Plasma Induced Flow Electrode Structure for Air Purification
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Solution Overview
Problem
Current plasma-induced flow electrode structures for air purification have limitations in efficiently generating and containing active species like OH radicals due to their diffusion-limited operating life and difficulty in achieving high density within a localized space, which affects processing efficiency and human health considerations.
Innovation Solution
A plasma-induced flow electrode structure comprising an electrode block, an insulating layer, and an electrode layer, where the electrode block has through holes with the electrode layer disposed on the surface and inside the holes, and an insulating member is used to enhance insulation and reduce electrostatic capacitance, allowing for effective plasma generation and air purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If point discharge structure or mesh discharge structure is used for active species generation, then discharge efficiency is improved, but it is difficult to efficiently use OH radical which only has a diffusion operating life of about several mm from a discharge point
Solution Approach 1:
The patent transitions from point/mesh discharge (0D/1D) to a planar electrode configuration with multiple slits (2D), increasing the discharge area to generate sufficient active species within the limited diffusion distance. The electrode structure includes a first electrode and a second electrode with multiple parallel slits, creating an extended discharge region that produces enough OH radicals to effectively purify air within their short diffusion lifetime.
Solution Approach 2:
The electrode is divided into multiple segments with parallel slits instead of a single continuous structure. This segmentation allows for distributed plasma generation across multiple discharge zones, ensuring that active species are generated at multiple locations close to the air flow path, maximizing utilization within the diffusion limit.
2Productivity
If PA stack is formed by stacking electrodes for air purification, then processing efficiency is improved, but its shape is limited and it is not easy to make a proper structure with circular outer shape and concentric slits
Solution Approach 1:
The patent moves from a stacked 1D configuration to a planar 2D structure with concentric circular slits. This dimensional change enables flexible shape design including circular outer contours while maintaining multiple discharge zones. The planar electrode assembly can be manufactured as a single integrated component rather than stacking multiple layers, achieving both circular geometry and concentric slit patterns.
Solution Approach 2:
The patent combines multiple electrode functions into a single planar structure with concentric slits rather than stacking separate electrode components. The first and second electrodes are integrated into one assembly with concentric circular discharge zones, simplifying manufacturing while achieving the desired circular outer shape and multiple discharge regions for efficient air purification.
3Productivity
If electrode configuration with parallel slits in multiple stages is used, then air purification efficiency is improved, but outer shape flexibility is reduced
Solution Approach 1:
The patent adopts a planar 2D electrode configuration with concentric circular slits instead of stacked 1D parallel slits. This allows the discharge zones to be arranged in concentric circles within a single plane, achieving multiple discharge stages while maintaining flexible outer shapes including circular, rectangular, or other geometries suitable for different applications.
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 proposed structure improves the efficiency of plasma-induced flow generation and air purification by maintaining high active species density locally, enhancing processing efficiency while ensuring human health safety by controlling ozone distribution and reducing diffusion of harmful species.
Implementation Method 1
A plasma induced flow is a gas flow generated by application of high voltage of high frequency between electrodes separated by a dielectric
Implementation Method 2
application of high voltage of high frequency between electrodes separated by a dielectric
Implementation Method 3
discharge methods by various electrode configurations such as point discharge and mesh discharge are devised
Implementation Method 4
As active species occurring in discharge in the atmosphere, there can be cited negative ion and the like such as ozone, OH radical and O2−
Data Source
AI summary
In one embodiment, a plasma induced flow electrode structure has an electrode block, an insulating layer and an electrode layer. The electrode block has first and second surfaces and through holes penetrating between these first and second surfaces. The insulating layer is disposed on the first surface and inside the through holes. The electrode layer is disposed on the insulating layer of the first surface.