E-Cigarette Hot-Wire Temperature Control for Uniform Atomization
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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 for modeling the thermal cycle of an electronic cigarette using temperature monitoring and control, employing a resistor or thermistor to maintain optimal atomization conditions, prevent overheating, and determine e-liquid levels, thereby ensuring consistent smoke production and extended battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If voltage regulation circuit limits output power to extend battery life, then battery life is improved, but smoke volume and heating performance deteriorate
Solution Approach 1:
The system dynamically adjusts voltage output based on real-time temperature feedback from the atomization chamber. When temperature is low, higher voltage is supplied to generate sufficient smoke volume. When temperature reaches optimal levels, voltage is reduced to maintain temperature while conserving battery power. This dynamic adjustment resolves the contradiction between maintaining smoke volume and extending battery life.
Solution Approach 2:
A temperature sensor continuously monitors the atomization chamber temperature and feeds this information back to the voltage regulation circuit. The circuit uses this feedback to automatically adjust its output voltage, ensuring optimal heating performance while preventing excessive power consumption. This closed-loop control system enables the device to maintain adequate smoke production throughout battery discharge cycles.
2Speed
If high initial power output is applied to begin atomization, then atomization speed is improved, but temperature control and battery drainage worsen
Solution Approach 1:
The system applies high power output only periodically during the initial heating phase when the atomization chamber is cold, then transitions to lower power maintenance mode once optimal temperature is reached. This periodic high-power application ensures rapid atomization startup without causing continuous overheating or excessive battery drainage, resolving the contradiction between atomization speed and temperature control.
Solution Approach 2:
The voltage regulation circuit is designed to automatically provide elevated power output during the preliminary heating phase before atomization begins, then seamlessly transition to controlled maintenance power. This preliminary high-power action ensures rapid heating and quick atomization onset, while subsequent power management prevents temperature runaway and optimizes battery usage.
3Stability of the object's composition
If voltage regulation maintains constant voltage throughout smoking cycle, then user experience consistency is improved, but initial heating performance and smoke volume deteriorate
Solution Approach 1:
The voltage regulation system transitions from static constant voltage output to dynamic voltage adjustment based on temperature conditions. During initial heating, higher voltages are applied to ensure adequate smoke production and heating performance. Once optimal temperature is achieved, voltage is stabilized at a lower level to maintain consistent user experience while conserving battery power. This dynamic approach resolves the contradiction between initial heating performance and experience consistency.
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 e-cigarette product life, battery life, and user experience by maintaining uniform smoke volume and temperature from the first puff to the last, preventing burning, and extending the life of the e-liquid and battery.
Implementation Method 1
The device may use heat, ultrasonic energy, or other means to atomize/vaporize a liquid
Implementation Method 2
The coil may be monitored by a sensor, such as a hot wire, that senses the temperature of the coil based on a resistance measurement
Implementation Method 3
The atomization may be similar to nebulizer or humidifier vaporizing solutions for inhalation. The generated mist may be sensed similarly to cigarette smoke.
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.