KR100372756B1 - The Illuminator for Self-Cleaning - Google Patents

Abstract

The present invention relates to a luminaire having a self-cleaning function having an optical semiconducting composite ceramics film. In particular, the present invention relates to the decomposition of pollutants and NOx, SOx, odor gas, etc. attached to the luminaire by the photochemical reaction of the optical semiconducting composite ceramics. The present invention relates to a luminaire having a self-cleaning function to remove and sterilize microorganisms, and has problems such as prevention of deterioration of the substrate and reduction of film strength, durability, visible light transmittance, and photocatalytic activity in a conventional luminaire having a self-cleaning function. To solve the problems such as the complexity of the manufacturing process according to the formation of the multilayer film to provide a light fixture having a self-cleaning function that can exhibit a simple, inexpensive and effective photocatalytic activity.

The present invention for this purpose, first, a light semiconducting composite ceramics in which at least one metal ion of Ag, Zn, Cu is supported on a ceramic composition consisting of TiO ₂ , SiO ₂ , ZnO, etc. Coating the optical semiconducting composite ceramics on any one or two or more substrate surfaces, and drying and heat-treating the substrate of the coated luminaire, which does not cause deterioration of the substrate, and has excellent film strength and durability. The optical semiconductor has excellent crystallinity so that the transmittance of visible light is reduced and the excellent photochemical reaction is expressed even at a low energy amount.It carries one or more metal ions among Ag, Zn and Cu, and it is complicated in the manufacturing process by only one coating. The present invention relates to a luminaire having a self-cleaning function having an optical semiconducting composite ceramic film having improved problems.

Description

Lighting equipment with self-cleaning function {The Illuminator for Self-Cleaning}

The present invention relates to a luminaire having a self-cleaning function having an optical semiconducting composite ceramic film. More specifically, the light fixture having a self-cleaning function to have a sterilization function for the decomposition and removal of pollutants and NOx, SOx, odor gas, etc. and microorganisms attached to the light fixture by the photochemical reaction of the optical semiconducting composite ceramics The present invention relates to a light semiconducting composite ceramics in which at least one metal ion of Ag, Zn, and Cu is supported on a ceramic composition composed of TiO ₂ , SiO ₂ , ZnO, or the like. Coating the optical semiconducting ceramics on one or more substrate surfaces, and drying and heat-treating the substrates of the coated luminaires without causing deterioration of the substrates, excellent film strength and durability, and low visible light transmittance. And excellent crystallinity of optical semiconductor so that excellent photochemical reaction is expressed even at low energy amount, and at least one metal ion among Ag, Zn and Cu is supported. The present invention relates to a luminaire having a self-cleaning function having an optical semiconducting composite ceramic film having improved coating complexities with only one coating.

The lighting device having the self-cleaning function is used to prevent illuminance deterioration due to the attachment of pollutants in places with high pollution such as daily living spaces, underground shopping centers, hospitals, restaurants, tunnels, odor generating workplaces, water purifiers, and air purifiers. Reduction of cleaning / maintenance costs and hygienic environment by deodorization / sterilization function are possible.

It is generally known to use a photocatalyst film for deodorization, antifouling, and sterilization of lighting equipment, and the photocatalyst film is formed with electrons and holes formed in the optical semiconductor constituting the photocatalytic film by irradiation with ultra-violet (UV) light. Strong oxidation / reduction effect.

Although there are various methods of manufacturing the photocatalyst film, photochemical reaction by the optical semiconductor promotes deterioration of the applied substrate, and the photocatalyst film using titanium dioxide (TiO ₂ ), which is widely used as an optical semiconductor, has a larger refractive index than that of glass. As a result, interference due to the difference in refractive index and transmittance of visible light are reduced, and when the crystallinity of titanium dioxide (TiO ₂ ) is insufficient on the surface of the film, the activity of the photocatalyst is deteriorated. In order to solve this problem, as in patent application 1998-022399 (1998. 06. 15), to protect the reflective layer or powder coating layer formed on the surface of the substrate, such as the main body, direct and indirect reflector, lampshade, louver, etc. In order to improve the function, after forming the silica sol layer, a titanium dioxide solution may be formed on the surface, or at least two or more thin films may be formed on the outer surface of the glass valve as in Patent Application No. 10-131012 (1998. 04. 27). This two-layer thin film is laminated on a first thin film mainly composed of titanium oxide crystal fine particles disposed on a side close to the glass valve, and on the first thin film, and is sol-gel method from an organic titanium compound solution. A photocatalyst comprising a second thin film mainly composed of titanium oxide produced and comprising a thin film mainly composed of silicon dioxide disposed adjacent to the transparent cover glass. The luminaire has been proposed in the film. However, this method has the disadvantage of having to repeat the same coating process two or more times by forming a silica sol layer on the surface of the substrate, and then again forming a photocatalytic film after drying and heat treatment. Becomes

Further, as shown in Korean Patent Application No. Hei 10-181000 (1998. 06. 26), the surface of the substrate was formed on the uneven surface using silicon oxide, titanium oxide and aluminum oxide, and then a photocatalyst film mainly composed of titanium oxide fine particles was formed. The method of forming is known to reduce the difference in refractive index between the substrate having a small refractive index and the photocatalyst film having a large refractive index, to prevent interference phenomenon, and to improve the transmittance and transparency by the forming method. Since it is the same as 1998-022399 (1998. 06. 15) or the patent application No. 10-131012 (1998. 04. 27) has the same disadvantages.

