Heat exchange fins, multi-fold heat exchangers and air conditioners

Abstract

The present invention discloses a heat exchange fin, a multi-fold heat exchanger and an air conditioner. The heat exchange fin includes a plurality of unit fins arranged in rows and a strip-shaped connecting piece disposed between two adjacent unit fins, and two ends of the strip-shaped connecting piece are respectively connected to the two adjacent unit fins. The heat exchange fin further includes an auxiliary connecting piece disposed between two adjacent unit fins, and there is a gap between the auxiliary connecting piece and the strip-shaped connecting piece at the corresponding position. The plurality of unit fins are sequentially connected into a whole through the strip-shaped connecting piece, the strip-shaped connecting piece can be bent, and the auxiliary connecting pieces between two adjacent unit fins can be separated from each other when the strip-shaped connecting piece is bent. The technical solution of the present invention can improve the assembly efficiency of the multi-fold heat exchanger.

Description

[0001] This application is a divisional application of the application with the application number 201611085140.9. The filing date of the parent case is November 29, 2016; the name of the invention-creation of the parent case is: heat exchange fin, multi-fold heat exchanger and air conditioner. Technical Field

[0002] The present invention relates to the technical field of air conditioners, and particularly relates to a heat exchange fin, a multi-fold heat exchanger and an air conditioner. Background Art

[0003] The multi-fold heat exchangers used in existing air conditioners are generally composed of a plurality of independent sub-heat exchangers connected together. After each sub-heat exchanger is separately formed, the end plates of the plurality of sub-heat exchangers are connected to a connecting plate by screws to form a multi-fold heat exchanger. For the multi-fold heat exchanger with such a structure, each sub-heat exchanger needs to be separately formed, and then the end plate is connected to the connecting plate, with more processes, resulting in low production and assembly efficiency of the multi-fold heat exchanger. Summary of the Invention

[0004] The main object of the present invention is to provide a heat exchange fin, aiming to improve the assembly efficiency of the multi-fold heat exchanger.

[0005] To achieve the above object, the heat exchange fin proposed by the present invention includes a plurality of unit fins arranged in rows and a strip-shaped connecting piece disposed between two adjacent unit fins. The two ends of the strip-shaped connecting piece are respectively connected to the two adjacent unit fins. The heat exchange fin further includes an auxiliary connecting piece disposed between two adjacent unit fins. There is a gap between the auxiliary connecting piece and the strip-shaped connecting piece at the corresponding position. The plurality of unit fins are sequentially connected into a whole through the strip-shaped connecting piece. The strip-shaped connecting piece can be bent, and the auxiliary connecting pieces between two adjacent unit fins can be separated from each other when the strip-shaped connecting piece is bent.

[0006] Preferably, the auxiliary connecting pieces between two adjacent unit fins can be in contact with each other before the strip-shaped connecting piece is bent.

[0007] Preferably, the widths of the plurality of unit fins are the same.

[0008] Preferably, a plurality of first mounting holes for mounting heat exchange tubes are formed in the unit fin. The plurality of first mounting holes are arranged in multiple rows in parallel. Each row includes a plurality of the first mounting holes evenly spaced along the length direction of the unit fin. In the same unit fin, the first mounting holes in adjacent rows are staggered. The adjacent two first mounting holes in any row are spaced by a first distance, and any one of the first mounting holes is spaced by a second distance from the two nearest other first mounting holes in the adjacent row.

[0009] Preferably, the apertures of the first mounting holes of at least two of the unit fins are the same; the first distances between two unit fins with the same aperture of the first mounting holes are equal, and the second distances between two unit fins with the same aperture of the first mounting holes are equal.

[0010] Preferably, the apertures of the first mounting holes of at least two adjacent unit fins are the same; the first mounting hole closest to the adjacent part in one unit fin is spaced from the first mounting hole closest to the adjacent part in another unit fin by a first distance or a second distance.

