U-flow heat exchanger tubing with improved fluid flow distributi

Heat exchange – Side-by-side tubular structures or tube sections – With manifold type header or header plate

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Details

165153, 165174, F28D 103

Patent

active

051118785

ABSTRACT:
An evaporator for an automotive air conditioner having a plurality of U-flow tubes therein arranged side by side so that spaces are provided for air centers secured between the sidewalls of the tubes. Each tube is formed from a pair of identical plates that have a centralized divider rib that separates the tubes into separate side flow passages joined by a lower interconnecting crossover passage. The tubes have a plurality of flow ribs indented and joined in a predetermined pattern therein to form discrete fluid flow sections within each tube. The ribs are interconnected in such a manner that the sections effectively direct and tailor the flow of the heat exchanger fluid to a lower and intermediate section of the tube at the turning of the flow from one section to another to reduce, or substantially eliminate, dry out areas in each tube, thereby increasing heat exchanger tube and evaporator efficiency.

REFERENCES:
patent: 4781248 (1988-11-01), Pfeiffer
patent: 4800954 (1989-01-01), Noguchi et al.
patent: 4915163 (1990-04-01), Matsunaga et al.

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