JPH11294990A - Juxtaposed integrated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a juxtaposed integrated heat exchanger comprising a plurality of heat exchangers being coupled while facing the heat exchanging parts each other and having fins formed integrally between adjacent heat exchangers in which corrosion of tube or dissolution of fin is eliminated at the joint of fin and tube by preventing a brazing material from being used excessively thereat. SOLUTION: Presence of brazing material is equalized between a condenser and a radiator on the outer surface of a tube and presence of brazing material on the surface of fins 4 is reversed from that on the tube. More specifically, the fin 4 employs a bare material when the outer surface of tubes 3, 7 at the condenser and radiator is clad with brazing materials 32, 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger in which a plurality of heat exchangers are arranged one behind the other in the direction of air flow, and adjacent heat exchangers are connected to each other with their heat exchange portions facing each other and fins are integrally formed. And a side-by-side integrated heat exchanger.

[0002]

2. Description of the Related Art In recent years, there has been a demand for integrating a plurality of heat exchangers (for example, a condenser and a radiator) for different purposes due to restrictions on the space in a vehicle. As an example of such an integrated heat exchanger, for example, configurations as disclosed in Japanese Utility Model Laid-Open No. 2-14582 and Japanese Utility Model Publication No. 6-45155 are known.

[0003] In these, a first heat exchanger and a second heat exchanger are arranged in parallel, and a space between tubes constituting the first heat exchanger and between tubes constituting the second heat exchanger is provided. The fins are installed and the fins are integrally formed so that the fins can be shared by both heat exchangers.

[0004]

However, in the above heat exchanger, the tube of one of the heat exchangers is made of a bare material in which the brazing material is not clad, and the tube of the other heat exchanger is made of the brazing material. When the fin is formed of a clad material, since the fins are integrally formed by both heat exchangers, the fins have to be formed of the clad material. Inconvenience has been pointed out.

[0005] That is, in one heat exchanger in which the tube is made of a bare material, the brazing material clad on the fin ensures proper brazing between the fin and the tube, but the tube is made of a clad material. In the other configured heat exchanger, the brazing material at the joint between the fin and the tube becomes excessive, and the diffusion of the brazing material into the tube core material (erosion) due to silicon contained in the brazing material. Therefore, there are inconveniences such as deterioration of corrosion resistance and melting of the fin.

Therefore, in the present invention, when the fins are commonly used for adjacent heat exchangers in the side-by-side integrated heat exchanger, an excessive amount of brazing material at the joint between the fin and the tube is prevented, and It is an object of the present invention to provide a side-by-side integrated heat exchanger that minimizes inconveniences such as erosion of tubes and dissolution of fins.

[0007]

Means for Solving the Problems In order to achieve the above-mentioned object, a parallel-integrated heat exchanger according to the present invention comprises a fin and a plurality of tubes stacked via the fin to form a heat exchange section. Comprising a plurality of heat exchangers comprising a tank provided in the stacking direction of the plurality of tubes and communicating with each of the tubes, and adjacent heat exchangers face each of the heat exchange portions to each other. Side-by-side integrated heat exchanger wherein the fins are integrally formed with a common member, and the presence or absence of the brazing material in the outer surface of the tube is the same in the adjacent heat exchangers, The presence or absence of the brazing material on the surface of the tube is inversely related to the presence or absence of the brazing material of the tube (claim 1).

Here, the relation between the presence or absence of the brazing filler metal on the surface of the fin and the presence or absence of the brazing filler metal of the tube is defined as follows. When the fins are made of a clad material, the fins are made of a clad material with a brazing material clad, and conversely, the tubes of adjacent heat exchangers are made of a clad material with a brazing material clad on the outer surface. Means that the fin is made of a bare material (claim 2).

At this time, the tube of at least one of the heat exchangers may be formed from one sheet of material.
You may make it form by laminating | stacking two plate materials (claim 3 and 4).

