JPH05203387A - Heat exchanger - Google Patents

Abstract

PURPOSE:To enhance a mounting strength of a joint member by forming an enclosure for enclosing an outer periphery of a header integrally at the member for connecting to communicate an outer tube with the header to be connected with a plurality of tubes, and connecting the enclosure to the header by brazing. CONSTITUTION:A heat exchanger such as a condenser for a car cooler comprises corrugated fins 2 interposed between a plurality of flat tubes 1 and 1 extended in parallel in such a manner that both ends of the tubes 1 are connected to communicate with a pair of right and left hollow headers 3. An outer tube 5 is connected to each header 3 through a joint member 4. In this case, the member 4 integrally has a joint body 11 and an enclosure 12. The body 11 is formed in a rectangular parallelepiped block state, and a joint member 6 mounted at the end of the tube 5 is coupled to the coupling surface 13 of one surface of the body 11 by a screw 23. The enclosure 12 is formed of an enclosure body 17 and a contact connecting protrusion 18 protruding from the body 17 to a core side. The header 3 is brazed to the enclosure 12 in a state for enclosing the outer periphery of the header 3 by the enclosure 12 and rigidly mounted.

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 which can be used as a condenser for car coolers, a heat exchanger for room air conditioners 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, a plurality of flat tubes (1) ... Have a pair of hollow headers (3) at both ends.
The tube (1) is connected to the (3) in a communicating state.
A so-called multi-flow type heat exchanger having a basic configuration in which fins (2) are arranged in the gap between the two is preferable as a heat exchanger that can achieve high heat exchange efficiency, low pressure loss and ultra compactness. Tend to be used in.

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 performed by manufacturing an assembly and integrally joining these heat exchanger constituent members by brazing in a furnace or the like.

Conventionally, in this type of heat exchanger,
In order to connect the header (3) to the external pipe for communication, as shown in FIG. 6, one end of the lead-out pipe (51) is connected to the header (3) and the flare is attached to the tip of the lead-out pipe (51). The coupling type joint member (52) was attached. Then, by connecting a joint member on the external pipe side to the joint member (52), a refrigerant circulation circuit can be configured together with a compressor and the like.

[0005]

However, in the conventional structure as described above, the joint area between the joint member (52) and the outlet pipe (51) and between the outlet pipe (51) and the header (3), etc. However, there is a limit to the securing of the condition, and it is expected that the fitting state of the joint member (52) in the heat exchanger may not always be stable and strong depending on the operating conditions. Therefore, in such a case, it is considered that a bracket is separately prepared and the joint member (52) and the heat exchanger body are integrally connected, but in that case, the number of parts is increased. There are disadvantages such as inviting.

In view of the above-mentioned conventional drawbacks, the present invention has a structure in which the fitting state of the joint member can be made stronger and more stable than before without inviting an increase in the number of parts due to the use of brackets or the like. It is intended to provide a heat exchanger.

[0007]

For the above object, the present invention provides a heat exchanger having a hollow header in which the ends of a plurality of tubes are connected in a communicating state, and a joint for connecting an external pipe in communication with the header. The member integrally includes a surrounding portion that surrounds the outer peripheral portion of the header, and the surrounding portion is joined and integrated with the header by brazing while the outer peripheral portion of the header is surrounded by the surrounding portion. The gist is a heat exchanger characterized by that.

[0008]

In the above structure, the joint member for connecting the external pipe has the surrounding portion integrally surrounding the outer peripheral portion of the header, and is brazed in a state where the outer peripheral portion of the header is surrounded by the surrounding portion. Since the surrounding portion is integrally joined to the header, a required wide joint area can be secured between the joint member and the header, and the joint member can be mounted stably and firmly.

[0009]

EXAMPLES Next, examples in which the present invention is applied to a multi-flow type aluminum condenser for a car cooler will be described. It is needless to say that the present invention can be widely applied to heat exchangers for various uses such as heat exchangers for room air conditioners and oil coolers.

