CN111912046A - Air filtering device, equipment, preparation method and air filtering method - Google Patents
Air filtering device, equipment, preparation method and air filtering method Download PDFInfo
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- CN111912046A CN111912046A CN202010677792.1A CN202010677792A CN111912046A CN 111912046 A CN111912046 A CN 111912046A CN 202010677792 A CN202010677792 A CN 202010677792A CN 111912046 A CN111912046 A CN 111912046A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0435—Electret
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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Abstract
The application discloses an air filtering device, air treatment equipment, a preparation method of a filter screen and an air filtering method, relates to the technical field related to air cleaning, and aims to effectively kill microorganisms by using a ferroelectric adsorption layer and a titanium dioxide layer in air so as to create a safer and more sanitary living environment for people. The air filtering device comprises a shell, an ultraviolet light source, a power supply device, a filter screen and a reflector, wherein the filter screen comprises a metal net, a ferroelectric adsorption layer and a titanium dioxide sterilization layer, and the ferroelectric adsorption layer and the titanium dioxide sterilization layer are coated on a metal base material.
Description
Technical Field
The application relates to the technical field related to air cleaning, in particular to an air filtering device, air treatment equipment, a preparation method of a filter screen and an air filtering method.
Background
With the development of global industrialization, air pollution is more and more serious, and serious harm is caused to daily life and body health of people. The existing air cleaning technology mostly adopts physical filtration, such as a hepa (high efficiency particulate air) filter, which blocks dust on a filter screen, and has the defect that after a certain time of operation, a large amount of dust and microorganisms are attached to the filter screen, thereby seriously affecting the quality of indoor air. The photocatalysis anatase phase titanium dioxide is used for generating chemical substances with strong oxidizing property to play a role in sterilization, so that the air sterilization and purification are realized, and the photocatalysis anatase phase titanium dioxide is one of the hotspots of the air cleaning technology research. However, the air purification system manufactured by using the titanium dioxide photocatalysis technology has the following problems: 1, the surface of titanium dioxide contains hydroxyl, so that the titanium dioxide has hydrophilicity, and the photocatalytic reaction rate is greatly reduced; 2, the forbidden band width of the titanium dioxide is about 3.2eV (387.5nm), the light absorption of the titanium dioxide is limited in a near ultraviolet region, and the utilization rate of the titanium dioxide to sunlight is very low (about 1 percent); 3, for the air purification system of the multilayer filter screen constructed by different materials, the filter screen is complicated in disassembly step, complicated in structure and not beneficial to cleaning, and a large amount of bacteria are bred after long-time use; 4, the air purification system with the function of enhancing the adsorption of the filter screen adopts a method of inclining the filter screen or electrifying the filter screen to achieve the effect of enhancing the adsorption, however, the effect of the former is not ideal, and the latter can cause potential safety hazards and energy waste.
Disclosure of Invention
In view of the above, a first object of the present application is to provide an air filtering device, which can effectively kill the pollutants in the air, especially the microorganisms, and create a safer and more sanitary living environment for people.
A second object of the present application is to provide an air treatment device comprising the air filtration apparatus of the present application, the air treatment device including but not limited to: air conditioner, air cleaner, new trend system etc..
A third object of the present application is to provide a method of manufacturing the air filter device.
A fourth object of the present application is to provide a method of filtering air using the air filtering device.
