Heater for aerosol generating device and aerosol generating device including the same

Patent metadata

Field	Value
Publication number	US-12543789-B2
Application number	US-202217766929-A
Country	US
Kind code	B2
Filing date	Jan 13, 2022
Priority date	Jan 14, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Provided is a heater for an aerosol-generating device including a first electrically conductive pattern configured to perform heating and a second electrically conductive pattern arranged in parallel with the first electrically conductive pattern. The first electrically conductive pattern and/or the second electrically conductive pattern may include a material having a relatively small resistance temperature coefficient. Accordingly, a temperature increase rate of the heater may be greatly improved.

First claim

The invention claimed is:

1 . A heater comprising:
a first electrically conductive pattern configured to perform heating; and a second electrically conductive pattern disposed in parallel with the first electrically conductive pattern, wherein the first electrically conductive pattern includes a material having a temperature coefficient of resistance that is less than or equal to 1,000 ppm/° C. wherein the second electrically conductive pattern is disposed outside of the first electrically conductive pattern, and wherein a resistance of the second electrically conductive pattern is less than or equal to a resistance of the first electrically conductive pattern.

2 . The heater of claim 1 , wherein the first electrically conductive pattern includes at least one of constantan, manganin, and nickel silver.

3 . The heater of claim 1 , wherein the first electrically conductive pattern includes a material having a resistivity that is greater than or equal to 3.0×10 −8 Ωm.

4 . The heater of claim 1 ,
wherein the heater further includes a third electrically conductive pattern disposed outside of the second electrically conductive pattern, and wherein a distance between the third electrically conductive pattern and the second electrically conductive pattern is wider than a distance between the second electrically conductive pattern and the first electrically conductive pattern.

5 . The heater of claim 1 ,
wherein the second electrically conductive pattern includes a material having a resistivity less than a resistivity of the first electrically conductive pattern.

6 . The heater of claim 1 ,
wherein a thickness of the second electrically conductive pattern is greater than a thickness of the first electrically conductive pattern.

7 . The heater of claim 6 , wherein the thickness of the second electrically conductive pattern is less than or equal to 30 μm.

8 . The heater of claim 1 , wherein the second electrically conductive pattern is configured to measure temperature of the heater, and includes a material having a temperature coefficient of resistance greater than a temperature coefficient of resistance of the first electrically conductive pattern.

9 . The heater of claim 8 , wherein the second electrically conductive pattern is disposed to measure the temperature of the central region of the heating surface of the heater, and
wherein a distance from a center of the heating surface to a periphery of the central region is 0.15 to 0.5 times a distance from the center of the heating surface to a periphery of the heating surface.

10 . An aerosol generating device comprising:
a housing forming an accommodating space in which an aerosol-generating article is accommodated; and a heater configured to heat the aerosol-generating article accommodated in the accommodating space, wherein the heater comprises:
a first electrically conductive pattern including a material having a temperature coefficient of resistance less than or equal to 1,000 ppm/° C.; and
a second electrically conductive pattern disposed in parallel with the first electrically conductive pattern,
wherein the second electrically conductive pattern is disposed outside of the first electrically conductive pattern, and wherein a resistance of the second electrically conductive pattern is less than or equal to a resistance of the first electrically conductive pattern.

11 . The aerosol generating device of claim 10 , further comprising:
a controller configured to control the heater, wherein the controller is further configured to independently control the first electrically conductive pattern and the second electrically conductive pattern.

Assignees

• Kt & G Corp

Inventors

• Jeong Jong Seong
• Go Gyoung Min
• Bae Hyung Jin
• Seo Jang Won
• Jang Chul Ho
• Jeong Min Seok
• Jung Jin Chul

Classifications

• H05B3/20

  Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater (H05B3/62, H05B3/68, H05B3/78, H05B3/84 take precedence) · CPC title

• H05B3/10

  Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor · CPC title

• H05B2203/013

  Heaters using resistive films or coatings · CPC title

• H05B2203/005

  using multiple resistive elements or resistive zones isolated from each other · CPC title

• H05B3/26 Primary

  heating conductor mounted on insulating base {(for transparent areas H05B3/84, H05B3/86)} · CPC title