JPH07103500A - Bacteria preventive and mildewproofing plate for air conditioner and air conditioner using the same - Google Patents

Abstract

PURPOSE:To provide a bacteria preventive and moldewproofing plate for an air conditioner and the air conditioner which can effectively prevent breeding of microorganism such as bacteria, mildew, etc., mixed in drain water to be drained from the conditioner for a long period and prevent clogging of a drain tube and leakage accident of drain water due to breeding of the microorganism. CONSTITUTION:A bacteria preventive and mildewproofing plate 10 for an air conditioner prevents breeding of microorganism such as bacteria, mildew, etc., mixed in drain water 8 in contact with the water 8 to be drained from the conditioner 6, and has bacteria preventive and mildewproofing agent dispersed in a resin base material and filler for preferably dispersing the agent and smoothly discharging the water 8 of the agent in the base material. The plate 10 is arranged in a drain tray 9 of the conditioner 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial and antifungal plate for an air conditioner and an air conditioner using this plate, and particularly to the growth of microorganisms such as bacteria and fungi mixed in drain water discharged from the air conditioner. The present invention relates to an antibacterial and antifungal plate for an air conditioner and an air conditioner using the plate, which can effectively prevent the above, and can prevent the clogging of the drain pipe and the leakage accident of the drain water due to the growth of the above microorganisms.

[0002]

2. Description of the Related Art Generally, during cooling operation of an air conditioner, the moisture contained in the indoor air is condensed on the surface of the heat exchanger and discharged as drain water. This drain water is temporarily stored in a drain pan arranged below the heat exchanger, and is discharged to the outside of the system by a drain pump and a drain hose connected to the drain pan.

At this time, the humidity around the drain dish increases, and dust contained in the indoor air sucked into the air conditioner easily adheres to the drain dish, and bacteria, mold, etc. contained in the dust. It becomes the environment where the microorganisms of

When the growth of the above-mentioned microorganisms becomes remarkable, there is a high possibility that the drain hose will be clogged and eventually the drain water will leak.

Therefore, in order to prevent the growth and growth of microorganisms such as mold and bacteria, the drain tray is coated with a paint containing an antibacterial and antifungal agent, or the drain tray itself is made to contain an antibacterial and antifungal agent. Means are commonly adopted. Here, the drain dish or the like is formed of a resin material such as ABS resin, acrylic styrene resin, or polystyrene resin, while the antifungal agent is, for example, 2- (4-thiazolylbenzimidazole) or 2-benzimidazole. Examples include methyl carbamate and bis [1-hydroxy-2 (1H) pyridinethionate] zinc. In addition, examples of the antibacterial agent include 2,4,4'trichloro 2'-hydroxydiphenyl ether, 2-sulfanilamide pyrimidine,
1,1'-hexamethylenebis [5- (4chlorophenyl) biguanide] dihydrochloride and the like are used. Each of the above-mentioned various chemicals has relatively high heat resistance, and has the advantage that it can maintain its high drug efficacy without being deteriorated even when molded at a high temperature with a resin material.

[0006]

However, in the method of applying the coating composition containing the antibacterial and antifungal agent, it is necessary to form a coating film uniformly on the surface of the drain dish having a complicated structure by spray coating or manual coating operation. Since it requires a lot of labor, it is not suitable as a coating method for mass-produced products. On the other hand, in the method of kneading the above-mentioned chemicals into the resin material, since the conventional general-purpose resin materials such as ABS resin, acrylic-styrene resin, and polystyrene resin are dense and hard, expensive chemical agents can be used. There is a problem in effectiveness and economical efficiency that a sufficient antibacterial and antifungal effect cannot be exhibited unless it is contained in a large amount of about 6 to 1.0%. Further, since the above-mentioned resin materials all have high molding temperatures, there is a problem that the usable chemicals are limited to extremely narrow and expensive chemicals.

Further, when a conventional antibacterial and antifungal agent containing only a conventional antibacterial and antifungal agent in a resin material is used, the drug is eluted in a short period of time, and the antibacterial and antifungal agent is effective. Could not be maintained for a long time.

The present invention has been made to solve the above problems, and effectively prevents the growth of microorganisms such as bacteria and fungi mixed in drain water discharged from an air conditioner for a long period of time, It is an object of the present invention to provide an antibacterial and antifungal plate for an air conditioner and an air conditioner using the plate, which can prevent clogging of the drain pipe and leakage of drain water due to the growth of the above microorganisms.

[0009]

In order to achieve the above-mentioned object, the inventor of the present invention uniformly disperses the antibacterial and antifungal agent in the resin in addition to the antibacterial and antifungal agent and the resin material which have been conventionally used. Various fillers were mixed with the antibacterial and antifungal agent and the resin material to prepare antibacterial and antifungal plates, and their antifungal and antifungal effects were compared in size and duration.

As a result, when an antibacterial and antifungal plate is prepared by incorporating an industrial antibacterial and antifungal agent and a predetermined amount of filler into a resin base material such as polypropylene and polyethylene,
For the first time, a plate that exhibits stable antibacterial and antifungal effects over a long period of time was obtained. The present invention has been completed based on the above findings.

