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Method for uniform glow discharge in atmosphere air

A technology of glow discharge and atmospheric pressure, used in corona discharge devices, circuits, electrical components, etc., can solve the problems of low efficiency, high cost, and inability to change high-power high-frequency power supplies, and achieve the effect of eliminating the phenomenon of filaments

Inactive Publication Date: 2007-12-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0003] Invention patent 96117213.4 discloses a method for improving the power utilization rate of this type of discharge device by combining main and auxiliary discharges. The requirements for the output power and frequency of the main and auxiliary discharge power sources are: 1)P 主 >>P 辅 2) f 主 辅 (P: power, f: frequency), and with the development of high-frequency power supply technology, the shortcomings of low efficiency, complex structure, and high cost of high-power high-frequency power supply have been overcome through the transformation and design of the power supply itself, without auxiliary discharge. The power utilization rate of this type of discharge device has reached a very high level.
However, at present, a number of experimental studies have been carried out at home and abroad on the use of high-frequency capacitive dielectric barrier discharge to realize the glow discharge in the air under atmospheric pressure, which still cannot solve the problem of uneven air discharge. Filament Phenomena in Medium Dielectric Barrier Discharge

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  • Method for uniform glow discharge in atmosphere air

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Embodiment Construction

[0008] The specific embodiment of the present invention is that the external plasma source 1, plasma nozzle 2, and high-frequency capacitive dielectric barrier discharge device 3 for preparing plasma are arranged as shown in Figure 1, and the plasma nozzle 2 is parallel to the high-frequency capacitive dielectric The distance between the gas gap of the barrier discharge device 3 and the dielectric barrier layer of the dielectric barrier discharge device 3 is 1 cm, and the plasma injection direction points to the center of the gas gap. The metal electrode 11 of the external plasma source 1 is connected to the AC power source 12 of 20 kHz, and the voltage of the AC power source 12 is gradually increased to cause arc discharge on the metal electrode 11 to generate plasma. The gas flow pressure is 4 atmospheres and the gas flow rate is 3 The gas flow of cubic meters per minute sprays the plasma into the gas gap of the high-frequency capacitive dielectric barrier discharge device 3 ...

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Abstract

This invention relates to a method for realizing uniform glow-discharge in air under the atmospheric pressure, which utilizes an additive plasma source without circuit connection with the high frequency capacitor medium block discharge device to inject initial plasmas to the discharge space and increase charge density to realize uniform glow discharge in air under the atmospheric pressure. When the medium block air gap distance is 2-6 mm, it generates uniform glow discharge and eliminates the thread phenomenon.

Description

technical field [0001] The invention belongs to the technical field of gas discharge, and relates to a method for realizing uniform glow discharge in air under atmospheric pressure. Background technique [0002] Low-temperature plasma surface treatment can cause a variety of physical and chemical changes on the surface of materials, changing its hydrophilicity, adhesion, dyeability and electrical properties, etc., and has broad industrial application prospects. The low-temperature plasma generated by glow discharge has special advantages in processing some fiber materials due to its moderate power density and uniform distribution, but whether it is glow discharge under low pressure or atmospheric pressure achieved in some special gases such as helium The lower glow discharge is inseparable from the vacuum device, which greatly affects the realization of flow operation and the improvement of production efficiency, and increases the operating cost. High-frequency (1 kHz ~ 100...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01T23/00H01T19/00H05H1/00C01B13/11
Inventor 李成榕詹花茂丁立健万京林李明
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)