CN112197393A - Plasma indoor air purification device - Google Patents
Plasma indoor air purification device Download PDFInfo
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- CN112197393A CN112197393A CN202010896418.0A CN202010896418A CN112197393A CN 112197393 A CN112197393 A CN 112197393A CN 202010896418 A CN202010896418 A CN 202010896418A CN 112197393 A CN112197393 A CN 112197393A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
Abstract
The invention discloses a plasma indoor air purification device which comprises a ventilated box body, wherein the inner wall of the box body is sequentially connected with an air compressing fan, a particle filtering module, a plasma generating module, a catalytic reaction module and an ozone removing module from an air inlet end to an air outlet end, and the plasma generating module is sequentially connected with a control module and a power supply module. The formaldehyde in the air flowing through the air duct of the purifier is effectively removed, and the defects of performance attenuation and low formaldehyde removal efficiency of long-time use of the traditional negative ion air purifier and the filter screen type air purifier are overcome. The mechanism for treating the formaldehyde gas by the plasma technology provided by the invention is that electrons directly collide with formaldehyde molecules to be decomposed, and chemical oxidation reaction parts occur between active groups generated in an electric field and the formaldehyde molecules, so that the obtained product is harmless, can be directly discharged, and cannot cause the problem of secondary pollution.
Description
Technical Field
The invention belongs to the technical field of air purification equipment, and particularly relates to a plasma indoor air purification device.
Background
At present, the air purifier on the market mainly adopts a filter screen type and an anion type, and the filter screen type air purifier is developed in 20 years at home, so that the technology is mature and the performance tends to be stable. However, the filter screen type air purifier adopting the 'fan + filter screen' purification mode cannot efficiently remove decoration pollutants such as formaldehyde. The filter screen type air purifier is used for removing formaldehyde through an active carbon filter screen, and harmful gases such as formaldehyde are adsorbed and collected by utilizing the pore structure of active carbon. This technique has the following problems: (1) the activated carbon filter screen can only collect harmful gases such as formaldehyde and the like, but can not eliminate the harmful gases; (2) the adsorption capacity of the activated carbon is limited, and the adsorbed formaldehyde is easily discharged back to the room to cause secondary pollution along with the saturation of the activated carbon and the rise of the temperature. Therefore, although the traditional filter screen type air purifier can adsorb certain formaldehyde, the capacity of the traditional filter screen type air purifier is limited.
The anion air purifier is a new product in recent years, and is favored by a plurality of consumers by virtue of excellent formaldehyde purification effect. The negative ion air purifier uses the air negative ions as the electron beams of the active carrier to irradiate harmful gases such as formaldehyde and the like, and can degrade the harmful substances such as formaldehyde and the like into harmless substances such as carbon dioxide, water and the like, thereby thoroughly eliminating the harm of the formaldehyde to human bodies. The application numbers are: CN201410605683.3, publication no: CN104332829A, patent name: the ecological anion machine with active air purification and pollutant collection functions adopts a plurality of technologies such as an ecological anion generation technology with an anion system and a pollutant collection system, an ecological anion generation chip technology, a nano fullerene anion releaser technology and the like to generate anions with the characteristics of high activity, long natural diffusion distance and the like, and can be started for 24 hours to remove formaldehyde for a long time and a long time. Through the inspection of the quality supervision and inspection center of national indoor environment and indoor environment-friendly products, the 24-hour removal rate of the TVOC (transient volatile organic compound) pollutant in indoor air by the air purifier product manufactured by the technology is 81 percent.
From the aspect of formaldehyde purification effect, the effect of the anion air purifier is much better than that of a filter screen type air purifier, but the purification efficiency is still low, and the requirement of efficiently removing harmful substances in indoor air at present is difficult to meet.
Disclosure of Invention
The invention aims to provide a plasma indoor air purification device, which overcomes the defects of performance attenuation and low formaldehyde removal efficiency of the traditional negative ion air purifier and filter screen type air purifier in long-time use.
The technical scheme adopted by the invention is that the plasma indoor air purification device comprises a ventilated box body, wherein the inner wall of the box body is sequentially connected with an air compressing fan, a particle filtering module, a plasma generating module, a catalytic reaction module and an ozone removing module from an air inlet end to an air outlet end, and the plasma generating module is sequentially connected with a control module and a power supply module.
The invention is also characterized in that:
the plasma generation module comprises an insulating plate, a plasma channel is formed in the insulating plate, two opposite side faces of the insulating plate are respectively connected with a positive plate and a negative plate, the positive plate and the negative plate are identical in structure, and electrode holes which are identical in size with the insulating plate along the plasma channel are formed.
