Photodetector for measuring aerosol precursor composition in an aerosol delivery device

• US 10,477,896 B2
• Filed: 10/12/2016
• Issued: 11/19/2019
• Est. Priority Date: 10/12/2016
• Status: Active Grant

• Current Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Original Assignee: RAI STRATEGIC HOLDINGS, INC. (British American Tobacco PLC)
• Inventors: Sur, Rajesh, Hunt, Eric T., Sears, Stephen B.
• Primary Examiner(s): Paik, Sang Y
• Application Number:
  US15/291,771
• Publication Number:
  US 20180098574A1
• Time in Patent Office: 1,133 Days
• Field of Search: 392386-406, 392449-464
• CPC Class Codes: A24F 40/10 Devices using liquid inhalable precursors
• CPC Class Codes: A24F 40/51 Arrangement of sensors
• CPC Class Codes: A24F 40/53 Monitoring, e.g. fault detection
• CPC Class Codes: F22B 1/284 with water in reservoirs
• CPC Class Codes: G01F 23/292 Light , e.g. infrared or ultraviolet
• CPC Class Codes: H05B 1/02 Automatic switching arrangements specially adapted to apparatus ; Control of heating devices thermally-actuated switches H01H37/00

Abstract

An aerosol delivery device is provided that includes at least one housing enclosing a reservoir configured to retain an aerosol precursor composition, and a heating element controllable to activate and vaporize components of the aerosol precursor composition. The aerosol delivery device includes a light source configured to emit light into the reservoir, and a photodetector configured to detect a reflection of the light, and that indicates an amount of aerosol precursor composition retained in the reservoir. And the aerosol delivery device includes a control component coupled to the photodetector and configured to control operation of at least one functional element of the aerosol delivery device based on the reflection, and thereby the amount of aerosol precursor composition.

Claims

1. An aerosol delivery device comprising:

at least one housing enclosing a reservoir configured to retain an aerosol precursor composition;

a heating element controllable to activate and vaporize components of the aerosol precursor composition;

a light source configured to emit light into the reservoir;

a photodetector configured to detect a reflection of the light, wherein the reflection of the light indicates an amount of aerosol precursor composition retained in the reservoir;

a flow sensor configured to detect a flow of air through at least a portion of the at least one housing; and

a control component coupled to the photodetector and configured to control operation of at least one functional element of the aerosol delivery device based on the reflection so detected, and thereby the amount of aerosol precursor composition,

wherein the control component is configured to operate in an active mode to control the heating element to activate and vaporize components of the aerosol precursor composition only when both the flow of air is detected by the flow sensor, and the reflection of the light indicates at least a threshold amount of the aerosol precursor composition.

2. The aerosol delivery device of claim 1, wherein the reflection of the light indicates the presence or absence of at least a threshold amount of aerosol precursor composition, and

wherein the control component being configured to control operation of the at least one functional element includes being configured to control operation of the at least one functional element based on the reflection so detected, and thereby the presence or absence of at least the threshold amount of aerosol precursor composition.

3. The aerosol delivery device of claim 1, wherein the photodetector is a color sensor including a color pass filter and a photodetector for each of a plurality of colors, and the reflection of the light includes a component for each of the plurality of colors.

4. The aerosol delivery device of claim 1, wherein the control component being configured to control operation of the at least one functional element includes being configured to control at the least one functional element to alter a locked state of the aerosol delivery device.

5. The aerosol delivery device of claim 1, wherein the control component being configured to control operation of the at least one functional element includes being configured to control an indicator to provide a user-perceptible feedback that indicates the amount of aerosol precursor composition.

6. The aerosol delivery device of claim 1, wherein the reflection of the light that indicates the amount of aerosol precursor composition also indicates an absorption characteristic of the aerosol precursor composition, and

wherein the control component is further configured to perform an authentication of the aerosol precursor composition based on a comparison of the absorption characteristic and a known absorption characteristic, and control operation of the at least one functional element further based on the authentication.

7. The aerosol delivery device of claim 6, wherein the control component being configured to control operation of the at least one functional element further based on the authentication includes being configured to control at the least one functional element to alter a locked state of the aerosol delivery device.

8. The aerosol delivery device of claim 1, wherein the reflection of the light that indicates the amount of aerosol precursor composition also indicates an absorption characteristic of the aerosol precursor composition, and

wherein the control component is further configured to date the aerosol precursor composition based on a comparison of the absorption characteristic and a known absorption characteristic range, and control operation of the at least one functional element further based on the date of the aerosol precursor composition.

9. The aerosol delivery device of claim 8, wherein the control component being configured to control operation of the at least one functional element includes being configured to control an indicator to provide a user-perceptible feedback that indicates the date of the aerosol precursor composition.

10. The aerosol delivery device of claim 1, wherein the aerosol precursor composition comprises glycerin and nicotine.

11. A cartridge coupled or coupleable with a control body that is equipped with a control component, the control body being coupled or coupleable with the cartridge to form an aerosol delivery device, the cartridge comprising:

at least one housing enclosing a reservoir configured to retain an aerosol precursor composition;

a heating element controllable to activate and vaporize components of the aerosol precursor composition;

a light source configured to emit light into the reservoir; and

a photodetector configured to detect a reflection of the light, wherein the reflection of the light indicates an amount of aerosol precursor composition retained in the reservoir,

wherein the control component is coupled to the photodetector when the control body is coupled with the cartridge, the control component being configured to control operation of at least one functional element of the aerosol delivery device based on the reflection so detected, and thereby the amount of aerosol precursor composition, and

wherein the control component is further configured to operate in an active mode to control the heating element to activate and vaporize components of the aerosol precursor composition only when both a flow of air is detected by a flow sensor, and the reflection of the light indicates at least a threshold amount of the aerosol precursor composition.

