JP2004321651A - Deodorization filter for ventilation hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorization filter for a ventilation hole for demonstrating a filter function highly efficiently with low pressure loss. <P>SOLUTION: The deodorization filter 11 is mounted on the ventilation hole 10 of a building such as a house, is composed of a deodorization sheet, and is provided with a filtering surface 11a so as to be parallel to the filtering direction of air going in and out of the ventilation hole 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a deodorizing filter attached to a ventilation port provided in a building such as a house that is naturally ventilated, for example, and relates to a deodorizing filter for a ventilation port having a low pressure loss and exhibiting a filter function with high efficiency. .
[0002]
[Prior art]
2. Description of the Related Art In recent years, from the viewpoint of energy saving, improvement of heat insulation of a house and higher secrecy have been attempted. On the other hand, high airtightness of buildings has reduced natural ventilation, stagnation of air, and there has been a concern of contamination by chemical substances.
[0003]
To address these problems, building materials that minimize the generation of chemical substances are used, and ventilation holes are installed in the walls of each room so that air inside and outside the room can be exchanged.
[0004]
However, with the increase in the ventilation volume of the building due to the installation of the ventilation opening, a new problem has arisen that dust, odor, pollen, and the like invade from outside through the ventilation opening.
[0005]
Conventionally, in order to prevent dust, odor, pollen, and the like from entering a room, a filter is installed in the ventilation opening. For example, what is shown in FIG. 7 is a filter 2 in which an antibacterial sheet having an antibacterial function and a deodorizing sheet having a deodorizing function are laminated on a dust removing sheet having a dust removing function, and a bellows portion 2a is provided to increase the surface area. This is mounted on the ventilation port 1 so as to cover the entire air passage of the ventilation port 1 formed on the wall 3 of the building, thereby purifying the air (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-11-248211
[Problems to be solved by the invention]
However, in the case of a vent that does not have a device such as a ventilation fan to forcibly ventilate the air, the ventilation only allows the indoor or outdoor air to naturally communicate through the vent. In the case of a filter that is provided so as to cover the entire passage and that performs functions such as dust removal and deodorization while air passes through each functional sheet such as dust removal and deodorization, pressure loss increases. As a result, there is a possibility that air may not pass through the filter and the original function may not be exhibited.
[0008]
Furthermore, even if this type of ventilation port is provided with a filter of the above-described form and air is forcibly sucked, the pressure loss of the filter is large and the cost of ventilation increases.
[0009]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a deodorizing filter for a ventilation port that has a low pressure loss and exhibits a filter function with high efficiency.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to a deodorizing filter attached to a ventilation opening of a building such as a house, comprising a deodorizing sheet, and filtering the air so as to be parallel to a filtering direction of air entering and exiting the ventilation opening. The gist of the present invention is a deodorizing filter for a ventilation port, which is provided with a surface.
[0011]
The ventilating port deodorizing filter of the present invention is mounted on a ventilating port provided with a device for forcibly ventilating air, such as a ventilation fan, or in which indoor or outdoor air is naturally communicated and ventilated through the ventilating port. Things.
[0012]
Hereinafter, a deodorizing filter for a vent according to the present invention will be described in detail with reference to an embodiment shown in the drawings. 1 and 2 are naturally ventilated. On the outdoor side of the ventilation opening 10 formed in the wall 3 of the building, a substantially hemispherical hood 4 for preventing rainwater or the like from entering the inside of the building and a gull 5 for opening and closing the opening of the ventilation opening 10 are provided by a mounting frame 6. It is attached along the periphery of the ventilation opening 10. On the other hand, a net 7 for preventing insects from entering and falling off from the ventilation port is attached to the indoor opening of the ventilation port 10. The ventilation port deodorizing filter 11 of the present invention (hereinafter, simply referred to as a deodorizing filter 11) is mounted in the ventilation port 10 configured as described above.
[0013]
The deodorizing filter 11 of the present invention includes a deodorizing sheet 12 that removes odors contained in air by adsorption, decomposition, and the like. The deodorizing sheet 12 is formed by supporting and adhering deodorizing powder particles having a deodorizing function to a breathable sheet member made of a nonwoven fabric, paper, woven fabric, knitted fabric, net, or a composite material obtained by laminating a plurality of them. .
[0014]
As the deodorized powder, conventionally known powders can be used, for example, those containing an adsorbent having a physical adsorption action such as activated carbon or zeolite, titanium oxide, phthalocyanine, those having a catalytic action such as platinum, or Chemical deodorants that act directly on odors can be mentioned.
[0015]
As the chemical deodorant, those acting on acidic odors include alkali metal carbonates such as potassium carbonate, potassium hydrogen carbonate, sodium carbonate and sodium hydrogen carbonate, and amine compounds such as ethanolamine, hexamethylenediamine, and piperazine; Those acting on alkali odor include phosphoric acid, sulfuric acid, nitric acid, malic acid, citric acid, and ascorbic acid.
