JPH0646157B2 - Heat exchanger - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used in, for example, a radiator for an automobile, and more particularly to improvement of a mounting structure for mounting a side piece in a fixed state at its end.

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

2. Description of the Related Art Heat exchangers such as those described above, especially radiators for automobiles,
A heat exchanger is formed by a plurality of tubes and fins arranged in parallel for circulating the heat exchange medium, and both ends in the length direction of each tube are connected to the tank portion for storing the heat exchange medium. The heat is exchanged between the heat exchange medium flowing through the tubes and the air circulation gap including fins formed between the tubes. In such a heat exchanger, a side piece is generally provided on at least one side of the heat exchange section in order to reinforce the heat exchange section and attach a shroud.

Thus, the side piece is attached in a state where its end portion is joined and fixed to the tank portion or the like, but conventionally, there have been the following drawbacks with respect to the attachment of the side piece.

Problems to be Solved by the Invention That is, conventionally, a side piece is set on one side or both sides of a heat exchange part formed by alternately setting fins and tubes, and in this state, on the side piece and the tip of the tube, By inserting the header plate having an insertion hole in the corresponding portion, brazing, welding, etc. to first join the header plate and the side piece, and then by joining the tank portion to the header plate,
The work of attaching the side piece to the tank was complicated. In addition, when a large load is applied to the side piece, there is a possibility of separation at the two joints of the side piece and the header plate, and at the header plate and the tank section, so the risk of separation is also high. It was not always sufficient in terms of mounting strength.

Moreover, since the tank portion is a synthetic resin molded product having a relatively complicated shape, there is a drawback that the cost of the mold for manufacturing the product is high and the product cost is high.

The present invention has an object to provide a heat exchanger capable of solving the above-mentioned problems associated with attachment of side pieces.

MEANS FOR SOLVING THE PROBLEMS In the present invention, a tank portion is formed of a hollow extruded mold material, and a partition wall in the longitudinal direction is provided in the tank portion to form a resin filling space in the tank portion. At the same time, the end portion of the side piece having the retaining hole formed at the end thereof is inserted into the filling space through the outer wall of the tank portion with the retaining hole facing the resin filling space, and A heat exchanger characterized in that a side piece is joined and fixed to a tank portion by injecting and filling a resin into the filling space so as to enter the stop hole.

Embodiment Next, the constitution of the present invention will be explained based on the illustrated embodiment.

This embodiment shows a case where the present invention is applied to a radiator for an automobile.

As shown in FIG. 1 to FIG. 7, in this radiator, a tube (1) and a corrugated fin (2) are alternately laminated in a plurality of stages to form a heat exchange section (3). Two side pieces (4) (4) are arranged outside the outermost corrugated fin, and two tank parts (5) (5) are provided at both ends in the length direction of the tube (1).
, And both ends of each side piece (4) (4) and both ends of each tube (1) are connected to their respective tank parts.

The side piece (4) is made of aluminum,
As shown in FIG. 5 and FIG. 5, the side piece (4b) continuously provided on both side edges of the narrow intermediate piece (4a) in a bent state at right angles.
(4b) and bent pieces (4c) and (4c) continuously bent to the side piece (4b) and bent at right angles to have a predetermined length. Is formed into one. Further, at both ends in the length direction of the intermediate piece (4a), a protruding piece (4d) of a predetermined length continuous with the intermediate piece is formed, and further one circular piece is formed in the inserting piece. A retaining hole (4e) is provided.

The tube (1) is formed of an aluminum electric resistance welded tube, and as shown in FIGS. 3, 4, and 7, the flat tube portion (1a) is formed in the intermediate portion except both ends. On the other hand, both ends are expanded into a circular pipe portion (1c) through a reduced diameter portion (1b) over a predetermined length.

