JPH08173512A - Deodorizing element - Google Patents

Abstract

PURPOSE: To improve the far infrared radiation characteristic of a deodorizing element by applying only a photocatalyst or the photocatalyst and an absorbent on the surface of the radiation glass of a light radiating ultraviolet rays with a binder for deodorization. CONSTITUTION: A deodorizing coating 2 is applied on the surface of the glass of the radiation face of a light 1 radiation ultraviolet rays such as a black light or a white fluorescent lamp. When the light 1 is the fluorescent lamp, a lighting tube 3 is connected to a ballast 4. Only a photocatalyst 5 is applied as the deodorizing coating 2 for the specification that the light 1 deodorizes while it is lighted. The photocatalyst 5, an absorbent 6, and a binder 7 are mixed and applied for the specification that the light 1 deodorizes while it is not lighted and it is lighted at the time of regeneration. Titanium oxide is used for the photocatalyst 5, and one or more of activated carbon, synthetic zeolite H-ZSM5, ion-exchanged Cu-ZSM5, and Pt-ZSM5 are used for the absorbent 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing element which is installed in a room such as an air purifier, a refrigerator, an entrance storage, a toilet or the like for deodorizing.

[0002]

2. Description of the Related Art As a conventional deodorizing element of this type, for example, a household deodorizing agent, one using activated carbon has been generally used for a long time. This is for adsorbing odorous components in a refrigerator by diffusing or circulating air into fine pores on the surface of activated carbon formed in a granular or honeycomb shape.

Recently, there is also one using ozone. This is one in which some odors are decomposed by the oxidizing ability of ozone, the remaining odors are adsorbed by an ozone decomposing deodorizing catalyst whose main component is manganese oxide, and excess ozone is decomposed by the ozone decomposing deodorizing catalyst. Further, those using a room temperature decomposition catalyst containing an iron complex or gold as a main component are also commercially available. Further, a deodorizer of a type in which a photocatalyst is supported on activated carbon and a UV lamp is separately irradiated from a position distant from this is commercially available.

In addition to the deodorization mainly due to the above-mentioned adsorption action, a deodorizing element using a heating oxidation by energizing a honeycomb-shaped resistance heating inorganic material as disclosed in JP-A-4-132662 has been proposed. There is. In this method, a conductive inorganic material is molded and fired into a honeycomb shape to have an arbitrary resistance value, electrodes are formed on both ends, and only the oxidation catalyst or the oxidation catalyst and adsorbent is carried on the surface of the resistance heating inorganic material. It was done. With this, during deodorization or regeneration, the electrodes are energized to generate heat in the honeycomb-shaped resistance heating inorganic material itself, and the odor is oxidatively decomposed by the oxidation catalyst on the surface thereof.

[0005]

Among the conventional deodorizers configured as described above, the one using the adsorption action has the following problems. That is, in the case of using activated carbon, the amount of adsorption gradually increases and the deodorizing effect decreases, and finally the adsorption becomes saturated and the deodorizing effect disappears, and in some cases, it becomes a source of odor generation.

Further, even in the case of using ozone, when the deodorizing concentration is high, the odor is gradually adsorbed on the ozone decomposing deodorizing catalyst, and the deodorizing effect is reduced like activated carbon. Even in a room temperature decomposition catalyst, the decomposition rate at room temperature is extremely slow, and most of its deodorizing effect is due to adsorption, and the deodorizing effect similarly decreases unless energy for decomposition is applied.

In any of these adsorption methods, moisture is easily absorbed, and the deodorizing performance is extremely lowered in an atmosphere of high humidity. Furthermore, when the deodorizing effect disappears, it is necessary to replace the deodorant or replace the deodorizer itself. The same applies when the photocatalytic activated carbon is used, and when moisture is absorbed, almost no water is desorbed even when it is irradiated with ultraviolet rays.
Further, since the UV light source and the photocatalytic ceramic are separated, the UV absorption efficiency is not good.

On the other hand, in the deodorizing element using the heating and oxidizing action by energizing the honeycomb-shaped resistance heating inorganic material, it is not necessary to replace the deodorant, and even if moisture is absorbed, the absorbed moisture is desorbed by heating, so that the deodorizing performance is high. Recover. However, in order to reproduce by heating, it is necessary to raise the temperature of the deodorizing element to about 300 ° C. or more, and the ambient temperature unnecessarily rises, and there is a high risk in terms of safety. In addition, since the carrier itself easily absorbs water during deodorization of high-humidity gas, corrosion tends to occur when aluminum is used for the electrode. In addition, the complexity of the molding / firing process makes it expensive.

[0009]

The deodorizing element of the present invention has been made in view of the above-mentioned problems, and deodorizes only a photocatalyst or a photocatalyst and an adsorbent using a binder on the radiant glass surface of a light emitting ultraviolet rays. As a coat, a coating film having excellent far infrared radiation characteristics is formed.

