JP4107938B2 - Air purification device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air purification device using a photocatalyst, and more particularly to an air purification device capable of expanding the surface area of a photocatalyst disposed inside the air purification device.
[0002]
[Prior art]
Photocatalysts such as titanium oxide (TiO ₂ ) are activated when irradiated with ultraviolet rays to produce a strong redox effect, and harmful compounds and pollutants such as nitrogen oxides (NO _X ) and sulfur oxides (SO _X ) Therefore, various air purifying apparatuses using this photocatalyst have been proposed.
FIG. 12 shows an example of such a conventional air purifying device. The air purifying device 70 forms a photocatalyst 78 in the form of a film on the inner wall surface of a casing 76 having an intake port 72 and an exhaust port 74. An ultraviolet lamp 80 serving as a light source for activating the photocatalyst is disposed in the casing 76 while being deposited.
In this air purification device 70, the air introduced into the housing 76 is purified by irradiating the photocatalyst 78 with an ultraviolet ray generated by the ultraviolet lamp 80 and activating it.
[0003]
[Problems to be solved by the invention]
By the way, decomposition of harmful compounds, pollutants and the like by the photocatalyst is an effect caused by contact of these harmful compounds and pollutants with the photocatalyst. Therefore, in order to improve the ability of the photocatalyst to purify air and water, it is desirable to increase the surface area of the photocatalyst as much as possible.
However, in the above-described conventional air purification device 70, since the photocatalyst 76 is disposed in the form of a film on the inner wall surface of the casing 76, there is a limit to the expansion of the surface area of the photocatalyst 76. For example, the casing 76 Even if the photocatalyst 76 is disposed on the entire inner wall of the photocatalyst, the surface area of the photocatalyst 76 could not be increased beyond the surface area of the inner wall of the housing 76.
[0004]
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to realize an air purification device capable of expanding the surface area of a photocatalyst disposed inside the air purification device.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the air purifying apparatus according to claim 1, an ultraviolet lamp is housed in a casing having an intake port and an exhaust port, and an ultraviolet ray generated by the ultraviolet lamp is stored. Within the irradiation range, a sintering layer is formed on the surface of the fiber made of silica glass and sintered with the anatase-type titanium oxide penetrating into the fine pores of the silica glass, and further on the surface of the sintering layer. The photocatalyst carrier is formed by arranging a large number of fibrous bodies coated with a photocatalyst made of anatase-type titanium oxide in a standing state on the surface of the substrate.
[0006]
In the air purifying apparatus according to claim 1, a large number of fibrous bodies coated with a photocatalyst are applied in an upright state with respect to a substrate surface within an irradiation range of ultraviolet rays generated by an ultraviolet lamp. Since the photocatalyst carrier configured as described above is disposed, the surface area of the substrate on which the photocatalyst is disposed increases the surface integral of a large number of deposited fibrous bodies, and the photocatalyst is disposed on the surface of the substrate in the form of a film. Compared to the case, the surface area of the photocatalyst disposed inside the housing can be dramatically increased.
[0007]
Further, in the air purifying apparatus according to claim 2, the ultraviolet lamp is housed in a housing provided with an intake port and an exhaust port, and the outside of the airtight container made of an ultraviolet transmissive material constituting the ultraviolet lamp is provided. A sintering layer is formed on the surface of the fiber made of silica glass and sintered with anatase-type titanium oxide infiltrated into the fine pores of the silica glass. Further, on the surface of the sintering layer, anatase is formed. A large number of fibrous bodies coated with a photocatalyst made of a type of titanium oxide are deposited in an upright state on the outer surface of an airtight container.
[0008]
In the air purification device according to claim 2, since a large number of fibrous bodies coated with the photocatalyst are attached in an upright state to the outer surface of the airtight container constituting the ultraviolet lamp, the photocatalyst is provided. The surface area of the outer surface of the hermetic container to be increased will increase the surface integral of a large number of adhered fibrous bodies.As a result, compared to the case where the photocatalyst is disposed in the form of a film on the outer surface of the hermetic container, The surface area of the photocatalyst disposed inside the housing can be dramatically increased.