In order to solve the above technical problems, a first aspect of the present application provides an air filtering device, including a housing, an ultraviolet light source, a power supply device, a filter screen, and a reflector;
an air duct surrounded by four flat plates is arranged in the shell; the ultraviolet light source is arranged in the air duct and used for emitting ultraviolet rays to irradiate the filter screen; the power supply device is electrically connected with the filter screen and is used for supplying voltage to the filter screen or disconnecting the voltage of the filter screen; the filter screen is arranged in the air duct and comprises a metal substrate, a ferroelectric adsorption layer and a sterilization layer, the ferroelectric adsorption layer is positioned on the metal substrate, and the sterilization layer is positioned on the ferroelectric adsorption layer; the sterilization layer is a titanium dioxide layer, the titanium dioxide has an anatase structure, a nano-scale biological capture cage is formed on the surface of the titanium dioxide layer with the structure, and the sterilization function of the nano-scale biological capture cage is activated by ultraviolet light; after voltage pulse/stress is applied, the surface of the ferroelectric adsorption layer carries positive charges to form adsorption capacity, and microorganisms are locked in the nanoscale biological capture cage; the nanometer biological capture cage forms a carrier for fixing microorganisms, so that a spectrum analysis component can analyze the types of the microorganisms in the nanometer biological capture cage, and the ultraviolet dose can be dynamically adjusted according to the types of the microorganisms; after reverse voltage pulse/stress is applied to the ferroelectric adsorption layer, negative charges are carried on the surface of the ferroelectric adsorption layer, and inactivated microorganisms fall off from the nano-scale biological capture cage.
In one possible embodiment, the uv light source is disposed on a flat plate at the bottom and/or top of the air duct.
In a possible embodiment, the power supply device comprises a wire, one end of the wire is connected with the filter screen, and the other end of the wire is connected with the power supply electrode, wherein before the air filter device starts the inactivation function, one end of the filter screen is connected with the negative electrode of the power supply, and after the inactivation is performed for a period of time, one end of the filter screen is connected with the positive electrode of the power supply, so that the direction of the current loaded on the filter screen is changed alternately.
In a possible embodiment, the power supply device comprises a switch for controlling or stopping the supply of voltage to the filter screen.
In a possible embodiment, the power supply device comprises a timer, and the timer is used for supplying voltage to the filter screen within a timing time and stopping supplying voltage to the filter screen at the end of the timing time.
In a possible implementation manner, the number of the filter screens is two, and the two filter screens are fixed in the air duct in a V shape.
In a possible implementation manner, a collecting box is arranged at a position, corresponding to the filter screen, of the flat plate at the bottom of the air duct, and the collecting box is used for collecting microorganisms falling off from the filter screen.
A second aspect of the present application provides an air treatment device comprising any one of the air filtration apparatus described above.
A third aspect of the present application provides a method for manufacturing a filter screen, including: providing a metal mesh; adding a ferroelectric adsorption layer on the metal substrate of the metal mesh; adding a sterilization layer on the ferroelectric adsorption layer; combining the interface of the sterilization layer and the ferroelectric adsorption layer in the form of chemical bonds through rapid thermal annealing;
and (5) obtaining the filter screen after the rapid thermal annealing is finished.
In one possible embodiment, the metal substrate is a heavy metal.
Further, the heavy metal is red copper.
In one possible embodiment, the biocidal layer is a titanium dioxide layer.
Further, the ferroelectric adsorption layer is a barium titanate layer.
Furthermore, the titanium dioxide layer is doped with an up-conversion effect element.
Furthermore, the up-conversion effect element is at least one of rare earth element oxides of La, Yb, Er, Ho and Tm.
Further, the titanium dioxide layer is a nano titanium dioxide layer.
The third purpose of the application is realized by the following technical scheme:
a fourth aspect of the present application provides an air filtering method, comprising:
the power supply device provides voltage for the filter screen for a certain time and then cuts off the voltage; activating the adsorption capacity of the ferroelectric adsorption layer through the voltage provided by the power supply device, and adsorbing microorganisms in air input from the air inlet; catalyzing the sterilizing capability of the sterilizing layer through ultraviolet rays emitted by the ultraviolet light source, and sterilizing the microorganisms adsorbed on the filter screen; and reflecting the ultraviolet rays to the filter screen through the reflector.
In a possible implementation mode, the power supply device supplies voltage to the filter screen for 0.1-60 seconds and then cuts off the voltage.
In one possible embodiment, the ultraviolet wavelengths are the UVA band and the UVC band, which are used for catalysis and for activating the bactericidal power of the titanium dioxide coating.
In one possible embodiment, the microorganisms are various solid or liquid particles uniformly dispersed in an aerosol system.
