JPH0560484A - Heat exchanger - Google Patents

Abstract

PURPOSE:To permit the block brazing of a header with good workability without employing any jig by a method wherein a mounting bracket is provided with an extended plate unit and a L-shaped hooking plate unit while one end in the widthwise direction of a tube is fitted forcibly between both plate units and the brazing plate unit is retained on the outer peripheral surface of the header to fix it temporarily. CONSTITUTION:A mounting bracket 6 is, for example, formed by press out of an aluminum sheet, having a brazing plate unit 11, an extended plate unit 13 and an L-shaped hooking plate unit 14, which are formed integrally. The brazing plate unit 11 is arranged on the outer peripheral surface of an aluminum header 3 and the extended plate unit 13 is so arranged as to cross an aluminum tube 1, and the tube 1 is fitted by pressing between the hooking plate unit 14 and the extended plate unit 13. The bracket 6 is brazed to the header 3 integrally under this condition. By this method, the incorporated condition of the bracket 6 before block brazing becomes stable without any come-off of parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger made of metal such as aluminum used as a condenser for car air conditioners, a heat exchanger for room air conditioners and the like.

[0002]

2. Description of the Related Art Recently, for example, as a condenser for a car cooler, a pair of hollow headers are assembled in a communicating state at both ends of a plurality of tubes arranged in parallel at a predetermined interval. A so-called multi-flow type or parallel-flow type heat exchanger having a structure integrally joined to each other tends to be preferably used because it can realize high heat exchange performance and low pressure loss.

A mounting bracket for mounting the heat exchanger body on the vehicle body or for supporting the intermediate portion of the refrigerant pipe is mounted on the heat exchanger. As a mounting method for this bracket, recently, a mounting bracket having a brazing plate portion arranged in surface contact along the outer peripheral surface of the header is used, and the brazing plate portion is in surface contact with the outer peripheral surface of the header. The method of joining the bracket to the header is often adopted by collectively arranging the bracket and the tubing together with the tubing and the header.

By the way, in the method of joining the bracket to the header by collective brazing, it is necessary to assemble the bracket to the header in a temporarily fitted state until the brazing is completed. Conventionally, this temporary fitting has been performed by using a special jig or spot welding the brazing plate portion to the header by argon welding.

[0005]

However, the use of the jig has a problem that the structure of the jig itself becomes complicated and the manufacturing cost is increased, and the jig is removed after brazing. There was a problem that work was required and productivity deteriorated.

[0006] Further, in the temporary fixing by argon welding, not only the brazing work efficiency is still poor, but also expensive argon welding equipment must be prepared, which leads to an increase in equipment cost. However, there was also a problem that the heat was affected by the header and the like, and the quality was deteriorated.

The present invention solves the above-mentioned conventional drawbacks, and collectively brazes the mounting bracket to the header without using a jig, while maintaining good workability and high quality of the header. It is an object of the present invention to provide a heat exchanger having a structure capable of performing.

[0008]

According to the present invention, the ends of a plurality of flat tubes arranged in parallel at predetermined intervals are connected to the peripheral side surface of a cylindrical header so as to communicate with each other. In the heat exchanger, a brazing plate portion arranged in surface contact with the outer peripheral surface of the header along the circumferential direction, and a tube which is integrally extended from one end of the brazing plate portion in the circumferential direction and traverses the tube. The extension plate portion projecting to one end in the width direction of the tube and the side edge portion of the tip of the extension plate portion are integrally connected to each other, and the one end portion in the width direction of the tube is cooperated with the side edge portion of the extension plate portion. A mounting bracket having an L-shaped hooking plate portion for sandwiching the brazing plate portion, the brazing plate portion is arranged along the outer peripheral surface of the header, and the extension plate portion is arranged to cross the tube. And side edges of L-shaped hooking plate and extension plate The heat exchanger is characterized in that it is assembled in such a manner that one end portion in the width direction of the tube is forcibly fitted between and the bracket, and in that state, the bracket is joined and integrated with the header by collective brazing. ..

