Aerosol Generating Device with Flow-Controlled Particle Sizing
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Solution Overview
Problem
Electronic cigarettes fail to deliver nicotine effectively to the deep lung due to aerosol particles being too small, resulting in slow absorption and ineffective acute nicotine cravings management, unlike smoked cigarettes which deliver nicotine rapidly.
Innovation Solution
An aerosol generating device with a control apparatus that activates a heater element at a specific air flow rate, producing aerosol particles with a diameter of 1 μm to 5 μm, ensuring deep lung absorption by regulating the air flow rate and particle size, mimicking the pharmacokinetics of smoked cigarettes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If aerosol particles are made small to reach deep lung, then particles can reach deep lung, but absorption is too slow to treat acute nicotine cravings
Solution Approach 1:
The patent changes the particle size parameter from the conventional sub-micron range to 1-5 microns, and adjusts the air flow rate parameter to optimize condensation. This parameter optimization allows particles to be small enough to reach deep lung while large enough to settle in alveoli for rapid absorption, resolving the contradiction between reachability and absorption speed.
Solution Approach 2:
The patent uses periodic pulsing of the heater element synchronized with user inhalation cycles. The heater is activated in pulses to generate aerosol during inhalation phases, creating periodic action that delivers nicotine rapidly during the inhalation window while maintaining overall slower average absorption, thus treating acute cravings effectively.
2Quantity of substance
If air flow rate is increased to deliver more nicotine, then nicotine delivery increases, but aerosol particle size becomes too small for effective deep lung absorption
Solution Approach 1:
The patent dynamically adjusts air flow rate based on real-time detection of user inhalation patterns and aerosol generation conditions. The air flow rate is increased during active inhalation to deliver more nicotine, then reduced between inhalations to allow particle growth to optimal size, dynamically balancing quantity delivery with particle size maintenance.
Solution Approach 2:
The patent pre-heats the liquid formulation before aerosol generation and maintains a controlled thermal environment in the aerosol generation chamber. This preliminary thermal preparation ensures that when high air flow is applied, the liquid is already in optimal state for vaporization, preventing particle size reduction that would normally occur with high flow rates.
3Stability of the object's composition
If heater element is activated continuously to maintain aerosol generation, then nicotine delivery is consistent, but energy consumption increases and particle size control becomes difficult
Solution Approach 1:
The patent implements periodic pulsing of the heater element that synchronizes with detected user inhalation events. The heater is activated only during inhalation phases when aerosol delivery is needed, and remains inactive during exhalation or idle periods. This periodic operation maintains consistent nicotine delivery during use while dramatically reducing overall energy consumption compared to continuous operation.
Solution Approach 2:
The patent uses sensors to detect user inhalation patterns and provides feedback to the control system, which then adjusts heater activation accordingly. When inhalation is detected, the heater is activated to maintain aerosol generation consistency; when no inhalation is detected, the heater is deactivated to save energy. This feedback loop maintains composition stability only when needed.
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
The device achieves rapid nicotine absorption and effective cravings management by generating aerosol particles of optimal size for deep lung delivery, enhancing the nicotine delivery experience similar to smoked cigarettes.
Implementation Method 1
the device is configured to vaporize the liquid formulation upon activation of the heater element
Implementation Method 2
Aerosol particles with a mass median aerodynamic diameter of about 1 μm to about 5 μm can be small enough to reach the deep lung but large enough to gravitationally settle in alveoli
Data Source
AI summary
Provided herein are methods, devices, kits, and systems for modulating aerosol particle size generated by an aerosol generating device (e.g., electronic nicotine delivery device). Also described herein are methods, devices, kits, and systems for modulating the delivery of aerosol particles generated by an aerosol generating device (e.g., an electronic nicotine delivery device) to the deep lung of a subject.