Parallel-flow heat exchanger has been widely used in automotive air-conditioning system as the condenser, in recent years has been applied to the evaporator, home air conditioners, refrigerators, and many other areas, to replace the conventional finned-round-tube heat exchanger. 平行流换热器已广泛应用于汽车空调系统中的冷凝器,近年来又被推广应用到蒸发器、家用空调、冰箱等很多领域,以取代传统的翅片圆管换热器。