JP2001170433A - Filter device for cleaning air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce assembling cost of a filter device for cleaning air using a corrugated filtration type filter material. SOLUTION: Relating to the filter deice in which a pair of a first frame body 4 and a second frame body 5 are cladded and fitted so as to be separable from the front and back surface sides at the peripheral part of the filter material 3 folded in triangle wave shaped, after fitting the filter material 3 to the second frame body 5, a projecting part 6 provided projectingly to the inner surface of a surface frame part 4'a of the first frame body 3 is restrained at a valley part (m) of the corrugated peripheral part 3a of the filter material 3 to uniformize wave pitch (p) and to stabilize corrugated plate shape and the leakage of air is suppressed by blocking the end surface opening of the corrugated peripheral part 3a of the filter material 3 by fitting and inserting a side frame part 4"a of the first frame body 3 between the side frame part 5"a of the second frame body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device using a corrugated filter material widely used for air conditioning and air purifiers. More specifically, the present invention relates to a filter device having a pleated corrugated filter material. The present invention relates to an air purifying filter device in which a reinforcing frame is fitted to a peripheral portion.

[0002]

2. Description of the Related Art Generally, a filter material for purifying air is a filtration type filter material in which a material such as a nonwoven fabric or filter paper is pleated in a wave shape to increase the surface area through which air passes. As shown in FIG. 14, for example, this type of filter material is manufactured by alternately bending a large-area nonwoven fabric or filter paper in the opposite direction at a constant pitch in the width direction and pleating it into a triangular wave shape.

[0003] In the corrugated filter material 1 shown in Fig. 14, the air purification function is reduced if the corrugated surface has a non-uniform wave pitch p. The product is fixed and fixed by the hot melt method. Alternatively, in the case of a wavy filter material for a special purpose (not shown), a rectangular wooden frame is integrally attached to a peripheral portion thereof with an adhesive or the like, and the shape of the wavy filter material is fixed to the wooden frame as a wooden frame filter device. Has been

[0004] The reinforcing material 2 shown in FIG.
Of the filter material 1 is maintained constant, and the overall dimensional shape is stabilized. That is, assuming that the wave direction of the wavy filter material 1 is the horizontal direction, the filter material 1 expands and contracts in the horizontal direction and the shape is not stable. Even if a rectangular frame is tentatively fitted and reinforced on the two straight peripheral portions 1b, the wavy filter material 1 expands and contracts with respect to the frame and comes off the frame, or in the lateral direction of the filter material 1. In this case, the reinforcing member 2 for fixing the wave pitch p is fixed to the open end face of the wavy peripheral portion 1a of the filter material 1 because the wave pitch p of the filter material becomes irregular in magnitude. This type of reinforcing material 2 is a tape or a line that does not expand or contract. In the case of a tape, the reinforcing material 2 closes the opening of the end surface of the wavy peripheral portion 1a of the filter material 1, and suppresses the leakage of air from the opening end surface. Enhance the filtration performance and air purification function of the entire filter material.

[0005]

The above-mentioned single wave filter material can be easily mass-produced and can be manufactured at low cost. However, it is difficult to secure a reinforcing member or a wooden frame for stabilizing the shape of the wave filter material. The workability is poor, and it is difficult to reduce the manufacturing and assembling cost of the filter device using the wavy filter material. Further, the number of parts of the air cleaning filter material alone increases due to the reinforcing material, and the material cost increases accordingly. In particular, those using a wooden frame filter material are thick and bulky, which increases transportation costs, and has many problems in terms of temperature control of an adhesive with a wooden frame at the time of disposal and recycling of the filter material. It is a waste, and there is a problem that processing costs such as disposal are high.