The thickness of the insulating plate along the direction of the plasma channel is 2-10mm, and the insulating plate is made of polyimide.
The catalytic reaction module is a panel structure with a plurality of carrier holes uniformly arranged on the surface, and 90-100 μm formaldehyde catalytic reactant is attached to the surface of the panel structure by a steam condensation method.
The formaldehyde catalytic reactant is TiO2Or MnO2。
The distance between the plasma generation module and the catalytic reaction module is 1-5 mm.
The ozone removing module is an activated carbon layer with the thickness of 5-20 cm.
The side wall of the box body is provided with a plurality of clamping grooves, and the particle filtering module, the plasma generating module and the catalytic reaction module are connected to the box body through the clamping grooves; the air compressing fan is connected with the box body through a screw, and the ozone removing module is connected with the box body through a screw.
The power module comprises an alternating current commercial power supply connected with commercial power, the output end of the alternating current commercial power supply is connected with a switch, the output end of the switch is respectively connected with the input end of an alternating current sine high-voltage generator and the input end of a conversion power supply, the output end of the alternating current sine high-voltage generator is connected with the anode of the plasma generation module, the output end of the conversion power supply is connected with a high-voltage nanosecond pulse power supply, the output end of the high-voltage nanosecond pulse power supply is connected with the cathode of the plasma generation module, and.
The control module comprises a timing control panel and an indicator lamp working panel which are sequentially connected with the switching power supply.
The plasma indoor air purification device has the beneficial effects that:
according to the technology and the device for purifying indoor air based on the plasma, strong oxidation active particles (ozone) and efficient catalytic reaction are combined together through the particle filtering module, the plasma generating module, the catalytic reaction module and the ozone removing module, formaldehyde in air flowing through an air duct of a purifier is effectively removed, and the defects that the performance of a traditional negative ion air purifier and a traditional mesh type filtering air purifier is attenuated after being used for a long time and the formaldehyde removing efficiency is low are overcome.
The mechanism for treating the formaldehyde gas by the plasma technology provided by the invention is that electrons directly collide with formaldehyde molecules to be decomposed, and chemical oxidation reaction parts occur between active groups generated in an electric field and the formaldehyde molecules, so that the obtained product is harmless, can be directly discharged, and cannot cause the problem of secondary pollution.
Drawings
FIG. 1 is a schematic structural diagram of a plasma indoor air purification device according to the present invention;
FIG. 2 is a schematic diagram of a power module according to the present invention;
FIG. 3 is a waveform diagram of an AC high voltage power supply as shown by the AC sinusoidal high voltage generator;
FIG. 4 is a graph of the voltage waveform of a high voltage nanosecond pulsed power supply; (ii) a
FIG. 5 is a graph of an AC sinusoidal high voltage generator voltage waveform with duty cycle;
fig. 6 is a diagram of a nanosecond pulsed power supply voltage waveform with a duty cycle.
In the figure, 1, an alternating current commercial power supply, 2, a switch, 3, an alternating current sine high voltage generator, 4, a conversion power supply, 5, a timing control board, 6, an indicator lamp working panel, 7, a high-voltage nanosecond pulse power supply, 8, a plasma generating module, 9, a gas compressing fan, 10, a particle filtering module, 11, a box body, 12, a catalytic reaction module and 13, an ozone removing module are arranged.
Detailed description of the preferred embodiments
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention adopts a plasma indoor air purification device, as shown in figure 1, comprising a box body 11 capable of ventilating, wherein the inner wall of the box body 11 is sequentially connected with an air compressing fan 9, a particle filtering module 10, a plasma generating module 8, a catalytic reaction module 12 and an ozone removing module 13 from an air inlet end to an air outlet end, and the plasma generating module 8 is sequentially connected with a control module and a power supply module.
The plasma generation module 8 comprises an insulating plate, a plasma channel is formed in the insulating plate, two opposite side faces of the insulating plate are respectively connected with a positive plate and a negative plate, the positive plate and the negative plate are identical in structure, and electrode holes which are identical in size with the insulating plate along the plasma channel are formed.
The thickness of the insulating plate along the direction of the plasma channel is 2-10mm, and the insulating plate is made of polyimide.
The catalytic reaction module 12 is a panel structure with a plurality of carrier holes uniformly formed on the surface, and 90-100 μm formaldehyde catalytic reactant is attached to the surface of the panel structure by a steam condensation method.
The formaldehyde catalytic reactant is TiO2Or MnO2。
The distance between the plasma generation module 8 and the catalytic reaction module 12 is 1-5 mm.
