JPH10314597A - Product having low temperature curing type highly active oxide photocatalyst film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a product of antibacterial effect, antifouling effect and deodorizing effect for example on the surface of a plastic or a coating material by forming an oxide photocatalyst film on the surface of a part in an air flow path and adding specified ions in the oxide photocatalyst film. SOLUTION: Ions of elements of electronegativity of less than 1.6, the ion radius of 0.2 nm or less and the valency of 2 or less are added in an oxide photocatalyst film in which TiO2 particles as an oxide photocatalyst are dispersed. A driving force fan 6 of a capacitor motor 7 of a filtration type air cleaner main body is rotated to form an flow. Indoor air containing dust, smoke, oil fine particles, microbes, dead bodies of microbes, pollen, malodor and the like is sucked from a panel (suction hole) 2 by the air flow. The sucked air is exhausted out of outlet of grille 14 after being filtered and cleaned by a filter section 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an article provided with an oxide photocatalytic thin film. The present invention relates to an organic polymer material which is a material having low heat resistance, and more particularly to an article in which a thin oxide photocatalyst thin film is formed on the surface of a general-purpose thermoplastic plastic part. Further, the present invention relates to an ultraviolet lamp or an article provided with an oxide photocatalytic thin film on the entire surface or a part of an article suitable for use indoors where strong ultraviolet rays such as outdoor sunlight cannot be obtained.

[0002] For example, air cleaners, ventilation fans, electric fans, vacuum cleaners, clothes dryers, dish dryers, dishwashers, garbage disposal machines, heaters, humidifiers, dehumidifiers, air conditioners, heating cookers, electromagnetic cookers And a device for generating a flow of air by using an electric blower such as a hair dryer, a deodorizer, and a kotatsu.

[0003] Various dirt components and microorganisms floating on the air adhering to the surface of these electric appliances are decomposed by light in a living environment by a photocatalytic function to prevent stains, deodorization, and the like. The present invention relates to a technique for obtaining surface properties such as antibacterial properties, antifungal properties, and improvement of wettability, and articles thereof.

[0004]

_2. Description of the Related Art In recent years, attention has been paid to materials that exhibit antifouling, deodorizing, and antibacterial effects by utilizing the decomposition of organic substances using a TiO ₂ photocatalyst. This uses a redox reaction of a semiconductor photocatalyst as described in New Ceramics (1996) No. 2,55, and a TiO ₂ thin film formed in a ceramic style is provided.

On the other hand, as a film forming method, an oxide thin film is formed on a substrate by a physical method such as sputtering, or by a chemical method such as a coating method such as a sol-gel method. The former can form a film at a low temperature using a vacuum device or the like. The latter can be applied to a substrate by a simple apparatus such as spin coating or spraying, and processed at a temperature of usually several hundred degrees Celsius to obtain a film. It has been reported that an anatase-type crystal is effective for TiO _2, which is a material for antibacterial and deodorant, and crystallization is effective for expressing functions (Pate
nt No. (PTC) WO 94/11092, (PTC) WO 95/15816). In addition, TiO ₂ has been reported to have high performance by adding V, Fe, etc. (W. Choi, A. Termin, MRHoffmann, J. Phys. C.
hem., 98, 13669-13679 (1994)).

The following inventions are known as examples in which an oxide photocatalyst thin film is applied to various devices using the above materials and methods.

An air purifier, that is, an apparatus for removing dust and malodorous substances from indoor air is disclosed in JP-A-8-266841, JP-A-8-266605, and JP-A-8-309148. In this technique, a filter carrying a photocatalyst containing TiO ₂ as a main component is included, and a mechanism for irradiating a short-wavelength light using a means such as an ultraviolet lamp is provided.

An example of application to a fan is disclosed in
No.7-303819, Ti
A technique of firing a thin film of a photocatalyst containing O ₂ as a main component at about 600 ° C. is known.

Also, in a case of application to a fan as disclosed in Japanese Patent Application Laid-Open No. 9-38189, a mechanism for irradiating ultraviolet rays with a light emitting diode is known.

An example of application to a ventilation fan is disclosed in
A configuration in which an ultraviolet lamp as described in JP-A-57305 is used in combination is known.

As an application example of a deodorizing filter installed in a ventilation path of a vacuum cleaner or a garbage disposer, a photocatalyst containing TiO ₂ as a main component as disclosed in JP-A-7-108175 is known. There has been proposed a technique in which a powder is formed, wrapped in a plastic fiber sheet and heat-sealed.

[0012]

However, there is an insufficient point for forming an oxide thin film on a substrate having low heat resistance, for example, a plastic part by using the conventional technology. The film formed by the sol-gel method includes an antibacterial tile as an antibacterial and deodorant material described in the above literature. However, a heat treatment of several hundred degrees centigrade and at least 300 degrees centigrade or more is required to crystallize titanium oxide. . Therefore, it is difficult to form a film on a substrate having low heat resistance, such as plastics, particularly general-purpose thermoplastic plastics.

In an environment with low light intensity, such as indoors, the decomposition rate of TiO ₂ itself, such as decomposition of organic substances, increases.
However, there is a problem that the light source is not sufficient, and in particular, another light source is required.

The devices to which the present invention is applied are mainly home appliances used in indoor spaces such as ordinary homes and offices, and these products are mainly organic polymer materials ( Plastic). With the exception of televisions and personal computer monitors, which are often used for glass parts, plastics account for about 40-50% by weight of general household appliances, and most of the rest consist of metals. . By volume ratio,
Nearly 90% is plastic. Plastics are widely used because they are easy to lighten, have a good design, and are inexpensive. Among them, thermoplastic plastics are particularly popular because of their high productivity in molding work. It is used.

The most widely used general-purpose plastics as structural members include polypropylene (PP), acrylic butadiene styrene copolymer (ABS), styrene acrylic copolymer (AS), polystyrene (PS),
Nylon (PA), polycarbonate (PC), vinyl chloride (PVC), methacryl (PMMA), polyethylene (PE), polyacetal (POM), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and the like. Material is also 300 ℃
Can not withstand deformation in an environment exceeding

For example, ASTM, D-648 (18.6)
kg / cm ² ) is around 250 ° C. As special high heat-resistant resins, there are polyphenylene sulfide, polyphenylene oxide, and polyetherimide into which glass fibers and the like are kneaded, but they are very expensive and cannot be used in large quantities in the above-mentioned applications.

In general, the higher the heat resistance of a material, the higher the price. Particularly, PE and P are often used for exterior parts.
S, ABS, PP, PVC, which on average account for more than 75% of plastic parts. Among them, even the ABS having the highest heat resistance has an ASTM heat distortion temperature of 120 ° C. or lower. At 300 ° C., it completely dissolves and becomes a liquid, and oxidative decomposition proceeds.

Further, even when the surface is coated with a paint on an inorganic material such as a metal, materials having heat resistance exceeding 300 ° C. are limited. Usually, a thermosetting resin is used for the paint. For example, polyester,
Acrylic, melamine, epoxy, urethane and the like are typical examples, and baking at a temperature of about 150 ° C. is common. When these paints are exposed to an environment exceeding 300 ° C., problems such as loss of gloss and peeling often occur.

As shown by these data, there is a major problem with respect to heat resistance when a general-purpose material is formed by a sol-gel method with a conventional technique.

On the other hand, a physical method such as sputtering, CVD, or vacuum deposition, which is a method of forming a film within a temperature range not exceeding 300 ° C., requires a large-scale apparatus such as a vacuum apparatus, and requires a high production cost. Is high. Further, since the film is formed under a high vacuum at the time of film formation, the composition ratio deviation of the oxide photocatalyst is large and the photocatalytic performance deteriorates. Furthermore, when an organic material is used as a substrate during film formation, there is a problem that the substrate is reversely sputtered and damages the substrate to cause deformation of the substrate. In addition, in a chemical method using a coating method such as a sol-gel method, when a silica sol in which oxide fine particles are dispersed is used, film formation on a substrate having no heat resistance is performed.
Since the heat treatment temperature is low, sufficient sintering cannot be performed, and the strength and water resistance of the formed oxide film become insufficient.

For the above-mentioned reasons, in the conventional technique, the surface of the organic polymer material used for general electric appliances is not damaged without deformation, deterioration or the like.
It was practically difficult to form a photocatalytic thin film containing O ₂ as a main component.

A first object of the present invention is to provide an article having an antibacterial, antifouling and deodorizing effect in which a highly active photocatalyst is formed on the surface of a material having poor heat resistance, for example, plastic or paint. It is in.

On the other hand, there is no mention in the invention of the above-mentioned photocatalyst application technology of the invention for improving the organic substance decomposition effect of the photocatalyst containing TiO ₂ as a main component. That is, Ti
There is no contrivance in material composition for improving the photoactivity of the film containing O ₂ . Therefore, for example, in the case of JP-A-8-309148 and JP-A-8-266605, which are conventionally known usages for the purpose of deodorization, or in the case of disassembling dirt such as cigarette dust. Japanese Patent Application Laid-Open No. Hei 9-38189, and Japanese Patent Application Laid-Open No. Hei 5-157305, which is an application example for decomposing dirt such as oil during cooking.
In all cases, the activity of the photocatalyst itself is not sufficient, so that a decomposition reaction is enhanced by providing a mechanism for irradiating ultraviolet rays and a heating means.

These are TiO ₂ when the light intensity is low.
The main cause is that the decomposition rate of the organic substance itself is not sufficient, and no means has been devised to increase the decomposition rate. Therefore, as a means for increasing the light intensity, an ultraviolet lamp or the like is used in combination. As the ultraviolet lamp, a high-pressure mercury lamp, a metal halide lamp, or the like is usually used, but a power supply device and a mechanism such as a cooling mechanism are required, which leads to an increase in the weight and price of the entire applied product. In addition, there is a problem in practicality such as the lamp has a life of about 2000 hours and requires periodic replacement.

In the prior art, a technique for increasing the decomposition efficiency by adding Fe and V to TiO ₂ is known. It is difficult to apply to scarce substrate materials.

A second object of the present invention is to provide a photocatalytic film which can be formed at a low temperature, which is the first object, to improve the photolysis efficiency of TiO ₂
It is an object of the present invention to improve the efficiency of decomposition of a single substance, and to make it possible to decompose the attached matter with an intensity lower than the conventionally required light intensity.

In the prior art, in applications such as antibacterial properties, deodorization, and deodorization, the target substance is an organic substance, and the target substance is fine particles or molecules. Although organic matter was able to be decomposed, it took a long time to decompose large-sized fibers and dust, even for organic matter, or it was extremely difficult to decompose inorganic substances, especially dust. Yes, it was imperfect in pollution control applications. Since these stains are generally floating in the air in an electrically charged state, if they adhere to the surface of a highly electrically insulating solid, the static electricity is not easily discharged and the stains remain attached. I will. There is also a problem that the light is blocked by the attached inorganic dirt, the photocatalytic surface is not irradiated with sufficient light, and the decomposition efficiency of organic substances is reduced.

A third object of the present invention is to remove large-sized dust and inorganic dirt, which are difficult to decompose and remove in principle by the oxidative decomposition effect of these photocatalysts, due to electrostatic force. It is to avoid.

[0029]

In order to achieve the above object, the present invention is characterized by an air purifier, a ventilation fan,
Among the parts of electrical products mainly used indoors, which have a mechanism to generate an air flow by driving an electric blower such as a fan, a vacuum cleaner, a clothes dryer, a dish dryer, a dishwasher, a garbage disposer, etc. Another object of the present invention is to provide a low-temperature curing type highly active oxide photocatalyst thin film on the surface of an air flow path, a filtering mechanism in the air flow path, or exterior parts exposed to indoor illumination light.

The material of the target component has a melting point or decomposition temperature of 300 ° C. or less. Particularly, a molding member made of general-purpose thermoplastic resin, a fiber member, a foam member, and a sheet member are cured at a low temperature. By providing the high activity oxide photocatalytic thin film, problems such as contamination, propagation of microorganisms, and generation of offensive odor, which are conventional problems, can be solved.

In the present invention, optimization of the thickness of a thin film of an oxide photocatalyst mainly composed of TiO ₂ , optimization of the particle diameter of TiO ₂ , addition of appropriate ions having low electronegativity, and use of SiO ₂ as a binder In the above-mentioned electric product, a thin film in which the activity of the photocatalyst is improved by optimizing the mixing ratio with TiO ₂ , adding an oxide semiconductor having a high electric affinity, and adding an appropriate noble metal is used. By forming them on the air flow path and the surface of the exterior parts, it is possible to obtain the effects of preventing stains, deodorizing, and suppressing the growth of microorganisms at the level of indoor light, which were not possible conventionally. In addition, by stacking the films, it is possible to prevent damage to an organic base which is weak against oxidative decomposition.

At the same time, in the present invention, during the step of forming a thin film of an inorganic polymer mainly composed of SiO ₂ or TiO ₂ ,
The process of irradiating electromagnetic waves containing a specific wavelength necessary to break the bond between the metal atom and the organic group of the organometallic compound and promoting the hydrolysis reaction enables the polymerization of the inorganic polymer at a low temperature. Because now,
A strong oxide photocatalytic thin film can be obtained at a low temperature that does not cause deformation, melting, or decomposition on the surface of a general-purpose thermoplastic plastic having low heat resistance as described above.

Hereinafter, the details of the low-temperature curing type highly active oxide photocatalytic thin film will be described. In an oxide photocatalyst thin film in which TiO ₂ fine particles as an oxide photocatalyst are dispersed,
Electronegativity is less than 1.6 and ionic radius is 0.2n
The reaction efficiency is improved by adding an element having a valence of 2 or less, which is an element smaller than m 2. Specific elements to be added include Na, Li, K, S
r, Mg, Ca and Zn are particularly effective, and the addition amount of these elements is preferably 0.5 to 20 wt%. Ti
It is most effective to adjust the size of the O ₂ fine particles to 5 to 20 nm.

In an oxide photocatalytic thin film in which TiO ₂ fine particles are dispersed in SiO ₂ , TiO ₂ / SiO
Preferably, the weight ratio of ₂ is 9-5.