[0009]
Furthermore, in the air purifying apparatus according to claim 3, the ultraviolet lamp is housed in a housing having an intake port and an exhaust port, and silica is contained within an irradiation range of ultraviolet rays generated by the ultraviolet lamp. On the surface of the fiber made of glass, a sintering layer is formed by sintering anatase-type titanium oxide in the fine pores of silica glass. Further, on the surface of the sintering layer, anatase-type titanium oxide is formed. A photocatalyst carrier comprising a large number of fibrous bodies coated with a photocatalyst and deposited in a standing state on the surface of the substrate is disposed, and is made of an ultraviolet transmitting material constituting the ultraviolet lamp. the outer surface of the airtight container, the surface of the fibers made of silica glass, sintering layer is formed of titanium oxide of anatase in the micropores of the silica glass is sintered in a state of being penetrated Further, and wherein the surface of the sintering layer, the photocatalyst consisting of anatase type titanium oxide is a number of fibrous material comprising coated and deposited at upright position relative to the outer surface of the airtight container To do.
[0010]
In the air purification apparatus according to claim 3, a large number of fibrous bodies coated with a photocatalyst are deposited in an upright state on a substrate surface within an irradiation range of ultraviolet rays generated by an ultraviolet lamp. Since the photocatalyst carrier configured as described above is disposed, the surface area of the substrate on which the photocatalyst is disposed increases the surface integral of a large number of attached fibrous bodies, and the photocatalyst is disposed on the substrate surface in a film form. Compared to the case, the surface area of the photocatalyst disposed inside the housing can be dramatically increased.
Moreover, since many fibrous bodies coated with the photocatalyst are also applied to the outer surface of the airtight container of the ultraviolet lamp, the surface area of the photocatalyst disposed within the ultraviolet irradiation range can be further increased. it can.
[0011]
The sintered body according to any one of claims 1 to 3, wherein the fibrous body is formed by sintering on the surface of the fiber made of silica glass in a state where anatase-type titanium oxide is infiltrated into the fine pores of the silica glass. Further, the surface of the sintering layer is coated with a photocatalyst made of anatase type titanium oxide.
In this case, the photocatalyst and the fiber are bonded to each other through a sintering layer sintered in a state where the anatase type titanium oxide is infiltrated into the fine pores of the silica glass. Becomes very strong, the photocatalyst does not easily peel off, and is excellent in durability.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an air purification device according to the present invention will be described based on the drawings.
FIG. 1 is a schematic cross-sectional view of an air purification device 10 according to the present invention. This air purification device 10 has three ultraviolet lamps 14, two fans 16, and a photocatalyst supported inside a housing 12. The body 18 and the filter 20 are housed, and a drive unit 22 attached to the outer wall surface of the housing 12 is provided.
An intake port 24 for taking air into the housing 12 is formed on the lower surface of the housing 12, and an exhaust for releasing the air inside the housing 12 to the outside is formed on the upper surface of the housing 12. A mouth 26 is formed.
[0013]
As shown in FIG. 2, the ultraviolet lamp 14 includes a pair of substantially cylindrical straight pipe portions 28, 28 made of ultraviolet transmissive glass such as quartz glass, and a curved pipe portion that connects the straight pipe portions 28, 28 in communication with each other. 30 and an airtight container 34 composed of a sealing part 32 formed by melting and sealing the openings of the straight pipe parts 28, 28, and disposed in the vicinity of both end sealing parts 32 in the airtight container 34, respectively. A pair of discharge electrodes 36, 36 and a lead wire 38 connected to each discharge electrode 36 are provided.
The airtight container 34 is filled with an ultraviolet radiation gas obtained by mixing argon and mercury or an ultraviolet radiation gas mainly composed of xenon. Further, on the inner surfaces of the straight pipe portions 28 and 28 and the curved pipe portion 30 of the hermetic container 34, a phosphor layer 40 for ultraviolet wavelength conversion (see FIGS. 3 and 4) described later is formed.
The discharge electrode 36 is made of molybdenum, tungsten, or the like, and has a distal end portion exposed in the straight tube portion 28 and a proximal end portion embedded in the sealing portion 32 of the airtight container 34. One end of a lead wire 38 is connected to the proximal end portion of the discharge electrode 36 embedded in the sealing portion 32, and the other end of the lead wire 38 is led out of the hermetic vessel 34.
