JP2005083590A - Humidifying filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a humidifying filter having high ventilating performance in the ventilating direction for humidification, and high water absorbing performance for absorbing the water from a lower part. <P>SOLUTION: This humidifying filter comprises a ventilating sheet layer 2 formed by stacking a plurality of ventilating sheets 1 respectively formed by integrally overlapping a corrugated sheet to a plate-shaped sheet in a state that a number of ventilation through passages 6 are formed in the same direction, and water absorbing sheets 3 mounted every specific number of ventilation sheets 1 in the ventilating sheet layer 2. The water absorbing sheets 3 are respectively mounted every 3-15 sheets of ventilating sheets 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a humidifying filter that purifies air to be blown and humidifies the air by containing vaporized water.

Some conventional humidifiers boil water with a heater and convert it into water vapor and discharge it. However, this humidifier has a problem in that the power consumption of the heater is large and the humidifier is excessively humidified.
Therefore, a fan, a saucer (tank), and a humidifying filter are provided in the housing, and water accumulated in the saucer is sucked into the humidifying filter, or water is dripped from an upper tank, and vaporized water is generated by the air flow from the fan. A humidifier that discharges (water vapor) is drawing attention.

As a conventional humidifying filter, as shown in FIG. 5, there is a filter that has a folding screen shape (zigzag bent shape) as a whole (see, for example, Patent Document 1).
However, as shown in FIG. 5, this filter has a large passage resistance of the air flow (in the direction of arrow E) and is not suitable for efficiently supplying moist air (air).

Further, as shown in FIG. 6, a filter in which a corrugated sheet 42 is stacked on a plate-like sheet 41 to form a single air-permeable sheet 43, and a plurality of the air-permeable sheets 43 are laminated.
This filter has good air permeability in the direction of arrow F, but in manufacturing the ventilation sheet 43, the troughs of the corrugated sheet 42 and the plate-like sheet 41 are pressed, and the sheets 41 and 42 are intermittently crushed and the cross section In addition, since the water-resistant adhesive 44 is interposed, the water absorption performance (penetration) in the direction of arrow G is very poor.
JP 2001-235193 A (FIG. 7)

  The problem to be solved is that the water passing performance and the water absorbing performance cannot be satisfied at the same time.

The present invention provides a ventilation sheet layer in which a plurality of ventilation sheets each having a corrugated sheet integrated with a plate-like sheet are laminated to form a plurality of ventilation penetration paths in one direction, and a predetermined number of the above-mentioned in the ventilation sheet layer And a water absorbing sheet interposed for each ventilation sheet.
Further, the water absorbent sheet is configured by laminating a corrugated sheet on a plate-like sheet, and the corrugated direction of the vent sheet of the vent sheet layer and the corrugated direction of the water absorbent sheet are rotated by 90 °. The orientation is different. Alternatively, the water absorbent sheet is a nonwoven sheet having a thickness of 2 mm to 4 mm.
Moreover, the said water absorbing sheet is interposed for every 3-15 said ventilation sheet.

The humidifying filter of the present invention can purify the air to be passed, has good ventilation performance in the ventilation direction for humidification by a large number of ventilation through passages, and excellent water absorption performance of sucking water from the bottom by the water absorbing sheet ing. That is, it can be set as the humidification filter provided with both ventilation performance and water absorption performance.
Moreover, since it is the structure where the ventilation sheet | seat which has a corrugated sheet | seat was laminated | stacked, a surface area becomes large, water retention performance can be improved, and it can be set as a filter with sufficient humidification efficiency.

The humidifying filter according to the present invention is provided, for example, in a humidifier or a heater, and allows the air flow generated by a fan or the like to pass through the humidifying filter so that the vaporized water is included in the air (air). , Humidifying indoors.
This humidifying filter, for example, immerses the lower part of the humidifying filter in a tray in which water is stored, absorbs water (penetrates) from the lower part to the upper part by the permeation phenomenon, moisturizes the whole, and passes the air to perform humidification. Is.