Therefore, with the above-described configuration,
Even when fins are formed integrally with adjacent heat exchangers,
The brazing material does not become excessive at any part where the fin and the tube are joined, and an appropriate joint state is obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, a parallel-integrated heat exchanger 1 is obtained by integrally connecting a condenser 5 and a radiator 9, and is entirely made of an aluminum alloy.
The condenser 5 has a pair of tanks 2 a and 2 b, a plurality of flat tubes 3 communicating with the pair of tanks 2 a and 2 b, and a corrugated fin 4 inserted and joined between the tubes 3. It is configured. The radiator 9 includes a pair of tanks 6a and 6b formed separately from the condenser tank, and a plurality of flat tubes communicated with the pair of tanks and formed separately from the condenser tube. 7 and fins 4 integrated with the fins of the condenser 5 and inserted and joined between the tubes 7.

Each of the heat exchangers 5 and 9 comprises a plurality of tubes 3 and 7 and fins 4 to constitute a heat exchange section for exchanging heat between the fluid flowing through the tubes and the air passing between the fins. In this case, the respective heat exchanging sections are assembled integrally in a state where they face each other.

The interior of the tube 3 of the condenser 5 is partitioned by a large number of partition walls 3a to increase the strength.
It is constituted by one plate as described later.
The tanks 2a and 2b of the condenser 5 are configured by closing both end openings of a cylindrical tubular member 10 with lids 11, and a plurality of tube insertions for inserting the tubes 3 into the peripheral wall of the cylindrical member 10. A hole 12 is formed, and a partition wall 15 is formed inside.
a, 15b, 15c to define a plurality of flow chambers. An inlet 13 through which the refrigerant flows is provided at a portion of the tank constituting the most upstream flow path chamber, and an outlet 14 at which the refrigerant flows out is provided at a portion of the tank constituting the most downstream flow chamber. Is provided.

In the configuration example shown in FIG. 1, one tank 2a is divided into three flow passage chambers by two partition walls 15a and 15b, and the other tank 2b is defined by one partition wall 15c. One of the tanks 2a is provided with an inlet portion 13 and an outlet portion 14, and the refrigerant entering from the inlet portion 13 is reciprocated twice between the tanks and flows out from the outlet portion 14. It has become.

On the other hand, the tube 7 of the radiator 9
Uses an electric resistance welded pipe whose interior is not partitioned.
The tanks 6a and 6b of the radiator 9 are
A first tank member 16 having a U-shaped cross section in which a tube insertion hole for inserting the first tank member 16 is formed, and a peripheral wall of the tank 6 is provided between the first tank member 16 and the first tank member 16. A cylindrical body having a rectangular cross section is formed by the second tank member 17 to be formed, and both ends of the cylindrical body are closed by closing plates 18.

The closing plate 18 is formed of a flat plate formed in a rectangular shape in accordance with the cross-sectional shape of the tank, and has projections formed on two opposing sides.
And fitted to the opening of the tubular body by fitting into a fitting hole 19 formed in the tank member 17. Further, the joint portion between the first tank member 16 and the second tank member 17 is located at a position away from the portion joined to the tube 7 and is located outside the portion of the condenser 5 facing the tank 2. .

One of the tanks 6b of the radiator 9 is provided with an inlet 26 into which a fluid flows, and the other tank 6a
Is provided with an outlet portion 27 through which a fluid flows out. In this example, the inside of both tanks 6a and 6b is not partitioned, and the fluid entering from the inlet portion 26 is supplied to one of the tanks 6a and 6b.
b to the other tank 6 a via the entire tube 7, and then flows out of the outlet 27.

Further, the side plates 20 are brazed to the outside of the laminated tubes 3 and 7 (the upper and lower ends of the heat exchange portion in FIG. 1) via the fins 4, and the condenser 5 and the radiator 9 are connected to each other. They are integrally connected with the side plate 20. The side plate 20 is formed, for example, with a single plate shared by both heat exchangers, and has a ventilation hole 21 formed on a surface thereof at a position facing between the condenser 5 and the radiator 9.

