JP2000254515A - Housing box with deodorization/sterilization function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To photo-decompose and remove polluted air containing odorous substances and bacteria most efficiently by arranging at least one ultrasonic light source fitted with a cylindrical honeycomb structure in a housing box main body. SOLUTION: In a housing box main body 1, a cylindrical honeycomb structure 2 fitted to contact a rack plate 4 and an ultraviolet light source 3 directly is installed in the lower part. The structure 2 is composed of, for example, a titanium oxide-coated sheet obtained by a process in which fine powder of titanium oxide is dispersed with a dispersant in water, after a colloidal solution of silica or alumina is added and stirred, and an organic polymer binder is added and stirred to prepare an titanium oxide coating dispersion, which is applied on both sides of a support and dried. When polluted air is introduced into the space of the honeycomb structure 2 by circulation by natural convection to contact the wall of the structure 2, numberless swirls are generated, the polluted air containing odorous substances and bacteria penetrate deep into a titanium oxide support sheet layer to be photo-decomposed/removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance storage, a closet, a clog box, a storage box for a system kitchen, etc., which efficiently removes odorous substances and various bacteria by photolysis.

[0002]

2. Description of the Related Art In recent years, with the increase in awareness of environmental hygiene, air conditioners having deodorizing and sterilizing functions for deodorizing and sterilizing indoor odors and odors generated from office equipment such as copiers. Devices, air conditioners, air purifiers and the like have been widely used. In particular, in an aged reinforced concrete building or a building having a problem in the design of health and hygiene, the problem of air pollution in the building has become evident, and an air conditioner having a deodorizing function and a sterilizing function is required.

[0003] In addition, in the room, entrance storage, closet,
Various storage boxes such as a shoe box and a system kitchen are installed. Since many of these storage boxes have a closed structure, odorous substances and various germs are easily propagated inside the box, which is not preferable in terms of hygiene. Therefore, storage boxes having a deodorizing function and a sterilizing function are required. Conventionally, deodorization is generally performed using an odor-adsorbing substance such as activated carbon, and sterilization is performed using ultraviolet light irradiation or ozone. Since odor-adsorbing substances such as activated carbon become saturated in a relatively short period of time, they need to be replaced, and irradiation with ultraviolet rays or use of ozone may be harmful to the human body. And restrictions on use.

[0004] Recently, deodorants that combine a photoreactive semiconductor such as titanium oxide and an adsorbent such as activated carbon have been developed and are being put into practical use. This deodorant has the function of decomposing and disinfecting odorous substances and bacteria adsorbed by adsorbed substances with active oxygen generated by decomposing water vapor and oxygen in the atmosphere when the photoreactive semiconductor is irradiated with ultraviolet rays. And, as well as being able to regenerate the saturated adsorbed material, and exhibit a bactericidal effect, as described above, has a deodorizing function and a bactericidal function,
Suitable for deodorization and sterilization.

[0005] It is known that this deodorant deodorizes at a much higher rate than the photodecomposition rate of the photoreactive semiconductor alone due to the adsorbing action of the adsorbed substance. For this reason, it is not suitable for use in an environment where the deodorization load is continuous under a high load state higher than the photolysis rate, but the load pattern is composed of a combination of a short high deodorization load and a long low deodorization load. It is a suitable deodorant and suitable for use in deodorizing / sterilizing equipment used in places such as homes and offices that have a temporary high deodorizing load during the day and a low deodorizing load during the night. It is a deodorant.

