CN111420109A - Electromagnetic pulse synergistic plasma efficient air purification and disinfection equipment - Google Patents
Electromagnetic pulse synergistic plasma efficient air purification and disinfection equipment Download PDFInfo
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- CN111420109A CN111420109A CN202010133082.2A CN202010133082A CN111420109A CN 111420109 A CN111420109 A CN 111420109A CN 202010133082 A CN202010133082 A CN 202010133082A CN 111420109 A CN111420109 A CN 111420109A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/22—Ionisation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/11—Apparatus for controlling air treatment
Abstract
The invention provides an electromagnetic pulse synergistic plasma efficient air purification and disinfection device which mainly comprises a disinfection device shell, an air inlet fan, a high-frequency pulse plasma excitation source, a high-frequency pulse generator, a plasma air purification and disinfection reactor, a pulse electric field air purification and disinfection reactor and an exhaust fan. The invention enhances the inactivation efficiency of viruses and bacteria, and realizes effective killing of various pathogens such as viruses, bacteria, spores and the like in droplets and aerosol by combining an air circulation system.
Description
Technical Field
The invention relates to the field of air purification and disinfection, in particular to an electromagnetic pulse synergistic plasma efficient air purification and disinfection device.
Background
Bacteria, viruses and the like exist in vitro for a long time, and most of the bacteria, the viruses and the like can be spread in the air in modes of respiratory tract spray, aerosol and the like, so that great potential safety hazards are caused. Particularly, the main transmission path of the novel coronavirus is air transmission through respiratory droplets, aerosols and the like, and the spread of the virus cannot be ensured as much as possible unless the transmission path is cut off.
Disclosure of Invention
The present invention is directed to solving the problems of the prior art.
The invention provides an electromagnetic pulse synergistic plasma efficient air purification and disinfection device which mainly comprises a disinfection device shell, an air inlet fan, a high-frequency pulse plasma excitation source, a high-frequency pulse generator, a plasma air purification and disinfection reactor, a pulse electric field air purification and disinfection reactor and an exhaust fan.
The outer wall of the disinfection equipment shell is respectively provided with an air inlet and an air outlet. The disinfection equipment shell is internally provided with 2 communicated cavities which are respectively marked as a plasma reaction cavity and a pulse electric field reaction cavity. And air in the plasma reaction cavity and the pulsed electric field reaction cavity are communicated with each other.
The air inlet fan is embedded in the air inlet. The air inlet fan sends external ambient air into the shell of the disinfection equipment.
The high-frequency pulse plasma excitation source and the high-frequency pulse generator are packaged in the shell of the disinfection equipment and are respectively connected with the electrodes of the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor through electrode leads, so that pulses with adjustable parameters are output to the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor, and the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor are controlled to work.
The pulse parameters output by the high-frequency pulse plasma excitation source and the high-frequency high-intensity pulse generator are as follows: the pulse amplitude range is [ -20kV, +20KV ], the pulse width range is [200ns, 10 mus ], the frequency range is [1Hz, 10kHz ], the pulse rising edge is less than 50ns, and the pulse falling edge is less than 200 ns. The pulse parameter value is adjusted according to the physical and chemical characteristic of pathogen inactivation.
The plasma air purification and disinfection reactor comprises a plurality of electrodes which are arranged in a plasma reaction cavity in a clearance mode. The gap between every two adjacent electrodes forms a plasma reaction channel. The surface of the electrode is coated with a barrier insulating medium.
After the plasma air purification and disinfection reactor receives the pulse sent by the high-frequency pulse plasma excitation source, the electrode discharges, so that plasma is generated in the plasma reaction channel, and the inactivation of pathogens in the air in the plasma reaction cavity is completed. The electrode discharge manner includes, but is not limited to, a DBD discharge manner and a jet discharge manner.
The plasma air purification and disinfection reactor at least comprises electrode pairs symmetrically attached to the opposite inner surfaces of the plasma reaction cavity 2.
The blocking insulating medium is an insulating medium.
The pulse electric field air purification and disinfection reactor comprises electrode pairs which are symmetrically arranged in a pulse electric field reaction cavity.
