JP3051478B2 - Brazing method of mounting bracket for heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for brazing a mounting bracket in a metal heat exchanger such as aluminum used as a condenser for a car air conditioner, a heat exchanger for a room air conditioner, and the like.

[0002]

2. Description of the Related Art Recently, a pair of hollow headers are connected to both ends of a plurality of tubes arranged in parallel at a predetermined interval as a condenser for a car cooler, for example. Of the structure integrated into the
A so-called multi-flow type or parallel-flow type heat exchanger tends to be used favorably as a device capable of realizing high heat exchange performance and low pressure loss.

The heat exchanger is provided with a mounting bracket for mounting the heat exchanger body to a vehicle body or for supporting an intermediate portion of a refrigerant pipe. As a method for attaching this, recently, a mounting bracket having a brazing surrounding piece portion surrounding the header outer circumferential surface in the circumferential direction is used, and the inner surface of the surrounding piece portion is arranged in surface contact with the header outer circumferential surface, In this state, a method of joining the bracket to the header by performing collective brazing together with the collective brazing of the tube and the header, and the like, has been increasingly adopted.

In the method of attaching the bracket to the header by brazing, it is necessary to temporarily assemble the bracket to the header before performing the collective brazing. This has been done by using a jig or by spot welding the surrounding piece to the header by argon welding.

[0005]

However, the use of a jig not only has a problem that the structure of the jig itself becomes complicated and increases the manufacturing cost, but also the work of removing the jig after brazing. There was a problem such as necessity and poor workability.

[0006] In addition, the temporary welding by argon welding is still not enough to improve the efficiency of brazing work, and expensive argon welding equipment must be prepared, which leads to an increase in equipment cost. In addition, there is also a quality problem that the header is adversely affected by the welding by argon welding, thereby deteriorating the quality of the header.

[0007] The present invention solves the above-mentioned drawbacks of the related art, and brazes a mounting bracket to a header.
It is an object of the present invention to provide a method which can be performed with good workability and high quality of a header without using a jig.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a tubular header in which the ends of a plurality of tubes (1) (1) arranged in parallel at predetermined intervals are connected in a communicating state. Mounting bracket to be brazed to (3)
(6) A brazing enclosing piece (10) having a semicircular cross section arranged in surface contact with the outer peripheral surface of the header (3 ).
And an outwardly protruding state at the outer side edge of the surrounding piece (10).
A mounting piece (11) continuously provided with the surrounding piece (10)
Mating piece continuously connected to the inner side edge of
(12) and the tip of the fitting piece
In addition, the height of the tube (1) substantially corresponds to the gap between the tubes (1).
It is formed in the shape of a rectangular plate and has an engagement hole (13) in the center.
Use the one provided with the formed fitting part (12a).
The combination with this mounting bracket (6)
With a semicircular cross-section header surrounding piece (14)
There is an inward projection on the inner side edge of the body
The engagement projection (15) is integrally connected to the
An L-shaped engaging portion (15a) is formed at the tip of the portion (15).
Mounting bracket (14)
(6) the surrounding piece (10) and the header surrounding piece (14)
In a predetermined position on the outer peripheral surface of the header (3).
And fitting piece (12) in bracket (6)
Forcibly fit the fitting part (12a) between the tubes (1) and (1)
On the other hand, the surrounding piece is inserted into the engaging hole (13) of the fitting portion (12a).
L-shaped engagement part (15a) in (14) is fitted and engaged.
In this state, the mounting bracket (6) and
And the surrounding piece (14) are temporarily attached to the header (3).
In this state, the bracket (6) and the surrounding piece
The gist of the present invention is a brazing method of a mounting bracket in a heat exchanger, which comprises brazing (14) and a header.

The term "mounting bracket" refers to a bracket for mounting the heat exchanger body to a mounting side of a vehicle body or the like, a bracket for supporting a heat exchange medium inlet pipe and an intermediate portion of the heat exchange medium pipe, Or, it is used in a sense including various brackets such as a pedestal bracket for attaching these brackets.

[0010]

[Action] In the above method, the temporarily secure the bracket to the header, a period of tube fitting piece of the bracket Sukihama case
And, by being made to those performed by Rukoto combined to surround piece engagement with the bracket is worked self jig manner, until brazing ends, to hold the proper arrangement. Also, there is no quality adverse effect on the header in a series of work steps until the end of brazing.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a method of brazing a mounting bracket to a vehicle body to an aluminum condenser body for a car cooler will be described with reference to the drawings. It is needless to say that the method of the present invention can be widely applied to various heat exchangers having a header such as a heat exchanger for a room air conditioner and an oil cooler.