The oxide thin film has a thickness of 100 to 500 n.
m is desirable.

The effect is further enhanced when, in addition to the above-described ions, oxide fine particles mainly composed of an oxide semiconductor composed of a metal element having an electron affinity of at least 1.2 are dispersed in addition to the above-mentioned ions. . In particular, when the elements are Sn, Fe,
Those made of Cr are preferred. The addition amount is 2 to 50
wt% is preferred. Among them, oxide fine particles mainly composed of ATO (antimony-added tin oxide) are particularly effective.
When these semiconductive fine particles are added, the surface resistance value of the film itself decreases, so that the dirt itself, including inorganic dirt that cannot be oxidized and decomposed, is less likely to adhere to static electricity.

Further, it is effective to form the oxide photocatalyst thin film into a plurality of laminated structures. The first layer, counted from the surface, has TiO ₂ fine particles dispersed in SiO ₂ , and the aforementioned ions are contained in the film. The oxide fine particles mainly composed of the oxide semiconductor are dispersed in the second layer counted from the surface. This allows the photocatalyst to function effectively without damaging the surface of a plastic or the like having low durability against oxidation. In the second layer, Fe, A
It is more effective if at least one of l and Zr is added.

[0038] In addition to the above-mentioned ions,
It is effective to add at least one of Pt, Rh, Pd, Ag, Cu, and Ni.

TiO ₂ has a function as a photocatalyst, and has effects such as antibacterial, deodorant, and antifouling due to decomposition of organic substances. Its function is caused by electrons and holes generated when TiO _{2 as a} semiconductor is irradiated with light, particularly ultraviolet light. When TiO _2, which is a semiconductor, is irradiated with light having energy equal to or greater than the band gap, electrons and holes are generated. The generated electrons and holes decompose water adsorbed on the TiO ₂ surface to generate H radicals and OH radicals. By reacting the OH radical with an organic substance, the organic substance can be decomposed. Although the photocatalyst decomposes organic substances and the like by such a mechanism, there are the following two means to further increase the reaction rate. The first is to increase the workload of one active point, and the second is to increase the number of active points. Increasing the number of active sites can be achieved by increasing the surface area, that is, by making TiO ₂ finer. Also,
In order to increase the work of the active site, it is necessary to improve crystallization of TiO ₂ (anatase) and to prevent recombination of electrons and holes. By satisfying the above, the reaction rate can be increased. However, improving the crystallization of TiO ₂ (anatase) and increasing the surface area are contradictory, and it is difficult to achieve both. That is, improving the crystallinity leads to an increase in the particle diameter and a decrease in the surface area. Therefore, there is an optimum range between the direction in which the crystallinity is improved and the direction in which the surface area is increased. The optimum range is 5 to 5 based on many experimental results of the present invention.
It was found to be 20 nm. Even when the type of the oxide used as the inorganic binder was changed when the TiO ₂ fine particles were dispersed, the decomposition rate was increased within the range of the particle diameter.

The improvement of the reaction rate by preventing the recombination of electrons and holes can be achieved by increasing the efficiency of separating electrons and holes. Ti on the TiO ₂ surface
There are defects. This defect becomes a recombination point of electrons and holes, and inhibits the reaction. Here, when ions having an ionic radius similar to that of Ti are added, they penetrate into Ti defects on the surface,
Defects disappear and recombination points decrease. Furthermore, since it exists as a positive ion, the electron can be attracted and separated from the hole, and the oxidation reaction of the organic substance can be promoted. According to the present invention, the condition of the additive having such an effect is that the electronegativity is 1.6.
It has been found that those having a smaller ionic radius than 0.2 nm are effective.

Furthermore, it has been found that the present invention can be improved in performance by adding other oxide semiconductor fine particles. This is achieved by injecting carriers from TiO ₂ having a low carrier concentration from an oxide semiconductor having a high carrier concentration. Therefore, it is necessary to make it easy for carriers to flow from the oxide semiconductor to TiO ₂ . When the electron affinity of the oxide semiconductor is less than or equal to Ti, a Schottky barrier is formed. Therefore, the material to be added has an electron affinity of 1.2 e.
v or more.

In the present invention, it was also found that the addition of Fe, Al, and Zr results in loss of the TiO ₂ photocatalyst. When a substrate material mainly composed of an organic substance is used, there is a problem that the substrate is self-destructed by photocatalysis. Therefore, in the present invention, a barrier layer is formed between the substrate and the photocatalyst. By adding Fe, Al, and Zr to the barrier layer, self-destruction can be completely suppressed. Further, since the barrier layer has a high performance, the thickness can be sufficiently reduced. When conductive fine particles such as ATO are added and when they are laminated, the performance of the photocatalyst is improved, and the antistatic function is provided, so that not only decomposition of organic substances but also dust floating in the air, etc. Can prevent the adhesion of inorganic substances, and provide a higher performance antifouling function. Further, in the present invention, the activity is high as described above, and it can be decomposed with weaker light illuminance than before, or it has an antistatic function, so that the fine particles themselves that become dirty are hardly attached by static electricity. The thin film of the highly active photocatalyst can be formed on a material surface which is inexpensive and has high versatility, but has insufficient heat resistance by the conventional film forming method.

For this purpose, titanium or silicon is used.
When a solution containing a low molecular weight organic metal compound and water is converted into an inorganic polymer and polymerized, an electromagnetic wave having a specific wavelength required to break the bond between the metal atom and the organic group of the organic metal compound is generated. By irradiating, the hydrolysis reaction of the organometallic compound is promoted, a prepolymer of metal oxide is formed in the solution, and the film formation temperature can be lowered. The electromagnetic wave having the specific wavelength is most preferably ultraviolet light. After a solution containing a low molecular weight organometallic compound and water is applied to the surface of the adherend, the specific wavelength required to break the bond between the metal atom and the organic group of the organometallic compound such as ultraviolet light is adjusted. It is most preferable to irradiate the coating with an electromagnetic wave and to heat and dry it at the same time, or to heat and dry the coating film after the electromagnetic wave irradiation step.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

Tables 1 to 9 collectively show the composition of the thin film of the low-temperature curing type highly active oxide photocatalyst formed on the surface of various molded articles, coated steel sheets, filters and the like and the effects of the examples. (Embodiment 1) The first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3.
An example of an air purifier will be described.

FIG. 1 is a configuration diagram of a main body of a filtration type air cleaner, and FIG. 2 is a perspective view of the main body. The air purifier body 1 is
The capacitor motor 7 is fixed to the rear cover 12 with screws 8, the motor driving capacitor 11 and the operation switch 9 are fixed, the fan 6 is fixed to the capacitor motor 7 with nuts 5, and the rear cover 12 and the frame 4 are fixed with screws 13. It is fixed. The filter 3 is composed of a panel (inlet) 2
And remove the panel (suction port) 2 to remove the filter 3
Take out. The switch knob 10 is fixed to the operation switch 9.

The fan 6 is rotated by the driving force of the condenser motor 7 to generate an air flow. With this air flow, dirty air in the room, including dust, smoke, oil fine particles, microorganisms and dead bodies of microorganisms, pollens, foul odors, etc., is sucked from the panel (intake port) 2. The inhaled dirty air is filtered by the filter 3 and cleaned.
It is discharged from the exhaust port 15 of the grill 14. The filter 3 has a composite structure in order to have a function for removing various stains and odors. The filter 3 includes an outer filter 3a which is a layer covering an outer surface, and an inner filter 3b inside the outer filter 3a (not shown). The basic structure of each filter is a nonwoven fabric layer such as polyester, urethane, cellulose, nylon or electretized polyolefin or a sponge-like porous layer for filtering dust. In addition to these basic structures, activated carbon particles and fibers for adsorbing odor are mixed, blended, or enclosed in the inner filter 3b. Further, there is a case where an agent for neutralizing the odor permeates the fiber itself or spreads on the surface. As the drug, in addition to various organic acids and alkaloids of flavonoids, antibacterial agents for suppressing the growth of microorganisms are also used. In recent years, highly safe chitin, chitosans and catechin derivatives have been used. The generated air volume is about 2-3 (m ³ / min),
It has the ability to remove 70-95% of tobacco smoke in a 30-minute operation in an 8-tatami room.

In this embodiment, the outer filter 3a is made of a non-woven fabric of acrylic fiber, and the surface of the outer filter 3a
The thin film of the low-temperature curable high-active oxide photocatalyst of Sample No. 21 shown in FIG. After the corona discharge treatment, the acrylic nonwoven fabric filter is formed with a thin film of only SiO ₂ , that is, the sample No. 12 in Table 1 is formed as an underlayer. After this film is formed, the low-temperature curing type high activity of the sample No. 21 is obtained. A thin film of oxide photocatalyst is formed. The method for forming the film will be described in detail in Example 9 described later.
A predetermined sol was prepared, applied to a work by various methods, and then cured in a 120 ° C. atmosphere while irradiating with a low-pressure mercury lamp. Hereinafter, films were formed by the same means in the cases of the various examples. The application method was spraying, dipping, brushing, or the like according to the shape of the work.

The outer filter 3a is a component for first filtering the dirty air taken in from the panel (suction port) 2.
A large amount of foreign substances such as dust, smoke, oil fine particles, microorganisms and dead bodies of microorganisms, pollens, and foul odors adhere thereto. The panel (suction port) 2 is provided with a large number of openings for efficiently sucking air, and light such as indoor lighting and sunlight is supplied from the opening to the air suction surface of the outer filter 3a. Irradiated. The foreign matter collected on the surface of the outer filter 3a is oxidized and decomposed by this light. In particular, cigarette smoke and oil particulates are efficiently decomposed because they adhere to the low-temperature curing type highly active oxide photocatalyst on the filter surface in the form of a thin film. In addition, various microorganisms such as bacteria and fungi floating in the air are killed or their reproduction is suppressed by the decomposition action of the highly active photocatalyst. In addition, by covering the fiber surface of the nonwoven fabric filter with a glassy film, the wettability with smoke particles is improved, and the smoke collection effect is also improved.

The panel (suction port) 2, frame 4, operation switch 9, and rear cover 12, which are exterior parts of the air purifier main body 1, are made of a thermoplastic plastic AB.
S is an injection molded product. A low-temperature-curable high-active oxide photocatalytic thin film is formed on the outer surfaces of these components.

In the present embodiment, a sample shown in Table 6 to be described later is shown on the surface of these target ABS parts, and a schematic view of a thin film on the surface of the acrylic nonwoven fabric filter is shown in a sectional view in FIG. Plastic adherend 189, here an acrylic fiber, low-temperature curing type high active oxide photocatalyst film is composed of the surface first layer 194 and the surface second layer 192, both TiO in the SiO ₂ film 186 _{(2) The} fine particles 187 and lithium 190 are dispersed, and the surface second layer 192
Antimony-added tin oxide fine particles 193 are dispersed therein.

A thin film of a No. 86 low-temperature curing type highly active oxide photocatalyst is formed. In the acrylic nonwoven fabric filter, a first layer is formed after corona discharge treatment, and after forming this film, a second layer of a low-temperature curing type highly active oxide photocatalyst containing ATO of sample No. 86 is formed. .

These exterior parts are irradiated with light such as indoor lighting or sunlight. Therefore, even if various foreign substances as described above adhere, they are oxidatively decomposed as in the case of the filter.

FIG. 3 is a sectional view of an electrostatic precipitating air cleaner. The whole is composed of a front cover 16 and a rear cover 17. Front cover 16, Panel 18
, An intake port 19 and an exhaust port 20 are provided.
A removable pre-filter 21 is provided in a ventilation path connecting the intake port 19 and the exhaust port 20. Behind, the dust collecting electrode 22
And a discharge electrode 23 are provided so as to face each other. Further, there are a dust collection electrode 22 and an ozone removal filter 24 for removing ozone generated from the discharge electrode 23. The pre-filter 21, the dust collection electrode 22, and the discharge electrode 23 are provided. There is a dust collection unit in which an ozone removal filter 24 is mounted on a frame 25.
Further behind, a cushioning material 2 is provided at a contact portion with the dust collection unit.
6, duct 28 connecting blower 27 and dust collection unit,
And a blower 27, the cushioning material 26 is attached to a duct 28, and the duct 28 is further attached to the blower 27, and there is a blower unit formed of the same body. The purified air is exhausted from the exhaust port 20.

The pre-filter 21 plays the same role as the outer filter 3a in the case of a filtration type air purifier.

In this embodiment, the pre-filter 21 is a nylon net, on which a thin film of a low-temperature curing type highly active oxide photocatalyst of Sample No. 21 shown in Table 3 described later is formed. . After the nylon net is subjected to the ultraviolet irradiation treatment, a thin film of a low-temperature curing type highly active oxide photocatalyst of Sample No. 21 is formed. FIG. 18 is a schematic sectional view of the thin film on the surface of the nylon net. Here, the plastic adherend 189 is a nylon fiber, and the low-temperature curing type highly active oxide photocatalytic thin film 191 is made of Si.
TiO ₂ fine particles 187 and lithium 19 are contained in the O ₂ film 186.
0 is dispersed.

The rear cover 17 is an ABS injection-molded product, the front cover 16 is formed by plastically processing a galvanized steel sheet, and the outer surface is coated with a polyester-based baked paint. On the outer surfaces of the rear cover 17 and the front cover 16, a low-temperature curable high-active oxide photocatalytic thin film of Sample No. 86 is formed in the same manner as described above. (Embodiment 2) A ventilation fan according to a second embodiment of the present invention will be described with reference to FIG.

FIG. 4 is a sectional view of the structure of the kitchen ventilation fan as viewed from the side. An electric motor 30 is attached to the box-shaped frame 29, and a blade 31 is attached to the electric motor 30. A shutter 32 is mounted on the outdoor side (exhaust side) of the frame 29, and an orifice 33 is mounted on the indoor side (intake side) of the frame 29. A lighting device 35 with a fluorescent tube 34 is attached to the upper part of the indoor side (intake side) of the orifice 33. A filter 36 is mounted on the indoor side (intake side) of the orifice 33 and the lighting fixture 35. An oil pocket 37 is located below the filter 36.
There is.

