Patent ID: 7044209

Claim:
A heat exchanger comprising a pair of manifolds and a plurality of flat tubes for heat exchange between a first fluidum flowing inside the flat tubes and a second fluidum flowing outside of the flat tubes, the manifolds receiving ends of the flat tubes and having an inlet and an outlet for introducing the first fluidum into the flat tubes and for discharging therefrom, each manifold comprising a first wall defining a flat outer surface, a second wall defining a curvilinear outer surface, holes in the first wall in which the ends of the flat tubes are received, and at least two adjacent parallel channels with a partition wall therebetween that is oriented substantially perpendicular to the flat outer surface and interconnects the first and second walls, each of the channels being further defined by a curved inner surface portion of the second wall, the partition wall defining two parallel substantially flat surfaces facing the channels, each channel having a perimeter in cross-section defined by a continuous line consisting of curved and straight portions wherein all straight portions of the channels are defined by the partition wall and are perpendicular to the flat outer surface of the first wall.