JPH0260383B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collector that collects contaminant particles mixed in the air by electrostatic action.

Conventionally, this type of dust collector uses glass wool or the like as a filter to collect contaminant particles, such as dust, in micropores in the filter to purify the air.A physical dust collector uses a discharge electrode and Voltages are applied to the discharge electrode and the dust collection electrode so that they have different polarities, and the discharge electrode is charged with a corona discharge, thereby charging the contaminant particles. An electrostatic precipitator that adsorbs and collects contaminant particles is provided.

However, the former physical dust collector has the disadvantage that it is often unable to collect ultrafine contaminant particles due to the size and number of micropores in the filter, while the latter electrostatic dust collector In order to widely obtain the corona discharge in the discharge space, a high-voltage generator must be used, which increases manufacturing costs, poses a danger in handling the high-voltage generator, and furthermore causes power loss during the corona discharge. The disadvantage was that it was large.

The present invention aims to provide a dust collector that eliminates the above-mentioned drawbacks.

The device of the present invention will be explained below with reference to the accompanying drawings. Fig. 1 is a vertical sectional side view showing the dust collector of the present invention. In the figure, 1 is an exterior frame, 2 is a fan as an air flow means, and 3 is the fan 2. A motor serves as a driving unit, 4, 4 is a filtering unit, and 5 is an auxiliary filtering unit.

In the embodiment, the exterior frame 1 has an air suction port 11 on each opposing side surface, and a discharge port 12 for discharging the air sucked from the suction port 11 from the exterior frame 1.

The fan 2 and the motor 3 are connected to the suction port 1
The fan 2 may be provided on the side of the exhaust port 12 to allow air to flow into the exterior frame 1, but it may also be provided on the exhaust port 12 side, or the fan 2 may be a basket-shaped fan as in the embodiment. In addition, an appropriate configuration can be adopted.

The suction port 11 is provided with a filter 11', and if a commonly used mesh filter, for example, is used as the filter 11', coarse contaminant particles sucked from the suction port 11 will be absorbed into the outer frame 1. It has the advantage that it can be filtered before flowing into the water.

FIG. 2 is a perspective view showing an embodiment of the filtering sections 4, 4, in which reference numerals 41, 41 are bases, 42, 42 are charging members, and 43 is a dielectric.

The bases 41, 41 are disposed in the exterior frame 1 so as to face each other along the air flow direction, and may be made of metal plates or resin plates.
If a dielectric porous synthetic resin board, such as polyurethane foam, is used as the material, when air passes through the micropores in the polyurethane foam, the micropores will remove contaminant particles, such as dust, mixed in the air. It has the advantage of functioning as a filtration member that physically collects it.

The above polyurethane foam usually has a foam membrane remaining in it, so it could not be said that it has sufficient performance as a filter material, but in recent years, the foam membrane has been completely removed. A polyurethane foam having only a three-dimensional skeleton structure is provided, and an example of this type is the product name "Everlight Scotto" (manufactured by Bridgestone Tire Co., Ltd.).

The charging members 42, 42 have at least their tip portions shaped like thin lines, and are provided in large numbers inside the bases 41, 41 in mutually opposing directions, and are usually made of dielectric material, such as polyester. The above-mentioned bases 41, 4 are made into a brush shape by processing into a linear shape.
1, but depending on the case, the dielectric material plate 42' may be divided and branched to form sawtooth-like protrusions as shown in FIG. It has the advantage that it requires less.

As shown in FIG. 3, the dielectric body 43 is disposed so as to come into contact with the tips of the charging members 42, 42, and is made of a highly dielectric material such as plate-shaped ebonite or polyethylene nonwoven fabric processed into a cloth shape. etc. can be used.

Furthermore, as shown in FIG. 2, the filter section 4 includes conductive plates 41a, 41a, such as copper foil, provided as electrodes on the outside of the bases 41, 41, and conductive plates 41a, 41a provided on the outside of the conductive plates 41a, 41a. It has fillers 41b, 41b provided as insulating means, such as urethane foam, and the charging member 4 is charged by applying different voltages to the conductive plates 41a, 41a.
This configuration generates an electrostatic field between 2 and 42 by electrostatic induction. Therefore, the contaminant particles sucked together with the air from the suction port 11 are transferred to the charging member 4.
2, 42 and the dielectric 43, and the dust is collected.

