JP3312132B2 - Air purification fan and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan for purifying air. More specifically, the present invention relates to a safe, economical and durable air purifying fan for purifying air by decomposing indoor odors and harmful substances in the air, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of comfort, the problem of odors in living spaces such as indoors and cars, and in working spaces such as offices and factories has been widely taken up.
In addition, pollution from automobile exhaust gas, NOx, SOx, and harmful chemical substances such as trichlorethylene and tetrachloroethylene has become a serious problem. Heretofore, as an air purifying device for performing deodorization and deodorization in a toilet, a room, and a car, a device incorporating a fragrance such as a perfume or a chemical deodorant, an ozone deodorizer, and the like have been used. However, in the case of using fragrances, the use of odors that are stronger than the odors does not decompose and remove odors,
There was also a drawback that it was not a fundamental solution and that the smell of the fragrance was transferred to other things such as food. Further, in the case of a chemical deodorant or ozone, it is itself a toxic substance, and there is a problem in safety. Furthermore, deodorizers using adsorbents such as activated carbon are used in narrow places such as refrigerators, but in such cases it is difficult to apply them to large places, and if the adsorption reaches saturation, it can be used more. There was a disadvantage that it disappeared (for example, Konosuke Nishida, Heibonsha "Great Encyclopedia")
Volume 1, p136 (1984)).

[0003]

DISCLOSURE OF THE INVENTION In view of the above, the present invention makes it possible to easily remove odors and harmful substances in the air without using fragrances or chemical deodorants, and furthermore, it is maintenance-free for a long period of time. An object of the present invention is to provide an air purifying fan that can be continuously and efficiently performed and has excellent characteristics in terms of economy, safety, durability, and the like, and a method for manufacturing the same.

[0004]

SUMMARY OF THE INVENTION The first invention is a surface or even a wing of the surface of the cover of the blades of a fan, pore size
Covered with titanium oxide film with uniform pores on the surface
An air purifying fan, wherein the titanium oxide film has a molecular weight
600 or more polyethylene glycol or polyethylene
Titania sol with oxide added
On the surface or the surface of the blade cover
The present invention relates to an air purifying fan characterized by being made by heating and firing .

[0005] The second invention is a titania sol obtained by adding a molecular weight of 600 or more polyethylene <br/> Chi glycol or polyethylene oxide was coated on the surface of the cover of the surface or even the blades of the blade of the fan, and heating and baking
And a titanium oxide film with pores of uniform diameter on the surface
The surface of the fan blades or the surface of the blade cover
According to the method of manufacturing the air cleaning fan, wherein the this covering.

[0006] The blade of the fan used in the present invention or the cover of the blade may be made of plastics or the like, but is preferably made of ceramics or metal in terms of heat resistance and chemical resistance. Is preferably plastic coated with metal. When made of glass, those made of heat-resistant glass such as quartz glass, silicate glass, alumina silicate glass, and borosilicate glass are particularly preferable.

The titania sol used in the present invention is obtained by suspending ultrafine titanium oxide in water or hydrolyzing an alkoxide of titanium obtained by a reaction between alcohol, titanium tetrachloride, and titanium metal. Prepared. Addition of alcoholamines such as diethanolamine and triethanolamine at that time will result in a uniform and transparent titania sol, which will be used to produce a titanium oxide film that is excellent in removing bad smells and harmful substances in the air. Can be.

The titanium oxide film used in the present invention is obtained by adding polyethylene glycol or polyethylene oxide to the thus obtained titania sol, and applying dip coating, spin coating, coating, spraying, or the like to the surface of a fan blade or a fan. After coating on the surface of the cover, it is obtained by heating and baking. At this time, it is desirable to heat and gradually raise the temperature from room temperature to fire. In addition, the final temperature of the heating at this time,
That is, the firing temperature is preferably from 600 ° C to 700 ° C. By this operation, the titania sol coated on the surfaces of the fan blades or the cover of the blades is converted into a titanium oxide film having an anatase crystal form, which is excellent in removing odors and harmful substances in the air. At this time, 6
Baking at a temperature of 00 ° C to 700 ° C or a baking temperature of 6
When the temperature is lower than 00 ° C. or higher than 700 ° C., only a titanium oxide film mixed with rutile or amorphous which has a low effect of removing bad smell and harmful substances in the air is obtained. In order to obtain a durable and high-performance titanium oxide film, the titania sol is thinly and uniformly applied, sprayed or spin-coated, or pulled up at a low pulling speed by dip coating. It is desirable to produce a multilayer film by heating and firing it, and repeating this operation. This makes it possible to obtain a transparent and porous titanium oxide film which is thick, durable, and excellent in removing odors and harmful substances in the air.

The polyethylene glycol or polyethylene oxide added to the titania sol used in the present invention preferably has a molecular weight of 600 or more. When the molecular weight is less than 600, the resulting titanium oxide film tends to peel off from the surface of the fan blade or the surface of the blade cover, and a clean and durable film cannot be formed.

