JP2009243703A - Filter and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter for an evaporative humidifier or a cold air device and its manufacturing method, for improving water retentivity, reducing running costs by reducing the water supply amount and improving humidifying or cooling efficiency. <P>SOLUTION: In this filter 10 of the evaporative humidifier 50 for humidifying the air by evaporating the moisture supplied to the filter by allowing the air to pass through the air-permeable filter, pile 17 for retaining the supplied moisture 27 is planted on at least a part of a base material 15, thus the evaporating efficiency of the supplied moisture is improved, and humidifying efficiency is improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a filter for a vaporizing humidifier or a cooler and a method for manufacturing the same, and more particularly to a filter capable of efficiently humidifying or cooling air passing through the filter and a method for manufacturing the same.

  As a vaporizing humidifier or a cool air cooler, there is one in which air is passed through a filter having air permeability, and moisture supplied to the filter is evaporated to humidify or cool the air.

Patent Document 1 discloses an example of this type of vaporizing humidifier.
JP 7-318117 A

  By the way, as a filter of the vaporizing humidifier or the cool air cooler, a filter formed by depositing fibers made of, for example, polyvinyl chloride (PVC) in a nonwoven fabric shape is used. Since such a mat has poor water retention, the flow rate of water supplied by the watering means is large, and it cannot be said that the efficiency of humidification or cooling is good, and it is disadvantageous in terms of costs such as electricity and water charges. There was a need for improvement.

  The present invention has been made in view of the above-mentioned problems, and the object thereof is to improve water retention, reduce the amount of water supply, reduce running costs, and improve humidification or cooling efficiency. It is providing the filter of a vaporization humidifier or a cool air fan, and its manufacturing method.

In order to achieve the above object, the present invention is a filter of a vaporizing humidifier in which air is passed through a filter having air permeability, and moisture supplied to the filter is evaporated to humidify the air. A large number of fine protrusions for holding the supplied water are formed on at least a part of the base material.
The present invention also relates to a filter for a cool air cooler in which air is circulated through a filter having air permeability and the water supplied to the filter is evaporated to cool the air, and at least one of the base materials thereof. A large number of fine protrusions for holding the supplied water are formed on the part.

  Furthermore, the filter of the present invention is characterized in that the fine protrusions are cilia-like formed by flocking or raising. Furthermore, the filter of the present invention is characterized in that the fine protrusions are bonded to the base material via a self-extinguishing adhesive. Furthermore, the filter of the present invention is characterized in that the fine protrusions are flocked fibers formed by electrostatic flocking. Furthermore, the filter of the present invention is characterized in that the pile is a rayon pile. Furthermore, the filter of the present invention is characterized in that the base material is a mat-like material composed of fibers, and the dense and sparse portions of the fibers are dispersedly arranged.

  In addition, the method for producing a filter of the present invention includes a step of providing an adhesive layer on the surface of the base material, and a step of attracting a number of short flocked fibers onto the adhesive layer by electrostatic attraction to plant the hair. Characterized by

  ADVANTAGE OF THE INVENTION According to this invention, the water retention of the filter of a vaporization humidifier or a cool air fan can be improved, the amount of water supply can be reduced, a running cost can be reduced, and the humidification or cooling efficiency of a vaporization humidifier or a cold air fan can be improved. Can be achieved.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 1 is an enlarged schematic view showing a part of the surface of a filter according to the present invention.

The filter 10 shown in FIG. 1 is formed in a mat shape in a nonwoven fabric state by entwining fibers or the like, but generally comprises a plurality of columns 11, and each column 11 has a dense portion. 12 and the sparse portion 13 are alternately arranged one above the other. The dense portion 12 and the sparse portion 13 each have a rectangular shape with a vertical dimension of about 10 mm and a horizontal dimension of about 20 mm. The adjacent columns 11 are connected and arranged, but are slightly shifted up and down (about 5 mm) so that the dense portions 12 do not adjoin each other. The specific gravity of the filter 10 is about 0.025 g / cm ³ . The dots and thick lines displayed in black schematically show the flow of water and the dripping state.

  Since the filter 10 shown in FIG. 1 is divided into a sparse part and a dense part, the pressure loss of the entire air passing through the filter 10 is lower than that not having such a structure. In this example, the pressure loss is reduced to about 4 Pa at a wind speed of 1.5 m / sec. Accordingly, the resistance to air suction is reduced, and an increase in the amount of air sucked can be expected.

  FIG. 2 is an enlarged view schematically showing a part of the fibers of the filter shown in FIG. 1, FIG. 2 (a) is a view showing one fiber, and FIG. 2 (b) is a fiber shown in FIG. FIG. 2C is a diagram further enlarging the portion B of FIG. 2A.

