WO2024039077A1

WO2024039077A1 - Electrostatic precipitator

Info

Publication number: WO2024039077A1
Application number: PCT/KR2023/010109
Authority: WO
Inventors: 강명수; 노형수; 송명섭; 신규호; 신준오
Original assignee: 삼성전자주식회사
Priority date: 2022-08-19
Filing date: 2023-07-14
Publication date: 2024-02-22
Also published as: KR20240025860A

Abstract

An electrostatic precipitator is disclosed. The disclosed electrostatic precipitator comprises: a plurality of first electrodes that extend along a first direction from upstream to downstream of an air flow path and includes a first dielectric layer and a first electrode layer inside the first dielectric layer, and to which a first voltage is applied; a plurality of second electrodes that are alternately arranged in a second direction orthogonal to the plurality of first electrodes and the first direction and includes a second dielectric layer and a second electrode layer inside the second dielectric layer, and to which a second voltage higher than the first voltage is applied; and a counter electrode disposed upstream of the air flow path and spaced apart in a direction opposite to the first direction to face the plurality of second electrodes, and to which a third voltage lower than the second voltage is applied, wherein the plurality of second electrodes includes a discharge part provided to expose the second electrode layer to the outside so as to charge the counter electrode.

Description

electrostatic precipitator

The present disclosure relates to an electrostatic precipitator, and more particularly, to an electrostatic precipitator with an improved structure.

High concentrations of aerosols in closed spaces such as homes, rooms, shopping malls, factories, and offices can cause problems to people's health. These aerosols can be generated by smoking, cooking, cleaning, welding, grinding, etc. in confined spaces.

An electrostatic precipitator is a device for removing such aerosols and can be used in air purifiers or air conditioners with an air purifying function.

The electrostatic precipitator may include a charging unit that charges aerosols in the air through discharge, and a dust collection unit that is composed of a high-voltage electrode and a low-voltage electrode and collects aerosols charged by the charging unit.

Since the electrostatic precipitator has a separate charging unit and dust collection unit, the number of components is large and a process for assembling each component may be required.

One aspect of the present disclosure provides an electric dust collection device with an improved structure by integrating a discharge unit and a dust collection unit.

Another aspect of the present disclosure provides an electrostatic precipitator with improved aerosol charging performance.

Another aspect of the present disclosure provides an electrostatic precipitator capable of preventing sparks from occurring.

The electrostatic precipitator according to the present disclosure extends along a first direction from upstream to downstream of the air flow path, includes a first dielectric layer, a first electrode layer inside the first dielectric layer, and to which a first voltage is applied. A plurality of first electrodes, arranged alternately in a second direction perpendicular to the plurality of first electrodes and the first direction, comprising a second dielectric layer and a second electrode layer inside the second dielectric layer, A plurality of second electrodes to which a second voltage higher than 1 voltage is applied, and a second electrode lower than the second voltage, spaced apart in a direction opposite to the first direction and disposed upstream of the air flow path to face the plurality of second electrodes. It includes a corresponding electrode to which three voltages are applied, and the plurality of second electrodes include a discharge portion provided to expose the second electrode layer to the outside so as to charge the corresponding electrode.

The second dielectric layer of the plurality of second electrodes may include an opening formed to expose the second electrode layer to the outside.

The opening portion may be opened toward the upstream of the air passage so that the ions generated from the discharge portion move toward the upstream of the air passage.

The second electrode includes one end in the first direction and the other end disposed downstream of the air flow path from the one end, and the opening may be formed at the one end.

The second electrode includes an upper surface and a lower surface located opposite to the upper surface, and the one end may be provided to connect the upper surface and the lower surface in the second direction.

The corresponding electrode may have a cylindrical shape.

The discharge unit includes a first edge portion and a second edge portion located at both ends along a third direction perpendicular to the first direction and the second direction, and the first edge portion and the second edge portion include a round shape. can do.

