Abstract: A method for controlling the heating of a susceptor of an aerosol-generating device is described, the susceptor being inductively heated by an oscillating circuit driven by an inverter at an operating frequency. The method includes a power delivery mode of the aerosol-generating device, a step of updating the operating frequency being performed during the power delivery mode and including the following sub-steps: determining, using a controller, the resonant frequency of the oscillating circuit during heat of the susceptor; and setting, using the controller, the operating frequency at the determined resonant frequency. The updating step is continuously repeated during power delivery mode of the aerosol-generating device.

Abstract: A heating system for an aerosol generation assembly, includes a coil, a susceptor and an oscillation circuitry configured to generate AC current on the coil from a DC current provided by the battery. The oscillation circuitry comprises includes at least one power circuit including two power transistors (Q1A, Q1B) and a bias line (LA, LB) for each power transistor (Q1A, Q1B). Each power transistor (Q1A, Q1B) includes a gate terminal connected to the corresponding bias line (LA, LB) and able to control the current between the corresponding source and drain terminals. The oscillation circuitry further includes a microcontroller connected to both bias lines (LA, LB) and able to generate a voltage signal on each of the bias lines (LA, LB). The at least one power circuit further includes a potential divider defining an output terminal (T) connected to the microcontroller.

Abstract: A method for controlling the heating of a susceptor of an aerosol-generating device is described, the susceptor being inductively heated by an oscillating circuit driven by an inverter, an optional boost converter being connected between a power supply unit and the inverter, the boost converter and being configured to step-up voltage from an input voltage supplied from the power supply unit to an output voltage delivered to the inverter. The method includes a power delivery mode of the aerosol-generating device and a temperature identification mode of the aerosol-generating device in which the amount of power supplied to the inverter is lower than the amount of power supplied during the power delivery mode. The method includes determining the temperature of the susceptor, e.g. based on a determined resonant frequency or resonant capacitor voltage of the oscillating circuit.

Abstract: The present invention concerns a method for controlling a heating system for an aerosol generation assembly containing a vaporizable material. The method includes controlling the temperature of a susceptor, during a pre heating phase, based on at least one vaporizable material characteristic inherent to the vaporizable material, at least one device characteristic inherent to the aerosol generation assembly, or on an ambient characteristic inherent to the ambient area; and controlling the temperature of the susceptor, during a heating phase, based on temperature measurements provided by a heating temperature sensor and a predetermined offset.

Abstract: An electronic vapour inhaler includes a chamber configured so that a user can place a cartridge into said chamber, an induction coil arranged to extend around the chamber, a temperature sensor configured to measure a temperature inside the chamber, and a control arrangement arranged to control operation of the induction coil based on the temperature measured by the temperature sensor to maintain a predetermined temperature inside the chamber.

Abstract: An electronic vapour inhaler includes a chamber configured so that a user can place a cartridge into said chamber, an induction coil arranged to extend around the chamber, a temperature sensor configured to measure a temperature inside the chamber, and a control arrangement arranged to control operation of the induction coil based on the temperature measured by the temperature sensor to maintain a predetermined temperature inside the chamber.

Abstract: A cartridge for an electronic vapour inhaler is provided and includes an elongate induction heatable element and a flavour-release medium adhered to a surface of the elongate induction heatable element. The induction heatable element can include a tube having a wall with inner and outer wall surfaces and the flavour-release medium can be adhered to the outer or inner wall surface.

Abstract: An induction heating assembly for a vapour generating device includes an induction coil and a heating compartment arranged to receive an induction heatable cartridge. A first electromagnetic shield layer is arranged outward of the induction coil and a second electromagnetic shield layer is arranged outward of the first electromagnetic shield layer. The first and second electromagnetic shield layers differ in one or both of their electrical conductivity and their magnetic permeability.

Abstract: An induction heating assembly for a vapour generating device includes an induction coil and a low-pass filter positioned adjacent to the induction coil. The low-pass filter is electrically connected to the induction coil to act as a low-pass filter for the induction coil and is shaped to extend substantially across at least one side of the induction coil to provide an electromagnetic shield for the induction coil.

