Cigarette and aerosol generation device for cigarette

Abstract

Provided is a cigarette including: a tobacco rod; a first air flow delivery element adjacent to a first end of the tobacco rod and having a first porosity; and a second air flow delivery element adjacent to a second end of the tobacco rod and having a second porosity greater than or equal to the first porosity, wherein the second porosity is greater than or equal to 30%.

What is claimed is: 
     
         1 . A cigarette comprising:
 a tobacco rod;   a first air flow delivery element adjacent to a first end of the tobacco rod and having a first porosity; and   a second air flow delivery element adjacent to a second end of the tobacco rod and having a second porosity greater than or equal to the first porosity,   wherein the second porosity is greater than or equal to 30%.   
     
     
         2 . The cigarette of  claim 1 , wherein the first porosity is in a range of 10% to 30%. 
     
     
         3 . The cigarette of  claim 1 , wherein a ratio of the second porosity to the first porosity is greater than or equal to 1 and less than 3. 
     
     
         4 . The cigarette of  claim 1 , wherein the second air flow delivery element has a tube shape having an inner diameter formed by a hollow. 
     
     
         5 . The cigarette of  claim 4 , wherein a ratio of the inner diameter of the second air flow delivery element to an outer diameter of the second air flow delivery element is greater than or equal to 55%. 
     
     
         6 . The cigarette of  claim 4 , wherein the inner diameter is in a range of 3.0 mm to 4.5 mm. 
     
     
         7 . The cigarette of  claim 1 , wherein the first air flow delivery element and the second air flow delivery element include cellulose acetate. 
     
     
         8 . An aerosol generating apparatus comprising:
 a case;   a heater configured to heat a cigarette comprising:
 a tobacco rod; 
 a front-end plug adjacent to a front end of the tobacco rod and having a first porosity; and 
 a filter rod adjacent to a rear end of the tobacco rod and having a second porosity greater than or equal to the first porosity, wherein the second porosity is greater than or equal to 30%; 
   a vaporizer configured to generate an aerosol by vaporizing a liquid composition and delivering the aerosol into the cigarette through the front-end plug; and   a controller configured to control operations of the heater and the vaporizer.