12. The cartridge of claim 11, wherein the reflection of the light indicates the presence or absence of at least a threshold amount of aerosol precursor composition, and

wherein the control component being configured to control operation of the at least one functional element includes being configured to control operation of the at least one functional element based on the reflection, and thereby the presence or absence of at least the threshold amount of aerosol precursor composition.

13. The cartridge of claim 11, wherein the photodetector is a color sensor including a color pass filter and a photodetector for each of a plurality of colors, and the reflection of the light includes a component for each of the plurality of colors.

14. The cartridge of claim 11, wherein the aerosol precursor composition comprises glycerin and nicotine.

15. A control body coupled or coupleable with a cartridge to form an aerosol delivery device, the cartridge including a reservoir configured to retain an aerosol precursor composition, a heating element controllable to activate and vaporize components of the aerosol precursor composition, a light source configured to emit light into the reservoir, and a photodetector configured to detect a reflection of the light, wherein the reflection of the light indicates an amount of aerosol precursor composition retained in the reservoir, the control body comprising:

a housing; and

within the housing,

a flow sensor configured to detect a flow of air through at least a portion of the housing, and

a control component coupled to the photodetector when the control body is coupled with the cartridge, the control component being configured to control operation of at least one functional element of the aerosol delivery device based on the reflection so detected, and thereby the amount of aerosol precursor composition,

wherein the control component is configured to operate in an active mode to control the heating element to activate and vaporize components of the aerosol precursor composition only when both the flow of air is detected by the flow sensor, and the reflection of the light indicates at least a threshold amount of the aerosol precursor composition.

16. The control body of claim 15, wherein the reflection of the light indicates the presence or absence of at least a threshold amount of aerosol precursor composition, and

wherein the control component being configured to control operation of the at least one functional element includes being configured to control operation of the at least one functional element based on the reflection, and thereby the presence or absence of at least the threshold amount of aerosol precursor composition.

17. The control body of claim 15, wherein the control component being configured to control operation of the at least one functional element includes being configured to control at the least one functional element to alter a locked state of the aerosol delivery device.

18. The control body of claim 15, wherein the control component being configured to control operation of the at least one functional element includes being configured to control an indicator to provide a user-perceptible feedback that indicates the amount of aerosol precursor composition.

19. The control body of claim 15, wherein the reflection of the light that indicates the amount of aerosol precursor composition also indicates an absorption characteristic of the aerosol precursor composition, and

wherein the control component is further configured to perform an authentication of the aerosol precursor composition based on a comparison of the absorption characteristic and a known absorption characteristic, and control operation of the at least one functional element further based on the authentication.

20. The control body of claim 19, wherein the control component being configured to control operation of the at least one functional element further based on the authentication includes being configured to control at the least one functional element to alter a locked state of the aerosol delivery device.

21. The control body of claim 15, wherein the reflection of the light that indicates the amount of aerosol precursor composition also indicates an absorption characteristic of the aerosol precursor composition, and

wherein the control component is further configured to date the aerosol precursor composition based on a comparison of the absorption characteristic and a known absorption characteristic range, and control operation of the at least one functional element further based on the date of the aerosol precursor composition.

22. The control body of claim 21, wherein the control component being configured to control operation of the at least one functional element includes being configured to control an indicator to provide a user-perceptible feedback that indicates the date of the aerosol precursor composition.

23. An aerosol delivery device comprising:

at least one housing enclosing a reservoir configured to retain an aerosol precursor composition;

an atomizer controllable to activate and to produce an aerosol from the aerosol precursor composition;

a light source configured to emit light into the reservoir;

a photodetector configured to detect a reflection of the light, wherein the reflection of the light indicates an amount of aerosol precursor composition retained in the reservoir;

a flow sensor configured to detect a flow of air through at least a portion of the at least one housing; and

a control component coupled to the photodetector and configured to control operation of at least one functional element of the aerosol delivery device based on the reflection so detected, and thereby the amount of aerosol precursor composition,

wherein the control component is configured to operate in an active mode to control the atomizer to activate and to produce an aerosol from the aerosol precursor composition only when both the flow of air is detected by the flow sensor, and the reflection of the light indicates at least a threshold amount of the aerosol precursor composition.

24. The aerosol delivery device of claim 23, wherein the reflection of the light indicates the presence or absence of at least a threshold amount of aerosol precursor composition, and

wherein the control component being configured to control operation of the at least one functional element includes being configured to control operation of the at least one functional element based on the reflection so detected, and thereby the presence or absence of at least the threshold amount of aerosol precursor composition.

25. The aerosol delivery device of claim 23, wherein the photodetector is a color sensor including a color pass filter and a photodetector for each of a plurality of colors, and the reflection of the light includes a component for each of the plurality of colors.

26. The aerosol delivery device of claim 23, wherein the atomizer comprises a heating element.