The ventilation capacity is generally about 800 to 1000 (m ³ / hour) when the diameter of the blade 31 is 25 (cm).

Although the structure shown in FIG. 4 represents a ventilation fan for kitchen use, the basic structure is the same for general indoor use, toilet use, bathroom use, etc., except that the mounting angle and the positional relationship of parts are slightly different. is there.

As in the case of the above-described air purifier, the structure of the filter 36 can be a composite structure according to various uses to provide a deodorizing function and an antibacterial function.

In the present embodiment, the filter 36 is a single-layer filter made of a non-woven fabric of acrylic fiber, and a thin film of a low-temperature curing type highly active oxide photocatalyst of Sample No. 22 shown in Table 3 is formed on the surface thereof. ing. The acrylic non-woven fabric filter is treated with SiO ₂ after corona discharge treatment.
Only a thin film, that is, sample No. 12 shown in Table 1 was formed as an underlayer.
A thin film of a low-temperature-curable highly active oxide photocatalyst of o.22 is formed.

The frame 29 is an injection molded product of PS (high impact styrene resin),
The blade 31 is an ABS injection molded product. On the surface of these molded parts, a low-temperature curing type highly active oxide photocatalytic thin film of Sample No. 86 is formed in the same manner as in the above-described air cleaner.

A shutter 32 which is a component facing the outdoors
Is made of a hot-dip galvanized cold-rolled steel sheet, the surface of which is coated with an acrylic resin by electrodeposition, and the low-temperature-curable high-active-oxide photocatalytic thin film of Sample No. 86 is similarly coated on the surface. Is formed.

The surface of the filter 36 facing indoors is irradiated with light from indoor lighting, and the opposite surface is irradiated with light emitted from the lighting equipment 35. Frame 29, orifice 3
Light emitted from the lighting device 35 is also applied to components such as the blade 3 and the oil pocket 37. The surface of the shutter 8 facing outdoors is irradiated with sunlight.

In the case of this embodiment, since this is a ventilation fan used in a kitchen, the degree of dirt is very large as compared with a normal ventilation fan. That is, a large amount of edible oil fine particles scattered during cooking adhere to the surface in a large amount. For a kitchen ventilation fan,
Conventionally, a lighting fixture 35 is generally provided. This is a function provided to illuminate the hands at the time of cooking,
The lighting can be turned on in synchronization with the operation of the ventilation fan, or only the lighting function can be turned on independently. Since the decomposition efficiency of organic matter of the photocatalyst according to the present invention is higher than that of the conventional one, sufficient decomposition action can be obtained at the level of indoor lighting without a special lighting fixture in the case of a small dirt load. In a place where the dirt load is large, such as in the case of, for example, it may not be sufficient. However, a sufficient effect can be obtained even in a place with a large dirt load, such as a kitchen or a toilet, if a lighting function using a normal fluorescent lamp or an incandescent light bulb is additionally provided as in this embodiment.

(Embodiment 3) Referring to FIG. 5, a description will be given of a fan, which is a third embodiment of the present invention.

FIG. 5 is a perspective view showing the structure of the electric fan. A column 39 is mounted on the fan body base 38, and a slide pipe 40 is slidably inserted on the column 39. The slide pipe 40 supports a head 44 including a blade 41, a guard 42, an electric motor 43, and the like. The support pillar 39 is formed so as to increase its diameter downward in consideration of strength. The blades 41 are rotated by the driving force of the electric motor 43 to create an air flow forward from the back of the main body. The guard 42 plays a role to prevent a finger or the like from contacting the rotating blade 41. However, in order to prevent an accident such as a child or the like, the guard 4 is further enhanced in safety.
2 may be entirely covered with a net 45 (not shown). A remote control holder 46 is attached to the lower portion of the support 39, and the remote control 47 is usually stored in the remote control holder 46. When an operation mode is set by a switch operation of the remote controller 47, an infrared signal is transmitted from the infrared light emitting unit 48 of the remote controller 47, and a signal is received by the infrared light receiving unit 49 on the upper surface of the main body base unit 38 to perform a setting operation.

In this embodiment, the blade 41 is an injection molded product of AS resin. On the surface of the blade 41, a low-temperature curing type highly active oxide photocatalytic thin film of Sample No. 86 is formed in the same manner as in the case of the molded article such as the ABS.

The guard 42 is made of a steel wire coated with a polyester baking finish, and the surface of the guard 42 is also the same as that of the sample N.
An o.86 low-temperature curing type highly active oxide photocatalytic thin film was formed. The net 45 is made of nylon fiber, on which a low-temperature-curable high-active oxide photocatalytic thin film of Sample No. 86 is formed.

The infrared light emitting section 48 of the remote controller 47,
In addition, the infrared light receiving portion 49 on the upper surface of the main body base portion 38 is made of an AS resin which is a transparent member.

A thin film of a low-temperature curing type highly active oxide photocatalyst of Sample No. 86 was formed on the surface and the surface of these transparent parts. After forming a titanate-based coupling agent film on the surface of the target component, the first layer is formed. After forming this film, the AT No. 86 of Sample No. 86 was formed.
A second layer of a low-curing, high-activity oxide photocatalyst containing O is formed.

The surfaces of the blades 41 and the guards 42 and the like are completely the same as the blades and frames of the air purifier and the ventilation fan described above, and foreign substances floating in the air adhere to the surfaces and become dirty. Since the low-temperature curing type highly active oxide photocatalyst film is formed, the adhered dirt is oxidized and decomposed at the illuminance level of the indoor illumination light, so that there is an effect that the dirt is hardly stained.

In this embodiment, a mechanism for performing remote control using infrared rays is used. The surface of the transparent component used for the light emitting portion and the light receiving portion of the infrared signal is formed on the surface of a low-temperature curing type high active oxidation. Since the photocatalytic thin film is formed, communication of signals is not hindered by dirt adhering to the surface of the component.

In this embodiment, an example of a fan using propeller type blades is used. However, a fan using sirocco type blades can obtain the same effect with completely the same configuration.

(Embodiment 4) A vacuum cleaner according to a fourth embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is an external perspective view of the cleaner, and FIG. 7 is a sectional view of the cleaner body. The cleaner main body 50 includes a lower cover 51 for covering a lower portion of a synthetic resin molded product, an upper cover 52 for covering the upper portion, a lid cover 53, a grill cover 54, a handle portion 55, and the like. And a small-diameter universal wheel 57 is disposed in the center of the bottom surface of the lower front part. A main body switch section 58 is provided at the center of the upper cover 52, and the main body switch section 58 includes a central infrared light receiving section 59, a power switch 60 and a code reel button 61. A suction hose assembly 66 including a suction hose portion 63, an extension tube portion 64, and a suction portion 65 is connected to the dust collection chamber 62. A handle portion 67 is connected to an upper portion of the extension tube portion 64, and a hand operation portion 68 is attached to the handle portion 67. The hand operating section 68 is provided with an infrared signal transmitting section 69, and the infrared signal transmitted from the infrared signal transmitting section 69 is transmitted to the infrared receiving section 59 of the cleaner main body 50, so that the wireless signal is transmitted wirelessly. Operated. Vacuum cleaner body 5
Reference numeral 0 denotes a dust collection chamber 62 provided in the front inside, an electric blower unit 70 and a code reel unit 71 provided side by side in the inside, and a control board 72 provided above the electric blower unit 70 and the code reel unit 71. I have.

Further, a first exhaust ventilation passage 73 extending from the lower end to the upper end of the rear surface of the cleaner main body 50 and extending in the vertical direction is formed behind the electric blower unit 70. Is further connected to a second exhaust ventilation passage 74 formed below the electric blower unit 70. The first exhaust air passage 73 and the second exhaust air passage 74 constitute an exhaust air passage 75 (not shown), and the second exhaust air passage 74 is communicated with the electric blower unit 70 so that the first exhaust air passage The ventilation passage 73 communicates with the exhaust ventilation unit 76. At the upper part of the dust collecting chamber 62, paper filter attaching parts 77, 78 are provided, and the thick paper of the paper filter 79 is attached to the paper filter attaching parts 77, 78, and the lid cover 5 constituting the upper part of the dust collecting chamber 62 is provided.
3 is closed, the installation port 80 and the paper filter 79
Is set at a predetermined position. The universal wheel 57 is attached to a recess formed in the front bottom of the lower cover 51 so as to be rotatable in the horizontal direction. Dust, dust, mites, and microorganisms sucked in from the attachment port 80 together with the airflow are collected by the paper filter 79.

The air flow from which these solids have been removed is applied to the partition plate 81 between the dust collecting chamber 62 and the electric blower 70.
, A communication port 83 provided with an auxiliary filter 82
Through the air blower unit 70 to cool the electric blower unit 70, and further, the cooled air flow is passed through a second exhaust air passage 74 and a first exhaust air passage 73 to an exhaust filter 84. The air is exhausted from the exhaust ventilation unit 76 having

In this embodiment, the upper cover 52, the lid cover 53, the grill cover 54, and the handle 5 of the cleaner main body are provided.
5, the extension tube portion 64, the suction portion 65, and the handle portion 67 of the suction hose assembly 66 are injection-molded products made of ABS resin. A thin film of the photocatalyst is formed. After forming a film of a titanate-based coupling agent on the surface of the target component, a first layer is formed, and after forming this film, a low-temperature-curable high-active oxide containing ATO of Sample No. 86 A second layer of photocatalyst is formed.

Since the vacuum cleaner has a higher mobility than the articles according to the other embodiments, the surface of the exterior component is easily damaged. In other words, the cleaner body and the mouthpiece often collide with furniture and wall surfaces while traveling on the floor surface, thereby causing scratches to be gradually formed, losing luster, etc. Not only can it be damaged, but it can also lead to damage, such as cracks, triggered by the scratch. In order to prevent this, a coating treatment with an ultraviolet curable acrylic resin or the like has been conventionally performed to secure the surface hardness. However, according to the present invention, TiO ₂ constituting a low-temperature curable high-active oxide photocatalytic thin film or SiO used as a binder is used.
The hardness of the film of ₂ is harder than ABS, 2H-4H in pencil hardness
When used for these exterior parts, they have the effect of making it hard to scratch such as scratches, and at the same time, they can obtain the original effects of antifouling and suppression of microbial growth. it can.

In particular, the handle portion 67 is a part that can be touched with bare hands, and it is easy for bacteria to propagate by using body fats such as attached sweat as nutrients. Conventionally, organic antibacterial agents such as imidazole and thiazoline are used. Inorganic antibacterial agents such as copper-based, zinc-based, and silver-based antibacterial agents have been kneaded into the molding resin to obtain an antibacterial effect, but these treatments are not required.

Further, since the mouth portion and the wheel portion are slid or rotated, the use of a vacuum cleaner in a dry environment makes it easy to charge static electricity. Often adheres to the surface. To prevent this, conventionally various surfactants, polyamides, polyethylene glycol and other hydrophilic polymers have been kneaded into the molding resin to prevent the surface resistance, but according to the present invention, Since the resistance value of the low-temperature curing type highly active oxide photocatalytic thin film can be reduced, an effect of preventing adhesion of dust and the like can also be obtained even with an ABS molding resin having a high electric resistance value. A hand operation unit 68 is attached to the handle 67, and a control board on which electronic components are mounted is attached to the back of the hand operation unit 68. Is charged, the malfunction of the control board may be induced, and the effect of preventing static electricity according to the present invention can prevent not only the adhesion of dust but also the malfunction of the control board.

The infrared signal transmitting section 69 provided in the hand operation section 68 and the infrared receiving section 59 of the cleaner body 1 are made of a transparent AS resin similarly to the case of the electric fan of the third embodiment. However, since a low-temperature-curable high-active oxide photocatalytic thin film is formed on the surface, an effect of preventing the contamination of the transmission and reception of infrared signals due to dirt can be obtained.

Further, the exhaust filter 84 attached to the exhaust ventilation section 76 of the main body is made of a non-woven fabric of a mixture of acrylic and PP. A thin film of the photocatalyst is formed. The exhaust ventilation section 76 is provided with a number of openings, and the air discharge surface of the exhaust filter 84 is irradiated with light such as room lighting or sunlight from the openings, so that the surface of the filter is also cleaned. Is done.

Further, since the upper cover 52 covering the upper part of the main body, the cover cover 53, the grill cover 54, and the handle 55 are made of transparent parts, external light reaches the inside and the dust collecting chamber 62 is formed. When a low-temperature curing type highly active oxide photocatalytic film according to the present invention is formed on the surface of the filter fibers of the paper filter 79 and the auxiliary filter 82, an antibacterial effect and a deodorizing effect can be obtained.

(Embodiment 5) A clothes dryer according to a fifth embodiment of the present invention will be described with reference to FIG.

FIG. 8 is a sectional view of the main body of the clothes dryer.
85 is an outer frame, 86 is an opening / closing lid, 87 is a rotating drum, 88
Is a heat source, 89 is an exhaust port, 90 is a two-wing fan, 91 is a fan casing, 92 is a motor as power, 93 is a belt for transmitting the power of the motor 92 to the rotary drum 87, 9
4 is a round belt for transmitting the power of the motor 92 to the two-wing fan 90, 95 is a first hermetic felt, 96 is a second hermetic felt, 97 is a partition plate, and 98 is discharged from the fan casing 91. A circulation duct for guiding the circulating wind to the heat source 88, a lint filter device 99, an FD beam 100 for fixing the fan casing 91 to the outer frame 85, a mounting ring 101 for mounting a bearing 102, and the rotating drum 87 The bearing 102 is rotatably slidably supported by the bearing 102. The rotating drum 87 is
Is transmitted through the belt 93 to rotate with the two-wing fan 90. This rotation stirs the clothes and generates a circulating wind (solid arrow) at the same time as the circulating wind is heated when passing through the heat source 88 and enters the rotating drum 87 to evaporate the moisture of the clothes. And let it dry. Thereafter, circulating air is sent to the heat source 88 through the circulation duct 98 by the double-wing fan 90, and is heated again to repeat drying of the clothes. A lighting fixture 104 having a fluorescent tube 103 is attached inside the opening / closing lid 86. A shock absorbing material 105 for absorbing impact is attached along the inner peripheral surface of the rotating drum 87. Buffer material 105 is P
Consists of P foam.

