Aerosol generating device

1. An aerosol generating device comprising:

an accommodation portion configured to accommodate an aerosol generating article;

a heater configured to heat the aerosol generating article inserted in the accommodation portion;

a temperature sensor configured to measure a temperature of the heater; and

a controller configured to:

acquire temperature data of the heater based on the temperature of the heater measured by the temperature sensor; and

generate a reuse detection signal based on a change in the temperature data which is caused by insertion of the aerosol generating article into the accommodation portion, wherein the reuse detection signal indicates the aerosol generating article was preheated before being inserted in the accommodation portion.

2. The aerosol generating device of claim 1 , wherein the controller is configured to generate the reuse detection signal based on the change in the temperature data being less than a predetermined value.

3. The aerosol generating device of claim 1 , wherein the change in the temperature data indicates a rate of change in a temperature gradient of the heater.

4. The aerosol generating device of claim 3 , wherein the controller is configured to generate the reuse detection signal based on the rate of change in the temperature gradient of the heater being less than 150%.

5. The aerosol generating device of claim 1 , wherein the change in the temperature data indicates a difference between a temperature of the heater measured at a specific point in time before the aerosol generating article is inserted and a temperature of the heater measured at a specific point in time after the aerosol generating article is inserted.

6. The aerosol generating device of claim 5 , wherein the controller generates the reuse detection signal based on the difference being less than a predetermined reference value in a range of 1° C. to 3° C.

7. The aerosol generating device of claim 1 , wherein the change in the temperature data indicates a difference between an average temperature of the heater during a predetermined period before the aerosol generating article is inserted and an average temperature of the heater during a predetermined period after the aerosol generating article is inserted.

8. The aerosol generating device of claim 1 , wherein the temperature of the heater is maintained constant for a predetermined time period after the aerosol generating article is discharged.

9. The aerosol generating device of claim 8 , wherein the temperature of the heater is maintained at a constant temperature in a range of 120° C. to 160° C. after the aerosol generating article is discharged.

10. The aerosol generating device of claim 8 , wherein the heater is maintained constant for 20 to 40 seconds after the aerosol generating article is discharged.

11. The aerosol generating device of claim 1 , further comprising:

an aerosol generating article detection sensor configured to detect insertion and discharge of the aerosol generating article.

12. The aerosol generating device of claim 11 , wherein the aerosol generating article detection sensor includes at least one of a pressure sensor, an optical sensor, an infrared sensor, an inductive sensor, a capacitance sensor, a resistance sensor, and a geomagnetic sensor.

13. The aerosol generating device of claim 1 , wherein the controller is configured to stop operation of the aerosol generating device when the reuse detection signal is generated.

14. The aerosol generating device of claim 1 , wherein the controller generates a notification signal for notifying a user of reuse of the aerosol generating article when the reuse detection signal is generated.

15. The aerosol generating device of claim 14 , further comprising at least one of a vibrator, a speaker, and a display, which is configured to output a notification corresponding to the notification signal.