Abstract: A fin collar having a shape that enhances flux application and brazing clad flow into the tube to fin joint to provide an improved thermal and structural bond.

Abstract: A fin collar having a shape that enhances flux application and brazing clad flow into the tube to fin joint to provide an improved thermal and structural bond.

Abstract: A header (10) for a heat exchanger (1). The header (10) has an outer elongate member (20) with a curved section that has a plurality of ferrules (30) projecting inwardly. An inner elongate member (60) is adapted to mate with the outer elongate member (20). The inner elongate member (60) has first and second ends (26, 28) and a plurality of teeth (72) proximate at least one of the first and second ends (26, 22). The teeth (72) at least partially cooperate with the ferrules (30) when the outer elongate member (20) engages the inner elongate member (60). A heat exchanger (1) incorporating the two-piece headers (10) is also disclosed.

Abstract: An improved heat exchanger (60) includes plural relatively flat conduits (62) adapted to accommodate passage of heat transfer fluid therethrough. Each conduit (62) has inlet and outlet openings, a supply channel (100) communicating with the corresponding inlet opening to direct heat transfer fluid flowing through the corresponding inlet opening into the corresponding conduit (62), a drain channel (102) communicating with the corresponding outlet opening to direct heat transfer fluid out of the corresponding conduit (62) through the corresponding outlet opening, and plural heat transfer channels (92) communicating between the supply and drain channels (100, 102) to direct heat transfer fluid therebetween in a generally transverse direction relative to respective major axes of the supply and drain channels (100, 102). The supply and drain channels (100, 102) each have a substantially greater length and cross-sectional area than the length and cross-sectional area of each heat transfer channel (92).