Low-temperature plasma jet generator unit device

Abstract

The utility model discloses a low-temperature plasma jet generator unit device, which belongs to the field of low-temperature plasma cold sterilization technical equipment and comprises an internal conical high-voltage electrode and a stepped conical shell ground electrode, and the high-voltage electrode and the shell ground electrode are connected through an insulating sleeve matched with a splitter plate. The distance between the high-voltage electrode and the shell ground electrode is controlled to be 3.0-7.5 mm, the surface of the high-voltage electrode is coated with a nanometer barrier material, and a high-voltage electric field is formed under the action of high electricity of 18-25 kV. According to the device, the surface of the high-voltage electrode is coated with the nano high-barrier material, so that the working voltage of the device can be improved by 50%-100% compared with that of an existing experimental device, meanwhile, the optimal discharging effect is achieved by controlling the distance of discharging nodes, and therefore efficient, stable, large-flux and low-energy-consumption low-temperature plasma jet flow with the high sterilization efficiency is generated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the low temperature plasma cold sterilization technical equipment field, and specifically relates to a low temperature plasma jet generator unit device. BACKGROUND

[0002] The low temperature plasma cold sterilization is a latest food cold sterilization technology in the world at present, and secondary pollution and chemical residues are not caused to products during sterilization, and the safety is high, the sterilization process is short, the temperature rise is low, and the energy consumption is low, and the large-scale development of fresh food can be adapted to. The low temperature plasma jet generator unit device is the most basic core component of the low temperature plasma cold sterilization technology, and the configuration and optimization of the structure and material of the low temperature plasma jet generator unit device are related to or determine the formation and constituent ratio of active oxygen nitrogen free radicals, ozone and other cold sterilization active groups of the plasma jet, the stability of the high-voltage electric field formed by the linkage adjustable frequency high-voltage power supply, the high-voltage arc discharge degree between the inner electrode and the outer electrode, the energy consumption and the temperature rise, the working voltage of the high-voltage electric field formed by the current technical device is low, the plasma is formed by the high-voltage arc discharge excitation medium gas, the plasma jet generation efficiency is low, the ozone production amount is high, the energy consumption and the temperature rise are high, and the application development is seriously restricted, and whether breakthrough can be made on the basis becomes the bottleneck of the low temperature plasma cold sterilization technology.

[0003] The application patent publication No. CN110913553B discloses a kind of high-efficiency plasma activated water generation equipment, including plasma jet generator by ground electrode, high-voltage electrode and dielectric tube etc., high-voltage electrode outer layer is dielectric tube, dielectric tube outer layer is ground electrode, ground electrode outer layer is four fluorine sleeve as insulation layer;Ground electrode and high-voltage electrode are connected with high-voltage power supply respectively, but the plasma jet generator processing capacity is very small, can only be used for experimental type plasma activated water generator device.

[0004] In order to break through the bottleneck of the low temperature plasma cold sterilization core technical component, it is imperative to develop a low temperature plasma jet generator unit device with high efficiency, low energy consumption, low ozone production and low temperature rise, and to provide basic components for large flux low temperature plasma jet combination generator. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of low temperature plasma jet generator unit device to the defects of existing plasma generator.

[0006] The utility model provides the following technical scheme:

[0007] A low-temperature plasma jet generator unit device, comprising an internal conical high-voltage electrode and a stepped conical shell ground electrode, the high-voltage electrode and the shell ground electrode are connected through a shunt plate matched by an insulating sleeve, the distance between the high-voltage electrode and the shell ground electrode is controlled at 3.0-7.5mm, the surface of the high-voltage electrode is coated with nano barrier material, and a high-voltage electric field is formed under the action of high voltage of 18-25kV.

[0008] Specifically, the insulating sleeve between the high-voltage electrode and the shell ground electrode can withstand a high voltage of 30kV for a long time.

[0009] Specifically, the shunt plate is uniformly distributed with airflow guide holes and end faces forming a certain angle, guiding the airflow to form a spiral propulsion around the conical high-voltage electrode, and forming a low-temperature plasma jet under the action of high-voltage electric field excitation ionization.

[0010] Specifically, the shell ground electrode is provided with two or more stepped conical shapes to form two or more small gaps between the high-voltage electrode and the ground electrode to form arc discharge points.

[0011] Specifically, the high-voltage electrode surface is coated with nano high-barrier material, which is a nano ceramic material capable of withstanding >50kV high voltage, and the nano ceramic raw material is 30-80nm ceramic particles.

