초록 ▼

A heat exchanger adapted for use as a hot water radiator for a car heater, or the like, in which a plurality of tubes and a plurality of fins secured thereon extend between two fluid tanks. The fluid tanks each comprise an inner and an outer tank element, both made of synthetic resin. The inner tank

A heat exchanger adapted for use as a hot water radiator for a car heater, or the like, in which a plurality of tubes and a plurality of fins secured thereon extend between two fluid tanks. The fluid tanks each comprise an inner and an outer tank element, both made of synthetic resin. The inner tank element is joined via gaskets with the end portions of the tubes extending therethrough, by means of tube-expansion working, while the outer tank element is united with the inner tank element along corresponding opposed peripheral edges thereof arranged in abutting relation. A pair of partition walls are provided in opposed relation between the inner and outer tank elements, which are joined together in an abutting manner directly or via part of the gasket, to provide a fluid tight partition between an inlet chamber and an outlet chamber defined by the partition walls and the tank elements. The heat exchanger thus has a compact and lightweight construction of a sufficient mechanical strength, easy to assemble and resistant to rust and corrosion.

대표청구항 ▼

A heat exchanger comprising: two inner tank elements each made of synthetic resin, arranged in opposed and spaced relation, each inner tank element having substantially flat opposite end wall surfaces and formed with a plurality of openings; a first and a second outer tank element each made of synth

A heat exchanger comprising: two inner tank elements each made of synthetic resin, arranged in opposed and spaced relation, each inner tank element having substantially flat opposite end wall surfaces and formed with a plurality of openings; a first and a second outer tank element each made of synthetic resin, each outer tank element being united with an associated one of said inner tank elements to define thermal fluid spaces in cooperation therewith, the first outer tank element having an inlet and an outlet for thermal fluid; partition means dividing the thermal fluid space defined by the first outer tank element and the associated inner tank element into an inlet chamber and an outlet chamber, said partition means comprising two partition walls formed integrally on opposed end walls of said first outer tank element and said associated inner tank element, the partition walls having opposed marginal ends thereof united together in an abutting manner; gasket means having tubular bodies fitted in the respective openings of said inner tank elements; a plurality of tubes extending between the inner tank elements, each tube having opposite end portions extending through associated ones of the tubular bodies of the gasket means, said opposite end portions each having at least one portion expanded to urge the respective tubular body against the inner peripheral surface of the corresponding opening in the associated inner tank element so as to have a diameter larger than the remaining portion of the tube to clamp the tubular body between the tube and the inner tank element; and a plurality of fins secured on said tubes, the inner tank elements and associated ones of the outer tank elements thereby having corresponding opposed peripheral edges thereof united together in an abutting manner.