JPH04363591A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve working efficiency by a method wherein a notched part, cut from the terminal surface of the peripheral wall of a header pipe by a predetermined length, is formed at the end of the same pipe and a bracket is connected to and integrated with the main body of a heat exchanger so that an inserting part, provided on the bracket for mounting, is arranged in said notched part. CONSTITUTION:Both of inserting parts 22, formed on the pipe engaging part 20 of a bracket 7 for mounting, are inserted into notched parts 16, cut from the end of a header pipe 12, to engage a lid body 13 with the end of the pipe 12. Both of the inserting parts 22 of the pipe engaging part 20 are arranged in both of the notched parts 16 of the header pipe 12. An arched plate part 21 is arranged along the outer peripheral surface of the header pipe 12. The base end of the notched parts 16 is closed by the lid body 13 whereby the lid body 13 can be incorporated into the header without using any jig. Thereafter, the heat exchanger assembly is passed through a brazing furnace to braze the whole of the assembly in one process whereby the heat exchanger can be connected and integrated.

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 and used in condensers for car coolers, heat exchangers for room air conditioners, and the like.

0002

[Prior Art] Recently, for example, as a condenser for a car cooler, a plurality of tubes are arranged in parallel at predetermined intervals, and hollow headers are assembled in communication with both ends of the tubes, and are connected to each other by brazing. Integrated joint structure
Aluminum heat exchangers, so-called multi-flow type or parallel flow type, tend to be used favorably because they can achieve high heat exchange performance, low pressure loss, and are ultra-compact.

[0003] This heat exchanger is attached with an attachment bracket for attaching the heat exchanger main body to the vehicle body or for supporting the intermediate portion of the refrigerant piping.

[0004]Recently, as a method of attaching this bracket, an aluminum bracket is used, which is temporarily assembled to the heat exchanger body using a jig, and the heat exchanger body constituent members are brazed all at once. When doing so, there is a tendency to use a method in which the bracket is also brazed all at once.

[0005]

[Problems to be Solved by the Invention] However, when assembling a bralette using a jig, such as the method described above, the number of jigs used increases depending on the shape of the bracket, etc., making it difficult to assemble the bracket. It takes time and effort,
There was a problem in that the manufacturing cost of the heat exchanger increased.

[0006] The present invention solves the above-mentioned conventional drawbacks and aims to improve manufacturing efficiency and reduce costs by reducing the number of jigs used or eliminating the need for jigs in bracket installation. The purpose is to provide a heat exchanger with a structure that allows for

[0007]

[Means for Solving the Problems] To achieve the above object, the present invention provides a heat exchanger equipped with a header having a header pipe in which the ends of a plurality of tubes are connected in a communicating state, in which the end of the header pipe is A notch part is formed in the part by a predetermined length from the end surface of the peripheral wall, and an insertion part provided on the mounting bracket is disposed within the notch part, and the bracket and the heat exchanger main body are joined and integrated. The gist is a heat exchanger characterized by:

[0008]

[Operation] In the above configuration, the bracket is assembled to the heat exchanger body by inserting the insertion part on the bracket side into the notch on the header pipe side, so that the notch can be inserted into the notch in this assembled state before joining. The movement of the bracket is suppressed like a self-jig by the engagement between the part and the insertion part. Therefore, due to this action or in conjunction with this action, the bracket is integrally joined to the heat exchanger main body in a proper assembled and arranged state. In addition, since the cut portion is cut from the end of the peripheral wall of the header pipe, it is easy to process the cut portion.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the present invention is applied to a method of attaching a bracket to an aluminum condenser for a car cooler will be described with reference to the drawings. In addition,
It goes without saying that the present invention can be applied to various types of heat exchangers having headers, such as heat exchangers for room air conditioners and oil coolers.

[0010] In the heat exchanger shown in Fig. 2 (a) and Fig. 3 (a) and (b), (1) is a flat tube;
) are corrugated fins, which are arranged alternately in parallel. (3) (3) is a pair of headers, which are connected to both ends of the flat tube (1) in a communicating state. (
4) is a refrigerant inlet pipe, and (5) is a refrigerant outlet pipe. and,
(7) is a mounting bracket for mounting the heat exchanger main body to the vehicle body at its upper part. (8)(9)
is a partition plate that partitions the inside of the header (3). In addition, (1
0) (10) are the upper and lower outermost corrugated fins (2)
This is a side plate that protects (2).

[0011] In each of the heat exchanger components described above, the flat tube (1) is made of an extruded aluminum material, and as shown in Fig. 1, the inside is divided into a plurality of chambers by partition walls. Due to the so-called harmonica tube, which has improved heat transfer performance. Note that, instead of using extruded material, electric resistance welded pipes may be used.

[0012] The corrugated fin (2) has a tube (1
) is formed into a corrugated shape with approximately the same width as the
And the louvers are cut out. This sheet material consists of an aluminum brazing sheet clad with a layer of brazing material. Note that, instead of using a brazing sheet, a normal aluminum sheet may be used.

The header (3) includes a header pipe (12) and a lid (1) that closes the end of the pipe (12).
3).