That is, the antibacterial and antifungal plate for an air conditioner according to the first invention of the present application is in contact with drain water discharged from an air conditioner to prevent the growth of microorganisms such as bacteria and mildew mixed in the drain water. In antibacterial and antifungal plates for air conditioners,
Antibacterial and antifungal agent dispersed in the resin base material, and a filler that facilitates the elution of the antibacterial and antifungal agent into the drain water while improving the dispersion of the antibacterial and antifungal agent to the resin base material. It is characterized by containing.

An air conditioner according to the second invention of the present application is
In an air conditioner equipped with a drain tray for containing drain water discharged from the air conditioner, with an antibacterial and antifungal agent dispersed in a resin base material, and a good dispersion of the antibacterial and antifungal agent. An antibacterial and antifungal plate for an air conditioner, which comprises a resin base material and a filler for facilitating the elution of the antibacterial and antifungal agent into drain water, is arranged in the drain tray.

Among the above-mentioned antibacterial and antifungal agents, the antifungal agent is
It is a drug that suppresses the growth of molds mixed in drain water, and includes, for example, 2- (4-thiazolyl) -benzimidazole (compound A), methyl 2-benzimidazole carbamate (compound B), 2, 4, 5 , 6-Tetrachloroisophthalonitrile (Compound C), 2,3,5,6-Tetrachloro-4- (methylsulfonyl) pyridine (Compound D), N- (Fluorodichloromethylthio) phthaloimide (Compound E), N -Dimethyl-N'-phenyl-
(N'-florodichloromethylthio) sulfamide (Compound F), bis [1-hydroxy-2 (1H) pyridinethionate] zinc (Compound G), diiodomethyl-
P-tolyl sulfone (Compound H), P-chlorometaxylenol (Compound I), 3-iodo-2-propargyl butylcarbamic acid (Compound J) and the like are used.

On the other hand, the antibacterial agent among the antibacterial and antifungal agents is an agent for suppressing the growth of bacteria mixed in the drain water,
For example, 2,4,4 'trichloro 2'hydroxydiphenyl ether (compound K), 2-sulfanilamide pyrimidine (compound L), 1,1'-hexamethylenebis [5- (4chlorophenyl) biguanide] dihydrochloride (compound M) or the like is used.

The antibacterial and antifungal agent used in the present invention is not limited to the above-mentioned agents. The above antibacterial and antifungal agents are used singly or in combination of two or more depending on the kinds of molds and bacteria that coexist in the drain water. The addition ratio of the above-mentioned antibacterial and antifungal agent is 0.2 to the whole plate.
It is set in the range of 2.0%.

As the resin base material, ABS resin, acrylic styrene resin, polyethylene resin, vinyl chloride resin, polypropylene resin or the like is used. However, as shown in the examples described below, in a plate made of acrylic styrene, polystyrene or the like as a resin base material, there is a drawback that the contained agent is difficult to be eluted in the drain water,
In particular, in order to effectively dissolve the antibacterial and antifungal agent in the drain water, it is preferable to use polyethylene resin as the base material. There are two types of polyethylene resin, Roden type (low density type) and Heiden type (high density type).
The Rhoden type is desirable in order to effectively elute the drug over a long period of time.

Further, the filler contained in the resin base material has a function to uniformly disperse the antibacterial and antifungal agent in the resin base material and gradually dissolve the antibacterial and antifungal agent into the drain water over a long period of time. Besides having, it also functions as a stabilizer that prevents thermal decomposition of the resin during molding.

Specific examples of the above fillers include oxide compounds such as aluminum oxide and zinc oxide; hydroxide compounds such as magnesium hydroxide and aluminum hydroxide; carbonates such as calcium carbonate and magnesium carbonate; calcium sulfate, barium sulfate and the like. Sulfates of sodium; silicates such as sodium silicate and calcium silicate are used. These fillers are added in the range of 18 to 40% by weight based on the whole plate.

Further, since each of the above fillers has a large specific gravity, when incorporated into the resin base material, it also has the effect of increasing the specific gravity of the entire plate. Therefore, even when immersed in drain water, there is little risk of floating or moving, and a stable antibacterial and antifungal action can be exhibited at the installation location.

The antibacterial and antifungal plate according to the present invention is obtained, for example, by adding a predetermined amount of a filler and an antibacterial and antifungal agent to the above-mentioned resin base material and uniformly kneading the mixture, and then press-molding the resulting kneaded product. It is then cured and manufactured.

[0021]

The antibacterial and antifungal plate for an air conditioner according to the first aspect of the present invention is excellent because the antibacterial and antifungal agent contained in the resin base material is gradually eluted into the drain water over a long period of time. The antibacterial and antifungal effect lasts for a long time.

Further, according to the air conditioner of the second aspect of the present invention, since the antibacterial and antifungal plate is arranged on the drain plate, the growth of bacteria and mold in the drain water is effectively suppressed, and the long-term It is possible to keep the drain equipment clean over a period of time. Therefore, it is possible to prevent clogging of the drain hose and leakage of drain water due to the growth of microorganisms.

