Aerosol-generating article with enhanced vapor production

Abstract

Provided herein is an aerosol-generating article with enhanced vapor production. The aerosol-generating article according to some embodiments of the present disclosure includes a medium portion, a support structure which is disposed downstream of the medium portion and includes a first tubular structure having a first hollow formed therein, a cooling structure which is disposed downstream of the support structure and includes a second tubular structure having a second hollow formed therein, and a mouthpiece portion which is disposed downstream of the cooling structure. Here, an upstream end of the second tubular structure may abut a downstream end of the first tubular structure, and an average cross-sectional area of the second hollow may be larger than an average cross-sectional area of the first hollow. The cross-sectional area difference enhances an air flow diffusion effect, thereby eventually improving vapor production of the aerosol-generating article.

What is claimed is: 
     
         1 . An aerosol-generating article comprising:
 a medium portion;   a support structure which is disposed downstream of the medium portion and includes a first tubular structure having a first hollow;   a cooling structure which is disposed downstream of the support structure and includes a second tubular structure which has a second hollow and is made of a paper material; and   a mouthpiece portion which is disposed downstream of the cooling structure,   wherein an upstream end of the second tubular structure abuts a downstream end of the first tubular structure,   an average cross-sectional area of the second hollow is larger than an average cross-sectional area of the first hollow.   
     
     
         2 . The aerosol-generating article of  claim 1 , wherein the average cross-sectional area of the second hollow is at least 1.5 times larger than the average cross-sectional area of the first hollow. 
     
     
         3 . The aerosol-generating article of  claim 1 , wherein the average cross-sectional area of the second hollow is at least 4 times larger than the average cross-sectional area of the first hollow. 
     
     
         4 . The aerosol-generating article of  claim 1 , wherein an inner diameter ratio of the first tubular structure to the second tubular structure is in a range of 1:1 to 1:3.5. 
     
     
         5 . The aerosol-generating article of  claim 1 , wherein an inner diameter difference between the first tubular structure and the second tubular structure is at least 1.25 mm. 
     
     
         6 . The aerosol-generating article of  claim 1 , wherein:
 an inner diameter of the first tubular structure is in a range of 2.5 mm to 4.5 mm; and   an inner diameter of the second tubular structure is in a range of 3.75 mm to 7.5 mm.   
     
     
         7 . The aerosol-generating article of  claim 1 , wherein:
 an inner diameter of the first tubular structure is 2.5 mm; and   an inner diameter of the second tubular structure is in a range of 6 mm to 7 mm.   
     
     
         8 . The aerosol-generating article of  claim 1 , wherein:
 an inner diameter of the cooling structure is in a range of 90% to 95% of an outer diameter of the cooling structure.