Abstract: An induction heating assembly for a vapour generating device comprises includes an induction coil and a heating compartment arranged to receive an induction heatable cartridge. A first electromagnetic shield layer is arranged outward of the induction coil and a second electromagnetic shield layer is arranged outward of the first electromagnetic shield layer. The first and second electromagnetic shield layers differ in one or both of their electrical conductivity and their magnetic permeability.

Abstract: An aerosol generating system comprises an aerosol generating substrate, an inductor for generating a primary electromagnetic field, a primary susceptor configured to be inductively heated by the primary electromagnetic field and to solely heat the aerosol generating substrate, and a secondary susceptor configured to solely generate a secondary electromagnetic field. The secondary electromagnetic field is generated under the influence of the primary electromagnetic field and acts in opposition to the primary electromagnetic field.

Abstract: A method is provided for operating an electronic vapour inhaler comprising an induction heating arrangement, the induction heating arrangement comprising an induction coil for generating an alternating electromagnetic field to heat an induction heatable element and thereby heat a non-liquid flavour-release medium. The method comprises intermittently energising the induction coil to generate an intermittent alternating electromagnetic field which provides pulsed heating and cooling of the induction heatable element.

Abstract: A method is provided for operating an electronic vapour inhaler (10) comprising an induction heating arrangement (34), the induction heating arrangement (34) comprising an induction coil (36) for generating an alternating electromagnetic field to heat an induction heatable element (28) and thereby heat a non-liquid flavour-release medium (30). The method comprises intermittently energising the induction coil (36) to generate an intermittent alternating electromagnetic field which provides pulsed heating and cooling of the induction heatable element (28).

Abstract: An electronic vapour inhaler includes a chamber configured so that a user can place a cartridge into said chamber, an induction coil arranged to extend around the chamber, a temperature sensor configured to measure a temperature inside the chamber, and a control arrangement arranged to control operation of the induction coil based on the temperature measured by the temperature sensor to maintain a predetermined temperature inside the chamber.

Abstract: A cartridge for an electronic vapour inhaler is provided and includes an elongate induction heatable element and a flavour-release medium adhered to a surface of the elongate induction heatable element. The induction heatable element can include a tube having a wall with inner and outer wall surfaces and the flavour-release medium can be adhered to the outer or inner wall surface.

Abstract: A cartridge for an electronic vapour inhaler is provided and includes an elongate induction heatable element and a flavour-release medium adhered to a surface of the elongate induction heatable element. The induction heatable element can include a tube having a wall with inner and outer wall surfaces and the flavour-release medium can be adhered to the outer or inner wall surface.

Abstract: An induction heating assembly for a vapour generating device includes an induction coil and a heating compartment arranged to receive an induction heatable cartridge. A first electromagnetic shield layer is arranged outward of the induction coil and a second electromagnetic shield layer is arranged outward of the first electromagnetic shield layer. The first and second electromagnetic shield layers differ in one or both of their electrical conductivity and their magnetic permeability.

Abstract: An induction heating assembly for a vapour generating device includes an induction coil and a low-pass filter positioned adjacent to the induction coil. The low-pass filter is electrically connected to the induction coil to act as a low-pass filter for the induction coil and is shaped to extend substantially across at least one side of the induction coil to provide an electromagnetic shield for the induction coil.

Abstract: A capsule 26 for an electronic vapour inhaler comprises a shell 28 containing a flavour-release medium 40 and one or more induction heatable elements 42 disposed inside the shell 28 and arranged to heat the flavour-release medium 40 to produce a vapour for inhalation by a user. At least part of the shell 28 is formed of an air permeable material.

Abstract: A capsule 26 for an electronic vapour inhaler comprises a shell 28 containing a flavour-release medium 40 and one or more induction heatable elements 42 disposed inside the shell 28 and arranged to heat the flavour-release medium 40 to produce a vapour for inhalation by a user. At least part of the shell 28 is formed of an air permeable material.