JPH1019490A - Heat-exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate detection of defective joining between the partition parts of a header tank and repair of the defective joining. SOLUTION: A heat-exchanger is formed such that the interior of a header tank is partitioned into a plurality of chambers 34, 35, 44, and 45 and a heat- exchange fluid flows to a tube through a plurality of the chambers. The header tank comprises peripheral wall members 30 and 40 formed by bending a single metallic sheet 110; and a cap to close the opening surface of the end part of the peripheral member. The peripheral members 30 and 40 comprise partition parts 33 and 43 comprised by a U-shaped bent part positioned at the middle portion of the single metallic sheet 110; and a tube support part 114 having insertion holes 36 and 46 in which a tube end part is inserted. An end part 112 is joined with the vicinity of the top parts of the partition parts 33 and 43 in a way that the top parts of the partition parts 33 and 43 are exposed to the outside.

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 flow passage for distributing a heat exchange fluid (for example, water) to a plurality of tubes arranged in parallel and collecting fluid from each tube is formed by a header tank. In a vessel, it relates to a partition structure for partitioning the inside of the header tank into multiple spaces,
For example, it is suitable for use in a water-air heat exchanger in a hybrid electric vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, as a partition structure in a tank of a heat exchanger, there is one described in Japanese Patent Application Laid-Open No. 62-153885. According to this publication, a tube end is inserted and joined by a header plate to be joined and a box-shaped tank plate to be joined to the header plate.
Constructs a header tank.

[0003] A partition plate formed separately is disposed in the header tank, and the ends of the partition plate are brazed to the inner wall surfaces of the header plate and the tank plate, so that the inside of the header tank is removed. It partitions into multiple rooms.

[0004]

However, in the above-mentioned prior art, since a partition plate formed separately is disposed in the header tank, the end of the partition plate, the header plate and the tank plate are not provided. All the brazing points with the inner wall surface are located in the header tank over the entire length of the partition plate.

[0005] If a brazing defect occurs at the junction of the partition plate, a bypass flow of a heat exchange fluid such as water occurs in the partition plate portion, and the fluid does not flow into the tube through the regular flow path. In addition, the heat exchange performance is greatly reduced.
Therefore, it is desirable that the brazing failure of the partition plate can be easily found at the time of manufacturing the heat exchanger. However, in the above-described conventional technique, all brazing portions of the partition plate are housed in the header tank and cannot be visually observed from the outside, so that it is difficult to externally inspect whether the brazing portion of the partition plate is appropriate.

Further, since the brazing portion of the partition plate is located in the header tank, it cannot be repaired when a brazing failure occurs. In order to prevent the brazing failure of the partition plate beforehand, it is effective to increase the dimensional accuracy of the partition plate and the tank plate,
On the other hand, the improvement of the dimensional accuracy increases the number of processing steps and increases the processing cost of these parts, and thus cannot be said to be a practical measure.

[0007] The present invention has been made in view of the above points,
It is an object of the present invention to provide a heat exchanger capable of easily detecting defective joints of a partition part in a header tank and repairing the defective joints.

[0008]

In order to achieve the above object, the present invention employs the following technical means. Claims 1-6
In the described invention, the inside of the header tank (3, 4) is partitioned into a plurality of chambers (34, 35, 44, 45), and via the plurality of partitioned chambers (34, 35, 44, 45). In the heat exchanger in which the heat exchange fluid flows through the tube (5), the header tank (3, 4) is formed by bending a single metal plate (110) into a peripheral wall member (3).
0, 40) and a cap (31, 32, 41, 42) for closing the end opening surface of the peripheral wall member (30, 40). The peripheral wall member (30, 40) includes at least
A partition part (3) consisting of a U-shaped bent part
3, 43) and a tube support (114) having an insertion hole (36, 46) into which the end of the tube (5) is inserted, and the end (112) of the peripheral wall member (30, 40) is provided. ,
It is characterized in that the tops of the partition portions (33, 43) are exposed to the outside and joined to the vicinity of the top portions of the partition portions (33, 43).

According to the above technical means, the peripheral wall member (3
Since the tops of the partitions (33, 43) of (0, 40) are exposed to the outside, the partitions (33, 43) and the end (112) are exposed.
It is also possible to directly visually observe the brazing portion from outside. Therefore, when a brazing defect occurs at the brazing portion and a fluid leak occurs, the fluid leak can be directly visually observed, so that the brazing defect can be easily found.

