US 12,075,811 B2
Heater management
Stephane Bilat, Areuse (CH)
Assigned to Philip Morris Products S.A., Neuchatel (CH)
Filed by Philip Morris Products S.A., Neuchatel (CH)
Filed on Jan. 12, 2021, as Appl. No. 17/146,648.
Application 17/146,648 is a continuation of application No. 15/560,192, granted, now 10,925,315, previously published as PCT/EP2016/056175, filed on Mar. 21, 2016.
Claims priority of application No. 15161202 (EP), filed on Mar. 26, 2015.
Prior Publication US 2021/0212170 A1, Jul. 8, 2021
Int. Cl. A24B 15/167 (2020.01); A24F 40/40 (2020.01); A24F 40/53 (2020.01); H05B 1/02 (2006.01); A24F 40/10 (2020.01)
CPC A24B 15/167 (2016.11) [A24F 40/40 (2020.01); A24F 40/53 (2020.01); H05B 1/0297 (2013.01); A24F 40/10 (2020.01)] 13 Claims
OG exemplary drawing
 
1. An electrically operated aerosol-generating system, comprising:
an electric heater comprising at least one heating element configured to heat an aerosol-forming substrate;
a power supply; and
electric circuitry for an electrically operated aerosol-generating device, in use the electric circuitry being connected to the electric heater configured to heat the aerosol-forming substrate and to the power supply, the electric circuitry comprising a memory, and being configured to:
measure an initial resistance, or an initial rate of change of resistance, of the electric heater within a predetermined time period after power is supplied to the electric heater,
compare the initial resistance or the initial rate of change of resistance of the electric heater with a range of acceptable values,
if the initial resistance or the initial rate of change of resistance is outside the range of acceptable values, prevent the supply of power to the electric heater, or provide an indication, until the electric heater or the aerosol-forming substrate is replaced, and
measure the initial resistance, or the initial rate of change of resistance as a separate routine to supplying power to the electric heater to heat the aerosol-forming substrate, using lower power.