JP4992476B2 - Vaporization filter and humidifier - Google Patents

Description

  The present invention relates to a vaporization filter and a humidifier using the same.

  An example of a conventional humidifier is shown in FIG. That is, the end surface of the sheet-shaped vaporization filter 101 deformed into a wave shape or a U-shape is immersed in the water tank 102, and the humidified air is passed by the fan 103 through the interval between the sheet-shaped vaporization filters 101 that sucked up water. Air is obtained (for example, refer to Patent Document 1).

In addition, in order to impart stable water absorption and antibacterial properties, this type of vaporization filter is impregnated with a synthetic resin emulsion containing a hydrophilic porous fine powder and an antibacterial agent to impregnate the hydrophilic filter. There is also one in which a porous porous fine powder and an antibacterial agent are attached to a substrate via a synthetic resin. That is, as shown in FIG. 8 as an example, the vaporization filter 201 immersed in the water tank 202 carries the hydrophilic porous fine powder and the antibacterial agent on itself, and the vaporization filter 201 sucked up the water Then, stable humidified air is obtained by bringing dry air into contact (see, for example, Patent Document 2).
Japanese Patent No. 2514145 Japanese Patent No. 3128581

  However, in the method in which dry air is passed through a vaporization filter that sucks up water, a trace amount of compounds containing elements such as silicon, calcium, and magnesium contained in the supplied water, bacteria, and mold also enter the vaporization filter. Therefore, there is a problem that even after washing, the dirt is not easily removed and cannot be kept clean.

  Further, in the method of impregnating a base material with a synthetic resin emulsion containing a hydrophilic porous fine powder and an antibacterial agent, it is difficult to uniformly apply the hydrophilic porous fine powder to the base material. That is, when a powder having a coarse particle diameter is used, uniformity is lost due to sedimentation of the powder, and when a fine powder is used, coarse secondary particles are formed by agglomeration of fine powders. There was a problem that it was easy. If a surfactant is added to prevent particle aggregation, the surfactant remains on the created vaporization filter, and bubbles and water films are generated when the vaporization filter is brought into contact with water. There was a problem that the pressure loss of the was increased. In addition, in order to obtain the vaporization performance of the vaporization filter, it is necessary to attach a large amount of hydrophilic porous material to the base material, which causes a problem that the pressure loss of the base material tends to increase.

  The present invention solves such problems, and provides a vaporization filter having a low pressure loss by uniformly coating a substrate surface with a treatment liquid containing a synthetic resin emulsion and colloidal silica.

  In addition, water does not enter the inside of the base material, and the surface of the base material is soiled, but the inside of the base material is not soiled or bacteria are propagated, so that it can be easily washed and kept clean. The vaporization filter which can be provided is provided.

  Further, the present invention provides a vaporization filter that does not generate bubbles or a water film even when excess surfactant is adsorbed and removed and the vaporization filter is brought into contact with water.

  Moreover, the dispersibility of a hydrophobic material is improved and the vaporization filter by which the hydrophobic material was uniformly apply | coated to the base material is provided.

  Moreover, the humidification device provided with the vaporization filter of this invention is provided.

The vaporization filter of the present invention is characterized in that a treatment liquid containing a hydrophobic material, a synthetic resin emulsion, and colloidal silica is applied to a base material having a void through which air can pass.

  Further, the colloidal silica has a particle size that is 1/3 or less of the particle size of the synthetic resin emulsion.

  Moreover, the hydrophobic material is fixed to a base material having a void through which air can pass through a synthetic resin and colloidal silica.

  Further, the hydrophobic material is characterized in that solid particles are subjected to a hydrophobic treatment.

  Further, the hydrophobizing treatment method is silane treatment.

  The hydrophobic material is any one or more selected from talc, activated carbon, high silica zeolite, hydrophobic silica gel, and hydrophobic metal.

  In addition, the hydrophobic material includes an antibacterial metal.

  Further, the synthetic resin emulsion is characterized by containing a solid component of 8% or more by weight with respect to the hydrophobic material.

  Further, the base material has a three-dimensional network structure.

  The vaporization filter of the present invention is characterized in that a synthetic resin emulsion and colloidal silica are dispersed in a mixed solution of water and alcohol and applied to a substrate.

  Further, the volume mixing ratio of water and alcohol is characterized in that alcohol is 7 or less with respect to water 1.

