JP2742834B2 - 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 mainly used for a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, as this kind of heat exchanger, there is one having a structure disclosed in Japanese Utility Model Publication No. 2-16150, for example. This heat exchanger according to the prior art forms a heat exchange element having a heat exchange medium passage by joining two formed plates in the middle, and inserts a plurality of fins between the heat exchange elements. In this case, a separate tank was placed on the end of the stacked heat exchange elements and connected.

[0003] The joining between the heat exchange elements is performed by brazing by abutting brazing portions projecting inward or outward.

[0004]

However, since the heat exchange element provided with the brazing portion inside has a brazing portion formed in a U-shaped cross section, it can be formed by one press. However, there is a problem that a bending step is required and the number of manufacturing steps is increased.

[0005] Further, the heat exchange element provided with the brazing portion on the outside has a problem that the brazing portion protrudes toward the tank, thereby causing passage resistance in the tank.

Therefore, an object of the present invention is to provide a heat exchanger which can be easily manufactured and does not cause passage resistance in a tank in order to solve the above-mentioned problems.

[0007]

In order to achieve the above object, a heat exchanger according to the present invention comprises a flat end plate portion and a pair of symmetrically arranged longitudinally with respect to the end plate portion. And a substantially rectangular forming plate having a heat exchanging element constituent part, wherein the pair of heat exchanging element constituent parts have ridges extending from substantially the center of the end plate part toward both ends of the forming plate. And a substantially U-shaped bulging portion is formed between the ridge and the edge portion, and the bulging portions of the forming plate face each other from fold portions at both ends of the end plate portion. The pair of heat exchange element components is bent so that a fin is interposed between the pair of heat exchange element components, and each heat exchange element component is connected to one of the heat exchange elements of the adjacent molding plate. A plurality of stages stacked in contact with the component,
A heat exchange element portion having a substantially U-shaped heat exchange medium passage is formed from the heat exchange element component portions that are in contact with each other, and each end plate portion of the stacked forming plates is connected to form a flat tank end. A plate is formed, and a tank cover is mounted on the tank end plate and connected.

[0008]

Therefore, the forming plates are stacked in a plurality of stages by abutting a pair of heat exchange element components bent from the folds at both ends of the end plate portion, and the heat exchange elements from the contacted heat exchange element components are stacked. Since the connection between the heat exchange element parts is made by the end plate part of the forming plate connecting the pair of heat exchange element parts, the heat exchange element parts are connected. There is no joining portion (joint) to be joined by attaching, so that the above problem can be solved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, a heat exchanger includes a plurality of stacked forming plates 1 stacked one upon another, a fin 2 inserted into each forming plate 1, and an inlet pipe 4 provided at one end of the stacked forming plates 1. And a tank cover 8 provided with an outlet pipe 6.

FIG. 2 shows the molded plate 1 before being bent, and FIG. 3 shows the formed plate. The forming plate 1 is substantially rectangular and has a flat end plate portion 10 at the center thereof.
A pair of heat exchange element forming parts 12A and 12B are formed in the longitudinal direction with the fold part 11 as a boundary centering on 0.

Heat exchange element constituting parts 12A, 12B
The molding plate 1 extends from substantially the center of the end plate 10.
A ridge 14 is extended toward both ends of the ridge 18 and a substantially U-shaped bulge 18 is provided between the ridge 14 and the edge 16. A plurality of round beads 20 are protruded in a staggered manner, and three corner beads 22 are protruded from the entrance side of the bulging portion 18 with the ridge 14 interposed therebetween.
A concave / convex portion 24 for forming an entrance / exit of a heat exchange medium is provided on the entrance / exit side of the bulging portion 18 provided with the square bead 22.
Further, for example, three plate abutting portions 26 are protruded from the ends of the heat exchange element constituting portions 12A and 12B.

The heat exchange element constituting sections 12A, 1
As shown in FIG. 3, the forming plate 1 having 2B is bent such that the heat exchange element constituting portions 12A and 12B face the bulging portions 18 from the fold portions 11 and face each other at the bent ends. The plate abutment portion 26 is in contact with the plate abutment portion 26 and the end plate portion 10 so as to define the distance of a gap for inserting the fin 2 into the forming plate 1.

Then, the bent forming plate 1
As shown in FIG. 1 and FIG. 4, each of the heat exchange element components 12A, 12B is connected to the adjacent heat exchange element components 12A, 12B of the forming plate 1 by the ridges 14 and the edge portions 1.
6 are stacked in a plurality of stages, and the heat exchange element units 30A and 12B contact the heat exchange element units 30A and 12B.
At the end of the heat exchange element portion 30, the entrance and exit 32, 34 of the heat exchange medium from the opposite entrance / recess forming recess 24, and the substantially U-shaped heat exchange from the opposing bulge 18 inside. A medium passage 36 is configured. The round bead 20 and the corner bead 22 oppose each other inside the heat exchange medium passage 36 to reinforce the heat exchange element portion 30 and to act on the heat exchange medium flowing through the heat exchange medium passage 36 in a turbulent manner. To improve the heat exchange rate. The end plates 10 of the stacked forming plates 1 are connected to form a flat tank end plate 38, and a tank cover 8 described below is mounted on the periphery of the tank end plate 38 for connection. It is supposed to.