The discharge unit includes a first discharge unit and a second discharge unit disposed to be spaced apart in the second direction, and the corresponding electrode includes a first corresponding electrode disposed to face the first discharge unit, the first corresponding electrode, and the It may include a second corresponding electrode spaced apart in a second direction and disposed to face the second discharge unit.

The corresponding electrode may extend along a third direction orthogonal to the first direction and the second direction.

The discharge unit may extend in a straight line along a third direction perpendicular to the first direction and the second direction.

The corresponding electrode may include metal.

The plurality of first electrodes include a first dust collector through which aerosol is collected, the plurality of second electrodes include a second dust collector forming an electric field with the first dust collector, and the second dust collector is separated from the discharge unit. It may be extended.

The second dust collection unit may be disposed downstream of the air flow path from the discharge unit.

The discharge unit and the second dust collection unit may be formed integrally.

The electrostatic precipitator connects the plurality of first electrodes and the plurality of second electrodes, and further includes a plurality of bending parts bent in a zigzag manner so that the plurality of first electrodes and the plurality of second electrodes face each other. can do.

The electrostatic precipitator according to the present disclosure includes a first dielectric layer, a first electrode layer inside the first dielectric layer, a plurality of first electrodes to which a first voltage is applied to collect aerosol, and the plurality of first electrodes. and a plurality of electrodes arranged alternately and including a second dielectric layer and a second electrode layer inside the second dielectric layer, to which a second voltage higher than the first voltage is applied to form an electric field with the plurality of first electrodes. A dust collection sheet including two electrodes and a corresponding electrode disposed to face the dust collection sheet and to which a third voltage lower than the second voltage is applied, wherein the plurality of second electrodes of the dust collection sheet generate ions. It may include a discharge portion provided so that the second electrode layer is exposed to the outside to act as a charging agent with the corresponding electrode.

The corresponding electrode may be disposed upstream of the air flow path from the dust collection sheet, and ions generated from the discharge unit may be disposed to move upstream.

The corresponding electrode may have a cylindrical shape.

The plurality of first electrodes include a first dust collection unit in which aerosol is collected, the plurality of second electrodes include a second dust collection unit that forms an electric field with the first dust collection unit, and the second dust collection unit is connected to the discharge unit. It can be formed integrally.

An electric dust collection device according to the present disclosure includes a dust collection sheet provided to generate ions and collect aerosols charged by the ions, and an air flow path rather than the dust collection sheet so that the ions generated from the dust collection sheet charge the aerosols. It includes a corresponding electrode disposed upstream, and the dust collection sheet includes a first dielectric layer, a first electrode layer inside the first dielectric layer, and a plurality of first electrodes to which a first voltage is applied to collect aerosol, and It is alternately arranged with the plurality of first electrodes, and includes a second dielectric layer, and a second electrode layer that is partially exposed to the outside through an opening of the second dielectric layer to generate ions, and has a second voltage higher than the first voltage. It includes a plurality of applied second electrodes.

According to one aspect of the present disclosure, the structure can be simplified and manufacturing costs can be reduced by integrating the discharge unit and dust collection unit of the electric dust collector.

According to another aspect of the present disclosure, by improving the structure of the electrostatic precipitator, the charging performance of aerosol is improved, so that the electrostatic precipitator can operate efficiently.

According to another aspect of the present disclosure, the generation of sparks can be prevented by preventing the electric field from concentrating on a specific sharp part.

Figure 1 is a perspective view showing a dust collection unit and a charging unit of an electrostatic precipitator.

FIG. 2 is an enlarged view of the charging unit shown in FIG. 1.

Figure 3 is an exploded perspective view of the dust collection unit shown in Figure 1.

Figure 4 is a perspective view of the first electrode.

Figure 5 is a perspective view of the second electrode.

Figure 6 is a side cross-sectional view of the dust collection sheet and charging unit of the electrostatic precipitator.

FIG. 7 is a side cross-sectional view showing the process in which aerosol is charged and collected on a dust collection sheet when the second electrode in FIG. 6 generates positive ions.

Figure 8 is a side cross-sectional view showing the process in which aerosol is charged and collected on a dust collection sheet when the second electrode generates negative ions in Figure 6.

