Abstract: An inductive heating device (1) for heating an aerosol-forming substrate (20) comprising a susceptor (21) comprises: a device housing (10) a DC power source (11) for providing a DC supply voltage (VDC) and a DC current (IDC) a power supply electronics (13) comprising a DC/AC converter (132), the DC/AC converter (132) comprising an LC load network (1323) comprising a series connection of a capacitor (C2) and an inductor (L2) having an ohmic resistance (RCoil), a cavity (14) in the device housing (10) for accommodating a portion of the aerosol-forming substrate (20) to inductively couple the inductor (L2) of the LC load network (1323) to the susceptor (21). The power supply electronics (13) further comprises a microcontroller (131) to determine from the DC supply voltage (VDC) and the DC current (IDC) an apparent ohmic resistance (Ra), and from the apparent ohmic resistance (Ra) the temperature (T) of the susceptor (21).

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: A cartridge is provided for an electrically heatable aerosol-generating system, the cartridge including: an aerosol-forming substrate including a liquid held in a capillary material; and a susceptor element including first and second fluid-permeable portions, the first fluid-permeable portion being disposed on a first side of the capillary material, and the second fluid-permeable portion being disposed on a second side of the capillary material opposite to the first side such that the capillary material is located in between the first and the second fluid-permeable portions of the susceptor element, the susceptor element being electrically isolated from other electrically conductive components. A heater assembly for an electrically heatable aerosol-generating system, and an electrically heatable aerosol-generating system, are 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 projecting into the chamber; 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 elongate susceptor element and thereby heat at least a portion of an aerosol-generating article received in the chamber, the elongate susceptor element including an elongate support body and at least one heating portion formed from a susceptor layer on an outer surface of the elongate support body, and the elongate support body being formed from a thermally insulative material and the susceptor layer including one or more susceptor materials.

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 at least partially within the chamber, the housing defining a recess in an inner surface of the chamber, and the inductor coil being at least partially disposed within the recess; 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 inductively heat a susceptor element and thereby heat at least a portion of the aerosol-generating article received within the inductor coil.

Abstract: An aerosol-generating device includes a housing having a first end defining a mouthpiece, a second end, and a cavity defined between the first end and the second end. The device also includes a reservoir within the cavity. The reservoir is configured to store a liquid aerosol-forming substrate. The device also includes an atomizer and a valve within the mouthpiece of the housing. The valve has a first side and an second side. The second side of the valve includes a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating.

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: There is described an aerosol-forming substrate for use in combination with an inductive heating device. The aerosol-forming substrate comprises a solid material which is capable of releasing volatile compounds that can form an aerosol upon heating of the aerosol-forming substrate and at least a first susceptor material for heating the aerosol-forming substrate. The at least first susceptor material is arranged in thermal proximity of the solid material. The aerosol-forming substrate further comprises at least a second susceptor material which has a second Curie-temperature which is lower than a first Curie-temperature of the first susceptor material. The second Curie-temperature of the second susceptor material corresponds to a predefined maximum heating temperature of the first susceptor material. There is also described an aerosol-delivery system.

Abstract: An electrically heated aerosol-generating system is provided, including an aerosol-generating device and a cartridge configured to be removably coupled with the device, the device including a device housing comprising a cavity configured to receive at least a portion of the cartridge when the device housing is engaged with the device housing, an inductor coil disposed around or adjacent to the cavity, and a power supply connected to the inductor coil and configured to provide a high frequency oscillating current to the inductor coil; and the cartridge including a cartridge housing configured to engage the device housing and containing an aerosol-forming substrate, the cartridge housing having an external surface surrounding the aerosol-forming substrate, at least a portion of the external surface being formed by a fluid permeable susceptor element configured to allow the aerosol-forming substrate, in liquid phase, to permeate therethrough.

Abstract: An aerosol-generating device includes a housing having a first end defining a mouthpiece, a second end, and a cavity defined between the first end and the second end. The device also includes a reservoir within the cavity. The reservoir is configured to store a liquid aerosol-forming substrate. The device also includes an atomizer and a valve within the mouthpiece of the housing. The valve has a first side and an second side. The second side of the valve includes a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating.

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: There is provided a susceptor assembly configured to inductively heat an aerosol-forming substrate under influence of an alternating magnetic field, the susceptor assembly including a first susceptor including a first susceptor material and a second susceptor including a second susceptor material, the first and the second susceptor materials being chosen such that during pre-heating of the susceptor assembly starting at room temperature a resistance-over-temperature profile of the susceptor assembly has a minimum value of resistance in a temperature range of ±5 degree Celsius around a Curie temperature of the second susceptor material. There is also provided an inductive heating assembly, an aerosol-generating device, and an aerosol-generating system including the susceptor assembly.

