KR102512144B1 - Electrostatic precipitator - Google Patents

Abstract

The present invention relates to an electric precipitator, and the electric precipitator according to the present invention collects charged particles by the force of an electric field due to a potential difference applied between a first plate and a second plate that are spaced apart from each other in the electric precipitator. , At least one of the first plate and the second plate for collecting dust is a plate-shaped conductive plate electrode layer, a first dielectric layer formed of a dielectric material in the form of a film on both sides of the plate electrode layer, A pattern electrode layer formed on the first dielectric layer and having a conductive first electrode pattern and a second electrode pattern alternately spaced apart from each other, and a second dielectric layer formed in the form of a film on both sides of the pattern electrode layer as a dielectric material, , DC voltage generator for collecting dust by applying a DC voltage to form a potential difference between the first plate and the second plate; Applying an AC voltage to generate a phase difference between the first electrode pattern and the second electrode pattern. an alternating current voltage generating unit that separates and cleans the collected dust by applying it to the dust collecting plate; and a control unit selectively operating the DC voltage generator and the AC voltage generator according to a dust collection mode or a cleaning mode.

Description

Electrostatic precipitator {ELECTROSTATIC PRECIPITATOR}

The present invention relates to an electric dust collector, and more particularly, to an electric dust collector capable of automatically cleaning dust collected on a dust collection plate.

The electrostatic precipitator charges particles in the air such as dust into ions, passes them between two charged plates, collects them on a dust collection plate of opposite polarity to the charged ions with the force of an electric field formed by the potential difference caused by the charge, and collects the dust in the air. purify

At this time, since the dust collection efficiency due to charging may decrease when the dust collected on the dust collection plate is removed, the dust collection performance can be maintained high by removing the dust collected on the dust collection plate.

Conventional methods for removing the dust collected on the dust collection plate include a brush method, a vacuum suction method, and a method using a cleaning solution.

The brush method is a method of physically contacting a cleaning brush with the collected dust to separate the collected dust. The brush method has a disadvantage in that it requires a physical configuration that automatically rotates and moves the brush, so it is subject to spatial limitations and difficult to perform detailed cleaning.

In addition, the vacuum suction method is a method of separating dust collected by vacuum suction, such as a vacuum cleaner, and has disadvantages in that it is mainly used for filters with low filtration performance, has a complicated structure, and has many defect factors, making it difficult to operate.

In addition, since the method using a cleaning solution uses a liquid such as water, there is a risk of freezing in winter, and microorganisms can easily proliferate, which can be a factor in spreading harmful substances in the air and can cause insulation breakdown of the electric precipitator. .

Republic of Korea Patent Publication No. 10-2004-0081690

Accordingly, an object of the present invention is to solve such a conventional problem, to form a pattern electrode layer on a dust collecting plate, and to apply an AC voltage having a phase difference between adjacent patterns to collect dust with the power of a standing wave. An object of the present invention is to provide an electrostatic precipitator capable of being separated from the plate and cleaned.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The above object is, according to the present invention, in an electric precipitator for collecting charged particles by the force of an electric field due to a potential difference applied between a first plate and a second plate spaced apart from each other, the first plate and the second plate Among the plates, at least one of the dust collecting plates includes a pattern electrode layer in which a conductive first electrode pattern and a second electrode pattern are alternately spaced apart from each other; and a dielectric layer formed of a dielectric material in the form of a film on both sides of the pattern electrode layer, and applying a DC voltage to form a potential difference between the first plate and the second plate to collect dust; an AC voltage generator for cleaning the collected dust by separating it from the dust collection plate by applying an AC voltage to generate a phase difference between the first electrode pattern and the second electrode pattern; and a controller configured to selectively operate the DC voltage generator and the AC voltage generator according to a dust collecting mode or a cleaning mode.

In addition, the above object is, according to the present invention, in an electric dust collector for collecting charged particles by the force of an electric field due to a potential difference applied between a first plate and a second plate that are spaced apart from each other, the first plate and the second plate Among the second plates, at least one of the dust collecting plates includes a conductive plate electrode layer in a plate shape, a first dielectric layer formed of a dielectric material in the form of a film on both sides of the plate electrode layer, and formed on the first dielectric layer on both sides, A patterned electrode layer in which conductive first electrode patterns and second electrode patterns are alternately spaced apart and a second dielectric layer formed of a dielectric material in the form of a film on both sides of the patterned electrode layer, wherein the first plate and the a DC voltage generator for collecting dust by applying a DC voltage to form a potential difference between the second plates; an AC voltage generator for cleaning the collected dust by separating it from the dust collection plate by applying an AC voltage to generate a phase difference between the first electrode pattern and the second electrode pattern; and a controller configured to selectively operate the DC voltage generator and the AC voltage generator according to a dust collecting mode or a cleaning mode.

