JPH1147241A - Sterilization apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a handy designing by housing a sterilizing agent having an isothiocyanate based compound packed with cyclodextrine and an adsorbent adapted to adsorb the isothiocyanate volatilized from the sterilize into a container to allow accurately sterilize even in a smaller space. SOLUTION: A sterilizer box 1 has a container 4 made up of the body 2 of a container and a bottom plate 3. The sterilizer box 1 houses into a container 4 a sterilizing agent 5 formed by packing an isothiocyanate based compound with cyclodextrine and an adsorbent 6 adapted to adsorb the isothiocyanate based compound volatilized from the sterilizing agent 5. As a result, the isothiocyanate based compound is volatilized outside the container 4, for example, by arranging the container 4 under a higher humidity or by addition of water thereto to prevent the breeding mildews and bacteria and develop antibacterial action thereby accomplishing the removal of germs in a space where the container 4 is placed. The adsorption of the volatile component by the adsorbent 6 also makes the surrounding space odorless.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disinfecting apparatus and a disinfecting method suitable for exerting a disinfecting action in, for example, a refrigerator or a clog box, and more particularly, to a disinfecting component for isothiocyanate compounds. The present invention relates to a disinfecting device and a disinfecting method used as the device.

[0002]

2. Description of the Related Art Isothiocyanate compounds, which are the main components of wasabi, are known to have an excellent bactericidal action, and various germicidal methods using this isothiocyanate compound have been proposed.

[0003] For example, Japanese Patent Application Laid-Open No. 3-153607 proposes a method using an isothiocyanate ester vapor, which is a main component of wasabi, as a fumigation method for suppressing the growth and propagation of harmful microorganisms and pests in cereals and the like. Have been.

[0004] That is, the method described in the above prior art discloses a method of fumigation by bringing a gas containing isothiocyanate ester vapor, which is a main component of wasabi oil, into contact with a substance to be fumigated. In addition, as a device for performing such a fumigation method, a gas containing isothiocyanate ester vapor is introduced into the fumigation chamber using a vapor generation chamber of isothiocyanate and a blower, and fumigation is performed. Is disclosed which adsorbs and removes the isothiocyanate ester vapor contained in the gas.

In the method described in the above-mentioned prior art, in order to generate isothiocyanate vapor, the isothiocyanate is prepared in a liquid, solution, gel or impregnated state with an adsorbent, and is supplied to a vapor generation chamber. Are located.

However, when the isothiocyanate is made into a solution, the isothiocyanate volatilizes constantly, and it is difficult to maintain the effect until use.

On the other hand, if the isothiocyanate is adsorbed on an adsorbent such as activated carbon, the volatilization of the isothiocyanate vapor before use can be suppressed. However, since the isothiocyanate is adsorbed on the adsorbent, a large-scale apparatus for desorbing the isothiocyanate is necessary to generate isothiocyanate vapor when used. For this reason, the device described in the above prior art cannot be used for disinfecting bacteria in a narrow space in a home such as a refrigerator or a clog box.

An object of the present invention is to provide a simple disinfecting apparatus and disinfecting apparatus which can reliably remove bacteria using an isothiocyanate compound even in a narrow space such as a refrigerator or a clog box at home. It is to provide a method.

[0009]

According to the first aspect of the present invention, there is provided a disinfectant comprising a cyclodextrin containing an isothiocyanate compound in a container, and an isothiocyanate compound volatilized from the disinfectant. And an adsorbent capable of adsorbing the water.

[0010] Further, according to the invention of claim 2, the isothiocyanate compound is volatilized by applying humidity or water to a disinfectant obtained by enclosing the isothiocyanate compound in cyclodextrin, thereby removing bacteria. Along with
This is a disinfection method characterized in that a generated volatile component of the isothiocyanate compound is adsorbed by an adsorbent.

Hereinafter, the present invention will be described in detail. Claim 1
In the invention described in (1), the disinfectant is an inclusion product obtained by including an isothiocyanate compound in cyclodextrin. As the isothiocyanate compound, wasabi oil extracted from natural wasabi can be used as it is, or a compound appropriately separated from the wasabi oil can be used.

As the above isothiocyanate compounds, more specifically, allyl isothiocyanate, isoamyl isothiocyanate, isobutyl isothiocyanate,
Isopropyl thiocyanate, ethyl thiocyanate, nitrophenyl thiocyanate, phenyl thiocyanate, butyl thiocyanate, propyl thiocyanate, benzyl thiocyanate, methyl thiocyanate and the like are preferably used. Allyl acid is preferably used.

