Ceramic Wick and Targeted Heating

Abstract

A system includes: a cylindrical ceramic wick for an aerosol generating device and a susceptor surrounding at least part of the wick. The wick has an outer surface, a hollow core and a base. The base includes an indentation arranged such that, when, in use, the indentation engages with a cylindrical cup, defining an airflow path for allowing air to flow from the exterior of the wick into the hollow core. The outer surface includes a raised portion arranged such that, when, in use, a susceptor engages with the wick, the raised portion abuts the susceptor. The susceptor includes perforations, spaced axially on the susceptor, and arranged such that regions are formed between two axially adjacent perforations, the regions overlap with the raised portion and when, in use, an eddy current flow is induced in the susceptor, the flow of the eddy current is concentrated in the regions.

1 . A cylindrical ceramic wick for an aerosol generating device comprising an outer surface, a hollow core and a base, wherein
 the base comprises at least one indentation arranged such that, when, in use, the indentation engages with a cylindrical cup, an airflow path for allowing air to flow from the exterior of the wick into the hollow core is defined; and   the outer surface comprises a raised portion arranged such that, when, in use, a susceptor engages with the wick, the raised portion abuts the susceptor.   
     
     
         2 . The wick of  claim 1 , wherein the at least one raised portion extends along a longitudinal axis of the wick. 
     
     
         3 . The wick of  claim 1 , wherein the at least one raised portion comprises between 2 and 20 raised portions. 
     
     
         4 . The wick of  claim 3 , wherein the at least one raised portion comprises between 5 and 15 raised portions. 
     
     
         5 . The wick of  claim 4 , wherein the at least one raised portion comprises between 8 and 12 raised portions. 
     
     
         6 . The wick of  claim 1 , wherein the at least one raised portions cover between 30% to 80% of the outer surface. 
     
     
         7 . The wick of  claim 6 , wherein the at least one raised portions covers between 50% to 60% of the outer surface. 
     
     
         8 . A susceptor for a cylindrical wick, comprising at least one plurality of perforations, wherein the perforations are spaced axially on the susceptor, and arranged such that regions are formed between two axially adjacent perforations and when, in use, an eddy current flow is induced in the susceptor, the flow of the eddy current is concentrated in the regions. 
     
     
         9 . The susceptor of  claim 8 , wherein the at least one plurality of perforations comprises between 2 and 20 pluralities spaced circumferentially on the susceptor. 
     
     
         10 . The susceptor of  claim 9 , wherein the at least one plurality of perforations comprises between 5 and 15 pluralities spaced circumferentially on the susceptor. 
     
     
         11 . The susceptor of  claim 10 , wherein the at least one plurality of perforations comprises between 8 and 12 pluralities spaced circumferentially on the susceptor. 
     
     
         12 . The susceptor of  claim 8 , wherein an area of the perforations varies along an axial direction of the susceptor. 
     
     
         13 . The susceptor of  claim 8 , wherein an area of the regions varies along an axial direction of the susceptor. 
     
     
         14 . The susceptor of  claim 8 , wherein the perforations are circular, with a diameter of between 0.5 mm and 3 mm. 
     
     
         15 . A system, comprising:
 a cylindrical ceramic wick for an aerosol generating device comprising an outer surface, a hollow core and a base, wherein   the base comprises at least one indentation arranged such that, when, in use, the indentation engages with a cylindrical cup, an airflow path for allowing air to flow from the exterior of the wick into the hollow core is defined; and   the outer surface comprises a raised portion arranged such that, when, in use, a susceptor engages with the wick, the raised portion abuts the susceptor; and   a susceptor surrounding at least part of the cylindrical wick, comprising at least one plurality of perforations, wherein the perforations are spaced axially on the susceptor, and arranged such that regions are formed between two axially adjacent perforations, the regions overlap with the at least one raised portion and when, in use, an eddy current flow is induced in the susceptor, the flow of the eddy current is concentrated in the regions.   
     
     
         16 . An aerosol generating device comprising the wick of  claim 1 . 
     
     
         17 . An aerosol generating device comprising the susceptor of  claim 8 . 
     
     
         18 . An aerosol generating device comprising the system of  claim 15 .