JP2011196601A - Vaporization filter for humidification - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vaporization filter for humidification having high humidifying performance regardless of its compact size.SOLUTION: This vaporization filter for humidification is layered aggregate of single-faced corrugated board made of a water-absorbing filter element including an antibacterial and an antifungal agent, and a glue pattern of the single-faced corrugated board is bent in a meandering manner. As a ventilation flue is bent in a meandering manner, contact efficiency of the water-absorbing filter element and the passing air is increased, and high humidification amount can be achieved. Accordingly, as the appropriate humidification amount can be obtained even by the vaporization filter for humidification designed compact, the vaporization filter can be applied not only to a humidification device but also to various air conditioning products (air cleaner and the like) with a humidifying function, limited in space for the humidifying function.

Description

  The present invention relates to a vaporizing filter for humidification.

  In the winter when the air is dry, humidifiers are used to increase the relative humidity in the room. As humidification systems for the humidifier, (1) an ultrasonic system that emits water in the form of a mist with ultrasonic waves, (2) a steam system that heats and evaporates water, and (3) a water-absorbing member (a vaporizing filter for humidification) : Evaporation method that water is naturally contained by adding water to (usually subjected to antibacterial and antifungal treatment) and ventilating water is mainly used.

  Ultrasonic and steam humidifiers directly release water and water vapor into the air, so that a high amount of humidification can be obtained with a relatively small device. However, on the other hand, for ultrasonic humidifiers, impurities such as calcium and magnesium in the water, germs, etc. are also released into the air at the same time, so there is a problem in terms of hygiene, and even for steam humidifiers, There are problems such as high power consumption and fear of burns due to high temperature water or steam.

  The vaporization type humidifier can solve the above-mentioned problems of the ultrasonic type and steam type humidifiers, but since it is a mild humidification type, in order to obtain a desired humidification amount, a vaporization filter for humidification is used. Need to be enlarged.

  Nowadays, it is widely recognized that indoor humidification in winter has a certain effect on prevention of influenza, colds, etc. In addition to dedicated humidifiers, various air-conditioning products with humidification functions, especially humidification The need for air cleaners with functions is growing rapidly.

  For example, the main main functions of an air cleaner are deodorization and collection, and a filter or device for expressing the functions must occupy a certain space in the housing, and is provided with a humidifying function. There is a limited space available Such restrictions also apply to air-conditioning products other than air purifiers.

  Although there is a merit in humidification by the vaporization method, there is a problem that the apparatus becomes large because a corresponding space is required for the vaporization filter for humidification, and high-performance humidification that can obtain the desired humidification amount in a compact size Development of a vaporization filter is awaited.

  In order to solve the problem, a vaporizing filter for humidification with an increased humidification amount by sequentially laminating a flat filter medium and a wave-shaped filter medium and increasing a filter medium area per unit volume is disclosed (for example, , See Patent Document 1). However, the humidification vaporization filter of Patent Document 1 also has a limit to the amount of humidification, and the number of layers that can be filled is limited, considering the air resistance during ventilation.

  Therefore, a structure in which a flat filter medium and a corrugated filter medium are line-bonded and integrated by thermal fusion at the peak of the peak of the corrugated filter medium has an angle in the line bonding direction of the structure. A humidifying vaporization filter laminated so as to be in a range of 5 to 25 ° with respect to the inflow direction is disclosed (for example, see Patent Document 2). By adopting such a shape, the effect of increasing the amount of humidification can be expected, but the effect is small when the angle is small. On the other hand, in the case of a large angle, the air resistance at the time of ventilation increases, and the effect is reduced by the decrease in the air volume resulting from the increase. Therefore, the increase in the humidification amount as expected cannot be expected.

JP-A-8-159526 JP 2005-37076 A

  The problem to be solved by the present invention is to provide a vaporizing filter for humidification having high humidification performance despite its compact size.

  As a result of intensive studies to solve the above problems, the inventors have invented the following vaporizing filter for humidification.

  A humidifying vaporization filter comprising a laminated assembly of single-sided corrugated cardboard made of a water-absorbing filter medium containing an antibacterial agent and an antifungal agent, wherein the glue pattern of the single-sided cardboard is bent in a meandering manner.

