CN220083797U - Heat exchange fin, heat exchange fin assembly, tube fin assembly and heat exchanger - Google Patents

Abstract

The utility model provides a heat exchange fin, a heat exchange fin assembly, a tube fin assembly and a heat exchanger. The heat exchange fin comprises a main body, wherein mounting holes penetrating the main body in the thickness direction and arranged in double rows are formed in the main body at intervals, the mounting holes are used for mounting U-shaped heat exchange tubes, and two straight tubes of the U-shaped heat exchange tubes are respectively mounted in two adjacent rows of mounting holes; the main part includes along length direction's first border and second border that extends, is equipped with a plurality of hem of buckling to one side of main part along thickness direction on the first border, and a plurality of edge length direction intervals of folding set up. According to the utility model, the mounting holes arranged in double rows are arranged on the main body of the heat exchange fin, so that the integral number of the heat exchange fins in the same row can be reduced, and the heat exchange fins in the same row are prevented from being misplaced; through the hem of buckling that sets up on first border interval, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency.

Description

Heat exchange fin, heat exchange fin assembly, tube fin assembly and heat exchanger

Technical Field

The utility model relates to the field of heat exchangers, in particular to a heat exchange fin, a heat exchange fin assembly, a tube fin assembly and a heat exchanger.

Background

In the gas water heater with the fin heat exchanger, through holes which are convenient for the heat exchange tubes to pass through are arranged on the fins, the fins absorb heat in the flue gas, and then the heat is transferred to the heat exchange tubes which pass through the fins to heat cold water in the heat exchange tubes.

In the prior art, a plurality of rows of single heat exchange tubes are arranged in a heat exchange shell, and single fins are arranged corresponding to the plurality of heat exchange tubes in the single row, so that the number of the heat exchange fins in the same row is too large, dislocation is easy to generate, the resistance to smoke is too large, and the smoke aggregation exceeds standard.

Disclosure of Invention

The utility model aims to overcome the defect that in the prior art, a single fin is arranged corresponding to a single row of heat exchange tubes, so that the number of heat exchange fins in the same row is excessive, and provides a heat exchange fin, a heat exchange fin assembly, a tube fin assembly and a heat exchanger.

The utility model solves the technical problems by the following technical scheme:

the heat exchange fin is characterized by comprising a main body, wherein mounting holes penetrating through the main body in the thickness direction and arranged in double rows are formed in the main body at intervals, the mounting holes are used for mounting U-shaped heat exchange tubes, and two straight tubes of the U-shaped heat exchange tubes are respectively mounted in two adjacent rows of the mounting holes;

the main body comprises a first edge and a second edge which extend along the length direction, wherein a plurality of folded edges which are bent towards one side of the main body along the thickness direction are arranged on the first edge, and a plurality of folded edges are arranged at intervals along the length direction.

In the technical scheme, the mounting holes which are used for mounting the U-shaped heat exchange tubes and are arranged in double rows are formed in the main bodies of the heat exchange fins at intervals, so that the overall number of the heat exchange fins in the same row can be reduced, and the heat exchange fins in the same row are prevented from being misplaced; further, through set up a plurality of hem of buckling of setting up along length direction interval on first border, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency.

Preferably, the main body of the heat exchange fin comprises a third edge and a fourth edge which extend along the width direction and are oppositely arranged, the third edge is provided with a first flanging which turns up to one side of the main body along the thickness direction, and/or the fourth edge is provided with a second flanging which turns up to one side of the main body along the thickness direction;

the first flange and the second flange turn over towards the same side of the main body along the thickness direction.

In the technical scheme, the first flanging is arranged on the third edge, so that the flow channel speed of the smoke can be reduced, the heat exchange time is prolonged, and the beneficial technical effect of improving the heat exchange efficiency is achieved; the second flanging is arranged on the fourth edge, so that the flow channel speed of the smoke can be reduced, and the heat exchange time is prolonged, thereby achieving the beneficial technical effect of improving the heat exchange efficiency; through setting up first turn-ups and second turn-ups and turning over to the same side of main part along thickness direction, can reduce heat transfer fin's whole occupation space.

Preferably, the first flanging is provided with a first concave part which is concave towards the center of the heat exchange fin, and/or the second flanging is provided with a second concave part which is concave towards the center of the heat exchange fin; and/or the number of the groups of groups,

the first flanging is provided with a first notch, the first notch is arranged corresponding to the comb tool, and/or the second flanging is provided with a second notch, and the second notch is arranged corresponding to the comb tool.

