CN114459104A - Air purifying device - Google Patents
Air purifying device Download PDFInfo
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- CN114459104A CN114459104A CN202111670700.8A CN202111670700A CN114459104A CN 114459104 A CN114459104 A CN 114459104A CN 202111670700 A CN202111670700 A CN 202111670700A CN 114459104 A CN114459104 A CN 114459104A
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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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
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
- F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/24—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using sterilising media
- F24F8/26—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using sterilising media using ozone
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/80—Self-contained air purifiers
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/66—Volatile organic compounds [VOC]
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/74—Ozone
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention provides an air purification device. The air purification device adopts high-efficiency filtering equipment, an ozone generator, photocatalytic equipment and catalytic decomposition equipment with a heating device, is suitable for indoor air purification, is provided with formaldehyde and ozone detection equipment at an air inlet, and displays the formaldehyde concentration and the ozone concentration of indoor air in real time. In order to avoid the over-standard concentration of the indoor ozone, the controller is arranged, the ozone generator can be adjusted or closed, the ultraviolet irradiation intensity is increased or reduced based on the indoor ozone concentration and the formaldehyde concentration, and meanwhile, the heating device of the catalytic decomposition equipment can be adjusted, so that the decomposition rate of the ozone is effectively improved. Meanwhile, the air outlet is provided with formaldehyde and ozone detection equipment, the purification efficiency can be calculated according to formaldehyde detection data of the air inlet and the air outlet, and the ozone generation amount and the illumination intensity can be adjusted and whether the catalyst is inactivated or not can be judged based on the calculation.
Description
Technical Field
The invention relates to the field of air purification devices, in particular to an air purification device.
Background
More than about 85% of the time that modern people spend indoors, the public is concerned more and more about indoor air quality with the improvement of living standard. However, with the increasing abundance of indoor decoration, the organic matters released by various decoration materials are hundreds, and among various organic matters, formaldehyde is widely applied, is closely related to daily life clothes and eating and housing, has strong physiological toxicity, can cause various acute and chronic diseases, and is therefore of great public concern.
The problem of indoor air pollution caused by selecting raw materials with unqualified use quality in indoor decoration is becoming serious day by day, and formaldehyde is the most remarkable and seriously polluted gaseous pollutant in modern indoor air, is called as the first number killer of indoor decoration and has great harm to human health. At present, the situation that the indoor formaldehyde content of each city in China exceeds the standard is very serious, the concentration of formaldehyde mostly exceeds the national standard, and how to effectively remove the formaldehyde becomes urgent. Besides gaseous pollutants, various pollutants such as dust, bacteria, viruses and the like exist in indoor air, and cause practical or potential harm to human bodies.
At present, methods for removing indoor formaldehyde mainly comprise an air exchange method, a plant method, an adsorption method, a catalysis method and the like, good indoor ventilation can effectively reduce the concentration of formaldehyde in air, but formaldehyde release is a slow and uninterrupted process, the release time of formaldehyde is generally 3-15 years, and most of household ventilation times cannot meet the requirements during the use period of an air conditioner in winter and summer. The plant method is a method for carrying out catalytic biotransformation on harmful organic matters such as formaldehyde by utilizing plant photosynthesis, has the characteristics of environmental protection, attractiveness, simplicity in operation and the like, and has the defects of long purification period, great influence of environmental temperature, illumination and humidity, incapability of treating high-concentration indoor formaldehyde and the like. The adsorption method mainly utilizes the activated carbon to adsorb formaldehyde in the air, has the advantages of mature technology, safety, reliable effect and large purification total amount, can quickly and efficiently purify indoor formaldehyde pollutants, but the activated carbon is easy to saturate in adsorption and weak in persistent purification capacity, and needs to be replaced periodically. The catalytic method comprises ozone catalytic oxidation and photocatalytic oxidation, the half-life period of ozone in air is longer, the catalyst can accelerate the decomposition of ozone, and formaldehyde can be decomposed into CO by decomposing to generate oxidizing free radicals2And H2O, the ozone catalytic oxidation method can carry out high-efficiency oxidative degradation on various indoor organic compounds, has obvious effect and higher efficiency, is green and environment-friendly, but can generate secondary chemical pollution to the indoor environment if the concentration of ozone is too high. The photocatalysis method is to utilize photocatalysis under the irradiation of a light source with specific wavelengthCatalytic degradation of formaldehyde to CO by using agent2And H2O, less secondary pollution, sustainable purification and no need of regular replacement, but has the defects of low formaldehyde degradation efficiency and the like.
