FIELD: liquid atomisation or spraying devices.
SUBSTANCE: group of inventions relates to an electrically controlled device, to an aerosol generating system and an inductor assembly for use with an electrically controlled device. Electrically controlled aerosol-generating device for heating an aerosol-generating article containing an aerosol-forming substrate, by heating a current collector element arranged to heat the aerosol-forming substrate. Device comprises a housing defining a chamber for accommodating at least a portion of an aerosol-generating article, an inductor comprising an induction coil, located around at least part of the chamber, and a power source connected to the induction coil and configured to provide high-frequency electric current to the induction coil. Induction coil generates a pulsating electromagnetic field for heating the current collector element and thereby heating the aerosol-forming substrate. Inductor further comprises a flow concentrator disposed around the induction coil and configured to distort the pulsating electromagnetic field, generated by induction coil during use, towards the chamber. Concentrator comprises multiple separate segments arranged adjacent to each other. By means of the electromagnetic field distortion towards the chamber, the flow concentrator can concentrate or focus the electromagnetic field inside the chamber, thereby increasing the level of heat generated in a current collector for a given power level passing through the induction coil compared to inductors, in which the flow concentrator is not provided, and the length to which the electromagnetic field extends beyond the inductor is reduced. Flow concentrator acts as an electromagnetic shield, which reduces undesirable heating of the adjacent conductive parts of the device.
EFFECT: higher efficiency of aerosol-generating device due to reduced undesirable heating and losses from induction coil.
16 cl, 10 dwg
