Patent ID: 6523605
Filing Date: 2003-02-25
Classification: F28F,Y10S,Y10T

Abstract:
A heat exchanger made of a first aluminum alloy having a radiator part and an oil cooler part in combination and manufactured integrally by a brazing method, wherein a refrigerant tank for covering and sealing said oil cooler part is made of said first aluminum alloy,wherein said oil cooler part comprises brazing sheets, said oil cooler part and said brazing sheets are clad with a filler material, and wherein said oil cooler part is brazed in said tank; said filler material is a second aluminum alloy containing Si in an amount from more than 7.0 wt % to 12.0 wt %, Cu in an amount from more than 0.4 wt % to 8.0 wt %, Fe in an amount from more than 0.05 wt % to 0.5 wt %, one or more elements selected from a group consisting of Zn in an amount from more than 0.5 wt % to 6.0 wt %, In in an amount of 0.3 wt % or less, and Sn in an amount of 0.3 wt % or less; and one or more elements selected from a group consisting of Li in an amount of 1.0 wt % or less, Na in an amount of 0.2 wt % or less, K in an amount of 0.2 wt % or less, Ca in an amount of 0.2 wt % or less, Sr in an amount of 0.2 wt % or less, Ba in an amount of 0.2 wt % or less, Bi in an amount of 0.5 wt % or less, Be in an amount of 0.2 wt % or less, Ni in an amount of 0.6 wt % or less, Cr in an amount of 0.2 wt % or less, Ti in an amount of 0.2 wt % or less, Zr in an amount of 0.2 wt % or less, V in an amount of 0.2 wt % or less, and one or more elements selected from a group consisting of Ga in an amount of 1.0 wt % or less, and Ge in an amount of 2.0 wt % or less: the balance being Al and inevitable impurities, and wherein said refrigerant tank is assembled integrally with said radiator part and said oil cooler part by brazing with said brazing material.