Dust collecting sheet and electric dust collecting device

Abstract

A dust collection sheet includes: a first electrode extending in a first direction from an upstream of an air flow path toward a downstream of the air flow path, and including a first electrode layer to which a first voltage is applied and a first dielectric layer covering the first electrode layer; a second electrode disposed in a second direction orthogonal to the first direction and including a second electrode layer to which a second voltage different from the first voltage is applied and a second dielectric layer covering the second electrode layer; and a third electrode arranged side by side with the second electrode in the first direction and including a third electrode layer to which a third voltage different from the second voltage is applied and a third dielectric layer covering the third electrode layer, in which the second electrode includes a discharge portion, the discharge portion includes a portion of the second electrode layer not covered by the second dielectric layer, the third electrode includes a corresponding portion facing the discharge portion, and the corresponding portion includes a portion of the third electrode layer not covered by the third dielectric layer.

Description

Technical Field

[0001] The present disclosure relates to a dust collecting sheet and an electrostatic dust collecting device. Background Art

[0002] In enclosed spaces such as houses, rooms, shopping malls, factories, offices, etc., high-concentration aerosols may cause health problems for people. Such aerosols may be generated due to smoking, cooking, cleaning, welding, grinding, etc. in the limited space.

[0003] An electrostatic dust collecting device is a device used to remove such aerosols and can be used in an air purifier or an air conditioner having an air purification function.

[0004] The electrostatic dust collecting device may include a charging unit that charges the aerosols in the air by discharging and a dust collecting unit that is composed of a high-voltage electrode and a low-voltage electrode and collects the aerosols charged by the charging unit. Summary of the Invention

[0005] Technical Problem One aspect of the present disclosure provides a dust collecting sheet and an electrostatic dust collecting device capable of charging and collecting the aerosols in the air.

[0006] One aspect of the present disclosure provides a dust collecting sheet and an electrostatic dust collecting device having a simple structure and being easy to manufacture.

[0007] One aspect of the present disclosure provides a dust collecting sheet and an electrostatic dust collecting device that are realized in a thin and light manner to improve space utilization.

[0008] The technical problems to be achieved in this specification are not limited to the above-mentioned technical problems, and those skilled in the art with ordinary knowledge in the technical field to which the present invention belongs will clearly understand other technical problems not mentioned from the following description.

[0009] Technical Solution A dust collecting sheet according to an embodiment includes: a first electrode extending along a first direction from an upstream side to a downstream side of an air flow path, and including a first electrode layer to which a first voltage is applied and a first dielectric layer covering the first electrode layer; a second electrode disposed in a second direction orthogonal to the first direction, and including a second electrode layer to which a second voltage different from the first voltage is applied and a second dielectric layer covering the second electrode layer; and a third electrode disposed side by side with the second electrode in the first direction, and including a third electrode layer to which a third voltage different from the second voltage is applied and a third dielectric layer covering the third electrode layer, wherein the second electrode includes a discharge portion including a portion of the second electrode layer not covered by the second dielectric layer, the third electrode includes a corresponding portion facing the discharge portion, and the corresponding portion includes a portion of the third electrode layer not covered by the third dielectric layer.

[0010] A dust collecting sheet according to an embodiment may include: a plurality of first electrodes extending along a first direction, and each of the plurality of first electrodes including a first electrode layer configured to receive a first voltage and a first dielectric layer covering a part of the first electrode layer; a plurality of second electrodes, each of the plurality of second electrodes including a second electrode layer configured to receive a second voltage, a second dielectric layer covering a part of the second electrode layer, and a discharge portion including a portion of the second electrode layer not covered by the second dielectric layer; and a plurality of third electrodes, each of the plurality of third electrodes including a third electrode layer configured to receive a third voltage, a third dielectric layer covering a part of the third electrode layer, and a corresponding portion including a portion of the third electrode layer not covered by the third dielectric layer, wherein each of the plurality of second electrodes may be adjacent to each of the plurality of first electrodes in the second direction, the corresponding portion of each of the plurality of third electrodes may face the discharge portion of each of the plurality of second electrodes, each of the plurality of third electrodes may be adjacent to the second electrodes among the plurality of second electrodes in the first direction, the second voltage may be different from the first voltage, the third voltage may be different from the second voltage, and the plurality of second electrodes and the plurality of third electrodes may be configured to generate a charging effect together with the discharge portion of each of the plurality of second electrodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a perspective view showing an electrostatic precipitator.

[0012] Figure 2 is a perspective view of the electrostatic precipitator disassembled.

[0013] Figure 3 It is a plan view showing the developed view of the dust collecting sheet.

[0014] Figure 4 It is a perspective view showing the state where the Figure 3 dust collecting sheet is folded.

[0015] Figure 5 It is a side sectional view of the dust collecting sheet.

[0016] Figure 6 It is a perspective view showing the state where the dust collecting sheets are stacked.

[0017] Figure 7 It is a side sectional view of the dust collecting sheet.

[0018] Figure 8 It is a side sectional view showing the process in which the aerosol is charged and captured by the dust collecting sheet when cations are released from the second electrode layer.

[0019] Figure 9 It is a side sectional view showing the process in which the aerosol is charged and captured by the dust collecting sheet when anions are released from the second electrode layer.

[0020] Figure 10 It is a side sectional view of the dust collecting sheet.

[0021] Figure 11 It is a side sectional view of the dust collecting sheet.

[0022] Figure 12 It is a plan view showing the developed view of the dust collecting sheet.

[0023] Figure 13 It is a perspective view showing the state where the Figure 12 dust collecting sheet is folded.

[0024] Figure 14 It is a side sectional view of the dust collecting sheet.

[0025] Figure 15 It is a side sectional view of the dust collecting sheet.

[0026] Figure 16 It is a side sectional view of the dust collecting sheet.

[0027] Figure 17 It is a side sectional view of the dust collecting sheet.

[0028] Figure 18 It is a side sectional view of the dust collecting sheet. Detailed implementation mode

[0029] The embodiments described in this specification and the configurations shown in the drawings are merely a preferred example of the disclosed invention. At the time of filing this application, there may be various modified examples that can replace the embodiments and drawings of this specification.

[0030] In addition, the same reference numerals or symbols marked in the respective drawings of this specification indicate components or constituent elements that substantially perform the same function.

[0031] In addition, the terms used in this specification are for explaining the embodiments and are not intended to limit and / or define the disclosed invention. Unless the context clearly indicates otherwise, singular expressions include plural expressions. In this specification, terms such as "comprising" or "having" are used to specify the existence of features, numbers, steps, operations, constituent elements, components, or combinations thereof described in the specification, and do not preclude the existence or additional possibility of one or more other features or numbers, steps, operations, constituent elements, components, or combinations thereof in advance.

