Patent ID: 7828049

Claim:
A heat exchanger comprising: a pair of headers disposed in parallel and oppositely, a first side plate connecting first ends of said pair of headers, a second side plate connecting second ends of said pair headers, said second side plate disposed in parallel to said first side plate, a plurality of parallel first tubes communicating with said pair of headers, said first tubes adapted to have a first medium flowing therethrough, a plurality of parallel second tubes communicating with said pair of headers, said plurality of second tubes being disposed in a region nearer said second side plate, said second tubes having a cross-sectional shape identical to that of said first tubes, said second tubes adapted to have a second medium flowing therethrough, and a return pipe communicating with said second tubes through one of said headers; wherein said second side plate has a base portion disposed in parallel to said second tubes, and opposing side walls depending from said base portion, and said return pipe being disposed between said side walls.