Further, the humidifying device of the present invention, the vaporization filter according to any one of claims 1 to 1 1, a water supply means, and a blowing means to supply water to the vaporization filter by the water supply means, said It is characterized in that air is blown to the vaporizing filter by a blowing means to perform humidification.

A vaporization filter according to any one of claims 1 to 14, a water supply means, a blower means, and an air heating means, wherein water is supplied to the vaporization filter by the water supply means, and the blower means is used. The air blown to the vaporization filter is heated by the air heating means to perform humidification.

  ADVANTAGE OF THE INVENTION According to this invention, the process liquid containing a synthetic resin emulsion and colloidal silica can be uniformly coat | covered on the base-material surface, and the vaporization filter with a low pressure loss can be provided.

  By forming an uneven shape on the surface of the vaporization filter, the surface area of the vaporization filter can be increased, the contact area of dry air and water increases, compared to the case where a synthetic resin emulsion not containing colloidal silica is used. Thus, there is an effect that higher humidification performance can be obtained.

  In addition, water does not enter the inside of the base material, and the surface of the base material is soiled, but the inside of the base material is not soiled or bacteria are propagated, so that it can be easily washed and kept clean. The vaporization filter which can be provided can be provided.

  Further, it is possible to provide a vaporization filter that does not generate bubbles or a water film even when excess surfactant is removed by adsorption and the vaporization filter is brought into contact with water.

  Moreover, the dispersibility of the hydrophobic material can be improved, and a vaporization filter in which the hydrophobic material is uniformly applied to the substrate can be provided.

  Moreover, the humidification apparatus provided with the vaporization filter of this invention can be provided.

The invention described in claim 1 of the present invention is characterized in that a treatment liquid containing a hydrophobic material, a synthetic resin emulsion, and colloidal silica is applied to a substrate having a void through which air can pass. Since colloidal silica is fine colloidal particles of several tens to several hundreds of nanometers, a high dispersion state can be obtained when mixed and dispersed in a synthetic resin emulsion. As in Patent Document 2, since the dispersion state of the emulsion is better than a synthetic resin emulsion containing a hydrophilic porous fine powder and an antibacterial agent, the treatment liquid containing the synthetic resin emulsion and colloidal silica is impregnated when the substrate is impregnated. It has the effect | action that uniform coating by can be performed. In addition, since the colloidal silica particle size is small, a sufficient effect can be achieved even with a small amount of coating, and it is not necessary to attach a large amount of hydrophilic porous material to the substrate as in Patent Document 2. The pressure loss can be kept low. In addition, when a surfactant is present in water, there is a problem that when the vaporization filter is immersed in water, the pressure loss of the vaporization filter increases due to a phenomenon such as formation of a water film or foaming. Since the hydrophobic material has a property of adsorbing the surfactant, the application of the hydrophobic material to the vaporization filter has the effect that the surfactant can be removed and the pressure loss can be kept low.

  Further, in the synthetic resin emulsion containing colloidal silica, the fusion of the resin is partially inhibited by the colloidal silica on the surface of the synthetic resin particles during drying, and voids surrounded by the colloidal silica are generated, so that the vaporization filter surface is uneven. A shape can be formed. For this reason, the surface area of the vaporization filter can be increased, the contact area of dry air and water is increased, and higher humidification performance can be obtained as compared with the case where a synthetic resin emulsion not containing colloidal silica is used. It has the effect.

  Moreover, since the silica particles obtained by impregnating and drying colloidal silica are excellent in heat resistance and moisture resistance, there is little deterioration in an atmosphere in which wetting and drying are repeated, and there is an effect of imparting durability to the vaporization filter.

  Although the material is not particularly limited as a base material having a void through which air can pass, for example, resin, metal, ceramics, or the like can be used. Examples of the resin include polyamides, polyimides, polyesters, polystyrenes, polyurethanes, polyolefins, polycarbonates, acrylics, celluloses, polypropylenes, polyethylenes, and copolymers and derivatives thereof. Among these, the urethane foam resin has many air gaps inside, so that it has excellent air permeability, and is inexpensive, flexible, and easy to process. In addition, if metal is used, it has excellent durability and antibacterial properties such as silver, copper, nickel, and zinc can be used to add antibacterial properties to the vaporization filter. Can continue. If the substrate is not water-absorbing like metal, water is retained only on the surface layer portion and does not enter the interior of the substrate. Since ceramics are excellent in heat resistance and moisture resistance, durability in use under an atmosphere of repeated drying and wetting can be obtained.

