JPH0765868B2 - Method for manufacturing aluminum heat exchanger core - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for manufacturing an aluminum heat exchanger core.

[0002]

2. Description of the Related Art Heretofore, as a heat exchanger core made of aluminum, one disclosed in, for example, Japanese Utility Model Laid-Open No. 60-170587 is known.

As a heat exchanger using this aluminum heat exchanger core, a radiator is shown in FIGS. 12 and 13.
It will be described based on. After tentatively assembling the core 11 of the radiator 9 by disposing the reinforcing members 7 made of aluminum material on both sides of the core element 11a composed of the tube 1 made of aluminum material clad with the brazing material, the fins 3 and the seat plate 15, Fluoride flux is applied to the core 11 of the radiator 9 and placed in a brazing furnace, and then nitrogen gas is pumped into the furnace at 30 to 40 m ³ / hr to raise the temperature to 580 to 620 ° C. The brazing process is carried out by holding at the brazing temperature of 3-20 minutes.

After that, the tank 5 is attached to obtain a product. In the conventional brazing process, while disassembling the core 11 of the radiator 9 temporarily assembled, the core 11 of the radiator 9 expands in the lateral direction by the brazing process. The core 11 of the radiator 9 is pressed from the outside by the baking jig 13 disclosed in Japanese Patent No. 4866 to integrally braze it.

In FIG. 12, reference numeral 7a designates a folding piece provided on both sides of the aluminum reinforcing member along the longitudinal direction thereof. A shroud (not shown) is provided on one of the folding pieces 7a. Mounting holes 8 are provided.

[0006]

However, the above-mentioned baking jig 1 is used.
In No. 3, the manufacturing cost was high, and the dimensional error caused by the lateral expansion of the core 11 of the radiator 9 due to the expansion of the baking jig 13 itself due to the heat could not be prevented.

In addition, the core 1 of the radiator 9 temporarily assembled
Since the lateral dimension L1 of No. 1 is not uniform, a lot of labor is required to attach such a baking jig 13 whose length is set in advance, and the work efficiency at the time of brazing is reduced. Was one of the causes.

Further, since the baking jig 13 is expensive, it is necessary to reuse it after the brazing process, but there is a problem in that its maintenance is troublesome. The present invention has been made to solve such a conventional problem, and an object thereof is to wind a wire around a temporarily assembled core instead of a conventional baking jig, bind the wire, and tighten the wire. SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for manufacturing an aluminum heat exchanger core which improves the workability of tightening a temporarily assembled core and prevents deformation of the aluminum reinforcing member by a wire.

[0009]

According to a first aspect of the present invention, there is provided an aluminum heat exchanger core in which aluminum reinforcing elements are integrally brazed to both sides of an aluminum heat exchanger core element consisting of a tube, fins and a seat plate. In the manufacturing method of 1., a reinforcing member made of an aluminum material is provided on both sides of the aluminum heat exchanger core element, and a plurality of convex portions each having a flat top are provided at the same position. A wire is laid over each convex portion of the material-made reinforcing member to bind the aluminum heat exchanger core element and both reinforcing members together, and then brazing is carried out according to a conventional method.

According to a second aspect of the present invention, the convex portion is provided integrally with the aluminum reinforcing member. Claim 3
The convex portion is made of a detachable member.

According to a fourth aspect of the present invention, the aluminum-made reinforcing member has a notch portion at a portion which faces the both sides of the folded piece provided in the longitudinal direction and which sandwiches the convex portion. .

[0012]

In the present invention, first, the reinforcing member made of aluminum is provided on both sides of the aluminum heat exchanger core element with a plurality of convex portions having flat tops at the same position. Distribute. Then, a wire is laid over each convex portion of both aluminum material reinforcing members to bind the aluminum heat exchanger core element and both aluminum material reinforcing members. At this time, the convex portion functions as a spacer to prevent deformation of the aluminum reinforcing member. After the temporary assembly of the aluminum heat exchanger core is completed, it is brazed according to a conventional method.

In particular, according to the fourth aspect, since the notch is located at the position where the wire is bound, the wire can be bound at a predetermined place.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of a method for manufacturing an aluminum heat exchanger core according to claims 1, 2 and 4,
In the figure, 17 represents a radiator.

The core 11 of the radiator 17 is a core element 11 including a tube 1 made of an aluminum material clad with a brazing material, fins 3 and a seat plate 15, as in the conventional example.
After arranging the aluminum-made reinforcing members 19 on both sides of a and temporarily assembling, a flux of fluoride is applied and put in a brazing furnace, and brazing is performed in this furnace through the same steps as the conventional example. It is something.

