JP3663466B2 - Filter unit - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a filter unit that is replaceably attached to an air purifier, an air conditioner, or the like.
[0002]
[Prior art]
FIG. 6 shows an overall view of a conventional filter unit. As shown in the figure, the filter unit 51 includes a rectangular flat plate filter body 52, and a vinyl leather 53 attached to the entire periphery of the filter body 52. The vinyl leather 53 is a metal core described later. The material is wrapped and sewn to the filter main body 52 by a sewing thread 54.
[0003]
7 is a cross-sectional view taken along the line AA in FIG. The filter body 52 includes an upper polyethylene net 55a, a lower polyethylene net 55b, and a nonwoven fabric 56 with activated carbon sandwiched between the two. The vinyl leather 52 is sewn to the filter main body 51 with a sewing thread 53 so as to create a space on the outer periphery of the periphery of the filter unit 51, and a metal core made of aluminum or the like for maintaining the shape of the filter unit 51 in the space. The material 57 is arrange | positioned over the perimeter.
[0004]
Such a filter unit 51 is inserted into a pair of U-shaped support fittings 63 attached to a casing 62 of an air purifier 61 as shown in FIG. In such a case 62 of the air cleaner 61, there is an air flow in a direction that causes the filter unit 51 to bend downward, but the core member 56 suppresses the deflection of the filter unit 51 due to the air flow. In addition, 66 is an electric dust collector, 64 is a motor, 65 is a fan.
[0005]
[Problems to be solved by the invention]
Filters used in air purifiers and air conditioners are consumables and must be replaced with new ones after a certain period of time. And what has been used up to that point becomes waste. However, the conventional filter unit has a problem that it has to be treated as incombustible waste because it uses a metal core as the shape holding means, and has a large environmental load.
[0006]
For example, as disclosed in Japanese Patent Application Laid-Open No. 5-293321, a paper material is impregnated with resin to maintain its form, but there are problems such as treatment of exhaust gas and excess resin during incineration. Therefore, it could not be said that the environmental load was still reduced.
[0007]
Also, there are paper materials only, not paper impregnations, and paper materials and a small amount of adhesive, but these are those with a large filter body (for example, about 5 cm), filter bodies However, it cannot be applied to the case where the filter main body is flat and cannot play the role of maintaining the shape.
[0008]
In view of such problems, the present invention has been made for the purpose of significantly reducing the environmental load by providing a form holding force in a filter unit having a flat filter body without using metal or resin. It is.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is provided with a flat filter body, a paper frame bent to include a first piece and a second piece facing the first piece, and the paper frame. The first piece, the second piece, and the peripheral edge of the filter body sandwiched between the two pieces are stitched together.
[0010]
The invention according to claim 2 is provided with a flat filter body, a paper frame bent to include a first piece and a second piece facing the first piece, and the paper frame. The first piece, the second piece, and the peripheral portion of the filter body sandwiched between the two pieces are stitched, and the paper frame has a side piece longer than the thickness of the filter body, the side piece, and the first piece. Or it has the connection piece which connects a 2nd piece, It is characterized by the above-mentioned.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an overall view of the first embodiment. A filter unit 1 includes a rectangular flat plate filter body 2, a paper frame 3 attached over the entire periphery of the filter body 2, and a paper frame. 3 includes a sewing thread 4 for sewing 3 to the peripheral edge of the filter body.
[0012]
FIG. 2 is a sectional view taken along line BB in FIG. As shown in the figure, the filter main body 2 has a laminated structure in which a polyethylene net 5a, a nonwoven fabric 6 with activated carbon, and a lower polyethylene net 5b are stacked in this order. Here, the nonwoven fabric 6 with activated carbon has an air cleaning effect such as deodorization, and the polyethylene nets 5a and 5b are provided to protect the nonwoven fabric 6 with activated carbon. The thickness d of the filter body 2 is 5 mm, for example.
