KR100502838B1 - Air treatment apparatus using photocatalytic filter and adsorption photocatalytic filter and use thereof - Google Patents

Abstract

According to the present invention, a housing 12 having a predetermined space, an air inlet 2 provided at one side of the housing 12, and air introduced from the outside of the housing 12, air introduced from the air inlet 2 is provided. At least one photocatalyst filter (6) for oxidatively decomposing contaminants such as odors and microorganisms in the photocatalytic oxidation reaction, and oxidatively decomposing the contaminants in the photocatalytic oxidation reaction and at least two photocatalytic oxidation reactions. At least one adsorbent photocatalyst filter 8 for adsorbing secondary pollutants, at least one lamp 10 for irradiating light to the photocatalyst filter 6 and the adsorbent photocatalyst filter 8 to cause a photocatalytic oxidation reaction, A power supply 16 for supplying current to the lamp 10 and an air supply for discharging the air treated by the photocatalytic oxidation to the outside It relates to an air purification system comprising: a sphere (4).

According to the present invention, the air purifier is applied to an air pollutant treatment system, an air conditioner, an air conditioning system, an air conditioning duct, and the like to remove odors and microorganisms present in the air from the outside.

Description

Air purification apparatus using photocatalyst filter and adsorptive photocatalyst filter and its use {air treatment apparatus using photocatalytic filter and adsorption photocatalytic filter and use}

The present invention relates to an air purifying apparatus for purifying polluted air, and more particularly, may be used in an air conditioner or an air conditioning system such as an air pollutant treatment system, an air purifier, an air conditioner for a home or a vehicle, a ventilation fan, or the like. A photocatalyst filter and an adsorptive photocatalyst filter are installed in an air purifier, and a lamp for irradiating light is irradiated to the photocatalyst filter and the adsorptive photocatalyst filter to irradiate light to cause odors and microorganisms present in the air flowing into the air purifier. It is about treating pollutants in.

Modern people spend 90% of their time indoors, and while they are indoors, they are exposed to various meteorological pollutants such as volatile organic compounds, radon and biological organisms. Therefore, purifying the indoor air and supplying clean air to the room is considered to be very important in modern life.

In particular, modern buildings are becoming more serious due to air pollution, building the exterior structure of the building more tightly, using less external air for heating, ventilation, and air conditioning systems, and operating a closed air conditioning system. In consideration of the above, supplying clean air to the inside of a building or the interior of a car has emerged as an important problem.

In view of this reality, recently, various types of filters have been installed in the air conditioning system to remove contaminants such as fine dust particles, odors and bacteria in the air.

In the case of a specific air conditioning system, in order to remove contaminants such as fine particles, odors and bacteria, a pre-filter, a carbon filter, a HEPA (High Efficiency Particulate Air Filter), and a dust collector are installed inside the air conditioning system. However, in the case of an air conditioning system in which the carbon filter is installed, it does not permanently remove fine dust particles, odors and bacteria, but collects contaminants such as fine dust particles, odors and bacteria with a specific medium, that is, a filter. As a certain time there is a problem that the efficiency is reduced.

On the other hand, as a method for removing the biological contaminants, such as bacteria, has been widely used in the past to eradicate bacteria, etc. by using an ultraviolet lamp, but the method using the ultraviolet lamp only removes bacteria and the like and removes bad smells. There is a problem that cannot be done.

In order to solve the above problems, there is increasing interest in a method of removing contaminants and odors using a photocatalyst, which is one of advanced oxidation techniques.

The photocatalytic oxidation reaction is generated by electrons and holes generated when light energy above band gap energy is irradiated to the photocatalyst, and the gas phase adsorbed on the surface of the photocatalyst by the strong oxidizing power of radicals (· OH) produced by the holes. It refers to a reaction in which a liquid organic matter is decomposed.

