Heat exchanger

Abstract

The present disclosure belongs to the technical field of heat exchange. Provided is a heat exchanger. The heat exchanger comprises a first header, a second header, a third header, a fourth header, a heat exchange tube assembly, and a fin assembly, wherein the first header and the second header are located in a first plane; the heat exchange tube assembly comprises first heat exchange flat tubes and second heat exchange flat tubes, two ends of each first heat exchange flat tube are respectively connected to the first header and the second header, and each second heat exchange flat tube comprises a straight section and two bent sections, the straight section being located in the first plane and spaced apart from the first heat exchange flat tubes, and two ends of the straight section each being connected to one end of one of the two bent sections; and the fin assembly comprises a plurality of first fins, a plurality of positioning structures and a plurality of second fins, the first fins each being connected between adjacent first heat exchange flat tubes and a straight section, the positioning structures each being sleeved outside at least one of a bent section and an end of a first heat exchange flat tube, and the second fins being connected to the positioning structures. The present disclosure can improve the heat exchange efficiency of the heat exchanger.

Description

heat exchanger

[0001] This application claims priority to Chinese Patent Application No. 202510355985.8, filed on March 25, 2025, entitled "Heat Exchanger", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure belongs to the field of heat exchange technology, and specifically relates to a heat exchanger. Background Technology

[0003] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid.

[0004] Heat exchangers are widely used in various refrigeration systems due to their excellent heat exchange performance.

[0005] The heat exchanger of the dual heat exchange system includes two first manifolds and two second manifolds. Multiple first heat exchange flat tubes are connected between the two first manifolds, and multiple second heat exchange flat tubes are connected between the two second manifolds. The portion of each second heat exchange flat tube near its end is bent from the second manifold towards the first heat exchange flat tube, so that the middle portion of each second heat exchange flat tube can alternately overlap with the middle portion of each first heat exchange flat tube.

[0006] However, since the two ends of the second heat exchange flat tube are bent, the space at the bend and the space at the end of the first heat exchange flat tube near the bend are relatively small, making it difficult to install fins, which leads to a reduction in the heat exchange efficiency of the heat exchanger. Summary of the Invention

[0007] This disclosure provides a heat exchanger that can improve heat exchange efficiency without increasing assembly difficulty. The technical solution is as follows:

[0008] This disclosure provides a heat exchanger comprising a first manifold, a second manifold, a third manifold, a fourth manifold, a heat exchange tube assembly, and a fin assembly. The first and second manifolds are located in a first plane, and the third and fourth manifolds are located in a second plane, with the first and second planes spaced apart. The heat exchange tube assembly includes a first heat exchange flat tube and a second heat exchange flat tube. The two ends of the first heat exchange flat tube are respectively connected to the first and second manifolds, and the second heat exchange flat tube includes a straight section and two bends. The straight section is located on the first plane and spaced apart from the first heat exchange flat tube. The two ends of the straight section are respectively connected to one end of the two bent sections, and the other ends of the two bent sections are respectively connected to the third manifold and the fourth manifold. The fin assembly includes a plurality of first fins, a plurality of positioning structures and a plurality of second fins. The first fins are connected between adjacent first heat exchange flat tubes and the straight section. The positioning structures are sleeved on at least one of the ends of the bent sections and the first heat exchange flat tubes. The second fins are connected to the positioning structures.

[0009] Optionally, the positioning structure includes a first positioning plate and a plurality of first positioning ribs; the first positioning plate is connected to the side of the bent section or the side of the first heat exchange flat tube; the plurality of first positioning ribs are arranged at intervals along the length direction of the first positioning plate, and the plurality of first positioning ribs are respectively connected to the first positioning plate; the second fin is connected to the corresponding first positioning rib.

[0010] Optionally, the second fin includes a plurality of V-shaped structures arranged in sequence; the length direction of the ridge of the second fin is consistent with the length direction of the first positioning rib, and the ridge of the second fin is connected to the first positioning rib.

[0011] Optionally, the two sides extending along the length direction of the first positioning piece are respectively the first side and the second side, and the first positioning rib is connected to both the first side and the second side. The first positioning rib connected to the first side and the first positioning rib connected to the second side are respectively located on opposite sides of the bent section, or respectively located on opposite sides of the first heat exchange flat tube.

[0012] Optionally, the first positioning rib located on one side of the first positioning piece extending along the length direction corresponds one-to-one with the first positioning rib located on the other side of the first positioning piece extending along the length direction and is parallel to each other.

[0013] Optionally, the positioning structure includes a second positioning piece; the second positioning piece has a first connecting surface and a second connecting surface arranged opposite to each other, the first connecting surface being connected to the second fin, and the second connecting surface being connected to the bent section or the first heat exchange flat tube.

[0014] Optionally, one side of the second positioning piece is bent toward the side where the second connecting surface is located to form a first positioning groove, and the first positioning groove is sleeved outside the side of the bent section or the side of the first heat exchange flat tube.

[0015] Optionally, the second fin includes a plurality of V-shaped structures arranged in sequence; the positioning structure further includes a plurality of second positioning ribs, which are spaced apart on the first connecting surface along the length direction of the second positioning piece; the length direction of the ridge of the second fin is consistent with the length direction of the second positioning rib, and the ridge of the second fin is connected to the second positioning rib.