[0023]

EXAMPLES Examples of the present invention will be described below.

Preparation of antibacterial and antifungal plates according to Examples 1 to 9
As shown in manufacturing Table 1, the resin compound was preblended a dispersant, various compounds as Antibacterial and Antifungal Agents A~M
And various fillers are added so as to have a predetermined composition shown in Table 1, and they are mixed uniformly and further at a temperature of 200 to 230.
The resin is sufficiently kneaded in a molten state by heating to ℃, the resulting kneaded body is filled in a molding die and pressure-molded, and the resin is cured to obtain a length of 83 mm × width of 50 mm × thickness of 3.0 mm × Each of the antibacterial and antifungal plates according to each example having a weight of 10 g was prepared.

However, the size of the plate according to the ninth embodiment is 1 vertical.
The size was 25 mm × width 116 mm × thickness 12 mm.

[0026]

[Table 1]

Next, in order to evaluate the antibacterial and antifungal effect of each antibacterial and antifungal plate, the following tests were carried out.

(1) Inhibition circle measurement test for mold (Test method 1) (2) Mold resistance test (Test method 2) (3) Inhibition circle measurement test for bacteria (Test method 3) (4) Water antibacterial test (Test method 4)

The above test methods will be described in detail below.

Inhibition circle measurement test for mold (Test method 1) Penicillium citrin cultured at 27 ° C for 7 days in a slant medium containing potato decoction
um) and Aspergillus nige
From the slant culture medium of r), collect one platinum loop of each strain. Next, the spore suspension prepared by adding the above-mentioned strain to sterile water containing a surfactant and further filtering was added to 45 to 4
0.5 vol% of the cells were inoculated on a potato agar medium cooled to 7 ° C. and mixed uniformly. As shown in FIG. 1, 20 ml of this mixture was aseptically dispensed into a sterile glass petri dish having an inner diameter of 9 cm, and immediately before the agar solidified, a sample piece 2 (25 mm × 25 mm) of the antibacterial and antifungal plate was placed. The plate medium is arranged so as to be embedded in the medium 3 to prepare a plate medium. Then, after culturing this plate medium for 48 hours in an incubator at 27 ± 1 ° C., the diameter D of the inhibition circle 4 showing the region where the growth of microorganisms was inhibited by the antifungal action of the sample (antibacterial antifungal plate) was determined. taking measurement.
In FIG. 1, the shaded area indicates the growth region 5 in which the antifungal effect of the sample does not reach and the microorganisms have grown.

Mold resistance test (Test method 2) IEC [(International Electrotechnical Commissio
n), 68-2-10, Vol. 1984] and prepare a synthetic medium having the composition shown in Table 2 below.

[0032]

[Table 2]

Next, in the above synthetic medium, as a surfactant, sodium dioctyl sulfosuccinate (Dioctyl Sodiu) was added.
m. Sulfosaccinate) is added to the test tube in an amount of 5% by weight, and sterilized. On the other hand, in the same manner as in Test Method 1, one platinum loop amount of each strain was collected from each of Penicillium citrinum and Aspergillus niger slope mediums, and these strains were inoculated into the medium of the above test tube to prepare a spore suspension. . Next, the spore suspension is mixed, and then filtered with double sterile gauze to remove mycelium to prepare a mixed spore fluid. Then, this mixed spore solution was filled in a glass sprayer for chromatography, sprayed on the surface of each sample (antibacterial and antifungal plate), dried at room temperature, and then cultured in an incubator at a humidity of 90% and a temperature of 27 ° C. Then, on the 28th day after the start of the culture, the growth of mycelia grown on the surface of the sample is observed with a stereoscopic microscope and the naked eye.

Here, as an index for judging the antifungal effect of each sample, proliferation values of 0 to 3 were set as follows.

Proliferation value 0: When the mold surface is not observed at all as a result of observing the sample surface with a stereoscopic microscope at a magnification of 50 times.

Proliferation value 1: When the generation of mold on the surface of the sample can hardly be observed with the naked eye, but it is recognized by observation with a stereoscopic microscope.

Proliferation value 2: When the generation of mold on the surface of the sample is clearly recognized with the naked eye, and the ratio of the mold generation region to the sample surface area is less than 25%.

Proliferation value 3: When the generation of mold on the surface of the sample is clearly recognized with the naked eye, and the ratio of the mold generation region to the sample surface area is 25% or more.

Inhibitory circle measurement test for bacteria (Test method 3) Escherichia coli and Staphylococcus aureus (Staphylo) cultured on ordinary agar slant medium at 37 ° C. for 24 hours
A sterilized common broth solution is inoculated with each ears of Coccus aureus 209p) and cultivated at 37 ° C. for 24 hours to prepare a bacterial solution. Next, 1 wt% of the above bacterial solution was inoculated into a normal broth agar medium cooled to 45 to 47 ° C. and uniformly mixed, and 20 ml of the mixed solution was dispensed into a sterilized glass dish having an inner diameter of 9 cm, immediately before the agar solidified. In the same manner as in Test Method 1, the antibacterial and antifungal plate sample pieces (25 mm × 25 mm) are arranged so as to be embedded in the medium to prepare a plate medium. Then, after culturing this plate medium in an incubator at 37 ± 1 ° C. for 24 hours, the diameter of the inhibition circle showing the region where the growth of microorganisms is inhibited by the antibacterial action of the sample (antibacterial and antifungal plate) is measured. . The operation of measuring the inhibition circle is the same as the operation shown in FIG.