That is, the photocatalyst exhibits catalytic activity by absorbing light energy, and oxidatively decomposes environmental pollutants with the strong oxidizing power generated at this time. Materials for inducing the photocatalytic reaction include TiO ₂ , ZnO ₂ , ZnO, SrTiO ₃ , CdS, GaP, InP, GaAs, BaTiO ₃ , KNbO ₃ , Fe ₂ O ₃ , Ta ₂ O ₅ , WO ₃ , SnO ₂ , Bi ₂ O ₃ , NiO, Cu ₂ O, SiO, SiO ₂ , MoS ₂ , InPb, RuO ₂ , CeO _2, etc. are used, and metals such as Pt, Rh, Ag, Cu, Sn, Ni, Fe, etc. are used for the photocatalyst. And these metal oxides can also be added and used. Among them, titanium dioxide (TiO ₂ ) is harmless to the human body, has excellent photocatalytic activity, has excellent light corrosion resistance, and is inexpensive.

Titanium dioxide absorbs and reacts with ultraviolet rays with a wavelength of 388 nm or less to generate electrons (conducting bands) and holes (gap bands) .In this case, the ultraviolet rays used for light are artificial lights such as fluorescent lamps, incandescent lamps, and mercury lamps. Can be used. The electrons and holes generated in the reaction recombine in 10 ^-12 to 10 ^-9 seconds, but are decomposed by the electrons and holes if contaminants or the like adsorb to the surface before recombination. The reaction mechanism of this photocatalyst is shown in the following reaction schemes 1 to 5.

^{_{TiO 2 + hν → e - +}} h +

^{_{e - + O 2 → O 2}} - radical

h ⁺ + -OH → -OH radical

O ₂ ^- radical + A (organic, bacteria, pollutant) → A '

-OH radical + B (organic, bacteria, pollutant) → B '

In order to provide a coating having a reaction characteristic of a photocatalyst capable of adsorbing and decomposing contaminants, research has been actively conducted to develop a coating sol containing a photocatalyst (titanium dioxide). In particular, a technique related to antifogging for coating a photocatalytic layer on a transparent substrate such as a mirror, a lens, and a plate glass to prevent the substrate from becoming cloudy or water droplets is disclosed in WO96 / 029375.

In addition, the use of titanium dioxide as a photocatalyst has been put to practical use in the field of antifouling, such as filters for air cleaners that deodorize odorous components such as tobacco smoke, filters for antibacterial in water or in the air, glass and tiles. The photocatalyst coated filter is also applicable to photocatalyst systems for decomposing volatile organic compounds.

Meanwhile, a technology for removing contaminants contained in air by installing a filter manufactured using the photocatalyst in an air conditioner has been developed, and the technique has the purpose of removing dust, odorous substances and bacteria in indoor air. The devices that make up the mainstream.

Among these technologies, Korean Patent Publication No. 2002-0059297 discloses a plurality of filter nets coated with titanium oxide vertically with respect to the air flow direction, and air for an air conditioner having a lamp on the bottom surface for irradiating light to the filter net. The purifier is described, and Korean Patent Publication No. 2001-0000790 is provided with at least one inside the duct of the air conditioner lamp for irradiating light between the antibacterial filter and the antibacterial filter for purifying the contaminated air introduced from the outside It is described a method for removing E. coli, Legionella and mold strains present in the contaminated air flowing into the duct.

On the other hand, the Republic of Korea Utility Model Registration No. 20-0239591 describes an air purifier for air conditioning equipped with a photocatalyst coated filter and a lamp for irradiating light, and the Republic of Korea Utility Model Publication No. 2000-0004506 is coated with titanium oxide A device for removing malodorous substances and bacteria contained in the air by irradiating ultraviolet rays to the aluminum mesh has been described.

On the other hand, in order to effectively remove environmental pollutants and odors using photocatalysts, it is necessary to increase the surface area of photocatalysts or to increase the intensity of light. In particular, filters for air conditioners such as air cleaners and air conditioners to remove odorous substances, etc. Since the processing time requires about 10 ^-3 seconds, the development of an efficient system configuration having high adsorption power and photocatalytic activity at the same time is urgently required.

In addition, since the photocatalytic reaction is a surface reaction, research and development of a technology capable of adsorbing a large amount of organic pollutants or odorous substances on the surface of the photocatalyst and the construction of an efficient system using the same are required.

Therefore, the present inventors have continued research in consideration of the above-described problems of the prior art, applying a photocatalyst filter coated with a photocatalyst and an adsorptive photocatalyst filter coated with a photocatalyst and an adsorbent to an environmental treatment system, thereby providing excellent adsorption and photocatalytic activity. By developing the device, the present invention has been completed.