  Glue pattern consisting of water-absorbing filter material containing antibacterial and antifungal agent is bent in a meandering manner in a vaporizing filter for humidification that humidifies by adding water and ventilating it to naturally evaporate the water It is a laminated assembly of single-sided corrugated cardboard. Since the ventilation path is bent in a meandering manner, the contact efficiency between the water-absorbing filter medium and the passing air is increased, and a high humidification amount can be obtained. Therefore, even if it is a vaporizing filter for humidification with a compact design, it is possible to obtain a corresponding amount of humidification. It can be used for air conditioning products (air purifiers, etc.).

It is a schematic diagram which shows an example of the single-sided cardboard which the glue pattern which comprises the vaporization filter for humidification of this invention bent in the meandering form. It is a schematic diagram which shows an example of the usage condition of the vaporization filter for humidification of this invention.

  Below, the component concerning the vaporization filter for humidification of this invention is demonstrated in detail.

  The water-absorbing filter medium according to the present invention comprises a base material carrying an antibacterial agent and an antifungal agent, and if necessary, a hydrophilic agent, and has a water absorption property required for a vaporizing filter for humidification. Used as a single-sided cardboard core and liner constituting the vaporization filter. In the case of a vaporization type filter, the standard of water absorption required for the water-absorbing filter material constituting the filter is JIS-L-1907: 2004 “Water absorption test method for textile products” 7.1.2 “Bilec method” According to the above, the lower end 10 mm of the test piece is immersed in water, and after 10 minutes, the water suction height from the water surface is 80 to 120 mm. The suction height is a measured value in a direction that is a water absorption direction when the humidifying vaporization filter is used.

  There is no particular limitation on the base material of the water-absorbing filter medium, but in order to obtain the above water-absorbing property, a porous sheet material having an appropriate void in the base material is preferable. Specifically, urethane foam, woven fabric, A knitted fabric, a nonwoven fabric, etc. are mentioned, From these, it can select suitably or it can use in combination of multiple. Among these, a nonwoven fabric is a particularly preferable substrate because it is easy to control various conditions such as fiber blending, basis weight, thickness, and the like, and it is easy to impart functions and complex by post-processing.

  The fiber constituting the nonwoven fabric is not particularly limited as long as it does not impair water absorption or processability to single-sided corrugated cardboard described later, polyester fiber, acrylic fiber, polyvinyl alcohol fiber, polyamide fiber, rayon system. General-purpose organic fibers such as fibers, engineering plastic fibers such as aromatic polyamide fibers and wholly aromatic polyester fibers, inorganic fibers such as glass fibers, carbon fibers and ceramic fibers, and natural fibers such as wood pulp, hemp pulp and cotton linter pulp Such materials can be widely used.

  Examples of the method for producing the nonwoven fabric include a spunbond method, a melt blow method, a thermal bond method, a needle punch method, a spunlace method, a stitch bond method, a wet papermaking method, and the like. . A plurality of methods may be combined as necessary.

  Further, for the purpose of improving the contact efficiency between the water-absorbing filter medium and air, the substrate may be subjected to a hole opening treatment. Examples of the hole opening method include a method of melting with a hot needle, a method of mechanically opening holes by punching, and a spunlace method. Opening by the spunlace method is a method in which a plain base material is loaded on a mesh with a high knuckle, and a high-pressure water stream is jetted to make fibers unevenly distributed.

  Since the humidifying vaporization filter of the present invention is used in a wet state at all times, it may become a hotbed of various germs and sputum when used over time, so it is necessary to carry an antibacterial agent and a fungicide on the base material. Antibacterial and antifungal agents include benzimidazole-based, isothiazoline-based, pyrithione-based, organic copper-based, organic iodine-based antibacterial / antifungal agents, inorganic antibacterial agents mainly composed of calcium phosphates such as hydroxyapatite, A material such as a composite antibacterial agent in which an antibacterial metal ion such as silver is supported on a carrier such as zeolite can be appropriately selected or used in combination.

  As a method for supporting the antibacterial agent and the antifungal agent on the base material, for example, an aqueous emulsion of a thermoplastic resin is mixed with the antibacterial agent and the antifungal agent, and various blade coaters, air knife coaters, bar coaters, rod blade coaters, shorts, etc. Examples include a method of coating and supporting on a substrate using various coating apparatuses such as a dwell coater, a die coater, a comma coater, a reverse roll coater, a kiss coater, a dip coater, a curtain coater, an extrusion coater, a micro gravure coater, and a size press. .