FIG. 1 is a perspective view showing an embodiment of a humidifying filter according to the present invention, and FIG. 2 is an exploded perspective view of a ventilation sheet 1. This humidifying filter has a corrugated sheet 5 on a plate-like sheet 4. A plurality of ventilation sheets 1 (FIG. 2) that are stacked and integrated are laminated to form a plurality of ventilation through passages 6 in one direction, and a predetermined number of ventilation sheets 1 in the ventilation sheet layer 2. A water-absorbing sheet 3 interposed between the two.
Although not shown, the humidifying filter may be used by being housed in a frame-like case having a large opening in the ventilation direction.

Since the ventilation sheet 1 and the water absorbing sheet 3 are rectangular sheets having the same contour shape, they are laminated and the entire humidification filter becomes a cubic block body.
In other words, the humidifying filter is configured by alternately arranging the air-permeable sheet laminate portion 9 composed of a plurality of air-permeable sheets 1 and the water-absorbing sheet 3.

As shown in FIG. 2, the air-permeable sheet 1 is obtained by stacking the plate-like sheet 4 and the corrugated sheet 5 so that the longitudinal direction of the rectangular plate-like sheet 4 is the corrugated direction of the corrugated sheet 5. The trough portion of the corrugated sheet 5 and the plate-like sheet 4 are combined with an adhesive to form a single air-permeable sheet 1. The adhesive is water-resistant, for example, an adhesive mainly containing a modified ethylene / vinyl acetate copolymer.
Therefore, as shown in FIG. 1, when a plurality of ventilation sheets 1 are laminated in the same direction, in one ventilation sheet 1, between the plate-like sheet 4 and the peak portion of the corrugated sheet 5 and adjacent to each other. Between the mating surfaces of the matching ventilation sheets 1, 1, a large number of ventilation passages 6 are formed between the valleys of the corrugated sheet 5 on one side and the plate-like sheet 4 of the other ventilation sheet 1. Become.

  In addition, a corrugated direction is a direction in which uneven waves continue, and is a vertical direction in the ventilation sheet 1 of FIGS. 1 and 2. Therefore, the ventilation through path 6 is formed in the front-rear direction which is the orthogonal direction, and the direction is the ventilation direction. And when the lower part of a humidification filter is immersed in the saucer which stores water, the water absorption direction (water penetration | infiltration direction) is an up-down direction, and becomes upward from the bottom.

The plate-like sheet 4 and the corrugated sheet 5 are made of a material that can absorb water, such as pulp and synthetic fiber. For example, a woven or non-woven fabric made of rayon, cotton, or the like is used as a raw material. And having a large number of small holes 8 as shown in FIG.
Further, the corrugated sheet 5 is a flat sheet that is continuously bent into an uneven shape, and includes a curved uneven waveform, a square uneven waveform, and the like. Note that the small hole portion 8 may be omitted.

FIG. 3 is a perspective view for explaining a main part of the humidifying filter. The left two sheets in FIG. 3 are the ventilation sheets 1, 1, and the right one sheet is the water absorbing sheet 3. The water absorbent sheet 3 is configured by laminating a corrugated sheet 5 'on a plate-like sheet 4', and the corrugated direction of the vent sheet 1 of the vent sheet layer 2 and the corrugated direction of the water absorbent sheet 3 are 90 °. The orientation is different.
The plate-like sheet 4 ′ and the corrugated sheet 5 ′ of the water absorbent sheet 3 are made of the same material as the plate-like sheet 4 and the corrugated sheet 5 of the ventilation sheet 1, so that another member is unnecessary and the cost is reduced. I am trying.

According to the configuration of FIG. 3, by setting the direction of the ventilation through path 6 by the ventilation sheet 1 to the ventilation direction (arrow A), the ventilation resistance can be reduced and the air permeability can be improved, and humidification can be efficiently performed. .
Furthermore, since the water absorbent sheet 3 has a continuous permeation path portion in the height direction of the humidifying filter, there is no water passage resistance due to adhesive or cross-sectional reduction, the water absorbent sheet 3 assists water absorption by the vent sheet 1, Water can be efficiently sucked up (permeated throughout the height direction: arrow B direction), and water can be permeated one after another to the ventilation sheet 1 adjacent in the left-right direction, so that the entire humidification filter can be reliably moistened.

