JPH1062084A - Manufacture of heat exchanger, and heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the adhesivity between a heat exchange tube and a plate- shaped fin of a heat exchanger and also to facilitate assembly. SOLUTION: Erect pieces 12 and 13 are formed in the opening edge of an insertion hole 2 of a plate-shaped fin 1 and the erect piece 12 on one side is bent from an erection point P toward the other erect piece side, while the bending formation is made so that the fore end of the erect piece 12 is positioned outward from the erection point P. A flat heat exchange tube 3 is inserted into the insertion hole 2 of the plate-shaped fin 1 in a state wherein the shape of a bent part 12a is changed outward by pressing the fore end of the erect piece 12 formed by bending in the direction of the insertion of the flat heat exchange tube 3, and then a pressing force is canceled. Thereby the erect pieces 12 and 13 are brought into close contact with the flat heat exchange tube 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat exchanger and a heat exchanger. More specifically, the present invention relates to a heat exchanger for use in, for example, an air conditioner for a car or a house. The present invention relates to a method of manufacturing a heat exchanger in which a plurality of plate-like fins arranged at intervals and a plurality of stages of heat exchange tubes are contacted and crossed, and a heat exchanger.

[0002]

2. Description of the Related Art As a conventional heat exchanger of this type, as shown in FIG. 9, a plurality of plate-like fins a arranged in parallel at regular intervals, and these plate-like fins a are formed by drilling. A heat exchanger having a heat exchange tube c having a flat cross section penetrating the elongated hole b is known. The use of the heat exchange tube c having a flat cross section has an advantage that the loss of air resistance can be reduced as compared with the heat exchange tube having a circular shape.

In order to manufacture a heat exchanger using such a flat heat exchange tube, a large number of plate-like fins a, for example, 500 are arranged at intervals between opposing jigs, and each plate-like fin a is arranged. The flat heat exchange tube c is inserted into the insertion hole b of the fin a to make the flat fin a and the flat heat exchange tube c adhere to each other, and then integrated by brazing or the like. In this case, as shown in FIG. 10, upstanding pieces d are formed by bending the two sides opposite to the opening edge of the insertion hole b so as to enhance the adhesion between the plate-like fin a and the flat heat exchange tube c. I have to.

[0004]

However, when the upright piece d is provided at the opening edge of the insertion hole b, when the flat heat exchange pipe c is inserted into the insertion hole b, the flat heat exchange pipe c is raised. May be deformed, and the upright piece d may be deformed, and since the deformed upright piece d does not return to its original state, contact between the upright piece d and the flat heat exchange tube c may occur. There is a problem in that the plate fins a and the flat heat exchange tubes c cannot be reliably brazed due to instability and gaps.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a method of manufacturing a heat exchanger and a heat exchanger capable of improving the adhesion between a heat exchange tube and a plate-like fin and facilitating assembly. The purpose is to provide.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there are provided a plurality of plate-like fins arranged at appropriate intervals, and a through-hole provided in these plate-like fins. In manufacturing a heat exchanger including a plurality of flat heat exchange tubes parallel to each other penetrating the hole, upright pieces are formed on two opposite sides of the opening edge of the insertion hole, and The erecting piece is bent from the erecting point toward the other erecting piece, and the tip is bent so as to be located outside the erecting point. The tip of the bent erecting piece is formed by flat heat exchange. By inserting the flat heat exchange tube into the insertion hole of the plate-like fin in the state where the bent portion is deformed outward by pressing in the tube insertion direction, and then releasing the pressing force,
The upright piece and the flat heat exchange tube are brought into close contact with each other.

According to a second aspect of the present invention, there are provided a plurality of plate-like fins arranged at appropriate intervals, and a plurality of flat heat exchange tubes parallel to each other penetrating through insertion holes provided in these plate-like fins. In manufacturing a heat exchanger having: a standing piece formed on two opposing sides of the opening edge of the insertion hole, and one standing piece is bent from the standing point toward the other standing piece. At the same time, the tip is bent so that the tip is located inward from the standing point, and after inserting the flat heat exchange tube into the insertion hole of the plate-like fin, the tip of the bent piece of the standing piece is bent. The upright piece and the flat heat exchange tube are brought into close contact with each other by pressing in the insertion direction of the flat heat exchange tube.