Antibacterial and antifungal test of water (Test method 4) The antibacterial and antifungal plate was placed in a beaker having a capacity of 300 ml, 300 ml of pure water was poured, and the plate was allowed to stand for 1 week. The agent is dissolved in pure water to prepare antibacterial and antifungal water. Then, the operation of replacing with fresh water every week is repeated for 8 weeks, and a predetermined amount of antibacterial and antifungal water is sampled for each replacement and absorbed until it is saturated with a paper disk (disc shaped disc paper) with a diameter of 8 mm. To make a sample piece.

Then, in place of the antibacterial and antifungal plate in Test Method 1 and Test Method 3, a test piece (paper disk) containing the above antibacterial and antifungal water is arranged so as to be embedded in the medium, and then Test Method 1 and Test By performing the same treatment as in Method 3, the diameter of the inhibition circle showing the region where the growth of various microorganisms is inhibited by the antibacterial and antifungal water contained in the sample piece is measured.

Hereinafter, Examples carried out to evaluate the antibacterial and antifungal effect of each antibacterial and antifungal plate according to Examples 1 to 9 will be described together with Comparative Examples.

Test Example 1 Polyethylene resin as a resin base material, methyl 2-benzimidazole carbamate (Compound B) as antifungal agent, jodomethyl-P-tolylsulfonic acid (Compound H), 2,4 as fungicides. Tested according to Test Method 1 and Test Method 3 with respect to the antibacterial and antifungal plate according to Example 1 formed by compounding 4'trichloro 2'hydroxydiphenyl ether (Compound K) and calcium carbonate as a filler in the composition shown in Table 1. Was carried out, and the growth limit (diameter of the inhibition circle) of the microorganisms which were inhibited by the antibacterial and antifungal action of the plate was measured. Each test was carried out in triplicate by preparing three identical test bodies for each strain.

On the other hand, a plate having the same size containing no antibacterial agent and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner to obtain the results shown in Table 3 below.

[0045]

[Table 3]

As is clear from the results shown in Table 3, it was found that the antibacterial and antifungal plate according to Example 1 can effectively inhibit the growth and growth of fungi and microorganisms such as bacteria.

Test Example 2 A fungus resistance test was carried out according to Test Method 2 in order to evaluate the antifungal effect of the antibacterial and antifungal plate according to Example 1 using a polyethylene resin as a resin base material. That is, the mixed spore fluid was sprayed on the plate surface, and after culturing for 28 days in an incubator, the growth status of the strain grown on the plate surface was observed with a stereoscopic microscope and the naked eye. The same test was carried out on the plate of Comparative Example containing no antibacterial and antifungal agent, and the results shown in Table 4 below were obtained.

[0048]

[Table 4]

As is clear from the results shown in Table 4, the generation and growth of mold was not observed at all when the surface of the antibacterial and antifungal plate according to Example 1 was observed not only with the naked eye but also with a stereomicroscope, which was excellent. It has been found that it has an antifungal effect.

Test Example 3 In order to evaluate the durability of the antibacterial and antifungal effect of the antibacterial and antifungal plate according to Example 1, the following running water test was carried out. That is, the operation of immersing the antibacterial and antifungal plate prepared in Example 1 in running water having a flow rate of 1.5 liters per minute for washing was continued for one month, and then the antibacterial and antifungal plate washed was tested. The test was carried out according to 1 and Test Method 3, and the growth limit of microorganisms due to the antibacterial and antifungal action of the plate after washing was measured as the diameter of the inhibition circle,
The results shown in Table 5 were obtained.

A mold resistance test was carried out on the washed plate in accordance with Test Method 2, and the proportion of mold which developed and grew on the plate surface was measured as a growth value, and the results shown in Table 6 were obtained.

[0052]

[Table 5]

[0053]

[Table 6]

As is clear from the results shown in Tables 5 and 6, according to the antibacterial and antifungal plate of Example 1, even after washing with a large amount of running water, the growth of microorganisms such as fungi and bacteria is effective. It has been demonstrated that the antibacterial and antifungal effects are stable for a long period of time, and that the excellent effects are sustained.

Test Example 4 It was also tested that the water (for example, drain water) from which the antibacterial and antifungal agent was eluted due to contact with the antibacterial and antifungal plate of Example 1 also has a strong antibacterial and antifungal effect. It was confirmed by a water bactericidal test shown in Method 4.