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 hollow headers, which are connected in communication with both ends of the flat tube (1). And
(4) is a refrigerant inlet side joint member, one header (3)
Is attached to. Reference numeral (5) is an external pipe, which is connected to the header (3) in a communicating state by connecting a joint member (6) attached to the end of the outer pipe to the refrigerant inlet side joint member (4). Further, (7) is a refrigerant outlet side joint member, which is attached to the other header (3). In addition, (9) is a partition member which partitions the headers (3) and (3) at a predetermined height position so that the refrigerant circulates in the tube (1) group in a meandering manner. (10) (10) is a side plate, the upper and lower outermost corrugated fins (2) (2)
It is placed on the outside to protect the.

The flat tube (1) is made of an extruded aluminum material, and as shown in FIG. 1, 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 or the like 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), (3) are one side or both sides,
In particular, a single aluminum brazing sheet with a brazing material layer clad on the outer surface side is bent into a state where both side edges are abutted to form a cylindrical header pipe (3a). It is closed by a header cap (3b). As shown in FIG. 2, circumferentially slit-shaped tube insertion holes (3d) are arranged on the peripheral side wall of the header (3) at positions opposite to the abutting portions (3c). In addition, a circular opening (3e) for the refrigerant inlet is formed in a manner in which the butting portion (3c) is crotch. It should be noted that the opening (3e) is formed in advance at a stage before forming the brazing sheet into a state in which both side edge parts are abutted with each other for the convenience of manufacturing the header hype (3a). As the header pipe (3a), an electric resistance welded pipe, an extruded pipe or the like may be used.

The refrigerant inlet side joint member (4) is a flange coupling type joint member made of aluminum and integrally has a joint body portion (11) and a surrounding portion (12). ..

The joint body (11) is in the shape of a rectangular parallelepiped having a block-like appearance, one surface of which is a flat flange coupling surface (13), and a refrigerant inlet port (14) is opened in the surface, and A screw hole (15) for flange type connection is provided adjacent to.

The surrounding portion (12) extends along the outer peripheral surface of the header (3) and surrounds the surrounding main body portion (17) and the surrounding main body portion (17) on the core side, that is, the tube ( The contact engagement protrusion (18) protruding toward the side (1) and the fitting protrusion (19) formed on the inner surface of the contact engagement protrusion (18) are integrally provided. The surrounding main body part (17) surrounds the header (3) in a manner slightly exceeding the half circumference thereof. Further, it is set to hold the outer peripheral portion of the header with elastic force. Also, the contact engagement protrusion (18)
Has a height that allows a plurality of tubes (1) to groin. Furthermore, the fitting convex portion (19) is set to a size that allows the fitting convex portion (19) to be fitted in the gap between the tubes (1), preferably in the forced fitting state. And
On the inner surface of the surrounding main body (17), a circular opening (2
0) is provided, and the opening (20) is communicated with the refrigerant inlet (14) of the flange coupling surface (13) by the flow passage (21) inside the joint member (4).

In this embodiment, the joint member (4) is integrally formed by extrusion. The joint member (4) is manufactured by extrusion in this way.
Can be manufactured with high productivity, and an advantage in terms of cost and the like can be exhibited.

The outlet side joint member (7) has the same structure.

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 (3d), and the corrugated fin (2) is inserted and arranged between the tubes (1). Other, partition member (9),
Assemble the side plates (10) (10).

