KR20190134362A - Electric dust collector - Google Patents

Abstract

The present invention relates to a dust collection filter which comprises: a dielectric filter material having a first surface through which air enters and a second surface through which incoming air is discharged, and filtering foreign materials contained in the air; an ion generation device including a discharge electrode arranged upstream of the first surface and a high-voltage generator applying high-voltage to the discharge electrode, and inducing polarization of the dielectric filter material by discharging an ion in a direction of the first surface; and a grounding electrode of a conductive material arranged downstream of the second surface. Therefore, dust collection performance is maintained by having an electrostatic force which is always constant.

Description

Dust collection filter {Electric dust collector}

The present invention relates to a dust collecting filter, and more particularly to a dust collecting filter for inducing polarization of a dielectric filter using an ion generator.

Generally, a dust collecting filter is a device that is installed in an air conditioner such as an air cleaner, a cooler, or a heater to collect foreign substances such as dust contained in the air.

Conventional dust collecting filters have been applied by using an electrostatically treated dielectric filter medium, or by placing a dielectric filter medium between metal mesh electrodes such as a mesh screen and applying a predetermined voltage between the electrodes. .

However, in the dust collecting filter using the electrostatically treated dielectric filter medium, as the dust is collected in actual use, the electrostatic force is lost, resulting in a sudden deterioration of performance. The dust collecting filter which places the dielectric filter medium between the electrodes can improve the performance deterioration phenomenon, but it is the power consumption of the blower to make a predetermined air flow due to the increase in pressure loss due to the electrode contacting the entire surface of the rear of the dielectric filter medium. There is a problem that is increased.

In addition, the electrodes before and after the dielectric filter medium require an insulating coating to solve the problem of contact between the electrodes, which leads to a complicated manufacturing process and an increase in manufacturing cost.

In addition, since the thickness of the entire area of the dielectric filter medium may not be evenly formed, there is a problem in that the electric field is unevenly formed and the dust collection deviation is large.

KR10-2011-0128465

The problem to be solved by the present invention is to provide a dust collecting filter that can maintain a predetermined dust collecting performance.

Another object of the present invention is to provide a dust collecting filter capable of polarizing a dielectric filter medium in a simple manner.

Another object of the present invention is to provide a dust collecting filter which can reduce the pressure difference generated between the front and rear of the dust collecting filter to reduce the power supplied to the blower.

Still another object of the present invention is to provide a dust collecting filter capable of stably maintaining a polarization state over the entire surface of the dielectric filter medium.

Yet another object of the present invention is to provide a dust collecting filter in which the manufacturing process can be simplified.

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

In order to achieve the above object, the dust collecting filter according to the present invention has a first surface through which air enters and a second surface through which incoming air is discharged, and a dielectric filter material collecting foreign substances contained in the air; An ion generator including a discharge electrode disposed upstream of the first surface to emit ions toward the first surface and a high voltage generator configured to apply a high voltage to the discharge electrode; And a ground electrode made of a conductive material disposed downstream of the second surface. It includes.

The dielectric filter medium may be formed in a flat plate shape.

The dielectric filter medium may be bent to form a plurality of valleys on the first and second surfaces. The discharge electrodes may be provided in plural and disposed at positions corresponding to the plurality of valleys provided on the first surface.

The ground electrode may be disposed in a flat plate shape parallel to the air flow direction at a position corresponding to the plurality of valleys provided on the second surface.

The ground electrode may be disposed to be spaced apart from the second surface.

The ground electrode may be a porous electrode having a nonwoven structure including conductive fibers.

The ground electrode may be a porous electrode patterned with conductive fibers.

The high voltage generator may apply a pulse negative voltage to the discharge electrode.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the dust collecting filter of the present invention, there are one or more of the following effects.

First, an ion generating device for generating ions upstream of the dielectric filter medium is disposed, and a ground electrode is disposed downstream so that ions generated by the ion generating device are accumulated on the first surface of the dielectric filter medium into which air is introduced. There is an advantage that a predetermined electrostatic force is generated in the dust collection performance can be continued.

