JP4472366B2 - Deodorizing device - Google Patents

Description

The present invention relates to a deodorizing apparatus comprising a deodorant composition obtained by dispersing an adsorbent in the gel was contained in a container, in particular, has high deodorizing performance relates deodorizing device capable of withstanding long-term use is there.

Conventionally, many deodorizers and deodorizers have been proposed to remove odors generated in refrigerators, toilets, indoors, cars, and the like.
Among these, as a deodorizing agent, an adsorbent made of powdered or granular materials having adsorption performance such as charcoal or zeolite is accommodated in a bag having air permeability and the odor is adsorbed by the adsorbent. The type of removal is generally known.

  By the way, although such a deodorizer has a required deodorization performance, since the life of the deodorizer, that is, the end time of the adsorption performance of the adsorbent is not known, the replacement time of the deodorizer is delayed and is not effective as a deodorizer. There was a problem that it was used in a state, or the replacement time was too early and it was discarded in a state where it was effective as a deodorant.

As a solution to such a problem, a deodorant composed of a deodorant composition in which an adsorbent is dispersed in a gel has been proposed (see, for example, Patent Document 1).
Since this type of deodorant can know the life of the deodorant from the remaining amount of the deodorant composition, there is an advantage that the deodorant can be replaced at an appropriate time, but it is dispersed in the deodorant composition. Since the amount of adsorbent that can be used is limited, it has been difficult to improve the deodorizing performance.
JP 2001-157706 A

The present invention provides a deodorizing apparatus that has high deodorizing performance and can withstand long-term use in view of the problems of a deodorizing agent comprising a deodorizing composition obtained by dispersing the above conventional adsorbent in a gel. The purpose is to do.

In order to achieve the above object, the deodorizing apparatus of the present invention contains a deodorant composition obtained by dispersing an adsorbent in a gel in a container, and has a large number of through holes through which air naturally flows through the upper opening of the container. In the deodorizing device covered with the formed lid, a porous material having air permeability to which the photocatalytic semiconductor is fixed is inserted into the lid in a compressed state, and is held by the lid by the expansion force. It is characterized by being arranged.

  In this case, gellan gum can be used for the gelling agent of the deodorant composition, and an organic acid can be added to make the pH of the deodorant composition 2-6.

According to the deodorizing apparatus of the present invention, the adsorbent dispersed in the gel-like deodorant composition is adsorbed and removed, and disposed in the air circulation part of the container containing the deodorant composition. The porous material with air permeability that fixes the photocatalytic semiconductor can decompose and remove odors, has high deodorizing performance, extends the effective period of the deodorizing device , and reduces the adsorption performance of the adsorbent The odor can be decomposed and removed by the odor decomposition function of the porous material having air permeability to which the photocatalytic semiconductor is fixed.
In particular, this deodorizing apparatus can improve the decomposing performance of the odor of the photocatalytic semiconductor fixed to the porous material by the moisture evaporated from the deodorant composition, and can reliably and efficiently decompose and remove the odor.
Thereby, it is possible to provide a deodorizing apparatus that can withstand long-term use at a relatively low cost.

  In addition, gellan gum is used as the gelling agent of the deodorant composition, and the organic acid is added to adjust the pH of the deodorant composition to 2 to 6, thereby reducing the gel strength of the deodorant composition and causing water separation. In addition, it can neutralize the odor of alkali and improve the odor decomposition performance, and the germs grow on the deodorant composition, the mold grows, and the gel is destroyed by the action of the germs and mold. , Problems such as the occurrence of water separation and impaired product performance can be solved.

Hereinafter, embodiments of a deodorizing apparatus of the present invention will be described with reference to the drawings.

In FIG. 1, one Example of the deodorizing apparatus of this invention is shown.
Lid The deodorizing apparatus, constituting the deodorizing apparatus formed by housing a deodorant composition 2 obtained by dispersing the adsorbent in the gel in the container 1, the air circulation unit of the container 1 containing the deodorant composition 2 A porous material 3 having air permeability to which a photocatalytic semiconductor is fixed is disposed in the portion 11.
In this case, a large number of through holes 11a, 11b, and 11c are formed in the lid portion 11 so as not to hinder the air flow.
Further, the porous material 3 is inserted into the lid portion 11 in a slightly compressed state so that the porous material 3 is held at a predetermined position in the lid portion 11 by the expansion force.
Further, the porous material 3 is not completely filled in the lid portion 11 so that the air flow is not hindered, but a slight gap 12 is formed between the porous material 3 and the inner peripheral surface of the lid portion 11. To.