[0014]
3 and 4, the outer surfaces of the straight pipe portions 28 and 28 constituting the hermetic container 34 are coated with a photocatalyst 42 made of anatase type titanium oxide (TiO ₂ ). A number of elongated first fibrous bodies 44 (FIGS. 5 and 6) are attached in an upright state substantially vertically to the outer surfaces of the straight pipe portions 28, 28 via an adhesive 46. Yes. The first fibrous body 44 is formed by coating the surface of a fiber 48 such as a glass fiber or a resin fiber with a photocatalyst 42, and has a diameter of 5 to 50 μm and a length of about 20 to 5000 μm. Moreover, the space | interval of adjacent 1st fibrous bodies 44 is comprised with about 5-100 micrometers, and the density is high.
The photocatalyst 42 has a thickness of about 1 to 3 μm. As the method for coating the fiber 48 with the photocatalyst 42, various conventional methods can be used. For example, the fiber 48 such as glass fiber or resin fiber is immersed in a dispersion of the photocatalyst, and then dried and fired. Can be coated.
The first fibrous body 44 can be attached to the outer surfaces of the straight pipe portions 28 and 28 using an electrostatic flocking method. In this state, the first fibrous body 44 is implanted on the outer surfaces of the straight pipe portions 28 and 28 to which the adhesive 46 is applied in a state where the first fibrous body 44 is raised using static electricity.
The adhesive 46 is made of a material having ultraviolet transparency, such as an alkali silicate bond, an ethyl silicate bond, an alkoxy lane bond, an alkoxy lane bond partially containing an organic functional group, and an organic An inorganic binder such as an alkoxysilane bond obtained by reacting a polymer or a hybrid inorganic binder can be suitably used.
As described above, by arranging the photocatalyst 42 on the outer surface of the airtight container 34 of the ultraviolet lamp 14, the ultraviolet light generated by the ultraviolet lamp 14 can be efficiently irradiated onto the photocatalyst 42.
[0015]
The phosphor layer 40 is 300 particularly suitable for activating the photocatalyst 42 with ultraviolet light having a wavelength of less than 300 nm among various wavelengths emitted from the ultraviolet radiation gas by the discharge between the discharge electrodes 36 and 36. It is provided for conversion to ultraviolet light having a wavelength of ˜400 nm.
The phosphor layer 40 includes, for example, (CaZn) ₃ (PO ₄ ) ₂ : Tl, Ca ₃ (PO ₄ ) ₂ : Tl, SrB ₄ O ₇ : Eu, (Ba, Sr, Mg) ₃ Si ₂ O _7. : Pb, BaSi ₂ O ₅ : Pb, YPO ₄ : Ce, Ce (Mg, Ba) Al ₁₁ O ₁₉ , LaPO ₄ : Ce, and the like.
Thus, by providing the phosphor layer 40, among the various wavelengths of ultraviolet light emitted from the ultraviolet radiation gas and irradiated on the photocatalyst 42, a wavelength (300 nm that does not contribute much to the activation of the photocatalyst 42). UV light having a wavelength less than that is converted into ultraviolet light having a wavelength particularly suitable for activation of the photocatalyst 42 (300 to 400 nm), so that activation of the photocatalyst 42 can be promoted.
[0016]
The phosphor layer 40 may be formed on the outer surface of the straight pipe portions 28 and 28 constituting the airtight container 34. In this case, the adhesive 46 is applied to the surface of the phosphor layer 40 formed on the outer surface of the airtight container 34, and the first fibrous body 44 is applied via the adhesive 46. It ’s fine. Alternatively, an adhesive 46 mixed with the phosphor constituting the phosphor layer 40 is applied to the outer surface of the airtight container 34, and the first fibrous body is passed through the adhesive 46 mixed with the phosphor. 44 may be applied.
[0017]
In the ultraviolet lamp 14, when a discharge is generated between the pair of discharge electrodes 36, 36, the electrons collide with the ultraviolet radiation gas to generate ultraviolet rays having various wavelengths. The generated ultraviolet rays are irradiated onto the phosphor layer 40 to be converted into ultraviolet rays (300 to 400 nm) having a wavelength particularly suitable for the activation of the photocatalyst 42, and then transmitted through the airtight container 34 to the photocatalyst 42. Irradiated. As a result, the photocatalyst 42 is activated and air can be purified. As described above, since the adhesive 46 also has ultraviolet transparency, the adhesive 46 does not block the ultraviolet rays.