Further, when the corrugated filter material becomes dirty, it is washed and regenerated, or discarded and replaced with a new one.
In the case of cleaning and regeneration, it is difficult to perform effective cleaning due to the complicated shape of the corrugated filter material, and there is a problem that the size of the regenerating apparatus is increased due to the complicated and bulky shape of the regeneration after cleaning. Further, when the dirty corrugated filter material is discarded and replaced with a new one, the following problems arise. The new filter material to be replaced is stored in a filter manufacturing factory, etc., shipped out of the factory and sold over the counter.However, such replacement filter material is obtained by fixing the wave pitch of the wavy filter material with a reinforcing material. Because the entire size is adjusted to the standard frame size to be reused, the filter material for replacement can be reduced to a smaller size than the standard frame size, stored, transported, and sold over the counter. It is difficult, and it is difficult to reduce the space for storing filter materials for replacement, the space for over-the-counter sales, and the reduction in transportation costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air purifying filter device in which manufacturing and assembly costs and transportation costs can be easily reduced, and a filter material can be advantageously washed and regenerated.

[0008]

The technical means for achieving the above object of the present invention is to provide a filter material which is pleated in a wave shape and a first frame and a second frame which can be assembled and separated from each other. A first frame body is inserted between an opening serving as a vent, a frame portion supporting a peripheral edge portion of the filter material, and an adjacent crest of a corrugated surface of the filter material, and the first frame body is pleated with the filter material. It has at least one projection that regulates the shape and dimension in the direction perpendicular to the fold line direction, the second frame has an opening serving as a vent, and a frame that supports the peripheral edge of the filter material, It is characterized by a structure in which the first frame and the second frame are accommodated with a filter material and assembled together.

Here, the first frame and the second frame are frames such as an aluminum frame and a resin frame, each of which is detachably fitted to the peripheral portion of the corrugated filter material, and the filter material is attached at the time of deposition. Reinforce to maintain its wavy shape. Further, as the filter material to which the first frame and the second frame are fitted and fitted, it is possible to use a single piece of filter paper or the like which is merely pleated in a wave shape. Then, it can be stretched in the shape of a cloth and washed easily and effectively, or it can be folded so as to minimize the wave pitch and stored in a minimum space.

Further, according to the present invention, the frame portion of the first frame has at least a surface frame portion for supporting a peripheral edge of one surface of the filter material, and a pleated fold line of the filter material of the surface frame portion is provided. A projection that regulates the shape of the filter material on the inner surface positioned in the direction, the frame portion of the second frame is a surface frame portion that supports the periphery of the other surface of the filter material, and an outer side of the surface frame portion And a side frame portion that stands in a bent shape from above and supports each side of the filter material.

Further, the present invention further comprises a side frame portion in which the first frame body stands up from the outer side of the face frame portion in a bent shape and supports each side of the filter material. And the side frame portion of the second frame body is inserted into each other so as to be assembled.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 8, and a second embodiment will be described with reference to FIGS.

The filter device for air cleaning according to the first embodiment shown in the exploded view of FIG. 1 includes a filter member 3 having a rectangular wave shape and a rectangular peripheral portion of the filter member 3.
A first detachably fitted from both the front and back sides of this peripheral portion.
It is composed of a frame 4 and a second frame 5. Filter material 3
For example, it is manufactured by alternately bending a material such as a long piece of nonwoven fabric or filter paper in the opposite direction at a constant pitch, pleating the material into a triangular wave shape, and cutting the material into a predetermined length. The peripheral edge of the rectangular filter material 3 is formed by two opposite sides of a wavy peripheral edge 3a in which valleys m and peaks n are alternately continued, and a straight peripheral edge 3b of the remaining two opposite sides. Desirably, the material of the filter material 3 is excellent in pleating workability, and is excellent in heat workability, in which the shape is not easily changed during washing, and excellent in heat resistance.
Further, the wave pitch p (the interval between adjacent peaks or the interval between adjacent valleys) of the filter material 3 before the pair of frames 4 and 5 are fitted is arbitrary, and the filter material 3 It can be extended or compressed in the plate direction.