After the pulse generator receives the pulse sent by the high-frequency pulse generator, the pulse electric field is formed between the electrode pairs, and the inactivation of pathogens in the air in the pulse electric field reaction cavity is completed. The strength range of the formed pulse electric field is [0, 20KV/cm ].
Conductive burrs are coated on two opposite surfaces of the electrode pair so as to enhance the intensity of pulse electric field formed by the electrode pair.
The conductive burrs are carbon nanotubes.
The electrode pairs are symmetrically attached to 2 opposite inner surfaces of the pulse electric field reaction cavity.
The electrodes and electrode pairs are primarily flat electrodes, needle electrodes and/or circular electrodes.
The exhaust fan is embedded in the air outlet and exhausts the air in the plasma reaction cavity and/or the pulse electric field reaction cavity to the external environment.
It is worth to be noted that the charged particles and active substances generated by the plasma have the functions of etching the surface envelope of the pathogenic bacteria, oxidizing proteins of the pathogenic bacteria, improving the electrical parameters of the air and the like, thereby being beneficial to the targeting action of the pulse electric field on the pathogens; the high-intensity pulse electric field can induce pathogen to generate irreversible electroporation, break the physiological balance of the pathogen, further promote active substances of the plasma to enter the pathogen and damage the internal structure of the pathogen. Therefore, the plasma and the pathogen inactivation biomedical effect caused by the pulse electric field can be mutually superposed and synergistically enhanced, so that the germ content in the space can be rapidly and efficiently greatly reduced, and the life health of people can be greatly protected.
The invention has the advantages that pathogens such as respiratory tract flying foam, aerosol novel coronavirus, bacteria, spores and the like can be effectively inactivated, so that the severe situation that the novel coronavirus is frequently spread can be effectively dealt with, and powerful protection is provided for medical care personnel, the common people and the like. The invention combines the 'cocktail' type of plasma and the pathogen inactivation principle of irreversible electroporation of the pulse electric field, enhances the inactivation efficiency of virus and bacteria, realizes the effective killing of various pathogens such as virus (including novel coronavirus), bacteria, spores and the like in droplets and aerosol by combining an air circulation system, and provides an effective disinfection means for sickrooms, building air conditioners, fresh air systems and the like.
Drawings
FIG. 1 is a schematic view of an electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection device;
FIG. 2 is a schematic view of a plasma reaction chamber;
FIG. 3 is a schematic view of a pulsed electric field reaction chamber;
FIG. 4 is an equivalent circuit of a dielectric barrier discharge form;
FIG. 5 is a voltage waveform during simulated plasma discharge;
FIG. 6 is a current waveform during plasma discharge simulation;
FIG. 7 is a waveform of voltage and current during actual plasma discharge;
FIG. 8 is a finite element model of an annular ring structure electrode structure;
FIG. 9 is a finite element model of a needle ring structure electrode structure;
FIG. 10 is a high frequency pulsed plasma jet experimental platform;
FIG. 11 is a graph showing the effect of pulse amplitude on plasma generation;
FIG. 12 is a graph showing the effect of pulse width on plasma generation;
FIG. 13 is a graph showing the effect of pulse frequency on plasma generation;
FIG. 14 is a graph showing the effect of pulse rise and fall times on plasma generation;
FIG. 15 is a sample of the experiment after the pulsed electric field has killed the yeast;
FIG. 16 shows the results of experiments for killing yeast by pulsed electric field;
FIG. 17 is a graph of simulation of electric field strength for a process channel;
In the figure, air supply fan 1, electrode 201, barrier insulating medium 202, electrode pair 301, conductive burr 302 and exhaust fan 4.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various alterations and modifications can be made without departing from the technical idea of the invention, and all changes and modifications made by the ordinary technical knowledge and the conventional means in the field are intended to be included in the scope of the invention.
Example 1:
Referring to fig. 1 to 4, the electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection device mainly comprises a disinfection device shell, an air inlet fan 1, a high-frequency pulse plasma excitation source, a high-frequency pulse generator, a plasma air purification and disinfection reactor, a pulse electric field air purification and disinfection reactor and an exhaust fan 4.
