Aerosol provision device

Abstract

An aerosol provision device 902 is disclosed comprising an aerosol generating chamber 925 , one or more heating elements 924 arranged to heat, in use, an aerosol generating article 904 located within the aerosol generating chamber 925 , a control system arranged to activate the one or more heating elements 924 at a time T 0 and one or more valves 951 arranged to prevent the onward transmission of aerosol generated within the aerosol generating chamber 925 until a later time T 1 , wherein T 1 >T 0.

1 . An aerosol provision device comprising:
 an aerosol generating chamber;   one or more heating elements arranged to heat, in use, an aerosol generating article located within the aerosol generating chamber;   a control system arranged to activate the one or more heating elements at a time T 0 ; and   one or more valves arranged to prevent the onward transmission of aerosol generated within the aerosol generating chamber until a later time T 1 , wherein T 1 >T 0 .   
     
     
         2 . An aerosol provision device as claimed in  claim 1 , wherein the one or more valves are located at an exit region of the aerosol generating chamber and are arranged to prevent aerosol from exiting the aerosol generating chamber until time T 1 . 
     
     
         3 . An aerosol provision device as claimed in  claim 1 , further comprising an aerosol holding chamber located downstream of the aerosol generating chamber. 
     
     
         4 . An aerosol provision device as claimed in  claim 3 , wherein the one or more valves are located at an exit region of the aerosol holding chamber and are arranged to prevent aerosol from exiting the aerosol holding chamber until time T 1 . 
     
     
         5 . An aerosol provision device as claimed in  claim 1 , wherein the control system is arranged to selectively control the one or more valves: (i) in response to activation or deactivation of one or more heating elements; (ii) as a function of time; (iii) according to a predetermined timing profile; or (iv) according to one or more user determined settings. 
     
     
         6 . An aerosol provision device as claimed in  claim 1 , wherein the aerosol provision device further comprising a mouthpiece. 
     
     
         7 . An aerosol provision device as claimed in  claim 6 , further comprising one or more aerosol flow paths arranged between an exit of the aerosol generating chamber or an exit of an aerosol holding chamber and the mouthpiece in order to direct or transmit aerosol which has been released by the one or more valves to the mouthpiece. 
     
     
         8 . An aerosol provision device as claimed in  claim 1 , further comprising a plurality of aerosol generating regions, wherein one or more or each aerosol generating region comprises at least one air supply hole in fluid communication with an external atmosphere. 
     
     
         9 . An aerosol provision system comprising:
 an aerosol provision device as claimed in  claim 1 ; and   an aerosol generating article comprising portions of aerosol generating material.   
     
     
         10 . An aerosol provision system as claimed in  claim 9 , wherein either: (i) each portion of aerosol generating material is substantially the same; or (ii) at least some of the portions of aerosol generating material are substantially different. 
     
     
         11 . An aerosol provision system as claimed in  claim 9 , wherein the aerosol generating article comprises a substantially planar aerosol generating article. 
     
     
         12 . An aerosol provision system as claimed in  claim 11 , wherein the planar aerosol generating article comprises a plurality of aerosol generating regions. 
     
     
         13 . An aerosol provision system as claimed in  claim 12 , wherein, in use, the aerosol generating article is located adjacent a plurality of heating elements. 
     
     
         14 . An aerosol provision system as claimed in  claim 12 , wherein, in use, the aerosol generating article is located so that one or more aerosol generating regions are located adjacent a heating element, wherein the aerosol generating article is rotated or moved relative to the heating element so that one or more aerosol generating regions are moved into proximity to the heating element. 
     
     
         15 . A method of generating an aerosol comprising:
 providing an aerosol provision device as claimed in  claim 1 ; and   using the one or more valves to prevent the onward transmission of aerosol generated within the aerosol generating chamber until a time T 1 , wherein T 1 >T 0 .