  The deodorant composition 2 is not particularly limited, but a powdery adsorbent, gelling agent, and the like are dispersed with a dispersant, and then water is added thereto, followed by heating and stirring. Thus, the solution can be made into a uniform solution, and finally the solution is poured into the container 1 and cooled.

As the adsorbent, there can be used activated carbon, charcoal such as Bincho charcoal, bamboo charcoal, zeolite, silica gel, composite adsorbent and the like that have been widely used as adsorbents. Among these, it is preferable to use charcoal from the viewpoint of price and deodorizing performance.
The adsorbent is added in an amount of 0.5 to 20 g, preferably 1 to 10 g, and more preferably about 2 to 5 g with respect to 100 g of water as a solvent.

As the gelling agent, gellan gum, carrageenan, agar, gelatin, guar gum, pectin, locust bean gum, xanthan gum, sodium alginate, cellulose derivatives and the like can be used, but the deodorant composition has a pH of 2-6. In this case, it is preferable that the deodorant composition 2 is gellan gum which does not cause a decrease in gel strength and water separation.
In addition, although the addition amount of a gelatinizer can be suitably set according to the target gel strength, it is 0.5-20g with respect to 100g of water which is a solvent, Preferably, it is 1-10g, More preferably Add about 2-5 g.

As the dispersant, glycols such as propylene glycol and ethylene glycol, alcohols such as ethanol and propanol, and the like can be used.
In addition, although the addition amount of a dispersing agent can be suitably set according to the quantity etc. of the adsorbent to add, 1-30 g with respect to 100 g of water which is a solvent, Preferably, it is 5-20 g, More preferably Add about 10-15 g.

Deodorant composition 2 includes organic acids such as citric acid and sodium citrate, and monovalent and divalent metal salts such as sodium, potassium, calcium and magnesium (alkali metal salts such as sodium chloride and potassium chloride). Alkaline earth metal salts such as calcium chloride and magnesium chloride).
Among these, the organic acid is for adjusting the pH value of the deodorant composition 2, and the gelling gum is added to the gelling agent by adding the organic acid to adjust the pH of the deodorant composition 2 to 2-6. The deodorant composition 2 can improve the odor decomposition performance by neutralizing the odor composed of alkali without reducing the gel strength and causing water separation in combination with the use of the deodorant composition. It is possible to solve the problems such as the propagation of germs on the product 2, the growth of fungi, the destruction of the gel due to the action of the germs and fungi, the occurrence of water separation and the loss of product performance.
In addition, although the addition amount of organic acid can be suitably set according to the pH value of the target deodorant composition 2, the pH value of the deodorizer composition 2 is pH 2-6, Preferably, pH 3- 5. More preferably, it is added so that the pH is about 3.5.
The monovalent and divalent metal salts are for improving the gel strength. By adding the monovalent and divalent metal salts, the deodorant composition 2 causes a decrease in gel strength and water separation. This can be prevented.
The addition amount of the divalent metal salt can be appropriately set according to the gel strength of the target deodorant composition 2, but is preferably 0.01 to 10 g, preferably 100 g to 100 g of water as a solvent. Is added in an amount of about 0.1 to 5 g, more preferably about 0.5 to 3 g.

  Further, in the deodorant composition 2, additives other than those described above for various purposes, such as antibacterial / antifungal agents, antiseptics, etc., as long as they do not affect the gel formation of the deodorant composition 2, etc. Deodorant components such as agents, ultraviolet absorbers, pigments, fragrances, plant extracts and the like can be added.

  Moreover, the porous material 3 having air permeability to which the photocatalytic semiconductor is fixed is not particularly limited, and for example, an open cell foam having air permeability made of synthetic resin such as polyurethane and polyethylene can be used. .

The photocatalytic semiconductor fixed to the open-cell foam having air permeability is excited under specific conditions such as light irradiation (particularly even under relatively weak light) to cause oxidation and reduction action. Decompose toxic substances and use substances that exert deodorant, antibacterial, fungicidal and other effects.
As such a photocatalytic semiconductor, in addition to a composite oxide composed of titanium and silicon, TiO ₂ , ZnO, SrTiO ₃ , CdS, CdO, CaP, InP, In ₂ O ₃ , CaAs, BaTiO ₃ , K ₂ NbO ₃ , At least selected from Fe ₂ O ₃ , Ta ₂ O ₅ , WO ₃ , SbO ₂ , Bi ₂ O ₃ , NiO, Cu ₂ O, SiC, SiO ₂ , MoS ₂ , MoS ₃ , InPb, RuO ₂ and CeO ₂ One can be used.
These photocatalytic semiconductors can be used alone or in combination of two or more.
In particular, a titanium oxide compound having a high photocatalytic action, chemically stable and harmless is more preferably used. The titanium oxide-based compound includes, in addition to so-called titanium oxide, hydrous titanium oxide hydrated titanium oxide, titanium hydroxide, metatitanic acid, orthotitanic acid, and the like. Among these, a titanium oxide compound having an anatase crystal form is preferable because it exhibits excellent photocatalytic activity.

