Devices, systems, and methods for sensing temperature in induction heating systems
AssigneePhilip Morris Products S.A.
InventorsAndrew L. Bleloch, Neeraj S. Bhardwaj, Matthew Greenfield, Peter Nysen
Life of this patent
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Abstract
Provided is a system for sensing temperature in an induction heating system. The system includes an induction element, a susceptor element, and a temperature sensor circuit in thermal contact with the susceptor element. The temperature sensor circuit includes a capacitor having a capacitance value equal to C and an inductor having an inductance value equal to L. A resonant frequency of the temperature sensor circuit changes based on a temperature of the susceptor element and the induction element is electromagnetically coupled to the temperature sensor. The resonant frequency of the temperature sensor circuit is equal to ½π√LC.
Claims18
A system for sensing temperature in a vaporizer device, the system comprising:
- an induction element;
- a susceptor element;
- a temperature sensor circuit in thermal contact with the susceptor element, the temperature sensor circuit comprising:
- a capacitor having a capacitance value equal to C, and
- an inductor around the capacitor, the inductor having an inductance value equal to L,
- wherein a resonant frequency of the temperature sensor circuit changes based on a temperature of the susceptor element,
- wherein the induction element is electromagnetically coupled to the temperature sensor circuit, and
- wherein the resonant frequency of the temperature sensor circuit is equal to:
- ½π√{square root over (LC)};
- and
- control circuitry configured to:
- determine a first resonant frequency of the temperature sensor circuit when the susceptor element is heated by the induction element,
- determine a second resonant frequency of the temperature sensor circuit when the susceptor element is heated by the induction element, and
- determine a temperature of the susceptor element based on a change in the resonant frequency of the temperature sensor circuit from the first resonant frequency to the second resonant frequency.
A system for sensing temperature in a vaporizer device, the system comprising:
- an induction element;
- a susceptor element;
- a temperature sensor circuit in thermal contact with the susceptor element, the temperature sensor circuit comprising:
- a capacitor, and
- an inductor adjacent the capacitor, the inductor being electromagnetically coupled to the capacitor,
- wherein a resonant frequency of the temperature sensor circuit changes based on a temperature of the susceptor element, and
- wherein the induction element is electromagnetically coupled to the temperature sensor circuit;
- and
- control circuitry configured to:
- determine a first resonant frequency of the temperature sensor circuit when the susceptor element is heated by the induction element,
- determine a second resonant frequency of the temperature sensor circuit when the susceptor element is heated by the induction element, and
- determine a temperature of the susceptor element based on a change in the resonant frequency of the temperature sensor circuit from the first resonant frequency to the second resonant frequency.
A system for sensing temperature in a vaporizer device, the system comprising:
- a susceptor element;
- a temperature sensor circuit in contact with the susceptor element, the temperature sensor circuit comprising:
- a capacitor, and
- an induction coil adjacent the capacitor;
- and
- at least one processor interconnected with the temperature sensor and being configured to:
- determine a first resonant frequency of the temperature sensor circuit when the susceptor element is heated by the induction coil,
- determine a second resonant frequency of the temperature sensor circuit when the susceptor element is heated by the induction coil, and
- determine a temperature of the susceptor element based on a resonant frequency of the temperature sensor circuit from the first resonant frequency to the second resonant frequency.
Dependencies are inferred from the claim text.