Inductively coupled heater

Abstract

An aerosol-generating device is provided, including: a main body including a primary coil and a power supply; and a mouthpiece including a secondary coil, a resistive heating element, and a heating chamber configured to receive a solid aerosol-forming substrate, the resistive heating element being arranged at least partly around the heating chamber, the mouthpiece being detachably connectable to the main body, and the aerosol-generating device being configured such that the primary coil and the secondary coil are inductively coupled when the mouthpiece is connected to the main body. An aerosol-generating system, including the aerosol-generating device and an aerosol-generating article is also provided. A method for forming an aerosol in an aerosol-generating device is also provided.

1 .- 14 . (canceled) 
     
     
         15 . An aerosol-generating device, comprising:
 a main body comprising a primary coil and a power supply; and   a mouthpiece comprising:
 a secondary coil, 
 a resistive heating element, and 
 a heating chamber configured to receive a solid aerosol-forming substrate, 
 wherein the resistive heating element is arranged at least partly around the heating chamber, 
   wherein the mouthpiece is detachably connectable to the main body, and   wherein the aerosol-generating device is configured such that the primary coil and the secondary coil are inductively coupled when the mouthpiece is connected to the main body.   
     
     
         16 . The aerosol-generating device according to  claim 15 , wherein there is no wired connection between the main body and the mouthpiece. 
     
     
         17 . The aerosol-generating device according to  claim 15 , wherein the primary coil and the secondary coil are arranged at a distal end of the heating chamber with respect to a longitudinal axis of the aerosol-generating device. 
     
     
         18 . The aerosol-generating device according to  claim 15 , wherein the primary coil and the secondary coil are arranged coaxially around a longitudinal central axis of the aerosol-generating device when the mouthpiece is connected to the main body. 
     
     
         19 . The aerosol-generating device according to  claim 15 , wherein the secondary coil is arranged at least partly around the primary coil when the mouthpiece is connected to the main body. 
     
     
         20 . The aerosol-generating device according to  claim 15 , wherein the aerosol-generating device is further configured such that electric power transferred from the primary coil to the secondary coil via inductive coupling is used to heat the resistive heating element. 
     
     
         21 . The aerosol-generating device according to  claim 20 , wherein the aerosol-generating device is further configured such that the electric power used to heat the resistive heating element is supplied from the secondary coil to the resistive heating element by a wired connection. 
     
     
         22 . The aerosol-generating device according to  claim 15 , wherein the aerosol-generating device is further configured to supply an alternating current induced in the secondary coil to the resistive heating element. 
     
     
         23 . The aerosol-generating device according to  claim 22 , wherein the mouthpiece further comprises a rectifier arranged in electric connection between the secondary coil and the resistive heating element and configured to supply direct current to the resistive heating element. 
     
     
         24 . The aerosol-generating device according to  claim 15 , wherein the primary coil and the secondary coil are helical coils. 
     
     
         25 . The aerosol-generating device according to  claim 24 , wherein the primary coil and the secondary coil have the same number of turns. 
     
     
         26 . The aerosol-generating device according to  claim 15 , wherein the aerosol-generating device is a heat-not-burn device. 
     
     
         27 . An aerosol-generating system, comprising the aerosol-generating device according to  claim 15  and an aerosol-generating article comprising the aerosol-forming substrate, wherein the aerosol-generating article is configured to be at least partly inserted into a heating chamber of the aerosol-generating device, and wherein the aerosol-forming substrate is a solid aerosol-forming substrate. 
     
     
         28 . A method for forming an aerosol in an aerosol-generating device, comprising steps of:
 generating an alternating electric current in a primary coil housed within a main body of the aerosol-generating device;   inducing, by an alternating field produced by the alternating current in the primary coil, an electric current in a secondary coil inductively coupled to the primary coil and housed within a mouthpiece of the aerosol-generating device, the mouthpiece being detachably connected to the main body and the mouthpiece comprising a heating chamber configured to receive an aerosol-forming substrate;   resistively heating, by means of the electric current induced in the secondary coil, a resistive heating element in wired connection to the secondary coil, wherein the resistive heating element is arranged at least partly around the heating chamber; and   generating the aerosol from a solid aerosol-forming substrate in thermal contact with the resistive heating element.