The tank 17 is attached to form the radiator 17. In this embodiment, during the brazing process, the wire 20 is wound around the core element 11a of the radiator 17 and bound, and the convex portion 21 is formed on the aluminum reinforcing member 19 as described below.
In addition, a notch 23 is formed in the folded piece 19a of the aluminum reinforcing member 19.

As shown in FIGS. 2 to 4, the aluminum reinforcing member 19 is provided with folded-back pieces 19a on both sides thereof in the longitudinal direction, and the seat plate 15 is provided on both upper and lower ends.
A support piece 25 for supporting is formed.

The aluminum reinforcing member 1
On the center line m in the longitudinal direction of 9, projecting portions 21 that are higher than the folded-back piece 19a and project outward are integrally formed at two locations.

Further, a cutout portion 23 is provided at a portion of the folded-back piece 19a which faces each other with each convex portion 21 interposed therebetween. Thus, as shown in FIG. 1 or 5, when the wire 20 is hung over the convex portion 21 and the notch portion 23 and bound together before the brazing process, the convex portion 21 functions as a spacer, Deformation of both side portions 19b of the aluminum-made reinforcing member 19 at the portion where the cutout portion 23 is formed is suppressed.

The top portion 21a of the convex portion 21 is formed in a flat shape in order to prevent the bundled wires 20 from being displaced. Although not shown, the aluminum reinforcing member 19 arranged on the other side of the core element 11a also has the same structure, and the respective convex portions 21 are provided at the same positions.

Since the aluminum-made reinforcing member 19 in this embodiment is constructed in this manner, the wire 20 is hooked on the projection 21 and the notch 23 when brazing the core 11 of the radiator 17. Even when the core 11 is tightened by passing it over, since the cutout portion 23 is formed in the folded piece 19a which is faced with the convex portion 21 interposed therebetween, the bundled wire 2 is formed.
0 does not contact the folded piece 19a and deform it. Further, in this case, the convex portion 21 functions as a spacer to suppress the deformation of the both side portions 19b by the wire 20.

As described above, in this embodiment, the radiator 17
For the brazing process of the core 11, the conventional baking jig 13
The wire 20 is used instead of the wire 20, and the wire 20 is cored through the projection 21 and the notch 23 because the wire 20 has a structure as described above in order to prevent the aluminum reinforcing member 19 from being deformed by the wire 20. Even if you tie it around 11
The folded piece 19a and both side portions 19b are no longer deformed by the wire 20.

Further, according to the present embodiment, when the core 11 of the radiator 17 is brazed, even if the lateral dimension L2 of the temporarily assembled core 11 is not uniform, the wire 20 is simply wound around the core 11. Since the wire 20 is cheaper than the conventional baking jig 13, the wire 20 is less expensive than the baking jig 13 and can be disposable, so that the wire 20 can be reused for maintenance and inspection. The annoyance was eliminated.

Further, the wire 20 is wound and bound to form the core 1.
When the convex portion 21 as described above is not provided on the aluminum-made reinforcing member 19 when tightening 1, further
If the folded-back piece 19a is not provided with the notch 23, the wire 20 will come into contact with the angular end portions 19b of the aluminum-made reinforcing member 19 and the folded-back piece 19a. In case of doing, it is troublesome to shift this up and down to correct it.

However, in this embodiment, since the convex portion 21 functions as a spacer and the wire 20 is hard to contact with both side portions 19b of the aluminum reinforcing member 19,
It is easy to position the wires 20 that are accidentally bundled in a diagonal direction by slightly shifting them in the vertical direction, and as a result,
The workability of temporarily assembling the core 11 of the radiator 17 is improved.

The number of protrusions 21 provided on the aluminum-made reinforcing member 19 is not limited to that in the above embodiment, and a plurality of protrusions 21 may be provided on the center line m of the aluminum-made reinforcing member 19. . However, in any case, the folded-back pieces 19a located on both sides of each convex portion 21 need to be provided with the cutout portions 23, respectively.

FIG. 6 shows an example in which a plurality of projections 21 are arranged on the center line m of the aluminum-made reinforcing member 27 without the folding piece 19a. Incidentally, FIG. 7 is a sectional view taken along line 7-7 of FIG.

Also in this embodiment, the wires 2 on both side portions 27b of the reinforcing member 27 made of aluminum are formed by the respective convex portions 21.
The deformation due to 0 can be prevented, and the tightening work efficiency of the core 11 is improved. Therefore, it is possible to achieve the intended purpose as in the first embodiment.

