Aerosol Heater Interval Control for Fast Warm-Up and Stable Temperature
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional aerosol generating devices take a long time to heat up, consuming significant battery power and delaying user access to aerosol inhalation due to inefficient temperature control methods.
Innovation Solution
The aerosol generating device employs a controller that divides the heating process into sections, using PWM control for rapid pre-heating and PID control for maintaining temperature, with a control reference ratio calculated based on the durations of these sections to optimize power supply to the heater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If PID control is used to control heater temperature, then temperature stability is improved, but heating time increases and battery power consumption increases
Solution Approach 1:
The heating process is divided into multiple temperature intervals (first interval from room temperature to first target temperature, second interval from first target temperature to second target temperature, third interval from second target temperature to third target temperature). Different control strategies are applied to each interval to optimize both heating speed and temperature stability.
Solution Approach 2:
The control method dynamically adjusts the heating power and control parameters based on the current temperature interval. The proportional gain and integral gain are adjusted according to the temperature range, allowing faster response at lower temperatures and more stable control at higher temperatures.
2Stability of the object's composition
If PID control is used to control heater temperature, then temperature stability is improved, but battery power consumption increases
Solution Approach 1:
The heating process is divided into multiple temperature intervals with different power consumption characteristics. By segmenting the control process, the system can use higher power when needed and reduce power when approaching target temperatures, optimizing overall energy usage while maintaining stability.
Solution Approach 2:
The control parameters (proportional gain, integral gain, derivative gain) are changed based on the temperature interval. This allows the system to adapt its energy consumption profile to the current heating stage, reducing unnecessary power consumption while maintaining temperature stability.
3Speed
If heating power is increased to reduce heating time, then heating speed is improved, but temperature overshoot occurs
Solution Approach 1:
The heating process is segmented into multiple intervals with progressively higher target temperatures. This allows the system to build up heat gradually, preventing sudden large temperature jumps that would cause overshoot, while still maintaining overall fast heating performance.
Solution Approach 2:
The control system dynamically adjusts the proportional gain based on the temperature interval. In earlier intervals, higher gain enables faster heating, while in later intervals, adjusted gain prevents overshoot as the system approaches the final target temperature.
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 allows for quick aerosol generation without prolonged waiting times, reducing battery power consumption and preventing overheating, thereby enhancing the user experience.
Implementation Method 1
a heater configured to generate an aerosol by heating an aerosol generating substance
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Provided is an aerosol generating device including a heater configured to generate an aerosol by heating an aerosol generating substance; and a controller configured to control power supplied to the heater, wherein the controller distinguishes a first section, a second section, and a third section and controls power supplied to the heater, and calculates a control reference ratio by using at least two from among the first section, the second section, and the third section and controls power supplied to the heater based on the calculated control reference ratio.