E-Cigarette Heating Element Temperature Feedback Control
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Solution Overview
Problem
Electronic cigarettes face issues with excessive heating of the heating element, leading to the production of harmful substances, as the temperature control systems fail to maintain the heating element within a safe range, resulting in overheating and potential health risks.
Innovation Solution
An electronic cigarette temperature control system comprising a power supply, a heating element, temperature detection elements, and a processor that adjusts the output voltage or power based on detected temperature thresholds, using various sensors like PTC thermistors and thermostatic switches to maintain the heating element within a controlled temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the output voltage or output power of the battery assembly is increased, then the heating effect of the heating member is improved, but the temperature of the heating member becomes excessively high leading to harmful substance production
Solution Approach 1:
The patent implements a temperature feedback control system where a temperature detection element (such as a thermistor or thermocouple) continuously monitors the temperature of the heating member and sends signals to a control circuit. The control circuit adjusts the output power of the battery assembly based on the detected temperature, reducing power when temperature approaches the threshold and increasing power when temperature drops, thereby maintaining temperature within a safe range while ensuring effective heating
Solution Approach 2:
The patent changes the electrical parameters (output voltage and output power) of the battery assembly dynamically based on temperature conditions. By adjusting these parameters in response to temperature feedback, the system achieves effective heating without exceeding safe temperature thresholds that would produce harmful substances
2Use of energy by moving object
If the resistance of the heating member is decreased, then the heating efficiency is improved, but the temperature control precision deteriorates
Solution Approach 1:
The temperature detection element provides continuous feedback on the actual temperature of the heating member, allowing the control circuit to make precise adjustments to the output power. This feedback mechanism compensates for the reduced temperature control precision that would otherwise result from using low-resistance heating members for efficient heating
Solution Approach 2:
The patent replaces simple mechanical or passive heating control with an electronic control system that uses electrical signals from temperature detection elements to regulate power output. This electronic substitution enables precise temperature control even when using heating members with low resistance for high heating efficiency
3Reliability
If temperature detection elements and control circuits are added, then temperature control capability is improved, but the device complexity increases
Solution Approach 1:
The control circuit automatically regulates the heating process based on temperature feedback without requiring user intervention. The system self-adjusts the power output by detecting temperature changes and modifying electrical parameters accordingly, providing reliable temperature control while keeping the operation simple for the user
Solution Approach 2:
The patent integrates the temperature detection element and control circuit into the existing electronic cigarette structure, combining multiple functions (heating, temperature detection, and power control) into a unified system. This merging approach improves temperature control capability while minimizing the increase in overall device complexity by sharing common components and circuitry
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 system effectively maintains the heating element at a reasonable temperature, preventing the production of harmful substances, saving energy, and prolonging the device's lifespan by avoiding overheating and thermal aging.
Implementation Method 1
The heating element can have temperature coefficient of resistance characteristics. The processor can determine the temperature T of the heating element according to the resistance value RL of the heating element.
Implementation Method 2
The at least one temperature detection element can be selected from one of a group consisting of a positive temperature coefficient (PTC) thermistor, a negative temperature coefficient (NTC) thermistor, a bimetallic strip, a thermocouple, a quartz crystal temperature sensor, an optical fiber temperature sensor, an infrared temperature sensor, a P-N junction temperature sensor, and any combination thereof.
Implementation Method 3
with increasing of the output voltage or output power of a battery assembly of the electronic cigarette and decreasing of the resistance of a heating member of the atomizing device, the temperature of the heating member becomes higher
Implementation Method 4
The processor can be configured to determine the temperature t of the at least one temperature detection element according to an associated physical quantity x of the at least one temperature detection element, and calculate the temperature T of the heating element according to the temperature t of the at least one temperature detection element. The processor can compare the temperature T of the heating element with an upper threshold of an operating temperature TH of the heating element and a lower threshold of the operating temperature TL of the heating element as the basis of a calculation, and control the output voltage/the output power from the power supply to the heating element accordingly.
Data Source
AI summary
An electronic cigarette includes a processor, a heating element, and a power supply. The heating element is electrically coupled to the processor. The power supply is electrically coupled to the processor and the heating element. The processor is configured to calculate a resistance value RL of the heating element before the heating element is powered on, determine whether the resistance value RL of the heating element is within a predetermined range, and determine whether a temperature control mode is selected when the resistance value RL of the heating element is within the predetermined range. The processor is configured to determine whether the heating element is adapted to the temperature control mode when the temperature control mode is selected, and control the heating element to work in the temperature control mode when the heating element is adapted to the temperature control mode. A related temperature control method is also provided.