JP4914878B2 - Air purifier - Google Patents

Description

  The present invention relates to an air purifier for deodorizing, deodorizing, sterilizing, etc., decomposing an organic substance using a photocatalyst, and selectively inactivating bacteria, viruses, etc. by an antibody filter.

  Conventionally, as a photocatalytic filter for the purpose of virus inactivation and an air cleaning device equipped with such a photocatalytic filter, for example, there are those shown in the following patent documents.

JP 2006-223939 A

  Patent Document 1 discloses a configuration of an air purifier in which a photocatalytic filter in which a photocatalytic layer is formed on the surface of a nonwoven fabric fiber entangled so as to form a large number of minute gaps is disposed in an air flow path. Is disclosed.

  By the way, although the conventional air purification apparatus is the structure which arrange | positions a photocatalyst filter in the flow path of air, it is necessary to ensure the flow path of air in an apparatus with ventilation parts, such as an axial fan. When an axial fan is used for the blower, noise during driving becomes a problem. On the other hand, in order to secure the air volume during driving, the axial fan needs to maintain a predetermined rotational speed. As described above, in the air cleaning device having the configuration in which the photocatalytic filter is disposed in the air flow path, the noise of the blower and the air volume in the flow path have a trade-off relationship.

  This invention is made | formed in view of the said situation, The objective is to provide the air purifier which can flow the air with sufficient air volume while being able to suppress the noise at the time of a drive.

The present invention is an air cleaning device for decomposing an organic substance using a photocatalyst,
A case main body having an intake section for taking air into the interior, an exhaust section for sending air to the outside, and a blower section for blowing air from the intake section to a flow path formed between the exhaust sections;
Filter means disposed in the flow path;
It is an air purification apparatus provided with the air guide member which is provided between the said filter means and the said ventilation part, and surrounds the said flow path in a cylinder shape.

  According to the air cleaning device of the present invention, the air flowing from the filter means to the air blowing unit passes through the space surrounded by the air guide member and is sent to the air blowing unit, and the air stays in the device. Therefore, it can be avoided that the air flow is obstructed and the air volume is reduced. For this reason, sufficient air volume can be ensured, suppressing the increase in noise, without raising the rotation speed of the axial flow fan etc. which are used for a ventilation part.

  It is preferable that the air guide member has a configuration in which the area of the opening through which air is circulated decreases from the filter unit toward the air blowing unit. If it carries out like this, air can be efficiently sent into a ventilation part.

  It is preferable that a plurality of air blowing units are provided, the air guide member is disposed on the upstream side of the flow path of each air blow unit, and each air guide member has a symmetrical shape with respect to the flow path.

A first filter having a layer containing the photocatalyst;
A light irradiator for irradiating the first filter with light;
It is preferable to include a second filter disposed on the downstream side of the first filter, which includes a harmful substance removal material formed by supporting an antibody on a carrier.

  The first filter preferably includes a photocatalytic filter and an activated carbon filter. In this way, the odorous substance contained in the air can be decomposed by the catalytic reaction by the light from the light irradiation unit by the photocatalytic filter, and the deodorizing action of the activated carbon filter can be used to deodorize the air.

  It is preferable that the photocatalyst filters are provided in a pair arranged at intervals along the flow path, and the light irradiation unit is arranged between the photocatalyst filters. In this way, a sufficient amount of light can be ensured on the photocatalytic filter.

  Preferably, each of the pair of photocatalytic filters is configured such that an activated carbon filter is provided on the side opposite to the light irradiation unit. In this way, the light applied to the photocatalytic filter is not blocked.

  It is preferable that the second filter has an antibacterial filter carrying organic silver and an antiviral filter carrying an antibody.

  It is preferred that the antibody is an antibody derived from an ostrich egg.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to suppress the noise at the time of a drive, the air purifier which can flow air with sufficient air volume can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing the overall configuration of the air cleaning device. FIG. 2 is a view of the air cleaning device of FIG. 1 as viewed from the intake side. FIG. 3 is a view of the air cleaning device of FIG. 1 as viewed from the exhaust side. FIG. 4 is a cross-sectional view taken along a cross section parallel to the air flow path of the air cleaning device of FIG.

  The air cleaning device 10 includes a case body 11 having a substantially rectangular shape having a predetermined space inside. As shown in FIG. 2, a plurality of air inlets 21 are formed in the side surface 11 a on the air inlet side of the case body 11, and these air inlets 21 function as an air intake part for taking air into the case body 11. To do. Further, as shown in FIG. 3, a plurality of exhaust ports 23 are formed on the side surface 11 b on the exhaust side of the case body 11, and these exhaust ports 23 discharge the air to the outside of the case body 11. Function as.

  A flow path that communicates from the intake port 21 to the exhaust port 23 is formed inside the case body 11. When the air cleaning device 10 is driven, the air taken in from the intake port 21 flows in the direction of arrow F in FIG. 1 and is sent out from the exhaust port 23. Hereinafter, in the embodiment according to the present invention, the intake side is the upstream side and the exhaust side is the downstream side with respect to the flow path.

  A photocatalytic filter 12 is disposed in the flow path of the case body 11. The photocatalyst filter 12 has a substantially rectangular pair shape, has an area substantially equal to the cross-sectional area of the flow path, and has a plane parallel to each other, and the plane flows with respect to the air flow (arrow F) flowing through the flow path. It is arranged to be vertical. In the present embodiment, the photocatalytic filter 12a and the photocatalytic filter 12b are arranged at intervals along the flow path.

  A light irradiation unit 14 that irradiates light to the photocatalytic filter 12 is provided in the flow path inside the case body 11. In this embodiment, the light irradiation part 14 is arrange | positioned between the upstream photocatalyst filter 12a and the downstream photocatalyst filter 12b.

  An activated carbon filter may be provided on the opposite side of the pair of photocatalytic filters 12a and 12b from the light irradiation unit 14. In this way, the light applied to the photocatalytic filter 12 is not blocked.

  The photocatalyst filter 12 and the activated carbon filter can be configured as the first filter, or the first filter can include at least the photocatalyst filter 12.

The photocatalytic filter 12 has a porous fiber layer such as a nonwoven fabric, an inert titanium layer, and an active titanium layer on the inert titanium layer.
As the photocatalyst, titanium oxide (TiO ₂ ) is mainly used, but besides wood, zinc oxide (ZnO), cerium oxide (Ce ₂ O ₃ ), terbium oxide (Tb ₂ O ₃ ), magnesium oxide (MgO), erpium oxide (Er ₂ O ₃ ), potassium tantalate (KTaO ₃ ), cadmium sulfide (CdS), cadmium selenide (CdSe), and [Ru (bpy) ₃ ] ²⁺ , Co complex, etc. are applicable It is. Note that it is desirable to use fine particles of anatase crystal as the active titanium oxide.
The fiber layer having a basis weight be of ^{100g / m 2 ~300g / m 2} , the pressure loss is the initial pressure loss in the standard wind speed 2.5 m / s, it is preferable to use the 20～90Pa.

