阅读说明：本技术 一种等离子体空气杀菌消毒设备 (Plasma air sterilization and disinfection equipment ) 是由 何诗怡 于 2020-08-03 设计创作，主要内容包括：本发明公开一种等离子体空气杀菌消毒设备,包括等离子体产生装置和纳秒级高压脉冲电源；等离子体产生装置用于安装在出风管道内,包括高压电极、介质层以及低压电极。纳秒级高压脉冲电源提供的纳秒级高压脉冲能够使低压电极与介质层之间产生介质阻挡沿面放电,进而产生等离子体和紫外光,等离子体中含有的大量高能电子、活性离子、高能自由基团等成分,极易与细菌、霉菌及芽孢、病毒中蛋白和核酸发生化学反应,能够摧毁微生物和扰乱微生物的生存功能,使各类微生物死亡。来自新风管道的新风经过上述等离子体和紫外光杀菌消毒后经送风机送入出风管道并输出。该设备具有消毒效果好、效率高、工艺简单、无二次污染、运行成本低廉、操作方便等特点。(The invention discloses plasma air sterilization and disinfection equipment, which comprises a plasma generating device and a nanosecond high-voltage pulse power supply; the plasma generating device is arranged in the air outlet pipeline and comprises a high-voltage electrode, a dielectric layer and a low-voltage electrode. The nanosecond high-voltage pulse provided by the nanosecond high-voltage pulse power supply can enable a medium between the low-voltage electrode and the medium layer to block surface discharge, so that plasma and ultraviolet light are generated, a large number of high-energy electrons, active ions, high-energy free radicals and other components contained in the plasma are easy to chemically react with proteins and nucleic acids in bacteria, molds, spores and viruses, and can destroy microorganisms and disturb the survival function of the microorganisms, so that various microorganisms die. Fresh air from the fresh air pipeline is sterilized and disinfected by the plasma and the ultraviolet light, and then is sent into the air outlet pipeline by the air feeder and is output. The equipment has the characteristics of good disinfection effect, high efficiency, simple process, no secondary pollution, low operation cost, convenient operation and the like.)

1. A plasma air sterilization and disinfection equipment is characterized in that: the device comprises a plasma generating device and a nanosecond high-voltage pulse power supply; the plasma generating device is arranged in an air outlet pipeline and comprises a high-voltage electrode connected with the high-voltage end of the nanosecond high-voltage pulse power supply, a dielectric layer sleeved outside the high-voltage electrode and a low-voltage electrode connected with the low-voltage end of the nanosecond high-voltage pulse power supply, wherein the low-voltage electrode is arranged outside the dielectric layer; the nanosecond high-voltage pulse provided by the nanosecond high-voltage pulse power supply can enable dielectric barrier creeping discharge to be generated between the low-voltage electrode and the dielectric layer, and further plasma and ultraviolet light are generated.

2. The plasma air sterilization and disinfection apparatus of claim 1, wherein: the plasma generating device is a fence structure reactor formed by an array of surface pulse discharge ceramic tubes.

3. The plasma air sterilization and disinfection apparatus of claim 2, wherein: in the reactor with the fence structure, the high-voltage electrode adopts a stud high-voltage electrode.

4. A plasma air sterilizer apparatus according to claim 3, wherein: and a ceramic sleeve is sleeved on the outer layer of the stud high-voltage electrode to serve as the medium layer.

5. The plasma air sterilization and disinfection apparatus of claim 4, wherein: and a metal wire is wound outside the ceramic sleeve to form a metal wire wound low-voltage electrode.

6. The plasma air sterilization and disinfection apparatus of claim 5, wherein: the metal wire is spirally wound around the metal wire of the low-voltage electrode.

7. A plasma air sterilizer apparatus according to claim 2 or 3, wherein: the fence structure reactor comprises fixed supports, and the discharge ceramic tube array is fixed between the two fixed supports.

8. The plasma air sterilization and disinfection apparatus of claim 7, wherein: the fixed support is a nylon fixed support.

9. The plasma air sterilization and disinfection apparatus of claim 2, wherein: in the discharge ceramic tube array, the number of the array ceramic tubes is 4 multiplied by 5, and the distance between adjacent ceramic tubes is 30 mm.

