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1. WO2020183138 - SYSTÈME DE FOURNITURE DE VAPEUR ET PROCÉDÉ CORRESPONDANT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1 . A vapour provision system comprising:

a heating element for generating a vapour from a vapour precursor material; and control circuitry configured to provide power for the heating element for performing a heating operation to generate the vapour and to compare a measurement of a resistance value for the heating element for the heating operation with a predetermined threshold resistance value for the heating element for use in detecting a fault condition, wherein the control circuitry is further configured to:

monitor the resistance of the heating element during at least one heating operation of the heating element to determine a plurality of monitored resistance values over a period of time;

compare each of the plurality of monitored resistance values with the predetermined threshold resistance value; and

detect a fault condition for the heating element based on the comparison of the plurality of monitored resistance values with the predetermined threshold resistance value.

2. A vapour provision system according to claim 1 , wherein the control circuitry is configured to detect a fault condition for the heating element in the event a plurality of the monitored resistance values exceed the predetermined threshold resistance value during the period of time.

3. A vapour provision system according to claim 2, wherein the plurality of the monitored resistance values which exceed the predetermined threshold resistance value are consecutive.

4. A vapour provision system according to claim 2 or 3, wherein the plurality of the monitored resistance values which exceed the predetermined threshold resistance value comprises at least two monitored resistance values which exceed the predetermined threshold resistance value.

5. A vapour provision system according to claim 4, wherein the plurality of the monitored resistance values which exceed the predetermined threshold resistance value comprises at least three monitored resistance values which exceed the predetermined threshold resistance value.

6. A vapour provision system according to any of claim 1 to 5, wherein the period of time is the duration of a heating operation of the heating element.

7. A vapour provision system according to any of claim 1 to 5, wherein the period of time is the duration of a predetermined consecutive number of heating operations of the heating element.

8. A vapour provision system according to claim 7, wherein the predetermined consecutive number of heating operations of the heating element is ten consecutive heating operations of the heating element.

9. A vapour provision system according to any of claim 1 to 5, wherein the period of time comprises at least one of 10 seconds, 30 seconds, 60 seconds, or 120 seconds.

10. A vapour provision system according to any of claim 1 to 9, wherein the control circuitry is configured, for each monitored resistance value, to detect a fault condition if the determined monitored resistance value, and at least one preceding determined monitored resistance value occurring within the period of time before the given determined monitored resistance value was determined, exceeds the predetermined threshold resistance value.

1 1 . A vapour provision system according to any of claim 1 to 10, wherein the control circuitry is further configured to determine a baseline resistance value for the heating element by making a measurement of a first resistance value for the heating element, wherein the threshold resistance value is determined based on the baseline resistance value.

12. A vapour provision system according to claim 1 1 , wherein the threshold resistance value is a predetermined multiple of the baseline resistance value.

13. A vapour provision system according to any of claim 1 to 12, wherein the system comprises an inhalation sensor, and wherein the control circuitry is configured to provide power for the heating element for a heating operation in response to a signal from the inhalation sensor which is indicative of a user inhaling on the vapour provision system .

14. A cartridge containing a heating element for use in the vapour provision system of any of claim 1 or 13.

15. A control circuitry, for use in a vapour provision system for generating a vapour from a vapour precursor material, wherein the control circuitry is operable to provide power for use in performing a heating operation in the vapour provision system , and operable to com pare a measurement of a resistance value for the heating operation with a

predetermined threshold resistance value for use in detecting a fault condition, wherein the control circuitry is further configured to:

monitor the resistance of the heating element during at least one heating operation of the heating element to determine a plurality of monitored resistance values over a period of time;

compare each of the plurality of monitored resistance values with the predetermined threshold resistance value; and

detect a fault condition for the heating element based on the comparison of the plurality of monitored resistance values with the predetermined threshold resistance value.

16. A method of operating control circuitry in a vapour provision system , the vapour provision system comprising a heating element for generating a vapour from a vapour precursor material, wherein the control circuitry is configured to provide power for the heating element for performing a heating operation to generate the vapour and to compare a measurement of a resistance value for the heating element for a heating operation with a predetermined threshold resistance value for the heating element for use in detecting a fault condition during the heating operation; wherein the method comprises the control circuitry: monitoring the resistance of the heating element during at least one heating operation of the heating element to determine a plurality of monitored resistance values over a period of time;

comparing each of the plurality of monitored resistance values with the

predetermined threshold resistance value; and

detecting a fault condition for the heating element based on the comparison of the plurality of monitored resistance values with the predetermined threshold resistance value.