CN213714069U - Fin and lamellar body, heat exchanger and indirect heating equipment and air conditioner thereof - Google Patents

Abstract

The utility model discloses a fin and lamellar body thereof, heat exchanger and indirect heating equipment and air conditioner, wherein, a heat-transfer surface for forming the lamellar body of fin has binding face and carries on the back mutually with the binding face, the lamellar body includes the current collection district, the current collection district has the hole that gathers current in binding face department, the current collection district has the pressure manifold of evagination in heat-transfer surface department, the pressure manifold includes the multilayer body, and adjacent two-layer body is close contact in the direction from inside to outside, wherein, the body that is located the inlayer is the inner tube, inner tube and hole intercommunication that gathers current, it is the outer tube to be located outermost body. The sheet body for forming the fin can improve the pressure resistance of the fin.

Description

Fin and lamellar body, heat exchanger and indirect heating equipment and air conditioner thereof

Technical Field

The utility model relates to a heat exchange technology field, in particular to fin and lamellar body, heat exchanger and indirect heating equipment and air conditioner thereof.

Background

In the related art, the pressure resistance of the flow collecting channel of the fin is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lamellar body for forming fin aims at improving the pressure resistance of fin.

In order to achieve the above object, the utility model provides a lamellar body for forming fin, the lamellar body have the binding face and with the heat transfer surface that the binding face carried on the back mutually, the lamellar body includes:

the flow collecting area is provided with a flow collecting hole at the joint face, the flow collecting area is provided with an outward convex flow collecting pipe at the heat exchange face, the flow collecting pipe comprises a plurality of layers of pipe bodies, two adjacent layers of the pipe bodies are tightly contacted in the direction from inside to outside, the pipe body positioned on the innermost layer is an inner pipe, the inner pipe is communicated with the flow collecting hole, and the pipe body positioned on the outermost layer is an outer pipe.

In an embodiment, a joint between the inner wall of the outer tube and the attachment surface has a first arc surface protruding toward the inner tube, the outer wall of the tube body adjacent to the outer tube has a second arc surface corresponding to the first arc surface, and the second arc surface is wrapped on the first arc surface and is in close contact with the first arc surface.

In one embodiment, the pipe body adjacent to the outer pipe has a joint end surface, the joint end surface connects the outer wall and the inner wall of the pipe body adjacent to the outer pipe, and the joint end surface and the abutting surface are located on the same plane.

In one embodiment, the plurality of layers of tubes are connected end to end.

In an embodiment, the collecting pipe further includes an outward convex arc portion, and two adjacent layers of pipe bodies are connected through the arc portion.

In an embodiment, a joint between the outer wall of the outer tube and the heat exchange surface is provided with a third arc surface, and when the plurality of fins are arranged in the thickness direction, the third arc surface of the header pipe of one fin can be coated on the arc portion of the header pipe of another fin and is in close contact with the arc portion.

In an embodiment, the pipe body located between the inner pipe and the outer pipe is a middle pipe, the number of the middle pipes is at least 1, the outer wall of the free end of the inner pipe includes a second arc surface, and the second arc surface is wrapped on the adjacent arc portion and is in close contact with the arc portion.

In one embodiment, the process of forming the header includes a drawing process and a back extrusion process.

In one embodiment, the sheet body further comprises a heat exchange area, and the heat exchange area is provided with a concave heat exchange groove at the joint surface; the collecting holes are communicated with the heat exchange grooves.

In an embodiment, the number of the flow collecting regions is two, and the two flow collecting regions are respectively located at two ends of the heat exchange region in the length direction.

The utility model also provides a fin, including two foretell lamellar bodies, two the lamellar body the binding face laminating, two the lamellar body the heat transfer groove encloses to close and forms the heat transfer passageway of fin, two the lamellar body the pressure manifold intercommunication forms the mass flow passageway of fin.

