Granted Patent B2

US 12,604,925 · App. 18/175,089 · Granted Apr 21, 2026

Inventors: Jung Ho Han (Daejeon, KR); Jang Uk Lee (Seoul, KR); Hun Il Lim (Seoul, KR); Jong Sub Lee (Gyeonggi-do, KR); Dae Nam Han (Daejeon, KR); Jin Young Yoon (Seoul, KR); Young Lea Kim (Seoul, KR); Ji Soo Jang (Seoul, KR); Wang Seop Lim (Gyeonggi-do, KR); Moon Bong Lee (Seoul, KR); Soung Ho Ju (Daejeon, KR); Du Jin Park (Seoul, KR); Seong Won Yoon (Gyeonggi-do, KR)

Assignee: KT&G CORPORATION

A24D1/20A24D3/17A24F40/40A24F40/46A24F40/50A24F40/53A24F40/57A24F40/90A24F40/95H05B3/42A24D3/04A24F40/20A24F40/485H05B2203/021

Abstract

Claims (41)

1 . A heater for heating an aerosol forming material, the heater comprising:

a heating unit comprising a base portion having a tubular shape and a tip portion formed at one terminal end of the base portion;

a first sheet comprising a plurality of electro-conductive tracks respectively formed on both surfaces surrounding at least a portion of an outer circumferential surface of the base portion;

a second sheet surrounding at least a portion of the first sheet and having hardness; and

a coating layer configured to planarize a stepped surface formed by a stacked structure comprising the heating unit, the first sheet, and the second sheet.

2 . The heater of claim 1 ,

wherein the coating layer comprises a heat resistant composition.

3 . The heater of claim 1 ,

wherein the coating layer comprises at least one coating layer from among a glass coating layer, a Teflon coating layer, and a molar coating layer.

4 . The heater of claim 1 ,

wherein the plurality of electro-conductive tracks comprise:

a first electro-conductive track formed on a first surface of the both surfaces of the first sheet and having a resistance temperature coefficient characteristic used for detecting a temperature of the heating unit; and

a second electro-conductive track formed on a second surface of the both surfaces of the first sheet and being configured to heat the heating unit as a current flows therein.

5 . The heater of claim 4 ,

wherein, from between two surfaces of the first sheet, the first surface contacts the heating unit and the second surface does not contact the heating unit.

6 . The heater of claim 4 ,

wherein, from between two surfaces of the first sheet, the second surface contacts the heating unit and the first surface does not contact the heating unit.

7 . An aerosol generating device comprising:

a casing configured to accommodate a cigarette in an empty space formed at a terminal end of the casing;

a heater located inside the empty space and configured to heat the interior of an accommodated cigarette through a needle-type structure;

a controller; and

a battery configured to supply power needed for operations of the heater and the controller,

wherein the heater comprises:

a heating unit comprising a base portion having a cylindrical shape and a tip portion formed at one terminal end of the base portion;

a first sheet comprising an electro-conductive track formed on one surface and surrounding at least a portion of an outer circumferential surface of the base portion; and

a coating layer covering the heating unit and the first sheet,

the first sheet constitutes a stepped surface formed by a stacked structure surrounding at least a portion of the outer circumferential surface of the base portion, and

the coating layer planarizes the stepped surface formed by the stacked structure.

8 . The aerosol generating device of claim 7 ,

wherein the electro-conductive track is configured to receive power from a battery through a connecter comprising a pair of wires and heat the heating unit.

9 . The aerosol generating device of claim 7 ,

wherein the electro-conductive track has a resistance temperature coefficient characteristic used to detect a temperature of the heating unit, and

the controller determines a resistance of the electro-conductive track through a connector comprising a pair of wires and determines a temperature of the heating unit based on a determined resistance and the resistance temperature coefficient characteristic.

10 . The aerosol generating device of claim 7 ,

wherein the controller adjusts the temperature of the heating unit by adjusting a magnitude or a period of a pulse voltage supplied from the battery to the heater.

11 . The aerosol generating device of claim 7 ,

wherein at least one of the heating unit and the first sheet comprises a thermo-conductive material including ceramic.

12 . The aerosol generating device of claim 7 ,

wherein the electro-conductive track comprises at least one of tungsten, gold, platinum, silver, copper, nickel, and palladium.

13 . The aerosol generating device of claim 7 ,

further comprising a second sheet, which surrounds at least a portion of the first sheet and has rigidity.

Priority Claims (11)

Continuity (2)

References Cited (400)