JP2005326100A - Tank structure for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reliable tank structure by securing rigidity of a tank during joining such as brazing in regard to a tank body composed by bending a metal plate like a groove. <P>SOLUTION: In a longitudinal center position of the tank body 3, a non-slit part 6 is provided in a middle position crossing the tank body 3, and an L-shaped slit 5 is continuously formed on a bottom 1 and a side wall part 2 on both of its sides. A reinforcing member 10 and the tank body 3 are integrally joined together by placing the reinforcing member 10 in the non-slit part 6, and fitting its fitting part 9 in the L-shaped slit 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of a metal tank used for a heat exchanger such as an automobile.

  A metal tank of a conventional heat exchanger has an elongated box-shaped tank body having one end opened, and a tube plate that closes the open end. The tank body is manufactured through a plurality of drawing processes by a press machine.

In addition, the tank body is bent into a groove shape without passing through the squeezing process, the tube plate is fitted to the bottom, and both ends of the tank body in the longitudinal direction are closed with side covers. It is described in the literature.
This is based on the proposal of the applicant himself, and is a tank structure that can simplify the molding die. For this purpose, the tank body is bent into an elongated groove shape, an intermediate first slit is provided in the longitudinal middle portion, and a pair of end first slits are formed at both ends. Then, a reinforcing member is fitted into the middle first slit of the middle part, and a reinforcing and side lid is fitted into the end first slits at both ends. And a 2nd slit is formed in a reinforcement member and a reinforcement and side cover, respectively, and it clamps the side wall part of a tank main body. And the opening part of a tank main body is fitted by the tube plate, and those junction parts are integrally joined by means, such as brazing.

JP 2003-21488 A

When the tank body is manufactured through a plurality of press drawing processes, a plurality of dedicated molds are required, and the cost for manufacturing the molds is increased. As a result, the price of the entire heat exchanger must be increased.
Next, although the tank structure described in the above-mentioned patent document can simplify the molding die, it has been found by the inventor's experiment that there are the following problems.
The middle first slit provided at the middle in the longitudinal direction of the tank body formed in an elongated groove shape is formed so as to completely traverse the bottom of the tank body. When a reinforcing member is fitted and brazed there, the strength after brazing is sufficient, but there is a drawback that the rigidity of the tank body is weak and easily deformed during brazing. As a result, leakage may occur due to deformation of the tank body.
Then, this invention makes it a subject to solve the problem which concerns.

According to the present invention, a tank main body (3) formed by bending a metal plate into an elongated groove shape having a bottom (1) and both side walls (2), and the tank main body (3) A heat exchanger having a tube plate (4) to which an opening facing the bottom (1) is fitted and fixed, and a pair of end lids (3a) for closing both ends in the longitudinal direction of the tank body (3) In the tank structure,
A pair of a pair of bottom (1) and a part of the side wall (2) formed at both corners on the transverse cross section of the tank body at the center position in the longitudinal direction of the tank body (3). An L-shaped L-shaped slit (5) and a non-slit portion (6) remaining between both L-shaped slits (5) at the bottom (1);
The outer periphery is formed in a substantially portal shape along the outer periphery of the cross section of the tank body (3), a pair of locking slits (7) are formed at the ends of both legs, and the non-slit is formed in the inner periphery of the top of the approximately portal shape. A pair of top pinching portions (8) protruding so as to oppose the interval between the portions (6), and including the top pinching portions (8) and fitting portions fitted into the both L-shaped slits (5) (9) comprises a reinforcing member (10) formed on both shoulders of a substantially portal shape,
The center of the top of the reinforcing member (10) is seated on the non-slit part (6), the fitting part (9) is fitted to the pair of L-shaped slits (5), and the locking slit The tank body (3) and the reinforcing member (10) are joined together in a state in which (7) is fitted so as to sandwich the leading edge of the L-shaped slit (5) of the side wall (2). It is the tank structure of the heat exchanger which becomes.

