US 12,133,557 B2
Aerosol generating device
Jaemin Lee, Siheung-si (KR); Sang Kyu Park, Seoul (KR); Hyung Seok Lee, Seoul (KR); and Soung Ho Ju, Daejeon (KR)
Assigned to KT&G CORPORATION, Daejeon (KR)
Filed by KT&G CORPORATION, Daejeon (KR)
Filed on Apr. 18, 2024, as Appl. No. 18/639,389.
Application 18/639,389 is a continuation of application No. 17/780,706, previously published as PCT/KR2021/012058, filed on Sep. 6, 2021.
Claims priority of application No. 10-2020-0113745 (KR), filed on Sep. 7, 2020; and application No. 10-2021-0087858 (KR), filed on Jul. 5, 2021.
Prior Publication US 2024/0260671 A1, Aug. 8, 2024
Int. Cl. A24F 13/00 (2006.01); A24F 40/20 (2020.01); A24F 40/465 (2020.01); A24F 40/57 (2020.01); A24F 40/65 (2020.01); A24F 40/95 (2020.01); H05B 6/06 (2006.01); H05B 6/10 (2006.01)
CPC A24F 40/465 (2020.01) [A24F 40/20 (2020.01); A24F 40/57 (2020.01); A24F 40/65 (2020.01); A24F 40/95 (2020.01); H05B 6/06 (2013.01); H05B 6/108 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An aerosol-generating device having an accommodation space in which an aerosol-generating substrate is accommodated and capable of heating a susceptor by using an induction heating method, the aerosol-generating device comprising:
a battery configured to supply direct current power;
a power converter comprising a first switching unit and a second switching unit that are configured to convert the direct current power into alternating current power and perform a switching operation to operate in one of a first mode in which first power is output and a second mode in which second power different from the first power is output;
a heating unit configured to heat the susceptor, by applying an alternating magnetic field, of which a direction periodically changes, to the susceptor according to the alternating current power converted by at least one of the first switching unit and the second switching unit; and
a controller configured to control an intensity of the alternating magnetic field generated by the heating unit, by transmitting a first switching signal for operating in the first mode during a first heating time and a second switching signal for operating in the second mode during a second heating time to the first switching unit and the second switching unit,
wherein the controller is further configured to control current supplied to the heating unit and limit an upper limit of current supplied to the heating unit in some sections of the first heating time, in a state where a duty, which is a ratio of a time when a switching element included in each of the first switching unit and the second switching unit is turned on in one switching period, or a frequency of current output from the power converter is fixed so that a temperature of the susceptor reaches a preset target temperature according to the first heating time and the second heating time.