Therefore, there is a need to provide a new air purification device to solve the above problems.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
Aiming at the defects of the prior art, the invention provides an air purification device, which comprises an air inlet, first detection equipment, high-efficiency filtering equipment, an ozone generator, a fan, photocatalytic equipment, catalytic decomposition equipment, second detection equipment and an air outlet, wherein the first detection equipment comprises first formaldehyde detection equipment and first ozone detection equipment; the high-efficiency filtering equipment is used for filtering dust particles in the air; the ozone generator generates ozone by adopting a low-temperature plasma mode; the fan is used for discharging air from the air outlet after the air enters from the air inlet; the photocatalytic equipment comprises a photocatalytic filter screen and an ultraviolet light source and is used for decomposing formaldehyde and killing microorganisms in the air; the catalytic decomposition equipment is provided with a heating device and is used for reducing the concentration of ozone in the purified air; the second detection equipment comprises second formaldehyde detection equipment and second ozone detection equipment, and the second formaldehyde detection equipment and the second ozone detection equipment are located on two sides of the air outlet. In addition, the sequence of the photocatalytic equipment and the catalytic decomposition equipment which are arranged in sequence can be interchanged.
Optionally, the air purification device further comprises a controller, the controller is connected with the first detection device, the ozone generator, the photocatalytic device, the catalytic decomposition device and the second detection device, the controller is used for adjusting the ozone generation amount of the ozone generator and the ultraviolet light intensity of the photocatalytic device according to at least one of different scenes, different environmental requirements, different gears of the fan, the detection result of the first detection device and the detection result of the second detection device, and adjusting the heating device of the catalytic decomposition device simultaneously, so that the decomposition rate of ozone is effectively improved, the synergistic effect of ozone and photocatalysis is used for purifying air, and the formaldehyde and ozone concentration in indoor air are ensured to meet safety standards.
Optionally, the air purification apparatus further comprises a temperature sensor, the temperature sensor connecting the controller and the catalytic decomposition device.
Optionally, the filtration device employs a HEPA screen.
Optionally, the photocatalytic filter screen is a titanium dioxide photocatalytic filter screen.
Optionally, the catalytic decomposition device employs a manganese dioxide catalyst.
Optionally, the manganese dioxide catalyst is doped with Ag and/or Pt. Optionally, the ultraviolet light source comprises a 254nm microwave electrodeless ultraviolet light source.
Optionally, the ultraviolet light source further comprises a 185nm microwave electrodeless ultraviolet light source.
Optionally, the number of the photocatalytic filter screens is at least two, and the photocatalytic filter screens are located on the upper side and the lower side of the ultraviolet light source.
Optionally, the first detection device and the second detection device employ electrochemical sensors for detection.
