Patent ID: 7721794
Filing Date: 2010-05-25
Classification: F28D,F28F

Abstract:
1. A heat exchanger assembly for use as a residential/industrial heating, ventilation, air conditioning refrigeration system that lies in the path of oncoming air, the assembly comprising: a plurality of heat transfer tubes; a plurality of fins, at least some of which being in contact with the plurality of heat transfer tubes; at least some of the plurality of fins having a predetermined array in which one or more fins has a predetermined pattern of louvers, the geometry of which is characterized by a dimensionless parameter F that is a function of louver pitch P wherein the tubes have longitudinal axes at a tube center thereof and the predetermined pattern of louvers associated with a fin is defined in relation to the centers of adjacent tube holes in the fins that receive the tubes, such that the louvers have end portions that lie at a constant radial distance r