Heating control arrangement for an electronic smoking article and associated system and method
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Solution Overview
Problem
Existing smoking devices that use electrical energy to simulate the sensations of cigarette, cigar, or pipe smoking often produce incomplete combustion and pyrolysis products, and lack efficient control over heat delivery to vaporize aerosol precursors without significant combustion.
Innovation Solution
A method and apparatus for controlling the heating of an aerosol precursor arrangement in an electronic smoking article, where a processor adjusts the power directed to a heating device to maintain a selected power set point, ensuring efficient vaporization of aerosol precursors without significant combustion, by continuously monitoring and adjusting the actual power as a product of voltage and current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electrical energy is used to vaporize aerosol precursors in smoking devices, then the sensations of cigarette smoking can be provided without combusting tobacco, but incomplete combustion and pyrolysis products are still delivered in considerable quantities
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the actual power delivered to the heating device by measuring voltage and current, compares it to the average power, and adjusts the power delivery to maintain it at the selected set point. This closed-loop feedback mechanism ensures precise control over heat delivery, preventing temperatures that would cause combustion or pyrolysis while maintaining efficient vaporization of aerosol precursors.
Solution Approach 2:
The patent dynamically adjusts the power delivery parameters (voltage and current) to the heating device based on real-time measurements and control algorithms. By changing these electrical parameters in response to actual power measurements, the system maintains optimal heating conditions for vaporization without reaching combustion temperatures, thereby eliminating harmful combustion products while preserving the desired smoking sensation.
2Reliability
If power delivery to heating device is not precisely controlled, then combustion may occur, but efficient vaporization of aerosol precursors cannot be achieved
Solution Approach 1:
The feedback control system continuously monitors actual power delivery by measuring voltage across and current through the heating device, compares measured power to the selected average power set point, and adjusts power delivery in real-time. This ensures reliable prevention of combustion while maintaining optimal conditions for efficient aerosol precursor vaporization, resolving the contradiction between safety and efficiency.
Solution Approach 2:
The patent replaces traditional mechanical or manual power control mechanisms with an electronic feedback control system that uses voltage and current sensing, processing circuitry, and automated adjustment. This substitution enables precise, dynamic control of power delivery that is more reliable and efficient than mechanical systems, allowing the heating device to operate consistently in the optimal range for vaporization without combustion.
3Temperature
If combustion heat sources are used to vaporize aerosol precursors, then high temperature vaporization is achieved, but the need for combustion heat sources is eliminated in favor of electrical energy
Solution Approach 1:
The patent substitutes combustion heat sources with an electrical heating device powered by a battery or power source. The electrical heating element can reach the necessary vaporization temperatures without combustion, and the associated power control system with voltage and current sensing provides precise temperature management, eliminating the need for combustion while maintaining effective vaporization.
Solution Approach 2:
The patent controls the electrical parameters (voltage and current) supplied to the heating device to achieve and maintain the optimal temperature range for vaporization. By dynamically adjusting these electrical parameters based on feedback from power measurements, the system achieves the required vaporization temperature through electrical heating alone, eliminating combustion while maintaining effective aerosol generation.
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 approach allows for precise control of heat delivery, reducing the formation of incomplete combustion products and providing a consistent inhalable aerosol, mimicking the smoking experience without the need for combustion heat sources.
Implementation Method 1
heating device arranged to heat the aerosol precursor arrangement
Data Source
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AI summary
A method is provided for controlling heating of an aerosol precursor arrangement of an electronic smoking article. An average power is directed from a power source to a heating device arranged to heat the aerosol precursor arrangement and a heating time period commensurately initiated. The average power corresponds to a selected power set point associated with the power source. An actual power directed to the heating device is determined as a product of a voltage at, and a current through, the heating device. The actual power is compared to the average power, and the average power is adjusted to direct the actual power toward the selected power set point. The actual power is periodically determined and compared to the average power, and the average power adjusted toward the selected power set point, until expiration of the heating time period. An associated apparatus and computer program product are also provided.