| 摘要 |
PROBLEM TO BE SOLVED: To obtain a laminate heat exchanger having a satisfactory corrosion resistance so as to prevent a brazed joint part of a core plate from being damaged. SOLUTION: Potential of inside brazing materials 11, 21 is made nobler than that of core materials 13, 23 while potential of outside brazing materials 12, 22 is made baser than that of the core materials 13, 23. Flange shape parts 14b, 24b are provided on openings 14, 24 of core plates 10, 20 whereby brazing and joining are achieved only with the inside brazing materials 11, 21. Hereby, the outside brazing materials 12, 22 serve as a sacrifice corrosion material for the core materials 13, 23 and the inside brazing materials 11, 21 so that corrosion resistance of the core materials 13, 23 and the inside brazing materials 11, 21 is improved, and refrigerant leakage frown a brazed junction part of the core plates 10, 20 is prevented, and further corrosion resistance of the laminate heat exchanger is improved. |
