Patent Application
20200179946
The present invention relates to a filtering device for removing dust or contaminants, and more particularly, to a filtering device having a structure in which a charger and a dust collector are improved.
Recently, as the air pollution due to fine dust or smog is getting worse, there has been growing attention to devices, such as, for example, an air cleaner for removing fine dust particles.
Such devices include a filtering device to remove dust or pollutants from ambient spaces. The filtering device includes a charger charging the fine dust and a dust collector collecting the charged fine dust.
A general charger, including one electrode and the other electrode having a relatively large width, electrically charges fine dust existing between the both electrodes. Here, the smaller resistance, the more current flows. Thus, the charger intensively charges the fine dust at a region where the distance between the both electrodes is smallest, and relatively mildly charges the fine dust at the other regions. Accordingly, the charging efficiency may be lowered, and the performance of the filtering device may be deteriorated.
In addition, the dust collector may include electrodes for collecting dust, and the charged fine dust can be collected by applying a voltage to the electrodes. The dust collector may become bulky due to the collecting electrodes, and the dust collecting efficiency may be lowered. Therefore, there exists a need for researches to improve the efficiency of the dust collector by making a filtering device compact and improving the performance of a dust collector.
The present invention has been made in an effort to solve the problems of the prior art, and it is an object of the present invention to provide a charger for a filtering device having a structure in which the efficiency of charging fine dust is improved.
It is another object of the present invention to provide a dust collector for a filtering device having a structure in which the efficiency of collecting the charged fine dust is improved.
It is still another object of the present invention to provide a filtering device having a structure in which the efficiency of charging and the efficiency of collecting the charged fine dust are improved.
In accordance with an aspect of the present invention, the above and other objects can be accomplished by providing a charger employed to a filtering device for removing fine dust and charging the fine dust, the charger including a case having one side, through which fine dust is introduced, a plurality of beam electrodes inserted into the case and spaced apart from each other along a depth direction of the case wherein a first voltage is applied thereto, and line electrodes arranged inside the case and spaced apart from the plurality of beam electrodes, respectively, so that a second voltage is applied thereto to generate a voltage difference with the beam electrodes, wherein the fine dust is charged between the beam electrodes and the line electrodes.
Here, the plurality of beam electrodes may be connected to a plurality of first connection parts, and the plurality of first connection parts may be connected to second connection parts in a state in which the first connection parts are spaced apart from each other to then be arranged along a width direction of the case. The case may include beam electrode insertion parts protruding toward the beam electrodes, and at least one or more of the plurality of beam electrodes may be inserted into grooves of the beam electrode insertion parts.
In addition, the charger may further include a fine dust introduction cover having an introduction hole through which the fine dust is introduced and disposed above the beam electrodes to cover an opening of the case. Here, the case may include holding ledges for preventing the fine dust introduction cover from moving along a depth direction of the case, and passing grooves may be formed in the holding ledges to allow at least one or more of the plurality of beam electrodes to pass therethrough.
In addition, elastic parts may be fixed to the interior surface of the case, and the line electrodes maybe connected to the elastic parts.
In accordance with another aspect of the present invention, the above and other objects can be accomplished by providing a dust collector employed to a filtering device for removing fine dust and collecting the charged fine dust, the dust collector including a first dust collecting electrode to which a first dust collecting voltage is applied, a second dust collecting electrode to which a second dust collecting voltage is applied to generate a voltage difference with the first dust collecting electrode, and a dielectric spacer which is disposed between the first dust collecting electrode and the second dust collecting electrode to space the first dust collecting electrode and the second dust collecting electrode apart from each other and to serve as a dielectric, wherein the dielectric spacer is disposed to contact both surfaces of the first dust collecting electrode and both surfaces of the second dust collecting electrode.
The dielectric spacer may include protrusion parts protruding toward at least one of the first dust collecting electrode and the second dust collecting electrode.
Each of the first dust collecting electrode and the second dust collecting electrode may have a conductive layer attached to both surfaces of a base plate.