Accordingly, an object of the present invention is to solve the problems of prevention of deterioration of a substrate and reduction of film strength, durability, visible light transmittance, photocatalytic activity, and the like in the conventional luminaire having a self-cleaning function as described above, and the formation of a multilayer film. It is to provide a lighting device having a self-cleaning function that can solve the problems such as the complexity of the manufacturing process according to the simple and inexpensive yet effective photocatalytic activity.

In addition, the present invention is the patent No. 132617 "Method for impregnating metal salts into fibers" obtained by the applicant for the study on such an optical semiconductor, Patent No. 176277 "Antibacterial ceramic composition" and Patent Application No. 1999512076427 (1999. 03. 22.) It is clear that this is an improved and advanced technology derived from "Optical semiconducting composite ceramics and its manufacturing method".

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The luminaire having an optical semiconducting composite ceramic film according to the present invention is a luminaire comprising an illuminating lamp, a reflecting plate and a glass cover, wherein the optical semiconductive composite ceramic is coated on one or two or more substrate surfaces of the luminaire. It is characterized by being made by drying and heat treatment.

Here, the manufacturing method of the lighting fixture having the self-cleaning function provided with the optical semiconducting composite ceramic film which consists of the above structure is as follows.

(1) Each sol is prepared by reacting one or more metals or metal salts of metals or metal salts such as TiO ₂ , SiO ₂ , ZnO with one or more of water, benzene, alcohol, hydrochloric acid, nitric acid, ammonia and hydrogen peroxide. And (2) supporting at least one metal ion of Ag, Zn, Cu in each of the above-mentioned sol, and (3) mixing each of the sol to which the metal ion is added. A first process comprising the steps of making an optical semiconducting composite ceramic composition.

Subsequently, the optical semiconducting composite ceramics manufactured through the above-described steps are coated onto the surface of any one or two or more substrates of the luminaire composed of an illuminating lamp, a reflecting plate, and a glass cover. A second process of coating by coating, spray-coat, roll-coat, or the like.

Light through a third process comprising the step of drying the substrate of the coated luminaire for about 5 minutes (min) at 60 ~ 120 ℃ and heat treatment for about 20 minutes (min) at 150 ~ 300 ℃ A luminaire having a self-cleaning function having a semiconducting composite ceramic film can be manufactured, and the drying time and the heat treatment time can be selectively changed according to the drying temperature and the heat treatment temperature.

In addition, the optical semiconducting composite ceramics are made of TiO ₂ sol made of Ti [OCH (CH ₃ ) ₂ ] ₄ and (CH ₃ ) ₂ CHOH, 0.57 mol / l, C ₈ H ₂₀ O ₄ Si, and ( 0.44 mol / l SiO ₂ sol made of CH ₃ ) ₂ CHOH, 0.5 mol / l ZnO sol made from Zn (C ₂ H ₃ O ₂ ) ₂ , one of Ag, Zn, Cu Carrying the above metal ions, the ratio of 50% TiO ₂ sol, 40% SiO ₂ sol, 9% ZnO sol and 1% of one or more metal ions among Ag, Zn, Cu Photoconductive composite ceramics are photocatalysts such as TiO ₂ and SiO ₂ that cause photoelectron reactions as electrons in valence bands are excited by conduction bands due to light absorption by UV irradiation. , ZnO is a photoconductive composite ceramic having photoconductive properties prepared by supporting at least one metal ion selected from Ag, Zn, and Cu in a ceramic composition.

EXAMPLE

Hereinafter, the present invention will be described in more detail with reference to the following examples.

In the embodiment of the present invention by coating the photo-semiconductor composite ceramics on the fluorescent lamp, the deodorizing effect, antifouling effect and antibacterial effect by the photochemical reaction of the coated fluorescent lamp was tested.

1) Deodorization (odor removal) effect experiment

end. Laboratory equipment: ① Gastec (Gastec: Model 801, Gastec co, Japan)

② sealed box (25cm × 25cm × 65cm)

I. Experimental Method: After injecting acetaldehyde as a source of odor into an airtight box, the result was measured to be 1,000 PPM, and the lamp was turned on to measure the change of acetaldehyde concentration over time.

