DETECTION OF ADVERSE HEATER CONDITIONS IN AN ELECTRICALLY HEATED AEROSOL GENERATING SYSTEM

摘要

An electrically operated aerosol-generating system comprising: a heating element (30) for heating an aerosol-forming substrate (34); a power supply (14) for supplying power to the heating element; a temperature sensor for sensing a temperature at the heating element; and electric circuitry in communication with the heating element, the sensor and the power supply, the electric circuitry comprising a memory and being configured to: regulate the supply of power to the heating element based on the measured temperature from the temperature sensor; determine an adverse condition when i) a rate of change of power supplied to the heating element required to reach or maintain a predetermined temperature or ii) a reduction in power supplied to the heating element required to reach or maintain a predetermined temperature over successive heating cycles, falls outside a predefined range, said predefined range being stored in the memory; and control power supplied to the heating element based on whether there is an adverse condition or provide an indication when there is an adverse condition.