JP2573043B2 - Blower - Google Patents

Description

The present invention relates to a blower. More specifically, the present invention relates to an air conditioner that cools and heats a room and a blower such as a circulation fan that circulates room air.

(B) Conventional technology When the room is kept in a closed state, air conditioning is used to cool or heat the room, or a circulating fan is operated in combination with a hot air heater to heat and humidify the room.
Mold is air conditioner and air filter of circulation fan,
The mold is generated on the surface of the members that come into contact with the airflow, such as the intake grill, fan, and fan casing, and this mold is blown out into the room, causing people in the room to suffer from respiratory illness such as asthma and harm their health. Has occurred.

For this reason, as disclosed in Japanese Utility Model Application Laid-Open No. Sho 61-7729, it has been proposed to apply a commercially available fungicide to the blowing section of an air conditioner by spraying. There is a drawback that the fungicide flows down due to the dew water adhering to the blow-off wall of the mold, and the fungicide effect is not maintained.

On the other hand, various synthetic resin molded products are used as members that come into contact with the air flow as described above. Therefore, for the purpose of preventing the occurrence of mold, it has been proposed to use a synthetic resin molded product formed by adding an antibacterial agent such as a fungicide as such a member (Japanese Patent Application Laid-Open No. 62-106231 and Japanese Patent Application Laid-Open No. 62-106231). Kaisho
57-179522).

(C) Problems to be Solved by the Invention The synthetic resin molded article to which the antibacterial agent is added is used for a long-term antifungal effect by gradually bleeding out the contained antibacterial agent. It is something that can be done.

However, in such a synthetic resin molded article, the bleed-out of the antibacterial agent is promoted by the influence of heat at the time of using the blower, and as a result, the antibacterial effect may be lost in a relatively short time and the antifungal effect may be lost. Was. This tendency was particularly strong in molded articles made of so-called crystalline resins such as polyethylene, polypropylene, and polyamide.

The present invention has been made in view of such circumstances,
In particular, it is an object of the present invention to provide a blower that can exhibit a good antifungal effect over a long period of time.

(D) Means for solving the problem From the above viewpoint, the present inventors have conducted intensive research, and as a result,
The fact that the antibacterial agent is mixed with the acrylic resin fine powder, and then the mixture is added to the material resin to form a synthetic resin molded product as the member, whereby the durability of the antifungal effect is significantly improved. And arrived at the present invention.

Thus, according to the present invention, the synthetic resin member in contact with the airflow in the blower is characterized by being formed of a synthetic resin molded article to which an antibacterial agent obtained by mixing and processing with an acrylic resin fine powder is added. An air blowing device is provided.

"Synthetic resin member in contact with airflow" in the present invention
Means the front panel of the blower, the intake / outlet grill, the main casing, the fan casing, the cross flow fan,
It means an air filter or the like. In particular, a net of an air filter is a suitable object. The synthetic resin constituting the material of these molded products is not particularly limited, but typical examples thereof include polyethylene resin (PE resin), polypropylene resin (PP resin), acrylonitrile-butadiene-styrene resin (ABS resin), and acrylonitrile-styrene resin. (A
S resin), polystyrene resin (PS resin), polyamide resin (PA resin) and the like. Among them, PE resin, PP resin and
It is suitable to use a so-called crystalline resin such as a PA resin.

It is desirable that the antibacterial agent in the present invention does not substantially decompose at the molding temperature of the synthetic resin (about 200 to 250 ° C.) and has an antibacterial action against various kinds of bacteria and fungi. Further, from the viewpoint of not imparting plasticity, a solid powder is preferred. From this viewpoint, diphenyl ethers, N-
It is preferable to use haloalkylthios, benzimidazoles, organic arsenic compounds, or hydrated metal salts of alumina silica.