In the present embodiment, the cushioning material 10 is an inner part of the rotating drum 87, which is a part to which the light of the lighting equipment is irradiated.
5. The components such as the lint filter device 99 and the inner surface of the opening / closing lid 86 are made of ABS or PP resin, and a thin film of a low-temperature curing type highly active oxide photocatalyst of Sample No. 86 is formed on the surface thereof. After forming a film of the silane coupling agent on the surface of the target component, the first layer is formed. After forming this film, the low-temperature-curing type highly active oxide photocatalyst containing ATO of Sample No. 86 is used. A second layer is formed.

The luminaire can be optionally turned on during the drying operation or as an independent operation irrespective of the drying operation, and when the light of the fluorescent tube 103 is radiated, the illuminating device may be exposed to the organic substances and In addition, since the odorous substances contained in the contacting air are effectively oxidized and decomposed, the effect of suppressing the growth of microorganisms or deodorizing the microorganisms can be obtained.

During the drying operation, since the clothes are rotating,
Since the light does not reach evenly and evenly, it is more effective to use an operation program that turns on the rotating drum 87 for a certain period of time after the drying operation to clean the inside of the rotating drum 87.

The outer frame 1 is made of a galvanized steel sheet, and its outer surface is powder-coated with an epoxy resin. On the surface of this painted surface, a low-temperature curing type highly active oxide photocatalyst thin film containing ATO of sample No. 86 is formed.

The outer surface of the opening / closing lid 86 is made of an injection molded body of PS resin.
A low-temperature curable high-active oxide photocatalytic thin film containing O is formed.

The effect of the photocatalytic thin film on the outer surfaces of the outer frame 85 and the opening / closing lid 86, which are these exterior parts, is described in Examples 1 to 3 above.
As in the case of the exterior component of No. 4, indoor light can provide sufficient antifouling and antibacterial effects.

(Embodiment 6) A tableware dryer according to a sixth embodiment of the present invention will be described with reference to FIGS.

FIG. 9 is a perspective view of the appearance of a dish dryer.
FIG. 10 is an enlarged cross-sectional view near the exhaust port 128. FIG.
Shows a sectional view of the main body.

The interior of the main body 106 is divided vertically into a drying chamber 107 and an operation control chamber 108 by a partition plate 109. The operation control room 108 includes a fan motor 110, a blower fan 111, a casing 112, and a heater 113.
Blower unit 1 for sending dry air
A controller 118 is provided between the heating air blower unit 114 and an air inlet 117 having an air intake filter 116 connected to the drying chamber 107 by a duct 115. Further, an upper basket 119 and a lower basket 120 for storing tableware are arranged above and below the drying chamber 107. The lower cage 120 is mounted on a movable rail 12 connected to a hinge 122 so that it can be freely tilted below the door 121.
5 is disposed on a water pan 124 placed on the water tray 124.
Similarly, an upper car 119 is also provided on the movable rail 123. The movable rails 123 and 125 are arranged on a roller (not shown) rotatably provided on the side wall of the drying chamber 107 so as to be movable back and forth.
6 from the drying chamber 107 by pulling the lower basket 6 forward, and pulling the tip of the lower basket 120 from the drying chamber 107.
19 can be pulled out. Panel 12
The exhaust port 128 provided on the top 7 has a lattice shape and includes an exhaust filter 129. The partition plate 1 of the main body 106
09 and an exhaust duct 131 are connected to the drying chamber 107. The temperature detector 132 is arranged in the exhaust duct 131 which is hardly affected by the outside air temperature.

The intake port 117 is an injection-molded product made of PP, and the intake filter 116 is a nylon net. The surface of the intake filter 116 has a sample No. shown in Table 7 described later.
A thin film of a low-temperature curing type highly active oxide photocatalyst 91 is formed. After the nylon net is irradiated with ultraviolet rays, a thin film of a low-temperature-curable high-active oxide photocatalyst containing silver of Sample No. 91 is formed.

Since the indoor illumination light is applied to the surface of the intake filter 116, the attached organic matter and the odorous substances in the air taken in are oxidatively decomposed. Similarly, a sample No. 91 is provided in the exhaust port 128 and the exhaust filter 129.
Of the low-temperature curing type highly active oxide photocatalyst thin film. Exhausted moisture tends to condense around the intake and exhaust ports and become moist, and mold and bacteria may propagate,
The use of the photocatalyst with high decomposition efficiency according to the present invention can effectively suppress the growth of these microorganisms with room light. The formulation of Sample No. 91 is particularly suitable because silver itself contained in the composition has an antibacterial effect. In order to increase the antibacterial effect, ceramic particles such as zeolite or apatite carrying silver may be mixed.

A lighting fixture 134 having a fluorescent tube 133 is mounted inside the drying chamber 107. The illumination function is turned on when the door 121 is opened, and can be used not only for the original function of illumination such as checking the degree of drying of the tableware inside, but also for the function of cleaning the inside of the drying chamber 107. That is, by forming a photocatalytic thin film on the surface of the internal component of the drying chamber 107, an antibacterial and antifouling effect can be obtained in a portion irradiated with light. In the present embodiment, the upper car 119 and the lower car 120 have a structure in which a polyamide-based powder resin is baked and coated on an iron frame. A thin film of a low-temperature-curable high-active oxide photocatalyst containing copper is formed. These upper and lower baskets are members that come into direct contact with tableware, and are required to be clean.However, due to the effect of the photocatalyst, an antifouling effect on the surface and an effect of suppressing the growth of microorganisms are obtained. It is. Copper, like silver, has its own antibacterial action, so that the antibacterial effect is enhanced.

As in the case of the clothes dryer of Example 5, the dishes become shadows during the drying operation and the light does not reach the entire surface evenly.
It is more effective to use an operation program that cleans the inside of 107.

The door 121 is made of a molded article of ABS resin, and a low-temperature curing type highly active oxide photocatalyst thin film containing ATO of Sample No. 86 is formed on the surface of the door 121. The effect of the photocatalytic thin film on the surface of the door 121 is such that sufficient effects such as antifouling and antibacterial can be obtained with room light, as in the case of the exterior parts of the above-described first to fifth embodiments.

(Embodiment 7) FIGS. 12, 13 and 14
A dishwasher according to a seventh embodiment of the present invention will now be described.

FIG. 12 is a perspective view showing the appearance of the dishwasher.
13 and 14 show sectional views of the dishwasher.

A dish storage tank 136 is disposed inside the outer frame 135, and a step 138 is provided at a lower portion of the side wall of the table storage tank 136 in which a door 137 for opening and closing the front opening is provided. A lower basket 139 for storing tableware is removably arranged. A pump 140 is disposed outside the bottom of the tableware storage tank 136. This pump 140 has a pump motor 141. Lower basket 13 for storing tableware
A lower arm nozzle 142 that rotates just below the lower arm 9 is disposed. On the upper surface of the lower arm nozzle 142, a plurality of small holes 143 are provided. The lower basket 139 for storing tableware is provided with a Venturi tube 145 for sending the washing water sent from the pump 140 to the upper arm nozzle 144.
The upper arm nozzle 144 is provided with an upper basket 146 for storing tableware.
Is pivoted about the center just below the center. Upper arm nozzle 1
A plurality of small holes 147 are provided on the upper surface of 44. A heater 148 is arranged on the bottom or the back of the tableware storage tank 136. A heater cover 149 is arranged so as to enclose the heater 148. A water supply solenoid valve 150 is arranged on the outer surface of the tableware storage tank 136. An exhaust duct 151 is disposed on the upper surface of the tableware storage tank 136 and connected to the exhaust port 152. Door 137
A control panel 153 is arranged at the upper part of the outer surface. A drain pump 15 is provided outside the bottom of the tableware storage tank 136.
4 and a blower unit 155 are arranged.

During the cleaning operation, water is supplied from the water supply solenoid valve 150, the pump 140 is driven to supply the pressurized water to the lower arm nozzle 142, and at the same time, the heater 148 is energized to increase the water temperature. When water is blown out from the hole 143 and sent to the upper arm nozzle 144 via the Venturi tube 145, water also blows out from the hole 147. In this way, the upper and lower arm nozzles uniformly spray hot water onto the tableware in the tableware storage basket 146 while rotating to remove dirt. After the washing operation is completed, the drain pump 154 is energized to discharge waste water, and then the same operation as described above is repeated several times to rinse and remove internal dirt. When the final rinsing operation is completed, the operation proceeds to the drying operation. Electricity is supplied to the blower unit 155, the blower fan 156 is rotated, and passes through the blower duct 157 and the heater 148 arranged at the bottom of the tableware storage tank 136.
The wind is supplied into the tableware storage tank 136. At this time heater 1
Numeral 48 turns on / off the energization for a certain period of time to make the cool air hot air. The hot air converts the water droplets and residual water inside and the water droplets adhering to tableware into steam, and the exhaust duct 1
The air passes through the exhaust port 152 and is discharged outside the machine.

In the present embodiment, the exhaust port 152 is an ABS resin molded product.
A thin film of a low-temperature curable high-active oxide photocatalyst containing silver of 91 was formed. In the vicinity of the exhaust port, the discharged moisture tends to be dewed to form a wet state, and molds and bacteria may propagate.However, if a photocatalyst having a high decomposition efficiency according to the present invention is used, these can be effectively used with room light. The proliferation of microorganisms can be suppressed.

A lighting fixture 159 having a fluorescent tube 158 is mounted inside the tableware storage tank 136. The lighting function is turned on when the door 137 is opened, and can be used not only for the original function of lighting such as checking the degree of washing and drying of the inside tableware, but also for cleaning the inside of the tableware storage tank 136. That is, by forming a photocatalytic thin film on the surface of the internal component of the tableware storage tank 136, an antibacterial and antifouling effect can be obtained in a portion irradiated with light.

In this embodiment, the upper basket 146 for storing tableware is used.
The lower basket 139 for storing tableware has a structure in which an iron frame is baked and coated with a polyamide powder resin, and the surface of the coated surface is a low-temperature curable high-active oxide photocatalyst containing copper of sample No. 92. Is formed.

These upper and lower baskets are members that come into direct contact with tableware, and are required to be clean. However, the effect of the photocatalyst can prevent soiling of the surface and suppress the growth of microorganisms. Is kept.

Other members to which the light of the lighting equipment 159 is irradiated include a tableware storage tank 136 and an upper arm nozzle 14.
4, a lower arm nozzle 142, a venturi tube 145, and the like. These parts use a PP resin injection molded product or a SUS plastic deformation product. After a corona discharge treatment on the surface of these parts, a thin film of SiO ₂ alone, that is, a sample No. 12 of Table 1 was formed as an underlayer, and after this film was formed, a low-temperature curing type of sample No. 21 was formed. A thin film of a highly active oxide photocatalyst is formed.

The effect of improving the drying efficiency is a unique effect of the dishwasher by forming a photocatalytic thin film on the components inside the dish storage tank 136 and attaching the lighting fixture 159. This effect is due to the fact that TiO ₂ and SiO ₂ , which are the basic materials of the low-temperature curing type highly active oxide photocatalytic thin film according to the present invention, are materials having good water wettability, and at the same time, like oils and fats removed from dirty tableware. This is because even if a substance that repels water adheres, the substance is decomposed by the light of the lighting fixture 159, so that an effect of always maintaining high water wettability can be obtained.

In the dishwashing operation, the water temperature is raised to 60 to 70 ° C. at the time of the final rinsing, and after the internal temperature is raised, moisture is discharged to the outside by the blowing operation. The remaining water drops cause a decrease in drying efficiency. Components such as the tableware storage tank 136, the upper arm nozzle 144, the lower arm nozzle 142, and the venturi tube 145 are required to have high water resistance, and therefore often use a hydrophobic material, and usually have poor water wettability on the surface. On the surface of a material with poor water wettability, water does not spread in a film-like state and adheres in the form of water droplets having a high contact angle. During the cleaning operation, a detergent containing a surfactant is added, so that the surface tension of the cleaning water is reduced, the contact angle is reduced, and the cleaning water becomes well wet. Very low in surface tension of water. Therefore, at the end of the final rinsing, the rinsing water adheres to the surface of each component inside the tableware storage tank 136 in the form of countless water droplets having a high contact angle.

These water droplets having a high contact angle have a larger amount of water and are not easily dried, as compared with a case where a water film is spread in a thin film shape. In addition, since the water in the form of water droplets is reduced and dried while maintaining the shape of the water droplets during drying, the surface area is reduced, so that the drying speed is further reduced, and the time required for drying is about three times as long. Tableware is made of glass or ceramics with good wettability,
It is wooden and dries relatively quickly, but when it is finished with water drops on the dishwasher itself, the door 137 is opened and water drops fall on the dishes due to the vibrations when pulling out the upper and lower dish storage baskets. Then, a problem occurs in that the dried tableware is wetted.

Tableware storage tank 136, upper arm nozzle 14
4, when the parts such as the lower arm nozzle 142 and the venturi tube 145 are made of a PP molded product, the remaining amount of water due to attached water droplets at the end of rinsing is about 30 g, but the photocatalytic film according to the present invention is formed. In this case, the residual water amount is about 5
g. In addition, the low-temperature curing type highly active oxide photocatalytic thin film according to the present invention has high photoactivity and has an action of decomposing oils and fats attached by light of the lighting fixture 159, so that there is no decrease in water wettability due to the attachment of oils and fats.

As in the case of the dish dryer of the sixth embodiment, during the drying operation, the dishes become shadows and the light does not reach the entire surface evenly. It is more effective to use an operation program for cleaning the inside.

The door 137 is made of a molded product of PP resin. After the surface of the door 137 is subjected to a corona discharge treatment, a sample No. 12 is formed as an underlayer. After this film is formed, the sample No. 12 is formed. A low temperature curable high activity oxide photocatalyst thin film of .21 is formed.