The pair of first frame members 5 and second frame members 4 are frame members having substantially the same dimensions and made of a material such as aluminum or resin which can be washed many times and has excellent dimensional stability. The first frame body 4 includes, for example, a surface frame portion 4′a attached to the wavy peripheral portion 3a and a surface frame portion 4′b attached to the straight peripheral portion 3b from either one of the front and back surfaces of the filter material 3. A side frame portion 4 ″ a that extends integrally inward from the outer side of each of the surface frame portions 4′a and 4′b and is attached to the four sides of the rectangular shape of the filter material 3;
The second frame 5 has a surface 5′a attached to the wavy peripheral portion 3a and a surface attached to the straight peripheral portion 3b from one of the front and back surfaces of the filter material 3. A frame portion 5'b;
There are side frame portions 5 ″ a, 5 ″ b that extend integrally inward from the outer sides of the surface frame portions 5′a, 5′b and are attached to the four rectangular sides of the filter material 3.

Further, a projection 6 for regulating the corrugated shape of the filter material 3 is formed on each face frame portion 4'a of the first frame 4 attached to the corrugated peripheral portion 3a of the filter material 3. Protrusion 6
Are projectingly formed by stamping or the like at one location on the inner surface of the face frame 4′a or at a plurality of locations at equal intervals. In the drawing, a plurality of locations including the central portion in the longitudinal direction of one face frame 4′a Protruding part 6
Is formed. The shape and size of one protrusion 6 are set so as to be locked in one valley m of the wavy filter material 3 in the wave width direction, for example, as shown in FIG. The protrusion 6 is locked to each of the valleys m at arbitrary positions on the wavy peripheral portion 3a of the wavy filter material 3, whereby the expansion / contraction operation of the filter material 3 in the wave direction is regulated by the protrusion 6, and the filter material 3 Is maintained in a substantially regular corrugated plate shape having a predetermined wave pitch p. The number of such protrusions 6 may be set to the same number as the plurality of valleys m of the filter material 3, but setting the number to be smaller than the valleys m makes it easier to assemble the filter device described later. It is desirable in doing.

When the first frame 4 is an aluminum plate product,
For example, as shown in FIG. 6, an L-shaped cross-section frame 4c having a face frame 4'a and a side frame 4 "a, a face frame 4'b and a side frame 4" b
If the end faces of the L-shaped cross-section frames 4d are butted at right angles to each other and the butted portions are connected by an L-shaped connecting plate 4e made of aluminum, the first frame 4 is manufactured in a rectangular shape. Can be manufactured well. The second frame 5 may be manufactured similarly to the first frame 4.

The first peripheral portion of the rectangular shape of the corrugated filter material 3
FIG. 2 shows a filter device in which the frame 4 and the second frame 5 are fitted, and FIGS. 3 and 4 show cross-sectional views thereof. To assemble this filter device, first, the wavy filter material 3 is attached to the second frame 5.
Is fitted from one of the front and back sides of the peripheral portion, and then the first frame 4 is fitted from the other side of the peripheral portion of the filter material 3. The fitting of the two frame members 4 and 5 from both the front and back sides of the filter material 3 is performed by attaching the side frame portions 4 ″ a and 5 ″ a and the side frame portions 4 ″ b and 5 ″ b to the filter material 3. In a state of being superimposed along the rectangular end face of the above, and being connected to each other in a separable and separable manner.

For example, as shown in FIG. 3, when the peripheral portion of the corrugated filter material 3 is fitted to the second frame 5, the whole is substantially horizontal and the second frame 5 is moved in the wave direction of the corrugated filter material 3. By vibrating manually in a certain lateral direction, the entire wave pitch p of the filter material 3 is made uniform. At this time, the filter material 3 vibrates right and left in the wave direction while the corrugated peripheral portions 3a of the two opposing sides are almost freely held on the surface frame portion 5′a of the second frame 5, and the corrugated plate The wave pitch p is equalized by the elastic restoring force. Next, the first frame 4 is covered from directly above the substantially horizontal second frame 5, the two frames 4, 5 are united, and both are detachably engaged as they are.