That is, according to Test Method 4, the plate was immersed in a predetermined amount (300 ml) of pure water and left for one week,
The antibacterial and antifungal agent was dissolved in pure water from the plate to prepare antibacterial and antifungal water. The plate was replaced with pure water soaked every week, and a predetermined amount of antibacterial and antifungal water was sampled each time.
Then, the antibacterial and antifungal waters collected from the first week to the eighth week were absorbed into the respective paper discs until they were saturated to obtain sample pieces.

The diameter of the inhibition circle was measured by treating this sample piece according to Test Method 1 and Test Method 3, and the results shown in Tables 7 to 14 below were obtained.

[0058]

[Table 7]

[0059]

[Table 8]

[0060]

[Table 9]

[0061]

[Table 10]

[0062]

[Table 11]

[0063]

[Table 12]

[0064]

[Table 13]

[0065]

[Table 14]

As is clear from the results shown in Tables 7 to 14, the water itself containing the antibacterial and antifungal agent upon contact with the antibacterial and antifungal plate has a considerably high antibacterial and antifungal effect. It was confirmed that Further, the diameter of the inhibition circle due to the antibacterial and antifungal water in the 8th week tends to be slightly smaller than the diameter of the inhibition circle due to the antibacterial and antifungal water in the first week, but this is not a big difference. Therefore, it was revealed that the antibacterial and antifungal effect is well maintained over a long period of time even when water is replaced.

Test Example 5 Polypropylene resin as a resin base material, 2- as a mildew-proofing agent
Benzimidazole methyl carbamate (Compound B),
Diiodomethyl-P-tolylsulfonic acid (Compound H),
Tests were carried out on the antibacterial and antifungal plate according to Example 2 formed by blending 2,4,4 'trichloro 2'hydroxydiphenyl ether (compound K) as a bactericidal agent and calcium sulfate as a filler in a composition shown in Table 1. The test was carried out according to Method 1 and Test Method 3, and the growth limit (diameter of the inhibition circle) of the microorganisms which were inhibited by the antibacterial and antifungal action of the plate was measured. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate of the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner. The results shown in Table 15 below were obtained.

[0069]

[Table 15]

As is clear from the results shown in Table 15, the antibacterial and antifungal plate according to Example 2 can effectively prevent the growth and proliferation of mold, while it is effective against bacteria. It turns out that we can hardly expect it.

It should be noted that in a plate having a relatively high hardness made of polypropylene resin as a base material, the antibacterial agent is encapsulated in the dense resin base material structure, which makes it difficult to elute into water. Presumed. Therefore, polypropylene is unsuitable as a resin base material for plates used for antibacterial applications.

Test Example 6 Polystyrene resin as a resin base material, methyl 2-benzimidazolecarbamate (Compound B) as a fungicide, diiodomethyl-P-tolylsulfonic acid (Compound H), 2,4,4 as a fungicide A test was performed according to Test Method 1 and Test Method 3 on the antibacterial and fungal plate according to Example 3 formed by blending'trichloro 2'hydroxydiphenyl ether (Compound K) and sodium silicate as a filler in the composition shown in Table 1. It was carried out and the growth limit (diameter of the inhibition circle) of the microorganisms which were inhibited by the antibacterial and antifungal action of the plate was measured. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate of the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner, and the results shown in Table 16 below were obtained.

[0074]

[Table 16]

As is clear from the results shown in Table 16, in the antibacterial and antifungal plate according to Example 3, all the antibacterial and antifungal agents were encapsulated in a highly rigid and dense polystyrene resin structure and contacted with the plate. Since the drug could not be dissolved in the sewage water, it showed little effect on both mold and bacteria. Therefore, it is inappropriate to use polystyrene as the resin base material of the plate.

Test Example 7 Vinyl chloride resin as a resin base, methyl 2-benzimidazole carbamate (Compound B), diiodomethyl-P-tolyl sulfonic acid (Compound H) as a fungicide, and 2,4 as a fungicide. 4'Trichloro 2'hydroxydiphenyl ether (compound K), magnesium hydroxide as a filler having a composition shown in Table 1 was used to form a bactericidal and mildewproof plate according to Example 4 in accordance with Test Method 1 and Test Method 3. The test was carried out to measure the growth limit (diameter of the inhibition circle) of the microorganisms which were inhibited by the antibacterial and antifungal action of the plate. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate of the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner to obtain the results shown in Table 17 below.

[0078]

[Table 17]

As is clear from the results shown in Table 17, the antibacterial and antifungal plate according to Example 4 was found to be able to effectively inhibit the growth and growth of fungi and microorganisms such as bacteria.

Test Example 8 Polyethylene resin as a resin substrate and 2- as a mildew-proofing agent
(4-thiazolyl) -benzimidazole (Compound A), bis [1-hydroxy-2 (1H) pyridinethionate] zinc (Compound G), 1.1'as an antibacterial agent
Hexamethylenebis [5- (4chlorophenyl) biguanide] dihydrochloride (Compound M), zinc oxide as a filler having a composition shown in Table 1 was used to form the antibacterial and antifungal plate according to Example 5, and the test method was used. The test was carried out according to 1 and Test Method 3, and the growth limit of the microorganisms (diameter of the inhibition circle) which was inhibited by the antibacterial and antifungal action of the plate was measured. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate having the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner to obtain the results shown in Table 18 below.

