JPH0735442A - Condenser - Google Patents

Abstract

PURPOSE:To set a brazing part between a side pate end and a header out of an air sealing range and further to stabilize a reference for a tube insertion positioning by a method wherein a plug closing a header end is arranged between a side plate insertion hole at least one end of the header and an adjoining heat exchanging tube insertion hole. CONSTITUTION:A header 1 is electrical seam pipe of a brazing sheet having brazing material at its both surfaces. A plug 2 is composed of a bare member, press fitted between a side plate insertion hole 3a of a header 1 and a tube insertion hole 5a, and then the plug 2 is air-tightly connected to the header 1 with brazing. Due to this fact, the end part of the side plate 3 inserted into the side plate insertion hole 3a and brazed to the header 1 is positioned above the plug 2 holding air-tightness, i.e., positioned out of an air-tightness range. Accordingly, the connected state at the connected part does not provide any influence against an air tightness of the condenser.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-flow type condenser applied to an air conditioner for automobiles.

[0002]

2. Description of the Related Art FIG. 3 is a vertical cross-sectional view of the vicinity of a header of a conventional multi-flow type condenser. In the figure, the conventional condenser is communicatively connected to a pair of headers 1 in a state in which tubes 5 and air-side fins 4 are alternately stacked and side plates 3 are arranged at both ends in the stacking direction.
Both ends of are molded by press working, and are closed by caps 7 having a portion that abuts the header end and the inner wall of the header.

[0003]

The above conventional condenser has the following problems to be solved.

That is, in the conventional condenser, since the end portion of the header is closed by the cap, the end portion of the side plate must be inserted into the closed header, and the end portion of the side plate and the header are separated from each other. There is a problem that the airtightness of the condenser is impaired due to poor brazing. In addition, when determining the insertion position of the tube or the like with the end of the header as a reference and assembling it, the contact between the header and the cap is unstable, so the reference deviates and there is a problem that the tube cannot be inserted into the header. It was Further, since the cap is brought into contact with the end surface of the header having no brazing material, the cap material uses a brazing material clad material, which causes a problem of high cost.

In order to solve the above problems, the present invention has an object to provide a condenser in which the brazing portion between the end portion of the side plate and the header is out of the airtight range and the positioning standard for inserting a tube or the like is stable. And

[0006]

As a means for solving the above problems, the present invention intends to provide a condenser described in the following (1) and (2).

(1) The heat exchange tubes and the air side fins are alternately laminated, and the heat exchange tube insertion holes and the side plate insertion holes are provided so as to face each other with the side plates arranged at both ends in the lamination direction. In a condenser which is connected to and communicates with a pair of headers, the header is fitted to the inner wall of the header between the side plate insertion hole at least one end of the header and the heat exchange tube insertion hole adjacent to the side plate insertion hole. A condenser comprising a plug which is press-fitted to close an end portion of a header.

(2) At least one drainage hole is provided through the header wall at a predetermined position on the header end side with respect to the plug press-fitting position. The described condenser.

[0009]

Since the present invention is constructed as described above, it has the following actions.

(1) In the structure of (1), the header inner wall is fitted between the side plate insertion hole at the end of the header and the heat exchange tube insertion hole adjacent to the side plate insertion hole. Since the plug is press-fitted to close the header end, the side plate insertion part is located outside the airtight plug, and the side plate end (insertion part) and the header are brazed to the condenser. There is no loss of airtightness.

Further, since a plug is provided, a cap is not required at the top of the header as in the conventional case. Therefore, the header top end is used as it is as a reference for inserting and positioning a tube or the like, so that the accuracy is increased and the tube is inserted as in the conventional case. There is no problem that the position is misaligned and the assemblability is impaired.

(2) In the above configuration (2), since the header wall is provided with a drain hole at a predetermined position on the header end side with respect to the plug press-fitting position in the header, the plug top Water does not collect in the.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals,
The description is omitted except when necessary.

FIG. 1 is a perspective view of an essential part of this embodiment, and FIG. 2 is FIG.
FIG. 4 is a view (longitudinal sectional view) in the vicinity of the AA arrow cross section of FIG.