[0016] Optionally, the second fin includes a plurality of V-shaped structures arranged in sequence; the positioning structure further includes a plurality of third positioning ribs, which are located on one side of the first positioning groove and are spaced apart along the length direction of the second positioning fin, and the plurality of third positioning ribs are respectively connected to the first positioning groove; the length direction of the ridge of the second fin is consistent with the length direction of the third positioning rib, and the ridge of the second fin is connected to the third positioning rib.

[0017] Optionally, the positioning structure includes a third positioning piece and a fourth positioning piece; the third positioning piece has a third connecting surface and a fourth connecting surface arranged opposite to each other, one side of the third positioning piece is bent toward the side where the fourth connecting surface is located to form a second positioning groove, the second positioning groove being sleeved outside the side of the bent section or the side of the first heat exchange flat tube; the fourth positioning piece is located on the side of the fourth connecting surface opposite to the third connecting surface, and the fourth positioning piece is connected to the second positioning groove; the second fin is connected to the side of the fourth positioning piece opposite to the third positioning piece.

[0018] Optionally, the fourth connecting surface is connected to the bent section, and the side of the fourth positioning piece facing the fourth connecting surface is connected to the first heat exchange flat tube; or, the fourth connecting surface is connected to the first heat exchange flat tube, and the side of the fourth positioning piece facing the fourth connecting surface is connected to the bent section.

[0019] Optionally, the second fin is located on the side of the fourth positioning piece away from the second positioning groove.

[0020] Optionally, the positioning structure and the corresponding second fin are an integral structural component.

[0021] Optionally, the second fin includes a plurality of second sub-fins; the plurality of second sub-fins are arranged sequentially along the length direction of the fourth positioning plate, and in two adjacent second sub-fins, one second sub-fin is inclined toward the second positioning groove, and the other second sub-fin is inclined away from the second positioning groove.

[0022] Optionally, the positioning structure is an integral structural component.

[0023] Optionally, a portion of the plurality of positioning structures is a first positioning structure, and another portion of the positioning structures is a second positioning structure; the first positioning structure is sleeved outside the bent section, and the second positioning structure is sleeved outside the first heat exchange flat tube.

[0024] Optionally, the first positioning structure and the second positioning structure have the same structure, or the first positioning structure and the second positioning structure have different structures.

[0025] Optionally, along the length of the first manifold, at least one side of the first positioning structure has the second fin, and both sides of the second positioning structure have the second fin.

[0026] Optionally, the first heat exchange flat tube includes a main body section and two connecting sections; the two ends of the main body section are respectively connected to one end of the connecting section, and the other ends of the two connecting sections are respectively connected to the first manifold and the second manifold.

[0027] Optionally, along the length of the first manifold, the main body segment and the straight segment are arranged alternately at intervals. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the structure of a heat exchanger in a dual heat exchange system in the related technology;

[0030] Figure 2 is a schematic diagram of a heat exchanger provided in an embodiment of this disclosure;

[0031] Figure 3 is a magnified view of a portion of region A in Figure 2;

[0032] Figure 4 is a schematic diagram of the connection structure between a positioning structure and the corresponding second fin.

[0033] Figure 5 is a schematic diagram of the positioning structure in Figure 4;

[0034] Figure 6 is a schematic diagram of the bent positioning structure connecting a second fin;

[0035] Figure 7 is a schematic diagram of the bent positioning structure connecting the two second fins;

[0036] Figure 8 is a schematic diagram of another positioning structure and the connection structure of the corresponding second fin.

[0037] Figure 9 is a schematic diagram of the positioning structure in Figure 8;

[0038] Figure 10 is a schematic diagram of another positioning structure;

[0039] Figure 11 is a schematic diagram of the connection structure between the positioning structure and the second fin shown in Figure 10;

[0040] Figure 12 is a schematic diagram of the connection structure between another positioning structure and the corresponding second fin.

[0041] Figure 13 is a schematic diagram of another heat exchanger provided in an embodiment of this disclosure;

[0042] Figure 14 is a partial enlarged view of the structure of region B in Figure 13.

[0043] The symbols in the diagram represent the following meanings: 1, 1', First manifold; 2, 2', Second manifold; 3, Third manifold; 4, Fourth manifold; 5, Heat exchanger tube assembly; 51, 3', First heat exchanger flat tube; 511, Main body section; 512, Connecting section; 52, 4', Second heat exchanger flat tube; 521, Straight section; 522, Bent section; 6. Fin assembly; 61. First fin; 62. Positioning structure; 621. First positioning structure; 622. Second positioning structure; 6201. First positioning piece; 62011. First side; 62012. Second side; 6202. First positioning rib; 6203. Second positioning piece; 62031. First positioning groove; 6204. Second positioning rib; 6205. Third positioning rib; 6206. Third positioning piece; 62061. Second positioning groove; 6207. Fourth positioning piece; 6211. First connecting surface; 6212. Second connecting surface; 6213. Third connecting surface; 6214. Fourth connecting surface; 63. Second fin; 631. Second sub-fin. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0045] Figure 1 is a schematic diagram of the structure of a heat exchanger in a dual heat exchange system in the related art. Referring to Figure 1, the heat exchanger of the dual heat exchange system includes two first manifolds 1' and two second manifolds 2'. Multiple first heat exchange flat tubes 3' are connected between the two first manifolds 1', and multiple second heat exchange flat tubes 4' are connected between the two second manifolds 2'. The portion of each second heat exchange flat tube 4' near its end is bent from the second manifold 2' toward the first heat exchange flat tube 3', so that the middle portion of each second heat exchange flat tube 4' can be staggered and overlapped with the middle portion of each first heat exchange flat tube 3'. To reduce assembly difficulties, fins are generally not provided at the connection points between the first heat exchange flat tubes 3' and the first manifolds 1', and at the connection points between the second heat exchange flat tubes 4' and the second manifolds 2'.

