JPH03186366A - Dust collector - Google Patents

Abstract

PURPOSE:To prevent the re-scattering of accumulated dust by mounting a charging film to the outer periphery of a cylindrical conductor and arranging an exhaust pipe to the outer periphery of a rotary cylindrical body equipped with a means for applying voltage to the cylindrical conductor so as to provide a fine interval to provide a suction means to the exhaust pipe. CONSTITUTION:A charging film 1 is charged by applying voltage to a rotary conductor 2 and dust charged in polarity reverse to that of the charging film 1 is attracted to the surface of the charging film 1. The rotary cylindrical body constituted of the rotary conductor 2 and the charging film 1 is rotated around a rotary shaft 7. Since negative pressure is applied to an exhaust pipe 5 by an exhaust apparatus such as a vacuum pump, the air in an atmospheric space passes through a fine gap 4 to be discharged from the exhaust pipe 5. Since the cross-sectional area of the flow passage of the fine gap is small, flow velocity becomes high and the dust attracted to the surface of the charging film 1 is released from the surface of the charging film 1 by the flow of air having high flow velocity to be discharged from the exhaust pipe 5 along with air.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dust collector for capturing and removing dust present in an atmospheric space.

Conventional technology FIG. 5 shows the basic principle configuration of a conventional dust collector.

1 is a dielectric film, 2 is a conductor, and 3 is a lead wire for applying voltage to the conductor 2.

By applying a voltage to the conductor 2, charges are generated on the surface of the dielectric 1, and dust in the atmosphere is attracted.

Problems to be Solved by the Invention However, in the conventional configuration described above, the dust adsorbed on the surface of the dielectric 1 may be re-splattered and contaminate the atmospheric space.

Means for Solving the Problems The present invention for solving the problems described above provides an exhaust pipe with a minute gap on the outer periphery of a rotating cylindrical body, which is equipped with a means for applying a voltage to the body by attaching a charged film to the outer periphery of the cylindrical conductor. is installed, and the exhaust pipe is provided with an intake means. In addition, a discharge pipe is provided in the exhaust pipe that rotates in contact with the outer periphery of a rotating cylindrical body, which is equipped with a charged film on the outer periphery of a cylindrical conductor divided into a plurality of parts, and is equipped with means for applying voltage to the divided cylindrical conductors. be.

Operation With the above configuration, when a voltage is applied to the cylindrical conductor, charges are generated on the surface of the charged film, which is a dielectric.
Dust charged to the opposite polarity is attracted to the surface of the charged film.

Therefore, by rotating the rotating cylindrical body around the rotation axis, bringing the suction surface close to the exhaust housing, and applying negative pressure to the exhaust pipe with an exhaust device such as a vacuum pump, the minute gap between the charged film surface and the exhaust housing is Since a gas flow is generated in the gap, the adsorbed dust is separated from the surface of the charged film due to this gas flow with a high flow rate, and is discharged in the direction of negative pressure. In addition, a charge is generated on each charged film on the surface of the divided cylindrical conductor to which a voltage is applied individually, and dust charged with the opposite polarity to that charge is attracted to the surface of the charged film, and the rotating cylinder is rotated around the rotation axis. Then, by sequentially bringing the electrically grounded discharge body into contact with the divided charged films, the dust is de-charged, and by applying negative pressure to the exhaust pipe with an exhaust device such as a vacuum pump, the exhaust housing and A gas flow is generated in the minute gap between the dielectric film and the gas flow at a high flow rate, and the uncharged dust is discharged in the direction of negative pressure.

Example The present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a dust collector according to an embodiment of the present invention, and FIG. 2 is a cross-sectional diagram of a dust collector according to an embodiment of the present invention.

In FIGS. 1 and 2, 1 is a charged film made of a dielectric material,
2 is a rotating conductor, 3 is a power source for applying voltage to the rotating conductor, 4 is a minute gap, 5 is an exhaust pipe, 6 is an exhaust housing,
7 is a rotation axis, 12 is an exhaust device, and X and y are gas flow directions.