[0032] In addition, ordinal terms such as "first", "second", etc. used in this specification may be used to explain various constituent elements, but the constituent elements are not limited to these terms, and these terms are only used for the purpose of distinguishing one constituent element from other constituent elements. For example, without departing from the scope of the rights of the present invention, the first constituent element may be named the second constituent element, and similarly, the second constituent element may also be named the first constituent element. The term "and / or" includes a combination of multiple related described items or one of multiple related described items.

[0033] In addition, terms such as "front", "upper", "lower", "left", and "right" used in the following description are defined based on the drawings, and the shapes and positions of the respective constituent elements are not limited by these terms.

[0034] Hereinafter, the expression "at least one of A, B, or C" refers to "only A", "only B", "only C", "both A and B", "both A and C", "both B and C", or "all of A, B, and C".

[0035] Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0036] The electric dust collector 1 is a device for removing aerosols generated by activities such as smoking, cooking, cleaning, welding, and grinding inside a predetermined space. The electric dust collector 1 can be provided inside a device (such as an air conditioner or an air purifier) that can perform an air filtration function.

[0037] An air purifier or an air conditioner may include an intake port through which external air flows in, an electrostatic precipitator 1 that filters the air flowing in through the intake port, and a blower fan that makes the air flow. The air purifier or the air conditioner may include an outlet port that discharges the air filtered by the filtering member. By the operation of the blower fan, air can flow through the intake port, the electrostatic precipitator 1, and the outlet port.

[0038] Devices such as air purifiers or air conditioners may include various filtering devices in addition to the electrostatic precipitator 1. For example, a fine dust collecting filter in the form of a non-woven fabric formed of polypropylene resin or polyethylene resin and / or a granular activated carbon filter may be selectively provided.

[0039] Figure 1 It is a perspective view showing the electrostatic precipitator. Figure 2 It is a perspective view of the electrostatic precipitator disassembled.

[0040] The electrostatic precipitator 1 may be arranged to allow air to pass through. As air passes through the electrostatic precipitator 1, aerosols in the air can be collected by the electrostatic precipitator 1.

[0041] An air flow path may be formed in the electrostatic precipitator 1, and the direction from the upstream to the downstream of the air flow path may be defined as the first direction (A→A').

[0042] In the drawings, as an example, a case where the electrostatic precipitator 1 is arranged vertically with respect to the ground is shown, so that air can flow from the front to the rear, and thus the first direction (A→A') may be the direction from the front to the rear.

[0043] However, the present disclosure is not limited thereto. In the case where the electrostatic precipitator 1 is arranged horizontally with respect to the ground, air can flow from the bottom to the top, and thus the first direction may also be the direction from the bottom to the top.

[0044] The electrostatic precipitator 1 may include dust collecting plates 10 and a frame 11 provided to support the dust collecting plates 10.

[0045] The frame 11 may be in a shape surrounding the outer contour of the dust collecting plates 10. The frame 11 may include a first frame 12 and a second frame 13. The first frame 12 and the second frame 13 may be joined. The dust collecting plates 10 may be provided between the first frame 12 and the second frame 13 and may be protected by the first frame 12 and the second frame 13.

[0046] The first frame 12, the dust collecting sheet 10, and the second frame 13 can be arranged along the first direction (A→A'). For example, when the electrostatic dust collecting device 1 is arranged vertically with respect to the ground, the first frame 12 can be provided in front of the dust collecting sheet 10, and the second frame 13 can be provided behind the dust collecting sheet 10. Air can pass through the dust collecting sheet 10 through the openings 12a and 13a formed on the inner sides of the first frame 12 and the second frame 13 respectively.

[0047] Figure 3 It is a plan view showing an expanded view of the dust collecting sheet. Figure 4 It shows Figure 3 The three-dimensional view of the state where the dust collecting sheet is folded.

[0048] The dust collecting sheet 10 can include a first sheet 23 and a second sheet 24. Electrode layers 35, 45, and 55 can be arranged between the first sheet 23 and the second sheet 24. The electrode layers 35, 45, and 55 can include a first electrode layer 35, a second electrode layer 45, and a third electrode layer 55.

[0049] On one surface of the first sheet 23 where the electrode layers 35, 45, and 55 are arranged, the second sheet 24 can be bonded. The first sheet 23 and the second sheet 24 can be attached to form a single dust collecting sheet 10.

[0050] The first sheet 23 and / or the second sheet 24 can include a polyethylene terephthalate (PET) film. However, the present disclosure is not limited thereto, and the first sheet 23 and / or the second sheet 24 can also include films made of other insulating materials.

[0051] The first sheet 23 and the second sheet 24 can correspond to Figures 6 to 8 , Figures 10 to 13 The dielectric layers 31, 41, and 51.

[0052] The electrode layers 35, 45, and 55 can include carbon thin films. However, the present disclosure is not limited thereto, and the electrode layers 35, 45, and 55 can also include conductive substances such as copper, silver, and other metal-based coatings.

[0053] The electrode layers 35, 45, and 55 can be formed by a conductive pattern printed or deposited on one surface of the first sheet 23, and can be formed by printing a conductive carbon thin film or depositing a conductive metal such as aluminum on one surface of the first sheet 23.

[0054] On one surface of the first sheet 23, power connection parts 21 and 22 can be arranged, and power can be connected to the electrode layers 35, 45, and 55 to apply a voltage. The power connection parts 21 and 22 can include a first power connection part 21 and a second power connection part 22.

[0055] The first power connection portion 21 can be connected to the second electrode layer 45, and the second power connection portion 22 can be connected to the first electrode layer 35 and / or the third electrode layer 55.

[0056] Voltages different from each other can be applied to the first power connection portion 21 and the second power connection portion 22. A high voltage can be applied to the first power connection portion 21, and a low voltage or ground can be applied to the second power connection portion 22.

[0057] The second electrode 40 can be cut so that one side thereof is open. The second electrode 40 can include a discharge portion 46 provided to expose at least a part of the second electrode layer 45 to the outside. The discharge portion 46 can be a portion of the second electrode 40 that exposes the second electrode layer 45. The discharge portion 46 can be a portion that releases ions.

[0058] The third electrode 50 can be cut so that one side thereof is open. The third electrode 50 can include a corresponding portion 56 provided to expose at least a part of the third electrode layer 55 to the outside. The corresponding portion 56 can be a portion of the third electrode 50 that exposes the third electrode layer 55. The corresponding portion 56 can be a portion that causes a charging effect with the discharge portion 46.