The effect of the photocatalytic thin film on the surface of the door 137 is the same as in the case of the exterior parts of Examples 1 to 6 described above.
Sufficient antifouling and antibacterial effects can be obtained with room light. In this embodiment, the stationary dishwasher is described. However, the effect of the photocatalytic thin film can be obtained in the same manner in the case of a tabletop dishwasher. In the case of a tabletop type, since room light is applied to the front surface of the exterior component, it is effective to form a photocatalytic thin film on the surface of the side wall or the outer wall member on the ceiling.

(Eighth Embodiment) A kitchen waste disposal machine according to an eighth embodiment of the present invention will be described with reference to FIGS.

FIG. 15 is a perspective view showing the external appearance of a kitchen waste treatment machine, and FIG. 16 is a sectional view of the main body.

Inside the frame 160, a rotatable stirring blade 161 is provided at the center, and the garbage inlet 1 is provided at the upper part.
A processing tank 164 provided with a substrate 63 is disposed therein,
Contains 165. The culture base material 165 is a material obtained by cutting sawdust, rice hulls, rice straw, and the like, which is mainly composed of fibrous material that is hardly decomposed by microorganisms such as lignin, and each of which is porous and has voids. The particle size is complicated, and large voids are formed between the particles.

The rotating shaft 166 is provided with three stirring blades 161 and supported by bearings 167 provided in the processing tank 164.
The end of the rotating shaft protruding to one side is connected to the drive motor 168 by a transmission means 169 such as a chain with an appropriate reduction ratio. The upper opening 170 of the processing tank 164 has an inner lid 17.
1 is installed on the upper panel 172 so as to be openable and closable. Furthermore, near the upper part of the processing tank 164, a ventilation fan 173,
An intake port 174 and an exhaust port 175 are provided, and a ventilation fan 173 is provided.
By the rotation of, the decomposed gas and moisture generated in the processing tank 164 are discharged out of the machine through the exhaust port 175. Further, an appropriate mesh filter is disposed at each of the intake port 174 and the exhaust port 175.

Further, an opening / closing lid 176 for the intake port 174 is provided, and the intake port 174 is opened / closed by reciprocating a solenoid 177 attached to the frame 160. Further, an operation unit 178 for driving is provided on the upper panel 172, and the controller 179 is operated by this operation, and the kitchen waste disposal machine is operated.

[0124] After several months, the culture substrate 165 needs to be replaced because the void portion is filled with a decomposed substance or the like and the porosity is reduced, so that garbage cannot be processed. Therefore, processing tank 1
A discharge port 180 and a discharge path 181 are formed at the bottom of the bottom 64, and the culture substrate 165 dropped into the discharge path 181 can be taken out of the frame 160 by an operation of scraping the culture substrate 165.

The air in the upper space of the culture substrate 165 in the treatment tank 164 contains a large amount of substances having high odor intensity, such as trimethylamine, methyl mercaptan, ammonia, and hydrogen sulfide, as decomposition gas together with moisture. Due to the strong odor, the conventional kitchen waste disposal machine cannot be installed in the kitchen, and when installed on a veranda of an apartment house or the like, leakage of odor to surrounding areas has been a problem.

Conventionally, various deodorizing mechanisms using an adsorbent such as activated carbon or a manganese-based thermal decomposition catalyst have been devised as a deodorizing mechanism, but none of them is sufficient in terms of effect and life.

In this embodiment, exhaust filters 182 and 183 are provided at the exhaust port 175, and an ultraviolet lamp 184 is disposed between the exhaust filters. The exhaust filter 182 is mainly composed of zeolite, and the exhaust filter 183 is mainly composed of activated carbon. Each of the exhaust filters 183 has a honeycomb structure, and the ultraviolet rays emitted from the ultraviolet lamp 184 are radiated to the inside of the honeycomb. . On the inner surface of the honeycomb of each of the exhaust filters 182 and 183, a low-temperature curing type highly active oxide photocatalytic thin film of Sample No. 62 shown in Table 5 is formed.

The low-temperature curing type highly active oxide photocatalyst according to the present invention has a high decomposition efficiency, and in applications where the load of organic substances is relatively small as in the above-mentioned Examples 1 to 7, the level of indoor lighting equipment, that is, the wavelength, is low. The UV light of 250 to 350 (nm) has an illuminance of 0.001 to 0.01 mW / cm ² level, or 0.01 to 0.1 mW / cm by mounting a fluorescent lamp or an incandescent lamp.
Decomposition was possible at an illuminance of cm ² level, but in the case of a high load of, for example, a few ppm level in ammonia concentration as in this embodiment, it is necessary to arrange an ultraviolet ray generating means.

Although an ultraviolet lamp such as a mercury lamp or a metal halide lamp can be used, according to the present invention,
Since the decomposition efficiency is higher than that of the conventional oxide photocatalyst, the deodorizing effect is large, and the ultraviolet intensity is smaller than that of the case using the conventional oxide photocatalyst. When the input garbage is most actively decomposed, the above-mentioned odorous substances are generated in the largest amount.

The decomposition of garbage is usually carried out for 1 hour to
Since the time is most active, turning on the ultraviolet lamp 184 in accordance with this timing can also keep the life of the lamp long. The exhaust filter 183 is based on activated carbon. When the odor concentration is low, the odor is adsorbed on the activated carbon, and the adsorption efficiency gradually decreases as the adsorption amount increases. Then, the adsorbed malodorous substance can be decomposed to regenerate the activated carbon.

The frame 160 is made of a painted steel plate, and the outer lid 171 is made of an injection-molded product of PP resin. The surface is coated with an organic coating film of chlorinated polyethylene. On the surface, a thin film of a low-temperature curing type highly active oxide photocatalyst of Sample No. 21 is formed.

The effect of the photocatalytic thin film on the surface of the outer frame 160 and the outer lid 171 is the same as the effect of the exterior parts of Examples 1 to 7 described above. It is obtained. In particular, kitchen garbage processing machines handle garbage, and thus these exterior parts are often stained with juice dripping from the garbage. Therefore, the anti-fouling effect of the low-temperature curing type highly active oxide photocatalytic thin film of the present invention is large. When the kitchen waste disposal machine is placed outdoors, sunlight is irradiated on these exterior parts. The illuminance of ultraviolet light with a wavelength of 250 to 350 (nm) of sunlight is 0.1 to
As compared with the 5.0 mW / cm ² level and indoor lighting, the intensity is high, and dirt such as garbage juice can be decomposed.

In the above Examples 1 to 8, a path through which an air flow generated by an electric motor passes through an adherend such as various thermoplastics, a filtering mechanism such as a filter provided in the path, or The composition of a low-temperature-curable high-active-oxide photocatalytic thin film formed on the surface of exterior parts that are exposed to external light such as indoor lighting, or the parts that are provided inside the apparatus and that are exposed to light emitted by lighting equipment. In addition, the curing conditions of the film and the characteristics of each composition are described in Examples 9 to below.
16 will be described.

Example 9 A solution was prepared by dispersing TiO ₂ fine particles in a SiO ₂ sol. Using this solution, PE
A TiO ₂ film was formed on the T film to produce a PET film shown in FIG. The procedure is shown below.

First, a method for producing a SiO ₂ sol will be described. 5 g of tetraethoxysilane is added to 100 ml of water-
It was dissolved in a mixed solution of ethanol and propanol (3:27:70) and stirred at 40 ° C. for about 5 hours. The obtained solution was left at room temperature for 2 weeks to form a SiO ₂ sol.

Next, a method for preparing a solution in which TiO ₂ fine particles are dispersed in a SiO ₂ sol will be described. S made earlier
TiO ₂ fine particles in a weight ratio of TiO ₂ / Si in TiO ₂ sol
O ₂ = 9 was added. The solid concentration is 4wt%
And adjusted by adding necessary amount of water. After that, using a 5 mmφ zirconia ball, the TiO ₂ fine particles are dispersed in a SiO ₂ sol by a 24-hour ball mill,
A solution in which TiO ₂ fine particles were dispersed in _two sols was prepared.

The TiO _{2 formed} on the PET film 185
After coating with SiO ₂ sol in which fine particles are dispersed,
For 5 minutes while irradiating with a low-pressure mercury lamp (intensity: 15 mW / cm ² ) to form a plastic film coated with a TiO ₂ dispersed SiO ₂ film 188 in which TiO ₂ fine particles 187 are dispersed in an SiO ₂ film 186. The thin film obtained on the PET film 185 had good film quality and strength, and had a thickness of 300 nm.

The decomposition activity of organic substances by the titanium oxide was evaluated. The activity test was performed by coating the thin film with a red-violet organic dye and irradiating 1 (mW / cm ² ) light at 254 nm. The decomposition rate was determined from the amount of change from the initial transmittance of the dye. FIG. 20 shows the result.

For comparison, the results for the case without the TiO ₂ -dispersed SiO ₂ film and the case for the film without the SiO ₂ film are also shown for comparison. TiO
_There is almost no change in the pigment amount without the ₂ dispersed SiO ₂ film and with the SiO ₂ film, but 3% with the TiO ₂ dispersed SiO ₂ film.
A result of 45% decomposition was obtained after 0 minutes.

As described above, a PET film with a TiO ₂ dispersed SiO ₂ film having a photocatalytic function was produced. The film formation method of the present invention can be manufactured at about 120 ° C., and can be applied to plastic materials other than Pyrex glass substrates. 400 ° C. in a normal sol-gel method
Since a temperature of the order is required, application to plastic products is difficult, and crystallization of TiO ₂ requires a time of 10 minutes or more. On the other hand, since the film formation method of the present invention can form a film at a low temperature, a variety of substrates can be used, and a photocatalyst can be formed on any surface. In addition, the processing can be performed for a short time of several minutes, and the production cost can be significantly reduced.

Next, a cocatalyst was added to improve the performance of the photocatalyst. TiO in the SiO ₂ sol prepared earlier
Various nitrates were added to the solution in which the _two fine particles were dispersed, a film was formed on a PET film, and a decomposition reaction of the dye was performed. The results are shown in Table 1.

[0142]

[Table 1]

Na, Li, K, Mg, Ca, Sr, Zn
It was found that the added photocatalyst was effective, and Fe and Al became deactivators.

FIG. 21 shows the result of plotting the effect of adding a cocatalyst on the electronegativity. The smaller the electronegativity seems to be, the more effective it is. Particularly, since Li, Na, and Mg are effective, it was found that not only the electronegativity but also the ionic radius is important. FIG. 22 shows the relationship between the electronegativity, the ionic radius and the effect of addition. in this way,
Electronegativity is less than 1.6 and ionic radius is 0.2 nm
It has been found that it is effective to add an ion having a valence of 2 or less with a smaller element.

Example 10 Several types of solutions in which TiO ₂ fine particles having different particle sizes were dispersed in an SiO ₂ sol were prepared. The TiO ₂ / SiO ₂ ratio was set to 9 by weight, and Li
The addition amount was 5 wt%, and TiO ₂
A dispersed SiO ₂ film was formed on a PET film, and the decomposition rate after 10 minutes was examined using an organic dye.

[0146]

[Table 2]

Table 2 shows the conditions and test results of the prepared samples. From these results, it was found that the most effective size of the dispersed TiO ₂ particles was 8 to 10 nm. As described above, the decomposition rate changes depending on the particle size, and when the TiO ₂ / SiO ₂ ratio is further reduced, the TiO ₂
Although the optimum particle diameter of the fine particles changed, the decomposition rate was good in the range of 5 to 20 nm. Therefore, it was found that the TiO ₂ particle diameter of the Li-added catalyst should be 5 to 20 nm. The above results indicate that Na, K, M other than Li
The same applies to g, Ca, Sr, and Zn.

Example 11 Table 3 shows the amounts of Li added and TiO.
_The results of examining the dye decomposition rate and film strength when ₂ / SiO ₂ was changed are shown. The preparation of the solution and the film formation method were performed in the same manner as in Example 1. From these results, the conditions under which both the decomposition rate and the strength are effective are that the Li content is 0.5 to 20.
It was found that TiO ₂ / SiO ₂ was 9 to 5 in wt%.

[0149]

[Table 3]

Table 4 shows the results of examining the dye decomposition rate and the film quality when TiO ₂ / SiO ₂ and the film thickness were changed. The method of forming the solution and forming the film was the same as in Example 1, but the film thickness was adjusted by changing the solid content of the solution to 0.5 to 8 wt%.

As a result, it was found that when the film thickness was 100 to 500 nm, the decomposition rate and the film quality were good without being affected by the TiO ₂ / SiO ₂ ratio.

The above results indicate that Na, K, Mg,
The same applies to Ca, Sr, and Zn.

[0153]

[Table 4]

Example 12 Table 5 shows that oxide semiconductors other than TiO ₂ , such as ATO, ITO, ZnO, Fe ₂ O ₃ ,
The results of examining the dye decomposition rate when Cr ₂ O ₃ fine particles were added were shown. As a result, the addition of fine particles of ATO, Fe ₂ O ₃ , and Cr ₂ O ₃ was effective, and the addition amount was effective in any case, especially 10 to 20 wt% was most effective. Here, the electron affinity of the constituent elements of each oxide is as follows, and it has been found that it is effective to use an oxide semiconductor using a constituent element having an electron affinity of 1.2 eV or more.

[0155]

[Table 5]

Constituent elements TiSnInZnFeCr Electron affinity (eV) 1.25 1.2 0.2 -1.2 3.16 3.54 When the electron affinity of the oxide semiconductor is smaller than that of Ti, a Schottky barrier is formed at the particle interface of the fine particles. In addition, carriers of the added oxide semiconductor cannot be injected into TiO ₂ , and the effect is not exhibited. If the electron affinity of the oxide semiconductor contrast is smaller than that of Ti, the grain boundaries of the particles is not Schottky barrier formation becomes an ohmic junction, readily oxide semiconductor carriers TiO ₂
It is injected during and works effectively. AT that was particularly effective
O has an electron affinity slightly smaller than that of Ti, but there is almost no difference between them. This is because ATO, which is a conductive oxide, has a high carrier concentration, and a large amount of ATO is injected into TiO ₂ to improve the activity of the photocatalyst. Further, it was also found that the effect of adding Li was large even when such an oxide semiconductor was added.