Here, typical examples of diphenyl ethers are 2,4,4 ′
- trichloro-2'-hydroxydiphenyl ether _{(C 12 H 7 Cl 3 O} 2), which is hexachloro-hydroxydiphenyl ether _{(C 12 H 3 Cl 6 O} 2). A typical example of the N-haloalkylthio compound is N- (fluorodichloromethylthio)
- phthalimide _{(C 9 H 4 Cl 2 FNO} 2 S), N, N- dimethyl -
N'- phenyl -N'- fluorodichloromethylthio sulfamide _{(C 6 H 12 Cl 2 FN} 2 O 2 S 2), an N- trichloromethylthio tetrahydrophthalimide _{(C 6 H 8 Cl 3 NO} 2 S). Representative examples of benzimidazoles include 2- (4-thiazolyl) benzimidazole (C ₁₀ H ₇ N ₃ S) and 2- (methoxycarbonylamino) benzimidazole (C ₉ H ₉ N
₆ O ₂ ). Representative examples of organic arsenic compounds, 10,10'-oxy-bis phenoxy sialic Shin _{(C 24 H 16 As 2 O} 3), there is Arusuchinoru _{(C 11 H 14 AsNO 3 O} 2). Alumina-silica hydrated metal salt of the formula _{^{Me 2 / nO · Al 2 O}} 3 · xSiO 2 · yH 2 O [ wherein Me ²
Is a salt represented by Cu ⁺⁺ , Ag ⁺⁺ , Zn ⁺ ; n, x and y are natural numbers]. Each of these antibacterial agents is a known solid compound at normal temperature. These antibacterial agents may be used alone or in a mixture of two or more.

On the other hand, the acrylic resin fine powder in the present invention is:
It means a fine powder comprising a polymer of an alkyl acrylate or an alkyl methacrylate, and the lower alkyl group constituting the ester includes a C _1-8 alkyl group. Examples of this include poly (methyl meth) acrylate, poly (ethyl meth) acrylate, n-butyl poly (meth) acrylate, and poly (meth) acrylic acid-2-
Ethymehexyl and the like. Further, as the fine powder, those having an average particle size of 0.05 μm to 2 μm are suitable.
As the acrylic resin fine powder, a fine powder generally available as a pigment dispersant, a binder for powder molding, a molding material, or the like can be used.

The mixing treatment of the antimicrobial agent and the acrylic resin fine powder is as follows:
Although both can be performed by directly heating and mixing, it can also be performed by using another resin which is the same as or compatible with the material resin of the synthetic resin molded product as a kind of binder resin. For example, first, a raw resin powder and an antibacterial agent are mixed under heating to obtain a powder or granular material of the raw resin containing or surface-coated with the antibacterial agent, and this is performed by heating and mixing with the acrylic resin fine powder. be able to. In any case, it is suitable to treat the antibacterial agent and the acrylic resin fine powder directly or via a binder resin so that they are mixed and integrated. Therefore, at least the surface of the acrylic resin fine powder is softened. Temperature at which the adhesive does not melt and integrate as a whole (usually 70-80
C). However, when melted and integrated, it can be used after being ground. The amount of the acrylic resin fine powder used at this time is suitably an amount sufficient to sufficiently coat the antibacterial agent, and is usually 0.1 to 5.0 parts by weight based on 1 part by weight of the antibacterial agent. Are suitable. The mixture thus obtained is in the form of a powder or a pulverized product in which the antibacterial agent is directly or indirectly coated with the acrylic resin fine powder.

By adding such a mixture to a synthetic resin molded product, a molded product used in the present invention is obtained.

The addition of the mixture to the molded article is usually carried out by adding and kneading the synthetic resin before molding and shaping. For example, a pellet is formed in advance with a predetermined amount of the mixture and the synthetic resin, and the pellet and the synthetic resin pellet are mixed for about 200 to 2
A method of heating to 50 ° C. to melt and extruding is used. As the molding method itself, a method matching the molded article to be covered is selected and used.

Here, the amount of the mixture added is usually 0.
It is preferable to adjust the amount so as to contain 2 to 5% by weight.

(E) Action Since the antibacterial agent is contained in the resin in a state of being coated with the acrylic resin fine powder by the mixing process, bleed out of the antibacterial agent in the molded resin is suppressed, and the antifungal effect is long. It will last for hours.

