HEAT EXCHANGER AND REFRIGERATION CYCLE DEVICE PROVIDED WITH SAME

摘要

To obtain a heat exchanger in which inner wall surfaces of refrigerant passed through which a first refrigerant and a second refrigerant flow are constituted by a different metal and in which a heat exchange performance is improved. Second-refrigerant heat-transfer tubes (3a) that are formed with a metal different from a heat transfer block (1) are each passed through a corresponding second-refrigerant heat-transfer-tube insertion hole (3b), the second-refrigerant heat-transfer tubes (3a) are formed with a metal with a different material from that of the heat transfer block (1).