The term "mounting bracket" means a bracket for mounting the heat exchanger body on the mounting side of the vehicle body, a bracket for supporting the intermediate portion of the heat exchange medium inlet pipe, and the outlet pipe. Alternatively, it is used in a sense including various brackets such as a pedestal bracket for attaching these brackets.

[0010]

In the above heat exchanger, the width direction one end of the tube is forcibly inserted into the bracket between the side edge of the extension plate crossing the tube and the L-shaped hooking plate. The brazing plate part is temporarily fixed in surface contact with the outer peripheral surface of the header, and since it is brazed collectively in that state, the brazing is performed until brazing is completed after temporary fitting. Acts as a self-jig and is brazed together while being held in an appropriate assembled state. Further, in the temporary assembling process, quality deterioration due to heat influence or the like does not occur on the header or the like.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a multi-flow type aluminum condenser for a car cooler will be described with reference to the drawings.

The heat exchanger of the present invention can be widely applied to various heat exchangers having at least one header, such as heat exchangers for room air conditioners, radiators and oil coolers. Nor.

In the car cooler condenser shown in FIG. 3, (1) is a flat tube, and (2) is a corrugated fin, which are arranged in parallel in an alternating arrangement in the vertical direction. (3) (3) is a pair of left and right headers,
It is connected to both ends of the flat tube (1) in a communicating state. (4) is an inlet pipe, and (5) is an outlet pipe. And
(6) is a mounting bracket for mounting the heat exchanger body on the vehicle body. In addition, (8) is a partition member, which partitions the inside of the headers (3) and (3) at a predetermined height position so that the heat exchange medium flows in a meandering manner through the tube (1) group. (9) and (9) are side plates, which are arranged on the outer sides of the upper and lower outermost corrugated fins to protect them.

In each of the above heat exchanger constituent members, the flat tube (1) is made of an aluminum extruded mold material, and as shown in FIG. 2 (b), the inside is divided into a plurality of chambers by partition walls. So-called harmonica tubes are used that have been partitioned to improve pressure resistance and heat transfer performance.
An electric resistance welded pipe may be used regardless of the extruded mold material.

The corrugated fin (2) is a corrugated sheet material having a width approximately the same as the width of the tube (1) and cut and raised louvers. The sheet material is clad with a brazing material layer. A brazing sheet is used. The corrugated fin (2) may be formed of a normal aluminum sheet instead of the brazing sheet.

The headers (3) and (3) are cylindrical headers formed in a pipe shape by bending one aluminum brazing sheet having a brazing material layer clad on one side or both sides in a state where both side edges are butted. Open the upper and lower ends of the pipe (3a) with an aluminum header cap (3b)
It is the one that is closed by the external fitting. As the header pipe (3a), an electric resistance welded pipe, an extruded pipe or the like may be used.

The mounting bracket (6) is a press-formed product of an aminium sheet, and as shown in FIGS. 1 and 2, the brazing plate portion (11) and the mounting plate portion ( 12), the extension plate portion (13) and the L-shaped hooking plate portion (14) are integrally provided.

The brazing plate portion (11) has a header (3).
It is bent in an arc shape along the outer peripheral surface of the header (3)
It is arranged to be in surface contact with the outer peripheral surface of the. It should be noted that the outer peripheral surface of the header (3) and / or the bracket (6) are so arranged that a brazing material layer for collectively brazing them is interposed between the brazing plate portion (11) and the header (3). In general, a brazing material layer is clad on the inner surface of the brazing plate (11).

The mounting plate portion (12) is integrally connected to the end portion of the brazing plate portion (11) on the outer side in the circumferential direction so as to project outward. (12a) is a mounting hole.

The extension plate portion (13) is a brazing plate portion (11).
Is connected to the end portion on the inner side in the circumferential direction of the tube (1), extends across the tube (1), and the tip portion thereof is projected outward from one end in the width direction of the tube (1). ..

The L-shaped hooking plate portion (14) is integrally connected to the lower side edge of the extension plate portion (13), and the lower side of the extension plate portion (13) is connected. The one end portion in the width direction of the tube (1) is sandwiched by cooperation with the side edge portion.