Since each said 1st fibrous body 44 is adhere | attached "substantially perpendicularly" with respect to the straight pipe part 28 and 28 outer surface, 1st fibrous bodies 44 may mutually cross and become intertwined. As a result, there is almost no shadow portion that is not exposed to ultraviolet rays when irradiated with ultraviolet rays. Therefore, the photocatalyst 42 of each first fibrous body 44 is sufficiently irradiated with ultraviolet rays, and the activation efficiency of the photocatalyst 42 is very high.
[0018]
The photocatalyst carrier 18 is attached to the inner wall surface of the housing 12 and is disposed so as to surround the three ultraviolet lamps 14. The photocatalyst carrier 18 includes a plurality of elongated first fibrous bodies coated with a photocatalyst 42 on the surface of a substrate 50 having a substantially corrugated cross section made of an appropriate material such as glass, resin, or metal, as shown in FIG. 44 is formed by adhering 44 in an upright state with respect to the surface of the base 50 through an adhesive 46.
This photocatalyst carrier 18 needs to be disposed within the irradiation range of the ultraviolet rays generated by the ultraviolet lamp 14 in order to activate the photocatalyst 42 on the surface of the first fibrous body 44.
[0019]
When the photocatalyst 42 on the surface of the first fibrous body 44 in the photocatalyst carrier 18 is irradiated with ultraviolet rays from the ultraviolet lamp 14, the photocatalyst 42 is activated to purify the air contacting the surface of the photocatalyst 42. It can be done.
The first fibrous body 44 is attached to the outer surface of the straight tube portion 28 of the ultraviolet lamp 14. As described above, each first fibrous body 44 is formed of the straight tube portions 28, 28. Part of the ultraviolet rays that have passed through the straight pipe portion 28 are placed between the first fibrous bodies 44 and 44 because they are deposited “substantially perpendicular” to the outer surface and at a predetermined interval. As a result, the photocatalyst 42 of the photocatalyst carrier 18 is irradiated. Further, the ultraviolet light that has passed through the bent tube portion 30 and the sealing portion 32 of the ultraviolet lamp 14 to which the first fibrous body 44 is not attached is also applied to the photocatalyst 42 of the photocatalyst carrier 18.
As shown in FIG. 7, a part of each first fibrous body 44 of the photocatalyst carrier 18 is attached to the surface of the substrate 50 in a state of being embedded in the adhesive 46, as described above. Since the adhesive 46 has ultraviolet transparency, the photocatalyst 42 on the surface of the first fibrous body 44 embedded in the adhesive 46 can be sufficiently irradiated with ultraviolet rays.
In addition, the photocatalyst carrier can also be configured by directly attaching the first fibrous body 44 to the inner wall surface of the housing 12, and in this case, the inner wall of the housing 12 is formed by the photocatalyst carrier. It will function as a “base”.
[0020]
Hereinafter, a procedure for performing an air purification process using the air purification device 10 will be described.
First, by supplying power from the drive unit 22 to the fan 16 and the ultraviolet lamp 14, the fan 16 is driven and the ultraviolet lamp 14 is turned on.
By driving the fan 16, external air is introduced into the housing 12 through the air inlet 24, and the first fiber of the ultraviolet lamp 14 is irradiated with the ultraviolet rays generated by the lighting of the ultraviolet lamp 14. The photocatalyst 42 on the surface of the filament 44 and the photocatalyst 42 on the surface of the first fibrous body 44 of the photocatalyst carrier 18 are activated.
The air introduced into the housing 12 comes into contact with the activated photocatalyst 42 in the process of rising toward the exhaust port 26 after dust and the like are removed by the filter 20, thereby Hazardous compounds and pollutants inside are decomposed and purified.
[0021]
In the air purification apparatus 10 of the present invention, a large number of first fibrous bodies 44 coated with the photocatalyst 42 are substantially perpendicular to the surface of the base 50 within the irradiation range of the ultraviolet rays generated by the ultraviolet lamp 14. Since the photocatalyst carrier 18 formed by being deposited in an upright state is disposed, the surface area of the substrate 50 on which the photocatalyst 42 is disposed increases the surface integral of the numerous first fibrous bodies 44 that are deposited. As a result, the surface area of the photocatalyst 42 to be arranged can be dramatically increased as compared with the case where the photocatalyst 42 is arranged on the surface of the substrate 50 in the form of a film. For example, the photocatalyst 42 has a surface area several thousand times greater than the surface area of the substrate 50 by appropriately adjusting the number, diameter, length, and interval between the first fibrous bodies 44 to be deposited. Can be arranged.
