Air cleaner with rotating corona electrode

Abstract

The present invention belongs to the technical field of low-temperature plasma applications, and relates to an air purifier having a rotation corona electrode. The air purifier comprises a blade wheel, disc-shaped corona electrodes, a cylindrical dust collecting electrode, a motor, a motor rotation shaft, a fastening strip, a housing, a gas inlet blocking network, a wind outlet blocking network, a control panel and a high-voltage power supply, and is characterized in that a plurality of the disc-shaped corona electrodes are connected on the motor rotation shaft in series at equal intervals to form a corona electrode group, the motor rotation shaft is arranged on the axis core of the cylindrical dust collecting electrode, the disc-shaped corona electrode is driven by the motor to perform high speed rotation, and after a high voltage is applied between two groups of the electrodes, the strong local electric field gain effect can be formed at the place close to the slender tip of the disc-shaped corona electrode edge, and the gas close to the terminal end can be broken down to form local corona discharge while the place close to the cylindrical dust collecting electrode does not produce the electric field gain effect and the electric field strength is lower than the gas breaking-down threshold value so as to inhibit the generation of the micro electrical arc discharge. According to the present invention, the rotation corona electrode has advantages of micro electrical arc discharge resistance, long electrode service life, good corona stability, good discharge uniformity and compact device, and is suitable for air purifiers and waste gas treatment systems.

Description

technical field [0001] The invention belongs to the technical field of low-temperature plasma application, and in particular relates to an air purifier provided with a rotating corona electrode. Background technique [0002] Low-temperature plasma is being widely used in air purification and exhaust gas treatment systems, and the application value of plasma technology has received unprecedented attention. Corona discharge plasma is the most widely used technology due to its simple device and low cost. However, the currently used discharge devices are all fixed electrode structures, and thin metal wires are used as corona electrodes, which are easy to break and have a service life of more than three Up to six months, for example: the Chinese invention patent application number is 200710038821.4, and the name of the invention is "Assembled building block type narrow-pitch electrostatic field device". Although the corona electrode with jagged or needle-like structure is not ea...

AI Technical Summary

Problems solved by technology

Corona discharge plasma is the most widely used technology due to its simple device and low cost. However, the currently used discharge devices are all fixed electrode structures, and thin metal wires are used as corona electrodes, which are easy to break and have a service life of more than three Up to six months, for example: China's invention patent application number is 200710038821.4, and the name of the invention is "Assembled building block type narrow-pitch electrostatic field device"

Although the corona electrode with jagged or needle-shaped structure is not easy to break, the dual effects of long-term discharge at the tip, heat generation and ion sputtering lead to the tip being easily passivated and micro-arc discharge phenomenon

The thin strip-shaped corona electrode is not easy to break, and can obtain the discharge effect similar to thin metal wires. However, gaps are prone to occur on the strip-shaped electrode, forming partial micro-discharge. For example: Chinese invention patent application number is 200910263798.8, and the invention name is " Metal strip--plate structure reactor》

The above four most commonly used corona electrodes all have the problems of poor discharge uniformity and short electrode life, often only a few months, needing regular inspection and replacement of corona electrodes, and high maintenance costs. If the wire is broken, it will fail immediately, or local micro-discharge will occur, which will lead to problems such as rapid decline in purification effect and excessive ozone, which seriously restricts its popularization and application, especially not suitable for the field of ordinary indoor air purifiers

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