According to a third aspect of the present invention, in the method for manufacturing a heat exchanger according to the first or second aspect, the plate-like fins and the flat heat exchange tubes are formed of an aluminum alloy member.
An aluminum alloy layer having a lower melting point than the plate-shaped fins and the flat heat exchange tubes is formed on at least one surface of the plate-shaped fins or the flat heat exchange tubes, and the plate-shaped fins and the flat heat exchange tubes are formed. And brazing an exchange tube.

According to a fourth aspect of the present invention, there are provided a plurality of plate-like fins arranged at appropriate intervals, and a plurality of flat heat-exchange tubes parallel to each other penetrating through through holes provided in these plate-like fins. In the heat exchanger, an upright piece is formed on both sides of the opening edge of the insertion hole opposite to each other, and one upright piece is bent from the upright point toward the other upright side, and the tip thereof is upright. Characterized in that it is formed so as to be elastically deformable so as to be located outward from the point, and the upright piece and the flat heat exchange tube are in close contact with each other.

According to a fifth aspect of the present invention, there are provided a plurality of plate-like fins arranged at appropriate intervals, and a plurality of flat heat-exchange tubes which are parallel to each other and pass through insertion holes provided in these plate-like fins. In the heat exchanger, an upright piece is formed on both sides of the opening edge of the insertion hole opposite to each other, and one upright piece is bent from the upright point toward the other upright side, and the tip thereof is upright. The standing piece and the flat heat exchange tube are formed in such a manner that they can be elastically deformed so as to be located inward from the point, and a pressure is applied to the tip of the standing piece in the insertion direction of the flat heat exchange tube. And is in close contact with.

According to the first and fourth aspects of the present invention, the bent portion of the standing piece is deformed outward by pressing the tip of the bent standing piece in the direction of insertion of the flat heat exchange tube. In this state, the flat heat exchange tube is inserted into the insertion hole of the plate-shaped fin, and then the pressing force is released, whereby the upright piece and the flat heat exchange tube can be brought into close contact with each other. Therefore, the plate-like fin and the flat heat exchange tube can be easily brought into close contact with each other, and the heat exchange efficiency can be improved.

According to the second and fifth aspects of the present invention, after inserting the flat heat exchange tube into the insertion hole of the plate-like fin, the tip of the bent upright piece is moved in the insertion direction of the flat heat exchange tube. By pressing, the upright piece and the flat heat exchange tube can be brought into close contact with each other. Therefore, the plate-like fin and the flat heat exchange tube can be easily brought into close contact with each other, and the heat exchange efficiency can be improved.

According to the third aspect of the present invention, at least one of the plate-shaped fin and the flat heat exchange tube formed of an aluminum alloy member is provided on the surface of the plate-shaped fin and the flat heat exchange tube. By forming an aluminum alloy layer having a lower melting point than that of the first and then brazing the flat fin and the flat heat exchange tube, the flat heat exchange tube and the flat fin are in close contact with each other as described above. Therefore, brazing is easily performed, and the reliability of the brazed portion is improved.

In the method for manufacturing a heat exchanger,
To form an aluminum alloy layer, for example, Al-S
i, Al-Cu or Al-Cu-Si brazing filler metal powder;
The mixture comprising the flux powder and the binder is applied to the surface of the flat heat exchange tube made of aluminum or aluminum alloy, and is heated to a melting temperature of the brazing material or higher to form a brazing material alloy layer on the flat tube surface. .

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of a heat exchanger according to the present invention, FIG. 2 is a sectional perspective view showing an essential part thereof, FIG. 3 is a sectional view (a) showing an essential part thereof and an enlarged sectional view of an A part thereof. (B).

The heat exchanger has a plurality of plate-like fins 1 arranged at appropriate intervals and a plurality of parallel fins 1 passing through substantially flat elliptical insertion holes 2 provided in these plate-like fins 1. The flat heat exchange tube 3 and a pair of headers 4 and 5 which are arranged at intervals from each other and are formed of pipes communicating with the flat heat exchange tube 3 are integrally brazed. In this case, the flat heat exchange tube 3 has a plurality of passages 7 defined by a plurality of reinforcing walls 6. Note that one header 4
Is provided with an inlet 8 for the heat medium R, and the other header 5 is provided with an outlet 9.

In the heat exchanger constructed as described above, the headers 4 and 5 and the flat heat exchange tubes 3 are formed of an extruded aluminum alloy material, and the plate fins 1 are formed of an aluminum alloy plate material. Have been.

