| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum heat exchanger for an air conditioner, which can maintain long term corrosion resistance even under severe use in corrosive environment and further has high performance, is made light in weight and has high durability.SOLUTION: An aluminum flat heat exchanger tube 3 having a plurality of heat medium flow passages has a composition containing Fe of 0.15 to 0.35 mass%, Si of 0.15 mass% or less, Cu of 0.35 to 0.55 mass%, Zr of 0.02 to 0.05 mass%, Ti of 0.003 to 0.010 mass% and the balance comprising Al and unavoidable impurities. Aluminum corrugated fin 4 comprises a core member 4a and brazing sheet cladded with covering material 4b at both surfaces of the core member, the core member has a composition containing Zn of 1.3 to 2.2 mass% and the balance comprising Al and unavoidable impurities, the covering material has a composition containing Zn of 0.7 to 1.3 mass% and the balance comprising composition of Al and unavoidable impurities. |