[0013]
The peripheral portion 7 of the filter body 2 includes a lower piece 8a (first piece), a side piece 8b, and an upper piece 8c (second piece) corresponding to the peripheral portion lower surface 7a, the peripheral portion side surface 7b, and the peripheral portion upper surface 7c, respectively. ) Is attached so as to sandwich the peripheral edge 7 of the filter body 2 from both sides. The paper frame 3 is made of, for example, a corrugated cardboard having a thickness of about 1 mm or a thick paper having a thickness of 0.5 mm, and an aluminum foil tape 9 is attached to the outer surface. By sticking this aluminum foil tape 9, it is possible to prevent the strength of the paper frame 3 from being lowered due to moisture, and to eliminate the uncomfortable appearance when inserted into a metal housing such as an air purifier. . The aluminum foil used for this aluminum foil tape 9 is thinner than the aluminum foil for home use, and only a small amount of aluminum oxide ash is produced even if it is incinerated. is there.
[0014]
The lower piece 8a and the upper piece 8c of the paper frame 3 and the peripheral edge 7 of the filter body 2 sandwiched between the two are sewn together by a sewing thread 4 composed of an upper thread 4a and a lower thread 4b. The upper thread 4a and the lower thread 4b intersect and pull each other inside the filter body 2, and the tensile force acts to press the lower piece 8a and the upper piece 8c against the filter body 2 from opposite directions. Has resisted that push. Thereby, an upper piece and a lower piece are fixed, and a cross-sectional U-shaped form is stabilized. The tension of the upper thread 4a and the lower thread 4b is such that the lower piece 8a and the upper piece 8c can restrict the expansion, and the lower piece 8a and the upper piece 8c made of paper material are not torn apart. . The material of the sewing thread 4 may be polyester, cotton thread or the like, but natural fibers such as cotton thread are desirable from the viewpoint of environmental load. This sewing is performed by sewing the sewing machine.
According to the first embodiment, the paper frame 3 bent in a U-shaped cross-section has its upper and lower pieces fixed by stitching so that its form is stabilized and the form of the filter unit 1 is maintained. Functions as a means. Therefore, it is not necessary to use a metal material or resin as the shape holding means, so that the environmental load can be greatly reduced.
[0015]
The second embodiment of the present invention will be described below with reference to FIGS. FIG. 3 shows a part of the appearance of the second embodiment. As in the first embodiment, the filter unit 11 includes a rectangular and flat filter body 12, a paper frame 13 attached over the entire periphery of the filter body 12, and a paper frame 13 at the periphery of the filter body. The sewing thread 14 is sewn.
[0016]
FIG. 4 is a cross-sectional view taken along the line CC of FIG. As shown in the figure, the filter body 12 has a laminated structure in which a polyethylene net 15a, a nonwoven fabric 16 with activated carbon, and a lower polyethylene net 15b are stacked in this order. Here, the nonwoven fabric 16 with activated carbon has an air cleaning effect such as deodorization, and the polyethylene nets 15a and 15b are provided to protect the nonwoven fabric 16 with activated carbon. The thickness d of the filter body 12 is, for example, 5 mm.
[0017]
The peripheral edge 17 of the filter body 12 extends upward from the peripheral edge of the lower piece 18a corresponding to the lower edge 18a corresponding to the peripheral edge lower surface 17a and the peripheral edge side face 17b, and has a thickness d of about 2 of the filter body 12. Double side piece 18b, connecting piece 18c extending obliquely from the upper end of side piece 18b toward peripheral surface 17c and connecting side piece 18b and upper piece 18d described later, and connecting piece 18c are filter bodies. 12 so that the paper frame 13 bent so as to have an upper piece 18d extending inwardly along the peripheral surface 17c from a point in contact with the peripheral surface 17c of the 12 sandwiches the peripheral portion 16 of the filter body 12 from both sides. It is attached. The paper frame 13 is made of, for example, a corrugated cardboard having a thickness of about 1 mm or a thick paper having a thickness of 0.5 mm.
[0018]
Then, the lower piece 18a and the upper piece 18d of the paper frame 13 and the peripheral edge portion 17 of the filter body 12 sandwiched between the two are sewn together by a sewing thread 14 including an upper thread 14a and a lower thread 14b.