[0016]
Further, the deodorized powder, for example, a combination of the above-mentioned powder for acid odor and the powder for alkaline odor, or has a physical adsorption action such as activated carbon such powder for acid odor or powder for alkaline odor. It is also possible to carry and fix the sheet-like member in a form in which various kinds of deodorized powder and granules are combined, such as by adhering to powder and granules.
[0017]
Further, as a method of holding and fixing the deodorized powder to the sheet-like member, for example, by attaching a binder containing the deodorized powder to the sheet-like member, the deodorized powder to the sheet-like member via the binder A method of fixing, or using a non-woven fabric made of a hot melt resin as a sheet-like member, and performing a heat treatment in a state where the non-woven fabric is in contact with the deodorized powder granules, thereby forming a resin aggregated portion on the sheet, And a method of fixing and supporting a deodorized powder.
[0018]
As shown in FIG. 1, the deodorizing filter 11 is provided with a filtering surface 11a so as to be parallel to a filtering direction A of air flowing into and out of the ventilation port 10 when the filter is attached to the ventilation port 10. In the process of air entering and exiting the ventilation direction 10 in the ventilation direction A, the air comes into contact with the filtration surface 11a of the ventilation port filter 11 provided so as to be parallel to the air filtration direction A, and is included in the air at this time. Dust and / or deodorization is performed, and the air is cleaned. For this reason, since the deodorizing filter 11 does not become a large obstacle to the flow of air, the pressure loss of the deodorizing filter 11 is very low.
[0019]
In the case of the deodorizing filter 11 of the present invention, the area ratio in the filtering direction is desirably 10 to 60%. When the area ratio of the deodorizing filter 11 is less than 10%, the pressure loss becomes small, but the deodorizing function such as adsorption and decomposition of the odor contained in the air becomes insufficient. On the other hand, when the area ratio exceeds 60%, the pressure loss becomes large, so that sufficient ventilation cannot be secured, and in this case, the original deodorizing function is not exhibited.
[0020]
As a specific form of the deodorizing filter 11 of the present invention, for example, as shown in FIG. 1 to FIG. 4, there can be mentioned a filter formed by pleating the deodorizing sheet 12 and curling the folds radially. .
[0021]
In this case, as shown in FIG. 4, the thickness of the deodorizing sheet 12 is reduced and the number of folds is reduced, so that the air passes through the ventilation port filter 11 when the ventilation sheet is attached to the ventilation port 10. The space to be used is large, and the pressure loss at that time is smaller. On the other hand, by increasing the thickness of the deodorizing sheet 12 and increasing the number of folds, the space through which the air passes through the deodorizing filter 11 is reduced, and the pressure loss is increased, but the space between the filtering surface 11a and the air is increased. Since the contact area is increased, the dust removing and deodorizing effects are increased accordingly. For this reason, the thickness of the deodorizing sheet 12 and the number of folds may be appropriately changed according to the size and depth of the ventilation port 10 and the type of room.
[0022]
Further, a cylindrical sheet 14 is attached to the outer peripheral surface of the deodorizing filter 11, and a shape in which the folds of the deodorizing filter 11 spread radially is fixed. For this reason, the interval between the folds of the deodorizing filter 11 is also fixed by the sheet 14, and the adjacent folds do not come into contact with each other, and the air path passing through the folds is maintained at a constant interval.
[0023]
Further, as another form of the deodorizing filter 11 of the present invention, a filter formed of a honeycomb structure using a deodorizing sheet, a filter formed of a corrugated structure using a deodorizing sheet, and the like can be given.
[0024]
Also in the case of a honeycomb structure or a corrugated structure using a deodorizing sheet, by appropriately changing the thickness of the deodorizing sheet to be used, the size of the cam and the repetition width, the magnitude of pressure loss of the deodorizing filter, dust removal and deodorization are reduced. Can be adjusted.
[0025]
In the embodiment shown in FIGS. 1 to 4, a dust filter 13 is arranged on one cylindrical end face (or both end faces) of the deodorizing filter 12 so as to sandwich the deodorizing filter 11. The dust removing filter 13 is for collecting dust and dust in the air, and is made of a dust removing sheet such as a nonwoven fabric, a paper, a woven fabric, a knitted fabric, a net, or a composite material obtained by laminating a plurality of these, or the dust removing sheet. The surface of which has been pleated to increase the surface area can be used.
[0026]
When the dust filter 13 is arranged on one end face of the deodorizing filter 11 of the present invention, the dust filter 13 is arranged so as to close the ventilation port 10 as shown in the drawing, so that the air in and out of the ventilation port 10 can enter and exit. It is desirable to have a gas permeability that does not hinder the pressure loss, specifically, a material having a low pressure loss of 5 Pa or less at 30 cm / s.
[0027]
In the embodiment shown in FIGS. 5 and 6, the deodorizing filter 11 and the dust removing filter 13 are bonded via a hot melt resin applied to the core portions (6 mm, preferably 4 mm from the core) on both end surfaces of the deodorizing filter 11. The deodorizing filter 11 and the dust removing filter 13 can be handled as an integrated product. In the case of this form, the interval between the folds is fixed by the dust removal filter 13 adhered to both surfaces of the deodorizing filter 11, and the adjacent folds do not come into contact with each other, so that the path of the air passing through the folds is constant. It is kept at intervals.
