JP2634982B2 - 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, a heat exchanger for a room air conditioner, and the like.

[0002]

2. Description of the Related Art For example, as a condenser for a car cooler,
In recent years, 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 a space between the tubes (1). A so-called multi-flow type heat exchanger having a basic structure in which fins (2) are arranged in gaps is preferably used as a device capable of realizing high heat exchange efficiency, low pressure loss and ultra-compactness. Tend to be.

[0003] Generally, the heat exchanger is manufactured by combining the heat exchanger components such as the tube (1), the header (3), and the fins (2) in a tentatively assembled state. This is performed by fabricating an assembly and joining and integrating these heat exchanger components together in a furnace by batch brazing.

[0004] By the way, connecting pipes (4) and (6) for the refrigerant inlet and outlet for allowing the refrigerant to flow through the internal passage of the heat exchanger communicate with the header (3) of the heat exchanger having the above configuration. The connection pipes (4) and (6) are connected at their distal ends with joint members (5) and (7) for pipe connection for forming a refrigerant circulation circuit together with a compressor and the like. . Then, the connection between the header (3) and the connection pipes (4) and (6), and the connection pipes (4) and (6) and the joint members (5) and (7)
The connection pipes (4) and (6) are assembled to the header (3), and the joint members (5) and (7) are connected to the connection pipe (4).
It is common to assemble (6) and, in this assembled state, join and integrate together by the above-described collective brazing.

[0005] Conventionally, assembling of the connecting pipe to the header and fitting of the joint member to the connecting pipe, as shown in FIG. 4, an insertion hole (3) formed in the peripheral wall of the header (3). 3e), the base end of the connecting pipe (6) is inserted and arranged, and the fitting hole (13) of the joint member (7) is fitted into the distal end of the connecting pipe (6). One bracket (51)
In (52), the connection pipe (6) and the joint member (7) are positioned by each.

[0006] Alternatively, as shown in FIG.
Bracket for fixing connection pipe (6) and joint member (7)
In some cases, the connection pipe (6) and the joint member (7) are assembled in a positioning state by using one bracket (53) integrated with a bracket that supports the joint.

[0007]

However, in each of the above-mentioned conventional structures, the connection pipe (6) and the joint member (7) are fixedly positioned by the brackets (51), (52), and (53), respectively. Therefore, there has been a disadvantage that the assembly structure and, consequently, the heat exchanger structure become complicated.

The present invention solves the above-mentioned conventional disadvantages, and has a simple structure for mounting the connecting pipe to the header and mounting the joint member to the connecting pipe. The purpose is to provide.

[0009]

According to the present invention, there is provided a hollow header to which a heat exchange tube is connected in a communicating state, wherein the header has a connection pipe for inlet and / or outlet of a heat exchange medium. Are connected in a communication state,
In the heat exchanger in which the joint member is attached to the distal end of the connection pipe, the base end of the connection pipe is inserted into the insertion hole provided in the header without being temporarily welded, and
Tip of the connecting pipe, is fitted placed into the fitting hole provided in the joint member, the joint member, is extended from the heat exchanger body, the temporary fixing welding to the heat exchanger body I don't care
It has a self-jigging structure and is attached and fixed to a bracket separate from the joint member , and then heat exchanges with the header and connecting pipe , connecting pipe and joint member , and bracket by brazing in that state
The gist of the present invention is a heat exchanger characterized in that the vessel body is integrally joined.

[0010]

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

In addition, the bracket is constructed separately from the joint member.
By being formed, the bracket is
Less prone to structural constraints and therefore unique to the bracket
Own of the bracket of the design can be subjected to the structural design
It has a high degree of freedom, which makes it difficult
Bracket with self-jig stop structure for heat exchanger body
Can be easily adopted.

[0012] Then, under the separate structure as described above,
The racket has a self-jigging structure that does not rely on temporary fixing welding
To the heat exchanger body by adopting
Not only makes it easier to assemble
As in the case of welding, the phase between the bracket and the heat exchanger body
Detrimental heat effects on the mutual mounting part, especially on the heat exchanger body
The heat exchanger is manufactured with good quality without any worries.
You.

