LIFETIME PREDICTION SYSTEM OF AN ELECTRIC HEATER, CAPABLE OF PREVENTING THE ACCIDENT DURING THE DRIVING OPERATION OF THE HEATER

摘要

PURPOSE: A lifetime prediction system of an electric heater is provided to measure the changed amount of the resistance and the power of heater by comparing with the reference resistance and power of the heater.;CONSTITUTION: A voltage converter(21) measures a voltage which is applied to a heater coil. A current converter(22) measures a current which is applied to the heater coil. A controller(23) predicts the lifetime of the heater coil by comparing the change values of the voltage and the current with the reference power and resistance. The comparison result is output through an output terminal(25). A network interface(24) transmits output signal to an upper level system(30) through a network.;COPYRIGHT KIPO 2010