  A second filter 15 is provided on the downstream side of the photocatalytic filter 12. The second filter 15 includes an antibacterial filter supporting organic silver and an antiviral filter supporting an antibody. The second filter 15 can have the same size and shape as the photocatalytic filter 12.

  In the present invention, the first filter and the second filter function as filter means. The filter means may further include other filters in addition to the first filter and the second filter. Moreover, the kind and structure of each filter of a 1st filter and a 2nd filter are not specifically limited, It can change suitably.

  Next, configurations of the antibacterial filter and the antiviral filter will be described. These filters are harmful substance removal materials comprising a carrier carrying an antibody, and contain at least one selected from sugars, amino acids, SH group protecting agents, and surfactants as antibody stabilizers. By including these antibody stabilizers, denaturation of the antibody supported on the carrier can be prevented, and the activity of the antibody can be maintained for a long period of time regardless of the use environment.

  Examples of the sugar include, but are not limited to, monosaccharides such as glucose, galactose, and fructose; disaccharides such as saccharose, maltose, trehalose, and cellobiose lactose; Examples include oligosaccharides such as sugar, dairy oligosaccharide, maltotriose, and raffinose; sugar alcohols such as erythritol, xylitol, mannitol, sorbitol, and maltitol; polysaccharides such as starch, dextrin, and glycogen. Among these, glucose, galactose, fructose, saccharose, lactose, maltose, trehalose, maltotriose, raffinose, mannitol, and sorbitol are preferable. These sugars may be used alone or in combination of two or more, and may be used simultaneously with other antibody stabilizers.

  Sugar can be used regardless of its raw material and production method. Enzymatic degradation of starch (glucose, maltose, dextrin, etc.), reduced starch (sorbitol, maltitol), starch-enzymatic transfer (trehalose, coupling sugar, etc.), sugar-enzymatic palatinose, sugar Paratinite obtained by reducing lactic acid, lactitol obtained by reducing lactose, xylose obtained by enzymatic degradation of xylan, xylitol obtained by reducing xylan, and the like can be used without particular limitation.

  The desirable addition amount of sugar in the present invention varies depending on the antibody species, sugar species, purpose and application, but is generally 1 to 200% by mass, more preferably 2 to 100% by mass, particularly preferably based on the content (mass) of the antibody. Is 5-50 mass%. When adding a disaccharide or a trisaccharide, the mass ratio is 1 to 1000 times, more preferably 10 to 500 times, and particularly preferably 20 to 200 times the mass ratio of the antibody. When the amount is less than these addition amounts, the stabilizing effect is small, and when the amount is high, the antibody activity may decrease, or the viscosity may increase and the content may be difficult to control or handle.

  The amino acid is not particularly limited, and any natural amino acid or modified amino acid may be used. Preferably, glycine, alanine, valine, leucine, serine, proline, lysine, and glutamic acid are used. These amino acids may be used alone or in combination of two or more, and may be used simultaneously with other antibody stabilizers.

  The desirable addition amount of amino acids in the present invention varies depending on the antibody species / amino acid species, purpose, and application, but is generally 1 to 50% by mass, more preferably 2 to 20% by mass, particularly preferably based on the antibody content (mass). Is 5-10 mass%. When the amount is lower than these addition amounts, the stabilizing effect is small, and when the amount is high, the antibody activity may be reduced and desired performance may not be exhibited.

  The SH group protecting agent is not particularly limited, and examples include 2-mercaptoethanol, dithiothreitol, glutathione, and ethylenediaminetetraacetate. Among these, 2-mercaptoethanol or dithiothreitol is preferable. These SH group protecting agents may be used alone or in combination of two or more thereof, and may be used simultaneously with other antibody stabilizers. Although only SH group protecting agents may be used as antibody stabilizers, inactivation of antibodies often involves multiple causes other than oxidation of SH groups. It is preferable to use in combination with the antibody stabilizer of this kind.

  The desired addition amount of the SH group protecting agent in the present invention varies depending on the antibody species, the SH group protecting agent species, or the purpose / use, but is generally 1 to 20% by mass, more preferably based on the content (mass) of the antibody. It may be 2 to 15% by mass, particularly preferably 5 to 10% by mass. When the amount is lower than these amounts, the stabilizing effect is small, and when the amount is high, the antibody activity may be reduced or the problem of odor may occur.

  As the surfactant, any of cationic, anionic, betaine, and nonionic surfactants may be used. Examples of the cationic surfactant include dodecyltrimethylammonium chloride and hexadecyltrimethylammonium chloride. Examples of the anionic surfactant include sodium dodecyl sulfate, sodium laureth sulfate, and sodium cholate. Examples of betaine surfactants include palmitoyl lysolecithin and 3- [3-colamidopropyldimethylammonio] -1-propanesulfonate. Examples of nonionic surfactants include polyoxyethylene (7) decyl ether and polyoxyethylene (10) isooctyl phenyl ether. As the surfactant, a betaine surfactant or a nonionic surfactant is preferably used, and 3- [3-colamidopropyl] dimethylammonio] -1-propanesulfonate (CHAPS) is particularly preferably used. . The surfactant may be used alone or in combination of two or more thereof, and may be used simultaneously with other antibody stabilizers.

  Surfactants interfere during antibody loading processes (antibody adsorption inhibition, etc.), during use (inhibition of harmful substance adsorption inhibition) and evaluation (elution of antibodies and captured harmful substances, cytotoxicity, effects on chromatography, etc.) Since it can be a substance, the type and amount must be selected more carefully than other stabilizers.

  The desired addition amount of the surfactant in the present invention varies depending on the antibody species / surfactant species and the purpose / use, but is 5 to 20% by mass, more preferably 8 to 15% by mass with respect to the content (mass) of the antibody. Especially preferably, it is 10-12 mass%. When the amount is lower than these addition amounts, the stabilizing effect is reduced. When the amount is higher, the antibody activity is decreased and the antigen-antibody reaction may be inhibited.

  Although it does not specifically limit as a support | carrier, A fiber is preferable. The fiber is preferably a fiber mainly composed of at least one of cellulose ester, vinylon, acrylic, and polyurethane. Moreover, the fiber which has a polyamide as a main component is also preferable. The main component as used in the field of this invention refers to the component which comprises 25% or more in the mass fraction in all the fibers.

  Cellulose ester refers to a cellulose derivative in which a hydroxyl group of cellulose is esterified with an organic acid. Examples of organic acids used for esterification include fatty carboxylic acids such as acetic acid, propionic acid, and butyric acid, and aromatic carboxylic acids such as benzoic acid and salicylic acid. It may be used alone or in combination. Although there is no restriction | limiting in particular about the ester group substitution rate of the hydroxyl group of a cellulose, It is preferable that it is 60% or more.

