Controlling an electrically actuated refrigerant expansion valve
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United States of America Patent
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Aug 20, 1996
Grant Date -
N/A
app pub date -
Feb 8, 1995
filing date -
Feb 8, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system for generating a pulse width modulated control signal for an electrically operated refrigerant valve. The controller receives inputs from evaporator inlet and outlet temperature sensors (T.sub.in, T.sub.out) and 'fuzzy' logic to compute the discrete value of pulse width change needed, based upon the difference .DELTA.T=T.sub.out -T.sub.in and the time rate of change of .DELTA.T.
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