Patent ID: 7900689
Filing Date: 2011-03-08
Classification: B23P,F28D,Y10T

Abstract:
1. A heat exchanger assembly comprising; an upper header extending along an upper centerline, a lower header extending along a lower centerline, said headers being spaced from one another with said centerlines thereof being parallel and extending through parallel bends, said upper header defining a plurality of upper tube slots being spaced along said upper centerline, said lower header defining a plurality of lower tube slots being spaced along said lower centerline and aligned with said upper tube slots, a plurality of tubes extending between said upper and lower tube slots and disposed in first and second groups, an air fin disposed between and engaging adjacent tubes in each of said groups and extending between said upper and lower headers, a bend relief spacer disposed between the end tubes of adjacent groups and having a first leg engaging the end tube of said first group and a second leg engaging the end tube of said second group and at least one cross member interconnecting said legs, wherein said legs of said bend relief spacer include front and rear edges as viewed in cross section, wherein said tubes have a cross section defining spaced flat sides and rounded ends, and feet extending along and from said edges of said legs to cradle the rounded ends of said end tubes for brazing.