Further, when a brazing failure occurs due to the above-mentioned brazing portion being exposed to the outside, the brazing failure can be easily repaired from outside the heat exchanger. Further, one metal plate (110) is bent and formed, and the partition portions (33, 43) are formed into the peripheral wall members (30, 4).
0), the header tank (3,
The number of joints of the peripheral wall members (30, 40), which are the main body portion of 4), can be reduced to a minimum, and a highly reliable structure against joint leakage can be obtained.

In particular, according to the third aspect of the present invention, the end portion (1
The joining portion between the 12) and the partition portions (33, 43) is connected to the tube support portion (11) in the peripheral wall member (30, 40).
It is characterized in that it is set at a site on the opposite side to that of (4). As a result, the tops of the partition portions (33, 43) are exposed to the outside at a portion opposite to the core portion (2). It can be easily performed from the outside without being disturbed by (2).

In the invention according to claim 4, the end portion (1
12) has a bent shape bent toward the inside of the tank, and the outer surface of the end portion (112) having this bent shape is joined by being brought into contact with the vicinity of the top of the partition portion (33, 43). And Thereby, the joining area of the end (112) can be increased, and the joining strength can be improved. In the invention according to claim 5, the metal plate (110) is made of a three-layer clad material in which a brazing material is clad on the outer surface of the core material and a sacrificial corrosion material is clad on the inner surface of the core material. Department (11
2) is characterized in that it is brazed to the vicinity of the tops of the partitions (33, 43) with a brazing material on the outer surface of the metal plate (110).

Thus, the corrosion resistance of the inner surface of the peripheral wall member which is in contact with a fluid such as water can be improved by the sacrificial corrosion of the sacrificial corrosive material while securing the brazing function between the end portion (112) and the partition portions (33, 43). Can be improved. In the invention according to claim 6, the end of the tube (5) is joined, and the cap (31,
32, 41, 42) and the end (112) are simultaneously joined by integral brazing.

By this integral brazing, a heat exchanger can be manufactured efficiently. In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means of embodiment mentioned later.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the overall shape of a heat exchanger to which the present invention is applied. The illustrated heat exchanger 1 is used as a water-air heat exchanger in an air conditioner for a hybrid electric vehicle. The heat exchanger 1 is disposed in an air conditioning unit case (not shown), and exchanges heat between conditioned air blown in the direction of arrow A in the case and cold or hot water flowing through the heat exchanger 1. To cool or heat the conditioned air.

Each member of the heat exchanger 1 shown in FIG. 1 is formed of an aluminum alloy, and is assembled in a state shown in FIGS. 1 and 2, and this assembled state is held by an appropriate jig. Meanwhile, the heat exchanger assembly is carried into the brazing furnace, and the entire heat exchanger assembly is integrally brazed. Next, each part of the heat exchanger 1 will be specifically described. The heat exchanger 1 is roughly divided into the above-described conditioned air and the heat exchanger 1.
A core portion 2 for exchanging heat with water flowing through the inside, and header tanks 3 arranged at both upper and lower ends of the core portion 2;
And 4. The core portion 2 includes a number of flat tubes 5 arranged in parallel in the left-right direction, and corrugated fins 6 arranged and joined between the flat tubes 5.

The flat tube 5 is formed into a well-known flat cross section, and is arranged so that its flat surface is parallel to the air flow direction A. Further, the flat tubes 5 are arranged in three rows along the air flow direction A as shown in FIG. As a specific material of the flat tube 5, in this example, an Al—Zn-based sacrificial corrosion material (A7) is formed on the inner surface (water-side surface) of an aluminum alloy core material such as A3003.
072 material) and an Al-Si brazing material (material equivalent to A4343) on the outer surface (surface on the air side).
And a three-layer clad material is used.

The flat tube 5 is formed by bending the three-layer clad material into a flat cross section (an elliptical cross section) and then joining the bent ends by welding. The corrugated fin (fin means) 6 is made of an aluminum bare material (eg, A
3003) is formed obliquely by a roller or the like and bent into a corrugated shape having pieces (louvers), and brazed to the outer surface (air-side surface) of the flat tube 5 with the brazing material on the outer surface of the tube. . Both ends of the flat tube 5 are inserted into the insertion holes 3 of the header tanks 3 and 4.
6 and 46 (see FIGS. 3 and 4), and are joined so as to communicate with the internal space of the header tanks 3 and 4.