(F) Example An example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a front panel attached to the front of a main body 2 of an air conditioner (blower),
And a blowout grill 5 with a wind direction changing blade 4 are provided.

FIG. 2 is a cross-sectional view of the air conditioner taken along the line II-II 'of FIG. 1, and a heat exchanger 7 acting as an evaporator during cooling and as a condenser during heating is provided in a casing 6 of the main body 2.
A cross-flow fan 9 that blows room air sucked from the suction grill 3 through the air filter 8 and the heat exchanger 7 from the blow grill 5, and a fan casing 10 that guides room air from the suction grill 3 to the blow grill 5. And a drain pan 11 for receiving drain water dropped from the heat exchanger 7 during cooling.

Then, the casing 6, the front panel 1, the cross flow fan 9, the fan casing 10, the wind direction changing blade 4 and the air filter 8 are each composed of an antibacterial agent [2- (4-thiazolyl) benz] mixed with fine acrylic resin powder. Imidazole] is added and mixed in an amount equivalent to 1.6% by weight as an antibacterial agent content, and molded with a polypropylene resin.

In the mixing process, 30 parts by weight of 2- (4-thiazolyl) benzimidazole and 200 parts by weight of a polypropylene resin powder (average particle size of about 200 μm) as a binder resin are put into a ball mill and mixed at 120 to 130 ° C. By stirring, particles obtained by coating the surface of the polypropylene resin powder with an antibacterial agent are obtained, and the obtained particles are again powdered in an acrylic resin in a ball mill [average particle size: about 0.4 μm: ultrafine acrylic powder MP: Nippon Kagaku Co., Ltd.] Manufactured by heating and stirring at 10 ° C. at 80 ° C. to obtain particles whose antimicrobial agent surface is coated with fine acrylic resin powder. And the addition to the molded product,
The obtained mixture particles were kneaded with a material resin (PP resin) before molding.

In such an air conditioner, as described above, the antibacterial agent mixed with the acrylic resin fine powder is contained in each synthetic resin molded product that comes into contact with the air flow, and thus the antibacterial agent is simply contained. The durability of the antifungal effect is remarkably improved as compared with the molded product. In particular, the outlet grill 5 to which dew condensation water adheres during cooling, the wind direction changing blades 4 and the drain pan 11 in which drain water accumulates, and the casing 6, the front panel 1, the suction grill 3, the cross flow fan 9, which receive moisture during heating and humidification, No mold is generated on the nonwoven fabric element 12 of the fan casing 10 and the air filter 8.

In addition, after performing a mold-proofing effect persistence test (acceleration test: 70 ° C., 7 days) for the air filter among the above-mentioned molded products, the mold-proofing effect was confirmed according to JIS Z2911. For comparison, the following table also shows the results of an air filter formed by directly adding the antibacterial agent without performing the treatment with the acrylic resin fine powder and performing a test.

Thus, it can be seen that in the examples, the durability of the antifungal effect is remarkably improved.

(G) Effects of the Invention According to the blower of the present invention, the synthetic resin member that comes into contact with the air flow leaks due to dew or drain water during cooling, and mold is generated on the surface even when exposed to humidity during heating and humidification. In addition, since the antibacterial agent is kneaded in a form covered with the acrylic resin fine powder, the antibacterial agent does not disappear and can exert a semipermanent antifungal effect.

In particular, if the present invention is applied to an element of an air filter which is frequently washed with water, it is extremely useful because the fungicide effect is maintained semipermanently.

[Brief description of the drawings]

1 is a perspective view of an air conditioner, and FIG. 2 is a perspective view of the air conditioner cut along a line II-II 'in FIG. 1 front panel 3 suction grille 4 wind direction changing blades 5 blowout grille 6 body casing 9 cross flow fan 10 fan casing 11 drain pan 12 …… Air filter element.

Claims (1)

(57) [Claims] 1. A blower, wherein the synthetic resin member in contact with the air flow in the blower is formed of a synthetic resin molded article to which an antibacterial agent obtained by mixing with an acrylic resin fine powder is added. apparatus.