Patent ID: 7290595
Filing Date: 2007-11-06
Classification: F28D,F28F,Y10T

Abstract:
1. An inner fin with cutout window for heat exchanger comprising: a plurality of protruding ridges each formed by a wall portion having sidewalls formed with a cutout window, on front and rear sides of a plate respectively, and extending along a longitudinal direction of the plate with a predetermined width, said front side adjacent protruding ridges sandwiching a front side groove and said rear side adjacent protruding ridges sandwiching a rear side groove to serve as passages of a heat exchange medium that are separated from each other by the wall portion; and a weir portion provided at a bottom of an entrance for the heat exchange medium in the cutout window so as to allow said grooves adjacent to each other to communicate with each other, wherein the weir portion is formed by moving material of a portion of at least one of the sidewalls toward the bottom to accumulate on the bottom and form the weir portion protruding from the bottom in a width direction of the plate so that said weir portion can promote diffluence and stirring of the heat exchange medium.