Moreover, in the air purification apparatus 10 of the present invention, a large number of first fibrous bodies coated with the photocatalyst 42 on the outer surfaces of the straight pipe portions 28 and 28 constituting the airtight container 34 of the ultraviolet lamp 14 are also provided. Since 44 is deposited, the surface area of the photocatalyst 42 disposed within the ultraviolet irradiation range can be further increased.
That is, a large number of first fibrous bodies 44 coated with the photocatalyst 42 were deposited in an upright state substantially perpendicular to the outer surfaces of the straight tube portions 28 and 28 of the airtight container 34 constituting the ultraviolet lamp 14. Therefore, the surface area of the outer surfaces of the straight pipe portions 28, 28 increases the surface integral of the many first fibrous bodies 44 deposited, and as a result, the photocatalyst 42 is formed on the outer surfaces of the straight pipe portions 28, 28. The surface area of the photocatalyst 42 disposed in the straight pipe portions 28 and 28 can be dramatically increased as compared with the case where the film is disposed in a film shape.
[0022]
As the photocatalyst 26, in addition to the above-mentioned titanium oxide, other metal oxides having a photocatalytic action such as ZnO, SrTiO ₃ , BaTiO ₃ , Fe ₂ O _{3 and the} like can be used. It is excellent in photocatalytic activity and can be most suitably used.
[0023]
In the air purification device 10 of the present invention, instead of the first fibrous body 44, the second fibrous body 60 whose surface is coated with the photocatalyst 42 as shown in FIGS. 10 and a third fibrous body 64 composed of photocatalytic fibers 66 as shown in FIG. 11 may be used.
That is, in place of the first fibrous body 44, a large number of second fibrous bodies 60 or a large number of second fibrous bodies 60 are formed on the outer surfaces of the straight pipe portions 28 and 28 constituting the airtight container 34 of the ultraviolet lamp 14. Alternatively, the third fibrous body 64 may be attached in an upright state with respect to the outer surfaces of the straight pipe portions 28 and 28 through the adhesive 46.
In this case, a large number of second fibrous bodies 60 whose surfaces are coated with the photocatalyst 42 or a large number of third fibrous bodies 64 composed of the photocatalytic fibers 66 constitute an airtight container 34 constituting the ultraviolet lamp 14. Since the surface of the straight pipe portions 28, 28 is attached in a standing state substantially perpendicular to the outer surface of the straight pipe portions 28, 28, the surface area of the outer surfaces of the straight pipe portions 28, 28 is a large number of second fibrous bodies attached. 60, or the surface integral of the large number of third fibrous bodies 64 is increased, and as a result, the straight pipe portion 28 is compared with the case where the photocatalyst is arranged in the form of a film on the outer surface of the straight pipe portions 28, 28. 28, the surface area of the photocatalyst disposed on the outer surface can be dramatically increased.
[0024]
Similarly, in place of the first fibrous body 44, a large number of second fibrous bodies 60 or a large number of third fibrous bodies 64 are provided on the surface of the substrate 50 of the photocatalyst carrier 18. The adhesive 46 may be applied in a standing state substantially perpendicular to the surface of the substrate 50.
In this case, a large number of second fibrous bodies 60 whose surfaces are coated with the photocatalyst 42 or a large number of third fibrous bodies 64 composed of the photocatalytic fibers 66 are the surfaces of the substrate 50 of the photocatalyst carrier 18. Therefore, the surface area of the base 50 is the surface area of the many second fibrous bodies 60 or the many third fibrous bodies 64 that are deposited. As a result, the surface area of the photocatalyst to be arranged can be dramatically increased as compared with the case where the photocatalyst is arranged on the surface of the substrate 50 in the form of a film.
