| 摘要 |
PURPOSE:To prevent generation of corrosion hole at U-bent sections at both ends of a working fluid path by a method wherein the materials for the working fluid path and the core are specified. CONSTITUTION:The aluminum alloy of specified composition, containing Mg: 0.03-0.2%, Mn: 0.31-0.85%, Zn: 0.51-1.0%, is employed as the material of the working fluid path and another aluminum alloy of specified composition, containing Zn: 0.1-5%, Mn: 0.2-2% or Sn: 0.02-0.09%, is employed for the material of the core while the working fluid paths are combined with fins by brazing them with a compound brazing sheet, employing Al-Si series or Al-Si-Mg series fiber material, whereby the core of heat exchanger may be constituted. |
