Patent ID: 8225853
Filing Date: 2012-07-24
Classification: F25B,F28D,F28F

Abstract:
1. A multi-pass heat exchanger comprising: a return manifold having a partition, a front wall, and a rear wall, said partition separating said return manifold into a collection chamber and a distribution chamber, said front and rear walls defining a fluid channel, said front wall having a plurality of perforations on both sides of said partition placing said fluid channel in separate fluid communication with said collection chamber and said distribution chamber; a first pass of tubes in fluid communication with said collection chamber; and a second pass of tubes in fluid communication with said distribution chamber; an inlet manifold divided into an inlet chamber and an outlet chamber by a second partition, said inlet chamber being in fluid communication with said first pass of tubes, and said outlet chamber being in fluid communication with said second pass of tubes; an internal distributor within said inlet chamber of said inlet manifold, said internal distributor having a series of orifices that distribute fluid into said inlet chamber of said inlet manifold; wherein said plurality of perforations comprise only one perforation associated with each tube in said first pass of tubes and only one perforation associated with each tube in said second pass of tubes.