JP2980445B2 - 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 which can be used as 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,
Recently, as shown in, for example, FIG. 3, both ends of a plurality of flat tubes (1) are a pair of hollow headers (3).
The tube (1) is connected in communication with (3), and
A so-called multi-flow type heat exchanger having a basic structure in which fins (2) are arranged in the gaps between them is preferable as a device that can realize high heat exchange efficiency, low pressure loss, and ultra-compactness. Tend to be used.

[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 or the like by batch brazing.

[0004] Conventionally, in this type of heat exchanger,
In order to connect the header (3) to the external pipe, one end of the outlet pipe (51) is connected to the header (3) as shown in FIG. 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 the 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. There is naturally a limit in securing the joint member (52), and depending on the use conditions and the like, it is expected that the state of attachment of the joint member (52) in the heat exchanger may not always be stable and strong. Therefore, in such a case, it has been conceivable to adopt a configuration in which a bracket is separately prepared and the joint member (52) and the heat exchanger main body are connected in an integrated state. Invites disadvantages.

In view of the above-mentioned drawbacks of the prior art, the present invention has a structure which can make the attachment state of the joint member stronger and more stable than before without causing 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]

In the above object, according to the Invention The, present invention, in a heat exchanger the ends of the plurality of tubes (1) comprises a connecting hollow headers (3) in communication with an external piping ( The joint member (4) that connects the 5) to the header (3 ) is a block member having a flange connection surface (13).
Fits to the joint body (11) and header (3) from the side
And an integral surrounding part (12).
The joint body (11) is located within its flange connection surface (13).
A refrigerant flow hole (14) is opened in
For connecting the flange joint type joint member (6)
While having a hole (15), the surrounding portion (1
2) enclose and surround the outer peripheral surface of the header (3)
Enclosing body (17), and the enclosing body (17)
Tube abutment projection protruding toward tube (1)
(18), and the enclosure portion main body (17)
Opening for refrigerant circulation provided on the inner surface in contact with the header
(20) is a flow passage (21) provided in the joint member (4).
Through the refrigerant flow hole (1) in the flange connection surface (13).
4) and the refrigerant flow on the inner surface of the enclosure body (17).
Connect the passage opening (20) to the refrigerant passage opening (3) of the header (3).
e), and protrusion for tube contact engagement (18)
Abuts on the tube (1).
The body (17) is joined to the outer periphery of the header (3) in a fitted state
The flange of the joint body (11) is integrated.
Attached to the coupling surface (13) at the end of the external pipe (5)
Flange connection type joint member (6) is tightened with screw (23).
The gist of the present invention is a heat exchanger characterized in that the heat exchanger is made .

[0008]

In the above construction, the joint member for connecting the external pipe has an enclosing portion integrally enclosing the outer peripheral portion of the header, and is brazed by enclosing the outer peripheral portion of the header in the enclosing portion. Since the surrounding portion is integrally joined to the header, a required wide joining area is secured between the joint member and the header, and the mounting state of the joint member becomes stable and strong.

[0009]

Next, an embodiment in which the present invention is applied to a multi-flow type aluminum condenser for a car cooler will be described. Needless to say, the present invention can be widely applied to heat exchangers for various uses such as a heat exchanger for a room air conditioner and an oil cooler.

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 hollow headers connected to both ends of the flat tube (1) in a communicating state. And
(4) is a refrigerant inlet side joint member, and one header (3)
Attached to. (5) is an external pipe, which is connected to the header (3) in a state of being connected to the header (3) by connecting a flange connection type joint member (6) attached to the end thereof to the refrigerant inlet side joint member (4). . (7) is a refrigerant outlet side joint member, which is attached to the other header (3). 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, and as shown in FIG. 1, the inside thereof 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 or the like may be used instead of the extruded material.