[0059] An empty space can be formed between the second electrode 40 and the third electrode 50. An empty space can be formed between the discharge portion 46 and the corresponding portion 56. An empty space can be formed between the discharge portion 46 and the corresponding portion 56 to cause a charging effect.

[0060] The discharge portion 46 and the corresponding portion 56 can be arranged to face each other.

[0061] The discharge portion 46 can be set such that its area becomes smaller as it gets closer to the corresponding portion 56. The discharge portion 46 can be formed in a shape that protrudes toward the corresponding portion 56.

[0062] The discharge portion 46 can be formed sharply. The discharge portion 46 can be cut into a serrated shape. The discharge portion 46 can have a shape of a triangle 48 having a vertex 47 at the point closest to the corresponding portion 56. The discharge portion 46 can include a vertex 47 that protrudes toward the corresponding portion 56.

[0063] The vertex 47 can be a region where ion release is concentrated in the discharge portion 46. Ions can be released more easily through the vertex 47.

[0064] The corresponding portion 56 can be set to be in a straight line shape. The corresponding portion 56 can be cut in a straight line along the third direction (C→C'). The corresponding portion 56 can extend in a straight line along the third direction (C→C').

[0065] By extending the corresponding part 56 in a straight line, the charging action between the discharge part 46 and the corresponding part 56 can be effectively carried out. That is, the discharge part 46 that releases ions includes a sharp vertex 47. On the contrary, the area of the corresponding part 56 is formed to be larger than the area of the discharge part 46, so that corona discharge can be induced more effectively in the discharge part 46.

[0066] Refer to Figure 4 , the dust collecting sheet 10 can be arranged in a bent manner. By bending the flat dust collecting sheet 10 composed of a single sheet into a zigzag shape, the first electrode 30, the second electrode 40, and the third electrode 50 can be vertically arranged (refer to Figure 2 ).

[0067] The dust collecting sheet 10 can be bent so that the second electrode 40 and the third electrode 50 are arranged in the same plane with each other.

[0068] The second electrode 40 and the third electrode 50 can be arranged in the same plane. The first electrode 30 can be arranged in a plane different from the second electrode 40 and / or the third electrode 50. The first electrode 30 can be arranged in a zigzag shape with the second electrode 40 and / or the third electrode 50.

[0069] Figure 5 is a side sectional view of the dust collecting sheet. Specifically, Figure 5 is shown with respect to the A reference line Figure 4 of the side sectional view of the dust collecting sheet.

[0070] The dust collecting sheet 10 can include a plurality of electrodes 30, 40, 50, and the plurality of electrodes 30, 40, 50 can extend along the first direction (A→A'). That is, air can flow through between the plurality of electrodes 30, 40, 50 that extend along the first direction (A→A') as it flows along the first direction (A→A').

[0071] The dust collecting sheet 10 can include the first electrode 30. The first electrode 30 can include a first dielectric layer 31 and a first electrode layer 35. The first electrode layer 35 can be provided inside the first dielectric layer 31.

[0072] The first dielectric layer 31 can include a first upper dielectric layer 31a arranged above with respect to the first electrode layer 35 and a first lower dielectric layer 31b arranged below. The first dielectric layer 31 can be formed by joining the first upper dielectric layer 31a and the first lower dielectric layer 31b. The first dielectric layer 31 can also be formed integrally without distinguishing between the upper and lower parts.

[0073] The dust collecting sheet 10 can include the second electrode 40. The second electrode 40 can include a second dielectric layer 41 and a second electrode layer 45. The second electrode layer 45 can be provided inside the second dielectric layer 41.

[0074] The second dielectric layer 41 may include a second upper dielectric layer 41a disposed above with reference to the second electrode layer 45 and a second lower dielectric layer 41b disposed below. The second dielectric layer 41 may be formed by joining the second upper dielectric layer 41a and the second lower dielectric layer 41b. The second dielectric layer 41 may also be formed integrally without distinguishing between the upper and lower portions.

[0075] The second electrode layer 45 may include a second electrode layer upper surface 45a and a second electrode layer lower surface 45b in the second direction (B→B'). The second electrode layer upper surface 45a may be disposed in the second upper dielectric layer 41a, and the second electrode layer lower surface 45b may be disposed in the second lower dielectric layer 41b.

[0076] The second electrode layer upper surface 45a and / or the second electrode layer lower surface 45b may be covered by the second dielectric layer 41. The second electrode layer upper surface 45a and / or the second electrode layer lower surface 45b may be disposed inside the second dielectric layer 41.

[0077] The dust collecting sheet 10 may include a third electrode 50. The third electrode 50 may include a third dielectric layer 51 and a third electrode layer 55. The third electrode layer 55 may be disposed inside the third dielectric layer 51.

[0078] The third dielectric layer 51 may include a third upper dielectric layer 51a disposed above with reference to the third electrode layer 55 and a third lower dielectric layer 51b disposed below. The third dielectric layer 51 may be formed by joining the third upper dielectric layer 51a and the third lower dielectric layer 51b. The third dielectric layer 51 may also be formed integrally without distinguishing between the upper and lower portions.

[0079] The third electrode layer 55 may include a third electrode layer upper surface 55a and a third electrode layer lower surface 55b in the second direction (B→B'). The third electrode layer upper surface 55a may be disposed in the third upper dielectric layer 51a, and the third electrode layer lower surface 55b may be disposed in the third lower dielectric layer 51b.

[0080] The third electrode layer upper surface 55a and / or the third electrode layer lower surface 55b may be covered by the third dielectric layer 51. The third electrode layer upper surface 55a and / or the third electrode layer lower surface 55b may be disposed inside the third dielectric layer 51.

[0081] The third electrode 50 may be arranged side by side with the second electrode 40 in the first direction (A→A'). The third electrode 50 may be arranged spaced apart from the second electrode 40 in the first direction (A→A'). The second electrode 40 and the third electrode 50 may be disposed on the same plane.

[0082] In addition, as described below, one end 45c of the second electrode layer 45 and the other end 55c of the third electrode layer 55 may be open. That is, an empty space may be formed between the second electrode layer 45 and the third electrode layer 55 to generate an electrification effect.

[0083] Although an empty space is formed between the second electrode layer 45 and the third electrode layer 55, the second electrode 40 and the third electrode 50 may remain connected. Specifically, referring to Figure 3 , the second electrode 40 and the third electrode 50 may be connected by the first sheet 23 and / or the second sheet 24. In Figure 5 , the dotted line shown between the second electrode 40 and the third electrode 50 indicates that the second electrode 40 and the third electrode 50 are connected to each other in portions other than the discharge portion 46 of the second electrode 40 and the corresponding portion 56 of the third electrode 50.