The present invention is characterized in that the partition structure for partitioning the internal space of the header tanks 3 and 4 into a plurality of chambers is formed integrally with the header tanks 3 and 4 by a single metal plate. The header tanks 3 and 4 extend in the left-right direction of FIG. 1 (in other words, extend over the entire length of the core portion 2 in the width direction), and the peripheral wall members 30 and 4
It is composed of caps 31 and 32 and caps 41 and 42 for closing the end opening surface of the zero.

The peripheral wall members 30, 40 are formed by bending a single metal plate as described later, and have a sectional shape as shown in FIGS.
Is a horizontally long rectangle having And this partition 3
Reference numerals 3 and 43 are arranged at positions where the internal space of the header tanks 3 and 4 partitions the three rows of flat tubes 5 in the air blowing direction A into two rows of tube groups and one row of tube groups.

Here, the two peripheral wall members 30 and 40 have the same shape in a single state, but in the heat exchanger assembled state,
As shown in FIG. 2, the two peripheral wall members 30 and 40 are assembled by reversing the positions of the partitions 33 and 43 left and right and up and down. FIG. 3 shows an end face opening shape of the peripheral wall member 30 of the upper header tank 3, and FIG. 4 shows an end face opening shape of the peripheral wall member 40 of the lower header tank 4. Perimeter wall member 3
At 0, the partition 33 separates the inlet chamber 34 and the outlet chamber 35 from each other. The inlet chamber 34 has a size corresponding to a group of tubes in one row, and 1 at the downstream side in the air flow direction A. Tube insertion holes 36 for rows are opened.

The outlet chamber 35 has a size corresponding to two rows of tube groups, and two rows of tube insertion holes 36 are opened on the upstream side in the air flow direction A.
In the peripheral wall member 40 of the lower header tank 4, as shown in FIG. 4, a partition 43 separates an inlet chamber 44 and an outlet chamber 45, and the inlet chamber 44 corresponds to a tube group for two rows. The tube insertion holes 46 for two rows are opened on the downstream side in the air flow direction A.

The outlet chamber 45 has a size corresponding to one row of tube groups, and one row of tube insertion holes 46 is opened on the upstream side in the air flow direction A.
As shown in FIG. 1, an inlet pipe 38 is joined to the cap 32 joined to the right opening surface of the peripheral wall member 30 of the upper header tank 3.
Since 8 is open to the inlet chamber 34, water from the inlet pipe 38 flows into the inlet chamber 34.

An outlet pipe 48 is joined to the cap 41 joined to the left opening surface of the peripheral wall member 40 of the lower header tank 4, and the outlet pipe 48 is open to the outlet chamber 45. The water in the outlet chamber 45 flows out of the outlet pipe 48. Inlet pipe 38
And the outlet pipe 48 are connected to a water circulation circuit having a cold water source or a hot water source (not shown). In addition, these two pipes 3
Reference numerals 8 and 48 are formed of an aluminum bare material (for example, A3003) in which a brazing material is not clad.

FIG. 5 shows the caps 31, 32, 41, 4
2 is an enlarged illustration, and the metal plate constituting these caps is a cladding material of an aluminum alloy in this example. Specifically, A300 is used as a core material of a metal plate.
An Al-Zn sacrificial corrosive material (a material equivalent to A7072) is clad on one side surface (the inner side surface on the water side) of this core material using an aluminum alloy such as an aluminum alloy, and the other side surface (the air side). Al-Si brazing material (A4
343) is used.

The caps 31, 32, 41, and 42 have first bulging portions 10 formed in sizes corresponding to the inlet chamber 34 of the peripheral wall member 30 and the outlet chamber 45 of the peripheral wall member 40.
0, and the second bulging portion 1 formed in a size corresponding to the outlet chamber 35 of the peripheral wall member 30 and the entrance chamber 44 of the peripheral wall member 40.
01 and a partitioning portion 103 formed between the bulging portions 39a and 39b by press molding. The partition 103 is formed by the partition 3 of the peripheral wall members 30 and 40.
3, 43, the inlet chambers 34, 44 and the outlet chamber 35,
Partition between 45.

