JPH0612383Y2 - Heat exchanger head tank - Google Patents

Description

TECHNICAL FIELD The present invention relates to a header / tank used as a component of a heat exchanger such as a radiator and an intercooler.

2. Description of the Related Art Conventionally, a header / tank, which is a component of a heat exchanger such as a radiator, is configured by a header plate and a header / tank body, each of which is made of an aluminum brazing sheet. The tank body was assembled and these peripheral portions were brazed by the vacuum brazing method.

However, in the past, it was difficult to completely braze these header plates and header tank bodies. This is because these members have variations in accuracy and may be distorted due to heating, which often results in poor setting or difficult setting. Therefore, in the past, headers after brazing
There was a problem that the tank was often reworked, and the manufacturing cost of the heat exchanger was very high.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, and to securely fix both the header plate and the header plate constituting the header tank before brazing them before brazing. There is no risk of brazing failure due to thermal expansion, rather, the fitting between the header plate and the header / tank body will become even stronger, increasing the bonding strength, and increasing the header plate / header header. In order to provide a header / tank for a heat exchanger, which has a wide contact area with the tank body and has a very good brazing property, and which can easily and inexpensively manufacture a good heat exchanger having excellent airtightness. is there.

Means for Solving the Problems In order to achieve the above object, the present invention comprises a header plate and a header tank body, and one of them is made of an aluminum brazing sheet, An outer folded edge portion is provided on the peripheral side wall of the tank body, and a rising edge portion is provided on the peripheral edge of the header plate.
In a header / tank for a heat exchanger in which the outer folded edge of the header / tank body is fitted inside the rising edge of the header plate, a temporary fixing hook is placed at the required location on the rising edge of the header plate. A pawl is provided by making two cuts at the tip, and the header and
At the tip of the outer folded edge of the tank body, there is a notch for fitting a hooking claw, and the required number of temporary hooks provided on the rising edge of the pipe holder are inward. It is bent and fitted into the notch of the outer folded edge of the corresponding header / tank body, and the tip of the hook is hooked to the lower edge of the notch, and the header and header With the tank body temporarily fixed, in this state, the outer surface of the bottom wall and outer surface of the outer folded edge of the header / tank body, and the upper surface and the rising edge of the portion closer to the rising edge of the header plate The gist is a header tank for a heat exchanger, which is brazed in close contact with the inner surface of the heat exchanger.

Action In the above, before brazing the header plate and the header / tank body, the required number of temporary retaining hooks provided on the rising edge of the header plate are bent inward, and the outside of the header / tank body The pipe fitting plate and the header / tank body are temporarily fixed to each other by being fitted in the notches of the side-turning edge portions, and the ends of the hooks being hooked to the lower edge portions of the notches. In general,
When brazing the header plate and the header / tank body by, for example, a vacuum brazing method, the two heat expand due to heating, so if the temporary fixing is not performed before brazing, Due to the difference in thermal expansion between the headers and the tank body, the header plate and tank body may be disengaged from each other, resulting in brazing failure. Is fitted into the notch of the outer folded edge of the header / tank body, and the tip of the hook is hooked to the lower edge of the notch to temporarily fix the header plate and header / tank body. As a result, there is no possibility of defective brazing due to thermal expansion due to heating.

In addition, the lower surface of the bottom wall and the outer surface of the outer wall of the outer folded edge of the header / tank body and the upper surface of the portion closer to the rising edge and the inner surface of the rising edge are closely contacted with each other. Therefore, the contact area is wide and the brazing property is very good. Also, due to the presence of the outer folded edge and rising edge, the pipe header plate and header / tank body will not be distorted due to heating during brazing, and the pipe header plate and header / tank body will be temporarily fixed. At the time of brazing, the header plate and header
When the tank body and the tank body expand due to heat, the fitting between them becomes even stronger, which is very convenient for brazing and increases the bonding strength.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 showing the first embodiment of the present invention,
The heat exchanger header tank (11) according to the present invention provided in the heat exchanger (10) is made of aluminum (including aluminum alloy), which includes the header plate (1) and the header tank body (2). ) And one of these is made of aluminum brazing sheet, and the outer side edge (4a) of U-shaped cross section is provided on the peripheral side wall (2a) of the header tank body (2). The rising edge (5) is provided at the periphery of the header plate (1), and the outer folded edge (4) of the main body of the header tank (2) is the rising edge (5) of the header plate (1). ) Is closely brazed inside.