  The aqueous emulsion of the thermoplastic resin referred to here is a thermoplastic polymer dispersed in water, and the polymer component includes an acrylic resin, a styrene-acrylic copolymer, and a styrene-butadiene copolymer. And ethylene-vinyl acetate copolymer.

  In addition, for the purpose of improving the water absorption of the water-absorbing filter medium, a hydrophilic agent such as silica gel, colloidal silica, vapor phase silica, or wet silica may be used in combination as necessary.

  The humidifying vaporization filter of the present invention uses the water-absorbing filter medium obtained in this way as a medium shin and liner, and produces a single-sided cardboard according to JIS-Z-1516: 2003 “Exterior Corrugated Cardboard”, It is produced by forming an assembly in which single-sided cardboard is laminated. As shown in FIG. 1, the important point in the present invention is a laminated assembly of single-sided cardboards 14 composed of a central core 11 and a liner 12, and the single-sided cardboard 14 is a glue pattern (center line) 1 bent in a meandering manner. Further, it has a step top (center line) 2 bent in a meandering manner, and the formed ventilation path 13 is bent in a meandering manner.

  In an ordinary single-sided corrugated cardboard laminated assembly having a linear glue pattern, the formed ventilation path is linear, and due to its excellent rectifying effect, the contact efficiency between the water-absorbing filter medium and air is poor, and the water absorption There is a problem that a filter having a humidification amount corresponding to the use area of the filter medium cannot be obtained. In order to solve such problems, increase the thickness of the filter in the ventilation direction to increase the contact time with air, decrease the step height of single-sided cardboard and increase the surface area of the water-absorbing filter medium (point of contact with air It is possible to increase the efficiency of contact with air by means such as increasing the air flow), but when these measures are taken, the reduction in the air volume due to the increase in the ventilation resistance of the filter is inevitable and as expected The amount of humidification cannot be increased.

  As a method of obtaining a filter with improved contact efficiency between the water-absorbing filter medium and air while suppressing an increase in the airflow resistance of the filter, a normal angle of the single-sided corrugated cardboard with a linear glue pattern has a certain angle with respect to the ventilation direction. Thus, it has been proposed to form a laminated body. However, when the angle is small, the effect of increasing the humidification amount is small. On the other hand, when the angle is large, the air retention becomes strong and the ventilation resistance of the filter increases, so that the humidification amount cannot be increased as described above. .

  The humidifying vaporization filter of the present invention has a ventilation path composed of continuous holes bent in a meandering manner, and since there is no linear portion in the ventilation path, the efficiency of contact with air can be increased efficiently. . In addition, since no large stagnation of air occurs and the increase in ventilation resistance of the filter is small, the above series of problems can be solved, and a compact filter having a high humidification amount can be provided.

  In the humidification vaporization filter of the present invention, there is no particular limitation on the relationship (L / D) between the thickness in the ventilation direction of the filter (D, reference numeral 3 in FIG. 1) and the length (L) of the center line of the glue pattern, What is necessary is just to select suitably according to a desired characteristic (humidification amount, ventilation resistance). However, as the L / D increases, the contact efficiency between the water-absorbing filter medium and air increases, but the ventilation resistance also increases. Therefore, the L / D is preferably set to 1.1 or less.

  FIG. 2 shows an example of the usage pattern of the humidifying vaporization filter 4 of the present invention. The filter absorbs water in the submerged portion 5, and the water rises along the water absorption direction 6. When the dried air 7 flows through the ventilation path bent in a meandering manner along the ventilation direction 9, the humidified air 8 can be obtained efficiently.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to this Example.

Example 1
[Production of substrate]
Polyester fiber (fiber diameter: 0.6 dtex, fiber length: 5 mm) 40 mass%, polyester binder fiber (fiber diameter: 2.2 dtex, fiber length: 5 mm) 40 mass%, softwood bleached kraft pulp (NBKP, unbeaten product) ) 20% by mass was dispersed and mixed in water, and a substrate having a basis weight of 100 g / m ² was prepared using a circular net paper machine.

