Aerosol Generator PID Control for Temperature-Pressure Balance
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Solution Overview
Problem
Existing aerosol provision systems face challenges in efficiently managing temperature and pressure to prevent overheating, which leads to carbonization and the formation of unwanted chemicals and flavors.
Innovation Solution
A closed-loop control system that monitors temperature and pressure values and adjusts power to the aerosol generator using a PID algorithm, prioritizing measurements of temperature or pressure based on real-time usage to maintain optimal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power is continuously supplied to the aerosol generator, then aerosol generation efficiency is maintained, but the aerosol generator overheats and carbonizes
Solution Approach 1:
The patent implements periodic pulsed heating by controlling the power supply to the aerosol generator in discrete pulses rather than continuous operation. The controller applies power in controlled intervals, allowing the generator to heat up during pulses and cool down between pulses, preventing overheating and carbonization while maintaining aerosol generation efficiency.
Solution Approach 2:
The patent employs feedback control by using temperature and pressure sensors to continuously monitor the aerosol generator's state. The controller receives real-time feedback from these sensors and dynamically adjusts the power supply accordingly, reducing power when temperature or pressure thresholds are approached to prevent overheating and carbonization.
2Reliability
If temperature and pressure monitoring is implemented, then overheating is prevented, but device complexity increases
Solution Approach 1:
The patent implements self-service control where the aerosol generation system automatically monitors its own temperature and pressure conditions and adjusts its operation accordingly. The integrated sensors and controller form a self-regulating system that requires no external intervention, managing thermal and pressure conditions autonomously to prevent overheating.
Solution Approach 2:
The patent combines multiple functions into the controller unit, which integrates power supply control, temperature monitoring, pressure monitoring, and algorithmic decision-making. By merging these functions into a single control unit, the system achieves reliable overheating prevention without proportionally increasing overall device complexity.
3Object-generated harmful factors
If power is reduced to prevent overheating, then carbonization is minimized, but aerosol generation consistency deteriorates
Solution Approach 1:
The patent implements dynamic power adjustment where the controller continuously adapts the power supply level based on real-time temperature and pressure feedback. Rather than using a fixed reduced power level, the system dynamically modulates power to maintain optimal aerosol generation conditions while preventing carbonization, ensuring consistency in aerosol output.
Solution Approach 2:
The patent changes operational parameters (power level, pulse duration, pulse frequency) based on monitored temperature and pressure conditions. The controller adjusts these parameters in real-time to maintain aerosol generation consistency while preventing carbonization and unwanted chemical formation through optimized thermal management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution extends the life of the aerosol generator, reduces overheating, and ensures consistent flavor delivery by maintaining optimal temperature and pressure levels, thereby enhancing consumer value and product performance.
Implementation Method 1
a temperature sensor configured to produce measurements of temperature of one or both of the aerosol generator or the aerosol-generating material
Implementation Method 2
a pressure sensor configured to produce measurements of pressure caused by airflow through the housing
Implementation Method 3
an aerosol generator powered by a power source to generate an aerosol from the aerosol-generating material
Data Source
AI summary
An aerosol provision device includes a housing; a consumable including aerosol-generating material. The aerosol provision device or the consumable includes an aerosol generator to generate an aerosol from the aerosol-generating material. The device includes a pressure sensor, a temperature sensor, and 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 is configured to output a modulated signal with an adjustable duty cycle to cause the high-side load switch to connect and disconnect power to the aerosol generator. The processing circuitry is 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.