In an embodiment, in the collecting channel, an inner diameter of the inner tube of one collecting pipe is matched with an outer diameter of the outer tube of another collecting pipe, so that when a plurality of fins are arranged in the thickness direction, one collecting pipe of one fin can be inserted into the collecting pipe of another fin and can be in contact fit or interference fit with the collecting pipe.

The utility model also provides a fin, include:

the first sheet body is the sheet body; and

the second sheet body is provided with a bonding corresponding surface and a heat exchange corresponding surface opposite to the bonding corresponding surface, the second sheet body comprises a current collection corresponding area, the current collection corresponding area is provided with a current collection corresponding hole at the bonding corresponding surface, the current collection corresponding area is provided with a current collection corresponding pipe protruding outwards at the heat exchange corresponding surface, and the current collection corresponding pipe is communicated with the current collection corresponding hole;

the corresponding attaching surface is attached to the attaching surface, and the collecting corresponding pipe is communicated with the collecting pipe through the collecting corresponding hole and the collecting hole to form a collecting channel of the fin.

In an embodiment, in the collecting channel, an inner diameter of the collecting corresponding tube matches an outer diameter of the outer tube of the collecting main or an outer diameter of the collecting corresponding tube matches an inner diameter of the inner tube of the collecting main, so that when a plurality of fins are arranged in the thickness direction, the collecting corresponding tube of one fin can be inserted into the collecting main of another fin and is in contact fit or interference fit with the collecting main.

In one embodiment, the corresponding collecting pipe comprises at least one layer of pipe body.

In one embodiment, the second sheet body further comprises a heat exchange corresponding region, the heat exchange corresponding region is provided with a heat exchange corresponding groove which is concave at the position of the fit corresponding surface, and the flow collecting corresponding hole is communicated with the heat exchange corresponding groove;

when the first sheet body is provided with the heat exchange grooves, the heat exchange corresponding grooves and the heat exchange grooves are encircled to form heat exchange channels of the fins;

when the first sheet body does not have the heat exchange groove, the heat exchange corresponding groove and the binding surface enclose to form a heat exchange channel of the fin.

The utility model also provides a heat exchanger, including the foretell fin of multi-disc, the multi-disc the fin is arranged on thickness direction, and adjacent two be formed with airflow channel between the fin.

The utility model also provides a indirect heating equipment, including foretell heat exchanger.

The utility model also provides an air conditioner, a serial communication port, including foretell heat exchanger.

In the sheet body for forming the fin, since the header includes the plurality of layers of tube bodies, the header has a thicker wall thickness than a header including only one layer of tube body, so that the header has better pressure resistance, and further, both the header passage including the fin of the header and the supply and discharge passage including the heat exchanger of the torrent tube have better pressure resistance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a sheet body according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of another surface of the tablet shown in FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a partial enlarged view at B in fig. 4;

fig. 6 is a schematic perspective view of a fin according to an embodiment of the present invention;

fig. 7 is a partial enlarged view at C in fig. 6;

FIG. 8 is an exploded view of the fin shown in FIG. 6;

FIG. 9 is a top view of FIG. 6;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;

FIG. 11 is a cross-sectional view taken along line E-E of FIG. 9;

fig. 12 is a partial enlarged view at F in fig. 11;

fig. 13 is a schematic perspective view of a heat exchanger according to an embodiment of the present invention;

fig. 14 is a partial enlarged view at G in fig. 13;

FIG. 15 is a top view of FIG. 13;

FIG. 16 is a sectional view taken along line H-H in FIG. 15;

fig. 17 is a partial enlarged view at I in fig. 16;

fig. 18 is a schematic perspective view of a sheet body according to another embodiment of the present invention;

FIG. 19 is a top view of the back of the tablet shown in FIG. 18;

FIG. 20 is a cross-sectional view taken along line J-J of FIG. 19;

FIG. 21 is a schematic cross-sectional view of a sheet body according to another embodiment of the present invention;

fig. 22 is a schematic view of a manufacturing process of the sheet body according to an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a lamellar body for forming fin.