At least one ventilation hole 21 is formed as a long hole extending in the longitudinal direction of the side plate 20.
A relatively high temperature air stagnates between the condenser 5 disposed on the upstream side and the radiator 9 disposed on the downstream side at a low wind speed when the condenser 5 and the radiator 9 communicate with the outside. This is provided to prevent the heat radiation effect of the radiator 9 from being reduced, and to guide the relatively low-temperature air flowing in through the ventilation holes 21 directly to the radiator 9, thereby promoting the heat radiation effect of the radiator 9.

Further, as shown in FIG. 1 (b), the side plate 20 is separated from the tanks 2a and 2b by a predetermined distance on the condenser side without joining to the tanks 2a and 2b, and becomes the tanks 6a and 6b on the radiator side. Is attached. The joining of the side plate 20 and the tanks 6a and 6b is achieved by forming the end of the side plate 20 on the first tank member 16 even if both ends of the side plate 20 are soldered to the surface of the first tank member 16. It may be inserted into the inserted insertion hole and brazed.

In this example, the condenser 5 and the radiator 9
Are integrally connected by a side plate 20 and a fin 4 integrally formed by both heat exchangers, and the tanks 2a and 2b of the condenser 5 and the tanks 6a and 6b of the radiator 9 are separated from each other. It is assembled.

The fin 4 has a bent top 4a.
And a flat portion 4b formed between the tops is formed continuously along the longitudinal direction of the tube, and a louver 30 is formed on the flat portions 4b and 8b, so that the whole is not clad with brazing material. It is composed of materials. On the other hand, as shown in FIG. 4, the tube 3 of the condenser 5 and the tube 7 of the radiator 9 are made of a clad material in which brazing materials 32 and 34 are clad at least on the outer surface.

More specifically, the tube 7 of the radiator 9 is made of a clad material in which only the outer surface of a core material 31 is clad with a brazing material 32, and the tube 3 of the condenser 5 is made of a core material. The brazing material 34 is clad not only on the outer surface of the material 33 but also on the inner surface thereof. As the tube of the radiator 9, a brazing material 32 may be clad on the outer surface of the core material 31, and a sacrificial corrosion layer (not shown) may be clad on the inner surface of the core material 31 to provide a sacrificial corrosion layer.

As an example of the material, in the tube 7 of the radiator 9, it is preferable to use, for example, a 3003 series aluminum alloy as a core material and a 4000 series aluminum alloy (eg, 4343) as a brazing material. Also,
Even in the tube 3 of the capacitor 5, for example, a 3003-series aluminum alloy is used as a core material, and a 4000-series aluminum alloy (for example, 434) is used as a brazing material on both surfaces.
3) may be used. When a sacrificial corrosion layer is provided on the inner surface of the tube of the radiator 9, 1
A 000 series (eg, 1100) or 7000 series (eg, 7072) aluminum alloy may be used.

The tube 3 of the capacitor 5 is formed by roll forming or press forming, and a brazing sheet 38 having a brazing material clad on both sides is provided with a brazing sheet 38 as shown in FIG.
As shown in (b), the brazing sheet is folded in two around its longitudinal direction, and the joining margins 35 formed on both side edges of the brazing sheet are overlapped to form a flat shape. Band-shaped beads 36 protruding inward are formed on the flat portions facing each other, and the beads 36 constitute partition walls 3a that divide the inside of the tube into a number of flow paths. Each bead 36
Are protruded to the extent that they come into contact with the inner surface of the opposing flat portion when the brazing sheet is folded in two. Such a tube is formed, for example, in JP-A-9-32313.
No. 4, Japanese Patent Application Laid-Open No. 9-329397, roll forming, and press forming in which each processing step is performed with a press.