In the present application, anatase phase titanium dioxide is excited to transit electrons in the top of its valence band to the bottom of the conduction band during Ultraviolet (UVA) irradiation, which in turn generates photogenerated electrons and holes. The photo-generated electrons combine with oxygen molecules to generate superoxide ion free radicals (O)2 －) Photo-generated holes and catalyst TiO2Surface adsorbed H2O or OH－The reaction generates hydroxyl radical (. OH) with strong oxidizing property, and further generates hydroxyl radical. OH and H2O2And other active oxygen-based chemical substances, which exert a photocatalytic bactericidal action by oxidizing coenzyme A in the body of bacteria, disrupting the permeability of bacterial cell walls/membranes and the structure of DNA, interrupting electron transport and expression of genetic information, and the like. The adoption of a mode of combining UVA and UVC ultraviolet rays can effectively improve the dioxideTitanium photocatalysis effect, thereby improving the sterilization effect. The titanium dioxide is added with the element components with the up-conversion characteristic, and the function of inactivating photocatalytic bacteria can be realized by utilizing a visible light wave band.
In the present application, red copper has good electrical and thermal conductivity and corrosion resistance. In a humid environment, copper produces Cu2+Positively charged Cu2+Binds to and interacts with negatively charged bacteria, thereby causing outer membrane breaches of bacteria, viruses and microorganisms. Due to Cu2+Is a heavy metal, and can destroy proteins and respiratory enzymes in microorganisms and destroy the activity of catalytic enzymes. The copper/anatase titanium dioxide composite coating is formed on the surface of the copper mesh to form a microorganism capture cage filter screen, the filter screen is fixed in a V shape, the structure is simple, the assembly and disassembly are easy, the contact area of the filter screen and air is increased, and the adsorption effect on microorganisms is enhanced.
In the present application, a ferroelectric material is a material having a ferroelectric effect, in which there exists spontaneous polarization of dipoles and the directions of polarization are randomly distributed, and the whole crystal is non-polarized and neutral in a macroscopic view. When an external field acts, the polarization direction of dipoles inside the ferroelectric material changes, the polarization direction of the dipoles tends to be consistent with the increase of the strength of the electric field/force field, the dipoles macroscopically show the charging characteristic, and the quantity and the type of surface charges are determined by the strength and the direction of the external electric field/force field. The ferroelectric film has spontaneous polarization characteristic, so that certain charges exist on the surface of the filter screen, and potential safety hazards and energy waste caused by long-time electrification are avoided while adsorption of microorganisms and other pollutants is enhanced. The self-purification function based on the ferroelectric filter screen can be realized by changing the surface charge type of the filter screen, and the accumulation of pollutants and the breeding of microorganisms are effectively avoided.
In the application, anatase titanium dioxide is fixed on a copper net loaded with ferroelectric materials by a sol-gel method or a titanium dioxide particle spraying method, and the method is simple and economic and has low energy consumption; the copper mesh is arranged at the air inlet in a V shape in a hanging mode (the mode is convenient to disassemble and clean dust), so that the adsorption effect can be improved, and the light receiving area of the copper mesh can be increased; near fixed ultraviolet LED mercury lamp light source and reflector panel near the copper mesh, the ultraviolet LED light source is the UVA wave band, can not cause the burn to human skin, can not produce ozone, reduces the electric energy waste that the low efficiency wave band leads to, and the effect of reflector panel prevents firstly that light from spilling over to cause the injury outside the quick-witted case to the human body, secondly high-efficiently utilizes the ultraviolet ray to improve titanium dioxide sterilization performance. Because bacteria are mostly in a slightly alkaline (pH 7< 7.5), neutral (pH 7) and slightly acidic (pH 6< 7), the pH value of the environment is higher than the isoelectric point of the bacteria, the surfaces of the bacteria are always negatively charged, in addition, teichoic acid of the bacterial cell walls contains a large amount of phosphate groups with strong acidity, the surfaces of the bacteria are negatively charged, and barium titanate grows on a copper net, so that the surfaces of the polarized barium titanate can be kept charged after an electric field is removed, the surfaces of the filter nets are positively charged, the adsorption effect on microorganisms is enhanced through the attraction of the positive charges and the negative charges, and the charged state can be recovered only by electrifying the copper net once (for several seconds) after long-time use. After the ultraviolet radiation, the microorganisms deposited on the surface of the filter screen are effectively removed by changing the surface charge type of the filter screen.