In the above, the outer fold edge (4) of the header / tank body (2) is shaped so that its curling radius is as small as possible, and therefore the header / tank body (2) has the outer fold edge (4). Since it is reinforced by, it has rigidity and high strength. Further, such curling processing can be performed without variation in accuracy because the size and shape of the member are determined by the mold.

On the other hand, since the pipe drawing plate (1) is provided with the rising edge portion (5), the pipe drawing plate (1) similarly has high strength and does not vary in accuracy. The leading edge portion (5a) of the rising edge portion (5) is bent to be inclined outward. In addition, temporary hooking claws (6) are provided at the required locations of the rising edge (5) of the pipe draw plate (1) by making two notches at the tip (5a), respectively. Further, a notch (7) for fitting a hook is provided at the tip of the outer folded edge (4) of the header / tank body (2).

The pipe draw plate (1) and the header / tank body (2) are fitted to each other with the latter inside. In this case, since the outer folded edge portion (4) and the rising edge portion (5) are both formed with high precision, the fitting precision is good and the so-called setting property is very good, and therefore the workability is good. Also, there is no variation in the combination of both. The rising edge
Since the tip portion (5a) of (5) is bent outward and inclined, the outward folded edge portion (5) of the header / tank body (2) is guided by this and is easily fitted.

Then, in this state, the required number of temporary locking hooks (6) provided on the rising edge (5) of the pipe draw plate (1) are bent inward, and the header / tank body ( It is fitted in the notch (7) of the outer folded edge (4) of 2) and
The tip of (6) is hooked on the lower edge of the notch (7), and the header plate (1) and the header / tank body (2) are temporarily fixed.

Pipe assembly plate (1) and header / tank body in the above combination
(2) is brazed by, for example, a vacuum brazing method, the lower surface of the bottom wall portion (4a) of the outer folded edge portion (4) of the header / tank body (2) and the outer surface of the outer wall portion (4b) Since the upper surface of the part (1a) near the rising edge of the header plate (1) and the inner surface of the rising edge (5) are in close contact with each other, the contact area is wide and the brazing property is very good. Is. In addition, the presence of the outer folded edge (4) and the rising edge (5) does not cause distortion in the header plate (1) and header / tank body (2) due to heating during brazing. Since the pipe header plate (1) and the header / tank body (2) are thermally expanded, the fitting between them becomes even stronger, which is extremely convenient for brazing. In this case, a small concave groove (8) having a substantially V-shaped cross section is formed in the inclined edge portion (5a) of the rising edge portion (5) and the tip portion of the outer wall portion (4b) of the outward folding edge portion (4). ) Is formed, melted brazing filler metal is likely to be accumulated in the concave groove (8), so that more reliable sealing is performed.

In addition, the pipe end plate (1) is provided with pipe end fitting holes (3) in two rows at predetermined intervals, and the end portions of the flat heat exchange pipe (12) are fitted into these holes (3). (12a) is inserted in a penetrating manner.
These heat exchange tubes (12) and corrugated fins (not shown) interposed between adjacent heat exchange tubes (12) are combined with a pair of upper and lower header tanks (11) according to the present invention. They are brazed together.

FIG. 3 shows a second embodiment of the present invention. Here, the point different from the case of the first embodiment is that the guide plate
The peripheral portion (1a) of (1) is bent downward,
The edge portion (1a) and the rising edge portion (5) form a folded portion having a substantially U-shaped cross section as a whole, and the outer folded edge portion (4) of the header / tank body (2) is fitted therein. The point is that they are aligned. According to the second embodiment, the bottom wall portion (4a), the outer side wall portion (4b) and the inner side wall portion (4c) of the outer folded edge portion (4) are entirely bent in the header plate (1). Peripheral part (1
Since it is in close contact with a) and the rising edge (5), the contact area is further widened and the brazing property is further improved.

Since the other points of the second embodiment are similar to those of the first embodiment, the same components are designated by the same reference numerals in the drawings.