  Among the group of fibers used as the carrier in the present invention, cellulose acylate fibers are desirable. Cellulose acylate refers to a cellulose ester in which some or all of the hydrogen atoms constituting the hydroxyl group of cellulose are substituted with acyl groups. Examples of the acyl group include an acetyl group, a propionyl group, and a butyryl group. These groups may be constituted by replacing only one kind, or two or more kinds of acyl groups may be mixed and substituted. The total acyl group substitution degree is preferably 2.2 to 3.0, more preferably 2.2 to 2.8, and particularly preferably 2.2 to 2.7. Among these, cellulose acetate, cellulose acetate propionate, or cellulose acetate butyrate that satisfies this degree of substitution is preferable, and cellulose acetate is most preferable. Cellulose acylate is generally known to have different solvents depending on the degree of esterification, but after preparing a carrier with cellulose acylate having a high esterification rate in advance, the surface is hydrophilized by alkali hydrolysis treatment or the like. May be.

  Although it is possible to form a sufficiently practical harmful substance removal material using only cellulose acylate fibers, polyester fibers, polyolefin fibers, polyamides are used for the purpose of further improving strength and dimensional stability. The carrier may be formed of a blended fiber such as a fiber or an acrylic fiber. When blended fiber is used, the mass fraction of the cellulose acylate fiber is preferably 50% or more, and more preferably 70% or more.

  Of the groups of fibers used as carriers in the present invention, polyamide fibers are also desirable.

  In the present specification, polyamide refers to a fiber made of a linear polymer in which chemical structural units are bonded mainly by amide bonds.

  Among polyamides, a linear chain that is a combination of an aliphatic diamine such as ethylenediamine, 1-methylethylenediamine, 1,3-propylenediamine, and hexamethylenediamine and an aliphatic dicarboxylic acid such as malonic acid, succinic acid, and adipic acid. Type aliphatic polyamides are preferred. Nylon 66 is particularly preferable.

  Fats using lactams such as ε-caprolactam and laurolactam, aminocarboxylic acids such as aminocaproic acid and aminoundecanoic acid, para-aminomethylbenzoic acid and the like alone or as a copolymer component in addition to the diamine and dicarboxylic acid. A group polyamide can also be used. In particular, nylon 6 produced by using ε-caprolactam alone is preferable.

  In addition to these, a part or all of the aliphatic diamine used as a raw material is an aliphatic diamine such as cyclohexanediamine, 1,3-bis (aminomethyl) cyclohexane, 1,4-bis (aminomethyl) cyclohexane, etc. Aliphatic polyamides and / or aliphatic polyamides using alicyclic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, etc. may be used in part or in whole as dicarboxylic acids. .

  Furthermore, by using aromatic diamines such as aliphatic paraxylylenediamine (PXDA) and metaxylylenediamine (MXDA), and aromatic dicarboxylic acids such as terephthalic acid as partial raw materials, water absorption is reduced and elastic modulus is improved. Also included is a polyamide that achieves the above. Moreover, the polymer which has an amide bond in a side chain like polyacrylic acid amide, poly (N-methylacrylic acid amide), poly (N, N-dimethylacrylic acid amide), etc. may be sufficient.

  Most preferred among the polyamides is nylon 66 or nylon 6. Appropriate hygroscopicity derived from amide bonds, easy to orient the molecular chain consisting of long chain fatty acids of appropriate length, relatively high stretchability, high heat of fusion and large heat capacity It is difficult to melt in terms of kinetics (melt resistance), the flexibility of molecular chains consisting of long-chain fatty chains, and the property that fibrillation and kink bands do not easily occur due to the formation of hydrogen bonds between amide bonds. This is because it is possible to utilize performances preferable as a carrier, such as flexibility.

  Similarly, for the purpose of improving strength and dimensional stability, the carrier may be reinforced with other appropriate structural materials such as metal, polymer material, ceramics and the like. These reinforcing materials are desirably used for portions other than the substantially outermost surface of the side surface to which the harmful substance removing material is supplied (for example, used on the opposite surface of the side surface or a core material).

  In this specification, vinylon is a fiber composed of a linear polymer containing 65% by mass or more of vinyl alcohol units, and having a moisture content of 7% or less after being left in an environment of temperature 20 ° C. and humidity 65% for 1 week or more. Point to. It may be a formalized hydroxyl group of vinyl alcohol, but it is a non-formalized fiber that has been subjected to water resistance treatment by a polymer such as a boric acid-crosslinked hydroxyl group or a known alkali spinning method or cooling gel spinning method. It may be. Components other than vinyl alcohol units may include ethylene chains, vinyl acetate chains, etc., but fibers formed from vinyl alcohol carriers are preferred. Furthermore, it is most desirable to be a non-formalized fiber by cooling gel spinning in that it is homogeneous and has a high degree of orientation and crystallinity, so that excellent mechanical properties and reliability can be obtained.

  Vinylon generally has high strength, high elastic modulus, moderate hydrophilicity, weather resistance, chemical resistance, adhesiveness, and the like with respect to other fibers, and these preferable performances can be utilized as a carrier. .

  In this specification, acrylic refers to a fiber containing 40% or more of repeating units of acrylonitrile groups, for example, non-ionic such as acrylonitrile homopolymer, acrylate ester, methacrylate ester, and vinyl acetate. Examples include a copolymer of a monomer and acrylonitrile, a copolymer of an anionic monomer such as vinyl sulfonic acid and allyl sulfonic acid and an acrylonitrile, or a copolymer of a cationic monomer such as vinyl pyridine and methyl vinyl pyridine and an acrylonitrile. So-called promix fibers formed from acrylonitrile and milk casein are also included in this category.

  In general, acrylic fibers are often produced by an organic wet spinning method. In this method, when the spinning stock solution forms a coagulated yarn in the coagulation bath, water as a coagulant enters the spinning stock solution spun from the nozzle, while the spinning solvent diffuses from the spun stock solution to the outside. At this time, the water and the organic solvent (DMF, DMAc, etc.) are mutually diffused, so that a polymer is precipitated and a coagulated yarn having a structure in which innumerable cavities are connected in a network form is formed. In addition, it is characterized by deformation of the fiber cross section formed by volume shrinkage due to diffusion of the solvent into the coagulation bath during the coagulation process and formation of irregularities by forming a macrofibril structure on the surface. These fine structures are preferable as the structure of the carrier used in the present invention from the viewpoint of improving the non-surface area and the ease of antibody loading.

  The acrylic fiber used in the present invention varies depending on the composition of the raw material polymer, the spinning method, the post-treatment conditions in the production process, etc., but generally, it is easy to obtain a bulky fiber having moderate hydrophilicity and high weather resistance. There are advantages.