[0084] The first electrode 30 may be spaced apart from the second electrode 40 and / or the third electrode 50 in the second direction (B→B'). The first electrode 30 may be disposed in a plane different from the plane in which the second electrode 40 and the third electrode 50 are disposed.

[0085] The dust collecting sheet 10 may include a bent portion 15. The bent portion 15 may be provided to connect the first electrode 30 to the second electrode 40 and / or the third electrode 50. The first electrode 30 and the second electrode 40 and / or the third electrode 50 may be disposed to face each other by the bent portion 15.

[0086] The bent portion 15 may be in a bent shape to form a curved surface between the plane in which the first electrode 30 is disposed and the plane in which the second electrode 40 and / or the third electrode 50 are disposed. The bent portion 15 may be formed in a zigzag shape along the length direction of the dust collecting sheet 10 between the plurality of first electrodes 30 and the plurality of second electrodes 40 and / or the plurality of third electrodes 50.

[0087] A first voltage may be applied to the first electrode layer 35, a second voltage may be applied to the second electrode layer 45, and a third voltage may be applied to the third electrode layer 55.

[0088] The first voltage and the third voltage may be the same. The second voltage may be different from the first voltage and / or the third voltage.

[0089] The second voltage may be a voltage higher than the first voltage and / or the third voltage. The first voltage and / or the third voltage may be lower than the second voltage, or may be grounded to represent 0V.

[0090] In this drawing, as an example, a case where the first electrode 30 and the third electrode 50 are grounded and a high voltage is applied to the second electrode 40 is shown, but the present disclosure may include various circuits for applying a potential difference to the first electrode 30, the second electrode 40, and the third electrode 50.

[0091] If a voltage difference is generated between the first electrode 30 and the second electrode 40, the second electrode 40 as the high-voltage electrode can be formed as the positive (+) electrode, and the first electrode 30 as the low-voltage electrode can be formed as the negative (-) electrode. Here, the positive (+) electrode and the negative (-) electrode can be based on the potential difference between the two electrodes, with the side having a higher potential represented as the positive (+) electrode and the side having a lower potential represented as the negative (-) electrode. An electric field can be formed between the first electrode 30 and the second electrode 40.

[0092] The first electrode 30 can include a first dust collection part 39, and the second electrode 40 can include a second dust collection part 49. The first dust collection part 39 can be formed as the negative (-) electrode, and the second dust collection part 49 can be formed as the positive (+) electrode. An electric field is formed between the first dust collection part 39 and the second dust collection part 49, so that charged aerosol can be trapped by the first dust collection part 39.

[0093] The second electrode 40 can include a discharge part 46. The discharge part 46 can be a part that is open in such a way that the second electrode layer 45 provided inside the second dielectric layer 41 is exposed to the outside. The discharge part 46 can be provided to expose at least a part of the second electrode layer 45.

[0094] The discharge part 46 can include a part of the second electrode layer 45 that is not covered by the second dielectric layer 41. The second electrode 40 can include the discharge part 46, and the discharge part 46 includes a part of the second electrode layer 45 that is not covered by the second dielectric layer 41. The discharge part 46 can be the part of the second electrode layer 45 that is not covered by the second dielectric layer 41.

[0095] Specifically, if the corner formed on one side of the second electrode 40 is cut, the second dielectric layer 41 can be opened, so that a part of the second electrode layer 45 can be exposed to the outside. That is, a part of the second electrode layer 45 can be not covered by the second dielectric layer 41. The discharge part 46 can be arranged on the side surface 45c of the second electrode layer 45. The side surface 45c of the second electrode layer 45 can be the part connecting the upper surface 45a and the lower surface 45b of the second electrode layer 45.

[0096] The opened part of the second electrode layer 45 can be the discharge surface 45c. The discharge surface 45c can be the side surface of the second electrode layer 45. The discharge surface 45c can be the part that releases ions.

[0097] At this time, if a voltage is applied to the second electrode layer 45, corona discharge occurs on the second electrode layer 45 exposed to the outside, so that ions can be released to the outside.

[0098] The third electrode 50 may include a corresponding portion 56. The corresponding portion 56 may be a portion that is open in such a way that the third electrode layer 55 provided inside the third dielectric layer 51 is exposed to the outside. The corresponding portion 56 may be provided to expose at least a part of the third electrode layer 55.

[0099] The corresponding portion 56 may include a part of the third electrode layer 55 that is not covered by the third dielectric layer 51. The third electrode 40 may include the corresponding portion 56, and the corresponding portion 56 includes a part of the third electrode layer 55 that is not covered by the third dielectric layer 51. The corresponding portion 56 may be the part of the third electrode layer 55 that is not covered by the third dielectric layer 51.

[0100] Specifically, if the corner formed on one side of the third electrode 50 is cut, the third dielectric layer 51 may be opened, so that a part of the third electrode layer 55 can be exposed to the outside. That is, a part of the third electrode layer 55 may not be covered by the third dielectric layer 51. The corresponding portion 56 may be disposed on the side surface 55c of the third electrode layer 55. The side surface 55c of the third electrode layer 55 may be a part connecting the upper surface 55a and the lower surface 55b of the third electrode layer 55.

[0101] The open part of the third electrode layer 55 may be the corresponding surface 55c. The corresponding surface 55c may be the side surface of the third electrode layer 55.

[0102] At this time, since a voltage lower than that of the second electrode layer 45 is applied to the third electrode layer 55 or it is grounded, an electric field can be formed between the third electrode layer 55 and the second electrode layer 45. The corresponding surface 55c may be provided to form an electric field with the discharge surface 45c.

[0103] The ions released from the discharge portion 46 may move toward the corresponding portion 56. The aerosol in the air between the discharge portion 46 and the corresponding portion 56 may be charged by the ions. The charged aerosol may be trapped by the first dust collection portion 39 and / or the second dust collection portion 49.

[0104] The discharge portion 46 and the corresponding portion 56 may be arranged to face each other. The discharge portion 46 and the corresponding portion 56 may face each other in the first direction (A→A'). The discharge portion 46 and the corresponding portion 56 may be arranged in a straight line in the first direction (A→A').

[0105] The discharge surface 45c and the corresponding surface 55c may be arranged in parallel. The discharge surface 45c and the corresponding surface 55c may be arranged side by side in a straight line. The discharge surface 45c and the corresponding surface 55c may be arranged to face each other.