The dust collector may further include a dust collecting case in which a plurality of first dust collecting electrodes, a plurality of second dust collecting electrodes and a plurality of dielectric spacers are mounted, wherein the plurality of first dust collecting electrodes and the plurality of second dust collecting electrodes are alternately arranged along a width direction of the dust collecting case.
The dust collector may further include a first bus bar connecting the plurality of first dust collecting electrodes to supply the plurality of first dust collecting electrodes with the first dust collecting voltage, and a second bus bar connecting the plurality of second dust collecting electrodes to supply the plurality of second dust collecting electrodes with the second dust collecting voltage.
The conductive layer may be formed on the base plate of each of the first dust collecting electrode and the second dust collecting electrode, an adhesion layer may be formed on the conductive layer, a film may be formed on the adhesion layer, exposing holes may be formed in the adhesion layer, and cutting lines may be formed in regions of the film corresponding to the exposing holes.
In accordance with still another aspect of the present invention, the above and other objects can be accomplished by providing a filtering device for removing fine dust, the filtering device comprising: the charger having the above-stated configuration for charging the fine dust, and the dust collector having the above-stated configuration for collecting the charged fine dust. Here, the filtering device may further include connection rails including a plurality of filtering modules each having the charger and the dust collector overlapping each other and connecting the plurality of filtering modules to one another, wherein guiding grooves are formed in the connection rails to allow the filtering modules to be inserted thereinto and to slidably move.
As described above, the charger according to the present invention includes beam electrodes and line electrodes, thereby improving the efficiency of charging fine dust.
In addition, the dust collector according to the present invention includes a first dust collecting electrode, a second dust collecting electrode and a dielectric spacer, thereby improving the efficiency of collecting the charged fine dust.
In addition, the filtering device according to the present invention includes a charger having beam electrodes and line electrodes and a dust collector having first and second dust collecting electrodes and a dielectric spacer, thereby efficiently collecting fine dust.
Hereinafter, a filtering device including a charger and a dust collector according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
he beam electrodes 130 may function as discharge electrodes, and the line electrodes 150 may be opposite electrodes of the discharge electrodes.
The plurality of beam electrodes 130 are inserted into the case 110 to allow a first voltage to be applied thereto and are spaced apart from each other along a depth direction of the case 110. The plurality of beam electrodes 130 are connected to first connection parts 131, and a plurality of first connection parts 131 are connected to second connection parts 133 in a state in which the plurality of first connection parts 131 are spaced apart from each other to then be arranged along a width direction of the case 110. The line electrodes 150 are arranged inside the case 110 to allow a second voltage to be applied thereto to generate a voltage difference with the beam electrodes 130, and are arranged to be spaced apart from the plurality of beam electrodes 130, respectively. The line electrodes 150 may include wires made of a conductive material.
The fine dust passing between the beam electrodes 130 and the line electrodes 150, which are arranged along the width direction of the case 110 in the above-described manner, may be electrically charged by a discharge current flowing between the plurality of beam electrodes 130 and the line electrode 150.
The fine dust introduction cover 135 may cover the opening formed at one side of the case 110 and may have an introduction hole 137 through which the fine dust is introduced. Here, the fine dust introduction cover 135 may allow the fine dust to pass therethrough but may filter foreign materials having a larger size than the introduction hole 137.
One of the first voltage and the second voltage may be a ground voltage and the other may be a positive voltage, but aspects of the present invention are not limited thereto. For example, the first voltage may be a negative voltage and the second voltage may be a ground voltage, or the first voltage may be a ground voltage and the second voltage may be a positive voltage or a negative voltage. Alternatively, one of the first voltage and the second voltage may be a positive voltage and the other may be a negative voltage. Otherwise, both of the first voltage and the second voltage may be positive voltages or negative voltages. A voltage difference between the first voltage and the second voltage may be as much as the fine dust can be electrically charged.
In Comparative Example, the charger includes line electrodes 150 and plate electrodes 10, which are disposed inside the case 110 without spacing. In this case, charging of fine dust occurs between the line electrodes 150 and the plate electrodes 10.