[0006]

Problems to be Solved by the Invention
No. 1 describes a photocatalytic device in which a hollow cylindrical honeycomb structure made of a metal oxide catalyst is provided around an ultraviolet irradiation lamp. However, although this method is applied to an air purifier, there is no detailed description on how to arrange the hollow cylindrical honeycomb structure with respect to the flow direction of the contaminated air. Also, Japanese Patent Application Laid-Open No. 9-206136 describes a method in which a photocatalyst is provided on the outer surface of furniture such as a learning desk, and odor components such as bacteria and tobacco are removed by room light. further,
Japanese Patent Application Laid-Open No. 10-137098 describes a storage device for antifouling tableware in which a tableware coated with a photocatalyst is stored in a tableware storage provided with a light source for exciting the photocatalyst. However, a storage box provided with an ultraviolet light source covered with a cylindrical honeycomb structure made of a photoreactive semiconductor supporting sheet inside the storage box has not yet been proposed.
An object of the present invention is to provide a storage box such as an entrance storage, a closet, a clog box, a system kitchen, etc., which efficiently removes odorous substances and various bacteria by photolysis.

[0007]

Means for Solving the Problems As a result of intensive studies, the present inventor has found that, in order to most efficiently perform photolysis and removal of contaminated air containing odorous substances and various germs in a storage box, first of all, a photoreactive reaction is required. Arranging the semiconductor carrier at a short distance from the ultraviolet light source to increase the ultraviolet light receiving intensity; second, increasing the ultraviolet light receiving area received by the photoreactive semiconductor carrier as much as possible; third, photoreactive semiconductor carrier It has been confirmed in experiments that it is important to efficiently contact the air with the contaminated air.

In order to satisfy all of the above conditions, in the present invention, a photocatalyst structure comprising a photoreactive semiconductor coated sheet in which a liquid material containing a photoreactive semiconductor is applied or impregnated on a support is provided. A photocatalyst structure comprising a photoreactive semiconductor supporting sheet in which a reactive semiconductor or photoreactive semiconductor composite particles are internally added to a support was employed. Then, the outer peripheral surface of the ultraviolet light source is covered with the photocatalyst structure,
The contaminated air was caused to flow along the outer peripheral surface of the photocatalyst structure. Further, a spacer was inserted at a key point between the inner peripheral surface of the photocatalyst structure and the outer peripheral surface of the ultraviolet light source, so that the contaminated air also flowed into the space between the photocatalyst structure and the ultraviolet light source. By using the photocatalyst structure, the ultraviolet light receiving area of the photoreactive semiconductor carrier can be increased, and the contact area between the contaminated air and the photoreactive semiconductor carrier can be increased. Examples of the photocatalyst structure include a honeycomb structure, a corrugated structure, a lattice body, and a filter. A cylindrical honeycomb structure is particularly preferable, and a cylindrical honeycomb structure is most preferable.

The cylindrical shape of the present invention does not necessarily need to be a complete cylinder, but may be any cylindrical shape that can directly contact the entire outer periphery or a part of the outer periphery of the light source.
Sections are circles, ellipses, semicircles, semi-ellipses, curved shapes, triangles, squares,
Other shapes such as a rectangle may be used. Further, a part of the cylinder may be cleaved. Further, as the shape of the ultraviolet light source, any shape such as a straight tube shape, a U-shape, and a curved shape may be used as long as it can be covered with the honeycomb structure, but the cylindrical straight tube type is the best in terms of performance.

The ultraviolet light source equipped with the cylindrical honeycomb structure may be arranged at any position in the storage box. However, considering the air circulation caused by the heat generated from the light source, the ultraviolet light source is arranged at the lower part in the storage box body. Is best. By providing one or more vents in the storage box, heat dissipation from the light source and natural ventilation are also possible. Further, in order to prevent insects or the like from entering the storage box, a mesh-shaped vent can be provided. Furthermore, in the present invention, the air in the storage box is purified by natural circulation.However, the fan is installed at an appropriate position in the storage box, or the ultraviolet light source and the fan equipped with the cylindrical honeycomb structure are used. By using an integrated device, it is possible to forcibly circulate the air in the storage box and increase the purification capacity.

In general, a shelf plate is often provided in the storage box. In order to efficiently circulate air by convection in the storage box, a plurality of ventilation holes are provided in the shelf plate. Alternatively, it is also possible to provide a mesh-shaped vent. A metal light reflecting plate can be provided on the inner surface of the storage box near the ultraviolet light source so that the inner surface of the storage box is not deteriorated by ultraviolet rays emitted from the ultraviolet light source.

