JP2000161892A - Bracket coupling structure for heat exchanger header - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a brazing filler metal of a header from flowing into an installation hole of a bracket at the time of overall brazing of a heat exchanger. SOLUTION: The invention relates to a bracket coupling structure of a heat exchanger header. The structure is obtained by providing a heat exchanger header 1 with its surface covered with a brazing filler metal, and disposing a bracket 10 having a installation hole 25 so as to be coupled to the header 1, followed by melting and hardening the brazing filler metal la to connect and integrate the header and the bracket. The bracket 10 has grooves 31 to 33 which are formed at locations between brazed portions 21a and 22a and the installation hole 25, for preventing the melted brazing filler metal 1a from flowing into the installation hole 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bracket connecting structure of a heat exchanger header which is suitably applied to, for example, a heat exchanger which is collectively brazed in a furnace.

[0002]

2. Description of the Related Art In recent years, header type heat exchangers called multi-flow type or parallel flow type have been widely used as condensers for car coolers.

[0003] This heat exchanger basically comprises a plurality of flat tubes and corrugated fins arranged alternately in parallel and a pair of hollow headers arranged with both ends of each tube inserted. Provided as elements, usually these components are temporarily assembled into a predetermined heat exchanger shape, and the temporarily assembled product is collectively brazed in a furnace,
The whole is connected and integrated.

BACKGROUND OF THE INVENTION In such a heat exchanger, a bracket for assembling the heat exchanger itself to a vehicle body is sometimes attached to a header or the like by the above-described collective brazing. Proposed a bracket as shown in FIG.

The bracket (5) includes a U-shaped piece (6) having a U-shaped cross section, and an arc-shaped connecting piece (7) provided continuously at the end of one side wall of the U-shaped piece (6). In the middle wall of the U-shaped piece (6), a mounting hole (6a) in which a screw groove (6b) is engraved is formed. The connecting piece (7) of the bracket (5) is fitted to the outer peripheral surface of the header (1), and the other end of the U-shaped piece (6) abuts on the outer peripheral surface of the header (1). In the arranged state, it is connected and fixed to the header (1) by the collective brazing described above.

[0006]

However, in the bracket connecting structure of the heat exchanger header as the proposed example, the mounting hole (6a) of the U-shaped piece (6) in the bracket (5) is formed by the header (1). In addition to being disposed at a position relatively close to the header, during the batch brazing, the U-shaped piece (6) of the bracket (5) is generally disposed below the header (1). . For this reason, the brazing material eluted from the header (1) at the time of collective brazing forms a fillet (1b), but in some cases, an excess brazing material (1a) is used to form a brazing portion (5a) with the bracket (5). 8), the brazing material (1a) flows down along the inner surface and the outer surface of the bracket (5), and the brazing material (1a) in the mounting hole (6a) of the bracket (5). To fill the screw groove (6b). When the screw groove (6b) is buried by the brazing material (1a) in this way, it becomes difficult to screw a screw or the like into the mounting hole (6a), and in some cases, the heat exchanger is assembled to the vehicle body. The problem that cannot be done occurs.

The present invention has been made in view of the above circumstances, and can prevent a brazing material of a header from flowing into a mounting hole of a bracket at the time of brazing. It is an object of the present invention to provide a bracket connecting structure for a heat exchanger header to which a fixing tool such as the above can be securely attached.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method for melting a brazing material in a state in which a bracket having a mounting hole is joined to a heat exchanger header having a brazing material provided on a surface thereof. It is a bracket connecting structure of a heat exchanger header that is solidified and connected and integrated,
The gist of the present invention is characterized in that damping means for preventing a molten brazing material from flowing into the mounting hole is provided between the brazing portion of the bracket and the mounting hole.

In the bracket connecting structure for a heat exchanger header according to the present invention, even when excess brazing material flows out to the bracket side, for example, at the time of collective brazing of the heat exchanger, etc., it is blocked by the damming means, It is possible to prevent the bracket from flowing into the mounting hole side.

In the present invention, it is preferable that the damming means is constituted by any one of a groove and a ridge provided along a length direction of the heat exchanger header.