The present invention was derived to solve the above problems, the photocatalyst filter for oxidizing and removing odors and bacteria in the air flowing into the air conditioning system and the secondary pollutants generated by the instant photocatalytic reaction Provided is an adsorptive photocatalyst filter that prevents detachment.

The present invention also provides an air purifying apparatus in which the above-described photocatalyst filter and the adsorptive photocatalyst filter are installed horizontally with respect to the flow direction of air, and a lamp for irradiating light to the photocatalyst filter and the adsorptive photocatalyst filter.

In addition, the present invention provides a method for treating air containing contaminants such as odors and microorganisms such as bacteria and mold by using a horizontal multi-stage filter device provided with the photocatalyst filter, the adsorptive photocatalyst filter and a lamp.

In one aspect, the present invention is a housing 12 having a predetermined space, the air inlet (2), which is provided on one side of the housing 12 inlet air from the outside of the housing 12, the air inlet (2) At least one photocatalyst filter (6) for oxidatively decomposing contaminants such as odors and microorganisms present in the air from the photocatalytic oxidation reaction, and oxidatively decomposing the contaminants in the photocatalytic oxidation reaction and at the same time At least one lamp for irradiating at least one adsorbent photocatalyst filter 8, the photocatalyst filter 6 and the adsorbent photocatalyst filter 8 to adsorb secondary contaminants generated by 10, a power supply 16 for supplying current to the lamp 10 and the air treated by the photocatalytic oxidation reaction is discharged to the outside Characterized by comprising an air outlet (4) for group.

In another aspect, the present invention is introduced into the air inlet (2) formed on one side of the housing 12, the current is applied to the power supply unit 16 is connected to the outside of the housing 12 The electric current is supplied to the lamp 10 connected to the power supply unit 16, light is generated from the lamp 10 by the supplied current, and the light generated by the lamp 10 is transferred to the photocatalyst filter 6. ) And irradiating the surface of the adsorptive photocatalyst filter 8 to generate a photocatalytic oxidation reaction, oxidatively decomposing contaminants present in the contaminated air introduced into the air inlet 2 by the photocatalytic oxidation reaction, and By adsorbing the secondary pollutants generated by the adsorbent photocatalyst filter 8 to completely oxidatively decompose the air treated by the photocatalyst filter 6 and the adsorptive photocatalyst filter 8 to the air outlet 4. Shipping is characterized by the contaminated air treatment method comprising.

The photocatalyst filter of the present invention is prepared by coating a photocatalyst on the surface of the substrate, and may be used as long as it is a photocatalyst that exhibits photoactivity on the substrate. Preferably, the photocatalyst filter is a sol-gel method using Ti alkoxide as a starting material. After the thin film is coated on the substrate by a dipping method or a spray method, the prepared photocatalyst may be heat treated at 450 to 500 ° C. for 30 minutes.

The adsorptive photocatalyst filter according to the present invention has a function of adsorbing and oxidizing and decomposing secondary pollutants generated by photocatalytic oxidation as well as a function of photoactivity when light is irradiated, and a solvent and a photocatalyst. , Photocatalytic coating sol consisting of inorganic adsorbents, metal compounds and binders and the like by dipping or spraying a thin film on the substrate and is prepared by curing for 5 to 15 minutes at 80 ℃ or less.

Here, the term "substrate" may be used by coating the photocatalyst coating sol, for example, filters required for various carriers or various water treatment and air pollution prevention facilities requiring effects such as antibacterial, deodorization, pollution prevention, Any metal, alloy, glass, plastic, or the like may be used, but as a substrate that can be used as a photocatalyst filter, a photocatalyst coating film is formed on the substrate by dipping or spraying, and then fired at a temperature of 450 to 500 ° C. In view of the above, a metal mesh or ceramic prepared in the form of a mesh of a metal that can withstand the above temperature can be used, and preferably, an aluminum mesh is preferable.

