Controlling refrigeration
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United States of America Patent
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-
Feb 9, 1999
Grant Date -
N/A
app pub date -
Feb 10, 1997
filing date -
Feb 10, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A controller operates an electronic expansion valve (EEV) to control flow of refrigerant in an evaporator coil of a refrigeration system. The controller measures a superheat of the coil over a natural fill and boil cycle of the coil to determine an average rate at which the flow of refrigerant into the coil produces a desired temperature difference across the coil. The controller then operates the valve in a manner to control the flow of refrigerant based on the average rate.
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