The outer wall of the disinfection equipment shell is respectively provided with an air inlet and an air outlet. The disinfection equipment shell is internally provided with 2 communicated cavities which are respectively marked as a plasma reaction cavity and a pulse electric field reaction cavity. And air in the plasma reaction cavity and the pulsed electric field reaction cavity are communicated with each other.
The air inlet fan 1 is embedded in the air inlet. The air supply fan 1 supplies outside ambient air into the housing of the disinfection apparatus.
The high-frequency pulse plasma excitation source and the high-frequency pulse generator are packaged in the shell of the disinfection equipment and are respectively connected with the electrodes of the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor through electrode leads, so that pulses with adjustable parameters are output to the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor, and the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor are controlled to work.
The pulse parameters output by the high-frequency pulse plasma excitation source and the high-frequency high-intensity pulse generator are as follows: the pulse amplitude range is [ -20kV, +20KV ], the pulse width range is [200ns, 10 mus ], the frequency range is [1Hz, 10kHz ], the pulse rising edge is less than 50ns, and the pulse falling edge is less than 200 ns. The pulse parameter value is adjustable and is mainly determined by the physicochemical characteristic characteristics of bacteria and virus inactivation.
The plasma air purification and disinfection reactor comprises a plurality of electrodes 201 which are arranged in a plasma reaction cavity in a clearance mode. The gap between every two adjacent electrodes 201 forms a plasma reaction channel. The surface of the electrode 201 is coated with a barrier insulating medium 202. A screen-mesh design with multiple layers of electrodes can enhance the flat field strength.
After the plasma air purification and disinfection reactor receives the pulse sent by the high-frequency pulse plasma excitation source, the electrode 201 performs dielectric barrier discharge or jet discharge, so that plasma is generated in the plasma reaction channel, and the inactivation of pathogens in the air in the plasma reaction cavity is completed.
The dielectric barrier discharge structurally comprises an electrode and a dielectric inserted into or wrapped on the surface of the electrode, and the equivalent capacitance changes before and after breakdown, so that an equivalent circuit diagram of the plasma discharge device is established as shown in fig. 1, and then an equivalent circuit model of the jet device is established through a Simulink module in Matlab as shown in fig. 2.
The plasma air purification and disinfection reactor at least comprises electrode pairs symmetrically attached to the opposite inner surfaces of the plasma reaction cavity 2.
The blocking insulating dielectric 202 is an insulating dielectric including glass and ceramic.
The pulse electric field air purification and disinfection reactor comprises electrode pairs 301 which are symmetrically arranged in a pulse electric field reaction cavity.
After the pulse generator receives the pulse sent by the high-frequency pulse generator, the pulse electric field is formed between the electrode pairs 301, and the inactivation of pathogens in the air in the pulse electric field reaction cavity is completed. The strength range of the formed pulse electric field is [0, 20KV/cm ].
The pulse and/or plasma acts on the hospital body, so that irreversible electroporation, protein denaturation, outer membrane damage, DNA breakage and acid-base imbalance can occur.
The two opposite surfaces of the electrode pair 301 are coated with conductive burrs 302 to increase the intensity of the pulse electric field formed by the electrode pair 301.
The conductive burr 302 is a carbon nanotube.
The electrode pairs 301 are symmetrically attached to 2 opposite inner surfaces of the pulse electric field reaction cavity.
The exhaust fan 4 is embedded in the air outlet, and exhausts the air to the external environment after the plasma reaction cavity and/or the pulse electric field reaction cavity are disinfected.
Example 2:
The use method of the electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection equipment mainly comprises the following steps:
1) And electrifying the electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection equipment. The electromagnetic pulse and plasma cooperation high-efficiency air purification and disinfection equipment is provided with a control panel.
2) The pulse parameters are adjusted through the control panel.
3) The high-frequency pulse plasma device comprises a plasma air purification and disinfection reactor, a high-frequency pulse generator, a high-frequency pulse plasma device excitation source, a high-frequency pulse generator, a pulse electric field air purification and disinfection reactor, a gas inlet, a gas outlet, a gas.
4) The electrodes of the plasma air purification and disinfection reactor discharge to generate plasma gas between the adjacent 2 electrodes, and the plasma gas is filled in the whole plasma reaction cavity through air flow to disinfect the air in the cavity.