[0010] The amount of polyethylene glycol or polyethylene oxide added to the titania sol used in the present invention is preferably not more than its solubility. When added in excess of the solubility, the pores do not become uniform in size and a clean film cannot be formed.

The size of the pores on the surface of the titanium oxide film covering the blades or the cover of the blades of the air purifying fan of the present invention is controlled by changing the amount of polyethylene glycol or polyethylene oxide added. be able to. When the amount is small, a titanium oxide film with small pores is obtained, and when the amount is large, a titanium oxide film with large pores is obtained.

In order to further improve the performance of the air purifying fan of the present invention, platinum, rhodium, ruthenium, palladium, nickel, manganese, silver, copper, zinc are applied to the surface of the blade or the titanium oxide film covering the cover of the blade. Etc. may be coated. Examples of a method for coating the surface with these metal films include a photoelectrodeposition method, a CVD method, and a PVD method such as sputtering or vacuum deposition. In this case, if the thickness of the metal film is too large, the cost increases, and light hardly reaches the titanium oxide thin film. Therefore, it is preferable that the thickness of the metal film is as thin as possible.

The air-purifying fan of the present invention thus obtained is placed in a room where the air is contaminated with odors and harmful chemicals, and when the blades are rotated, the oxidation of the blades or the surface of the cover of the blades occurs. Hazardous chemicals come into contact with the titanium film, and are decomposed by the redox effect of electrons and holes generated in the titanium oxide film by receiving light from the outside of the room and light from indoor fluorescent lamps and incandescent lamps, and is non-toxic・ It is deodorized.

In the air purifying fan of the present invention, the blades rotate at a high speed to flow indoor air and make efficient contact with the air, so that the indoor air can be quickly cleaned, and furthermore, low cost and energy saving are achieved. Suitable and maintenance-free. Furthermore, since the titanium oxide film covering the surface of the blade or the cover of the blade is porous, it absorbs odors and harmful chemical substances in the air to be decomposed efficiently. Then, platinum or rhodium on the titanium oxide film,
Ruthenium, palladium, nickel, manganese, silver,
When a copper or zinc metal film is coated, its catalytic action further enhances the effect of decomposing and removing organic compounds. In this case, since the titanium oxide film is porous, the metal is well dispersed, so that the catalytic action of the metal can be particularly effectively brought out.

Further, the air purifying fan of the present invention can only decompose and remove environmental pollutants such as NOx and malodorous substances in the air by the redox effect of electrons and holes generated in the titanium oxide film by receiving light. Rather, it can effectively prevent the growth of bacteria and mold. And when coating a metal film such as platinum, rhodium, ruthenium, palladium, nickel, manganese, silver, copper, zinc on the titanium oxide film,
Since the metal film has an antibacterial and antifungal action, it is possible to more effectively prevent the growth of various bacteria and mold on the film. Also in this case, since the titanium oxide film is porous and the metal is well dispersed, the catalytic action of the metal can be particularly effectively brought out.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Among the embodiments of the present invention, particularly representative ones will be described below.

Example 1 Titanium tetraisopropoxide was diluted with isopropanol, diisopropanolamine and water were added with stirring, and polyethylene glycol having a molecular weight of 10,000 was further added to prepare a transparent sol solution. The surface of the heat-resistant glass blade and the iron blade cover was coated with a titanium oxide film by dip coating. That is,
The blade or the cover of the blade was immersed in the sol solution, pulled up, dried, and then heated from room temperature to 650 ° C., and heated and baked. This was repeated 10 times to form a 0.4 μm titanium oxide film on the surface of the blade or the cover of the blade. As a result of examining the crystal structure of the obtained titanium oxide film by X-ray diffraction, it was found to be 100% anatase. Also,
When the surface was observed with an electron microscope, it was found to be
Was covered with small pores. Using the blades covered with the titanium oxide film and the cover of the blades, the air purifying fan shown in FIG. 1 was assembled and placed in a toilet, and the electric lamp of the toilet was turned on to turn on the air purifying fan. The stench has gone.

The illustrated air purifying fan has a drive structure similar to that of a normal fan.
It is adapted to be rotated by a rear electric motor 14. In the drawing, reference numeral 13 denotes a blade cover, 15 denotes a switch of an electric motor, and 17 denotes a main body. Of course, the air purifying fan of the present invention is not limited to the illustrated shape. For example, the blades may be of a rotary type and the cover of the blades may have a cage shape.

Example 2 Titanium tetraethoxide was diluted with ethanol, and while stirring, diethanolamine and water were added, and polyethylene glycol having a molecular weight of 3000 was further added to prepare a transparent sol solution. A titanium oxide film was coated on the surface of the blade and the cover of the blade. That is, the blade or the cover of the blade was immersed in the sol solution, pulled up, dried, and then heated from room temperature to 600 ° C. and baked. This operation was repeated 12 times to form a 0.5 μm titanium oxide film on the surface of the blade or the cover of the blade. As a result of examining the crystal structure of the obtained titanium oxide film by X-ray diffraction, it was found to be 100% anatase. When the surface was observed with an electron microscope, it was found to be covered with pores having a size of about 60 nm. Using the blades covered with the titanium oxide film and the cover of the blade, assembling an air purifying fan and placing it in the fish storage room, turning on the electric light in the room and turning the air purifying fan, the odor of the fish is greatly reduced. Reduced.

