Aerosol Heater Control Using Resistance-Based Target Temperature
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Solution Overview
Problem
Aerosol-generating devices face issues with inconsistent heater temperature control due to variations in cartridge resistance values, leading to inaccurate power supply and temperature regulation.
Innovation Solution
The device includes a controller that determines the target temperature of the heater based on the temperature reached, using a PID method to control power supply, and disables the cartridge if the temperature exceeds a reference range, with measures to the resistance value, and determines the temperature of the heater based on a first puff or cartridge replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional power supply control is used without considering cartridge deviation, then the device structure remains simple, but the heater temperature cannot be accurately controlled to the desired temperature
Solution Approach 1:
The system performs preliminary measurement of the heater's initial temperature and resistance value before power supply control. Based on these preliminary measurements, the controller determines appropriate target temperature and power control parameters, ensuring accurate temperature control while adapting to cartridge variations without requiring complex real-time adjustment mechanisms
Solution Approach 2:
The controller continuously monitors the heater temperature and resistance value, using this feedback information to adjust the power supply control. The system compares actual temperature readings with target temperature and modifies power delivery accordingly, achieving precise temperature control through dynamic feedback adjustment
2Measurement precision
If the target temperature is determined without considering initial temperature changes, then the control process is simple, but the temperature control accuracy deteriorates when cartridge resistance values vary
Solution Approach 1:
The system measures the heater's initial temperature and resistance value before determining the target temperature. Based on these preliminary measurements and the relationship between resistance and temperature, the controller calculates an appropriate target temperature that accounts for cartridge variations, ensuring accurate temperature control without requiring complex real-time adjustment mechanisms
Solution Approach 2:
The system adjusts the target temperature parameter based on the measured initial temperature and resistance value. When resistance values vary between cartridges, the target temperature is dynamically adjusted to compensate for these variations, maintaining consistent heating performance across different cartridges
3Reliability
If power is supplied without PID control, then the power supply system is simple, but the temperature control stability and consistency are poor
Solution Approach 1:
The controller implements PID control by continuously monitoring the heater temperature and comparing it with the target temperature. Based on the temperature difference and its rate of change, the controller dynamically adjusts the power supply to the heater, ensuring stable and consistent temperature control while compensating for disturbances and maintaining reliable operation
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
Accurate temperature control is achieved by determining the target temperature of the heater, ensuring consistent power supply and preventing overheating or underheating, thereby stabilizing device operation.
Implementation Method 1
a heater (24) configured to heat an aerosol-generating substance
Data Source
AI summary
Disclosed is an aerosol-generating device. The aerosol-generating device includes a body, a cartridge separably coupled to the body, the cartridge including a heater configured to heat an aerosol-generating substance, a power supply configured to supply power to the heater, and a controller configured to control the power supply to supply a preset power to the heater, determine the temperature of the heater while the preset power is supplied to the heater, and determine a target temperature for controlling the power supplied to the heater based on the temperature reached by the heater.