At the same time, the inlet side joint member (4) is assembled as follows. First, the surrounding portion (12) is fitted to the header (3) from the side. Since the surrounding main body (17) surrounds the header (3) in a manner that slightly exceeds the half circumference of the header (3), the joint member (4) easily comes off laterally after this fitting. Is prevented.
Then, the joint member (4) is moved to a predetermined height position, that is,
At a height position where the refrigerant inlet opening (3e) of the header (3) and the refrigerant outlet opening (20) of the joint member (4) coincide with each other, the header (3) is rotated around the header (3), and as shown in FIG. ), The fitting projection (19) is fitted in the gap between the tubes (1), and the inner surface of the contact engagement projection (18) is brought into contact with the core. This allows
Rotation of the joint member (4) is firmly restricted in one direction by the action of the contact engagement protrusion (18), and the length direction of the header (3) is reduced by the action of the fitting protrusion (19). Is regulated. Then, the force fitting action of the fitting convex portion (19) and the holding action of the surrounding body portion (17) are also assisted, so that the joint member (4) has the refrigerant outlet opening (20) in the header (3). It is assembled to the heat exchanger body in a self-jig manner so as to be aligned with the refrigerant inlet opening (3e).

The outlet side joint member (7) is similarly assembled.

After that, this heat exchanger assembly is subjected to furnace brazing, flux brazing, vacuum brazing, etc., and the butted portion (3c) of the header pipe (3a).
Including the above, the whole is integrally joined and integrated. By this brazing, the joint member (4) is brazed and joined to the outer peripheral surface of the header (3) such that the inner surface of the surrounding main body portion (17) of the joint member (4) is firmly attached to the header (3). Be integrated. The same applies to the outlet side joint member (7).

In this heat exchanger, as shown in FIGS. 1 and 2, the joint member (4) of the heat exchanger has a flange coupling type joint member (at the end portion of the external pipe (5)). 6) is fastened with the screw (23), thereby forming a refrigerant circulation circuit together with the compressor and the like. (24) is O
It is a ring.

The embodiment shown in FIG. 4 has a short tubular body (30).
And one end side thereof is fitted into the refrigerant outlet opening (20) of the joint member (4) in a conforming state, and the other end side is inside the refrigerant inlet opening (3e) of the header (3). It is arranged in a state in which it is made to protrude to the conforming state and brazed in that state. In addition, as the short tubular body (30),
An electric resistance welded tube made of an aluminum brazing sheet in which a brazing material is clad at least on the outer surface side is used.
By using the short tubular body (30) in this way, the opening (20) on the side of the joint member (4) and the opening (3e) of the header (3).
And can be easily combined in a centered state, and in the temporary assembled state before brazing, the joint member (4) can be prevented from unintentionally rotating around the header (3). To be done.

In the embodiment shown in FIG. 5, the lead-out pipe (32) is interposed between the joint member (4) and the header (3). In the temporarily assembled state before brazing, the joint member (4) is also held in an appropriate positioning state by the action of the lead-out pipe (32).

In the embodiments shown in FIGS. 4 and 5, the same portions or the same functional portions are designated by the same reference numerals as those used in the embodiments of FIGS. 1 to 3.

Although the joint structure of the present invention is applied to both the refrigerant inlet side and the outlet side in the above embodiment, it may be applied only to the inlet side or the outlet side. Needless to say.

[0028]

As described above, in the heat exchanger structure of the present invention, the joint member for external pipe connection integrally has the surrounding portion surrounding the outer peripheral portion of the header, and the header portion is provided in the surrounding portion. Since the surrounding portion is joined and integrated with the header by brazing in a state where the outer peripheral portion is enclosed, a wide joint area can be secured between the joint member and the header, and in the heat exchanger structure. The fitting state of the joint member can be made stable and strong. Therefore, the use of another member such as a bracket for strengthening the attachment state of the joint member can be eliminated, and the increase in the number of parts can be suppressed.

[Brief description of drawings]

FIG. 1 is a view showing a mounting state of a joint member, and FIG.
Is a perspective view, and FIG.

FIG. 2 is a perspective view showing a joint member, a header, a tube and the like in a separated state.

3A and 3B show the entire configuration of a heat exchanger, wherein FIG. 3A is a front view and FIG. 3B is a plan view.

4A and 4B show another embodiment, FIG. 4A is a perspective view showing a heat exchanger constituent member in a separated state, and FIG. 4B is a sectional view.