The implementation of the embodiment of the application has the following beneficial effects: 1. the filter screen has simple structure and low manufacturing cost. The copper mesh loaded with the ferroelectric adsorption layer is convenient to disassemble, and equipment is easy to clean and maintain; the filter screen is made of corrosion-resistant copper and oxide, has good ageing resistance and is durable; 2. the photocatalytic effect of visible light on titanium dioxide is improved by element doping based on the up-conversion effect, and the application scene of the filter screen for bacteriostasis and sterilization by sunlight outdoors is expanded; 3. the copper net is coated with a ferroelectric adsorption layer, the polarized ferroelectric material barium titanate can keep the surface of the filter screen positively charged under the condition of no external electric field, can keep the adsorption effect on microorganisms and other pollutants for a long time, and has the characteristics of cleanness, safety and high efficiency; 4. the technology does not produce consumables, titanium dioxide can be recycled, and after microorganisms are inactivated by titanium dioxide and ultraviolet rays and accumulate to a certain amount, only the copper mesh needs to be taken down for cleaning; 5. the air filtering device is energy-saving, silent, low in power consumption and environment-friendly.
Drawings
FIG. 1 is a schematic diagram of an air filtration apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air filter device according to an embodiment of the present invention;
FIG. 3 is a schematic top view of an air filtration apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic side view of an air filtration apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic view of a coating layer of a filter screen according to an embodiment of the present invention;
fig. 6A is a schematic flow chart of a method for manufacturing a filter screen according to an embodiment of the present invention;
FIG. 6B shows a filter screen made in accordance with an embodiment of the present invention;
FIG. 7 is a schematic flow chart of an air filtration method provided by an embodiment of the present invention;
reference numerals: 1. the air inlet, 2, filter screen, 3, U type ultraviolet lamp, 4, reflector panel, 5, wire.
Detailed Description
To facilitate understanding of those skilled in the art, the present invention is further described below in conjunction with specific examples, which are set forth to provide a non-limiting understanding of the scope of the present invention, and other embodiments are also contemplated, in the same or other contexts, in one or more examples.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1-4, a schematic structural diagram of an air filtering apparatus provided in an embodiment of the present application is shown in fig. 1 to 4, and includes a housing, an air inlet 1 on the housing, a filter screen 2 in the housing, a U-shaped ultraviolet lamp 3, a reflector 4, and a lead 5. An air duct surrounded by four flat plates is arranged in the shell 1; a U-shaped ultraviolet lamp 3 is arranged in the air duct and is used as an ultraviolet light source and used for emitting ultraviolet rays to irradiate the filter screen 2; the filter screen 2 is connected with a power supply device, and the power supply device supplies voltage to the filter screen 2 or cuts off the voltage of the filter screen 2 through the lead 5; the filter screen 2 includes a metal substrate, a ferroelectric adsorption layer and a sterilization layer, as shown in fig. 5, the ferroelectric adsorption layer is barium titanate (BaTiO)3) On the base layer material of red copper, the sterilizing layer of titanium dioxide (TiO)2) Located on the ferroelectric adsorption layer; providing voltage through the power supply device, changing the charge distribution of the ferroelectric adsorption layer to make the ferroelectric adsorption layer positively charged so as to adsorb microorganisms in the air; activating the sterilizing capability of the sterilizing layer through ultraviolet photocatalysis, wherein the ultraviolet light can be ultraviolet light in UVA wave band and UVC wave band; the reflector 4 is disposed at the top or bottom of the air duct, for example: as shown in FIG. 2, the reflector 4 is disposed at the bottom of the air ductAnd the part is opposite to the position of the U-shaped ultraviolet lamp so as to reflect the ultraviolet rays emitted by the U-shaped ultraviolet lamp 3, improve the photocatalysis efficiency and enhance the sterilization effect.