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

The headers (3) and (3) may be single-sided or double-sided,
In particular, one aluminum brazing sheet clad with a brazing material layer on the outer surface side is bent into abutting state on both side edges to form a pipe-shaped cylindrical header pipe (3a). It is covered with the header cap (3b) so that it fits outside. As shown in FIG. 2, on the peripheral side wall of the header (3), tube insertion holes (3d) having a circumferential slit shape are arranged at positions opposite to the butted portion (3c). In addition, a circular opening (3e) for the refrigerant inlet is formed in a mode in which the crotch portion extends to the butting portion (3c). Note that the opening (3e) is formed in advance before the brazing sheet is formed into a state in which both sides of the brazing sheet are butted, for the sake of manufacturing the header hype (3a). In addition, an electric resistance welded pipe, an extruded pipe, or the like may be used as the header pipe (3a).

The refrigerant inlet side joint member (4) is an aluminum flange joint type joint member having a joint body (11) and an enclosure (12) integrally. .

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

The enclosing portion (12) extends along the outer peripheral surface of the header (3) and encloses the enclosing main portion (17), and a core side, that is, a tube ( 1) It integrally has a contact-engaging projection (18) projecting to the side and a fitting projection (19) formed on the inner surface of the contact-engaging projection (18). The surrounding main body (17) surrounds the header (3) in a mode slightly over half its circumference. Further, the outer peripheral portion of the header is held with elastic force. In addition, the contact engaging projection (18)
Is designed to have a height that allows it to be crotch over a plurality of tubes (1). Further, the fitting projection (19) is set to a size that can fit into the gap between the tubes (1) in a fitting state, preferably in a forced fitting state. And
At the inner surface of the enclosure body (17), a circular opening (2
0) is provided, and the opening (20) communicates with the refrigerant inlet (14) of the flange connection surface (13) by a flow passage (21) inside the joint member (4).

In this embodiment, the joint member (4) is formed integrally by extrusion. By manufacturing by extrusion processing in this way, the joint member (4)
Can be manufactured with high productivity, and advantages in cost and the like can be exhibited.

The outlet joint member (7) has a similar structure.

In the manufacture of the heat exchanger, the components of the heat exchanger are first 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 (3d), and the corrugated fin (2) is inserted and arranged between the tubes (1). In addition, a partition member (9),
Assemble the side plates (10) and (10).

At the same time, the inlet side joint member (4) is assembled as follows. First, the surrounding part (12) is fitted to the header (3) from the side. Since the surrounding body (17) surrounds the header (3) in a mode that slightly exceeds a half circumference thereof, the joint member (4) easily comes off to the side after this fitting. Is prevented.
Next, the joint member (4) is placed at a predetermined height, that is,
At a height position where the refrigerant inlet opening (3e) of the header (3) coincides with the refrigerant outlet opening (20) of the joint member (4), it is rotated around the header (3), and FIG. ), The fitting projection (19) is fitted into 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
The rotation of the joint member (4) is firmly restricted in one direction by the action of the contact engaging projection (18), and the length of the header (3) is reduced by the action of the fitting projection (19). Is restricted. Also, the joint member (4) allows the refrigerant outlet opening (20) to move the header (3) into the header (3) with the help of the force-fitting action of the fitting projection (19) and the holding action of the enclosure body (17). 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.

Thereafter, the heat exchanger assembly is subjected to in-furnace brazing, flux brazing, vacuum brazing, or the like, and the butted portion (3c) of the header pipe (3a).
And the whole is integrally joined and integrated. By this brazing, the joint member (4) is brazed to the inner surface of the enclosing main body (17) over a wide range to the outer peripheral surface of the header (3), and is joined to the header (3) in a firmly attached state. 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) has a flange-coupled joint member () provided at the end 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 shows a short cylinder (30).
And one end thereof is fitted to the inside of the refrigerant outlet opening (20) of the joint member (4) in a suitable state, and the other end is inside the refrigerant inlet opening (3e) of the header (3). It is arranged in a state in which it is adapted to protrude, and brazing is performed in that state. In addition, as a short cylinder (30),
An electric resistance welded tube made of an aluminum brazing sheet clad with a brazing material at least on the outer surface side is used.
By using the short cylindrical body (30) in this manner, the opening (20) on the joint member (4) side and the opening (3e) on the header (3) are formed.
Can be easily combined into a centered state, and the joint member (4) can be prevented from being unintentionally rotated around the header (3) in a temporary assembled state before brazing. Is done.

