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Array jet plasma system and method for rapidly disinfecting surface pathogenic microorganisms

A technology of jet plasma and pathogenic microorganisms, used in disinfection, sanitary equipment for toilets, buildings, etc., can solve the problems of small coverage area, difficult power matching, high energy consumption, etc., to reduce the generation of harmful gases and break through technical bottlenecks , the effect of strengthening the effect

Active Publication Date: 2022-02-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional plasma jet kills a small coverage area, which is only suitable for micro-area treatment such as skin and teeth, and cannot meet the application requirements of industrial large-scale disinfecting (such as pathogenic microorganisms on the outer surface of the packaging box) and other scenarios.
Conventional arrayed atmospheric pressure jets are affected by problems such as uneven gas distribution, difficult power supply matching, and high energy consumption, so it is difficult to ensure the uniformity of discharge and jet stability

Method used

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  • Array jet plasma system and method for rapidly disinfecting surface pathogenic microorganisms
  • Array jet plasma system and method for rapidly disinfecting surface pathogenic microorganisms
  • Array jet plasma system and method for rapidly disinfecting surface pathogenic microorganisms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] In Embodiment 1, the box size of the jet plasma subsystem 40 (such as image 3 shown), the length is denoted as A, the width is denoted as B, and the height is denoted as C, with a length of 150mm, a width of 150mm, and a height of 130mm, including 33 hollow medium pipes (9) arranged in an array, and the distance between adjacent hollow medium pipes ( D. 9 ) is 8mm. The diameter of the restrictor hole (6) is 0.52mm, and the inner diameter of the hollow medium pipe (9) (d 9 ) is 8mm, the outer diameter is 13mm, the length (h 9 ) is 85mm. The distance (H 8-11 ) is 40mm, the distance (H 11 ) is 25mm. The effective killing area of ​​a single jet plasma subsystem 40 is 174.2cm 2 .

[0088] In Example 1, the gas composition is controlled by the gas supply subsystem 20 to be argon with a volume fraction greater than 99.9%, and the flow rate is 132 L / min, and then it is filled into the gas inlet chamber 5 of the jet plasma subsystem 40 and purged.

[0089] In Embodiment ...

Embodiment 2

[0093] In Embodiment 2, a jet plasma subsystem 40 of the same size as in Embodiment 1 is used.

[0094] In Embodiment 2, the gas composition is controlled by the gas supply system to be 95% argon by volume fraction, 5% oxygen, and the flow rate is 132L / min, which is then filled into the inlet chamber 5 of the jet plasma subsystem 40 and purged .

[0095] In Embodiment 2, under the atmosphere environment of the air inlet cabin 5 of the jet plasma subsystem 40, the modulated pulse power supply is switched on, and a high voltage of 10KV is applied to the high voltage electrode plate 7, and the sine frequency is adjusted to be 20kHz, and the pulse duty ratio is 60 %, the power of the power supply is 330w, and the voltage of the power supply is 200V, forming a large-area and uniform array plasma flow.

[0096] In Example 2, the object to be sterilized is placed on the conveying system, the distance between the hollow medium tube and the surface of the object is adjusted to be 15mm...

Embodiment 3

[0099] In Embodiment 3, a jet plasma subsystem 40 of the same size as in Embodiment 1 is used.

[0100] In Example 3, the gas composition is controlled by the gas supply system to be 95% argon by volume fraction, 2% N 2 O gas, with a flow rate of 132 L / min, is then filled into the intake chamber 5 of the jet plasma subsystem 40 and purged.

[0101] In Embodiment 3, under the atmosphere environment of the air inlet cabin 5 of the jet plasma subsystem 40, the modulated pulse power supply is switched on, a 15KV high voltage is applied to the high voltage electrode plate 7, and the sine frequency is adjusted to be 20kHz and the pulse duty ratio is 60. %, the power of the power supply is 330w, and the voltage of the power supply is 200V, forming a large-area and uniform array plasma flow.

[0102] In Example 3, the object to be sterilized is placed on the conveying system, the distance between the hollow medium tube and the surface of the object is adjusted to be 15 mm, and the co...

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Abstract

The invention discloses a system and method for quickly disinfecting surface pathogenic microorganisms by array jet plasma, in which the gas supply subsystem (20) includes a gas source, a bubble tower and a gas mixing tank; the jet plasma subsystem (40) Including air intake chamber (5), high-voltage electrode plate (7), grounding plate (11), hollow dielectric pipe (9), metal needle (8), fixed silicone pad; power supply subsystem (12) and transmission subsystem ( 30). The mixed gas is introduced into the intake chamber (5) connected to the power supply, so that the working carrier gas forms a large-area, uniform density plasma; the multi-tube flow is evenly distributed through the flow-limiting hole (6), reaching needle- Array electrodes in the form of ring discharge; reduce useless power consumption by modulating the pulse source, control the composition and concentration level of active components in the plasma flow through the composition of the atmosphere, and control the disinfecting time through the speed regulation of the transmission system. The device and method involved in the invention can achieve low energy consumption, large area, and rapid elimination of pathogenic microorganisms on the surface of objects under normal temperature, refrigeration, and freezing conditions.

Description

technical field [0001] The present invention relates to the technical field of disinfecting surface pathogenic microorganisms, and more particularly refers to a system and method for rapidly disinfecting surface pathogenic microorganisms with array jet plasma. Background technique [0002] Low-temperature plasma (Non-thermal Plasma, NTP) is also known as non-equilibrium plasma. During the entire process of plasma formation, the temperature (ie energy) of electrons reaches 1-20eV, but the temperature of other particles is lower. , almost equal to room temperature, in a state of complete disequilibrium. Plasma contains a large number of active ions, such as positive and negative ions, photons, high-energy electrons and free radicals, etc. These active ions can be used to kill pathogenic microorganisms (such as bacteria, viruses, etc.). [0003] Plasma jet is an important form of discharge in disinfecting pathogenic microorganisms. This technology consists of a tube-type disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L2/14A61L2/26
CPCA61L2/14A61L2/26A61L2202/11
Inventor 李想申芳霞阴勇杨毅
Owner BEIHANG UNIV
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