[0106] The number of the third electrodes 50 may be set to be the same as the number of the second electrodes 40. The number of the corresponding portions 56 may be set to be the same as the number of the discharge portions 46. The number of the corresponding surfaces 55c may be set to be the same as the number of the discharge surfaces 45c.

[0107] Ions released from the discharge portion 46 may move toward the corresponding portion 56 and charge the aerosol in the air.

[0108] Since the corresponding portion 56 is arranged to face the discharge portion 46, corona discharge can occur more effectively. Since the corresponding portion 56 and the discharge portion 46 are arranged in a straight line, the charging effect can be generated effectively. A strong electric field can be formed between the corresponding portion 56 and the discharge portion 46.

[0109] The dust collecting sheet 10 may include dust collecting portions 39 and 49. The dust collecting portions 39 and 49 may include a first dust collecting portion 39 provided on the first electrode 30 and a second dust collecting portion 49 provided on the second electrode 40.

[0110] The second dust collecting portion 49 may extend from the discharge portion 46. The second dust collecting portion 49 may be arranged downstream of the discharge portion 46 in the air flow path. The discharge portion 46 and the second dust collecting portion 49 may be arranged along the first direction (A→A'). The discharge portion 46 and the second dust collecting portion 49 may be formed integrally.

[0111] Figure 6 is a perspective view showing a state of stacking the dust collecting sheets. Figure 7 is a side sectional view of the dust collecting sheet.

[0112] The dust collecting sheet 10 may also be composed of a single sheet. For example, the first electrode 30 may be provided on one sheet, and the second electrode 40 and the third electrode 50 may be provided together on another sheet. The sheet provided with the first electrode 30 and the sheet provided with the second electrode 40 and / or the third electrode 50 may be stacked alternately with each other.

[0113] By separately providing the sheet provided with the first electrode 30 and the sheet provided with the second electrode 40 and / or the third electrode 50, the length of each sheet can be freely adjusted. Therefore, the length of each sheet can be adjusted according to the size, shape, arrangement of the electrostatic dust collecting device 1, and the voltage applied to the electrode layers 35, 45, 55, etc. In addition, by separately providing the sheets, the first electrode 30 and / or the second electrode 40 and / or the third electrode 50 can be arranged more freely.

[0114] In addition, referring to Figure 7 , by stacking the dust collecting sheets 10 in a single sheet, the constitution of the bent portion can be omitted. However, the present disclosure is not limited thereto.

[0115] Even if the dust collecting sheet 10 is composed of a single sheet, the electrification effect between the discharge part 46 and the corresponding part 56 can be the same as described above. The description repeated herein will be omitted.

[0116] In addition, the distance D1 between the first electrode layer 35 and the second electrode layer 45 can be set to be greater than the distance D2 between the second electrode layer 45 and the third electrode layer 55. In the second direction (B B'), the distance D1 between the first electrode layer 35 and the second electrode layer 45 can be set to be greater than the distance D2 between the side surface 45c of the second electrode layer 45 and the side surface 55c of the third electrode layer 55 in the first direction (A A'). This can be the same in the configuration including the bent part 15. Figure 5 In the above, it can be the same.

[0117] However, the present disclosure is not limited thereto. D1 can be set to be less than or equal to D2.

[0118] Figure 8 It is a side sectional view showing the process in which the aerosol is electrified and captured by the dust collecting sheet when cations are released from the second electrode layer. Figure 9 It is a side sectional view showing the process in which the aerosol is electrified and captured by the dust collecting sheet when anions are released from the second electrode layer.

[0119] Referring to Figure 8 , cations can be released from the discharge part 46 by applying a high voltage of positive (+) polarity to the second electrode 40. That is, the aerosol in the air can be electrified to the positive (+) pole by the corona discharge between the discharge part 46 and the corresponding part 56.

[0120] The electrified aerosol can move along the air flow direction to the dust collecting sheet 10 arranged downstream. Specifically, the aerosol electrified to the positive (+) pole can be captured by the first dust collecting part 39 of the first electrode 30 of the negative (-) pole. Therefore, the air passing through the dust collecting sheet 10 can be discharged in a clean state after removing the aerosol.

[0121] At this time, since the corresponding part 56 is arranged upstream of the discharge part 46 in the air flow path, the ions released from the discharge part 46 move in the direction opposite to the air flow direction. That is, the ions move in the reverse direction of the air flow direction and electrify the aerosol.

[0122] When the electrified aerosol is captured by the corresponding part 56, the electrification performance may decrease. However, in the present disclosure, since the corresponding part 56 is arranged upstream of the discharge part 46, it is possible to prevent the electrified aerosol from being captured by the corresponding part 56. This is because the electrified aerosol needs to move in the reverse direction of the air flow direction in order to move toward the corresponding part 56. Therefore, the electrification performance and efficiency of the dust collecting sheet 10 can be improved.

[0123] Reference Figure 9 Alternatively, by applying a high voltage of negative (-) polarity to the second electrode 40, the discharge part 46 releases negative ions. That is, through the corona discharge of the discharge electrodes 30, 40, 50 and the corresponding electrodes 30, 40, 50, the aerosol in the air can be charged negatively (-).

[0124] The aerosol charged negatively (-) can be captured by the first dust collecting part 39 of the first electrode 30 of positive (+) polarity. Hereinafter, the description of Figure 8 repetition is omitted.

[0125] In addition, although Figure 8 and Figure 9 show an example where the dust collecting sheets are bent and stacked, the present disclosure is not limited thereto. That is, as Figure 5 and Figure 6 shown, in the case where the dust collecting sheets are formed of individual sheets and stacked, the process in which the second electrode layer releases ions to charge the aerosol and the aerosol is captured by the dust collecting sheets is the same.

[0126] Figure 10 is a side sectional view of the dust collecting sheet. Figure 11 is a side sectional view of the dust collecting sheet.

[0127] The third electrode 50 can be arranged at a distance from the first electrode 30 and / or the second electrode 40 in the first direction (A→A'). The third electrode 50 can be arranged upstream of the first electrode 30 and / or the second electrode 40.

[0128] The first electrode 30 can include a first end (i.e., the first end portion) 30a of the first electrode arranged upstream and a second end (i.e., the second end portion) 30b of the first electrode arranged downstream.

[0129] The third electrode 50 can include a first end (i.e., the first end portion) 50a of the third electrode arranged upstream and a second end (i.e., the second end portion) 50b of the third electrode arranged downstream. The second electrode 40 can include a first end 40a of the second electrode arranged upstream and a second end 40b of the second electrode arranged downstream. The second end 50b of the third electrode and the upper end 40a of the second electrode can be arranged facing each other.

