US 12,458,072 B2
Heater control in aerosol generating device
Aidan O'Hare, Coventry (GB); and Stephen Rooney, Wrexham (GB)
Assigned to JT International SA, (CH)
Appl. No. 17/778,157
Filed by JT International SA, Geneva (CH)
PCT Filed Nov. 19, 2020, PCT No. PCT/EP2020/082689
§ 371(c)(1), (2) Date May 19, 2022,
PCT Pub. No. WO2021/099467, PCT Pub. Date May 27, 2021.
Claims priority of application No. 19210446 (EP), filed on Nov. 20, 2019.
Prior Publication US 2023/0042987 A1, Feb. 9, 2023
Int. Cl. A24F 40/57 (2020.01); A24F 40/10 (2020.01); A24F 40/50 (2020.01); G05B 11/28 (2006.01)
CPC A24F 40/57 (2020.01) [A24F 40/10 (2020.01); A24F 40/50 (2020.01); G05B 11/28 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A control device of an aerosol generating device, the control device comprising a main control unit, and connectable to a battery and a heater coil, the main control unit configured to carry out one or more execution loops, a first execution loop of the one or more execution loops comprising:
applying a first power output to the heater coil for a first number of steps of the first execution loop;
disabling the first power output and thereby switching off the heater coil in a second number of steps, following the first number of steps, of the first execution loop;
measuring a first heater coil voltage of the heater coil in a third number of steps, following the second number of steps, of the first execution loop with a smaller power output than the first power output applied to the heater coil;
pausing with the heater coil switched off for a fourth number of steps, following the third number of steps, of the first execution loop; and
measuring a first off-load battery voltage of the battery in a fifth number of steps, following the fourth number of steps, of the first execution loop, wherein the first off-load battery voltage corresponds to the battery being in an off-load state in which a heating load is not being applied;
wherein each step in the first number of steps, the second number of steps, the third number of steps, the fourth number of steps, and the fifth number of steps corresponds to a predetermined time period; and
wherein the main control unit is further configured to calculate an updated power output based upon the first heater coil voltage and the first off-load battery voltage.