Second, since ions are accumulated in the dielectric filter medium, the dielectric filter medium can be easily polarized.

Third, since the discharge electrode and the pore ground electrode are disposed on the upstream side of the dielectric filter medium, the difference in pressure generated between the front and rear of the dust collecting filter is reduced, thereby reducing the power supplied to the blower.

Fourth, the dielectric filter medium is disposed on the entire surface of the dielectric filter medium because a plurality of discharge electrodes of the ion generator are arranged at predetermined intervals, and ground electrodes for inducing ions generated by the ion generator are arranged in a nonwoven fabric structure. Another advantage is that the polarization state remains uniform and stable over the entire surface.

Fifth, since the ion generating device is disposed upstream of the dielectric filter medium, the ground electrode is disposed downstream, and the dielectric filter medium is supported by the ground electrode, the manufacturing process of the dust collecting filter is simplified.

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

1 is a cross-sectional view showing a dust collecting filter according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a cross section of the dielectric filter medium and the ground electrode of FIG. 1. FIG.
3 is an example of a ground electrode including a conductive fiber according to the present invention.
4 is an image (SEM image) using a scanning electron microscope of the nonwoven fabric structure of the ground electrode including a conductive fiber according to the present invention.
5 is a front view of the conductive fiber of the ground electrode according to the present invention and a ground electrode patterned thereto.
6 is a cross-sectional view showing a dust collecting filter according to a second embodiment of the present invention.
7 is a cross-sectional view showing a dust collecting filter according to a second embodiment of the present invention.
8 is a sectional view showing a dust collecting filter according to a third embodiment of the present invention.
9 is a sectional view showing a dust collecting filter according to a fourth embodiment of the present invention.
10 is a cross-sectional view showing an air conditioner having a dust collecting filter according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining the dust collecting filter according to embodiments of the present invention.

1 is a cross-sectional view showing a dust collecting filter according to a first embodiment of the present invention.

The dust collecting filter 10 according to the first embodiment of the present invention includes a dielectric filter material 30 for collecting foreign substances such as dust contained in air, an ion generator 20 for generating ions, and the dielectric filter material ( The ground electrode 40 is disposed to face the ion generator 20 with the 30 interposed therebetween.

On the other hand, the air filtered by the dust collecting filter 10 passes through the dust collecting filter 10 by a predetermined blower described later. The dielectric filter medium 30 having the dielectric filter medium 30 or the ground electrode 40 attached thereto may be attached to a filter case (not shown).

The dielectric filter medium 30 may be made of a fiber 33 of dielectric material, and has a first side 31 through which air enters and a second side 32 through which air is discharged. The dielectric filter medium 30 may be formed in a flat plate shape. The dielectric filter medium 30 may be an electrostatically treated dielectric filter medium.

The ion generator 20 includes a discharge electrode 21 disposed at an upstream side of the dielectric filter medium 30 and spaced apart from the first surface 31, and a high voltage generator 22 for applying a high voltage to the discharge electrode 21. In addition, when a high voltage is applied to the discharge electrode 21, the molecules of the air contained in the air moving toward the first surface 31 of the dielectric filter medium 30 is charged to generate ions.

The high voltage generator 22 may apply a pulse negative voltage to the discharge electrode 21. When the pulse negative voltage is applied to the discharge electrode 21, since the discharge start voltage is low, the spark discharge start voltage is high, and the stability is higher than the discharge applying the positive voltage, more corona current can flow. Greater field strengths can be obtained.

The discharge electrode 21 may be disposed to face the first surface 31 and may emit ions in the direction of the first surface 31. Anions among the ions may move in the direction of the first surface 31 by the negative voltage applied to the discharge electrode 21. The anion may induce polarization of the dielectric filter medium 30. The discharge electrode 21 may be provided in plurality.