The plate-shaped fin 1 is provided with an insertion hole 2 for a flat heat exchange tube 3, and the flat elliptical insertion hole 2 has an opening edge opposite to the opening edge as shown in FIG. A pair of upstanding pieces 12 and 13 having different protruding dimensions are formed on both sides, more precisely, on the long side edges. This standing piece 12,
13, as shown in FIG. 3, one of the upright pieces 12 is bent from the upright point P toward the other upright piece 13.
2a and a tip portion 12b extending outward from the rising point P from the upper end of the bent portion 12a, and is formed in an elastically deformable bent shape. On the other hand, the other standing piece 13
Are bent substantially at right angles to the plate-like fin 1. In this case, the distance between the bent portion 12a of the upright piece 12 and the upright piece 13 is formed to be slightly smaller than the thickness of the flat heat exchange tube 3, and when the flat heat exchange tube 3 is inserted into the insertion hole 2, The tip 12b of the standing piece 12 is connected to the flat heat exchange tube 3
By pressing in the insertion direction, the bent portion 12a is deformed outward, so that the flat heat exchange tube 3 can be easily inserted.

To assemble the heat exchanger configured as described above, first, a plurality of, for example, 500 plate-like fins 1 are arranged at appropriate intervals between opposed jigs (not shown). Next, by moving the plate-like fins 1 in a direction approaching each other, a pressing force in the insertion direction of the flat heat exchange tube 3 is urged to the distal end portion 12b of the upright piece 12, and the bent portion 12a
Is deformed outward (see FIG. 5B). In this state, after the flat heat exchange tube 3 is inserted into the insertion hole 2 of the plate-like fin 1 and the pressing force urged to the tip of the standing piece 12 is released, the bending portion 12a It moves to the original position and comes into close contact with the surface of the flat heat exchange tube 3 as shown in FIG. Then, the plate-shaped fins 1 and the flat heat exchange tubes 3 and the headers 4 and 5 are integrally brazed by a method described later to form a heat exchanger.

In this case, as shown in FIG. 3B, an aluminum alloy layer 11 having a lower melting point than the flat heat exchange tube 3 and the plate-like fin 1 is formed on the surface of the flat heat exchange tube 3. The flat heat exchange tube 3 and the plate-like fin 1 are integrally brazed by contributing as a brazing material. Similarly, the flat heat exchange tube 3 and the headers 4 and 5 are integrally brazed.

Here, Al-Si, Al-Cu or A
A brazing material consisting of l-Cu-Si brazing material powder and a flux powder is applied to the surface of the flat heat exchange tube 3 and heated to a temperature equal to or higher than the melting temperature of the brazing material so that an aluminum alloy is formed on the extruded flat tube surface. The layer 11 is formed and the flat heat exchange tube 3
And the plate-like fin 1 are brazed.

In the above description, an aluminum alloy layer 11 having a lower melting point than the flat heat exchange tube 3 and the plate-like fin 1 is formed on the surface of the flat heat exchange tube 3 to contribute as a brazing material. However, a similar aluminum alloy layer 11 may be formed on the surface of the plate-like fin 1 instead of the flat heat exchange tube 3. Further, a similar aluminum alloy layer 11 may be formed on both the flat heat exchange tube 3 and the plate fin 1, and the flat heat exchange tube 3 and the plate fin 1 may be integrally brazed.

As described above, the bent upright piece 12 is formed.
By pressing the distal end portion 12b located outside of the rising point P in the insertion direction of the flat heat exchange tube 3, a clearance is formed between the insertion hole 2 of the plate-like fin, more precisely, between the rising pieces 12 and 13. The flat heat exchange tube 3 can be easily inserted into the insertion hole 2 of the plate-like fin 1.

After the flat heat exchange tube 3 is inserted, the pressing force of the distal end portion 12b of the upright piece 12 is released, so that the upright pieces 12, 13 of the plate-like fin 1 and the flat heat exchange tube 3 come into close contact with each other. I do. Accordingly, a heat exchanger of a normal form in which the flat heat exchange tubes 3 are orthogonal to the fins 1 is obtained, and the upright pieces 12 and 13 of the plate-like fins 1 and the flat surface portions of the flat heat exchange tubes 3 are in close contact with each other. By doing so, the thermal resistance can be reduced,
Heat exchange efficiency can be increased.