[0019]
According to the second embodiment, the folded and formed paper frame 13 is fixed to the upper piece and the lower piece by stitching, so that its own form is stabilized and functions as a form holding means for the filter unit 1. . In addition, the triangular structure of the side piece 18b and the connecting piece 18c longer than the thickness d of the filter body 12 is stabilized, and functions as a form holding means having higher strength than that of the first embodiment. Therefore, it is not necessary to use a metal material or resin as the shape holding means, so that the environmental load can be greatly reduced.
[0020]
Hereinafter, Embodiment 3 of the present invention will be described with reference to FIG. In the third embodiment, a reinforcing member 21 is incorporated in the same filter unit as in the second embodiment. The reinforcing material 21 is made of bent cardboard, cardboard, or the like, like the paper frame 13, and has a side piece reinforcing piece 21a that contacts the inside of the side piece 13b of the paper frame 13 and a surface that contacts the inside of the connecting piece 13c. Connecting piece reinforcing piece 21b.
[0021]
According to such Embodiment 3, while having the same effect as Embodiment 2, intensity | strength can be adjusted as needed.
[0022]
The present invention is not limited to the embodiments described here as examples, and the side piece may be inclined with respect to the surface of the filter body and the connection piece may be vertical. Further, the reinforcing piece may be applied to a paper frame having a U-shaped cross section. Further, the paper frame may be provided not on the entire circumference of the filter body but on two opposing sides.
[0023]
【The invention's effect】
According to the invention described in claim 1, comprising a flat filter body, and a paper frame bent to include a first piece and a second piece facing the first piece, Since the first and second pieces of the paper frame and the peripheral portion of the filter body sandwiched between the two are sewn, the first and second pieces of the paper frame are fixed by stitching. Thus, its form is stabilized and functions as a form holding means for the filter unit, and it is not necessary to use a metal material or a resin as the form holding means, so that the environmental load can be greatly reduced.
[0024]
According to the invention described in claim 2, comprising a flat filter body, and a paper frame bent to include a first piece and a second piece facing the first piece, The first piece of the paper frame, the second piece, and the peripheral edge of the filter body sandwiched between the two are sewn, and the paper frame includes the side piece longer than the thickness of the filter body, the side piece and the first piece. And the connecting piece connecting the second piece and the second piece, the first piece and the second piece are fixed by stitching the paper frame to stabilize the shape of the filter unit 1. It functions as a form holding means. In addition, the shape of the triangular structure of the side piece and the connecting piece longer than the width of the filter body is stabilized and functions as a form holding means with high strength. Therefore, it is not necessary to use a metal material or resin as the shape holding means, so that the environmental load can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is an overall view of a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line BB of FIG.
FIG. 3 is a diagram showing a part of the appearance of a second embodiment of the present invention.
4 is a cross-sectional view taken along the line CC of FIG.
FIG. 5 is a cross-sectional view of a third embodiment of the present invention.
FIG. 6 is an overall view of a conventional filter unit.
7 is a cross-sectional view taken along the line AA in FIG.
FIG. 8 is a view showing a state in which the filter unit is attached to the air cleaner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filter unit 2 Filter main body 3 Paper frame 4 Sewing thread 7 Peripheral part 7a Peripheral part lower surface 7b Peripheral part side surface 7c Peripheral part upper surface 8a Lower piece 8b Side piece 8c Upper piece 11 Filter unit 12 Filter main body 13 Paper frame 14 Sewing thread 17 Peripheral part 17a Peripheral part lower surface 17b Peripheral part side surface 17c Peripheral part upper surface 18a Lower piece 18b Side piece 18c Connection piece 18d Upper piece

Claims (2)

A flat filter body,
A paper frame bent to include a first piece and a second piece facing the first piece;
A filter unit comprising a first piece of the paper frame, a second piece, and a peripheral portion of the filter body sandwiched between the two pieces. A flat filter body,
A paper frame bent to include a first piece and a second piece facing the first piece;
The first piece of the paper frame, the second piece, and the periphery of the filter body sandwiched between the two are sewn,
The paper frame includes a side piece longer than a thickness of the filter main body and a connection piece for connecting the side piece and the first piece or the second piece.

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