FIG. 4 is a perspective view for explaining a main part of another embodiment of the humidifying filter. In this humidifying filter, the water absorbing sheet 3 is a non-woven sheet 7 having a thickness t of 2 mm to 4 mm. Yes. The rest is the same as FIG. 1, FIG. 2, and FIG.
The nonwoven sheet 7 is, for example, a sheet (nonwoven fabric) formed by entanglement of fibers such as rayon and cotton. If the thickness t of the nonwoven sheet 7 exceeds the above range, the water absorption is lowered, and it is difficult for water to penetrate into the entire side air-permeable sheet laminate 9 (FIG. 1).

Moreover, in the humidification filter of FIG. 3 and FIG. 4, the water absorption sheet 3 is interposed for every 3 to 15 ventilation sheets 1. If this number is less than the lower limit value, the occupied portion of the ventilation sheet 1 becomes small, the ventilation resistance becomes excessive, and the humidification efficiency decreases. On the other hand, if the upper limit is exceeded, the water sucking performance of the entire humidifying filter is lowered, and the whole cannot be moistened.
Furthermore, preferably, the water absorbing sheet 3 may be interposed for every 8 to 13 air-permeable sheets 1. By setting it as this range, air permeability and water absorption can be further improved.

In the humidifying filter of the present invention, the adjacent ventilation sheets 1 and 1 and the adjacent ventilation sheets 1 and the water absorbing sheet 3 are in contact with each other but are not bonded by an adhesive. It is a non-bonded laminated structure.
Therefore, as shown in FIG. 1, the humidifying filter is formed by a pair of shape holding sheets 10 and 10 that sandwich the air-permeable sheet layer 2 and the water absorbent sheet 3 from above and below. That is, the shape maintaining sheet 10 is in contact with the upper and lower end edges of a large number of air-permeable sheets 1 and the upper and lower end edges of the water-absorbing sheet 3 in the laminated state. They are bonded (adhered) to form an integral humidification filter. In addition, it is preferable to improve rigidity and strength by partially bonding the air-permeable sheets 1 and 1 or adhering the air-permeable sheet 1 and the water-absorbing sheet 3 by partially using an adhesive.

The shape maintaining sheet 10 is also configured by superposing the corrugated sheet 5 ″ on the plate-like sheet 4 ″. In particular, the corrugated direction of the shape retaining sheet 10 is defined as a ventilation direction, and the ventilation sheet is in the orthogonal direction. The shape-retaining sheet 10 helps the penetration of water in the laminating direction of the layer 2 (the left-right direction in FIG. 1).
Moreover, as shown in FIG. 1, the both sides | surfaces of the lamination direction of a humidification filter are made into the water absorption sheets 3 and 3. As shown in FIG.

Next, the water absorption of the humidifying filter of the present invention will be described. Table 1 shows the water suction for each time for one water absorbent sheet 3 in which the corrugated sheet 5 'is superimposed on the plate sheet 4' so that the corrugated direction is horizontal as shown in FIG. The height was measured (Example). In addition, as a comparative example, the suction height was measured when the water absorbent sheet was formed as a single sheet by overlapping the corrugated sheet on the plate-like sheet so that the corrugated direction was the height direction.
In addition, all the test sheets are 40 mm wide × 200 mm high.

Further, Table 2 is a measurement of the water suction height for each time of the humidifying filter (Example) having the configuration shown in FIG. Further, as a comparative example, the suction height of the humidifying filter in which the water absorbing sheet 3 in FIG. 1 was omitted and the ventilation sheet 1 was used instead was measured.
The test humidifying filters are 50 mm long × 196 mm wide × 106 mm high, and a total of 67 sheets are laminated. In the humidifying filter of the present invention, one water absorbing sheet 3 is interposed for every ten ventilation sheets 1.
In both tests, tap water was colored with ink and the bottom of the filter (sheet) was immersed 2 cm. And the minimum height of the penetrated water is measured as the suction height.

