D - Textiles – Paper – 06 – F
Patent
D - Textiles, Paper
06
F
342/13, 340/159,
D06F 58/28 (2006.01) G05D 23/24 (2006.01)
Patent
CA 2032857
PA-5741-0-DR-USA ABSTRACT A control for a clothes dryer with an induction drive motor and an electric resistance heater element. A single sense winding is threaded through sensors monitoring drive motor current and heater current, generating an output voltage each time the alternating motor or heater current passes through a zero-crossing. The control monitors the ON/OFF condition of the heater and samples the lagging phase angle of the motor current, and provides an improved means of detecting when the clothes load is dry. The control provides a clothes cool- down period with controlled moisture regain as per the user dryness selection. Numerous heater related diagnostic condi- tions are monitored at the start of each cycle, or, through- out each cycle, including: heater ground fault detection; 208 or 240 VAC service voltage identification; heater open/short circuit detection; open door detection; heater box thermostat cycling; and restricted air flow detection. - 2 -
Corporation Whirlpool
Kirby Eades Gale Baker
LandOfFree
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