The tank portion (5) is formed of an aluminum hollow extrusion material. In this tank portion (5), as shown in FIGS. 1 and 3, in the cross-sectional shape, other three walls of the outer peripheral wall (5a) except the outer wall on the tube (1) side are substantially rectangular. While forming the side, the tube-side outer wall is formed as a retreat wall (5b) in which the middle portion retreats inward. Due to the presence of the entrance wall (5b), a recess (6) is formed outside the entrance wall, and convex parts (5c) (5c) formed by bent parts of the outer wall are formed on both sides of the entrance wall. ing. Further, the tank portion (5) has a partition wall (5d) having a U-shaped cross section in the lengthwise direction, and the partition wall (5d) forms a space enclosed by the outer peripheral wall (5a) of the tank portion into the retreat wall (5b). It is divided into a resin filling space (7) formed between the partition wall (5d) and the other heat exchange medium storage space (8).
Further, insertion piece insertion holes (14) having a size corresponding to the cross-sectional shape of the insertion piece (4d) of the side piece are formed at predetermined positions on both ends of the retreat wall (5b) in the length direction. There is. Then, in each side piece, the intermediate piece (4a) is positioned inside, that is, on the heat exchange section (3) side, and the insertion piece (4d) is inserted into the corresponding insertion hole (14) of the tank part entry wall (5b). By inserting the tip until it comes into contact with the partition wall (5d), as shown in FIG. 1, the retaining hole (4e)
Is disposed so as to face the resin filling space (7) and is firmly connected and fixed to the tank portion (5) through the resin (10) injected and filled in the resin filling space. Here, the retaining hole (4e) provided in the insertion piece (4d) of the side piece is for producing the retaining effect of the side piece by the resin entering into the hole.

On the other hand, the tube (1) is also joined and fixed to the tank portion (5) in the same manner as the side piece (4). That is, the entrance wall (5b) and the partition wall (5d) of the tank portion are provided with tube insertion holes (9) (9) having a diameter substantially equal to the outer diameter of the circular tube portion (1c) of the tube (1). , Are arranged in a row corresponding to the arrangement intervals of the tubes. In each tube (1), the width direction of the flat tube portion (1a) is aligned with the air flow direction, and the circular tube portions (1c) at both ends are set in the entrance wall (5b) of each tank portion (5). And the insertion hole (9) of the partition wall (5d)
By being inserted into the entrance wall (5b) and the partition wall (5
The tank portion (5) is arranged so as to penetrate through the resin filling space (7) and penetrates the resin filling space (7).
It is firmly connected and fixed to (5). In this connection state, as shown in FIGS. 4 and 7, the tube (1)
Of the circular pipe part (1c) substantially coincides with the end face of the partition wall (5d), and its opening faces the space (8) for storing heat exchange medium, and the rear end of the circular pipe part (1c) is The front end of the flat tube part (1a) almost coincides with the outer surface of the convex part (5c) of the tank part, and the reduced diameter part (1b) of the tube (1) substantially matches the outer surface of the retreat wall (5b). It is accommodated in the recess (6) of (5).

The resin (10) plays a role of connecting and fixing the tank part (5) to the side piece (4) and the tube (1) as described above. The resin (10) is cured in a liquid state after being injected into the resin filling space (7). In this embodiment, the resin is injected through the injection hole (12) provided in one of the end plates (11) that closes the openings (5e) at both ends of the tank (5). Such resin (1
As (0), any one can be adopted as long as it exhibits a sufficient joining force between the tank portion (5) and the tube (1) or has good workability for injection, but is particularly preferable. Epoxy resin may be used.

The corrugated fins (2) are made of aluminum and have a corrugated plate-like structure in which one plate is continuously folded back in a curved shape at equal intervals. Preferably, each vertical wall portion has a louver. What is cut and raised is used. This corrugated fin (2) has a fin height slightly higher than the interval between the adjacent tubes (1) and (1), and has a fin length substantially equivalent to the length of the flat tube portion (1a) of the tube. Designed to have. As shown in FIG. 4, heat exchange in which both ends of the fin (2) are matched with both ends of the flat tube portion (1a) and the direction of air flowing between the corrugated fins flows through the tube (1). It is arranged and fixed in a direction orthogonal to the direction of the medium. In the attached state of the fins (2), as shown in FIG. 4, between both ends of the heat exchange part (3), that is, between the front end of the flat tube part (1a) and the rear end of the circular tube part (1c) of the tube (1). A non-existing portion (P) of the fin is generated at. Thus, in this embodiment, the convex portions (5c) (5) formed at both ends of the entrance wall (1b) of the tank portion (5).
According to c), the non-existing portion (P) is covered from both sides. Therefore, this causes a so-called wind escape phenomenon that occurs in the non-existing portion (P) of the fin when there is no coating by the convex portion (5c), that is, the circulating air passes through without resistance with little contribution to heat exchange. The phenomenon can be prevented and all the circulating air can be made to pass through the region where the fins (2) are present, which contributes to the improvement of heat exchange efficiency. Not only is the joint portion between the tube (1) and the tank portion (5) hidden, but it also has a good appearance.

