Aerosol Generating Device Comprising a Heating Plate Comprising a Ceramic Part and a Metal Part and Associated Method for Controlling

Abstract

An aerosol generating device configured to operate with a flat-shaped tobacco article and includes a flat-shaped heating chamber. The heating chamber is configured to receive the flat-shaped tobacco article and includes a heating plate forming at least partially a wall of the heating chamber. The heating plate comprising includes a ceramic part and a metal part different from the ceramic part and engaged with the ceramic part, both parts being arranged to heat the flat-shaped tobacco article.

1 . An aerosol generating device configured to operate with a flat-shaped tobacco article and comprising a flat-shaped heating chamber;
 wherein the heating chamber is configured to receive the flat-shaped tobacco article and comprises a heating plate forming at least partially a wall of the heating chamber; and   wherein the heating plate comprises a ceramic part and a metal part different from the ceramic part and engaged with the ceramic part, the metal part forming a metal flat surface portion, wherein the ceramic and the metal parts are arranged to heat the flat-shaped tobacco article.   
     
     
         2 . The aerosol generating device according to  claim 1 , wherein the ceramic part extends around the metal part. 
     
     
         3 . The aerosol generating device according to  claim 1 , wherein the ceramic part defines a recess portion receiving the metal part, the recess portion being a blind hole and having a depth substantially equal to 50% of a depth of the heating plate. 
     
     
         4 . The aerosol generating device according to  claim 1 , wherein the ceramic part and the metal part engaged with the ceramic part form a flat surface configured to be in contact with or face the flat-shaped tobacco article, the flat surface comprising the metal flat surface portion. 
     
     
         5 . The aerosol generating device according to  claim 4 , wherein the metal part forms at least 50%, of the total area of the flat surface. 
     
     
         6 . The aerosol generating device according to  claim 3 , wherein the recess portion forms a shape complementary to the external shape of the metal part to tightly fit the metal part. 
     
     
         7 . The aerosol generating device according to  claim 3 , wherein the recess portion forms a substantially parallelepiped shape with rounded corners. 
     
     
         8 . The aerosol generating device according to  claim 1 , wherein the heating plate is configured to extend substantially along the whole area of a tobacco portion in the flat-shaped tobacco article. 
     
     
         9 . The aerosol generating device according to  claim 8 , wherein the ceramic and metal parts are configured to be in contact with or face said tobacco portion of the flat-shaped tobacco article. 
     
     
         10 . The aerosol generating device according to  claim 1 , wherein the ceramic part is configured to be heated by thermal conduction by the metal part. 
     
     
         11 . The aerosol generating device according to  claim 1 , wherein the heating chamber further comprises a second heating plate, the heating plate and the second heating plate forming at least partially opposite walls of the heating chamber. 
     
     
         12 . The aerosol generating device according to  claim 1 , wherein the heating chamber further comprises a heating element configured to heat the ceramic part. 
     
     
         13 . The aerosol generating device according to  claim 12 , wherein the heating element is a resistive heating element arranged adjacent to the ceramic part. 
     
     
         14 . The aerosol generating device according to  claim 13 , wherein the heating element comprises a magnetic element and a plurality of susceptors in the ceramic part, the magnetic element configured to cause heating of the plurality of susceptors by magnetic induction. 
     
     
         15 . A method for controlling an aerosol generating device according to  claim 1 , comprising a step of heating the metal part, the heated metal part heating the ceramic part by thermal conduction. 
     
     
         16 . The aerosol generating device according to  claim 13 , wherein the heating element is a heating track or a polyimide film heater arranged adjacent to the ceramic part. 
     
     
         17 . The aerosol generating article according to  claim 16 , wherein the heating element is arranged on an external surface of the ceramic part. 
     
     
         18 . The aerosol generating article according to  claim 13 , wherein the heating element is arranged on an external surface of the ceramic part.