It is desirable that the combination of the two frame members 4 and 5 be performed as follows for the reason described below. That is, the slits 7 formed at both ends of the side frame 4 ″ a of the first frame 4 shown in FIGS. 1 and 5 are inserted into both ends of the side frame 5 ″ b of the second frame 5, The first frame is formed on the outer surface of the side frame portion 5 ″ b of the second frame body 5.
The side frame 4 ″ b of the frame 4 is superimposed, and the inner surface of the side frame 5 ″ a of the second frame 5 and the filter material 3 as shown in FIG.
Between the end faces of the wavy peripheral portion 3a of the first frame 4
a is inserted.

The side frame 4 "b of the first frame 4 is inserted so as to overlap the outer surface of the side frame 5" b of the second frame 5 on which the filter material 3 is fitted as described above. Thus, the first frame 4 can be easily fitted to the second frame 5 without being disturbed by the straight peripheral portion 3b of the filter material 3. The side frame 4 ″ a of the first frame 4 is fitted between the side frame 5 ″ a of the second frame 5 to which the filter material 3 is fitted and the end face of the wavy peripheral portion 3a of the filter material 3. By inserting the filter material 3, the side frame 4 ″ a of the first frame 4 directly closes the opening end face of the wavy peripheral portion 3 a of the filter material 3, and suppresses the leakage of air from the opening of the end face to prevent the filter material 3. To make the air purification function stable and good.

Here, as shown by the dimension drawing line in FIG. 1, the distance between the two side frame portions 5 "a of the second frame 4 opposite to each other is L.
And D is the length of the filter material 3 in the direction of the wavy line.
It is desirable to restrict L in the range of D to (D-0.5 mm). The side frame portion 4 "a of the first frame member 4 is located between the side frame portion 5" a of the second frame member 5 in which the filter material 3 is fitted by the size restriction and the end surface of the wavy peripheral portion 3a of the filter material member 3. Can be reliably inserted with good workability, and the side frame portion 4 ″ a of the first frame member 4 hermetically closes the opening end surface of the wavy peripheral portion 3a of the filter material 3, and air leaks from this end surface opening. Is effectively suppressed, and the air purifying function of the filter material 3 is made more stable and good.If L> D, the wavy shape of the side frame portion 4 ″ a of the first frame 4 and the filter material 3 is obtained. A gap is formed between the end faces, the amount of air leakage increases, and the air purification function of the filter material 3 decreases. If L <(D−0.5 mm), the side frame portion 4 ″ a is caught on the wavy peripheral portion 3a of the filter material 3 when the first frame 4 is inserted into the filter material 3, and the first frame 4 The work of assembling the body 4 to the second frame 5 becomes difficult.

The side of the first frame 4 is located between the side frame 5 "a of the second frame 5 on which the filter material 3 is fitted as described above and the end surface of the wavy peripheral portion 3a of the filter material 3. By fitting the frame portion 4 ″ a, the projection 6 of the surface frame portion 4′a of the first frame body 4 is inserted.
Is locked in the valley m of the filter material 3 and the filter material 3
Becomes stable. Although not shown, if a projection similar to that of the first frame is also formed on the second frame, the wavy filter material fitted to the second frame is vibrated left and right as described above to reduce the wave pitch. When equalizing, the second
Since the protrusion of the frame interferes with the work of equalizing the wave pitch, it is effective to provide the protrusion only on one of the first frames.

In the air purifying filter apparatus shown in FIG. 2, when the filter material 3 is contaminated by dust or the like and the air purifying function is deteriorated, the first frame 4 and the second frame 5 are separated and the filter material 3 is separated. Removed and only the dirty filter material 3 is discarded or washed and recycled as described below.
Each of the pair of frames 4, 5 is reused for a new or recycled filter material. A new replacement filter material is, for example, a corrugated filter material 3 'shown in FIG. Since the replacement filter material 3 ′ is expandable and contractible in the width direction of the uneven wave, it can be reduced in the width direction, stored in a state of a minimum size and a minimum volume, transported, and sold over the counter. This is desirable in terms of reducing the space for storing replacement products and the space for over-the-counter sales, and reducing transportation costs.