Further, the base end of the connecting pipe is also provided on the header.
Inserted into the insertion hole without temporary welding.
The connection between the connection pipe and the header
No harmful thermal effects due to temporary welding
The heat exchanger is manufactured with better quality.

[0014]

Next, an embodiment in which the present invention is applied to a multi-flow type aluminum condenser for a car cooler will be described. The present invention is a heat exchanger for various applications such as a room air conditioner heat exchanger, an oil cooler, and a so-called serpentine type heat exchanger in which a tube is bent in a meandering shape 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.
(1) is a flat tube, (2) is a corrugated fin,
These are alternately arranged in the vertical direction in a parallel state.
(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. (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). (6) is a refrigerant outlet connection pipe, and (7) is a block-shaped joint member, which is attached to a distal end of the outlet connection pipe (6). A bracket (8) is used for assembling the outlet connection pipe (6) and the block-shaped joint member (7). In addition, (9) is a partition member, and a header (3) is provided so that the refrigerant flows in a meandering manner through the tube (1) group.
(3) The inside is partitioned at a predetermined height position. (Ten)
(10) is a side plate disposed 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. As shown in FIG. 2, the inside of the flat tube (1) is divided into a plurality of chambers by partition walls to improve the pressure resistance and the like. It is a harmonica tube. In addition,
An electric resistance welded tube may be used regardless of the extruded material.

The corrugated fin (2) is formed by cutting a louver by shaping a sheet material into a corrugated shape.
As this sheet material, an aluminum brazing sheet clad with a brazing material layer is used.

The headers (3) and (3) are cylindrical pipes formed by bending a single aluminum brazing sheet having a brazing material layer clad on one or both sides in a state in which both side edges are abutted. Header pipe (3a)
Open the upper and lower ends of the aluminum header cap (3
It is the one fitted in the external fitting state in b). Tube insertion holes (3c)... For inserting the end of the tube (1) are arranged in a row on the peripheral side of the header (3), and a slit hole (3d) for inserting the partition member (9) is also formed. Then, an insertion hole (3e) for inserting the base end of the inlet connection pipe (4) and the outlet connection pipe (5) is formed. In addition, an electric resistance welded pipe, an extruded pipe, or the like may be used as the header pipe (3a).

The outlet connection pipe (6) has a side view L
It is formed of an aluminum brazing material clad pipe having at least an outer surface clad with a brazing material layer. As this brazing 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) for fitting a distal end portion of the outlet connection pipe (6). . The fitting hole (13) is formed with a hole (13a) having an inner diameter corresponding to the outer diameter of the base end portion of the connection pipe (6) through the inner intermediate step, and a large diameter at the outlet side. An annular gap as a brazing material pool is formed on the outlet side in a state where the distal end of the connection pipe (6) is fitted into the fitting hole (13). It has been done. In addition, a screw hole (16) for screwing with the fastening member (15) is formed on the lower surface of the joint member (7) adjacent to the fitting hole (13). The upper surface (17) of the joint member (8) is also formed in a flat surface, and the front end of a hole connected to the fitting hole (13) is opened there. Is 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 includes an arc-shaped brazing plate (19) along the outer peripheral surface of the header (3) and the brazing. Self-jig stopper protruding from the inner side edge of the work plate (19) and locked to the tube (1)
A pair of upper and lower locking pieces (20) (20) constituting the structure ;
Fastening plate (21) protruding outward from the outer side edge of the brazing plate (19) and arranged along the screw hole (16) of the lower surface (12) of the joint member (7) And are integrally provided. The fastening plate (21) has a through hole (23) through which the fastening member (15) passes. In addition,
The bracket (8) is further integrally formed with a mounting plate (25) for mounting the heat exchanger body on a mounting side of a vehicle body or the like so as to protrude downward, and an insertion pin (26) is inserted into the plate (25). ) Is attached.

In the manufacture of the heat exchanger, first, the components of the heat exchanger are assembled in a tentatively assembled state. That is, as shown in FIGS. 1 and 2, a plurality of flat tubes (1) are arranged side by side at predetermined intervals in the thickness direction, and headers (3) (3) are provided at both ends thereof. Is inserted 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). In addition, a partition member (9),
Assemble the side plates (10), (10), the inlet connection pipe (4), and the connection pipe joint member (5).