[0046] In a dual heat exchanger system, the heat exchanger tubes can contain different heat exchange media. For example, the heat exchanger tube 3' and the two first manifolds 1' can contain water, while the heat exchanger tube 4' and the two second manifolds 2' can contain oil. Of course, the heat exchanger media can also be the same.

[0047] Figure 2 is a schematic diagram of a heat exchanger provided in an embodiment of the present disclosure. As shown in Figure 2, the heat exchanger includes a first manifold 1, a second manifold 2, a third manifold 3, a fourth manifold 4, a heat exchange tube assembly 5, and a fin assembly 6. The first manifold 1 and the second manifold 2 are located in a first plane, and the third manifold 3 and the fourth manifold 4 are located in a second plane. The first plane and the second plane are spaced apart.

[0048] For example, the first manifold 1, the second manifold 2, the third manifold 3, and the fourth manifold 4 are parallel to each other, and the first plane and the second plane are parallel to each other.

[0049] Figure 3 is a partial enlarged view of region A in Figure 2. Referring to Figure 3, the heat exchanger tube assembly 5 includes a first heat exchange flat tube 51 and a second heat exchange flat tube 52. The two ends of the first heat exchange flat tube 51 are connected to the first manifold 1 and the second manifold 2, respectively. The second heat exchange flat tube 52 includes a straight section 521 and two bent sections 522. The straight section 521 is located on a first plane and spaced apart from the first heat exchange flat tube 51. The two ends of the straight section 521 are connected to one end of each of the two bent sections 522, and the other ends of each of the two bent sections 522 are connected to the third manifold 3 and the fourth manifold 4, respectively.

[0050] For example, there are multiple first heat exchange flat tubes 51 and multiple second heat exchange flat tubes 52. The multiple first heat exchange flat tubes 51 are arranged at intervals along the length direction of the first manifold 1, and the multiple second heat exchange flat tubes 52 are arranged at intervals along the length direction of the first manifold 1.

[0051] The fin assembly 6 includes a plurality of first fins 61, a plurality of positioning structures 62 and a plurality of second fins 63. The first fins 61 are connected between adjacent first heat exchange flat tubes 51 and straight sections 521. The positioning structures 62 are sleeved on at least one of the bent sections 522 and the ends of the first heat exchange flat tubes 51. The second fins 63 are connected to the positioning structures 62.

[0052] In the heat exchanger provided in this disclosure, the first fin 61 is connected between adjacent first heat exchange flat tubes 51 and straight sections 521, thus enabling heat dissipation at the straight sections 521 of the first and second heat exchange flat tubes 51 and 521. In addition, the fin assembly 6 includes multiple positioning structures 62 and multiple second fins 63. The multiple positioning structures 62 are sleeved around at least one of the bent sections 522 and the ends of the first heat exchange flat tubes 51. The second fins 63 are connected to the positioning structures 62, allowing the second fins 63 to be installed through the positioning structures 62, thereby dissipating heat from the ends of the first heat exchange flat tubes 51 and the bent sections 522 of the second heat exchange flat tubes 52, improving the overall heat exchange efficiency of the heat exchanger.

[0053] It is worth noting that when the first component is fitted over the second component, it means that the first component covers at least a portion of the outer wall of the second component, allowing the first and second components to be assembled together. For example, when the positioning structure 62 is fitted over the first heat exchange flat tube 51, it means that the positioning structure 62 covers at least a portion of the outer wall of the first heat exchange flat tube 51, allowing the positioning structure 62 and the first heat exchange flat tube 51 to be assembled together.

[0054] In this embodiment, the first heat exchange flat tube 51 includes a main body section 511 and two connecting sections 512. The two ends of the main body section 511 are respectively connected to one end of the connecting section 512, and the other ends of the two connecting sections 512 are respectively connected to the first manifold 1 and the second manifold 2.

[0055] In this embodiment, each second heat exchange flat tube 52 is located between two adjacent first heat exchange flat tubes 51, that is, a second heat exchange flat tube 52 is provided between two adjacent first heat exchange flat tubes 51.

[0056] In this case, along the length of the first manifold 1, the main body section 511 and the straight section 521 are arranged alternately and at intervals.

[0057] In other examples, two or three second heat exchange flat tubes 52 may also be provided between two adjacent first heat exchange flat tubes 51.

[0058] In this embodiment of the disclosure, a second heat exchange flat tube 52 is set between two adjacent first heat exchange flat tubes 51 for illustration.

