Patent ID: 6964296

Claim:
An aluminum heat exchanger, comprising: first and second headers; at least one flattened tube extending between and in fluid communication with said headers and defining a plurality of generally parallel tube runs in spaced relation to one another; each said tube runs having opposite edges defining a tube major dimension and interconnecting side walls defining a tube minor dimension and a plurality of interior ports; a plurality of plate fins arranged in a stack and each having a plurality of open ended tube run receiving slots, one for each tube run, each slot having a shape generally that of the cross-section of the tube run to be received therein, a width equal to or just less than the minor dimension of the corresponding tube run and a depth somewhat less than the major dimension of the corresponding tube run; each said tube run being nested within corresponding slots in said fins with one of said side walls of each tube run located outwardly of the slots in which it is received; and said headers, said tube runs and said fins comprising a brazed assembly; wherein said fins are curved at locations between said slots.