JP2023147574A - air filter - Google Patents

Abstract

To provide an air filter which more hardly causes clogging in comparison with a conventional air filter.SOLUTION: An air filter 50 according to the present invention is an air filter in which a filtration member 30 in a block shape is stored in an inner storage part 17 of a frame body 10. The frame body 10 comprises opening parts 20 at a front surface part 11 and at a back surface part 12, where fall-off preventing tools 22 in a net shape for preventing the filtration member 30 from falling off are provided at both opening parts 20 at the front surface part 11 and the back surface part 12. The frame body 10 may be made of paper. The frame body 10 can be formed in a box shape which comprises a right-side surface part 13, a left side surface part 14, an upper surface part 15 and a bottom surface part 16 leading to the front surface part 11 and the back surface part 12. Mountain-folded lines 19 extending along longitudinal directions of the surface parts can be formed on the surface parts.SELECTED DRAWING: Figure 1

Description

The present invention relates to an air filter installed and used in paint booths, factories, kitchens, clean rooms, etc.

Filters are used in paint booths, factories, kitchens, clean rooms, etc. Types of filters are broadly classified into wet filters and dry filters, and the one that is more suitable for the purpose is selected.

Although wet filters have excellent trapping power, they require a lot of effort and cost to process water after use, so in recent years, dry filters have been increasingly selected. BACKGROUND ART Air filters developed by the applicant of the present invention (Patent Documents 1 and 2) are conventionally known as dry filters.

Utility model registration No. 3067922 Utility model registration No. 3175440

In the air filter of Patent Document 1, pleated paper or the like is used as the filter medium, but this type of filter medium is easily clogged and needs to be replaced frequently, which takes time and cost. .

On the other hand, since the air filter of Patent Document 2 uses a block-shaped filter medium, it is less likely to become clogged compared to a pleated filter medium. However, in the air filter of Patent Document 2, a sheet-like filter is provided on one side, and if this sheet-like filter becomes clogged, the entire air filter must be replaced even if the filtering ability of the block-like filter medium remains. resources were not being utilized effectively.

The present invention has been made in view of the above circumstances, and an object to be solved is to provide an air filter that is less likely to be clogged than conventional air filters and can use up the filter material without wasting it.

The air filter of the present invention is an air filter in which a block-shaped filter medium is housed in a housing part inside a frame body, and the frame body is provided with openings at the front part and the back part, and both the front part and the back part A net-like (mesh-like) falling-off prevention device is provided at the opening of the filter to prevent the filter medium from falling off. The frame can be made of paper. The frame body may be box-shaped with a right side part, a left side part, a top part, and a bottom part continuous with the front part and the back part, and a mountain fold line may be provided on each face part along the longitudinal direction of each face part. can.

In the air filter of the present invention, reinforcing portions can also be provided on the front and back portions. The frame can also be provided with a regulating device that regulates the movement of the filter medium. The frame can also be constructed by joining one or more elongated frame members in a ring shape. In this case, the frame component may include a side component, a front component, and a back component.

The air filter of the present invention uses a block-shaped filter medium instead of a pleated filter medium or a sheet-shaped filter medium, and also has openings on both the front and back sides. Compared to conventional air filters, it is less prone to clogging and allows the filter media to be used up without wasting it.

FIG. 1 is a perspective view showing an example of an air filter of the present invention. (a) is a front side perspective view showing an example of a frame, (b) is a back side perspective view of the frame of (a). The perspective view which shows an example of the state where an air filter is attached to a mounting frame. FIG. 3 is an explanatory diagram showing an example of the positional relationship between the mountain fold portion and the mounting frame when the air filter is attached to the mounting frame. (a) is a perspective view showing an example of an air filter provided with a restrictor, and (b) is a view taken along the line Vb-Vb in (a). (a) is a perspective view showing an example of a case in which a frame is constructed using two L-shaped frame members, and (b) is a perspective view showing an example of an air filter using the frame of (a). figure. (a) is a perspective view showing an example of a case where a frame is constructed using two L-shaped frame members, (b) is a perspective view when a reinforcing material is provided in the frame shown in (a), (c) is a perspective view showing an example of an air filter using a frame provided with the reinforcing material of (b). FIG. 1 is a schematic diagram showing an example of a painting booth using the air filter of the present invention.