On the other hand, the substrate that can be used as the adsorptive photocatalyst filter is any substrate that can withstand the curing temperature of 80 ℃ because it is cured to a temperature of 80 ℃ or less after a thin film coating on the substrate by a sol for the photocatalyst coating or spray method It may be used. Preferably, there are metal meshes, ceramics and plastics such as polypropylene, polyethylene terephthalate (PET), polyethylene, and nonwoven fabric, and more preferably polyethylene or polypropylene.

The photocatalyst filter according to the present invention refers to a substrate coated with a photocatalyst as a main component, and is intended to remove contaminants contained in the air by photocatalytic oxidation of the photocatalyst, and in the case of the adsorptive photocatalyst filter, The purpose is to have a photoactive and adsorption at the same time by coating the substrate with a material having the adsorption performance. Therefore, any one suitable for the purpose of the photocatalyst filter and the adsorptive photocatalyst filter can be used as the photocatalyst filter and the adsorptive photocatalyst filter of the present invention.

On the other hand, the photocatalyst coating sol according to the present invention for producing the adsorptive photocatalyst filter includes a photocatalyst, an inorganic adsorbent, an inorganic binder, and an organic solvent, and optionally include a metal oxide.

Photocatalysts according to the present invention are generally photoactive metal oxides, namely TiO ₂ , ZnO ₂ , ZnO, CaTiO, WO ₃ , SnO ₂ , MoO ₃ , Fe ₂ O ₃ , InP, GaAs, BaTiO ₃ , KNbO ₃ , Fe ₂ O ₃ , and Ta ₂ O ₅ can be used, with preference being given to TiO ₂ or ZnO.

Meanwhile, the inorganic adsorbent may be used as long as it is a highly adsorbent inorganic material capable of adsorbing pollutants such as odorous substances and microorganisms during the photocatalytic reaction. In particular, silicates, talc, diatomaceous earth, It is preferable to use a zeolite carrying silver or copper ions.

As the inorganic binder, an isopropoxide compound, a silane compound, or the like may be used, and in particular, an isopropoxide compound such as titanium isopropoxide is preferably used.

The organic solvent may be an alcohol having a lower alkyl group, it is particularly preferable to use ethanol or isopropanol.

The metal compound may be used as long as it has a property of enhancing antibacterial function, and in particular, a copper compound such as copper (II) acetylacetonate, and silver acetate (Silver Acetate). It is preferable to use a silver compound or the like.

On the other hand, the photocatalyst filter prepared by coating the photocatalyst on the substrate and / or the adsorptive photocatalyst filter prepared by coating the photocatalyst coating sol on a substrate may provide a predetermined space having an inlet and an outlet through which air may be introduced and discharged. It is possible to manufacture an air purifying apparatus by installing a plurality in the horizontal direction with respect to the air flow direction inside the housing having. At this time, the inner side of the housing having the predetermined space is provided with a lamp for irradiating light to the photocatalyst filter and the adsorptive photocatalyst filter.

In this case, the lamp irradiates light to the photocatalyst filter and the adsorptive photocatalyst filter, and any lamp may be used as long as the photocatalyst generates a light sufficient to generate a photocatalytic oxidation reaction, preferably ultraviolet light. The lamp is good.

"Air purifier" according to the present invention is an air movement system such as a car air conditioning system, indoor air purifier, home and industrial air conditioning system, air conditioning system for removing plant growth harmful substances in house, building air conditioning system, etc. A device that is installed in a path and removes contaminants such as odors and microorganisms existing in the air passing through the air purifier is collectively referred to.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an air purifier according to the present invention, FIG. 2 is a cross-sectional view of the air purifier according to the present invention, and FIG. 3 is a road showing the result of treating trichloroethylene using the air purifier according to the present invention. Explain together.

1 to 2, the air purifier 14 according to the present invention is provided with a housing 12 having a predetermined space, one side of the housing 12 is air from the outside of the housing 12 At least one photocatalyst filter 6 for oxidatively decomposing contaminants such as odors and microorganisms in the air introduced from the air inlet 2, the air introduced from the air inlet 2, and photocatalytic oxidation, and the contaminants At least one adsorptive photocatalyst filter (8), photocatalyst filter (6) and adsorbent photocatalyst filter (8) for oxidatively decomposing the photocatalytic oxidation reaction and simultaneously adsorbing secondary pollutants generated by the photocatalytic oxidation reaction. At least one lamp 10 for irradiating light to generate a photocatalytic oxidation reaction and a ball for discharging air treated by the photocatalytic oxidation reaction to the outside Consists of an outlet (4).

