PHILIP MORRIS PRODUCTS S.A.
|PHILIP MORRIS PRODUCTS S.A. Patent applications|
|Patent application number||Title||Published|
|20150237916||DEVICE AND METHOD FOR CONTROLLING AN ELECTRICAL HEATER TO LIMIT TEMPERATURE - There is provided a method of controlling an electrical heating element, including maintaining a temperature of the heating element at a target temperature by supplying pulses of electrical current to the heating element; monitoring a duty cycle of the pulses of electrical current; and determining if the duty cycle differs from an expected duty cycle or range of duty cycles, and if so, reducing the target temperature, or stopping the supply of current to the heating element or limiting the duty cycle of the pulses of electrical current supplied to the heating element. As the temperature is maintained at a known target temperature, any variation in the duty cycle or range of duty cycles expected to maintain the target temperature is indicative of abnormal conditions.||08-27-2015|
Patent applications by PHILIP MORRIS PRODUCTS S.A.