JPS62136255A - Dust collector - Google Patents

Abstract

PURPOSE:To enhance the collection efficiency of fine particles by promoting the ionization thereof, by providing a means for forming an unequal electric field and a magnetic field and a dust collection means for forming an equal electric field and a magnetic field in a case having an air inlet and an air outlet. CONSTITUTION:Air introduced into an air inlet 1a by a blower 2 enter between a charge means 3 and each charge electrode plate 3a. Herein, charged or polarized particles receive the action of a magnetic field with respect to a speed component in a direction at a right angle to the magnetic field to receive ionizing and polarizing actions. Further, the fine particles receive the action of an unequal electric field to be ionized and air containing the ionized the particles subsequently enters between the dust collection electrodes 5a of a dust collection plate 5. Because an equal electric field and a magnetic field are formed between the dust collection electrode plates 5a, the ionized fine particles receive force moving along the electric field and fine particles having polarity corresponding to that of the dust collection electrode plates 5a are collected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dust collector that removes dust, metal particles, metal ions, etc. from the air.

(Prior Art) In fields such as the electronic industry, mechanical industry, and chemical industry, dust collectors are used to remove fine particles such as dust, metal particles, and metal ions from indoor air.

Conventionally, this dust collector uses a filter (usually a particle size of 0
．． Generally, a so-called HEPA filter (IJLm with a particle capture rate of 99.9995%) is used to trap the fine particles in the air on the filter by allowing air to pass through the filter. Furthermore, an electrostatic precipitator is also used in which air is ionized by forming a high-pressure electrostatic field and causing corona discharge, and fine particles in the air that are charged by the ions are attached to a positive electrode plate.

(Problem to be solved by the invention) However, in recent years, due to the development of laser machining, electrical discharge machining, etc., metal particles and metal ions with a particle size of 0.1 gm or less are generated, and it is difficult to reliably capture these fine particles. Although there is a demand for a dust collector that can do this, it is difficult for all of the conventionally used dust collectors to capture fine particles with a particle size of 0.1 Bm or less.

An object of the present invention is to provide a dust collector that can effectively trap even fine particles with a particle size of 0.1 Bm or less.

(Means for Solving the Problems) The present invention is characterized in that a conventional electrostatic precipitator uses only an electric field, but a magnetic field is also used.

According to the present invention, there is provided a dust collector that includes a charging means for forming an unequal electric field and a magnetic field, and a dust collecting means for forming an equal electric field and a magnetic field, in a case having an air inlet and an air outlet.

(Operation) Fine particles present in the air introduced into the case are affected by the unequal electric field and magnetic field formed in the charging means,
Due to the action of the magnetic field, ionization is promoted as the time of application in the magnetic electric field increases. These fully ionized fine particles are captured by the dust collecting means, but since a uniform electric field and a magnetic field are formed in the dust collecting means, the time during which they are covered in the magnetic electric field becomes longer due to the action of the magnetic field. Therefore.

The dust collecting means efficiently captures fine particles that are sufficiently ionized and have a long banding time.

(Examples) Hereinafter, the present invention will be specifically described based on illustrated examples.

1 to 3 show an embodiment of a dust collector according to the present invention, in which FIG. 1 is a schematic sectional view of the structure, FIG. 2 is a perspective view showing charging means and dust collection means, and FIG. In Figure 0, which is a plan view of the charging means and the dust collecting means, l is a case of a dust collecting device, which is equipped with an air port 1a and an air outlet 1b. Reference numeral 2 denotes a blower disposed at the air inlet 13, which introduces indoor air into the case 1. Reference numeral 3 denotes charging means disposed downstream of the blower 2, which includes a plurality of charged electrode plates 3a made of conductive magnetic material and arranged at intervals, as shown in FIGS. 2 and 3.・and the six charged electrode plates 3a,・
. . and a plurality of discharge electrodes 3b respectively arranged between the discharge electrodes 3b. The charging means 3 has its discharge electrode 32. ...
As shown in FIG. 3, a charged electrode plate 3 is connected to the positive side of the power source 4.
1. ... are respectively connected to the negative side, and by applying a high voltage between the two poles, an unequal electric field and magnetic field are generated between the two poles.