Incidentally, it is thought that when the charging members 42, 42 are charged and an electrostatic field is generated, the bases 41, 41 are also charged, so if the aforementioned porous synthetic resin plates are used as the bases 41, 41, The above base 41, 4
In step 1, physical dust collection and electrostatic dust collection can be performed together.

Further, since the charging members 42, 42 charge more static electricity at the tips that contact the dielectric 43, the tips of the charging members 42, 42 are processed into a sharp shape, thereby further promoting static electricity charging. You can also do that.

Furthermore, in the embodiment, the above-mentioned filtration section 4 is provided at two locations, but when used in a factory or the like where high dust collection performance is required, it may be provided at three or more locations. In some cases, it is sufficient to provide the filter section 4 at only one location, or the filter section 4 may be provided at only one location.
It is also possible to place two of them side by side, one on top of the other.

In the embodiment, the auxiliary filtration section 5 is constituted by a metal mesh filter made by molding a conductive metal material, such as copper, into a mesh shape. By applying this, there is an advantage that contaminant particles that are not collected in the filtration part 4 can be collected in the auxiliary filtration part 5.

In the above, the present invention device can also be configured as follows.

As shown in FIG. 4, each of the charging members 4 is
2 and 42 may be configured so that they are in contact with each other. In this case, the dust collection performance deteriorates compared to the case where the dielectric body 43 is provided, but as a result of experiments, good dust collection data was obtained. I got it.

Further, as shown in FIG. 5, the charging members 42, 42
The tips of the charging members 42, 42 may be immovably supported by the supporter 42a.In this way, even if the tips of the charging members 42, 42 are made extremely thin, the tip portions can be prevented from swinging due to circulating air, etc. member 42,
42 can be stabilized.

Since the device of the present invention has the above configuration, the following effects can be expected.

The charging members 42, 42 have at least their tip portions formed into a thin wire shape in order to increase the strength of the electrostatic field, and the dielectric material 43 is formed so that the tips of the charging members 42, 42 are in contact with each other. Because of the arrangement, the distance between the charging members 42, 42 can be reliably separated by the dielectric material, and therefore it is easy to regulate the distance between the charging members to be extremely small.

Furthermore, the charging members 42, 42 are attached to the dielectric 43.
Since the tips of the charging members 42, 4 are in contact with each other, the charging members 42, 4
2 does not have to be uniform in length and therefore does not require strict manufacturing control, which has the advantage of saving labor in processing.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view of the dust collector of the present invention, Fig. 2 is a perspective view showing a filtration section used in the same device, and Fig. 3 is a perspective view showing a filter section used in the same device.
The figure is a cutaway front view showing a part of the filtration part, the fourth part.
FIG. 5 is a partially cutaway front view showing another embodiment of the same filtering section. In the figure, 1 is an exterior frame, 2 is a fan as an air flow means, 3 is a motor as a driving part, 4 is a filtration part, 41 is a base, 42 is a charging member, 43 is a dielectric, and 5 is an auxiliary filtration part. Show each.

Claims (1)

[Claims] 1. An exterior frame having an air suction port and an air discharge port;
An air flow means for causing air to flow within the exterior frame; and at least one filtration section provided at a predetermined position of the exterior frame and filtering the air; a pair of bases disposed opposite to each other along the line, a large number of charging members protruding in opposite directions from inside these bases, and having at least a tip end shaped like a thin line; A plate-like or cloth-like dielectric material is provided so as to be in contact with each tip of the charging member, and a voltage is applied to each of the pair of bases so as to have a different polarity, thereby charging the charging member. A dust collector characterized in that the charging member generates an electrostatic field to attract and collect contaminant particles mixed in the air. 2. The device according to claim 1, wherein the pair of bases are constituted by a filtering member that physically collects contaminant particles mixed in the air using micropores. Dust collector. 3. The dust collecting device according to claim 1, wherein the charging member is formed by sawtooth-shaped protrusions made by dividing and branching a single plate. 4. The dust collecting device according to claim 1, wherein each of the charging members is made in the shape of a needle and is implanted in the base so as to form a brush body as a whole. 5. Claim 1 or 2, characterized in that the charging member has a sharp tip.
The dust collector described in item 3 or item 3.