IL307254A - Inductively coupled heater - Google Patents

Claims (13)

1. - 22 - CLAIMS 1. 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 for receiving 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 device is configured such that the primary coil and the secondary coil are inductively coupled when the mouthpiece is connected to the main body.

2. The aerosol-generating device according to claim 1, wherein there is no wired connection between the main body and the mouthpiece.

3. The aerosol-generating device according to any of the preceding claims, 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 device.

4. The aerosol-generating device according to any of the preceding claims, wherein the primary coil and the secondary coil are arranged coaxially around a longitudinal central axis of the device when the mouthpiece is connected to the main body.

5. The aerosol-generating device according to any of the preceding claims, wherein the secondary coil is arranged at least partly around the primary coil when the mouthpiece is connected to the main body.

6. The aerosol-generating device according to any of the preceding claims, wherein the device is 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.

7. The aerosol-generating device according to claim 6, wherein the device is configured such that the electric power used for heating the resistive heating element is supplied from the secondary coil to the resistive heating element by a wired connection. - 23 -

8. The aerosol-generating device according to any of the preceding claims, wherein the device is configured to supply an alternating current induced in the secondary coil to the resistive heating element.

9. The aerosol-generating device according to claim 8, wherein the mouthpiece comprises a rectifier arranged in electric connection between the secondary coil and the resistive heating element to supply direct current to the resistive heating element.

10. The aerosol-generating device according to any of the preceding claims, wherein the primary coil and the secondary coil are helical coils, preferably, wherein both coils have the same number of turns.

11. The aerosol-generating device according to any of the preceding claims, wherein the aerosol-generating device is a heat-not-burn device.

12. An aerosol-generating system, comprising the aerosol-generating device according to any of the preceding claims 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.

13. A method for forming an aerosol in an aerosol-generating device, comprising steps of generating an alternating electric current in a primary coil being 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 being inductively coupled to the primary coil and being 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 for receiving 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 an aerosol from a solid aerosol-forming substrate in thermal contact with the resistive heating element. 35