[0011] Preferably, a plurality of second mounting holes for mounting heat exchange tubes are further formed in at least one of the unit fins, the apertures of the first mounting holes and the second mounting holes are equal, and in the same unit fin, the second mounting hole is spaced from the nearest first mounting hole by the corresponding first distance or second distance of the unit fin; the second mounting hole is spaced from another nearest second mounting hole by the corresponding first distance or second distance of the unit fin.

[0012] Preferably, the apertures of the first mounting holes of at least two adjacent unit fins are the same; the second mounting hole closest to the adjacent part in one unit fin group is spaced from the first mounting hole closest to the adjacent part in another unit fin by a first distance or a second distance; or, the second mounting hole closest to the adjacent part in one unit fin group is spaced from the second mounting hole closest to the adjacent part in another unit fin by a first distance or a second distance.

[0013] Preferably, the apertures of the first mounting holes of at least two of the unit fins are different.

[0014] Preferably, among at least two of the unit fins,

[0015] the aperture of the first mounting hole of one unit fin is 3 - 6 mm, and the ratio range of the corresponding first distance to the corresponding second distance of the unit fin is 1.2 - 1.7;

[0016] the aperture of the first mounting hole of another unit fin is 6 - 8 mm, and the ratio range of the corresponding first distance to the corresponding second distance of the unit fin is 1 - 1.5.

[0017] The present invention further provides a multi-fold heat exchanger, which includes: side plates, multiple heat exchange fins arranged in a stacked manner, and multiple heat exchange tubes. The multiple heat exchange fins arranged in a stacked manner are disposed on one side of the side plates. The heat exchange fins include multiple unit fins arranged in rows and strip-shaped connecting pieces disposed between two adjacent unit fins. Two ends of each strip-shaped connecting piece are respectively connected to two adjacent unit fins. The unit fins at corresponding positions of multiple heat exchange fins form a unit fin group. The heat exchange tubes are installed on the side plates and are arranged through the corresponding unit fin groups.

[0018] The present invention further provides an air conditioner, which includes a multi-fold heat exchanger. The multi-fold heat exchanger includes: side plates, multiple heat exchange fins arranged in a stacked manner, and multiple heat exchange tubes. The multiple heat exchange fins arranged in a stacked manner are disposed on one side of the side plates. The heat exchange fins include multiple unit fins arranged in rows and strip-shaped connecting pieces disposed between two adjacent unit fins. Two ends of each strip-shaped connecting piece are respectively connected to two adjacent unit fins. The unit fins at corresponding positions of multiple heat exchange fins form a unit fin group. The heat exchange tubes are installed on the side plates and are arranged through the corresponding unit fin groups.

[0019] In the technical solution of the present invention, the heat exchange fins include multiple unit fins arranged in rows. When the heat exchange fins are applied to a multi-fold heat exchanger, by arranging multiple heat exchange fins in a stacked manner, the unit fins at corresponding positions of multiple heat exchange fins form a unit fin group. Each unit fin group, the heat exchange tubes arranged through it, and the corresponding plate body jointly form an independent heat exchange part. In this way, the multi-fold heat exchanger can be divided into multiple heat exchange parts, and two adjacent heat exchange parts are arranged in a V shape or a straight shape, realizing the bending setting of the multi-fold heat exchanger. Among them, multiple unit fins are sequentially connected into a whole through strip-shaped connecting pieces. Therefore, all the unit fins of the entire heat exchange fins can be cut into shape at one time. Compared with the existing multi-fold heat exchanger where each heat exchange part fin is formed separately, the production efficiency of the heat exchange fins can be improved. At the same time, the unit fins are connected through strip-shaped connecting pieces. When assembling the multi-fold heat exchanger, the strip-shaped connecting pieces can be bent as needed, so as to realize the bending setting of the multi-fold heat exchanger without changing the shape of the unit fins. Since the strip-shaped connecting pieces have already connected two adjacent unit fins, the alignment operation during the installation of the heat exchange part can be simplified, thereby further improving the assembly efficiency of the corresponding multi-fold heat exchanger. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an embodiment of the heat exchange fins of the present invention;

[0021] Figure 2 is a schematic structural diagram of another embodiment of the heat exchange fins of the present invention;

[0022] Figure 3 is Figure 2 a schematic structural view of the heat exchange fin in the bent state shown;

[0023] Figure 4 is a schematic structural view of the bent state of another embodiment of the heat exchange fin of the present invention;

[0024] Figure 5 is a schematic structural view of an embodiment of a multi-fold heat exchanger of the present invention.

