JPS60847A - Dust collecting apparatus - Google Patents

Abstract

PURPOSE:To enable physical dust collection in combination with electrostatic dust collection by providing in the filter part an electrostatic dielectric body and a filter body isolated from the electrostatic dielectric body, and providing a filtration member to the filter body and a wire-shaped electrifiable member planted to the filtration member. CONSTITUTION:An external frame 1 having a suction port 11 and an exhaust port 12 for air, a means 2 for flowing air in the frame 1, and a filter part 4 provided in the frame 1 for filtering the air, are provided to a dust collecting apparatus. An electrostatic dielectric body 41 provided vertically to the direction of the flow of the air in the frame 1, and a filter body 42 provided behind the dielectric body 41 along the direction of the air flow and apart a specified distance from the dielectric body, are provided to the filter part 4. Filtration members 421 arranged vertically to the direction of the air flow collecting contaminant particles contained in the air with many pores, and many wire-shaped electrifiable members 422 planted in the member 421 to direct toward the dielectric body 41, constitute the filter body 42. Then, a static electric field is generated between the dielectric body 41 and the electrifiable member, and contaminant particles are collected by attraction to the electrifiable member.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collector configured to perform electrostatic dust collection in addition to physical dust collection.

Conventionally, this kind of dust collector uses glass wool etc. as a filter to collect contaminant particles and
For example, it is equipped with a physical dust collector that collects dust and cleans the air, and a discharge electrode and, for example, a cylindrical dust collection electrode. An electrostatic precipitator is provided, which is configured to charge the contaminant particles by applying a corona discharge of the discharging electrode and thereby attract and collect the contaminant particles on the dust collecting electrode.

However, the former physical dust collector has the disadvantage that it may not be able to collect ultrafine pollution particles depending on the size and number of micropores in the filter used, while the latter's electrostatic Dust collectors use high-voltage generators to generate corona discharge, which increases manufacturing costs, and handling the high-voltage generators is dangerous, and corona discharges cause corona loss, or power loss. There were drawbacks.

The present invention aims to provide a grief collection device that eliminates the above-mentioned drawbacks.

The apparatus of the present invention will be explained below with reference to the accompanying drawings.

FIG. 1 is a vertical side view of the dust collector of the present invention, in which 1 is an exterior frame, 2 is a fan as an air flow means, 3 is a motor as a drive unit for driving the fan 2, and 4 is a filtration unit. , 5 is an auxiliary filtration section.

The exterior frame 1 is provided with an air suction port 11 and an air discharge port 12, and the fan 2 and the motor 3 are disposed close to the suction port 11, and the air flows from the suction port 11 side to the discharge port 12 side. However, depending on the case, the fan 2 and motor 3 may be disposed on the discharge port 12 side, and the fan 2 may be a trap type fan in the embodiment. You can also use the following methods.

Additionally, the suction port 11 is provided with a filter 11', and if a commonly used mesh filter is used as the filter 11', coarse contaminant particles sucked from the suction port 11 can be filtered out in advance. Therefore, together with the filtration section 4 and the auxiliary filtration section 5, the dust collection performance can be improved.

The filter section 4 includes an electrostatic inductor 41 and an electrostatic inductor 4.
The electrostatic inductor 41 is a metal mesh made by molding a conductor such as copper into a mesh shape as shown in FIG. The above-mentioned exterior frame 1
are arranged perpendicular to the air flow direction.

FIG. 3 is a perspective view showing an embodiment of the filter body 42,
In the figure, 421 is a filtering member, and 422 is a charging member.

The filter member 421 is provided on the exterior frame 1 perpendicularly to the air flow direction and spaced apart from the electrostatic inductor 41 by a predetermined distance of 1, for example, about 25 mm, and further includes a porous foam having dielectric properties. The plate is made of a synthetic resin such as polyurethane foam, and is configured to perform physical dust collection by collecting contaminant particles using minute pores scattered within the polyurethane foam.

The above-mentioned polyurethane foam usually has the disadvantage that the foam membrane remains in the product and does not function well as a filtration medium, but in recent years, the foam membrane has been completely removed and a three-dimensional skeleton structure has been created. An example of such a resin is "Everlight Scotto" (manufactured by Brideston Tire Co., Ltd.).

The charging member 422 has a structure in which a large number of linear fibers molded from a dielectric material 5, for example, polyester, are implanted in the filtering member 421 toward the electrostatic dielectric material 41,
In the embodiment, the charging member 422 is the filter member 421
It is attached with adhesive.

The filter member 421 has an electrode body 42 as shown in FIG.
1', and this electrode body 421' may be made of an electrically conductive and breathable material, such as fibrous activated carbon. In this case, the electrode body 421' also has a filtering action. There are some promising benefits.

Furthermore, as shown in FIG. 4, voltages are applied to the electrostatic inductor 41 and the electrode body 421' so that they have different polarities, so that the electrostatic inductor 41 and the charging member 422 An electrostatic field is generated between them, and contaminant particles, such as dust, are attracted and collected on the charging path material 422 by this electrostatic field.