As shown in fig. 2 to 4, the U-shaped ultraviolet lamps 3 are disposed on flat plates at the bottom and top of the air duct for emitting ultraviolet rays to irradiate the filter screen 2. The power supply device provides voltage for the filter screen 2 or cuts off the voltage of the filter screen 2 through the lead 5, one end of the lead 5 is connected with the filter screen 2, and the other end of the lead is connected with the negative pole of the power supply. The power supply device comprises a switch, and the switch is used for controlling to supply voltage to the filter screen or stopping supplying voltage to the filter screen 2; the power supply device further comprises a timer, wherein the timer is used for providing voltage for the filter screen 2 within a timing time and stopping providing voltage for the filter screen 2 when the timing time is over.
In this application, air filter's air intake department can set up leading filter screen, and leading filter screen is arranged in the large granule pollutant among the prefilter air, for example: filtering pollutant particles with the particle size of more than or equal to 5.0 mu m; in addition, the air duct can be also provided with a fan for accelerating the circulation of air in the air duct, and the rotating speed of the fan can be automatically adjusted, for example: the rotating speed is automatically adjusted according to the concentration of the pollutants, the rotating speed of the fan is high when the concentration of the pollutants is high, and otherwise, the rotating speed of the fan is low when the concentration of the pollutants is low. After the prefilter of leading filter screen, still remain the pollutant of tiny granule in the air, including the microorganism in the pollutant of tiny granule, apply forward pulse voltage for the filter screen after power supply unit's the start of this application, this forward pulse voltage is direct current voltage, apply the ferroelectric adsorption layer on the power supply unit behind the forward pulse voltage and produce positive charge, positive charge forms adsorption efficiency to the pollutant (especially microorganism) in the air, lock the microorganism in the micro-nano biological cage, the bactericidal ability on ultraviolet ray light excitation titanium dioxide layer, microorganism to in the micro-nano biological cage carries out the inactivation treatment. After forward pulse voltage is applied for a period of time, the duration time of the forward pulse voltage is 0.1 s-60 s, then reverse pulse voltage is applied to the filter screen, the reverse pulse voltage is also direct current voltage, negative charges are generated on the surface of the ferroelectric adsorption layer, microorganisms can fall off from the micro-nano biological cage, a collection box can be arranged below the filter screen, and the fallen microorganisms can be placed in the collection box. In addition, the air filter device of this application still is provided with spectral analysis subassembly for carry out spectral analysis with discernment microorganism type to the microorganism in the little nanometer biological cage, can detect the microorganism distribution condition in current region like this. The air may also be left with smaller particles of contaminants after passing through the filter screens of the present application, for example: PM2.5 or PM1.0, so a post-filter may be provided after the filter for filtering fine particles in the air, for example: the rear filter screen can use an electrostatic electret filter mechanism to capture fine particles in air, an electret filter unit on the rear filter screen is filled with static electricity during production, the fine particles are captured due to the action of the static electricity, an external power supply is not needed, the air is cleaned after passing through the rear filter screen, the rear filter screen has certain service life, and a user is prompted to replace the rear filter screen after the rear filter screen reaches certain service life.
In the present application, the air filtration device may further comprise a spectral analysis assembly. The titanium dioxide layer forms a nano biological capture cage, the ferroelectric adsorption layer has adsorption capacity due to the action of voltage pulse, and the microorganism is locked in the nano biological capture cage, so that the nano biological capture cage forms a carrier for fixing the microorganism, a spectrum analysis assembly is convenient to analyze the type of the microorganism, the problem of inconvenient measurement caused by the floating of the microorganism in the air in the related technology is solved, and then the dose of ultraviolet rays, namely the illumination intensity of the ultraviolet rays, is dynamically adjusted in real time according to the type of the microorganism. For example: the air filtering device further comprises a spectrum analysis assembly, the mapping relation between the types of the microorganisms and the illumination intensity is stored in advance, the spectrum analysis assembly carries out spectrum analysis on the microorganisms in the nano-scale biological capture cage to obtain the types of the microorganisms, the illumination intensity is determined according to the pre-stored mapping relation, and then the illumination intensity of the ultraviolet lamp is controlled to reach the determined illumination intensity.
