Aerosol generating system with improved aerosol production

Patent metadata

Field	Value
Publication number	US-9949507-B2
Application number	US-201214354349-A
Country	US
Kind code	B2
Filing date	Oct 25, 2012
Priority date	Oct 27, 2011
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

There is provided a method of controlling aerosol production in an aerosol-generating device, the device including an aerosol-forming substrate, a heater including at least one heating element for heating the aerosol-forming substrate, and a power source for providing power to the heating element, the method including determining the temperature of the heating element; and adjusting the power to the heating element to maintain the temperature of the heating element within a desired temperature range, wherein the desired temperature range is dynamically calculated based on a measured flow rate of gas through or past the device. By controlling the temperature of the heating element, an aerosol with consistent and desirable properties can be produced.

First claim

The invention claimed is:

1. A method of controlling aerosol production in an electrically heated device, the device comprising:
a heater comprising at least one heating element; and
a power source for providing power to the at least one heating element,
the method comprising the steps of:
determining a temperature of the at least one heating element; and
adjusting the power to the at least one heating element to maintain the temperature of the at least one heating element within a desired temperature range,
wherein the desired temperature range is dynamically calculated based on a measured flow rate of gas through or past the device.

2. The method according to claim 1 , wherein the desired temperature range is dependent on a composition of an aerosol-forming substrate received in the device.

3. The method according to claim 1 , further comprising providing an initial power to the at least one heating element, wherein the step of adjusting the power to the t least one heating element is performed only when the heating element has reached a specific temperature within the desired temperature range.

4. The method according to claim 1 , wherein the step of adjusting the power is performed only after specific time has elapsed following detection of a flow of gas through the device exceeding a predetermined threshold flow rate.

5. The method according to claim 1 , further comprising the step of cutting or reducing power to the heating element based on a calculated parameter related to flow rate following the step of adjusting.

6. The method according to claim 1 wherein the step of adjusting the power to the heating element comprises adjusting a frequency or a pulse width modulation of a pulsed power signal.

7. The method according to claim 1 , wherein the desired temperature range consists of a single desired temperature.

Assignees

• Philip Morris Products Sa

Inventors

• Flick Jean-Marc

Classifications

• H05B1/0202

  Switches · CPC title

• A24F47/008 Primary

  Human Necessities · mapped topic

• A61M2205/8206

  battery-operated · CPC title

• A61M15/06

  Inhaling appliances shaped like cigars, cigarettes or pipes · CPC title

• A24F40/57 Primary

  Temperature control · CPC title