Aerosol generator

Abstract

An aerosol generating device is disclosed. The aerosol generating device may include a chamber for storing liquid, a heater for heating the liquid, a resistance detection sensor for outputting a signal corresponding to a resistance value of the heater, and a control unit for calculating a temperature of the heater based on the resistance value of the heater. The control unit may determine whether a temperature of the heater exceeds a first temperature in response to a supply of a predetermined sensing power to the heater in a first preheating section, and if the temperature of the heater is equal to or lower than the first temperature, control the heater to be supplied with a first amount of power in a heating section after the first preheating section, and if the temperature of the heater exceeds the first temperature, control the heater to be supplied with a second amount of power lower than the first amount of power in the heating section, and if the temperature of the heater exceeds the first temperature, determine whether a temperature of the heater exceeds a second temperature higher than the first temperature in response to a supply of the sensing power to the heater in a second preheating section after the heating section, and if the temperature of the heater exceeds the second temperature, determine that the liquid is exhausted.