Figure 9 is a side cross-sectional view showing a dust collection sheet with a bending portion formed thereon.

FIG. 10 is a plan view showing the development of the dust collection sheet shown in FIG. 9 before bending. Figure 11 is an enlarged view of Figure 10.

Figure 12 is a perspective view of the second electrode cut by the slit of Figure 11.

The embodiments described in this specification and the configurations shown in the drawings are only preferred examples of the disclosed invention, and at the time of filing this application, there may be various modifications that can replace the embodiments and drawings in this specification.

In addition, the same reference numbers or symbols shown in each drawing of this specification indicate parts or components that perform substantially the same function.

Additionally, the terms used herein are used to describe embodiments and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. The existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

In addition, terms including ordinal numbers such as “first”, “second”, etc. used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms It is used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

Meanwhile, the terms “front,” “top,” “bottom,” “left,” and “right” used in the following description are defined based on the drawings, and the shapes and positions of each component are limited by these terms. It doesn't work.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

The electrostatic precipitator 1 is a device for removing aerosols generated by activities such as smoking, cooking, cleaning, welding, and grinding within a certain space. The electrostatic precipitator 1 may be installed inside a device capable of performing an air filtering function, such as an air conditioner or air purifier.

An air purifier or air conditioner (not shown) includes an inlet (not shown) through which external air flows in, an electrostatic precipitator (1) that filters the air flowing in through the inlet, and a blowing fan (not shown) that moves the air. ) may include. An air purifier or air conditioner may include an outlet (not shown) through which air filtered by a filter member is discharged. By the operation of the blowing fan, air can flow through the intake port, the electrostatic precipitator 1, and the discharge port.

Devices such as air purifiers or air conditioners may include various filter devices in addition to the electrostatic precipitator 1. For example, a fine dust collection filter and/or a granular activated carbon filter in the form of a non-woven fabric made of polypropylene resin or polyethylene resin may be optionally provided.

Figure 1 is a perspective view showing a dust collection unit and a charging unit of an electrostatic precipitator. FIG. 2 is an enlarged view of the charging unit shown in FIG. 1.

Referring to FIG. 1, the electrostatic precipitator 1 may include a charging unit 3 and a dust collection unit 2.

The air may pass through the charging unit (3) and then through the dust collection unit (2). That is, an air flow path may be formed in the electrostatic precipitator 1, and the direction from upstream to downstream of the air flow path may be defined as the first direction (A → A').

The charging unit 3 may be disposed upstream of the air flow path than the dust collection unit 2. The charging unit 3 and the dust collection unit 2 may be arranged along the first direction (A → A').

The dust collection unit 2 may be disposed downstream of the air flow path than the charging unit 3. The charging unit 3 may be arranged to be spaced apart from the dust collection unit 2 in a direction (A' → A) opposite to the first direction (A → A').

In this drawing, since the electrostatic precipitator 1 is shown as an example of being arranged perpendicular to the ground, the air flows from the front to the rear, so that the first direction (A → A') may be a direction from the front to the rear. there is. At this time, the charging unit 3 may be located in front of the dust collection unit 2.

However, the present disclosure is not limited to this, and when the electrostatic precipitator 1 is disposed horizontally with the ground, the air flows from downward to upward so that the first direction may be from downward to upward. At this time, the charging unit 3 may be located below the dust collection unit 2.

That is, the arrangement structure of the charging unit 3 and the dust collection unit 2 is not limited to the example, and if the charging unit 3 is implemented to be arranged upstream of the air flow path than the dust collection unit 2, various arrangement structures can be applied. You can.

Referring to FIG. 2, the charging unit 3 may include a corresponding electrode 300 and a connecting bar 30. The corresponding electrode 300 may include a first corresponding electrode 300a and a second corresponding electrode 300b. The second corresponding electrode 300b may be spaced apart from the first corresponding electrode 300a along the second direction (B↔B'). The second direction (B↔B') may be perpendicular to the first direction (A→A'). In this drawing, the second direction (B↔B') may be a vertical direction.