In the application, the sterilization layer is a titanium dioxide layer, the titanium dioxide has an anatase structure, a nano-scale biological capture cage is formed on the surface of the titanium dioxide layer with the structure, and the sterilization function of the nano-scale biological capture cage is activated by ultraviolet light; after the transient voltage pulse/stress is applied, the surface of the ferroelectric adsorption layer carries positive charges to form adsorption capacity, and the microorganisms are locked in the nano-scale biological capture cage; after the ferroelectric adsorption layer is applied with reverse voltage pulse/stress, the surface of the ferroelectric adsorption layer carries negative charges, and inactivated microorganisms fall off from the nano-scale biological capture cage.
As shown in fig. 2 to 4, the number of the filter screens 2 is two, and the two filter screens 2 are fixed in the air duct in a V-shape, so that the contact area with air is increased by the V-shaped structure, and the adsorption capacity is effectively enhanced.
Example two
Referring to fig. 6A, a schematic flow chart of a method for manufacturing a filter screen according to an embodiment of the present invention is shown, where in the embodiment of the present invention, the method includes:
s601, providing a metal net.
For example: a red copper mesh is provided.
And S602, adding a ferroelectric adsorption layer on the metal base material of the metal mesh by using a sol-gel method.
For example: the material for adding the ferroelectric adsorption layer on the red copper net by using a sol-gel method is barium titanate (BaTiO)3)。
And S603, adding a sterilizing layer on the ferroelectric adsorption layer by using a chemical solution deposition method or a spraying method.
For example: using a chemical solution deposition method or a spraying method to form a ferroelectric adsorption layer: barium titanate (BaTiO)3) Adding nano titanium dioxide (TiO) on the sterilizing layer2)。
S604, combining the sterilization layer and the surface of the ferroelectric adsorption layer in a chemical bond mode through rapid thermal annealing.
For example: rapidly annealing the sterilized layer of nano titanium dioxide (TiO)2) With the ferroelectric adsorption layer barium titanate (BaTiO)3) The surfaces are bound in the form of chemical bonds.
And S605, obtaining the filter screen after finishing the rapid thermal annealing. For example: the prepared filter screen is shown in fig. 6B, and the filter screen has a base material of a copper mesh, a ferroelectric adsorption layer is attached to the copper mesh, and a titanium dioxide layer is attached to the ferroelectric adsorption layer.
The filter screen 2 of the present embodiment is disposed in the air filtering device shown in fig. 1 to 4, and the filter screen 2 is obtained after the rapid thermal annealing is completed. The filter screen 2 manufactured by the method can prevent titanium dioxide from falling off in the using process and prolong the service life.
In one or more embodiments, the titanium dioxide layer is doped with at least one of the rare earth oxides of the upconversion effect element such as La, Yb, Er, Ho, Tm. The light emitting characteristic that long wavelength light can be converted into short wavelength light by using up-conversion effect elements is utilized to up-convert infrared and visible light in sunlight into titanium dioxide (TiO)2) The required ultraviolet light can not only improve the overall utilization rate of sunlight, expand the application scene of the air filtering device of the invention for bacteriostasis and sterilization by utilizing the sunlight outdoors, but also keep the titanium dioxide (TiO)2) Excited state electron-hole pair activity.
EXAMPLE III
Referring to fig. 7, a schematic flow chart of an air filtering method provided in an embodiment of the present application is shown, where in the embodiment of the present invention, the method includes:
and S701, switching off the voltage after the power supply device provides the voltage for the filter screen for a certain time.
S702, activating the adsorption capacity of the ferroelectric adsorption layer through the voltage provided by the power supply device, and adsorbing microorganisms in air input from the air inlet.