5) The electrodes of the pulse electric field air purification and disinfection reactor discharge electricity, and a pulse electric field is formed between every two adjacent electrodes to disinfect the air in the electric field.
6) The gas vent discharges the sterilized gas.
Example 3:
Referring to fig. 6 to 14, the plasma air purification and disinfection reactor discharge simulation experiment mainly includes the following steps:
1) the method comprises the steps of adopting COMSO L Multiphysics finite element simulation software to simulate discharge characteristics and factors influencing Jet flow, wherein a quartz tube with the length of 12cm, the tube diameter of 4cm, 5cm and 6cm is used in a simulation model, a three-way tube with an air inlet on the side surface is used, copper foil is wrapped on the surface of the quartz glass tube to serve as a ring electrode, and copper foil with the thickness of 0.1mm is wound for three circles, wherein the thickness is about 0.3 mm.
2) The plasma discharges and the current pulses create micro discharge channels. The micro-discharge phenomenon is generated in connection with the change of the equivalent capacitance before and after the reaction, which is related to the accumulation of the surface charge of the medium. After the first time of the positive half cycle reaches the breakdown voltage, plasma begins to be generated, active particles and excited gas molecules are accumulated on the surface of the charge, a reverse electric field is generated to reduce the voltage, at the moment, the gas is subjected to a plurality of extinguishing and discharging processes to generate current pulses, when the voltage reaches the negative half cycle, the breakdown voltage is reduced due to the action of the reverse electric field, so that the breakdown occurs earlier than the positive half cycle, and the phenomenon is called as a memory voltage effect.
3) the method mainly analyzes the potential distribution at the moment, the applied voltage is selected to be 5k V, the current path can reach 4.2 × 10^3V/cm near the axis in the middle of the ring gap, and can not reach enough field intensity required by air gas discharge, experiments and simulation prove that the ring structure can generate discharge only at the peak value of 20k V, the needle point curvature is large, the needle point curvature is in an extremely uneven electric field, the maximum field intensity is 9.1 × 10^4V/cm, and the air discharge can be caused to generate plasma by air breakdown.
4) Establishing a plasma jet device: an experiment platform of nanosecond pulse APNP-J is built by using a quartz glass tube as an insulating medium, as shown in FIG. 10, nanosecond pulse-driven plasma jet experiment research is carried out subsequently, the electrical characteristics of jet discharge are analyzed and measured, and the conduction current of the plasma jet is calculated.
Experimental results show that nanosecond pulses are used as discharge channels for generating plasma jet flow, the discharge channels are uniform, and the jet flow mainly comprises a bright inner core and a blue-violet tail. And the factors influencing the plasma jet characteristics are analyzed, and the influence of the pulse power supply parameters and the gas flow rate on the plasma jet length is respectively researched, as shown in fig. 11 to 14.
Example 4:
Referring to fig. 15 to 17, a pulsed electric field air purification and disinfection reactor sterilization simulation experiment mainly includes the following steps:
1) A simulation model of an electric field sterilization and disinfection treatment channel is established by adopting comsol software, and the electrode distance of the treatment channel is 3mm, the length is 10mm, and the width is 5 mm.
2) The experiment of killing yeast by pulse electric field was carried out as shown in FIG. 15. The experimental result is shown in fig. 16, the killing effect on bacteria is improved by more than 2 log levels; the results of experiments of pure electric field action and electric field synergistic 55 ℃ micro thermal field sterilization show that the thermal field has auxiliary action on sterilization.
The electric field simulation shows that the sterilization channel is 28mm 2Has a flow area of 25mm 2The above is the effective processing area. Completely meets the application requirements of sterilization and disinfection.
Claims (10)
1. Electromagnetic pulse cooperates high-efficient air purification disinfecting equipment of plasma, its characterized in that: mainly comprises a disinfection equipment shell, an air inlet fan (1), a high-frequency pulse plasma excitation source, a high-frequency pulse generator, a plasma air purification and disinfection reactor, a pulse electric field air purification and disinfection reactor and an exhaust fan (4).