The above-mentioned isothiocyanate compound is unstable as it is, and may be decomposed by light, heat, air, water, etc., and lose the bactericidal effect. Therefore, in the present invention, the above isothiocyanate compound or an extract from a natural plant containing the isothiocyanate compound is included in cyclodextrin. The form of the clathrate is not particularly limited, but is usually in the form of granules or pellets.

The amount of the isothiocyanate compound in the clathrate is not particularly limited, but usually, the isothiocyanate compound can be included up to 8% by weight of the total weight of the clathrate.

The clathrate is odorless, but the isothiocyanate compound that has been clathrated volatilizes when exposed to high humidity or when water or hot water is added, causing the odor to evaporate. The obtained isothiocyanate compounds exhibit an excellent bactericidal effect.

However, if the isothiocyanate compound is volatilized and sterilized, and then left as it is, the concentration gradually decreases and the eradication effect is not exhibited. The smell of is attached. Therefore, in the present invention, an adsorbent capable of adsorbing the isothiocyanate compounds volatilized from the disinfectant is contained in the container in addition to the disinfectant.

As the adsorbent, an appropriate adsorbent can be used as long as it can adsorb the isothiocyanate compound. As such an adsorbent, for example, activated carbon, silica, zeolite and the like can be used.

It is desirable that the adsorption capacity of the adsorbent is excessive with respect to the amount of the isothiocyanate compound volatilized. For example, in a home refrigerator, it is highly necessary to deodorize in a short time. Therefore, by making the adsorption capacity of the adsorbent excessive, it is possible to disinfect the refrigerator and immediately deodorize the refrigerator.

For example, if the step of volatilizing and adsorbing the isothiocyanate compound can be completed in about 5 hours in total, the sterilizer according to the present invention can be set in a refrigerator at night before going to bed. In the following morning, the odor of the volatile matter of the isothiocyanate compound will not remain in the refrigerator in the next morning, and an excellent sterilization effect can be obtained while preventing the odor from adhering to food and the like.

The configuration for accommodating the disinfectant and the adsorbent in the container is not particularly limited, either.
You may store it in a container as it is. Most preferably, the disinfectant and the adsorbent are stored in a porous or net-like bag capable of freely passing the gas of the isothiocyanate compound, respectively. It is preferable because the removal is easy. However, instead of the bag, the disinfectant and the adsorbent may be respectively stored in a vessel having a large number of holes smaller than the disinfectant and the adsorbent particles.

Further, the container for storing the disinfectant and the adsorbent can be made of a suitable material such as synthetic resin or glass, and the material is not particularly limited. Also, the shape of the container in which the disinfectant and the adsorbent are stored is not particularly limited as long as the isothiocyanate compound can be volatilized around and the volatilized isothiocyanate compound can be adsorbed. Not something.

A specific example of the structure of the sterilizer according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an appearance of a sterilizer according to the present invention, and FIG. 2 is a longitudinal sectional view thereof. The sterilizer 1 has a container 4 composed of a container body 2 and a bottom plate 3.

A recess 2b is formed in the top plate 2a of the container body 2, and a through hole 2c is formed in the center of the recess 2b. Water can be easily dropped into the container 4 from the through-hole 2c. On the other hand, the lower side of the container body 2 is opened, and the bottom plate 3 is fitted in the opening. The container body 2 has a partition wall 2d formed therein. The partition wall 2d is provided for separating the disinfectant 5 and the adsorbent 6 therein, and the partition wall 2d is provided from the back surface of the top plate 2a.
Is extended to the lower end. That is, the upper surface of the bottom plate 3 is in contact with the lower end of the partition wall 2d.

On the other hand, a disinfectant support container 7 is arranged in one space beside the partition wall 2d. This support container 7
It is made of synthetic resin and is open at the top. The disinfectant 5 is disposed in the support container 7.

As shown in FIG. 3, the disinfectant 5 is in the form of particles and stored in a disinfectant storage bag 5a. The disinfectant storage bag 5a is made of an appropriate synthetic resin film that can transmit an isothiocyanate compound gas.
Therefore, the disinfectant 5 does not scatter outside from the disinfectant storage bag 5a.

