JP3133374B2 - 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 heat exchanger made of metal such as aluminum used for a condenser for a car cooler and a heat exchanger for a room air conditioner.

[0002]

2. Description of the Related Art In recent years, for example, as a condenser for a car cooler, hollow headers are connected in a communicating state to both ends of a plurality of tubes arranged in parallel at a predetermined interval, and are mutually connected by brazing. Of the integrated structure,
The so-called multi-flow or parallel-flow aluminum heat exchangers tend to be used favorably as those that can achieve high heat exchange performance, low pressure loss, and ultra-compactness.

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.

Recently, as a method of attaching the bracket, an aluminum bracket is used, and the bracket is temporarily assembled to a heat exchanger body by using a jig, and the constituent members of the heat exchanger body are collectively brazed. At the same time, there is a tendency to adopt a method of brazing the brackets together.

[0005]

However, in the method of assembling a bracket using a jig as in the above method, the number of jigs used increases depending on the shape of the bracket. It takes time,
There is a problem that the production cost of the heat exchanger is increased.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art and reduces the number of jigs to be used or eliminates the necessity in mounting the bracket, thereby improving the manufacturing efficiency and reducing the cost. It is an object of the present invention to provide a heat exchanger having a structure that can perform the heat treatment.

[0007]

According to the present invention, there is provided a header (3) having a header pipe (12) in which ends of a plurality of tubes (1) are connected to communicate with each other.
In the heat exchanger provided with, the header pipe
At the end of (12) , a plurality of slit-shaped cuts (16) (1) cut in a predetermined length in the axial direction from the end face of the peripheral wall.
6) is formed, and the cutting bracket is attached to the mounting bracket (7).
(16) (16)
2) The pipe engaging portion (20) provided with (22) is integrally formed.
And the insertion plate portion (22) (22) is
(16) By inserting it into the
When (7) is assembled to the header pipe (12),
And the header on the insertion plate portions (22) and (22).
The proximal end of the notch (16) (16) at the end of the pipe (12)
The lid (13) is fitted so as to close the portion, and the header
Ip (12), bracket (7) and lid (13)
By joining and integrating, the header pipe (12)
The gist of the present invention is a heat exchanger characterized in that the ends are sealed .

[0008]

In the above configuration, the bracket-side insertion plate portion is inserted into the cut-out portion on the header pipe side, and the bracket is mounted on the heat exchanger main body. The movement of the bracket is suppressed in a self-jig manner by the engaging action between the cut portion and the insertion plate portion. Therefore, by this action,
In addition, in combination with this operation, the bracket is joined and integrated with the heat exchanger body in a proper assembling arrangement. Also,
Since the cut portion is cut from the end of the peripheral wall of the header pipe, its processing is also easy.

[0009]

Next, an embodiment in which the present invention is applied to a method of mounting a bracket in 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 is applicable to various types of heat exchangers having a header, such as a heat exchanger for a room air conditioner and an oil cooler.

In the heat exchangers shown in FIGS. 2A and 3B, (1) is a flat tube,
(2) are corrugated fins, which are alternately arranged in parallel. (3) (3) is a pair of headers,
Both ends of the flat tube (1) are connected in communication. (4) is the refrigerant inlet pipe, and (5) is the outlet pipe. And (7) is a mounting bracket for mounting the heat exchanger body to the vehicle body at the upper part. (8)
(9) is a partition plate for partitioning the inside of the header (3). Incidentally, (10) and (10) are side plates for protecting the upper and lower outermost corrugated fins (2) and (2).

In each of the above heat exchanger constituent members, the flat tube (1) is made of an extruded aluminum member, and is internally divided into a plurality of chambers by partition walls as shown in FIG. The so-called harmonica tube with enhanced heat transfer performance. It should be noted that an electric resistance welded tube may be used instead of the extruded 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 raising a louver. This sheet material is an aluminum brazing sheet clad with a brazing material layer. Note that a normal aluminum sheet may be used instead of the brazing sheet.

The header (3) comprises a header pipe (12) and a lid (13) for closing an end of the pipe (12).

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

The lid (13) is externally fitted to the end of the header pipe (12) and fitted in a retaining state. In the case of an extruded tube, an inner fitting type lid may be used.

On the other hand, the mounting bracket (7) is formed by press-forming an aluminum plate, and as shown in FIGS. 1 and 2 (b), the mounting plate ( 18), a joining plate portion (19) along the outer peripheral surface of the header pipe (12), and a pipe engaging portion (20) arranged at an upper position thereof. The pipe engaging portion (20) is formed by projecting outward from both sides of the arc plate portion (21) and the arc plate portion (21) along the outer peripheral surface of the header pipe (12), and being bent in the middle. A pair of left and right insertion plate portions (22) and (22) formed so as to face inward each other, and as shown in FIG. 2 (b), the arc plate portion (21) is connected to the header pipe (12). The two insertion plates (22) and (22) are connected to the outer peripheral surface of the header pipe (12).
Are arranged in the cut portions (16) and (16).

