Aerosol-generating system with resonant circuit for cartridge recognition

Patent metadata

Field	Value
Publication number	US-12465091-B2
Application number	US-202117906675-A
Country	US
Kind code	B2
Filing date	Mar 18, 2021
Priority date	Mar 23, 2020
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

An aerosol-generating system is provided, including: a cartridge including an aerosol-forming substrate; a resonant circuit, the cartridge including at least part of the resonant circuit, the circuit being configured to resonate at a predetermined resonant frequency associated with an identity of the cartridge; and an aerosol-generating device including: a housing to removably receive the cartridge, a power source to supply power to the cartridge, and control circuitry including a controller configured to determine a resonant frequency of the resonant circuit when the cartridge is received by the device, and identify the cartridge based on the determined frequency, the cartridge having a connection end to connect the cartridge to the device and including electrical contacts to electrically connect the cartridge to the device, and the device having a connection end to connect the device to the cartridge and including electrical contacts configured to electrically connect the device to the cartridge.

First claim

The invention claimed is:

1 . An aerosol-generating system, comprising:
a cartridge including an aerosol-forming substrate; a resonant circuit, wherein the cartridge comprises at least a portion of the resonant circuit, wherein the resonant circuit is configured to resonate at a predetermined resonant frequency, and wherein the predetermined resonant frequency is associated with an identity of the cartridge; and an aerosol-generating device including:
a housing configured to removably receive the cartridge,
a power source configured to supply power to the cartridge, and
control circuitry comprising a controller configured to:
determine a resonant frequency of the resonant circuit when the cartridge is received by the aerosol-generating device, and
identify the cartridge based on the determined resonant frequency,

wherein the cartridge has a connection end configured to connect the cartridge to the aerosol-generating device, the connection end of the cartridge comprising electrical contacts configured to electrically connect the cartridge to the aerosol-generating device, and wherein the aerosol-generating device has a connection end configured to connect the aerosol-generating device to the cartridge, the connection end of the aerosol-generating device comprising electrical contacts configured to electrically connect the aerosol-generating device to the cartridge.

2 . The aerosol-generating system according to claim 1 ,
wherein the cartridge further includes an electric heater configured to heat the aerosol-forming substrate, and wherein the resonant circuit comprises the electric heater.

3 . The aerosol-generating system according to claim 1 , wherein the resonant circuit comprises a capacitor and an inductor.

4 . The aerosol-generating system according to claim 3 , wherein the cartridge comprises the inductor.

5 . The aerosol-generating system according to claim 1 ,
wherein the resonant circuit comprises a capacitor and an inductor, wherein the cartridge further includes an electric heater configured to heat the aerosol-forming substrate, wherein the resonant circuit comprises the electric heater, and wherein the electric heater comprises a coil and forms the inductor of the resonant circuit.

6 . The aerosol-generating system according to claim 4 , wherein the capacitor of the resonant circuit is connected in parallel with the inductor.

7 . The aerosol-generating system according to claim 3 , wherein the cartridge comprises the capacitor.

8 . The aerosol-generating system according to claim 1 , wherein the cartridge comprises the resonant circuit.

9 . The aerosol-generating system according to claim 3 , wherein the aerosol-generating device comprises the capacitor.

10 . The aerosol-generating system according to claim 1 , wherein the resonant circuit comprises a capacitor, and the predetermined resonant frequency of the resonant circuit is dependent on a capacitance of the capacitor and a parasitic inductance of the resonant circuit.

11 . The aerosol-generating system according to claim 1 , wherein the control circuitry is further configured to form an oscillator with the resonant circuit, the oscillator being configured to generate an oscillating signal with a frequency at the predetermined resonant frequency of the resonant circuit.

12 . The aerosol-generating system according to claim 11 , wherein the control circuitry is further configured to measure the frequency of the oscillating signal from the oscillator.

13 . A cartridge for an aerosol-generating system, the cartridge comprising:
an aerosol-forming substrate; an electric heater; a connection end configured to connect the cartridge to an aerosol-generating device, the connection end of the cartridge comprising electrical contacts configured to electrically connect the cartridge to the aerosol-generating device; and a resonant circuit, wherein the resonant circuit is configured to resonate at a predetermined resonant frequency, and wherein the predetermined resonant frequency is associated with an identity of the cartridge.

14 . The cartridge according to claim 13 , wherein the resonant circuit comprises a capacitor and an inductor.

15 . The cartridge according to claim 14 , wherein the electric heater comprises a coil and forms the inductor of the resonant circuit.

16 . An aerosol-generating device for a cartridge including a resonant circuit, the aerosol-generating device including:
a housing configured to removably receive the cartridge; a power source configured to supply power to the cartridge; a connection end configured to connect the aerosol-generating device to a cartridge, the connection end of the aerosol-generating device comprising electrical contacts configured to electrically connect the aerosol-generating device to the cartridge; and control circuitry comprising a controller configured to:
determine a resonant frequency of the resonant circuit when the cartridge is received by the aerosol-generating device, and
identify the cartridge based on the determined resonant frequency.

17 . The aerosol-generating device according to claim 16 , wherein the control circuitry is further configured to form an oscillator with the resonant circuit of the cartridge, the oscillator being configured to generate an oscillating signal with a frequency at the predetermined resonant frequency of the resonant circuit.

Assignees

• Philip Morris Products Sa

Inventors

• Courbat Jerome Christian

Classifications

• H05B3/0014

  Devices wherein the heating current flows through particular resistances · CPC title

• H03H7/00

  Multiple-port networks comprising only passive electrical elements as network components · CPC title

• A24F40/51

  Arrangement of sensors · CPC title

• A24F40/42 Primary

  Cartridges or containers for inhalable precursors · CPC title

• A24F40/46

  Shape or structure of electric heating means · CPC title