(Embodiment)
EMBODIMENT OF THE INVENTION Hereinafter, an example of embodiment of the air filter of this invention is described with reference to drawings.

As an example, an air filter 50 shown in FIG. 1 includes a frame 10 and a filter medium 30. The frame 10 of this embodiment is a thin box having a rectangular shape when viewed from the front, and includes a front part 11, a back part 12, a right side part 13, a left side part 14, a top part 15, and a bottom part 16. A accommodating portion 17 for accommodating the filter medium 30 is provided.

Notches 18 are provided at the four corners of the frame 10, and cutouts 18 are provided at the center in the front-rear direction (thickness direction) of each surface of the right side 13, left side 14, top 15, and bottom 16 of the frame 10. , mountain fold lines 19 are provided along the longitudinal direction of each surface.

As shown in FIGS. 2(a) and 2(b), the frame 10 is provided on each surface of the right side part 13, the left side part 14, the top part 15, and the bottom part 16 in a state where the filter medium 30 is not accommodated. By mountain folding along the mountain fold line 19, the front part 11 and the back part 12 are configured to be crushed in a direction toward each other.

Further, each of the surface portions 13 to 16 provided with the mountain fold line 19 is configured such that the portion of the mountain fold line 19 is always mountain folded when the filter medium 30 is filled.

A plurality of triangular and quadrangular openings 20 are provided in the front part 11 and back part 12 of the frame 10, and reinforcing parts 21 are provided between adjacent openings 20. The illustrated shape and number of openings 20 are merely examples, and other shapes may be used. Further, the reinforcing portion 21 may be provided as necessary, and may be omitted if unnecessary.

The frame 10 of this embodiment is composed of two square pieces of cardboard. Specifically, two pieces of cardboard having the same size and shape are prepared, and the openings 20 and the mountain fold lines 19 are formed by punching out each piece of cardboard. The two sheets of cardboard on which the opening 20 and the mountain fold line 19 are formed are stacked so that the right side parts 13, the left side parts 14, the top parts 15 and the bottom parts 16 are overlapped, and the overlapping parts are glued together. The frame body 10 is constituted by.

Each opening 20 is provided with a mesh-like falling-off prevention device 22 that prevents the filter medium 30 housed in the housing portion 17 from falling off.

In this embodiment, the front part 11 and the back part 12 can be separated by attaching one falling-off prevention tool 22 having approximately the same area as the front part 11 and the back part 12 to the back surface of each of the front part 11 and the back part 12. A falling-off preventive device 22 is provided in all the openings 20 configured as shown in FIG. The falling-off prevention device 22 can also be provided individually for each opening 20.

The frame 10 of this embodiment is made of cardboard except for the falling-off prevention tool 22. The frame 10 can also be constructed from materials other than cardboard. The slip-off prevention device 22 can be made of filament yarns such as polyester or glass, high-strength/high-elasticity fibers such as carbon or aramid, or spun yarns such as cotton yarns.

The filter medium 30 is a member that captures scattered objects (objects to be captured) such as paint and dust floating in the air. The filter medium 30 is composed of a non-directional fiber aggregate, a sponge, or the like, in which fibers of chemical fibers or glass fibers are bonded together to serve as a filter medium.

In this embodiment, the filter material 30 is made by cutting scraps from an original filter material into a desired size. By using scraps from the original filter material, scraps that were previously disposed of can be effectively utilized, which is economical.

The filter medium 30 of this embodiment has a hexahedral block shape of about 10 mm to 50 mm. The size and shape of the filter medium 30 are only an example, and may be other than the above. Also, the size and shape of the filter medium 30 do not need to be constant, and those of irregular shape (various sizes and shapes) may be used. You can also do that. In either case, the capture rate by the filter medium 30 can be improved by using a shape that allows for a large surface area.

The air filter 50 of the present invention is used by being fitted into a mounting frame F as shown in FIG. 3, for example. As shown in FIG. 4, in this embodiment, when the air filter 50 is fitted into the mounting frame F, the mountain-folded portion along the mountain-fold line 19 comes into contact with the inner surface of the mounting frame F, and the air filter 50 is attached to the frame 10. Passage of flying objects between the frames F is prevented.