5A and 5B show still another embodiment, in which FIG. 5A is a perspective view of a main part and FIG.

FIG. 6 shows a conventional example, and is a front view of a main part of a heat exchanger showing a mounting state of a joint member.

[Explanation of symbols]

 1 ... Flat tube 3 ... Header 4 ... Refrigerant inlet side joint member 5 ... External piping 7 ... Refrigerant outlet side joint member 12 ... Enclosed portion

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 11, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Detailed explanation of the invention

[Correction method] Change

[Correction content]

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 which can be used as a condenser for car coolers, a heat exchanger for room air conditioners 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, a plurality of flat tubes (1) ... Have a pair of hollow headers (3) at both ends.
The tube (1) is connected to the (3) in a communicating state.
A so-called multi-flow type heat exchanger having a basic configuration in which fins (2) are arranged in the gap between the two is preferable as a heat exchanger that can achieve high heat exchange efficiency, low pressure loss and ultra compactness. Tend to be used in.

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 performed by manufacturing an assembly and integrally joining these heat exchanger constituent members by brazing in a furnace or the like.

Conventionally, in this type of heat exchanger,
In order to connect the header (3) to the external pipe for communication, as shown in Fig. 7 , one end of the outlet pipe (51) is connected to the header (3) and the outlet pipe (51) is connected. A flare coupling type joint member (52) was attached to the tip of the. Then, by connecting a joint member on the external pipe side to the joint member (52), a refrigerant circulation circuit can be configured together with a compressor and the like.

[0005]

However, in the conventional structure as described above, the joint area between the joint member (52) and the outlet pipe (51) and between the outlet pipe (51) and the header (3), etc. However, there is a limit to the securing of the condition, and it is expected that the fitting state of the joint member (52) in the heat exchanger may not always be stable and strong depending on the operating conditions. Therefore, in such a case, it is considered that a bracket is separately prepared and the joint member (52) and the heat exchanger body are integrally connected, but in that case, the number of parts is increased. There are disadvantages such as inviting.

In view of the above-mentioned conventional drawbacks, the present invention has a structure in which the fitting state of the joint member can be made stronger and more stable than before without inviting an increase in the number of parts due to the use of brackets or the like. It is intended to provide a heat exchanger.

[0007]

For the above object, the present invention provides a heat exchanger having a hollow header in which the ends of a plurality of tubes are connected in a communicating state, and a joint for connecting an external pipe in communication with the header. The member integrally includes a surrounding portion that surrounds the outer peripheral portion of the header, and the surrounding portion is joined and integrated with the header by brazing while the outer peripheral portion of the header is surrounded by the surrounding portion. The gist is a heat exchanger characterized by that.

[0008]

In the above structure, the joint member for connecting the external pipe has the surrounding portion integrally surrounding the outer peripheral portion of the header, and is brazed in a state where the outer peripheral portion of the header is surrounded by the surrounding portion. Since the surrounding portion is integrally joined to the header, a required wide joint area can be secured between the joint member and the header, and the joint member can be mounted stably and firmly.

[0009]

EXAMPLES Next, examples in which the present invention is applied to a multi-flow type aluminum condenser for a car cooler will be described. It is needless to say that the present invention can be widely applied to heat exchangers for various uses such as heat exchangers for room air conditioners and oil coolers.

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 hollow headers, which are connected in communication with both ends of the flat tube (1). And
(4) is a refrigerant inlet side joint member, one header (3)
Is attached to. Reference numeral (5) is an external pipe, which is connected to the header (3) in a communicating state by connecting a joint member (6) attached to the end of the outer pipe to the refrigerant inlet side joint member (4). Further, (7) is a refrigerant outlet side joint member, which is attached to the other header (3). In addition, (9) is a partition member which partitions the headers (3) and (3) at a predetermined height position so that the refrigerant circulates in the tube (1) group in a meandering manner. (10) (10) is a side plate, the upper and lower outermost corrugated fins (2) (2)
It is placed on the outside to protect the.

