Frost free heat exchanger.

摘要

A plate fin heat exchanger (10) is provided having: a core (12) having a plurality of warm layers (26) for conducting a warm fluid and a plurality of cold layers (24) for conducting a cold fluid, the warm layers (26) making a first pass parallel to at a front face (14) of the exchanger (10), the front face (14) being first exposed to the cold fluid, and then passing in an essentially counterflow pattern to the flow of the cold fluid through the exchanger (10) from a back face (16) of the exchanger (10) to near the front face (14) thereof; and a baffle (20) disposed at the back face (16) of the heat exchanger (10), the baffle (20) being adapted to create a high pressure profile at the front face (14) such that the cold fluid is distributed upon the front face (14) in such a manner that snow and ice build-up upon the front face (14) is minimized.