US 12,239,169 B2
Aerosol generating device
Won Kyeong Lee, Gyeonggi-do (KR); Min Kyu Kim, Daejeon (KR); Jong Sub Lee, Gyeonggi-do (KR); and Byung Sung Cho, Gyeonggi-do (KR)
Assigned to KT&G CORPORATION, Daejeon (KR)
Appl. No. 17/293,269
Filed by KT&G CORPORATION, Daejeon (KR)
PCT Filed Dec. 14, 2020, PCT No. PCT/KR2020/018254
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2021/157846, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 10-2020-0015165 (KR), filed on Feb. 7, 2020.
Prior Publication US 2022/0395028 A1, Dec. 15, 2022
Int. Cl. A24F 40/57 (2020.01); A24F 40/10 (2020.01); A24F 40/51 (2020.01); G05B 11/28 (2006.01); G05D 23/20 (2006.01); H05B 1/02 (2006.01)
CPC A24F 40/57 (2020.01) [A24F 40/10 (2020.01); A24F 40/51 (2020.01); G05B 11/28 (2013.01); G05D 23/20 (2013.01); H05B 1/0244 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An aerosol generating device comprising:
a cartridge including a liquid storage configured to store a liquid aerosol generating material, and an atomizer configured to generate an aerosol by heating the liquid aerosol generating material; and
a main body detachably coupled to the cartridge, and including:
a battery configured to supply power to the atomizer;
a puff sensor configured to detect a start time and an end time of a puff of a user; and
a controller configured to:
perform a pulse width modulation (PWM) control at a first duty ratio between a start time and an end time of a current puff such that a heater of the atomizer is heated to a target temperature range for generating the aerosol, and
perform the PWM control at a second duty ratio lower than the first duty ratio between the end time of the current puff and a start time of a next puff,
wherein a first period for the PWM control at the first duty ratio is longer than a second period for the PWM control at the second duty ratio.