JP3203014B2 - 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 used for, for example, a condenser for a car cooler, an evaporator, or a radiator.

[0002]

2. Description of the Related Art As a heat exchanger used for a condenser for a car cooler car, for example, a plurality of flat tubes and corrugated fins are alternately stacked and a pair of tubes are provided at both ends of each tube. The so-called header type in which hollow headers are connected to each other is widely used.

As a header (23) used in this type of heat exchanger, for example, as shown in FIG. 9, a brazing sheet having a brazing material layer formed on one or both sides is formed into a cylindrical shape, and the brazing sheet is opposed to the brazing sheet. A molded pipe which is joined and integrated in a state where the edges are butted, an extruded pipe made of a cylindrical extruded die, and the like are used. The header (23) is provided with tube insertion holes at predetermined intervals along its longitudinal direction, and the end of the flat tube (25) is inserted into the hole by a predetermined amount. Although it is brazed and integrated, the flat tube (25)
It is slightly difficult to insert and arrange the ends by a predetermined amount with respect to the header (23).

Therefore, conventionally, before inserting the tube, an insertion amount regulating member (24) is previously inserted and arranged in the header (23) as shown by a dashed line in FIG. Each tube (25) in the tube insertion hole
Are inserted until their tips contact the insertion amount regulating member (24), and then the regulating member (24) is pulled out.

[0005] However, the tube insertion operation using the insertion restricting member (24) is slightly troublesome, and has a problem that the operation efficiency is poor.

A heat exchanger of this type is mounted on a mounting side of a vehicle body or the like. For such mounting, a bracket (26) is directly mounted on the header (23), or a bracket mounting bracket is used. A member was attached and a bracket was attached to this. However, there is a problem that the operation of attaching the bracket (26) to the header (23) is slightly troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can easily and surely control the insertion amount of a tube to a header without using an insertion amount control member or the like, and is excellent in productivity. It is an object of the present invention to provide a heat exchanger that can be easily mounted on a vehicle body or the like.

[0008]

According to the present invention, a header is provided on both the tube insertion side and the opposite side.
Divided and formed, these header split halves are held and fixed in an externally fitted state by a holding member having a bracket mounting rib,
These are joined and integrated .

That is, the present invention provides a heat exchanger in which a plurality of flat tubes and fins are alternately stacked and a pair of hollow headers are connected to both ends of the tubes. to the inner header split halves having a hole portion while being divided into a oppositely disposed outer header split halves, both of these headers divided halves are joined in a state of butting their opposite edges Dooshi On the other hand, the bracket mounting ribs (12
c) have a, and know the outer peripheral surface of the header (3) (4)
A holding member (12) formed in a corresponding shape and size that can conform to the hollow is provided with the two header split halves (5).
(6) The gist of the present invention is a heat exchanger, which is provided in an outer fitting state covering the butt joints (3a) and (4a) and is joined.

[0010] As the holding member, in order to improve the pressure resistance of the f Dda, it is preferable to use a long to some extent in length capable of fitting in the longitudinal direction of the header.

The bracket mounting rib of the holding member may be provided in a laterally projecting direction of the heat exchanger when mounted on the header, or may be provided in a front-rear direction of the heat exchanger. Projections may be provided on one or both sides, and their positions, numbers, shapes, etc. may be set as necessary. The rib may be provided over the entire length of the holding member, or may be provided on a part thereof. For the purpose of easily attaching the bracket, it is preferable to drill an attachment hole in the rib.

The holding member is preferably made of an extruded aluminum material that is easy to manufacture.

[0013] In order to integrate the holding member and the header by brazing in a furnace and integrate the two header divided halves together by brazing, the surfaces of the aluminum core material are used as the two header divided halves. It is preferable to use a brazing sheet formed by coating a brazing material layer.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on an embodiment in which the present invention is applied to a multi-flow aluminum heat exchanger as a condenser used in a car air conditioner.

In this specification, the term aluminum is used to include its alloy.

In FIG. 1, (A) is a heat exchanger main body, and the main body (A) has a plurality of flat aluminum tubes (1) arranged vertically in a horizontal state, and adjacent tubes (1). 1) An aluminum corrugated fin (2) disposed between (1) and outside the outermost tube (1), and a pair of left and right headers disposed on both sides of the tube (1) and connected to the tubes. (3)
(4). The tube (1) is made of a flat hollow extruded material made of an aluminum material. As this tube (1), a porous type tube called a so-called harmonica tube having excellent pressure resistance and heat conductivity may be used, or an electric resistance welded tube or the like may be used regardless of the extruded material. Is also good. In this case, for the same reason, it is preferable to provide a partition wall along the longitudinal direction inside by inserting, for example, a corrugated inner fin.