In the cap 32, the first bulge 10
0, a hole (not shown) is formed, and the inlet pipe 38 is inserted into the hole.
And are joined by the brazing material on the outer surface of the cap 32. Similarly, in the cap 41, the first bulging portion 1
00, a hole (not shown) was made, and an outlet pipe 4
8 are fitted and joined by the brazing material on the outer surface of the cap 41.

Next, the method of manufacturing the header tanks 3 and 4 will be described in detail. The metal plate forming the peripheral wall members 30 and 40 is made of an aluminum alloy clad material in this embodiment. Specifically, an aluminum alloy such as A3003 is used as the core material of the metal plate, and Al-Z is formed on one side of the core material (the inner surface of the bent portion, which is on the water side).
An n-type sacrificial corrosive material (material equivalent to A7072) was clad, and an Al-Si-type brazing material (material equivalent to A4343) was clad on the other side surface (the outer surface of the bend and the air-side surface). A three-layer clad material is used.

The cladding ratio of the sacrificial corrosion material on the inner surface is preferably about 10% of the total thickness of the metal plate.
The cladding ratio of the brazing material on the outer surface is approximately 7 times the total thickness of the metal plate.
About 10% is preferable. The total thickness of the metal plate is about 6 mm. FIG. 6 shows a processing step of the peripheral wall members 30 and 40. First, FIG. 6A shows a blanking step in which the metal material made of the three-layer clad material is flattened to a predetermined size. And cut it into an unfolded shape. Reference numeral 110 indicates a metal plate after this blanking step.

Next, as shown in FIG. 6 (b), a U-shaped bent portion 111 is formed at a predetermined intermediate portion of the metal plate 110 by press molding. Next, as shown in FIG. 6 (c), the U-shaped bent portion 111 is press-bonded by press molding, and press-formed until the middle gap of the U-shape disappears, thereby forming the above-described peripheral wall members 30, 40. Partitions 33, 43
To form

Next, as shown in FIG.
10, end portions 1 on both left and right sides of the partition portions 33 and 43.
12 is bent at right angles. Next, FIG.
As shown in FIG.
A portion 113 on the end 112 side is bent in a right angle direction from an intermediate portion between the partition 12 and the partition portions 33 and 43. The right-angle bent portion 113 forms a tank wall portion.

Next, as shown in FIG.
10, the tank wall 113 and the partition 3
An elliptical pilot hole 115 along the cross-sectional shape of the flat tube 5 is punched in a portion (tube support portion) 114 between the tubes 3 and 43. Here, in the tube support portion 114 on the right side of the partitioning portions 33 and 43, a large number of pilot holes 1 (the same number as the number of tubes arranged in the left-right direction in FIG. 1) arranged in one row.
In the tube support portion 114 on the left side of the partitions 33 and 43, a large number of pilot holes 115 arranged in two rows are punched.

Next, as shown in FIG. 6 (g), burring is performed on the oblong prepared hole 115, and the peripheral edge of the prepared hole 115 is sectioned in the thickness direction of the metal plate 110. Launch in an arc shape. Thus, the tube insertion holes 36 and 46 described above with reference to FIGS. By providing the tube insertion holes 36 and 46 with the projections having a smooth shape having an arc-shaped cross section, the insertion holes 36 and
The insertion of the end of the flat tube 5 into the end 46 can be easily performed.

Next, as shown in FIG. 6 (h), the tank wall 113 is moved inward from the middle thereof (the partition 33,
43 side) at a predetermined angle (45 ° in this example).
Next, as shown in FIG.
3 is further bent to a state where a bending angle of 90 ° is formed, and the end portion 112 is divided into the partition portions 33 and 4.
3 is brought into contact with the side surface near the top. Thereby, the final shape of the peripheral wall members 30 and 40 formed of one metal plate 110 is completed. The end faces (both left and right end faces in FIG. 1) of the partition parts 33 and 43, the tube support part 114, and the tank wall part 113 constituting the peripheral wall members 30 and 40 are the cap 3
1, 32, 41, and 42 are the end opening surfaces to be joined.

Here, the outer surface of the end portion 112 (ie,
Since the brazing material is clad on the side surfaces near the tops of the partitions 33 and 43, the end 112 and the partitions 33 and 43 are brazed using the brazing material on the outer surface of the metal plate 110. it can. This brazing can be performed in a furnace at the same time as the brazing of the entire assembly structure of the heat exchanger shown in FIGS.