The air filter 50 of this embodiment has the same structure on the front part 11 side and the back part 12 side and has no directionality, so there is no need to check the direction of the air filter when installing it to the mounting frame F. This has the advantage that time loss due to incorrect installation orientation is less likely to occur.

When the air filter 50 is used vertically, the filter medium 30 may move downward within the housing section 17 of the frame 10, and the filter medium 30 may be unevenly distributed within the housing section 17. In order to prevent such an event, the frame 10 may be provided with a restrictor 40 that restricts the movement of the filter medium 30.

As an example, a restrictor 40 shown in FIGS. 5(a) and 5(b) includes a male member 41 and a female member 42 that fits into the male member 41. The male member 41 is inserted from the front part 11 side of the frame body 10, and the female member 42 is inserted from the rear part 12 side of the frame body 10, and both are fitted within the frame body 10. The male member 41 and the female member 42 may be inserted into the male member 41 from the back side 12 side and the female member 42 from the front side 11 side.

Only one restrictor 40 may be provided, but two or more restrictors 40 may also be provided. By providing two or more restrictors 40, uneven distribution of the filter medium 30 within the housing portion 17 can be easily prevented. When two or more restricting tools 40 are provided, each restricting tool 40 can be arranged regularly or irregularly. The restrictor 40 may be provided as necessary, and can be omitted when measures to prevent uneven distribution of the filter medium 30 are not required, such as when uneven distribution of the filter medium 30 is unlikely to occur.

(Other embodiments)
In the embodiment described above, the case where the frame body 10 is constructed of two square pieces of cardboard is taken as an example, but the frame body 10 can also be constructed in other ways. For example, as shown in FIGS. 6(a) and 6(b), two L-shaped frame members 60 constituting two sides of the frame 10 are prepared, and the two are joined in a ring shape to form a frame. The body 10 can also be configured.

The frame member 60 shown in FIGS. 6(a) and 6(b) is an elongated member (long material). The frame component 60 includes a front component 60a, a back component 60b, and a side component 60c. The front structure part 60a is a part that forms the front part 11 when assembled, the back structure part 60b is a part that forms the back part 12 when assembled, and the side structure part 60c is a part that forms the right side part 13 and the left side part 14 when assembled. , which constitutes the top surface portion 15 or the bottom surface portion 16. The strength of the frame 10 can be improved by forming the frame component 60 with a structure including a front component 60a, a back component 60b, and a side component 60c.

The frame member 60 shown in FIGS. 6A and 6B includes a first side 61 and a second side 62 that are bent into an L shape. A joining piece 63 used for joining with another frame component member 60 is provided at the tip of the second side 62 . The joining piece 63 can also be provided on both the first side 61 and the second side 62.

In the illustrated example, two frame members 60 having the same structure are prepared, and each joining piece 63 is adhered to the end of the other frame member 60 to form the frame 10 having a square shape when viewed from the front. are doing. Although not shown in the drawings, mountain fold lines 19 may be provided on the first side 61 and the second side 62 as necessary.

The frame component 60 in FIGS. 6(a) and 6(b) is made by cutting an original fabric (for example, a sheet material measuring 90 cm long x 180 cm wide) along the longitudinal direction, and inserting a fold line (break line) at the required position. Because it can be made with just one person, there is less material loss. Further, since cutting and folding can be performed using only an existing knife (mold), there is an advantage that there is no need to separately prepare a special mold for manufacturing the frame 10.

When the frame body 10 is constituted by such a frame body constituent member 60, there is no reinforcing portion 21 as in the above embodiment, but in this case, as shown in FIGS. 7(a) to (c), The reinforcing parts 21 can be separately created and provided on the front part 11 side and the back part 12 side of the frame body 10. By providing the reinforcing portion 21, for example, twisting (deformation) of the air filter due to the suction force of the fan can be suppressed. The reinforcing portion 21 can be made of scraps or the like.

In the example shown in FIG. 7B, the shape of the reinforcement part 21 on the front part 11 side is a cross shape like a multiplication sign (x symbol), and the shape of the reinforcement part 21 on the back part 12 side is a cross shape like a multiplication sign (+ symbol). ) as a cross shape.