Here, when the degree of contamination of the contaminated air is low, for example, the photocatalyst filter 6 provided in the housing 12 of the air purifier 14 may be, for example, only the adsorptive photocatalyst filter 8. 14) If the level of pollution is low enough to remove the pollutants entering the inside, it may be omitted.

In addition, the air purifier 14 according to the present invention may further include a dust collecting filter to remove fine dust and the like present in the contaminated air introduced into the air purifier 14.

The photocatalyst filter 6 and / or the adsorptive photocatalyst filter 8 according to the present invention are manufactured in a form in which the light irradiated from the lamp 10 can pass, for example, in the form of a mesh, but is not limited to the overall shape. According to the shape of the housing 12 constituting the shape of the air purifier 14, the shape can be varied, preferably considering the duct constituting the general air conditioning system made of a square. Square is good.

Inside the housing 12, a fastening means (not shown) for mounting the photocatalyst filter 6 and / or the adsorptive photocatalyst filter 8, for example, a groove is provided to the photocatalyst filter 6 And / or one side of the adsorptive photocatalyst filter 8 is inserted and fixed, and the photocatalyst filter 6 and / or the adsorptive photocatalyst filter 8 have air introduced into the housing 12. At least one or more stacked horizontally with respect to the direction to be prevented, the movement of the air by the photocatalytic filter 6 and / or the adsorptive photocatalyst filter 8 is prevented, and the light generated from the lamp 10 The photocatalyst filter 6 and / or the adsorptive photocatalyst filter 8 surface can be effectively irradiated.

In particular, the air purifier 14 according to the present invention is installed by at least one or more of the photocatalyst filter 6 or the adsorptive photocatalyst filter 8 in the housing 12 of the air purifier 14, the air purifier (14) can be configured, but preferably, the photocatalyst filter and the adsorptive photocatalyst filter 8 are laminated and installed together in the housing 12. In addition, a dust collecting filter may be further included in the housing 12 of the air purifier 14 as needed.

The dust collecting filter is for removing fine dust, dust, dust, etc. present in the contaminated air flowing into the air purifier 14, which device can remove the fine dust, dust, dust, etc. In general, a carbon filter, a HEPA filter (High Efficiency Particulate Air Filter) can be used, and the same effect can be achieved by installing a dust collector to adsorb and remove dust using static electricity.

On the other hand, the oxidation reaction of the photocatalyst increases the activity in proportion to the intensity of light irradiating the photocatalyst and the area of the surface coated with the photocatalyst, the housing 12 of the air purifier 14 having a limited space Considering the number of photocatalyst filters 6 and adsorptive photocatalyst filters 8 that can be inserted into and fixed in the housing 12, it is possible to control the intensity of light generated from the lamp 10. It is easy to control the activity of the reaction. Thus, at least one lamp 10 is provided to increase the photocatalytic oxidation reaction inside the housing 12, wherein the lamp 10 transmits light to the surface of the photocatalyst filter 6 and the adsorptive photocatalyst filter 8. It is preferable to be installed on one side of the housing 12 so as to irradiate a large amount, and it is preferable to install between the photocatalyst filter 6 and the adsorptive photocatalyst filter 8 stacked.

Here, the lamp 10 is connected to the power supply unit 16 and is configured to emit light when the power supply unit 16 supplies the power, and the power supply unit 16 is the lamp 10 It may be configured in any form as long as it is intended to supply power.

On the other hand, the photocatalyst filter 6 is coated on the surface of the substrate with a photocatalyst as a main component, and compared with the adsorptive photocatalyst filter 8 containing the photocatalyst, an inorganic adsorbent, an inorganic binder, and optionally a metal oxide. The photocatalyst filter 6 is more preferably installed closer to the lamp 10 than the adsorptive photocatalyst filter 8, and the adsorptive photocatalyst filter 8 has better adsorption than the photocatalyst filter 6. Therefore, the secondary pollutant, for example, is installed to be spaced farther from the lamp 10 than the photocatalyst filter 6 so that some of the pollutants treated by the rapid oxidation reaction generated by the photocatalyst filter 6 are reduced. And adsorbing Hosgen to completely oxidize the secondary contaminant over a sufficient time to suppress the generation of contaminants.