[0059] As mentioned above, the positioning structure 62 is the key to realizing the installation of the second fin 63. The positioning structure will be explained below.

[0060] Referring to Figure 3, in this embodiment, one part of the multiple positioning structures 62 is the first positioning structure 621, and the other part of the positioning structures 62 is the second positioning structure 622. The first positioning structure 621 is sleeved outside the bent section 522, and the second positioning structure 622 is sleeved outside the first heat exchange flat tube 51.

[0061] In the above implementation, the first positioning structure 621 is sleeved on the bending section 522 and the second positioning structure 622 is sleeved on the connecting section 512, which allows fins to be connected at the ends of the first heat exchange flat tube 51 and the second heat exchange flat tube 52, thereby further improving the heat exchange efficiency.

[0062] In this embodiment, a plurality of first positioning structures 621 correspond one-to-one with all the bent sections 522 of the second heat exchange flat tubes 52, and the first positioning structure 621 is sleeved on the outside of the corresponding bent section 522. A plurality of second positioning structures 622 correspond one-to-one with all the connecting sections 512 of the first heat exchange flat tubes 51, and the second positioning structure 622 is sleeved on the outside of the corresponding connecting section 512. Along the length direction of the second heat exchange flat tubes 52, a plurality of second fins 63 are respectively connected to a plurality of first positioning structures 621 and a plurality of second positioning structures 622 in a one-to-one correspondence.

[0063] For example, along the length direction of the first manifold 1, at least one side of the first positioning structure 621 has a second fin 63, and both sides of the second positioning structure 622 have second fins 63.

[0064] In other words, the first positioning structure 621 allows for the installation of the second fin 63 on one side of the bend section 522 of the second heat exchange flat tube 52, which facilitates assembly. Alternatively, the second fin 63 can be installed on both sides of the bend section 522 of the second heat exchange flat tube 52, thereby improving heat exchange efficiency.

[0065] In this embodiment, the first positioning structure 621 and the second positioning structure 622 can have various structural forms, as long as they can be fitted over the bent section 522 or the connecting section 512 to facilitate connection of the second fin 63. This disclosure does not impose any limitations on this. Furthermore, the structures of the first positioning structure 621 and the second positioning structure 622 can be the same or different. That is to say, the structural forms of the first positioning structure 621 and the second positioning structure 622 can be arbitrarily selected from the structural forms exemplified below.

[0066] In this embodiment of the disclosure, the following different structures are listed to further illustrate the positioning structure 62.

[0067] (1) The structure of the first positioning structure 621 and the second positioning structure 622 is the first type of structure.

[0068] Figure 4 is a schematic diagram of the connection structure between a positioning structure and a corresponding second fin. Referring to Figure 4, optionally, the positioning structure 62 includes a first positioning piece 6201 and a plurality of first positioning ribs 6202. The first positioning piece 6201 is connected to the side of the bent section 522 or the side of the first heat exchange flat tube 51.

[0069] Figure 5 is a schematic diagram of the positioning structure in Figure 4. Referring to Figure 5, multiple first positioning ribs 6202 are arranged at intervals along the length of the first positioning piece 6201, and each of the multiple first positioning ribs 6202 is connected to the first positioning piece 6201. The second fin 63 is connected to the corresponding first positioning rib 6202.

[0070] In the above implementation, the first positioning rib 6202 is used to connect with the second fin 63. The first positioning piece 6201 is used to fit against the side of the bent section 522 or the connecting section 512.

[0071] In this embodiment, the second fin 63 includes a plurality of V-shaped structures arranged in sequence. The length direction of the ridge of the second fin 63 is consistent with the length direction of the first positioning rib 6202, and the ridge of the second fin 63 is connected to the first positioning rib 6202.

[0072] A V-shaped structure consists of two single fins arranged at an angle with their long sides connected. The connected long sides form the ridge of the V-shaped structure.

[0073] Each V-shaped structure can form an orthographic projection on the plane where the bending segment 522 or connecting segment 512 is located. Assume the length of each orthographic projection is L, and the length of each bending segment 522 or connecting segment 512 is W. Then the number n of V-shaped structures installed satisfies: n ≤ W / L. The height H of the V-shaped structure ≤ the spatial distance between adjacent first heat exchange flat tubes 51 and second heat exchange flat tubes 52.

[0074] The above V-shaped structure can be a fin with a window or other forms of fin, and this disclosure does not limit it.

[0075] The first fin 61 also includes multiple V-shaped structures arranged in sequence, and its structural form is similar to that of the second fin 63, so it will not be described in detail here.

[0076] In this embodiment, the two sides extending along the length direction of the first positioning piece 6201 are the first side 62011 and the second side 62012, respectively. The first side 62011 and the second side 62012 are both connected to the first positioning rib 6202. The first positioning rib 6202 connected to the first side 62011 and the first positioning rib 6202 connected to the second side 62012 are located on opposite sides of the bent section 522, or on opposite sides of the first heat exchange flat tube 51.

[0077] For example, the first positioning rib 6202 located at the first side 62011 of the first positioning piece 6201 corresponds one-to-one with the first positioning rib 6202 located at the second side 62012 of the first positioning piece 6201 and is parallel to each other.