Optionally, the detection precision of the first detection device and the second detection device is 0.01mg/m3。
The indoor air purification device comprises a filtering device, an ozone generator, a photocatalysis device and a catalytic decomposition device, is suitable for indoor air purification, is provided with a formaldehyde and ozone detection device, and displays the formaldehyde concentration and the ozone concentration of indoor air in real time. In order to avoid the over-standard concentration of the indoor ozone, the controller is arranged, the ozone generator can be adjusted or closed, the ultraviolet irradiation intensity is increased or reduced based on the indoor ozone concentration and the formaldehyde concentration, and meanwhile, the heating device of the catalytic decomposition equipment can be adjusted, so that the decomposition rate of the ozone is effectively improved. Meanwhile, the air outlet is provided with formaldehyde and ozone detection equipment, the purification efficiency can be calculated according to formaldehyde detection data of the air inlet and the air outlet, and the ozone generation amount and the illumination intensity can be adjusted and whether the catalyst is inactivated or not can be judged based on the calculated purification efficiency.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles and apparatus of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic structural view of an air cleaning apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an air cleaning apparatus according to another embodiment of the present invention;
FIG. 3 is a schematic view illustrating the internal connection of an air cleaning apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an air cleaning apparatus with an internal catalytic decomposition device connected to a controller according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a photocatalytic device according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a photocatalytic device according to an embodiment of the present invention;
wherein: 1-air inlet;
2-a first formaldehyde detection device;
3-a first ozone detection device;
4-a filtering device;
5-an ozone generator;
6, a fan;
7-catalytic decomposition equipment;
8-a photocatalytic device;
9-second formaldehyde detection equipment;
10-a second ozone detecting device;
11-air outlet;
12-photocatalytic filter screen;
a microwave electrodeless ultraviolet source with a wave band of 13-254 nm;
14-a controller;
15-a photocatalyst;
16-185 nm wave band microwave electrodeless ultraviolet source;
17-a temperature sensor;
18-heating means.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent that the invention may be practiced without limitation to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The ozone generator used in the application generally adopts a corona discharge or dielectric barrier discharge mode to generate ozone, and air or oxygen can be used as an air source to generate ozone.
Photolysis reaction: photons emitted by ultraviolet irradiation have certain energy, and when the energy is larger than the energy required by the chemical bond breakage of the pollutants, the chemical bond breakage of the pollutants can be realized, and then the pollutants are decomposed. For example, in the 254nm band, the energy of the ultraviolet photons is 4.88eV, which is sufficient to destroy the C-H bond energy (4.14eV) of formaldehyde molecules.
Photocatalytic method: by TiO2And ZnO and other photocatalysts generate holes and hydroxyl radicals with strong oxidizing capability, and formaldehyde can be oxidized to generate carbon dioxide and water, but the photocatalysts can be activated only under the irradiation of ultraviolet light. A commonly used photocatalyst is TiO2。
A catalytic oxidation method: the common catalyst is manganese dioxide, the oxidizability of the catalyst can be improved by doping metals such as Ag, Pt and the like, the decomposition rate of the catalyst on ozone can reach 100%, and the catalyst also has higher decomposition efficiency on formaldehyde. The catalytic oxidation method can decompose gaseous pollutants such as ozone, formaldehyde and the like at normal temperature without light source irradiation. But the activity of the catalyst is obviously different at different reaction temperatures, the formaldehyde catalytic oxidation reaction is an endothermic reaction, and the reaction rate can be accelerated by increasing the temperature of a catalyst bed layer. And when the temperature of the catalyst is increased, the decomposition rate of ozone can be effectively increased, and the concentration of ozone at the air outlet can be reduced. Therefore, in the application, the heating devices are additionally arranged on the periphery of the catalytic decomposition equipment, microwave heating or electric heating can be adopted, and the heating temperature of the catalytic decomposition equipment can be set to be 20-30 ℃ in consideration of the living requirement. The temperature sensor is arranged to transmit the temperature of the catalytic decomposition equipment to the control end, and the temperature of the catalytic decomposition equipment is displayed and adjusted in real time. The heating device is additionally arranged, so that higher purification efficiency can be still realized at different indoor temperatures.
In an ultraviolet and ozone combined air purifying sterilizer, an ultraviolet lamp and an ozone generator are adopted in the technology. The ultraviolet rays irradiate the surface of the microorganism to change and destroy the tissue structure (DNA-nucleic acid) of the microorganism, destroy the nucleic acid structure or function of cells or viruses and realize disinfection and purification. In the process, a 240-280nm band ultraviolet lamp is adopted, the released photons can photolyze formaldehyde, but a catalyst is not added in an ultraviolet lamp irradiation area, and the formaldehyde purification efficiency is low. The ozone generator and the ultraviolet lamp are used for irradiation, deep disinfection and purification can be carried out under the unmanned condition, a catalytic decomposition device is lacked, generally, the half-life period of ozone in air is 5-16h, and the time for indoor reaching the ozone safety standard limit value is long only by means of attenuation of the ozone. Ozone detection equipment is not arranged, indoor ozone concentration cannot be displayed in real time, and the ozone concentration in indoor air cannot be guaranteed to meet safety standards.
