Control system for clothes dryer

Claim 1

A control system for a clothes dryer which comprises: an exhaust temperature detectng means for detecting the temperature of hot air vented from the dryer; a comparing means for outputting a signal when either the exhaust temperature represented by an output from the detecting means or the rate of change in exhaust temperature attains a value higher than a predetermined value; a first timer means for counting the time elapsed from the start of operation up until the generation of the signal from the comparing means; a calculating means for determining the length of time from a time when an electric power is initially supplied to a heater until such time that clothes are dried to a predetermined dryness, in correspondence to the time counted by the first timer means; a temperature adjusting means capable of generating, when the exhaust temperature is higher than the predetermined value, an output signal necessary to cause a first control means to interrupt the supply of the electric power to the heater; a second timer means for generating an output upon the termination of the length of time determined by the calculating means, said second timer means ceasing a counting operation during a period in which the temperature adjusting means generates said output signal which interrupts the supply of electric power to the heater; and a second control means operable in response to the output from the second timer means for deenergizing both the the heater and a motor used to drive a drum for accommodating the clothes to be dried.