At the same time, the base end of the outlet connection pipe (5) is inserted into the insertion hole (3e) of the header (3), and the joint member (8) is inserted into the front end of the outlet connection pipe (5). The bracket (8) is assembled by inserting the tip into the reduced diameter hole (13a) of the fitting hole (13), and the bracket (8) is engaged with the locking pieces (20) (20). Is fixed to the tube (1) in a temporarily fixed state in a predetermined manner, and the joint member (8) is screwed (16) concentrically with the through hole (23) of the bracket (8). Rotate in a predetermined direction so that the fastening member (15) passes through the hole (23)
Into the screw hole (16) of the joint member (7), and the joint member (7) is fastened and fixed to the bracket (8). This fastening not only positions the joint member (7), but also the joint member (7) and the header (3).
The connection pipe (6) between them also has a positioning action, and the connection pipe (6) is held in a fixed position in a fixed position without using a dedicated bracket.

Thereafter, the heat exchanger assembly is placed in a furnace, and flux brazing or vacuum brazing is performed, and the whole is integrally joined and integrated. By this brazing, the outlet connection pipe (6) is brazed to the header (3), the joint member (7) is brazed to the connection pipe (6) and the bracket (8), and further the bracket ( 8) is also brazed to the outer periphery of the header (3). In addition, the joint member (7) and the connection pipe (6) are tightly joined and integrated with good sealing properties by the brazing material stored in the brazing material pool formed therebetween. Thus, a heat exchanger is manufactured.

The mounting structure according to the present invention is applicable only to the inlet connection pipe (4) side, or to both the inlet connection pipe (4) side and the outlet connection pipe (6) side. It goes without saying that it may be applied. In addition, as the configuration of the joint member, in addition to the block shape type as in the above-described embodiment, various types of configuration members such as a flare joint type can be adopted.

[0026]

As described above, according to the heat exchanger structure of the present invention, since the joint member is attached and fixed to the bracket extending from the heat exchanger main body, the connection pipe is in the assembled state. Thus, at the same time, the positioning state or the substantially positioning state is maintained. Therefore, it is not necessary to use a special bracket for forming the connecting pipe or to form a special bracket part, and it is possible to simplify the mounting of the connecting pipe to the header and the mounting of the joint member to the connecting pipe. And the heat exchanger structure can be simplified.

Moreover, the bracket is constructed separately from the joint member.
The bracket is attached to the joint member
To the structural constraints of the
Bracket design with unique structural design
The degree of freedom of
Bracket for self-jig stop structure for difficult heat exchanger body
It can be easily adopted in the kit.

Then, under the separate structure as described above,
The racket has a self-jigging structure that does not rely on temporary fixing welding
Is used, so the bra
Not only is it easy to assemble the bracket, but also
Mutual mounting of bracket and heat exchanger body as if
Harmful heat to the heat sink, especially to the heat exchanger body.
Produce heat exchangers of good quality without any worries
Can be.

Further, the base end of the connection pipe is also provided on the header.
Inserted into the insertion hole without temporary welding.
The connection between the connection pipe and the header is temporarily
No harmful heat effects due to stop welding
A better quality heat exchanger can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an assembling structure of a connecting 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. 3A is an overall front view of the heat exchanger, and FIG. 3B is a side view thereof.

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

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

[Explanation of symbols]

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

Claims (1)

(57) [Claims] 1. A hollow header to which a heat exchange tube is connected in a communication state, wherein a connection pipe for an inlet and / or an outlet of a heat exchange medium is connected to the header in a communication state, and the connection pipe is connected to the header. In a heat exchanger in which a joint member is attached to a distal end of the heat exchanger, a base end of the connection pipe is inserted into an insertion hole provided in a header.
While being inserted and disposed without using the temporary fixing welding, the distal end of the connection pipe was fitted and disposed in the fitting hole provided in the joint member, and the joint member was extended from the heat exchanger body. ,
Self-jig to the heat exchanger body without temporary fixing welding
It is a fixing structure and attached and fixed to a bracket separate from the joint member, and in this state, the header and the connecting pipe by brazing ,
A heat exchanger wherein a connecting pipe and a joint member , and a bracket and a heat exchanger body are joined and integrated.