In the embodiment of the present invention, as shown in fig. 1-5, the sheet body 100 has an attaching surface 102 and a heat exchanging surface 104 opposite to the attaching surface 102.

The sheet 100 includes a heat transfer region 100a and a heat collecting region 100 b.

The heat exchange area 100a has a concave heat exchange groove 110 at the joint surface 102. In this embodiment, the heat exchange area 100a has convex protrusions 120 at the heat exchange surface 104. As such, the heat exchange groove 110 and the protrusion 120 may be formed simultaneously using a drawing process (to be further described later) or a stamping process. It is understood that in other embodiments, the protrusion 120 may be omitted.

The manifold area 100b has a manifold aperture 130 at the faying surface 102. The manifold holes 130 communicate with the heat exchange grooves 110. The collecting area 100b has a convex collecting pipe 140 at the heat exchange surface 104. The manifold 140 includes a plurality of layers of tubes. The adjacent two layers of pipe bodies are tightly contacted in the direction from inside to outside, so that the multi-layer pipe bodies can form the collecting pipe 140 with larger wall thickness, and further the collecting pipe 140 with larger compressive strength is obtained. The innermost pipe body is an inner pipe 140a, the outermost pipe body is an outer pipe 140b, and the inner pipe 140a is communicated with the manifold 130.

As shown in fig. 6-12, the sheet body 100 can be applied to the fin 12. When the above-described sheet body 100 is applied to the fin 12, the fin 12 includes two sheet bodies 100 stacked in the thickness direction. The joint surfaces 102 of the two sheet bodies 100 are jointed, the heat exchange grooves 110 of the two sheet bodies 100 surround to form the heat exchange passages 12a of the fins 12, and the collecting pipes 140 of the two sheet bodies 100 are communicated through the respective collecting holes 130 to form the collecting passages 12b of the fins 12.

As shown in fig. 13 to 17, the above-described fin 12 can be applied to the heat exchanger 10. When the fin 12 is applied to the heat exchanger 10, the heat exchanger 10 includes a plurality of fins 12, the plurality of fins 12 are arranged in the thickness direction, and an airflow channel 10a is formed between two adjacent fins 12, and when an airflow passes through the airflow channel 10a, the airflow exchanges heat with the fins 12, so that heat exchange is realized. And the collecting channels 12b of the plurality of fins 12 are communicated to form the supply and discharge channels 10b of the heat exchanger 10. The supply and discharge channels 10b can supply the heat exchange channels 12a with a heat exchange medium.

When the collecting channels 12b of two adjacent fins 12 are connected in a butt joint manner, the wall thickness of the feeding and discharging channel 10b of the heat exchanger 10 is equal to that of the collecting main 240. Since the header 140 includes a plurality of layers of tubes, the header 140 has a thicker wall thickness than a header including only one layer of tubes, so that the header 240 has a better pressure resistance, and thus the supply/discharge passage 10b of the heat exchanger 10 has a better pressure resistance.

When the collecting channels 12b of two adjacent fins 12 are connected in a plugging manner, the wall thickness of the supply and discharge channel 10b of the heat exchanger 10 is the sum of the wall thicknesses of the two layers of collecting pipes 240. And thus the supply and discharge passage 10b of the heat exchanger 10 has a better pressure resistance.

In the present embodiment, the collecting channels 12b of two adjacent fins 12 are connected in a plugging manner. In the present embodiment, as shown in fig. 11 and 12, in the header passage 12b, the inner diameter of the inner tube 140a of one header 140 is matched with the outer diameter of the outer tube 140b of the other header 140. As shown in fig. 16 and 17, when a plurality of fins 12 are arranged in the thickness direction to form the heat exchanger 10, one header 140 of one fin 12 can be inserted into the header 140 of another fin 12, and contact-fit or interference-fit with the header 140 to form the row supply passage 10b of the heat exchanger 10. In this way, the thickness of the supply and discharge passage 10b of the heat exchanger 10 is equal to the sum of the thicknesses of the two layers of the header pipes 240, and the plurality of fins 12 may have the same structure, which is more advantageous for manufacturing the heat exchanger 10. It is understood that in other embodiments, the structures of the fins 12 of the heat exchanger 10 may also be different, and at this time, the insertion of the fins 12 may also be realized by controlling the inner diameter of the header 140 of the fins 12 to gradually increase, and the wall thickness of the supply and discharge passage 10b of the heat exchanger 10 is the sum of the wall thicknesses of the two layers of header 240.