  The polyurethane used in the present invention refers to a fiber composed of a linear synthetic polymer in which the bonding portion between monomers or the bonding portion between base polymer materials is mainly urethane bonds. It is desirable that the polyurethane segment contains 85% or more by mass ratio. It is desirable to be a block copolymer of a segmented polyurethane composed of a soft segment having a low melting point and a soft molecular weight of up to several thousand, and a hard segment having a high melting point and rigidity and high cohesion. Polyethers such as polypropylene glycol and polytetramethylene glycol can be used as the soft segment, and urethane groups formed from 4,4'-diphenylmethane diisocyanate, m-xylene diisocyanate, and the like can be used as the hard segment. Polyurethane is generally characterized by high elasticity. It varies depending on the temporary structure of the polymer chain, such as the chemical structure and distribution of both segments, and on the difference in secondary structure resulting from differences in the spinning conditions, but it stretches well. It has features such as high resilience, resistance to aging compared to rubber materials, and thin fibers can be obtained, and these properties can be utilized even when used as a carrier.

  Further, the volume swelling degree of the fibers constituting the carrier used in the present invention with respect to 20 ° C. water is 1.1% or more and less than 10%, preferably 1.1% or more and less than 8%, particularly preferably 1. 1% or more and less than 6%, most preferably 1.1% or more and less than 5%. In addition, in this specification, the volume swelling degree of the fiber with respect to 20 ° C. water is the density gradient fiber method (JIS-K7112) obtained before and after immersing the dried fiber in 20 ° C. pure water for 1 hour. Refers to the degree of volume swelling.

  Regarding the mechanical properties and dimensional stability of the fibers constituting the carrier, it is desirable that the elongation at drying is 25% or more. Here, the elongation at drying refers to the breaking elongation in a tensile test at 20 ° C. of the fiber dried over a sufficiently long time. In general, it is preferable that the elongation at drying is 10% or more and that it is suitable for the processing of fabrics and the like is 25% or more in order to prevent filter processing and breakage during practical use (leading to a decrease in filtration efficiency). % Or more is more preferable, and 35% or more is most preferable.

  The official moisture content of the fibers constituting the carrier is preferably 1.0% or more and less than 7.0%, more preferably 3.0% or more and less than 6.5%, and more preferably 5.0% or more and 6% or less. Most preferably, it is less than 5%. When disaccharides or trisaccharides are added, the official moisture content is preferably 1.0% or more and less than 7.0%, more preferably 1.5% or more and less than 6.5%. 2.0% or more and less than 6.5% is most preferable. At the official moisture content in this area, the activity of the supported antibody can be expressed, and the carrier's mechanical strength, rigidity, and dimensional stability with respect to the environment (especially humidity) can be obtained. As a result, the filter has high performance and reliability. Can do.

  The moisture content referred to here is the official moisture content, and the official moisture content is the moisture content contained in the fiber when the fiber is left in an environment of 20 ° C. and a relative humidity of 65% for a long time. Point to. In the case of a blended fiber with other fibers, the official moisture content of the entire blended fiber is indicated.

  The surface of the fiber constituting the carrier preferably has a fine concavo-convex structure on the scale of several tens of nanometers to several micrometers. The shape of the irregularities may be a three-dimensional shape such as a groove or streak formed in a direction parallel to the fiber direction, or a groove or streak formed perpendicular to the fiber direction, that is, concentrically with respect to the axis. Three-dimensional shapes may be used, and these three-dimensional shapes formed at an arbitrary angle from the direction parallel to the fiber direction to the vertical direction may exist at an arbitrary ratio and density. Samples obtained by the known cellulose acetate fiber spinning method are known to form a chrysanthemum shape with an indefinite fiber cross section due to the formation of a skin layer on the surface layer and the depression of the skin layer accompanying solvent drying. This unevenness is also a preferred form in the present invention.

  The fine concavo-convex structure on the nanometer to micrometer scale may be a hole and / or a protrusion. It is desirable that the average diameter is a hole or protrusion having a diameter of 50 nm to 1 μm. These vacancies and protrusions are formed in a spinning process by a method such as using a solution in which cavitation of a solution or a fine dispersoid is dispersed (for example, mixing with a slurry in which barium sulfate particles are dispersed), It can be formed in a subsequent step by a method such as hydrolysis of the group or surface oxidation treatment (for example, the surface of the fiber is celluloseized with an aqueous alkali solution and then the microcrater is expressed on the fiber surface by enzyme treatment).

  The average fiber diameter of the fibers used as the carrier is desirably 50 μm or less, more preferably 10 μm or less, particularly preferably 1 μm or less, and most preferably 100 nm or less. When vinylon is used as the carrier, it is preferably 50 μm or less, more preferably 45 μm or less, and most preferably 35 μm or less. In this specification, the average fiber diameter is a numerical value obtained by measuring the diameters in fibers at arbitrary 300 locations from an observation image of a scanning electron microscope (SEM) and arithmetically averaging them.

  The fiber used as a carrier in the present invention can be produced by a general production method such as melt spinning, wet spinning, dry spinning, wet drying spinning, or physical treatment (for example, strong mechanical shearing treatment using an ultra-high pressure homogenizer). In order to ensure stable quality, it is preferable to use dry spinning or wet-dry spinning. In order to produce uniform fibers with an average fiber diameter of 100 nm or less, further processing techniques, 2005, 40, No. 2, 101, and 167; Polymer International, 1995, 36, 195-201 Polymer Preprints, 2000, 41 (2), 1193; Journal of Macromolecular Science: Physics, 1997, B36, 169, etc. It is preferable to employ the electrospinning method.

  Solvents used for spinning include chlorinated solvents such as methylene chloride, chloroform and dichloroethane, amide solvents such as dimethylformamide, dimethylacetamide and N-methylpyrrolidone, and ketones such as acetone, ethyl methyl ketone, methyl isopropyl ketone and cyclohexanone. Any solvent that dissolves the resin used for the synthetic resin fiber, such as a solvent, an ether solvent such as THF or diethyl ether, an alcohol solvent such as methanol, ethanol, or isopropanol, or water can be used. These solvents may be used alone or in combination of two or more.

  When the electrospinning method is employed, a salt such as lithium chloride, lithium bromide, potassium chloride, or sodium chloride may be further added to the resin solution.

  It is desirable that the fibers constituting the carrier of the harmful substance removing material of the present invention have a structure in which a three-dimensional network is formed by partial adhesion. By adopting such a structure, it is possible to improve processing and practical mechanical resistance, and to improve the reliability of the hazardous substance removing material. Moreover, the retention property of an antibody can be improved. The adhesion between fibers can be observed by a method such as SEM. The density of the bonding points between the fibers is preferably 10 or more per 1 mm square with respect to the projected surface area of the harmful substance removing material, and more preferably 100 or more.

  As a method for forming an adhesion point, it may be formed by an adhesion formed by a dry spinning method or a fusion point formed by a melt spinning method, or after spinning, addition of an adhesive, a plasticizing solvent, etc. You may perform the adhesion point formation process by. From the viewpoint of production cost, it is preferable to form adhesion points by a dry spinning method using an appropriate solution formulation.

