Thermo-Sensitive Heating Coil Temperature Control Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic cigarettes lack effective temperature control, leading to dry burning and overheating when e-liquid is depleted, causing device failure and potential health hazards due to the inhalation of harmful gases.
Innovation Solution
An electronic cigarette with a thermo-sensitive heating unit and leads, coupled with a power supply managing module that continuously monitors resistance to control the heating unit's power supply, disconnecting it when abnormal temperatures are detected to prevent overheating, featuring a chip, triode, metal oxide semi-conductor field effect transistor, and resistors to manage power and indicate normal or malfunctioning status through light emitting diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature control is added to prevent overheating, then safety is improved, but device complexity increases
Solution Approach 1:
The patent implements temperature feedback control by continuously monitoring the resistance of the heating coil (which changes with temperature) and automatically adjusting or disconnecting power supply when abnormal temperature rise is detected, thereby preventing overheating and dry burning while maintaining system safety without excessive complexity
Solution Approach 2:
The heating coil's own resistance change serves as the temperature sensor signal source, eliminating the need for separate temperature sensors. The system uses the inherent electrical property change of the heating element itself to trigger protection, achieving self-diagnosis and self-protection functionality
2Temperature
If temperature monitoring components are added, then temperature control is improved, but device size increases
Solution Approach 1:
The heating coil serves dual functions: both as the heating element and as the temperature sensor. The resistance change of the heating coil itself provides temperature information, eliminating the need for separate temperature sensing components and reducing overall device size
Solution Approach 2:
The patent merges the heating function and temperature sensing function into a single component (the heating coil). The same component that generates heat also provides the resistance signal that indicates temperature status, consolidating multiple functions into one element to minimize device volume
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
Effectively prevents overheating and device burnout by disconnecting the heating unit from power when e-liquid is low, ensuring safe operation and user health protection without increasing the device's size, using a simple yet effective circuit for temperature control.
Implementation Method 1
utilizing atomizers to heat and atomize e-liquid
Implementation Method 2
heat and atomize e-liquid
Implementation Method 3
material of the heating unit and/or the leads is thermo-sensitive whose resistance varies along with the temperature in certain proportion
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An electronic cigarette capable of temperature control and a temperature control method therefor, the electronic cigarette comprises a casing (10), a liquid storage device (101) within the casing (10), an atomizing assembly, a power supply (102), and a circuit control board (103) having a smoking switch SW, the atomizing assembly comprises a heating unit and leads thereof made from thermo-sensitive material whose resistance varies along with the temperature in certain proportion, the circuit control board (103) comprises a power supply managing module (104) which determines temperature of the heating unit and leads thereof by continuously detecting their resistance when the smoking switch SW on, and sends corresponding control signal to make the heating unit and leads thereof connect to/disconnect from the power supply (102) to achieve temperature control, pernicious gas and burnt matter produced by heating unit dry-burn caused by lack of e-liquid threatening users' health is prevented.