The corrugated fin (2) is formed by winding a narrow band brazing sheet in which a brazing material layer is formed on both sides of an aluminum core having substantially the same width as the tube (1) in a meandering manner. It is joined to the tube (1) by attaching. Corrugated fins (2)
In order to further improve the heat exchange efficiency, it is preferable to use a cut-out louver (2a).

As shown in FIG. 2, each of the headers (3) and (4) has an aluminum inner header divided half (5) in which tube insertion holes (5a) are arranged at predetermined intervals.
And an aluminum outer half-segment half (6) also disposed opposite thereto. As shown in FIG. 3, the two divided halves (5) and (6) are arranged so that the opposing edge portions (5b) and (6b) abut each other, and are joined and integrated. On the other hand, the inner header split half (5) has a tube insertion hole (5
In a), the end of the tube (1) is joined and integrated with a predetermined amount inserted.

The two header split halves (5) and (6) are:
Each of them is made of a press-formed product obtained by forming a brazing sheet in which a brazing material layer is formed on both inner and outer surfaces of an aluminum core material. When the brazing sheet is used in this manner, the two header split halves (5) and (6) are mutually described, the inner header split halves (5) and the tube (1), and the header split halves (5) and (6) are described later. Holding member (1
2) can be easily and reliably integrated by brazing in a furnace.

As shown in FIG. 1, both ends of the headers (3) and (4) are closed by lids (7) and (7), respectively.

A heat exchange medium inlet pipe (8) is connected to the outer upper part of the left header (3) in a laterally protruding manner, while an outlet pipe (9) is connected to the outer lower part of the right header (4). Have been. A partition plate (10) for dividing the header (3) into two upper and lower chambers is provided at a position slightly above the middle part in the vertical direction of the left header (3), while the right header (4) is provided.
A partition plate (10) is also provided at about a quarter from the lower end of the tube, and the total heat exchange medium passage constituted by the tube group is divided into three upper and lower passage groups, and the heat exchange medium is passed through each passage. The group flows in a meandering manner and flows out of the heat exchange medium outlet pipe (9), and exchanges heat with the air flowing through the air flow gap including the corrugated fins (2) formed between the tubes (1). It is done and condensed.

Outside the outermost fin (2), a side plate (11) made of an aluminum strip having substantially the same width as the corrugated fin (2) is provided.

The left and right headers (3) and (4) are provided with holding members (12) and (12) at intermediate portions except for upper and lower ends where the heat exchange medium inlet / outlet pipes (8) and (9) are attached. They are arranged in a fitted state and are joined and integrated.

As shown in FIGS. 2 and 3, the holding members (12) and (12) are formed in a corresponding shape and size that can smoothly fit along the outer peripheral surfaces of the headers (3) and (4). At the same time, a cylindrical main body (12
a), a pair of extending portions (12b) and (12b) extending in parallel outward from the opposing edge thereof, and the pair of extending portions (12b) and (12b) at the opposite side to the cylindrical body (12a). And a bracket mounting rib (12c) extending outwardly. Bracket mounting holes (13) and (13) are formed at both upper and lower ends of the rib (12c).
A bracket (not shown) is connected and fixed by a fastening member such as a bolt, and can be mounted on a mounting side of a vehicle body or the like.

The bracket mounting ribs (12
For example, as shown in FIG. 7, c) may be extended sideways so as to be orthogonal to the extending portion (12b). It should just be set according to.

As shown in FIG. 3, the holding member (12) has a cylindrical main body (12a) having a header (3).
(4) is arranged so as to cover the butt joints (3a) and (4a) of the divided halves (5) and (6), and the extended portions (12b) and (12b) are provided on the side surfaces of the tube (1). It is arranged in a state of being adjacent to. And the holding member (12)
And the two divided halves (5) and (6) are integrated by brazing.

The above heat exchanger is manufactured as follows.

First, the inner header half (5) is placed on a flat surface with its tube insertion hole (5a) facing upward. Then, each tube insertion hole (5
Insert one end of each tube (1) into a) until it abuts against a flat surface. Similarly, the other end of the tube (1) is inserted into the tube insertion hole (5a) of the inner header half (5).

Next, the outer header split halves (6) and (6) are abutted against the inner header split halves (5) and (5) with the opposing edges (5b) and (6b) of the two. (3) with a substantially circular cross section
Form (4). And these two headers (3)
(4), the tubular main body (12a) of the holding member (12) is fitted to the outer divided state covering the butt joints (3a) and (4a) of the header divided halves (5) and (6). The header divided halves (5) and (6) are fitted and fixed. In this state, the extending portions (12b) (12b) of the holding member (12) are in a state of being in contact with the side surface of the tube (1).

