Deodorizing element

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention relates to a deodorizing element that is installed in a space such as an indoor air purifier, a refrigerator, an entrance storage, and a toilet to deodorize.

【0002】

[Conventional technology]

As a conventional deodorizing element of this kind, for example, a household deodorant, activated carbon has been generally used for a long time. In this method, the odorous components in the chamber are adsorbed by diffusion or circulating ventilation in the fine pores on the surface of the activated carbon molded into a granular or honeycomb shape.

【0003】

Recently, there are some that use ozone. In this method, a part of the odor is decomposed by the oxidizing ability of ozone, the remaining odor is adsorbed by the ozone decomposition deodorizing catalyst containing manganese oxide as a main component, and the excess ozone is decomposed by the ozone decomposition 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 an ultraviolet lamp is separately irradiated from a position away from the photocatalyst is also commercially available.

【0004】

In addition to the above-mentioned deodorization mainly due to the adsorption action, a deodorizing element using heat oxidation by energizing a honeycomb-shaped resistance-generating inorganic material as disclosed in Japanese Patent Application Laid-Open No. 4-132662 has been proposed. This is done by molding and firing a conductive inorganic material into a honeycomb shape so that it has an arbitrary resistance value to form electrodes at both ends, and carrying only an oxidation catalyst or an oxidation catalyst and an adsorbent on the surface of the resistance-generating inorganic material. It was done. With this, the electrodes are energized during deodorization or regeneration to generate heat of the honeycomb-like resistance-generating inorganic material itself, and the odor is oxidatively decomposed by the oxidation catalyst on the surface.

【0005】

[Problems to be Solved by the Invention]

Among the conventional deodorizers configured as described above, those using the adsorption action have 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.

【0006】

Even when using ozone, if the deodorizing concentration is high, the odor is gradually adsorbed on the ozone decomposition deodorizing catalyst, and the deodorizing effect is reduced as with activated carbon. Even in a room temperature decomposition catalyst, the decomposition rate at room temperature is extremely slow, and the deodorizing effect is mostly due to adsorption, and the deodorizing effect is similarly reduced unless energy for decomposition is applied.

【0007】

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

【0008】

On the other hand, in a deodorizing element that uses a heating oxidation action by energizing a honeycomb-shaped resistance-generating inorganic material, it is not necessary to replace the deodorant, and even if moisture is absorbed, the moisture-absorbed moisture is desorbed by heating, so that the deodorizing performance is restored. However, in order to regenerate by heating, it is necessary to raise the temperature of the deodorizing element to about 300 ° C or higher, and the ambient temperature rises unnecessarily, and there is a high risk in terms of safety. Further, since the carrier itself easily absorbs water when deodorizing a high humidity gas, it is easily corroded when aluminum is used for the electrode. Furthermore, it is expensive due to the complexity of the molding and firing process.

【0009】

[Means for solving problems]

The deodorizing element of the present invention has been made in view of the above problems, and has excellent far-infrared radiation characteristics by forming a deodorizing coating on the surface of the radiating glass of a light that emits ultraviolet rays by using only a photocatalyst or a photocatalyst and an adsorbent as a binder. A coating film was formed.

【0010】

[Action]

In the deodorizing element of the present invention, when only the photocatalyst is applied in the above configuration, the photocatalyst is excited by ultraviolet rays while it is lit, and the odorous component passing near the coating film is oxidatively decomposed at room temperature or higher. Deodorize. Further, when the photocatalyst and the adsorbent are applied, the odorous component passing near the coating film is adsorbed by the adsorbent even when it is not lit, so that it can be deodorized at room temperature and lights up when the adsorption amount is saturated. As a result, the photocatalyst is excited to oxidize and decompose the adsorbed component at room temperature or at room temperature to make it odorless and desorb, so that it is regenerated.

【0011】

By forming a coating film on the glass surface of the light, the coating film is heated at room temperature of 100 ° C or less by the heat generated by the light itself and the heat generated by the ultraviolet absorption of the deodorizing coat at the time of lighting, and promotes the oxidizing action. Since the adsorbed water is also desorbed, it is maintenance-free and can maintain deodorizing performance even in a high humidity atmosphere. Furthermore, it can absorb ultraviolet rays, convert wavelengths, and emit far infrared rays.

【0012】

[Example]

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

【0013】

In FIG. 1, reference numeral 1 denotes a light that emits ultraviolet rays having a wavelength of around 350 (nm), such as a black light or a white fluorescent lamp, and a deodorizing coating 2 is applied to the glass surface of the radiation surface of the light 1. Further, when the light 1 to be used is a fluorescent lamp, the glow starter 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 of deodorizing only while it is lit, and adsorbs with the photocatalyst 5 in the case of the specification of deodorizing while it is not lit and lit during regeneration. The agent 6 and the agent 6 are mixed with the binder 7 and applied.

【0014】

The deodorizing element having the above configuration is installed in the space to be deodorized, and the odor is adsorbed by forced ventilation by natural diffusion or in combination with a blower fan to deodorize, and lighting and regeneration are performed at regular intervals by a timer.