[0010]

In the deodorizing element of the present invention having the above-mentioned structure, when only the photocatalyst is applied, the photocatalyst is excited by ultraviolet rays while it is on, and the odorous components passing near the coating film are oxidized at room temperature or at room temperature. Decompose and deodorize. Further, when the photocatalyst and the adsorbent are applied, the odorous components that pass near the coating film are adsorbed by the adsorbent even when the photocatalyst and the adsorbent are not turned on, so that deodorization at room temperature can be performed, and the light turns on when the adsorbed amount is saturated. As a result, the photocatalyst is excited and the adsorbed components are oxidatively decomposed at room temperature or at room temperature to be deodorized and regenerated.

By forming a coating film on the glass surface of the light, the coating film is heated at room temperature or below 100 ° C. due to the heat generation of the light itself and the heat generation due to the absorption of the ultraviolet rays of the deodorizing coat at the time of lighting, thereby promoting the oxidation action. In addition, the adsorbed water is also desorbed, so maintenance-free and deodorant performance can be maintained even in a high humidity atmosphere. Further, it can absorb ultraviolet rays, convert the wavelength, and emit far infrared rays.

[0012]

An embodiment of the deodorizing element of the present invention will be described below with reference to the drawings. 1 is a schematic configuration diagram showing an embodiment of the deodorizing element of the present invention, FIG. 2 is a sectional view of an essential portion showing an embodiment of the deodorizing element of the present invention, and FIG. 3 is an enlarged sectional view of an essential portion of FIG. 4 is a comparative explanatory view of acetaldehyde purification performance in a closed state of various adsorbent powders in a dry state, FIG. 5 is a comparative explanatory diagram of acetaldehyde purification performance in a high humidity state of a closed container of various adsorbent powders, and FIG. 6 is various adsorbents FIG. 7 is a comparative explanatory view of the purification performance of methyl mercaptan in a dry container in a powder closed container, and FIG. 7 is an explanation of the deodorizing performance by adsorption at low humidity and high humidity at room temperature in a closed box of an embodiment of the deodorizing element of the present invention. It is a figure.

In FIG. 1, reference numeral 1 is a light such as a black light or a white fluorescent lamp that emits ultraviolet rays having a wavelength near 350 (nm), and the deodorizing coat 2 is applied to the glass surface of the emitting surface of the light 1. is there. Further, when the light 1 used is a fluorescent lamp, the lighting tube 3 and the ballast 4 are connected. In FIG. 3, the deodorizing coat 2 adsorbs only the photocatalyst 5 in the case of the specification that deodorizes only during lighting, and deodorizes even when it is not lighting, and adsorbs the photocatalyst 5 in the case of lighting during regeneration. The agent 6 and the binder 7 are mixed and applied.

The deodorizing element having the above-described structure is installed in the deodorizing target space, and the odor is adsorbed to deodorize by natural diffusion or by forced ventilation in combination with a blowing fan to deodorize, and a timer is used to perform lighting reproduction.

When used as the adsorbent 6, synthetic zeolite H-ZSM5 and synthetic zeolite Cu-ZSM5, Pd-ZSM5 and activated carbon which are ion-exchanged with copper (Cu), palladium (Pb) and platinum (Pt). A comparison of purification performance between zeolite, manganese oxide (MnO—CuO, which is a mixture of manganese oxide powder and a small amount of copper oxide powder), and titanium oxide will be described with reference to FIGS. 4 to 6.

FIG. 4 shows 27 of 4 g of the above-mentioned various adsorbent powders.
FIG. 5 is a comparative explanatory diagram of acetaldehyde purification performance in a dry state in a liter closed container, and FIG. 5 is an explanatory diagram of acetaldehyde purification performance in a high humidity state in a 27 liter closed container of the various adsorbent powders 4 g, and FIG. 6 is a comparative explanatory view of the purification performance of methyl mercaptan in a dry state in which a 27 liter closed container of 4 g of each of the above adsorbent powders is placed.

4 to 6, a is a synthetic zeolite ion-exchanged with palladium (Pd), Pd-Z.
SM5, b is manganese oxide (MnO-CuO), C is granular activated carbon, d is sepiolite, and e is synthetic zeolite H-.
ZSM5, f is a synthetic zeolite ion-exchanged with platinum (Pt), Pt-ZSM5, h is a synthetic zeolite Cu-ZSM5 ion-exchanged with copper (Cu), and i is a characteristic curve of titanium oxide.

From the above FIGS. 4 to 6, synthetic zeolite H is obtained.
-ZSM5 and copper (Cu), palladium (P
d), synthetic zeolite C ion-exchanged with platinum (Pt)
It can be seen that u-ZSM5, Pd-ZSM5, Pt-ZSM5 and activated carbon have excellent adsorption performance and the adsorption performance is maintained even in a high humidity condition.