The corresponding electrode 300 of the charging unit 3 may extend along the third direction (C↔C'). The third direction (C↔C') may be perpendicular to the first direction (A→A') and the second direction (B↔B'). In this drawing, the third direction (C↔C') may be a left-right direction.

The connection bar 30 may include a first connection bar 30a and a second connection bar 30b. The second connection bar 30b may be spaced apart from the first connection bar 30a along the third direction (C↔C').

The connecting bar 30 may connect the first corresponding electrode 300a and the second corresponding electrode 300b. The first connection bar 30a and the second connection bar 30b may be formed at both ends of the corresponding electrode 300 and coupled to the corresponding electrode 300.

The corresponding electrode 300 may have a cylindrical shape. Therefore, in the charging action with the discharge unit 220, which will be described later, it is possible to prevent the electric field from concentrating on a sharp specific part and generating sparks. The counter electrode 300 may include metal for charging action with the discharge unit 220 .

Figure 3 is an exploded perspective view of the dust collection unit shown in Figure 1. Figure 4 is a perspective view of the first electrode. Figure 5 is a perspective view of the second electrode.

Referring to FIG. 3, the dust collection unit 2 may include a dust collection sheet 10. The dust collection unit 2 may include a cover 20 that covers the dust collection sheet 10.

The cover 20 may be shaped like a frame surrounding the outer edge of the dust collection sheet 10. The cover 20 of the dust collection unit 2 may include a first cover 21 and a second cover 23. The first cover 21 and the second cover 23 may be combined. The dust collection sheet 10 may be provided between the first cover 21 and the second cover 23 and may be protected by the first cover 21 and the second cover 23.

The first cover 21, the dust collection sheet 10, and the second cover 23 may be arranged along the first direction (A → A'). For example, when the dust collection unit 2 is disposed perpendicular to the ground, the first cover 21 is provided in front of the dust collection sheet 10, and the second cover 23 is provided at the rear of the dust collection sheet 10. It can be provided in . Air may pass through the dust collection sheet 10 through the

openings

21H and 23H formed inside each of the first cover 21 and the second cover 23.

4 and 5, the dust collection sheet 10 may include a plurality of

electrodes

100 and 200, and the plurality of

electrodes

100 and 200 extend along the first direction (A → A'). It can be. That is, as air flows in the first direction (A → A'), it may pass between the plurality of

electrodes

100 and 200 extending in the first direction (A → A').

Referring to FIG. 3, the plurality of second electrodes 200 may be alternately arranged with the plurality of first electrodes 100 in the second direction (B↔B') to form the dust collection sheet 10. Additionally, the dust collection sheet 10 may extend long along the third direction (C↔C').

Referring to FIGS. 4 and 5 , the dust collection sheet 10 may include

dielectric layers

101 and 201 and

electrode layers

102 and 202. The

dielectric layers

101 and 201 may include a non-conductive material and may include a polyethyleneterephthalate (PET) film. The electrode layers 102 and 202 may include a conductive material printed or deposited inside the

dielectric layers

101 and 201, and may also include a conductive metal such as a carbon thin film or aluminum. The manufacturing method of the dust collection sheet 10 will be described later with reference to FIG. 10.

Referring to FIG. 4 , the dust collection sheet 10 may include a first electrode 100. The first electrode 100 may include a first dielectric layer 101 and a first electrode layer 102. The first electrode layer 102 may be provided inside the first dielectric layer 101.

The first dielectric layer 101 may include a first upper dielectric layer 101a disposed above and a first lower dielectric layer 101b disposed below the first electrode layer 102. The first dielectric layer 101 may be formed by bonding a first upper dielectric layer 101a and a first lower dielectric layer 101b. The first dielectric layer 101 may be formed integrally without being divided into an upper and lower part.

Referring to FIG. 5 , the dust collection sheet 10 may include a second electrode 200. The second electrode 200 may include a second dielectric layer 201 and a second electrode layer 202. The second electrode layer 202 may be provided inside the second dielectric layer 201.