Further, in order to prevent the stored items in the storage box from being deteriorated by the ultraviolet rays radiated from the ultraviolet light source, it is possible to cover the ultraviolet light source equipped with the cylindrical honeycomb structure with a metal mesh cover. It is.

FIG. 1 shows an example of a storage box according to the present invention. At least one ultraviolet light source equipped with a cylindrical honeycomb structure is disposed in the storage box body.
The cylindrical honeycomb structure comprises a sheet formed by coating or impregnating a coating liquid containing titanium oxide as a photoreactive semiconductor on a support or a sheet in which titanium oxide is internally added to a support. This is a honeycomb structure obtained. Since the honeycomb structure is desirably mounted at a short distance from the ultraviolet light source, the honeycomb structure may be brought into direct contact with the ultraviolet light source. In order to efficiently contact the titanium oxide supporting sheet of the honeycomb structure with the contaminated air, a spacer is inserted between the ultraviolet light source and the honeycomb structure, and the introduced contaminated air flows along the outer peripheral portion of the honeycomb structure. While flowing, partly enters or passes through the hexagonal honeycomb space surrounded by the titanium oxide supporting sheet and passes through the space between the outer peripheral surface of the ultraviolet light source and the inner peripheral surface of the honeycomb structure. Is also good.

One example of the honeycomb structure used in the present invention is a titanium oxide containing a titanium oxide fine powder, an inorganic binder containing one or both of silica sol and alumina sol, and an organic polymer binder. The titanium oxide-containing layer has a weight ratio of the titanium oxide fine powder to the inorganic binder of 5: 1 to 1: 5, and the organic polymer binder has a weight ratio of 5: 1 to 1: 5. This is a cylindrical honeycomb structure formed of a titanium oxide coat sheet having a content of 3 to 25% by weight based on the total solid content of the titanium oxide-containing layer.

As another example of the honeycomb structure used in the present invention, a titanium oxide composite comprising a titanium oxide fine powder and a silica sol or alumina sol having a mixing ratio of 5: 1 to 1: 5 with respect to the titanium oxide fine powder. It is a cylindrical honeycomb structure formed from a titanium oxide supporting sheet in which titanium oxide composite particles obtained by pulverizing particles with a dry or wet pulverizer to an average particle diameter of 3 to 15 microns are internally added to a support.

[0016]

According to the present invention, by providing an ultraviolet light source having a cylindrical titanium oxide supporting honeycomb structure mounted in a storage box, the titanium oxide supporting honeycomb structure is disposed at a short distance from the ultraviolet light source, and In addition to increasing the light receiving intensity, the UV light was evenly received, the UV receiving area was increased by the cylindrical titanium oxide supporting honeycomb structure, and countless times when contaminated air came into contact with the cylindrical titanium oxide supporting honeycomb structure. By generating a turbulent flow of vortices and efficiently penetrating the contaminated air deep into the titanium oxide layer of the honeycomb structure, the contaminated air containing odorous substances, various germs, and the like was most efficiently photolytically removed.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION As the photoreactive semiconductor in the present invention, metal oxide particles such as zinc oxide, tungsten trioxide, titanium dioxide, cerium oxide and titanium peroxide are preferred, and titanium dioxide is particularly preferred. Hereinafter, an example in which titanium dioxide is used as a photoreactive semiconductor will be described.
As one embodiment of the present invention, the ultraviolet light source is a cylindrical straight tube type ultraviolet light source on which a cylindrical titanium oxide honeycomb structure is easily mounted. Further, as described above, the cylindrical titanium oxide honeycomb structure and the cylindrical straight tube type ultraviolet light source are directly connected to each other so that the cylindrical titanium oxide honeycomb structure wraps around the cylindrical straight tube type ultraviolet light source. The light receiving efficiency is the best when it is mounted in a contact state.

