JP2002168587A - Method for manufacturing composite heat exchanger and composite heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a composite heat exchanger capable of integrally fixing by brazing via a prescribed space by easily assembling and without affecting a thermal influence when a radiator for an automobile is integrated with a condenser and the composite heat exchanger manufactured by the method. SOLUTION: A first heat exchanger 9 and a second heat exchanger 10 having a core in which many tubes, fins 2 are arrayed in parallel, both ends of the tubes communicate with a tank and a support material is disposed in an arraying direction of the tubes are individually independently assembled. The first support material 1 of the exchanger 9 is connected to the second support material 8 of the exchanger 10 by a connecting fitment 11 or a connecting protrusion 12 of the support material by caulking or press injecting or engaging. The entirety is introduced into a furnace, the components are simultaneously integrally brazed, and the exchanger 9 is connected to the exchanger 10 by brazing via the fitment 11 or the protrusion 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a composite heat exchanger in which a radiator for cooling engine cooling water for an automobile and a condenser for a car cooler are integrated, and a composite heat exchanger manufactured by the method. About the exchanger.

[0002]

2. Description of the Related Art Heretofore, a radiator and a condenser for an automobile have been produced separately and independently, and each finished product has been fastened and fixed by using an appropriate connection fitting to integrate the two. In addition, a device in which a radiator and a capacitor are integrated in a monoblock has been proposed. This is an example of arranging two rows of tubes, providing a common corrugated fin between each tube, arranging a tank for each tube row, using a tank and a tube row on the front side as a condenser, and those on the rear side as It was used as a radiator.

[0003]

A radiator and a capacitor which are produced separately and independently, and those finished products are integrated by connecting metal fittings, are troublesome in connection and unified between the two by loosening of fastening parts. There is a disadvantage that the property is lost. Next, in the case of integrating the condenser and the radiator in a monoblock manner and sharing the fins,
The radiator and the condenser have thermal effects on each other via the fins, and there is a possibility that the optimum design value of each heat exchanger cannot be secured. In addition, the fin pitch of the radiator fin and the fin pitch of the condenser fin must be made the same, and it is difficult to design each of them independently. Further, a dedicated line for manufacturing is required, and a conventional general-purpose line cannot be used as it is. Accordingly, the present invention provides an ideal composite heat exchanger in which a radiator and a condenser can be assembled separately and independently on a conventional general-purpose line, and both cores can be separated from each other and integrated and brazed. It is an object to provide a manufacturing method and a composite heat exchanger manufactured by the method.

[0004]

According to the present invention, a plurality of tubes (1) and fins (2) are arranged in parallel.
And a first core (3) and a second core (4) are formed,
Both ends of each tube (1) are communicated with a pair of first tanks (5) and a pair of second tanks (6), and the first core (3) thereof.
A pair of groove-shaped first support members (7) and second support members (8) are arranged on both ends of the second core (4) in the tube parallel direction with the opening sides facing outward, and the first heat Exchanger
(9) and the second heat exchanger (10) are separately assembled,
The first support material (7) and the second support material (8) are arranged in parallel and close to each other, and a connection fitting (11) or one of the support materials is provided between the two support materials (7) and (8). Connection protrusion (1
By means of caulking, press-fitting, or fitting into each other according to 2), spacer means for holding a certain gap between the first core (3) and the second core (4) are formed. In a state where the brazing material is previously coated or arranged between the components connected to each other, the whole is put into a furnace,
This is a method of manufacturing a composite heat exchanger in which components are integrally brazed and fixed.

According to a second aspect of the present invention, in the first aspect, the connection fitting (11) has a short groove shape and has a folded portion (13) having a U-shaped cross section formed on the outer surface of both side walls. A method of manufacturing a composite heat exchanger in which the folded portion (13) is fitted to the side wall of the support members (7), (8). According to a third aspect of the present invention, in the first aspect, the connection fitting (11) has a short groove shape, and both ends of the groove bottom protrude longer than the width of both side walls, and the protrusion (14) is formed. The first
Recesses in the side wall edges of the support part (7) and the second support (8)
(15) and / or a method of manufacturing a composite heat exchanger configured to be fitted to the projection (16). According to a fourth aspect of the present invention, in the first aspect, the first support member is provided.
(7) The width of at least one of the second support member (8) is larger than the width of its core, and the connection protruding portion (U-shaped folded portion) is formed on at least one edge of the support member. 12) is a method of manufacturing a composite heat exchanger in which the folded portion is fitted to the edge of the other support material.