  Examples of the synthetic resin emulsion include those obtained by polymerizing α, β-ethylenically unsaturated monomers and acrylic silane or vinyl silane. α, β-ethylenically unsaturated monomers include methyl acrylate, ethyl acrylate, acrylic acid esters such as 2-ethylhexyl acrylate, lauryl acrylate, methyl methacrylate, ethyl methacrylate, methacrylic acid Examples thereof include methacrylic acid esters such as butyl, isobutyl methacrylate, 2-ethylhexyl methacrylate, and lauryl methacrylate, acrylonitrile, methacrylonitrile, styrene, methylstyrene, and chlorostyrene. Examples of the acrylic silane or vinyl silane include vinyl trimethoxy silane, vinyl triethoxy silane, vinyl tris (2-methoxy ethoxy) silane, vinyl triacetoxy silane, γ-methacryloxypropyl trimethoxy silane, vinyl trichloro silane, and the like. In addition, aminosilane or epoxysilane may be used as the silane compound.

  Further, the colloidal silica particle size is 1/3 or less of the particle size of the synthetic resin emulsion, and the silica particles are arranged so as to cover the periphery of the synthetic resin, thereby providing a base material. A surface film having a strong affinity for water can be formed on the surface, which has the effect of improving the performance of the vaporization filter. Moreover, it has the effect | action of increasing a surface area by the unevenness | corrugation of a fine silica particle, and improving the performance of a vaporization filter. Examples of colloidal silica include colloidally dispersed ultrafine silica sol or ultrafine powder silica. There is no particular problem even if components such as alumina sol and titania sol are mixed. The particle diameter of the colloidal silica may be 1/3 or less of the particle diameter of the synthetic resin emulsion, but is particularly preferably 0.01 μm or less. The synthetic resin emulsion and colloidal silica may be emulsion-polymerized and a part of the molecular structure may be bonded.

  Examples of the fungicide include organic nitrogen compounds, sulfur compounds, organic acid esters, organic iodine imidazole compounds, and benzazole compounds.

  In addition, with a vaporization filter coated with a hydrophilic material, trace amounts of compounds containing elements such as silicon, calcium, and magnesium contained in water, bacteria, and mold enter the vaporization filter and are easy to clean. There was a problem that the surface was not cleaned and could not be kept clean. In the present invention, since the hydrophobic material is applied to the vaporization filter, the surface of the vaporization filter becomes hydrophobic and water on the vaporization filter is easily repelled. Since the filter dries quickly and water does not enter the inside of the base material, the surface of the base material is contaminated, but there is little possibility that the inside of the base material is contaminated or bacteria are propagated. Therefore, the vaporization filter which can wash | clean a filter easily and can keep clean can be provided.

  Moreover, the hydrophobic material is fixed to a base material having a void through which air can pass through a synthetic resin and colloidal silica. Since the hydrophobic material and the colloidal silica are bonded via a silanol group, higher adhesive strength can be obtained, and the hydrophobic material can be prevented from peeling from the substrate. As a result, a vaporization filter that can exhibit stable performance over a long period of time can be provided.

  In addition, the hydrophobic material is characterized in that the solid particles are subjected to a hydrophobic treatment, and the surface of the solid particles is subjected to a hydrophobic treatment so that the adsorption action and the water repellency of the surfactant are improved. Can be granted. Since water tends to be separated from the solid particles and a water film is not formed between the voids of the solid particles, it is possible to prevent air flow inhibition by the water film, the contact area between the water and dry air is large, and the humidification efficiency A good vaporization filter can be provided.

  Further, the hydrophobic treatment method is silane treatment. Fluorine treatment, silane treatment, and the like can be given as methods for hydrophobizing the material, but fluorine treatment is not preferable because the bond between the synthetic resin and colloidal silica is weak and the material is easily peeled off from the vaporization filter. As the silane treatment, a known method such as a method of applying a liquid obtained by hydrolyzing a silane compound with an acid or an alkali to the solid particles and drying can be used.