On the other hand, in some cases, the photocatalyst filter 6 and the adsorptive photocatalyst filter 8 may be sequentially stacked on each other, which is determined by the installer's choice.

Referring to the operation mechanism of the air purifying device 14 having such a configuration as follows.

First, the contaminated air introduced into the air inlet 2 formed at one side of the housing 12 of the air purifier 14 is provided with a plurality of photocatalyst filters 6 and an adsorptive photocatalyst filter installed inside the housing 12. Pass (8). At this time, a current is applied to the power source 16 provided on one side of the housing 12, and the lamp 10 installed to the power source 16 generates light to generate the light and the photocatalyst filter 6 and the adsorptive photocatalyst filter. The light is irradiated to (8).

On the other hand, on the surfaces of the photocatalyst filter 6 and the adsorptive photocatalyst filter 8 irradiated with light, contaminants present in the contaminated air introduced into the air inlet 2 are absorbed by the photocatalyst filter 6 and the adsorptive photocatalyst filter ( Oxidative decomposition is achieved by contact with and / or adsorption on the surface of 8) for photocatalytic oxidation.

Then, some of the oxidatively contaminated contaminants are reduced to produce secondary contaminants, which are adsorbed on the adsorptive photocatalyst filter 8 and completely oxidatively decomposed by a long time photocatalytic oxidation reaction.

Then, the clean air treated by the photocatalytic oxidation is discharged to the outside through the air outlet 4 provided on one side of the housing 12.

Hereinafter, the present invention will be described in detail through examples. However, the following examples are only for illustrating the present invention in detail and do not limit the scope of the present invention by the examples.

<Example 1>

Preparation of Sol for Photocatalyst Coating

5 wt% of titanium isopropoxide [Junsei Chemical Co., Ltd.], 78.8 wt% of anhydrous ethanol and 0.2 wt% of hydrochloric acid were mixed, followed by stirring at 1200 rpm for 20 minutes at room temperature. Then 10% by weight of titanium dioxide powder [Degussa P25, Germany] was added.

6 wt% of talc [DUKSAN PURE CHEMICAL Co., Ltd.] was added to the mixed solution, followed by sonication for 30 minutes in an ultrasonic apparatus [BRANSON Ultrasonic Co., DHA-1000] to prepare a photocatalyst coating sol.

<Example 2>

Preparation of Sol for Photocatalyst Coating

5 wt% of titanium isopropoxide [Junsei Chemical Co., Ltd], 78.5 wt% of anhydrous ethanol and 0.2 wt% of hydrochloric acid were mixed, followed by stirring at 1200 rpm for 20 minutes at room temperature. Then 10% by weight of titanium dioxide powder [Degussa P25, Germany] was added.

After adding 6% by weight of talc [DUKSAN PURE CHEMICAL Co., Ltd.] to the mixed solution and sonicating for 30 minutes or more in an ultrasonic apparatus [BRANSON Ultrasonic Co., DHA-1000] 0.3% by weight of copper acetate Hydrates [Junsei chemical. Co., Ltd., Japan] to prepare a photocatalyst coating sol.

<Example 3>

Preparation of Sol for Photocatalyst Coating

A photocatalyst coating sol was prepared in the same manner as in Example 1, but using 5% by weight of diatomaceous earth [DUKSAN PURE CHEMICAL Co., Ltd.] instead of 6% by weight of talc.

<Example 4>

Preparation of Sol for Photocatalyst Coating

The same method as in Example 2, except that 0.3% by weight of silver acetate instead of 0.3% by weight of copper acetate hydrate [Junsei Chem. Co., Ltd., Japan] to prepare a photocatalyst coating sol.

Example 5

Preparation of Sol for Photocatalyst Coating

After mixing 3% by weight of titanium dioxide [Degussa P25, Germany], 93% by weight of ethanol, 0.2% by weight of hydrochloric acid and stirred at 1200rpm at room temperature for 20 minutes.