The reinforcing portion 21 may have a shape other than these. When the shapes of the reinforcing portions 21 are different from each other, it can be expected that deformation of the air filter can be more easily suppressed than when the reinforcing portions 21 of both the reinforcing portions 21 have the same shape. However, the reinforcement parts 21 of the front part 11 and the back part 12 may have the same shape.

When the frame body 10 is constructed from frame body members 60 as shown in FIGS. 6(a), (b) and FIGS. 7(a) to (c), square openings 20 are formed in the front part 11 and the back part 12. However, similar to the embodiment described above, both openings 20 are provided with fall-off prevention tools 22 of various shapes including a mesh shape.

Here, an example is given in which the frame 10 is constructed using two L-shaped frame members 60, but the frame 10 includes a U-shaped frame member 60 and an I-shaped frame member 60. It can also be constructed by combining the constituent members 60 or by combining four I-shaped frame constituent members 60.

In either case, from the perspective of simplifying manufacturing and reducing material loss, the structure can be completed by simply cutting a rectangular original fabric along its length and inserting a fold line (break line) at the required position. It is preferable that

Similarly to the embodiment described above, when the frame body 10 is constructed using the frame body constituent member 60, the restriction member 40 that restricts the movement of the filter medium 30 can be provided on the frame body 10. The same restrictor 40 as in the embodiment described above can be used, and the number thereof may be one or two or more. By providing the restrictor 40, the same effects as in the embodiment described above can be achieved. The restrictor 40 may be provided as necessary, and can be omitted if unnecessary.

In each of the above embodiments, the air filter is square as an example, but the shape of the air filter can be any shape depending on the purpose, installation location, etc., and is not limited to the square shape. . Depending on the case, it may be a polygon other than a quadrangle, a circle, or other shapes.

The configuration of the air filter of this embodiment is an example, and the air filter 50 of the present invention is not limited to the configuration of this embodiment. The air filter 50 of the present invention can be modified such as omitting, replacing, or adding the configuration without changing the gist thereof.

(Example of use)
Finally, a usage example of the air filter 50 of the present invention will be described. FIG. 8 shows an example in which the air filter 50 of this embodiment is installed in a painting booth. In FIG. 8, B is a painting booth, 50 is an air filter, and S is a suction fan. Overspray generated during painting is sucked to the underfloor side by a suction fan S and captured by an air filter 50 located in front of the suction fan S.

The air filter 50 of the present invention can be widely used not only in paint booths but also in various factories, kitchens, clean rooms, and other situations where air filters are required.

10 Frame body 11 Front part 12 Back part 13 Right side part 14 Left side part 15 Top part 16 Bottom part 17 Storage part 18 Notch part 19 Mountain fold line 20 Opening part 21 Reinforcement part 22 Falling prevention device 30 Filter medium 40 Regulating device 41 Male member 42 Female member 50 Air filter 60 Frame component 60a Front component 60b Rear component 60c Side component 61 First side 62 Second side 63 Joint piece B Painting booth F Mounting frame S Suction fan

Claims (7)

In an air filter in which a block-shaped filter medium is housed in a housing inside a frame,
The frame body has openings on the front part and the back part,
A net-like falling-off prevention device is provided in the openings of both the front part and the back part to prevent the filter medium from falling off.
An air filter characterized by: The air filter according to claim 1,
The frame is made of paper.
An air filter characterized by: The air filter according to claim 1 or 2,
The frame body is box-shaped and includes a right side part, a left side part, a top part, and a bottom part that are continuous with the front part and the back part,
A mountain fold line is provided on each of the right side surface portion, the left side surface portion, the top surface portion, and the bottom surface portion along the longitudinal direction of each surface portion.
An air filter characterized by: The air filter according to any one of claims 1 to 3,
Reinforced parts are provided on the front and back parts,
An air filter characterized by: The air filter according to claim 4,
The frame body is equipped with a regulating device that regulates the movement of the filter medium.
An air filter characterized by: The air filter according to any one of claims 1 to 5,
The frame is constructed by joining one or more elongated frame members in a ring shape.
An air filter characterized by: The air filter according to claim 6,
The frame component includes a side component, a front component, and a back component.
An air filter characterized by:

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