By applying a voltage to the rotating conductor 2, the charged film 1 is charged,
Dust that is charged to the opposite polarity to the charged electrode is adsorbed onto the surface of the charged film 1. A rotating cylindrical body composed of a rotating conductor 2 and a charged film 1 rotates around a rotating shaft 7. Since negative pressure is applied to the exhaust pipe 5 by an exhaust device such as a vacuum pump, gas in the atmospheric space passes through the minute gap 4 and is exhausted from the exhaust pipe 5.

At this time, the flow velocity increases because the flow path cross-sectional area of the minute gap 4 is small, and the cliff adsorbed on the surface of the charged film 1 is peeled off from the surface of the charged film 1 due to this high velocity gas flow, and is released from the exhaust pipe 5. It is emitted along with the gas.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram of a dust collector according to a second embodiment of the present invention, and FIG. 4 is a block diagram of an embodiment of a dust collector according to a second embodiment of the present invention. , 8 is an insulating part made of an insulating material, 9 is a space, and 10 is a discharge body having a rotating shaft and electrically grounded.

By applying a voltage to the conductor 2, charges are generated on the surface of the charged film 1 divided by spaces in the circumferential direction, and dust charged to the opposite polarity to the charged electrode is attracted to the surface of the charged film 1. A cylindrical body made up of an insulating section 8, a charged film 1, and a rotating conductor 2 is rotated around a rotating shaft 7. Next, the surface of the charged film 1 divided in the circumferential direction on which the dust has been adsorbed is brought into contact with the electrically grounded discharge body 10 to release the charge on the dust, and the exhaust pipe 5
By applying negative pressure with an exhaust device such as a vacuum pump, a gas flow is generated in the minute gap 4 between the exhaust housing 6 and the charged film 1, and the uncharged dust is discharged in the negative pressure direction. . At this time, since the rotating conductor 2 and the charged film 1 are separated into several lands on the circumference of the rotating cylinder by the space 9, the charged film 1 comes into contact with the discharge body 10 and is electrically grounded.
There is only one land, and the surfaces of the lands of the other charged films 1 remain charged, making it possible to attract dust in the atmospheric space, so that successive attraction and removal is achieved as the rotating cylindrical body rotates. .

Effects of the Invention As described above, according to the present invention, since the charged electrode is rotated and the accumulated dust is removed by the forced intake air current, the accumulated dust is not scattered again and the dust is removed from the charged electrode. This ensures that dust particles are always cleared, resulting in more efficient dust collection.

Further, by providing a function of dividing the charged electrode into a plurality of parts and discharging the charge individually, collected dust can be removed more effectively.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a dust collector according to a first embodiment of the present invention, FIG. 2 is a cross-sectional diagram of a dust collector according to a first embodiment of the present invention, and FIG. A configuration diagram of the dust collector of the example,
FIG. 4 is a sectional view of a dust collector according to a second embodiment of the present invention, and FIG. 5 is a sectional view of a conventional dust collector. 1...Charged film, 2...Rotating conductor, 4...
...Minute gap, 5...Exhaust pipe, 6...
...Exhaust housing, 10...Discharge body, 1
2...Exhaust device.

Claims (2)

[Claims] (1) A charged film is attached to the outer periphery of a cylindrical conductor, and an exhaust pipe is installed on the outer periphery of a rotating cylindrical body with a means for applying voltage to the cylindrical conductor with a slight gap, and an intake means is provided in the exhaust pipe. A dust collector characterized by: (2) A discharge body that rotates in contact with the outer periphery of a rotating cylindrical body, which is equipped with a means for applying a voltage to the divided cylindrical conductors by attaching a charged film to the outer periphery of each divided cylindrical conductor, is provided in the exhaust pipe. The dust collector according to claim 1.