【0015】

Synthetic zeolite H-ZSM5 and synthetic zeolite Cu-ZSM5, Pd-ZSM5 and activated charcoal, zeolite, which are ion-exchanged with copper (Cu), baradium (Pb), and platinum (Pt) when used as the adsorbent 6. A comparison of the purification performances of manganese oxide (MnO-CuO, 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.

【0016】

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

【0017】

In FIGS. 4 to 6, a is a synthetic zeolite ion-exchanged with palladium (Pd), Pd-ZSM5 and b are 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.

【0018】

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

【0019】

The specifications of the lighting reproduction type deodorizing coat prototyped this time will be described below. Titanium oxide powder ST-01 from Ishihara Sangyo Co., Ltd. as a photocatalyst for deodorizing elements, and pentadil (H-ZSM5) powder with a silica / alumina ratio of 46, which is a synthetic zeolite from Nissan Cardler Co., Ltd., as an adsorbent. Betac # 970, a room temperature curable colloidal silica-based binder, and ion-exchanged water in a weight ratio of 20:20:2 20:140 are mixed in a ball mill for 2 hours, and then dried and applied to the surface of the radiated glass of commercially available black light FL4BL. Is 100 (mg / cm)²), And dried in a 100 ° C drying oven for 1 hour.

【0020】

Figure 7 shows the purification performance of methyl mercaptan in a 27-liter airtight container of the prototype deodorizing element at low and high humidity. In Fig. 7, r is the initial adsorption in the dry state (27 ° C, 12% RH), s is the initial adsorption in the high humidity state (27 ° C, 95% RH), and t is the adsorption after lighting and regeneration in the high humidity state for 1 hr (hours). It is a characteristic curve of (27 ° C, 95% RH).

【0021】

[Effect of the invention]

The deodorizing element of the present invention has the above configuration, and the invention according to claim 1 is a human body by forming an inorganic coating film having a property of absorbing ultraviolet rays and converting the wavelength into far infrared rays on the glass surface of a light that emits ultraviolet rays. It can block ultraviolet rays that are harmful to humans and emit far infrared rays that are effective for maintaining the health of humans and the freshness of fruits and vegetables.

【0022】

Further, in the invention according to claim 2, in addition to the effect of the invention according to claim 1, by applying a deodorizing coat containing a photocatalyst on the glass surface of a light that emits ultraviolet rays, the photocatalyst of the deodorizing coat becomes ultraviolet rays at the time of lighting. Is efficiently received and excited, so that the odorous component passing near the lamp can be efficiently oxidatively decomposed at room temperature or deodorized. Further, during lighting deodorization, oxidative decomposition is promoted by the heat generated by the light itself and the heat generated by the deodorizing coat due to the absorption of ultraviolet rays, and the adsorbed water is also desorbed. Therefore, the deodorizing performance is maintained even in a humid atmosphere, and the deodorizing element becomes maintenance-free.

【0023】

In addition to the effect of the invention according to claim 1, the invention according to claim 3 is coated with a deodorizing coat containing a photocatalyst and an adsorbent on the glass surface of a light that emits ultraviolet rays. The adsorbent adsorbs the odorous components in the vicinity of the deodorizing coat to deodorize it, and when it lights up occasionally, the photocatalyst of the deodorizing coat is excited by efficiently receiving ultraviolet rays, so the adsorbed components are oxidatively decomposed and desorbed at room temperature or at room temperature. , Played efficiently. Further, during lighting reproduction, oxidative decomposition is promoted by the heat generated by the light itself and the heat generated by the deodorizing coat due to the absorption of ultraviolet rays, and the adsorbed water is also desorbed. Therefore, the deodorizing performance is maintained even in a humid atmosphere, and the deodorizing element becomes maintenance-free. In addition, since the lighting only needs to be performed during playback, the life of the light is greatly extended.

【0024】

Further, since the invention according to claim 4 uses titanium oxide as a photocatalyst and activated carbon or H-ZSM5 as an adsorbent or a synthetic zeolite obtained by ion-exchanged the same, in addition to the effects of the invention according to claim 2 or 3. It is possible to provide a deodorizing element having excellent adsorption performance, being less susceptible to the influence of humidity, having excellent toxicity resistance to sulfur, and having a high bactericidal effect.

[Simple explanation of drawings]

[Figure 1]

It is a schematic block diagram which shows one Example of the deodorizing element of this invention.

[Figure 2]

It is sectional drawing of the main part which shows one Example of the deodorizing element of this invention.

[Fig. 3]

It is an enlarged sectional view of a main part of FIG.

[Fig. 4]

It is a comparative explanatory diagram of acetaldehyde purification performance in a dry state in a closed container of various adsorbent powders.

[Fig. 5]

It is a comparative explanatory diagram of acetaldehyde purification performance in a high humidity state in a closed container of various adsorbent powders.

[Fig. 6]

It is a comparative explanatory diagram of methyl mercaptan purification performance in a dry state in a closed container of various adsorbent powders.

[Fig. 7]

It is explanatory drawing of the deodorizing performance in the closed container of one Example of the deodorizing element of this invention.

[Explanation of symbols]

1 light 2 Deodorizing coat 3 Glow starter 4 ballast 5 Photocatalyst 6 Adsorbent 7 Inorganic binder