In the condenser for a car cooler as a manufactured product shown in FIG. 3 and FIG. 4, (1) is a flat tube, (2) is a corrugated fin, and these are alternately arranged in a vertical state. Are located in (3) (3)
Is a pair of left and right headers, which are connected to both ends of the flat tube (1) in a communicating state. (4) is an inlet pipe, which is connected to the right header (3), and (5) is an outlet pipe, which is connected to the left header (3). (6) is a mounting bracket for mounting the heat exchanger body to the vehicle body. The partition member (8) partitions the headers (3) and (3) at predetermined height positions so that the heat exchange medium flows in a meandering manner through the tubes (1). (9) and (9) are side plates disposed outside the upper and lower outermost corrugated fins (2) and (2) to protect them.

In each of the above-mentioned heat exchanger components, the flat tube (1) is made of an extruded aluminum member, and is internally divided into a plurality of chambers by partition walls to enhance heat transfer performance. Uses a harmonica tube. In addition, an electric resistance welded tube may be used irrespective of the extrusion material.

The corrugated fin (2) is formed by shaping a sheet material having a width substantially equal to the width of the tube (1) into a corrugated shape and cutting and forming a louver. You are using a brazing sheet. In addition, corrugated fin (2)
May be formed from a normal aluminum sheet instead of a brazing sheet.

The headers (3) and (3) are pipe-shaped cylindrical headers formed by bending a single aluminum brazing sheet having a brazing material layer clad on one or both sides thereof into a state in which both side edges are abutted. The upper and lower end openings of the pipe are externally fitted with aluminum header caps. In addition, an electric resistance welded pipe, an extruded pipe, or the like may be used as the header pipe.

The mounting bracket (6) is a press-formed product of an aminium brazing sheet having a brazing material layer clad on one side or both sides, and as shown in FIG. An encircling piece (10) having a semicircular cross section arranged in surface contact with the outer peripheral surface;
Mounting piece portion which is continuously provided on the outwardly protruding state in a side edge portion of the outer side of the 0) and (11), and, inwardly projecting state to the side edges of the inner side of the surrounding piece (10) The connecting piece (12) is integrally provided with the connecting piece (12). The brazing material layer is located on the inner surface side. A fitting portion (12a) is formed at the tip of the fitting piece (12). This fitting portion (12a) is formed in a rectangular plate shape, and its height is formed to substantially match the gap between the tubes (1), and is forcibly fitted into the gap between the tubes (1). It has been done. An engagement hole (13) is formed in the center of the fitting portion (12a).

( 14) is a header enclosing piece having a semicircular arc section , and is a press-formed product made of an aluminum brazing sheet having a brazing material layer on an inner surface thereof. Attached in combination. An engaging protrusion (15) is integrally connected to an inner side edge of the header surrounding piece (14) in an inwardly protruding state, and a distal end of the engaging protrusion (15) is A letter-shaped engaging portion (15a) is formed.

In the manufacture of the heat exchanger, first, the components of the heat exchanger are assembled in a mutually tentatively assembled state. That is, a plurality of flat tubes (1) are arranged side by side at predetermined intervals in the thickness direction thereof, and headers (3) are provided at both ends thereof.
(3) is fitted by inserting the end of the tube (1) into the tube insertion hole (3a), and the corrugated fin (2) is inserted and arranged between the tubes (1). Further, the upper and lower side plates (9) and (9) are arranged outside the outermost fins (2) and (2), and the inlet / outlet pipes (4) and (5) are assembled to the header (3).

At the same time, as shown in FIGS. 1 and 2, the surrounding piece (1) of the mounting bracket (6) is used.
0) is disposed at a predetermined position in the height direction of the outer peripheral surface of the header (3), and the fitting portion (12a) of the fitting piece (12) is forcibly fitted into the gap between the tubes (1). The mounting bracket (6) is temporarily attached to the header (3). Thereby, the mounting bracket (6)
Keeps the proper arrangement state at the assembling position without causing a displacement until brazing is completed after assembling to the header (3).

Further, in conjunction with the mounting of the bracket (6), the engaging portion (15a) of the header holding piece (14) is fitted into the engaging hole (13) of the mounting bracket (6). No engagement with the bracket (6) with the surrounding piece (14)
Is disposed on the outer periphery of the header (3), and assembled into a heat exchanger assembly. The order of assembling the heat exchanger components is not particularly limited, and may be performed in an appropriate order.

Then, the heat exchanger assembly is passed through a brazing furnace, and the components of each heat exchanger are brazed to each other, and the whole is joined and integrated. Thus, a heat exchanger is manufactured. In the obtained heat exchanger, the outer peripheral portion of the header (3) has the surrounding piece (10) of the bracket (6) and the header surrounding piece (1) at the bracket mounting position.
4), the header (3) has high pressure resistance.