Reference numeral 5 denotes a dust collecting means disposed after the charging means 3, and is composed of a plurality of dust collecting electrode plates 5a, . . . made of a conductive magnetic material and arranged at intervals. As shown in FIG. 3, the dust collecting means 5 has dust electrode plates 5a, . By applying this, an equal electric field and magnetic field are generated between the two poles.

The dust collector according to this embodiment is configured in one or more ways, and the electric field and magnetic field generated by the charging means 3 and the dust collecting means 5 are parallel to each other.

Next, the operation of this embodiment will be explained.

Air introduced into the case 1 from the air inlet 1a by the blower 2 enters between the charged electrode plates 3a, . . . of the charging means 3. Since an unequal electric field and a magnetic field are formed between each of the electrode plates as described above, the air containing the introduced fine particles is affected by the magnetic field and the unequal electric field. First, in the action of a magnetic field, charged or polarized particles are acted upon by the magnetic field with respect to a velocity component perpendicular to the magnetic field, and their velocity is reduced relative to the air flow velocity, and they tend to stop in the electromagnetic field.

Particles that are not charged or polarized are also subjected to ionization and polarization effects by the magnetic field. The fine particles polarized and ionized in this manner are attracted by a strong electric field under the action of an unequal electric field, and are further ionized. The air containing ionized fine particles first enters between the dust collecting electrode plates 5a, . . . of the dust collecting means 5. As described above, equal electric and magnetic fields are formed between each dust collecting electrode plate, so the ionized particles present in the introduced air are given a force to move along the electric field, and each Fine particles of polarity corresponding to the dust collection electrode plates 5a, . . . are adsorbed and captured. At this time, since a magnetic field is formed between each of the dust collecting electrode plates 5a, . Since the spreading time in the electromagnetic field becomes longer, the efficiency with which the particles are captured by the dust collecting electrode plates 5a, . . . increases.

FIG. 4 shows another embodiment according to the present invention, and is a perspective view of charging means and dust collection means. In the same figure, 30
is a charging means, which includes a plurality of magnet plates 31 arranged substantially parallel to each other at intervals, and arranged substantially parallel to each other with a predetermined interval between the magnet plates with insulating parts 32 interposed therebetween. a plurality of charged electrode plates 33, . . . , and the six charged electrode plates 33. ...
and each of the magnet plates 31. ... and a plurality of discharge electrode plates 34. It is composed of... It should be noted that each discharge electrode 34 of the charging means 30 is connected to the positive side of the power source in the same way as the discharge electrode 3b in the above embodiment, and the charging electrode plate 33- is connected to the negative side of the power source, and a high voltage is applied between the two electrodes. By applying , an unequal electric field is formed between the two poles. Therefore, each charged electrode plate 33. . . , and each space A formed by each magnet plate 31, .

Reference numeral 50 denotes a dust collecting means, which includes a plurality of magnetic plates 51 . . . . and an insulating member 52 between each magnet plate. A plurality of dust collection electrode plates 53 . It is composed of... Note that the plurality of dust collection electrode plates 53 of the dust collection means 50 are alternately connected to the positive side and the negative side of the power source as in the above embodiment, and by applying a high voltage between the two poles, An equal electric field is formed between the two poles. Therefore, each dust collecting electrode plate 53. In each space B formed by . . . and each magnet plate 51, .