[0012] The beneficial effects of the utility model are:

[0013] The device of the application is coated with nano high-barrier material on the surface of the high-voltage electrode, so that the working voltage can be increased by 50%-100% compared with the current experimental type, and the distance of the discharge node is controlled to achieve the best discharge effect, thereby realizing efficient and stable, high-flux and low-energy-consumption generation of low-temperature plasma jet with high sterilization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0015] Figure 1 is the sectional view of the utility model;

[0016] In the figure, the marks are: 1, shell ground electrode; 2, insulating sleeve; 3, shunt plate; 4, high-voltage electrode. DETAILED DESCRIPTION

[0017] As Figure 1As shown, the utility model provides a kind of low-temperature plasma jet generator unit device, including internal conical high voltage electrode 4 and stepped conical shell ground electrode 1, high voltage electrode 4 and shell ground electrode 1 are connected by insulating sleeve 2 cooperation shunt plate 3, the spacing between high voltage electrode 4 and shell ground electrode 1 is controlled at 3.0-7.5mm, high voltage electrode 4 surface is coated with nano barrier material, to form high voltage electric field under the high electric effect of 18-25kV, nano barrier material can improve voltage bearing capacity, increase discharge effect, to further increase the amount of plasma generation.

[0018] Wherein the insulating sleeve 2 between high voltage electrode 4 and shell ground electrode 1 can withstand 30kV high voltage long time work, to help maintain the stability of high voltage electrode 4 discharge, reduce the electrical interference between electrode and shell ground electrode 1;Shunt plate 3 evenly distributed airflow guide hole and end face form a certain angle, guide airflow around conical high voltage electrode forms helical shape propulsion, in high voltage electric field excitation ionization and form low-temperature plasma jet.

[0019] Specifically, insulating sleeve 2 is a non-metallic material.

[0020] Further, relative to the original plasma generator, the overall size of the device is extended, and the conical surface discharge surface area of high voltage electrode 4 is extended from the original 2715mm 2 To 12300mm 2 , effective working area is expanded by more than 4.5 times, to increase the gas turbulence space, increase ionization time, to reduce the amount of ozone generation.

[0021] Shell ground electrode 1 is provided with more than two stepped conical to form two or more small gaps between high voltage electrode and ground electrode, to form arc discharge point.

[0022] Specifically, the nano high barrier material coated on the surface of high voltage electrode 4 is a nano ceramic material capable of withstanding >50kV high voltage, and the nano ceramic raw material is 30-80nm ceramic particles.

[0023] The device of the application can increase the working voltage by 50%-100% compared with the current experimental type by coating nano high barrier material on the surface of high voltage electrode 4, and by controlling the distance of discharge node to achieve the best discharge effect, so as to realize high-efficiency and stable, large-flux and low-energy-consumption generation of low-temperature plasma jet with high sterilization efficiency.

[0024] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low temperature plasma jet generator cell device comprising an inner conical high voltage electrode and a stepped conical housing ground electrode, connected by an insulating sleeve fitted splitter plate between the high voltage electrode and the housing ground electrode, characterised in that, The distance between the high-voltage electrode and the shell ground electrode is controlled at 3.0-7.5 mm, and the surface of the high-voltage electrode is coated with nano barrier material to form a high-voltage electric field under the action of high voltage of 18-25 kV.

2. A low temperature plasma jet generator cell device according to claim 1, wherein, The insulating sleeve between the high-voltage electrode and the shell ground electrode can withstand high voltage of 30 kV for long time work.

3. A low temperature plasma jet generator cell apparatus according to claim 1, wherein, The angle between the uniformly distributed airflow guide holes of the shunt plate and the end face guides the airflow to form a spiral propulsion around the conical high-voltage electrode, and the high-voltage electric field excites ionization to form a low-temperature plasma jet.

4. A low temperature plasma jet generator cell device according to claim 3, wherein, The shell ground electrode is provided with two or more stepped conical shapes to form two or more small gaps between the high-voltage electrode and the ground electrode to form arc discharge points.

5. A low temperature plasma jet generator cell device according to claim 3 or 4, wherein, The surface of the high-voltage electrode is coated with nano high-barrier material, which is a nano ceramic material capable of withstanding high voltage of >50 kV, and the nano ceramic raw material is ceramic particles of 30-80 nm.

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