Aerosol generating article and aerosol generating system

Abstract

An aerosol generating device includes a medium rod and a filter rod aligned along a longitudinal direction of the aerosol generating device. The medium rod includes a medium portion that accommodates a medium and at least one airflow path formed through the medium portion in the longitudinal direction.

What is claimed is: 
     
         1 . An aerosol generating article comprising:
 a medium rod comprising:
 a medium portion configured to accommodate a medium; and 
 a plurality of airflow paths formed through the medium portion in a longitudinal direction of the aerosol generating article; and 
   a filter rod disposed downstream of the medium rod,   wherein the airflow paths comprise a main airflow path formed through a center of the medium portion and at least one sub-airflow path formed around the main airflow path.   
     
     
         2 . The aerosol generating article of  claim 1 , wherein the sub-airflow path has a smaller cross-sectional area than the main airflow path. 
     
     
         3 . The aerosol generating article of  claim 1 , wherein the medium rod further comprises:
 a wrapper wrapped around the medium portion of the medium rod; and   a side airflow path formed between the medium portion and the wrapper in the longitudinal direction.   
     
     
         4 . The aerosol generating article of  claim 1 , wherein a cross-section of the medium portion taken perpendicular to the longitudinal direction has one of a circular shape, an elliptical shape, a convex polygonal shape, and a concave polygonal shape. 
     
     
         5 . The aerosol generating article of  claim 1 , further comprising:
 an atomizing rod configured to accommodate an aerosol forming substrate,   wherein the atomizing rod is disposed at an upstream end of the medium rod.   
     
     
         6 . The aerosol generating article of  claim 5 , further comprising:
 a soft capsule accommodated in at least one of the medium rod, the filter rod, and the atomizing rod,   wherein the soft capsule is formed of a thermally decomposable material.   
     
     
         7 . An aerosol generating system comprising:
 an aerosol generating article comprising:
 a medium rod comprising a medium portion configured to accommodate a medium, a main airflow path formed through the medium portion in a longitudinal direction, and at least one sub-airflow path formed to be parallel with the main airflow path around the main airflow path; and 
 a filter rod; and 
   an aerosol generating device comprising a housing, an elongated cavity formed in the housing and configured to accommodate the aerosol generating article, and a heater configured to heat the aerosol generating article accommodated in the elongated cavity.   
     
     
         8 . The aerosol generating system of  claim 7 , wherein the heater comprises:
 a first heating element which is inserted into the aerosol generating article when the aerosol generating article is accommodated in the elongated cavity; and   a second heating element which is positioned outside of the aerosol generating article when the aerosol generating article is accommodated in the elongated cavity.   
     
     
         9 . The aerosol generating system of  claim 8 , wherein each of the first heating element and the second heating element is one of a direct heating type, an induction heating type, or a hot air blow heating type. 
     
     
         10 . The aerosol generating system of  claim 8 , wherein a maximum heating temperature of the first heating element is lower than a maximum heating temperature of the second heating element. 
     
     
         11 . The aerosol generating system of  claim 7 , wherein an aerosol generated by heat of the heater moves to a downstream side of the aerosol generating article through the main airflow path and the sub-airflow path. 
     
     
         12 . The aerosol generating system of  claim 7 , wherein
 the medium rod further comprises a medium sheet wrapped around an outer side surface of the medium portion, a wrapper wrapped around the medium sheet of the medium rod, and a side airflow path formed between the medium sheet and the wrapper in the longitudinal direction, and   the aerosol generated by heat of the heater moves to a downstream side of the aerosol generating article through the main airflow path, the sub-airflow path, and the side airflow path.   
     
     
         13 . The aerosol generating system of  claim 7 , wherein
 the aerosol generating article further comprises an atomizing rod configured to accommodate an aerosol forming substrate and disposed at an upstream end of the medium rod, and   the atomizing rod is configured to generate an aerosol from the aerosol forming substrate when heated by the heater of the aerosol generating device.   
     
     
         14 . The aerosol generating system of  claim 7 , wherein the heater is configured to protrude from an end of the elongated cavity. 
     
     
         15 . The aerosol generating system of  claim 14 , wherein the heater comprises:
 a heating unit configured to generate heat; and   a hot air blow unit configured to emit hot air heated by the heating unit.