  The hydrophobic material is any one or more selected from talc, activated carbon, high silica zeolite, hydrophobic silica gel, and hydrophobic metal. If it is talc, it is considered that the surfactant can be removed because it has a property of adsorbing the surfactant, and it has the property of repelling water on the vaporization filter due to its hydrophobic property, and a water film is stretched on the vaporization filter Can prevent airflow obstruction. In the case of activated carbon, it is possible to adsorb and remove surfactants, colored pigments, or odor-causing substances. If it is a high silica zeolite, an odor-causing substance, a surfactant, a mineral component and the like can be adsorbed and removed. When the calcium ions and magnesium ions in the water are adsorbed and removed, it is possible to prevent the scale from depositing on the vaporization filter and reducing the humidification efficiency, so that the lifetime of the vaporization filter can be extended. A high silica zeolite having a silica / alumina ratio of 30 or more is suitable. If it is hydrophobic silica gel, the surfactant can be adsorbed and removed. Here, a known method such as silane treatment can be used as the hydrophobization treatment of the silica gel. Examples of the hydrophobic metal include those in which the surface of silver, copper, zinc, aluminum, nickel or the like is coated with a fatty acid or a resin. When two or more kinds of metals having different oxidation-reduction potentials are supported, an electric field is formed in water, and bacteria and the like are attracted to and adsorbed on the metal surface, so that an effect of preventing reproduction can be expected. In addition, in a humidifying device having a heating means, it is possible to efficiently take in heat generated by the metal from the heating means and transmit it to water, and it is possible to increase the humidification efficiency because water is easily vaporized. it can. When the particle size of the hydrophobic material is 2 to 55 μm, moderate unevenness and pores are formed on the surface of the vaporization filter, and an efficient vaporization filter having a large surface area can be obtained.

  Further, the hydrophobic material is characterized by containing an antibacterial metal, and has an effect that the antibacterial property can be imparted to the vaporizing filter and the generation of microorganisms and molds can be prevented. Examples of the antibacterial metal include silver, copper, zinc, aluminum, and nickel.

  Further, the synthetic resin emulsion is characterized by containing a solid component of 8% or more by weight with respect to the hydrophobic material. By including the solid component of the synthetic resin emulsion in a weight ratio of 8% or more with respect to the hydrophobic material, the adhesive strength of the inorganic material to the substrate is sufficient, and the peeling of the inorganic material from the substrate can be prevented. Have

  In addition, the base material has a three-dimensional network structure, and a large amount of moisture can be retained by the vaporization filter so that air can be efficiently humidified. Moreover, since the surface area of a base material is large and the contact area of the dry air and the water on a vaporization filter increases, humidification efficiency can be improved. Moreover, since the opening is large, it is difficult to cause clogging even when a scale is deposited on the vaporization filter, and the effect of preventing the air passage from being obstructed can be obtained.

  As a base material having a void through which air can pass, there are a shape in which fibers are entangled and a foamed shape. If it is a foam shape, a foam metal, a foam resin, a ceramic foam, etc. are mentioned. For example, urethane foam resin has many air gaps inside, so that it has excellent air permeability and is inexpensive, flexible and easy to process. In the case of a vaporization filter composed of a foam base material, a foaming density of 17 cells / 25 mm or less is suitable if the passing air volume is about 1 m 3 / min and the surface wind speed is about 0.6 m / s. Moreover, since the pressure loss at the time of air passing changes with the thickness of a foam base material and the vaporization efficiency of water increases by the improvement of air permeability, there is an optimal thickness, and the thickness of the foam is 5 to 5. If it is 30 mm, the balance between the strength of the vaporization filter and the vaporization efficiency may be obtained moderately.

  If the honeycomb shape is used, it is possible to efficiently humidify the air because the air permeability is more excellent. Examples of the material include ceramics and metals. Ceramics are excellent in durability under high temperature and high humidity, and are suitable for maintaining quality for a long period of time. In addition, the strength of the honeycomb can be improved by attaching a hydrophobic material to a metal material excellent in strength. For example, when talc is supported on an iron plate honeycomb, the talc is firmly fixed so as to cover the joined portion of the iron plate honeycomb, so that a vaporized filter having higher strength and excellent durability can be obtained.

  Further, the synthetic resin emulsion and colloidal silica are dispersed in a mixed solution of water and alcohol and applied to a substrate. By adding alcohol, the surface tension is reduced and the compatibility with the substrate surface is improved compared to the case of using a liquid dispersed only with water, and the treatment solution is applied to the substrate surface widely and thinly. Can do. Further, since the volatility of the treatment liquid is increased by adding alcohol, the drying time required for immobilization of the treatment liquid on the substrate can be shortened. Moreover, it has the effect of suppressing foaming of the processing liquid. Moreover, the bacteria adhering to the base material at the time of manufacture can be sterilized and cleaned. Moreover, the fats and oils adhering at the time of processing of a base material can be dissolved and removed. In addition, the same effect can be acquired even if polar solvents other than alcohol are used, and what is necessary is just to select a solvent according to the kind of base material.