[0130] In the first direction, the length from the first end 50a of the third electrode to the second end 40b of the second electrode can be set to be greater than the length from the first end 50a of the first electrode to the second end 50b of the first electrode.

[0131] By forming a relatively large separation space between the second end 50b of the third electrode and the first end 40a of the second electrode, the distance between the discharge part 46 and the corresponding part 56 can be increased. Thereby, a charged space is formed relatively large, so that the aerosol in a wider area can be charged.

[0132] Figure 10 As an example, the manner in which the dust collecting sheet 10 is bent is shown, but the present disclosure is not limited thereto.

[0133] For example, referring to Figure 11 , the dust collecting sheet 10 may be formed in a single sheet and bent, or may be formed of individual sheets and stacked.

[0134] In addition, the distance D1 between the first electrode layer 35 and the second electrode layer 45 may be set to be less than the distance D2 between the second electrode layer 45 and the third electrode layer 55. The distance between the first electrode layer 35 and the second electrode layer 45 in the second direction (B B') may be less than the distance D2 between the side surface 45c of the second electrode layer 45 and the side surface 55c of the third electrode layer 55 in the first direction (A A'). This may also be the same in the configuration including the bent portion 15. Figure 10 This may also be the same in the configuration including the bent portion 15.

[0135] However, the present disclosure is not limited thereto. D1 may be greater than or equal to D2. Figure 12 It is a plan view showing an unfolded view of the dust collecting sheet. Figure 13 It is showing Figure 12 a perspective view of the state in which the dust collecting sheet is folded. Figure 14 It is a side sectional view of the dust collecting sheet. Figure 15 It is a side sectional view of the dust collecting sheet. Figure 16 It is a side sectional view of the dust collecting sheet.

[0136] Referring to Figure 12 and Figure 13 , the dust collecting sheet 10 may be bent such that the first electrode 30 and the third electrode 50 are arranged in the same plane as each other.

[0137] The first electrode 30 and the third electrode 50 may be arranged in the same plane. The second electrode 40 may be arranged in a plane different from the first electrode 30 and / or the third electrode 50. The second electrode 40 may be arranged in a zigzag pattern with the first electrode 30 and / or the third electrode 50.

[0138] In addition, the dust collecting sheet 10 may also be formed of a single sheet. For example, the second electrode 40 may be provided on one sheet, and the first electrode 30 and the third electrode 50 may be provided together on another sheet. The sheet provided with the second electrode 40 and the sheet provided with the first electrode 30 and / or the third electrode 50 may be stacked alternately with each other.

[0139] Referring to Figure 14, the third electrode 50 may be arranged side by side with the first electrode 30 in the first direction (A→A'). The third electrode 50 may be arranged spaced apart from the first electrode 30 in the first direction (A→A').

[0140] The third electrode 50 may be arranged spaced apart from the second electrode 40 in the second direction (B→B').

[0141] The corresponding part 56 may be arranged spaced apart from the discharge part 46 in the second direction (B→B'). The corresponding surface 55c may be arranged spaced apart from the discharge surface 45c in the second direction (B→B').

[0142] The corresponding part 56 may be arranged above and / or below the discharge part 46. The corresponding part 56 may be arranged in the diagonal direction of the discharge part 46.

[0143] Ions released from the discharge part 46 may move toward the corresponding part 56. At this time, since the corresponding part 56 is arranged spaced apart from the discharge part 46 in the second direction (B→B'), the ions may move in the second direction (B→B'). Therefore, the ions may diffuse into a wider space.

[0144] That is, as the ions released from the discharge part 46 move upward and / or downward of the discharge part 46, the aerosol in the air in a wider area can be charged. In addition, since the discharge part 46 is spaced apart from the corresponding part 56, generation of sparks can be prevented.

[0145] In addition, Figure 14 As an example, the way the dust collecting sheet 10 is bent is shown, but the present disclosure is not limited thereto.

[0146] For example, referring to Figure 15 and Figure 16 , the dust collecting sheet 10 may be made in a form that is composed of a single sheet and bent, or may be made in a form that is composed of individual sheets and stacked.

[0147] In addition, referring to Figure 15 , the distance D1 between the first electrode layer 35 and the second electrode layer 45 may be set to be greater than the distance D2 between the second electrode 40 and the third electrode 50. The distance D1 between the first electrode layer 35 and the second electrode layer 45 in the second direction (B B') may be set to be greater than the distance D2 between the second electrode 40 and the third electrode 50 in the first direction (A A'). This may also be the same in the configuration including the bent part. Figure 14 This may also be the same.

[0148] However, the present disclosure is not limited thereto. For example, referring to Figure 16 , D1 may also be set to be less than D2. Or, D1 and D2 may also be set to be the same.Figure 17 It is a side sectional view of the dust collecting sheet. Figure 18 It is a side sectional view of the dust collecting sheet.

[0149] In the dust collecting sheet 10, in addition to the manner of arranging the electrode layers 35, 45, and 55 inside the dielectric layers 31, 41, and 51, the electrode layers 35, 45, and 55 can also be arranged to be exposed outside the dielectric layers 31, 41, and 51.

[0150] For example, in addition to the three-layer form of arranging the electrode layer between the lower dielectric layer and the upper dielectric layer, it can also be made into a two-layer form of the dielectric layer and the electrode layer.

[0151] Refer to Figure 17 , the second electrode 40 can include a second dielectric layer 41 and a second electrode layer 45 arranged on the upper part of the second dielectric layer 41. The second electrode layer 45 can be arranged so that its upper surface is exposed to the outside. The discharge part 46 can be the upper surface of the second electrode layer 45. The discharge part 46 can extend along the first direction (A→A').

[0152] The third electrode 50 can include a third dielectric layer 51 and a third electrode layer 55 arranged on the upper part of the third dielectric layer 51. The third electrode layer 55 can be arranged so that its upper surface is exposed to the outside. The corresponding part 56 can be the upper surface of the third electrode layer 55. The corresponding part 56 can extend along the first direction (A→A').

[0153] As the area of the discharge part 46 and / or the corresponding part 56 increases, the discharge current and the ion generation amount can increase.

[0154] Refer to Figure 18 , in addition to the form of arranging the electrode layer between the lower dielectric layer and the upper dielectric layer, the dust collecting sheet 10 can also be made into a form of arranging the dielectric layer between the upper electrode layer and the lower electrode layer.

