Electronic vapor provision system
AssigneeNicoventures Trading Limited
InventorsKenny OTIABA, DAVID LEADLEY
Life of this patent
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Abstract
An electronic vapour provision device comprises: a first electrical resistive heater for vaporising a precursor material to generate vapour in an airflow for inhalation by a user and a second electrical resistive heater for vaporising the precursor material and/or heating said airflow. The first electrical resistive heater has a first thermal coefficient of resistance which is less than a second thermal coefficient of resistance of the second electrical resistive heater. The device further includes a control system to monitor for a change in the resistance of at least the second electrical resistive heater. The second electrical resistance heater therefore serves both as a heater and as a temperature monitor.
Claims26
An electronic vapor provision device comprising:
- a first electrical resistive heater for vaporizing a precursor material to generate vapor in an airflow for inhalation by a user;
- a second electrical resistive heater for at least one of vaporizing the precursor material or heating the airflow, wherein the first electrical resistive heater has a first thermal coefficient of resistance which is less than a second thermal coefficient of resistance of the second electrical resistive heater;
- and
- a control system configured to monitor for a change in resistance of at least the second electrical resistive heater,
- wherein the second thermal coefficient of resistance is greater than 1×10−3 K−1 at room temperature.
A method of operating an electronic vapor provision device comprising:
- vaporizing a precursor material using a first electrical resistive heater to generate vapor in an airflow for inhalation by a user;
- using a second electrical resistive heater to accomplish at least one of vaporizing the precursor material or heating the airflow, wherein the first electrical resistive heater has a first thermal coefficient of resistance which is less than a second thermal coefficient of resistance of the second electrical resistive heater;
- and
- monitoring by a control system for a change in resistance of at least the second electrical resistive heater,
- wherein the second thermal coefficient of resistance is greater than 1×10−3 K−1 at room temperature.
(canceled)
Dependencies are inferred from the claim text.