D - Textiles – Paper – 06 – F
Patent
D - Textiles, Paper
06
F
D06F 58/28 (2006.01)
Patent
CA 2364219
A control circuit for a clothes dryer operating with a 120 volt power supply compensates for changes in the ambient temperature to compensate for premature advancement of the dryer timer motor during an automatic drying cycle. The control circuit has a thermally biased low outlet thermostat and a thermally biased high outlet thermostat which control the energization of a heater in the dryer. The low outlet thermostat and the high outlet thermostat each open circuit at respective lower and higher predetermined temperatures when the outlet air flow from the dryer drum reaches the lower or higher respective predetermined temperatures to thereby de-energize the heater and advance the timer motor. The control circuit includes a thermally biased ambient thermostat that is normally open and unbiased, and that switches control of the heater energization from the low output thermostat to the high outlet thermostat when thermally biased and when the ambient temperature rises above a predetermined ambient temperature. The ambient thermostat becomes thermally biased when the low output thermostat is open circuited. Both the low and high output thermostats are normally thermally biased during the automatic drying cycle and are un-biased during user time selected drying cycles so that the low and high temperature thermostats cycle on and off at higher temperatures than they would during the automatic drying cycle.
Camco Inc.
Craig Wilson And Company
LandOfFree
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