HEAT EXCHANGER AND REFRIGERATOR USING HEAT EXCHANGER FOR CONDENSER OR EVAPORATOR

摘要

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of reducing risks of leakage of refrigerant from a refrigerant pipe and ensuring low cost, and a refrigerator using the heat exchanger for a condenser or an evaporator.SOLUTION: A heat exchanger 10 comprises: a refrigerant pipe 11 formed such that one pipe member having an outer protection coating layer formed outside by performing a cladding treatment on a core material made of an aluminum alloy with an aluminum alloy having a potential baser than that of the aluminum alloy of the core material is curved in a meander fashion so that straight pipe portions 12 and U-shaped curved pipe portions 13 are alternately continuous, and in which a plurality of straight pipe portions 12 are arranged equidistantly in parallel on a plurality of flat surfaces P (P1 to P3) arranged in parallel including one flat surface P1; and a plurality of radiation fins 20 each having a long hole 21 into which the curved pipe portion 13 arranged on one side of the refrigerant pipe 11 is inserted, and formed of aluminum plate materials provided at predetermined intervals along a longitudinal direction of the straight pipe portions 12 and arranged in parallel. The straight pipes 12 adjacent each other are engaged with longitudinal both ends of the long holes 21.