Technical Field

The invention relates to the technical field of air sterilization and disinfection, in particular to plasma air sterilization and disinfection equipment.

Background

At present, central air conditioners are widely used in large markets, large hotels, office buildings and large hospital office environments, bacteria and viruses can survive and propagate after long-term operation, particularly in the high-incidence period of influenza viruses, a large amount of bacteria and viruses in ventilation pipelines which operate for many years propagate and circulate in the air, and the human health is seriously influenced. Generally, the number of people in the central air-conditioning use place is large, and especially the identity of people is not clear in public places where the central air-conditioning is open to the outside. Bacteria and viruses in the air easily cause cross infection of the bacteria through a ventilation system of the central air conditioner, so that indoor environment pollution is caused, and various diseases are brought to more people. However, since the pipeline structure of the central air conditioner is complex and the space is narrow, people can hardly directly enter the central air conditioner for cleaning, and even if a fresh air system is started, bacteria and viruses can not be killed. Therefore, in order to prevent and control the spread of bacteria and viruses in local space, the centralized and unified disinfection is needed, and equipment special for centralized and unified sterilization and disinfection of a central air-conditioning fresh air system is urgently needed.

In recent years, China has developed a lot of research works on air sterilization and disinfection, and the air sterilization methods are various in technology. The traditional physical and chemical disinfection is easy to generate secondary air pollution and certain toxic and side effects. Although the chemical disinfectant, the ultraviolet ray and the ozone disinfection device can effectively kill the bacteria and the viruses, a certain disinfection time is required, and the bacteria and the viruses cannot be killed instantly; the ultraviolet lamp tube must directly irradiate the surface of the disinfection object, and only can carry out disinfection operation under the unmanned condition, otherwise, the ultraviolet rays seriously harm human bodies, particularly eyes. Therefore, it is also necessary to develop an instant and real-time sterilization and disinfection apparatus.

Plasma technology is a rapid and green sterilization technology, and is considered to be one of the most promising technologies. The plasma is a fourth state of the existence of substances except gas, liquid and solid states, and is a mixture formed by atoms, ions, electrons, free radical particles and the like under the action of high voltage through ionization. These ions and uncharged particles can release photons or the surfaces collide with each other during the transition from the excited state to the ground state, thereby causing a chemical reaction. The plasma discharge can generate different forms of physical and chemical reactions, and can generate some oxidizing particles, including active free radicals, oxidizing molecules, ultraviolet light and the like. In recent years, the use of plasma chemistry in the field of environmental protection has been rising, and has attracted the attention of researchers. Plasma sterilization mechanisms typically include the destruction of nucleic acids by ultraviolet light, bombardment of cells by charged particles and energetic electrons, electroporation of cells, reaction of reactive particles with biological macromolecules, oxidation of reactive oxygen species, and the like, as a result of multi-component interactions. However, the existing device for sterilizing and disinfecting by plasma discharge has small treatment capacity, cannot meet the requirement of industrial application, and has the defects of low power supply energy efficiency, weak carrying capacity of a power supply and the like because a high-frequency alternating current power supply is utilized to cause a discharge reactor to generate heat seriously.

Disclosure of Invention

In order to solve the problems existing in the air sterilization and disinfection of the central air-conditioning ventilation system, the invention provides the device for deeply sterilizing and disinfecting the air of the central air-conditioning ventilation system with high efficiency, simplicity and no secondary pollution.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides plasma air sterilization and disinfection equipment, which comprises a plasma generating device and a nanosecond high-voltage pulse power supply; the plasma generating device is arranged in an air outlet pipeline and comprises a high-voltage electrode connected with the high-voltage end of the nanosecond high-voltage pulse power supply, a medium layer sleeved outside the high-voltage electrode and a low-voltage electrode connected with the low-voltage end of the nanosecond high-voltage pulse power supply, and the low-voltage electrode is arranged outside the medium layer; the nanosecond high-voltage pulse provided by the nanosecond high-voltage pulse power supply can enable dielectric barrier creeping discharge to be generated between the low-voltage electrode and the dielectric layer, and further generate plasma and ultraviolet light, wherein the plasma comprises active substances such as atoms, ions, electrons and free radical particles. The nanosecond high-voltage pulse power supply drives the plasma generating device to generate low-temperature plasma and ultraviolet light, and active substances such as atoms, ions, electrons, free radical particles and the like formed by the discharge plasma are used for sterilizing and disinfecting air containing bacteria and viruses, so that the aim of purifying the air is fulfilled.