  Each fiber 15 has a uniform cross section and extends long and uses PVC (polyvinyl chloride) as a base material. The fiber 15 has a circular cross section as shown in FIG. 2B, and an adhesive layer 16 is formed on the surface thereof by dipping, coating, spraying, or the like. A large number of piles, that is, flocked fibers 17 are implanted on the surface of the fibers 15 to which the adhesive layer 16 is applied. As the flocked fiber 17, for example, a rayon pile that is a pile having hydrophilicity (a property capable of maintaining the ability to retain water even after repeated use) can be used.

  Planting of the flocked fibers 17 onto the surface of the fibers 15 can be performed by an electrostatic flocking method. When the fiber 15 provided with the adhesive layer 16 is passed through an electrostatic field, the innumerable flocked fibers 17 released in the electrostatic field are perpendicular to the surface of the fiber 15 like a needle by electrostatic attraction in the electric field. The adhesive layer 16 is pierced while crossing and orderly. By drying the adhesive layer 16, the flocked fibers 17 are firmly fixed to the surface of the fibers 15. The adhesive layer 16 can be made of an appropriate adhesive such as acrylic, urethane, epoxy, or vinyl acetate. Accordingly, the surface of the fibers 15 is evenly grown, and when water is supplied to the filter 10 by watering or the like, the fine particles of water straddle between the flocked fibers 17 or several flocked fibers 17. Held.

  The filter 10 is manufactured using an intermediate material in which the fibers 15 are formed into a flat and long strip-like nonwoven fabric having a width of about 1.3 m and a length of about 10 m, for example. Such an intermediate material is handled, for example, wound in a roll shape in the length direction. An existing electrostatic flocking device that performs electrostatic flocking on the intermediate material can be used. Therefore, the cost required for production equipment can be reduced. In the present embodiment, a high DC voltage is applied between the electrodes 18a and 18b in the high voltage generator 18 shown in FIG. 3, and countless flocked fibers 17 from the flocked fiber spraying device 19a are placed between the electrodes 18a and 18b. The electric field E is scattered. The flocked fibers 17 are aligned in parallel by electrostatic attraction along the electric field due to the Coulomb force, and pierce the adhesive layer 16 on the surface of the fiber 15 previously applied by the adhesive application device 19b. In such a manufacturing method, innumerable flocked fibers 17 can be planted on the surface of the fibers 15 in a very easy and orderly manner, so that productivity is very high.

  By implanting a large number of flocked fibers 17 on the surface of the fiber 15, water fine particles are very easily held on the surface of the fiber 15. This particulate water easily evaporates, and the amount of humidified air passing through the filter 10 or the amount of latent heat taken away from the air is dramatically improved. Therefore, the passing air can be sufficiently humidified or cooled. Further, by masking the intermediate material, the adhesive layer 16 is partially formed on the intermediate material, so that when the intermediate material passes through the electrostatic field, the flocked fiber 17 is applied to the flocked fiber 17. It can be attached only to the fibers 15 in the formed region. In this way, by performing electrostatic flocking only on the necessary portion of the filter 10, the amount of flocked fibers 17 and the adhesive used can be reduced, and the cost can be reduced.

  FIG. 4 is an explanatory view schematically showing the flow of water in the filter according to the present invention.

  The water 27 sprinkled on the upper end of the filter 10 flows meandering when flowing through the dense portion 12 and spontaneously falls as water droplets when reaching the sparse portion 13. The water 27 dropped from the sparse portion 13 and reached the dense portion 12 below spreads laterally by colliding with or staying in the fibers of the dense portion 12, and the diffused water is combined with other diffused moisture. The dense portion 12 meanders and flows. Water 27 that has flowed down to the lower end without evaporating is discharged from the lower end. Each time the water 27 flows down the dense portion 12 and the sparse portion 13, the above process of meandering in the dense portion 12, natural fall in the sparse portion 13, and collision / diffusion when reaching the dense portion 12 is repeated.

  The water flowing down from the upper end of the filter 10 is retained in the form of fine particles by the flocking in the region where flocking is applied while flowing down the dense portion 12 or the sparse portion 13. As a result, the evaporation of the water 27 is promoted in that region, and the air passing therethrough can be efficiently humidified or cooled.

  FIG. 5 is a perspective view showing an embodiment of a vaporizing humidifier equipped with the filter of the present invention. The vaporizing humidifier 50 has a sprinkler 51 above the filter 10, and drops water 27 from the sprinkler 51. When the fan 52 is rotated, the air flows from left to right in FIG. 5 and is humidified when passing through the filter 10. A surplus water recovery unit 53 is installed below the filter 10.

