embodiments described above. For example, by replacing the heat exchange flat tube 3 in the four embodiments with heat exchange flat tubes of the first, second, third, fifth, sixth, or seventh structures, six different heat exchanger embodiments can be obtained. Similarly, by changing the diameters of the first manifold 1 and the second manifold 2 in the six embodiments, and by changing the structure of the fins connected to the heat exchange flat tube 3, various other heat exchanger embodiments can be obtained, which will not be elaborated here.

[0120] As shown in Figure 23, this application also discloses a method for manufacturing a heat exchanger, used to manufacture the aforementioned heat exchanger. The manufacturing method includes:

[0121] S101, Bending heat exchange flat tube 3.

[0122] 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.

[0123] 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.

[0124] 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 two adjacent heat exchange flat tubes 3, and the second fin 5 is connected to the bending zone 32 of two adjacent heat exchange flat tubes 3.

[0125] It should be noted that in S102, the order of 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 is not limited.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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 by, 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), and the width direction of the heat exchange flat tube (3) is perpendicular to the first direction.

2. The heat exchanger of claim 1, wherein The width of the bending area (32) is L1, and the width of each heat exchange area (31) is L2, and L1>2×L2.

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

4. The heat exchanger according to any one of claims 1 to 3, 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.

5. The heat exchanger of claim 4, wherein 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).

6. The heat exchanger of claim 4, wherein 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).

7. The heat exchanger according to any one of claims 1 to 6, 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.

8. The heat exchanger according to claim 7, 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.

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

10. The heat exchanger according to any one of claims 1 to 9, 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.

11. The heat exchanger of claim 10, wherein The heat exchange flat tube (3) further includes at least one connecting region (30), which is connected to the heat exchange region (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 region (30) and the heat exchange region (31) connected thereto have an angle so that the connecting region (30) extends away from the adjacent heat exchange region (31).

12. The heat exchanger according to claim 10 or 11, 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.

13. The heat exchanger according to any one of claims 10 to 12, characterized in that The first manifold (1) is a refrigerant inlet pipe, and a refrigerant distribution device is provided in the first manifold (1).

14. The heat exchanger according to any one of claims 10 to 13, characterized in that In the target operating mode, the heat exchanger is a condenser.

15. The heat exchanger according to any one of claims 9 to 14, 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.

16. The heat exchanger according to any one of claims 1 to 15, 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).

17. The heat exchanger according to any one of claims 1 to 16, 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).

18. The heat exchanger of claim 17, wherein, 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).

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

20. The heat exchanger according to any one of claims 1 to 19, 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).

21. The heat exchanger according to any one of claims 1 to 19, 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.

22. A method of manufacturing a heat exchanger, characterized by: The method for manufacturing a heat exchanger according to any one of claims 1 to 21 comprises: Bending the heat exchange flat tube (3); and 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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