  In addition, by adding a polar solvent such as alcohol, it is well-suited to a substrate that is not hydrophilic or does not absorb water, and can be applied uniformly. Non-hydrophilic or non-water-absorbing substrates are easy because water does not enter the interior of the substrate and the surface of the substrate is soiled, but the interior of the substrate is not soiled or bacteria are propagated. It can be washed and has the effect of being kept clean.

  The volume mixing ratio of water and alcohol is characterized in that the alcohol is 7 or less with respect to water 1, and the synthetic resin emulsion is treated by setting the polar solvent other than water to 7 or less with respect to water 1. It can be stably present in the liquid and has the effect of preventing gelation.

Further, the vaporization filter according to any of claims 1 to 1 1, a water supply means, a humidifier provided with a blower unit, from the water supply means to the vaporization filter supplied water from the blowing means Humidification is performed by passing dry air. Further, the amount of humidification can be easily controlled by controlling the amount of water and dry air supplied to the vaporizing filter. In addition, by using the vaporization filter of the present invention, effects such as removal of odor-causing substances and surfactants, antibacterial properties, antifungal properties, prevention of scale adhesion, prolonging filter life, and low pressure loss can be obtained.

Further, the vaporization filter according to any of claims 1 to 1 1, a water supply means, and blowing means, in humidifier provided with air heating means, since the drying air to be introduced into the apparatus is heated In addition, the amount of saturated water vapor in the air passing through the vaporizing filter increases, and a higher humidification capacity can be obtained.

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

( Reference form 1)
As shown in FIG. 1 as an example of the cross section of the vaporization filter, the vaporization filter 11 is a tertiary having a void 14 through which air can pass through silica particles 12 dried from colloidal silica and acrylic resin 13 dried from a synthetic resin emulsion. It is fixed to the void 14 or the base material surface 16 of the urethane foam 15 as the base material of the original network structure. The silica particles 12 and the acrylic resin 13 are obtained by applying an emulsion liquid in which colloidal silica and an acrylic monomer are emulsified and dispersed in a solvent in which water and ethanol are mixed, to the urethane foam 15 and drying. Here, since the emulsion liquid is a mixed solvent of water and ethanol, the wettability to the urethane foam 15 is good, and the silica particles 12 and the acrylic resin 13 are uniformly coated.

  As a method of applying the synthetic resin emulsion and colloidal silica to the base material, the synthetic resin emulsion, the colloidal silica, water, and alcohol are mixed in advance at an arbitrary ratio and applied to the base material surface. There are a method and a method of forming a synthetic resin layer on the surface of a substrate and then applying colloidal silica. At this time, polar solvents other than water, such as acetone and ether, may be used instead of alcohol under conditions where the synthetic resin emulsion and colloidal silica can be stably present. It is also possible to shorten the drying time.

  In a method in which a synthetic resin emulsion, colloidal silica, water and alcohol are mixed in advance and applied as a treatment liquid to the substrate surface, the substrate is immersed in the treatment liquid to synthesize silica particles on the substrate surface. A uniform mixed film of resin can be formed. Moreover, the process liquid which mixed colloidal silica, the synthetic resin emulsion, water, and ethanol can also be sprayed with respect to a base material using a spray.

  The method of applying the colloidal silica after forming the synthetic resin layer on the surface of the base material has an advantage that the silica particles can be uniformly supported without being embedded in the synthetic resin. In either method, by arbitrarily adjusting the ratio of the synthetic resin emulsion, water and alcohol, the affinity between the treatment liquid and the substrate can be increased, and the treatment liquid can be uniformly applied to the substrate. Therefore, the surface area of the vaporization filter can be increased, and the humidification efficiency can be improved.

  In addition, since the volume mixing ratio of water and alcohol is 7 or less with respect to water 1 and the polar solvent other than water, the synthetic resin emulsion can be stably present in the treatment liquid, and the treatment liquid is gelled. It can prevent denaturation.

( Reference form 2)
The same parts as those in Reference Embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in an example of a cross section in FIG. 2, the vaporization filter 11 includes a hydrophobic silica gel 17 as a solid particle hydrophobized and provided with a surfactant adsorption ability, and acrylic silica obtained by drying a colloidal silica-containing acrylic resin. The resin 18 is fixed to the void 14 of the urethane foam 15 or the substrate surface 16 as a substrate having a three-dimensional network structure having voids 14 through which air can pass. The hydrophobic silica gel 17 and the acrylic silica resin 18 are obtained by applying an emulsion liquid in which colloidal silica and an acrylic monomer are emulsified and dispersed in a solvent in which water and ethanol are mixed, to the urethane foam 15 and drying. is there. Here, since the emulsion liquid is a mixed solvent of water and ethanol, it has good wettability to the urethane foam 15, and the hydrophobic silica gel 17 and the acrylic silica resin 18 are uniformly coated.