On the other hand, an adsorbent 6 is arranged in the other space beside the partition wall 2d. In the present structural example, the adsorbent 6 is stored in the adsorbent storage bag 6a. The adsorbent storage bag 6a is made of a synthetic resin film that allows the isothiocyanate compound gas to freely permeate similarly to the disinfectant storage bag 5a. Since the adsorbent 6 is made of activated carbon and is stored in the adsorbent storage bag 6a, the adsorbent 6 does not scatter outside from the adsorbent storage bag 6a.

The top plate 2a and the side wall 2 of the container body 2
In e, a large number of through holes 2f are formed. Through hole 2
f is formed to volatilize the isothiocyanate compound gas out of the container 4 and guide the gas into the container 4 to be adsorbed by the adsorbent 6. Therefore, the planar shape and the number of the through holes 2f are not particularly limited, either, and are arbitrary.

In the method of removing bacteria according to the second aspect of the present invention, the isothiocyanate compound is volatilized by applying humidity or water to the disinfectant obtained by enclosing the isothiocyanate compound in cyclodextrin. This kills bacteria and mold, and suppresses their growth. That is, it exerts a disinfecting action. At the same time as this disinfection, the generated volatile components of the isothiocyanate compound are adsorbed by the adsorbent, thereby preventing odor from adhering to surrounding foods and the like.

The conditions under which the disinfectant is placed under high humidity and the conditions under which water is added are not particularly limited as long as the isothiocyanate compounds can be volatilized. Further, the water may be cold water or hot water.

(Action) In the sterilizer according to the first aspect of the present invention, a disinfectant comprising a cyclodextrin containing an isothiocyanate compound in a container; and an isothiocyanate volatilized from the disinfectant. Since an adsorbent capable of adsorbing the compound is stored, for example, by placing the container under high humidity or by adding water, the isothiocyanate compound volatilizes from the disinfectant to the outside of the container, It exhibits the growth and antibacterial action of mold and bacteria, and can remove bacteria in the space where the container is arranged. Further, since the volatile component of the volatilized isothiocyanate compound is adsorbed by the adsorbent, the surrounding space can be deodorized.

In the second aspect of the present invention, similarly to the first aspect of the present invention, the isothiocyanate compound is volatilized by placing the disinfectant under high humidity or by adding water. Then, a disinfecting action is exhibited, and the volatile components of the generated isothiocyanate compounds are adsorbed by the adsorbent, and not only can the disinfecting action be effectively performed, but also the surrounding space can be deodorized, Adhesion of odor to foods and the like can be prevented.

[0032]

EXAMPLES The present invention will be clarified by describing specific examples of the present invention.

(Evaluation Method of Examples and Comparative Examples) The gas volatilization concentration, smell transfer to food, and sterilization performance were evaluated using the 20-L polypropylene container in the following manner using the sterilizers of Examples and Comparative Examples. went.

Gas volatilization concentration: The gas concentration of the isothiocyanate compound in a 20-liter polypropylene container was measured 3 hours and 7 hours after the disinfectant was allowed to stand, and gas detection for methyl methacrylate, manufactured by Gastech Co., Ltd. The measurement was performed using a tube.

Smell transfer to food: Placing square butter (20 × 20 × 10 mm) in a petri dish with a diameter of 88 mm, placing it immediately beside the disinfectant in a 20 L polypropylene container, and after 7 hours, smelling butter Was subjected to a sensory evaluation to evaluate the presence or absence of odor transfer of the isothiocyanate compound gas to the butter.

Bactericidal performance: HI is applied to a petri dish with a diameter of 88 mm.
About 20 g of an agar medium was charged and dried for 20 minutes. Next, Escherichia coli E-coli was added to the agar medium as a liquid bacterial solution (1
(000 cfu / ml) 200 μm was evenly applied to prepare an E. coli medium.

The volatilization of the disinfectant was started in the same manner as in the case of measuring the gas volatilization concentration in the 20-L polypropylene container, and the E. coli medium was allowed to stand in the container. After a while
After sealing the polypropylene container and leaving it for 5 hours, take out the above petri dish from the polypropylene container, cover the petri dish, and transfer the petri dish to a constant temperature layer at 30 ° C.
Cultured for hours. Next, the number of colonies of Escherichia coli in the petri dish was measured.

