Mixed gas double-convergence dielectric barrier discharge low-temperature plasma generating apparatus

Abstract

The invention discloses a mixed gas double-convergence dielectric barrier discharge low-temperature plasma generating apparatus. The apparatus comprises a shell, a liquid crystal display screen, a single chip microcomputer chip, a gas inlet end, a gas mixing device, a discharge tube, a gas distribution tube, a high-voltage electrode, a ground electrode, a magnetic coil, a grounding wiring terminaland a high-voltage wiring terminal. The shell comprises a control area, a discharge area, a base area and an exhaust area, the gas inlet end is controlled by a drive plate gear, and corresponding numerical values are displayed on the liquid crystal display screen; the gas mixing device comprises a gas inlet end, a gas mixing cavity, a gas mixing pipe, a gas plug and an exhaust hole, and the gas distributing pipe consists of a necking pipe and a hollow circular pipe; the upper part of the high-voltage electrode is a cylinder with a hole in the center, and the lower part is a cylinder with a conical space inside; and the magnetic coil is formed by winding a copper wire with the diameter of 1 mm. The gas mixing device enables working gas to be evenly mixed, the high-voltage electrode and themagnetic coil can gather generated low-temperature plasma and restrain diffusion, and the gas distributing pipe discharges a plasma mixture with high density.

Description

technical field [0001] The invention belongs to the field of low-temperature plasma, and in particular relates to an atmospheric-pressure dielectric barrier discharge low-temperature plasma generating device which has a gas-mixing front end and can converge generated plasma. Background technique [0002] It is a common method to obtain low-temperature plasma by applying high voltage to the two electrodes to break down the gas. Dielectric barrier discharge refers to adding a medium between the high-voltage electrodes at normal temperature and pressure, so that the further development of the discharge can be blocked, thereby generating the required atmospheric pressure cooling plasma. This type of device has low cost, a wide range of applications, and the low current ensures the safety of users. It has great application potential in areas such as medical treatment, sterilization, pollutant removal, organism-induced mutation, and material surface modification. aroused widespre...

AI Technical Summary

Problems solved by technology

If a very thin dielectric tube is used to generate a plasma jet, the too thin tube wall will absorb the charge in the plasma and reduce the concentration of active particles, and the high voltage electrode is too close to the ground electrode, which is easy to break down the medium

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