Electronic vapor provision system
First Claim
Patent Images
1. An electronic vapor provision system comprising:
- a pressure drop or air flow sensor for monitoring inhalation by a user through the electronic vapor provision system; and
a control unit for detecting the start and end of an inhalation based on readings from the sensor;
wherein the control unit is configured to;
detect the start of an inhalation when the reading of the sensor departs by more than a first pressure or air flow based threshold from a previous reading of the sensor; and
detect the end of the inhalation when the reading of the sensor departs by less than a second pressure or air flow based threshold from the previous reading of the sensor;
wherein the first pressure or air flow based threshold is greater than the second pressure or air flow based threshold.
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Abstract
An electronic vapor provision system is provided including: a pressure drop or air flow sensor for monitoring inhalation by a user through the electronic vapor provision system; and a control unit for detecting the start and end of inhalation based on readings from the sensor. The control unit is configured to: monitor the cumulative period of inhalation (Ti) over a predetermined window (Tw); and transfer the electronic vapor provision system to a sleep mode if the cumulative period (Ti) exceeds a predetermined threshold (Th).
73 Citations
22 Claims
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1. An electronic vapor provision system comprising:
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a pressure drop or air flow sensor for monitoring inhalation by a user through the electronic vapor provision system; and a control unit for detecting the start and end of an inhalation based on readings from the sensor; wherein the control unit is configured to; detect the start of an inhalation when the reading of the sensor departs by more than a first pressure or air flow based threshold from a previous reading of the sensor; and detect the end of the inhalation when the reading of the sensor departs by less than a second pressure or air flow based threshold from the previous reading of the sensor; wherein the first pressure or air flow based threshold is greater than the second pressure or air flow based threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17)
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12. An electronic vapor provision system comprising:
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a pressure drop or air flow sensor for monitoring inhalation by a user through the electronic vapor provision system; and a control unit for detecting the start and end of inhalation based on readings from the sensor, wherein the control unit is configured to; monitor the period of an inhalation; if the period of the inhalation exceeds a first threshold; render the electronic vapor provision system inactive for a predetermined period; render the electronic vapor provision system active after the predetermined period has expired; monitor the period of the next inhalation such that if the period of the inhalation exceeds the first threshold and the period of the next inhalation exceeds a second threshold; transfer the electronic vapor provision system to a sleep mode. - View Dependent Claims (13, 14, 15, 16)
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18. An electronic vapor provision system comprising:
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a pressure drop or air flow sensor for monitoring inhalation by a user through the electronic vapor provision system; and a control unit for detecting the start and end of inhalation based on readings from the sensor; wherein the control unit is configured to; monitor the cumulative period of inhalation (Ti) over a predetermined window (Tw); and transfer the electronic vapor provision system to a sleep mode if the cumulative period (Ti) exceeds a predetermined threshold (Th), wherein upon entering the sleep mode, one or more components of the system must be disengaged and re-engaged to transfer the system from the sleep mode to a user mode. - View Dependent Claims (19, 20, 21)
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22. A method of operating an electronic vapor provision system comprising a control unit for detecting a start and an end of inhalation by a user through the electronic vapor provision system and a pressure sensor for monitoring inhalation by a user through the electronic vapor provision system, the method comprising:
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monitoring inhalation by a user through the electronic vapor provision system by the pressure sensor; detecting by the control unit the start of inhalation when a pressure reading from the pressure sensor differs by more than a first threshold from a previous pressure reading of the pressure sensor; and detecting by the control unit the end of inhalation when a pressure reading from the pressure sensor differs by less than a second threshold from the previous pressure reading, wherein the first threshold is greater than the second threshold.
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Specification