The header pipe (12) is made into a pipe shape by bending a single aluminum brazing sheet, one or both sides of which is clad with a brazing material layer, so that both edges are butted. Note that an extruded tube or an electric resistance welded tube may also be used. As shown in FIG. 1, circumferential slit-shaped tube insertion holes (14) are formed in the peripheral wall of the pipe (12) at predetermined intervals except for a predetermined length region at the upper end. A semicircular partition plate insertion hole (15) is formed in the peripheral wall portion at a position adjacent to the uppermost tube insertion hole (14), and in an area above the partition plate insertion hole (15), from the peripheral wall end surface of the pipe (12). ,
A pair of slit-shaped notches (16) (16) are formed with a phase difference of 180 degrees in the circumferential direction.

[0015] The lid (13) is a header pipe (12).
It is designed to be externally fitted onto the end of the holder so as to prevent it from coming off. Note that in cases such as extruded pipes, an internal fitting type lid may be used.

On the other hand, the mounting bracket (7) is manufactured by press-forming an aluminum plate, and as shown in FIGS. 18), a joint plate part (19) along the outer peripheral surface of the header pipe (12), and a pipe engaging part (20) disposed above them. The pipe engaging portion (20) includes an arcuate plate portion (21) along the outer circumferential surface of the header pipe (12), and is protruded outward from both sides of the arcuate plate portion (21) and is bent in the middle. It consists of a pair of left and right insertion plates (22) (22) that are shaped to face inward to each other, and as shown in FIG. )
Both insert plate parts (22) (2
2) is the notch (16) (1) of the header pipe (12).
6).

[0017] In manufacturing the heat exchanger, first, the respective heat exchanger components are assembled into a temporary assembly state. That is, a plurality of flat tubes (1) are arranged in parallel at predetermined intervals in the thickness direction, and both ends thereof are inserted and fitted into the tube insertion holes (14) of the header pipes (12) (12). At the same time, a corrugated fin (2) is inserted between the tubes (1). Also, the outermost fin (2)
(2) Upper and lower side plates (10) on the outside of (10)
At the same time, the inlet/outlet pipes (4) (5) and the refrigerant meandering partition plate (8) are assembled to the header (3).

At the same time, as shown in FIG. 1, a partition plate (9) is placed inside the header pipe (12) through the partition plate insertion hole (15) at the upper end of the pipe. Then, insert both the insertion parts (22) (22) in the pipe engagement part (20) of the mounting bracket (7) into the notches (16) (16) from the end side of the header pipe (12), and , fit the lid (13) onto the end of the pipe (12).

In this assembled state, the mounting bracket (7) has its pipe engaging portion (20), and its both insertion portions (22) (22) are connected to both notches (16) (22) of the header pipe (12). 16), the arcuate plate portion (21) is placed along the outer peripheral surface of the header pipe (12), and the base end of the notch (16) is secured by the lid (13). Due to being closed, etc.
It is assembled into the header (3) without using any jigs.

[0020] Thereafter, the heat exchanger assembly is passed through a brazing furnace and the whole is joined together by brazing at once. This produces a heat exchanger.

As a result of being able to assemble the bracket (7) as described above without using a jig, the efficiency of the assembling work can be improved, contributing to a reduction in the manufacturing cost of the heat exchanger. Of course, it is possible to use a header pipe (12
) cut part (16) directly below the (16) part with the partition plate (9)
By having a partitioned structure, the notch part (16)
The partition plate (9) can prevent refrigerant leakage due to poor brazing between the refrigerant (16) and the insertion portions (22) (22). In particular, as the partition plate (9) is used, as shown in FIG. , its certainty is high.

[0022] In the present invention, when the insertion part (22) is formed to be forcibly fitted into the notch part (16), by using the partition plate (9),
It is also possible to omit the lid (13) in the header (3). Further, when using the lid (13), the partition plate (9) may be omitted. In addition, when joining the bracket (7) with the heat exchanger assembly upright, even if the insertion part (22) is not forcibly fitted into the notch (16), its own weight will cause , since the assembled state is maintained, the lid (13) may not be fitted.

[0023]

[Effects of the Invention] According to the above, the heat exchanger of the present invention has the following features:
A notch is formed at the end of the header pipe by a predetermined length from the end surface of the peripheral wall thereof, and an insertion portion provided on the mounting bracket is disposed within the notch so that the bracket and the heat exchanger main body can be connected to each other. are integrally joined, so by inserting the insertion part of the bracket into the notch of the header pipe and placing it there, the bracket works like a self-jig and is assembled to the heat exchanger body in a state where movement is suppressed. Therefore, it is possible to improve the work efficiency of the bracket assembly work, and it is possible to contribute to a reduction in manufacturing costs. Moreover, as mentioned above, the notches are formed from the end surface of the peripheral wall of the header pipe in the length direction of the pipe, so machining is easy, and manufacturing costs can be further reduced. can contribute to

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a header pipe, a header lid, a mounting bracket, etc. in a separated state.

FIG. 2A is a front view of the heat exchanger in a bracket temporarily assembled state, and FIG. 2B is a cross-sectional view taken along the line II in FIG.

FIG. 3A is an overall front view of the heat exchanger, and FIG. 3B is a plan view thereof.

[Explanation of symbols]

1...Tube 3...Header 7...Mounting bracket 12...Header pipe 16...Notch part 22...Insert part

Claims (1)

[Claims] 1. A heat exchanger equipped with a header having a header pipe in which ends of a plurality of tubes are connected in a communicating state, wherein the end of the header pipe is cut by a predetermined length from the end surface of its peripheral wall. 1. A heat exchanger characterized in that a notch is formed, an insertion part provided on a mounting bracket is disposed within the notch, and the bracket and a heat exchanger main body are integrally joined.