[0025] Explanation of the reference numerals in the drawings:

[0026] Label Name Label Name 100 Heat exchange fin 200 Side plate 300 Heat exchange tube 110 or 110’ Unit fin 120 Strip connecting piece 130 Auxiliary connecting piece 111 or 111’ First mounting hole 112 or 112’ Second mounting hole

[0027] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0031] The present invention provides a heat exchange fin.

[0032] Please refer to Figure 1 or Figure 2, in an embodiment of the present invention, the heat exchange fin 100 includes a plurality of unit fins 110 arranged in rows and strip-shaped connecting pieces 120 disposed between two adjacent unit fins 110, and two ends of the strip-shaped connecting piece 120 are respectively connected to two adjacent unit fins 110.

[0033] In the technical solution of the present invention, the heat exchange fin 100 includes a plurality of unit fins 110 arranged in rows. When the heat exchange fin 100 is applied to a multi-fold heat exchanger, by stacking and arranging a plurality of heat exchange fins 100, the unit fins 110 at corresponding positions of the plurality of heat exchange fins 100 form a unit fin 110 group. Each unit fin 110 group and the heat exchange tube 300 and the corresponding plate body passing through it together form an independent heat exchange part. In this way, the multi-fold heat exchanger can be divided into a plurality of heat exchange parts, and two adjacent heat exchange parts are arranged in a V shape or a straight shape, realizing the bending setting of the multi-fold heat exchanger; among them, a plurality of unit fins 110 are sequentially connected into a whole through the strip-shaped connecting piece 120. Therefore, all the unit fins 110 of the entire heat exchange fin 100 can be cut and formed at one time. Compared with the existing multi-fold heat exchanger that separately forms the fins of each heat exchange part, the production efficiency of the heat exchange fin 100 can be improved. At the same time, the unit fins 110 are connected through the strip-shaped connecting piece 120. When assembling the multi-fold heat exchanger, the strip-shaped connecting piece 120 can be bent as needed, so as to realize the bending setting of the multi-fold heat exchanger without changing the shape of the unit fins 110. Since the strip-shaped connecting piece 120 has already connected two adjacent unit fins 110, the alignment operation during the installation of the heat exchange part can be simplified, thereby further improving the assembly efficiency of the corresponding multi-fold heat exchanger.

[0034] Please refer to Figure 1 or Figure 2 , when the heat exchange fin 100 is formed, an auxiliary connecting piece 130 having a certain gap (1 - 5 mm) with the strip-shaped connecting piece 120 can be added on one side of the strip-shaped connecting piece 120. The auxiliary connecting piece 130 is disposed between two adjacent unit fins 110, and two ends of the auxiliary connecting piece 130 are respectively connected to two adjacent unit fins 110. There is a gap between the auxiliary connecting piece 130 and the strip-shaped connecting piece 120 at the corresponding position. The auxiliary connecting piece 130 can increase the connection strength between the unit fins 110, increase the overall reliability of the heat exchange fin 100, and facilitate the transportation of the heat exchange fin 100. When assembling the multi-fold heat exchanger, cut it off before the bending operation (along Figure 1The auxiliary connecting piece 130 (the middle dotted line) can avoid the influence of the auxiliary connecting piece 130 on the assembly. Among them, the gap between the auxiliary connecting piece 130 and the strip-shaped connecting piece 120 can prevent the strip-shaped connecting piece 120 from being cut off when the auxiliary connecting piece 130 is cut. In order to facilitate the cutting and forming of the heat exchange fin 100, the widths of the plurality of unit fins 110 are set to be the same. In this way, the long side of the heat exchange fin 100 can be cut in one operation during the cutting operation, and the cutting operation is simple, which is beneficial to improving the production efficiency of the heat exchange fin 100.