In FIG. 2, (15) is a mounting boss for the temperature detecting sensor of the heat exchange medium, and the post-extrusion tank portion (5) is
It is provided after the next processing. Further, (16) is a heat exchange medium inflow pipe, (17) is the same outflow pipe, (18) is a filler neck, (19) is a bracket for mounting the radiator at a desired position, and these are the tubes (1) and It is separately brazed to the tank part (5) before being joined to the tank part (5). Note that (20) is an overflow pipe.

In manufacturing the radiator as described above, first, a tank portion (5) is formed by a hollow extruded mold material having a predetermined length, and then a sensor mounting boss (15) is formed on the tank portion (5) by secondary processing.
The end plate (1
1), the heat exchange medium inflow / outflow pipes (16) (17), the filler neck (18), and the bracket (19) are joined to corresponding parts by brazing. After that, the tank part (5) is
And the side piece (4) and the tube (1) are joined. That is, the tube (1) has both ends thereof with insertion holes (9) for the entrance wall (5b) and partition wall (5d) of each tank portion (5).
Insert the both ends into the insertion hole (14) with the side piece (4) oriented in a predetermined direction, and then insert between the adjacent tubes (1) (1) and the outermost tube. A corrugated fin (2) having a fin height slightly higher than the interval between the tubes is interposed between the side piece (4) and the side piece (4) in a predetermined direction to form a temporary assembly state of the radiator. By adopting such an assembly method,
The tube (1), the fins (2), the tank portion (5), and the side piece (4) are firmly fixed, and the jigs, tightening bands, etc., which have been conventionally required, are unnecessary. Then, after that, the tube (1) and the fin (2) and the outermost fin and the side piece (4) are joined and fixed by, for example, a reactive soldering method. As another method, the tube (1) and the fins (2) are alternately arranged and the side pieces (4) are arranged on both sides of the assembly, and the assembly is performed by brazing in advance, and then the tank. It may be inserted into the part (5). Then, the fixing resin (10) is injected from the injection hole (12) of the end plate (11) into the resin filling space (7) of the tank portion (5). At this time, the heat at the time of joining is used to fill the resin without any gaps, and if necessary, further heating is performed to cure. After the resin (10) is cured, the side piece (4) is firmly bonded and fixed to the tank part (5) through the resin (10), and the tube (1) is also completely bonded and fixed to the tank part. It becomes a thing.

8 and 9 show another embodiment of the present invention. In this embodiment, the outer peripheral wall (105
a) is configured to form four sides of a substantially rectangular shape in cross section, and a partition wall (105d) having a U-shaped cross section is integrally provided on the inner surface of the outer wall on the heat exchange section (3) side to fill the resin. A space (107) is formed. Moreover, the side piece (104) is formed in a U-shaped cross section, and an ear piece (25a) having a nut fixing hole (25) for attaching the shroud is provided at a predetermined position of the side piece. In this embodiment, there is no portion corresponding to the convex portion (5c) of the tank portion (5) in the first embodiment described above, but the presence of the convex portion is not a constituent feature of the present invention. However, it is needless to say that the presence of the convex portion is preferable from the viewpoint of preventing wind escape and deterioration of appearance.