(Example 1) As a disinfectant obtained by including an isothiocyanate compound in cyclodextrin,
4 g of α-cyclodextrin wasabi oil clathrate was prepared and stored in a three-side seal bag made of a nonwoven fabric having a thickness of 40 μm and 50 × 70 mm. The bag containing the above disinfectant was placed in a glass Petri dish having a diameter of 88 mm.
g was added to evaporate the isothiocyanate compound. Immediately after adding the water, it was left still in a 20 L polypropylene container. In addition, 12 g of coconut shell activated carbon is 4
An adsorbent bag was placed in a three-side sealed bag made of a nonwoven fabric of 0 μm and 100 × 70 mm, and the polypropylene container was sealed by standing on the side of the sterilizing agent storage bag in the 20-L polypropylene container.

Example 2 Container 1 shown in FIGS. 1 and 2
Was prepared. The container 1 is made of polypropylene and has a width 1
It has dimensions of 60 x 60 x 100 mm. In this container 1, the disinfectant storage bag and the adsorbent storage bag prepared in Example 1 were arranged, 6 g of tap water was added through the through-hole 2c, and immediately in the 20-L polypropylene container used in Example 1. It was allowed to stand and the polypropylene container was sealed.

Comparative Example 1 The procedure was the same as in Example 1 except that the adsorbent bag containing the adsorbent was not set in the polypropylene container.

Comparative Example 2 Example 2 was the same as Example 2, except that the adsorbent storage bag was not set in the container 1.

(Comparative Example 3) Only the E. coli medium described above was set in the 20-L polypropylene container used in Example 1 without using both the disinfectant and the adsorbent.

The evaluation results are shown in Table 1 below.

[0044]

[Table 1]

As is clear from Table 1, in Comparative Example 3 as a control, 189 cfu was evaluated in the evaluation of the sterilization performance.
However, in Examples 1 and 2 and Comparative Examples 1 and 2, Escherichia coli did not remain due to the effect of the disinfectant.

In Comparative Examples 1 and 2, no odor was transferred to the butter because no adsorbent was used, whereas in Examples 1 and 2, the volatile components of the isothiocyanate compound were reduced by the adsorbent. Perhaps because of adsorption, no odor transfer occurred. This means that the gas concentration of the isothiocyanate compound was 5 ppm after 7 hours in Examples 1 and 2.
Alternatively, it is supported by the fact that it is considerably reduced to 8 ppm.

[0047]

According to the first aspect of the present invention, since the disinfectant obtained by enclosing the isothiocyanate compound in cyclodextrin is contained in the container, the container can be placed under high humidity, By adding water to the disinfectant,
The isothiocyanate compounds are volatilized, and the growth of surrounding bacteria and fungi can be reliably suppressed, and an excellent eradication effect can be obtained. In addition, since the volatile components of the volatilized isothiocyanate compounds are adsorbed by the adsorbent, the smell can be prevented from being transferred to the surrounding foods and the like.

Therefore, the sterilizer according to the present invention can be suitably used in a narrow space such as a refrigerator or a clog box at home. In addition, since the isothiocyanate compound is only included in the cyclodextrin, the isothiocyanate compound gas is volatilized only by disposing a disinfectant under high humidity or by adding water or hot water. Therefore, no large-scale equipment is required.

According to the second aspect of the present invention, the isothiocyanate compound can be prepared by placing a disinfectant obtained by enclosing the isothiocyanate compound in cyclodextrin at a high humidity or by adding water. It is volatilized and can suppress the growth of fungi and mold, and can obtain an excellent eradication effect. In addition, the volatile components of the generated isothiocyanate compounds are adsorbed by the adsorbent, so it can be used in surrounding food, etc. Can prevent the smell transfer of
In addition, the surrounding space can be reliably and easily deodorized.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining a sterilizer according to the present invention.

FIG. 2 is a longitudinal sectional view of the sterilizer shown in FIG.

FIGS. 3 (a) and (b) are a front view and a side sectional view, respectively, showing a disinfectant storage bag in which a disinfectant is stored.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sanitizer 4 ... Container 5 ... Sanitizer 5a ... Sanitizer storage bag 6 ... Adsorbent 6a ... Adsorbent storage bag

Claims (2)

[Claims] 1. A container in which a disinfectant obtained by including an isothiocyanate compound in cyclodextrin and an adsorbent capable of adsorbing the isothiocyanate compound volatilized from the disinfectant are contained in a container. A sterilizer characterized by the following. 2. A method for disinfecting a disinfectant obtained by enclosing an isothiocyanate compound in cyclodextrin by applying humidity or water to volatilize the isothiocyanate compound and sterilize the resulting isothiocyanate compound. A bacteria elimination method characterized in that volatile matter is adsorbed by an adsorbent.