According to a fifth aspect of the present invention, the first core is formed by a plurality of tubes (1) and fins (2) arranged in parallel.
(3) and the second core (4) are formed and the respective tubes
Both ends of (1) are communicated with a pair of first tanks (5) and a pair of second tanks (6), and the first core (3) and the second core
A pair of groove-shaped first support members (7) and second support members (8) are disposed at both ends in the tube parallel direction of (4) with their opening sides facing outward, and the first heat exchanger (9) is provided. ) And the second heat exchanger (10) are separately assembled, and the first support material (7) and the second support material (8) are closely arranged in parallel at right angles,
By fixing the two support members (7) and (8) to each other with the connection fitting (11) or the connecting protrusion (12) of one of the support members, or by press-fitting or fixing them,
Spacer means for holding a predetermined gap between the first core (3) and the second core (4) is formed, and a brazing material is previously coated or arranged between components connected to each other. This is a method for manufacturing a composite heat exchanger in which the whole is put in a furnace in a state where the components are assembled, and each part is integrally brazed and fixed.

According to a sixth aspect of the present invention, in the fifth aspect, the connection fitting (11) includes a horizontal U-shaped portion (17) formed by folding a plate material in a horizontal direction, and a horizontal U-shaped portion thereof. Shape
(17) and a vertical U-shaped part (18) folded back in a vertical direction perpendicular to the one edge part, and the vertical U-shaped part (18) is provided on the first support part (7). ), And a horizontal U-shaped part (17) is fitted to the side wall of the second support part (8).
According to a seventh aspect of the present invention, in the fifth aspect, the width of at least one of the first support material (7) and the second support material (8) is made larger than the width of the core, and At the longitudinal end of the support material, U
Forming a folded part (19) in the shape of a letter, and the folded part (19)
Is a method for manufacturing a composite heat exchanger in which the edge is fitted to the edge of the other support material.

According to the present invention, the first core is formed by a plurality of tubes (1) and fins (2) arranged in parallel.
(3) and the second core (4) are formed and the respective tubes
Both ends of (1) are communicated with a pair of first tanks (5) and a pair of second tanks (6), and the first core (3) and the second core
A pair of groove-shaped first support members (7) and second support members (8) are disposed at both ends in the tube parallel direction of (4) with their opening sides facing outward, and the first heat exchanger (9) is provided. ) And the second heat exchanger (10) are separately assembled, and the first support material (7) and the second support material (8) are closely arranged in parallel at right angles,
The tank of one of the heat exchangers is formed of a cylindrical body, and an end cover (20) is fitted to an end of the cylindrical body, and the end cover (20) is provided.
A locking portion (21) is protruded from an edge of the heat exchanger, and the locking portion (21) is fitted to the engaging portion (22) of the side wall portion of the support material of the other heat exchanger, thereby forming the second heat exchanger. One core (3) and second core (4)
Spacer means for holding a certain gap between them are formed, and the whole is put in a furnace in a state where the brazing material is previously coated or arranged between the parts connected to each other, and This is a method of manufacturing a composite heat exchanger in which parts are integrally brazed and fixed.

According to a ninth aspect of the present invention, there is provided a composite heat exchanger manufactured by the method according to any one of the first to eighth aspects.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an assembly explanatory view showing a first embodiment of the present invention, and shows a state before brazing. In the figure, a first heat exchanger 9 is used as a condenser for a car cooler, and a second heat exchanger 10 is used as a radiator for cooling engine cooling water. In each of the cross-flow type heat exchangers, a flat tube 1 and a corrugated fin 2 are arranged in parallel to form a first core 3.
And a second core 4. Both ends of each tube 1 are connected to a pair of first tanks 5 and a pair of second tanks 6. A pair of groove-shaped first support members 7 and second support members 8 are arranged at both ends of the first core 3 and the second core 4 in the tube parallel direction, with the opening sides facing outward.
The ends of the first support member 7 and the second support member 8 are
Each of the first tank 5 and the second tank 6 is inserted into a slit-shaped hole. In this way, the first heat exchanger 9 and the second heat exchanger 10 are separately assembled.