However, as long as the intensity of ultraviolet light received by the honeycomb structure does not significantly decrease, the honeycomb structure is not directly contacted.
It may be mounted so as to surround the ultraviolet light source at a constant interval from the outer peripheral surface thereof. However, in this case, the distance between the inner peripheral surface of the honeycomb structure and the outer peripheral surface of the ultraviolet light source is desirably 1 cm or less. In order to maintain the above-mentioned interval, it is necessary to insert at least one spacer corresponding to the dimension of the interval between the inner peripheral surface of the honeycomb structure and the outer peripheral surface of the ultraviolet light source.

The apparent thickness of the cylindrical titanium oxide honeycomb structure, that is, 1/2 of the difference between the inner diameter and the outer diameter, is determined by the efficiency of receiving ultraviolet light emitted from the ultraviolet light source and the efficiency of contact with odorous substances and various bacteria. In consideration of the above, 0.3 to 3 cm is desirable. Furthermore, when a titanium oxide honeycomb structure is mounted on a columnar ultraviolet light source, by multiple mounting so that the honeycomb structure is concentric when viewed from the side,
It is also possible to greatly enhance the photolytic function. Particularly, it is best to use a double or triple mounting.

When the contaminated air is guided into the space inside the honeycomb structure, when the contaminated air comes into contact with the walls of the honeycomb structure, a turbulent flow composed of countless vortices is generated, and contains odorous substances, various bacteria and the like. The contaminated air efficiently penetrates deep into the titanium oxide supporting sheet layer and is removed by photolysis.

As described above, the contaminated air flows by natural circulation while efficiently contacting the cylindrical titanium oxide honeycomb structure, so that odor substances and various bacteria contained in the contaminated air are decomposed or sterilized. The cylindrical honeycomb structure made of the photoreactive semiconductor coat contains an inorganic binder containing titanium oxide fine powder, one or both of silica sol and alumina sol, and an organic polymer binder. A titanium oxide-containing layer, wherein the mixing ratio of the titanium oxide fine powder and the inorganic binder in the titanium oxide-containing layer is 5: 1.
A flat honeycomb made from a titanium oxide coat sheet having a mixing ratio of the organic polymer binder of 3 to 25% by weight based on the total solid content of the titanium oxide-containing layer. The structure is formed into a cylindrical shape.

The titanium oxide coated sheet constituting the cylindrical titanium oxide honeycomb structure includes natural cellulose fibers,
It is composed of a sheet obtained by coating or impregnating a base material such as a sheet or a plastic sheet made of a woven or non-woven fabric made of synthetic fibers or the like, or a mixture thereof with a titanium oxide-containing composition.

The titanium oxide core constituting the honeycomb structure is
The sheet can be manufactured, for example, by the following method. The titanium oxide fine powder is dispersed in water together with a dispersant, and then a colloidal solution of silica or alumina is added at a fixed ratio and stirred for several hours. Thereafter, an organic polymer binder is added and stirred to prepare a titanium oxide paint dispersion, which is applied to both sides of the support and dried to obtain a target titanium oxide coat sheet.
During the drying process after this coating, first, the composite of titanium oxide fine particles and silica or alumina composed of ultrafine particles having a particle diameter of millimicron order occurs preferentially,
Titanium oxide composite particles are formed. Subsequently, it is considered that binding between the titanium oxide composite particles by the organic polymer binder and immobilization to the support occur. Thus, the titanium oxide fine particles form the titanium oxide composite particles with the silica or alumina fine particles, and the titanium oxide composite particles have a myriad of pores through which gas molecules can pass. Can reach the surface of the titanium oxide fine particles.
Therefore, it is considered that the titanium oxide fine particles do not come into direct contact with the binder and the support, maintain high photocatalytic activity, and do not decompose the binder and the support. Honeycomb processing of the titanium oxide coated sheet thus obtained,
Furthermore, by forming into a cylindrical shape, a cylindrical titanium oxide core
As a result, a honeycomb structure is obtained.