The discharge electrode 21 may be made of a conductive material. The conductive material of the discharge electrode 21 may be any one of carbon fiber, steel use stainless (hereinafter, referred to as SUS), or tungsten material.

The ground electrode 40 may be made of a conductive material. The ground electrode 40 may be designed to be in contact with the dielectric filter medium 30, and may be formed in parallel with the second surface 32 to support the dielectric filter medium 30. The ground electrode 40 may be grounded to induce ions generated by the ion generator 20 to be discharged toward the dielectric filter medium 30, and may increase the potential difference between the first surface 31 and the second surface 32. It can be maximized.

FIG. 2 is an enlarged view of a cross section of the dielectric filter medium and the ground electrode of FIG. 1. FIG.

Negative ions released from the ionizer may be attached to the first surface 31 of the dielectric filter medium or the dielectric fiber 33 constituting the dielectric filter medium. Due to the negative ions, the dielectric fiber 33 may be polarized to the positive pole in the direction of the first surface 31 and the negative pole of the second surface direction.

3 is an example of a ground electrode including a conductive fiber according to the present invention. 4 is an image (SEM image) using a scanning electron microscope of the nonwoven fabric structure of the ground electrode including a conductive fiber according to the present invention, Figure 4 (a) is a nonwoven fabric of various shapes using a metal fiber, Figure 4 ( b) is a nonwoven structure using carbon fiber. The carbon fiber includes graphene fiber. 5 is a front view of the conductive fiber of the ground electrode according to the present invention and a ground electrode patterned thereto.

The ground electrode 40 may include conductive fibers. The ground electrode may be a porous electrode 40a of a nonwoven structure including conductive fibers, and may be a porous electrode 40b patterned with conductive fibers. The conductive fiber may be carbon fiber or metal fiber.

6 and 7 are cross-sectional views showing a dust collecting filter according to a second embodiment of the present invention.

The dust collecting filter 10 according to the second embodiment is disposed to be spaced apart from the first filter 310 collecting dielectric particles 300 and the foreign matter such as dust contained in the air upstream of the dielectric filter medium 300. An ion generating device 20 including discharge electrodes 210a and 210b and a ground electrode 400a disposed to face the ion generating device 20 with the dielectric filter medium 300 interposed therebetween. Other configurations and operations other than these are the same as or similar to the first embodiment of the present invention, and the same reference numerals are used, and detailed description thereof will be omitted.

The dielectric filter medium 300 may include a first surface 310 through which air enters and a second surface 320 through which air is discharged. The dielectric filter medium 300 may be formed of the dielectric fiber 330. The dielectric filter medium 300 may be bent to form a plurality of valleys on the first surface 310 and the second surface 320.

The conductive material of the discharge electrode 21 may include carbon fiber. The carbon electrode material discharge electrode 210a may be formed in a brush shape, and a plurality of discharge electrodes 210a may be disposed at a position corresponding to the valley of the first surface 310 in a lattice manner. In the carbon fiber discharge electrode 210a, a plurality of ultrafine carbon fibers are preferably bundled with a brush bundle.

The conductive material of the discharge electrode 21 may include a SUS material. The discharge electrodes 210b may be formed in a rod shape and a needle shape, and a plurality of discharge electrodes 210b may be disposed in a lattice manner at a position corresponding to the valley of the first surface 310.

The ground electrode 400a may be made of a conductive material. The ground electrode 400a may be formed in parallel with the second surface 320 to engage the dielectric filter medium 300 to support bending of the dielectric filter medium 300.

The difference between the dust collecting filter according to the second embodiment and the dust collecting filter according to the first embodiment lies in that the dielectric filter medium is bent to have a plurality of valleys on the first surface 310 and the second surface 320. Therefore, the dust collecting filter according to the present embodiment has an advantage of increasing the cross-sectional area capable of collecting foreign matter in the air, compared to the first embodiment.

8 is a sectional view showing a dust collecting filter according to a third embodiment of the present invention.

