Patent ID: 9080283
Filing Date: 2015-07-14
Classification: D06F

Abstract:
1. A method of drying laundry by operating a laundry dryer having a treating chamber for receiving laundry for drying, the method comprising: supplying air to the treating chamber to define a supply air flow; exhausting the supply air flow from the treating chamber to define an exhaust air flow; repeatedly determining over time a temperature of the exhaust air flow to define an exhaust temperature signal; heating the supply air flow by repeatedly cycling a heater for the supply air flow between an ON state, which starts when the exhaust temperature signal satisfies a low temperature set point, and an OFF state, which starts when the exhaust temperature signal satisfies a high temperature set point; determining from the temperature signal a heat time corresponding to a time it takes the exhaust temperature to rise from the low temperature set point to the high temperature set point, and a trip time corresponding to a time the exhaust temperature is above the high temperature set point; determining a ratio between the heat time and the trip time; and initiating a termination of the drying of the laundry when the ratio indicates the laundry is dried.