Abstract: The split airflow system for an electrically heated smoking system for generating aerosol, the split airflow system having a downstream end comprises a first channel defining a first flow route and a second channel defining a second flow route. The first flow route directs ambient air from outside the system to the downstream end of the system. The second flow route directs ambient air from outside the system towards a preferably substantially flat, fluid permeable, heating element before conveying the ambient air to the downstream end. The first channel and the second channel define a total volume of ambient air passing through the system and the first channel provides at least 50 percent of the total volume of ambient air passing through the system. The invention also refers to a method for guiding an airflow in an electrically heated smoking system for generating aerosol and an electrically heated smoking system comprising the split airflow system.

Abstract: There is provided an inductive heating assembly configured to inductively heat an aerosol-forming substrate to a pre-determined operating temperature, the heating assembly including an induction source configured to generate an alternating electromagnetic field; and a susceptor assembly configured to inductively heat the aerosol-forming substrate under influence of the alternating magnetic field generated by the induction source, the susceptor assembly including a first susceptor comprising a first susceptor material and a second susceptor including a second susceptor material having a Curie temperature at least 50 degrees Celsius below an operating temperature of the heating assembly. There is also provided an aerosol-generating device and an aerosol-generating system including the inductive heating assembly.

Abstract: There is provided an inductively heating aerosol-generating device configured to generate an aerosol by heating an aerosol-forming substrate, the device including a receiving cavity configured to receive the aerosol-forming substrate; an induction source configured to generate an alternating electromagnetic field; and a susceptor assembly configured and arranged to inductively heat the aerosol-forming substrate within the receiving cavity under influence of the alternating magnetic field generated by the induction source, the susceptor assembly including a first susceptor and a second susceptor, the first susceptor including a first susceptor material having a positive temperature coefficient of resistance, and the second susceptor including a second ferromagnetic or ferrimagnetic susceptor material having a negative temperature coefficient of resistance.

Abstract: There is provided an inductively heatable aerosol-generating article, including an aerosol-forming substrate; and a susceptor assembly configured to inductively heat the aerosol-forming substrate under influence of an alternating magnetic field, the susceptor assembly including a first susceptor and a second susceptor, the first susceptor including a first susceptor material having a positive temperature coefficient of resistance, and the second susceptor including a second ferromagnetic or ferrimagnetic susceptor material having a negative temperature coefficient of resistance. There is also provided an aerosol-generating system including the aerosol-generating article and an aerosol-generating device for the aerosol-generating article.

Abstract: There is provided an inductive heating assembly to inductively heat an aerosol-forming substrate to an operating temperature, the assembly including an induction source connected to a DC power supply to generate an alternating electromagnetic field to inductively heat a susceptor assembly including a first susceptor and a second susceptor having a Curie temperature below the operating temperature, and a controller operatively connected to the induction source and the DC power supply, to determine an actual apparent resistance of the susceptor assembly indicative of the actual temperature of the susceptor assembly, to determine a minimum value of the apparent resistance occurring during pre-heating of the susceptor assembly, and to control operation of the induction source such that the actual apparent resistance corresponds to the determined minimum value of the apparent resistance plus a pre-determined offset value of the apparent resistance to control heating of the substrate to the operating temperature.

Abstract: An aerosol delivery system includes an inductive heating device and an aerosol-forming article. The aerosol-forming article includes a plurality of aerosol-forming segments and at least two different susceptors. The inductive heating device includes a device housing including a cavity to accommodate at least a portion of the aerosol-forming article including the plurality of aerosol-forming segments, a coil arranged to surround the cavity, an electrical power source, and a power supply electronics connected to the electrical power source and to the coil. The power supply electronics supplies an alternating current to the coil to generate an alternating magnetic field having magnetic field strength and a frequency to, in at least one aerosol-forming segment, generate a thermal power which is greater than the rate of heat loss of this aerosol-forming segment.

Abstract: A cartridge for an aerosol-generating system is provided, including a storage portion to hold a liquid aerosol-forming substrate; and a heater assembly including an electrical heating element to heat the substrate to form aerosol, and a capillary body to convey the substrate to the element disposed at a porous outer surface of the body, the storage portion being at a first portion of the cartridge, a first airflow channel being at another portion of the cartridge adjacent to the element and defining a first airflow path extending from an air inlet toward the element in a first direction, a second airflow channel defining a second airflow path extending toward the element in a second direction, and a third airflow channel defining a third airflow path extending from the element toward an air outlet in a third direction and to convey aerosol, and the first, second, and third directions are different.

Abstract: A fluid permeable heater assembly for an aerosol-generating system includes a cap and a substantially flat electrically conductive and fluid permeable heating element. The cap includes a hollow body with a first cap opening and a second cap opening. The first cap opening is opposite to the second cap opening. The heating element is configured to vaporise aerosol-forming substrate. The heating element is mounted on the cap, such that the heating element extends across the first cap opening. A cartridge for an aerosol-generating system includes the heater assembly, a liquid storage portion, a mouth piece, and a retainer.