This embodiment is configured as described above, and the charging means 30
Fine particles present in the air introduced into the space A are subjected to the action of a magnetic field and an unequal electric field. That is, when a fine particle crosses a magnetic field at right angles, a voltage is generated and one polarization or ionization energy is imparted to the particle. The Lorentz force acts on this charge, causing the particles to rotate perpendicular to the direction of the air flow, and try to stay in the magnetic field. Since an unequal electric field is formed here, the fine particles are attracted by the strong electric field and given sufficient ionization energy.

It further ionizes. In this way, in the charging means 3,
The presence of a magnetic field increases ionization efficiency, and fine particles present in the air are sufficiently ionized. The air containing fine particles ionized by passing through the charging means 30 then enters the space B of the dust collecting means 50. Since a uniform electric field is formed in the space B, the ionized fine particles present in the introduced air are given a force to move along the electric field, and each dust collection plate has a corresponding polarity. of fine particles are adsorbed and captured. At this time, since a magnetic field is formed in the space B as described above, the particles crossing the magnetic field cause a rotational movement as described above, and the particles spread out in the space B in the magnetic electric field. Since the time will be longer, the dust collecting electrode plate 53. ... will be captured more efficiently.

Although the present invention has been described above based on the illustrated embodiments, the present invention is not limited to only those shown in the embodiments, and various modifications can be made within the scope of the gist of the present invention.
These are not excluded from the scope of the present invention.

(Effects of the Invention) As described above, in the dust collector according to the present invention, since a magnetic field and an electric field are formed in the charging means and the dust collecting means 5, fine particles are dispersed in the magnetoelectric base by the action of the magnetic field. The cloth time becomes longer, the ionization of fine particles can be promoted in the charging means, and the trapping efficiency of sufficiently ionized fine particles can be improved in the dust collecting means. Therefore, magnetic and diamagnetic particles, which were impossible to capture with conventional electrostatic precipitators that only use electric fields, can now be captured by the action of the magnetic field, and particles with a particle size of 0.1
It becomes possible to capture fine particles below JLm. Therefore, metal particles and metal ions generated during laser machining and electrical discharge machining, which were conventionally considered difficult, can also be captured.

[Brief explanation of drawings]

1 to 3 show an embodiment of a dust collector according to the present invention, in which FIG. 1 is a schematic cross-sectional view of the structure, FIG. 2 is a perspective view of a charging means and a dust collecting means, and FIG. 3 is a perspective view of a charging means and a dust collecting means. 4 is a plan view of the charging means and the dust collecting means, and FIG. 4 shows another embodiment of the present invention, and is a perspective view of the charging means and the dust collecting means. ■...Case, 2...Blower, 3.30...Charging means, 3a, 33...Charged electrode plate, 3b, 34...Discharge electrode, 31...Magnet plate, 5,50 ...Dust collection means, 5
a. 53... Dust collection pole plate, 51... Magnet plate.

Claims (5)

[Claims] (1) A dust collecting device comprising a charging means for forming an unequal electric field and a magnetic field, and a dust collecting means for forming an equal electric field and a magnetic field, in a case having an air inlet and an outlet. (2) The charging means is comprised of a plurality of charged electrode plates made of a conductive magnetic material and arranged approximately in parallel, and a discharge electrode arranged between each of the charged electrode plates. A dust collector according to claim (1). (3) The charging means includes a plurality of magnet plates arranged substantially parallel to each other, a plurality of charged electrode plates arranged substantially parallel to each other with disconnected members interposed between the magnet plates, and each charge Claim No. 1 is characterized in that it is constituted by an electrode plate and a discharge electrode disposed in a space formed by each of the magnet plates.
The dust collector described in section 1). (4) The dust collector according to claim (1), wherein the dust collecting means is constituted by a plurality of dust collecting electrode plates made of a conductive magnetic material and arranged approximately in parallel. Device. (5) The dust collecting means is composed of a plurality of magnetic plates arranged substantially in parallel, and a plurality of dust collecting pole plates arranged substantially in parallel with each other with an insulated member interposed between the magnet plates. A dust collector according to claim (1), characterized in that: