| 摘要 |
PURPOSE: To improve the brazing property of the laminated heat exchanger which is integrally produced by brazing. CONSTITUTION: A clad material formed by cladding both sides of a core material equivalent to A3003 with a brazing filler metal equivalent to A4104 is used as the material for the plates 4 to 6 constituting a refrigerant-refrigerant heat-exchanger part A of a refrigerant evaporator 1, the capillary plate 7 forming a throttle part 7a and the plates 8 and 9 constituting a refrigerant-air heat-exchanger part B. However, the Mg content of the brazing filler metal used in the clad material for the refrigerant-refrigerant heat exchanger part A is decreased as compared with that for the refrigerant-air heat-exchanger part B. Concretely, the Mg content of the brazing filler metal used in the clad material for the part B is controlled to 1.2wt.% and that for the part A to 0.8wt.%. |
