Abstract: An aerosol-generating device is provided, including: a device cavity having proximal and distal ends, the proximal end of the cavity to receive an aerosol-generating article; an inductive heating arrangement to heat the substrate and including: a susceptor arrangement heatable by penetration with a varying magnetic field to heat the substrate, a first LC circuit having a first resonance frequency and including a first inductor coil towards the proximal end and a first capacitor, and a second LC circuit having a second resonance frequency different from the first resonance frequency and including a second inductor coil towards the distal end and a second capacitor, and having a different number of turns than the first coil; and a controller to initiate heating of the substrate by driving a first varying current in the first coil and subsequently driving a second varying current in the second coil.

Abstract: An electronic aerosol-generating device includes a housing extending between first and second ends along a longitudinal axis. The second end of the housing defines a cavity for receiving a consumable containing an aerosol generating substrate. The device further includes a heating component comprising a heating element extending along the longitudinal axis within the cavity and configured to penetrate into the aerosol generating substrate when the consumable is inserted into the cavity. The heating element comprises a material having a Curie temperature of less than 500° C. The device also includes an inductor comprising an inductor coil positioned to transfer magnetic energy to the heating element. The inductor is configured to induce eddy currents and/or hysteresis losses in the heating element. The device further includes a power supply operably connected to the inductor and control electronics operably connected to the power supply and configured to control heating of the heating element.

Abstract: An aerosol-generating device is provided, including a housing having a chamber; an induction coil disposed around at least a portion of the chamber; a heating compartment configured to receive an aerosol-generating article and being detachably insertable into the chamber of the housing, the heating compartment including a cavity configured to receive at least a portion of the aerosol-generating article; and a heating element arrangeable within the cavity of the heating compartment, the heating element extending into the cavity in a longitudinal direction of the cavity, and being configured to penetrate an aerosol-forming substrate in the aerosol-generating article and received in the cavity.

Abstract: An aerosol-generating device includes a receiving sleeve which in turn includes an inner receiving zone for receiving a first aerosol-forming substrate, and an outer receiving zone extending across at least a portion of an outer circumferential periphery of the receiving sleeve for receiving a second aerosol-forming substrate. The device includes a heater for heating the first aerosol-forming substrate or the second aerosol-forming substrate.

Abstract: An electronic aerosol-generating device includes a housing extending between first and second ends along a longitudinal axis. The second end of the housing defines a cavity for receiving a consumable containing an aerosol generating substrate. The device further includes a heating component comprising a heating element extending along the longitudinal axis within the cavity and configured to penetrate into the aerosol generating substrate when the consumable is inserted into the cavity. The heating element comprises a material having a Curie temperature of less than 500° C. The device also includes an inductor comprising an inductor coil positioned to transfer magnetic energy to the heating element. The inductor is configured to induce eddy currents and/or hysteresis losses in the heating element. The device further includes a power supply operably connected to the inductor and control electronics operably connected to the power supply and configured to control heating of the heating element.

Abstract: An electronic aerosol-generating device includes a housing extending between first and second ends along a longitudinal axis. The second end of the housing defines a cavity for receiving a consumable containing an aerosol generating substrate. The device further includes a heating component comprising a heating element extending along the longitudinal axis within the cavity and configured to penetrate into the aerosol generating substrate when the consumable is inserted into the cavity. The heating element comprises a material having a Curie temperature of less than 500° C. The device also includes an inductor comprising an inductor coil positioned to transfer magnetic energy to the heating element. The inductor is configured to induce eddy currents and/or hysteresis losses in the heating element. The device further includes a power supply operably connected to the inductor and control electronics operably connected to the power supply and configured to control heating of the heating element.

Abstract: An aerosol-generating device is provided, including: a device cavity having proximal and distal ends, the proximal end to receive an aerosol-generating article; an inductive heating arrangement to heat the substrate and including: a susceptor arrangement heatable by penetration with a varying magnetic field to heat the substrate, a first LC circuit having a first resonance frequency and including a first inductor coil arranged towards the proximal end and a first capacitor, and a second LC circuit having a second resonance frequency different from the first resonance frequency and including a second inductor coil arranged towards the distal end and a second capacitor, and the second coil has a different number of turns than that of the first coil; and a controller to initiate heating of the substrate by driving a first varying current in the first coil and subsequently driving a second varying current in the second coil.

Abstract: An inductive heating arrangement is provided, including: a first inductor coil to generate a first varying magnetic field when a varying electric current flows through the first coil; a second inductor coil to generate a second varying magnetic field when a varying electric current flows through the second coil; and a tubular-shaped flux concentrator around the first coil and to distort the first field, including a main portion around the first coil and having an inner diameter, first and second ends, a first end portion having an inner diameter smaller than that of the main portion, and a second end portion having an inner diameter smaller than that of the main portion, an inner surface of the flux concentrator defining an annular channel between the first and second end portions, and the first inductor coil being disposed within the annular channel between the first and second end portions.

Abstract: An aerosol-generating system includes a liquid-storage portion configured to hold a liquid aerosol-forming substrate, a first electrode, a second electrode, and a control system. The second electrode is spaced from the first electrode. At least a portion of the liquid storage portion is arranged between the first electrode and the second electrode. The control system is configured to measure an electrical quantity between the first electrode and the second electrode, and detect a draw on the aerosol-generating system based on the measured electrical quantity information.

Abstract: The present invention relates to an electrical heating assembly of an aerosol-generating device for resistively heating an aerosol-forming substrate. The heating assembly comprises a control circuit configured to provide an AC driving current. The heating assembly further comprises an electrically resistive heating element for heating the aerosol-forming substrate. The heating element is operatively coupled with the control circuit and configured to heat up due to Joule heating when passing an AC driving element provided by the control circuit current through the heating element. The present invention further relates to an aerosol-generating device for use with an aerosol-forming substrate, wherein the aerosol-generating device comprises a heating assembly according to the invention. The invention also provides a method for resistively heating an aerosol-forming substrate by passing an AC driving current through a resistive heating element.

