JPS60846A - Dust collecting apparatus - Google Patents

Abstract

PURPOSE:To enable collection of particles by electrostatic effect by providing many fine wire-shaped electrifiable members to protrude confrontingly to the inside of a pair of base stand which are provided confrontingly to a filter part, and providing dielectric bodies so as to contact with each top end of the charged member. CONSTITUTION:An external frame 1 having a suction port 11 and an exhaust port 12 of air, a means 2 for flowing air in the frame 1, and filter part 4 for filtering air at a specified position of the frame 1 are provided. A pair of base stand 41 are provided in the filter 4 in the direction of the flow of air in the frame confronting the passage of the air flow, and many electrically charged member 42 having fine wire-shaped top ends are protruded in the inside of the base stand so as to confront each other. Further, a dielectric body 43 made of a plate or a sheet of cloth is provided so as to contact with the top end of each member 42. Then, static electric field is generated in the member 42 by impressing an electric voltage to the pair of base stand 41 so as to let each base stand 41 have different polarity. By this method, contaminating particles contained in the air are caught effectively by attracting the particles to the member 42.

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 discharge electrode and a dust collection electrode are provided, voltages are applied to the discharge electrode and the dust collection electrode so as to have different polarities respectively, and the pollution particles are charged by corona discharge to the discharge electrode,
As a result, an electrostatic dust collector is provided which adsorbs and collects contaminant particles on the dust collecting electrode.

However, the former physical dust collector has the disadvantage that it is often unable to collect ultrafine pollution particles due to the size and number of micropores in the filter, while the latter electrostatic dust collector has the disadvantage of being unable to collect the corona particles mentioned above. In order to obtain a wide discharge in the discharge space, a high-voltage generator must be used, which increases manufacturing costs, and handling of the high-voltage generator is dangerous, and furthermore, the power loss during the corona discharge is 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 longitudinal sectional side view showing the dust collector of the present invention. 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 air suction ports 11 on both opposing sides, and a discharge port 12 for discharging the air sucked through the suction ports 11 from the exterior frame 1. .

The fan 2 and the motor 3 may be provided on the side of the suction port 11 to allow air to flow into the exterior frame 1, but they may also be provided on the side of the discharge port 12, or the fan 2 may be provided on the side of the discharge port 12, for example. In addition to using an electric fan as in the example,
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. Q. There is an advantage that filtering can be performed before the inflow is allowed to flow in. FIG. 2 is a perspective view showing an embodiment of the above-mentioned filtration sections 4, 4, and in FIG. 1, 41.41 is a base, 42.42 is a charging member, 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 a metal plate or a resin plate. When a foamed synthetic resin board, for example a polyurethane foam, is used, when air passes through the micropores in the polyurethane foam, the micropores physically collect contaminant particles 1, such as dust, mixed in the air. It has the advantage of functioning as a member.

Note that the above polyurethane foam usually has a foam membrane remaining in it, so it cannot be said that it has sufficient performance as a filter material, but in recent years, the foam membrane has been completely removed. Polyurethane foams with only a three-dimensional skeleton structure are available, and an example of this type of foam is the product name "Everlight Scotto" (manufactured by Brideston Tire Co., Ltd.).

The charging members 42, 42 have at least a tip end shaped like a thin gland, and are provided in large numbers inside the base 41, 41 in directions facing each other.

Usually, a dielectric material such as polyester may be formed into a linear shape, which has the advantage that swinging of the tip is reduced.

The dielectric 43 is connected to the charging member 42 as shown in FIG.
It is placed so that it touches the tip of the 42nd person, and
An example of a JJt material is plate-shaped ebonite.

A polyethylene nonwoven fabric processed into a cloth shape may be used.

Furthermore, as shown in FIG.
A conductive plate 41a provided as an electrode on the outside of 1.

41a1, for example, a copper foil and a filler 41b provided as an insulating means on the outside of the conductive plates 41a, 41a.

41b1 is made of, for example, urethane foam, and is configured to generate an electrostatic field between the charging members 42 and 42 by electrostatic induction by applying different voltages to the conductive plates 41a and 41a.

Therefore, the contaminant particles sucked together with the air through the suction port 11 are electrostatically attracted to the charging members 42, 42 and the dielectric 43 and collected.

Note that when the charging member 42.42 is charged and an electrostatic field is generated, it is considered that the base 41.41 is also charged.
If the above-described foamed synthetic resin plate is used as the base 41.41, physical dust collection and electrostatic blood collection can be performed together on the base 41.41.

Furthermore, since the charging members 42, 42 charge a large amount of static electricity at the tips that come into contact with 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 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 filtration section 4 at only one location, or it is also possible to arrange two of the filtration sections 4 side by side on the exterior frame 1 side by side.

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.

The dielectric body 43 may not be disposed between the charging members 42, 42, but the tips of the charging members 42, 42 may be brought into contact with each other as shown in FIG. Compared to the case where the dielectric material 43 is provided, the dust collection performance is inferior, but as a result of experiments, good dust collection data was obtained.

Furthermore, as shown in FIG. 5, the tip of the charging member 42.42 may be immovably supported by a supporter 42a, and in this way, even if the tip of the charging member 42.42 is made extremely thin, this tip portion is not affected by the circulating air. Since the electrostatic field obtained by the charging members 42 and 42 can be prevented from swinging due to the charging members 42, 42, etc., it is possible to stabilize the electrostatic field obtained by the charging members 42, 42.

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

Each of the charging members 42, 42 has at least a tip portion formed into a thin wire shape in order to increase the electrostatic field strength.
The distance between the charging members can be reliably separated by a distance of 2.42 mm, and therefore it is easy to control the distance between the charging members to be extremely small.

Furthermore, since the tips of the charging members 42, 42 are in contact with the dielectric 43, the lengths of the charging members 42, 42 do not have to be uniform, and therefore strict manufacturing control is required. Since this process is not performed, there is the benefit of labor saving in processing.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of the present Pengmei dust collector, Fig. 2 is a perspective view showing the filtration section used in the above device, Fig. 3 is a cutaway front view showing a part of the filtration section, and Fig. 4 . 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, and 3
is a motor as a drive unit, 4 is a filter unit, 41 is a base,
42 is a charging member, 43 is a dielectric, and 5 is an auxiliary filtration part. Patent applicant: Cubic Engineering Co., Ltd. Agent Makoto Matsuda Department Fig. 3 Fig. 4 Fig. 2 Fig. 5

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 provided at a predetermined position of the exterior frame and for filtering the air. a pair of bases disposed oppositely along the air flow direction of the exterior frame;
A plurality of charging members protruding from the inside of these bases in opposite directions, each having at least a tip made of a thin wire, and a plate arranged to come into contact with the tips of each of these charging members. A dielectric material in the form of a shape or a cloth is provided, and voltages are applied to each of the pair of bases so as to have different polarities to generate an electrostatic field in the charging member, whereby the charging member is placed in the air. A dust collector characterized in that it is configured to adsorb and collect contaminant particles mixed in the air. 2. The collection according to claim 1, characterized in that the pair of bases are constituted by a filtering member that physically collects contaminant particles mixed in the air using micropores. dust equipment. 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. The dust collecting device according to claim 1, 2, or 3, wherein the charging member has a sharp tip.