FIG. 10 shows still another embodiment of the present invention. In this embodiment, two vertical partition walls (205) that partition the tank portion (205) in the insertion direction of the tube (201).
Since the d ') (205d') is separated and two horizontal partition walls (205d ") (205d") are also provided in the thickness direction of the tank part, the resin filling space (207) becomes the tank. Department (2
It is divided into two chambers in the tube insertion direction at the middle part in the thickness direction of 05). On the other hand, there are also two circular retaining holes (204e) (204e) on the insertion piece (204a) of the side piece.
e) is provided, and each hole faces the filling space of each chamber, and the resin is joined to the hole in a bite state. In this embodiment, the resin (210) is injected from the injection hole (24) provided in the wall surface of the tank portion (205) and the horizontal partition wall (205d ″) facing the wall surface of the tank portion (205). The inside (205c) is a convex part that covers the non-existing portions of the fins at both ends of the heat exchange part, and is formed in an L-shaped cross-section protruding from the outer wall of the tank part (205) so that the bent parts face each other However, regarding the configuration of the convex portion, the first aspect is that a large heat exchange medium storage space can be secured.
It is advantageous to have the configuration shown in the embodiment of FIG.

In the above examples, the shape of the side piece is However, it is not limited to this. Further, although the retaining holes are shown as being formed with one or two circular holes, they may be formed into a rectangular shape or other shapes, and three or more holes may be provided. Further, although the tank portions (5), (105), and (205) are shown to be made of the aluminum hollow extrusion mold material, they are not limited to those made of aluminum.

EFFECTS OF THE INVENTION According to the present invention, as described above, the tank portion is formed of a hollow extruded mold material, and a partition wall in the lengthwise direction is provided inside to form a resin filling space,
When installing the side piece, the end of the side piece penetrates the outer wall of the tank part and is inserted into the filling space, and the resin is injected and filled into the filling space so that the side piece is joined and fixed to the tank part. It is not necessary to join the side piece to the header plate and the tank portion to the header plate, and the side piece can be directly joined to the tank portion. Therefore, the risk of separation of the side piece and the tank portion when a large load is applied to the side piece can be reduced. Moreover, since the retaining holes are provided at the ends of the side pieces, the retaining holes are filled with resin so that the side pieces can be reliably prevented from falling off, and the side pieces can be mounted more firmly. It can be done. Furthermore, since the tank part is formed from an extruded mold material, it can be easily manufactured by extruding it in a long length and then cutting it into a predetermined length. Even if the width dimension of the heat exchange part changes, the cutting length of the tank You can easily respond by simply changing. Moreover, unlike the case of using the conventional resin tank part, it is not necessary to manufacture a complicated and expensive mold for molding, and it is not necessary to prepare a mold for the tank part for each model, so the tank part It also has the effect of reducing the manufacturing cost of the.

[Brief description of drawings]

1 to 7 show a first embodiment of the present invention,
FIG. 1 is a sectional view of an essential part showing a state where a side piece is attached to a tank portion, FIG. 2 is an external perspective view of a radiator to which the present invention is applied, and FIG. 3 shows a tank portion and side pieces, tubes and corrugated fins. FIG. 4 is a perspective view of an essential part of the radiator shown in FIG. 4, FIG. 4 is a plan view showing the essential part of the radiator shown in FIG. 2 with a part thereof cut away, and FIG. 6 is a sectional view taken along line VI-VI in FIG. 1, FIG. 7 is a sectional view taken along line VII-VII in FIG. 2, and FIGS. 8 and 9 show a second embodiment of the present invention. Shown, 8th
FIG. 9 is a sectional view of an essential part showing a state where the side piece is attached to the tank portion. FIG. 9 is a partial external perspective view of the radiator.
The drawing shows a third embodiment of the present invention and is a cross-sectional view of essential parts showing a state in which the side piece is attached to the tank part. (4) (104) (204) …… side piece, (4e) (104
e) (204e) …… Prevention holes, (5) (105) (205)…
… Tank part, (5d) (105d) (205d ′) (205d ″) ……
Partition wall, (7) (107) (207) ... Resin filling space, (1
0) (110) (210) …… Resin.

Claims (1)

[Claims] 1. A tank portion is formed of a hollow extruded material, and a partition wall in the longitudinal direction is provided in the tank portion to form a resin filling space in the tank portion.
The side piece having a retaining hole formed at an end thereof is inserted into the filling space through the outer wall of the tank portion with the retaining hole facing the resin filling space, and the retaining hole. A heat exchanger characterized in that a side piece is joined and fixed to a tank portion by injecting and filling a resin into the filling space so that the side piece enters into the tank.