[0035] Please refer to Figure 1 , the heat exchange tubes 300 of the multi-fold heat exchanger are arranged through the heat exchange fins 100. Among them, a plurality of first installation holes 111 for the heat exchange tubes 300 to pass through for installation are provided on the unit fins 110. The plurality of first installation holes 111 are arranged in multiple rows in parallel. Each row includes a plurality of the first installation holes 111 uniformly spaced along the length direction of the unit fin 110. In the same unit fin 110, the first installation holes 111 in adjacent rows are staggered. The adjacent two first installation holes 111 in any row are spaced apart by a first distance P, and any one of the first installation holes 111 is spaced apart from the other two nearest first installation holes 111 in the adjacent row by a second distance N. In this way, the long U-shaped tubes connecting the heat exchange tubes 300 can have a unified specification (corresponding to the first distance P), and the semi-circular tubes can have a unified specification (corresponding to the second distance N). In this way, the specifications of the connecting tubes can be unified, the alignment operation can be simplified, and it is beneficial to improve the assembly efficiency of the heat exchange tubes 300. In order to further improve the versatility of the long U-shaped tubes and the semi-circular tubes, at least two of the unit fins 110 can be provided with the first installation holes 111 having the same aperture; the first distance P of the two unit fins 110 with the same aperture of the first installation holes 111 is equal, and the second distance N of the two unit fins 110 with the same aperture of the first installation holes 111 is equal. It can be further set that at least two adjacent unit fins 110 have the first installation holes 111 with the same aperture; the first installation hole 111 closest to the adjacent part in one unit fin 110 is spaced apart from the first installation hole 111 closest to the adjacent part in another unit fin 110 by the first distance P or the second distance N; at this time, when the heat exchange tubes 300 in the two first installation holes 111 closest to the adjacent part in the adjacent two heat exchange parts are connected, the same specification of long U-shaped tube or semi-circular tube used for connecting other heat exchange tubes 300 can be used for connection. In this way, it can be ensured that the heat exchange tubes 300 of the corresponding two heat exchange parts can all be connected using the same specification of long U-shaped tube and the same specification of semi-circular tube, further simplifying the alignment operation and improving the assembly efficiency.

[0036] Please refer to Figure 2 or Figure 4, in order to improve the utilization rate of the unit fin 110, a second mounting hole 112 can be opened at a position where the first mounting hole 111 is not provided at the corner of the unit fin 110. The second mounting hole 112 can also mount the heat exchange tube 300, thereby increasing the number of heat exchange tubes 300 corresponding to the unit fin 110 and improving the heat exchange efficiency of the corresponding heat exchange part; please refer to Figure 2 and Figure 3 or Figure 4 ; in this embodiment, a plurality of second mounting holes 112 (or 112') for mounting the heat exchange tube 300 are further opened on at least one of the unit fins 110 (or 110'). The apertures of the first mounting holes 111 (or 111') and the second mounting holes 112 (or 112') are equal. In the same unit fin 110 (or 110'), the second mounting hole 112 (or 112') and the nearest first mounting hole 111 (or 111') are spaced by the first distance P (or P') or the second distance N (or N') corresponding to the unit fin 110 (or 110'); the second mounting hole 112 (or 112') and the nearest other second mounting hole 112 (or 112') are spaced by the first distance P (or P') or the second distance N (or N') corresponding to the unit fin 110 (or 110'). By setting the second mounting hole 112 to be spaced from the nearest first mounting hole 111 by the first distance P or the second distance N; the second mounting hole 112 and the nearest other second mounting hole 112 are spaced by the first distance P or the second distance N, when the heat exchange tube 300 corresponding to the second mounting hole 112 is connected to other heat exchange tubes 300, long U-tubes or semi-circular tubes of the same specification can be used, simplifying the alignment operation and improving the assembly efficiency. At this time, please refer to Figure 3 , when the apertures of the first mounting holes 111 of at least two adjacent unit fins 110 are the same, the second mounting hole 112 closest to the adjacent position in one unit fin 110 group and the first mounting hole 111 closest to the adjacent position in another unit fin 110 are spaced by the first distance P or the second distance N; or, the second mounting hole 112 closest to the adjacent position in one unit fin 110 group and the second mounting hole 112 closest to the adjacent position in another unit fin 110 are spaced by the first distance P or the second distance N. In this way, when the heat exchange tubes 300 corresponding to two adjacent unit fins 110 are connected, whether the first mounting hole 111 or the second mounting hole 112 is closest to the connection position, the corresponding heat exchange tube 300 can be connected using the same specification of long U-tube or semi-circular tube used for connecting other heat exchange tubes 300.

