Cooling system with variable duty cycle capacity control
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United States of America Patent
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Jun 24, 2008
Grant Date -
Jul 1, 2004
app pub date -
Dec 8, 2003
filing date -
Jun 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system for a cooling system includes a first sensor for sensing a property indicative of demand for cooling and a controller coupled to the sensor. The controller produces the variable duty cycle control signal in response to the property and causes the compressor and valve to vary a cooling capacity of the cooling system in response to the variable duty cycle control signal. The sensor may sense the pressure, temperature, or both. The valve may be a suction-side pressure regulator or a liquid-side expansion valve of the solenoid or stepper type.
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