The second dielectric layer 201 may include a second upper dielectric layer 201a disposed above and a second lower dielectric layer 201b disposed below the second electrode layer 202. The second dielectric layer 201 may be formed by bonding a second upper dielectric layer 201a and a second lower dielectric layer 201b. The second dielectric layer 201 may be formed integrally without being divided into an upper and lower part.

The second electrode 200 may extend along the first direction (A→A’). The second electrode 200 may include one end 205 and the other end 206 in the first direction (A→A’). The other end 206 may be disposed downstream of the air flow path than the end 205.

The second electrode 200 may include an upper surface 207 and a lower surface 208 located opposite to the upper surface 207. The upper surface 207 may be provided on the second upper dielectric layer 201a, and the lower surface 208 may be provided on the second lower dielectric layer 201b.

One end 205 of the second electrode 200 may be provided between the upper surface 207 and the lower surface 208. One end 205 may be provided to connect the upper surface 207 and the lower surface 208 in the second direction (B↔B').

The second electrode 200 may include an open portion 210 . The open portion 210 may be a portion where the second dielectric layer 201 is opened so that the second electrode layer 202 provided inside the second dielectric layer 201 is exposed to the outside.

Specifically, when a corner formed on one side of the second electrode 200 is cut, the second dielectric layer 201 may be opened and a portion of the second electrode layer 202 may be exposed to the outside. At this time, when a voltage is applied to the second electrode layer 202, a corona discharge may occur in the second electrode layer 202 exposed to the outside, thereby generating ions.

That is, a discharge portion 220 provided to generate ions may be formed by the opening portion 210. The discharge unit 220 may include a discharge electrode 221. The portion of the second electrode layer 202 exposed to the outside through the opening 210 may be the discharge electrode 221. The second electrode layer 202 may include a discharge electrode 221 formed at one end 205.

The opening portion 210 and/or the discharge portion 220 may be disposed upstream of the air flow path. The open portion 210 and/or the discharge portion 220 may be formed at one end 205 of the second electrode 200 . Since the opening portion 210 is open toward the upstream of the air passage, ions generated by the discharge portion 220 can move toward the upstream of the air passage. This will be described later in Figure 7.

The open portion 210 and/or the discharge portion 220 may be formed linearly. The opening portion 210 and/or the discharge portion 220 may be formed in a straight line along the third direction (C↔C’). Therefore, when voltage is applied to the second electrode layer 202, ions can be generated uniformly in the entire area of the discharge unit 220. Additionally, the electric field can be concentrated on a specific sharp part, preventing sparks from occurring.

The dust collection sheet 10 may be electrically connected to the power supply unit 400. The first electrode 100 may be supplied with a first voltage from the power supply unit 400 and may be connected to the ground unit (G). A second voltage may be applied to the second electrode 200 from the power supply unit 400. The second voltage may be a higher voltage than the first voltage.

In this drawing, the first electrode 100 is connected to the ground portion (G) and the second electrode 200 is connected to the power supply portion 400. However, in the present disclosure, the first electrode 100 and the second electrode 200 are connected to the power supply portion 400. It may include various circuits for applying a potential difference to the two electrodes 200.

That is, even if the first electrode 100 is connected to the power supply unit 400 rather than the ground unit (G), the first voltage applied to the first electrode 100 is higher than the second voltage applied to the second electrode 200. Therefore, if the first electrode 100 forms a low voltage electrode and the second electrode 200 forms a high voltage electrode, it can be implemented through another type of circuit.

When a voltage difference occurs between the first electrode 100 and the second electrode 200, the second electrode 200, which is a high voltage electrode, acts as a positive (+) electrode, and the first electrode 100, which is a low voltage electrode, acts as a negative (-) electrode. ) can be formed as an electrode. Here, the plus (+) electrode and the minus (-) electrode are based on the potential difference between the two electrodes. The side with the higher potential (high level) is the plus (+) electrode, and the side with the lower potential (low level) is the minus (-) electrode. It may be expressed as . An electric field may be formed between the first electrode 100 and the second electrode 200.

