JPH05149691A - Heat exchanger - Google Patents

Abstract

PURPOSE:To simplify an assemblying of a connector pipe by a method wherein one end of the connector pipe is inserted into an insertion hole of a header, the other end of the connector pipe is fitted to a fitting hole of a coupler member, the coupler member is fixed to a bracket at a heat exchanger and both ends of the connector pipe are brazed and connected. CONSTITUTION:A connector pipe 6 for a refrigerant outlet is connected such that its one end is inserted into an insertion hole 3e of a header 3 and the other end is fitted to a fitting hole 13 of a coupler member 7. An engaging piece 20 of a bracket 8 is engaged with a flat tube 1 to assemble the bracket 8, a fastening member 15 is threadably engaged with a threaded hole 16 of the coupler member 7 through the through-pass hole 23 and then the coupler member 7 is fixed to the bracket 8. In this way, after the position of the coupler member 7 is set, the connector pipe 6 and the header 3 are fixed by brazing and also the connector pipe 6 and the coupler member 7 are fixed by brazing, respectively.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art For example, as a condenser for a car cooler,
Recently, for example, as shown in FIG. 3, both ends of a plurality of tubes (1) are connected to a pair of hollow headers (3) (3) in a communicating state, and the tubes (1) ... A so-called multi-flow type heat exchanger having a basic structure in which fins (2) are arranged in a gap is preferably used as a heat exchanger capable of achieving high heat exchange efficiency, low pressure loss and ultra compactness. Tend to

This heat exchanger is generally manufactured by combining the heat exchanger constituent members such as the tube (1), the header (3) and the fins (2) as described above in a mutually temporary assembled state. This is carried out by manufacturing an assembly and integrally joining these heat exchanger constituent members together by brazing in a furnace.

By the way, connecting pipes (4) and (6) for the refrigerant inlet and outlet for communicating the refrigerant to the internal passages of the heat exchanger are communicated with the header (3) of the heat exchanger having the above structure. Connected to each other, and joint members (5) and (7) for connecting pipes for forming a refrigerant circulation circuit together with a compressor are attached to the tip ends of the connection pipes (4) and (6). .. Then, the header (3) is joined to the connecting pipes (4) and (6), and the connecting pipes (4) and (6) and the joint members (5) and (7).
For connection with, the connecting pipes (4) and (6) are assembled to the header (3), and the joint members (5) and (7) are connected to the connecting pipe (4).
It is general to assemble in (6), and in this assembled state, integrally join together by the above-mentioned collective brazing.

Conventionally, assembling the connecting pipe to the header and assembling the joint member to the connecting pipe, as shown in FIG. 4, has an insertion hole () formed in the peripheral wall of the header (3). The base end portion of the connecting pipe (6) is inserted and arranged in 3e), the fitting hole portion (13) of the joint member (7) is fitted into the distal end portion of the connecting pipe (6), and 2 Brackets (51)
This was done by positioning the connecting pipe (6) and the joint member (7) at (52).

Alternatively, as shown in FIG.
A bracket for fixing the connecting pipe (6) and a joint member (7)
In some cases, the connection pipe (6) and the joint member (7) are assembled in a positioned state by using one bracket (53) that is integrated with a bracket that supports the.

[0007]

However, in any of the conventional structures described above, the connecting pipe (6) and the joint member (7) are individually fixed and positioned by the brackets (51) (52) (53). Therefore, there is a drawback that the assembly structure, and eventually the heat exchanger structure, becomes complicated.

The present invention eliminates the above-mentioned conventional drawbacks, and a heat exchanger having a structure capable of assembling the connecting pipe to the header and the joint member to the connecting pipe with a simple structure. The purpose is to provide.

[0009]

For the above object, the present invention comprises a hollow header to which heat exchange tubes are connected in a communicating state, and the header has a connection pipe for heat exchange medium inlet and / or outlet. Is connected to the communication state,
In the heat exchanger in which the joint member is attached to the tip of the connection pipe, the base end of the connection pipe is inserted and arranged in the insertion hole provided in the header, and the tip of the connection pipe is
The fitting member is arranged in a fitting hole provided in the fitting member, and the fitting member is fixed to the bracket extended from the heat exchanger body, and in that state, the header and the connecting pipe are brazed,
Also, the gist is a heat exchanger characterized in that the connection pipe and the joint member are joined and integrated.