On the other hand, when the charging member 422 is charged as described above, it is thought that the filtering member 421 is also charged, so the filtering member 421 can perform electrostatic dust collection in addition to the physical dust collection described above. , also in the electrostatic dielectric 41,
There is a possibility that contaminant particles charged with a polarity different from the voltage applied to the electrostatic dielectric 41 are adsorbed and collected.

In the embodiment, the electrostatic inductor 41 and the filtering member 42
1 is connected to a DC power supply, but an AC power supply or a pulse power supply can also be used.

Furthermore, since the electrostatic field generated in the charging member 422 has a property that static electricity appears more on the tip side of the elongated shape, the strength at the tip of the charging member 422 is strong, and as a result, the contaminant particles is attracted to the tip of the charging member 422, but the tip of the charging member 422 can be formed into a sharp shape to further increase the electrostatic field strength.
In this way, good dust collection performance can be achieved using a relatively low voltage power source.

Furthermore, although the filter section 4 is provided at one location in the embodiment, it may be provided at two or more locations when used in a location such as a factory where a high level of dust collection performance is required.

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 the contaminant particles that have passed through the filtration section 4 can be collected by the auxiliary filtration section 5.

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

That is, as shown in FIG. 5, the electrostatic inductor 41 is provided perpendicularly to the air flow direction of the exterior frame 1, and serves as a base that physically collects contaminant particles mixed in the air with micropores. 43, and a large number of linear members 44 made of a dielectric material are installed on this base 43 toward the filter member 42, and the base 43 has a wire member 44 similar to the filter member 421 A dielectric porous synthetic resin board is used, and the base 4 is
3 is attached with an electrode body 43' having electrical conductivity and air permeability.

Therefore, if voltages of different polarities are applied to each of the electrode bodies 43' and 421', an electrostatic field will also be generated in the linear member 44,
Since contaminant particles are thereby adsorbed and collected, there is an advantage that, in combination with the physical dust collection by the base 43, the dust collection performance can be significantly improved.

Incidentally, the strength of the electrostatic field of the linear member 44 can be increased by processing the tip of the linear member 44 into a sharp shape, thereby further improving the dust collection performance.

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

In the dust collector of the present invention, the weight of contaminant particles mixed in the air is physically collected by the filter member 421 of the filter body 42, and is also collected between the electrostatic conductor 41 and the charging member 422. Since it has a double structure in which the electrostatic field generated by the charging member 422 electrostatically attracts and collects the contaminant particles, the contaminant particles passing through the filter section 4 are efficiently collected.
22 is configured in a linear shape, and by applying a low voltage to the electrostatic inductor 41 and the filtering member 421, it is possible to obtain electric current with a large electric field strength. Therefore, the production cost of the dust collector of the present invention is low. There is also very little concern about danger and power loss.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional side view showing the dust collector of the present invention, and FIG. 2 is a perspective view showing one embodiment of an electrostatic dielectric used in the same device.
Fig. 3 is a perspective view of a filter used in the above device, Fig. 4 is a perspective view showing one embodiment of the filtration section of the above device, and Fig. 5 is a perspective view showing another embodiment of the filtration section of the above device. be. In the figure, 1 is an exterior frame, 2 is a fan as an air flow means, and 3
4 is a motor as a drive unit, 4 is a filter unit, 41 is an electrostatic inductor, 42 is a filter, 421 is a filter member, 422 is a charging member, 43 is a base, and 44 is a linear member. Patent applicant Cubic Engineering Co., Ltd. Agent Makoto Matsuda Figure 4 Figure 5 Proverbs

Claims (1)

[Scope of Claims] 1. An exterior frame having an air suction port and an air discharge port, a flow means for flowing air from the suction port to the discharge port, and at least one provided within the exterior frame and for filtering the air. 1
an electrostatic dielectric disposed perpendicularly to the air flow direction of the exterior frame;
A filter body is provided which is arranged at a predetermined distance apart from the electrostatic conductor along the air flow direction, and the filter body is arranged perpendicularly to the air flow direction of the exterior frame. It also consists of a filtration member that collects contaminant particles mixed in the air with a large number of micropores, and a large number of linear charging members installed in this filtration member in the direction toward the electrostatic dielectric. Voltages of different polarities are applied to the electrostatic dielectric and the filtering member, respectively, to generate an electrostatic field between the electrostatic dielectric and the charged member, thereby eliminating contamination caused by the charged member mixed in the air. A dust collector characterized by being configured to adsorb and collect particles. 2. The electrostatic dielectric is provided with a base that is arranged perpendicularly to the air flow direction of the exterior frame and that collects contaminant particles mixed in the air with micropores, and a base that has the above-mentioned filter on this base. Claim 1, characterized in that the linear member is made of a dielectric material and is implanted in large numbers toward the body.
Dust collector as described in section. 3. The tip of the charging member and the linear member is formed into a sharp shape so as to increase the strength of the electrostatic field between the charging member and the linear member. The glum collection device according to item 1 or 2.