Next, the first support member 7 of the first heat exchanger 9 and the second support member 8 of the second heat exchanger 10 are fixed at their upper and lower ends by a plurality of connection fittings 11. The connection fitting 11 has a short groove shape, and has a folded portion 13 having a U-shaped cross section on the outer surface side of both side walls, and the folded portion 13 is formed as shown in the figure with the side wall of the first support member 7 and the second support. It is fitted and fixed to the side wall of the member 8. In this example, both ends of the upper first support member 7 and the second support member 8 in the longitudinal direction and both end portions of both lower support members (not shown) are fitted and fixed by connection fittings 11, respectively. At least, the interval between the second support member 8 and the first support member 7 is equal to the groove width of the connection fitting 11. Thereby, the first core 3
And the second core 4 can be positioned with a certain gap.

The first heat exchanger 9, the second heat exchanger 10,
Each of the connection fittings 11 is formed of, for example, aluminum or an alloy thereof, and at least one of the parts in contact with each other is coated with a brazing filler metal.
The assembly of the two heat exchangers in this manner is inserted into a high-temperature furnace, the brazing material is melted, and then cooled and solidified to integrally braze and fix the parts together. And the first heat exchanger 9 and the second heat exchanger
And 10 are simultaneously brazed and fixed via a connection fitting 11. As described above, the first heat exchanger 9 and the second heat exchanger 10 are assembled in a conventional general-purpose production line at the assembling stage, and both are assembled in parallel to each other by the connection fitting 11 into the composite heat exchanger. Then, both are simultaneously brazed simultaneously and as a combined body via the connection fitting 11.

Next, FIG. 2 shows a second embodiment of the present invention.
Only the shape of 11 and the locking portion of each support material with which it is engaged. The connection fitting 11 of this example has a short groove shape, both side walls of which form a spacer portion 24, and both ends of the groove bottom protrude from the spacer portion 24, one of which is bent and the other of which is formed in a straight line. Having. A slit-shaped hole 23 is provided on the bent side. A projection 16 is provided on the upper edge of the side wall of the first support member 7 so as to be aligned with the hole 23 and the projection 14 of the connection fitting 11, and a recess is provided on the side wall of the second support member 8. 15 are formed. Then, the hole 23 of the connection fitting 11 is fitted into the projection 16 of the first support member 7, and the projection 14 is fitted into the recess 15 of the second support member 8. At this time, the spacer portion 24 keeps the distance between the outer surface of the second support member 8 and the outer surface of the first support member 7 at a predetermined distance, and keeps the distance between the second core 4 and the first core 3 at a desired value. Is what you do. In this state, the components are brazed integrally to complete the composite heat exchanger.

Next, FIG. 3 shows another example of the connection fitting 11 shown in FIG. 2. In this example, the tips of the respective projecting portions 14 projecting from the groove bottom are bent and each of the projecting portions 14 is bent. A slit-shaped hole 23 is formed. Then, as shown in FIG. 4, the projections 16 are fitted into the holes 23 of the connection fitting 11, respectively. In this state, the components are brazed integrally to complete the composite heat exchanger. Next, FIGS. 5 and 6 show a fourth embodiment. This embodiment is different from the first embodiment in that a connection projection provided on a second support member 8 instead of the connection fitting 11 is provided. The part 12 connects the first heat exchanger 9 and the second heat exchanger 10. In this example, the widths of the first support member 7 and the second support member 8 are wider than those of the first heat exchanger 9 and the second heat exchanger 10, respectively, and the first support member 7 and the second support member 8 are caulked and fixed by the connecting protrusions 12. Thus, the distance between the first core 3 and the second core 4 is maintained at a predetermined distance. Although only the upper part of the heat exchanger is shown in FIG. 6, the lower part is formed symmetrically with this. In this state, the components are brazed integrally to complete the composite heat exchanger.

FIGS. 7 to 9 show another embodiment of the present invention. In this embodiment, the first heat exchanger 9 is of a cross flow type, and the second heat exchanger 10 is of a down flow type. Type. That is, in the first heat exchanger 9, a pair of first tanks 5 are arranged left and right apart from each other, and the refrigerant flows horizontally from one first tank 5 to the other first tank 5 via the tube 1. . In the second heat exchanger 10, the cooling water flows downward from the upper second tank 6 to the lower second tank 6 via the tube 1. Such two are shown in FIG.
The first support member 7 and the second support member 8 are connected via a connection fitting 11 shown in FIG. The connection fitting 11 is a horizontal U-shaped portion 17 formed by folding a plate material in a horizontal direction.
And a vertical U-shaped portion 18 that is folded from one edge of the horizontal U-shaped portion 17 in a vertical direction perpendicular to the one edge, and the vertical U-shaped portion 18 is a first support member. The horizontal U-shaped portion 17 is fitted to the side wall of the second support member 8.

