Abstract: An apparatus for a non-combustible aerosol provision device can include an induction circuit including an induction element for inductively heating a susceptor arrangement arranged to heat an aerosol-generating material to thereby generate an aerosol; drive circuitry arranged to provide, from an input direct current, a varying voltage across the induction circuit for driving the induction element to inductively heat the susceptor arrangement; and control circuitry. The control circuitry is configured to cause the drive circuitry to selectively operate: in a first mode in which the drive circuitry repeatedly alternates a polarity of the voltage provided across the induction circuit; and in a second mode in which the drive circuitry repeatedly alternates between providing a first voltage of non-zero magnitude across the induction circuit and providing substantially no voltage across the induction circuit.

Abstract: Disclosed herein is an assembly for an aerosol provision device for heating aerosol-generating material to volatilize at least one component of the aerosol-generating material. The assembly can include a heating zone for receiving aerosol-generating material to be heated, a structure, and at least one continuous electrically conductive path supported by the structure and configured to perform a first function of detecting temperature of the heating zone on the basis of an electrical resistance of the at least one path and/or a second function of heating the heating zone by resistance heating. The at least one path extends along at least two distinct portions of the structure. The at least one path can include a multiplicity of turns within each of the at least two distinct portions of the structure. The at least two distinct portions of the structure are offset from each other by a gap which is substantially free of the at least one path.

Abstract: An aerosol provision device is provided. The device defines a longitudinal axis, and comprises a first coil and a second coil. The first coil is configured to heat a first section of a heater component, the heater component being configured to heat aerosol generating material to generate an aerosol. The second coil is configured to heat a second section of the heater component. The first coil has a first length along the longitudinal axis and the second coil has a second length along the longitudinal axis, the first length being shorter than the second length. The first coil is adjacent the second coil in a direction along the longitudinal axis. In use, the aerosol is drawn along a flow path of the device towards a proximal end of the device, and the first coil is arranged closer to the proximal end of the device than the second coil.

Abstract: Aerosol provision devices having printed circuit boards are described. One such aerosol provision device defines a longitudinal axis and comprises an electrical connector, a heater assembly configured to heat aerosol generating material received within the device and a printed circuit board (PCB). The PCB comprises a first portion arranged substantially parallel to the longitudinal axis and a second portion arranged substantially perpendicular to the longitudinal axis. The heater assembly is electrically coupled to the first portion. The second portion is electrically coupled to the first portion and the electrical connector is electrically coupled to the second portion. Another such aerosol provision device comprises a first coil for heating a heater component and a PCB arranged adjacent to the first coil. The PCB comprises: a first through hole connected to a first end of the first coil; and a second through hole connected to a second end of the first coil.

Abstract: Apparatus for an aerosol generating system comprises an inductive element for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol, an insulating member which in use is located between the inductive element and the susceptor arrangement to thermally insulate the susceptor arrangement from the inductive element; a temperature sensor for measuring a temperature at a location in the system insulated in use from the susceptor arrangement by the insulating member, and a control arrangement. The control arrangement is configured to monitor the temperature measured by the temperature sensor and take a control action if, based on the temperature measured by the temperature sensor, the control arrangement determines that the susceptor arrangement is overheating.

Abstract: An apparatus for an aerosol generating device is described. The apparatus includes an induction heating circuit including an inductive element for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol, a capacitive element, and a switching arrangement that in use alternates between a first state and a second state to enable a varying current to be generated from a DC voltage supply and flow through the inductive element to cause inductive heating of the susceptor arrangement. The circuit also includes a control arrangement configured to switch the switching arrangement from the first state to the second state in response to a first voltage condition being detected in the circuit, and to switch the switching arrangement from the second state to the first state in response to a second voltage condition being detected in the circuit.