[0078] The arrangement of the first positioning rib 6202, to a certain extent, determines the arrangement of the second fin 63. This arrangement of the first positioning rib 6202 facilitates the regular arrangement of the second fin 63.

[0079] In this embodiment, the first positioning rib 6202 located at the first side 62011 of the first positioning piece 6201 and the first positioning rib 6202 located at the second side 62012 of the first positioning piece 6201 are arranged in pairs.

[0080] Of course, in other embodiments, the first positioning rib 6202 located at the first side 62011 of the first positioning piece 6201 and the first positioning rib 6202 located at the second side 62012 of the first positioning piece 6201 are arranged alternately. Exemplarily, the outer contour of the first positioning piece 6201 is the same as the outer contour of the connected bent section 522 or connecting section 512.

[0081] Referring to Figures 6 and 7, for example, when the first positioning piece 6201 is connected to the bent section 522, the first positioning piece 6201 is also bent, and the bending direction of the first positioning piece 6201 is consistent with the bending direction of the bent section 522. Similarly, the first positioning rib 6202 can be located on one or both sides of the first positioning piece 6201.

[0082] Optionally, in this embodiment, the second fin 63 can also be an integral structural component with the first positioning rib 6202 and the first positioning piece 6201.

[0083] In other examples, the first positioning piece 6201 can be connected to the bent section 522 and the connecting section 512 by welding. The second fin 63 can also be connected to the first positioning rib 6202 by welding.

[0084] (2) The structure of the first positioning structure 621 and the second positioning structure 622 is the second type of structure.

[0085] Figure 8 is a schematic diagram of another positioning structure and the corresponding connection structure of the second fin. Referring to Figure 8, optionally, the positioning structure 62 includes a second positioning piece 6203. The second positioning piece 6203 has a first connecting surface 6211 and a second connecting surface 6212 arranged opposite to each other. The first connecting surface 6211 is connected to the second fin 63, and the second connecting surface 6212 is connected to the bent section 522 or the first heat exchange flat tube 51.

[0086] In this embodiment, one side of the second positioning piece 6203 is bent toward the side where the second connecting surface 6212 is located to form a first positioning groove 62031. The first positioning groove 62031 is sleeved on the side of the bent section 522 or the side of the first heat exchange flat tube 51.

[0087] In the above implementation, the first positioning groove 62031 is used to fit against the side of the bent section 522 or the connecting section 512, so as to facilitate the second positioning piece 6203 to be sleeved on the corresponding bent section 522 or connecting section 512. The second positioning piece 6203 is provided with a first connecting surface 6211 and a second connecting surface 6212, so that the first connecting surface 6211 can be connected to the corresponding second fin 63 of the second positioning piece 6203, and the second connecting surface 6212 can fit and connect to the corresponding connecting section 512, thereby realizing the installation of the positioning structure 62 and the second fin 63 at the bent section 522 and the connecting section 512.

[0088] Optionally, after the second positioning piece 6203 is fitted over the bent section 522 and the connecting section 512, the second positioning piece 6203 can be connected to the bent section 522 and the connecting section 512 by welding. The second fin 63 can also be connected to the second positioning piece 6203 by welding.

[0089] In other examples, the second fin 63 may also be an integral part of the second positioning piece 6203.

[0090] In this embodiment of the disclosure, in order to improve the fit between the second positioning piece 6203 and the bent segment 522 or the connecting segment 512, the shape of the first positioning groove 62031 is consistent with the shape corresponding to the contour of the sidewall of the bent segment 522 or the connecting segment 512. For example, when the sidewall of the bent segment 522 or the connecting segment 512 is arc-shaped, the corresponding first positioning groove 62031 is an arc-shaped groove.

[0091] Optionally, along the length of the first heat exchange flat tube 51, the second fin 63 includes a plurality of sequentially arranged V-shaped structures.

[0092] Figure 9 is a schematic diagram of the positioning structure in Figure 8. Referring to Figure 9, the positioning structure 62 also includes multiple second positioning ribs 6204, which are spaced apart along the length of the second positioning piece 6203 on the first connecting surface 6211. The length direction of the ridge of the second fin 63 is consistent with the length direction of the second positioning ribs 6204, and the ridge of the second fin 63 is connected to the second positioning ribs 6204.

[0093] In the above implementation, the second fin 63 is set as a series of sequentially arranged V-shaped structures, which can accelerate airflow through the hollow part of the V-shape, thereby improving heat exchange efficiency.

[0094] The second positioning rib 6204 can be used to position the installation and arrangement of the second fin 63, thereby reducing the installation difficulty of the second fin 63.

[0095] Figure 10 is a schematic diagram of another positioning structure, and Figure 11 is a schematic diagram of the connection structure between the positioning structure shown in Figure 10 and the second fin. The main difference between Figures 10 and 11 and Figures 8 and 9 is the different positions of the second fin 63 on the positioning structure 62. In another example, combining Figures 10 and 11, the positioning structure 62 further includes multiple third positioning ribs 6205. These ribs are located on one side of the first positioning groove 62031 and are spaced apart along the length of the second positioning piece 6203. Each third positioning rib 6205 is connected to the first positioning groove 62031. The length direction of the ridge of the second fin 63 is consistent with the length direction of the third positioning ribs 6205, and the ridge of the second fin 63 is connected to the third positioning ribs 6205.