In a portable air purification device based on ozone and photocatalysis, the photocatalysis can decompose formaldehyde in the air in coordination with ozone, and be equipped with ozone generator power adjusting device and ultraviolet lamp brightness control device, adjustable ozone release volume and ultraviolet illumination intensity, but do not set up ozone decomposition device, can't be to further decomposition of remaining ozone in the air outlet, and do not set up ozone concentration detection device, can't show indoor ozone concentration in real time, can't guarantee that indoor air ozone concentration satisfies the safety standard.
In the multifunctional coating air purification system and method based on in-situ photocatalytic oxidation and ozonization enhancement, gaseous pollutants such as formaldehyde, toluene and the like in the air are decomposed by ozone generated by an ozone generator in a primary decomposition module, formaldehyde is subjected to photolysis and oxidative decomposition on the surface of a catalyst by a photocatalytic device in a secondary decomposition module, and ozone can be decomposed on the surface of a titanium dioxide catalyst under ultraviolet irradiation. But only on TiO2The effect of photocatalyst is not enough to carry out complete decomposition to remaining ozone molecule, and does not set up ozone concentration check out test set, can't guarantee whether indoor ozone concentration is up to standard.
In an air purification method, system and application of catalytic oxidation degradation VOCs, firstly, air flows through an ozone generator to generate free oxygen radicals and ozone, so that part of organic matters in the air are degraded into micromolecular compounds; then, the air enters a catalytic oxidation reaction device and contacts with a catalyst in the presence of free oxygen radicals and ozone to catalytically oxidize and degrade VOCs molecules. Finally, the water flows through the photocatalytic filter component and the activated carbon fiber to kill microorganisms in the air and adsorb residual ozone in the air. The ozone generator has the advantages that the ozone is generated by adopting an ultraviolet light source mode, and the accurate adjustment of the ozone concentration cannot be realized based on different use scenes or different VOCs concentrations; and if the ozone detection equipment is not installed, whether the ozone concentration in the indoor air meets the safety standard cannot be judged.
Although the similar technology realizes the decomposition of formaldehyde and the sterilization of microorganisms in the air, the concentration of formaldehyde in the air cannot be judged to meet the control quality standard, and an ozone detection device is not arranged, so that the concentration of ozone in the indoor air cannot be judged to meet the safety standard.
The air cleaning device of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment, an air purification apparatus includes an air inlet 1, a first detection device, a filtering device 4, an ozone generator 5, a fan 6, a photocatalytic device 8, a catalytic decomposition device 7, a second detection device, and an air outlet 11, which are sequentially disposed, where the first detection device includes a first formaldehyde detection device 2 and a first ozone detection device 3, and the first formaldehyde detection device and the first ozone detection device are located on two sides of the air inlet; the filtering equipment is used for filtering dust particles in the air; the ozone generator generates ozone by adopting a low-temperature plasma mode; the fan is used for discharging air from the air outlet after the air enters from the air inlet; the photocatalytic equipment comprises a photocatalytic filter screen 12 and an ultraviolet light source 13 and is used for decomposing formaldehyde and thoroughly killing microorganisms in the air; the catalytic decomposition equipment is provided with a heating device 18 and is used for efficiently reducing the concentration of ozone in the purified air; the second detection device comprises a second formaldehyde detection device 9 and a second ozone detection device 10, and the second formaldehyde detection device and the second ozone detection device are located on two sides of the air outlet. In addition, as shown in fig. 2, both the photocatalytic device 8 and the catalytic decomposition device 7 which are disposed in this order may be reversed.
