Variable speed fan motor control for forced air heating/cooling system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 3, 2004
Issued Date -
N/A
app pub date -
May 15, 2000
filing date -
Feb 18, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A forced air heating and/or cooling system utilizing an induction type fan motor is controlled by a controller circuit which is operable to continuously vary the speed of the fan motor during a start-up phase and a shut-down phase of the heating and/or cooling cycle. The controller circuit includes terminals for connection to the source of electrical energy for the heating and/or cooling system and for connection to the system controls without altering the control function or circuitry thereof. The controller circuit includes temperature sensors which are operable to control start-up and shutdown of the fan motor over continuously variable speed operating cycles in response to sensed temperature of the air being circulated by the fan.
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