Patent ID: 9746258
Date: 2017-08-29
CPC Classifications: B01D,F25B,F28F

Claim:
1. A contamination barrier for protecting a heat exchanger unit comprising fins that are in thermal contact with at least one tube and are spaced so that there is a distance between adjacent pairs of the fins, the contamination barrier comprising: a filtration media having a lofty high-weave configuration that forms wave patterns that differ in direction from air flowing through the heat exchanger unit and forms openings with sizes that correspond to the distance between the adjacent pairs of the fins of the heat exchanger unit to prevent passage therethrough of coarse contaminants of a size that would be entrapped within the heat exchanger unit but allow passage therethrough of finer contaminants that are sufficiently small to pass entirely through the heat exchanger unit so as to transfer accumulation of the coarse contaminants from within the heat exchanger unit to the filtration media; wherein the lofty high-weave configuration causes the air flowing through the filtration media to flow around and behind obstructions created by the coarse contaminants accumulated in the filtration media to thereby minimize total pressure drop through the barrier and reduce the need for cleaning the contamination barrier.