Example 3 Titanium tetrabutoxide was diluted with t-butanol, triethanolamine was added with stirring, and polyethylene oxide having a molecular weight of 100,000 was further added to prepare a transparent sol solution. The surface of the iron blade and the cover of the blade was coated with a titanium oxide film. That is, the blade or the cover of the blade was immersed in this sol solution, pulled up, dried, and then heated and gradually heated from room temperature to 700 ° C. and fired. This operation was repeated eight times to form a 0.3 μm titanium oxide film on the surface of the blade or the cover of the blade. The crystal structure of the obtained titanium oxide film was examined by X-ray diffraction.
Met. When the surface was observed with an electron microscope, it was found to be covered by pores having a size of about 600 nm. An air-purifying fan was assembled using the blades covered with the titanium oxide film and the cover of the blade, and placed in a room of Mahjongso filled with cigarette smoke. The indoor light was turned on and the air-purifying fan was turned. As a result, the unpleasant odor of cigarette smoke was greatly reduced.

[0021]

As described above, in the air purifying fan according to the present invention, the photocatalytic action of the titanium oxide film, that is, oxidation of the surface of the blade or the cover of the blade by receiving light from a light source such as an electric lamp or the sun. Odor and NOx and SOx are generated by the redox effect of electrons and holes generated in the titanium film.
It can detoxify and deodorize harmful chemical substances contaminating air such as x and organic solvents. The titanium oxide used in the present invention is also used in paints, cosmetics, toothpastes, etc., and has many advantages such as low cost, excellent weather resistance and durability, non-toxicity and safety. Moreover, the blade or the cover of the blade covered with the titanium oxide film is
If it becomes dirty by use, it can be easily washed with water and can be used for a long time, so it is extremely easy to handle.

Further, the air purifying fan according to the present invention comprises:
Compared to conventional methods such as ozone treatment, there is also an advantage that no toxic substance such as ozone is used, and low-cost, energy-saving, safe and maintenance-free use is possible.
In addition, the air purifying fan according to the present invention can not only deodorize and decompose harmful chemical substances in the interior of a car, a living room, a kitchen, a toilet, etc., but also can effectively prevent the growth of fungi and molds. Applicable to applications and extremely useful.

[Brief description of the drawings]

FIG. 1 is a front view of an example of the air purifying fan of the present invention.

[Explanation of symbols]

 Reference Signs List 11 blade 13 blade cover 14 electric motor 15 electric motor switch 17 body

Continued on the front page (72) Inventor Eiji Watanabe 41-year-old Zenta-Nitta-shaped character, Saya-cho, Kaifu-gun, Aichi Prefecture (72) Inventor Kazuichi Kato 1-10-1 Sakurayamacho, Showa-ku, Nagoya-shi, Aichi (72) Invention Person Hiroaki Yokoi 1498 Kitatakai, Yamato-cho, Ichinomiya-shi, Aichi Examiner Yoshihisa Seki (56) References JP-A-63-315137 (JP, A) JP-A-4-83537 (JP, A) JP-A-3-193679 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 53/86 B01J 21/00-38/74 C04B 38/00

Claims (7)

(57) [Claims] An acid having pores of uniform diameter on a surface of a fan blade or a surface of the fan and a cover of the blade.
Of an air cleaning fan coated with titanium film, before Symbol titanium oxide film, coating a titania sol molecular weight of 600 or more polyethylene glycol or polyethylene oxide is added to the surface or even the blade surface of the cover of the blade of the fan An air-purifying fan, characterized by being made by heating and firing. 2. The air purifying fan according to claim 1, wherein the pores have a diameter of 1 nm to 1 μm. 3. The air purifying fan according to claim 1 , wherein the crystal form of the titanium oxide film is anatase. 4. The surface of a fan blade or the surface of a fan blade and a cover of the blade are coated with titania sol to which polyethylene glycol or polyethylene oxide having a molecular weight of 600 or more is added, and then heated and fired to make the pore diameter uniform.
Titanium oxide film with fine pores on the surface
The method of manufacturing the air cleaning fan, characterized that you cover the surface or it with the blade surface of the cover. 5. The method for producing an air purifying fan according to claim 4, wherein the amount of polyethylene glycol or polyethylene oxide added to the titania sol is not more than its solubility. 6. The method for producing an air-purifying fan according to claim 4, wherein the temperature is gradually raised from room temperature to 600 ° C. to a final temperature of 700 ° C., followed by heating and firing. 7. The method for producing an air purifying fan according to claim 4, wherein the titania sol is prepared from an alkoxide of titanium and an alcohol amine.