[0010]

In the above structure, since the joint member is fixed to the bracket extended from the heat exchanger main body, the joint member is fixed by the bracket and the fixed joint member and the header are fixed. By the action, the connecting pipe is also maintained in the positioned state or the substantially positioned state without using the dedicated bracket. Therefore, the structure for assembling the connecting pipe and the joint member, that is, the structure for the heat exchanger is simplified.

[0011]

EXAMPLES Next, examples in which the present invention is applied to a multi-flow type aluminum condenser for a car cooler will be described. The present invention relates to heat exchangers for various uses such as heat exchangers for room air conditioners and oil coolers, and so-called serpentine type heat exchangers in which tubes are meandered to form a heat exchanger core. It goes without saying that it can be widely applied to various types of heat exchangers.

In the heat exchanger shown in FIG. 3,
(1) is a flat tube, (2) is a corrugated fin,
These are arranged in parallel in the vertical direction alternately.
(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. Reference numeral (4) is a refrigerant inlet connection pipe, and (5) is a flare type joint member, which is attached to the tip of the inlet connection pipe (4). Further, (6) is a refrigerant outlet connection pipe, and (7) is a block-shaped joint member, which is attached to the tip of the outlet connection pipe (6). Reference numeral (8) is a bracket which is used for assembling the outlet connecting pipe (6) and the block-shaped joint member (7). In addition, (9) is a partition member, and the header (3) is arranged so that the refrigerant circulates in the tube (1) group in a meandering manner.
(3) The inside is partitioned at a predetermined height position. (Ten)
Reference numeral (10) is a side plate, which is arranged outside the upper and lower outermost corrugated fins (2) and (2) to protect them.

The flat tube (1) is made of an extruded aluminum material, and as shown in FIG. 2, the interior is divided into a plurality of chambers by partition walls to improve pressure resistance and so on. It is a harmonica tube. In addition,
An electric resistance welded pipe may be used regardless of the extrusion mold material.

The corrugated fin (2) is formed by forming a sheet material into a corrugated shape and cutting and raising the louver.
An aluminum brazing sheet in which a brazing material layer is clad is used as this sheet material.

The headers (3) and (3) have a cylindrical shape which is formed into a pipe shape by bending one aluminum brazing sheet having a brazing material layer clad on one side or both sides into a state where both side edges are butted. Header pipe (3a)
Open the top and bottom openings of the aluminum header cap (3
It was closed in b) in the external fitting state. On the peripheral side of the header (3), tube insertion holes (3c) for inserting the ends of the tube (1) are arranged in rows, and a slit hole (3d) for inserting the partition member (9) is also formed. Then, an insertion hole (3e) for inserting the base end portions of the inlet connection pipe (4) and the outlet connection pipe (5) is formed. As the header pipe (3a), an electric resistance welded pipe, an extruded pipe or the like may be used.

The outlet connecting pipe (6) is seen from a side view L.
It is formed by a brazing filler metal pipe made of aluminum in which the brazing filler metal layer is clad at least on the outer surface. For this brazing material clad pipe,
For example, an electric resistance welded tube made of an aluminum brazing sheet is preferably used.

The outlet joint member (7) has a lower surface (12).
Is made of a flat aluminum block material having a predetermined shape, and the lower surface (12) is provided with a fitting hole (13) into which the tip of the outlet connecting pipe (6) is fitted. .. The fitting hole portion (13) is formed in the hole portion (13a) having an inner diameter corresponding to the outer diameter of the base end portion of the connecting pipe (6) through the inner intermediate step portion, and the outlet side has a large diameter. So that an annular gap as a brazing filler metal reservoir is formed on the outlet side with the tip of the connecting pipe (6) fitted in the fitting hole (13). Has been done. Further, a screw hole (16) is formed on the lower surface of the joint member (7) adjacent to the fitting hole portion (13) and screwed with the fastening member (15). In addition, the upper surface (17) of the joint member (8) is also formed into a flat surface, and the tip of the hole portion continuously provided to the fitting hole portion (13) is opened therein, and the tip joint portion of the external pipe (not shown) is formed. Are supposed to be connected.

The bracket (8) is a molded product of an aluminum brazing sheet in which a brazing material layer is clad on both sides, and an arc-shaped brazing plate portion (19) along the outer peripheral surface of the header (3) and the brazing. A pair of upper and lower locking pieces (20) (20) protruding from the inner side edge of the plate (19) and locked to the tube (1) and the outside of the brazing plate (19) The lower surface (12) of the joint member (7) protruding outward from the side edge portion
The fastening plate (2) arranged along the screw hole (16) of
It is said that 1) and are integrated. Then, through holes (23) for passing the fastening member (15) through the fastening plate portion (21).
Are formed. The bracket (8) is further integrally formed with a mounting plate portion (25) for mounting the heat exchanger main body on the mounting side of the vehicle body or the like so as to project downward.
An insertion pin (26) is attached to the plate portion (25).