In some embodiments, in fin 12, headers 140 of both sheets 100 comprise multiple layers of tubes, and headers 140 of both sheets 100 have the same number of layers. As shown in fig. 11 and 12, in the embodiment shown in fig. 11 and 12, the headers 140 of the two sheets 100 each include two layers of tubes.

In some embodiments, in fin 12, headers 140 of two sheets 100 each include multiple layers of tubes, and the number of layers of tubes of headers 140 of two sheets 100 is different. For example, in one embodiment, the headers 140 of one sheet 100 include two layers of tubes, and the headers 140 of another sheet 100 include three tubes.

In some embodiments, in the fin 12, the header 140 of one sheet 100 (the first sheet) includes a plurality of layers of tubes, and the header 140 of another sheet 100 (the second sheet) includes one layer of tubes.

As shown in fig. 18 to 20, the fin 12 includes a first fin body and a second fin body 200 stacked in the thickness direction, wherein the first fin body is the above-mentioned fin body 100, and the second fin body 200 will not be described in detail.

The second sheet 200 has a corresponding attachment surface 202 and a corresponding heat exchange surface 204 opposite to the corresponding attachment surface 202. Second sheet 200 includes heat exchange counterpart 200a and current collection counterpart 200 b. The heat exchange corresponding region 200a has an inward concave heat exchange corresponding groove 210 at the position corresponding to the corresponding surface 202, and the heat exchange corresponding region 200a has an outward convex corresponding protrusion 220 at the position corresponding to the heat exchange surface 204. The corresponding collecting area 200b is provided with corresponding collecting holes 230 at the position where the corresponding collecting face 202 is attached, and the corresponding collecting holes 230 are communicated with the corresponding heat exchange slots 210. The corresponding collecting area 200b is provided with a convex corresponding collecting pipe 240 at the corresponding heat exchanging surface 204, and the corresponding collecting pipe 240 is communicated with the corresponding collecting hole 230.

In the fin 12, the contact surface 102 of the first sheet 100 is contacted with the contact corresponding surface 202 of the second sheet 200, the heat exchange grooves 110 of the first sheet 100 and the heat exchange corresponding grooves 210 of the second sheet 200 surround to form the heat exchange passages 12a of the fin 12, and the inner tubes 140a of the header 140 of the first sheet 100 and the header corresponding tubes 240 of the second sheet 200 are communicated with each other through the header holes 130 and the header corresponding holes 230 to form the header passages 12b of the fin 12. In the header passage 12b, the inner diameter of the header corresponding tube 240 matches the outer diameter of the outer tube 140b of the header 140 or the outer diameter of the header corresponding tube 240 matches the inner diameter of the inner tube 140a of the header 140, so that when the plurality of fins 12 are arranged in the thickness direction to form the heat exchanger 10, the header corresponding tube 240 of the second sheet 200 can be inserted into the header 140 of the first sheet 100 and in contact fit or interference fit with the header 140 to form the supply and discharge passage 10b of the heat exchanger 10.

In the above three embodiments, since the fin 12 includes at least one sheet body 100, the fin 12 in the above three embodiments can provide the supply and discharge passage 10b of the heat exchanger 10 with a better pressure resistance after being applied to the heat exchanger 10. The pressure resistance of the supply and discharge passage 10b of the heat exchanger 10 is positively correlated with the number of layers of the tube bodies under the same other conditions, that is, the greater the number of layers of the tube bodies forming the supply and discharge passage 10b is, the better the pressure resistance of the supply and discharge passage 10b is under the same other conditions.