  The fiber used as a carrier in the present invention may form a nonwoven fabric. There are no particular restrictions on the method of manufacturing the nonwoven fabric, and the web obtained by the dry method, wet papermaking method, meltblown method, spunbond method, flash spinning method, airlaid method, etc., can be used according to the purpose and application. It can be produced by appropriately combining a physical method such as a punch method and a stitch bond method, a heat adhesion method such as a thermal bond method, and a method of developing strength by an adhesive method such as a resin bond.

  The antibody used in the hazardous substance removing material of the present invention is a protein that specifically reacts (antigen-antibody reaction) with a specific harmful substance (antigen), has a molecular size of 7 to 8 nm, and has a Y-shape. Having the molecular form of Of the Y-shaped molecular structure of an antibody, a pair of branch parts is called Fab and a trunk part is called Fc, and among these, a toxic substance is captured at the Fab part.

  The type of the antibody corresponds to the type of harmful substance that can be captured. Examples of harmful substances captured by antibodies include bacteria, molds, viruses, allergens, and mycoplasmas. Specific examples of bacteria include Gram-positive bacteria such as Staphylococcus (S. aureus and Staphylococcus epidermidis), Micrococcus, Anthrax, Bacillus cereus, Bacillus subtilis, Acne, and Gram-negative bacteria. And Pseudomonas aeruginosa, Serratia, Sephacia, Streptococcus pneumoniae, Legionella, and Mycobacterium tuberculosis. Examples of molds include Aspergillus, Penicillius, and Cladosporium. Examples of the virus include influenza virus, coronavirus (SARS virus), adenovirus, rhinovirus and the like. Examples of allergens include pollen, mite allergen, cat allergen and the like. Of these, bacteria and fungi are not inactivated by antibodies, but are bacteriostatic due to a high adsorption effect, whereas viruses and allergens are sterilized and inactivated.

  Examples of the method for producing the antibody include, for example, a method in which an antigen is administered to an animal such as a goat, horse, sheep, or rabbit, and a polyclonal antibody is purified from the blood, and a spleen cell and a cultured cancer cell of the animal to which the antigen is administered. A method for purifying monoclonal antibodies from cell cultures and the body fluids (such as ascites fluid) of the animals in which the cultures or fused cells are implanted, antibodies from genetically modified bacteria, plant cells, or animal cell cultures into which antibody-producing genes have been introduced. A method of purifying a chicken egg antibody or an ostrich egg antibody from egg yolk powder obtained by administering an antigen to birds, particularly chickens or ostriches to produce immune eggs, sterilizing and spray drying egg yolk liquid, defatting egg yolk liquid And a method for purifying a chicken egg antibody solution or an ostrich egg antibody solution by purification by ammonium sulfate fractionation or dialysis. Among these, the method of obtaining an antibody from a chicken egg can easily obtain a large amount of the antibody and can reduce the cost of the harmful substance removing material.

  The antibody used for the harmful substance removing material of the present invention is preferably an antibody derived from avian eggs, more preferably a chicken egg antibody or an ostrich egg antibody.

  As a method of supporting (immobilizing) the antibody on the carrier, in addition to a method of physically adsorbing the antibody on the carrier, the carrier is silanized using γ-aminopropyltriethoxysilane and the like, and then glutarylated. A method of introducing an aldehyde group onto the surface of the carrier with aldehyde or the like and covalently bonding the aldehyde group and the antibody, a method of immobilizing the antibody on the carrier by ionic bonding by immersing an untreated carrier in an aqueous solution of the antibody, a specific method A method of introducing an aldehyde group into a carrier having a functional group and covalently bonding the aldehyde group and the antibody, a method of ion-binding the antibody to a carrier having a specific functional group, and coating the carrier with a polymer having a specific functional group A method of introducing an aldehyde group later and covalently binding the aldehyde group to the antibody can be mentioned.

Here, examples of the specific functional group include an NHR group (R is any alkyl group other than H, methyl, ethyl, propyl, and butyl), NH ₂ group, C ₆ H ₅ NH ₂ group, and CHO group. , COOH group, and OH group.

  Also, there is a method in which the functional group on the surface of the carrier is converted to another functional group using BMPA (N-β-Maleimidopropionic acid) or the like, and then the functional group and the antibody are covalently bonded (SH group in BMPA). Are converted to COOH groups).

  Furthermore, there is a method in which a molecule (Fc receptor, protein A / G, etc.) that selectively binds to the Fc portion of the antibody is introduced onto the surface of the carrier and the antibody Fc is bound thereto. In this case, the Fab that captures the harmful substance faces outward with respect to the carrier, and the probability of contact of the harmful substance with the Fab increases, so that the harmful substance can be efficiently captured.

The antibody may be supported on a carrier via a linker. In this case, the degree of freedom of the antibody on the carrier is increased and access to harmful substances is facilitated, so that high removal performance can be obtained. Examples of the linker include bi- or higher-valent cross-linking reagents, specifically maleimide, NHS (N-Hydroxysuccinimidyl) ester, imide ester, EDC (1-Ethyl-3- [3-dimethylaminopropyl] carbodiimido), There is PMPI (N- [p-Maleimidophenyl] isocyanate), which is selective to target functional groups (SH group, NH ₂ group, COOH group, OH group) and non-selective. Moreover, the distance (space arm) between crosslinks also changes for every crosslink reagent, and it can select in the range of about 0.1 nm-3.5 nm according to the target antibody. From the viewpoint of efficiently capturing harmful substances, those that bind to the Fc of the antibody as a linker are preferred.

  As a method for introducing a linker, either a method in which a linker is bound to an antibody and then further bound to the antibody, or a method in which a linker is bound to a carrier and the antibody is bound to the linker on the carrier is possible. is there.

  Examples of the method of incorporating the antibody stabilizer in the hazardous substance removing material of the present invention include a method of physically adsorbing and impregnating the antibody stabilizer on the carrier and a method of supporting the carrier on the carrier. Examples of the method of supporting the antibody stabilizer on the carrier include a method of covalently bonding a specific functional group of the carrier and the material in the same manner as described above, a method of immobilizing the material on the carrier by ionic bonding, and the like. Can do.

  The method for producing the hazardous substance removing material of the present invention is not particularly limited, and examples thereof include a method for producing a material by immersing a carrier in a solution (supporting solution) containing an antibody and binding the antibody to the carrier. The antibody stabilizer may be dissolved or dispersed in the support liquid, or a solution in which the antibody stabilizer is dissolved or dispersed may be prepared, and the carrier may be immersed before or before the antibody is supported. Among these, it is preferable to use a support liquid containing an antibody and an antibody stabilizer. This is because the antibody and the antibody stabilizer can be simultaneously supported on the carrier. The solution may contain additives such as antibacterial agents and antifungal agents.

  The content ratio between the antibody and the antibody stabilizer in the support liquid is considered to be reflected in the content ratio between the antibody supported on the carrier and the antibody stabilizer in the harmful substance removing material of the present invention. be able to.

