Variable speed HVAC without controller and responsive to a conventional thermostat
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United States of America Patent
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Apr 25, 1995
Issued Date -
N/A
app pub date -
Mar 2, 1993
filing date -
May 27, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for conditioning air in a space by heating or cooling the air to change its temperature. A thermostat located within the space generates a two state temperature signal having a cyclic parameter which corresponds to the temperature of the air in the space as it rises and falls. A compressor supplies refrigerant to a heat exchanger by means of which changes are made in the temperature of the air. A variable speed motor drives the compressor in response to a motor control signal. A controller responds to the temperature signal and senses the cyclic parameter of the temperature signal. The controller generates the motor control signal as a function of the sensed cyclic parameter whereby the motor control signal is provided to the motor to control the torque or speed of the motor.
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