The first electrode 100 may include a first dust collection unit 230, and the second electrode 200 may include a second dust collection unit 231. The first dust collection unit 230 may form a minus (-) electrode, and the second dust collection part 231 may form a plus (+) electrode. An electric field is formed between the first dust collection unit 230 and the second dust collection unit 231, so that aerosols can be collected in the first dust collection unit 230.

Unlike the first electrode 100, the second electrode 200 may form a discharge portion 220 due to an open portion 210. Since the opening portion 210 is open toward the upstream of the air passage, ions generated by the discharge portion 220 can move toward the upstream of the air passage. That is, the ions generated by the discharge unit 220 can move toward the opposite direction (A' → A) of the first direction (A → A'), which is the direction of air flow, and at this time, the direction of movement of the ions is the air flow direction. It can go against the direction.

The second dust collection unit 231 may extend from the discharge unit 220. The second dust collection unit 231 may be disposed downstream of the air flow path from the discharge unit 220. The discharge unit 220 and the second dust collection unit 231 may be arranged along the first direction (A→A’). The discharge unit 220 and the second dust collection unit 231 may be formed integrally.

That is, by forming the discharge part 220 by forming the open part 210 in the second electrode 200 of the dust collection sheet 10, a separate discharge part may not be needed. The second electrode layer 202 of the second electrode 200 forms an electric field with the first electrode 100 so that the charged aerosol is in the first dust collection unit 231 of the first electrode 100. In addition to the role of the second dust collection unit 231 to collect ions, it can also serve as a discharge electrode 221 that acts as a charger with the corresponding electrode 300 to generate ions and charge the aerosol. Therefore, the electrostatic precipitator 1 can omit the configuration of a separate discharge unit, simplifying the structure and reducing manufacturing costs.

A charging unit 3 may be disposed upstream of the dust collection sheet 10. A corresponding electrode 300 may be disposed upstream of the second electrode 200. The discharge unit 220 may include a first discharge unit 220a and a second discharge unit 220b spaced apart from the first discharge unit 220a in the second direction (B↔B’). The counter electrode 300 may include a first counter electrode 300a disposed to face the first discharge unit 220a and a second counter electrode 300b disposed to face the second discharge unit 220b. . The second corresponding electrode 300b may be arranged to be spaced apart from the first corresponding electrode 300a in the second direction (B↔B').

A third voltage may be applied to the connection bar 30 to which the corresponding electrode 300 is connected. That is, the corresponding electrode 300 may be applied with a third voltage from the power supply unit 400, or may be connected to the ground unit G and applied with the third voltage. The third voltage may be lower than the second voltage applied to the second electrode 200.

A corona discharge may occur between the discharge electrode 221 of the discharge unit 220 and the corresponding electrode 300 of the charging unit 3, thereby causing charging.

Air can pass through the charging unit 3 and the dust collection sheet 10 along the first direction (A → A').

By applying a high voltage of positive (+) polarity to the second electrode 200 of the dust collection sheet 10, the discharge unit 220 can generate positive ions (+). In other words, aerosol in the air can be charged to the positive pole (+) through corona discharge of the discharge electrode 221 and the corresponding electrode 300. The charged aerosol can move to the dust collection sheet 10 disposed downstream of the air flow path along the first direction (A → A'). Specifically, aerosol charged to the plus pole (+) may be collected in the first dust collection unit 230 of the first electrode 100 of the minus (-) pole. Therefore, the air that has passed through the electric dust collector 1 can be discharged in a clean state with aerosols removed.

At this time, since the counter electrode 300 is disposed upstream of the air flow path than the discharge electrode 221, ions generated by the discharge electrode 221 are directed in the first direction (A → A') and in the opposite direction (A' → A). ) moves toward . In other words, ions move against the direction of air flow and charge the aerosol. Therefore, aerosol charged by ions moves along the air flow direction and can be collected in the first dust collection unit 230.