The hazardous substance removing material of the present invention can remove harmful substances in the gas phase or liquid phase. The hazardous substance removing material of the present invention can be used for filters for air purifiers, masks, wipe sheets, and the like.
The harmful substance removing material of the present invention has high antibody activity and high antibody stability even in a dry environment where the antibody faces the gas phase.

  The antibacterial filter is preferably subjected to antibacterial processing such as coating with an antibacterial agent and / or antifungal processing such as coating with an antifungal agent on the carrier. Antibodies are basically proteins, especially chicken egg antibodies are food, and may be accompanied by proteins other than antibodies, which are good food for bacteria and mold to grow, If antibacterial processing and / or antifungal processing is performed, the growth of such bacteria and fungi is suppressed, and long-term storage can be performed. Examples of antibacterial / antifungal agents include organic silicon quaternary ammonium salts, organic quaternary ammonium salts, biguanides, polyphenols, chitosan, silver-supporting colloidal silica, and zeolite-supporting silver. The processing method includes post-processing method in which an antibacterial / antifungal agent is impregnated or applied to a fiber carrier, or the raw yarn raw cotton modified by mixing the antibacterial / antifungal agent at the synthesis stage of the fibers constituting the carrier. There is a quality law.

  As the antibacterial agent and antifungal agent, an organic acid silver salt can be used. The organic acid silver salt preferably has 14 to 24 carbon atoms and is linear. The organic acid that forms the silver salt is preferably a linear fatty acid. The number of carbon atoms in the fatty acid is preferably between 14 and 24. When the number of carbon atoms is less than 14, the influence of steric hindrance is small, the organic acid silver salt attacks the S—S bond of the antibody, and the antibody is destroyed. On the other hand, when the number of carbon atoms is larger than 24, the amount of released silver ions decreases due to the solubility product with silver, and the antibacterial effect is reduced. The organic silver salt is described in Research Disclosure Magazine Nos. 17029 and 29963. About a manufacturing method, Unexamined-Japanese-Patent No. 2000-187298 (Fujifilm Corporation) etc. have description. If the antibody filter according to the present invention is configured to carry at least one of an antibacterial agent and an antifungal agent, bacteria and viruses can be selected by combining the antibody filter while decomposing odorous substances by the photocatalyst. In particular, by using an antibody and an organic silver antibacterial agent in combination, an antibody filter having an antibacterial effect can be supplied while maintaining the selective inactivation effect of the antibody.

  The photocatalyst filters 12 a and 12 b and the second filter 15 are held by a filter cassette 50 and are disposed at predetermined positions by attaching the filter cassette 50 to the case body 11. In the present embodiment, the photocatalytic filters 12a and 12b and the second filter 15 have a long plate shape, extend in a direction perpendicular to the flow path, allow air flow, and are visually observed. It is arranged so as to shield with.

  The light irradiation unit 14 emits ultraviolet light having a wavelength of about 300 nm to 420 nm, which is a wavelength with which the photocatalyst reacts. In the present embodiment, a fluorescent lamp is used as the light source of the light irradiation unit 14. However, the present invention is not limited to this. For example, an LED (Light Emitting Diode) or other ultraviolet irradiation device may be used. A glow lamp for lighting a fluorescent lamp may be provided in the vicinity of the light irradiation unit 14 of the present embodiment.

  As shown in FIGS. 1 and 4, a blower 16 is provided downstream of the flow path of the case body 11 and immediately before the exhaust port 23 (in the vicinity of the upstream side). In the present embodiment, an axial fan is used as the blower unit 16. At the time of driving, the air blower 16 sends the air inside the flow path from the downstream exhaust port 23 by the rotation of the fan, so that the air is taken in from the upstream intake port 21 in the flow path, and the air is taken along the flow path. An air flow indicated by an arrow F in FIG. 1 is generated such that the air is sent from the exhaust port 23 on the downstream side. The blower unit 16 is not limited to an axial fan, and may be a sirocco fan or the like. In the configuration shown in FIG. 1, a plurality (two) of air blowing sections 16 are arranged in a direction perpendicular to the flow path.

  Further, the side surface 11 a on the intake side of the case body 11 is provided with a power switch 26 and an air volume adjusting unit 24 that allows the user to adjust the flow rate of air blown from the air blowing unit 16.

  Further, as shown in FIG. 4, light from the light irradiation unit 14 is prevented from leaking from the intake port 21 to the outside of the case body 11 on the upstream side of the flow path and on the downstream side of the intake port 21. Therefore, a light shielding member 42 to be described later is provided. If it carries out like this, it can prevent that harmful light to a human body, such as an ultraviolet-ray, will be irradiated outside at the time of a drive, and safety | security can be ensured.

  Further, as shown in FIG. 1, a light shielding member 44 may be provided between the light irradiation unit 14 and the second filter 15. In addition, another light shielding member 42 may be provided in the vicinity of the downstream side of the air inlet 21 in the flow path. The configuration of the light shielding members 42 and 44 will be described later.

  Between the second filter 15 and each blower unit 16, an air guide member 60 for guiding the air that has passed through the second filter 15 to the blower unit 16 is provided. One air guide member 60 is provided on the upstream side of each blower 16.

FIG. 5 is a diagram illustrating the configuration of the air guide member. Fig.5 (a) is a perspective view explaining the positional relationship of a ventilation part and a wind guide member, FIG.5 (b) is the figure which planarly viewed the ventilation part and the wind guide member.
The air guide member 60 has a shape that surrounds the flow path in a cylindrical shape by the four side plate portions 62. In the air guide member 60, air flows from the upstream side opening 64 along the flow path, the air passes through the cavity surrounded by the side plate part 62, and the opening on the opposite side (downstream side) is close to the air blowing part 16. Or it is comprised so that it may connect. The opening area on the downstream side of the air guide member 60 is set to be approximately equal to the area of the air blowing unit 16 on the air intake side.

  As shown in FIG. 5B, the air guide member 60 has a configuration in which the area of the opening through which air is circulated decreases from the second filter 15 side toward the air blowing unit 16 side. If it carries out like this, air can be efficiently sent into the ventilation part 16. FIG. For example, as shown in FIG. 5B, the width dimension of the upstream opening 64 of the air guide member 60 (the dimension in the direction perpendicular to the flow path) is W1, and the width dimension of the downstream opening is W2. In this case, W1> W2 and the width dimension W2 of the opening on the downstream side can be set to be substantially equal to the width dimension of the blower section 16.

  Each of the air guide members 60 provided corresponding to each of the plurality of air blowing units can have the same shape. Alternatively, the air guide members 60 may be different from each other, but in this case, each of the air guide members 60 is preferably symmetrical with respect to the flow path.

FIG. 6 is a diagram illustrating a configuration of a blower provided in a symmetrical shape with respect to the flow path. Although FIG. 6 illustrates an example in which two air blowing units are arranged in a direction perpendicular to the flow path, the number of air blowing units is not particularly limited.
In FIG. 6A, the alternate long and short dash line in the drawing indicates a line passing through the center of the air intake area of each blower unit 16, and C in FIG. Shows the center. In this example, the openings 64 on the upstream side of the respective air guide members 60 are opened so as to be symmetric with respect to the center of the blower portion 16. Thus, by configuring each of the plurality of air guide members 60 so as to have a symmetrical shape with respect to the flow path, the air flowing along the flow path is less likely to be disturbed and stays in the apparatus. Therefore, the airflow can be prevented from being lowered.