Here, the patterned electrode layer may be formed of any one of a conductive carbon material, a metal thin film, indium tin oxide (ITO), and nanowires.

Here, the dielectric layer may be formed of any one of PS (Polystylene), PP (Polypropylene), PE (Polyethylene), PET (Polyethylene terephthalate), and PEN (Polyethylene Naphthalate).

Here, the first electrode pattern and the second electrode pattern are each formed in a form in which linear electrodes are spaced apart, and the linear electrodes of the first electrode pattern and the linear electrodes of the second electrode pattern may be alternately spaced apart. there is.

Here, the pattern electrode layer may include a first pattern connection part connecting one end of the linear electrodes of the first electrode pattern and a second pattern connection part connecting the other ends of the linear electrodes of the second electrode pattern.

Here, the first electrode pattern and the second electrode pattern may be electrically connected through the first pattern connection part and the second pattern connection part.

Here, the plate electrode layer may be grounded or DC voltage may be applied to form a potential difference for dust collection.

Here, the first plate and the second plate may be disposed vertically or inclined to the ground.

According to the electric precipitator of the present invention as described above, there is an advantage in that the performance of the electric precipitator can be maintained at a high level because the dust collected on the dust collecting plate can be automatically cleaned.

In addition, since a separate appliance for cleaning can be minimized, there is an advantage in that the configuration of the electrostatic precipitator is simple. Therefore, the electrostatic precipitator can be manufactured compactly.

In addition, there are advantages in that the plate electrode layer for dust collection and the pattern electrode layer for cleaning can be made as separate layers to increase the dust collection area, and the pattern electrode layer can be formed on both sides of the plate electrode layer to increase the cleaning efficiency.

1 is a perspective view schematically illustrating an electric precipitator according to an embodiment of the present invention.
FIG. 2 is a front view illustrating an example of the dust collecting plate of FIG. 1 .
FIG. 3 is a diagram showing the layer structure of the dust collection plate of FIG. 2;
FIG. 4 is a diagram illustrating an electrical connection structure for a dust collection mode in FIG. 1 .
FIG. 5 is a diagram illustrating an electrical connection structure for a cleaning mode in FIG. 1 .
6 is a view showing a state in which a standing wave is formed by an AC voltage applied in a cleaning mode so that collected dust separates from a dust collection plate.
Fig. 7 is a diagram showing another type of layer structure of the dust collecting plate.
8 is a perspective view schematically illustrating an electric precipitator according to another embodiment of the present invention.
9 is a view for explaining the contents of an experiment on cleaning efficiency using an electric precipitator according to the present invention.

The specific details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, the present invention will be described with reference to drawings for explaining an electric precipitator according to embodiments of the present invention.

1 is a perspective view schematically illustrating an electric precipitator according to an embodiment of the present invention, FIG. 2 is a front view illustrating an example of the dust collecting plate of FIG. 1, and FIG. 3 is a layer structure of the dust collecting plate of FIG. 2 It is a drawing showing

An electric precipitator according to an embodiment of the present invention includes a first plate 110, a second plate 120, a DC voltage generator (DC), an AC voltage generator (AC), and a controller (not shown). can be configured.

As shown in FIG. 1, the first plate 110 and the second plate 120 are plate-shaped plates and are spaced apart from each other by a predetermined distance. When charged particles are introduced through the separation space, the charged particles may move and be collected by the force of an electric field formed between the first plate 110 and the second plate 120 .

For example, when a positive (+) high voltage is applied to the first plate 110 and the second plate 120 is grounded or charged by applying a voltage of opposite polarity, the first plate 110 and the second plate With the force of the electric field between (120), positive (+) ion-charged particles move toward the second plate 120 and can be collected on the second plate 120, and negative (-) ion-charged particles Dust may be collected on the first plate 110 by moving toward the first plate 110 .

Although not shown, a charging unit for charging particles in the air may be formed in the front portion before the charged particles are introduced between the two plates 110 and 120 . The charging unit generates ions and disperses them in the air, and the dispersed ions can charge particles in the air. Since the configuration of the charging unit in the present invention may be the same as that known in the art, a detailed description of the configuration of the charging unit will be omitted.