In order to further improve the heat exchange performance, the plate-like fin 1 and the flat heat exchange tube 3 can be metal-joined by brazing. In this case, since the flat heat exchange tube and the plate-like fin are in close contact with each other as described above, brazing is facilitated, and the reliability of the brazed portion is improved.

In the above-described embodiment, the upright piece 12 is formed by bending the upright piece 12 toward the other upright piece 13 and extending outward from the upright point P from the upper end of the upright piece 12a. By pressing the tip 12b of the upright piece 12 in the insertion direction of the flat heat exchange tube 3, the dimension between the upright pieces 12 and 13 is expanded, and the flat heat exchange tube 3 is Although the case of insertion has been described, by making the upstanding piece bent and formed as described below,
After inserting the flat heat exchange tube 3 into the insertion hole 2 of the plate-like fin 1, it is also possible to press the standing piece to make the plate-like fin 1 and the flat heat-exchange tube 3 adhere to each other. .

That is, as shown in FIG. 6, the upright piece 12A formed on one of two opposite sides of the opening edge of the insertion hole 2 of the plate-like fin 1 is moved from the upright point P of this upright piece 12A to the other. A bent portion 12c bent toward the standing piece 13 side;
A tip portion 12d extending from the upper end of the bent portion 12c to the inside of the standing point P is formed. In this case, the standing piece 12A
The distance between the bent portion 12c and the upright piece 13 is slightly larger than the thickness of the flat heat exchange tube 3. After the flat heat exchange tube 3 is inserted into the insertion hole 2, the tip of the upright piece 12A is formed. By pressing 12 d in the insertion direction of the flat heat exchange tube 3, the bent portion 12 c is deformed inward so as to be in close contact with the flat heat exchange tube 3.

With the above configuration, FIG.
As shown in FIG. 6A, after inserting the flat heat exchange tube 3 into the insertion hole 2 of the plate-like fin 1, as shown in FIG.
The bent portion 12c can be brought into close contact with the inner side, that is, the flat portion of the flat heat exchange tube 3 by pressing the tip portion 12d of the bent upstanding piece 12A in the insertion direction of the flat heat exchange tube 3. In this state, the plate-like fin 1 and the flat heat exchange tube 3 can be integrally brazed as described above.

[0030]

Next, the specific structure of the upright pieces 12 (12A) and 13 of the plate-like fin 1 and the flat heat exchange tube 3 of the heat exchanger of the present invention will be described with reference to FIGS. .

Example 1 Dimensions of plate-like fin 1: width 32 mm, length 491.5 m
m, thickness 0.1 mm Pitch of plate-like fins 1: 1.3 mm Number of plate-like fins 1: 590 Dimensions of opening of insertion hole 2: 2.1 mm Dimensions of upright pieces 12 and 13-Height of upright pieces 12 Dimensions: 1.3 mm Height of bent portion 12a of standing piece 12: 0.9 mm Height of bent piece 13: 0.9 mm Distance between bent portion 12a of rising piece 12 and raised piece 13:
1.93 mm Dimensions of flat heat exchange tube 3: width 18.8 mm, thickness 1.9
Number of the 3 mm flat heat exchange tubes 3: 50 The plate fins 1 and the flat heat exchange tubes 3 having the above dimensions are prepared.
The position of the tip 12b (point of force X) of the standing piece 12 as shown in FIG.
When the gap between the insertion hole 2 and the flat heat exchange tube 3 after compression and the brazing rate were examined, the results shown in Table 1 were obtained.

[0032]

[Table 1]

As a result of the above experiment, the gap between the plate-like fin 1 and the flat heat exchange tube 3 when the flat heat exchange tube 3 was inserted was 0.0
In the case of 2 mm, the brazing rate was 90%, and a certain effect was obtained. However, in order to minimize the deformation of the standing pieces 12 and 13 and to remarkably improve the brazing rate, the flatness with the insertion hole 2 was considered. It has been found that it is desirable to make the gap with the heat exchanger tube 3 0.03 mm or more. In addition, it was found that even if the force point position was 0.5 mm or more, only the amount of deformation at the position 12a (bent portion) increased, and the gap did not increase. Therefore, it is preferable that the force point position does not exceed 0.5 mm.