Next, the control system of the air cleaning apparatus 10 of this embodiment is demonstrated.
FIG. 7 is a block diagram showing a control system of the air cleaning device of the present embodiment. In the embodiments described below, members having the same configuration / action as those already described are denoted by the same or corresponding reference numerals in the drawings, and description thereof is simplified or omitted. In the air cleaning device 10, a power supply circuit 32 that supplies electricity to the light irradiation unit 14 and the air blowing unit 16, a motor control unit 33, and a transformer capable of converting the voltage of the light irradiation unit 14 are provided inside the case body 11. A vessel 34 is provided. When the air cleaning device 10 is driven, a predetermined voltage is supplied to the motor control unit 33, the light irradiation unit 14, and the transformer 34 by starting the power supply circuit 32. By setting the transformer 34 to a predetermined frequency (for example, frequencies 50 Hz and 60 Hz), it is possible to switch the voltage applied to the light irradiation unit 14. By driving the motor control unit 33, the air blowing unit 16 is driven, and the air starts to flow along the flow path of the case body 11. Simultaneously with the start of driving of the air blowing unit 16 or before and after the start of the driving, the light irradiation unit 14 is driven to start the light irradiation, and the photocatalytic filter 12 generates active oxygen and flows by the air blowing unit 16. The active oxygen is diffused into the ambient atmosphere of the air cleaning device 10 by air.

  Here, the air cleaning device 10 is connected to at least one of the sensor unit 36 that detects the amount of organic substances in the atmosphere, the light irradiation unit 14, and the air blowing unit 16 in a state in which signals can be input and output. A drive control unit 38 is provided. The sensor unit 36 outputs a detection signal to the drive control unit 38 when an organic substance is detected. The drive control part 38 can control at least one of the light irradiation part 14 and the ventilation part 16 based on the detection signal of an organic substance. When controlling the light irradiation part 14, the quantity of the light to irradiate and the time to irradiate light can be controlled. Moreover, you may have the timer function which sets lighting of the light irradiation part 14 to intermittent operation, and complete | finishes irradiation. When controlling the air blower 16, the amount of air to be blown and the time to blow can be controlled. Moreover, you may have the timer function which sets the drive of the ventilation part 16 to intermittent operation, and complete | finishes ventilation.

  Examples of odors detected by the sensor unit 36 include body odors and bad breaths from the human body, alcohol substances, and organic substances produced from pet manure. Moreover, a sensor part is not limited to an odor, For example, house dusts, such as a tick, dust, and pollen can also be detected.

  FIG. 8 is a perspective view showing the configuration of the light shielding member. 9 is a cross-sectional view taken along the line AA in FIG. The light shielding members 42 and 44 are formed in substantially rectangular frame bodies 52 and 54 and the frame bodies 52 and 54, respectively, in the direction in which air flows (arrow F in FIG. 6). And a plurality of light shielding plates 52a and 54a for shielding the passage of light. In the present embodiment, the light shielding members 42 and 44 are used in a state where the frame bodies 52 and 54 having the same configuration are overlapped with each other. The plurality of light shielding plates 52 a and 54 a are arranged in parallel with each other at substantially equal intervals, and the light shielding plates 52 a and 54 a communicate with each other from the upstream side to the downstream side, and from the upstream surface of the frame body 52. The inflowing air is allowed to pass out of the downstream surface. The inclination angles I of the plurality of light shielding plates 52a and 54a are all equal, and are preferably in the range of 30 ° to 50 ° with respect to the horizontal direction of the case body 11 (left and right direction in FIG. 9).

  The light shielding members 42 and 44 of this embodiment are arranged with a plurality of frame bodies 52 and 54 overlapped, and are arranged in a state in which the direction of inclination of the light shielding plates of adjacent frame bodies is opposite. The light shielding members 42 and 44 may be configured by any one of the frame bodies 52 and 54 and a plurality of light shielding plates 52a and 54a formed thereon. At this time, the light shielding member 42 is disposed in a state where the direction of inclination of the light shielding plate 52a is opposite to the light shielding plate 54a of the adjacent light shielding member 44.

  FIG. 10 is a partial cross-sectional view showing a modification of the light shielding member of the present embodiment. As shown in FIG. 10, photocatalytic layers 56a and 56b may be formed on the upper and lower surfaces of the light shielding plate 52a. The photocatalyst layers 56a and 56b can have the same configuration as the photocatalyst filters 12a and 12b. For example, the photocatalyst layers may be configured by sticking the photocatalyst filter to the upper and lower surfaces of the light shielding plate 52a. The photocatalyst layers 56a and 56b may be formed only on either the upper surface or the lower surface of the light shielding plate 52a. In this way, the light from the light irradiation unit 14 is irradiated to the light shielding plate 52a, thereby preventing the light from being irradiated downstream by the light shielding plate 52a, and the photocatalysts in the photocatalyst layers 56a and 56b of the light shielding plate 52a. Can cause a reaction.

(Example)
Next, based on the air cleaning apparatus of this embodiment, the test which measures an Example and a comparative example as follows was done. Note that the air purifiers used in the examples and comparative examples have the same configuration as the air purifiers described above unless otherwise described, and the description is omitted or simplified.

(Create antibody filter)
A dry non-woven fabric having a basis weight of 100 g / m ² , prepared by using vinylon fibers as main fibers, polyester fibers, and resin bonding with an acrylic adhesive, was prepared as a base material. It was 25 micrometers when the average fiber diameter was measured with SEM of this nonwoven fabric. Next, an influenza antibody (IgY antibody) produced by purifying an immunized egg born by an ostrich administered with the antigen is diluted with phosphate buffered saline (PBS), prepared to an antibody concentration of 100 ppm, and further sucrose. After adding and stirring to 10000 ppm, a supported liquid was prepared by filtration through a 0.45 μm filter. The nonwoven fabric was immersed in this supporting liquid at room temperature for 5 minutes to support the antibody on the fiber surface, and a filter sample (N-1) was obtained.

(Create antibacterial filter)
A dry non-woven fabric having a basis weight of 100 g / m ² , prepared by using vinylon fibers as main fibers, polyester fibers, and resin bonding with an acrylic adhesive, was prepared as a base material. It was 25 micrometers when the average fiber diameter was measured with SEM of this nonwoven fabric. Next, the non-woven fabric was immersed in a solution prepared by adjusting the silver behenate suspension so that the silver behenate concentration was 200 ppm at room temperature for 5 minutes to support silver behenate on the fiber surface, and a filter sample (N-2) was obtained. Obtained.