The smaller resistance, the more discharge current flows. In Comparative Example, the current intensively flows through regions between the line electrode 150 and the plate electrode 10, which are spaced a smallest distance d1 apart from each other, and a discharge current having a relatively small magnitude may flow through a region between the line electrode 150 and the plate electrode 10, which are spaced a greater distance d2 than the distance d1 apart from each other. Accordingly, since the fine dust is highly likely to be intensively charged at the region between the line electrode 150 and the plate electrode 10 spaced the smallest distance d1 apart from each other, only some of the total introduced fine dust may be electrically charged.
However, in Example of the present invention, the plurality of beam electrodes 130 are spaced apart from each other to then be disposed inside case 110, and charging of fine dust occurs between the line electrode 150 and the beam electrodes 130. In this case, currents flow between the plurality of beam electrodes 130 and the line electrode 150, which are spaced apart from each other, and there are many discharge paths therebetween, thereby increasing the fine dust charging probability, compared to Comparative Example. That is to say, if distances between the line electrode 150 and each of the plurality of beam electrodes 130 are equal to each other, fine dust charging may occur between four beam electrodes 130 and the line electrode 150, thereby increasing the fine dust charging efficiency, compared to Comparative Example.
In Examples 1 and 2, corners of the beam electrodes 130 face the line electrode 150. However, in Examples 3 and 4, corners of the beam electrodes 130 may not face the line electrode 150, or the beam electrodes 130 may be shaped to have no corners.
Fine dust charging may be performed more smoothly in Examples 1 and 2 than in Examples 3 and 4. That is to say, since electrical charges tend to be focused on corners of a conductor, the current may smoothly flow between the corners of the beam electrodes 130 and the line electrode 150. Therefore, like in Examples 1 and 2, if the corners of the beam electrodes 130 face the line electrode 150, fine dust charging may be smoothly performed between the beam electrodes 130 and the line electrode 150.
In addition, like in Example 2, if the line electrode 150 is also shaped to have corners and faces corners of the beam electrodes 130, fine dust charging may be more smoothly performed than in Example 1.
Meanwhile, as shown in
In Examples 10 to 14, the beam electrodes 130 may have circular or oval sections and may be in forms of conductive wires. The line electrodes 150 of Examples 10 to 14 may have the same shapes as those of Examples 6 to 9, respectively.
Meanwhile, the case 110 may include beam electrode insertion parts 111 protruding toward the beam electrodes 130, as shown in
The connection members 113 and 115 may extend along depth and width directions of the case 110, and the beam electrode insertion parts 111 may be connected and drawn at interconnection regions of the connection members 113 extending in the depth direction and the connection members 115 extending in the width direction. Since the beam electrodes 130 are inserted into the beam electrode insertion parts 111, positions of the beam electrodes 130 may be fixed.
The filtering device according to an embodiment of the present invention may further include the fine dust introduction cover 135 to allow fine dust to be introduced thereto. In addition, the fine dust introduction cover 135 may have the introduction hole 137 through which the fine dust is introduced and may be disposed above the beam electrodes 130 to cover the opening of the case 110. The fine dust introduction cover 135 may perform a pre-filtering operation of pre-filtering foreign materials or dust having relatively large sizes.
The case 110 may include holding ledges 117 to prevent the fine dust introduction cover 135 from moving in the depth direction of the case 110, as shown in
If the second connection parts 133 are suspended on the holding ledges 117, the beam electrodes 130 positioned lower than the second connection parts 133 may be interfered by the holding ledges 117, so that passing grooves are formed in the holding ledges 117 to allow at least one or more of the plurality of beam electrodes 130 to pass therethrough.
However, if the tension of the line electrodes 150 is not maintained, unlike in Examples of the present invention, sagging of the line electrodes 150 may occur. If sagging of the line electrodes 150 occurs, the distances between the beam electrodes 130 and the line electrodes 150 may vary, so that charging of fine dust may not be smoothly performed. Each of the elastic parts 170 may include a plate spring fixed to the widthwise interior surface of the case 110. If the elastic parts 170 include coil-type springs having variable lengths, unlike in Examples of the present invention, sagging and tugging of the line electrodes 150 may be repeated, thereby constantly varying distances between the beam electrodes 130 and the line electrodes 150. Accordingly, resistances may also be varied depending on the distances between the beam electrodes 130 and the line electrodes 150, thereby changing charging performances. Since a length variation of a plate spring is smaller than that of a coil spring, it is possible to prevent the line electrodes 150 from sagging by maintaining the tension of the line electrodes 150, thereby reducing distance variations between the line electrodes 150 and the beam electrodes 130.