Further, flame retardancy can be imparted by using a flame-retardant paper as a support of the titanium oxide coat sheet. Examples of the flame retardant include guanidine sulfamate, guanidine phosphate, guanidine tetraborate, ammonium sulfamate, ammonium phosphate, melamine phosphate, tetrabromobisphenol A, antimony trioxide, aluminum hydroxide, and magnesium hydroxide. Can be As the impregnation method of the flame retardant, it may be impregnated with a size press in the papermaking process,
Paper may be added in advance at the stage of preparing the stock and paper may be formed.

The cylindrical honeycomb structure made of the photoreactive semiconductor-supporting sheet is made of an oxidized material comprising a titanium oxide fine powder and a silica sol or alumina sol having a mixing ratio of 5: 1 to 1: 5 with respect to the titanium oxide fine powder. A flat honeycomb structure produced from a titanium oxide-carrying sheet in which a titanium oxide composite particle is pulverized by a dry or wet pulverizer to an average particle diameter of 3 to 15 μm into a support is formed into a cylindrical shape. It is molded into.

The titanium oxide-carrying sheet constituting the cylindrical titanium oxide-carrying sheet honeycomb structure is made of a woven or non-woven fabric made of natural cellulose fibers, synthetic fibers or the like, or a sheet or a plastic sheet made of a mixture thereof. This is a sheet in which titanium oxide or titanium oxide composite particles are internally added to a material. The photocatalytic titanium oxide used in the present invention has a specific surface area of 10 to 500 m ² / g.

As the ultraviolet light source, any light source that emits ultraviolet light, such as a black light or a fluorescent light, can be used. However, an ultraviolet lamp in which the wavelength of emitted light mainly includes an ultraviolet region is more preferable, and any of a hot-cathode fluorescent lamp, a hot-cathode germicidal lamp, a cold-cathode fluorescent lamp and a cold-cathode germicidal lamp can be used. However, a cold cathode fluorescent lamp and a cold cathode germicidal lamp are most preferable from the viewpoints of low heat generation, low power consumption, compactness and long life.

[0028]

Embodiment 1 An embodiment of the present invention will be described below with reference to FIG. Inside the storage box body 1 of the present invention, a cylindrical titanium oxide coated sheet honeycomb structure 2 mounted in direct contact with the shelf plate 4 and the ultraviolet light source 3 is installed at a lower portion of the storage box body. And it is designed so that the contaminated air in the storage box flows along the outer peripheral surface of the honeycomb structure by circulation by natural convection.

Next, the manufacture of the honeycomb structure will be described. First, ultrafine titanium oxide fine powder (KEMIRA
FINNTI S-150 X-ray particle size 2 nm) 10
0 parts by weight of polycarboxylic acid soda (Toa Gosei Alon T
-40) 2 parts by weight were mixed with water, and the mixture was stirred at high speed for 1 hour with a lab mixer to disperse the fine titanium oxide powder. Next, silica sol (Snowtex ST-40 manufactured by Nissan Chemical Industries) 16
0 parts by weight was added to this dispersion and stirred at high speed for 1 hour to prepare a titanium oxide / silica sol dispersion having a solid content of 20% by weight. Furthermore, in this titanium oxide / silica sol dispersion,
Polyvinyl alcohol 1 as a water-soluble organic polymer compound
5.3 parts by weight and 30.6 parts by weight of a styrene-butadiene copolymer as a thermoplastic polymer emulsion were added, and the mixture was stirred slowly for 30 minutes without foaming to prepare a titanium oxide coating composition. At this time, the blending ratio of the organic polymer binder to the titanium oxide-containing layer was 15% by weight.