In particular, in this example, the belt-shaped bead 36 is crushed in the width direction of the tube 3 so that the surface of the tube 3 becomes flat, and only the streak 37 remains on the surface of the tube 3.

In the above-described configuration, in order to assemble the side-by-side integrated heat exchanger, the first tank member 16 and the second tank member 17 are assembled, and at the same time, the closing plate 18 is assembled to form the tank of the radiator 9. 6a and 6b are formed. The condenser 5 and the radiator 9 are connected to a pair of tanks 2.
a, 2b, 6a, 6b, insert the tubes 3, 7 and assemble the integrated fins 4 between the tubes,
The side plate 20 is attached to the outside of the laminated tubes 3 and 7 via the fins 4.

The assembled heat exchangers 5, 9 are arranged such that their heat exchange portions face each other in parallel, and the tanks 2a, 2b of the condenser 5 and the tanks 6a, 6b of the radiator 9 are connected to a tube 3 , 7 are arranged side by side so as to be separated from each other so as to be arranged side by side, and fixed by a jig so as to maintain this state. Thereafter, if the whole is brazed in a furnace, the condenser 5 and the radiator 9 are integrally connected via the side plate 20 and the fin 4.

At this time, the fin 4 is made of a bare material, and the condenser 3 and the tubes 3 and 7 of the radiator 9 are
The fins 4 inserted between the tubes are joined to the tubes 3 and 7 only by the brazing materials 32 and 34 on the outer surface of the tube, because the brazing material is formed by cladding the brazing materials 32 and 34 on the outer surface.

The brazing materials 32 and 34 clad on the outer surfaces of the tubes 3 and 7 are provided with fins 4 to be joined to the tubes.
Even if is a bare material, the cladding ratio and the like are adjusted so that a necessary and sufficient brazing material is secured in the joining portion. For this reason, if the fins 4 are formed of the cladding material, There is a disadvantage that the brazing material becomes excessive. However, in this configuration, the brazing filler metals 32 and 34 are provided on the outer surfaces of the tubes of the condenser 5 and the radiator 9.
Is clad and the fins 4 are made of bare material, so there is no inconvenience that the brazing material is
Assured brazing can be ensured, and the possibility of erosion of the tube and dissolution of the fins can be almost eliminated.

The tube 3 of the condenser 5 is not limited to the above-mentioned structure, but may have the structure shown in FIG. That is, although the tube 3 of the condenser 5 is formed by folding a single plate into two, as shown in FIG. 5 (a), two tubes having a brazing material clad on both surfaces are formed. 5 (b), the brazing sheets 39, 40 of FIG. 5 are overlapped with each other by abutting brazing margins 41 formed on the side edges to form the same beads 36 on the respective brazing sheets 39, 40. 3), one brazing sheet 38 having both surfaces clad with brazing material is bent in the longitudinal direction as in FIG. 3 (b) to form a flat shape, and inwardly facing flat portions facing each other. A protruding strip-shaped bead 42 is formed, and the amount of protrusion of each bead 42 is shown in FIG.
Of each of the opposing beads 42
May be formed to form a partition wall 3b that partitions the inside of the tube. Further, as shown in FIG. 5C, two brazing sheets 39 and 40 each having a brazing material clad on both sides are overlapped with a brazing margin 41 formed on a side edge of the brazing sheets 41 and 40. A bead 42 similar to that shown in FIG. 5B may be formed, and the partition 3b may be formed by abutting the beads.

The tube 3 of the condenser 5 described above may be further configured as shown in FIGS.
Hereinafter, the tube 3 shown in FIG. 6 will be described in brief so that the beads 36 and 42 of each tube shown in FIGS. It is processed.

That is, the structure shown in FIG. 6A is a single brazing sheet 3 in which brazing material is clad on both sides.
8 is formed into a flat shape by forming a groove 43 on the tube surface.
Each bead 44 is formed in a wide band shape so that the bead 44 is formed, and this bead 44 is configured to be in contact with the inner surface of the opposed flat portion.