In this embodiment, there are two collecting regions 100b, and the two collecting regions 100b are respectively located at two ends of the heat exchange region 100a in the length direction. The header 140 on one collecting region 100b is an inlet header, and the header 140 on the other collecting region 100b is an outlet header. Correspondingly, the collecting channel 12b comprises an inlet collecting channel comprising an inlet collecting main and an outlet collecting channel comprising an outlet collecting main. Accordingly, the supply and discharge channels 10b include supply channels including inlet collecting channels and discharge channels including outlet collecting channels.

In the transmission process of the heat exchange medium, after entering the supply passage, the heat exchange medium is transmitted to the inlet header pipe through the supply passage, is transmitted into the heat exchange passage 12a through the inlet header pipe, and is transmitted to the discharge passage through the outlet header pipe.

In this embodiment, both sheet bodies 100 have heat exchange grooves 110, and the heat exchange grooves 110 of the two sheet bodies 100 enclose the heat exchange channels 12a of the fins 12. It is understood that in other embodiments, one sheet body 100 may have heat exchanging grooves 110, and another sheet body 100 does not have heat exchanging grooves 110, such two sheet bodies 100 can also enclose the heat exchanging channels 12a inside the fins 12. That is, in other embodiments, heat exchange slot 110 may be omitted from heat exchange region 100a of sheet 100.

The specific structure of the tablet 100 is described in detail below.

In this embodiment, the manifold 140 includes 2-4 layers of tubes. The number of layers of the tube body is too large, so that the difficulty of the manufacturing process is increased. The pressure resistance and the difficulty of the manufacturing process are comprehensively considered, and the collecting pipe 140 comprises 2-4 layers of pipe bodies.

In some embodiments, as shown in fig. 1-5, the joint between the inner wall of the outer tube 140b and the abutting surface 102 has a first arc surface 141. The first circular arc surface 141 protrudes toward the inner tube 140 a. The outer wall of the free end of the pipe body adjacent to the outer pipe 140b (the outer wall of the free end of the inner pipe 140a) has a second arc surface 142 corresponding to the first arc surface 141. The second arc surface 142 is wrapped on the first arc surface 141 and is in close contact with the first arc surface 141. In this way, the thickness of the first arc surface 141 of the outer tube 140b can be increased, thereby further increasing the pressure resistance of the header 240.

In the present embodiment, the pipe body (inner pipe 140a) adjacent to the outer pipe 140b has an engagement end surface 143, and the engagement end surface 143 connects the outer wall and the inner wall of the pipe body (inner pipe 140a) adjacent to the outer pipe 140 b. The engaging end surface 143 is located on the same plane as the abutting surface 102. Thus, the tube (inner tube 140a) adjacent to the outer tube 140b can be prevented from interfering with the adhesion of the two sheet bodies 100.

In this embodiment, the end of the outer tube 140b away from the abutting surface 102 is connected to the tube body (inner tube 140a) adjacent to the outer tube. Thus, the pressure resistance of the header 140 can be further increased.

In the present embodiment, the header 140 further includes a convex arc portion 140 c. The end of the outer tube 140b remote from the abutting surface 102 is connected to the tube body (inner tube 140a) adjacent thereto by a convex arc portion 140 c. The convex arc parts 140c are used for connection, so that the collecting pipe 140 of one fin 12 is more favorably inserted into the collecting pipe 140 of the other fin 12 in the two adjacent fins 12. When the header 140 includes two layers of tubes, one end of the outer tube 140b, which is away from the attachment surface 102, is connected to the inner tube 140a through the convex arc portion 140c, that is, the two layers of tubes are connected end to end.

