JPH06241516A - Filter for ventilation device - Google Patents

Abstract

PURPOSE:To provide an improved filter for a ventilation device wherein, in addition to a raising of a filter performance by an optimization of a shape of the filter, silencing of an operation noise can be achieved and further an possibility that the filter itself can be thrown away in a resources saving manner when the filter is replaced and thrown away, can be obtained. CONSTITUTION:In a filter for a ventilation, the filter being assembled together with a motor, a fan and a fan cover in a frame of an ventilation device and the filter being used after being folded in a zigzag form, a periphery of the filter 8 which is folded in a zigzag shape, is not fixed by the frame but the top edge of the zigzag line of the filter 8 is connected by a band 8D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a ventilation device that effectively exhausts oil smoke.

[0002]

2. Description of the Related Art A ventilator normally exhausts dirty air such as oily smoke with a blower that communicates with the outer wall of a building, but oily smoke makes the ventilator sticky and is not easy to clean.

Therefore, a filter is provided on the front of the fan, and when it becomes dirty, it is removed and washed, or a new one is replaced, but the latter disposable filter is often used because of its ease of handling.

Further, the filter of the ventilation device is usually a non-woven fiber filter, and mainly has a flat plate shape.

[0005]

However, the above-mentioned conventional flat-plate-shaped filter has a problem that the ventilation resistance of the filter tends to increase and the air flow rate decreases.

Since the structure is also weak in strength, it is necessary to fix the periphery with a cardboard, an aluminum frame, a synthetic resin frame, and when the filter is replaced and discarded, extra resources are discarded.
There was a problem that it was not suitable for disposal, such as discarding large things.

In addition to improving the filter characteristics by optimizing the shape of the filter, the present invention makes the operation noise quiet, and further, when the filter is replaced and discarded, the filter itself can be discarded in a resource-saving manner. It is intended to provide an improved ventilation filter.

[0008]

The object of the present invention is to provide a filter for a ventilation device, which is built in a frame of a ventilation device together with a motor, a fan, and a fan cover and is formed into a pleated shape for use. This is achieved by band-connecting the tops of the fold lines of the filter without fixing the frame around the filter.

[0009]

The wide area of the filter area due to the fold-fold filter brings about the effect of reducing the filter ventilation resistance due to the decrease in the passage speed and the improvement of the oil removal rate for the same air volume.

The vertical ridges of the folds of the fold-fold filter act effectively to quickly drop the oil downward.

Further, the fold-folding of the filter shape has an advantage that the distance between the filter and the fan can be appropriately separated, and the operation noise can be reduced, but when actually examined, There are the following problems.

That is, it was found that the holding force of the fold-fold filter shape was loosened due to the amount of heat of the ascending airflow of oil smoke during cooking, and gradually returned to a flat plate shape.

Further, since it is structurally weak in strength, it is necessary to fix the periphery with a cardboard, an aluminum frame, a synthetic resin frame, and when the filter is replaced and discarded, extra resources are discarded.
I mentioned earlier about discarding big things.

On the other hand, according to the present invention, the band connecting portion can be used as the filter holding portion by band-connecting the top portion of the fold line of the filter.

In addition, the filter is surrounded by cardboard,
Without fixing with aluminum frame or synthetic resin frame, and by configuring so that the band does not fill the space at the top and valley of the fold line, the filter with the filter cover is very flexible, The user can easily roll it up or fold it along the fold line to make it smaller and throw it away.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

4 and 5 showing the overall structure of the ventilation device, in the frame 1, a motor 2, a fan 3, a fan cap 4, a shutter 5, a fan cover 6, a filter cover 7 and a filter 8 are arranged. There is.

The motor 2 is supported by the frame 1.

Reference numeral 9 is an oil pocket.

1 to 3 show an embodiment of the filter of the present invention, and FIG. 6 shows a conventional flat plate type filter.

As shown in FIGS. 4 and 5, the filter 8
Are supported inside the filter cover 7.

An oil pocket 9 is provided on the lower side of the filter cover 7.
Is attached.

The oil pocket 9 serves as a pan for the oil that falls downward due to the vertical ridgeline effect in the fold portion of the filter 8.

The filter 8 of the present invention has a pleated shape so as to form a vertical ridge, and edge bars 8A are formed on the left and right end surfaces.

Reference numeral 8C is a filter engaging portion used when supporting the filter 8.

The upper and lower end surfaces 8B of the filter 8 are left as cut surfaces, or they are hardened with heat or an adhesive so as not to fray.

The fold-folding of the filter shape is performed by superposing a woven cloth or a weft thread on a non-woven fabric and bonding them by bonding, heat welding, stitching or the like. Use the holding power of.

Further, the fold-fold filter 8 connects the tops of the fold-fold lines with a band 8D of a plurality of lines, and as shown in FIG. 2, the band 8D has a space between the tops and valleys of the fold-fold lines. It is configured not to fill 8E.

In the prior art, there is one in which the top of the fold filter is fixed with tape, but on the other hand, the periphery of the fold filter is fixed with cardboard, an aluminum frame, a synthetic resin frame, etc. Similar to the example, when exchanging the filter and discarding it, there is a problem that it is not suitable for disposal in terms of discarding extra resources, discarding large ones, and the like.