[0022]

As described above, according to the method of brazing the mounting bracket in the heat exchanger according to the present invention, the mounting bracket is provided with a semicircular cross section arranged in surface contact with the outer peripheral surface of the header (3). The arc-shaped brazing enclosure piece (1
0), and outwardly projecting from the outer side edge of the surrounding piece (10).
A mounting piece portion (11) continuously provided in a state, and the surrounding piece portion;
(10) Fitted inwardly protruding from the inner side edge of (10)
The fitting piece (12) and the tip of the fitting piece.
At the end, there is a height that approximately corresponds to the gap between the tubes (1) (1).
It is formed in the shape of a square plate with a hole at the center for engagement (13)
Use the one provided with the fitting part (12a) formed with
On the other hand, in combination with this mounting bracket (6),
And semicircular cross section header surrounding piece (14)
And an inwardly projecting shape on the inner side edge of the main body.
In this state, the engaging projection (15) is integrally connected,
An L-shaped engaging part (15a) is formed at the tip of the protruding part (15).
The mounting bracket using the enclosed piece (14)
(6) the surrounding piece (10) and the header surrounding piece (14)
In a predetermined position on the outer peripheral surface of the header (3).
And fitting piece (12) in bracket (6)
Forcibly fit the fitting part (12a) between the tubes (1) and (1)
On the other hand, the surrounding piece is inserted into the engaging hole (13) of the fitting portion (12a).
L-shaped engagement part (15a ) in (14) is fitted and engaged.
In this state, the mounting bracket (6) and
And the surrounding piece (14) is temporarily attached to the header (3), which may cause a problem such as deterioration of the header quality as in the case of the conventional argon welding. It is possible to perform brazing of the bracket while keeping the header of good quality, and also to reduce the equipment cost. In addition, since the bracket functions as a self jig, it is not necessary to remove the jig after brazing as in the case of using the jig, and the work efficiency of the brazing operation can be improved.

Also, by engaging with the bracket (6),
Can the rudder enclosure (14) be temporarily fastened to the header (3)?
Also, another jig is used for mounting the surrounding piece (14) itself.
It can be easily done without. In addition, the bracket (6)
At the attachment position, the outer periphery of the header (3) is
(6) to the surrounding piece (10) and the header surrounding piece (14)
Increased pressure resistance of header (3) because it is surrounded
You. And also the header (3) of the bracket (6)
The mounting strength with respect to can also be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounting bracket and a header in a separated state.

FIG. 2 is a front view showing a state where a mounting bracket is assembled to a header.

FIG. 3 is an overall front view of the heat exchanger.

FIG. 4 is an overall side view of the heat exchanger.

[Explanation of symbols]

1 ... flattened tubes 3 ... header 6 ... Bracket 10 ... surrounding piece 12 ... fitting piece portions 12a ... fitting portion 13 ... engaging hole 14 ... Header surrounding piece 15 ... protrusion 15a ... engaging portion for engagement

Claims (1)

(57) [Claims] 1. A mounting bracket ( 3) brazed to a tubular header (3) in which the ends of a plurality of tubes (1) (1) arranged in parallel at predetermined intervals are connected in a communicating state. 6) A brazing surrounding piece (1 ) having a semi-circular cross section arranged in surface contact with the outer peripheral surface of the header (3).
0), and outwardly projecting from the outer side edge of the surrounding piece (10).
A mounting piece portion (11) continuously provided in a state, and the surrounding piece portion;
(10) Fitted inwardly protruding from the inner side edge of (10)
The fitting piece (12) and the tip of the fitting piece.
At the end, there is a height that approximately corresponds to the gap between the tubes (1) (1).
It is formed in the shape of a square plate with a hole at the center for engagement (13)
Use the one provided with the fitting part (12a) formed with
On the other hand, in combination with this mounting bracket (6),
The semicircular arc-shaped header surrounding piece (14)
The inner side edge of the main body is in an inwardly protruding state.
The joint protrusion (15) is connected integrally, and the engagement protrusion is provided.
An L-shaped engaging portion (15a) is formed at the tip of (15).
Using the surrounding piece (14), the surrounding piece (10) and the fitting bracket (6).
With the rudder surrounding pieces (14) facing each other,
It is arranged at a predetermined position on the outer peripheral surface and
Insert the fitting part (12a) of the fitting piece (12) in the tube
(1) Forcibly fitting between the (1) and the fitting portion (12a)
L-shaped engaging portion of the surrounding piece (14) in the engaging hole (13)
(15a) is fitted to make it engaged,
Bracket (6) and surrounding piece (14)
(3) The bracket for mounting in the heat exchanger is characterized in that the bracket (6) and the surrounding piece (14) are brazed to the header in this state. Brazing method.