Electronic Atomization Device with Alternating Electrode Polarity
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Solution Overview
Problem
Conventional plasma heating in electronic atomization devices suffers from poor spatial uniformity of heating and electrode damage due to temperature gradients and electrode ablation.
Innovation Solution
An electronic atomization device with an electrode assembly where the polarity of the first and second electrodes is switched in a preset cycle, using a power supply assembly to provide high-voltage alternating current and a control assembly to convert and switch the polarity, ensuring uniform heating and preventing electrode damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If direct current high-voltage power supply is used for plasma heating, then heating function is achieved, but spatial uniformity of heating deteriorates due to temperature gradient from high-voltage electrode to low-voltage electrode
Solution Approach 1:
The patent applies periodic action by alternating the polarity of the high-voltage power supply in cycles. The control unit switches the polarity between positive and negative states, causing the high-voltage electrode to alternate between being the anode and cathode. This periodic polarity reversal ensures that both electrodes receive comparable heating over time, eliminating the temperature gradient and improving spatial uniformity of heating.
2Temperature
If direct current high-voltage power supply is used for plasma heating, then heating function is achieved, but electrode reliability deteriorates due to negative electrode ablation from positive ion bombardment
Solution Approach 1:
The patent uses periodic polarity reversal to alternately switch the roles of the two electrodes as anode and cathode. By doing so, the accumulated ablation damage on any single electrode is significantly reduced because each electrode spends only part of the time as the negative cathode subject to ion bombardment. This extends electrode service life and improves reliability.
Solution Approach 2:
The patent implements a polarity switching mechanism where electrodes alternately discard their cathode role (and associated ablation damage) and recover as anodes. This periodic role reversal prevents any single electrode from accumulating excessive damage, effectively recovering electrode integrity over time through alternating usage patterns.
3Strength
If high-temperature resistant electrode material is used, then electrode ablation is slowed, but electrode damage still occurs and electrodes become unable to discharge
Solution Approach 1:
The patent employs periodic polarity reversal to prevent any single electrode from being continuously exposed to high-temperature ablation conditions. By alternating which electrode serves as the negative cathode, the thermal and mechanical stress on each electrode is distributed over time, preventing catastrophic failure and maintaining discharge capability.
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 achieves more uniform heating of the aerosol-generating medium and prevents electrode damage by alternating the electrode polarities, enhancing the spatial uniformity and longevity of the device.
Implementation Method 1
an electric arc is controlled to be formed between the first electrode and the second electrode to generate plasma
Implementation Method 2
generate plasma, and negative and positive polarities of the first electrode and the second electrode are switched in a preset cycle
Data Source
Figure 1
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AI summary
This application relates to an electronic atomization device. The electronic atomization device includes: a substrate, a heating cavity being formed in the substrate ; and an electrode assembly, including a first electrode and a second electrode, both the first electrode and the second electrode at least partially extending into the heating cavity, where in the heating cavity, an electric arc is controlled to form between the first electrode and the second electrode, plasma is generated, and negative and positive polarities of the first electrode and the second electrode are switched in a preset cycle. The first electrode and the second electrode alternately have the negative and positive polarities, so that the negative electrode with the high temperature alternately appears on the first electrode and the second electrode. In this way, the uniformity of a heating space heated by the plasma is better, and the electrodes are not easily damaged.