Abstract: An evaporator for an automotive air conditioning refrigerant circuit is disclosed. The evaporator includes a plurality of flat pipes through which refrigerant flows, and corrugated metal sheets are disposed between the flat pipes. A plurality of linking members are hermetically fixed at both opening ends of the flat pipes and are also heremetically fixed to each other to facilitate communication between adjacent flat pipes.

Abstract: A serpentine type heat exchanger for use in, for example, an evaporator or condenser in an automobile air conditioner comprises a flat tube provided with a plurality of refrigerant passages therein and bent to form a serpentine tortuous cross section. Corrugated fin units which are folded into wavy form are attached to adjacent parallel portions of the flat tube. The serpentine tortuous flat tube consists of a plurality of parallel portions spaced apart from each other in the longitudinal direction of the tube and a plurality of connecting portions each connecting with two of the adjacent parallel portions. Each connecting portion consists of a plurality of arc shaped segments and at least one central connecting segment. Therefore, the height of the heat exchanger is reduced without reducing the heat exchanging area.