S703, catalyzing the sterilizing capability of the sterilizing layer through the ultraviolet rays emitted by the ultraviolet light source, and sterilizing the microorganisms adsorbed on the filter screen.
And S704, reflecting the ultraviolet rays to the filter screen through the reflector.
Wherein, the structure of the filter screen is shown in figures 1 to 4, and the manufacturing method of the filter screen is shown in figures6, the power supply device can provide voltage for the filter screen 2 for 6 seconds and then disconnect the voltage; activating the adsorption capacity of the ferroelectric adsorption layer through the voltage provided by the power supply device to adsorb microorganisms in the air input from the air inlet 1; the U-shaped ultraviolet lamp 3 emits ultraviolet rays with the wavelength of 365nm to catalyze the sterilization capacity of the sterilization layer and sterilize microorganisms adsorbed on the filter screen; the ultraviolet rays are reflected to the filter screen 2 through the reflecting plate 4. In the present embodiment, the red copper has good electrical and thermal conductivity and corrosion resistance. In a humid environment, copper produces Cu2+Positively charged Cu2+Binds to and interacts with negatively charged bacteria, thereby causing outer membrane breaches of bacteria, viruses and microorganisms. Due to Cu2+Is a heavy metal, and can destroy proteins and respiratory enzymes in microorganisms and destroy the activity of catalytic enzymes. The copper/anatase titanium dioxide composite coating is formed on the surface of the copper mesh to form a microorganism capture cage filter screen, the filter screen is fixed in a V shape, the structure is simple, the assembly and disassembly are easy, the contact area of the filter screen and air is increased, and the adsorption effect on microorganisms is enhanced.
In one or more embodiments, the microorganisms are various solid or liquid particles uniformly dispersed in an aerosol system.
Claims (10)
1. An air filtration device, comprising:
the air duct is formed by encircling four flat plates;
the ultraviolet light source is arranged in the air duct and used for emitting ultraviolet rays to irradiate the filter screen;
the power supply device is electrically connected with the filter screen and used for applying voltage pulse to the filter screen and then disconnecting the voltage pulse; wherein the duration time of the voltage pulse is 0.1-60 seconds;
the reflector is arranged at the top or the bottom of the air duct and used for reflecting the ultraviolet rays emitted by the ultraviolet light source;
the filter screen is arranged in the air duct and comprises a metal substrate, a ferroelectric adsorption layer and a sterilization layer, the ferroelectric adsorption layer is positioned on the metal substrate, and the sterilization layer is positioned on the ferroelectric adsorption layer; the sterilization layer is a titanium dioxide layer, the titanium dioxide has an anatase structure, a nano-scale biological capture cage is formed on the surface of the titanium dioxide layer with the structure, and the sterilization function of the nano-scale biological capture cage is activated by ultraviolet light; after voltage pulse/stress is applied, the surface of the ferroelectric adsorption layer carries positive charges to form adsorption capacity, and microorganisms are locked in the nanoscale biological capture cage; the nanometer biological capture cage forms a carrier for fixing microorganisms, so that a spectrum analysis component can analyze the types of the microorganisms in the nanometer biological capture cage, and the ultraviolet dose can be dynamically adjusted according to the types of the microorganisms; after reverse voltage pulse/stress is applied to the ferroelectric adsorption layer, negative charges are carried on the surface of the ferroelectric adsorption layer, and inactivated microorganisms fall off from the nanoscale biological capture cage;
the rear filter screen is arranged behind the filter screen and used for filtering PM particles generated by inactivated microorganisms to obtain clean air.
2. An air filtration device according to claim 1 wherein the uv light source is provided on a flat plate at the bottom and/or top of the air duct.
3. The air filtration device of claim 1 wherein the power supply means comprises a wire having one end connected to the filter screen and the other end connected to a negative pole of a power supply; or the power supply device comprises a switch, and the switch is used for controlling to supply voltage to the filter screen or stopping supplying voltage to the filter screen; or the power supply device comprises a timer, and the timer is used for providing voltage for the filter screen within the timing time and stopping providing voltage for the filter screen when the timing time is over.
