公开(公告)号：US10555560B2

公开(公告)日：2020-02-11

申请号：US16421936

申请日：2019-05-24

Applicant: Altria Client Services LLC

Inventor： Stephane Bilat ,  Guillaume Colotte

IPC: A24F13/00 ,  A24F47/00 ,  H05B3/44 ,  H05B1/02

Abstract: An electrically operated aerosol-generating system may be configured to detect adverse conditions (e.g., a dry heater). The system may comprise an electric heater comprising at least one heating element for heating an aerosol-forming substrate, a power supply, and electric circuitry connected to the electric heater and to the power supply and comprising a memory. The electric circuitry may be configured to measure an initial electrical resistance (R1) of the electric heater; measure a subsequent electrical resistance of the electric heater after the measurement of the initial electrical resistance; determine the difference (ΔR) between the initial electrical resistance and the subsequent electrical resistance; determine that an adverse condition is present if the difference is greater than a maximum threshold value (ΔRmax) or less than a minimum threshold value (ΔRmin) stored in the memory; and control a power to the electric heater and/or provide an indication if the adverse condition is present.

公开(公告)号：US20190274361A1

公开(公告)日：2019-09-12

申请号：US16421936

申请日：2019-05-24

Applicant: Altria Client Services LLC

Inventor： Stephane Bilat ,  Guillaume Colotte

IPC: A24F47/00 ,  H05B1/02 ,  H05B3/44

Abstract: An electrically operated aerosol-generating system may be configured to detect adverse conditions (e.g., a dry heater). The system may comprise an electric heater comprising at least one heating element for heating an aerosol-forming substrate, a power supply, and electric circuitry connected to the electric heater and to the power supply and comprising a memory. The electric circuitry may be configured to measure an initial electrical resistance (R1) of the electric heater; measure a subsequent electrical resistance of the electric heater after the measurement of the initial electrical resistance; determine the difference (ΔR) between the initial electrical resistance and the subsequent electrical resistance; determine that an adverse condition is present if the difference is greater than a maximum threshold value (ΔRmax) or less than a minimum threshold value (ΔRmin) stored in the memory; and control a power to the electric heater and/or provide an indication if the adverse condition is present.