Generating device for atmospheric bare electrode cold plasma jet

Abstract

The invention provides a generating device for an atmospheric bare electrode cold plasma jet. The generating device comprises a working gas source, a pressure reducing valve, an adjustable flow meter, a high-voltage power supply, a cylindrical shell, a nozzle electrode and a pin electrode, wherein the tail part of the cylindrical shell made of insulating material is connected with a gas supply system; the front end of the cylindrical shell is connected with the nozzle electrode through a thread; the pin electrode is fixedly arranged in a central hole of the cylindrical shell; a certain discharging clearance is kept between the tip of the pin electrode and the nozzle electrode; a plurality of through holes parallel to the central hole of the cylindrical shell are distributed around the central hole; the through holes are used for conveying the working gas to a discharging area in the nozzle electrode; a high-voltage output end of the high-voltage power supply is connected with the pin electrode; and a low-voltage output end of the high-voltage power supply is connected with the nozzle electrode and is grounded. Cold plasma is generated at the tip of the pin electrode by adjusting the high-voltage power supply and the flow of the working gas, and the cold plasma is jetted from an outlet of the nozzle electrode so as to form the cold plasma jet. According to the generating device provided by the invention, uniform and stable cold plasma jet can be obtained under an atmospheric open air environment.

Description

technical field [0001] The invention belongs to the technical field of plasma discharge reactors, and relates to an atmospheric pressure bare electrode cold plasma jet generating device. Background technique [0002] Plasma can be divided into two types according to thermodynamic properties, one is high-temperature plasma, the macroscopic temperature is as high as 10 6 ~10 8 K, in a state of thermodynamic equilibrium; the second is a low-temperature plasma, with a lower macroscopic temperature, about 10 2 ~10 5 K. Low-temperature plasma can be divided into thermal plasma according to temperature (macroscopic temperature 10 3 ~10 5 K, thermodynamic equilibrium or near thermodynamic equilibrium) and cold plasma (macroscopic temperature 10 2 ~10 3 K, non-thermodynamic equilibrium). [0003] Although the macroscopic temperature of cold plasma is not high, the ratio of electron temperature to gas temperature is about 10 to 100 to 1, so it also has high chemical activity: ...

AI Technical Summary

Problems solved by technology

However, the current research on using nitrogen or oxygen as working gas to generate atmospheric pressure-cooled plasma jets is still immature.

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