In other words, when the charged aerosol moves toward the corresponding electrode 300, the aerosol may be collected in the corresponding electrode 300 and the charging performance may deteriorate. However, in the present disclosure, by disposing the counter electrode 300 upstream of the air flow path than the discharge electrode 221, the charged aerosol must move against the direction of air flow in order to move toward the counter electrode 300. That is, since the charged aerosol moves along the air flow direction, it can be prevented from being collected in the corresponding electrode 300 disposed upstream of the air flow path. Therefore, the charging performance and efficiency of the electrostatic precipitator 1 can be improved.

When a high voltage of negative (-) polarity is applied to the second electrode 200 of the dust collection sheet 10, the discharge unit 220 may generate negative ions (-). In other words, aerosol in the air can be charged to the negative pole (-) through corona discharge of the discharge electrode 221 and the corresponding electrode 300. Aerosols charged to the minus pole (-) may be collected in the first dust collection unit 230 of the first electrode 100 of the plus (+) pole. Descriptions overlapping with FIG. 7 are omitted.

The dust collection sheet 10 may include a bending portion 250 connecting the plurality of first electrodes 100 and the plurality of second electrodes 200. The bending portion 250 may be formed by bending the plurality of first electrodes 100 and the plurality of second electrodes 200 in a zigzag manner so that they face each other.

The bending portion 250 may be bent to form a curved surface between the first electrode 100 and the second electrode 200 of the dust collection sheet 10. In addition, the bending portion 250 may be in the shape of a plane bent in the vertical direction from the first electrode 100 and the second electrode 200, and may also be connected to the first electrode 100 and the second electrode of the dust collection sheet 10. It may be configured in the shape of an edge formed by folding the space between the two electrodes 200 in a straight line.

Specifically, a first dielectric layer 101 including a first electrode layer 102 therein is disposed on one side of the bending portion 250, and a first dielectric layer 101 including a second electrode layer 202 therein is disposed on the other side of the bending portion 250. The second dielectric layer 201 is disposed to face the first dielectric layer 101. Through this, the plurality of first electrodes 100 and the plurality of second electrodes 200 can be arranged to be alternately stacked along the longitudinal direction of the dust collection sheet 10.

FIG. 10 is a plan view showing the development of the dust collection sheet shown in FIG. 9 before bending.

The dust collection sheet 10 may include a first sheet 11 and a second sheet 12. First electrode layers 102 and second electrode layers 202 are alternately disposed on one surface of the first sheet 11, and the first sheet 11 on which the first electrode layers 102 and second electrode layers 202 are disposed. By combining the second sheet 12 on one surface, a plurality of first electrode layers 102 and a plurality of second electrode layers 202 can be disposed between the first sheet 11 and the second sheet 12. . The first sheet 11 and the second sheet 12 can be laminated to form one dust collection sheet 10.

The first sheet 11 and the second sheet 12 may correspond to the

dielectric layers

101 and 201 of FIGS. 4 and 5 . The first sheet 11 and the second sheet 12 may include a polyethyleneterephthalate (PET) film.

The first electrode layer 102 and the second electrode layer 202 may be composed of a conductive pattern printed or deposited on one side of the first sheet 11, and a conductive carbon thin film may be applied to one side of the first sheet 11. It can be formed by printing or depositing a conductive metal such as aluminum.

A first power connector 15 and a second power connector 16 are disposed on one side of the first sheet 11 to connect a power source to the first electrode layer 102 and the second electrode layer 202 to apply a voltage. You can.

The dust collection sheet 10 may include slits S1 and S2 formed between the plurality of first electrode layers 102 and the plurality of second electrode layers 202, respectively. The slits S1 and S2 may be formed by cutting between the plurality of first electrode layers 102 and the plurality of second electrode layers 202. The dust collection sheet 10 can be bent in a zigzag pattern around the slits S1 and S2.

At this time, the dust collection sheet 10 may include a first slit S1 formed along one edge of the second electrode layer 202 so that one edge of the second electrode layer 202 is exposed to the outside.

The dust collection sheet 10 may include a second slit S2 formed in the central portion between one edge of the second electrode layer 202 and the other edge of the adjacent first electrode layer 102 .