The ozone removal module 13 is an activated carbon layer having a thickness of 5-20 cm.
The side wall of the box body 11 is provided with a plurality of clamping grooves, and the particle filtering module 10, the plasma generating module 8 and the catalytic reaction module 12 are connected to the box body 11 through the clamping grooves; the air compressing fan 9 is connected with the box body 11 through screws, and the ozone removing module 13 is connected with the box body 11 through screws.
As shown in fig. 2, the power module includes an ac mains supply 1 connected to the mains supply, an output end of the ac mains supply 1 is connected to a switch 2, an output end of the switch 2 is respectively connected to an input end of an ac sinusoidal high voltage generator 3 and an input end of a switching power supply 4, an output end of the ac sinusoidal high voltage generator 3 is connected to a positive electrode of a plasma generation module 8, an output end of the switching power supply 4 is connected to a high-voltage nanosecond pulse power supply 7, an output end of the high-voltage nanosecond pulse power supply 7 is connected to a negative electrode of the plasma generation module 8, and the ac mains supply.
The control module comprises a timing control board 5 and an indicator lamp working panel 6 which are sequentially connected with a conversion power supply 4.
The plasma indoor air purification device has the following functions:
the plasma excitation module 8 comprises two positive and negative electrode plates with the same structure, rectangular or other holes with the width of 2-10mm and the length of 30-200 mm are arranged in the plates, the positive electrode plates and the negative electrode plates are parallel, a plasma channel is formed between the positive electrode plates and the negative electrode plates, and a uniform plasma area can be formed in the whole plate. The distance between the positive plate and the negative plate is determined by 8-2 insulating plates and excitation voltage, the value range of the excitation voltage is 3-15kV, and the value range of the distance between the two plates is 2-10 mm. High-energy radicals, high-energy free electrons, ozone, formaldehyde and other harmful substances are uniformly distributed in the plasma excitation module 8 and can be fully oxidized and decomposed when passing through the module 8, so that the effect of purifying air is achieved.
Compressed air fan 9 can absorb indoor contaminated air, and the air efficient that will include the toxic gas is impressed inside the clarifier, improves the work efficiency of clarifier.
The main function of the particle filter module 10 is to filter dust particles in the air, and has two main functions: (1) filtering dust particles in the air, and primarily purifying the air; (2) dust particles in the filtered air are prevented from being enriched on a discharge electrode plate of the plasma excitation module to influence the discharge efficiency.
The catalytic reaction module 12 is catalyzed by plasma discharge, and TiO on the surface of the catalytic reaction module2Or MnO2And other catalysts which can remove formaldehyde and ozone through catalytic reaction, further efficiently remove formaldehyde, preliminarily remove ozone and avoid secondary pollution generated by ozone.
The ozone removing module 13 can efficiently remove ozone, and in order to facilitate replacement of activated carbon and reduction of wind resistance, the vent holes formed in the plate of the ozone removing module 13 are large, and the specific size is a rectangle with a width of 10mm-30mm and a length of 50mm-300mm or other holes capable of achieving the same effect. The distance between adjacent holes is 2-20mm, and the holes are uniformly distributed on the whole plate. And the ozone removing module is an activated carbon layer with the thickness of 5-20 cm.
The invention discloses a plasma indoor air purification device, and provides a pulse-alternating current combined nanosecond pulse discharge generation method with low voltage, low power and low electromagnetic interference, which comprises the following steps:
step 1: the alternating current commercial power supply 1 is switched on, and the equipment is electrified;
step 2: the switch 2 is closed, and the output signal of the alternating current commercial power supply 1 enters the alternating current sine high-voltage generator 3 and the conversion power supply 4 through the switch 2;
and step 3: the voltage signal output by the switch 2 enters the alternating current high voltage generator 3 and is converted into a high voltage alternating current signal;
and 4, step 4: after a 5V voltage signal output by the conversion power supply 4 enters a micro nanosecond pulse signal generator 7, the voltage signal is rectified into a nanosecond pulse signal;
and 5: after the nanosecond pulse signal output by the micro nanosecond pulse signal generator 7 reaches a negative plate of the plasma module 8 and the high-voltage alternating current signal output by the alternating current high-voltage generator 3 reaches a positive plate of the plasma module 8, high-voltage electric fields generated by the two plates are superposed to reach a plasma ionization threshold value, so that nanosecond pulse discharge is initiated;
step 6: the overall discharge intensity and frequency of the dielectric barrier discharge can be controlled by phase modulating the output voltage amplitude, frequency and duty cycle of the nanosecond pulse signal generator 7 and the alternating current sine high voltage generator 3.