Example 2 The dimensions, pitch, number of sheets and the opening size of the plate-like fins 1 were the same as those in Example 1, and the dimensions (width, thickness) and the number of the flat heat exchange tubes 3 were as described above. A similar experiment was performed in the same manner as in Example 1 except that the dimensions of the standing pieces 12A and 13 were as follows.

The dimensions of the standing pieces 12A, 13 ・ The height of the standing piece 12A: 1.3 mm ・ The height of the bent portion 12c of the standing piece 12A: 0.9 mm ・ The height of the standing piece 13: 0.9mm Prepare the plate-like fin 1 and the flat heat exchange tube 3 having the above dimensions,
The tip 12d of the standing piece 12A as shown in FIG.
The position of the (point of force X), that is, the insertion dimension of the flat heat exchange tube 3 (the sum of the thickness of the flat heat exchange tube 3 and the gap) is appropriately changed.
When a pressing force (compression force) of 5.5 kgf was applied and the relationship between the insertion dimension and the brazing rate was examined, the results shown in Table 2 were obtained.

[0036]

[Table 2]

As a result of the above experiment, the insertion dimension was 1.97 mm.
(Gap 0.04 mm) and 1.94 mm (gap 0.01)
mm), buckling was observed in some of the plate-like fins 1. Therefore, the insertion hole 2 and the flat heat exchange pipe 3
It was found that it was better to set the gap to 0.02 to 0.03 mm, and it was preferable to set the gap to 0.03 mm in consideration of the brazing rate.

Example 3 As shown in FIG. 8B, the gap after compression was examined by changing the point of force and the compression force, and the results shown in Table 3 were obtained.

[0039]

[Table 3]

As a result of the above experiment, the position of the force point was -0.05 m.
m, the compression force is 11Kgf and the point of force is -0.17mm,
When the compressive force was 3 kgf, buckling was observed in some of the plate-like fins 1. Therefore, the point of force is -0.1 to
It was found that when the compression force was 0.15 mm and the compression force was 6 to 5 kgf, no buckling deformation occurred in the plate-like fin 1.

In addition, other than the above-described example, when the same experiment was performed by changing the dimensions of the flat heat exchange tube 3, similar results were obtained.

[0042]

As described above, according to the present invention,
The following excellent effects can be obtained.

(1) According to the first and fourth aspects of the present invention, the tip of the bent standing piece is pressed in the insertion direction of the flat heat exchange tube, so that the bent portion of the standing piece is outwardly moved. By inserting the flat heat exchange tube into the insertion hole of the plate fin in the state deformed to the side, and then releasing the pressing force,
The upright piece and the flat heat exchange tube can be brought into close contact with each other.
Therefore, the plate-like fin and the flat heat exchange tube can be easily brought into close contact with each other, and the heat exchange efficiency can be improved.

(2) According to the second and fifth aspects of the present invention, after the flat heat exchange tube is inserted into the insertion hole of the plate-like fin, the tip of the bent upright piece is inserted into the flat heat exchange tube. By pressing in the insertion direction, the upright piece and the flat heat exchange tube can be brought into close contact with each other. Therefore, the plate-like fin and the flat heat exchange tube can be easily brought into close contact with each other, and the heat exchange efficiency can be improved.

(3) According to the third aspect of the present invention, at least one of the plate-shaped fin and the flat heat exchange tube formed of the aluminum alloy member is provided with the plate-shaped fin and the flat heat exchange tube. By forming an aluminum alloy layer with a lower melting point than the heat exchange tube and brazing the plate-like fin and the flat heat exchange tube, the flat heat exchange tube and the plate-like fin adhere as described above. Therefore, brazing can be easily performed, and the reliability of the brazed portion can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a heat exchanger of the present invention.

FIG. 2 is a sectional perspective view of a main part of the heat exchanger of FIG.

3A is a sectional view showing a main part of FIG. 1 and FIG.
It is a part enlarged sectional view (b).

FIG. 4 is a perspective view showing a standing piece provided in an insertion hole of a plate-like fin according to the present invention.

FIG. 5 is a schematic sectional view showing a plate-like fin before insertion of the flat heat exchange tube according to the first embodiment of the present invention (a).
Sectional view (b) showing the inserted state of the flat and heat exchange tubes
It is.

FIG. 6 is a schematic sectional view showing a plate-like fin before insertion of a flat heat exchange tube according to a second embodiment of the present invention (a).
Sectional view (b) showing the inserted state of the flat and heat exchange tubes
It is.