All. Test condition: ① Room temperature: 25 ± 2 ℃

② Relative Humidity: 25 ± 2%

③ Sample amount: FL 20S EX-D / 18 × 3

la. Experiment result:

2) Antifouling (pollutant decomposition) effect experiment

end. Test equipment: Luminometer (Model BM-7, TOPCON CO, Japan)

I. Test method: Measure the change in luminance over time by using the measured value with the lamp turned on at the maximum brightness and applying the pollutant (red ink) to the surface of the lamp with the initial brightness as the initial brightness. Find the decomposition rate of the substance.

All. Test condition: ① Room temperature: 25 ± 2 ℃

② Relative Humidity: 55 ± 5%

③ Sample quantity: FL 20S EX-D18 × 1

la. Test result:

3) Antibacterial (bacterial killing) effect test

end. Test equipment: ① Aseptic working table (Clean Beanch: Deokwoo Science, Korea)

② Colony Counter (Colony Countor: Deokwoo Science, Korea)

③ Incubator (Dukwoo Science, Korea)

I. Test method: 10 ml of E. coli was added to the culture plate coated with the optical semiconducting composite ceramics and irradiated with a fluorescent lamp with a UV intensity of 0.5 mW / ㎠ to measure the mortality rate of bacteria at each time period. Comparative measurements were made in the same manner.

All. Test strain: Escherichia coli ATCC 25922

la. Test result:

In the embodiment of the present invention it can be seen that there is an excellent effect on the deodorizing effect, antifouling effect and bactericidal effect by the photochemical reaction of the optical semiconducting composite ceramics coated fluorescent lamp.

As described above, the luminaire having the self-cleaning function having the optical semiconducting composite ceramic film according to the present invention can obtain the following advantages over the conventional self-cleaning luminaire described above.

(1) A photocatalytic film that solves the problems of preventing degradation of the substrate of the photocatalytic film as described above, and lowering film strength, durability, visible light transmittance, and photocatalytic activity, and at the same time improves the complex problems in the manufacturing process by only one coating. By forming a semiconducting composite ceramic film, it is simple and inexpensive, and (2) forms titanium dioxide (TiO ₂ ) ultrafine particles having excellent crystallinity in photocatalytic activity, which is a disadvantage of the composite ceramic composition, and at least one metal of Ag, Zn, and Cu. By supporting the ions, electrons excited in the valence band by irradiation of ultraviolet rays are suppressed from recombination of electrons excited in the conduction band in a short time to maximize the active point of the photochemical reaction. Photochemical reactions are sufficient, as well as (3) decomposition of odorous substances by metal ions and sterilization of microorganisms. It is possible to express a more excellent deodorizing effect, antifouling effect and the sterilizing effect by the mechanism.

Preferred embodiments described in the specification of the present invention are illustrative and not restrictive, the scope of the invention is indicated by the appended claims, and all modifications falling within the meaning of those claims are included in the present invention. .

Claims (4)

(Iii) 0.57 mol / l TiO ₂ sol made of Ti [OCH (Cl ₃ ) ₂ ] ₄ and (CH ₃ ) ₂ CHOH, made of C ₈ H ₂₀ O ₄ Si and (CH ₃ ) CHOH One or more metal ions selected from Ag, Zn and Cu are supported on 0.5 mol / l of ZnO sol prepared from SiO ₂ sol 0.44 mol / l and Zn (C ₂ H ₃ O ₂ ) ₂ , This is a combination of 50% TiO ₂ sol, 40% SiO ₂ sol, 9% ZnO sol, and 1% at least one metal ion selected from Ag, Zn, and Cu. Manufacturing a semiconducting composite ceramics, (Ii) coating the optical semiconducting composite ceramics prepared in step (iii) on the surface of any one or two or more of the luminaires consisting of a lamp, a reflector and a glass cover; (Iii) A luminaire having a self-cleaning function having a light semiconducting composite ceramic film prepared according to the method comprising the step of drying and heat-treating the luminaire prepared in step (ii). delete (Iii) 0.57 mol / l TiO ₂ sol made of Ti [OCH (Cl ₃ ) ₂ ] ₄ and (CH ₃ ) ₂ CHOH, made of C ₈ H ₂₀ O ₄ Si and (CH ₃ ) CHOH One or more metal ions selected from Ag, Zn and Cu are supported on 0.5 mol / l of ZnO sol prepared from SiO ₂ sol 0.44 mol / l and Zn (C ₂ H ₃ O ₂ ) ₂ , This is a combination of 50% TiO ₂ sol, 40% SiO ₂ sol, 9% ZnO sol, and 1% at least one metal ion selected from Ag, Zn, and Cu. Manufacturing a semiconducting composite ceramics, (Ii) coating the optical semiconducting composite ceramics prepared in step (iii) on the surface of any one or two or more of the luminaires consisting of a lamp, a reflector and a glass cover; (Iii) a method of manufacturing a lighting fixture having a self-cleaning function comprising a light semiconducting composite ceramics film comprising the step of drying and heat-treating the lighting fixture prepared in step (ii). delete