Abstract: An aerosol provision device is provided. The device defines a longitudinal axis, and comprises a first coil and a second coil. The first coil is configured to heat a first section of a heater component, the heater component being configured to heat aerosol generating material to generate an aerosol. The second coil is configured to heat a second section of the heater component. The first coil has a first length along the longitudinal axis and the second coil has a second length along the longitudinal axis, the first length being shorter than the second length. The first coil is adjacent the second coil in a direction along the longitudinal axis. In use, the aerosol is drawn along a flow path of the device towards a proximal end of the device, and the first coil is arranged closer to the proximal end of the device than the second coil.

Abstract: An aerosol provision device is provided. The device comprises a plurality of electrical components, a heating assembly comprising a heater component for heating aerosol generating material, and a battery to power the plurality of electrical components and the heating assembly. In use, the power consumption of the plurality of electrical components is less than about 0.25 W.

Abstract: An aerosol generating device includes an induction heating circuit for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol. The device is configured such that during operation a level of electromagnetic radiation emitted by the device is: less than 40 dB?V/m over a frequency range of 30 MHz to 225 MHz and/or less than 47 dB?V/m over a frequency range of 235 MHz to 1 GHz, and/or less than 70 dB?V/m over a frequency range of 1 GHz to 3 GHz, and/or less than 74 dB?V/m over a frequency range of 3 GHz to 6 GHz.

Abstract: An aerosol provision device comprises an inductor coil configured to generate the varying magnetic field for heating the susceptor arrangement. The inductor coil is helical, formed from litz wire and comprises between about 25 and about 350 wire strands.

Abstract: Various configurations of heater components for aerosol provision devices are disclosed. One heater component is configured to receive aerosol generating material and has a longitudinal axis. The heater component has a first length along the longitudinal axis, the aerosol generating material has a second length along the longitudinal axis, and a ratio of the first length to the second length is between about 1.03 and about 1.25. Another heater component has a mass of between about 0.1g and about 1g. A further heater component comprises an alloy comprising at least 99 wt % Iron. A yet further heater component comprises carbon steel. A still further heater component defines a longitudinal axis and has a wall thickness, measured in a direction perpendicular to the longitudinal axis, of between about 0.025 mm and about 2 mm.

Abstract: An aerosol provision device is provided. The device comprises a receptacle configured to receive aerosol generating material, wherein the aerosol generating material is heatable by a susceptor. The device further comprises an inductor coil extending around the receptacle, wherein the inductor coil is configured to generate a varying magnetic field for heating the susceptor. The device further comprises a magnetic shield member extending at least partially around the inductor coil.

Abstract: Described herein is an aerosol-generating device for generating aerosol from an aerosol-generating material. The aerosol-generating device comprises a heating assembly having a mouth end and a distal end. The heating assembly comprises: a first induction heating unit arranged to heat, but not burn, the aerosol-generating material in use; a second induction heating unit arranged to heat, but not burn, the aerosol-generating material in use, the first induction heating unit being disposed closer to the mouth end of the heating assembly than the second induction heating unit; and a controller for controlling the first and second induction heating units. The heating assembly is configured such that at least one induction heating unit reaches a maximum operating temperature within 20 seconds of supplying power to the at least one induction heating unit.

Abstract: A resonant circuit for an aerosol generating system includes an inductive element for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol. The circuit also includes a switching arrangement that, in use, alternates between a first state and a second state to enable a varying current to be generated from a DC voltage supply and flow through the inductive element to cause inductive heating of the susceptor arrangement. The switching arrangement is configured to alternate between the first state and the second state in response to voltage oscillations within the resonant circuit which operate at a resonant frequency of the resonant circuit, whereby the varying current is maintained at the resonant frequency of the resonant circuit.

Abstract: The present invention provides devices and methods for micro-scale simulated moving bed chromatography (SMB) for continuous preparation of analytic quantities of highly pure fractions of target molecules. The present apparatus and method of the invention is adapted in a preferred embodiment to separations by affinity chromatography involving three discontinuous liquid flow loops. An alternative embodiment of affinity chromatography utilizes standard SMB operating under isocratic conditions.