FIG. 7 is a schematic diagram showing specific shapes and dimensions of the plate-like fin, the insertion hole, the upright piece, and the flat heat exchange tube according to the present invention. It is the schematic sectional drawing (b) which shows the shape and dimension of an upright piece, the schematic sectional view (c) which shows the power point position of an upright piece, and the schematic sectional view (d) which shows the dimension of a flat heat exchange tube.

8A and 8B are a schematic cross-sectional view showing a modified example of a standing piece of an insertion hole of a plate-like fin and a schematic cross-sectional view showing a position of a point of force of the standing piece.

FIG. 9 is a perspective view of a conventional heat exchanger.

FIG. 10 is a cross-sectional view showing a main part of a conventional heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate-shaped fin 2 Insertion hole 3 Flat heat exchange tube 11 Aluminum alloy layer 12, 12A Bent upright piece 12a Bent part 12b Tip part 12c Bent part 12d Tip part

Continued on the front page (72) Inventor Takayoshi Nishizawa 20-1 Shimoda-cho, Sakai-shi, Osaka Inside Nippon Light Metal Co., Ltd. Osaka Factory (72) Inventor Etsuro Kubota 161 Kambara, Kambara-cho, Abara-gun, Shizuoka Prefecture Nippon Light Metal Co., Ltd. In the product factory

Claims (5)

[Claims] 1. A heat exchanger comprising: a plurality of plate-like fins arranged at appropriate intervals; and a plurality of parallel flat heat-exchange tubes penetrating through insertion holes provided in these plate-like fins. In manufacturing, forming upright pieces on two opposite sides of the opening edge of the insertion hole,
In addition, one of the upright pieces is bent from the upright point toward the other upright piece side, and the tip thereof is formed so as to be positioned outward from the upright point, and the tip of the bent upright piece is formed. The flat heat exchange tube is inserted in the insertion hole of the plate-like fin with the bent portion deformed outward by pressing in the insertion direction of the flat heat exchange tube, and then the pressing force is released to raise the flat heat exchange tube. A method for manufacturing a heat exchanger, wherein a piece and a flat heat exchange tube are brought into close contact with each other. 2. A heat exchanger comprising: a plurality of plate-like fins arranged at appropriate intervals; and a plurality of parallel flat heat-exchange tubes penetrating through insertion holes provided in these plate-like fins. In manufacturing, forming upright pieces on two opposite sides of the opening edge of the insertion hole,
In addition, one of the upright pieces is bent from the upright point toward the other upright piece, and the tip is bent so as to be located inward of the upright point. After inserting the flat heat exchange tube, by pressing the tip of the bent formed upright piece in the insertion direction of the flat heat exchange tube, the upright piece and the flat heat exchange tube are brought into close contact with each other, A method for producing a heat exchanger. 3. The method for manufacturing a heat exchanger according to claim 1, wherein the plate-shaped fins and the flat heat exchange tubes are formed of an aluminum alloy member. Forming an aluminum alloy layer having a lower melting point than the plate-shaped fins and the flat heat exchange tubes on at least one of the surfaces, and brazing the plate-shaped fins and the flat heat exchange tubes. Characteristic method of manufacturing a heat exchanger. 4. A heat exchanger comprising: a plurality of plate-like fins arranged at appropriate intervals; and a plurality of parallel flat heat-exchange tubes penetrating through insertion holes provided in these plate-like fins. In the above, while forming upright pieces on both sides opposite the opening edge of the insertion hole, one of the upright pieces is bent from the upright point toward the other upright side, and the tip thereof is located outward from the upright point. A heat exchanger, which is formed so as to be elastically deformable so as to be positioned, and which has an upright piece and the flat heat exchange tube in close contact with each other. 5. A heat exchanger comprising: a plurality of plate-like fins arranged at appropriate intervals; and a plurality of parallel flat heat-exchange tubes penetrating through insertion holes provided in these plate-like fins. In the above, while forming upright pieces on both sides opposite the opening edge of the insertion hole, one upright piece is bent from the upright point toward the other upright side, and the tip is inward from the upright point. It is formed to be elastically deformable so as to be positioned, and the upright piece and the flat heat exchange pipe are brought into close contact with each other in a state where a pressing force is urged to the tip of the upright piece in the insertion direction of the flat heat exchange pipe. A heat exchanger.