Patent ID: 9012033
Filing Date: 2015-04-21
Classification: B32B,C22C,F28D,F28F,Y10S,Y10T

Abstract:
1. An aluminum alloy clad sheet for a tube material of a heat exchanger, comprising a core material, a first cladding material provided on a first side of the core material and second cladding material provided on a second side of the core material opposite to the first side, the core material comprising 0.5-1.2% of Si, 0.2-1.0% of Cu, 1.0-1.8% of Mn and 0.05-0.3% of Ti, with the balance being Al and unavoidable impurities, the first cladding material comprising 3-5% of Si, 2-8% of Zn and 0.3-1.8% of Mn, with the balance being Al and unavoidable impurities and the second cladding material comprising 6-13% of Si, with the balance being Al and unavoidable impurities, all of the % being mass %, characterized in that the aluminum alloy clad sheet is formed so that the first cladding material forms a convex surface and the second cladding material forms a concave surface and a refrigerant tube is assembled by placing two of the aluminum alloy clad sheets such that their concave surfaces face each other and are brazed so that the first cladding material comes into contact with air and the second cladding material comes into contact with a refrigerant.