Note that side plates 40 are in contact with the forming plates 1 at both ends in the laminating direction.

The tank cover 8 has a substantially rectangular shape, has an inlet pipe 4 and an outlet pipe 6 provided on its upper surface, and has an inlet (not shown) for a heat exchange medium opened on the bottom surface. Are mounted on and connected to the peripheral edge of a tank end plate 38 constituted by the end plate portion 10 of the molded plate 1 in which the tank cover 8 and the tank end plate 3 are stacked.
8, the tank 50 is constituted. The internal space of the tank 50 is divided into two in the longitudinal direction by a partition portion (not shown), and an inlet passage communicating with the inlet pipe 4 is formed in one space, and an outlet passage communicating with the outlet pipe 6 is formed in the other space. It has become. The entrance passage communicates with the entrance 32 of each heat exchange element unit 30, and the exit passage communicates with the entrance 34 of each heat exchange element unit 30.

In the heat exchanger having such a configuration, the heat exchange medium flowing into the inlet passage of the tank 50 from the inlet pipe 4 flows through the heat exchange medium passages 36 of the respective heat exchange element sections 30.
In the meantime, heat exchange is performed with the outside air, and the heat is collected in the outlet passage of the tank 50 and discharged from the outlet pipe 6 (or follows the reverse route).

Thus, the heat exchanger is provided with
Are bent to form a heat exchange element portion 30 from the heat exchange element constituting portions 12A and 12B of the abutted forming plate 1, and the forming plate 1 is provided between the heat exchange element portions 30. End plate part 1
Since there is no connection between the heat exchange elements, there is no joint that requires brazing. Therefore, it is not necessary to provide a brazing portion between the heat exchange elements, which is conventionally required, and the man-hour for forming the plate is reduced, the workability is easy, and a material excellent in mass productivity is provided. Can be provided.

Further, since there is no brazing portion between the heat exchange elements 30, the passage resistance is not generated in the tank, the heat exchange rate can be improved, and the heat exchange elements 30 and Since the end plate portion 10 is continuous, the space between the tank and the heat exchange element portion 30 is excellent in airtightness.

Further, since the structure is such that the formed plate 1 is bent into two and laminated, the number of parts can be reduced as compared with a conventional formed plate having a two-piece structure.

[0021]

As described above, according to the present invention,
The forming plate is bent into two and stacked in multiple stages, and the heat exchange element portion is formed from the heat exchange element constituting portions of the forming plates that are in contact with each other, and the end of the forming plate is formed between the heat exchange element portions. Since they are connected by the plate part, there is no need to provide a brazing part between the heat exchange element parts, which reduces the man-hours for manufacturing the forming plate, facilitates workability, and improves mass productivity. Excellent things can be provided.

Further, since there is no brazing portion of the heat exchange element, the passage resistance does not occur in the tank, and the heat exchange rate can be improved.

Further, since the heat exchange element portion and the end plate portion have a continuous structure, the space between the tank cover and the heat exchange element portion is excellent in airtightness.

Further, since the structure is such that the formed plate is bent into two and laminated, the number of parts can be reduced as compared with the conventional formed plate having a two-piece structure. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a plan view of a forming plate.

FIG. 3 is a perspective view of a bent forming plate.

FIG. 4 is a diagram illustrating a state of lamination of forming plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forming plate 2 Fin 8 Tank cover 10 End plate part 11 Folded part 12A, 12B Heat exchange element constituent part 14 Ridge 16 Edge 18 Swelling part 30 Heat exchange element part 36 Heat exchange medium passage 38 Tank end plate 50 Tank

Claims (1)

(57) [Claims] 1. A substantially rectangular forming plate having a flat end plate portion and a pair of heat exchange element components symmetrically arranged in the longitudinal direction with the end plate portion as a center. In the heat exchange element constituting portion, a ridge extends from substantially the center of the end plate portion to both ends of the forming plate, and a substantially U-shaped bulge is formed between the ridge and the edge portion. The formed plate is formed by bulging, and the forming plate is formed by bending a pair of heat exchange element components so that the bulges face each other from the folds at both ends of the end plate portion. The fins are interposed between the heat exchange element components, and the heat exchange element components are stacked in a plurality of stages in contact with one of the adjacent heat exchange element components of the forming plate. A heat exchange element portion having a substantially U-shaped heat exchange medium passage is formed, and each end plate portion of the laminated forming plates is connected to form a flat tank end plate; A heat exchanger comprising a tank cover mounted thereon and connected thereto.