4. The air filtering device according to claim 1, wherein the number of the filter screens is two, and the two filter screens are fixed in the air duct in a V shape.
5. An air treatment device comprising an air filtration apparatus as claimed in any one of claims 1 to 4.
6. A manufacturing method of a filter screen is characterized by comprising the following steps:
providing a metal mesh;
adding a ferroelectric adsorption layer on the metal substrate of the metal mesh;
adding a sterilization layer on the ferroelectric adsorption layer;
combining the sterilization layer and the surface of the ferroelectric adsorption layer in a chemical bond form through rapid thermal annealing;
and (5) obtaining the filter screen after the rapid thermal annealing is finished.
7. The method of claim 6, wherein the metal substrate is a heavy metal.
8. The method of claim 7, wherein the heavy metal is copper.
9. The method of claim 6, wherein the biocidal layer is a titanium dioxide layer.
10. An air filtering method using the air filtering device according to any one of claims 1 to 4, the method comprising:
applying a reverse direct pulse voltage after the power supply device applies the forward pulse voltage to the filter screen for a certain time; wherein the duration time of the forward pulse voltage is 0.1 s-60 s;
activating the adsorption capacity of the ferroelectric adsorption layer through the voltage provided by the power supply device, and adsorbing microorganisms in air input from the air inlet;
catalyzing the sterilizing capability of the sterilizing layer through ultraviolet rays emitted by the ultraviolet light source, and sterilizing the microorganisms adsorbed on the filter screen;
and reflecting the ultraviolet rays to the filter screen through the reflector.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022211769A3 (en) * | 2021-04-03 | 2022-11-17 | A.Ü.Strateji̇ Geli̇şti̇rme Dai̇resi̇ Başkanliği | Sterilization cabinet for electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080564A (en) * | 1975-10-02 | 1978-03-21 | Matsushita Electric Industrial Co., Ltd. | Humidity sensitive resistor device |
| CN2622600Y (en) * | 2003-06-03 | 2004-06-30 | 何冠东 | Combined air cleaner of central air conditioner |
| CN1785484A (en) * | 2005-11-01 | 2006-06-14 | 深圳清华大学研究院 | Microwave assisted plasma catalytic air purification method and purification device |
| CN103949343A (en) * | 2014-05-08 | 2014-07-30 | 汉王科技股份有限公司 | Air purification device |
| CN108786806A (en) * | 2017-04-27 | 2018-11-13 | 北京纳米能源与系统研究所 | Photochemical catalyst and photocatalyst film and the preparation method and application thereof |
| CN210921638U (en) * | 2019-09-06 | 2020-07-03 | 广东粤能净环保科技有限公司 | Medical air sterilizing purifier |
-
2020
- 2020-07-14 CN CN202010677792.1A patent/CN111912046B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4080564A (en) * | 1975-10-02 | 1978-03-21 | Matsushita Electric Industrial Co., Ltd. | Humidity sensitive resistor device |
| CN2622600Y (en) * | 2003-06-03 | 2004-06-30 | 何冠东 | Combined air cleaner of central air conditioner |
| CN1785484A (en) * | 2005-11-01 | 2006-06-14 | 深圳清华大学研究院 | Microwave assisted plasma catalytic air purification method and purification device |
| CN103949343A (en) * | 2014-05-08 | 2014-07-30 | 汉王科技股份有限公司 | Air purification device |
| CN108786806A (en) * | 2017-04-27 | 2018-11-13 | 北京纳米能源与系统研究所 | Photochemical catalyst and photocatalyst film and the preparation method and application thereof |
| CN210921638U (en) * | 2019-09-06 | 2020-07-03 | 广东粤能净环保科技有限公司 | Medical air sterilizing purifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022211769A3 (en) * | 2021-04-03 | 2022-11-17 | A.Ü.Strateji̇ Geli̇şti̇rme Dai̇resi̇ Başkanliği | Sterilization cabinet for electronic equipment |
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| CN111912046B (en) | 2021-12-31 |
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