Corona Plasma Cell With Needle Electrode And Ozone Catalyst

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Solution Overview

Problem

Existing corona plasma devices are inefficient in terms of ionization, occupy large volumes, and consume excessive electrical energy, and they produce ozone as a byproduct which requires post-treatment for neutralization.

Innovation Solution

A corona plasma cell design featuring a needle-shaped polarized electrode with a low-profile cylinder and a porous film, along with a dual element configuration of two symmetrically arranged cells, and a plasma reactor setup with an ozone-decomposing catalyst, overpressurizing means, and specific filter materials to manage ozone and improve ionization efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If a traditional corona plasma device uses a polarized electrode and ground electrode with large separation distance to produce plasma, then plasma generation is achieved, but the device occupies large volume and consumes excessive electrical energy

Engineering Contradiction:

Improvedevice volumeVSAvoidelectrical energy consumption

Core Design Contradiction:

Volume of moving objectVSUse of energy by moving object

Solution Approach 1:

The invention transitions from a conventional wire-cylinder configuration to a needle-plane configuration where the polarized electrode is arranged perpendicular to the ground electrode plane. This dimensional change allows the plasma generation region to be compressed in one direction while maintaining effectiveness, reducing overall device volume and energy consumption.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The invention changes the geometric parameters of the electrode configuration by using a needle-shaped polarized electrode with small radius of curvature arranged perpendicular to a planar ground electrode. This parameter change enables plasma generation at lower voltages and reduced distances, decreasing both device volume and energy consumption.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If a corona plasma device uses a needle-shaped polarized electrode perpendicular to a planar ground electrode, then ionization efficiency is improved, but ozone production increases requiring post-treatment

Engineering Contradiction:

Improveionization efficiencyVSAvoidozone production

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The invention incorporates an ozone-decomposing catalyst downstream of the ionizer to convert the harmful ozone byproduct into beneficial oxygen. This transforms the harmful effect of increased ozone production into a useful function, allowing high ionization efficiency to be maintained while eliminating the harmful byproduct.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Volume of moving object

If a corona plasma device uses a low-profile cylinder ground electrode with porous film, then device size is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvedevice sizeVSAvoidmanufacturing complexity

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The ground electrode is segmented into two distinct components: a low-profile cylindrical structure and a porous film layer. This segmentation allows each component to be manufactured separately using optimized processes and then assembled, reducing overall manufacturing complexity while achieving the desired compact size.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The ground electrode combines a cylindrical structure with a porous film material to create a composite electrode assembly. This composite approach enables the device to achieve compact dimensions while the porous film provides the necessary electrical and structural properties, with each material contributing its optimal characteristics.

Inventive Principle:

Principle #40Composite materials

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 design reduces the overall size and energy consumption of the plasma device, enhances ionization efficiency, extends the device's lifespan, and effectively decomposes ozone, ensuring safer and more efficient air treatment.

Implementation Method 1

produce, by corona discharge, a plasma and an ion flow

Methodology Applied

Scientific EffectCorona discharge: Corona Discharge

Implementation Method 2

ionization allows, by ion deposition, to charge a particle contained in the fluid

Methodology Applied

Scientific EffectIonization: Ionisation

Implementation Method 3

a porous film (15) substantially plane perpendicular to the polarized electrode (12)

Methodology Applied

Scientific EffectPermeation: Permeation

Implementation Method 4

at least one catalyst downstream of the ionizer and the at least one filter downstream of the ionizer, which catalyst allows the decomposition of ozone

Methodology Applied

Scientific EffectCatalysis: Catalysis

Data Source

PatentUS11291102B2Corona effect plasma device and plasma reactor

Publication Date: 2022.03.29 AIRINSPACE S E

AI summary

A corona plasma cell includes a polarized electrode and a ground electrode, including a cylinder and a porous film, with the cylinder having a low profile and the polarized electrode not entering the cylinder; a corona plasma dual element including a first cell, a second cell having such a structure, which first and second cell are symmetrically arranged; and finally a plasma reactor including a plurality of cells or dual elements.