[0155] The first electrode 30 can include a first upper electrode layer 35a, a first lower electrode layer 35b, and a first dielectric layer 31 arranged between the first upper electrode layer 35a and the first lower electrode layer 35b.

[0156] The second electrode 40 can include a second upper electrode layer 45a, a second lower electrode layer 45b, and a second dielectric layer 41 arranged between the second upper electrode layer 45a and the second lower electrode layer 45b. The upper surface 46a of the second upper electrode layer 45a and the lower surface 46b of the second lower electrode layer 45b can be exposed to the outside. The discharge part 46 can be formed on the upper surface 46a of the second upper electrode layer 45a and / or the lower surface 46b of the second lower electrode layer 45b.

[0157] The third electrode 50 may include a third upper electrode layer 55a, a third lower electrode layer 55b, and a third dielectric layer 51 disposed between the third upper electrode layer 55a and the third lower electrode layer 55b. The upper surface 56a of the third upper electrode layer 55a and the lower surface 56b of the third lower electrode layer 55b may be exposed to the outside. A corresponding portion 56 may be formed on the upper surface 56a of the third upper electrode layer 55a and / or the lower surface 56b of the third lower electrode layer 55b.

[0158] As the area of the discharge portion 46 and / or the corresponding portion 56 increases, the discharge current and the amount of ion generation may increase.

[0159] The dust collecting sheet 10 according to an embodiment of the present disclosure may include: a first electrode 30 extending along a first direction (A→A') from the upstream to the downstream of the air flow path, and including a first electrode layer 35 to which a first voltage is applied and a first dielectric layer 31 covering the first electrode layer 35; a second electrode 40 disposed relative to the first electrode in a second direction (B→B') orthogonal to the first direction (A→A'), and including a second electrode layer 45 to which a second voltage different from the first voltage is applied and a second dielectric layer 41 covering the second electrode layer 45; and a third electrode 50 arranged side by side with the second electrode 40 in the first direction (A→A'), and including a third electrode layer 55 to which a third voltage different from the second voltage is applied and a third dielectric layer 51 covering the third electrode layer 55, wherein the second electrode 40 may include a discharge portion 46 provided to expose the second electrode layer 45 to the outside of the second dielectric layer 41, and the third electrode 50 may include a corresponding portion 56 arranged to expose the third electrode layer 55 to the outside to have an electrified action with the discharge portion 46 and face the discharge portion 46 in the first direction (A→A'). According to the present disclosure, the dust collecting sheet 10 can simultaneously perform the functions of charging and collecting aerosols in the air. Therefore, the manufacturing cost can be reduced, and the space utilization rate can be improved. In addition, since the discharge portion 46 and the corresponding portion 56 are arranged to face each other, corona discharge occurs more effectively, and thus it is easier to charge the aerosol.

[0160] The discharge portion 46 and the corresponding portion 56 may be arranged in a straight line in the first direction (A→A') in which the second electrode 40 and the third electrode 50 extend. According to the present disclosure, since the discharge portion 46 and the corresponding portion 56 are arranged in a straight line in the first direction (A→A'), an electric field between the discharge portion 46 and the corresponding portion 56 is strongly formed, and thus it is easier to charge the aerosol.

[0161] The second electrode 40 and the third electrode 50 may be arranged in the same plane in the first direction (A→A'). According to the present disclosure, since the second electrode 40 and the third electrode 50 are arranged adjacent to each other, an electric field is strongly formed between the discharge portion 46 of the second electrode 40 and the corresponding portion 56 of the third electrode 50, thereby facilitating the charging of the aerosol.

[0162] The third electrode 50 may be arranged spaced apart from the second electrode 40 in a direction opposite to the first direction (A→A') to form a charging space between the discharge portion 46 and the corresponding portion 56 in the first direction (A→A'). According to the present disclosure, in the charging space, the aerosol in the air can be charged. In addition, since the corresponding portion 56 is arranged upstream of the discharge portion 46, it is possible to prevent the ions released from the discharge portion 46 from being excessively trapped by the corresponding portion 56, resulting in a decrease in the voltage difference between the discharge portion 46 and the corresponding portion 56.

[0163] The second electrode 40 may include a second electrode first end 40a and a second electrode second end 40b arranged downstream of the second electrode first end 40a in the first direction (A→A'), and the third electrode 50 may include a third electrode first end 50a and a third electrode second end 50b arranged downstream of the third electrode first end 50a in the first direction (A→A'), wherein the discharge portion 46 may be arranged at the second electrode first end 40a, and the corresponding portion 56 may be arranged at the third electrode second end 50b. According to the present disclosure, the discharge portion 46 and the corresponding portion 56 may be arranged at the corners of the electrodes to easily induce the generation of corona discharge.

[0164] The first electrode 30 may include a first electrode first end 30a and a first electrode second end 30b arranged downstream of the first electrode first end 30a in the first direction (A→A'), and in the first direction (A→A'), the length from the third electrode first end 50a to the second electrode second end 40b may be set to be greater than the length from the first electrode first end 30a to the first electrode second end 30b. According to the present disclosure, by setting the interval space between the third electrode 50 and the second electrode 40 to be larger, the charging space can be ensured to be larger.

[0165] In the second direction (B→B'), the upper surface 45a and the lower surface 45b of the second electrode layer 45 may be arranged inside the second dielectric layer 41. In the second direction (B→B'), the upper surface 55a and the lower surface 55b of the third electrode layer 55 may be disposed inside the third dielectric layer 51. The discharge portion 46 may be formed on a side surface 45c connecting the upper surface 45a and the lower surface 45b of the second electrode layer 45, and the corresponding portion 56 may be formed on a side surface 55c connecting the upper surface 55a and the lower surface 55b of the third electrode layer 55. According to the present disclosure, the discharge portion 46 and the corresponding portion 56 may be disposed at the corners of the electrode to easily induce the generation of corona discharge.

[0166] The discharge portion 46 may be configured such that the area in the third direction C→C' orthogonal to the first direction (A→A') and the second direction (B→B') becomes smaller as it approaches the corresponding portion 56. According to the present disclosure, the discharge portion 46 has a shape that protrudes toward the corresponding portion 56, so that a region where corona discharge is concentrated can be provided.

[0167] The discharge portion 46 may include a triangular shape having a vertex 47 at a point closest to the corresponding portion 56 in the first direction (A→A'). According to the present disclosure, by causing corona discharge to occur concentratedly at the vertex 47, the charging effect can be effectively induced.