In the embodiment shown in FIG. 5, the flange joint type joint member (6) on the side of the external pipe (5) connected to the joint member (4) has a darma block shape and the joint member (6). 6) has a nipple (35) integral with it,
The nipple (35) is the refrigerant inlet (14) of the joint member (4).
This is an example in which the joint members (4) and (6) are fastened and coupled by screws (23) in a state where they are protruded and fitted inside.

In the embodiments shown in FIGS. 4 and 5 , the same portions or the same functional portions are denoted by the same reference numerals as those used in the embodiments shown in FIGS.

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

[0028]

As described above, according to the heat exchanger structure of the present invention, the joint member for connecting the external pipe integrally has a surrounding portion surrounding the outer peripheral portion of the header, and the surrounding portion has the header. Since the surrounding portion is joined and integrated with the header by brazing while enclosing the outer peripheral portion, a large joining area can be ensured between the joint member and the header, and in the heat exchanger structure, The attachment 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 an increase in the number of parts can be suppressed.

Further , the enclosing part is formed by a tube from the enclosing body.
The tube has a protrusion for tube contact engagement protruding on the side of the tube
That is in contact with the tube.
To the header of the joint member.
That it can be accurately and easily
In the joint body of the joint member, a coolant circulation hole was opened.
It has a flange connection surface, which is provided at the end of the external piping.
Abutted flange joint type joint member and screwed
Can be connected to external piping
The connection work of the external piping of the heat exchanger is simple and strong
Can be done firmly.

[Brief description of the drawings]

FIG. 1 shows the state of attachment of a joint member.
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.

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

FIG. 4 is a perspective view showing another embodiment, in which the heat exchanger components are separated, and FIG. 4 (b) is a sectional view.

5A and 5B show still another embodiment, in which FIG. 5A is a perspective view showing the heat exchanger constituent members in a separated state, and FIG. 5B is a sectional view.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flat tube 3 ... Header 4 ... Joint member 5 ... External piping 11 ... Joint main body part 12 ... Enclosure part 13 ... Flange connection surface 14 ... Refrigerant circulation hole 15 ... Screw hole 17 ... Enclosure part main body 18 ... Projection part 21 … Flow passage

Claims (1)

(57) [Claims] A joint for connecting an external pipe (5) to a header (3) in a heat exchanger having a hollow header (3) in which ends of a plurality of tubes (1) are connected in communication. The member (4) is a block having a flange connection surface (13).
From the side with the joint body (11) and the header (3)
The joint main body (11) has a flange connecting surface (13).
A refrigerant flow hole (14) is opened in
For connecting the flange joint type joint member (6)
While having the hole (15), the surrounding portion (12) extends along the outer peripheral surface of the header (3),
An enclosing main body (17) for enclosing the enclosing main body (17)
The tube contact protruding from 7) to the tube (1) side
And a projection for contact and engagement (18), and provided on an inner surface of the enclosure body (17) in contact with the header.
Coolant opening (20) provided in the joint member (4)
The flange connection surface (13) through the provided flow passage (21)
And a refrigerant flow opening (20) on the inner surface of the enclosure body (17).
Adapt to the coolant circulation opening (3e) of the header (3)
Tube contact engagement projection (18) to tube (1)
In the abutted mode, the surrounding body (17) is
When it is joined to and integrated with the outer periphery of the
In addition, the flange connecting surface (13) of the joint body (11)
Flange connection type joint attached to the end of pipe (5)
The material (6) is to be fastened with screws (23).
A heat exchanger.