(Create photocatalytic filter)
Wire diameter 20μ made of polyester, thickness 8 mm, basis weight 170 g / ^{m 2} nonwoven photocatalytic coating agent (TKC-304: manufactured by Tayca Corporation) were carried to a 10g per 1 m ^2, then 3 minutes drying at 120 ° C. A photocatalytic filter was prepared.

(Creation of activated carbon filter)
An activated carbon nonwoven fabric filter was prepared using a low-pressure loss nonwoven fabric with reduced basis weight. An activated carbon filter carrying an activated carbon (Kuraray Coal GG) 40 g / m ² was prepared by applying an acrylic resin to a non-woven fabric with a linear 30-50 μm polyester / vinylon system, a film thickness of 0.5 mm, and a basis weight of 50 g / m ² .

  Next, filter configurations of Examples and Comparative Examples and an evaluation method of this measurement will be described. FIG. 11 is a plan view schematically illustrating a configuration in the vicinity of the air blowing unit of the comparative example and the example.

(Comparative Example 1)
A deodorizing filter frame was created, and the photocatalyst and activated carbon were put together in the frame. An antibacterial / antiviral filter frame was created, and an organic silver filter and an antibody filter were placed in the frame. This frame is provided with a filter holding part that is detachably held. In the configuration of the embodiment, the above-prepared antibody filter is arranged at the most downstream side of the air flow, and a pair of photocatalysts are arranged upstream, A cold-cathode tube that efficiently radiates near-ultraviolet rays was placed in The activated carbon filter was installed so as to overlap the surface opposite to the photocatalytic surface facing the cold cathode tube in order to effectively radiate UV light to the titanium surface. Comparative Example 1 is a state in which two axial fans at the most downstream as the air blowing section are arranged in the direction perpendicular to the flow path indicated by the arrow as shown in FIG.

(Comparative Example 2)
The filter configuration was the same as in Comparative Example 1. Further, as shown in FIG. 11B, a state in which two axial fans are arranged in a direction perpendicular to the flow path indicated by an arrow is referred to as Comparative Example 2. The interval between the axial fans was made larger than that in FIG. Note that the rotation speed of the fan at the time of measurement is the same as in Comparative Example 1.

Example 1
The filter configuration was the same as in Comparative Examples 1 and 2. Moreover, as shown in FIG.11 (c), the airflow guide member which encloses a flow path in the cylinder shape was provided in the upstream of each of two axial flow fans. The air guide member is formed so that each upstream opening is biased toward the side surface of the case body. The arrangement of the two axial fans is the same as that shown in Comparative Example 1 shown in FIG. Note that the number of rotations of the fan at the time of measurement is the same as in Comparative Examples 1 and 2.

(Example 2)
The filter configuration was the same as in Comparative Examples 1 and 2. Moreover, as shown in FIG.11 (d), the airflow guide member which encloses a flow path in the cylinder shape was provided in the upstream of each of two axial flow fans. Each of the air guide members has a symmetrical shape with respect to the flow path. The arrangement of the two axial fans is the same as that shown in Comparative Example 2 shown in FIG. Note that the number of rotations of the fan at the time of measurement is the same as in Comparative Examples 1 and 2.

(Deodorization effect evaluation)
The deodorizing effect of the air purifier was evaluated by ammonia concentration. A closed space (1 m ³ ) in which the test was performed After adjusting the initial ammonia (NH ₃ ) concentration to 10 ppm, the air purifier was driven, and the ammonia concentration after 15 minutes was measured with a detector tube.

(Air volume evaluation)
As for the air volume, a cylinder having a length of 26 cm, a width of 7 cm, and a length of 30 cm was prepared, attached to the outlet, measured at 10 wind speeds (m / s), and the air volume (m ³ / min) was determined from the average value. When the volume of each device of the example and the comparative example was measured with a sound level meter specified in JIS C1502 in a semi-anechoic room, both were 18 dB and no difference was observed. The results of this measurement are shown in the table below.

  According to the result of this measurement, in Examples 1 and 2, by providing a wind guide member upstream of each air blowing portion, a reduction in the air volume is prevented compared to Comparative Examples 1 and 2 in which no wind guide member is provided. And a high deodorizing effect was obtained. On the other hand, in Comparative Examples 1 and 2, a decrease in the air volume occurred, and due to this, the deodorizing effect was lower than in Examples 1 and 2.

It is a figure which shows the structure of one Embodiment of the air purifying apparatus concerning this invention. It is the figure which looked at the air purifying apparatus of FIG. 1 from the intake side. It is the figure which looked at the air purifying apparatus of FIG. 1 from the exhaust side. It is sectional drawing cut | disconnected by the cross section parallel to the flow path of the air of the air purifying apparatus of FIG. It is a figure explaining the structure of a wind guide member. It is a figure which shows the structure of the air guide member provided with the symmetrical shape with respect to the flow path. It is a block diagram which shows the control system of the air purifying apparatus of this embodiment. It is a perspective view which shows the structure of a light-shielding member. It is sectional drawing seen from the AA line direction of FIG. It is a fragmentary sectional view which shows the modification of a light shielding member. It is a figure which shows the structure of the ventilation part vicinity of each of a comparative example and an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air purifier 11 Case main body 12 (12a, 12b) Photocatalyst filter 14 Light irradiation part 15 Antibody filter 16 Blower parts 42 and 44 Light shielding member 60 Air guide member

Claims (6)

An air cleaning device that decomposes an organic substance using a photocatalyst,
A case body having an intake portion for taking air into the interior and an exhaust portion for sending air to the outside;
A plurality of air blowing sections for blowing air to a flow path formed between the air intake section and the exhaust section; and filter means disposed on the upstream side of the plurality of air blowing sections in the flow path;
Provided between each of said filter means and said plurality of air blowing portion, a plurality of air guide members surrounding said flow passage in a tubular shape,
With
Each of the plurality of air guide members has a symmetrical shape with respect to the flow path, and an area of an opening through which the air flows from the filter means toward the air blowing portion is reduced.
The filter means is disposed between the first filter including a pair of photocatalyst filters arranged at intervals along the flow path and the pair of photocatalyst filters, and irradiates the photocatalyst filters with light. And an air cleaning unit. The air purifier according to claim 1 ,
The air cleaning device, wherein the first filter further includes an activated carbon filter. The air cleaning device according to claim 2 ,
An air cleaning device in which the activated carbon filter is provided on the opposite side of the light irradiation unit of each of the pair of photocatalytic filters. The air cleaning device according to any one of claims 1 to 3,
It said filter means comprises a hazardous substance-removing material obtained by carrying antibodies to the carrier, the first of the second filter disposed on the downstream side of the filter, further comprising in that the air cleaning device. The air cleaning device according to claim 4 ,
The air cleaning device, wherein the second filter includes an antibacterial filter supporting organic silver and an antiviral filter supporting an antibody. The air cleaning device according to claim 5 ,
An air cleaning apparatus , wherein the antibody is an antibody derived from an ostrich egg.

Images