Aerosol Heater PID Switching for Fast and Stable Temperature Control
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Solution Overview
Problem
Existing aerosol generation systems, such as those used in inhaler devices, face limitations in delivering optimal smoke taste due to inefficiencies in temperature control during the aerosol production process.
Innovation Solution
An aerosol generation system that employs a PID control mechanism to adjust electric power supply to a heater, switching parameters based on time elapsed and temperature transitions, with distinct periods for heating and voltage application to optimize temperature control and flavor delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a PID control system is used to control heater temperature, then temperature control stability is improved, but response speed during temperature changes is insufficient
Solution Approach 1:
The patent applies dynamic PID control by switching between different PID parameters (Kp, Ki, Kd) based on the current temperature state. During temperature rising phase, a first set of PID parameters is used to enable rapid response. During temperature maintenance phase, a second set of PID parameters is used to ensure stability. This dynamic adjustment of control parameters allows the system to achieve both fast response and stable control.
Solution Approach 2:
The temperature control process is segmented into distinct phases: temperature rising phase and temperature maintenance phase. Each phase uses optimized PID parameters tailored to its specific requirements. The rising phase prioritizes speed with higher proportional gain, while the maintenance phase prioritizes stability with adjusted integral and derivative gains. This segmentation allows the system to optimize performance for each operational stage independently.
2Speed
If heating power is increased to reach target temperature quickly, then heating speed is improved, but temperature overshoot and instability increase
Solution Approach 1:
The system dynamically adjusts the PID parameters based on the heating stage. During the rising phase, the proportional gain Kp is set to a first value that enables fast heating response. When the target temperature is approached and maintenance begins, Kp switches to a second value that prevents overshoot and ensures stability. This dynamic parameter switching allows the system to achieve both rapid heating and stable temperature maintenance without excessive overshoot.
3Device complexity
If PID parameters are kept constant, then control simplicity is maintained, but adaptability to different temperature phases is reduced
Solution Approach 1:
The control system transitions from static PID parameters to dynamic PID parameters that automatically switch based on temperature phase. The controller monitors the temperature state and switches between first PID parameters (for rising phase) and second PID parameters (for maintenance phase). This dynamic adaptation enhances the system's ability to handle different operational conditions while maintaining automated control without requiring manual intervention.
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 approach enhances the quality of smoke taste by precisely controlling temperature profiles, ensuring rapid heating, maintaining optimal temperatures, and reducing power consumption, thereby improving user experience.
Implementation Method 1
a heater (121) configured to heat an aerosol source by using electric power supplied from the power supply (111)
Data Source
AI summary
An aerosol generation system including: a power supply unit; a heating unit that heats an aerosol source using power supplied from the power supply unit; and a control unit that controls the power supply from the power supply unit to the heating unit by PID control based on control information for controlling the temperature at which the aerosol source is heated, wherein the control unit controls the power supply from the power supply unit to the heating unit while switching parameters applied to the PID control in accordance with the elapsed time since the start of the control based on the control information or the transition of the temperature at which the aerosol source is heated.