[0096] In the above implementation, the third positioning rib 6205 is used to position the installation and arrangement of the second fin 63, thereby reducing the installation difficulty of the second fin 63. Furthermore, since the second fin 63 is no longer located on the first connecting surface 6211, there is no longer any obstruction from the second positioning piece 6203 between the second fin 63 and the connecting section 512 or the bending section 522, thus further improving the heat exchange efficiency.

[0097] Optionally, the third positioning rib 6205 is spaced apart from the second positioning piece 6203.

[0098] The third positioning rib 6205 is positioned at a distance from the second positioning piece 6203, so that the gap between the third positioning rib 6205 and the second positioning piece 6203 can be used to accommodate the connecting section 512 or the bent section 522.

[0099] Alternatively, the third positioning rib 6205 and the second fin 63 can also be connected by welding. In other examples, the second fin 63 and the third positioning rib 6205 can also be an integral structural component.

[0100] (3) When the structure of the first positioning structure 621 and the second positioning structure 622 is a third type of structure:

[0101] Figure 12 is a schematic diagram of another positioning structure and its connection to the corresponding second fin. Referring to Figure 12, the positioning structure 62 includes a third positioning piece 6206 and a fourth positioning piece 6207. The third positioning piece 6206 has a third connecting surface 6213 and a fourth connecting surface 6214 arranged opposite to each other. One side of the third positioning piece 6206 is bent towards the side where the fourth connecting surface 6214 is located to form a second positioning groove 62061. The second positioning groove 62061 is fitted onto the side of the bent section 522 or the side of the first heat exchange flat tube 51. The fourth positioning piece 6207 is located on the side of the fourth connecting surface 6214 facing away from the third connecting surface 6213, and the fourth positioning piece 6207 is connected to the second positioning groove 62061. The second fin 63 is connected to the side of the fourth positioning piece 6207 facing away from the third positioning piece 6206.

[0102] In the above implementation, the positioning structure 62 is designed in this way, and the second fin 63 can also be installed outside the bending section 522 or the connecting section 512 through the positioning structure 62 to further improve the heat exchange efficiency.

[0103] For example, the third positioning piece 6206 and the fourth positioning piece 6207 are parallel to each other, and both the third positioning piece 6206 and the fourth positioning piece 6207 are perpendicular to the axis of the first manifold 1.

[0104] In some examples, the fourth connecting surface 6214 is connected to the bent section 522, and the side of the fourth positioning piece 6207 facing the fourth connecting surface 6214 is connected to the first heat exchange flat tube 51.

[0105] In other examples, the fourth connecting surface 6214 is connected to the first heat exchange flat tube 51, and the side of the fourth positioning piece 6207 facing the fourth connecting surface 6214 is connected to the bent section 522.

[0106] This design can effectively improve the assembly reliability of the positioning structure 62 on the first heat exchange flat tube 51 or the second heat exchange flat tube 52.

[0107] Optionally, along the width direction of the first heat exchange flat tube 51, the fourth positioning plate 6207 has a first side and a second side arranged opposite to each other. The first side of the fourth positioning plate 6207 is connected to the third positioning plate 6206, and the second fin 63 corresponding to the positioning structure is located at the second side of the fourth positioning plate 6207. That is, the second fin 63 is located on the side of the fourth positioning plate 6207 away from the second positioning groove 62061.

[0108] For example, the positioning structure and the corresponding second fin 63 are an integral structural component.

[0109] In the above implementation, the positioning structure and the corresponding second fin 63 are set as an integral structure, which can further simplify the installation of the second fin 63. The second fin 63 can be installed simply by fitting the positioning structure over the bent section 522 or the connecting section 512 and then welding the positioning structure to the heat exchange flat tube, which greatly simplifies the process.

[0110] Because the positioning structure and the corresponding second fin 63 are integrated into a single structure, only a planar metal plate is needed to obtain both the positioning structure and the second fin 63. The planar metal plate is then bent to form two opposing planes. One plane is then bent again in a direction away from the other plane to obtain a vertical plane perpendicular to the original plane; this vertical plane is the second fin 63. In other words, the resulting positioning structure 62 can be protected by wrapping the bent section 522 or the connecting section 512 with the third positioning piece 6206. Furthermore, the length of the fourth positioning piece 6207 is set to be less than the width of the bent section 522 or the connecting section 512, allowing the second fin 63 to be conveniently positioned in the middle of the bent section 522 or the connecting section 512.

[0111] Optionally, the second fin 63 includes a plurality of second sub-fins 631. The plurality of second sub-fins 631 are arranged sequentially along the length direction of the fourth positioning piece 6207. In two adjacent second sub-fins 631, one second sub-fin 631 is inclined toward the second positioning groove 62061, and the other second sub-fin 631 is inclined away from the second positioning groove 62061.

[0112] In the above implementation, the second fin 63 is configured as multiple second sub-fins 631, and two adjacent second sub-fins 631 are tilted in different directions relative to the positioning structure they are connected to. This allows the second sub-fins 631 to be staggered, thereby enabling the second fin 63 to contact the airflow in different directions, thus further improving the heat exchange efficiency.