3.8% by weight of magnesium silicate [Aldrich, USA] was added to the solution, followed by sonication for 30 minutes in an ultrasonic apparatus [BRANSON Ultrasonic Co., DHA-1000] and 0.3% by weight of copper acetylacetonate [Junsei Chem. Co., Ltd., Japan] to prepare a photocatalyst coating sol.

<Example 6>

Preparation of Photocatalyst Filter

Titanium isopropoxide [Junsei Chemical Co., Ltd] was coated on a metal mesh [Al Sarong 4x8mm, 0.4T, Brother Metallas, Korea] at room temperature by spray method (1.5 diameter, pressure: 4KG) and then 120 to 150 Drying to a temperature of 캜 gave a photocatalyst filter.

<Example 7>

Preparation of Adsorbent Photocatalyst Filter

The coating sol prepared in Example 1 was coated on a polyethylene filter [SW80M, Shinwoo, Korea] at room temperature with a spray method [1.5 diameter, pressure: 4KG] and dried at a temperature of 60 ° C. to obtain an adsorptive photocatalyst filter.

<Example 8>

Preparation of Adsorbent Photocatalyst Filter

It was carried out in the same manner as in Example 7, except that the coating sol prepared in Example 2 was used instead of the coating sol prepared in Example 1.

Example 9

Preparation of Adsorbent Photocatalyst Filter

It was carried out in the same manner as in Example 7, except that the coating sol prepared in Example 2 was used instead of the coating sol prepared in Example 1.

<Example 10>

Preparation of Adsorbent Photocatalyst Filter

A coating sol prepared according to Example 3 was used instead of the coating sol prepared according to Example 1, except that it was prepared in Example 7.

<Example 11>

Preparation of Adsorbent Photocatalyst Filter

A coating sol prepared according to Example 4 was used instead of the coating sol prepared according to Example 1, except that it was prepared in Example 7.

<Example 12>

Preparation of Adsorbent Photocatalyst Filter

The same method as in Example 7, except that instead of the coating sol prepared in Example 1, a coating sol prepared in Example 5 was used.

Example 13

Manufacture of air purifier

As shown in Figs. 1 and 2, a black light lamp (wavelength 300 to 368 nm, maximum wavelength 400 nm) [4W BLB, Sankyo denki, Japan] is longitudinally disposed in the middle of the stainless housing 12 having a volume of 27L. The three were installed horizontally.

Next, two photocatalyst filters prepared in Example 7 were installed above and below the black light lamp, and then two adsorptive photocatalyst filters prepared in Example 8 were laminated to the outside of the photocatalyst filter.

Then, power is applied to the black light lamp to irradiate light to the photocatalyst filter and the adsorptive photocatalyst filter inside the stainless housing, and trichloroethylene (TCE) at an initial concentration of 610 ppm and an inflow flow rate of 4 L / min. It was injected internally, and the decomposition rate of the trichloroethylene was measured by a FTIR spectrometer [Perkin Elmer, Spectrum one FT-IR spectrometer].

The result is shown in FIG.

Comparative Example 1

The photocatalyst filter prepared in Example 7 was stacked on top and bottom of the black light lamp provided in the housing of the air cleaner using the photocatalyst filter instead of the adsorptive photocatalyst filter. The decomposition rate of trichloroethylene was measured by a FTIR spectrometer [Perkin Elmer, Spectrum one FT-IR spectrometer].

The result is shown in FIG.

Comparative Example 2

The adsorption photocatalyst filter prepared in Example 8 is stacked on top of and under the black light lamp provided in the housing of the air cleaner by using the adsorption photocatalyst filter instead of the photocatalyst filter. The decomposition rate of trichloroethylene was measured by a FTIR spectrometer [Perkin Elmer, Spectrum one FT-IR spectrometer].

The result is shown in FIG.

As shown in FIG. 3, the removal efficiency of trichloroethylene was increased when the adsorptive photocatalyst filter was used than when only the photocatalyst filter was used. As shown in Example 13, the air purifier was mixed with the photocatalyst filter and the adsorptive photocatalyst filter. When configured, it was confirmed that the removal efficiency is increased.