Using a Mayer bar, the above-mentioned coating composition of titanium oxide coating composition was coated on a high-quality paper having a basis weight of 60 g / m ² with a coating weight of 4 g / m ^{2 on the} F side and 4 g / m ^{2 on} the W side after drying. After being coated or impregnated on both sides so as to obtain No. ² , it was dried to prepare a titanium oxide coated sheet. While gluing the 80 sheets of titanium oxide coated sheet A4 size produced by the above method,
Laminated, cut at 7mm width, 12cm long, 20c wide
m, and a planar honeycomb body having a thickness of 0.7 cm was obtained. Furthermore, a cylindrical titanium oxide coated sheet honeycomb structure was obtained by gluing two ends in the lateral direction of the planar honeycomb body.

Next, a test for confirming the photocatalytic effect will be described. The above honeycomb structure having a length of 20 cm is connected to a cold cathode fluorescent lamp (FC5BLB / 200T1 manufactured by Toshiba Lighting & Technology Corp.).
It was directly wound around 2) and mounted. This is shown in FIG.
One was installed in a storage box having a volume of 0 liter. Then, acetaldehyde gas was injected into the storage furniture so that the initial concentration of acetaldehyde in the storage box became 20 ppm, and the fluorescent lamp was turned on. Then, the concentration of acetaldehyde in the storage box was measured over time by a gas chromatograph with FID. As a result, as shown in Table 1, it was confirmed that acetaldehyde was completely photolyzed in 2.5 hours.

Embodiment 2 Next, another embodiment of the present invention will be described with reference to FIG.
Inside the storage box main body 1 of the present invention, a semi-cylindrical titanium oxide supporting sheet honeycomb structure 2 mounted in a state of being in direct contact with the shelf plate 4, the vent 5, the light reflection plate 6 and the ultraviolet light source 3 is stored. It is installed at the bottom of the box body. And it is designed so that the contaminated air in the storage box flows along the outer peripheral surface of the honeycomb structure by circulation by natural convection.

Next, the manufacture of the honeycomb structure will be described. Fine powder of titanium oxide (FINNT manufactured by KEMIRA
100 parts by weight of IS-150 (X-ray particle size 2 nm) and 2 parts by weight of polycarboxylic acid soda (Toa Gosei Aron T-40) are mixed with water, and the mixture is stirred at high speed for 1 hour with a lab mixer to obtain fine titanium oxide powder. Dispersed. Next, 160 parts by weight of silica sol (ST-40 manufactured by Nissan Chemical Industries, Ltd.) was added to this dispersion,
The mixture was stirred at a high speed for one hour to prepare a titanium oxide / silica sol dispersion having a solid content of 20% by weight. Further, this dispersion was added to 10
It was dried in a dryer at 0 ° C. for 1 hour to obtain titanium oxide / silica sol composite particles.

The above-mentioned titanium oxide / silica sol composite particles 1
00 parts by weight and 2 parts by weight of polycarboxylic acid soda (Toa Gosei Alon T-40) were mixed with water, and wet pulverized for 2 hours using a horizontal wet pulverizer to obtain 20 parts by weight having an average particle diameter of 10 microns. % Titanium oxide / silica sol composite particle dispersion was obtained. 500 parts by weight of this dispersion and a dispersion obtained by mixing 9 parts by weight of wood pulp fiber (NBKP) in 4000 parts by weight of water and further adding 1% by weight of anion-modified polyacrylamide, and At 100 g / m ²
A sheet containing the titanium oxide / silica sol composite particles of the above is paper-made and dried at 120 ° C.
I got it.

The sheet carrying the titanium oxide composite particles is A4
80 sheets of the same size were overlaid while being glued, and cut at a width of 7 mm to obtain a planar honeycomb body having a length of 12 cm, a width of 20 cm and a thickness of 0.7 cm. Furthermore, a cylindrical titanium oxide-carrying sheet honeycomb structure was obtained by gluing two ends in the horizontal direction of the planar honeycomb body.