[0113] In other words, in the width direction of the heat exchange flat tube, if one of the two adjacent second sub-fins 631 tilts to the left, the other second sub-fin 631 can tilt to the right.

[0114] Optionally, along the length of the first manifold 1, the projection of the connection position of the second fin 63 with the corresponding positioning structure in the bending section 522 or connecting section 512 is located in the middle of the bending section 522 or connecting section 512. This allows the second fin 63 to be located in the middle of the bending section 522 or connecting section 512, thereby further improving the heat exchange efficiency.

[0115] In other examples, to further improve heat exchange efficiency, the side of the third positioning plate 6206 away from the second positioning groove 62061 can also be connected to the second fin 63. In this case, one positioning structure is connected to two second fins 63.

[0116] To further improve heat exchange efficiency, the second fin 63 can also be provided in more than one layer. In this case, the structure of the second fin 63 can be:

[0117] The second fin 63 includes a plurality of second sub-fins 631, which are divided into a plurality of sub-fin units along the width direction of the heat exchange flat tube. Each sub-fin unit includes a plurality of second sub-fins 631 arranged at intervals along the length direction of the heat exchange flat tube.

[0118] In the same sub-fin unit, two adjacent second sub-fins 631 are tilted in different directions relative to the positioning structure they are connected to, and all the second sub-fins 631 in the same sub-fin unit are tilted in the same direction.

[0119] In the above implementation, by setting the second fin 63 as a multi-layer second sub-fin 631, the heat exchange efficiency can be further improved.

[0120] The second sub-fin 631 can be a flat metal plate or a metal plate with an uneven surface, etc.

[0121] The working process of the heat exchanger provided in this embodiment is briefly described below:

[0122] Referring to Figures 13 and 14, after the heat exchangers of the dual heat exchange system are assembled, a first positioning structure 621 can be fitted at the bend section 522, and a second positioning structure 622 can be fitted over the connecting section 512. Then, one or two second fins 63 are connected to each of the first positioning structure 621 and the second positioning structure 622. In this way, the positioning structure 62 can be fitted over the bend section 522 of each second heat exchange flat tube 52 or over the connecting section 512 corresponding to the bend section 522, so that the second fins 63 can be installed through the positioning structure 62, thereby improving the heat exchange efficiency through the second fins 63.

[0123] It is important to note that when two second fins 63 are arranged on opposite sides of each first positioning structure 621 or second positioning structure 622, it is necessary to ensure that the second fins 63 on the connecting section 512 and the second fins 63 on the bending section 522 do not interfere with each other. For example, referring to Figure 14, the second fins 63 set in the connecting section 512 and the second fins 63 set in the bending section 522 are misaligned and do not overlap.

[0124] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A heat exchanger, comprising: First manifold (1), second manifold (2), third manifold (3), fourth manifold (4), heat exchange tube assembly (5), and fin assembly (6); The first manifold (1) and the second manifold (2) are located in a first plane, and the third manifold (3) and the fourth manifold (4) are located in a second plane, with the first plane and the second plane spaced apart. The heat exchange tube assembly (5) includes a first heat exchange flat tube (51) and a second heat exchange flat tube (52). The two ends of the first heat exchange flat tube (51) are respectively connected to the first manifold (1) and the second manifold (2). The second heat exchange flat tube (52) includes a straight section (521) and two bent sections (522). The straight section (521) is located on the first plane and is spaced apart from the first heat exchange flat tube (51). The two ends of the straight section (521) are respectively connected to one end of the two bent sections (522). The other ends of the two bent sections (522) are respectively connected to the third manifold (3) and the fourth manifold (4). The fin assembly (6) includes a plurality of first fins (61), a plurality of positioning structures (62), and a plurality of second fins (63). The first fins (61) are connected between an adjacent first heat exchange flat tube (51) and the straight section (521). The positioning structure (62) is sleeved on at least one of the bent section (522) and the end of the first heat exchange flat tube (51). The second fins (63) are connected to the positioning structure (62).

2. The heat exchanger according to claim 1, wherein, The positioning structure (62) includes a first positioning piece (6201) and a plurality of first positioning ribs (6202); The first positioning piece (6201) is connected to the side of the bent section (522) or the side of the first heat exchange flat tube (51); The plurality of first positioning ribs (6202) are arranged at intervals along the length direction of the first positioning piece (6201), and the plurality of first positioning ribs (6202) are respectively connected to the first positioning piece (6201); The second fin (63) is connected to the corresponding first positioning rib (6202).

3. The heat exchanger according to claim 2, wherein, The second fin (63) includes multiple V-shaped structures arranged in sequence; The length direction of the ridge of the second fin (63) is consistent with the length direction of the first positioning rib (6202), and the ridge of the second fin (63) is connected to the first positioning rib (6202).

4. The heat exchanger according to claim 2, wherein, The two sides extending along the length direction of the first positioning piece (6201) are the first side (62011) and the second side (62012), respectively. The first side (62011) and the second side (62012) are both connected to the first positioning rib (6202). The first positioning rib (6202) connected to the first side (62011) and the first positioning rib (6202) connected to the second side (62012) are respectively located on opposite sides of the bent section (522), or respectively located on opposite sides of the first heat exchange flat tube (51).

