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   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, and   wherein an inner diameter ratio of the first tubular structure to the second tubular structure is in a range of 1:1.25 to 1:3.   
     
     
         2 . 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 1:1.5 to 1:2. 
     
     
         3 . 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. 
     
     
         4 . The aerosol-generating article of  claim 1 , wherein the average cross-sectional area of the second hollow is 2 times or more and 2.5 times or less than the average cross-sectional area of the first hollow. 
     
     
         5 . The aerosol-generating article of  claim 1 , wherein an inner diameter difference between the first tubular structure and the second tubular structure is in a range of 1 mm to 2.5 mm. 
     
     
         6 . The aerosol-generating article of  claim 1 , wherein:
 an inner diameter of the first tubular structure is in a range of 2.0 mm to 3.0 mm; and   
     
     
         7 . The aerosol-generating article of  claim 6 , wherein:
 an inner diameter of the second tubular structure is in a range of 3.5 mm to 5.0 mm.   
     
     
         8 . The aerosol-generating article of  claim 1 , wherein:
 an inner diameter of the first tubular structure is in a range of 2.4 mm to 2.6 mm; and   an inner diameter of the second tubular structure is in a range of 4.0 mm to 4.4 mm.   
     
     
         9 . The aerosol-generating article of  claim 1 , wherein a cross-sectional area of a first portion of the second hollow is smaller than a cross-sectional area of a second portion thereof. 
     
     
         10 . The aerosol-generating article of  claim 1 , wherein a length of the cooling structure is at most 3.5 times larger than an inner diameter of the second tubular structure.