Patent ID: 6199750
Filing Date: 2001-03-13
Classification: B23K,F28D,F28F

Abstract:
A method of manufacturing a core for use in a heat exchanger, said method comprising steps of:coating top peaks of a corrugated outer fin with flux;attaching two tube plates to both side of said corrugated outer fin so that an outer surface thereof is brought into contact with the top peaks of said corrugated outer fin thereby preparing a sandwich unit comprising said outer fin and said two tube plates;repeating said coating step and said attaching step so as to prepare a plurality of sandwich units;coating butt bead surfaces on the tube plates on both sides of said respective sandwich unit with the flux;stacking said plurality of sandwich units of which tube plates are coated with the flux; andheating stacked sandwich units so as to braze together said tube plates and said outer fins, to thereby manufacture the core for use in the heat exchanger.