The structure shown in FIG. 6B is composed of two brazing sheets 3 with brazing material clad on both sides.
6A is different from the configuration of FIG. 6A only in that a tube is formed by superimposing 9, 40.
The configuration shown in (c) is formed by bending a brazing sheet 38 having a brazing material clad on both sides, and formed by abutting beads 45 formed on both flat portions. The configuration shown in FIG. 6D is different from the configuration shown in FIG. 6C in that the brazing sheet 39, 40 having the brazing material clad on both sides thereof is overlapped to form a tube. It is only different from the configuration.

In such a configuration, the joint area between the bead 44 and the inner surface of the tube 3 or between the beads 45 can be increased, so that the strength and pressure resistance of the tube itself can be increased.

The tube 3 shown in FIG. 7 and FIG.
The bead formed continuously as shown in FIG. 6 is divided into a plurality of long beads having a predetermined length.
In the configuration shown in FIG. 7A, a brazing sheet 38 having a brazing material clad on both sides is bent to form a flat shape, a long bead 46 is formed on a flat portion of the tube, and the long bead 45 is opposed to the long bead 45. As shown in FIG. 7 (b), the bead formed on one flat portion is different from the bead formed on the other flat portion and the length of the tube. It is formed by shifting the position in the direction.

The structure shown in FIG. 8A is composed of two brazing sheets 39 and 4 having brazing materials clad on both sides.
7A only differs from the configuration of FIG. 7A in that they are formed by superimposing 0 on each other, and the configuration shown in FIG. Although the sheet 38 is bent and formed into a flat shape, the protrusion amount of the long beads 47 formed on both flat portions is set to about half of that of the long beads in FIG. Is formed. The configuration shown in FIG. 8 (c) is different from the configuration of FIG. 8 (b) only in that two brazing sheets 39 and 40 each having a brazing material clad on both sides are formed by overlapping. It has become. In the configurations of FIGS. 8B and 8C, the long beads formed on any of the flat portions are formed so that the positions in the longitudinal direction of the tube are aligned.

Further, the tube 3 shown in FIGS.
In FIG. 9A, a bottomed cylindrical bead (round bead) is formed in place of the long beads 46 and 47 shown in FIGS. 7 and 8, and the structure shown in FIG. Is formed by bending a single brazing sheet 38 clad on both sides into a flat shape, and a round bead 4
8 and the round bead 48 is configured to be in contact with the inner surface of the opposed flat portion. As shown in FIG. 9B, the bead formed on one flat portion is formed on the other flat portion. The bead formed on the flat portion and the tube are shifted from each other in the longitudinal direction.

The structure shown in FIG. 10 (a) has two brazing sheets 39, brazing material clad on both sides.
FIG. 9 (a) shows that 40 are superposed.
The configuration shown in FIG. 10B differs from that of FIG. 10B only in that the brazing material is formed in a flat shape by bending a single brazing sheet 38 clad on both sides. The projecting amount of the round beads 49 formed on the flat portion is set to about half of that of the round beads 48 in FIG. 7A, and the round beads 49 are formed so as to abut each other. FIG.
The configuration shown in FIG. 10C is different from the configuration shown in FIG. 10B only in that two brazing sheets 39 and 40 each having a brazing material clad on both sides are formed by overlapping. . In the configurations of FIGS. 10B and 10C, the round beads formed on any of the flat portions are formed so that the positions in the longitudinal direction of the tube are aligned.

FIG. 11 shows still another example of a tube. In the configuration of FIG.
One brazing sheet 3 clad on both sides of 3
8 is bent around the longitudinal direction, brazing margins 35 formed on the side edges are overlapped to form a flat shape, and an inner fin 50 made of a bare material is inserted into the tube 3. Also in this case, the brazing sheet constituting the tube main body has a core material of 30% as in the above embodiment.
Using a 0.3 series aluminum alloy, 400
It is preferable to use a zero-based aluminum alloy (for example, 4343). In addition, as the inner fin 50, 3000
It is preferable to use a system aluminum alloy.

