Aerosol generating device having heater
Provided is an aerosol generating apparatus including: a heater configured to generate aerosol by heating a cigarette, the heater including a first electrically conductive heating element formed along a first path on an electrically insulating substrate, a second electrically conductive heating element formed along a second path on the electrically insulating substrate, and a temperature sensor track formed along a third path in a region between the first path and the second path; a battery configured to supply power to the heater; and a controller configured to control the power supplied from the battery to the heater and monitor a temperature sensed using the temperature sensor track.
1. An aerosol generating apparatus comprising:
a heater configured to generate aerosol by heating a cigarette, and comprising:
a first electrically conductive heating element formed along a first path on an electrically insulating substrate;
a second electrically conductive heating element formed along a second path on the electrically insulating substrate; and
a temperature sensor track formed along a third path in a region between the first path and the second path, and having electrical resistance that varies according to a temperature of the temperature sensor track;
a battery configured to supply power to the heater; and
a controller configured to control the power supplied from the battery to the heater and monitor the temperature of the temperature sensor track.
2. The aerosol generating apparatus of claim 1 , wherein
the first path is formed at an outer side of the third path on the electrically insulating substrate, and
the second path is formed at an inner side of the third path on the electrically insulating substrate.
3. The aerosol generating apparatus of claim 1 , wherein
the first electrically conductive heating element and the second electrically conductive heating element are heated by supply of the power.
4. The aerosol generating apparatus of claim 1 , wherein the heater comprises:
a heating area in which the first electrically conductive heating element, the second electrically conductive heating element, and the temperature sensor track are formed; and
a non-heating area in which ends of the first electrically conductive heating element, the second electrically conductive heating element, and the temperature sensor track are to be electrically connected to the battery.
5. The aerosol generating apparatus of claim 4 , wherein
the first electrically conductive heating element comprises a first end and a second end which are on the first path in the heating area,
the second electrically conductive heating element comprises a third end and a fourth end which are on the second path in the heating area,
the temperature sensor track comprises a fifth end and a sixth end which are on the third path in the heating area,
the fifth end is located between the first end and the third end in the heating area, and
the sixth end is located between the second end and the fourth end in the heating area.
6. The aerosol generating apparatus of claim 5 , wherein the non-heating area comprises:
a first connection portion connecting the first end and the third end to the battery;
a second connection portion connecting the second end and the fourth end to the battery; and
a pair of via holes respectively formed in the fifth end and the sixth end.
7. The aerosol generating apparatus of claim 6 , wherein the first connection portion and the second connection portion
are manufactured as an electrically conductive element identical to the first electrically conductive heating element and the second electrically conductive heating element, and
are manufactured to have a greater width or thickness than the first electrically conductive heating element and the second electrically conductive heating element.
8. The aerosol generating apparatus of claim 1 , wherein the temperature sensor track comprises an electrically conductive element having a different thermal coefficient resistance (TCR) or a different resistance value from the first electrically conductive heating element and the second electrically conductive heating element.
9. The aerosol generating apparatus of claim 8 , wherein
the first electrically conductive heating element and the second electrically conductive heating element have a TCR value between 1200 ppm/° C. and 1800 ppm/° C., and
the temperature sensor track has a TCR value between 3500 ppm/° C. and 4100 ppm/° C.
10. The aerosol generating apparatus of claim 8 , wherein
the first electrically conductive heating element and the second electrically conductive heating element have a resistance value between 0.7Ω and 0.85Ω at a room temperature of 25° C., and
the temperature sensor track has a resistance value between 12Ω and 14Ω at the room temperature of 25° C.
11. The aerosol generating apparatus of claim 1 , wherein a distance between the temperature sensor track and the first electrically conductive heating element and a distance between the temperature sensor track and the second electrically conductive heating element are each at least 0.5 mm.
12. The aerosol generating apparatus of claim 1 , wherein the heater is implemented as an internal heater to be inserted into the cigarette to heat the cigarette or as an external heater to heat an outer portion of the cigarette.
13. A heater for an aerosol generating apparatus for generating aerosol by heating a cigarette, the heater comprising:
a first electrically conductive heating element formed along a first path on an electrically insulating substrate;
a second electrically conductive heating element formed along a second path on the electrically insulating substrate; and
a temperature sensor track formed along a third path in a region between the first path and the second path, and having electrical resistance that varies according to a temperature of the temperature sensor track.