HEAT EXCHANGER MADE OF ALUMINUM ALLOY AND METHOD OF PRODUCING SAME
First Claim
1. A heat exchanger made of an assembly including a tube, a fin, and a header pipe, whereinthe tube is made of aluminum alloy having a composition containing, in mass 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance consisting of Al and unavoidable impurities;
- a coating of a brazing composition that is coated on a surface of the tube to which the fin is joined and contains 1.0 to 5.0 g/m of Si powder, 4.0 to 10.0 g/m2 of Zn containing flux composed of KZnF3, and 0.5 to 3.0 g/m2 of binder;
the fin is made of aluminum alloy containing, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, one or two or more elements selected from the group consisting of 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance consisting of Al and unavoidable impurities;
the header pipe comprises a core material, outer sacrificial corrosion protection material, and an inner brazing material; and
the fin is joined to the tube, and the tube is joined to the header pipe by brazing in the heat exchanger.
1 Assignment
0 Petitions
Accused Products
Abstract
A heat exchanger comprising a tube, a fin, and a header pipe, wherein the tube contains, in mass %, 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance of Al and unavoidable impurities, and is coated with a coating of brazing composition containing 1.0 to 5.0 g/m2 of Si powder, 4.0 to 10.0 g/m2 of KZnF3, and 0.5 to 3.0 g/m2 of binder; the fin contains, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, one or two or more selected from 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance of Al and unavoidable impurities; and the header pipe comprises a core material, outer sacrificial corrosion protection material, and an inner brazing material.
56 Citations
6 Claims
-
1. A heat exchanger made of an assembly including a tube, a fin, and a header pipe, wherein
the tube is made of aluminum alloy having a composition containing, in mass 0.15 to 0.45% of Mn, 0.20 to 0.50% of Si, and the balance consisting of Al and unavoidable impurities; - a coating of a brazing composition that is coated on a surface of the tube to which the fin is joined and contains 1.0 to 5.0 g/m of Si powder, 4.0 to 10.0 g/m2 of Zn containing flux composed of KZnF3, and 0.5 to 3.0 g/m2 of binder;
the fin is made of aluminum alloy containing, in mass %, 1.20 to 1.80% of Zn, 0.70 to 1.20% of Si, 0.30 to 0.80% of Fe, 0.90 to 1.50% of Mn, one or two or more elements selected from the group consisting of 0.05 to 0.20% of Zr, 0.01 to 0.10% of V, and 0.01 to 0.10% of Cr, and the balance consisting of Al and unavoidable impurities; the header pipe comprises a core material, outer sacrificial corrosion protection material, and an inner brazing material; and the fin is joined to the tube, and the tube is joined to the header pipe by brazing in the heat exchanger. - View Dependent Claims (2, 3, 4, 5, 6)
- a coating of a brazing composition that is coated on a surface of the tube to which the fin is joined and contains 1.0 to 5.0 g/m of Si powder, 4.0 to 10.0 g/m2 of Zn containing flux composed of KZnF3, and 0.5 to 3.0 g/m2 of binder;
Specification