[0157] As a method of effectively using the carriers of the oxide semiconductor, not only addition of fine particles but also lamination can be employed. Table 6 shows TiO ₂ / SiO ₂
The results when the film and the ATO film are stacked are shown. As a result, it was found that lamination was effective, and that the performance was further improved by adding Li to both. It has also been found that it is effective to alternately laminate a large number of times.

[0158]

[Table 6]

(Example 13) Particle size of 5 in SiO ₂ sol
A solution was prepared by dispersing TiO ₂ fine particles having a thickness of nm, and Ag, Pt, Pd, Rh, Ni, Cu, and RuO ₂ fine particles were each added to the TiO ₂ at 2 wt%. The TiO ₂ / SiO ₂ ratio was 9 by weight. Ag, Pt, Pd, and R were prepared in the same manner as in Example 1 using the prepared Ag and RuO ₂ fine particle-added TiO ₂ dispersed SiO ₂ sol.
A TiO ₂ -dispersed SiO ₂ film to which h, Ni, Cu, and RuO ₂ fine particles were added was formed on a PET film, and the decomposition characteristics of the organic dye were examined. The results were as shown in Table 7 for Ag, P
It was found that the decomposition rate was increased by the addition of t, Pd, Rh, Ni, Cu, and RuO ₂ fine particles.

[0160]

[Table 7]

Example 14 The decomposition characteristics of cigarette tar, acetoaldehyde, urea, and Escherichia coli using a fluorescent lamp, sunlight, an incandescent lamp, and a mercury lamp with respect to the Li-added photocatalyst and the Li-free photocatalyst prepared in Example 1. Were compared. As a result, as shown in Table 8, regardless of which lamp the Li-added photocatalyst used, the decomposition characteristics of cigarette tar, acetoaldehyde, urea, and Escherichia coli were 3 to 5 times as effective as those of the Li-free photocatalyst. Do you get it. As described above, it has been found that the Li-added catalyst can obtain a sufficient effect not only with an ultraviolet lamp but also with a lamp used in a living environment. Also,
Similar effects were obtained when Na, K, Mg, Ca, Sr, and Zn other than Li were added.

[0162]

[Table 8]

(Example 15) When the Li-added TiO ₂ -dispersed SiO ₂ film produced in Example 1 is formed directly on a PET film, the PET film as a substrate is damaged by a photocatalytic action. Thus, the L produced in Example 9
When coating the i-added TiO ₂ -dispersed SiO ₂ film, a film was prepared in which one SiO ₂ film was provided between the film and the PET film. Further, a sample in which each nitrate of Al, Fe, or Zr, which is a component for deactivating the photocatalytic action in the SiO ₂ film, or a sample in which ATO was added to the Li-added TiO ₂ dispersed SiO ₂ film was prepared. The test was performed. The results are shown in Table 9.

[0164]

[Table 9]

The results are as follows: Li-added TiO ₂ dispersed SiO ₂ film and P
By providing one SiO ₂ film as a barrier layer between the ET films, the film could be prevented from peeling off even when used for a long time. Furthermore, it was found that by adding Al, Fe, and Zr, the photocatalytic activity could be completely deactivated and the adhesive strength could be maintained. In addition, the ATO-added film added an antistatic effect to suppress the adhesion of dust and the like, was able to prevent not only the decomposition of organic substances but also the adhesion of inorganic substances, and produced a film having a better antifouling effect. .

The low-temperature curing type highly active oxide photocatalyst thin films having the compounding compositions shown in the above-mentioned Examples 9 to 16 were prepared.
The results of evaluating the specific effects of using various articles having a mechanism for generating an air flow by an electric motor as shown in FIG. 8 are summarized below. First, the effects of applying the low-temperature curing type highly active oxide photocatalyst thin film according to the present invention to a filtration mechanism provided in an air passage will be summarized.

A typical indoor air pollutant is tobacco smoke. The smoke of tobacco is a suspension of fine particles of tar substances and soots, and these fine particles form a film on the filter and accumulate, and the filter gradually becomes brown and stains. Smoke contamination of the tobacco was evaluated.
A polyester fiber non-woven fabric filter having a target area of 10 cm × 10 cm was fixed to the front side of the ventilation fan having an air flow rate of 5 (m ³ / min) on the suction side. The ventilation fan with the nonwoven fabric was placed in a container having a capacity of 45,000 (cm ³ ) and sealed. A cigarette smoke generator was also installed in this container. The cigarette smoke generator has a tube attached to the filter side of the lit cigarette, which tube is connected to a diaphragm pump. When the diaphragm pump is driven at an air flow of 1,800 (cm ³ / sec) and the end of the tube on the cigarette side is depressurized, the smoke that has passed through the cigarette filter is exhausted from the discharge side of the pump, and takes about 1.5 minutes. Burn one cigarette. When the cigarette smoke generator and the ventilation fan are driven in a container with such a configuration, the exhaust of the ventilation fan is also discharged into the container, so the smoke of the cigarette filled in the container passes through the nonwoven fabric filter many times. Will do. 5
After the cigarettes were continuously burned and the ventilation fan was driven for 10 minutes, the container was opened and the nonwoven fabric filter was removed to obtain a sample. On the fiber surface of this non-woven fabric filter, a low-temperature curing type highly active oxide photocatalytic thin film according to the present invention is formed. The creation method was the same as that described in Example 9. Although the ninth embodiment is directed to a PET film, here, a nonwoven fabric filter in which a surface oxidation treatment in an ozone atmosphere is performed in a solution obtained by adding lithium nitrate to a solution in which TiO ₂ fine particles are dispersed in a SiO ₂ sol. And hold it for 1 minute, then pull up the filter,
After the unnecessary solution is scattered by air blow, 12
The film was cured for 5 minutes while irradiating with a low-pressure mercury lamp (intensity: 15 mW / cm ² ) at 0 ° C. to cure the film and form a photocatalytic thin film on the fiber surface. The composition of this film is as shown in sample N in Table 1.
o.2.

The sample thus prepared was irradiated with light from a fluorescent lamp to evaluate the degree of decomposition of the adhered dirt. The evaluation is based on a color difference meter (Nippon Denshoku Industries Co., Ltd.)
Z-1001DP). The color difference in a stained state before light irradiation was set to 100%, and the color difference before attaching the tobacco stain was set to 0%, and the antifouling effect was evaluated. For comparison, sample No. 11 was obtained by simply dispersing TiO ₂ fine particles in SiO ₂ , and sample No. 1 was obtained by using only a SiO ₂ film containing no TiO ₂ fine particles.
In the case of No. 2, a thin film was similarly formed on the filter fiber surface and evaluated.

FIGS. 23 and 24 show the results. FIG.
Is the result of evaluating the degree of contamination of the filter by color difference over time when a smoke filter passing test was performed under the same conditions. Compared to untreated acrylic fiber, TiO ₂ and Si
When a glassy oxide photocatalyst thin film containing O ₂ as a component is provided, the discoloration is about 50% faster, that is, the smoke collection efficiency is improved by about 50%. FIG. 24 shows the degree to which the color of the discolored filter returns to the original color tone again by irradiating light from a fluorescent lamp to the filter that has discolored brown by adsorbing smoke under the above-described conditions and decomposes the deposit by the photocatalyst. It is a result evaluated by the measurement of time with time. The integrated light quantity in the figure is 25
It represents the integrated value of irradiation of light having a wavelength of 0 to 350 (nm). The sample No. 12 in the figure is a sample containing no TiO ₂
This is the case of only O ₂ , and almost no decoloring effect due to decomposition is observed. Sample No. 11 and Sample No. 2 contained the same amount of TiO ₂ , and both were effective. However, Sample No. 2 was a formulation according to the present invention to which LiNO ₃ was added. It can be seen that it has been greatly improved. In particular, in the initial stage, a high decomposition efficiency twice or more as high as that obtained without the addition of LiNO ₃ is obtained. In the case of an actual air purifier, a ventilation fan, or the like, since a small amount of dirt adheres and the room light is illuminated, the initial decomposition speed is important. As the amount of adhered dirt increases, the light is blocked by the dirt and becomes less likely to reach the photocatalytic thin film on the fiber surface, so that the decomposition efficiency also decreases. For this reason, it is important that the dirt be decomposed before being thickly attached.

In the actual environment, in order to attach the same amount of dirt to the filter as in this test using the above-described apparatus, the above-described ventilation fan was operated between 6 tatami mats (about 20 m ² ). And 20 cigarettes were burned and corresponded to the amount of dirt after operating for 120 minutes.

Next, the results obtained by examining the deodorizing effect when the low-temperature curing type highly active oxide photocatalyst thin film according to the present invention is applied to a filtration mechanism provided in an air passage will be summarized. Evaluation was made on the removal of ammonia as a representative malodorous substance. The study was conducted with the exact same configuration as that of the above cigarette. Instead of a cigarette smoke generator, a certain amount of ammonia gas is injected into the container, the ammonia gas concentration in the container is adjusted to 25 (ppm), and then a low-temperature curing type highly active oxide photocatalytic thin film is formed. The ventilation fan to which the nonwoven fabric was attached was driven. First, FIG. 25 shows the result of measuring the adsorption effect of ammonia gas by the vitreous oxide photocatalytic thin film as in the case of smoke collection. In the case of untreated acrylic fiber, 90% or more of ammonia gas remains even after 1 hour, whereas a glassy oxide photocatalytic thin film containing TiO ₂ or SiO ₂ as a component is attached. It can be seen that after 1 hour, the adsorption was removed to a concentration of 50 (%) or less. The effect of collecting ammonia gas as well as smoke is recognized.

After the ammonia gas was adsorbed until it was saturated, the incandescent lamp disposed inside the container was turned on so that light hit the filter surface. The ammonia gas concentration in the container was measured over time to evaluate the ammonia decomposition effect. FIG. 26 shows the result.

With the filter of Sample No. 12 containing no TiO ₂ , almost no change in concentration was observed. TiO
No. 11 and No. ₂ containing No. 2 showed that the ammonia gas concentration decreased with the irradiation of light and were decomposed.
Has significantly improved the decomposition efficiency due to the incorporation of LiNO _{3 according} to the present invention, and has obtained about three times the decomposition efficiency as compared with Sample No. 11.

The antifouling and deodorizing effects as described above have been described as typical examples of applications to air purifiers and ventilation fans. However, filters of various articles having the same mechanism can exhibit the same effect. Needless to say.

Next, the results of evaluating the specific effects of the various articles shown in Examples 1 to 8 when used as exterior parts are summarized below. As a sample, a thermoplastic ABS resin for injection molding (Technopolymer Co., Ltd .: Taflex 451, white colored product) used most frequently for exterior parts was used. A plate-shaped molded product of 5 cm × 5 cm was prepared, and the surface was subjected to corona discharge treatment. Example 1 was applied to the corona discharge treated surface.
A low-temperature curing type highly active oxide photocatalytic thin film having the composition of Sample No. 86 shown in Table 6 in Table 2 was formed. For comparison, the sample No. 11 in Table 1 was obtained by simply dispersing the TiO ₂ fine particles in SiO ₂ , and the sample No. 11 was obtained by using only the SiO ₂ film containing no TiO ₂ fine particles.
For No. 12, a thin film was similarly formed on the surface of the molded plate and evaluated. First, the evaluation of fouling by cigarette smoke was performed in the same manner as described above. The study was carried out with the exact same configuration as the above-mentioned test of the nonwoven fabric filter. A 5 cm x 5 cm ABS plate was fixed at the center of the part where the filter was placed, and after burning 10 cigarettes, the ventilation fan was driven for 120 minutes and white A
The BS plate was stained brown. The ABS plate was removed, irradiated with light under various conditions in the same manner as before, and the removal rate was evaluated by measuring the color difference before and after that. The result is shown in FIG.

As a result, almost the same results as in the case of the filter were obtained. However, since the amount of dirt adhering to the filter was smaller than that in the case of the filter, the same decoloring effect was obtained with a light amount of less than half. Sample No. 86 also contains ATO as an additive component in addition to LiNO ₃ .
As compared with No. 11, a slightly higher decomposition efficiency was obtained.

Next, the results of evaluating the antifouling effect when an article is used in an environment that uses a large amount of oil, such as a kitchen, and is contaminated with oil or fat will be summarized. A 5 cm × 5 cm glass plate on which a low-temperature curing type highly active oxide photocatalytic thin film having the composition of Sample No. 86 shown in Table 6 of Example 12 was formed,
Salad oil was thinly applied to a thickness of about 5 (μm) and irradiated with light from an ultraviolet lamp to measure the change in weight of the oil over time.
The result is shown in FIG. As a result, almost no change in weight was observed in the sample No. 12 containing no TiO ₂ . No. 11 and No. ₂ containing TiO ₂ are reduced in weight due to the oil being decomposed and volatilized with light irradiation.
The compound No. 11 greatly improved the decomposition efficiency by incorporating LiNO _{3 according} to the present invention, and the decomposition efficiency was about twice as high as that of Sample No. 11.

In forming the low-temperature curing type highly active oxide photocatalytic thin film according to the present invention, including the case of the series of examples described above, various methods are used to improve the adhesion to the base material. Can be. As a method using a primer, for example, it is effective to form a photocatalytic film after applying various coupling agents in advance.

As an example, a silane coupling agent and an organic titanium compound can be given.

Examples of the silane coupling agent include vinyl tris (β-methoxyethoxy) silane, vinyl triethoxy silane, vinyl totimethoxy silane, γ- (methacryloxypropyl) trimethoxy silane, β (3,4
Epoxycyclohexyl) ethyltrimethoxysilane,
γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, N-β
(Aminoethyl) γ-aminopropyltrimethoxysilane, n-β (aminoethyl) γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, γ-mercapto Propyltrimethoxysilane or the like can be used.

