Inductance-Based Cigarette Insertion Detection for Aerosol Heating
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Solution Overview
Problem
Conventional aerosol generating devices require additional user input to heat a heater after a cigarette is inserted, causing inconvenience and delay until the first puff.
Innovation Solution
An aerosol generating device that automatically recognizes the insertion of a cigarette and heats the heater, and stops heating upon detection of cigarette removal, using inductance changes to control the heater's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a capsule-type aerosol generating substance is used, then portability and ease of operation are improved, but accurate detection of insertion and separation becomes difficult
Solution Approach 1:
The patent introduces an inductance sensor as an intermediary detection mechanism between the capsule-type aerosol generating substance and the control system. The sensor detects changes in inductance caused by the insertion and separation of the capsule, converting mechanical movements into electrical signals that can be processed by the control unit to accurately determine insertion and separation states.
Solution Approach 2:
The patent replaces mechanical detection methods (such as physical switches or sensors that directly contact the capsule) with an inductance-based detection system. This substitution allows for non-contact detection of the capsule's presence and movement, improving reliability and eliminating mechanical wear while maintaining ease of operation with capsule-type consumables.
2Productivity
If heater power is increased to ensure complete evaporation, then evaporation completeness is improved, but carbonization and clogging of the aerosol generating device increase
Solution Approach 1:
The patent implements periodic heating cycles instead of continuous high-power heating. The control unit activates the heater in controlled pulses, allowing the aerosol generating substance to evaporate completely during each cycle while providing cooling intervals between cycles. This periodic action prevents thermal accumulation that would otherwise cause carbonization and clogging, while still achieving complete evaporation over the heating periods.
Solution Approach 2:
The patent employs feedback control based on inductance sensor readings to regulate heater power dynamically. The control unit continuously monitors changes in inductance during heating and adjusts heater power in real-time. When the inductance change indicates complete evaporation, the system reduces or stops heating, preventing overheating and carbonization. This feedback mechanism ensures complete evaporation while avoiding excessive temperature rise that would cause harmful carbonization.
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
Improves user convenience by eliminating the need for additional input and reducing the delay to the first puff, while preventing overheating and minimizing power consumption.
Implementation Method 1
determine an insertion and a separation of an aerosol generating substance from the aerosol generating device based on an amount of change in inductance
Implementation Method 2
control a heater to heat the aerosol generating substance based on a result of the determination
Implementation Method 3
heat the aerosol generating substance to generate an aerosol
Data Source
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AI summary
An aerosol generating device that is configured to determine an insertion and a separation of an aerosol generating substance from the aerosol generating device based on an amount of change in inductance and control a heater to heat the aerosol generating substance based on a result of the determination.