Aerosol generating device comprising a cartridge

An aerosol generating device comprising:

• a cartridge comprising a storage for storing an aerosol generating material, and a first airflow passage through which airflow moves along a path surrounding the storage;
• an atomizer configured to atomize the aerosol generating material with ultrasonic vibration;
• and
• a main body including a coupling portion to which the cartridge is detachably coupled,
• wherein a gap is formed between the main body and the cartridge such that external air flows into the aerosol generating device through the gap,
• the first airflow passage comprises an inlet portion through which the external air that has flown into the aerosol generating device flows into the cartridge and a bypass portion connects the inlet portion to the atomizer, and
• wherein the bypass portion comprises a first portion extending along an outer wall of the storage in a longitudinal direction of the cartridge, a second portion extending in a direction crossing the longitudinal direction of the cartridge, and a third portion extending in the longitudinal direction of the cartridge;
• wherein the cartridge further comprises a hollow portion for preventing aerosol generating material from leaking from the storage and flowing into the first airflow passage and configured to seal gaps around a liquid supply port, the hollow portion includes
• a first hole located inside a housing, and connected to the first airflow passage such that external air flowing in the first airflow passage moves to the atomizer through the first hole, and
• a second hole, located inside the housing, and connected to the first airflow passage such that aerosol generated by the atomizer moves from the atomizer through the second hole.