Electronic vapor provision device

Abstract

An electronic vapor provision device comprising a power cell and a vaporizer, wherein the vaporizer comprises a heater and a heater support, wherein one or more gaps are provided between the heater and the heater support.

1 . An electronic vapor provision device comprising a power cell and a vaporizer, wherein the vaporizer comprises a heating element and a heating element support, wherein the heating element support defines a flat substrate surface, wherein the heating element support is a rigid support made from porous ceramic so as to allow liquid storage within the heating element support. 
     
     
         2 . The electronic vapor provision device of  claim 1 , wherein one or more gaps are provided between the heating element and the heating element support. 
     
     
         3 . The electronic vapor provision device of  claim 1 , wherein the heating element is on the outside of the heating element support. 
     
     
         4 . The electronic vapor provision device of  claim 1 , wherein the heating element has a zig-zag shape which is coplanar with the substrate. 
     
     
         5 . The electronic vapor provision device of  claim 4 , wherein the heating element support has a rectangular shape, and wherein opposing corners of the zig-zag shape are aligned along respective edges of the rectangular shape. 
     
     
         6 . The electronic vapor provision device of  claim 4 , wherein the heating element passes through the flat planar substrate. 
     
     
         7 . The electronic vapor provision device of  claim 1 , wherein the heating element is a wire. 
     
     
         8 . The electronic vapor provision device  claim 1 , wherein the vaporizer further comprises a vaporization cavity, and wherein at least part of the heating element is inside the vaporization cavity. 
     
     
         9 . The electronic vapor provision device of  claim 8 , wherein the vaporizer is configured such that in use the vaporization cavity is a negative pressure region. 
     
     
         10 . The electronic vapor provision device  claim 1 , wherein the electronic vapor provision device comprises a mouthpiece section and the vaporizer is part of the mouthpiece section. 
     
     
         11 . The electronic vapor provision device of  claim 1 , wherein the heating element support is elongated in a lengthwise direction. 
     
     
         12 . The electronic vapor provision device of  claim 11 , wherein the heating element support has one or more side channels running lengthwise along the support. 
     
     
         13 . The electronic vapor provision device of  claim 1 , wherein the heating element support has a pitted surface. 
     
     
         14 . The electronic vapor provision device of  claim 1 , wherein the heating element support comprises a substrate having holes. 
     
     
         15 . An electronic vapor provision device of  claim 1 , further comprising:
 a liquid store;   a wicking element configured to wick liquid from the liquid store to the heating element for vaporizing the liquid; and   an air outlet for vaporized liquid from the heating element.   
     
     
         16 . A vaporizer for use in an electronic vapor provision device comprising:
 a power cell; and   a vaporizer, wherein the vaporizer comprises a heating element and a heating element support, wherein the heating element support defines a flat substrate surface, wherein the heating element support is a rigid support made from porous ceramic so as to allow liquid storage within the heating element support.   
     
     
         17 . The vaporizer of  claim 16 , wherein one or more gaps are provided between the heating element and the heating element support. 
     
     
         18 . The vaporizer of  claim 17 , wherein the heating element has a zig-zag shape that is coplanar with the substrate.