The flat tube (1) is made of an extruded aluminum material, and as shown in FIG. 1, 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 or the like 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), (3) are one side or both sides,
In particular, a single aluminum brazing sheet with a brazing material layer clad on the outer surface side is bent into a state where both side edges are abutted to form a cylindrical header pipe (3a). It is closed by a header cap (3b). As shown in FIG. 2, circumferentially slit-shaped tube insertion holes (3d) are arranged on the peripheral side wall of the header (3) at positions opposite to the abutting portions (3c). In addition, a circular opening (3e) for the refrigerant inlet is formed in a manner in which the butting portion (3c) is crotch. It should be noted that the opening (3e) is formed in advance at a stage before forming the brazing sheet into a state in which both side edge parts are abutted with each other for the convenience of manufacturing the header hype (3a). As the header pipe (3a), an electric resistance welded pipe, an extruded pipe or the like may be used.

The refrigerant inlet side joint member (4) is a flange coupling type joint member made of aluminum and integrally has a joint body portion (11) and a surrounding portion (12). ..

The joint body (11) is in the shape of a rectangular parallelepiped having a block-like appearance, one surface of which is a flat flange coupling surface (13), and a refrigerant inlet port (14) is opened in the surface, and A screw hole (15) for flange type connection is provided adjacent to.

The surrounding portion (12) extends along the outer peripheral surface of the header (3) and surrounds the surrounding main body portion (17) and the surrounding main body portion (17) on the core side, that is, the tube ( The contact engagement protrusion (18) protruding toward the side (1) and the fitting protrusion (19) formed on the inner surface of the contact engagement protrusion (18) are integrally provided. The surrounding main body part (17) surrounds the header (3) in a manner slightly exceeding the half circumference thereof. Further, it is set to hold the outer peripheral portion of the header with elastic force. Also, the contact engagement protrusion (18)
Has a height that allows a plurality of tubes (1) to groin. Furthermore, the fitting convex portion (19) is set to a size that allows the fitting convex portion (19) to be fitted in the gap between the tubes (1), preferably in the forced fitting state. And
On the inner surface of the surrounding main body (17), a circular opening (2
0) is provided, and the opening (20) is communicated with the refrigerant inlet (14) of the flange coupling surface (13) by the flow passage (21) inside the joint member (4).

In this embodiment, the joint member (4) is integrally formed by extrusion. The joint member (4) is manufactured by extrusion in this way.
Can be manufactured with high productivity, and an advantage in terms of cost and the like can be exhibited.

The outlet side joint member (7) has the same structure.

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 (3d), and the corrugated fin (2) is inserted and arranged between the tubes (1). Other, partition member (9),
Assemble the side plates (10) (10).

At the same time, the inlet side joint member (4) is assembled as follows. First, the surrounding portion (12) is fitted to the header (3) from the side. Since the surrounding main body portion (17) surrounds the header (3) in a manner slightly exceeding its half circumference, the joint member (4) easily comes off laterally after this fitting. Is prevented.
Then, the joint member (4) is moved to a predetermined height position, that is,
At the height position where the refrigerant inlet opening (3e) of the header (3) and the refrigerant outlet opening (20) of the joint member (4) coincide with each other, the refrigerant is rotated around the header (3), and then, as shown in FIG. ), The fitting projection (19) is fitted in the gap between the tubes (1), and the inner surface of the contact engagement projection (18) is brought into contact with the core. This allows
Rotation of the joint member (4) is firmly restricted in one direction by the action of the contact engagement protrusion (18), and the length direction of the header (3) is reduced by the action of the fitting protrusion (19). Is regulated. Also, the joint member (4) has the refrigerant outlet opening (20) through the header (3), assisting the forced fitting action of the fitting protrusion (19) and the holding action of the surrounding main body (17). It is assembled to the heat exchanger body in a self-jig manner so as to match the refrigerant inlet opening (3e).

The outlet side joint member (7) is similarly assembled.