Effect of the Invention As described above, the header tank for a heat exchanger according to the present invention comprises the header plate and the header tank body, and one of these is made of an aluminum brazing sheet. The outer folded edge is provided on the peripheral side wall of the tank body, the rising edge is provided on the peripheral edge of the header plate, and the outer folded edge of the header / tank body is fitted inside the rising edge of the header plate. In the combined header and tank for heat exchanger, temporary hooks are provided at the required locations on the rising edge of the pipe holder by making two notches at the tip, respectively. The header / tank body has a notch for fitting the hooking claw at the tip of the outward folded edge, and the required number of temporary hooks are provided at the rising edge of the pipe header. Folds inward It is bent and fitted into the notch of the outer folded edge of the corresponding header / tank body, and the tip of the hook is hooked to the lower edge of the notch, and the header plate and header・ Tank is temporarily fixed to the tank body, and in this state, the outer surface of the bottom wall and the outer wall of the header and the outer folded edge of the tank body, and the upper surface and the rising edge of the portion closer to the rising edge of the header plate The inner surface of the part is brazed in close contact with each other.Before brazing the header plate and the header / tank body, the temporary locking hooks on the rising edge of the header plate are bent inward. Fit in the notch of the outer folded edge of the header / tank body, and the tip of the hooking part is hooked to the lower edge of the notch, temporarily fixing the header and tank body. Therefore, the header plate and header body are compared. Sai brazing by the vacuum brazing method, a thermal expansion of the tube pulling plate and header tank body, there is no possibility that they produce a defective brazing out the both fitting. On the contrary, when the header plate and the header tank body are temporarily fixed to each other and the pipe header plate and the header tank body are thermally expanded by heating during brazing, the fitting between them is further strengthened. It is extremely convenient for brazing and has the effect of increasing the bonding strength.

In addition, the lower surface of the bottom wall and the outer surface of the outer wall of the outer folded edge of the header / tank body and the upper surface of the portion closer to the rising edge and the inner surface of the rising edge are closely contacted with each other. Therefore, the contact area is wide and the brazing property is very good. Further, due to the presence of the outer folded edge portion and the rising edge portion, the pipe header plate and the header / tank body are not distorted by heating during brazing. In this way, it is possible to easily and reliably set the header plate and the header plate that make up the header / tank, complete brazing is possible, and in turn the performance with excellent airtightness. The effect is that a good heat exchanger can be manufactured easily and inexpensively.

[Brief description of drawings]

The drawings show two embodiments of the present invention. FIG. 1 is a cross-sectional view of a main part of a heat exchanger having a header tank of the first embodiment, and FIG. 2 is a header tank of FIG. FIG. 3 is a partially enlarged perspective view of FIG. 3, and FIG. 3 is a partially enlarged perspective view of the header tank of the second embodiment. (1) …… Baffle plate, (1a) …… Rise edge part, (2)
...... Header / tank body, (2a) …… Peripheral side wall, (4) …… Outside folded edge, (4a) …… Bottom wall, (4b) …… Outer wall,
(5) …… Rising edge, (5a) …… Tip, (6) …… Latching claw for temporary fixing, (7) …… Notch for fitting latching claw, (10) …… Heat exchange Vessel, (11) …… Header tank.

Claims (1)

[Scope of utility model registration request] 1. A header tank body comprising a header plate (1) and a header tank body (2), and one of these is made of an aluminum brazing sheet.
An outer folded edge portion (4) is provided on the peripheral side wall (2a) of (2), and a rising edge portion (5) is provided on the peripheral edge of the header plate (1).
In a header / tank for a heat exchanger where the outer folded edge (4) of the tank (2) is fitted inside the rising edge (5) of the header plate (1), the header plate (1) At the required location of the rising edge (5) of the above, temporary retaining hooks (6) are provided by making two cuts at the tip (5a) respectively, and correspondingly, the header / tank body ( 2) Outer folded edge
A notch (7) for fitting a hook is provided at the tip of (4), and the required number of temporary hooks provided on the rising edge (5) of the plate (1). The parts (6) are bent inward and the corresponding outer folded edges of the header tank body (2)
It is fitted in the notch (7) of (4) and the tip of the hooking part (6) is hooked on the lower edge of the notch (7), and the header plate (1) and header / tank body ( 2) is temporarily fixed, and in this state, the bottom surface of the bottom wall portion (4a) of the outer folded edge portion (4) of the header / tank body (2) and the outer surface of the outer wall portion (4b), and the header plate A header tank for a heat exchanger in which the upper surface of the rising edge portion (1a) of (1) and the inner surface of the rising edge portion (5) are brazed in close contact with each other.