That is, in this case, the excess brazing material that has flowed out from the header to the bracket side can be guided along the grooves and the ridges, so that the brazing material flows into the mounting hole side of the bracket more. It can be reliably prevented.

[0012]

1 to 3 show a heat exchanger to which a bracket connecting structure of a heat exchanger header according to an embodiment of the present invention is applied. As shown in these figures, this heat exchanger is a multi-flow type used as a condenser for a car cooler, and a plurality of flat tubes (2) and corrugated fins (3) are alternately arranged in parallel. A side plate (4) is disposed outside the outermost fin (3), and both ends of each tube (2) are a pair of left and right hollow headers (1).
It is arranged so as to be inserted in (1).

The headers (1) and (1) are provided with a bracket (10) for assembling the heat exchanger itself to a vehicle body, a refrigerant inlet union (7) and a refrigerant outlet union (8). And a partition plate (9) for partitioning the inside of the header and allowing the refrigerant to flow in a meandering manner.

As shown in FIGS. 2 and 3, the bracket (10) has a U-shaped piece (20) having a U-shaped cross section and a tip of one side wall (21) of the U-shaped piece (20). And a connecting piece (30) having an arc-shaped cross section which is integrally formed and can extend along the outer peripheral surface of the header (1). Further, a mounting hole (25) is formed at the center of the intermediate wall (23) of the U-shaped piece (20), and a screw groove (2) is formed on the inner peripheral surface of the mounting hole (25).
6) is engraved.

The U-shaped piece (2) of the bracket (10)
0) Inner surface of one side wall (21), other side wall (22)
The groove (31) extending continuously in the direction corresponding to the header length direction is provided at a position on the outer surface of the inner wall and the inner wall of the intermediate wall (23) closer to the other side wall (22) than the mounting hole (25). (32) and (33) are formed as damming means.

On the other hand, in the present embodiment, the heat exchanger component is made of aluminum or an alloy thereof, that is, at least the header (1), the fin (3), and the side plate (4). One made of an aluminum brazing sheet having a brazing material laminated on one surface, a flat tube (2) made of an extruded aluminum material, and a bracket (10)
Used are those made of an extruded aluminum material or a forged product, and those made of an aluminum molded product are used as the entrance / exit unions (7) and (8) and the partition plate (9).

Then, these components are temporarily assembled into a predetermined heat exchanger shape, and the temporarily assembled products are collectively brazed in a furnace, whereby the whole is integrally connected.

At the time of this brazing, the header (1)
The brazing material eluted from the material forms a fillet (1b), and in some cases, excess brazing material (1a) flows down the surface of the bracket (10). At this time, in the present embodiment, the grooves (31) to (33) are formed between the brazing portions (21a) (22a) and the mounting holes (25) in the bracket (10).
Surplus brazing material flowing down the surface of the bracket (1a)
Flows into the grooves (31) to (33) and moves along the grooves (31) to (33) by a capillary effect. For this reason, the brazing material (1a) is formed by the grooves (31) to (3).
3) is prevented from reaching the mounting hole (25) side, and the brazing material (1a) is prevented from burying the thread groove (26) on the inner peripheral surface of the mounting hole (25).

As described above, since the screw groove (26) of the mounting hole (25) in the bracket (10) is not buried by the brazing material (1a), a fixing tool such as a screw or a bolt is provided in the mounting hole (25). Can be securely screwed, and the heat exchanger itself can be securely assembled to the vehicle body.

In this embodiment, since the damming means is constituted by the grooves (31) to (33),
Material (1a) that would flow into grooves (31)-(33)
The grooves (31) to (33) by the capillary effect
Therefore, it is possible to more reliably prevent the brazing material (1a) from flowing into the mounting hole (25).

Further, in the present embodiment, the grooves (31) to (31)
Since the damming means such as (33) and the damping means in the modified examples of FIGS. 4 and 5 described later are formed continuously in the header length direction, the bracket (1) is used.
0) can be efficiently and easily produced using extrusion molding or the like.

In the present invention, the damming means comprises:
The present invention is not limited to the above-mentioned grooves (31) to (33).