FIG. 8 shows a modified example of the convex portion 21. The convex portion 29 is provided on the longitudinal center line m of the aluminum-made reinforcing member 19 so as to be higher than the folded piece 19a and protrude outward. It has a split rugby ball shape and its top 29
As shown in FIG. 9, a is formed flat so as to prevent the wire 20 from being displaced.

FIG. 10 is a sectional view taken along the line 10-10 in FIG. Then, the intended purpose can be achieved also by the reinforcing member 19 made of an aluminum material in which the convex portion 29 is formed.

Further, as shown in FIG. 11, the convex portion 21 provided on the aluminum reinforcing member 19 has the same height h in the longitudinal direction of the aluminum reinforcing member 19 over a predetermined length.
It may be a convex portion 29b having an R-shaped cross section.

Further, although not shown, as described in claim 3, instead of the convex portions 21 and 29 or the convex portion 29b, these are formed by a reinforcing member made of an aluminum material and a detachable member. You may arrange | position these at the reinforcing member made from an aluminum material at the time of binding.

However, in this case, in the case of the aluminum-made reinforcing member provided with the folding piece, it is necessary to provide the notch at a predetermined position as in the first embodiment,
Further, it is necessary to dispose the above-mentioned member that forms the convex portion between the cutout portions.

In each of the above embodiments, the method of applying a flux of fluoride and placing it in the brazing furnace for brazing has been described, but a treatment process may be performed in which the brazing furnace has a vacuum atmosphere.

In each of the above embodiments, the case where the present invention is applied to the radiator has been described, but a heater core may be used. Furthermore, in each of the above embodiments, the core element and the aluminum reinforcing member are wound with a wire, bundled and integrally brazed, and then the tank is attached. The reinforcing member made of material may be wound around the wire and bound to braze the three members together.

[0036]

As described above, according to the present invention,
Since the wire may be wound around the aluminum heat exchanger core temporarily assembled before brazing and tightened, the workability of tightening the aluminum heat exchanger core during brazing is improved, and The advantage is that deformation of the aluminum reinforcing member due to the binding wires can be prevented.

[Brief description of drawings]

1 is a partial perspective view of a radiator according to a method of manufacturing an aluminum heat exchanger core according to claims 1, 2, and 4;

FIG. 2 is a front view of a reinforcing member made of an aluminum material integrally provided with a convex portion in FIG.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a side view of a reinforcing member made of an aluminum material integrally provided with the convex portion in FIG.

5 is a schematic explanatory view showing a state in which the radiator cores according to the embodiment shown in FIG. 1 are bound by wires. FIG.

FIG. 6 is a front view showing a modified example of the aluminum reinforcing member integrally provided with the convex portion in FIG.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is a front view showing a main part of another modification of the aluminum reinforcing member integrally provided with the convex portion in FIG.

9 is a cross-sectional view taken along the line 9-9 of FIG.

10 is a cross-sectional view taken along the line 10-10 of FIG.

FIG. 11 is a perspective view showing a main part of still another modified example of the aluminum-made reinforcing member integrally provided with the convex portion in FIG. 1.

FIG. 12 is an overall perspective view showing a state where a core of a conventional radiator that has been temporarily assembled is pressed by a baking jig.

FIG. 13 is a schematic plan view showing a state where a radiator core is temporarily assembled by a baking jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tube 3 fin 5 tank 11 core 11a core element 17 radiator 19,27 aluminum material reinforcing member 19a folding piece 20 wire 21, 29, 29b convex part 21a, 29a top 23 cutout

Claims (4)

[Claims] 1. A method of manufacturing an aluminum heat exchanger core, comprising integrally brazing aluminum reinforcing members to both sides of an aluminum heat exchanger core element comprising a tube, fins and a seat plate. On both sides of the heat exchanger core element, an aluminum material reinforcing member having a plurality of convex portions each having a flat top is provided at the same position, and the aluminum material reinforcing members are provided on the respective convex portions. A method for manufacturing an aluminum heat exchanger core, which comprises bundling wires to bind the aluminum heat exchanger core element and both reinforcing members, and then brazing them according to a conventional method. 2. The method for manufacturing an aluminum heat exchanger core according to claim 1, wherein the convex portion is provided integrally with the aluminum reinforcing member. 3. The method for manufacturing an aluminum heat exchanger core according to claim 1, wherein the convex portion is made of a detachable member. 4. The reinforcing member made of aluminum material has a notch portion at a portion which faces the both sides of the folded piece provided across the longitudinal direction so as to sandwich the convex portion. Item 4. A method for manufacturing an aluminum heat exchanger core according to any one of Items 1 to 3.