[0028]
In addition, the application area of the adhesive of the deodorizing filter 11 becomes a dead space and does not contribute to filtration. For this reason, for example, in the filter according to the embodiment, the area of the deodorizing filter to which the adhesive is applied in the filtering direction of the deodorizing sheet is preferably in the range of 70 to 400 mm ² because the filtering function is not adversely affected. .
[0029]
【Example】
1. Manufacture of deodorizing sheet Polyamide hot-melt nonwoven fabric having an areal density of 10 g / m ² was laminated using a spunbond made of polyester having an areal density of 20 g / m ² as a support. Activated carbon classified in the range of メ ッ シ ュ 60 mesh was sprayed (275 g / m ² ). Next, a steam treatment is performed from the spun bond side to plasticize and melt the polyamide-based hot melt nonwoven fabric, to form a connection portion made of a hot melt resin and a resin aggregation portion, and to activate activated carbon through the resin aggregation portion. Was fixed.
[0030]
Thereafter, a polyamide hot-melt nonwoven fabric having an areal density of 20 g / m ² was laminated on the fixed side surface of the activated carbon, and activated carbon classified in a range of 32 to 60 mesh was spread on the upper surface (275 g / m ² ). Next, a polyamide hot melt nonwoven fabric having an areal density of 20 g / m ² was laminated on the activated carbon, and a spun bond made of polyester having an areal density of 20 g / m ² was further laminated on the hot melt nonwoven fabric.
[0031]
Thereafter, a steam treatment is performed to plasticize and melt the polyamide-based hot-melt nonwoven fabric, to form a connection portion and a resin aggregation portion made of a hot-melt resin, and to fix activated carbon through the resin aggregation portion, The desired deodorizing sheet was obtained.
[0032]
The resulting deodorized sheet had an areal density of 365 g / m ² and an apparent thickness of about 1 mm.
2. Manufacture of Deodorizing Filter The obtained deodorizing sheet was pleated and rolled so that the folds spread radially and joined at both ends to obtain a deodorizing filter shown in FIG.
[0033]
In addition, the height of the fold of the deodorizing filter was 28 mm, the number of folds was 36, the external dimension was 80 mm, and the height (dimension in the depth direction of the ventilation port) was 30 mm. The area ratio of the obtained deodorizing filter was about 40%.
3. Integration with a dust filter Next, a hot melt resin is applied to one end surface of the deodorizing filter from the core of the deodorizing filter with a width of 4 mm, and the dust is formed of a polyester spunbond nonwoven fabric having a surface density of 20 g / m ^2. The filter was glued.
[0034]
In addition, the application area of the adhesive of the deodorizing filter becomes a dead space and does not contribute to filtration. For this reason, for example, in the filter according to the embodiment, the area of the deodorizing filter to which the adhesive is applied in the filtering direction of the deodorizing sheet is preferably in the range of 70 to 400 mm ² because the filtering function is not adversely affected. .
[0035]
【The invention's effect】
In the deodorizing filter of the present invention, the filtering surface is provided so as to be parallel to the filtering direction of the air flowing into and out of the ventilation port, so that the pressure loss is low and the filter function is exhibited with high efficiency. It is preferable as a ventilating filter that is naturally ventilated.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view showing a state in which a deodorizing filter of the present invention is mounted in a ventilation opening.
FIG. 2 is an assembled perspective view showing a deodorizing filter, a dust removing filter, an insect repellent net, and the like of the present invention mounted in a ventilation opening.
FIG. 3 is an enlarged perspective view showing a deodorizing filter of the present invention.
FIG. 4 is a plan view of the deodorizing filter of the present invention.
FIG. 5 is an enlarged perspective view showing another embodiment of the deodorizing filter of the present invention.
FIG. 6 is a plan view showing another embodiment of the deodorizing filter of the present invention.
FIG. 7 is an enlarged perspective view showing a conventional deodorizing filter of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Ventilation port 11 ... Deodorizing filter 11a ... Filtering surface 12 ... Deodorizing sheet 13 ... Dust removal filter

Claims (6)

A deodorizing filter attached to the ventilation port,
A deodorizing filter for a ventilation port, comprising a deodorizing sheet, and a filtering surface provided so as to be parallel to a filtering direction of air flowing into and out of the ventilation port. The deodorizing filter for a vent according to claim 1, wherein an area ratio in a filtration direction is 10 to 60%. The deodorizing filter according to claim 1 or 2, wherein the deodorizing sheet is pleated and rolled so that the folds are radially spread. The deodorizing filter for a vent according to any one of claims 1 to 3, wherein the deodorizing sheet comprises activated carbon. The deodorizing filter according to claim 4, wherein the activated carbon is an impregnated carbon to which an adsorbent or a chemical deodorant is added. A deodorizing filter for a ventilation port, wherein a dust filter is disposed on one end surface or both end surfaces of the deodorizing filter for a ventilation hole according to any one of claims 1 to 5.

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