And it is preferable to fix the said photocatalytic semiconductor in the form isolated from the organic substance containing the hydrocarbon component which comprises the open-cell foam which has the air permeability which comprises the porous material 3. FIG.
Here, “isolation” means a state in which the photocatalytic semiconductor is not in direct contact with an organic substance containing a hydrocarbon-based component constituting the porous material 3, and therefore does not include a hydrocarbon-based component? Or a resin containing a very small amount, for example, a photocatalytic semiconductor partially coated with at least one resin selected from silicone-based and fluorine-based resins, or coated with an inorganic material having little or no photocatalytic activity The photocatalytic semiconductor is fixed to the porous material 3 by adopting a means such as a microencapsulated one.

The photocatalytic semiconductor is, for example, 0.01 to 20% by weight, preferably 0.05 to 10% by weight, and more preferably 0.00% to the open-cell foam having air permeability constituting the porous material 3. Fix in the range of 01 to 5% by weight.
In this case, when the amount of the photocatalytic semiconductor is 0.01% or less, it is difficult to obtain the effect of the photocatalytic semiconductor. When the amount of the photocatalytic semiconductor is 5% or more, the effect of the photocatalytic semiconductor is obtained. Stable fixing is difficult and the cost is high.

  As a method for fixing the photocatalytic semiconductor to the open cell foam having air permeability constituting the porous material 3, a method of kneading the raw material of the open cell foam or coating the surface of the open cell foam is used. It can be used suitably.

According to this deodorization apparatus , as is clear from the results of the comparison test shown in Table 1, the deodorization is performed together with the adsorption and removal of odors by the adsorbent dispersed in the gel-like deodorant composition 2. Odor can be decomposed and removed by the porous material 3 having air permeability, which is fixed in the air circulation part of the container 1 containing the agent composition 2, and has high deodorization performance and deodorization. Even when the effective period of the apparatus is extended and the adsorption performance of the adsorbent is lowered, the odor can be decomposed and removed by the odor decomposition function of the porous material 3 having air permeability to which the photocatalytic semiconductor is fixed.
In particular, this deodorization apparatus can improve the decomposition performance of the odor of the photocatalytic semiconductor fixed to the porous material 3 by the moisture evaporated from the deodorant composition, and can decompose and remove the odor reliably and efficiently. .

  In addition, gellan gum is used as the gelling agent of the deodorant composition 2, and an organic acid is added to adjust the pH of the deodorant composition to 2 to 6, thereby reducing the gel strength of the deodorant composition 2 and water separation. It can neutralize the odor of alkali and improve the odor decomposition performance without causing it, and the germs grow on the deodorant composition 2 and the mold grows. Can be solved, and the problems such as the occurrence of water separation and the loss of product performance can be solved.

As mentioned above, although the deodorizing apparatus of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, The structure is changed suitably in the range which does not deviate from the meaning. It is something that can be done.

The deodorizing apparatus of the present invention has high deodorizing performance and has characteristics that can withstand long-term use. Therefore, the deodorizing apparatus is preferably used for removing odors generated in refrigerators, toilets, indoors, cars, etc. be able to.

One Example of the deodorizing apparatus of this invention is shown, (a) is a top view, (b) is a front view.

DESCRIPTION OF SYMBOLS 1 Container 11 Cover part 2 Deodorant composition 3 Porous material

Claims (2)

A photocatalytic semiconductor in a deodorizing apparatus in which a deodorant composition in which an adsorbent is dispersed in a gel is housed in a container, and the upper opening of the container is covered with a cover having a plurality of through holes through which air naturally flows. A deodorizing apparatus , wherein a porous material having air permeability to which is fixed is inserted into the lid portion in a compressed state and is held by the lid portion by its expansion force. The deodorizing apparatus according to claim 1, wherein gellan gum is used as a gelling agent of the deodorant composition, and an organic acid is added to adjust the pH of the deodorant composition to 2-6.

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