In such a configuration, the brazing allowance 35 is joined to each other by the brazing material 34 on the inner surface of the tube, and the inner fin 50 is brazed to the inner surface of the tube. As before, the tube and the fin are brazed.

In the configuration shown in FIG. 11B, an electric resistance welded tube in which a brazing material 32 is clad on the outer surface of a core material 31 is used, and an inner fin 5 in which a brazing material 51 is clad on both surfaces is used.
2 is inserted. In this configuration, a 3003 aluminum alloy is used as the core material of the tube 3 and the inner fin 53, and 4
It is preferable to use a 000 series aluminum alloy (for example, 4343). Even in such a configuration, the tube 3 and the inner fin 52 are brazed by the brazing material 51 clad on the fin surface, and the brazing material 3 on the outer surface of the tube is formed.
2, the tube and the fin are brazed in the same manner as described above.

FIG. 1 shows another example of a tube.
As shown in FIG. 1C, the tube 3 in which the brazing material 54 is clad on the surface of the extruded material 53 may be used. Such a tube 3 can be formed by simultaneously extruding the extruded material 53 and the brazing material 54 on the surface thereof, as shown in FIG.
Extruded material 53 is formed by normal extrusion molding,
The extruded material may be applied later by spraying a brazing material from a nozzle 55 arranged around the extruded material.

Regardless of the configuration of the tube 3 of the condenser 5, the outer surface of the tube 3 is connected to the radiator 9.
By adopting a configuration in which the brazing material is clad in the same manner as the tube 7, the joining with the fins 4 made of bare material can be appropriately performed, and an excessive amount of the brazing material at the joining portion can be prevented.

In the above configuration, the capacitor 5
In this example, the tubes 3 and 7 of the radiator 9 are made of a clad material and the fins 4 are made of a bare material. Conversely, the condenser 5 and the tubes 3 and 7 of the radiator 9 are made of a bare material and the fins 4 are made of a clad material. It may be configured. That is, the presence / absence of the brazing material on the outer surface of the tube may be the same for the adjacent heat exchangers, and the presence / absence of the brazing material on the surface of the fin may be inversely related to the presence / absence of the brazing material on the tube.

In the above description, the variation has been described centering on the tube 3 of the condenser 5. However, the tube 7 of the radiator 9 may have the same configuration. The configuration of the tube is not limited to the above-described configuration, and the above-described configuration may be modified and used as necessary.

[0047]

As described above, according to the present invention,
In a side-by-side integrated heat exchanger in which fins are integrally formed in adjacent heat exchangers, the presence or absence of a brazing material in the outer surface of the tube is the same in adjacent heat exchangers, and the surface of the fins has a brazing material. Since the presence or absence of the brazing material is inversely related to the presence or absence of the brazing material of the tube, the brazing material does not become excessive in any part where the fin and the tube are joined, and it is possible to secure an appropriate joining state. In addition, it is possible to prevent the tube from being damaged and the fins from being dissolved due to the diffusion of wax into the tube core material (erosion).

[Brief description of the drawings]

FIG. 1 is a view showing the overall configuration of a side-by-side integrated heat exchanger according to the present invention. FIG. 1 (a) is a front view thereof, and FIG. 1 (b) is a plan view thereof.

FIG. 2 is a perspective view of the side-by-side integrated heat exchanger according to FIG. 1;

FIG. 3 (a) is an enlarged perspective view showing tubes and fins of each heat exchanger of the side-by-side integrated heat exchanger according to the present invention. FIG. 3B is a perspective view showing a tube of the capacitor, and shows an example in which a tube is formed by one brazing sheet and a band-shaped bead is formed inside.