Referring to
Referring to
The dielectric spacer 350 is disposed between the first dust collecting electrode 310 and the second dust collecting electrode 330 and increases a dust collecting capability as a dielectric. The dielectric spacer 350 may space the first dust collecting electrode 310 and the second dust collecting electrode 330 apart from each other and may form the air passing space along which the air can move.
Meanwhile, unlike in Examples of the present invention, if the entire spacings between the first dust collecting electrode 310 and the second dust collecting electrode 330 are all filled with a dielectric, it is difficult for the fine dust to be introduced to the spacings between the first dust collecting electrode 310 and the second dust collecting electrode 330, so that the fine dust may not be smoothly collected. In addition, if spacings are created between the first dust collecting electrode 310 and the second dust collecting electrode 330 without a dielectric, the dust collecting capability may be reduced.
In the dust collector 300 according to an embodiment of the present invention, the dielectric spacer 350 serves as a dielectric and the distance between the first dust collecting electrode 310 and the second dust collecting electrode 330 is maintained, thereby smoothly collecting the fine dust.
As shown in
As described above, since the dielectric spacer 350 contacts both surfaces of each of the first dust collecting electrode 310 and the second dust collecting electrode 330, the volume of the dust collector 300 can be reduced. If the first dust collecting electrode 310, the dielectric spacer 350, the second dust collecting electrode 330, the first dust collecting electrode 310, the dielectric spacer 350, the second dust collecting electrode 330 . . . are arranged in that order, unlike in the dust collector according to an embodiment of the present invention, the numbers of the first dust collecting electrodes 310 and the second dust collecting electrodes 330 are increased, thereby undesirably increasing the volume of the dust collector 300.
Meanwhile, a width of the dielectric spacer 350 may be ¾ times greater than or equal to that of the first dust collecting electrode 310 and may be 3/2 times equal to or less than that of the second dust collecting electrode 330. If the width of the dielectric spacer 350 is ¾ times smaller than that of the first dust collecting electrode 310 or the second dust collecting electrode 330, dust collection may not be smoothly achieved. If the width of the dielectric spacer 350 is 3/2 times greater than that of the first dust collecting electrode 310 or the second dust collecting electrode 330, the dust collecting case (500 of
The dielectric spacer 350 may include a protrusion part protruding toward at least one of the first and second dust collecting electrodes 310 and 330, thereby forming spacings. For example, as shown in
As shown in
Since the conductive layer 343 is formed on both surfaces of the base plate 341, the first dust collecting electrode 310, the dielectric spacer 350, the second dust collecting electrode 330, the dielectric spacer 350, the first dust collecting electrode 310, . . . may be arranged in that order, as described above with reference to
Referring to
Referring to
Meanwhile, as shown in
Polarities of the first dust collecting voltage and the second dust collecting voltage respectively applied to the first dust collecting electrode 310 and the second dust collecting electrode 330 may be reversed. For example, in the middle of applying a positive voltage and a negative voltage to the first dust collecting electrode 310 and the second dust collecting electrode 330, respectively, voltage polarities may be reversed so that a negative voltage and a positive voltage are applied to the first dust collecting electrode 310 and the second dust collecting electrode 330, respectively.
The charged fine dust is attached to the first and second dust collecting electrodes 310 and 330, and with the passage of time, it may become difficult to separate the attached charged fine dust from the first and second dust collecting electrodes 310 and 330 due to oil or sticky substance. To avoid this, when necessary, polarities of the first and second dust collecting voltages may be reversed, thereby easily separating the attached fine dust from the first and second dust collecting electrodes 310 and 330. In order to easily separate the fine dust from the first and second dust collecting electrodes 310 and 330, in addition to the reversing of polarities, voltage magnitudes may be varied such that a high-potential first dust collecting voltage and a low-potential second dust collecting voltage may first be applied to the first dust collecting electrode 310 and the second dust collecting electrode 330, and a low-potential first dust collecting voltage and a high-potential second dust collecting voltage may then be applied to the first dust collecting electrode 310 and the second dust collecting electrode 330.
