Heat exchanger
AssigneeNippondenso Co., Ltd.
InventorsHiroaki Toge, Shinichi Esaka, Yutaka Murakami, Toshiaki Murao
Life of this patent
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Abstract
A heat exchanger of this invention used as a radiator for an automotive vehicle has a core plate having a holding groove around its periphery for receiving a seal member as well as a flange of a tank member, wherein a concave-convex portion is formed in the outer surface of the outer or inner side wall forming the holding groove. According to this structure, an excess molten solder is gathered toward the concave-convex portion when the core plate is heated for soldering in a heat furnace. This prevents the excess solder from making a drop-shaped mass which has an adverse influence on a seal efficiency of the seal member.
Claims12
A heat exchanger comprising;
- a plastic tank member having a flange portion at its open end;
- a core unit having tubes and fins connected with each other by soldering;
- a core plate fixed to said core unit, said core plate having an inner side wall, a bottom wall and an outer side wall to thereby form a holding groove for receiving said flange portion, said core plate having also a plurality of hooks extending from said outer side wall, said hooks being bent over said flange portion to fix said tank member to said core plate;
- and
- a seal member disposed in said holding groove and between said bottom wall and said flange portion;
- wherein the improvement comprises;
- a concave-convex portion formed in an outer surface of at least one of said inner side wall, outer side wall and hook of a size such that the solder will be attached thereto by surface tension during said soldering to leave the core plate substantially solder free.
Dependencies are inferred from the claim text.