Patent ID: 7140107
Filing Date: 2006-11-28
Classification: F28D,F28F,Y10T

Abstract:
1. A method for manufacturing a stacking-type, multi-flow, heat exchanger comprising a plurality of heat transfer tubes and a plurality of outer fins, which are stacked alternately, each heat transfer tube being formed by connecting a pair of tube plates to form a fluid passage in each of heat transfer tubes, each of said heat transfer tubes comprising an inner fin, which extends in a longitudinal direction of said pair of tube plates, in said fluid passage, in said method comprising the steps of: disposing said pair of tube plates so as to oppose each other; inserting an inner-fin forming material between said pair of opposing tube plates; stacking said pair of tube plates with respect to each other, so as to nip said inner-fin forming material between said pair of tube plates; and cutting said inner-fin forming material and edge portions of said pair of tube plates simultaneously.