[0037] Please refer to Figure 1 or Figure 2 or Figure 4, in the embodiment of the present invention, the apertures of the first mounting holes 111 of at least two of the unit fins 110 are different; thus, different pipe diameters are respectively provided in the heat exchange part at the front end of the air conditioner and the heat exchange part at the rear end of the air conditioner in the multi-fold heat exchanger, so that the flow path can be adjusted according to the heat exchange characteristics of the refrigerant in different pipe diameters to improve the heat exchange efficiency of the entire heat exchanger; generally, heat exchange pipes 300 with a smaller pipe diameter are provided in the heat exchange part at the front end, and heat exchange pipes 300 with a larger pipe diameter are used in the heat exchanger at the rear end. According to the heat exchange characteristics of the refrigerant in different flow states in different pipe diameters, in the two-phase region, the small pipe diameter and more flow paths are fully utilized to improve the heat exchange performance of the refrigerant in the two-phase region; in the gas phase region, the larger pipe diameter and fewer flow paths are fully utilized to increase the flow velocity of the refrigerant in the pipe to improve the heat exchange performance in the single-phase region, thereby greatly improving the heat exchange efficiency of the multi-fold heat exchanger. Specifically, please refer to Figure 1 or Figure 4 , among at least two of the unit fins 110, the aperture of the first mounting hole 111 of one unit fin 110 is 3-6 mm. Considering heat exchange efficiency, process, standardization, manufacturing efficiency, etc. comprehensively, the ratio range of the first distance P corresponding to the unit fin 110 to the second distance N corresponding to the unit fin 110 is specifically set to be 1.2-1.7; the aperture of the first mounting hole 111' of another unit fin 110' is 6-8 mm. Considering heat exchange efficiency, process, standardization, manufacturing efficiency, etc. comprehensively, the ratio range of the first distance P' corresponding to the unit fin 110' to the second distance N' corresponding to the unit fin 110' is specifically set to be 1-1.5. By adopting different arrangements at key different positions, breakthroughs in heat exchange efficiency and manufacturing process are achieved simultaneously, and the assembly efficiency and heat exchange efficiency are improved.

[0038] Please refer to Figure 5 , the present invention also proposes a multi-fold heat exchanger, which includes side plates 200, multiple heat exchange fins 100 arranged in a stacked manner, and multiple heat exchange pipes 300. The specific structure of the heat exchange fins 100 refers to the above embodiment. Since this multi-fold heat exchanger adopts all the technical solutions of the above all embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, multiple heat exchange fins 100 arranged in a stacked manner are provided on one side of the side plates 200, and the unit fins 110 at corresponding positions of the multiple heat exchange fins 100 form a unit fin 110 group; the heat exchange pipes 300 are installed on the side plates 200 and are arranged through the corresponding unit fin 110 groups. Specifically, the heat exchange pipes 300 respectively pass through the first mounting holes 111 or the second mounting holes 112 on the unit fins 110 to realize the assembly of the heat exchange pipes 300 and the unit fin 110 groups.

