US 12,250,973 B2
Closed-loop control of temperature and pressure sensing for an aerosol provision device
Sky Carman, Clemmons, NC (US)
Assigned to RAI Strategic Holdings, Inc., Winston-Salem, NC (US)
Filed by RAI Strategic Holdings, Inc., Winston-Salem, NC (US)
Filed on Dec. 21, 2023, as Appl. No. 18/393,034.
Application 18/393,034 is a continuation of application No. 17/099,178, filed on Nov. 16, 2020, granted, now 11,889,869.
Prior Publication US 2024/0122259 A1, Apr. 18, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A24F 40/51 (2020.01); A24F 40/42 (2020.01); A24F 40/57 (2020.01); G05B 19/18 (2006.01); A61M 15/06 (2006.01)
CPC A24F 40/51 (2020.01) [A24F 40/42 (2020.01); A24F 40/57 (2020.01); G05B 19/18 (2013.01); A61M 15/06 (2013.01); G05B 2219/42033 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An aerosol provision device comprising:
a housing;
a consumable including aerosol-generating material, the aerosol provision device or the consumable further including an aerosol generator powered by a power source to generate an aerosol from the aerosol-generating material;
a pressure sensor configured to produce measurements of pressure caused by airflow through the housing;
a temperature sensor configured to produce measurements of temperature of one or both of the aerosol generator or the aerosol-generating material;
a high-side load switch coupled to or coupleable with the aerosol generator; and
processing circuitry coupled to the high-side load switch, the pressure sensor, and the temperature sensor, the processing circuitry configured to output a signal to cause the high-side load switch to switchably connect and disconnect power from the power source to the aerosol generator, the signal being a modulated signal with an adjustable duty cycle, and the processing circuitry being configured to implement a proportional-integral-derivative (PID) algorithm to adjust the duty cycle based on the processing circuitry determining whether the measurements of temperature or the measurements of pressure take precedence for implementing the PID algorithm to adjust the duty cycle.