Next, a test for confirming the photocatalytic effect will be described. The above honeycomb structure having a length of 20 cm is connected to a cold cathode fluorescent lamp (FC5BLB / 200T1 manufactured by Toshiba Lighting & Technology Corp.).
It was directly wound around 2) and mounted. This is shown in FIG.
One was installed in a storage box having a volume of 0 liter. Then, acetaldehyde gas was injected into the storage box so that the initial concentration of acetaldehyde in the storage box became 20 ppm, and the fluorescent lamp was turned on. Then, the acetaldehyde concentration in this storage box is
It was measured over time by a gas chromatograph with D. as a result,
As shown in Table 2, it was confirmed that acetaldehyde was completely photolyzed in 2.5 hours.

Table 1 Table 2

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view showing a first embodiment of the present invention;

FIG. 2 is a perspective explanatory view showing a second embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage box main body 2 Honeycomb structure 3 Ultraviolet light source 4 Shelf 5 Vent 6 Light reflection plate

Continued on the front page (72) Inventor, Toshimi Satake 5-2-1-1, Oji, Kita-ku, Tokyo Nippon Paper Industries Central Research Laboratory (72) Inventor, Mamoru Suzuki 5-2-1-1, Oji, Kita-ku, Tokyo Nippon Paper Industries Development Planning Co., Ltd. (72) Inventor Kyosho Nagai 5-2-1-1, Oji, Kita-ku, Tokyo Nippon Paper Industries Co., Ltd. Development Planning Department (72) Inventor Kazuichi Inui 2-2-1-1, Iidacho, Iwakuni-shi, Yamaguchi Prefecture F-term in stock company pal (reference) 4G069 AA03 AA08 AA20 BA01B BA02B BA37 BA48A BC50A CA17 EA06 EA18 4G075 AA70 BA04 CA33 CA54 EE01 EE33 4L055 AG17 AG18 AG19 AG94 AG97 AG98 AH37 AH50 AJ04 BE08 BE10 EA16 GA27

Claims (9)

[Claims] 1. A storage box for decomposing and removing odorous substances and various germs, wherein one or a plurality of ultraviolet light sources are disposed inside the box, and an outer peripheral surface of the ultraviolet light source is formed from a photoreactive semiconductor supporting sheet. A storage box covered with a photocatalyst structure. 2. The storage box according to claim 1, wherein the photocatalyst structure is a cylindrical honeycomb structure. 3. The storage box according to claim 1, wherein the photoreactive semiconductor support sheet is a support sheet formed by applying or impregnating a liquid containing a photoreactive semiconductor. 4. The storage box according to claim 1, wherein the photoreactive semiconductor supporting sheet is a supporting sheet obtained by internally adding a photoreactive semiconductor to a support. 5. The storage box according to claim 2, wherein the ultraviolet light source is a cylindrical straight tube type, and the cylindrical honeycomb structure is a cylindrical honeycomb structure or a semi-cylindrical honeycomb structure. 6. The storage box according to claim 2, wherein the tubular honeycomb structure is covered in a state of being in direct contact with the ultraviolet light source. 7. A sheet coated or impregnated with a liquid agent containing a photoreactive semiconductor, comprising a photoreactive semiconductor, an inorganic binder containing one or both of silica sol and alumina sol, and an organic polymer binder. Wherein the compound ratio of the photoreactive semiconductor to the inorganic binder in the photoreactive semiconductor-containing layer is 5: 1 to 1: 5, and the organic polymer is The storage box according to claim 3, wherein the mixing ratio of the binder is 3 to 25% by weight based on the total solid content of the photoreactive semiconductor-containing layer. 8. A photo-reactive semiconductor composite sheet comprising a photo-reactive semiconductor and a photo-reactive semiconductor composite particle composed of a silica sol or an alumina sol having a mixing ratio of 5: 1 to 1: 5 with respect to the photo-reactive semiconductor, by dry or The storage box according to claim 4, wherein the photoreactive semiconductor composite particles pulverized to an average particle diameter of 3 to 15 microns by a wet pulverizer are internally added to a support. 9. The storage box according to claim 1, wherein the photoreactive semiconductor is titanium dioxide.