In one embodiment, as shown in fig. 3, the air purification apparatus further includes a controller 14, the controller is connected to the first detection device, the ozone generator, the photocatalytic device, the catalytic decomposition device, and the second detection device, and is configured to adjust an ozone generation amount of the ozone generator and an ultraviolet light intensity of the photocatalytic device according to at least one of different scenes, different environmental requirements, different gears of the fan, a detection result of the first detection device, and a detection result of the second detection device, and adjust a heating device of the catalytic decomposition device at the same time, so as to effectively improve a decomposition rate of ozone, so that the ozone and the photocatalytic synergistic effect purifies air, and it is ensured that indoor air formaldehyde and ozone concentration meet safety standards. In one embodiment, as shown in fig. 4, the air cleaning apparatus further includes a temperature sensor 17 connecting the controller and the catalytic decomposition device.
In one embodiment, the filtration equipment adopts a HEPA filter screen, and the filtration efficiency of the particles with the particle size of more than or equal to 0.3 mu m is more than 99.97 percent. The air after dust removal flows through an ozone generator, ozone is generated by adopting a low-temperature plasma mode, the ozone output range is 0-10mg/h, the ozone concentration adjusting range is 0-100%, and the ozone output can be adjusted by adjusting power.
In one embodiment, as shown in fig. 5, the photocatalytic module includes an ultraviolet lamp and a titanium dioxide photocatalytic filter, the ultraviolet lamp is a 254nm band microwave electrodeless ultraviolet light source 13, the photocatalyst 15 is titanium dioxide, photon energy generated by irradiation of the ultraviolet lamp is greater than bond energy of formaldehyde molecules, formaldehyde in air can be directly photolyzed, meanwhile, ozone decomposition is accelerated on the surface of the titanium dioxide photocatalyst 15 under irradiation of the ultraviolet lamp to generate active oxygen free radicals, formaldehyde is further decomposed, and ultraviolet rays irradiate the surface of a microorganism, so that destruction of a microorganism tissue structure (DNA-nucleic acid) can be changed, a nucleic acid structure or function of cells or viruses can be destroyed, and disinfection and purification can be realized.
In one embodiment, the catalytic decomposition device uses manganese dioxide catalyst, which can be doped with Ag, Pt, etc. The manganese dioxide catalyst has a decomposition rate of ozone close to 100%, and further reduces the concentration of ozone in the purified air. The manganese dioxide catalyst has higher decomposition efficiency on formaldehyde, and can further remove formaldehyde in the air.
In one embodiment, formaldehyde in the air can be decomposed once by using an oxidation reaction of ozone, the gas enters the photocatalytic module after the first decomposition, the formaldehyde in the air is photolyzed, and disinfection and purification are realized.
Correspondingly, in one embodiment, formaldehyde in the air can be decomposed once by using the oxidation reaction of ozone, and the gas after the once decomposition can also enter a catalytic oxidation decomposition device, namely catalytic decomposition equipment, so that the concentration of ozone in the purified air is further reduced to ensure that the ozone content in the air outlet meets the safety standard. The air after formaldehyde purification enters the photocatalysis equipment to photolyze formaldehyde in the air and realize disinfection and purification.
In one embodiment, as shown in fig. 6, the 254nm microwave electrodeless ultraviolet light source 13 and the 185nm microwave electrodeless ultraviolet light source 16 are used because only the 254nm band is used, only the microbial sterilization effect can be achieved, but the organic matter purification ability is weak and the effect on the benzene-based pollutants is little. If the light-emitting diode comprises a 185nm wave band, the light-emitting diode can play a role in purifying organic matters and removing peculiar smell.