As the organic titanium compound, titanium ester, titanium acylate, and titanium chelate can be used. In particular, tetra-i-propoxytitanium, tetra-n-butoxytitanium, tetrakis (2-ethylhexyoxy) Titanium, di-i-propoxybis (acetylacetonato) titanium, titanium-i-propoxyoctylene glycolate, titanium stearate and the like are effective.

The surface of the object is oxidized using various surface modifying means to introduce a hydroxyl group, a carbonyl group, a carboxyl group, etc., so that the low-temperature curing type highly active oxide photocatalytic thin film of the present invention is firmly bonded. The method is also effective.

Specifically, methods such as ultraviolet irradiation, electron beam irradiation, corona discharge treatment, ozone atmosphere treatment and the like can be mentioned. In the case of a relatively hydrophilic resin such as a polyamide resin or a polyester resin, a high adhesive force can be obtained without performing the above pretreatment, but for a polyolefin resin or a highly crystalline resin, It is effective to perform these pre-processing.

In the present invention, as described above, it is effective to mix Ag or Cu as an additive component for increasing the activity of the photocatalyst. These can simultaneously lower the electrical insulation of the film itself, provide an antistatic effect, and also have an effect of suppressing the growth of microorganisms.
It is known that Ag and Cu ions have high antibacterial properties, particularly high bacterial resistance. When these Ag and Cu are used in combination, the propagation of microorganisms can be suppressed even when light is not applied.

The scope of application to which the present invention is applied is not limited to the above-described apparatus. That is, the principle of the present invention is that, by irradiating electromagnetic waves of a specific wavelength such as ultraviolet rays, the polymerization of the inorganic polymer can be promoted, and as a result, even if the surface of a material having low heat resistance such as plastics is used, TiO ₂ Taking advantage of the fact that an inorganic thin film of a photocatalyst containing TiO ₂ as a main component is formed and that the reaction activity of the photocatalyst containing TiO ₂ as a main component is increased several times by adding various components, A photocatalytic function is applied to the surface coated with thermosetting plastics or plastic materials from plastics, and by utilizing this principle, the surface of unprecedented low heat-resistant material is not available It decomposes organic matter with weak light intensity. Further, by adding semiconductor and conductive fine particles that lower the surface resistance value of the film itself, an antistatic effect on the surface of the coating film can be obtained, so that adhesion of dirt due to static electricity is reduced.

By installing the member having the above-described action according to the present invention at a portion where air flows through various devices, the attached organic matter can be effectively decomposed, so that an air flow is generated. Any device can be easily applied as long as the device has a structure for filtering or filtering the air flow.

As an example, the present invention can be applied to an oil fan heater, a gas fan heater, an electric heater, a kotatsu, and the like as a heating device. The present invention can be similarly applied to an air conditioner, a dehumidifier, or a cool fan. It can also be applied to heating or ultrasonic humidifiers. It can also be applied to heating utensils such as ovens and electromagnetic cookers. Can also be used for hair dryers. Further, it can also be used for devices having a cooling fan. That is, various types of computers such as personal computers and word processors, displays of such computer devices such as cathode ray tubes, devices using an electrophotographic mechanism such as copiers and laser beam printers, and devices such as liquid crystal projectors and slide projectors. The same cooling temperature as that of the present invention is applied to the attached cooling fan, the intake and exhaust ports used for ventilation of cooling air using the cooling fan of these devices, and the filter attached to those intake and exhaust ports. A curable high-active oxide photocatalytic thin film can be provided, and the same effect can be obtained.

[0188]

The effects of the present invention are summarized below.

In the present invention, a mechanism for generating an air flow by an electric motor, such as an air cleaner, a ventilation fan, a fan, a vacuum cleaner, a clothes dryer, a dish dryer, a dishwasher, and a kitchen waste disposal machine, is mainly provided. The low-temperature curing type highly active oxide photocatalyst thin film was installed on the air flow path, the filtration part, the exterior part, and the part illuminated by the built-in lighting mechanism of the electrical products used in the indoor environment. The following effects can be obtained.

According to the present invention, roughly three effects can be obtained.

First, according to the present invention, a thin film of a conventionally known oxide photocatalyst such as TiO ₂ contains Na, Li, etc., and has an electronegativity of less than 1.6 and an ionic radius of 0.2.
By adding an ion having an element smaller than nm and a valence of 2 or less, the effect of decomposing organic substances was enhanced.
Furthermore, in addition to this, an oxide semiconductor of a metal having an electric affinity of 1.2 or more, including antimony-added tin oxide, or a metal fine particle of Ag, Cu, Ni, Pd, Rh, or Pt is added in combination. Then, the decomposition efficiency further increased.
As a result, an effect that a mechanism for generating short-wavelength light, such as an ultraviolet lamp required by the conventional oxide photocatalyst, is not required can be obtained. In other words, light that is generally obtained indoors can be decomposed even by weak light such as fluorescent lamps, incandescent lamps, mercury lamps, and sunlight through window glass, and can be used to remove tobacco tar and sebum such as hand oil. Even if dirt from the kimono adheres, it is decomposed and an antifouling effect is obtained. Similarly, if weak light is used to disperse various odor-causing substances such as organic amines and mercaptans dispersed in the air, they will be decomposed and decomposed into low-odor or odorless substances. A deodorizing effect of reducing odor is obtained. Similarly, when various microorganisms such as bacteria, fungi, pollen, etc., which float in the air due to weak light, the microorganisms are killed or inhibited from growing by the action of decomposing organic substances. At the same time, the surface of the member on which the product is formed is kept clean, and at the same time, the effect of reducing the amount of microorganisms floating in the air in the room where these products are used can be obtained. In the past, parts that filter these air, such as filters and nets, are often treated as replacement parts, and when dirt accumulates or becomes clogged, the parts are removed and washed or replaced with new ones. However, according to the present invention, since the adhered dirt is decomposed, the life until the clogging is reached can be extended, and the frequency of replacement can be reduced.

Examples of specific effects in each application are shown below. Interior lighting and sunlight are applied to the outer frame, frame, and exterior parts of cases, such as air purifiers, ventilation fans, electric fans, vacuum cleaners, clothes dryers, dish dryers, dishwashers, and garbage disposal machines. Therefore, it is possible to maintain a clean state in which it is hard to be stained and the propagation of microorganisms is difficult. In addition, if air-flow components attached to these articles and components such as filters and nets in the air flow channels are installed so as to be illuminated with indoor lighting and sunlight, the same anti-fouling and anti-fouling properties can be obtained. Not only antibacterial but also deodorizing effect in the room can be obtained.

Regarding the antifouling effect, air purifiers, ventilators, electric fans, and vacuum cleaners may be provided with an infrared light receiving section in the main body and an infrared transmitting section in the remote controller section for remote control. There is also an effect of preventing a problem that dirt adheres to the infrared transmission / reception unit and hinders transmission / reception of a signal.

In general, when the load of dirt is so large that the intensity of light obtained in the room is not sufficiently decomposed, or when it is desired to use the member in a room where the light does not sufficiently come in, the lighting means such as a fluorescent lamp or a light bulb is used. The effect can be obtained if it is attached. If this is still insufficient, a high decomposition effect can be obtained by providing an ultraviolet generating means such as a mercury lamp or a metal halide lamp. In such a case, according to the present invention, since the decomposition efficiency is higher than before, the lighting time of the lamps can be shortened, and the output of the lamps can be reduced, so that power consumption can be saved and the life of the lamps can be reduced. And the frequency of replacement is reduced.

For example, a large amount of malodorous substances generated from a kitchen waste disposal machine may be decomposed, or a large amount of cooking oil may adhere to a kitchen fan, a dishwasher, a dish dryer,
When an effect of cleaning the inside of a closed tank or drum is required as in a clothes dryer, it is effective to use the above-described light generating means of various wavelengths in combination.

Second, according to the present invention, as described above, a photocatalytic thin film containing an antimony-added tin oxide or the like, a metal oxide semiconductor having an electric affinity of 1.2 or more, or Ag, C
Since the metal fine particles of u, Ni, Pd, Rh, and Pt are added, the surface resistance of the film itself can be kept low. The effect of this is that large-sized dust and fibers that take time to disassemble,
Alternatively, it is possible to suppress a phenomenon that minerals such as soil that cannot be decomposed adhere due to static electricity. By this action, it is possible to suppress a phenomenon that hardly decomposable dirt accumulates on the surface and prevents light from reaching the photocatalytic thin film surface.

This antistatic effect is effective not only in preventing contamination due to the attachment of dust and the like, but also in preventing malfunction of electronic circuits due to electrostatic charging. In particular, the effect is great for articles that are easily triboelectrically charged during use, such as a vacuum cleaner.

Specific examples of the effects in each application are shown below. Outer parts such as outer frames, frames, and cases of air purifiers, ventilation fans, electric fans, vacuum cleaners, clothes dryers, dish dryers, dishwashers, and garbage disposers are particularly effective because dust tends to adhere thereto. .

Third, in the present invention, when forming a photocatalytic thin film having the above-mentioned effects, a photocatalytic thin film is prepared from a solution containing a low molecular weight organometallic compound and water, and the bond between the metal atom and the organic group is formed. By irradiating electromagnetic waves of a required specific wavelength including ultraviolet light or the like in order to destroy the film, a reaction for forming a film is promoted, so that a thin film can be formed at a lower temperature than before. For this reason, the surface of general-purpose plastics, including ABS, PS, PP, polyester, etc. used for electrical products as described above, and organic paints applied to steel plates are softened by heat to the base material. Deformation,
The oxide photocatalytic thin film can be formed without causing problems such as generation of bubbles, generation of cracks, embrittlement, reduction in strength, and reduction in toughness.

Examples of specific effects in each application are shown below. Moldings of synthetic resin or painted steel plates commonly used for outer frames, frames, cases and other exterior parts of air purifiers, ventilation fans, electric fans, vacuum cleaners, clothes dryers, dish dryers, dishwashers, garbage disposal machines Are 300 ° C., which is the thin film forming temperature of the conventional oxide photocatalyst mainly composed of TiO ₂ or the like.
Although it could not withstand the above high temperature, according to the present invention,
The film can be easily formed without thermally damaging the substrate on these component surfaces.

The air flow path parts attached to the above-mentioned articles, the fans, blades, filters,
Similarly, it was extremely difficult to configure nets and the like from a material that can withstand heat treatment at 300 ° C. or higher, but the present invention has made it possible to easily form the oxide photocatalytic thin film.

Another effect is that the oxide photocatalyst thin film according to the present invention can form a hard film at a low temperature, and can be used as a substitute for a hard coat of an acrylic resin or the like which has been conventionally applied to the surface of a plastic molded product. There is also an effect.
As a result, similarly to the conventional hard coat, the gloss of the molded article can be increased, the surface can be prevented from being damaged, and an effect of suppressing the growth of microorganisms, an antifouling effect, and an antistatic effect can be obtained.

Further, in the case of application to filters made of non-woven fabric, woven fabric, sponge, etc., since the oxide photocatalytic thin film formed on the fiber surface is vitreous, the surface has good adsorptivity and wettability. Become. For this reason, there is an effect that odor collection and smoke particle collection efficiency are improved. Even if a thin film of SiO ₂ alone is formed, the trapping efficiency is improved by the same principle, but the trapping effect is reduced when odor or smoke particles adhere to the fiber surface, but the trapping effect is reduced. Due to the photocatalytic properties of the membrane itself, the fiber surface is always cleaned and the highly adsorbing substrate continues to be exposed, so that the effect is maintained.

Further, in the case of a dishwasher, the contact angle of water droplets adhering to the inside can be reduced by utilizing the antifouling effect of the photocatalyst. As a result, the total amount of residual water can be reduced, which has the effect of increasing the drying efficiency of tableware. By utilizing this effect, various applications can be applied to applications in which dew is difficult.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a filtration-type air purifier main body according to an embodiment of the present invention.

FIG. 2 is a perspective view of a filter-type air purifier main body according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of an electrostatic precipitating air purifier main body according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of the kitchen ventilator main body according to the embodiment of the present invention.

FIG. 5 is a sectional view of the electric fan main body according to the embodiment of the present invention.

FIG. 6 is a perspective view of the vacuum cleaner according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view of the cleaner body according to the embodiment of the present invention.

FIG. 8 is a main body sectional view of the clothes dryer according to the embodiment of the present invention.

FIG. 9 is a perspective view of the tableware dryer main body according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view of the main body of the dish dryer according to the embodiment of the present invention.

FIG. 11 is an enlarged sectional view of an exhaust port portion of the dish dryer according to the embodiment of the present invention.

FIG. 12 is a perspective view of a dishwasher main body according to the embodiment of the present invention.

FIG. 13 is a sectional view of the dishwasher main body according to the embodiment of the present invention.

FIG. 14 is a cross-sectional view of the dishwasher main body according to the embodiment of the present invention.

FIG. 15 is a perspective view of a kitchen waste treatment machine main body according to the embodiment of the present invention.

FIG. 16 is a sectional view of a kitchen waste treatment machine main body according to the embodiment of the present invention.

FIG. 17: TiO ₂ dispersion S formed on PET film
It is a cross-sectional view of iO ₂ film.

FIG. 18 is a cross-sectional view of a low-temperature curing type highly active photocatalytic thin film formed on an adherend.

FIG. 19 is a cross-sectional view of a low-temperature curing type highly active photocatalytic thin film formed in two layers on an adherend.

FIG. 20 is a diagram showing a decomposition test result of an organic dye.

FIG. 21 is a diagram showing the relationship between electronegativity and decomposition rate.

FIG. 22 is a diagram showing the relationship between electronegativity and ionic radius.

FIG. 23 is a view showing a smoke-collecting effect of a low-temperature curing type highly active photocatalytic thin film.

FIG. 24 is a view showing a photodecomposition effect of a smoke adhesion filter.

FIG. 25 is a diagram showing the ammonia collecting effect of a low-temperature curing type highly active photocatalytic thin film.

FIG. 26 is a diagram showing a photolysis effect of ammonia gas.

FIG. 27 is a view showing a photodecomposition effect of a smoke-adhered ABS plate.

