Control for an induction-based aerosol delivery device

Patent metadata

Field	Value
Publication number	US-10104912-B2
Application number	US-201615002056-A
Country	US
Kind code	B2
Filing date	Jan 20, 2016
Priority date	Jan 20, 2016
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An aerosol delivery device is provided that includes a substrate configured to carry an aerosol precursor composition, and includes an induction transmitter, induction receiver and control component. The induction transmitter is configured to generate an oscillating magnetic field. The induction receiver is positioned in proximity to the substrate, and configured to generate heat when exposed to the oscillating magnetic field and thereby vaporize components of the aerosol precursor composition. The control component is configured to direct current to the induction transmitter to drive the induction transmitter to generate the oscillating magnetic field, with the control component being configured to direct the current according to a zero voltage switching (ZVS) inverter topology.

First claim

What is claimed is:

1. An aerosol delivery device comprising:
a substrate or liquid transport element configured to provide an aerosol precursor composition;
an induction transmitter configured to generate an oscillating magnetic field;
an induction receiver configured to generate heat when exposed to the oscillating magnetic field and thereby vaporize components of the aerosol precursor composition provided by the substrate or liquid transport element; and
a control component configured to direct current to the induction transmitter to drive the induction transmitter to generate the oscillating magnetic field, the control component being configured to direct the current according to a zero voltage switching (ZVS) inverter topology,
wherein the control component further includes first and second switches that are alternately switchable to effect the ZVS inverter topology,
wherein the control component and induction transmitter include respectively a capacitor and coil that form a tank circuit, and
wherein the control component being configured to direct the current includes being configured to direct the current in cycles each of which includes a positive half in which the first and second switches are alternately switchable to charge the capacitor and direct current in a positive direction through the coil, and a negative half in which the first and second switches are alternately switchable to cause the capacitor to discharge and thereby direct current in a negative direction through the coil.

2. The aerosol delivery device of claim 1 further comprising a power source including a supercapacitor,
wherein the control component being configured to direct the current to the induction transmitter includes being configured to direct the current from supercapacitor to the induction transmitter.

3. The aerosol delivery device of claim 2 , wherein the power source further includes terminals connectable with a source of energy from which the supercapacitor is chargeable.

4. The aerosol delivery device of claim 3 , wherein the power source further comprises the source of energy, and the source of energy is or includes a solid-state battery or lithium-ion battery.

5. The aerosol delivery device of claim 1 , wherein the control component further includes high-side and low-side drivers for respectively the first and second switches.

6. The aerosol delivery device of claim 1 further comprising a Hall effect current sensor positioned proximate the induction receiver and configured to produce a measurement of current through the induction receiver, the control component being configured to receive the measurement and control operation of at least one functional element of the aerosol delivery device in response thereto.

7. The aerosol delivery device of claim 1 , wherein the induction transmitter is configured to at least partially surround the induction receiver.

8. The aerosol delivery device of claim 7 , wherein the induction transmitter defines a tubular or coiled configuration.

9. A control body coupled or coupleable with a cartridge that is equipped with an induction receiver and contains an aerosol precursor composition, the control body being coupled or coupleable with the cartridge to form an aerosol delivery device in which the induction receiver is configured to generate heat when exposed to an oscillating magnetic field and thereby vaporize components of the aerosol precursor composition, the control body comprising:
an induction transmitter configured to generate the oscillating magnetic field; and
a control component configured to direct current to the induction transmitter to drive the induction transmitter to generate the oscillating magnetic field, the control component being configured to direct the current according to a zero voltage switching (ZVS) inverter topology,
wherein the control component further includes first and second switches that are alternately switchable to effect the ZVS inverter topology,
wherein the control component and induction transmitter include respectively a capacitor and coil that form a tank circuit, and
wherein the control component being configured to direct the current includes being configured to direct the current in cycles each of which includes a positive half in which the first and second switches are alternately switchable to charge the capacitor and direct current in a positive direction through the coil, and a negative half in which the first and second switches are alternately switchable to cause the capacitor to discharge and thereby direct current in a negative direction through the coil.

10. The control body of claim 9 further comprising a power source including a supercapacitor,
wherein the control component being configured to direct the current to the induction transmitter includes being configured to direct the current from supercapacitor to the induction transmitter.

11. The control body of claim 10 , wherein the power source further includes terminals connectable with a source of energy from which the supercapacitor is chargeable.

12. The control body of claim 11 , wherein the power source further comprises the source of energy, and the source of energy is or includes a solid-state battery or lithium-ion battery.

13. The control body of claim 9 , wherein the control component further includes high-side and low-side drivers for respectively the first and second switches.

14. The control body of claim 9 , wherein the control component is further configured to receive a measurement of current through the induction receiver, the control component being configured to receive the measurement from a Hall effect current sensor positioned proximate the induction receiver, and control operation of at least one functional element of the aerosol delivery device in response to the measurement.

15. The control body of claim 9 , wherein the induction transmitter is configured to at least partially surround the induction receiver when the control body is coupled with the cartridge.

16. The control body of claim 15 , wherein the induction transmitter defines a tubular or coiled configuration.

Assignees

• Reynolds Tobacco Co R
• Rai Strategic Holdings Inc

Inventors

• Sur Rajesh

Classifications

• H05B6/108 Primary

  for heating a fluid · CPC title

• A61M2205/8293

  Solar · CPC title

• A61M2205/8262

  connectable to external power source, e.g. connecting to automobile battery through the cigarette lighter · CPC title

• A61M2205/8256

  being integrated in the case or housing of the apparatus · CPC title

• A61M2205/8206

  battery-operated · CPC title