The present invention according to claim 2 is the method according to claim 1,
A heat exchanger tank configured such that a caulking piece portion (11) protrudes from the outer periphery of the top portion of the reinforcing member (10), and the bracket (12) attached to the outer surface of the tank can be caulked and fixed by the caulking piece portion (11). It is a structure.

  The tank structure of the present invention has a pair of L-shaped slits 5 formed on both sides of the tank body 3 formed in a groove shape at the center position in the longitudinal direction, leaving a non-slit portion 6 on its transverse cross section. Since the substantially gate-shaped reinforcing member 10 having the fitting portions 9 respectively aligned with the L-shaped slits 5 is fitted therein, and the reinforcing member 10 and the tank main body 3 are joined together, A tank structure of a heat exchanger having high strength can be obtained without securing deformation of the tank body 3 during the joining and without deformation during the joining.

  In the above configuration, when the caulking piece portion 11 protrudes from the upper outer periphery of the reinforcing member 10, the bracket 12 and the like can be caulked and fixed to the outer surface of the tank by using it.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a tank structure according to the present invention, and FIG. 2 is a front view of an essential part showing an assembled state thereof.
This tank structure is different from that of Patent Document 1 in the shape of the slit provided in the center in the longitudinal direction of the tank body 3 and the reinforcing member 10 fitted thereto.
In the tank body 3 of this heat exchanger, a bottom 1 and a side wall 2 are formed by bending an elongated metal plate into a groove shape as in the above-mentioned Patent Document 1. A tube plate 4 is fitted and fixed to the opening side of the tank body 3 facing the bottom 1, and both end openings in the longitudinal direction of the tank body 3 are closed by end lids 3 a that also serve as reinforcing members.

In such a tank structure, the feature of the present invention is that the non-slit portion 6 is left at the center of the tank body 3 in the longitudinal direction at the center of the cross section of the tank body 3, and both sides of the non-slit portion 6 are provided. A pair of L-shaped slits 5 are continuously formed in a part of the bottom part 1 and a part of the side wall part 2.
Next, the reinforcing member 10 seated in the non-slit portion 6 and fitted in the L-shaped slit 5 is formed in a substantially portal shape along the outer periphery of the transverse cross section of the tank body 3, and is formed at the ends of both leg portions. A pair of locking slits 7 is formed. The width of the locking slit 7 is equal to the thickness of the tank body 3. Further, the thickness of the reinforcing member 10 is equal to the width of the L-shaped slit portion 5.

Further, a pair of top pinching portions 8 are provided so as to face each other on the inner periphery of the top portion of the substantially portal shape of the reinforcing member 10. The distance between the opposing surfaces of the pair of top portion sandwiching portions 8 is equal to the interval between the non-slit portions 6. And the fitting part 9 is formed in the substantially portal-shaped both shoulder parts including the top part clamping part 8, and the fitting part 9 is fitted by the L-shaped slit 5. FIG. In this example, a caulking piece portion 11 projects from the center of the top portion of the reinforcing member 10.
In this example, a pair of L-shaped slits 5 are formed in the middle portion of the tank body 3, and the same reinforcing member 10 is fitted to each of them.
Then, when the center of the top portion of the reinforcing member 10 is seated on the non-slit portion 6 and the fitting portion 9 is fitted into the pair of L-shaped slits 5, the locking slit 7 is the L-shaped slit 5 of the side wall portion 2. It is fitted so as to sandwich the leading edge. At the same time, the non-slit portion 6 is sandwiched between the pair of opposed top sandwiching portions 8.