The washing for recycling the dirty filter material 3 can be performed, for example, in each step shown in FIG. First, 60-70 ° C. in the pre-washing tank 11 while stretching the dirty single wavy filter material 3.
After pre-cleaning by immersion in an alkaline cleaning liquid, the main cleaning is performed by applying high-pressure spray with cleaning water at 60 to 70 ° C. in the main cleaning tank 12 and applying ultrasonic vibration. Mainly washed filter material 3
Is rinsed in a rinsing tank 13 with a high-pressure spray by a water stream containing an antifouling agent at room temperature, and then the filter material 3 is passed through a dewatering roller 14 to be forcibly dewatered at room temperature.
And forced drying with hot air at 90 to 100 ° C. By continuously washing and drying while stretching the corrugated filter material in a cloth shape in this manner, high-speed cleaning in a small space is facilitated, and the recycling of the corrugated filter material is facilitated.

Next, an air cleaning filter device according to a second embodiment shown in FIGS. 9 to 13 will be described. The basic structure of the filter device of the second embodiment is the same as that of the first embodiment of FIG. 1, and the same reference numerals as those in the filter device of FIG. To avoid duplication of explanation.

The first frame 4 and the second frame 5 in the filter device shown in FIGS. 9A and 9B are, for example, resin molded products. As shown in FIGS. 10 and 11, the first frame 4 has rectangular surface frame portions 4'a and 4'b, and the surface frame portions 4'a and 4'b It comes into contact with the peripheral edge on one side. As shown in FIGS. 12 and 13, the second frame 5 has rectangular surface frame portions 5 ′ a, 5 ′ b, and side frame portions 5 ″ a, 5 ″ b integrally bent from respective outer sides thereof.
The surface frame portions 5'a and 5'b abut against the peripheral edge portion on the other surface side of the rectangular filter material 3, and the side frame portions 5 "a and 5" b
Are opposed to the rectangular end surface of the filter material 3.

The second embodiment shown in FIG.
Surface frame 5′b of the second frame 5 corresponding to the straight peripheral portion 3b
A locking plate 5c is integrally formed in an upright shape on the inner surface of the frame, and a locking groove 5d having a predetermined width is formed between the locking plate 5c and the side frame portion 5 "b opposed thereto. It is characterized in that the straight peripheral portion 3b of the filter material 3 is inserted and temporarily held in the groove 5d.The height of the locking plate 5c from the surface frame portion 5'b is the height of the side frame portion 5 "b. It is set lower than the filter material 3 by the thickness of the filter material 3. The width of the locking groove 5d is set to about several times the thickness of the filter material 3, and the locking groove 5d has a straight peripheral portion of the filter material 3 as shown in FIG. 9 (A) or (B). 3b
One or two sheets are inserted into the outer side of the sheet.

When the corrugated filter material 3 is manually fitted to the second frame 5, as shown in FIG. 7, the compressed filter material 3 is expanded to a specified size with both hands, and straight edges at both ends are formed. 3b is inserted into the corresponding locking groove 5d. For example, as shown in FIG. 9 (A), the outermost sheet of the straight peripheral portion 3b of the filter material 3 is inserted into the locking groove 5d,
The valley m between the first and second sheets is locked to the locking plate 5c. Alternatively, as shown in FIG. 9 (B), the outermost one of the straight peripheral portion 3b of the filter material 3 and the next second sheet are inserted into the locking groove 5d in a state of being overlapped, and the second sheet is formed. The valley m between the third sheet is locked to the locking plate 5c.

As shown in FIGS. 9 (A) and 9 (B), the straight peripheral portions 3b at both ends of the filter material 3 are locked and temporarily held by the locking plate 5c, so that the The filter material 3 is held at the specified size, and the filter material 3
Can be easily and quickly performed. Also, the second
The filter material 3 is held in the frame 5 in a prescribed size, and the shape is stabilized by being inserted into the locking groove 5d because the straight peripheral portion 3b whose shape has not been stabilized due to expansion and contraction or the like becomes stable. The work of assembling the first frame 4 to the second frame 5 is facilitated.