The specifications of the lighting reproduction type deodorizing coat manufactured this time will be described below. Titanium oxide powder ST-01 from Ishihara Sangyo Co., Ltd. as a photocatalyst for the deodorizing element, pentasil (H-ZSM5) powder with a silica / alumina ratio of 46, which is a synthetic zeolite from Nissan Kardler Co., Ltd. as an adsorbent, and Ternic Industries Co., Ltd. Betaq # 970, which is a room temperature curable colloidal silica-based binder, and ion-exchanged water at a weight ratio of 20: 20: 220: 140 for 2 hours in a ball mill, and then dried on the surface of the radiant glass of commercially available Blacklight FL4BL. To 100 (mg / cm ² ) several times and dried in a 100 ° C. drying oven for 1 hour.

FIG. 7 shows the purification performance of methyl mercaptan in a 27 liter hermetically sealed container of the deodorizing element manufactured at low humidity and high humidity. In FIG. 7, r is dry state initial adsorption (27 ° C., 12% RH), s is high humidity state initial adsorption (27 ° C., 95% RH), t is high humidity state 1 hr (hour)
It is a characteristic curve of adsorption (27 ° C, 95% RH) after lighting and regeneration.

[0021]

The deodorizing element of the present invention has the above-mentioned structure, and the invention according to claim 1 forms an inorganic coating film having a characteristic of absorbing ultraviolet rays and converting wavelengths into far infrared rays on a glass surface of a light emitting ultraviolet rays. By doing so, it is possible to cut off ultraviolet rays that are harmful to the human body and emit far-infrared rays effective for maintaining the health of the human body and maintaining the freshness of fruits and vegetables.

In addition to the effect of the invention of claim 1, in addition to the effect of the invention of claim 1, a deodorizing coat containing a photocatalyst is applied to the glass surface of a light that emits ultraviolet rays, whereby the deodorizing coat of the light is turned on. Since the photocatalyst is efficiently excited by receiving ultraviolet rays, the odorous components passing near the lamp can be efficiently deoxidized by oxidizing and decomposing at room temperature. further,
During lighting and deodorization, oxidative decomposition is promoted by the heat generated by the light itself and the heat generated by the absorption of ultraviolet rays from the deodorizing coat, and the adsorbed water is also desorbed, so the deodorizing performance is maintained even in a humid atmosphere.
It is a maintenance-free deodorizing element.

In addition to the effect of the invention described in claim 1, the invention described in claim 3 does not emit light by applying a deodorizing coat containing a photocatalyst and an adsorbent on the glass surface of a light emitting ultraviolet light. At times, the adsorbent on the deodorizing coat adsorbs odorous components near the deodorizing coat to deodorize, and by turning on the light occasionally, the photocatalyst on the deodorizing coat efficiently receives ultraviolet rays and is excited, so that the adsorbed components are oxidized and decomposed at room temperature. It is detached and regenerated efficiently. Furthermore, during lighting and reproduction, oxidative decomposition is promoted by heat generation of the light itself and heat generation by absorption of ultraviolet rays of the deodorizing coat, and adsorbed water is also desorbed, so that the deodorizing performance is maintained even in a humid atmosphere, and the deodorizing element becomes a maintenance-free deodorizing element. Further, since the light need only be turned on during reproduction, the life of the light is significantly extended.

In addition to the effect of the invention of claim 2 or claim 3, the invention of claim 4 has titanium oxide as a photocatalyst and activated carbon or H-ZSM as an adsorbent.
Since 5 or a synthetic zeolite obtained by ion-exchange of 5 is used, it is possible to provide a deodorizing element that has excellent adsorption performance, is not easily influenced by humidity, is highly resistant to poisoning by sulfur, and has a high bactericidal effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a deodorizing element of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing an embodiment of a deodorizing element of the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part of FIG.

FIG. 4 is an explanatory diagram of acetaldehyde purification performance comparison in a dry state in a closed container of various adsorbent powders.

FIG. 5 is a comparative explanatory view of acetaldehyde purification performance in a high humidity state in a closed container of various adsorbent powders.

FIG. 6 is a comparative explanatory view of methyl mercaptan purification performance in a dry state in a closed container of various adsorbent powders.

FIG. 7 is an explanatory diagram of deodorizing performance in a closed container of an example of the deodorizing element of the present invention.

[Explanation of symbols]

 1 Light 2 Deodorizing coat 3 Lighting tube 4 Ballast 5 Photocatalyst 6 Adsorbent 7 Inorganic binder

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01J 35/02 J

Claims (4)

[Claims] 1. A deodorizing element for deodorizing when installed in a space such as indoor air purifier, refrigerator, entrance storage, toilet, etc., by absorbing ultraviolet light on the radiant glass surface of a light emitting ultraviolet light, A deodorizing element characterized by being formed with an inorganic coating film having excellent far infrared radiation characteristics. 2. The deodorizing element according to claim 1, wherein the inorganic coating film comprises a photocatalyst and a binder. 3. The deodorizing element according to claim 1, wherein the inorganic coating film comprises a photocatalyst, an adsorbent and a binder. 4. Titanium oxide is used as the photocatalyst and activated carbon or synthetic zeolite HZ is used as an adsorbent.
SM5 or Cu-ZSM5 ion-exchanged with it,
The deodorizing element according to claim 2 or 3, wherein at least one of Pd-ZSM5 and Pt-ZSM5 is used.