In this example, the first support member 7 and the second support member 8 are joined at four corners (two corners are omitted). At the same time as the first heat exchanger 9 and the second heat exchanger 10 are brazed, the first and second heat exchangers 9 and 10 are brazed and joined via the connection fitting 11. In this example, as shown in FIG.
The width of the support member 7 is wider than the first heat exchanger 9, and the first support member 7 and the second support member 8 are connected via the connection fitting 11, so that the distance between the respective cores is predetermined. Is what we keep.

Next, FIGS. 10 to 11 show still another embodiment of the present invention, in which the first heat exchanger 9 is a cross-flow type and the second heat exchanger 10 is a down-flow type. It is. In this example, the end of the side wall of the second support member 8 forms a folded portion 19 that is folded in a U-shape, and the folded portion 19 is fixed to one side wall of the first support member 7 by caulking. Things. Also in this example, the width of the first support member 7 is made wider than that of the first tank 5, and the gap between both cores is maintained at a predetermined distance. In this state, the components are brazed integrally to complete the composite heat exchanger.

Next, FIGS. 12 and 13 show still another embodiment of the present invention, in which the first heat exchanger 9 is a cross-flow type and the second heat exchanger 10 is a down-flow type. It is. In this example, a cylindrical pipe is used for the pair of first tanks 5 of the first heat exchanger 9, and both end openings are closed by end covers 20. An L-shaped protrusion is formed at the edge of the end cover 20, and a locking portion 21 is further provided at the rising portion. A recess is formed in one side wall of the second support member 8 so as to align with the locking portion 21.
An engagement portion 22 composed of 15 is provided. Then, the end cover 20 is fitted to the first tank 5, and the locking portion 21 is engaged with the engaging portion.
By engaging with the core 22, the spacing between the cores is maintained at a predetermined position as shown in FIG. In this state, the components are brazed integrally to complete the composite heat exchanger.

[0019]

According to the first aspect of the present invention, there is provided the first aspect of the present invention.
The heat exchanger 9 and the second heat exchanger 10 are separately assembled, and the first support material 7 and the second support material 8 are closely and juxtaposed in parallel, and the first support material 7 and the second support material The first and second cores 3 and 4 are held at a constant distance by fitting each other between the first and second cores 3 and 4 by the connection fitting 11 or the connection protrusion 12 of one of the support members. A spacer means is formed. In this state, since the whole is integrally brazed and fixed in the furnace, the first heat exchanger 9 and the second heat exchanger 10 are easy to handle without thermally affecting each other. An integrated hybrid heat exchanger can be manufactured. That is, the first heat exchanger 9
At the same time as brazing between itself and each part of the second heat exchanger 10 itself, an integral connection between the two heat exchangers can be made in the furnace, and a high productivity composite heat exchanger can be obtained. Become.

Further, the first heat exchanger 9, the second heat exchanger
The 10 can be designed according to each use without being thermally affected by others, and can be assembled with each general-purpose line. Then, after assembly is completed, it is sufficient to hold them at a predetermined interval by a spacer means, and from this point, a composite heat exchanger having productivity and optimum conditions for each heat exchanger can be produced. That is, the tank shape and fin pitch of each heat exchanger can be set under unique conditions.

According to the second aspect of the present invention, the connection fitting 11 has a short groove shape, and has a folded portion 13 having a U-shaped cross section formed on the outer surface side of both side walls thereof.
8, the connection between the first heat exchanger 9 and the second heat exchanger 10 is extremely easy, and a predetermined gap is maintained between the two cores. can do. According to the third aspect of the present invention, the connection fitting 11 has a short groove shape, and both ends of the groove bottom protrude longer than the width of both side walls, and the protrusion 14 is formed by the first support member 7 and the second support member 8. It is configured to be fitted to the concave portion 15 and / or the convex portion 16 on the side wall edge of the heat exchanger, so that it is easy to mount and the positioning state between the two heat exchangers can be accurately maintained.

According to a fourth aspect of the present invention, at least one of the first support member 7 and the second support member 8 has a width larger than the core width, and at least one of the support members has a U-shaped edge. Connecting projection 12 consisting of a folded part
Is formed, and the folded portion is fitted to the edge of the other support material. Therefore, the spacer means is integrated with the one support material itself, and a production method with good productivity can be provided.