In one embodiment, ozone detection equipment is additionally arranged at the air inlet and the air outlet, an electrochemical method is adopted, and the detection precision is 0.01mg/m3Can detect the ozone concentration of the tuyere in real time, and when the ozone concentration is more than 0.05mg/m3When in use, the ozone generator can be adjusted to be small or closed, so as to ensure that the indoor air meets the ozone safety standard (0.05 mg/m)3)。
In one embodiment, the first formaldehyde detection device is arranged at the air inlet, and the detection precision is 0.01mg/m by adopting an electrochemical method3When the total concentration content is less than or equal to 0.1mg/m3When the ozone generation amount is closed or reduced, the ozone oxidation is cooperated with the manganese dioxide to catalyze and decompose the formaldehyde, and when the concentration content (time average value) of the formaldehyde is more than 0.1mg/m3When the ozone generator is started, the ozone generator can be automatically or manually started, and under the mode, the ozone, the photocatalysis and the catalytic oxidation are cooperated to realize a high-efficiency purification mode.
In one embodiment, the second formaldehyde detection equipment is arranged at the air outlet, and the detection precision is 0.01mg/m by adopting an electrochemical method for detection3The formaldehyde concentration in the air at the air outlet is detected in real time, and the formaldehyde purification efficiency is calculated based on the formaldehyde detection data at the air inlet and the air outlet, so that the ozone generation amount and the illumination intensity can be adjusted in an assisting manner, and whether the formaldehyde concentration is higher or not can be judgedAnd replacing the catalytic decomposition equipment.
The invention adopts the ozone generator with controllable ration, which is controlled independently. The ozone release amount can be adjusted according to different scenes and different environmental requirements, and the formaldehyde decomposition and the microbial killing are realized. The regulation of the ozone generator can be related to the air volume, and different ozone release amounts are matched according to different gears so as to reduce the influence of air volume regulation on the indoor ozone concentration.
The adoption of 254nm microwave electrodeless ultraviolet lamp has no electrode loss, the output intensity of ultraviolet light will not decrease with the increase of service time, and the persistent purification capability is strong. In addition, the illumination intensity can be changed by adjusting the microwave power, and the air purification efficiency can be further adjusted.
Triple formaldehyde purification process: ozone released by the ozone generator can decompose part of formaldehyde by utilizing the oxidizability of the ozone; under the irradiation of ultraviolet light, ozone is decomposed on the surface of the titanium dioxide photocatalyst in an accelerating way, and active factors such as released hydroxyl free radicals and hydrogen peroxide have a decomposition effect on formaldehyde in the air; the manganese dioxide catalyst has a certain decomposition effect on formaldehyde in the air.
The air inlet is provided with a first formaldehyde detection device, an electrochemical sensor is adopted to detect the concentration of formaldehyde in indoor air, and the detection precision is 0.01mg/m3The total concentration is more than 0.1mg/m3When the ozone generator is started, the high-efficiency purification mode is started automatically or manually. When the total concentration is less than or equal to 0.1mg/m3When the ozone generator is turned down, the ozone generator is automatically turned off. The air outlet is additionally provided with formaldehyde detection concentration, so that the ozone generation amount and the illumination intensity can be adjusted and whether the catalyst is inactivated or not can be judged.
Ozone detection devices are additionally arranged at the air inlet and the air outlet, the ozone concentration can be measured in real time by adopting an electrochemical method, and the resolution ratio is 0.01mg/m3Whether the ozone concentration of the indoor air meets the national safety standard of 0.05mg/m or not is judged by monitoring the ozone concentration in real time3。
The heating devices are additionally arranged around the catalytic decomposition equipment, so that the temperature of the catalyst module is increased, the catalytic decomposition efficiency of ozone and the decomposition efficiency of formaldehyde can be effectively improved, and higher purification efficiency can be still maintained at indoor temperatures in different seasons.