In the present embodiment, the junction between the outer wall of the outer tube 140b and the heat exchange surface 104 has a third arc surface 144. As shown in fig. 17, when the header 140 of one fin 12 is inserted into the header 140 of the other fin 12 of the two adjacent fins 12, the third arc surface 144 of the header 140 of one fin 12 can be covered on the arc portion 140c of the header 140 of the other fin 12 and can be in close contact with the arc portion 140c, thereby further increasing the pressure resistance of the supply/discharge passage 10 b.

In some embodiments, as shown in fig. 21, the number of the pipe bodies of the header 140 is equal to or greater than three, wherein the pipe body located between the inner pipe 140a and the outer pipe 140b is a middle pipe 140d, and the number of the middle pipes 140d is equal to or greater than 1.

In this embodiment, two ends of each middle tube 140d are respectively connected to two adjacent layers of tubes, that is, the multi-layer tubes are connected end to end. Thus, the pressure resistance of the header 140 can be further increased. In this embodiment, the header 140 includes three tubes, and two ends of the middle tube 140d are respectively connected to the inner tube 140a and the outer tube 140 b.

In this embodiment, the middle tube 140d is connected to the tube adjacent thereto by a convex arc portion 140 c.

In this embodiment, one end of the inner tube 110a is connected to the tube body (the middle tube 140d) adjacent to the inner tube 110a, an outer wall of the other end (the free end) of the inner tube 110a includes a second arc surface 142, and the second arc surface 142 is wrapped on the arc portion 140c and is in close contact with the arc portion 140 c. Thus, the thickness of the arc portion 140c can be increased, and the pressure resistance of the manifold 140 can be further increased.

In the present embodiment, the process of forming the manifold 140 includes a drawing process and a back extrusion process. As shown in fig. 22, a drawing process is first performed on a plate 310 to obtain a first intermediate structure 320; then, performing a reverse extrusion process on the first intermediate structure 320 to obtain a second intermediate structure 330; removing the blocking portion 332 on the third intermediate structure 330 to obtain a third intermediate structure 340; finally, chamfering is performed on the free end of the inner pipe of the third intermediate structure 340, so that the free end of the inner pipe is wrapped at the corner of the pipe body adjacent to the free end of the inner pipe, and the collecting pipe 140 is obtained. Thus, the resulting header 140 includes two layers of tubes. When it is desired to obtain a manifold 140 including three or more tubes, the backward extrusion process is repeated before obtaining the third intermediate structure 340.

The utility model also provides a indirect heating equipment, this indirect heating equipment include foretell heat exchanger 10. The heat exchange equipment can be a refrigerator, a dehumidifier, an air conditioner indoor unit, an air conditioner outdoor unit and the like.

The utility model discloses still provide an air conditioner, this air conditioner includes foretell heat exchanger 10. The air conditioner can be an integral air conditioner, a split air conditioner or other types of air conditioners.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (19)

1. The utility model provides a lamellar body for forming the fin, the lamellar body have binding face and with the heat-transfer face that the binding face carried on the back mutually, its characterized in that, the lamellar body includes:

the flow collecting area is provided with a flow collecting hole at the joint face, the flow collecting area is provided with an outward convex flow collecting pipe at the heat exchange face, the flow collecting pipe comprises a plurality of layers of pipe bodies, two adjacent layers of the pipe bodies are tightly contacted in the direction from inside to outside, the pipe body positioned on the innermost layer is an inner pipe, the inner pipe is communicated with the flow collecting hole, and the pipe body positioned on the outermost layer is an outer pipe.

2. The fin body according to claim 1, wherein a joint between the inner wall of the outer tube and the abutting surface has a first arc surface protruding toward the inner tube, and the outer wall of the tube body adjacent to the outer tube has a second arc surface corresponding to the first arc surface, and the second arc surface is wrapped on and in close contact with the first arc surface.

3. The sheet body for forming fins of claim 2 wherein the tubes adjacent to the outer tube have engaging end surfaces that connect the outer and inner walls of the tubes adjacent to the outer tube, the engaging end surfaces being coplanar with the abutment surfaces.