5. The heat exchanger according to claim 4, wherein, The first positioning rib (6202) located on one side of the first positioning piece (6201) extending along the length direction corresponds one-to-one with the first positioning rib (6202) located on the other side of the first positioning piece (6201) extending along the length direction and is parallel to each other.

6. The heat exchanger according to claim 1, wherein, The positioning structure (62) includes a second positioning piece (6203); The second positioning piece (6203) has a first connecting surface (6211) and a second connecting surface (6212) arranged opposite to each other. The first connecting surface (6211) is connected to the second fin (63), and the second connecting surface (6212) is connected to the bent section (522) or the first heat exchange flat tube (51).

7. The heat exchanger according to claim 6, wherein, One side of the second positioning piece (6203) is bent toward the side where the second connecting surface (6212) is located to form a first positioning groove (62031), and the first positioning groove (62031) is sleeved outside the side of the bent section (522) or the side of the first heat exchange flat tube (51).

8. The heat exchanger according to claim 6, wherein, The second fin (63) includes multiple V-shaped structures arranged in sequence; The positioning structure (62) further includes a plurality of second positioning ribs (6204), which are spaced apart on the first connecting surface (6211) along the length direction of the second positioning piece (6203); The length direction of the ridge of the second fin (63) is consistent with the length direction of the second positioning rib (6204), and the ridge of the second fin (63) is connected to the second positioning rib (6204).

9. The heat exchanger according to claim 7, wherein, The second fin (63) includes multiple V-shaped structures arranged in sequence; The positioning structure (62) further includes a plurality of third positioning ribs (6205), which are located on one side of the first positioning groove (62031) and are spaced apart along the length of the second positioning piece (6203). The plurality of third positioning ribs (6205) are respectively connected to the first positioning groove (62031). The length direction of the ridge of the second fin (63) is consistent with the length direction of the third positioning rib (6205), and the ridge of the second fin (63) is connected to the third positioning rib (6205).

10. The heat exchanger according to claim 1, wherein, The positioning structure (62) includes a third positioning piece (6206) and a fourth positioning piece (6207); The third positioning piece (6206) has a third connecting surface (6213) and a fourth connecting surface (6214) arranged opposite to each other. One side of the third positioning piece (6206) is bent toward the side where the fourth connecting surface (6214) is located to form a second positioning groove (62061). The second positioning groove (62061) is sleeved on the side of the bent section (522) or outside the side of the first heat exchange flat tube (51). The fourth positioning piece (6207) is located on the side of the fourth connecting surface (6214) facing away from the third connecting surface (6213), and the fourth positioning piece (6207) is connected to the second positioning groove (62061); The second fin (63) is connected to the side of the fourth positioning piece (6207) that faces away from the third positioning piece (6206).

11. The heat exchanger according to claim 10, wherein, The fourth connecting surface (6214) is connected to the bent section (522), and the side of the fourth positioning piece (6207) facing the fourth connecting surface (6214) is connected to the first heat exchange flat tube (51); or, The fourth connecting surface (6214) is connected to the first heat exchange flat tube (51), and the side of the fourth positioning piece (6207) facing the fourth connecting surface (6214) is connected to the bent section (522).

12. The heat exchanger according to claim 10, wherein, The second fin (63) is located on the side of the fourth positioning piece (6207) away from the second positioning groove (62061).

13. The heat exchanger according to claim 10, wherein, The positioning structure (62) and the corresponding second fin (63) are an integral structural component.

14. The heat exchanger according to claim 10, wherein, The second fin (63) includes a plurality of second sub-fins (631); The plurality of second sub-fins (631) are arranged sequentially along the length of the fourth positioning piece (6207). In two adjacent second sub-fins (631), one second sub-fin (631) is inclined toward the second positioning groove (62061), and the other second sub-fin (631) is inclined away from the second positioning groove (62061).

15. The heat exchanger according to any one of claims 1 to 14, wherein, The positioning structure (62) is an integral structural component.

16. The heat exchanger according to any one of claims 1 to 14, wherein, A portion of the plurality of positioning structures (62) is a first positioning structure (621), and another portion of the positioning structures (62) is a second positioning structure (622); The first positioning structure (621) is sleeved outside the bent section (522), and the second positioning structure (622) is sleeved outside the first heat exchange flat tube (51).

17. The heat exchanger according to claim 16, wherein, The first positioning structure (621) and the second positioning structure (622) have the same structure, or the first positioning structure (621) and the second positioning structure (622) have different structures.

18. The heat exchanger according to claim 16, wherein, Along the length direction of the first manifold (1), at least one side of the first positioning structure (621) has the second fin (63), and both sides of the second positioning structure (622) have the second fin (63).

19. The heat exchanger according to any one of claims 1 to 14, wherein, The first heat exchange flat tube (51) includes a main body section (511) and two connecting sections (512); The two ends of the main body section (511) are respectively connected to one end of the connecting section (512), and the other ends of the two connecting sections (512) are respectively connected to the first manifold (1) and the second manifold (2).

20. The heat exchanger according to claim 19, wherein, Along the length of the first manifold (1), the main body section (511) and the straight section (521) are arranged alternately.

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