| 摘要 |
A heat exchanger mounted on a motor vehicle in particular characterized in that: there are laminated a plurality of core elements each consisting of two side plates provided at opposite end portions of a fin plate in the flowing direction of a first heat transfer medium, two flat plate portions provided on two side plates, respectively, and a tube portion forming differences in level at positions inwardly of the flat plate portions on the side plates between the flat plate portions, to thereby form a first laminated member; a second laminated member formed in the same manner as above and the first laminated member are opposed to each other and jointed together to form flow paths (tubes) inside of the flat surfaces thus jointed, through which a second heat transfer medium flows; and heat exchange is effected between the first heat transfer medium and the second heat transfer medium. Then, with this arrangement, the thickness of the tubes can be reduced with the joining strength between the core elements being maintained. This arrangement reduces a proportion of the whole core portion accounted for by the tubes, and, conversely, that accounted for by the fin plate can be increased, so that conversely the efficiency of heat exchanging in the core portion and heat radiating performance of the fin plate can be increased. <IMAGE> |