In manufacturing the heat exchanger, first, the respective heat exchanger constituent members are assembled in a temporarily assembled state. That is, a plurality of flat tubes (1) are arranged in parallel in the thickness direction at predetermined intervals, 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 (3c), and the corrugated fins (2) are 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 attached to the headers (3) and (3).

In addition to these, as shown in FIGS. 1 and 2, the brazing plate portion (11) of the mounting bracket (6) is in surface contact with the outer peripheral surface of the end portion of the header (3). And the extension plate (13) so as to cross the tube (1), and the L-shaped hooking plate (14).
One end of the tube (1) in the width direction is forcibly fitted between the extension plate portion (13) and the lower edge of the extension plate portion (13). This allows
The mounting bracket (6) is assembled to the header (3) in a properly arranged state in a temporarily fitted state, and then, until the brazing is completed, the mounting bracket (6) may be displaced or come off at the assembling position. Is maintained in a proper arrangement state.

There is no particular limitation on the order of assembling the heat exchanger constituent members, and the heat exchanger may be assembled in an appropriate order.

Then, the heat exchanger assembly is not placed or passed through the brazing furnace, and the heat exchanger constituent members are
The side edges of the header pipe (3a) are brazed together, and the whole is joined and integrated. The heat exchanger is manufactured as described above.

In the embodiment shown in FIG. 4, an extension plate portion (13) that traverses the tube (1) is used as a bracket (6).
The L-shaped hooking plate portion (14) connected to this and the L-shaped hooking plate portion (14) formed in a size that can be inserted into the gap between the tubes (1) (1) are used. With this configuration,
The bracket (6) can be collectively brazed not only at the end of the header (3) but also at a desired position in the middle of the header (3) in the longitudinal direction.

[0027]

As described above, the heat exchanger of the present invention is
The mounting bracket has an extension plate portion that traverses the tube and an L-shaped hooking plate portion, and by forcibly fitting one end portion in the width direction of the tube between them, the brazing plate portion. Is held in surface contact with the outer peripheral surface of the header, temporarily laid down, and then brazed together to the header in that state, so deterioration of header quality, such as in the case of conventional temporary fixing by argon welding, The header can be maintained in good quality without any occurrence, and the facility cost can be reduced by eliminating the argon welding facility, and the product cost can be reduced. Moreover, since the bracket functions as a self-jig, it is not necessary to remove the jig after brazing as in the case of using a jig, and the work efficiency of brazing can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a header, a tube, a bracket and the like in a separated state.

FIG. 2 is a view showing a temporary assembled state of the bracket, which is shown in FIG.
Is a front view, (b) is a sectional view taken along the line II of (a), and (c) is a plan view.

FIG. 3 (a) is an overall front view of the heat exchanger, and FIG. 3 (b) is a plan view.

4A and 4B show a heat exchanger according to another embodiment, wherein FIG. 4A is a perspective view of the bracket, and FIG. 4B is a front view of the bracket temporarily assembled.

[Explanation of symbols]

 1 ... Flat tube 3 ... Header 6 ... Mounting bracket 11 ... Brazing plate part 13 ... Extension plate part 14 ... Hook plate part

Claims (1)

[Claims] 1. A heat exchanger in which end portions of a plurality of flat tubes arranged in parallel at predetermined intervals are connected to a peripheral side surface of a cylindrical header in a communicating state with each other. And a brazing plate portion arranged in surface contact with each other, and an extension plate that extends integrally from one end in the circumferential direction of the brazing plate portion, traverses the tube, and projects to one end side in the width direction of the tube. Part and an edge part of the extension plate part which are integrally connected to each other, and an L-shaped hooking plate part which holds the one end part in the width direction of the tube by cooperation of the side edge part of the extension plate part. A mounting bracket having and a brazing plate portion arranged along the outer peripheral surface of the header, and an extension plate portion arranged so as to cross the tube,
In addition, it is assembled in a state where one end portion in the width direction of the tube is forcibly fitted between the L-shaped hooking plate portion and the side edge portion of the extension plate portion, and in this state, the bracket is attached to the header by collective brazing. A heat exchanger characterized by being joined and integrated.