High-low superheat protection for a refrigeration system compressor
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United States of America Patent
Stats
-
Jul 9, 1985
Grant Date -
N/A
app pub date -
Apr 6, 1984
filing date -
Apr 6, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and control system are disclosed for operating a refrigeration system to protect the refrigeration system compressor from adverse operating conditions. A first signal indicative of the saturation temperature of the refrigerant in an evaporator of the refrigeration system, and a second signal indicative of the temperature of gaseous refrigerant flowing from the evaporator to the compressor of the refrigeration system compressor, are provided to a microcomputer system which processes the first and second signals to determine the superheat of the gaseous refrigerant flowing to the compressor. The microcomputer system generates an alarm signal to shut down operation of the refrigeration system if the detected superheat is less than a lower limit or greater than an upper limit of a normal range of superheat values.
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