[0082]

[Table 18]

As is clear from the results shown in Table 18, the antibacterial and antifungal plate according to Example 5 was found to be able to effectively inhibit the growth and growth of fungi and microorganisms such as bacteria.

Test Example 9 A mold resistance test was carried out according to Test Method 2 for evaluating the antifungal effect of the antibacterial and antifungal plate according to Example 5 using a polyethylene resin as a resin base material. That is, the mixed spore fluid was sprayed on the plate surface, and after culturing for 28 days in an incubator, the growth status of the strain grown on the plate surface was observed with a stereoscopic microscope and the naked eye. The plate of Comparative Example containing no antibacterial and antifungal agent was similarly tested, and the results shown in Table 19 below were obtained.

[0085]

[Table 19]

As is clear from the results shown in Table 19, no generation or proliferation of mold was observed at all when the surface of the antibacterial and fungicide plate according to Example 5 was observed not only with the naked eye but also with a stereoscopic microscope. It was found that it exhibited a mildew-proofing effect.

Test Example 10 In order to evaluate the durability of the antibacterial and antifungal effect of the antibacterial and antifungal plate according to Example 5, the following running water test was carried out. That is, the operation of immersing the antibacterial and antifungal plate prepared in Example 5 in running water having a flow rate of 1.5 l / min for washing was continued for one month, and then the antibacterial and antifungal plate washed was tested in Test Method 1 And the test was carried out according to Test Method 3, and the growth limit of microorganisms due to the antibacterial and antifungal action of the plate after washing was measured as the diameter of the inhibition circle.
The results shown in are obtained.

Further, the mold resistance test was carried out on the washed plate according to Test Method 2, and the proportion of mold which developed and grew on the plate surface was measured as a growth value.
The results shown in are obtained.

[0089]

[Table 20]

[0090]

[Table 21]

As is clear from the results shown in Tables 20 and 21, according to the antibacterial and antifungal plate of Example 5,
Even after washing with a large amount of running water, it effectively inhibits the growth of microorganisms such as mold and bacteria, exerts a stable antibacterial and antifungal effect for a long period of time, and has an excellent effect persistence. Was demonstrated.

Test Example 11 Polyethylene resin as a resin base material, 2, as a mildew-proofing agent
4,5,6-Tetrachloroisophthalonitrile (compound C), N-dimethyl-N'-phenyl- (N'-florodichloromethylthio) sulfamide (compound F), 2-sulfanilamide pyridine (compound as a fungicide) L), magnesium carbonate as a filler having the composition shown in Table 1 was formed, and the antibacterial and fungal plate according to Example 6 was tested according to Test Method 1 and Test Method 3 to prevent the antibacterial and antifungal plate from The growth limit (diameter of the inhibition circle) of the microorganisms inhibited by the mold action was measured. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate of the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner, and the results shown in Table 22 below were obtained.

[0094]

[Table 22]

As is clear from the results shown in Table 22, the antibacterial and antifungal plate of Example 6 was found to be able to effectively inhibit the growth and growth of microorganisms such as mold and bacteria.

Test Example 12 A mold resistance test was carried out according to Test Method 2 for evaluating the antifungal effect of the antibacterial and antifungal plate according to Example 6 using a polyethylene resin as a resin base material. That is, the mixed spore fluid was sprayed on the plate surface, and after culturing for 28 days in an incubator, the growth status of the strain grown on the plate surface was observed with a stereoscopic microscope and the naked eye. The plate of Comparative Example containing no antibacterial and antifungal agent was also similarly tested, and the results shown in Table 23 below were obtained.

[0097]

[Table 23]

As is clear from the results shown in Table 23, no generation or proliferation of mold was observed at all when the surface of the antibacterial and fungicide plate according to Example 6 was observed not only with the naked eye but also with a stereoscopic microscope, which was excellent. It was found that it exhibited a mildew-proofing effect.

Test Example 13 In order to evaluate the persistence of the antibacterial and antifungal effect of the antibacterial and antifungal plate according to Example 6, the following running water test was carried out. That is, the operation of immersing the antibacterial and antifungal plate prepared in Example 6 in running water having a flow rate of 1.5 l / min for washing was continued for 1 month, and then the antibacterial and antifungal plate washed was tested in Test Method 1 The test was carried out according to Test Method 3 and Test Method 3, and the growth limit of microorganisms due to the antibacterial and antifungal action of the plate after washing was measured as the diameter of the inhibition circle.
The results shown in are obtained.

The plate after washing was subjected to a fungus resistance test in accordance with Test Method 2, and the rate of fungi developing on the plate surface was measured as a growth value.
The results shown in are obtained.

[0101]

[Table 24]

[0102]

[Table 25]

As is clear from the results shown in Tables 24 and 25, according to the antibacterial and antifungal plate of Example 6,
Even after washing with a large amount of running water, it effectively inhibits the growth of microorganisms such as mold and bacteria, exerts a stable antibacterial and antifungal effect for a long period of time, and has an excellent effect persistence. Was demonstrated.