According to the fifth aspect of the present invention, the first heat exchanger 9 and the second heat exchanger 10 are separately assembled, and the first support member 7 and the second support member 8 are orthogonal to each other. The first support member 7 and the second support member 8 are caulked or press-fitted or fixed to each other by the connection fitting 11 or the connection protruding portion 12 of one of the support materials, or are fitted into the first support material 7 and the second support material 8. A spacer means for holding the first core 3 and the second core 4 at a predetermined interval is formed, and then the parts are integrally brazed and fixed in the furnace in this state. . Therefore, even in the case where the first tank 5 of the first heat exchanger 9 and the second tank 6 of the second heat exchanger 10 are arranged in a direction orthogonal to each other, no thermal influence is exerted between the two. The integrated composite heat exchanger can be easily manufactured by using the production method and the production line.

According to a sixth aspect of the present invention, the connection fitting 11 has a horizontal U-shaped portion 17 and a vertical U-shaped portion 18, and the vertical U-shaped portion 18 is provided on the first support member 7. Since the horizontal U-shaped portions 17 are respectively fitted to the second support members 8, it is possible to provide a method of manufacturing a composite heat exchanger which is easy to attach and has high productivity. According to the present invention described in claim 7, at least one of the first support member 7 and the second support member 8 has a width larger than the width of the core, and at least one of the support members has a longitudinal end portion. Since the U-shaped folded portion 19 is formed on the side wall portion and the folded portion 19 is fitted to the edge of the other support material, the connecting means, the spacer means, and the support material of both are also used, A manufacturing method which is easy to assemble and excellent in mass productivity can be provided.

According to the present invention, the tank of one of the heat exchangers is formed of a cylindrical body, and the end cover 20 is fitted to the end of the tank, and the tank is engaged with the edge of the end cover 20. The spacer 21 is formed by projecting, and the locking part 21 is fitted to the engaging part 22 of the side wall part of the support material of the other heat exchanger to form a spacer means for holding the both. Therefore, it is possible to provide a method of manufacturing a composite heat exchanger having a small number of parts and easy assembly. The present invention described in claim 9 is a composite heat exchanger manufactured by any one of the above manufacturing methods, so that it is possible to provide an inexpensive one with high mass productivity.

[Brief description of the drawings]

FIG. 1 is an assembly explanatory view showing a first embodiment of a composite heat exchanger according to the present invention.

FIG. 2 is an assembly explanatory view showing a second embodiment of the heat exchanger.

FIG. 3 is a perspective view showing another embodiment of the connection fitting 11 in FIG. 2;

FIG. 4 is an essential part cross-sectional view of the first heat exchanger 9 and the second heat exchanger 10 connected by the connection fitting 11;

FIG. 5 is a perspective view showing still another example of the combined heat exchanger of the present invention.

FIG. 6 is a sectional view of a main part of the heat exchanger.

FIG. 7 is an assembly explanatory view showing still another example of the combined heat exchanger of the present invention.

FIG. 8 is a perspective view of a connection fitting 11 used in the present invention.

FIG. 9 is a side view of a main part of the first heat exchanger 9 and the second heat exchanger 10 connected by a vertical U-shaped portion 18 used in the present invention.

FIG. 10 is a perspective view showing still another embodiment of the combined heat exchanger of the present invention.

FIG. 11 is a side view of a main part of the heat exchanger.

FIG. 12 is an assembly explanatory view showing still another embodiment of the combined heat exchanger of the present invention.

FIG. 13 is a side view of a main part of the heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube 2 Fin 3 First core 4 Second core 5 First tank 6 Second tank 7 First support material 8 Second support material 9 First heat exchanger 10 Second heat exchanger 11 Connection fitting 12 Connection protrusion 13 Folded part 14 Projected part 15 Concave part 16 Convex part 17 Horizontal U-shaped part 18 Vertical U-shaped part 19 Folded part 20 End cover 21 Locking part 22 Engaging part 23 Hole 24 Spacer part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoaki Horie 3-25-3 Yoyogi, Shibuya-ku, Tokyo F-term in Toyo Radiator Co., Ltd. (reference) 3L065 FA19

Claims (9)