On the basis of fully researching the technical characteristics of formaldehyde purification and microbial killing of the existing indoor air equipment, the invention researches a purification technology suitable for indoor different formaldehyde concentrations in a targeted manner. The high-efficiency filtering equipment can efficiently remove particles in the air; the ozone release device can adjust different ozone release amounts based on different use scenes, the ozone can decompose formaldehyde in the air, and the low-concentration ozone has a good effect of killing microorganisms; by adopting microwave electrodeless ultraviolet light and microwave synergistic photocatalyst, the formaldehyde decomposition efficiency and the microbial killing can be effectively improved, and the service life is greatly prolonged. The catalytic oxidation device is added, so that residual ozone in the purified air can be further decomposed, the ozone content in the purified air is reduced, and the manganese catalyst also has a certain decomposition effect on formaldehyde. Based on the detected concentration of the formaldehyde concentration at the air inlet and the air outlet, the ozone release amount and the ultraviolet light intensity are adjusted, so that the method can be used for indoor scenes with higher formaldehyde concentration, such as building decoration, furniture renovation and the like, and is also suitable for conventional indoor air purification. The catalytic decomposition equipment is additionally provided with a heating device, so that the ozone decomposition rate and the formaldehyde purification efficiency can be improved, and higher purification efficiency can be still kept at different environmental temperatures. And finally, ozone detection equipment is additionally arranged at the air inlet and the air outlet, so that the ozone content in the indoor air can be detected in real time, and the safety is ensured.
The invention provides an indoor air purification device capable of achieving multiple functions of removing particulate matters, killing bacteria and viruses, decomposing and removing formaldehyde, removing peculiar smell and the like, which comprises a filtering device, an ozone generator, a photocatalysis (254nm) device, a catalytic oxidation device with a heating device, and an ozone detection device and a formaldehyde detection device, and solves the problems that the common indoor air purification device is weak in durability in the aspect of formaldehyde purification, cannot completely kill bacteria and viruses, is lack of formaldehyde concentration detection and ozone concentration detection and the like.
Based on the above description, the air purification device proposed by the present invention has at least the following advantages:
1. the invention adopts the ozone generator with controllable ration, which is controlled independently. The ozone release amount can be adjusted according to different scenes and different environmental requirements, and the formaldehyde decomposition and the microbial killing are realized. The regulation of the ozone generator can be related to the air volume, and different ozone release amounts are matched according to different gears so as to reduce the influence of air volume regulation on the indoor ozone concentration.
2. The adoption of 254nm microwave electrodeless ultraviolet lamp has no electrode loss, the output intensity of ultraviolet light will not decrease with the increase of service time, and the persistent purification capability is strong. In addition, the illumination intensity can be changed by adjusting the microwave power, and the air purification efficiency can be further adjusted.
3. Triple formaldehyde purification process: ozone released by the ozone generator can decompose part of formaldehyde by utilizing the oxidizability of the ozone; under the irradiation of ultraviolet light, ozone is decomposed on the surface of the titanium dioxide photocatalyst in an accelerating way, and active factors such as released hydroxyl free radicals and hydrogen peroxide have a decomposition effect on formaldehyde in the air; the manganese dioxide catalyst has a certain decomposition effect on formaldehyde in the air.
4. The air inlet is provided with first formaldehyde detection equipment, an electrochemical sensor is adopted to detect the concentration of formaldehyde in indoor air, and the detection precision is 0.01mg/m3The total concentration is more than 0.1mg/m3When the ozone generator is started, the high-efficiency purification mode is started automatically or manually. When the total concentration is less than or equal to 0.1mg/m3When the ozone generator is turned down, the ozone generator is automatically turned off.
