Aerosol Heater Power Control Using Capacitance-Based Cleaning Detection
Solution Overview
Problem
Users face challenges in determining the appropriate timing for cleaning aerosol generating devices using the heat-cleaning method, leading to potential degradation in performance due to the subjective nature of the process and lack of consideration for the amount of foreign substances inside the device.
Innovation Solution
An aerosol generating device equipped with a sensor to detect changes in capacitance, generating a sensing signal that triggers the processor to supply power to the heater for cleaning when the signal falls within a preset range, ensuring automatic heat-cleaning based on the presence of foreign substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If heat-cleaning is performed based on user's subjective judgment or mounting on charging device, then cleaning operation is simple, but cleaning timing is inaccurate and performance degradation occurs
Solution Approach 1:
The patent replaces the mechanical/manual cleaning trigger system with an electrical sensing system. A sensor detects the presence of foreign substances (capacitance change) and automatically triggers the cleaning process, substituting user subjective judgment with objective electrical measurement. This resolves the contradiction by maintaining simple operation while achieving precise cleaning timing detection.
Solution Approach 2:
The patent implements a feedback mechanism where the sensor continuously monitors the accommodation space for foreign substances, and the processor uses this feedback information to automatically initiate cleaning when thresholds are exceeded. This closed-loop feedback system ensures accurate cleaning timing without requiring user intervention or complex mechanical triggers.
2Reliability
If heat-cleaning is performed frequently to prevent performance degradation, then cleaning effectiveness is improved, but power consumption increases
Solution Approach 1:
The patent performs preliminary detection of foreign substances using the sensor before cleaning is actually needed. By detecting the presence and amount of foreign substances in advance, the system can schedule cleaning only when necessary, preventing performance degradation before it occurs while avoiding unnecessary cleaning cycles that would waste power.
Solution Approach 2:
The patent uses parameter changes (capacitance value changes) as an indicator for cleaning needs. By monitoring the capacitance parameter and comparing it against threshold values, the system dynamically determines when cleaning is required, optimizing the balance between maintaining device performance and minimizing power consumption through data-driven decision making.
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 prevents performance degradation by ensuring timely and automatic heat-cleaning, saving power, and reducing the time required for cleaning, while maintaining user satisfaction by minimizing burnt taste and aerosol reduction.
Implementation Method 1
a sensor configured to generate a sensing signal corresponding to a change in capacitance of an accommodation space into which the aerosol generating article is inserted
Implementation Method 2
a heater configured to heat at least a portion of an aerosol generating article
Implementation Method 3
the foreign substances adhered to a heater may be removed by heating the heater to a high temperature
Data Source
AI summary
An aerosol generating device may include a heater configured to heat an aerosol generating article, a sensor configured to generate a sensing signal corresponding to a change in capacitance of an accommodation space into which the aerosol generating article is inserted, and a processor electrically connected to the heater and the sensor, wherein the processor may be further configured to detect whether the sensing signal obtained from the sensor falls within a preset range, and supply first power to the heater based on the sensing signal being within the preset range.