  Here, since the pile of the fiber is planted in the filter 10 as described above, water can be efficiently held and a higher vaporizing and humidifying effect can be obtained. In addition, an experiment was conducted to confirm the difference in the effect between when air was passed through a mat with fibers implanted with rayon piles and when air was passed through a mat without fibers implanted with rayon piles. As a result, the results were as follows.

When the mat inlet temperature was 43 ° C. and the humidity was 26% RH, the mat outlet temperature and humidity during running water were as follows.
No flocking ⇒ Temperature 38 ℃, humidity 39% RH, wind speed 1.4m / sec
With flocking ⇒ Temperature 33 ℃, humidity 60% RH, wind speed 1.2m / sec
Thus, it can be seen that when there is flocking, there is a difference in cooling effect of −5 ° C. in temperature and 21% in humidity compared with no flocking.

On the other hand, the water evaporation amount with respect to the water supply amount 22.5 L / h was as follows.
No flocking ⇒ Evaporation amount 8.2L / h (evaporation efficiency 37%)
With flocking ⇒ Evaporation amount 14.4L / h (evaporation efficiency 64%)
Thus, it can be seen that in the case of flocking, the evaporation efficiency is higher than in the case of no flocking.

  The filter 10 described above is an example of a mat in which a fiber is rayon piled. In addition to this, a pile having good hydrophilicity is repeatedly planted on a base material, and water is retained by planting the pile. It is possible to obtain a higher evaporation efficiency than when not. For example, there are a case where several layers of a wire mesh are stacked and a pile is planted on the wire mesh, or a case where a pile is planted on the honeycomb element. In this case, the entire filter needs to be ventilated, and it is important that the pile to be planted is repeatedly hydrophilic. As the pile in this case, for example, a rayon pile can be used. As a method of flocking, for example, the electrostatic flocking method described above can be applied.

In addition, in FIG. 5, water spraying to the filter 10 shows water spraying from the upper end, but in addition to this, a method of spraying the entire ventilation surface of the filter 10 by spray-type watering can also be used. In this case, since the entire filter 10 is quickly wetted, the effect of humidification or cooling can be obtained quickly. In the above embodiment, a sparse part and a dense part are dispersedly arranged as a base material. Although the case where a mat having a structure is used has been described, the present invention is not limited to such a structure, and a mat having a uniform density may be used. Moreover, you may form the fine processus | protrusion formed in a filter by methods other than flocking, for example, raising. Further, the fine protrusion does not necessarily have to be formed on the entire filter, and may be formed only on a part thereof. Moreover, safety | security can be improved by adhere | attaching the flocked fiber to the base material of a filter through the self-extinguishing (flame retardant) adhesive agent. Furthermore, although the said embodiment demonstrated the case where this invention was applied to the filter of a vaporization humidifier, this invention can also be applied to the filter of a cool air cooler. In addition, various modifications can be made to the above-described embodiment without departing from the gist of the present invention.

It is a front view which expands and shows a part of surface of the filter by this invention. It is a schematic diagram which expands and shows a part of fiber which comprises the filter shown in FIG. It is the schematic which shows an example of an electrostatic flocking apparatus. It is a schematic diagram which shows an example of the flow of the cooling water of the filter by this invention. It is a perspective view which shows one Embodiment of the humidifier equipped with the filter of this invention.

Explanation of symbols

10 Filter 11 Column 12 Dense part 13 Sparse part 15 Fiber 16 Adhesive layer 17 Flocked fiber (linear protrusion)
18 High voltage generator 18a, 18b Electrode 19a Flocked fiber spraying device 19b Adhesive application device 27 Cooling water 51 Sprinkler 52 Fan

Claims (8)

A vaporizing humidifier filter in which air is passed through a filter having air permeability, and moisture supplied to the filter is evaporated to humidify the air.
A filter characterized in that a large number of fine protrusions for holding supplied water are formed on at least a part of the base material. A filter for a cool air cooler that circulates air through a filter having air permeability, evaporates water supplied to the filter, and cools the air.
A filter characterized in that a large number of fine protrusions for holding supplied water are formed on at least a part of the base material.   The filter according to claim 1 or 2, wherein the fine protrusions are cilia-like formed by flocking or raising.   The filter according to claim 3, wherein the fine protrusions are bonded to the base material through a self-extinguishing adhesive.   The filter according to claim 3 or 4, wherein the fine protrusions are made of flocked fibers formed by electrostatic flocking.   The filter according to claim 5, wherein the flocked fiber is a rayon pile.   The filter according to any one of claims 1 to 6, wherein the base material is a mat-like material made of fibers, in which dense portions and sparse portions of the fibers are dispersedly arranged. .   The method for producing a filter according to claim 5, wherein a step of providing an adhesive layer on the surface of the base material, and a step of attracting a large number of short flocked fibers onto the adhesive layer by electrostatic attraction action and flocking the hair. A manufacturing method of a filter characterized by including.

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