US 12,232,537 B2
Aerosol generating device
Byung Sung Cho, Gyeonggi-do (KR); Won Kyeong Lee, Gyeonggi-do (KR); Min Kyu Kim, Daejeon (KR); and Jong Sub Lee, Gyeonggi-do (KR)
Assigned to KT&G CORPORATION, Daejeon (KR)
Appl. No. 17/293,242
Filed by KT&G CORPORATION, Daejeon (KR)
PCT Filed Dec. 14, 2020, PCT No. PCT/KR2020/018258
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2021/145570, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 10-2020-0006165 (KR), filed on Jan. 16, 2020.
Prior Publication US 2022/0361580 A1, Nov. 17, 2022
Int. Cl. A24F 40/50 (2020.01); A24F 40/10 (2020.01); A24F 40/40 (2020.01)
CPC A24F 40/50 (2020.01) [A24F 40/10 (2020.01); A24F 40/40 (2020.01)] 8 Claims
OG exemplary drawing
 
1. An aerosol generating device comprising:
a battery configured to supply power for generating an aerosol from an aerosol generating material;
a converter configured to convert a supply voltage from the battery into a constant voltage of a predetermined level;
a heater configured to heat the aerosol generating material using the supply voltage;
a switching circuit configured to perform a switching so that one of the constant voltage and the supply voltage is selectively supplied to the heater;
a detection circuit configured to detect a change in resistance of the heater by applying the constant voltage output from the converter and performing a current sensing on the heater with a resistance value; and
a controller configured to control the heater for generating the aerosol by controlling the switching circuit to selectively perform one of a monitoring mode for performing the detection of the change in the resistance of the heater using the constant voltage and a heating mode for heating the heater using the supply voltage,
wherein based on a change in a temperature of the heater corresponding to the change in the resistance of the heater detected by applying the constant voltage in a current monitoring mode, the controller is further configured to determine a duty ratio or a duty cycle for a pulse width modulation (PWM) control on the power to be supplied to the heater for a subsequent heating mode so that the aerosol generating material is heated to a target temperature range in the subsequent heating mode.