In manufacturing the heat exchanger, first, the respective heat exchanger constituent members are assembled in a temporarily assembled state. That is, as shown in FIGS. 1 and 2, a plurality of flat tubes (1) are arranged in parallel in the thickness direction at predetermined intervals, and headers (3) (3) are provided at both ends thereof. Is fitted by inserting the end of the tube (1) into the tube insertion hole (3c), and the corrugated fin (2) is inserted and arranged between the tubes (1). Other, partition member (9),
The side plates (10) (10), the inlet connecting pipe (4), and the connecting pipe joint member (5) are assembled.

At the same time, the base end portion of the outlet connection pipe (5) is inserted into the insertion hole (3e) of the header (3), and the joint member (8) is attached to the tip end portion of the outlet connection pipe (5). Are inserted into the reduced diameter hole portion (13a) of the fitting hole portion (13) to combine the bracket (8) with the locking piece portions (20) (20). Is assembled in a predetermined manner by engaging the tube with the tube (1), and the joint member (8) is so arranged that its screw hole (16) is concentric with the through hole (23) of the bracket (8). Rotate in the specified direction,
In that state, the fastening member (15) is screwed into the threaded hole (16) of the joint member (7) through the through hole (23) to form the joint member (7).
Is fastened and fixed to the bracket (8). By this conclusion,
The joint member (7) is not only positioned, but also the connecting pipe (6) between the joint member (7) and the header (3) has a positioning action, and the connecting pipe (6) is dedicated. It is held in place and in place without the use of brackets.

After that, the heat exchanger assembly is put in a furnace and flux brazing or vacuum brazing is performed to integrally bond the whole body together. By this brazing, the outlet connecting pipe (6) is brazed to the header (3), the joint member (7) is brazed to the connecting pipe (6) and the bracket (8), and further the bracket ( 8) is also brazed to the outer periphery of the header (3). The joint member (7) and the connection pipe (6) are firmly joined and integrated with good sealing property by the brazing material accumulated in the brazing material reservoir formed between them. From the above, a heat exchanger is manufactured.

The assembling structure of the present invention is applied only to the inlet connecting pipe (4) side or to both the inlet connecting pipe (4) side and the outlet connecting pipe (6) side. Needless to say, it may be applied. Further, as the constitutional aspect of the joint member, a joint member having various constitutional aspects such as a flare joint type in addition to the block shape type as in the above-described embodiment can be adopted.

[0023]

As described above, according to the heat exchanger structure of the present invention, since the joint member is fixed to the bracket extended from the heat exchanger body, in the assembled state,
As a result, the connecting pipe is simultaneously held in the positioned state or the substantially positioned state. Therefore, use of a dedicated bracket for assembling the connecting pipe or formation of a dedicated bracket portion can be made unnecessary, and the assembling of the connecting pipe to the header and the assembling of the joint member to the connecting pipe can be simplified. It can be realized with a simple structure, and further, the heat exchanger structure can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing an assembly structure of a connection pipe and a joint member.

FIG. 2 is a perspective view showing a connection pipe, a joint member, a bracket and the like in a separated state.

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

FIG. 4 is a perspective view showing a conventional assembly structure of a connecting pipe and a joint member.

FIG. 5 is a perspective view showing another conventional assembly structure of a connecting pipe and a joint member.

[Explanation of symbols]

 1 ... Flat tube (heat exchange tube) 3 ... Header 3e ... Insertion hole 6 ... Refrigerant outlet connection pipe 7 ... Joint member 8 ... Bracket 13 ... Fitting hole portion 15 ... Fastening member

Claims (1)

[Claims] 1. A hollow header having heat exchange tubes connected in communication with each other, wherein connection pipes for heat exchange medium inlet and / or outlet are connected in communication with the header and the connection pipes are connected. In the heat exchanger in which the joint member is attached to the tip end portion of the connection pipe, the base end portion of the connection pipe is inserted and arranged in the insertion hole provided in the header, and the tip end portion of the connection pipe is provided in the joint member. The fitting member is fixedly mounted on the bracket extended from the heat exchanger body, and the header and the connecting pipe and the connecting pipe and the fitting member are integrally joined by brazing in that state. A heat exchanger characterized by being formed.