Figure 11 is an enlarged view of Figure 10.

The first slit S1 may be formed along one edge of the second electrode layer 202. By cutting along the first slit S1, an open portion 210 of the second dielectric layer 201 is formed, and a portion of the second electrode layer 202 is exposed to the outside to form a discharge portion 220.

The first edge portion 209a and the second edge portion 209b located at both ends of the discharge unit 220 may have a round shape. That is, the first edge portion 209a and the second edge portion 209b may be formed in a curve along the first slit S1.

The first edge portion 209a and the second edge portion (not shown) located at both ends along the third direction (C↔C’) of the discharge unit 220 may have a round shape. Therefore, when the discharge unit 220 generates ions, the electric field can be concentrated on a sharp specific part to prevent sparking from occurring.

In the above, specific embodiments are shown and described. However, it is not limited to the above-described embodiments, and those skilled in the art can make various changes without departing from the gist of the technical idea of the invention as set forth in the claims below. .

Claims

a plurality of first electrodes extending along a first direction from upstream to downstream of the air flow path, including a first dielectric layer, a first electrode layer inside the first dielectric layer, and to which a first voltage is applied;

The plurality of first electrodes are alternately arranged in a second direction orthogonal to the first direction, and include a second dielectric layer and a second electrode layer inside the second dielectric layer, and a second voltage higher than the first voltage. a plurality of second electrodes to which voltage is applied; and

a corresponding electrode disposed upstream of the air flow path and spaced apart in a direction opposite to the first direction to face the plurality of second electrodes, and to which a third voltage lower than the second voltage is applied; Including,

The plurality of second electrodes include a discharge unit provided so that the second electrode layer is exposed to the outside so as to charge the corresponding electrode.
According to claim 1,

The second dielectric layer of the plurality of second electrodes includes an opening formed to expose the second electrode layer to the outside.
According to clause 2,

An electric dust collector in which the opening portion is opened toward the upstream of the air passage so that ions generated from the discharge portion move toward the upstream of the air passage.
According to clause 3,

The second electrode includes one end in the first direction and the other end disposed downstream of the air flow path from the one end,

An electric dust collector wherein the opening is formed at one end.
According to clause 4,

The second electrode includes an upper surface and a lower surface located opposite to the upper surface,

The electric dust collector is provided so that the one end connects the upper surface and the lower surface in the second direction.
According to claim 1,

An electrostatic precipitator wherein the corresponding electrode has a cylindrical shape.
According to claim 1,

The discharge unit includes a first edge portion and a second edge portion located at both ends along a third direction perpendicular to the first direction and the second direction,

The first edge portion and the second edge portion are electrical dust collection devices including a round shape.
According to claim 1,

The discharge unit includes a first discharge unit and a second discharge unit arranged to be spaced apart in the second direction,

The counter electrode includes a first counter electrode disposed to face the first discharge unit and a second counter electrode disposed to face the second discharge unit and spaced apart from the first counter electrode in the second direction. cyclone.
According to claim 1,

The corresponding electrode is an electrostatic precipitator extending along a third direction perpendicular to the first direction and the second direction.
According to claim 1,

The electric discharge unit extends in a straight line along a third direction orthogonal to the first direction and the second direction.
According to claim 1,

An electrostatic precipitator wherein the corresponding electrode includes a metal.
According to claim 1,

The plurality of first electrodes include a first dust collection unit in which aerosol is collected,

The plurality of second electrodes include a second dust collector that forms an electric field with the first dust collector, and the second dust collector extends from the discharge portion.
According to claim 12,

An electric dust collection device in which the second dust collection unit is disposed downstream of the air flow path from the discharge unit.
According to claim 12,

An electric dust collection device in which the discharge part and the second dust collection part are formed integrally.
According to claim 1,

The electric dust collector connects the plurality of first electrodes and the plurality of second electrodes, and further includes a plurality of bending parts bent in a zigzag manner so that the plurality of first electrodes and the plurality of second electrodes face each other.