At this time, as shown in the drawing, the first plate 110 and the second plate 120 may be alternately spaced apart from each other to expand the dust collecting area.

Only one of the first plate 110 and the second plate 120 may be a dust collection plate for collecting dust, and both the first plate 110 and the second plate 120 collect dust. can be a plate. For example, if both positive (+) charged particles and negative (-) charged particles are introduced between the first plate 110 and the second plate 120, the positive (+) charged particles and negative (+) charged particles Particles charged with (-) may move in different directions and be collected on the first plate 110 and the second plate 120 .

The first plate 110 and the second plate 120 according to the present invention may be formed of a patterned electrode layer 111 and a dielectric layer 118 . As shown in FIG. 3 , a dielectric layer 118 may be disposed in the form of a thin film on both sides of the patterned electrode layer 111 . For example, the first plate may be formed by coating the patterned electrode layer 111 on the dielectric layer 118 on one side and coating the dielectric layer 118 on the patterned electrode layer 111 again.

The pattern electrode layer 111 may be formed of a conductive carbon material, a metal thin film, indium tin oxide (ITO), a nano wire, or the like as a conductive material, but is not necessarily limited thereto.

In addition, the dielectric layer 118 may be formed of PS (Polystylene), PP (Polypropylene), PE (Polyethylene), PET (Polyethyleneterephthalate), PEN (Polyethylene Naphthalate), etc. as a dielectric material, but is not necessarily limited thereto.

The plate manufactured as described above can be used as a thin film type electrode, and has the advantage of being light and flexible compared to conventional metal plates.

The patterned electrode layer 111 may be formed in a form in which the first electrode patterns 112 and the second electrode patterns 114 are alternately spaced apart from each other. More specifically, as shown in FIG. 2 , the first electrode pattern 112 is formed in a form in which linear electrodes are spaced apart, and the second electrode pattern 114 is also formed in a form in which linear electrodes are spaced apart. At this time, the linear electrodes of the first electrode pattern 112 and the linear electrodes of the second electrode pattern 114 may be alternately spaced apart from each other.

In addition, the first pattern connection part 113 connecting one end of the linear electrodes of the first electrode pattern 112 and the second pattern connection part 115 connecting the other ends of the linear electrodes of the second electrode pattern 114 are formed. can Therefore, the first electrode pattern 112 and the second electrode pattern 114 are electrically connected through the first pattern connection part 113 and the second pattern connection part 115, and the direct current voltage generator (DC) or AC voltage A voltage may be applied from the generator AC or may be grounded.

The present invention can operate in a dust collection mode for dust collection and a cleaning mode for separating and removing collected dust from a plate according to the operation of the control unit. Let's explain.

4 is a diagram showing an electrical connection structure for a dust collecting mode in FIG. 1, FIG. 5 is a diagram showing an electrical connection structure for a cleaning mode in FIG. 1, and FIG. 6 is a diagram showing an AC voltage applied in the cleaning mode. It is a diagram explaining the state in which the standing wave is formed and the collected dust separates from the dust collecting plate.

First, referring to FIG. 4, referring to the electrical connection structure for the dust collecting mode, the pattern electrode layer 111 of the first plate 110 is grounded, and the pattern electrode layer 111 of the second plate 120 is connected to a DC voltage. It may be connected to the generator (DC). In this embodiment, a positive high voltage is applied as an example, but a negative high voltage may be applied.

At this time, when particles in the air are charged by generating positive (+) ions in the charging unit, the charged particles move toward the first plate 110 according to the direction of the electric field between the first plate 110 and the second plate 120. It may move towards and be collected on the first plate 110 . Although the dielectric layer 118 is a non-metallic material, since it has a dielectric property, it is possible to form a strong electric field. Accordingly, the charged particles can be collected on the first plate 110 with high efficiency.

At this time, both the first electrode pattern 112 and the second electrode pattern 114 of the first plate 110 are grounded, and the first electrode pattern 112 and the second electrode pattern 114 of the second plate 120 ) are all connected to the direct current voltage generating unit (DC) so that a high voltage is applied so that the area of the electrode to which the voltage is applied is widened to widen the dust collecting area.

Next, referring to FIG. 5, the electrical connection structure for the cleaning mode will be described. The first electrode pattern 112 and the second electrode pattern 114 are electrically connected to the alternating current voltage generator AC, respectively, to generate an alternating voltage. can be accredited. At this time, as shown in (b) of FIG. 5, an AC voltage is applied to the first electrode pattern 112 and the second electrode pattern 114 so that a phase difference occurs. Therefore, an electric field directed in one direction may be generated between the linear electrode constituting the first electrode pattern 112 and the linear electrode constituting the adjacent second electrode pattern 114 due to the phase difference.