In the technical scheme, the first flanging is provided with the first concave part which is concave towards the center of the heat exchange fin, so that high-temperature flue gas can be gathered to the middle position of the heat exchange fin, and the flue gas is uniformly distributed; through setting up the second concave part that is sunken to heat transfer fin center at the second turn-ups, can gather the intermediate position of heat transfer fin with the flue gas of high temperature, make flue gas evenly distributed. The first notch is arranged on the first flanging, so that the comb tool can be conveniently installed; through set up the second breach on the second turn-ups, can make things convenient for the installation of comb frock.

Preferably, the mounting holes in the same column are aligned along the length direction; and/or the number of the groups of groups,

the mounting holes of two adjacent rows of two straight pipes for mounting the same U-shaped heat exchange pipe are obliquely arranged along the width direction; and/or the number of the groups of groups,

at least one of the mounting holes is provided with a third flange extending in the circumferential direction thereof and turned up to one side of the main body in the thickness direction.

In the technical scheme, the mounting holes in the same row are aligned along the length direction, so that the U-shaped heat exchange tubes in the same row are convenient to align and mount; the two adjacent rows of mounting holes for mounting the two straight pipes of the same U-shaped heat exchange pipe are obliquely arranged along the width direction, that is to say, the U-shaped heat exchange pipes are obliquely arranged, so that flue gas is more favorable for entering between the adjacent heat exchange fins which are arranged at intervals along the extending direction of the U-shaped heat exchange pipes, and heat exchange is uniformly carried out around the circumference of the straight pipes of the U-shaped heat exchange pipes. Through setting up the third turn-ups on the mounting hole, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency.

Preferably, a first groove which is recessed inwards along the width direction is formed in the first edge, the folded edge is arranged in the first groove, and a gap is formed between the side surface of the folded edge and the inner wall surface of the first groove;

the second edge of the heat exchange fin is provided with a second groove which is recessed inwards along the width direction, and the second groove is arranged at a position corresponding to the first groove of the first edge.

In the technical scheme, as the outer edge of the folded edge is formed by the openings on the dividing line between the two adjacent heat exchange fins, the position of the folded edge before folding and part of the openings form a first groove together, so that the material of the heat exchange fins is effectively utilized; and, because have the clearance (open pore causes) between the side of hem and the internal wall of first recess, make the hem buckle more easily, can not exert an influence to surrounding structure to make heat exchange fin's overall structure more stable. The second grooves on the second edges are formed simultaneously by the holes on the dividing lines between the two adjacent heat exchange fins, so that the material consumption of the heat exchange fins can be further reduced, and the manufacturing cost of the heat exchange fins is reduced.

The utility model provides a heat transfer fin subassembly, its characterized in that, heat transfer fin subassembly includes a plurality of heat transfer fins as described above, and a plurality of heat transfer fins links to each other in proper order along the width direction, and is adjacent be equipped with along the split line that length direction extends between the heat transfer fin, heat transfer fin's outward flange is through being located trompil formation on the split line.

In this technical scheme, through above-mentioned setting, can be through the continuous mode continuous manufacturing a plurality of heat transfer fins who links to each other along width direction of progressive die to can improve the speed of manufacturing heat transfer fin greatly, save heat transfer fin's cost of manufacture.

The heat exchange fin assembly is characterized by comprising at least one group of U-shaped heat exchange tubes and a plurality of heat exchange fins, wherein each group of U-shaped heat exchange tubes comprises a plurality of U-shaped heat exchange tubes which are arranged in a stacked mode at intervals along the flowing direction of flue gas, each heat exchange fin is arranged on all U-shaped heat exchange tubes, and a plurality of heat exchange fins are arranged at intervals in sequence along the extending direction of the U-shaped heat exchange tubes.

In the technical scheme, the heat exchange fins are adopted in the tube fin assembly, so that the integral number of the heat exchange fins in the same row can be reduced, and dislocation of the heat exchange fins in the same row is avoided; further, through setting up the hem, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency. Meanwhile, compared with the prior art that a single heat exchange tube is adopted, the water boxes are required to be arranged at the end parts of a plurality of heat exchange tubes in a matched manner for connection, and the problems that the connection process of the water boxes is complex and the cost is high exist.

Preferably, the U-shaped heat exchange tube comprises an inner tube and an outer tube, and the inner tube is connected to the inner side of the outer tube in an expanding manner; the inner tube is made of copper, and the outer tube is made of aluminum.

In the technical scheme, through the arrangement, namely the U-shaped heat exchange tube adopts a copper-aluminum composite tube, the copper-aluminum composite tube combines the high thermal conductivity of the aluminum tube and the copper tube, and the heat transfer efficiency is high; meanwhile, the corrosion resistance of the aluminum pipe is utilized, so that the corrosion phenomenon is avoided under the condition of condensed water, the service life is prolonged, and the heat exchange efficiency is improved. Firm connection between the aluminum pipe and the copper pipe is ensured through the connection mode of expansion connection, so that the inner pipe and the outer pipe after expansion connection can be used as an integral heat exchange pipe.

Preferably, the U-shaped heat exchange tube is connected to the inner side of the mounting hole of the heat exchange fin in an expanding mode.

In the technical scheme, firm connection between the U-shaped heat exchange tube and the heat exchange fins is ensured through the expansion connection mode, so that the expanded U-shaped heat exchange tube and the expanded heat exchange fins can be used as an integral tube fin assembly.

A heat exchanger, the heat exchanger comprising:

the shell is internally provided with a heat exchange cavity;

the U-shaped heat exchange tube is inserted into the heat exchange cavity, the heat exchange fins are positioned in the heat exchange cavity, and the first edges of the heat exchange fins are arranged close to the central position in the heat exchange cavity.

The utility model has the positive progress effects that:

according to the utility model, the mounting holes which are used for mounting the U-shaped heat exchange tubes and are arranged in double rows are formed in the main body of the heat exchange fin at intervals, so that the integral number of the heat exchange fins in the same row can be reduced, and the heat exchange fins in the same row are prevented from being misplaced; further, through set up a plurality of hem of buckling of setting up along length direction interval on first border, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency.

Drawings

Fig. 1 is a schematic perspective view of a heat exchange fin according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic front view of a heat exchange fin according to a preferred embodiment of the present utility model.

Fig. 3 is a schematic top view of a heat exchange fin according to a preferred embodiment of the present utility model.

Fig. 4 is a schematic front view of a heat exchange fin assembly according to a preferred embodiment of the present utility model.

Fig. 5 is a schematic perspective view of a tube fin assembly according to a preferred embodiment of the present utility model.

Fig. 6 is a schematic view of a partial enlarged structure of a portion a in fig. 5.

Fig. 7 is a schematic front view of a U-shaped heat exchange tube with a fin assembly according to a preferred embodiment of the present utility model.

Fig. 8 is a partially enlarged schematic view of the portion B in fig. 7.

Fig. 9 is a schematic cross-sectional view of a heat exchanger according to a preferred embodiment of the present utility model.

Fig. 10 is a partially enlarged schematic view of the portion C in fig. 9.

FIG. 11 is a schematic cross-sectional view of a heat exchanger according to another embodiment of the present utility model.

Description of the reference numerals

Heat exchange fin 1

Body 10

First edge 11

First groove 111

Second edge 12

Second groove 121

Third edge 13

Fourth edge 14

Mounting holes 15

Hemming 21

Gap 22

First flange 31

First concave portion 311

First notch 312

Second flange 32

Second recess 321

Second notch 322

Third turned-up edge 33

Heat exchange fin assembly 4

Parting line 41

Opening 42

Tube fin assembly 5

U-shaped heat exchange tube 6

Straight pipe 61

Connecting pipe 62

Inner tube 63

Flaring 631

Outer tube 64

Elbow pipe 7

Housing 8

Heat exchange chamber 81

Detailed Description

As shown in fig. 1 to 3, the present embodiment provides a heat exchange fin 1. The heat exchange fin 1 comprises a main body 10, wherein mounting holes 15 penetrating through the main body 10 in the thickness direction H and arranged in double rows are formed in the main body 10 at intervals, the mounting holes 15 are used for mounting U-shaped heat exchange tubes 6, and two straight tubes 61 of the U-shaped heat exchange tubes 6 are respectively mounted in two adjacent rows of mounting holes 15; the main body 10 includes a first edge 11 and a second edge 12 extending in a length direction L, and the first edge 11 is provided with a plurality of folded edges 21 bent to one side of the main body 10 in a thickness direction H, and the plurality of folded edges 21 are arranged at intervals in the length direction L.

In this way, the mounting holes 15 for mounting the U-shaped heat exchange tubes 6 are formed in the main body 10 of the heat exchange fin 1 at intervals in double rows, so that the overall number of the heat exchange fins 1 in the same row can be reduced, and the heat exchange fins 1 in the same row are prevented from being misplaced; further, through set up a plurality of hem 21 of buckling that set up along length direction L interval on first border 11, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency.

The heat exchange fin 1 is made of aluminum. The aluminum material has high thermal conductivity and high heat transfer efficiency; meanwhile, the heat exchanger has the anti-corrosion characteristic, so that the corrosion phenomenon does not occur under the condition of condensed water, the service life is prolonged, and the heat exchange efficiency is improved.

In the present embodiment, the main body 10 of the heat exchange fin 1 includes a third edge 13 and a fourth edge 14 which extend in the width direction W and are disposed opposite to each other, the third edge 13 is provided with a first flange 31 which is turned up to one side of the main body 10 in the thickness direction H, and the fourth edge 14 is provided with a second flange 32 which is turned up to one side of the main body 10 in the thickness direction H; the first flange 31 and the second flange 32 are turned up to the same side of the main body 10 in the thickness direction H. In this way, the first flanging 31 is arranged on the third edge 13, so that the flow channel speed of the flue gas can be reduced, and the heat exchange time can be prolonged, thereby achieving the beneficial technical effect of improving the heat exchange efficiency; the second flanging 32 is arranged on the fourth edge 14, so that the flow passage speed of the flue gas can be reduced, and the heat exchange time can be prolonged, thereby achieving the beneficial technical effect of improving the heat exchange efficiency; by providing the first flange 31 and the second flange 32 to be turned over in the thickness direction H toward the same side of the main body 10, the overall occupation space of the heat exchange fin 1 can be reduced.

However, in other embodiments, only the third edge 13 may be provided with the first flange 31 turned up to one side of the main body 10 in the thickness direction H, or only the fourth edge 14 may be provided with the second flange 32 turned up to one side of the main body 10 in the thickness direction H, and may be adjusted according to design requirements.

Further, the first flange 31 is provided with a first recess 311 recessed toward the center of the heat exchange fin 1, and the second flange 32 is provided with a second recess 321 recessed toward the center of the heat exchange fin 1. In this way, by arranging the first concave part 311 which is concave towards the center of the heat exchange fin 1 in the first flanging 31, the high-temperature flue gas can be gathered to the middle position of the heat exchange fin 1, so that the flue gas is uniformly distributed; by arranging the second concave portion 321 which is concave towards the center of the heat exchange fin 1 in the second flanging 32, high-temperature flue gas can be gathered to the middle position of the heat exchange fin 1, so that the flue gas is uniformly distributed.

However, in other embodiments, the first recess 311 recessed toward the center of the heat exchange fin 1 may be provided only in the first flange 31, or the second recess 321 recessed toward the center of the heat exchange fin 1 may be provided only in the second flange 32, and the configuration may be adjusted according to the design requirements.

The first flange 31 is provided with a first notch 312, the first notch 312 corresponds to the comb fixture, the second flange 32 is provided with a second notch 322, and the second notch 322 corresponds to the comb fixture. In this way, the first notch 312 is arranged on the first flanging 31, so that the comb tool can be conveniently installed; by providing the second notch 322 on the second flange 32, the installation of the comb tooling can be facilitated.

However, in other embodiments, the first notch 312 may be provided only in the first flange 31, or the second notch 322 may be provided only in the second flange 32, and the configuration may be adjusted according to design requirements.

In this embodiment, all the mounting holes 15 on the main body 10 are provided with the third flanges 33 extending along the circumferential direction thereof and turned up to one side of the main body 10 along the thickness direction H, so as to reduce the flow path speed of the flue gas and prolong the heat exchange time, thereby achieving the beneficial technical effect of improving the heat exchange efficiency. However, in other embodiments, one of the mounting holes 15 on the main body 10 may be provided with the third flange 33, or a part of the mounting holes 15 on the main body 10 may be provided with the third flange 33, which may be adjusted according to design requirements.

Preferably, the folded edge 21, the first folded edge 31, the second folded edge 32 and the third folded edge 33 are all turned over towards the same side of the main body 10 along the thickness direction H, so that the overall occupied space of the heat exchange fin 1 can be reduced. Preferably, the heights (dimensions in the thickness direction) of the flange 21, the first flange 31, the second flange 32, and the third flange 33 are all the same.

In this embodiment, the mounting holes 15 in the same column are aligned in the length direction L, so that the U-shaped heat exchange tubes 6 in the same column are conveniently aligned.

The mounting holes 15 of two adjacent columns of the two straight pipes 61 for mounting the same U-shaped heat exchange tube 6 are obliquely arranged along the width direction W, that is, the U-shaped heat exchange tube 6 is obliquely arranged, so that flue gas is more favorable for entering between the adjacent heat exchange fins 1 which are arranged at intervals along the extending direction of the U-shaped heat exchange tube 6, and heat exchange is uniformly carried out around the circumference of the straight pipes 61 of the U-shaped heat exchange tube 6.

Further, a first groove 111 recessed inward in the width direction W is provided on the first edge 11, the folded edge 21 is provided in the first groove 111, and a gap 22 is provided between a side surface of the folded edge 21 and an inner wall surface of the first groove 111; the second edge 12 of the heat exchange fin 1 is provided with a second groove 121 recessed inward in the width direction W, and the second groove 121 is disposed corresponding to the position of the first groove 111 of the first edge 11.

Since the outer edge of the folded edge 21 is formed by the openings 42 on the dividing line 41 between two adjacent heat exchange fins 1, the position of the folded edge 21 before bending and part of the openings 42 form the first groove 111 together, so that the material of the heat exchange fins 1 is effectively utilized; in addition, since the gap 22 (formed by the opening 42) is formed between the side surface of the folded edge 21 and the inner wall surface of the first groove 111, the folded edge 21 is easier to bend, and the surrounding structure is not affected, so that the overall structure of the heat exchange fin 1 is more stable. The openings 42 on the parting line 41 between two adjacent heat exchange fins 1 simultaneously form the second grooves 121 on the second edge 12, so that the material consumption of the heat exchange fins 1 can be further reduced, and the manufacturing cost of the heat exchange fins 1 is reduced.

As shown in fig. 4, this embodiment also provides a heat exchange fin assembly 4, where the heat exchange fin assembly 4 includes a plurality of heat exchange fins 1 as described above, the plurality of heat exchange fins 1 are sequentially connected in the width direction W, a dividing line 41 extending in the length direction L is provided between adjacent heat exchange fins 1, and the outer edge of the folded edge 21 of the heat exchange fin 1 is formed by an opening 42 located on the dividing line 41. Thus, by the above arrangement, a plurality of heat exchange fins 1 connected in the width direction W (finally, two adjacent heat exchange fins 1 are separated at the dividing line 41) can be continuously manufactured by the continuous die, so that the speed of manufacturing the heat exchange fins 1 can be greatly increased, and the manufacturing cost of the heat exchange fins 1 can be saved.

As shown in fig. 5 to 8, the present embodiment further provides a tube fin assembly 5, which includes at least one group of U-shaped heat exchange tubes 6 and a plurality of heat exchange fins 1 as described above, wherein each group of U-shaped heat exchange tubes 6 includes a plurality of U-shaped heat exchange tubes 6 stacked at intervals along the flow direction O of the flue gas, each heat exchange fin 1 is mounted on all of the U-shaped heat exchange tubes 6, and the plurality of heat exchange fins 1 are sequentially stacked at intervals along the extending direction of the U-shaped heat exchange tubes 6. Wherein the extending direction of the U-shaped heat exchange tube 6 is the thickness direction H of the heat exchange fin 1; the flow direction O of the flue gas is shown in fig. 11.

In this way, the heat exchange fins 1 are adopted in the tube fin assembly 5, so that the overall number of the heat exchange fins 1 in the same row can be reduced, and the heat exchange fins 1 in the same row are prevented from being misplaced; further, through setting up hem 21, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency. Meanwhile, compared with the prior art that a single heat exchange tube is adopted, the water boxes are required to be arranged at the end parts of a plurality of heat exchange tubes in a matched manner for connection, and the problems that the connection process of the water boxes is complex and the cost is high exist, the U-shaped heat exchange tube 6 is adopted in the tube fin assembly 5 of the technical scheme, so that the use of half of the water boxes can be reduced, the beneficial technical effects of simplifying the process and reducing the cost are achieved, and the manufacturability is greatly improved.

The U-shaped heat exchange tube 6 includes two straight tubes 61 arranged in parallel, and a connection tube 62 connected between the two straight tubes 61. The U-shaped heat exchange tube 6 is integrally bent or bent.

The distance between the main bodies of two adjacent heat exchange fins 1 is 2.7 mm-3.5 mm; the heights of the folded edge 21, the first folded edge 31, the second folded edge 32 and the third folded edge 33 are 2.5 mm-3 mm; the gap between two adjacent heat exchange fins 1 is 0.2 mm-0.5 mm. The spacing between the main bodies of two adjacent heat exchange fins 1 is the sum of the highest height of the folded edge 21, the first folded edge 31, the second folded edge 32 and the third folded edge 33 and the gap between the two adjacent heat exchange fins 1. The heights of the folded edge 21, the first folded edge 31, the second folded edge 32 and the third folded edge 33 may be the same or different, but all of them roll over in the thickness direction H toward the same side of the main body, so that the overall occupied space of the heat exchange fin 1 can be reduced.

In the embodiment, the U-shaped heat exchange tube 6 comprises an inner tube 63 and an outer tube 64, wherein the inner tube 63 is connected to the inner side of the outer tube 64 in an expanding manner; the inner tube 63 is made of copper, the outer tube 64 is made of aluminum, namely, the U-shaped heat exchange tube 6 is made of a copper-aluminum composite tube, and the copper-aluminum composite tube combines high heat conductivity of an aluminum tube and a copper tube, so that the heat transfer efficiency is high; meanwhile, the corrosion resistance of the aluminum pipe is utilized, so that the corrosion phenomenon is avoided under the condition of condensed water, the service life is prolonged, and the heat exchange efficiency is improved. Firm connection between the aluminum pipe and the copper pipe is ensured through the expansion connection mode, so that the expanded inner pipe 63 and the expanded outer pipe 64 can be used as an integral heat exchange pipe. The expansion process is a process in which a pressure is applied to a liquid (water or oil) in a heat exchanger, and the metal is deformed by the pressure to be connected together.

As described above, the U-shaped heat exchange tube 6 includes two straight tubes 61 arranged in parallel, and the connection tube 62 connected between the two straight tubes 61. That is, the inner tube 63 and the outer tube 64 each include two straight tubes arranged in parallel, and a connecting tube connected between the two straight tubes. In the manufacturing process, the inner tube 63 and the outer tube 64 are sleeved together, bent into a U-shaped tube, and then firmly fixed together through an expansion joint process.

The end of the straight pipe of the inner pipe 63 far away from the connecting pipe of the inner pipe 63 protrudes out of the end of the straight pipe of the outer pipe 64 far away from the connecting pipe of the outer pipe 64, and the end of the straight pipe of the inner pipe 63 far away from the connecting pipe of the inner pipe 63 is provided with a flaring 631, so that subsequent welding of the bent pipe connected with the flaring is facilitated.

Preferably, the U-shaped heat exchange tube 6 is connected to the inner side of the mounting hole 15 of the heat exchange fin 1 in an expanding manner. Therefore, firm connection between the U-shaped heat exchange tube 6 and the heat exchange fins 1 is ensured through the expansion connection mode, and the U-shaped heat exchange tube 6 and the heat exchange fins 1 after expansion connection can be used as an integral tube fin assembly 5.

As shown in fig. 9 to 11, the present embodiment also provides a heat exchanger including: the housing 8 and the tube fin assembly 5 as described above. A heat exchange chamber 81 is provided in the housing 8.

The U-shaped heat exchange tube 6 of the tube fin assembly 5 is inserted into the heat exchange cavity 81, the heat exchange fins 1 are located in the heat exchange cavity 81, and the first edges 11 of the heat exchange fins 1 are arranged close to the central position in the heat exchange cavity 81. The first edge 11 of the heat exchange fin 1 is arranged close to the central position in the heat exchange cavity 81, so that the folded edge 21 on the first edge 11 is arranged close to the central position in the heat exchange cavity 81, and the flue gas with higher temperature in the central area is better gathered.

The bent pipe 7 located outside the housing 8 is connected to the tube fin assembly 5 at the flared end 631 on the inner tube 63 of the U-shaped heat exchange tube 6.

The heat exchanger of the embodiment can reduce the overall number of the heat exchange fins 1 in the same row by adopting the heat exchange fins 1, and avoid the dislocation of the heat exchange fins 1 in the same row; further, through setting up hem 21, can reduce the runner speed of flue gas, extension heat transfer time to reach the beneficial technical effect who improves heat exchange efficiency. Meanwhile, the heat exchanger can reduce the use of half of the water box by adopting the U-shaped heat exchange tube 6, thereby achieving the beneficial technical effects of simplifying the process and reducing the cost and greatly increasing the manufacturability.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (10)

1. The heat exchange fin is characterized by comprising a main body, wherein mounting holes penetrating through the main body in the thickness direction and arranged in double rows are formed in the main body at intervals, the mounting holes are used for mounting U-shaped heat exchange tubes, and two straight tubes of the U-shaped heat exchange tubes are respectively mounted in two adjacent rows of the mounting holes;

the main body comprises a first edge and a second edge which extend along the length direction, wherein a plurality of folded edges which are bent towards one side of the main body along the thickness direction are arranged on the first edge, and a plurality of folded edges are arranged at intervals along the length direction.

2. The heat exchange fin according to claim 1, wherein the main body of the heat exchange fin includes a third edge and a fourth edge which extend in a width direction and are disposed opposite to each other, the third edge being provided with a first turn-up turned up to one side of the main body in a thickness direction, and/or the fourth edge being provided with a second turn-up turned up to one side of the main body in the thickness direction;

the first flange and the second flange turn over towards the same side of the main body along the thickness direction.

3. The heat exchange fin according to claim 2, wherein the first flange is provided with a first recess recessed toward the center of the heat exchange fin, and/or the second flange is provided with a second recess recessed toward the center of the heat exchange fin; and/or the number of the groups of groups,

the first flanging is provided with a first notch, the first notch is arranged corresponding to the comb tool, and/or the second flanging is provided with a second notch, and the second notch is arranged corresponding to the comb tool.

4. The heat exchange fin according to claim 1, wherein the mounting holes in the same row are aligned in a length direction; and/or the number of the groups of groups,

the mounting holes of two adjacent rows of two straight pipes for mounting the same U-shaped heat exchange pipe are obliquely arranged along the width direction; and/or the number of the groups of groups,

at least one of the mounting holes is provided with a third flange extending in the circumferential direction thereof and turned up to one side of the main body in the thickness direction.

5. The heat exchange fin according to any one of claims 1 to 4, wherein a first groove recessed inward in a width direction is provided on the first edge, the folded edge is provided in the first groove, and a gap is provided between a side surface of the folded edge and an inner wall surface of the first groove;

the second edge of the heat exchange fin is provided with a second groove which is recessed inwards along the width direction, and the second groove is arranged at a position corresponding to the first groove of the first edge.

6. A heat exchange fin assembly, characterized in that the heat exchange fin assembly comprises a plurality of heat exchange fins according to any one of claims 1-5, wherein a plurality of heat exchange fins are sequentially connected in the width direction, a parting line extending in the length direction is arranged between adjacent heat exchange fins, and the outer edge of the folded edge of the heat exchange fin is formed by an opening positioned on the parting line.

7. A tube and fin assembly comprising at least one set of U-shaped heat exchange tubes and a plurality of heat exchange fins according to any one of claims 1-5, wherein each set of U-shaped heat exchange tubes comprises a plurality of U-shaped heat exchange tubes stacked at intervals along the flow direction of flue gas, each heat exchange fin is mounted on all the U-shaped heat exchange tubes, and a plurality of heat exchange fins are sequentially stacked at intervals along the direction in which the U-shaped heat exchange tubes extend.

8. A tube and fin assembly as claimed in claim 7, wherein said U-shaped heat exchange tube includes an inner tube and an outer tube, said inner tube being expanded inside said outer tube; the inner tube is made of copper, and the outer tube is made of aluminum.

9. A tube and fin assembly as claimed in claim 7 or 8, wherein said U-shaped heat exchange tube is expanded inside the mounting hole of said heat exchange fin.

10. A heat exchanger, the heat exchanger comprising:

the shell is internally provided with a heat exchange cavity;

a tube and fin assembly as claimed in any one of claims 7 to 9, said U-shaped heat exchange tube being inserted into said heat exchange chamber, said heat exchange fins being located in said heat exchange chamber with first edges of said heat exchange fins being located near a central location within said heat exchange chamber.