Next, the operation of the present embodiment in the above configuration will be described. As shown in FIG. 2, water from the inlet pipe 38 first enters the inlet chamber 34 of the upper header tank 3, and from there, The air is distributed to the group of flat tubes 5 at the most downstream in the air flow direction A, and the flat tubes 5 descend to enter the inlet chamber 44 of the lower header tank 4. The water makes a U-turn in the inlet chamber 44 and is distributed to the group of flat tubes 5 in the middle in the air flow direction A, and rises up the flat tubes 5 to enter the outlet chamber 35 of the upper header tank 3.

The water makes a U-turn in the outlet chamber 35,
The air is distributed to a group of flat tubes 5 in the uppermost stream in the air flow direction A, and the flat tubes 5 descend to enter the outlet chamber 45 of the lower header tank 4. Water flows out of the outlet chamber 45 through the outlet pipe 48. That is, the water flows while meandering in an S-shape by the flow path partition of the partition portions 33 and 43 in the heat exchanger 1.

On the other hand, the conditioned air flows in a direction orthogonal to the flow of water in each flat tube 5 and in a form opposite to the flow of water, and flows through the corrugated fins 6. Heat exchange with the water in the room. Flat tube 5
When the water in the inside is cold water, the conditioned air can be cooled, and when the water in the flat tube 5 is hot water, the conditioned air can be heated.

As described above, the heat exchange performance of the heat exchanger 1 can be improved by performing the orthogonal counter-flow heat exchange between the conditioned air and the water. In addition, since the sacrificial corrosive material is disposed on each of the flat tubes 5, the caps 31, 32, 41, and the inner surfaces of the peripheral wall members 30 and 40 of the header tanks 3 and 4, It is possible to suppress the progress of corrosion of the inner surface in contact with water due to the sacrificial corrosion action, and improve the corrosion resistance of the inner surface in contact with water.

As described above, the peripheral wall members 30, 4
Since the tops of the partitioning parts 33 and 43 of 0 are exposed to the outside,
The brazing portion can also be directly visually observed from the outside. For this reason, if a brazing defect occurs at the brazing portion and water leakage occurs, the water leakage can be directly visually observed, so that the brazing defect can be easily found. In addition, since the joining portion between the end portion 112 of the tank wall portion 113 and the partition portions 33 and 43 is set at a portion facing the tube support portion 114 in the peripheral wall members 30 and 40, the peripheral wall members 30 and 40 The tops of the partition portions 33 and 43 are exposed to the outside at a portion opposite to the core portion 2. Therefore, when a brazing defect occurs, the brazing defect can be easily repaired from outside the heat exchanger without being disturbed by the core portion 2.

In FIG. 1, a broken line portion indicated by reference numeral 112 is an end portion 112 to be brazed to the tops of the partition portions 33 and 43. All brazing portions extending in the left-right direction in FIG. The practical benefit of being able to easily find and repair defective parts from outside the heat exchanger is significant. On the other hand, the side end faces of the partitions 33, 43 of the peripheral wall members 30, 40 and the caps 31, 32, 4
The brazing portions 1 and 42 with the partition portion 103 cannot be exposed to the outside, but the length of the brazing portion is only the height of the cap shown in FIG. It is small compared to the length of the brazing point.
Therefore, the partition 1 of the caps 31, 32, 41, 42
Even if the dimensional accuracy of the brazing portion 03 is increased to prevent the occurrence of defective brazing, the increase in processing cost is slight and does not pose a practical problem.

Also, as shown in FIG. 6, one metal plate is bent and formed, and the partition portions 33 and 43 are connected to the peripheral wall member 3.
Since they are integrally formed with the header tanks 3 and 4, the joints between the peripheral wall members 30 and 40, which are the main body portions of the header tanks 3 and 4, can be reduced to a minimum, and a structure with high reliability against joint leaks can be obtained. be able to. (Other Embodiments) In the above embodiment, as shown in an enlarged view of the cap shape in FIG.
Although 41 and 42 are integrally formed of one metal plate, the caps 31, 32, 41 and 42 are respectively
03 may be divided into two parts at the center position, and the part on the first bulging part 100 side and the part on the second bulging part 101 side may be formed separately. With this configuration, in each cap, the side end surfaces of the partition portions 33 and 43 of the peripheral wall members 30 and 40 are externally provided between the portion on the first bulging portion 100 side and the portion on the second bulging portion 101 side. , And it is easy to find and repair defective brazing between each cap and the side end surfaces of the partition portions 33 and 43 of the peripheral wall members 30 and 40.