Reference numeral 8F is a holding spring for easily attaching / detaching the filter 8 to / from the fan cover 6 or the filter cover 7. The filter engaging portion 8C may be directly fastened to the fan cover 6 or the filter cover 7 without using the pressing spring 8F. Alternatively, the end of the band 8D can be lengthened by about 10 mm, and this end can be used as the filter engaging portion 8C. In short, although the filter 8 is pulled by the suction force of the fan 3, the drag force of the fold shape and the drag force of the band 8D work together to form a bridge action, which prevents the filter 8 from being deformed.

A clip may be provided on the filter cover 7 of the ventilation device to support the filter engaging portion 8C by sandwiching it.

Further, by using an electret filter for the non-woven fabric, the ventilation resistance can be reduced and the collecting property can be improved.

As shown in FIG. 5, the distance L between the filter 8 and the suction side rotation surface of the fan 3 is important. This interval L
If is too close, the fan noise will increase. It is good for hydrodynamics that the distance L is separated, but the main body is large and uneconomical.
Moreover, the filter suction surface will be separated from the wall surface,
Smoke suction performance is deteriorated.

In the present invention, the top of the fold fold line of the fold fold filter 8 is connected and reinforced by the band 8D so that the holding force of the fold fold filter shape is loosened due to the amount of heat of the upward flow of oily smoke during cooking. Further, it does not gradually return to a flat plate shape, the smoke is hydrodynamically sucked in while maintaining the interval L appropriately, the sound is quiet, and the smoke exhaust efficiency is good.

The dimensional relationship of one embodiment of the present invention will be described below.

The fan diameter is 25 cm, and the flat area of the filter is 35 cm in width and 32 cm in length.

When the air volume is 700 m ³ / hour and the filter has a flat area, the wind speed is about 1.9 m / sec.

The fold shape of the filter has a folding width a of 8
mm, and the pitch P is also 8 mm. in this case,
The expanded area of the filter is about double that of the flat filter, and the wind speed converted into the expanded area can be reduced to about 1.1 m / sec. Therefore, the ventilation resistance of the filter is reduced, and the operating noise is also reduced. In addition, the clogging of the filter will also be loosened accordingly, and the replacement time of the filter can be doubled.

The pitch of the woven fabric to be superposed on the non-woven fabric is smaller than the pitch of the non-woven fabric and is 5 mm. The reason for this is that the squeezing function becomes weak when the filter is folded. This relationship is also desirable in the case of the weft thread attachment pitch, and the holding force when the filter is fold-folded can be made uniform by bonding by bonding, heat welding, sewing or the like.

The synthetic resin band 8D connecting the tops of the filter fold lines has a width of 3 mm and a height of 2 mm.
The band 8D and the top of the fold line are integrated by fusion.

[0041]

The widening of the filter area by the fold-fold filter 8 brings about the effect of reducing the filter ventilation resistance due to the decrease of the passage speed and the improvement of the oil removal rate for the same air volume.

The vertical ridge line of the fold portion of the fold filter 8 effectively acts to quickly drop the oil downward.
More specifically, the band 8D is configured so as not to fill the spaces 8E at the tops and valleys of the fold line, so that the oil collected by collision passes through this space and falls downward.
The oil dropped down can be removed and washed by the oil pocket function of the filter cover 7B, which is convenient.

Further, in the fold-folding of the filter shape, the space between the filter 8 and the fan 3 can be appropriately separated, and the operation noise can be reduced.

The band connecting portion can be used as a filter holding portion without fixing the periphery of the filter 8 with a cardboard, an aluminum frame or a synthetic resin frame.

In addition, the filter 8 is constructed so that the periphery thereof is not fixed with a cardboard, an aluminum frame or a synthetic resin frame, and the band 8D does not fill the spaces 8E at the tops and valleys of the fold line. The filter when removed from the filter cover 7 is highly flexible, and can be easily rolled by the user along the fold line or folded to be small and thrown away. That is, when the filter 8 is replaced and discarded, the resources can be discarded in a resource-saving manner without discarding extra resources or discarding large ones.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a filter of the present invention.

FIG. 2 is a detailed view of the filter shown in FIG.

FIG. 3 is a perspective view of the filter shown in FIG. 1 in a rolled state.

FIG. 4 is a partially cutaway front view of the ventilation device.

5 is a partially cutaway right side view of FIG. 4. FIG.

FIG. 6 is a diagram showing a conventional filter.

[Explanation of Codes] 1 ... Frame, 2 ... Motor, 3 ... Fan, 5 ... Shutter, 6 ... Fan cover, 7 ... Filter cover, 8 ... Filter, 8D ... Band, 9 ... Oil pocket.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Eiji Yoshimura 2-1-1 Katata, Otsu City, Shiga Prefecture Toyobo Co., Ltd. AC Technology Center

Claims (1)

[Claims] 1. A motor, a fan, and
In a filter for a ventilation device that is incorporated with a fan cover and is formed into a fold shape for use, without connecting the frame around the fold-fold filter with a frame, connect the top of the fold line of the filter with a band. A characteristic ventilation filter.