For example, as shown in FIG.
Protrusions (41), (42), (43) extending continuously in a direction corresponding to the header length direction may be formed at appropriate positions in (0) to constitute a damming means.

As shown in FIGS. 5 (a) and 5 (b), both sides of the mounting hole (25) on the inner and outer surfaces of the U-shaped piece (20) of the bracket (10) have directions corresponding to the header length direction. Steps (51) and (52) may be formed to extend as a continuous damper.

Further, as shown in FIGS. 6A and 6B, a ring-shaped stepped portion (61) is formed on the outer periphery of the mounting hole (25) on both the inner and outer surfaces of the U-shaped piece (20) of the bracket (10). (6
2) or, as shown in FIGS. 7 (a) and 7 (b), a ring-shaped groove formed on the outer periphery of the mounting hole (25) on both the inner and outer surfaces of the U-shaped piece (20) of the bracket (10). (71) You may form (72) and may be comprised as a damming means.

In the present invention, it is not always necessary to form the damming means in a continuous manner, and the damming means comprising, for example, a concave portion or a convex portion may be formed at an appropriate position.

In the present invention, the bracket (1
It is not always necessary to use, as 0), a screw groove formed on the inner peripheral surface of the mounting hole (20), and a bracket having no screw groove formed on the mounting hole may be used.

[0028]

As described above, according to the bracket connecting structure of the heat exchanger header of the present invention, damming means for preventing the inflow of brazing material is formed between the brazing portion and the mounting hole of the bracket. Therefore, for example, at the time of heat exchanger batch brazing, etc., even if excess brazing material flows out to the bracket side, it will be dammed by damming means,
It is prevented from flowing into the mounting hole side. Therefore, since the brazing material can be prevented from adhering and solidifying in the mounting hole, a fixing tool such as a screw or a bolt can be securely mounted in the mounting hole, and the heat exchanger itself can be securely mounted on the vehicle body or the like. This has the effect.

In the present invention, when the damming means is constituted by a groove or a ridge, the excess brazing material flowing out from the header to the bracket side can be guided along the groove or the ridge. There is an advantage that the brazing material can be more reliably prevented from flowing into the mounting hole, and the above-mentioned effects can be obtained more reliably.

[Brief description of the drawings]

FIG. 1 is a front view showing a heat exchanger to which a bracket connecting structure of a heat exchanger header according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a bracket applied to the connection structure of the embodiment.

FIG. 3 is a cross-sectional view showing the vicinity of a bracket in the connection structure of the embodiment.

FIG. 4 is a cross-sectional view showing the vicinity of a bracket of a connection structure according to a first modification of the present invention.

FIG. 5A is a sectional view showing the vicinity of a bracket of a connection structure according to a second modification of the present invention, and a side view of FIG.

FIG. 6A is a sectional view showing the vicinity of a bracket of a connection structure according to a third modification of the present invention, and FIG. 6B is a side view.

FIG. 7A is a sectional view showing the vicinity of a bracket of a connection structure according to a fourth modification of the present invention, and FIG. 7B is a side view.

FIG. 8 is a cross-sectional view showing the vicinity of a bracket in a bracket connection structure of a heat exchanger header as a proposal example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Header 1a ... Brazing material 10 ... Bracket 21a, 22a ... Brazing part 25 ... Mounting hole 31-33 ... Groove part (barrier means) 41-43 ... Protrusion part (barrier means) 51, 52 ... Step part (barrier means) ) 61, 62 ... groove (damping means)

Claims (2)

[Claims] 1. A heat exchanger header in which a brazing material having a mounting hole is joined to a heat exchanger header provided with a brazing material on a surface thereof, and the brazing material is melted and solidified to be integrally connected. A bracket connection structure, wherein damming means for preventing a molten brazing material from flowing into the mounting hole is provided between the brazing portion of the bracket and the mounting hole. Bracket connection structure of heat exchanger header. 2. A bracket connecting structure for a heat exchanger header according to claim 1, wherein said damming means is constituted by one of a groove and a ridge provided along a length direction of said heat exchanger header. .