E-Cigarette Hot-Wire Temperature Control to Prevent Wick Burning
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Solution Overview
Problem
Electronic cigarettes face challenges in temperature management, leading to inconsistent smoke volume and quality due to difficulties in regulating heat, which results in an unpleasant user experience and reduced battery life.
Innovation Solution
A system and method that models the thermal cycle of an electronic cigarette using temperature monitoring and control, employing a resistor or thermistor to optimize atomization and prevent overheating, ensuring consistent smoke generation and extended battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high power output is used to begin atomization, then atomization process starts rapidly, but temperature rises too quickly causing overheating and burning
Solution Approach 1:
The patent implements periodic heating cycles with distinct phases: an initial high-power phase to rapidly heat the heating element for quick atomization, followed by a reduced-power phase to maintain temperature without overheating. This periodic action allows the system to achieve rapid atomization startup while preventing temperature from rising too quickly and causing burning.
2Duration of action of moving object
If voltage is regulated to conserve battery energy, then battery life is extended, but smoke volume is insufficient especially in initial puffs
Solution Approach 1:
The patent applies preliminary action by delivering a higher power output during initial puffs to adequately heat the heating element and generate sufficient smoke volume. After the heating element reaches optimal temperature, the system transitions to voltage regulation mode to conserve battery energy. This preliminary high-power action ensures good smoke production at the start while still extending battery life during sustained use.
3Stability of the object's composition
If constant voltage is delivered throughout the smoking cycle, then uniform smoke quality is maintained, but energy consumption increases reducing battery life
Solution Approach 1:
The patent implements dynamic voltage control that adjusts the voltage delivered to the heating element based on real-time temperature feedback from the temperature sensor. The system transitions from a static constant voltage approach to a dynamic control strategy where voltage is modulated to maintain optimal atomization temperature. This dynamic adjustment maintains uniform smoke quality by preventing temperature fluctuations while reducing energy consumption by avoiding unnecessary high-power delivery when the heating element is already at optimal temperature.
4Productivity
If heating element operates at high temperature, then atomization efficiency is high, but burning occurs when liquid is depleted
Solution Approach 1:
The patent implements a feedback control system where a temperature sensor continuously monitors the temperature of the heating element and provides real-time feedback to the control circuit. Based on this feedback, the control circuit adjusts the power delivery to the heating element to maintain optimal atomization temperature. When the liquid is depleted and the heating element temperature rises above the optimal range, the feedback mechanism detects this temperature increase and reduces or stops power delivery, preventing burning and the associated unpleasant smell.
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 solution provides a dynamic power control system that balances product and battery life, offering a uniform vaping experience from the first puff to the last, while preventing burning and conserving energy.
Implementation Method 1
The coil may be made of any material that converts electrical energy to heat
Implementation Method 2
Temperature sensing through the coil's resistance
Implementation Method 3
The atomization of the liquid requires heating which may be difficult to regulate
Implementation Method 4
The atomization process may be referred to as vaporization although vaporization may just be a secondary effect of the atomization
Data Source
AI summary
An electronic cigarette (“e-Cig”) may include functionality for monitoring and controlling the thermal properties of the e-Cig. The system and method described herein may monitor a temperature based on a resistor (i.e. hot wire) near the wick and model the thermal cycle of an e-Cig. The model can be used for controlling the temperature of the e-Cig and preventing burning. The temperature control may dictate optimal conditions for atomization and smoke generation in an e-Cig while avoiding hotspots and burning to the atomizer or cartomizer.