Fig. 3, 4, 5 and 6 are waveforms of voltages during the operation of the devices in the two plasma modules 8.
As can be seen from the comparison between fig. 3 and fig. 4, the combination of the ac sinusoidal high voltage power supply and the pulse power supply can achieve the same discharge intensity, and the power module provided by the present invention has lower energy consumption.
As can be seen from comparison between fig. 5 and fig. 6, the duty ratio of the power module of the present invention is adjustable according to the noise requirement, and the higher the duty ratio is, the lower the noise is and the lower the energy consumption is, but the duty ratio is adjusted on the premise of ensuring the air purification efficiency.
Example 1
The utility model provides a technique and device based on plasma purifies room air, is including the box 14 that can ventilate, 14 inner walls of box connect gradually by the inlet end to the end of giving vent to anger and compress air fan 9, particle filtration module 10, plasma generation module 8, catalytic reaction module 12, ozone and get rid of module 13, compress air fan 9, plasma generation module 8 all connects power module. As shown in fig. 3, the plasma generation module 8 is formed by opening rectangular holes with a width of 10mm and a length of 150mm in the positive plate and the negative plate, respectively transiting the upper side and the lower side of each hole by a semicircle with a diameter of 10mm, uniformly distributing the holes in the positive plate and the negative plate, wherein the distance between adjacent holes is 5mm, the positive plate and the negative plate are made of 7075 aluminum alloy, the positive plate and the negative plate are arranged in parallel, and a plasma channel is formed between the positive plate and the negative plate; the middle insulating plate is 5mm thick, the material is polyimide, the excitation voltage applied by the plasma generation module is 10kV, and the ozone removal module 13 is an activated carbon layer with the thickness of 15 cm.
According to a GB/T18801_2015 detection method, the device is placed in an experimental space with the space of 30 cubic meters, sampling is carried out before the device operates, sampling is carried out after the device operates for 60min, and the formaldehyde removal rate is 90.50% after the device operates for 60min according to a calculation method that the concentration obtained by subtracting the concentration obtained by the second sampling from the first sampling is divided by the initial concentration and multiplied by 100.
Example 2
The utility model provides a technique and device based on plasma purifies room air, is including the box 14 that can ventilate, 14 inner walls of box connect gradually by the inlet end to the end of giving vent to anger and compress air fan 9, particle filtration module 10, plasma generation module 8, catalytic reaction module 12, ozone and get rid of module 13, compress air fan 9, plasma generation module 8 all connects power module. As shown in fig. 3, the plasma generation module 8 is formed by opening rectangular holes with a width of 10mm and a length of 150mm in the positive plate and the negative plate, respectively transiting the upper side and the lower side of each hole by a semicircle with a diameter of 10mm, uniformly distributing the holes in the positive plate and the negative plate, wherein the distance between adjacent holes is 5mm, the positive plate and the negative plate are made of 7075 aluminum alloy, the positive plate and the negative plate are arranged in parallel, and a plasma channel is formed between the positive plate and the negative plate; the middle insulating plate is 5mm thick, the material is polyimide, the excitation voltage applied by the plasma generation module is 10kV, and the ozone removal module 13 is an activated carbon layer with the thickness of 15 cm.
According to a GB/T18801_2015 detection method, the device is placed in an experimental space with the space of 30 cubic meters, sampling is carried out before the device operates, sampling is carried out after the device operates for 60min, and the removal rate of toluene is 98.5% after the device operates for 60min according to a calculation method that the concentration obtained by subtracting the concentration obtained by the second sampling from the concentration obtained by the first sampling is divided by the initial concentration and multiplied by 100.
Example 3
The utility model provides a technique and device based on plasma purifies room air, is including the box 14 that can ventilate, 14 inner walls of box connect gradually by the inlet end to the end of giving vent to anger and compress air fan 9, particle filtration module 10, plasma generation module 8, catalytic reaction module 12, ozone and get rid of module 13, compress air fan 9, plasma generation module 8 all connects power module. As shown in fig. 3, the plasma generation module 8 is formed by opening rectangular holes with a width of 10mm and a length of 150mm in the positive plate and the negative plate, respectively transiting the upper side and the lower side of each hole by a semicircle with a diameter of 10mm, uniformly distributing the holes in the positive plate and the negative plate, wherein the distance between adjacent holes is 5mm, the positive plate and the negative plate are made of 7075 aluminum alloy, the positive plate and the negative plate are arranged in parallel, and a plasma channel is formed between the positive plate and the negative plate; the middle insulating plate is 5mm thick, the material is polyimide, the excitation voltage applied by the plasma generation module is 10kV, and the ozone removal module 13 is an activated carbon layer with the thickness of 15 cm.