[Claims] A first core (3) and a second core (4) are respectively formed by a number of tubes (1) and fins (2) arranged in parallel, and both ends of each tube (1) are paired. A first tank (5) and a pair of second tanks (6), and a pair of groove-shaped first support members at both ends of the first core (3) and the second core (4) in the tube parallel direction. (7) and a second support member (8) are arranged with the opening side facing outward,
The heat exchanger (9) and the second heat exchanger (10) are separately assembled, and the first support material (7) and the second support material (8) are arranged in parallel and close to each other. Connect the connecting projections (1) of the connecting fitting (11) or one of the supporting members between the members (7) and (8).
By means of caulking, press-fitting, or fitting into each other according to 2), spacer means for holding a certain gap between the first core (3) and the second core (4) are formed. Manufacture of a composite heat exchanger in which a brazing material is coated or arranged in advance between parts connected to each other, and the whole is put into a furnace, and the parts are integrally brazed and fixed. Method. 2. The folded part (13) according to claim 1, wherein the connecting part (11) is a short groove type, and a folded part (13) having a U-shaped cross section is formed on the outer surface side of both side walls. A method of manufacturing a composite heat exchanger configured to be fitted to a side wall of the support members (7), (8). 3. The connector according to claim 1, wherein the connection fitting has a short groove shape, and both ends of the groove bottom protrude longer than widths of both side walls thereof, and the protrusion is formed by the first support portion. (7) A method of manufacturing a composite heat exchanger configured to be fitted into a concave portion (15) and / or a convex portion (16) of a side wall edge of a second support (8). 4. The support member according to claim 1, wherein the width of at least one of the first support member (7) and the second support member (8) is larger than the width of the core, and the edge portion of at least one of the support members. A method of manufacturing a composite heat exchanger, wherein the connecting projection (12) formed of a U-shaped folded portion is formed on the second support member, and the folded portion is fitted to the edge of the other support material. 5. A first core (3) and a second core (4) are respectively formed by a number of tubes (1) and fins (2) arranged in parallel, and both ends of each tube (1) are paired. A first tank (5) and a pair of second tanks (6), and a pair of groove-shaped first support members at both ends of the first core (3) and the second core (4) in the tube parallel direction. (7) and a second support member (8) are arranged with the opening side facing outward,
The heat exchanger (9) and the second heat exchanger (10) are separately assembled, and the first support material (7) and the second support material (8) are closely arranged in parallel at right angles to each other. Connect metal (7) and (8)
(11) or one of the supporting protrusions for connection of the support material (12)
By caulking or press-fitting or fixing each other, or by fitting into each other, a spacer means for holding the first core (3) and the second core (4) with a certain gap therebetween is formed, A method of manufacturing a composite heat exchanger in which a brazing material is previously coated or arranged between connected parts and the whole is put into a furnace, and the parts are integrally brazed and fixed. 6. The connecting metal fitting (11) according to claim 5, wherein the connecting metal part (11) is formed of a horizontal U-shaped part (17) formed by folding a plate material in a horizontal direction, and one of the horizontal U-shaped part (17). A vertical U-shaped portion (18) folded back from the edge in a vertical direction perpendicular to the edge, and the vertical U-shaped portion (18) fits on the side wall of the first support portion (7). And a horizontal U-shaped part (17) fitted to the side wall part of the second support part (8). 7. The longitudinal direction of at least one of the first support member (7) and the second support member (8), wherein at least one of the first support member and the second support member has a width larger than a width of the core. At the end, a U-shaped folded portion (19) is formed on the side wall portion, and the folded portion is formed.
(19) A method of manufacturing a composite heat exchanger in which the edge of the other support member is fitted. 8. A first core (3) and a second core (4) are respectively formed by a number of tubes (1) and fins (2) arranged in parallel, and both ends of each tube (1) are paired. A first tank (5) and a pair of second tanks (6), and a pair of groove-shaped first support members at both ends of the first core (3) and the second core (4) in the tube parallel direction. (7) and a second support member (8) are arranged with the opening side facing outward,
The heat exchanger (9) and the second heat exchanger (10) are separately assembled, and the first support material (7) and the second support material (8) are arranged in close proximity to and orthogonal to each other. The tank of one of the heat exchangers is formed of a tubular body, and an end cover (20) is fitted to an end of the tubular body.
A locking portion (21) is protruded from an edge of the heat exchanger, and the locking portion (21) is fitted to the engaging portion (22) of the side wall portion of the support material of the other heat exchanger, thereby forming the second heat exchanger. One core (3) and second core (4)
Spacer means for holding a certain gap is formed between the parts, and the whole is put in a furnace in a state where the brazing material is previously coated or arranged between the parts connected to each other, and A method of manufacturing a composite heat exchanger in which parts are integrally brazed and fixed. 9. A composite heat exchanger manufactured by the manufacturing method according to claim 1.