In manufacturing the heat exchanger, first, the components of the heat exchanger are mutually assembled in a tentatively assembled state. That is, a plurality of flat tubes (1) are arranged side by side at predetermined intervals in the thickness direction, and both ends are inserted and fitted into the tube insertion holes (14) of the header pipes (12) and (12). At the same time, the corrugated fins (2) are inserted and arranged between the tubes (1). Also, the outermost fin (2)
The upper and lower side plates (10) and (10) are arranged outside of (2), and the inlet / outlet pipes (4) and (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 arranged in the header pipe (12) through a partition plate insertion hole (15) at the upper end of the pipe. Then, the both insertion plate portions (22) and (22) of the pipe engaging portion (20) of the mounting bracket (7) are inserted into the cut portions (16) and (16) from the end of the header pipe (12), And the above difference
Write plate portion (22) fitted to the cut portion to the end portion of the lid in position on the (22) (13) the pipe (12) (16) (16)
The base end is closed with the lid (13) .

In this assembled state, the mounting bracket (7) has its pipe engaging portion (20), its both insertion portions (22), (22) having both notches (16), (22) of the header pipe (12). 16) Being located inside the arc plate (21)
Is arranged along the outer peripheral surface of the header pipe (12), and the base end of the cutout (16) is closed by the lid (13). , Header (3).

Thereafter, the heat exchanger assembly is passed through a brazing furnace, and the whole is integrally joined by brazing. Thereby, it is manufactured in a heat exchanger.

As described above, assembling the bracket (7) without the jig as described above can improve the efficiency of the assembling work and contribute to a reduction in the manufacturing cost of the heat exchanger. What you can do, header pipe (12)
The cut-off portions (16), (16) and the lower portion of the cut-off portions (16), (16) are separated by the partition plate (9), so that the brazing portions between the cut-out portions (16), (16) and the insertion portions (22, 22) Refrigerant leakage due to poor mounting can be prevented by the partition plate (9). In particular, as shown in FIG. 1, a T-shaped partition plate having a band-shaped plate portion (9a) covering the outer peripheral surface of the header pipe (12) is used as the partition plate (9). , Its certainty is high.

In the present invention, the reliability of refrigerant leakage prevention is assured.
For, it is preferable to use a partition plate (9),
Seal the end of the header pipe (12) with the lid (13)
, The partition plate (9) may be omitted .

[0023]

As described above, the heat exchanger of the present invention has the following features.
At the end of the header pipe, there are formed a plurality of slit-shaped cuts cut in a predetermined length in the axial direction from the end surface of the peripheral wall, and the mounting bracket corresponds to the cuts.
Pipe engaging part with a plurality of insertion plate parts
Is formed, and the insertion plate portion is inserted into the cut portion.
By arranging the bracket, the header pipe
And on the insertion plate portion,
Busy instrument embodiment the base end portion of the cut portion to the end portion of the Ddapaipu
The lid is fitted to the header pipe, bracket and bracket.
The header and the lid are joined together
Because the end of the pipe is sealed, heat exchange
When assembling the container, insert the bracket
Insert and place it in the notch of the
And the bracket is circumferential and upward with respect to the header pipe
It can be assembled in a state where free movement in the downward direction is regulated.
Therefore, without using any other jig,
Make it function as a self jig by itself and make it a header pipe
It can be assembled, the work efficiency of the assembling work can be improved, and the production cost can be reduced. Moreover, as described above, since the cut portion is formed by cutting from the peripheral wall end surface of the header pipe in the length direction of the pipe, the processing is easy, and the manufacturing cost and the like are finally reduced. Can be contributed to.

Further, the insertion plate portion on the bracket side is connected to a header.
-A slit-like cut formed in the end of the pipe in the axial direction
Despite the fact that it is inserted into the
Fit the lid to the end of the header pipe on the plate
To close the base of the notch,
The end of the lid is completely sealed with the insertion plate and lid
Condition can be assured and the number of parts
Can be completed with the header attached firmly.
In this regard, it is possible to further reduce manufacturing costs.
Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a header pipe, a header lid, a mounting bracket and the like 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 line II of FIG.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tube 3 ... Header 7 ... Mounting bracket 12 ... Header pipe 13 ... Lid 16 ... Cut part 20 ... Pipe engaging part 22 ... Insertion part

Claims (1)

(57) [Claims] 1. A header having a header pipe (12) in which ends of a plurality of tubes (1) are connected in communication.
In the heat exchanger provided with (3), an end portion of the header pipe (12 ) is provided from an end surface of a peripheral wall thereof.
A plurality of slit-shaped cut portions (16) (16) cut in a predetermined length in the axial direction are formed, and the cut portions (16) (1 ) are formed in the mounting bracket (7).
Equipped with multiple insertion plate parts (22) and (22) corresponding to 6)
The pipe engaging portion (20) is integrally formed, and the insertion plate portions (22) (22) are connected to the cut portions (16) (1).
6) The bracket is inserted into the bracket
(7) is assembled to the header pipe (12), and the header pipe is mounted on the insertion plate portions (22) and (22).
Insert the base of the notch (16) (16) into the end of the
A lid (13) is fitted in the closing mode, and the header pipe (12), the bracket (7), and the lid
(13) are joined together and integrated into a header
A heat exchanger characterized in that an end of a pipe (12) is sealed .