Medium in atmospheric pressure blocking off discharging plasma gun

Abstract

The invention belonging to the technique field of plasma application, solves the issue of the high temp of the plasma and the limitation in the prior art. The structure of the plasma gun includes the gun rack, the dielectric medium in hollow tubular type, the external electrode, the inner electrode located in the hollow of the dielectric medium, the insulating core plug. The flowing work air is discharged to generate plasma and jets out from the opening of the hollow so as to form the torch of plasma. The good effect is that the atmospheric pressure medium blocks off the space extension of the discharging plasma; the macroscopic temp is the normal temp; the torch of plasma may have various shapes. The invention widens the application range, raises the application effect, and features easy producing and maintaining.

Description

technical field [0001] The invention belongs to the field of plasma application technology and relates to an atmospheric pressure dielectric barrier discharge plasma gun. Background technique [0002] In the prior art, there are generally two types of discharge plasma sources: one is vacuum discharge, such as: glow discharge, microwave discharge, etc.; the other is atmospheric pressure discharge, such as: corona discharge, dielectric barrier discharge, etc.; There are other classification methods: according to the coldness and heat of the working gas, it can be divided into cold and hot plasma; according to the temperature of plasma electrons, it can be divided into high and low temperature plasma, and they have different characteristics and performances, and their applications are also different. As far as the discharge plasma gun is concerned, there are mainly two types. The first one is a DC arc plasma gun. Its discharge structure is: a working gas is passed between two w...

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Problems solved by technology

The second type is an inductively coupled radio frequency plasma gun. Its discharge structure is as follows: a pulsed high voltage applied to the starting rod (ignition pole) is used to start the plasma, and the winding coil is connected to a high frequency power supply, so that The plasma surrounded by the coil is maintained, and the flowing working gas discharges to generate plasma to be ejected. The plasma ejected from this plasma gun is also a low-temperature plasma with thermodynamic balance, and the macroscopic temperature is also relatively high, ranging from 10,000 to 10,000. 20,000°K, and it must be realized under vacuum conditions, and the structure is complex

As far as ordinary flat electrode atmospheric pressure dielectric barrier discharge plasma is concerned, although the macroscopic temperature of plasma is low, it can be normal temperature, but the plasma is not uniform, especially only in the space between two electrode plates, so its The scope of application has certain limitations

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