Plate heat exchanger
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United States of America Patent
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-
Apr 10, 1990
Grant Date -
N/A
app pub date -
Dec 12, 1988
filing date -
Apr 21, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a plate heat exchanger, the heat exchange plates of which have been provided by pressing with a corrugation pattern comprising ridges (19a, 19b) and valleys (20a, 20b), the ridges and valleys of adjacent plates extend in parallel. In each plate interspace the ridges of adjacent plates abut against each other such that the opposing valleys form parallel flow passages in the plate interspace. The ridges of at least some of the heat exchanger plates are provided with depressions (21a, 21b), which form thresholds in the valleys formed on the opposite sides of the plates by the ridges. Thresholds of this kind are formed in the heat exchange plates such that they create a substantially larger flow resistance in the plate interspace for one the heat exchange medium than in the plate interspaces for the other heat exchange medium.
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