Test Example 14 Low density type (Rhoden type) polyethylene resin (Example 7) as a resin substrate, high density type (Hayden type) polyethylene resin (Example 8), and 2-benzimidazolecarbamic acid as a fungicide. Methyl (compound B), diiodomethyl-P-tolyl sulfonic acid (compound H), 2,4,4 'trichloro 2'hydroxydiphenyl ether (compound K) as a fungicide, and calcium silicate as a filler are shown in Table 1. Regarding the antibacterial and antifungal plate according to Example 7 and Example 8 formed by compounding, Test Method 1
And the test was carried out according to Test Method 3 to measure the growth limit (diameter of the inhibition circle) of the microorganisms which were inhibited by the antibacterial and antifungal action of the plate. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate of the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner, and the results shown in Tables 26 and 27 below were obtained.

[0106]

[Table 26]

[0107]

[Table 27]

As is clear from the results shown in Tables 26 and 27, the antibacterial and antifungal plates according to Examples 7 and 8 can effectively inhibit the growth and growth of fungi and microorganisms such as bacteria. It turned out to be possible.

Even when the types and contents of the antibacterial and antifungal agent and the filler were set to be the same, the plate of Example 7 using low density polyethylene as the resin substrate was higher in high density polyethylene. It was confirmed that a relatively excellent effect was exhibited as compared with Example 8 used.

Test Example 15 Low density polyethylene resin as a resin substrate, methyl 2-benzimidazole carbamate (Compound B), diiodomethyl-P-tolylsulfonic acid (Compound H) as a fungicide, 2, as a bactericide 4,4'trichloro 2'hydroxydiphenyl ether (compound K), calcium silicate as a filler having the composition shown in Table 1 was used to form the antibacterial and fungal plate according to Example 9, and the test method 1 was used.
And the test was carried out according to Test Method 3, and the growth limit of the microorganisms (diameter of the inhibition circle) which was inhibited by the antibacterial and antifungal action of the plate was measured. Each test was carried out in triplicate with three identical test bodies prepared for each strain.

On the other hand, a plate of the same size containing no antibacterial and antifungal agent was prepared as a comparative example, and the diameter of the inhibition circle was measured in the same manner to obtain the results shown in Table 28 below.

[0112]

[Table 28]

As is clear from the results shown in Table 28, it was found that the antibacterial and antifungal plate according to Example 9 can effectively inhibit the growth and growth of microorganisms such as mold and bacteria.

In particular, as compared with the plate of Example 7 having a thickness of 3 mm shown in Table 26, the plate of Example 9 having a thickness of 12 mm has a relatively higher antifungal effect.

Test Example 16 A mold resistance test was carried out in accordance with Test Method 2 for evaluating the antifungal effect of the antibacterial and antifungal plate according to Example 9 using a low density polyethylene resin as a resin base material. That is, the mixed spore fluid was sprayed on the plate surface, and after culturing for 28 days in an incubator, the growth status of the strain grown on the plate surface was observed with a stereoscopic microscope and the naked eye. The same test was carried out on the plate of Comparative Example containing no antibacterial and antifungal agent, and the results shown in Table 29 below were obtained.

[0116]

[Table 29]

As is clear from the results shown in Table 29, no generation or growth of mold was observed at all when the surface of the antibacterial and antifungal plate according to Example 9 was observed not only with the naked eye but also with a stereoscopic microscope, which was excellent. It was found that it exhibited a mildew-proofing effect.

Test Example 17 In order to evaluate the persistence of the antibacterial and antifungal effect of the antibacterial and antifungal plate according to Example 9, the following running water test was carried out. That is, the operation of immersing the antibacterial and antifungal plate prepared in Example 9 in running water having a flow rate of 1.5 l / min for washing was continued for 1 month, and then the antibacterial and antifungal plate washed was tested in Test Method 1 And the test was carried out in accordance with Test Method 3, and the growth limit of microorganisms due to the antibacterial and antifungal action of the plate after washing was measured as the diameter of the inhibition circle.
The results shown in are obtained.

A mold resistance test was carried out on the washed plate in accordance with Test Method 2, and the proportion of mold growing on the plate surface was measured as a growth value.
The results shown in are obtained.

[0120]

[Table 30]

[0121]

[Table 31]

As is clear from the results shown in Tables 30 and 31, the antibacterial and antifungal plate according to Example 9
Even after washing with a large amount of running water, it effectively inhibits the growth of microorganisms such as mold and bacteria, exerts a stable antibacterial and antifungal effect for a long period of time, and has an excellent effect persistence. Was demonstrated.

Next, an embodiment of an air conditioner provided with the antibacterial and antifungal plate according to the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view showing an embodiment of a ceiling-embedded indoor air conditioner 6.

That is, in the air conditioner according to this embodiment, in the air conditioner 6 provided with the drain tray 9 for storing the drain water 8 discharged from the heat exchanger 7 of the air conditioner 6, the resin base material is provided. An air conditioner containing a dispersed antibacterial and antifungal agent, and a filler that makes the disinfection of the antibacterial and antifungal agent into drain water smooth while ensuring good dispersion of the antibacterial and antifungal agent in a resin base material. The antibacterial and antifungal plate 10 is disposed in the drain tray 9 to be configured.