The dust collecting filter 10 according to the third embodiment includes an ion generator 20 including a discharge electrode 210c disposed upstream of the dielectric filter medium 300 and spaced apart from the first surface 310. It may include a ground electrode 400b disposed to face the ion generator 20 with the filter medium 300 therebetween. Other configurations and operations are the same as or similar to the first or second embodiment of the present invention, so the same reference numerals are used and detailed description thereof will be omitted.

The discharge electrode 210c according to the third embodiment may be made of a conductive material. The conductive material of the discharge electrode 210c may include a SUS material. The discharge electrodes 210c may be elongated along the valleys of the first surface 310 in a flat plate shape, and a plurality of discharge electrodes 210c may be disposed at positions corresponding to the valleys.

When the discharge electrode 210c has a flat plate shape, a high voltage of a pulse positive may be applied in the high voltage generator. When a high voltage of pulse positive is applied, the amount of ozone generated may be reduced compared to when a high voltage of pulse negative is applied.

The ground electrode 400b may be disposed to be spaced apart from the second surface 320 at a position corresponding to the plurality of valleys provided on the second surface 320. The ground electrode 400b is a flat ground electrode 400b and may be formed to be long along a valley provided on the second surface 320.

The plate-shaped ground electrode 400b may be made of a conductive material. The plate-shaped ground electrode 400b may be grounded to induce ions generated by the ion generator 20 to be discharged toward the dielectric filter medium 30, and the first and second surfaces 310 and 320 may be disposed. The potential difference of can be maximized.

9 is a sectional view showing a dust collecting filter according to a fourth embodiment of the present invention.

The discharge electrode 210d according to the fourth embodiment may be made of a conductive material. The discharge electrode 210d may be a wire electrode made of tungsten material. The wire electrode may be elongated along a valley of the first surface 310, and a plurality of wire electrodes may be disposed at positions corresponding to the valleys.

When the discharge electrode 210d is a wire electrode, a high voltage of a pulse positive may be applied in the high voltage generator. Other configurations and operations are the same as or similar to the third embodiment of the present invention, so the same reference numerals are used and detailed description thereof will be omitted.

10 is a cross-sectional view showing an air conditioner having a dust collecting filter according to an embodiment of the present invention.

The air conditioner 100 having the dust collecting filter 10 may include a filter case (not shown) in which the dielectric filter medium 30 is disposed. The filter case may be installed to be detachable from the air conditioner while the air conditioner is turned off.

The air conditioner 100 may include a blower 102 for blowing air to the dust collecting filter 10. The blower 102 may flow indoor air in the order of the ion generator 20, the first face 31, the second face 32, and the ground electrode 40 of the dielectric filter medium. When the blower 102 is driven, indoor air may flow toward the ion generator 20, and then sequentially pass through the first surface 31, the second surface 32, and the ground electrode 40. .

The air conditioner 100 may include an air intake port I through which air in the room is sucked, and an air discharge port O through which air that is air-conditioned inside the air conditioner is discharged to the room.

When the air conditioner 100 is configured as an air cleaner for cleaning air, the air conditioner 100 may include a dust collecting filter 10 and a blower 102. The air conditioner 100 may include a dust filter 10 and a blower 102 when the air conditioner 100 is configured as an air clean air conditioner that cleans the air and cools the room. It may further comprise a group (104). The air conditioner may include a dust collecting filter 10 and a blower 102 when the air conditioner is configured as an air cleaning heater that cleans the air and heats the room. The heat exchanger 104 heat-exchanges the refrigerant with the air. And, it may further include at least one of a heater (not shown) for generating heat with electricity to heat the air.

The air conditioner is an air inlet I, an ion generating device 20, a first face 31, a second face 32, a blower 102, and an air outlet in the air flow direction A. It is possible to arrange in the order of (O), the air conditioner can suck the air from the outside of the air conditioner to clean and discharge it back to the room.