Then, the corrugated fin (2) is interposed between the adjacent tubes, is disposed outside the outermost tube (1), and the side plate (11) is disposed outside the outermost fin (2). And temporarily fix it. Also, lids (7) are provided on both upper and lower ends of the headers (3) and (4).
(7) While (7) and (7) are provided respectively, as shown in FIG. 4, the entrance / exit pipes (3b) and (4b) are formed in the entrance / exit pipe insertion holes (3b) and (4b). 8) (9)
Insert and place.

FIGS. 4 and 5 show the state where the inlet / outlet pipes (8) and (9) are inserted and arranged in the headers (3) and (4).
As shown in (1), a ring-shaped auxiliary brazing material (14), a part of which is cut in the circumferential direction, is fitted to the base ends of the inlet / outlet pipes (8) and (9) by utilizing its spring effect. . As shown in FIG. 6, this ring-shaped auxiliary brazing material (14) is used to ensure that the brazing material goes around the joint between the tube (1) and the inner header split half (5). It is preferable to use a header (3) formed in a corresponding shape that can be in contact with the outer peripheral surface of the (4).

The heat exchanger temporarily fixed and assembled as described above is manufactured by carrying the heat exchanger into a furnace or the like and brazing the components together.

[0033]

As described above, in the heat exchanger according to the present invention, the header is divided into the inner header half having the tube insertion hole and the outer header half which is disposed opposite to the inner header half. while being divided, the both headers divided halves is shall such joined abutted their opposite edges Dooshi. Therefore, when inserting the tube end into the header, the inner header split half is placed on a flat surface, and the tube end is inserted into each of the tube insertion holes until the tube end comes into contact with the flat surface. By arranging the outer header half halves opposite the header half halves, the tube can be inserted into the header by a predetermined length without using a tube insertion amount regulating member as in the related art.

Moreover, the holding member is attached to the outer peripheral surface of the header.
It is formed in a corresponding shape and size that can fit closely
The two header split halves are arranged in an externally fitted state covering their butt joints, and are joined and integrated. When assembling the heat exchanger, the heat exchangers are combined as described above. There is no need to use a separate fixing jig by fitting the holding member to the header divided half in an externally fitted state. Therefore, not only the assembling work can be simplified, but also the inconvenience such as the fact that the jig loses heat and the brazing failure occurs when the brazing is performed in a furnace at once can be solved.

Further, since the holding member has a bracket mounting rib on the outer peripheral surface thereof, the bracket can be mounted easily and reliably using the rib.

[Brief description of the drawings]

FIG. 1 is a plan view of a heat exchanger according to the present invention.

FIG. 2 is a perspective view showing a split header half, a holding member, a tube portion, and the like in a separated state.

FIG. 3 is an enlarged cross-sectional view near a header.

FIG. 4 is a side view showing a cross section of the header in a state where an auxiliary brazing material is attached to the heat exchange medium entrance / exit tube.

FIG. 5A is a plan view of an auxiliary brazing material, and FIG. 5B is a side view of the same brazing material.

FIG. 6 is a side view showing a modification of the auxiliary brazing material.

FIG. 7 is a cross-sectional view showing a modification of the holding member.

FIG. 8 is an enlarged side view of a conventional heat exchanger near a header.
It is sectional drawing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tube 2 ... Fin 3, 4 ... Header 3a, 4a ... Butt joint 5 ... Inner header split half 5a ... Tube insertion hole 5b ... Opposite edge 6 ... Outer header split half 6a ... Opposite edge 12 … Holding member 12c… Rib for bracket mounting

Claims (1)

(57) [Claims] 1. A heat source in which a plurality of flat tubes (1) and fins (2) are alternately stacked and a pair of hollow headers (3) and (4) are connected to both ends of the tube (2). In the exchanger, the headers (3) and (4) are provided with tube insertion holes (5).
inner header split halves having a) (5) and which in oppositely disposed outer header split halves together is divided into (6), these two headers divided halves (5) (6) it
While being joined abutted opposing edges of al the (5b) (5b) Dooshi, have a bracket mounting rib (12c) on an outer peripheral surface, and
The outer peripheral surfaces of the headers (3) and (4) can be closely contacted
Holding member (12) formed in corresponding shape and size
The heat exchanger is provided so as to be fitted to the two header split halves (5) and (6) so as to cover their butt joints (3a) and (4a), and is joined thereto.