INDUCTIVE HEATING DEVICE, AEROSOL-DELIVERY SYSTEM COMPRISING AN INDUCTIVE HEATING DEVICE, AND METHOD OF OPERATING SAME

摘要

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).

主权项

1. Inductive heating device for heating an aerosol-forming substrate comprising a susceptor, the inductive heating device comprising:
a device housing a DC power source for in operation providing a DC supply voltage (VDC) and a DC current, a power supply electronics configured to operate at high frequency, the power supply electronics comprising a DC/AC converter connected to the DC power source, the DC/AC converter comprising an LC load network configured to operate at low ohmic load, wherein the LC load network comprises a series connection of a capacitor and an inductor having an ohmic resistance, a cavity arranged in the device housing, the cavity having an internal surface shaped to accommodate at least a portion of the aerosol-forming substrate, the cavity being arranged such that upon accommodation of the portion of the aerosol-forming substrate in the cavity the inductor of the LC load network is inductively coupled to the susceptor of the aerosol-forming substrate during operation,wherein the power supply electronics further comprises a microcontroller programmed to in operation determine from the DC supply voltage of the DC power source and from the DC current drawn from the DC power source an apparent ohmic resistance, and further programmed to in operation determine from the apparent ohmic resistance the temperature of the susceptor of the aerosol-forming substrate.