Optionally, the plasma generating device is a fence structure reactor composed of an array of surface pulse discharge ceramic tubes. The fence structure reactor can be directly installed in the air outlet pipeline of the central air-conditioning ventilation system.

Optionally, in the reactor with the fence structure, the high-voltage electrode is a stud high-voltage electrode.

Optionally, a ceramic sleeve is sleeved on the outer layer of the stud high-voltage electrode to serve as the dielectric layer.

Optionally, a metal wire is wound outside the ceramic sleeve to form a metal wire wound low voltage electrode.

Optionally, the wire is helically wound around the wire of the low voltage electrode.

Optionally, the fence structure reactor comprises fixing supports, and the discharge ceramic tube array is fixed between the two fixing supports. The fixed bracket can be fixed in the air outlet pipeline of the ventilation system.

Optionally, the fixing support is a nylon fixing support.

Optionally, in the discharge ceramic tube array, the number of the array ceramic tubes is 4 × 5, and the distance between adjacent ceramic tubes is 30mm, so that an obstruction effect on air flow inside a pipeline of the ventilation system is not generated.

Compared with the prior art, the invention has the following technical effects:

according to the plasma air sterilization and disinfection equipment provided by the invention, the high-voltage electrode is connected with the high-voltage end of the nanosecond high-voltage pulse power supply, the low-voltage electrode is connected with the low-voltage end of the nanosecond high-voltage pulse power supply, and the nanosecond high-voltage pulse can enable a medium between the low-voltage electrode and the medium layer to generate dielectric barrier discharge to generate plasma and ultraviolet light. The plasma contains a large amount of high-energy electrons, active ions, high-energy free radicals and other components, which are extremely easy to chemically react with proteins and nucleic acids in bacteria, molds, spores and viruses, can destroy microorganisms and disturb the survival function of the microorganisms, so that various microorganisms die, and negative ions can adsorb suspended particles which are dozens of times of the weight of the negative ions, so that suspended colloids (aerosol) in air are removed, and the comprehensive effects of the damage of ultraviolet light to the nucleic acids, the bombardment of charged particles and high-energy electrons to cells, the electroporation of the cells, the reaction of the active particles and biomacromolecules, the oxidation of active oxygen and the like can achieve the effect of purifying and disinfecting air.

The plasma reactor with the fence structure can be directly connected with an air outlet pipeline of a central air-conditioning ventilation system, fresh air from the fresh air pipeline passes through the fence structure formed by the surface pulse discharge ceramic tube arrays, and plasma and ultraviolet light generated by the discharge ceramic tube arrays are sterilized and disinfected and then are sent into the air outlet pipeline by the air feeder and output. The invention fully utilizes the pipeline of the existing central air-conditioning ventilation system, and has the advantages of small engineering change, compact equipment structure and strong practicability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a plasma generating device in the plasma air sterilization and disinfection apparatus of the present invention;

FIG. 2 is a top view of the plasma generating apparatus of FIG. 1;

FIG. 3 is a schematic view of the installation of the plasma air sterilizer of the present invention in a central air conditioner;

wherein the reference numerals are: 1. a plasma generating device; 2. a nanosecond high-voltage pulse power supply; 3. stud high-voltage electrodes; 4. a ceramic bushing; 5. winding a low-voltage electrode by using a metal wire; 6. fixing a bracket; 7. a fresh air pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide plasma air sterilization and disinfection equipment, wherein a nanosecond high-voltage pulse power supply is adopted as the power supply, and plasma formed by ionization and formed by atoms, ions, electrons, free radical particles and the like has large energy and high concentration, so that the sterilization and disinfection rate of air containing bacteria and viruses is accelerated; the plasma generating device generates less heat in the continuous operation process, the power supply energy efficiency is high, and the cost of sterilization and disinfection is effectively reduced.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.