Patent No. EP3871527 (titled "Control Unit, Aerosol Generation Device, Method And Program For Controlling Heater, And Smoking Article") was filed by Japan Tobacco, Inc. on Oct 26, 2018. The application was issued on Dec 17, 2025.
A control unit comprises a control part for managing a heater that heats the outer periphery of a smoking article containing an aerosol source. The control part regulates heater temperature across three sequential periods to ensure an aerosol delivery profile—representing the quantity of aerosol inhaled per single suction action over multiple actions—features one or more maximum values between a start point (T2) and end point (T7) of a predetermined suction allowable period. Specifically, the heater is brought to a first target temperature (TA1), then a second target temperature (TA2 < TA1), and finally a third target temperature (TA3 < TA2). To maintain consistent off-period durations, the temperature difference (TA1-TA2) is preferably larger than (TA2-TA3).

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