[0039] The present invention also provides an air conditioner, which includes a multi-fold heat exchanger. The specific structure of the multi-fold heat exchanger refers to the above embodiments. Since this air conditioner adopts all the technical solutions of the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0040] It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those skilled in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A heat exchange fin, characterized in that, It includes a plurality of unit fins arranged in rows and strip-shaped connecting pieces provided between two adjacent unit fins. The two ends of each strip-shaped connecting piece are respectively connected to the two adjacent unit fins. The heat exchange fin further includes auxiliary connecting pieces provided between two adjacent unit fins. There is a gap between the auxiliary connecting piece and the strip-shaped connecting piece at the corresponding position. The plurality of unit fins are sequentially connected into a whole through the strip-shaped connecting pieces. The strip-shaped connecting piece can be bent, and the auxiliary connecting pieces between two adjacent unit fins can be separated from each other when the strip-shaped connecting piece is bent.

2. The heat exchange fin according to claim 1, characterized in that, The auxiliary connecting pieces between two adjacent unit fins can be in contact with each other before the strip-shaped connecting piece is bent.

3. The heat exchange fin according to claim 1, wherein, The widths of the plurality of unit fins are the same.

4. The heat exchange fin according to claim 1, wherein A plurality of first mounting holes for mounting heat exchange tubes are formed in the unit fin. The plurality of first mounting holes are arranged in multiple rows parallel to each other. Each row includes a plurality of the first mounting holes uniformly spaced along the length direction of the unit fin. In the same unit fin, the first mounting holes in adjacent rows are staggered. The adjacent two first mounting holes in any row are spaced by a first distance. Any one of the first mounting holes is spaced by a second distance from the two nearest other first mounting holes in the adjacent row.

5. The heat exchange fin according to claim 4, wherein The apertures of the first mounting holes of at least two unit fins are the same. For two unit fins with the same aperture of the first mounting holes, the first distance is equal, and the second distance is equal.

6. The heat exchange fin according to claim 5, characterized in that, The apertures of the first mounting holes of at least two adjacent unit fins are the same. The first mounting hole closest to the adjacent part in one unit fin is spaced by a first distance or a second distance from the first mounting hole closest to the adjacent part in another unit fin.

7. The heat exchange fin according to claim 4, wherein At least one unit fin is further provided with a plurality of second mounting holes for mounting heat exchange tubes. The apertures of the first mounting holes and the second mounting holes are equal. In the same unit fin, the second mounting hole is spaced by the corresponding first distance or second distance of the unit fin from the nearest first mounting hole. The second mounting hole is spaced by the corresponding first distance or second distance of the unit fin from the nearest other second mounting hole.

8. The heat exchange fin according to claim 7, wherein, The apertures of the first mounting holes of at least two adjacent unit fins are the same. The second mounting hole closest to the adjacent part in one unit fin group is spaced by a first distance or a second distance from the first mounting hole closest to the adjacent part in another unit fin. Or, The second mounting hole closest to the adjacent part in one unit fin group is spaced by a first distance or a second distance from the second mounting hole closest to the adjacent part in another unit fin.

9. The heat exchange fin according to claim 4, wherein The apertures of the first mounting holes of at least two unit fins are different.

10. The heat exchange fin according to claim 9, wherein, Among at least two unit fins, The aperture of the first mounting hole of one of the unit fins is 3 - 6 mm, and the ratio range of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1.2 - 1.7; The aperture of the first mounting hole of the other unit fin is 6 - 8 mm, and the ratio range of the first distance corresponding to the unit fin to the second distance corresponding to the unit fin is 1 - 1.

5.

11. A multi-fold heat exchanger, characterized in that, Comprising: Side plates; Multiple heat exchange fins arranged in a stacked manner, disposed on one side of the side plates. The heat exchange fins are the heat exchange fins according to any one of claims 1 to 10. The unit fins at corresponding positions of multiple heat exchange fins form a unit fin group; Multiple heat exchange tubes, the heat exchange tubes are installed on the side plates and are arranged through the corresponding unit fin groups.

12. An air conditioner, characterized in that, Comprising the multi-fold heat exchanger as claimed in claim 11.

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