Therefore, as shown in FIG. 6, when an alternating voltage is applied to have a phase difference between the first electrode pattern 112 and the second electrode pattern 114, it is charged with a specific polarity by the force of the standing wave and collected on the plate. Particles fall off the collection plate and become dislodged. Therefore, when the first plate 110 and the second plate 120 are disposed vertically or inclined on the ground, the separated particles fall downward with the force of gravity. In the process of falling down, it may be collected on the dust collection plate again, and the particles collected on the dust collection plate again may fall down while repeating separation again.

Although not shown, when the electrode patterns are sequentially spaced apart from each other in three electrode patterns and an alternating voltage is applied with a different phase difference to the three electrode patterns, not only the force by the standing wave but also the force by the traveling wave acts together. Thus, cleaning may be performed while sequentially moving the dust collected on the dust collection plate to the side.

In this embodiment, the first electrode pattern 112 and the second electrode pattern 114 are formed on both the first plate 110 and the second plate 120, but the polarity of ions generated in the charging unit and the first The polarity applied to the plate 110 and the second plate 120 may be configured to collect dust only on one plate. In this case, the patterned electrode layer 111 does not necessarily need to be formed because the remaining plates other than the dust collection plate do not require cleaning.

For example, if dust is collected only on the first plate 110, the second plate 120 only needs to be applied as DC voltage or grounded for operation in the dust collecting mode to form an electric field due to a potential difference with the first plate 110. Because. Therefore, as shown in FIG. 8, since the first plate 110, which is a dust collecting plate, needs cleaning, a pattern electrode layer 111 composed of a first electrode pattern 112 and a second electrode pattern 114 is formed. , The second plate 120, which does not require cleaning, may be formed of a plate-shaped electrode layer without forming a patterned electrode layer. At this time, AC voltage is applied through the AC voltage generator AC so that the first electrode pattern 112 and the second electrode pattern 114 have a phase difference only to the first plate 110 for the cleaning mode.

Meanwhile, in FIGS. 4 and 5, for convenience of explanation, an electrical connection structure for a dust collection mode and an electrical connection structure for a cleaning mode are shown, respectively. A switch or the like may be formed between wires to prevent operation in another mode when operating as .

Fig. 7 is a diagram showing another type of layer structure of the dust collecting plate. The dust collecting plate of FIG. 3 is composed of the patterned electrode layer 111 and the dielectric layer 118, but in this embodiment the dust collecting plate includes the plate electrode layer 215, the first dielectric layer 216, the patterned electrode layer 211, and the second dielectric layer. (218).

The plate electrode layer 215 is conductive and has a plate shape.

A first dielectric layer 216 in the form of a film made of a dielectric material may be formed on both sides of the plate electrode layer 215 .

A patterned electrode layer 211 is formed on the first dielectric layer 216 on both sides. The patterned electrode layer 211 may be formed in the same pattern as described with reference to FIGS. 2 and 3 . At this time, the plate electrode layer 215 and the pattern electrode layer 211 may be electrically separated by the first dielectric layer 216 .

A second dielectric layer 218 in the form of a film made of a dielectric material may be formed on the patterned electrode layers 211 on both sides.

As described above, the dielectric material used for the first dielectric layer 216 and the second dielectric layer 218 is PS (Polystylene), PP (Polypropylene), PE (Polyethylene), PET (Polyethylene terephthalate), PEN (Polyethylene Naphthalate), etc. can be formed as

At this time, in this embodiment, electrical connection or ground connection with the direct current voltage generator (DC) for the dust collection mode is made through the plate electrode layer 215. In addition, electrical connection with the alternating current voltage generator (AC) for the cleaning mode is made through the first electrode pattern and the second electrode pattern of the pattern electrode layer 211 as in the above-described embodiment.

Therefore, in the dust collection mode, DC high voltage is applied through the plate electrode layers 215 of the adjacent first plate 110 and the second plate 120 and grounded to collect charged particles. Compared to the above-described embodiment, since the cross-sectional area of the plate electrode layer 215 in the form of a plate is larger than that of the patterned electrode layer 111, the dust collection efficiency can be further increased by widening the dust collection area.

In addition, since the patterned electrode layers 211 are formed on both sides, cleaning efficiency can also be increased.

