JPH07190672A - Heat exchanger - Google Patents

Abstract

(57) [Abstract] [Structure] The engaging projections 15 are provided on the peripheral wall of the pipe 7 of the flange coupling type joint member 4, and the holes 12, 18 of the joint member main body 6, the pedestal member 5 and the header 2, 20 are provided with engaging groove portions 14, 19, 21 and the engaging protruding portion 15 is assembled in a state of being engaged with the groove portions 14, 19, 21. [Effect] It becomes unnecessary to use a jig for restricting the rotation of the flange coupling type joint member 4, and the brazing work of the heat exchanger can be efficiently performed.

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 as a condenser for car coolers, a heat exchanger for room air conditioners and the like.

[0002]

2. Description of the Related Art Recently, as a condenser for a car cooler, for example, a heat exchanger made of aluminum as shown in FIG. 11 tends to be used. In this heat exchanger, a pair of hollow headers (2) and (2) are connected to both ends of a plurality of flat tubes (1) ... And fins (3) are arranged in the pipe, and the joint members (51) (56) on the refrigerant inlet side and the outlet side that connect the external pipe are connected to the headers (2) and (2) in a communicating state. Then, the whole is joined and integrated by collective brazing.

Recently, as a joint member (51) for connecting an external pipe, a flange coupling type joint member (51) as shown in FIGS. 12 and 13 may be adopted, and moreover, It may be necessary to attach the joint member (51) directly to the header (2).

In order to attach the flange coupling type joint member (51) to the header (2) in such a direct attachment state, conventionally, a short pipe (53) for connection to the joint member body (52) is used.
And a pedestal member (54) having a fitting surface (54a) formed along the outer peripheral surface of the header (2).
Is used, the pipe (53) of the joint member (51) is inserted and arranged in the pipe insertion hole (55) of the header (2) while being passed through the pedestal member (54), and the pedestal member (54 ) Is fitted to the outer peripheral surface of the header (2), and in the assembled state, the joint member (51) and the header (2) are joined and integrated by brazing. Was adopted.

[0005]

However, in the above-described mounting structure, the joint member (51) is weakly restrained around the axis of the pipe (53) in the assembled state before brazing. , There is a high risk of rotational displacement around the axis of the pipe (53), and therefore the joint member (51)
In order to hold and braze the header to the header (2) in an appropriate direction, a positioning jig is used separately, and the joint member (51) is positioned in the rotation-restricted state by the jig. I had to braze. Therefore, not only positioning work of the joint member (51) by a jig is required at the time of brazing, but also removal work of the jig is required after brazing, which requires much labor. .

In view of the above-mentioned conventional problems, the present invention directly attaches the joint member to the header in a state where the pipe provided in the flange coupling joint member is inserted into the pipe insertion hole of the header. In a heat exchanger of the type that is connected by brazing, the rotational displacement of the joint member around the pipe before brazing can be regulated without using a jig, and the efficiency of brazing work can be improved. An object of the present invention is to provide a heat exchanger having a structure that can be achieved.

[0007]

To achieve the above object, the present invention is provided with a hollow header in which ends of a plurality of tubes for heat exchange are connected in a communicating state, and a flange coupling to which an external pipe is connected. Type coupling member is provided,
The joint member is provided with a pipe for connecting the same to the inside of the header, the pipe of the joint member is inserted and fitted into a pipe insertion hole provided in the peripheral wall of the header, and the joint member and the header are brazed together. In a heat exchanger integrated in a direct-attached form, a heat exchanger characterized by comprising rotation restricting means for restricting a rotational displacement of a joint member around a pipe axis before brazing. To do.

[0008]

In the above heat exchanger, the heat exchanger itself is provided with the rotation restricting means for restricting the rotational displacement of the joint member around the axis of the pipe before brazing, so that the joint member can be properly operated. Not only is it brazed to the header in the orientation, but also the use of a jig for rotation restriction is not necessary, and the brazing work can be performed efficiently.

[0009]

EXAMPLES Examples of the heat exchanger according to the present invention will be described below. As the heat exchanger, as long as it is a heat exchanger having a structure in which the ends of a plurality of tubes for heat exchange are communicated with the hollow header, other than that, both structurally and for the use of the heat exchanger. There are no special restrictions. Further, the heat exchange medium flowing through the heat exchanger is not limited to the refrigerant for air conditioning,
Various heat exchanger media such as water, oil may be used.

The heat exchangers of the respective embodiments described below have a common basic structure as shown in FIG. 11, except for the connecting structure of the joint member to the header.

That is, in the heat exchanger of the embodiment, the porous tubes made of aluminum are used as the flat tubes (1) .... Further, as the headers (2) and (2), the aluminum brazing sheet is bent in a pipe shape in a state of abutting the side edges, and both end openings of the header pipe (2a) are closed by the aluminum lids (2b) and (2b). Is used. A corrugated fin formed by bending an aluminum brazing sheet into a corrugated shape is used as the fin (3). The ends of the tubes (1) are inserted into the circumferential slit-shaped tube insertion holes (2c) provided in the peripheral side walls of the headers (2) and (2), and the tubes (1) are arranged. Are assembled in a state where corrugated fins (3) are arranged between the heat exchanger constituent members and the header pipe (2) by collective brazing in the assembled state.
The side abutting parts of a) are joined and integrated.

The tube (1) ... and the header (2)
Needless to say, the basic structure described above is merely an example for explaining the embodiments, such as the case where an electric resistance welded pipe made of aluminum is used as (2).

Next, embodiments of the connecting structure portion of the flange coupling type joint member to the header (2) will be sequentially described.

1 and 2 showing the first embodiment,
(4) is a joint member, and (5) is a base member. The joint member (4) is a flange coupling type joint member, (6) is a joint member main body, and (7) is a pipe.

The joint member body (6) is in the form of a block block made of aluminum and has a flat flange coupling surface (8) for connecting an external pipe. The flange coupling surface (8) is provided with a screw hole (9) on one side for screwing a flange coupling type joint on the external pipe side, and a port to which the external pipe is communicated and connected on the other side. (10) is provided. This port (10) is a circular pipe fitting provided on the other surface different from the flange coupling surface (8), in the illustrated embodiment, through the internal passage (11) of the joint member (4), which is the opposite surface in the illustrated embodiment. It communicates with the hole (12).

At a predetermined position in the circumferential direction of the peripheral wall surrounding the pipe fitting hole portion (12), a single member extending inward in the hole axial direction from the opening portion of the hole (12). A combined recessed section (14) is provided.

The pipe (7) is, for example, a short aluminum pipe in which a brazing material is clad, and is provided at a predetermined position in the circumferential direction of the peripheral wall of the pipe (7) with an outwardly projecting engaging projection (1).
5) is formed over the entire length. And
The pipe (7) and the joint member body (6) are the pipe (7).
One end of the pipe (7) by inserting the engaging projection (15) into the engaging recess (14) of the pipe fitting hole (12) of the joint member body (6). Is fitted into the pipe fitting hole (12) of the joint member body (6), whereby the engaging concave ridges (14) and the convex ridges (15) are circumferentially engaged with each other. Combined in a non-rotatable state.

Reference numeral (22) is a raised portion, which is integrally formed with the joint member body (6) to ensure the joint between the joint member body (6) and the pedestal member (5). is there.

On the other hand, the pedestal member (5) is a member such as a forged product made of aluminum or a brazing material clad aluminum material having a predetermined thickness, and one surface thereof is the header (2).
Corresponding to the outer peripheral surface of the fitting concave surface (17), which is an arcuate curved surface in the illustrated embodiment. A circular through hole (18) for penetrating the pipe (7) in the fitted state is formed in the pedestal member (5), and the pipe through hole (1
This hole (18) is provided at a predetermined position in the circumferential direction of the surrounding wall that surrounds 8).
One engaging groove (19) extending from the opening to the entire length in the axial direction of the hole is provided. This engaging groove (1
9) is formed such that the engaging projection (15) of the pipe (7) is arranged inside.

In the present embodiment, the circular pipe insertion hole (20) provided in the header (2) is also provided at a predetermined position in the circumferential direction of the peripheral wall surrounding the pipe insertion hole (20). One engaging groove (21) extending from the opening of (20) to the entire length in the axial direction of the hole is provided, and this engaging groove (21) also has an engaging protrusion of the pipe (7). It is formed so that the strips (15) are arranged.

The joint member (4), the pedestal member (5) and the header (2) are combined with each other in the process of assembling the heat exchanger constituent members. That is, the pipe (7) of the joint member (4) is connected to the through hole (1) of the pedestal member (5).
8) In a mode in which the engaging protrusion (15) is arranged in the engaging recess (19), the engaging protrusion (15) is penetrated, and the fitting surface (17) of the pedestal member (5) is further attached to the header (2). Of fitting the outer peripheral surface of the pipe (7) in the pipe insertion hole (20) of the header (2) and the engaging projection (15) in the engaging recess (21) At, insert.

In this assembled state, the joint member main body (6) and the pipe (7) are provided with the engaging ridges (1) for engaging them.
4) Relative rotation is restricted by the engagement of (15) with each other in the circumferential direction, and the pipe (7) and the pedestal member (5) are circumferential with respect to their engaging concave-convex ribs (15) (19). The relative rotation is regulated by the engagement in the above, and the relative rotation is regulated by the fitting concave surface (17) between the pedestal member (5) and the header (2) and the outer peripheral surface of the header (2). In addition, the relative rotation of the pipe (7) and the pipe insertion hole (20) of the header (2) is restricted by the engagement of the engaging ridges (15) (21) with each other in the circumferential direction. The joint member (4) is attached to the header (2) in a rotation-restricted state around the pipe axis.

The joint member (4), the pedestal member (5) and the header thus assembled are collectively brazed at the time of collectively brazing the heat exchanger assembly,
Joined and integrated.

Therefore, in the heat exchanger of the above embodiment, it is not necessary to use an assembling jig for restricting the rotation of the joint member (4) in the assembled state, and the brazing work can be efficiently performed. it can.

[0025] Note that, in the joint member (4), the pipe and its body (6) and the pipe (7) may be one which is integrated by press fitting specifications, in which case, the body (6) ( the 7), more relative rotation is restricted rather pressure input or the like than by recess-projection engaging above, therefore, the body (6)
The fitting between the pipe and the pipe (7) may be performed in a mode that does not depend on the concave and convex engagement.

Further, in the above-mentioned embodiment, the engaging groove portion (21) is provided in the pipe insertion hole (20) of the header (2), but even if it is omitted, sufficient rotation regulation is possible. Is.

FIG. 3 shows a modification of the first embodiment. In this modified example, the pipe (7) is a molded product (23) (23), such as an aluminum brazing sheet, which is formed into a hat-shaped cross section, and has projecting plate portions (23a) (23a) on both sides of the molded product (23) (23).
(23a) and (23a) are arranged in a superposed state, and the side projecting plate portions (23a) (23a), (23a) (23
In a), two engaging ridges (15) and (15) are formed in the circumferential direction. Correspondingly, 2 is inserted into the pipe fitting hole (12) of the joint member body (6).
Two engaging groove portions (14) (14) are provided, and two engaging groove portions (19) (19) are also provided in the through hole (18) of the pedestal member (5). The pipe insertion hole (20) of (2) is also provided with two engaging groove portions (21) (21). As described above, the engaging protrusions (15) may be formed by superposing the plates (23a) (23a), (23a) (23a) on each other, and the engaging protrusions (15) ) Or the engaging recesses (14) (19) (21) may be provided in a plural number.

FIG. 4 shows still another modification. In this modified example, the engaging groove portion (24) is provided on the pipe (7), the pipe fitting hole portion (12) of the joint member body (6) and the pipe through hole (18) of the pedestal member (5) are provided. , And the pipe insertion hole (20) of the header (2) are provided with engaging projections (25), (26) and (27), respectively.
Thus, the unevenness may be formed in reverse.

FIG. 5 shows a second embodiment. In the embodiment, (4) is a joint member and (28) is a pedestal stay.

In the joint member (4), the joint member main body (6) and the circular pipe (7) are integrated by press fitting or the like.
Alternatively, although not shown, these may be integrally molded. The joint member body (6) has a flat engaging side surface (2) for rotation restriction, which is orthogonal to the flange coupling surface (8).
9) has been formed.

The pedestal stay (28) is made by cutting an aluminum extruded mold material into a predetermined length unit,
(30) is a pedestal, and (31) is a rotation restricting piece. The pedestal part (30) has a circular pipe through hole (18) that allows the pipe (7) to pass therethrough in a conforming state, and also has a header surrounding part (32) integrally in an extended state, so that the header (2) It is formed so as to surround the outer peripheral surface over more than half the circumference.
A tip portion (32a) of the header surrounding portion (32) is formed so as to abut against a side edge portion of the tube (1), and a stay (28) is fitted to the outer peripheral portion of the header (2). With the
The rotation of the stay (28) around the header (2) is restricted. The rotation restricting piece (31) is provided on one side of the pedestal (30) so as to project outward, and the inner surface thereof is
It is formed on a flat engaging side surface (31a) which engages with the engaging side surface (29) of the joint member body (6).

The header (2) is provided with a circular pipe insertion hole (20).

In assembly, the pedestal portion (30) and the header surrounding portion (32) of the stay (28) are attached to the header (2).
The tip end (32a) of the header surrounding portion (32) is brought into contact with the tube (1) by fitting the pipe through hole (18) of the pedestal portion (30) and the header (2). The pipe insertion hole (20) of () is automatically aligned, and the pipe (7) of the joint member (4) is inserted into the aligned holes (18) (20). Then, at the time of this insertion, the engaging side surface (29) of the joint member main body (6) is connected to the engaging side surface (31a) of the rotation restricting piece (31) of the stay (28).
).

In the assembled state obtained as described above, the joint member (4) and the stay (28) are used for engaging the engagement side surface (29) of the joint member main body (6) and the stay (28). Due to the engagement with the side surface (31a), the pipe (7) of the joint member (4) is prevented from rotating relative to the stay (2).
The fitting member (4) is rotated around the axis of the pipe (7) by being fitted in the pipe through hole (18) of 8) and the pipe insertion hole (20) of the header (2). The displacement is regulated, and the header (2) is assembled in a self-jig state. After that, these are joined and integrated together with the collective brazing of the heat exchanger assembly.

Also in the case of the structure of this embodiment, the joint member (4) can be assembled into the heat exchanger assembly in a rotation-restricted state by itself without using a brazing jig, so that the brazing work can be performed efficiently. Can be carried out.

Further, in the above embodiment, the tip (32a) of the header surrounding portion (32) is brought into contact with the tube (1), so that the pipe through hole (18) of the stay (28) and the header (28). Since the pipe insertion hole (20) of 2) is automatically aligned, the assembling work becomes very easy.

FIG. 6 shows a modification of the second embodiment. In this embodiment, the header (2) is shortened by reducing the extension length of the header surrounding portion (32) from the pedestal portion (30) of the stay (28) or omitting the header surrounding portion (32). Is surrounded by the pedestal part (30) within a range not exceeding half a circumference. With such a configuration,
The joint member (4) and the stay (28) include an engaging side surface (29) of the joint member (4) and an engaging side surface (31a) of the stay (28).
And the pipe (7) of the joint member (4) becomes the pipe through hole (18) of the stay (28) and the pipe insertion hole (20) of the header (2). And the fitting concave surface (17) of the pedestal portion (30) and the outer peripheral surface of the header (2) are also fitted together, so that the joint member (4) is connected to the pipe (7). Rotational displacement around the axis is restricted and the header (2) is assembled in a self-jig state.

A third embodiment is shown in FIGS. 7 and 8. In this embodiment, as the pedestal member (5), a press-integrated molded product obtained by press-molding an aluminum plate or an aluminum brazing sheet is used. That is, the central flat plate portion (35) is provided with a circular pipe through hole (18), and steps (36) and (36) are inwardly extended from both side edges of the central flat plate portion (35). In addition, the side plate portions (37) (37) having a shape along the outer peripheral surface of the header (2), which are arcuate in the illustrated embodiment, are connected integrally with this. Further, rising rotation restricting ribs (38) and (38) are provided to be connected to both edges of the central flat plate portion (35).

The joint member main body (6) has side surface portions (39) (39) facing opposite sides.

In assembly, the pipe (7) of the joint member (4) is passed through the pipe through hole (18) of the pedestal member (5), and the joint members main body (6) is attached to the ribs (38) (38).
Side portions (39) (39) of the pedestal member (5) are supported, and the pipe (7) is further inserted into the pipe insertion hole (20) of the header (2). Fit the 37) on the outer peripheral surface of the header (2).

In the assembled state obtained as described above, the joint member (4) and the pedestal member (5) are the side surface portions (39) (39) of the joint member (4) and the pedestal member (5). The relative rotation is restricted by the engagement with the ribs (38) (38) of the joint member (4), and the pipe (7) of the joint member (4) is connected to the pipe through hole (18) of the pedestal member (5) and the header (2). ) Of the pedestal member (5) is fitted into the pipe insertion hole (20) of the base member (5) and the side plate portions (37) and (37) of the pedestal member (5) are fitted to the outer peripheral surface of the header (2). Joint member (4)
Is restricted in rotational displacement about the axis of the pipe (7),
It is assembled to the header (2) in a self-jig state.

Also in the case of the structure of this embodiment, the joint member (4) can be assembled into the heat exchanger assembly in a rotation-restricted state by itself without using a brazing jig, so that the brazing work can be performed efficiently. Can be carried out.

Further, in this embodiment, since the pedestal member (5) is formed by press-molding a plate, the side plate portions (37) (37) are extended in the circumferential direction of the header (2), etc. As a result, it is possible to easily secure a large bonding area and also to easily form the rotation restricting ribs (38) (38).

9 and 10 show a fourth embodiment.
In the embodiment, (41) is a filler, and the joint member main body (6) and the pipe (7) are separately formed. Further, the filler (41) is made of a sheet material made of aluminum brazing material or the like, and is molded to have an arc-shaped header fitting surface (42) along the outer peripheral surface of the header (2). At the same time, a cylindrical intervening cylinder portion (43) arranged between the pipe (7) and the pipe fitting hole portion (12) of the joint member main body portion (6) is formed. Then, in a state where the cylindrical interposition cylinder part (43) is arranged in the pipe fitting hole part (12) of the joint member main body (6), the pipe (7)
One end side of the pipe fitting hole (1
The joint member main body (6), the filler (41) and the pipe (7) are integrated by being forcedly pressed into the inside of 2).

In this joint member (4), the pipe (7) is passed through the pipe insertion hole (20) of the header (2) and the inner surface of the filler (41) is the outer peripheral surface of the header (2). It is fitted so that it follows along with, and is in an assembled state.

In the assembled state obtained as described above, the joint member (4) and the filler (41) are integrated, and the header fitting surface (42) of the filler (41) and the header (2) are integrated. ) Is fitted to the outer peripheral surface of the pipe, the rotational displacement of the joint member (4) around the axis of the pipe (7) is restricted, and the joint member (4) is assembled to the header (2) in a self-jig state.

Also in the case of the structure of this embodiment, the joint member (4) can be assembled into the heat exchanger assembly in a rotation-restricted state by itself without using a brazing jig, so that the brazing work can be performed efficiently. Can be carried out.

Further, according to the structure of this embodiment, a reliable joined state can be obtained even if the joint ridge (22) provided on the joint member body (6) is omitted, and the joint member body is manufactured. There is an advantage that the cost can be reduced.

[0049]

According to the above, the heat exchanger of the present invention is
In the heat exchanger of the type in which the pipe provided in the flange coupling type joint member is directly connected to the header by brazing while being inserted into the pipe insertion hole of the header, Since the rotation restricting means for restricting the rotational displacement of the joint member around the axis before brazing is provided, not only can the joint member be brazed to the header in an appropriate direction, but also the joint member. It is not necessary to use a jig for regulating the rotation of the heat exchanger, and the brazing work of the heat exchanger can be efficiently performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a joint member mounting structure according to a first embodiment.

FIG. 2A is a sectional view of the joint member mounting structure, and FIG. 2B is a sectional view taken along the line I-I of FIG.

FIG. 3 is an exploded perspective view of a joint member mounting structure according to a modification of the first embodiment.

FIG. 4 is an exploded perspective view of a joint member mounting structure according to still another modification of the first embodiment.

FIG. 5 shows a mounting structure according to a second embodiment,
The figure (a) is a sectional view and the figure (b) is a side view.

6A and 6B show a mounting structure according to a modified example of the second embodiment, wherein FIG. 6A is a sectional view and FIG. 6B is a side view.

FIG. 7 is an exploded perspective view of a mounting structure according to a third embodiment.

FIG. 8 is a side view of the same.

FIG. 9 is an exploded perspective view of a mounting structure according to a fourth example.

FIG. 10 is a sectional view of the same.

FIG. 11 is a diagram showing the overall configuration of a heat exchanger, and is shown in FIG.
Is a front view, and FIG.

FIG. 12 is an exploded perspective view showing a conventional mounting structure.

FIG. 13A is a front view of the conventional mounting structure, and FIG. 13B is a sectional view taken along the line II-II of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tube 2 ... Header 20 ... Pipe insertion hole 4 ... Joint member 7 ... Pipe 14, 15, 19, 21 ... Rotation regulation means

Claims (1)

[Claims] 1. A hollow header in which ends of a plurality of tubes for heat exchange are connected in a communicating state is provided, and
A flange coupling type joint member to which an external pipe is connected is provided, and a pipe for connecting the joint member to the inside of the header is provided, and the pipe insertion hole provided in the peripheral wall of the header is provided with The pipe is inserted and fitted,
In a heat exchanger in which a joint member and a header are directly integrated by brazing, a rotation regulating means for regulating the rotational displacement of the joint member around the pipe axis before brazing is provided. Characteristic heat exchanger.