According to a GB/T18801_2015 detection method, the device is placed in an experimental space with the space of 30 cubic meters, sampling is carried out before the device operates, sampling is carried out after the device operates for 60min, and the removal rate of tvoc is 98.1% after the device operates for 60min according to a calculation method that the concentration obtained by subtracting the concentration obtained by the second sampling from the concentration obtained by the first sampling is divided by the initial concentration and multiplied by 100.
According to the above embodiments, from the final result of purifying formaldehyde, toluene and tvoc, the formaldehyde removal rate of the plasma indoor air purification device of the invention can reach 90.5% at the lowest in half an hour, the plasma indoor air purification device is started up by adopting the negative ion technology for 24 hours, the removal rate is 81%, and the air purification efficiency of the plasma indoor air purification device of the invention is far higher than that of the negative ion air purifier and the filter screen type air purifier.
Claims (10)
1. The utility model provides an indoor air purification device of plasma, its characterized in that, is including box (11) that can ventilate, box (11) inner wall is connected gradually by the inlet end to the end of giving vent to anger and is pressed fan (9), particle filtration module (10), plasma generation module (8), catalytic reaction module (12), ozone and get rid of module (13), plasma generation module (8) connect gradually control module, power module.
2. A plasma indoor air cleaning apparatus according to claim 1, wherein the plasma generating module (8) comprises an insulating plate on which a plasma channel is formed, and two opposite sides of the insulating plate are connected to a positive electrode plate and a negative electrode plate, respectively, the positive electrode plate and the negative electrode plate having the same structure and having an electrode hole of the same size as the insulating plate along the plasma channel.
3. A plasma indoor air cleaning apparatus according to claim 1, wherein the thickness of the insulating plate in the plasma passage direction is 2 to 10mm, and the insulating plate is made of polyimide.
4. A plasma indoor air purification apparatus as claimed in claim 1, wherein the catalytic reaction module (12) is a panel structure with a plurality of carrier holes uniformly opened on the surface, and 90-100 μm formaldehyde catalytic reactant is attached on the surface of the panel structure by a vapor condensation method.
5. A plasma indoor air purification apparatus as claimed in claim 4, wherein the formaldehyde catalytic reactant is TiO2Or MnO2。
6. A plasma indoor air cleaning apparatus according to claim 1, wherein the distance between the plasma generating module (8) and the catalytic reaction module (12) is 1-5 mm.
7. A plasma indoor air cleaning apparatus according to claim 1, wherein the ozone removing module (13) is an activated carbon layer having a thickness of 5-20 cm.
8. A plasma indoor air purification device according to claim 1, wherein a plurality of clamping grooves are formed in the side wall of the box body (11), and the particle filtering module (10), the plasma generating module (8) and the catalytic reaction module (12) are connected to the box body (11) through the clamping grooves; compressed air fan (9) pass through screw connection box (11), ozone is got rid of module (13) and is passed through screw connection box (11).
9. The indoor air purification device of plasma of claim 1, characterized in that, the power module is including the alternating current mains supply (1) of connecting the commercial power, switch (2) is connected to alternating current mains supply (1) output, alternating current sinusoidal high voltage generator (3) input and switching power supply (4) input are connected respectively to switch (2) output, the positive pole of plasma generation module (8) is connected to alternating current sinusoidal high voltage generator (3) output, high-pressure nanosecond pulse power supply (7) is connected to switching power supply (4) output, the negative pole of plasma generation module (8) is connected to the output of high-pressure nanosecond pulse power supply (7), alternating current mains supply (1) is connected with compressor fan (9).
10. A plasma indoor air cleaning device according to claim 9, wherein the control module comprises a timing control board (5) and an indicator lamp working panel (6) which are connected with the conversion power supply (4) in turn.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113701295A (en) * | 2021-07-13 | 2021-11-26 | 张翔宇 | Air purification equipment and air purification method |
| CN113976321A (en) * | 2021-10-08 | 2022-01-28 | 佛山市顺德区阿波罗环保器材有限公司 | Method, device, equipment, storage medium and product for compensating working performance of filter screen |
| CN114060958A (en) * | 2021-11-23 | 2022-02-18 | 西安空天紫电等离子体技术有限公司 | Plasma air disinfection and sterilization device special for combined air conditioning unit |
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