The air conditioner 6 is installed by being embedded in the ceiling 11 in the room. A pair of fans 13 is arranged in the fan casing 12 of the air conditioner 6, and each fan 1
A pair of heat exchangers 7 are arranged so as to face the heat exchangers 3. A drain tray 9 for receiving drain water 8 is integrally attached to the ceiling panel 14 below the heat exchanger 7.

The room air sucked into the air conditioner 6 from the suction port (not shown) attached to the ceiling panel 14 is dehumidified and cooled by the heat exchanger 7 cooled by the refrigerant. The cooled air is recirculated into the room by the fan 13 through the movable louver 15 at the air outlet. The vertical direction of the movable louver 15 appropriately adjusts the blowing direction of the cooling air.

On the other hand, the moisture contained in the room air is condensed on the surface of the heat exchanger 7 and becomes drain water 8 which flows down. The drain water 8 that has flown down is temporarily stored in the drain tray 9, and is further discharged to the outside of the system by a drain pipe and a drain pump (not shown).

However, since the antibacterial and antifungal plate 10 is disposed on the drain tray 9 of the air conditioner 6, the antibacterial and antifungal agent is eluted from the plate 10 into the drain water. Therefore, the growth of microorganisms such as bacteria and mold in the drain water is effectively suppressed. In addition, since the drain water itself from which the antibacterial and antifungal agent is eluted also exerts a strong antibacterial and antifungal action, it is possible to keep the entire drain piping system such as the drain piping and the drain pump through which the drain water flows clean. It is possible to eliminate the clogging of the drain hose due to the proliferation of the water and the leakage accident caused by the clogging.

The antibacterial and antifungal plate according to the present invention was originally developed especially for the purpose of inhibiting the growth of microorganisms generated in an air conditioner. It is not limited to machines. For example, it has been confirmed that an excellent antibacterial and antifungal effect is exhibited even when it is installed in a piping system of various plant equipment, an installation pit of equipment that generates drain water, or the like. Furthermore, for household use, slats for bathrooms used in hot and humid conditions, mats, bathtub lids, shower curtains,
By using the antibacterial and antifungal plate of the present invention as at least a part of the material constituting the rack and bathroom wall of the bathroom, it is possible to effectively prevent the occurrence of mildew and the like for a long period of time.

Further, since the antibacterial and antifungal plate according to the present invention is small and formed in a thin plate shape, it can be easily attached to an existing air conditioner without extensive modification work. Is.

[0131]

As described above, according to the antibacterial and antifungal plate for an air conditioner according to the first invention of the present application, the antibacterial and antifungal agent contained in the resin base material is gradually drained in the drain water. As it elutes in, the excellent antibacterial and antifungal effect lasts for a long time.

Further, according to the air conditioner of the second aspect of the present invention, since the antibacterial and antifungal plate is arranged in the drain dish, the growth of bacteria and mold in the drain water is effectively suppressed and the It is possible to keep the drain equipment clean over a period of time. Therefore, it is possible to prevent clogging of the drain hose and leakage of drain water due to the growth of microorganisms.

[Brief description of drawings]

FIG. 1 is a plan view showing a method of measuring an inhibition circle for microorganisms.

FIG. 2 is a sectional view showing an embodiment of an air conditioner according to the present invention.

[Explanation of symbols]

 1 Petri dish 2 Test piece (antibacterial and antifungal plate) 3 Medium 4 Inhibition circle 5 Growth area 6 Air conditioner 7 Heat exchanger 8 Drain water 9 Drain plate 10 Antibacterial and antifungal plate 11 Ceiling 12 Fan casing 13 Fan 14 Ceiling panel 15 Movable louvers

Front page continued (72) Inventor Masayuki Matsuoka 1-3-9 Shirokanedai, Minato-ku, Tokyo (72) Inventor Renjiro Matsuda 9-18-8 Kitami, Setagaya-ku, Tokyo (72) Inventor Toshihiko Kudo Saitama 1-9-5 Hatogaoka, Hatoyama-cho, Hiki-gun

Claims (2)

[Claims] 1. An antibacterial and antifungal plate for an air conditioner, which is in contact with drain water discharged from an air conditioner to prevent the growth of microorganisms such as bacteria and fungi mixed in the drain water. Dispersed antibacterial and antifungal agent, and a filler that facilitates the dispersal of the antibacterial and antifungal agent into drain water while improving the dispersion of the antibacterial and antifungal agent in the resin base material. A characteristic antibacterial and antifungal plate for air conditioners. 2. An air conditioner equipped with a drain tray for storing drain water discharged from the air conditioner, wherein the antibacterial and antifungal agent is dispersed in a resin base material, and the antibacterial and antifungal agent is dispersed. And a filler for facilitating the elution of the antibacterial and antifungal agent into the drain water, and a resin base material containing the antibacterial and antifungal plate for an air conditioner are arranged in the drain tray. And an air conditioner.