The first embodiment in the second embodiment shown in FIG.
The frame 4 preferably has a shape shown in FIGS. 10 and 11 corresponding to the second frame 5 having the locking plate 5c. That is, the rectangular surface frame portions 4′a and 4′b of the first frame body 4 are reinforced with the rib portions 4c integrally bent on the outer side of the outer surface thereof,
A projection 6 for regulating the shape of the filter material 3 is formed on the inner surface of the surface frame 4'a corresponding to the wavy peripheral portion 3a of the wavy filter material 3.
Are formed integrally, and the straight peripheral portion 3b of the wavy filter material 3 is formed.
The locking groove 5 of the second frame 5 is formed on the inner surface of the surface frame 4'b corresponding to
4d is integrally formed with the protruding piece 4d.

As shown in FIG. 9, the locking grooves 5 are formed in the second frame 5.
d, the filter material 3 is fitted, and then the second frame 5
When the first frame 4 is fitted into the first frame 4, the protrusion 4 d of the first frame 4
Is inserted into the locking groove 5d, and the straight peripheral edge 3b of the filter material 3 previously inserted into the locking groove 5d is fixed to the locking plate 5 by the protruding piece 4d.
c. By doing so, the straight peripheral portion 3b of the filter material 3 easily sandwiched between the frame members 4 and 5 is easily fixed, and the deformation of the corrugated filter material 3 is reliably prevented.

In the first frame 4 shown in FIGS. 10 and 11, a grid frame 4e is integrally formed on the inner side of the rectangular surface frame portions 4'a and 4'b, and the filter material 3 is formed. To prevent falling off. Similarly, in the second frame 5 shown in FIGS. 12 and 13, the rectangular surface frame 5 ′ is also provided.
Although the lattice frames 5e are formed integrally with the lattice frames a and 5'b, these lattice frames 4e and 5e are not necessarily required.

The present invention is not limited to the above-described embodiment. In particular, the shapes of the first frame and the second frame are appropriately changed depending on the materials. For example, each side of the end face of the filter material is provided on the second frame. When the side frame portion for supporting the filter member is provided, it is not always necessary to provide a similar side frame portion on the other first frame body, and the first frame body has a surface frame portion having a protrusion for regulating the shape of the filter material. It is also possible to configure only with.

[0034]

According to the present invention, a pair of first and second frame members are detachably fitted to each other from both front and back sides of the peripheral portion of the corrugated filter material, and the protrusion of one of the frame members is formed. Was fixed to the valley of the corrugated peripheral portion of the filter material, and the filter material was reinforced in a fixed form while the filter material was held in a predetermined corrugated shape. It is easy to mass-produce and can use low-cost single items.
It is possible to reduce material costs and manufacturing and assembly costs of the filter device. Further, the first frame and the second frame can be easily separated from the filter material, and the filter material separated from the frame can be easily stretched into a cloth, washed and dried, and the filter can be easily filtered. Recycling of materials and space saving of recycling equipment are facilitated. In addition, since the replacement of the dirty filter material is also a stretchable corrugated filter material, this replacement can be reduced to a size smaller than the frame size, and can be packaged, stored, over-the-counter sales, etc. As a result, it is possible to reduce storage and transportation costs of the replacement filter material, and to reduce storage space and store sales space.

Further, by forming a retaining groove in which the straight peripheral portion of the wavy filter material is fitted and temporarily held in the second frame, the straight peripheral edge of the wavy filter material which expands and contracts and whose shape is not stable is formed. When the shape of the part is fitted to the second frame, it is stable,
The work of attaching the corrugated filter material to the second frame is facilitated, and the work of attaching the first frame to the second frame is also easy without being disturbed by the filter material. Work can be improved.

Further, the first frame body and the second frame body are overlapped at the end face of the peripheral edge portion of the corrugated filter material, and the first frame has a projection which is engaged with the valley portion of the corrugated peripheral portion of the filter material. By closing the opening at the end face of the wavy peripheral part of the filter material with the side frame part of the frame body, the leakage of air from the opening end face of the wavy peripheral part of the filter material is suppressed, and the air cleaning of the entire filter material is performed. Functions are enhanced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an air cleaning filter device according to a first embodiment of the present invention.

FIG. 2 is a perspective view after assembling the filter device of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line T1-T1 of FIG. 2;

FIG. 4 is a sectional view taken along the line T2-T2 in FIG. 3;

FIG. 5 is a partially enlarged perspective view of a first frame and a second frame in the filter device of FIG. 1;

FIG. 6 is a partial perspective view of a first frame in the filter device of FIG. 1;

FIG. 7 is a perspective view of the filter device in FIG.

FIG. 8 is a side view showing an outline of a filter material washing / drying step system.

FIGS. 9A and 9B are partial cross-sectional views of an air cleaning filter device according to a second embodiment of the present invention.

FIG. 10 is a bottom view of the first frame in the filter device of FIG. 9;

FIG. 11 is a sectional view taken along the line T3-T3 of FIG. 10 and a partially enlarged view thereof.

FIG. 12 is a plan view of a second frame in the filter device of FIG. 9;

FIG. 13 is a sectional view taken along the line T4-T4 of FIG. 12 and a partially enlarged view thereof.

FIG. 14 is a perspective view of a wavy filter material in a conventional air cleaning filter device.

[Explanation of symbols]

 Reference Signs List 3 Filter material 3a Wavy peripheral part 3b Straight peripheral part m Valley part n Peak part 4 First frame 4'a, 4'b Frame, face frame 4 "a, 4" b Frame, side frame 5 Second frame 5'a, 5'b Frame, face frame 5 "a, 5" b Frame, side frame 5c Lock plate 5d Lock groove 6 Projection

Claims (6)

[Claims] 1. A filter material comprising a filter material which is pleated in a wavy shape, and a filter frame comprising a first frame and a second frame which can be assembled and separated from each other. An opening, a frame supporting the peripheral edge of the filter material, and a crest between adjacent ridges of the wavy surface of the filter material to regulate the shape and dimension of the filter material in a direction perpendicular to the pleated fold line direction. The first frame and the second frame having at least one projection, the second frame having an opening serving as a vent, and a frame supporting a peripheral portion of the filter material; An air purifying filter device in which the body and filter material are housed and assembled together. 2. The frame portion of the first frame body has at least a surface frame portion that supports a peripheral edge of one surface of the filter material, and the surface positioned in a pleated folding line direction of the filter material. The projection of the second frame body has the projection on the inner surface of the frame, and the frame of the second frame supports the periphery of the other surface of the filter material, and is bent from the outer side of the surface frame. The air purifying filter device according to claim 1, further comprising a side frame portion that stands up and supports each side of the filter material. 3. The first frame body further includes a side frame portion that stands in a bent shape from an outer side of the surface frame portion and supports each side of the filter material, and a side of the first frame body. The air purifying filter device according to claim 2, wherein the frame portion and the side frame portion of the second frame body are assembled so as to be inserted into each other. 4. A pleated line parallel to the pleated line of the filter material on an inner surface of the surface frame portion of the second frame body parallel to the pleated line of the filter material and the side frame portion rising from the surface frame portion. 4. The filter device for air purification according to claim 2, wherein a locking plate forming a locking groove for temporarily holding the straight peripheral portion when the straight peripheral portion is inserted is integrally formed. 5. A peripheral portion of the filter material, wherein a side frame portion of the first frame is incorporated into a corresponding inner surface of a side frame portion of the second frame in a pleated folding line direction of the filter material. The air purifying filter device according to claim 3, wherein a first frame and a second frame are attached to the filter. 6. A filter frame for use in the air purifying filter device according to claim 1.