FIG. 4 is an enlarged view showing a relationship between fins and tubes of a condenser and a radiator.

FIG. 5 is a perspective view showing an example in which a strip-shaped bead is formed in a tube of a condenser, and FIG. 5 (a) shows an example formed by two brazing sheets;
(B) shows another example formed by one brazing sheet, and FIG. 5 (c) shows another example formed by two brazing sheets.

FIG. 6 (a) is a perspective view showing an example in which a wide band-shaped bead is formed on a tube of a condenser, and FIG.
6A shows an example formed by one brazing sheet, FIG. 6B shows an example formed by two brazing sheets, and FIG. 6C shows one brazing sheet. FIG. 6 shows another example formed by FIG.
(D) shows another example formed by two brazing sheets.

FIG. 7A is a perspective view showing a tube of a condenser, and shows an example in which a tube is formed by one brazing sheet and a long bead is formed therein. FIG.
FIG. 7B shows a plan view of FIG.

FIG. 8 is a perspective view showing an example in which a long bead is formed in a tube of a condenser, and FIG. 8 (a) shows an example formed by two brazing sheets;
(B) shows another example formed by one brazing sheet, and (c) of FIG. 8 shows another example formed by two brazing sheets.

FIG. 9 (a) is a perspective view showing a tube of a condenser, and shows an example in which a tube is formed by one brazing sheet and a round bead is formed inside. FIG.
FIG. 9B is a plan view of FIG.

FIG. 10 is a perspective view showing an example in which a round bead is formed in a tube of a condenser, and FIG. 10 (a) shows an example formed by two brazing sheets, and FIG. 10 (b) Shows another example formed by one brazing sheet, and FIG. 10C shows another example formed by two brazing sheets.

FIG. 11 shows another example of a condenser tube. FIG. 11A is a cross-sectional view showing a tube formed by inserting an inner fin into a tube formed of one brazing sheet. FIG. 11B is a cross-sectional view showing a tube formed by inserting an inner fin into an electric resistance welded tube, and FIG. 11C is a diagram in which a brazing material is clad on the outer surface of the extruded material. FIG. 11D is an explanatory view showing a step of spraying and applying a brazing material to the surface of the extruded material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Parallel integrated heat exchanger 2a, 2b, 6a, 6b Tank 3, 7 Tube 4 Fin 5 Condenser 9 Radiator 32, 34, 51, 54 Brazing filler metal

Claims (4)

[Claims] A fin and a plurality of tubes stacked via the fins constitute a heat exchange unit, and include a tank provided in a stacking direction of the plurality of tubes and communicating with each tube. A side-by-side integrated heat exchanger having a plurality of heat exchangers, wherein adjacent heat exchangers are coupled with the respective heat exchange portions facing each other, and each fin is integrally formed with a common member. In the exchanger, the presence / absence of the brazing material in the outer surface of the tube is made the same in the adjacent heat exchangers, and the presence / absence of the brazing material on the surface of the fin is inversely related to the presence / absence of the brazing material in the tube. Side-by-side integrated heat exchanger. 2. A fin and a plurality of tubes stacked via the fins constitute a heat exchange unit, and include a tank provided in a stacking direction of the plurality of tubes and communicating with each tube. A side-by-side integrated heat exchanger having a plurality of heat exchangers, wherein adjacent heat exchangers are coupled with the respective heat exchange portions facing each other, and each fin is integrally formed with a common member. In the exchanger, the fins may be formed of a bare material having no brazing material clad thereon, and the tubes of the first and second heat exchangers may be formed of a cladding material having at least an outer surface portion clad with a brazing material. A side-by-side integrated heat exchanger. 3. The side-by-side integrated heat exchanger according to claim 1, wherein the tube of at least one of the heat exchangers is formed from a single plate. 4. The side-by-side integrated heat exchanger according to claim 1, wherein the tube of at least one of the heat exchangers is formed by laminating two plates.