FIG. 28 is a diagram showing the photolytic effect of salad oil.

[Explanation of symbols]

1: Air cleaner body, 2: Panel (inlet), 3, 36
... Filters, 14 ... Grills, 15, 20, 89, 12
8, 152, 175 ... exhaust port, 19, 117, 174 ...
Inlet, 21: Pre-filter, 24: Ozone removal filter, 30, 43: Electric motor, 31, 41: Blade, 33
… Orifices, 34, 133, 158… fluorescent tubes, 38…
Fan body base part, 39 ... prop, 40 ... slide pipe, 42 ... guard, 45 ... net, 50 ... vacuum cleaner body,
62: dust collecting chamber, 70: electric blower unit, 73: first exhaust ventilation path, 74: second exhaust ventilation path, 75: exhaust ventilation path,
76: exhaust ventilation section, 79: paper filter, 82: auxiliary filter, 84, 129, 182: exhaust filter, 8
5 ... Outer frame, 98 ... Circulation duct, 106 ... Main body, 107 ... Drying chamber, 116 ... Intake filter, 131,151 ... Exhaust duct, 134 ... Lighting equipment, 135 ... Outer frame, 136 ... Tableware storage tank, 155 ... Blowing Unit, 156: blower fan, 159: lighting equipment, 160: frame, 161: stirring blade, 163: garbage inlet, 164: treatment tank, 173
Ventilation fan, 184 UV lamp, 185 PET film, 186 SiO ₂ film, 187 TiO ₂ fine particles, 1
88: TiO ₂ dispersed SiO ₂ film, 189: plastic adherend, 190: lithium, 191: highly active photocatalytic film, 19
2: antistatic underlayer, 193: antimony-added tin oxide, 194: highly active photocatalytic film.

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁶ Identification symbol FI D06F 58/00 F24F 7/00 A F24F 7/00 7/013 101G 7/013 101 B09B 3/00 ZABD (72) Inventor Oishi Chiji 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Within Hitachi Research Laboratory, Hitachi, Ltd. Within the headquarters (72) Inventor Yuka Hirota 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Headquarters, Hitachi, Ltd.Electrical Equipment Division (72) Inventor Tetsuo Ishikawa 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture No. 1 Inside the Taga headquarters, Hitachi, Ltd.

Claims (32)

[Claims] An airflow generated by driving an electric blower takes in room air from an intake port, passes through a filter provided in a ventilation path, and causes dust, oil particles, and smoke floating in the air. An air purifier that collects, pollens, various microorganisms, or odorous substances, and then cleans and discharges it through the exhaust port. A coating film in which TiO ₂ fine particles are dispersed on the surface, an element having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm in the coating film,
An air purifier comprising a low-temperature curing type highly active oxide photocatalytic thin film, characterized by adding ions having a valence of 2 or less. 2. An air flow generated by driving an electric blower causes air taken in from an air inlet on the indoor side to be mixed with floating dust, oil particles, smoke, pollen, various microorganisms, or odorous substances. In a ventilation fan that discharges from the outside exhaust port to the outside, a coating film in which TiO ₂ fine particles are dispersed is formed on a surface of a component that comes into contact with indoor illumination light or sunlight from outside, among the component parts, An element having an electronegativity smaller than 1.6 and an ionic radius smaller than 0.2 nm,
A ventilator equipped with a low-temperature curing type highly active oxide photocatalytic thin film, wherein ions having a valence of 2 or less are added. 3. A fan in which blades are rotated by an electric motor to generate an air flow, wherein TiO ₂ fine particles are dispersed on a surface of a component which comes into contact with indoor illumination light or sunlight from outside. An element having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm in the coating film,
A fan equipped with a low-temperature curing type highly active oxide photocatalytic thin film, characterized by adding ions having a valence of 2 or less. 4. The suction port communicates with the dust collecting chamber, and the pressure in the general dust collecting chamber is reduced by an electric blower.
In a vacuum cleaner that collects dust and dirt taken in through the suction port into the dust collection chamber, filters out general dust and dirt, and then discharges air from an exhaust port, the indoor lighting light or the outdoor A film in which TiO ₂ fine particles are dispersed is formed on the surface of a component exposed to sunlight, and an element having an electronegativity of less than 1.6 and an ionic radius of less than 0.2 nm in the coating, A vacuum cleaner comprising a low-temperature curing type highly active oxide photocatalytic thin film, wherein ions having a valence of 2 or less are added. 5. An air introduced from the outside by an electric blower is heated by a heating heater and sent into a drying drum storing clothes containing moisture, and the clothes are heated to evaporate moisture. Parts that come into contact with indoor illumination light or sunlight from outside in clothes dryers that discharge moisture-containing air from the exhaust port or condensate moisture using a heat exchanger to remove moisture and then discharge the exhaust air from the exhaust port. A coating film in which TiO ₂ fine particles are dispersed is formed on the surface of the element having an electronegativity of less than 1.6, an ionic radius of less than 0.2 nm, and a valence of 2 or less. A clothes dryer provided with a low-temperature curing type highly active oxide photocatalytic thin film, characterized by adding ions. 6. An air blown from outside by an electric blower is fed into a drying chamber containing wet tableware after heating using a heater, and the tableware is heated to evaporate adhering water. In a dish dryer that discharges from the exhaust port together with the air containing moisture, a coating film in which TiO ₂ fine particles are dispersed is formed on the surface of a part that comes into contact with indoor illumination light or sunlight from outside. A low-temperature curable high-active oxide photocatalytic thin film characterized by adding an ion having an electronegativity of less than 1.6, an ionic radius of less than 0.2 nm, and a valence of 2 or less. Equipped tableware dryer. 7. After washing water by heating the water in the washing tank containing the dirty dishes by a washing pump while heating the water and jetting the water from a rotatable arm nozzle provided in the washing tank, the dishes are washed. , Perform a rinsing operation, and then take in the outside air with an electric blower, make it cool air or warm it with a heating heater, and replace the high humidity internal air after the rinsing operation, In a dishwasher that evaporates and dries residual moisture, a coating film in which TiO ₂ fine particles are dispersed is formed on the surface of a part that is exposed to indoor illumination light or sunlight from the outside, and the electronegativity in the coating film is reduced. A dishwasher provided with a low-temperature curable high-active oxide photocatalytic thin film, which is an element having an ionic radius smaller than 1.6 and an ionic radius smaller than 0.2 nm and having an added valence of 2 or less. . 8. Garbage is put into a treatment tank in which a culture substrate containing microorganisms is installed, and the garbage is stirred with the culture substrate using a stirrer. A garbage disposer that disassembles and discharges moisture generated during decomposition together with air using an electric blower. A coating film in which TiO ₂ particles are dispersed on the surface of parts that come into contact with indoor illumination light or sunlight from outside. Characterized by adding an ion having an electronegativity of less than 1.6, an ionic radius of less than 0.2 nm and an valence of 2 or less to the coating film. Garbage treatment machine equipped with a highly active oxide photocatalytic thin film. 9. The low-temperature curing method according to claim 1, wherein a melting point or a decomposition temperature of a material of a component forming the low-temperature curing type oxide photocatalytic thin film is 300 ° C. or less. An article provided with a highly active oxide photocatalytic thin film. 10. The material according to claim 1, wherein the material of the surface of the component forming the low-temperature-curable oxide photocatalytic thin film is an organic polymer or an organic polymer filled with an inorganic filler or an inorganic fiber. An article provided with a low-temperature curing type highly active oxide photocatalytic thin film, characterized in that: 11. The material according to claim 1, wherein the material of the component forming the low-temperature curable oxide photocatalytic thin film is an organic polymer or an organic polymer filled with an inorganic filler or an inorganic fiber. An article provided with a low-temperature curing type highly active oxide photocatalyst thin film, characterized by the following. 12. The photocatalyst according to claim 1, wherein said element is at least one of Na, Li, K, Mg, Ca, Sr and Zn. Articles with a thin film. 13. The article according to claim 1, wherein said TiO ₂ fine particles have a size of 5 to 20 nm. 14. The method according to claim 1, wherein the TiO ₂ fine particles are dispersed in SiO ₂ ,
An article provided with a low-temperature curing type highly active oxide photocatalytic thin film, wherein the weight ratio of O ₂ / SiO ₂ is 9 to 5. 15. The element according to claim 14, wherein the electronegativity of the element is smaller than 1.6, the ion radius is smaller than 0.2 nm, and the amount of ions having a valence of 2 or less is 0.5 to 20 wt. An article provided with a low-temperature-curable high-active oxide photocatalytic thin film, characterized in that: 16. The thin film according to claim 14, wherein the low-temperature curing type highly active oxide thin film has a thickness of 100 to 50.
An article comprising a low-temperature-curable high-active oxide photocatalytic thin film having a thickness of 0 nm. 17. The oxide photocatalytic thin film according to claim 1, which has an electronegativity of 1.
6, ionic radius is smaller than 0.2 nm,
In addition to an element having a valence of 2 or less, oxide fine particles mainly composed of an oxide semiconductor composed of a metal element having at least an electron affinity of 1.2 or more are dispersed. Article provided with a low-temperature curing type highly active oxide photocatalytic thin film. 18. The method according to claim 17, wherein the oxide fine particles mainly composed of an oxide semiconductor are ATO.
An article provided with a low-temperature-curable highly active oxide photocatalytic thin film, which is (antimony-added tin oxide). 19. The low-temperature-curable high-active oxide photocatalytic thin film according to claim 17, wherein the amount of the oxide fine particles mainly composed of an oxide semiconductor is 2 to 50 wt%. Goods. 20. claimed in claim 14, has a said oxide photocatalytic thin film has a plurality of layers stacked structure, TiO to SiO ₂ in the first layer counted from the surface ₂
An element in which fine particles are dispersed, the electronegativity is smaller than 1.6, and the ionic radius is smaller than 0.2 nm;
An oxide photocatalytic thin film to which ions having a valence of 2 or less are added has been formed, and the second layer counted from the surface has an oxide composed of a metal element having an electron affinity of at least 1.2 or more. An article provided with a low-temperature curing type highly active oxide photocatalytic thin film, wherein an oxide thin film in which oxide fine particles mainly composed of a semiconductor are dispersed is formed. 21. The oxide thin film according to claim 17, wherein oxide fine particles mainly composed of an oxide semiconductor composed of a metal element having an electron affinity of 1.2 or more are dispersed. An article provided with a low-temperature-curable high-active oxide photocatalytic thin film, wherein the fine particles are composed of at least one oxide of Sn, Fe, and Cr. 22. The method according to claim 20, wherein the oxide fine particles mainly composed of an oxide semiconductor are ATO.
An article provided with a low-temperature-curable highly active oxide photocatalytic thin film, which is (antimony-added tin oxide). 23. The method according to claim 20, wherein a film mainly composed of SiO ₂ to which at least one selected from Al, Zr and Fe is added is formed in the second layer counted from the surface. An article provided with a low-temperature curing type highly active oxide photocatalytic thin film. 24. The low-temperature curing type high-temperature resin according to claim 23, wherein ATO is added to at least one of the first layer counted from the surface and the second layer counted from the surface. Article provided with active oxide photocatalytic thin film. 25. The oxide photocatalytic thin film according to claim 1, which has an electronegativity of 1.
6, ionic radius is smaller than 0.2 nm,
In addition to the element which becomes an ion having a valence of 2 or less, P
An article provided with a low-temperature curing type highly active oxide photocatalytic thin film, wherein at least one of t, Rh, Pd, Ag, Cu, and Ni is added. 26. The method for forming a low-temperature-curable oxide photocatalytic thin film according to claim 1, wherein
It is formed from a solution containing a low molecular weight organometallic compound and water, and is irradiated with an electromagnetic wave containing a component having a specific wavelength necessary for breaking the bond between a metal atom and an organic group of the organometallic compound. Promoting the hydrolysis of the organometallic compound to form a prepolymer of metal oxide in the solution, and applying the solution of the prepolymer to the surface of the article and drying. An article provided with a low-temperature-curable high-active oxide photocatalytic thin film, characterized in that: 27. The method for forming a low-temperature-curable oxide photocatalytic thin film according to claim 1, wherein the low-temperature-curable oxide photocatalytic thin film is formed from a solution containing a low-molecular-weight organometallic compound and water. After applying the solution containing the organometallic compound of molecular weight and water to the surface of the target member, while the solution containing the organometallic compound of low molecular weight and water is in a wet state, the metal atoms of the organometallic compound and the organic Irradiating an electromagnetic wave containing a component having a specific wavelength necessary for breaking the bond with the group, promoting hydrolysis of the organometallic compound, and forming a prepolymer of a metal oxide in the solution, and An article provided with a low-temperature-curable high-active oxide photocatalytic thin film, comprising a step of drying the solution of the prepolymer. 28. The low-temperature curing method according to claim 26, wherein the electromagnetic wave containing a component having a specific wavelength necessary for breaking the bond between the metal atom of the organometallic compound and the organic group is ultraviolet light. An article provided with a highly active oxide photocatalytic thin film. 29. The method according to claim 1, wherein the oxide photocatalyst is TiO ₂ , SrTiO ₃ , BaTi
An article provided with a low-temperature curing type highly active oxide photocatalyst thin film, characterized in that one or more of O ₃ , WO ₃ , and SiC are used in combination. 30. The method according to claim 1, wherein conductive fine particles are dispersed in the coating film, the coating film has a surface resistance of 10 ⁹ Ω / □ or less, and has an antistatic function. An article provided with a low-temperature curable high-active oxide photocatalytic thin film, characterized in that: 31. The low-temperature low-temperature curing device according to claim 1, wherein a fluorescent tube or an incandescent lamp is provided at a position where the surface of the low-temperature curing type highly active oxide photocatalytic thin film is irradiated with light. An article provided with a curable highly active oxide photocatalytic thin film. 32. The low-temperature-curable high-activity oxidation according to claim 1, wherein an ultraviolet lamp is provided at a position where the surface of the thin film of the low-temperature-curable high-active oxide photocatalyst is irradiated with light. Article provided with a photocatalytic thin film.