[0025]
The second fibrous body 60 shown in FIG. 8 and FIG. 9 is a sintering layer 62 that is sintered in a state where anatase-type titanium oxide penetrates into the fine pores of the silica glass on the surface of the fiber 48 made of silica glass. Further, the surface of the sintering layer 62 is coated with a photocatalyst 42 made of anatase-type titanium oxide.
This second fibrous body 60 is obtained by preparing a metal alkoxide solution of titanium, which is the material of the photocatalyst 42, before sintering the silica, which is a material of the silica glass fiber, in the production of the fiber 48 made of silica glass. After impregnating in, it can be obtained by heating and sintering at a temperature of 400 to 800 ° C.
That is, since the silica before sintering has many fine pores on the surface, when the silica is impregnated in the metal alkoxide solution of titanium, the surface of the silica is covered with the metal alkoxide solution of titanium. Then, the metal alkoxide solution of titanium penetrates into the fine pores of silica. When heated at a temperature of 400 to 800 ° C. in this state, the silica is sintered to form a fiber 48 made of silica glass, and the titanium metal alkoxide solution on the silica surface is hydrolyzed and polymerized to cause anatase type. A photocatalyst 42 made of titanium oxide is formed. In addition, the fine pores on the silica surface are also sintered to form silica glass, and the metal alkoxide solution of titanium that has penetrated into the fine pores of the silica is also hydrolyzed and polymerized to form anatase-type titanium oxide. As a result, the sintering layer 62 sintered with the anatase type titanium oxide permeating into the fine pores of the silica glass is formed.
In the second fibrous body 60, the photocatalyst 42 and the fiber 48 are bonded via the sintering layer 62 sintered in a state where the anatase-type titanium oxide is infiltrated into the fine pores of the silica glass. Therefore, the bond between the photocatalyst 42 and the fiber 48 becomes very strong, the photocatalyst 42 does not easily peel off, and is excellent in durability.
[0026]
The third fibrous body 64 shown in FIGS. 10 and 11 is composed of a photocatalytic fiber 66 made of anatase-type titanium oxide (TiO ₂ ).
This photocatalytic fiber 66 can be formed by the following method, for example. First, a titanium metal alkoxide, water for hydrolysis of the titanium metal alkoxide, a solvent such as methanol, and a regulator of hydrolysis and polymerization reaction of the titanium metal alkoxide are prepared. A photocatalytic material is prepared.
Next, by heating the photocatalytic material in a solution state at a relatively low temperature of, for example, about 200 ° C., the solvent is evaporated and the hydrolysis / polymerization reaction of the metal alkoxide of titanium partially proceeds to obtain a solution. The photocatalytic material in a state is made into a viscous sol.
Next, after stretching the viscous sol-like photocatalyst material, it is heated and baked at a temperature of 400 ° C. to 800 ° C. to completely advance the polymerization reaction of the metal alkoxide of titanium, thereby forming a gel-like elongated photocatalyst fiber. The photocatalyst fiber 66 can be formed by forming and cutting the photocatalyst fiber into a predetermined length.
[0027]
【The invention's effect】
In the air purifying apparatus according to claim 1, a large number of fibrous bodies coated with a photocatalyst are applied in an upright state with respect to a substrate surface within an irradiation range of ultraviolet rays generated by an ultraviolet lamp. Since the photocatalyst carrier configured as described above is disposed, the surface area of the substrate on which the photocatalyst is disposed increases the surface integral of a large number of deposited fibrous bodies, and the photocatalyst is disposed on the surface of the substrate in the form of a film. Compared to the case, the surface area of the photocatalyst disposed inside the housing can be dramatically increased.
[0028]
In the air purification device according to claim 2, since a large number of fibrous bodies coated with the photocatalyst are attached in an upright state to the outer surface of the airtight container constituting the ultraviolet lamp, the photocatalyst is provided. The surface area of the outer surface of the hermetic container to be increased will increase the surface integral of a large number of adhered fibrous bodies.As a result, compared to the case where the photocatalyst is disposed in the form of a film on the outer surface of the hermetic container, The surface area of the photocatalyst disposed inside the housing can be dramatically increased.
[0029]
In the air purification apparatus according to claim 3, a large number of fibrous bodies coated with a photocatalyst are deposited in an upright state on a substrate surface within an irradiation range of ultraviolet rays generated by an ultraviolet lamp. Since the photocatalyst carrier configured as described above is disposed, the surface area of the substrate on which the photocatalyst is disposed increases the surface integral of a large number of attached fibrous bodies, and the photocatalyst is disposed on the substrate surface in a film form. Compared to the case, the surface area of the photocatalyst disposed inside the housing can be dramatically increased.