[Brief description of the drawings]

FIG. 1 is a front view of a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an end view of a peripheral wall member of an upper header tank in the heat exchanger of FIG. 1;

FIG. 4 is an end view of a peripheral wall member of a lower header tank in the heat exchanger of FIG. 1;

5A is a front view of a cap in the heat exchanger of FIG. 1, and FIG. 5B is a side view of the cap.

6 is a process chart of a peripheral wall member of the upper and lower header tanks in the heat exchanger of FIG. 1;

[Explanation of symbols]

2, core part, 3, 4 header tank, 5 flat tube, 30, 40 peripheral wall member, 31, 32, 41, 42 ...
Caps, 33, 43 ... partitioning parts, 34, 35, 44,
45: chamber, 36, 46: tube insertion hole, 110: metal plate, 112: end, 113: tank wall, 114: tube support.

Claims (6)

[Claims] 1. A header tank (3, 4) having a number of tubes (5) through which a heat exchange fluid flows, and header tanks (3, 4) joined so that ends of the tubes (5) communicate with each other. , 4) are divided into several rooms (3
4, 35, 44, 45) in which the heat exchange fluid flows through the tubes (5) through the plurality of compartments (34, 35, 44, 45). The header tank (3, 4) is made of one metal plate (11
Peripheral wall member (30, 40) formed by bending 0)
And a cap (31, 32, 41, 42) for closing an end opening surface of the peripheral wall member (30, 40). (33, 4)
3) and a tube support portion (114) having an insertion hole (36, 46) into which an end of the tube (5) is inserted, and an end (112) of the peripheral wall member (30, 40). ) Is joined near the tops of the partitions (33, 43) such that the tops of the partitions (33, 43) are exposed to the outside. 2. A header tank (3, 4) having a number of tubes (5) through which a heat exchange fluid flows, and header tanks (3, 4) joined so that ends of the tubes (5) communicate with each other. , 4) are divided into several rooms (3
4, 35, 44, 45) in which the heat exchange fluid flows through the tubes (5) through the plurality of compartments (34, 35, 44, 45). The header tank (3, 4) is made of one metal plate (11
Peripheral wall member (30, 40) formed by bending 0)
And a cap (31, 32, 41, 42) for closing an end opening surface of the peripheral wall member (30, 40). A U-shaped part is provided at an intermediate portion of the one metal plate (110). A partition part (33, 43) formed of a bent part is formed. In the one metal plate (110), an end of the tube (5) is formed at a portion following both sides of the partition part (33, 43). A tube support portion (114) having an insertion hole (36, 46) to be inserted is formed, and a tank wall portion (113) is formed on the one metal plate (110) at a portion following the tube support portion (114). The end (112) of the tank wall (113) is placed near the top of the partition (33, 43) such that the top of the partition (33, 43) is exposed to the outside. Joining said one metal plate (110) More, the partition portion (3
3, 43), the tube supporting portion (114), and the peripheral wall member (30, 4) having the tank wall portion (113).
A heat exchanger, wherein the heat exchanger is integrated with the heat exchanger. 3. A joining portion between the end portion (112) and the partition portion (33, 43) is connected to the peripheral wall member (30, 43).
40. The apparatus according to claim 1, wherein in (40), the tube support section (114) is set at a portion opposite to the tube support section (114).
Or the heat exchanger according to 2. 4. The end portion (112) has a bent shape bent inward of the tank, and the outer surface of the bent end portion (112) is formed by the partition portions (33, 43).
The heat exchanger according to any one of claims 1 to 3, wherein the heat exchanger is abutted and joined near a top portion of the heat exchanger. 5. The metal plate (110) is made of a three-layer clad material in which a brazing material is clad on an outer surface of a core material and a sacrificial corrosion material is clad on an inner surface of the core material. 5. The heat according to any one of claims 1 to 4, wherein the brazing material is brazed near the top of the partition part (33, 43) by a brazing material on the outer surface of the metal plate (110). Exchanger. 6. The joining of the end of the tube (5), the joining of the caps (31, 32, 41, 42) and the joining of the end (112) are performed simultaneously by integral brazing. 6. One of claims 1 to 5, characterized in that:
The heat exchanger according to any one of the above.