  In the above configuration, when the silica gel is subjected to a hydrophobic treatment, the repulsion between the silica gel and water becomes strong, so that water is repelled from the foamed urethane 15 as a base material, and a water film is formed in the void 14 of the foamed urethane 15. Therefore, a vaporization filter having a large contact area between water and dry air and having a low pressure loss can be provided.

  In addition, since the synthetic resin emulsion contains colloidal silica, the hydrophobic silica gel and colloidal silica are bonded via a silanol group, so higher adhesion strength is obtained and the separation of the hydrophobic silica gel from the substrate is prevented. Has the effect of being able to. In addition, in synthetic resin emulsions containing colloidal silica, fusion is partially inhibited by the colloidal silica on the surface of the synthetic resin particles during drying, resulting in voids surrounded by the colloidal silica. Can be formed. For this reason, the surface area of the vaporization filter can be increased, the contact area of dry air and water is increased, and the effect of increasing the humidification performance by 3 to 14% compared to a synthetic resin emulsion not containing colloidal silica is obtained. It is done.

  In addition, by including the solid component of the synthetic resin emulsion in a weight ratio of 8% or more with respect to the inorganic material, the adhesive strength of the inorganic material to the base material is sufficient, and the effect of preventing the inorganic material from peeling from the base material is obtained. It is done.

(Embodiment 1 )
The same parts as those in Reference Embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in an example of a cross section in FIG. 3, the vaporization filter 11 is made of an acrylic obtained by drying two kinds of metal materials, copper 19 and zinc 20, high silica zeolite 21 as a hydrophobic material, and colloidal silica-containing acrylic resin. The silica resin 18 is fixed to the void 14 or the surface 16 of the urethane foam 15 as a base material having a three-dimensional network structure having voids 14 through which air can pass. Hydrophobic silica gel 17 and acrylic silica resin 18 are applied to urethane foam 15 by applying a treatment liquid in which high silica zeolite 21 is dispersed in an emulsion liquid in which colloidal silica and an acrylic monomer are emulsified and dispersed in a solvent in which water and ethanol are mixed. And obtained by drying. Here, since the emulsion liquid is a mixed solvent of water and ethanol, the wettability to the urethane foam 15 is good, and the high silica zeolite 21 and the acrylic silica resin 18 are uniformly coated.

  In the above configuration, since copper 19 and zinc 20 are antibacterial metals, bacteria and molds can be prevented from breeding in water or on the vaporization filter. At this time, when the copper 19 and the zinc 20 are made conductive, an electric field is formed between the two companies due to the difference in redox potential between the copper 19 and the zinc 20. Since microorganisms in water are often negatively charged, they are attracted to the zinc side by the action of an electric field and then killed by the antibacterial action of zinc. Thus, if two or more kinds of metals having different redox potentials are supported, an electric field is formed in the water, bacteria are attracted to the metal surface, and the activity is suppressed and the effect of preventing reproduction can be obtained. it can. In addition, cationically charged substances such as calcium and magnesium and anionic charged substances such as chlorine can be removed.

(Embodiment 2 )
The same parts as those in Embodiment 1 and Reference Embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. 4 includes a vaporization filter 42, a fan 43 as a blower unit, and a water tank 44 as a water supply unit, and serves as an air heating unit between the vaporization filter 42 and the fan 43. A heater 45 is provided. The dry air 46 taken into the humidifier 41 by the fan 43 is heated by the heater 45 and then comes into contact with the vaporizing filter 42 and passes through. At this time, since the vaporization filter 42 is in a wet state by receiving water 47 from a water tank 44 as water supply means, water is vaporized, and humidified high-humidity air 48 is supplied downstream.

  In the above configuration, humidification can be performed with low power when no heater is used. Further, the amount of humidification can be easily controlled by controlling the rotational speed of the fan.

  Moreover, if the air heating means is used, the saturated vapor pressure increases, so that a higher humidification capability can be obtained. The air heating means does not necessarily have to be a heater, and may be anything that can heat air, such as a halogen lamp.