In addition, as shown in
Meanwhile, a resistor may be connected to at least one of the beam electrode 130 and the line electrode 150 of the charger 100. If the resistor is connected to the beam electrode 130, the magnitude of the first voltage may be adjusted according to the magnitude of the resistor connected to the beam electrode 130. If the resistor is connected to the line electrode 150, the magnitude of the second voltage may be adjusted according to the magnitude of the resistor connected to the line electrode 150. Similarly, the resistor may be connected to at least one of the first dust collecting electrode 310 and the second dust collecting electrode 330 of the dust collector 300. Therefore, the magnitudes of the first dust collecting voltage and the second dust collecting voltage may be adjusted according to the magnitude of the resistor.
The magnitude of voltage may be so adjusted as not to cause electric shocks to users, installers or maintenance/repair technicians by connecting the resistor in the above-described manner. In addition, if the magnitude of power externally applied to the filtering device according to an embodiment of the present invention is excessively high, it can be appropriately lowered.
Referring to
Next, a film 349 may be formed on the adhesion layer 345, as shown in
Exposed regions of the conductive layer 343 are formed in such a manner because lengths of the first dust collecting electrode 310 and the second dust collecting electrode 330 vary according to the size of the filtering device according to the embodiment of the present invention. For example, if the first and second dust collecting electrodes 310 and 330 are rolled in roll types, as shown in
However, if regions of the conductive layer 343 connected to the wires are set in a state in which the lengths of the first dust collecting electrode 310 and the second dust collecting electrode 330 depending on the sizes or design conditions have yet to be determined, the set regions may not match with regions for the wires required by the first dust collecting electrode 310 and the second dust collecting electrode 330, which cut in a later stage. To avoid this, multiple regions of the exposing holes 347, as shown in
As described above, the plurality of filtering modules FM are connected to one another by the connection rails 910, thereby filtering fine dust over a wide area. In addition, the number of filtering modules FM's connected to one another may be changed as desired by the user. Therefore, the filtering device according to the present invention may have increased installation flexibility according to the place or conditions.
Charging contact terminals for applying first and second voltages to the chargers 100 of the filtering modules FM's may be formed on interior surfaces of the connection rails 910. The plurality of beam electrodes 130 may be connected to a common node, which may contact the charging contact terminal for applying the first voltage to the plurality of beam electrodes 130. In addition, the plurality of line electrodes 150 may also be connected to the common node, which may contact the charging contact terminal for applying the second voltage to the line electrodes 150. Similarly, dust collecting contact terminals for applying first and second dust collecting voltages to the dust collectors 300 of the filtering modules FM's may be formed on the interior surfaces of the connection rails 910.
The charging contact terminals and the dust collecting contact terminals may be insulated from each other to prevent the charging contact terminals and the dust collecting contact terminals from being short-circuited. The connection rails 910 may be made of, for example, nonconductors, and the charging contact terminals and the dust collecting contact terminals may be spaced apart from each other. Since the charging contact terminals and the dust collecting contact terminals are formed on the interior surfaces of the connection rails 910, as described above, the number of wires for applying the first and second voltages and the first and second dust collecting voltages to the plurality of filtering modules FM's is reduced, thereby simplifying the structure of the filtering device and increasing feasibility of facilitated installation.
Although the present invention has been described with respect to the foregoing embodiments, these embodiments are set forth for illustrative purposes and do not serve to limit the invention. Those skilled in the art will readily appreciate that many modifications and variations can be made, without departing from the spirit and scope of the invention as defined in the appended claims, and such modifications and variations are encompassed within the scope and spirit of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2017-0015566 | Feb 2017 | KR | national |
| 10-2017-0015573 | Feb 2017 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2018/001503 | 2/5/2018 | WO | 00 |