5. A second formaldehyde detection device is arranged at the air outlet, and the detection precision is 0.01mg/m3And detecting the concentration of formaldehyde in the purified air in real time, calculating the formaldehyde purification efficiency based on formaldehyde detection data of the air inlet and the air outlet, and assisting in adjusting the ozone generation amount and the illumination intensity and judging whether the catalyst is inactivated or not and whether the catalytic decomposition equipment is replaced or not. 6. Ozone detection devices are additionally arranged at the air inlet and the air outlet, the ozone concentration can be measured in real time by adopting an electrochemical method, and the resolution ratio is 0.01mg/m3Whether the ozone concentration in the indoor air meets the national safety standard of 0.05mg/m or not is judged by monitoring the ozone concentration in real time3。
7. The heating devices are additionally arranged around the catalytic decomposition equipment, so that the temperature of the catalyst module is increased, the catalytic decomposition efficiency of ozone and the decomposition efficiency of formaldehyde can be effectively improved, and higher purification efficiency can be still maintained at indoor temperatures in different seasons.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "disposed" and the like, as used herein, may refer to one element being directly attached to another element or one element being attached to another element through intervening elements. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (14)
1. An air purification device is characterized by comprising an air inlet, a first detection device, a filtering device, an ozone generator, a fan, a photocatalytic device, a catalytic decomposition device, a second detection device and an air outlet which are arranged in sequence,
the first detection equipment comprises first formaldehyde detection equipment and first ozone detection equipment, and the first formaldehyde detection equipment and the first ozone detection equipment are positioned on two sides of the air inlet;
the filtering equipment is used for filtering dust particles in the air;
the ozone generator generates ozone by adopting a low-temperature plasma mode;
the fan is used for discharging air entering from the air inlet from the air outlet;
the photocatalytic equipment comprises a photocatalytic filter screen and an ultraviolet light source and is used for decomposing formaldehyde and killing microorganisms in the air;
the catalytic decomposition equipment is used for reducing the concentration of ozone in the purified air;
the second detection equipment comprises second formaldehyde detection equipment and second ozone detection equipment, and the second formaldehyde detection equipment and the second ozone detection equipment are located on two sides of the air outlet.
2. The air cleaning apparatus according to claim 1, wherein the photocatalytic device and the catalytic decomposition device which are disposed in this order are interchanged in the order of front and rear.
3. The air cleaning apparatus according to claim 1 or 2, wherein the catalytic decomposition device is a catalytic decomposition device having a heating device for reducing the concentration of ozone in the cleaned air.
4. The air purification apparatus according to claim 3, further comprising a controller, wherein the controller is connected to the first detection device, the ozone generator, the photocatalytic device, the catalytic decomposition device, and the second detection device, and the controller is configured to adjust an ozone generation amount of the ozone generator and an ultraviolet light intensity of the photocatalytic device, and adjust a heating device of the catalytic decomposition device.
5. The air cleaning apparatus according to claim 3, further comprising a temperature sensor connecting the controller and the catalytic decomposition device.
6. The air purification apparatus of claim 1, wherein the filtering device employs a HEPA screen.
7. The air cleaning apparatus according to claim 1, wherein the catalytic decomposition device uses a manganese dioxide catalyst.
8. The air purification apparatus of claim 7, wherein the manganese dioxide catalyst is doped with Ag and/or Pt.
9. The air purification apparatus of claim 1, wherein the photocatalytic filter is a titanium dioxide photocatalytic filter.
10. The air purification apparatus of claim 1, wherein the ultraviolet light source comprises a 254nm band microwave electrodeless ultraviolet light source.
11. The air purification apparatus of claim 10, wherein the ultraviolet light source further comprises a 185nm band microwave electrodeless ultraviolet light source.
12. The air purification device of claim 1, wherein at least two photocatalytic filter screens are arranged on the upper side and the lower side of the ultraviolet light source.
13. The air purification apparatus of claim 1, wherein the first detection device and the second detection device employ an electrochemical sensor for detection.
14. The air purification apparatus according to claim 9, wherein the detection accuracy of the first detection device and the second detection device is 0.01mg/m3。
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| CN115289589A (en) * | 2022-08-23 | 2022-11-04 | 江苏容正医药科技有限公司 | Intelligent flexible honeycomb type air dynamic constant-cleaning and disinfecting system and method |
| CN115751581A (en) * | 2023-01-11 | 2023-03-07 | 大气(广东)科技发展有限公司 | Indoor air disinfection and degradation equipment and disinfection system |
| WO2024045335A1 (en) * | 2022-08-30 | 2024-03-07 | 深圳市利孚医疗技术有限公司 | Ozone catalyzing and eliminating device and plasma beauty instrument |
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