( Reference example 1) Vaporization filter Colloidal silica-containing acrylic emulsion was diluted 10 times with a solution in which water: isopropyl alcohol was mixed at a volume ratio of 1: 1 to obtain a treatment liquid. The prepared treatment liquid was sprayed on both the front and back surfaces of the polyurethane foam having a three-dimensional network structure. Then, it was made to dry at about 100 degreeC for 20 minute (s), and the vaporization filter of the invention product A was created. Moreover, the thing which does not apply | coat a process liquid was made into the comparative product A.

  The acrylic emulsion and colloidal silica-containing acrylic emulsion are diluted 10-fold with a solution in which water: isopropyl alcohol is mixed at a volume ratio of 1: 1, and high silica zeolite having a silica / alumina ratio of 300 is added thereto and stirred. Was used as a treatment solution. The prepared treatment liquid was sprayed on both the front and back surfaces of the polyurethane foam having a three-dimensional network structure. Then, it was made to dry at about 100 degreeC for 20 minute (s), and the vaporization filter of the comparison product B and the invention product B was created.

  The vaporization filter created in the humidifier shown in FIG. 4 was assembled, and the humidification amount (ml / h) per unit time at 20 ° C. and a humidity of 40% was measured. The humidification performance of each vaporization filter was compared when the value when the polyurethane foam alone was used as the vaporization filter (Comparative Product A) was 100%. The results are shown in Table 1.

  From the comparison between the comparative product A and the invention product A, it can be seen that the humidification performance is improved by applying the treatment liquid. Further, when particles such as high silica zeolite are impregnated, the humidifying performance is improved as compared with Comparative Example A, which is an untreated product. From the comparison between Comparative Product B and Product B, the colloidal silica-containing acrylic emulsion was used. It turns out that humidification performance is good.

( Reference Example 2) Stability of acrylic emulsion The dispersion stability of a treatment liquid in which colloidal silica-containing acrylic emulsion, water and ethanol were mixed at an arbitrary ratio was evaluated. Table 2 shows the dispersion stability by visual evaluation for each blending ratio.

  The volume ratio of ethanol and water was shown in consideration of the amount of water contained in the colloidal silica-containing acrylic emulsion. It was confirmed that when the volume ratio of ethanol and water was 5.7, the dispersion state of the acrylic emulsion was slightly deteriorated, and when it exceeded 7, the treatment liquid was completely gelled.

Example 1 Adhesive Strength between Acrylic Emulsion and Inorganic Material A synthetic resin emulsion was diluted 10 times with a solution in which water: ethanol was mixed at a volume ratio of 1: 4.5, and a hydrophobic material was added thereto. A vaporization filter was prepared by the method of Example 1 with the treatment liquid added at the ratio shown in FIG. Note that zeolite was used as the hydrophobic material, and an acrylic emulsion containing colloidal silica was used as the synthetic resin emulsion. The adhesive strength between the acrylic emulsion and the hydrophobic material was judged by visually confirming the state of peeling of the hydrophobic material when the prepared vaporization filter was lightly rubbed with a finger. Table 3 shows the ratio of the acrylic emulsion solid component to the hydrophobic material and the adhesion state of the hydrophobic material.

  The resin solid component indicates a solid component of the acrylic emulsion. It can be seen that when the acrylic emulsion solid component is less than 8% of the weight of the hydrophobic material, the adhesion of the acrylic emulsion becomes insufficient, and the inorganic material is peeled off.

(Example 2 ) Pressure loss change of vaporization filter Colloidal silica-containing acrylic emulsion was diluted 10 times with a solution in which water: ethanol was mixed at a volume ratio of 1: 4.5, and solid particles were added thereto and stirred. And used as a treatment solution. The prepared treatment liquid was sprayed on both the front and back surfaces of the polyurethane foam having a three-dimensional network structure. Then, it was made to dry for 20 minutes at about 100 degreeC, and the vaporization filter was created. As solid particles, zeolite as hydrophilic porous particles, high silica zeolite as hydrophobic particles, talc, and hydrophobized silica gel were used. FIG. 5 shows pressure loss when water is applied to each of the vaporization filters created and a wind speed of 1 m / s is passed. It can be seen that the pressure loss is 20 to 50% lower when the hydrophobic particles are used than when the hydrophilic porous particles are used.

