Aerosol generating article and aerosol generating system including the same

Abstract

An aerosol generating article includes: a first segment impregnated with a first liquid composition; a second segment impregnated with a second liquid composition that is different from the first liquid composition; a cooler configured to cool aerosol by allowing the aerosol, generated from the first segment or the second segment, to pass through the cooler; and a filter configured to filter the aerosol by allowing the aerosol having passed through the cooler to pass through the filter, wherein at least a portion of the filter is recessed to thereby form a cavity in the filter.

What is claimed is: 
     
         1 . An aerosol generating article comprising:
 a first segment impregnated with a first liquid composition;   a second segment impregnated with a second liquid composition that is different from the first liquid composition;   a cooler configured to cool aerosol by allowing the aerosol, generated from the first segment or the second segment, to pass through the cooler; and   a filter configured to filter the aerosol by allowing the aerosol having passed through the cooler to pass through the filter,   wherein a wound paper sheet is filled in each of the first segment and the second segment, and   wherein a filling density of the sheet filled in the first segment is higher than the filling density of the sheet filled in the second segment.   
     
     
         2 . The aerosol generating article of  claim 1 , wherein each of the first liquid composition and the second liquid composition includes a tobacco extract. 
     
     
         3 . The aerosol generating article of  claim 2 , wherein the tobacco extract of the first liquid composition is nicotine salts, and
 wherein the tobacco extract of the second liquid composition is freebase nicotine.   
     
     
         4 . The aerosol generating article of  claim 1 , wherein an amount of the first liquid composition impregnated in the first segment is less than an amount of the second liquid composition impregnated in the second segment. 
     
     
         5 . The aerosol generating article of  claim 1 , wherein the filter includes a flavor material adding a flavor to the aerosol having passed through the cooler. 
     
     
         6 . The aerosol generating article of  claim 1 , wherein the filter includes:
 a first filter portion connected to the cooler and including cellulose acetate; and a second filter portion connected to the first filter portion, and   wherein at least a portion of the second filter portion is recessed in a direction toward the cooler to thereby form the cavity in the second filter portion.   
     
     
         7 . The aerosol generating article of  claim 6 , wherein the cavity extends in a longitudinal direction of the aerosol generating article, and a cross-sectional area of the cavity increases as the cavity extends in the longitudinal direction of the aerosol generating article. 
     
     
         8 . The aerosol generating article of  claim 6 , wherein the second filter portion includes a projector projecting from an inner surface of the second filter portion toward the cavity and changing circulation of the aerosol in the cavity. 
     
     
         9 . An aerosol generating system comprising:
 the aerosol generating article of  claim 1 ; and   an aerosol generating device including an accommodation space configured to accommodate the aerosol generating article and a heating element configured to heat the aerosol generating article.   
     
     
         10 . The aerosol generating system of  claim 9 , wherein the heating element is configured to surround the first segment and the second segment when the aerosol generating article is inserted into the aerosol generating device. 
     
     
         11 . The aerosol generating system of  claim 9 , wherein a length of the heating element is less than a sum of a length of the first segment and a length of the second segment.