Moreover, since many fibrous bodies coated with the photocatalyst are also applied to the outer surface of the airtight container of the ultraviolet lamp, the surface area of the photocatalyst disposed within the ultraviolet irradiation range can be further increased. it can.
[0030]
The sintered body according to any one of claims 1 to 3, wherein the fibrous body is formed by sintering on the surface of the fiber made of silica glass in a state where anatase-type titanium oxide is infiltrated into the fine pores of the silica glass. Further, the surface of the sintering layer is coated with a photocatalyst made of anatase type titanium oxide.
In this case, the photocatalyst and the fiber are bonded to each other through a sintering layer sintered in a state where the anatase type titanium oxide is infiltrated into the fine pores of the silica glass. Becomes very strong, the photocatalyst does not easily peel off, and is excellent in durability.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of an air purification device according to the present invention.
FIG. 2 is a front view showing an ultraviolet lamp.
FIG. 3 is a partially enlarged longitudinal sectional view of a straight pipe portion of an airtight container in an ultraviolet lamp.
FIG. 4 is an enlarged cross-sectional view of a straight tube portion of an airtight container in an ultraviolet lamp.
FIG. 5 is an enlarged longitudinal sectional view of a first fibrous body.
FIG. 6 is an enlarged cross-sectional view of a first fibrous body.
FIG. 7 is a partially enlarged cross-sectional view of a photocatalyst carrier.
FIG. 8 is an enlarged longitudinal sectional view of a second fibrous body.
FIG. 9 is an enlarged cross-sectional view of a second fibrous body.
FIG. 10 is an enlarged longitudinal sectional view of a third fibrous body.
FIG. 11 is an enlarged cross-sectional view of a third fibrous body.
FIG. 12 is a schematic explanatory view showing a conventional air purification device.
[Explanation of symbols]
10 Air purifier
12 housing
14 UV lamp
18 Photocatalyst carrier
24 Inlet
26 Exhaust vent
34 Airtight container
40 Phosphor layer
42 Photocatalyst
44 First fibrous body
46 Adhesive
50 substrate
60 Second fibrous body
64 Third fibrous body
66 Photocatalytic fiber

Claims (3)

An ultraviolet lamp is housed in a housing having an intake port and an exhaust port, and within the ultraviolet irradiation range generated by the ultraviolet lamp, the surface of the fiber made of silica glass and the anatase in the silica glass micropores A sintering layer formed in a state in which titanium oxide of a type is infiltrated, and a surface of the sintering layer is coated with a photocatalyst made of anatase type titanium oxide , An air purifying device comprising a photocatalyst carrier that is attached in a standing state to a surface. A UV lamp is housed in a housing having an intake port and an exhaust port, and the outer surface of an airtight container made of an ultraviolet transmitting material constituting the UV lamp is formed on the surface of a fiber made of silica glass. A sintered sintering layer formed by anatase-type titanium oxide permeating into the pores is formed, and the surface of the sintering layer is coated with a photocatalyst made of anatase-type titanium oxide. An air purification apparatus characterized in that the body is attached in a standing state to the outer surface of an airtight container. An ultraviolet lamp is housed in a housing having an intake port and an exhaust port, and within the ultraviolet irradiation range generated by the ultraviolet lamp, the surface of the fiber made of silica glass and the anatase in the silica glass micropores A sintering layer formed in a state in which titanium oxide of a type is infiltrated, and a surface of the sintering layer is coated with a photocatalyst made of anatase type titanium oxide. A photocatalyst carrier that is configured to be deposited in a standing state with respect to the surface is arranged, and on the outer surface of an airtight container made of an ultraviolet transmitting material constituting the ultraviolet lamp, on the surface of a fiber made of silica glass, A sintered sintering layer formed by anatase-type titanium oxide permeating into the fine pores of the silica glass is formed, and an anatase is formed on the surface of the sintering layer. Air purification device photocatalyst made of type titanium oxide is characterized in that a number of fibrous material comprising coated and deposited at upright position relative to the outer surface of the airtight container.

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