In particular, when a photocatalyst filter having only pure photocatalytic activity was used, a predetermined amount of trichloroethylene was decomposed and removed, but an intermediate Hosgen peak (C-Cl: 856cm-1, C = O: 1825cm-1) was detected. This means that the photocatalyst filter decomposes trichloroethylene, which is a specific organic matter, but has a disadvantage in that harmful products (hosgene) are discharged into the air.

Therefore, since it is not easy to completely remove contaminants in the air purifying device using only the photocatalyst filter, the adsorbent photocatalyst filter having excellent adsorption power is used together with the photocatalyst filter to adsorb the hosgene discharged by the photocatalyst filter onto the adsorptive photocatalyst filter. The photocatalytic oxidation can be slowly decomposed to completely remove contaminants.

According to the present invention, a plurality of photocatalyst filters and / or adsorptive photocatalyst filters are installed in the air purifier so as to be horizontal in the air flow direction, thereby providing a photocatalyst installed perpendicular to the air flow direction in the existing air purifier. Compared to the filter, the resistance to disturb the flow of air can be minimized, and the secondary pollutant generated by the photocatalytic oxidation reaction is adsorbed to the adsorptive photocatalyst filter to completely oxidatively decompose and thus not to release polluted air contained in the air. have.

On the other hand, the air purifier according to the present invention is applied to the air pollutant treatment system, air conditioner, air conditioning system, air conditioning ducts, etc. has the effect of removing odors and microorganisms in the air flowing from the outside.

1 is a block diagram of an air purifier according to the present invention;

2 is a cross-sectional view of an air purifier according to the present invention;

3 is a view showing the result of treating trichloroethylene using an air purifier according to the present invention.

<Description of the symbols for the main parts of the drawings>

2: air inlet 4: air outlet

6: photocatalyst filter 8: adsorptive photocatalyst filter

10 lamp 12 housing

14 air purifier 16 power supply

Claims (9)

A housing 12 having a predetermined space, an air inlet 2 provided at one side of the housing 12, in which air is introduced from the outside of the housing 12, and present in air introduced from the air inlet 2; One or more photocatalyst filters (6) for oxidatively decomposing contaminants such as odors and microorganisms by photocatalytic oxidation, and secondary contaminants generated by the photocatalytic oxidation at the same time by oxidatively decomposing the contaminants by photocatalytic oxidation. Photocatalytic oxidation by irradiating light to at least one adsorptive photocatalyst filter (8), the photocatalyst filter (6) and the adsorptive photocatalyst filter (8) prepared by coating a photocatalyst, inorganic adsorbent and inorganic binder mixture on the surface of the substrate for adsorption One or more lamps 10, a power supply 16 for supplying current to the lamps 10, and the photocatalytic oxidation The air purification system comprising the air outlet port 4 for discharging the air to the outside ridoen. The method of claim 1, An air purifier, further comprising a photocatalyst filter (6) for causing a photocatalytic oxidation reaction on one side of the housing (12) having the predetermined space. The method of claim 1, And the photocatalyst filter (6) and the adsorptive photocatalyst filter (8) are installed horizontally in the flow direction of the polluted air flowing into the air inlet (2). The method of claim 1, The photocatalyst filter is an air purifier, characterized in that manufactured by coating a photocatalyst on the surface of the substrate. delete An air conditioner comprising the air purifier according to claim 1. An air cleaning device comprising the air purifying device according to claim 1. An air conditioner comprising the air purifier according to claim 1. The contaminated air flows into the air inlet 2 formed at one side of the housing 12, and a current is applied to the power supply unit 16 connected to the outside of the housing 12 so as to be connected to the power supply unit 16. A current is supplied to the lamp 10, and light is generated from the lamp 10 by the supplied current, and the light generated by the lamp 10 is transferred to the photocatalyst filter 6 and the adsorptive photocatalyst filter 8. Irradiates the surface of the to generate a photocatalytic oxidation reaction, to oxidatively decompose contaminants present in the contaminated air introduced into the air inlet (2) by the photocatalytic oxidation reaction, and to remove secondary pollutants generated by the oxidative decomposition. Adsorption by the adsorptive photocatalyst filter (8) to completely oxidatively decompose and discharge the air treated by the photocatalyst filter (6) and the adsorptive photocatalyst filter (8) to an air outlet (4) To contaminated air processing method using the air purifying apparatus according to claim 4.