(Example 3 ) Change in compatibility of treatment liquid to base material by mixing polar solvent Synthetic resin emulsion was diluted 10 times with a solution in which the mixing ratio of water and ethanol was changed, and this was used as a hydrophobic material. It was the added processing solution of the high-silica zeolite mosquitoes. The polyurethane foam having a three-dimensional network structure was sprayed on both sides. Then, it was made to dry for 20 minutes at about 100 degreeC, and the vaporization filter was created. The adhesion state of the material to the created vaporization filter was observed with an electron microscope, and the result is shown in FIG.

  When ethanol was not added (water: ethanol = 1: 0), the familiarity between the treatment liquid and the polyurethane foam was poor, and a part of the treatment liquid was repelled. It can be observed from the photograph of FIG. 6A that the particles are aggregated and adhered onto the vaporization filter. When ethanol was added 0.9 times as much as the water in the solution, there was a tendency to improve although some aggregation of the additive was observed. FIG. 6B shows the state when ethanol is increased to water: ethanol = 1: 3.5. It can be confirmed that the particles are dispersed by increasing the amount of ethanol and can be uniformly applied to the polyurethane foam. In addition, since it will become easy to gelatinize a process liquid when water: ethanol = 1: 7 or more, it is unpreferable.

  The vaporization filter of the present invention has a low pressure loss, can be easily cleaned and kept clean, and does not generate bubbles or a water film even when brought into contact with water. It can also be applied to applications such as humidifiers and air conditioners for industrial use, commercial use or industrial use.

Schematic sectional view of the vaporization filter of Reference form 1 Schematic sectional view of the vaporization filter of Reference form 2 Schematic sectional view of the vaporization filter of the first embodiment Schematic cross-sectional view of a humidifier according to Embodiment 2 The figure which shows the pressure loss change of the vaporization filter of Example 2. FIG. Photomicrograph of Example 3 ((a) Micrograph of water: ethanol = 1: 0, (b) Micrograph of water: ethanol = 1: 3.5) Schematic perspective view of conventional humidifier Sectional view of a conventional vaporization filter attached to a water tank

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Evaporation filter 12 Silica particle 13 Acrylic resin 14 Space | gap 15 Urethane foam 16 Base material surface 17 Hydrophobic silica gel 18 Acrylic silica resin 19 Copper 20 Zinc 21 High silica zeolite 41 Humidifier 42 Evaporation filter 43 Fan 44 Water tank 45 Heater 46 Dry air 47 Water 48 High-humidity air 101 Vaporization filter 102 Water tank 103 Fan 201 Vaporization filter 202 Water tank

Claims (13)

The treatment liquid containing a hydrophobic material and a synthetic resin emulsion and colloidal silica, vapor filter you characterized in that air is applied to a substrate having voids capable of passing. Vaporization filter according to claim 1 Symbol placement, wherein the particle size of the colloidal silica is less than or equal 1/3 of the particle diameter of the synthetic resin emulsion. The vaporization filter according to claim 1 or 2 , wherein the hydrophobic material is immobilized on a base material having a void through which air can pass through a synthetic resin and colloidal silica. The vaporization filter according to any one of claims 1 to 3, wherein the hydrophobic material is obtained by subjecting solid particles to a hydrophobic treatment. The vaporization filter according to claim 4 , wherein the hydrophobization treatment method is silane treatment. Hydrophobic material is talc, activated carbon, high-silica zeolite, hydrophobic silica, vaporization filter according to any claims 1 to 5, characterized in that any one or more selected from a hydrophobic metal. Vaporization filter according to any one of claims 1 to 6 hydrophobic material, characterized in that it comprises an antimicrobial metal. The vaporization filter according to any one of claims 1 to 7 , wherein the synthetic resin emulsion contains a solid component having a weight ratio of 8% or more with respect to the hydrophobic material. The vaporization filter according to any one of claims 1 to 8, wherein the base material has a three-dimensional network structure. The vaporization filter according to any one of claims 1 to 9, wherein the synthetic resin emulsion and colloidal silica are dispersed in a mixed solution of water and alcohol and applied to a substrate. Volume mixing ratio of water and alcohol, vaporization filter according to claim 1 0, wherein the alcohol of 7 or less in water 1. Vaporization filter according to any one of claims 1 to 1 1, a water supply means, and a blowing means, the water supplied to the vaporizing filter by said water supply means, air to the vaporizing filter by said air blowing means Humidifying device that blows air and humidifies. A vaporization filter according to any one of claims 1 to 11, a water supply means, a blower means, and an air heating means, wherein water is supplied to the vaporization filter by the water supply means, and the blower means is used. The humidifier which heats the air sent by the said vaporization filter with the said air heating means, and humidifies.

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