The outer wall of the disinfection equipment shell is respectively provided with an air inlet and an air outlet; 2 communicated cavities are arranged in the shell of the disinfection equipment and are respectively marked as a plasma reaction cavity and a pulse electric field reaction cavity; the air in the plasma reaction cavity and the air in the pulse electric field reaction cavity are communicated with each other;
The air inlet fan (1) is embedded in the air inlet; the air inlet fan (1) sends external ambient air into the shell of the disinfection equipment;
The high-frequency pulse plasma excitation source and the high-frequency pulse generator are packaged in the shell of the disinfection equipment and are respectively connected with the electrodes of the plasma air purification and disinfection reactor and the pulsed electric field air purification and disinfection reactor through electrode leads;
The high-frequency pulse plasma excitation source and the high-frequency pulse generator output pulses with adjustable parameters to the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor through the electrode leads so as to control the plasma air purification and disinfection reactor and the pulse electric field air purification and disinfection reactor to work;
The plasma air purification and disinfection reactor comprises a plurality of electrodes (201) which are arranged in a plasma reaction cavity in a clearance mode; a gap between every two adjacent electrodes (201) forms a plasma reaction channel; the surface of the electrode (201) is coated with a barrier insulating medium (202);
After the plasma air purification and disinfection reactor receives the pulse sent by the high-frequency pulse plasma excitation source, the electrode (201) discharges, so that plasma is generated in the plasma reaction channel, and the inactivation of pathogens in the air in the plasma reaction cavity is completed through the plasma;
The pulse electric field air purification and disinfection reactor comprises electrode pairs (301) symmetrically arranged in a pulse electric field reaction cavity;
After the pulse electric field air purification and disinfection reactor receives the pulse sent by the high-frequency pulse generator, a pulse electric field is formed between the electrode pair (301) to complete the inactivation of pathogens in the air in the pulse electric field reaction cavity;
The exhaust fan (4) is embedded in the air outlet and exhausts the air in the plasma reaction cavity and/or the pulse electric field reaction cavity to the external environment.
2. An electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection device as claimed in claim 1 or 2, wherein the pulse parameters output by the high-frequency pulse plasma excitation source and the high-frequency high-intensity pulse generator are as follows: the pulse amplitude range is [ -20kV, +20KV ], the pulse width range is [200ns, 10 mus ], the frequency range is [1Hz, 10kHz ], the pulse rising edge is less than 50ns, and the pulse falling edge is less than 200 ns.
3. An electromagnetic pulse synergistic plasma high efficiency air purification and disinfection apparatus as claimed in claim 1 wherein the pulse parameter values are adjusted according to physicochemical characteristics of pathogen inactivation.
4. An electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection apparatus as claimed in claim 1, wherein said plasma air purification and disinfection reactor comprises at least an electrode pair symmetrically attached to the opposite inner surfaces of the plasma reaction chamber 2.
5. An electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection apparatus as claimed in claim 1, wherein two opposite surfaces of said electrode pair (301) are coated with conductive burrs (302) to enhance the intensity of the pulse electric field formed by said electrode pair (301).
6. The electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection apparatus as claimed in claim 5, wherein said conductive burrs (302) are carbon nanotubes.
7. The electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection equipment as claimed in claim 1, wherein said electrode pairs (301) are symmetrically attached to 2 opposite inner surfaces of the pulsed electric field reaction chamber.
8. An electromagnetic pulse synergistic plasma high efficiency air purification and disinfection apparatus as claimed in claim 1 wherein the pulsed electric field is formed in the range of [0, 20KV/cm ].
9. An electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection apparatus as claimed in claim 1, wherein: the electrode (201) discharge mode includes but is not limited to a DBD discharge mode and a jet discharge mode.
10. An electromagnetic pulse synergistic plasma high-efficiency air purification and disinfection apparatus as claimed in claim 1, wherein: the electrodes (201) and electrode pairs (301) are primarily flat plate electrodes, needle electrodes and/or circular electrodes.
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| CN112231959A (en) * | 2020-10-26 | 2021-01-15 | 安徽紫杉环境科技有限公司 | Plasma module manufacturing method and plasma module |
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