Vaping Device Heating Module With Periodic Current Reversal
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Solution Overview
Problem
Portable electrical heating devices, such as those used in personal vaping devices, face issues with uneven heating, carbon deposition, and reduced service life due to constant voltage and current supply methods, leading to poor performance and user experience.
Innovation Solution
A power supply control method that converts DC power into a supply current with periodic variations in direction, instantaneous value, and on-state time, applied to the electrical heating module to balance temperature distribution, prevent carbon deposition, and extend the device's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant voltage and current are supplied to the heating assembly, then the power supply control is simple, but the heating is uneven and carbon deposition occurs
Solution Approach 1:
The patent applies periodic reversal of current direction through the heating assembly. The control circuit periodically switches the polarity of the power supply, causing the current to flow in alternating directions. This periodic action prevents carbon deposition by dislodging carbon particles that form on the heating wire during operation, thereby maintaining heating uniformity and extending service life while keeping the power supply control relatively simple.
Solution Approach 2:
The patent introduces dynamic current direction reversal instead of static constant current. The heating assembly operates with time-varying current direction that is dynamically controlled through a simple logic circuit or microcontroller, enabling the system to adapt and prevent carbon accumulation while maintaining ease of control.
2Device complexity
If constant current flows in one direction through the heating wire, then the power supply method is simple, but the temperature distribution is uneven
Solution Approach 1:
The patent implements periodic current direction reversal to achieve uniform temperature distribution. By alternating the current direction at appropriate intervals, the heating effect is distributed more evenly along the heating wire, preventing localized overheating and carbon deposition while maintaining relatively simple power supply circuitry.
3Productivity
If the heating assembly is continuously heated at high temperature, then the heating efficiency is high, but carbon deposition occurs and service life is shortened
Solution Approach 1:
The patent employs periodic current reversal during the heating process. While maintaining high heating efficiency through continuous power delivery, the periodic reversal of current direction creates mechanical stress and thermal cycling that prevents carbon particles from firmly adhering to the heating wire, thereby extending service life without sacrificing heating productivity.
Solution Approach 2:
The patent converts the potentially harmful effect of continuous high-temperature heating into a beneficial process. By periodically reversing current direction, the thermal and mechanical stresses generated during high-temperature operation are utilized to dislodge and remove carbon deposits, transforming what would be damaging accumulation into a self-cleaning mechanism that extends service life.
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 method ensures uniform heating, prolongs the service life of the electrical heating module, improves user experience by preventing carbon buildup, and reduces energy consumption, while maintaining a stable taste and performance of the vaping device.
Implementation Method 1
The electrical heating module is heated by adopting a DC with a constant instantaneous value... The current I flows from M of the heating wire to N of the heating wire... the heating wire is electrified to generate heat
Data Source
AI summary
Disclosed is a personal vaping device provided with an electrical heating module as an atomizer or heater. The personal vaping device at least includes a power control circuit, which includes a current input terminal, a current input terminal, and a current control module. The power control circuit further includes a power supply control module, a current control module, a voltage modulation module, and a forward and reverse connection current generation module. The microprocessor is configured to control the voltage modulation module and the forward and reverse connection current generation module. The voltage modulation module is configured to regulate a voltage of the DC power supply to a first target voltage and a second target voltage. The forward and reverse connection current generation module is configured to generate a forward connection current and a reverse connection current according to the second target voltage to drive the atomizer or heater for heating.