A pair of slits 20 are formed at both ends in the longitudinal direction of the tank body 3 so as to be parallel to the width direction over the entire width of the bottom 1, and are slightly continuous with the side wall 2. The end lid portion 3a fitted into the slit 20 has a flat surface substantially aligned with the tank body 3 and has sleeve-like protrusions on both sides thereof, and a locking slit 19 is formed there. Further, a claw portion 14 protrudes from the side facing the tube plate 4.
Such an end lid portion 3 a is fitted into the slit 20, and the claw portion 14 is fitted into the locking hole 15 of the tube plate 4. Next, an inlet / outlet pipe 13 is connected to the side wall 2 of the tank body 3. Further, as shown in FIG. 2, tubes 17 are fitted into the tube insertion holes 16 of the tube plate 4, and fins 18 are arranged between the tubes 17.

Then, the outer surface of at least one of the parts connected to each other is coated with a brazing material. When the whole is assembled, it is inserted into a high-temperature furnace, and the brazing material on the surface of the part is used. The heat exchanger is completed by melting and then cooling and solidifying it.
In addition, the bracket 12 described in FIG. 1 and FIG. 2 is a support part for attaching a heat exchanger to an engine room or the like. When the bracket 12 is formed of a metal material, it is disposed in advance between the pair of reinforcing members 10, and the crimping piece portion 11 of the reinforcing member 10 is bent as shown in FIG. Further, the bracket 12 can be attached after the heat exchanger is brazed. In that case, the bracket 12 may be disposed between the pair of reinforcing members 10 and the caulking piece portion 11 may be bent. In the above description, only the tank body 3 on the upper side of the heat exchanger has been described, but the tank body disposed on the lower side is formed in the same manner as the upper side.

  In the above embodiment, both sides of the tank body 3 are closed by the end lid portion 3a, but instead, a side lid with an edge that matches the opening of the tank body 3 may be fitted. Alternatively, it is possible to extend only the bottom of the groove of the tank body 3 and bend it inward at a right angle to form a side lid.

The disassembled perspective view of the tank structure of the heat exchanger of this invention. The principal part front schematic diagram which shows the assembly state of the tank structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom part 2 Side wall part 3 Tank main body 3a End cover part 4 Tube plate 5 L-shaped slit 6 Non-slit part 7 Locking slit 8 Top part clamping part 9 Fitting part
10 Reinforcing member

11 Caulking piece
12 Bracket
13 Entrance / exit pipe
14 Nail
15 Locking hole
16 Tube insertion hole
17 tubes
18 fins
19 Locking slit
20 slits

Claims (2)

A tank body (3) formed in an elongated groove shape having a bottom (1) and both side walls (2) by bending a metal plate, and an opening side facing the bottom (1) of the tank body (3) is fitted. In a tank structure of a heat exchanger having a tube plate (4) to be fixedly attached and a pair of end lid portions (3a) that closes both ends of the tank body (3) in the longitudinal direction,
A pair of a pair of bottom (1) and a part of the side wall (2) formed at both corners on the transverse cross section of the tank body at the center position in the longitudinal direction of the tank body (3). An L-shaped L-shaped slit (5) and a non-slit portion (6) remaining between both L-shaped slits (5) at the bottom (1);
The outer periphery is formed in a substantially portal shape along the outer periphery of the cross section of the tank body (3), a pair of locking slits (7) are formed at the ends of both legs, and the non-slit is formed in the inner periphery of the top of the approximately portal shape. A pair of top pinching portions (8) projecting opposite to each other at an interval of the portion (6), and including the top pinching portion (8) and fitting to both the L-shaped slits (5) A reinforcing member (10) formed on both shoulders of a substantially gate-shaped portion (9),
The center of the top of the reinforcing member (10) is seated on the non-slit part (6), the fitting part (9) is fitted to the pair of L-shaped slits (5), and the locking slit The tank body (3) and the reinforcing member (10) are joined together in a state in which (7) is fitted so as to sandwich the leading edge of the L-shaped slit (5) of the side wall (2). The heat exchanger tank structure. In claim 1,
A heat exchanger tank configured such that a caulking piece portion (11) protrudes from the outer periphery of the top of the reinforcing member (10), and the bracket (12) attached to the outer surface of the tank can be caulked and fixed by the caulking piece portion (11). Construction.

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