4. The sheet for forming fins of claim 1 wherein a plurality of layers of said tubes are joined end to end.

5. The sheet body for forming fins according to claim 4, wherein said header further comprises an outwardly convex circular arc portion, and two adjacent layers of said tubes are connected by said circular arc portion.

6. The fin body according to claim 5, wherein a junction between the outer wall of the outer tube and the heat exchange surface has a third arc surface, and when a plurality of fins are arranged in the thickness direction, the third arc surface of the header of one fin can be wrapped on and tightly contacted with the arc portion of the header of another fin.

7. The fin body as claimed in claim 5, wherein the tube body between the inner tube and the outer tube is a middle tube, the number of the middle tubes is at least 1, the outer wall of the free end of the inner tube includes a second arc surface, and the second arc surface is wrapped on the adjacent arc portion and is in close contact with the arc portion.

8. The sheet body for forming fins according to claim 1, wherein the process for forming the header includes a drawing process and a back extrusion process.

9. The sheet body for forming fins of any one of claims 1-8, further comprising a heat exchange zone having a concave heat exchange slot at the faying surface; the collecting holes are communicated with the heat exchange grooves.

10. The sheet body for forming fins according to claim 9 wherein there are two of said heat transfer regions, and two of said heat transfer regions are located at opposite ends of the length of said heat transfer region.

11. A fin comprising two sheets as claimed in claim 9 or 10, wherein the bonding surfaces of the two sheets are bonded, the heat exchanging grooves of the two sheets enclose a heat exchanging channel of the fin, and the collecting pipes of the two sheets are communicated to form a collecting channel of the fin.

12. The fin according to claim 11, wherein in the header passage, an inner diameter of the inner tube of one header is matched with an outer diameter of the outer tube of another header, so that when a plurality of fins are arranged in a thickness direction, one header of one fin can be inserted into the header of another fin and can be in contact fit or interference fit with the header.

13. A fin, comprising:

a first tablet which is a tablet according to any one of claims 1 to 10; and

the second sheet body is provided with a bonding corresponding surface and a heat exchange corresponding surface opposite to the bonding corresponding surface, the second sheet body comprises a current collection corresponding area, the current collection corresponding area is provided with a current collection corresponding hole at the bonding corresponding surface, the current collection corresponding area is provided with a current collection corresponding pipe protruding outwards at the heat exchange corresponding surface, and the current collection corresponding pipe is communicated with the current collection corresponding hole;

the corresponding attaching surface is attached to the attaching surface, and the collecting corresponding pipe is communicated with the collecting pipe through the collecting corresponding hole and the collecting hole to form a collecting channel of the fin.

14. The fin according to claim 13, wherein in the header passage, an inner diameter of the header corresponding tube matches an outer diameter of the outer tube of the header or an outer diameter of the header corresponding tube matches an inner diameter of the inner tube of the header, so that when a plurality of fins are arranged in a thickness direction, the header corresponding tube of one fin can be inserted into the header of another fin and contact-fitted or interference-fitted with the header.

15. The fin according to claim 14, wherein said manifold counter tubes comprise at least one layer of said tubes.

16. The fin according to claim 13, wherein the second fin body further comprises a heat exchange corresponding region having a heat exchange corresponding groove recessed inward at the fit corresponding surface, and the header corresponding hole communicates with the heat exchange corresponding groove;

when the first sheet body is provided with the heat exchange grooves, the heat exchange corresponding grooves and the heat exchange grooves are encircled to form heat exchange channels of the fins;

when the first sheet body does not have the heat exchange groove, the heat exchange corresponding groove and the binding surface enclose to form a heat exchange channel of the fin.

17. A heat exchanger comprising a plurality of fins as set forth in any one of claims 11 to 16, the plurality of fins being arranged in a thickness direction with an air flow passage formed between adjacent ones of the fins.

18. A heat exchange apparatus comprising the heat exchanger of claim 17.

19. An air conditioner comprising the heat exchanger of claim 17.

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