In the figure, a header 1 is a brazing sheet ERW pipe in which a brazing material is clad on both sides, and 2 is a plug made of a bare material. The side plate insertion hole 3a and tube insertion hole 5a of the header 1 It is press-fitted between and, and like the tube 5, it is airtightly joined to the header 1 by brazing. Further above the installation position of the plug 2, the header 1
A drain hole 6 is provided through the wall of the header 1 in a size large enough to drain the water accumulated inside the upper end.

The other structure is similar to that of the conventional example, and the description thereof is omitted.

Next, the operation of the above configuration will be described. As shown in FIG. 2, since the plug 2 is fitted between the uppermost side plate insertion hole 3a of the header 1 and the tube insertion hole 5a and sealed by brazing, the plug 2 is inserted into the side plate insertion hole 3a. 1. The end of the side plate brazed with 1 is above the plug 2 for maintaining airtightness,
That is, it is located outside the airtight range, and the joint between the side plate end and the header 1 is irrelevant to the airtightness of the condenser. Therefore, the joining state of the joining portion does not affect the airtightness of the condenser as in the conventional case.

Further, since the plug 2 keeps the header 1 airtight, a cap is not required on the top of the header 1 as in the conventional case.

Further, since the drain hole 6 is provided close to the upper surface of the plug 2, water does not collect on the plug 2.

Further, when assembling the tube 5 and the like, the insertion and positioning work of the tube 5 with respect to the tube insertion hole 5a can be performed with reference to the top end of the header 1 without the cap, so that the accuracy is correspondingly increased, and the insertion is difficult. The problem of does not occur.

As described above, according to this embodiment, since the joint between the end of the side plate 3 and the header 1 is irrelevant to the airtightness of the condenser, the airtightness is good and the leakage trouble is extremely small. There is an advantage that a container is obtained.

Further, there is an advantage that a condenser having an excellent assembling workability can be obtained.

Further, the header 1 does not require a cap,
In addition, there is an advantage that a condenser can be obtained in which liquid such as water does not accumulate on the plug 2 in the header 1 even if it is capless.

[0024]

Since the present invention is constructed as described above, it has the following effects.

That is, according to the present invention, the plug serving as the header end closing member is press-fitted deeper than the side plate insertion hole, so that the brazing property between the side plate and the header is improved.
Since it does not need airtightness enough to satisfy the strength,
As a result, the airtightness failure rate of brazing is greatly reduced, and the productivity is improved. Further, since the cap that is in contact with the upper end of the header can be eliminated, the reference when inserting a tube or the like becomes the cut surface of the upper end of the header, and the assembling accuracy is improved, whereby the assembling work becomes efficient. Moreover, compared with the cap, the plug bare material can be used and the shape is simple, so that the cost can be reduced.

Further, by providing a water drain hole right above the plug plate press-fitting position of the header, it is possible to prevent the header and the plug from being corroded due to the accumulation of water during use.

[Brief description of drawings]

FIG. 1 is a perspective view of a condenser according to an embodiment of the present invention,

FIG. 2 is a view (longitudinal section) in the vicinity of a section taken along the line AA of FIG.

FIG. 3 is a vertical cross-sectional view corresponding to FIG. 2 of a conventional condenser.

[Explanation of symbols]

 1 Header 2 Plug 3 Side plate 3a Side plate insertion hole 4 Air side fin 5 Tube 5a Tube insertion hole 6 Drain hole

Claims (2)

[Claims] 1. Heat exchange tubes and fins on the air side are alternately laminated, and side plates are arranged at both ends in the stacking direction, and the heat exchange tubes and side plate insertion holes are provided so as to face each other. In a condenser, which is connected to a pair of headers and communicates with each other, a header inner wall is fitted between a side plate insertion hole of at least one end of the header and a heat exchange tube insertion hole adjacent to the side plate insertion hole. A condenser comprising a plug which is press-fitted and whose header end is closed. 2. The at least one drainage hole provided through the header wall at a predetermined position on the header end side with respect to the plug press-fitting position. Condenser.