[Production of water-absorbing filter medium]
Size using a press coating machine, to the substrate, as an antibacterial antifungal agent, was 3 g / m ² impregnated bearing zinc pyrithione, then to produce a water-absorbing filter media to dry. According to JIS-L-1907: 2004 “Water Absorption Test Method for Textile Products” 7.1.2 “Bilec Method”, the flow direction of the water absorbent filter medium (the water absorption direction when used as a vaporizing filter for humidification) ), The lower end of 10 mm was immersed in water, and the suction height of water from the water surface after 10 minutes was measured. As a result, the suction height was 130 mm, and the water absorption was sufficient.

[Production of single-sided cardboard]
In accordance with JIS-Z-1516: 2003 “Exterior Corrugated Cardboard”, the above-mentioned water-absorbing filter medium is used for medium shin and liner, and the group pitch is 5 mm, the height is 3 mm, and the L / D is about 1.02. A single-sided cardboard having a pattern bent in a serpentine shape was produced. An acrylic binder resin was used for bonding the top of the middle shin and the liner.

[Preparation of vaporizing filter for humidification]
The single-sided cardboard was cut into a flow direction = 115 mm and a width direction = 70 mm, and 80 pieces of the cut pieces were laminated. Next, the periphery of the laminated assembly was wound once with the above water-absorbing filter medium and fixed with a hot-melt adhesive to produce a humidification vaporization filter of Example 1. In addition, 80 pieces of cut pieces were only laminated, and were not adhered to each other.

Example 2
A humidification vaporization filter of Example 2 was produced in the same manner as in Example 1 except that L / D = about 1.05.

Example 3
A humidification vaporization filter of Example 3 was produced in the same manner as in Example 1 except that L / D = about 1.08.

Comparative Example 1
A humidifying vaporization filter of Comparative Example 1 was produced in the same manner as in Example 1 except that the glue pattern was linear (L / D = 1).

Comparative Example 2
Except for the point that the glue pattern is linear and the point that the single-sided cardboard is cut so that the angle of the glue pattern is 12 ° with respect to the ventilation direction (L / D = about 1.02), the same as in Example 1. The humidification vaporization filter of Comparative Example 2 was produced by the method described above.

  As described above, the humidification vapor filters obtained in Examples and Comparative Examples were tested by the following methods and evaluated for their performance.

[Pressure loss]
According to JIS-B-9908: 2001 “Performance Test Method for Ventilation Air Filter Unit / Ventilation Electric Dust Collector” Format 1, humidification of examples and comparative examples under air flow conditions of 2.5 m ³ / min The pressure loss (Pa) of the industrial vaporization filter was measured and used as an index of ventilation resistance.

[Humidification performance]
A commercially available humidifier (Mitsubishi Electric Corp., vaporizing humidifier, product number: SV-KK606) is equipped with the vaporizing filters for humidification of Examples and Comparative Examples, and constant temperature and humidity conditions (20 ° C, relative humidity 30%). Was operated in the mode “continuous (strong)”. One hour after the start of operation, the amount of water decrease in the humidifier water tank was measured, and the amount of decrease (cc / hour) was used as an indicator of humidification performance.

  Table 1 shows the evaluation results of the above test items. As for the humidification vaporization filter of the example, the humidification performance could be improved efficiently without greatly increasing the airflow resistance.

  Since the humidification vaporization filter of the present invention can obtain a high humidification amount even in a compact size, it can be used not only for a humidifier but also for a humidification function-equipped type in which the space that can be broken for the addition of the humidification function is limited. It can be used for various air-conditioning products (such as air purifiers).

1 Glue pattern bent in a serpentine shape (center line)
2 Steps bent in a serpentine shape (center line)
3 Thickness in ventilation direction 4 Vaporizing filter for humidification 5 Submerged portion 6 Water absorption direction 7 Dry air 8 Humidified air 9 Ventilation direction 11 Medium shin 12 Liner 13 Ventilation path 14 Single-sided cardboard

Claims (1)

  A humidifying vaporization filter comprising a laminated assembly of single-sided corrugated cardboard made of a water-absorbing filter medium containing an antibacterial agent and an antifungal agent, wherein the glue pattern of the single-sided cardboard is bent in a meandering manner.

Images