9 shows the result of testing the cleaning efficiency while adjusting the line width of the linear pattern of the patterned electrode layer 111 and the gap between the linear patterns.

As shown in (a) of FIG. 9, the cleaning efficiency was tested by varying the shape of the patterned electrode layer 111 in six cases.

Case 1 Case 2 Case 3 Case 4 Case 5 Case 6 Electrode line width (w, mm) One 1.5 2 0.5 One 2 Electrode spacing (g, mm) 1.5 1.5 1.5 1.5 2 2 w/g 0.667 1.000 1.333 0.333 0.500 1.000

The applied voltage is 1 kV/mm, the waveform is a square wave, the phase difference is 180 degrees, the frequency is 1 Hz, the plate is inclined at 30 degrees, and the particles used in the experiment are general construction site sand.

As shown in the graph of FIG. 9(b), when the patterned electrode layer 111 is formed and an AC voltage is applied as in the present invention, the cleaning efficiency is about 90%, confirming that the cleaning efficiency is high.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. Anyone with ordinary knowledge in the art to which the invention pertains without departing from the subject matter of the invention claimed in the claims is considered to be within the scope of the claims of the present invention to various extents that can be modified.

110: first plate
111: pattern electrode layer
112: first electrode pattern
113: first pattern connection part
114: second electrode pattern
115: second pattern connection part
118: dielectric layer
120: second plate
211: pattern electrode layer
215: plate electrode layer
216 first dielectric layer
218 second dielectric layer

Claims (9)

An electric precipitator for collecting charged particles with the force of an electric field due to a potential difference applied between a first plate and a second plate that are spaced apart from each other,
At least one of the first plate and the second plate, on which charged particles are collected, includes a patterned electrode layer and a dielectric material in which conductive first electrode patterns and second electrode patterns are alternately spaced apart. Including a dielectric layer formed in the form of a film on both sides of the patterned electrode layer,
a DC voltage generator for collecting charged particles by applying a DC voltage to form a potential difference between the first plate and the second plate;
an AC voltage generating unit configured to separate and clean the collected particles from the dust collection plate by applying an AC voltage to generate a phase difference between the first electrode pattern and the second electrode pattern; and
An electric precipitator comprising a control unit for selectively operating the DC voltage generator and the AC voltage generator according to a dust collection mode or a cleaning mode. An electric precipitator for collecting charged particles with the force of an electric field due to a potential difference applied between a first plate and a second plate that are spaced apart from each other,
At least one of the first plate and the second plate, on which charged particles are collected, includes a conductive plate electrode layer in a plate shape, a first dielectric layer formed in the form of a film on both sides of the plate electrode layer as a dielectric material, and A patterned electrode layer formed on the first dielectric layer and in which conductive first electrode patterns and second electrode patterns are alternately spaced apart, and a second dielectric layer formed of a dielectric material in the form of a film on both sides of the patterned electrode layer. do,
a DC voltage generator for collecting charged particles by applying a DC voltage to form a potential difference between the first plate and the second plate;
an AC voltage generating unit configured to separate and clean the collected particles from the dust collection plate by applying an AC voltage to generate a phase difference between the first electrode pattern and the second electrode pattern; and
An electric precipitator comprising a control unit for selectively operating the DC voltage generator and the AC voltage generator according to a dust collection mode or a cleaning mode. According to claim 1 or 2,
The pattern electrode layer is formed of any one of a conductive carbon material, a metal thin film, ITO (Indium Tin Oxide), and a nano wire. According to claim 1 or 2,
The dielectric layer is an electric precipitator formed of any one of PS (Polystylene), PP (Polypropylene), PE (Polyethylene), PET (Polyethyleneterephthalate), and PEN (Polyethylene Naphthalate). According to claim 1 or 2,
The first electrode pattern and the second electrode pattern are each formed in a form in which linear electrodes are spaced apart, and the linear electrodes of the first electrode pattern and the linear electrodes of the second electrode pattern are alternately spaced apart. . According to claim 5,
The patterned electrode layer is
A first pattern connecting portion connecting one end of the linear electrodes of the first electrode pattern, and
An electric precipitator comprising a second pattern connection portion connecting the other ends of the linear electrodes of the second electrode pattern. According to claim 6,
The first electrode pattern and the second electrode pattern are electrically connected to each other through the first pattern connection part and the second pattern connection part. According to claim 2,
The plate electrode layer is grounded or a direct current voltage is applied to form a potential difference for collecting charged particles. According to claim 1 or 2,
The first plate and the second plate are disposed vertically or inclined on the ground.

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