JPH1147531A - Filter member for treating indoor air - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a filter element freely exchangable and to mount it without requiring a special attention and making a mistake on the front and the back of a filter material when the filter element is mounted in a frame body as a filter member for cleaning indoor air of an automobile, etc. SOLUTION: A rectangular frame body 11 made of a synthetic resin provides inward brims 11b on the lower side of side walls 11a and a plurality of right- angled triangle projections 11c which have each a base side of the inward brim side and the hypotenuse inclined therefrom so as to open upward of the frame body 11 on the insides of the side walls 11a of both ends and trapezoidal side plates 12b in which both end faces incline in accordance with the hypotenuse of the projection 11c in the frame body 11 and the surface side with a rough fiber texture of a filter material is a long side and the back side with a dense fiber texture is a short side are fixed on both sides of a corrugated filter medium 12a to prepare a filter element 12 and the end faces of the side plates 12b are brought into contact with the inclined faces of the projections 11c to insert the element 12 into the frame body 11 and a lid frame 13 is applied thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a filter member for purifying air in a room such as an automobile, an office, and a hospital.

[0002]

2. Description of the Related Art For example, in an automobile, a blower B is provided inside an air guide duct D made of a synthetic resin or an iron plate or the like provided on the lower side of an instrument panel or the like as shown in FIG. , A filter F, an evaporator E, a heater H and the like are sequentially arranged, and the intake A is operated by the operation of the blower B.
From outside air a ₁ and indoor air a ₂ at a predetermined ratio,
This is first purified by a filter F, and a rear evaporator E is used.
Or heated by the heater H to send clean air at a desired temperature into the vehicle interior.

[0003] By the way, in this air conditioner, a filter member in which a filter element performing a filtering function and a frame body performing a supporting function are integrally formed by resin insert molding has been used in many cases. From the viewpoint of re-use of the filter member, an outer frame made of a synthetic resin and a filter element that can be separated at the time of maintenance replacement of the filter member are used.

FIGS. 7 and 8 show the filter member F, which comprises a rectangular frame 1, a filter element 2 and a lid frame 3, and the frame 1 is made of polypropylene, polyethylene, ABS resin, nylon or the like. Formed of synthetic resin,
On the back side (the lower side in the figure) of the surrounding side wall 1a, an inward flange 1b for receiving an element is provided and, in some cases, has longitudinal and lateral ribs connecting the middle, while the filter element 2 has: A rectangular side plate 2b made of nonwoven fabric, urethane rubber, kraft paper, or the like is provided on both sides of a filter material 2a obtained by mixing activated carbon particles to have a deodorizing function, or a series of nonwoven fabrics or filter papers not mixed to be wavy pleated. The lid frame 3 is made of the same synthetic resin as the frame body 1 and is formed in a size that can be fitted inside the upper portion of the frame body 1. At this time, a plurality of projections may be provided on the lid frame 3 as shown by a dotted line in FIG. 7, while a recess may be formed in the frame body 1 so that both are engaged.

[0005] Then, the filter element 2 is inserted into the inside of the frame 1, and the cover frame 3 is fitted over the filter element 2 to suppress the filter element 2, and as shown in FIG.
This is arranged in the air guide duct D along the guide rail from the lateral direction (perpendicular to the paper surface), and when a predetermined time has elapsed and the filter medium 2a is clogged, the duct D
, The cover frame 3 and the filter element 2 are removed from the frame 1, a new element is mounted on the frame, and the guide element D is set again.

[0006]

As described above, in the recent filter member F, the frame 1 and the filter element 2 can be separated, and the filter element 2 can be appropriately replaced on the user side. However, in the case of the above example, in order to capture the filter medium 2a dust of the filter element 2 smoothly and effectively, the portion on the front side (upstream side) with respect to the air flow is coarse, and the portion on the back side (downstream side) is rough. The parts are formed so as to be dense, and when the filter element 2 is mounted on the frame 1, the rough surface of the filter medium 2 a must be on the front side of the frame 1.

For this reason, usually, the filter element 2
Arrows, letters, and symbols are displayed on a part of the side plate 2b as shown in FIG.
Relies on the user's attention to ensure that the media orientation is accurate
It is not always possible to secure 00%, and sometimes it is mounted in the wrong direction, so that the functions of dust removal and deodorization cannot be sufficiently exhibited.

Accordingly, the present invention provides a filter member for indoor air treatment which makes the filter element replaceable.
It is an object of the present invention to provide a filter element that can always be mounted accurately without requiring any special attention when mounting the filter element on a frame without making a mistake between the front and back of the filter medium.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a filter member for indoor air treatment. First, a rectangular frame made of synthetic resin is provided on the back side of a surrounding side wall for receiving an element. A right-angled triangular projection having an inward flange on the inner side of the side walls at both ends and having a hypotenuse that inclines so as to open toward the front side of the frame body therefrom is divided into a series or a plurality of projections. A trapezoidal side plate having a long side on the front side of the filter medium and a short side on the back side, both end faces of which are provided on both sides of the filter medium in which a series of nonwoven fabrics or filter papers are formed in a wavy shape corresponding to the oblique sides of the projections in the frame. The filter element is fixed to a frame, the end face of the side plate is brought into contact with the inner end face of the projection, and the filter element is mounted on the frame. The projections provided in the side walls at both ends of the While the filter element is formed in an arc shape or a trapezoidal shape, cutouts corresponding to the projections are provided at both ends of both side plates of the filter element, and end faces of the both side plates are brought into contact with inner end surfaces of the projections to form a filter element and a frame. Thirdly, the frame body is provided with an inward flange for receiving an element on the back side of the surrounding side wall, and the side walls at both ends are inclined so as to narrow toward the back side. On both sides of a filter medium formed by forming a series of non-woven fabrics or filter paper in a wavy shape, a trapezoidal shape in which both ends are long sides on the front side of the tilted filter medium and short sides on the back side corresponding to the inclined side walls at both ends of the frame. The side plate is fixed to form a filter element, and the end surface of the side plate is brought into contact with the inner surface of the inclined side wall so that the filter element is mounted on the frame.

[0010]

FIG. 1 shows an example of a filter member F according to the present invention, in which a rectangular frame 11 is formed of a synthetic resin such as polypropylene, polyethylene, ABS resin or nylon. An inward flange 11b for receiving an element is provided on the back side (lower side in the figure) of the side wall 11a of the
The inside of the side walls 11a at both ends in the longitudinal direction, the inward flange 11b is formed on both sides and the center at the bottom and the height is the side wall 11b.
A right-angled triangular projection 11c having a side slightly lower than the inner diameter of a and inclined toward the front side of the frame body 11 is formed.

The filter element 12 comprises a filter medium 12a and a side plate 12b. The filter medium 12a is obtained by mixing activated carbon particles to have a deodorizing function, or by pleating a series of nonwoven fabric or filter paper containing no activated carbon. As described above, the portion that becomes the front side (upper surface in the figure) with respect to the flow of the processing air is coarse, and the portion that becomes the back side (lower surface) is made dense, and the nonwoven fabric is provided on both sides in the width direction. , Urethane, kraft paper, etc., frame 1 at both ends
1 has a trapezoidal shape having the same oblique side as the oblique side of the right-angled triangular projection 11c provided inside the both side walls 11a, that is, the coarse front side of the filter medium 12a has a long side and the dense back side has a short side. A trapezoidal side plate 12b is fixed by a hot-melt type, vinyl chloride-based, or epoxy-based adhesive.

The lid frame 13 is made of the same synthetic resin as that of the frame body 11 and is formed in such a size that it can be fitted inside the upper part of the frame body 11. At this time, as shown in FIG. While a plurality of protruding pieces are provided, a corresponding recess may be formed in the frame so as to engage the two.

Therefore, when the filter element 12 is inserted into the frame 11 from above, the side plate 12b as shown in FIG.
Of the filter medium 12a and the center of both ends of the filter medium 12a.
The filter element 12 is housed in a state in which it contacts the oblique side of the projection 11c inside the side wall, that is, the inner end face, and the filter element 12 is suppressed by fitting the lid frame 13 into the frame 11 from above. The member F is formed.

As described above, the filter member F is disposed and used in the air guide duct as described above, and when the filter medium 12a is clogged with the lapse of a predetermined time, the filter member F is removed from the guide duct. Both from the frame 11 to the lid frame 13
And the filter element 12 are removed, a new filter element 12 is mounted on the frame 11, and the filter element 12 is used again.

In the above process, when the filter element 12 is mounted on the frame 11, the filter element 12 is turned upside down as shown by the dashed line in FIG. Since the long side edge of the side plate 12b abuts on the oblique side of the projection 11c in the frame body 11 and cannot be inserted, an erroneous operation can be immediately noticed. There is no danger of the frame 11 being attached to the frame 11 in the wrong direction.

Also, as shown by a dotted line in FIG. 1, an inward projecting piece 14 of a required length is provided at the center of the longitudinal side wall 11a of the frame body 11.
Is formed, the lid frame 13 for suppressing (preventing the filter element 12 from being removed) the filter element 12 is not required. In this case, the frame 11 is bent while the filter element 12 is curved in the width direction.
It will be attached to.

The right-angled triangular projections 11c provided on the side walls 11a at both ends of the frame 11 may be omitted at the center and may be provided only at both sides, or as a series of long projections 11c as shown in FIG. Good.

The filter element 12a of the filter element 12
The means for ensuring the front and back (coarse and dense) directions are not limited to those described above, and the projections 11c in the frame side wall 11a are formed in a square shape as shown in FIG. Or a rectangular notch 12c corresponding to this is provided at the end, or the projection 11c is formed in an arc shape and the side plate 12b is formed in the notch 12c as shown in FIG.
c is also a combination of arcs, or the protrusion 11c is trapezoidal as shown in FIG.
2c may be a trapezoidal combination corresponding to this. In any case, the filter element 12 is turned upside down and cannot be mounted on the frame 11, and the long side of the side plate 12b where the notch 12c does not exist indicates the front side of the filter medium 12a.

FIG. 5 shows side walls 11a at both ends of the frame 11.
A modified example in which the filter element is tilted so as to narrow toward a rear side (lower side) at a predetermined angle so as to have the same effect as the above-mentioned projection is shown.
2 is the same as that of FIG.

In the above-described example, the case where the filter member F purifies the air in the cabin of the automobile has been described. However, the present invention is not limited thereto, and the filter member F of the present invention purifies the air in the office, hospital or home. You can use it if you want.

[0021]

According to the present invention, the filter member for indoor air treatment is constructed as described in claims 1 to 3, so that the producer and the user pay special attention to assembling the filter member and replacing the filter element. The filter element can be accurately and efficiently assembled to the filter element frame without requiring the force without erroneously turning the front and back of the filter medium, and if the frame is configured as in claim 3, Since there is no need to provide a projection on the inside of the side wall, there is an advantage that the molding die is simple and molding is easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an example of a filter member according to the present invention.

FIG. 2 is a sectional view of a state where a filter member is assembled.

FIG. 3 is a perspective view of a part of an example in which a series of right triangular protrusions are provided on a side wall.

FIG. 4A is a partial side view of an example in which a protrusion on a side wall of a frame body and a cutout on a side plate of a filter element are formed in a square shape.
(B) is a partial side view of an example in which the projection on the side wall of the frame and the cutout of the filter element side plate are arc-shaped. (C) is a partial side view of an example in which the protrusion on the side wall of the frame and the cutout of the filter element side plate are trapezoidal.

FIG. 5 is a perspective view of a part of the frame body in which the side wall itself at the end is tilted downward;

FIG. 6 is a side view showing a use state of the filter member.

FIG. 7 is an exploded perspective view of a conventional filter member.

FIG. 8 is a sectional view of a conventional filter member.

[Explanation of symbols]

 Reference Signs List 11 frame body 11a side wall 11b inward flange 11c projection 12 filter element 12a filter medium 12b side plate 13 lid frame F filter member

Claims (3)

[Claims] 1. A rectangular frame made of a synthetic resin and a filter element mounted inside the frame. The frame has an inward flange for receiving an element on the back side of a peripheral side wall, and a side wall on both ends. On the inside, a right-angled triangular protrusion having a hypotenuse that slopes so as to open toward the front side of the frame from the inward brim side as the bottom side is provided in series or in plurals, and a series of nonwoven fabric or filter paper is wavy. On both sides of the filter media formed in
Both end surfaces correspond to the oblique sides of the protrusions in the frame, and the trapezoidal side plate having the front side of the inclined filter medium as the long side and the back side as the short side is fixed to form a filter element, and the end face of the side plate is formed as the filter element. A filter member for indoor air treatment, wherein a filter element is mounted on a frame by abutting an inner end surface. 2. A projection provided in a side wall at both ends of a synthetic resin frame body is formed in a square shape, an arc shape or a trapezoidal shape, and cutouts corresponding to the projections are provided at both ends of both side plates of the filter element. 2. The filter member for indoor air treatment according to claim 1, wherein the end faces of the both side plates are in contact with the inner end faces of the projections to mount the filter element on the frame. 3. A rectangular frame made of synthetic resin and a filter element mounted inside the frame. The frame has an inward flange for receiving an element on the back side of a peripheral side wall, and side walls at both ends. On both sides of a filter medium formed by forming a series of non-woven fabric or filter paper in a wavy shape, both end faces are inclined corresponding to the inclined side walls at both ends of the frame body, and the front side of the filter medium is long side. A trapezoidal side plate having a short side on the back side is fixed to form a filter element, and an end surface of the side plate is brought into contact with the inner surface of the inclined side wall to mount the filter element on the frame. Characteristic filter member for indoor air treatment.