Of course, the air conditioner may further include a pre-filter (not shown) positioned before the ion generating device 20 in the flow direction A of the air. In this case, the air conditioner is an air inlet I, a prefilter (not shown), an ion generating device 20, a first surface 31, and a second surface 32 in the air flow direction A. FIG. ), The ground electrode, the blower 102, and the air outlet O can be arranged in this order.

In the air conditioner, when the blower 102 is operated, the high voltage generator 22 may be turned on, and the dust collecting filter may collect foreign matter in the air flowing by the blower 102.

Referring to the operation of the dust collecting filter according to the present invention configured as described above are as follows.

When the high voltage generator 22 is operated while the ground electrode 40 is grounded, the high voltage generator 22 may apply a high voltage of a pulse negative to the discharge electrode 21.

When a high voltage of pulse negative is applied to the discharge electrode 21, corona discharge may be generated between the discharge electrode 21 and the ground electrode 40. The corona discharge is charged with molecules of the material contained in the air to generate negative ions or positive ions, and the negative ions move toward the first surface due to the negative voltage applied to the discharge electrode 21 and the potential difference between the ground electrodes of the second surface. Can be.

The negative ions moved toward the first surface 31 may be attached to the first surface 31. Due to the electric field caused by the potential difference between the first surface 31 and the ground electrode 40 due to the negative ions, the dielectric fiber 33 may be polarized to the positive pole in the direction of the first surface 31 and the negative pole in the second surface direction. Can be. Anions released from the ionizer may be attached to the dielectric fibers 33 of the dielectric filter medium. Due to the negative ions, the dielectric fiber 33 may be polarized to the positive pole in the direction of the first surface 31 and the negative pole of the second surface direction.

Air may pass through the discharge electrode 21 in the air flow direction (A). The foreign matter such as dust contained in the air may be charged by the diffusion charge attached to the foreign matter by the ions generated in the ion generating device by the irregular thermal movement, and may flow to the dielectric filter without being charged.

Charged foreign matter in the air flows toward the first surface 31 may be attached to the polarized dielectric fiber 33 may be collected in the dielectric filter medium (30). As the uncharged foreign matter in the air approaches the polarized dielectric fiber 33, polarization occurs, and temporarily has a dipole moment. Accordingly, the uncharged foreign matter may also be attached to the polarized dielectric fiber 33 and collected in the dielectric filter medium 30.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

10: dust collecting filter 20: ion generator
21: discharge electrode 22: high voltage generator
30 dielectric filter medium 31 first surface
32: second surface 33: dielectric fiber
40: grounding electrode 100: air conditioner
102: blower 104: heat exchanger
I: Air inlet O: Air outlet

Claims (10)

A dielectric filter material having a first surface on which air enters and a second surface on which incoming air is discharged, and collecting foreign substances contained in the air;
An ion generator including a discharge electrode disposed upstream of the first surface to emit ions toward the first surface and a high voltage generator for applying a high voltage to the discharge electrode; And
A ground electrode made of a conductive material disposed downstream of the second surface; Dust collecting filter comprising a. The method of claim 1,
The dielectric filter medium is a dust collecting filter formed in the shape of a plate. The method of claim 1,
The dielectric filter medium is bent and formed to have a plurality of valleys on the first and second surfaces,
The discharge electrode is provided with a plurality of dust collecting filters disposed at positions corresponding to the plurality of valleys provided on the first surface. The method of claim 3, wherein
And the ground electrode is disposed in a flat plate shape parallel to the air flow direction at a position corresponding to the plurality of valleys provided on the second surface. The method of claim 1,
And the ground electrode is disposed to be spaced apart from the second surface. The method of claim 1,
The ground electrode is a dust collecting filter is a porous electrode having a nonwoven fabric structure containing a conductive fiber. The method of claim 1,
The ground electrode is a dust collecting filter is a porous electrode patterned conductive fibers. The method of claim 1,
And the high voltage generator applies a pulse negative voltage to the discharge electrode. An air purifier comprising the dust collecting filter according to any one of claims 1 to 8. An air conditioner comprising the dust collecting filter according to any one of claims 1 to 8.

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