After that, this heat exchanger assembly is subjected to furnace brazing, flux brazing, vacuum brazing, etc., and the butted portion (3c) of the header pipe (3a).
Including the above, the whole is integrally joined and integrated. By this brazing, the joint member (4) is brazed and joined to the outer peripheral surface of the header (3) such that the inner surface of the surrounding main body portion (17) of the joint member (4) is firmly attached to the header (3). Be integrated. The same applies to the outlet side joint member (7).

In this heat exchanger, as shown in FIGS. 1 and 2, the joint member (4) of the heat exchanger has a flange coupling type joint member (at the end portion of the external pipe (5)). 6) is fastened with the screw (23), thereby forming a refrigerant circulation circuit together with the compressor and the like. (24) is O
It is a ring.

The embodiment shown in FIG. 4 has a short tubular body (30).
And one end side thereof is fitted into the refrigerant outlet opening (20) of the joint member (4) in a conforming state, and the other end side is inside the refrigerant inlet opening (3e) of the header (3). It is arranged in a state in which it is made to protrude to the conforming state and brazed in that state. In addition, as the short tubular body (30),
An electric resistance welded tube made of an aluminum brazing sheet in which a brazing material is clad at least on the outer surface side is used.
By using the short tubular body (30) in this way, the opening (20) on the side of the joint member (4) and the opening (3e) of the header (3).
And can be easily combined in a centered state, and in the temporary assembled state before brazing, the joint member (4) can be prevented from unintentionally rotating around the header (3). To be done.

The embodiment shown in FIG . 5 is a joint member.
Flange connection on the external pipe (5) side connected to (4)
The type coupling member (6) has a dalma block shape, and
The joint member (6) has an integral nipple (35) on it,
The nipple (35) is a refrigerant inlet port (14) of the joint member (4).
Joint members (4) and (6) in a state in which they are projected and fitted in
Is an example in which they are fastened and coupled with screws (23).
It

In the embodiment shown in FIG . 6 , a lead-out pipe (32) is interposed between the joint member (4) and the header (3). In the temporarily assembled state before brazing, the joint member (4) is also held in an appropriate positioning state by the action of the lead-out pipe (32).

In the embodiment shown in FIGS. 4 to 6 , the same portions or the same functional portions are designated by the same reference numerals as those used in the embodiments of FIGS. 1 to 3.

Although the joint structure of the present invention is applied to both the refrigerant inlet side and the refrigerant outlet side in the above embodiment, it may be applied only to the inlet side or the outlet side. Needless to say.

[0029]

As described above, in the heat exchanger structure of the present invention, the joint member for external pipe connection integrally has the surrounding portion surrounding the outer peripheral portion of the header, and the header portion is provided in the surrounding portion. Since the surrounding portion is joined and integrated with the header by brazing in a state where the outer peripheral portion is enclosed, a wide joint area can be secured between the joint member and the header, and in the heat exchanger structure. The fitting state of the joint member can be made stable and strong. Therefore, the use of another member such as a bracket for strengthening the attachment state of the joint member can be eliminated, and the increase in the number of parts can be suppressed.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

FIG. 5 shows still another embodiment, in which FIG.
A perspective view showing the exchanger constituent members in a separated state, FIG.
FIG.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

FIG. 6 shows still another embodiment, in which FIG.
Is a perspective view and FIG.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction content]

[Fig. 7] Fig. 7 shows a conventional example, showing how the joint members are mounted.
It is a principal part front view of the heat exchanger shown.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction content]

[Figure 7]

Claims (1)

[Claims] 1. A heat exchanger comprising a hollow header in which ends of a plurality of tubes are connected in a communicating state, wherein a joint member for communicatingly connecting an external pipe to the header surrounds an outer peripheral portion of the header. A heat exchanger characterized in that the surrounding portion is integrally joined to and integrated with the header by brazing in a state that the surrounding portion is surrounded by the surrounding portion of the header.