Patent ID: 6889758

Claim:
A stacked plate heat exchanger comprising: a plurality of stacked plate pairs, each plate pair including first and second plates having elongate central portions surrounded by sealably joined edge portions with an elongate fluid passage defined between the central portions; each plate pair having spaced apart inlet and outlet openings in flow communication with the fluid passage, at least some of the plate pairs having a substantially planar fin plate extending peripherally outward from the joined edge portions, the fin plates of the stacked plate pairs being spaced apart and substantially parallel to each other; wherein for each of the at least some plate pairs, the planar fin plate has a first fin end and a second fin end and first and second spaced apart elongate edges extending there between, the fluid passage being located between the spaced apart edges and having a first fluid passage end located closer to the first fin end than the second fin end and a second fluid passage end located closer to the second fin end than the first fin end, the fluid passage being orientated at an angle relative to the first elongate edge of the fin plate with one of said first and second fluid passage ends being located closer to the first elongate edge than the other of said first and second fluid passage ends, the fluid passages of the plate pairs all being orientated in a common direction.