  As described above, as can be seen from Tables 1 and 2, according to the configuration of the present invention, water can be permeated to a high position in a short time. Further, according to Table 2, the height of the test piece is 106 mm, whereas in the comparative example, the maximum height of the permeated water reaches about 74 mm even when it exceeds about 180 seconds, and the water reaches the upper end of the test piece. Did not penetrate. However, in the example, the wicking height of the permeated water reaches 106 mm, which is the height of the test piece, over 180 seconds. That is, according to the present invention, extremely good water absorption performance can be exhibited, and the entire humidification filter can be in a wet state.

As described above, according to the present invention, a plurality of ventilation sheets 1 in which the corrugated sheets 5 are integrated with the plate-like sheet 4 are laminated, and the ventilation sheet layer 2 in which a large number of ventilation passages 6 are formed in one direction. And a water absorbing sheet 3 interposed for every predetermined number of ventilation sheets 1 in the ventilation sheet layer 2, the air to be passed can be purified, and ventilation for humidification by a large number of ventilation through passages 6 The air-absorbing performance in the direction is good, and the water-absorbing performance of sucking water from the lower portion by the water-absorbing sheet 3 is excellent. That is, it can be set as the humidification filter provided with both ventilation performance and water absorption performance.
Furthermore, since the ventilation sheet 1 having the corrugated sheet 5 is laminated, the surface area is increased, water retention performance can be improved, and a filter with high humidification efficiency can be obtained.

Further, the water absorbent sheet 3 is configured by laminating a corrugated sheet 5 'on a plate-like sheet 4', and the corrugated direction of the vent sheet 1 of the vent sheet layer 2 and the corrugated direction of the water absorbent sheet 3 are: Since they are different directions rotated by 90 °, the breathable sheet 1 and the water absorbent sheet 3 can be cut out from the same sheet material (because different materials are not used), and the cost can be reduced.
Furthermore, since there is no water resistance due to adhesive or cross-sectional reduction in the height direction, the water absorption performance can be sufficiently exhibited.

  Moreover, since the water absorbing sheet 3 is the non-woven sheet 7 having a thickness t of 2 mm to 4 mm, a humidifying filter with even better water absorbing performance can be obtained without impairing air permeability. Moreover, the water absorbing sheet 3 is interposed for every 3 to 15 air-permeable sheets 1, and the occupied portion of the air-permeable sheet 1 becomes small and the air resistance is not excessive, so that excellent humidification efficiency can be exhibited. In addition, the entire humidification filter can be kept moist without reducing the suction rate.

It is a perspective view which shows one Embodiment of the humidification filter of this invention. It is a disassembled perspective view of a ventilation sheet. It is a perspective view explaining the principal part of a humidification filter. It is a perspective view explaining the principal part of other embodiment of a humidification filter. It is a perspective view explaining the principal part of the conventional humidification filter. It is a perspective view explaining the principal part of the conventional humidification filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Breathable sheet 2 Breathable sheet layer 3 Water absorption sheet 4 Plate-like sheet 4 'Plate-like sheet 5 Corrugated sheet 5' Corrugated sheet 6 Venting passage 7 Non-woven sheet t Thickness

Claims (4)

  A ventilation sheet layer (2) in which a plurality of ventilation sheets (1) each having a corrugated sheet (5) integrated with a plate-like sheet (4) are laminated to form a number of ventilation passages (6) in one direction; And a water-absorbing sheet (3) interposed for each predetermined number of the air-permeable sheets (1) in the air-permeable sheet layer (2).   The water-absorbing sheet (3) is configured by laminating a corrugated sheet (5 ') on a plate-like sheet (4'), and the corrugated direction of the vent sheet (1) of the vent sheet layer (2). The humidifying filter according to claim 1, wherein the waved directions of the water absorbent sheet (3) are different directions rotated by 90 °.   The humidifying filter according to claim 1, wherein the water absorbent sheet (3) is a non-woven sheet (7) having a thickness (t) of 2 mm to 4 mm.   The humidifying filter according to claim 1, 2 or 3, wherein the water absorbing sheet (3) is interposed for every 3 to 15 of the ventilation sheets (1).

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