HEAT EXCHANGER

摘要

A heat exchanger 2 includes front and rear heat exchange sections (10) and (11). The front heat exchange section includes a pair of header tanks 12A and 12B spaced apart from each other and a plurality of heat exchange tubes 14 disposed between the header tanks 12A and 12B. The rear heat exchange section includes a pair of header tanks 13A and 13B spaced apart from each other and a plurality of heat exchange tubes 14 disposed between the header tanks 13A and 13B. Paths 37A and 37B, each composed of a plurality of heat exchange tubes 14 successively arranged, are provided in the heat exchange sections (10) and (11) at the same position so as to correspond to each other. A fluid flows in the same direction through heat exchange tubes 14 which constitute each of the paths 37A and 37B. The flow direction of the fluid in the path 37A of the heat exchange section 10 and that in the path 37B of the heat exchange section 11 are opposite each other. When this heat exchanger 2 is used for heating to-be-conditioned air in a supercritical heating cycle using CO<SUB>2</SUB> as a heat carrier, it is possible to effectively prevent generation of nonuniform distribution of the blowout temperature of conditioned air.