Induction-Heated Aerosol Assembly for Rapid, Controlled Heating
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Solution Overview
Problem
Existing smoking alternatives that heat tobacco without burning it do not efficiently replicate the aerosol characteristics of traditional cigarettes, and there is a need for rapid and controlled heating to produce a comparable aerosol.
Innovation Solution
An aerosol generating assembly using an induction heater with a coil to heat a cylindrical rod of aerosol generating material, allowing for rapid and controlled heating, which includes features like independent heating zones and selectable heat profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional heating methods are used to heat tobacco material, then the device structure is simple, but the heating speed is slow and aerosol characteristics are poor
Solution Approach 1:
The patent replaces traditional thermal conduction heating mechanisms with electromagnetic induction heating. The induction coil generates an alternating magnetic field that induces eddy currents in the aerosol generating material, converting electromagnetic energy directly into heat within the material itself. This substitution enables rapid heating (achieving operational temperature in seconds) while maintaining a relatively simple device structure consisting primarily of the coil, power source, and control circuitry.
Solution Approach 2:
The induction heating system operates by applying periodic alternating current to the coil, creating a time-varying magnetic field that penetrates the aerosol generating material. This periodic electromagnetic action induces continuous eddy currents within the material, generating heat rapidly and controllably. The periodic nature of the induction heating allows for precise control of heating profiles and rapid response to user activation.
2Reliability
If heating temperature is increased to improve aerosol generation, then aerosol characteristics improve, but risk of burning the material increases
Solution Approach 1:
The patent incorporates temperature sensing and control circuitry that continuously monitors the heating process and provides feedback to the power source. This feedback mechanism allows the system to maintain the heating element at optimal temperatures for aerosol generation without exceeding thresholds that would cause combustion. The control system adjusts power delivery in real-time based on temperature conditions, ensuring reliable aerosol production while preventing burning.
Solution Approach 2:
The induction heating system enables precise control of heating parameters including temperature, heating rate, and duration. By independently controlling these parameters, the system can achieve the specific temperature range required for efficient aerosol generation (typically 200-400°C) without reaching combustion temperatures. The ability to modulate power delivery and heating profiles allows optimization of aerosol characteristics while maintaining safety margins below burning points.
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 assembly produces an aerosol with characteristics similar to factory-made cigarettes, achieving rapid heating times and controlled temperature profiles, enhancing the sensory experience.
Implementation Method 1
The coil can comprise an induction coil and the aerosol generating device can comprise an induction heater
Implementation Method 2
the aerosol generating material is heatable by the aerosol generating device
Data Source
AI summary
An aerosol generating assembly includes an aerosol generating device having a coil and an aerosol generating article. The aerosol generating article has a substantially cylindrical rod of aerosol generating material of between about 10 mm and about 100 mm in length, and the article and device are arranged with respect to each other such that the aerosol generating material is heatable by the device. The aerosol generating material can have at least 1.1 mg of nicotine and/or at least about 17 mg of aerosol generating agent.