Abstract: An aerosol-generating device is provided, including a housing defining a chamber having an open end configured for insertion of an aerosol-generating article into the chamber and a closed end disposed opposite the open end; a flat spiral inductor coil disposed at the closed end of the chamber; a susceptor element disposed within the chamber at the closed end; and a power supply and a controller connected to the flat spiral inductor coil and configured to provide an alternating electric current to the flat spiral inductor coil such that the flat spiral inductor coil is configured to generate an alternating magnetic field to inductively heat the susceptor element and thereby to heat at least a portion of an aerosol-generating article received within the chamber.

Abstract: An aerosol-generating device is provided, including: a housing having a chamber configured to receive at least a portion of an aerosol-forming article; a first helical inductor coil disposed at least partially around the chamber; a second helical inductor coil disposed at least partially around, or adjacent to, the chamber; and an elongate susceptor element configured to be inductively heatable by one or both of the first and the second helical inductor coils to heat at least a portion of an aerosol-forming substrate which is part of the aerosol-forming article, when the aerosol-forming substrate is at least partially received in the chamber. An aerosol-generating system including the aerosol-generating device is also provided.

Abstract: An aerosol-generating device is provided, including a housing defining a chamber configured to receive at least a portion of an aerosol-generating article; an inductor coil disposed around at least a portion of the chamber; an elongate susceptor element configured for removable attachment to the housing within the chamber and projecting into the chamber when the element is removably attached to the housing; an aperture positioned on a side of the housing, the aperture and the element being configured for insertion of the element into the chamber through the aperture and configured for removal of the element from the chamber through the aperture; and a power supply and a controller connected to the coil and to provide an alternating electric current to the coil such that the coil generates an alternating magnetic field to heat the element and thereby heat at least a portion of the article received within the chamber.

Abstract: An aerosol-generating system includes a liquid-storage portion configured to hold a liquid aerosol-forming substrate, a first electrode, a second electrode, and a control system. The second electrode is spaced from the first electrode. At least a portion of the liquid storage portion is arranged between the first electrode and the second electrode. The control system is configured to measure an electrical quantity between the first electrode and the second electrode, and detect a draw on the aerosol-generating system based on the measured electrical quantity information.

Abstract: An aerosol-generating device is provided, including a housing having a chamber configured to receive at least a portion of an aerosol-forming article; a first coil disposed at least partially around, or adjacent to, the chamber; and a second coil disposed at least partially around, or adjacent to, the chamber, the first coil being part of a first resonant circuit having a first resonant frequency and the second coil forming part of a second resonant circuit having a second resonant frequency.

Abstract: An aerosol-generating device is provided, including: a housing having a chamber configured to receive at least a portion of an aerosol-generating article; an inductor coil disposed around at least a portion of the chamber; a plurality of elongate susceptor elements projecting into the chamber and spaced apart from each other, the susceptor elements each extending substantially parallel to a magnetic axis of the inductor coil; and a power supply and a controller connected to the inductor coil and configured to provide an alternating electric current to the inductor coil such that the inductor coil generates an alternating magnetic field to heat the susceptor elements and thereby heat at least a portion of the article received in the chamber, the inductor coil being helical and having a non-circular cross-sectional shape. An aerosol-generating system including the device, the article, and the susceptor elements, is also provided.

Abstract: An aerosol-generating system includes a storage portion configured to hold an aerosol-forming substrate, a first electrode, a second electrode spaced from the first electrode, and a control system. At least a portion of the storage portion is between the first electrode and the second electrode. The portion of the storage portion between the first electrode and the second electrode holds the aerosol-forming substrate when the aerosol-forming substrate is held in the storage portion. The control system is configured to measure an electrical quantity between the first electrode and the second electrode, and identify the liquid aerosol-forming substrate held in the storage portion based on the measured electrical quantity information.

Abstract: An aerosol-generating device is provided, including one or more DC power sources; a load network including an inductor and a capacitor connected in series; first drive circuitry connected to the DC power source(s) and across the network and being configured to provide a first voltage drop across the network; second drive circuitry connected to the DC power source(s) and across the network and being configured to provide a second voltage drop across the network, the second voltage drop being in an opposite direction to the first voltage drop; and a controller connected to the first and the second drive circuitry and being configured to control the first and the second drive circuitry so that both the first and the second voltage drops are provided across the network periodically and so that the second voltage drop is not provided across the network simultaneously with the first voltage drop.

Abstract: An aerosol-generating device is provided, including a housing having a chamber sized to receive at least a portion of an aerosol-forming substrate, the chamber defining a heating zone; a first coil disposed at least partially around, or adjacent to, the heating zone; and a second coil disposed at least partially around, or adjacent to, the heating zone, the first coil being a drive coil couplable to a source of alternating current, and the second coil being a resonant coil of a resonant circuit, the second coil being inductively couplable to the first coil.

Abstract: A heater assembly (300) for an aerosol-generating system, the heater assembly comprising: a fluid permeable heater (322) for heating a liquid aerosol-forming substrate to form an aerosol; a porous member (324) for conveying liquid aerosol-forming substrate to the fluid permeable heater, wherein the fluid permeable heater is deposited on to a porous outer surface (324a) of the porous member, the fluid permeable heater comprising: a first layer (326) of deposited electrically conductive material; a second layer (328) of deposited electrically conductive material, wherein the electrical conductivity of the second layer is greater than the electrical conductivity of the first layer such that the second layer modifies the electrical resistance of the fluid permeable heater to a required resistance.