[0168] The corresponding portion 56 may extend in a straight line along the third direction C→C' orthogonal to the first direction (A→A') and the second direction (B→B'). According to the present disclosure, by making it difficult for ions to be released from the corresponding portion 56, ions can be induced to be released relatively easily from the discharge portion 46. Therefore, the charging effect between the discharge portion 46 and the corresponding portion 56 can be effectively induced.

[0169] The first electrode 30 may include a first dust collection portion 39 for collecting aerosol, the second electrode 40 may include a second dust collection portion 49 that forms an electric field with the first dust collection portion 39, and the second dust collection portion 49 may extend from the discharge portion 46. The discharge portion 46 and the second dust collection portion 49 may be formed integrally. According to the present disclosure, the dust collection sheet 10 includes both the discharge portion 46 and the dust collection portions 39 and 49, so that the charging and trapping of aerosol can be performed simultaneously.

[0170] The number of the third electrodes 50 may be set to be the same as the number of the second electrodes 40. According to the present disclosure, the number of the discharge portions 46 and the corresponding portions 56 is set to be the same, so that the charging effect can be effectively generated.

[0171] According to one embodiment of the present disclosure, a dust collecting sheet 10, which is configured to trap aerosols in the air, may include: a first electrode 30, including a first dielectric layer 31 and a first electrode layer 35 inside the first dielectric layer 31, which is applied with a first voltage to collect aerosols; a second electrode 40, arranged alternately with the first electrode 30, including a second dielectric layer 41 and a second electrode layer 45 inside the second dielectric layer 41, which is applied with a second voltage higher than the first voltage to form an electric field with the first electrode 30; a third electrode 50, arranged spaced apart from the second electrode 40, including a third dielectric layer 51 and a third electrode layer 55 inside the third dielectric layer 51, which is applied with the first voltage; a discharge surface 45c, formed on the second electrode 40 and configured to expose the second electrode layer 45 to release ions; and a corresponding surface 55c, formed on the third electrode 50, exposing the third electrode layer 55 and arranged parallel to the discharge surface 45c. According to the present disclosure, the dust collecting sheet 10 can simultaneously perform the functions of charging and trapping aerosols in the air. Therefore, the manufacturing cost can be reduced, and the space utilization rate can be improved. In addition, since the discharge surface 45c and the corresponding surface 55c are arranged in parallel, corona discharge occurs more effectively, and thus it becomes easier to charge the aerosols.

[0172] The second electrode 40 and the third electrode 50 may extend in a direction (A→A') from the upstream to the downstream of the air flow path, and the corresponding surface 55c may be arranged upstream of the discharge surface 45c in the direction (A→A'). According to the present disclosure, since the corresponding surface 55c is arranged upstream of the discharge surface 45c, it is possible to prevent a phenomenon in which the voltage difference between the discharge surface 45c and the corresponding surface 55c decreases due to excessive trapping of ions released from the discharge surface 45c by the corresponding surface 55c.

[0173] The second electrode 40 may include a second electrode end 40a in the direction (A→A') and a second electrode end 40b arranged downstream of the second electrode end 40a, and the discharge surface 45c may be arranged at the second electrode end 40a. The third electrode 50 may include a third electrode end 50a in the direction (A→A') and a third electrode end 50b arranged downstream of the third electrode end 50a, and the corresponding surface 55c may be arranged at the third electrode end 50b. According to the present disclosure, the discharge surface 45c and the corresponding surface 55c may be arranged at the corners of the electrodes, so that corona discharge can be induced to occur easily.

[0174] The number of the corresponding surfaces 55c may be set to be the same as the number of the discharge surfaces 45c. According to the present disclosure, the charging effect can be effectively generated.

[0175] An electrostatic precipitator 1 according to an embodiment of the present disclosure may include: a first electrode 30 extending along a first direction (A→A') from the upstream to the downstream of the air flow path, including a first dielectric layer 31 and a first electrode layer 35 disposed inside the first dielectric layer 31 and grounded; a second electrode 40 disposed relative to the first electrode 30 in a second direction (B→B') orthogonal to the first direction (A→A'), including a second dielectric layer 41 and a second electrode layer 45 disposed inside the second dielectric layer 41 and to which a voltage is applied; and a third electrode 50 disposed relative to the second electrode 40 in the opposite direction of the first direction (A→A'), including a third dielectric layer 51 and a third electrode layer 55 disposed inside the third dielectric layer 51 and grounded, wherein the second electrode 40 may include a discharge portion 46 provided to open the second electrode layer 45 in the opposite direction of the first direction (A→A'), and the third electrode 50 may include a corresponding portion 56 provided to open the third electrode layer 55 in the first direction (A→A') to generate an electrification effect with the discharge portion 46. According to the present disclosure, the structure of the electrostatic precipitator 1 can be simplified, the manufacturing cost can be reduced, and the space utilization rate can be improved. In addition, since the discharge portion 46 opens upstream of the air flow path and the corresponding portion 56 opens downstream, it is possible to prevent a phenomenon in which the voltage difference between the discharge portion 46 and the corresponding portion 56 is reduced due to excessive trapping of ions released from the discharge portion 46 by the corresponding portion 56.

[0176] According to the concept of the present disclosure, the dust collecting sheet and the electrostatic precipitator can simultaneously perform the functions of charging the aerosol in the air and collecting it.

[0177] According to the concept of the present disclosure, the structure of the dust collecting sheet and the electrostatic precipitator can be simplified, and the manufacturing convenience can be improved.

[0178] According to the concept of the present disclosure, the dust collecting sheet and the electrostatic precipitator can be realized in a thin and light manner, thereby improving the space utilization rate.

[0179] As described above, specific embodiments have been illustrated and described. However, the present invention is not limited to the above embodiments, and those with ordinary knowledge in the technical field to which the present invention pertains can make various changes without departing from the gist of the technical concept of the present invention described in the claims.

Claims

1. A dust collecting sheet, comprising: A first electrode extending along a first direction from an upstream of an air flow path toward a downstream of the air flow path, and including a first electrode layer to which a first voltage is applied and a first dielectric layer covering the first electrode layer; A second electrode arranged in a second direction orthogonal to the first direction, and including a second electrode layer to which a second voltage different from the first voltage is applied and a second dielectric layer covering the second electrode layer; And A third electrode arranged side by side with the second electrode in the first direction, and including a third electrode layer to which a third voltage different from the second voltage is applied and a third dielectric layer covering the third electrode layer, wherein the second electrode includes a discharge portion, and the discharge portion includes a part of the second electrode layer not covered by the second dielectric layer, the third electrode includes a corresponding portion facing the discharge portion, and the corresponding portion includes a part of the third electrode layer not covered by the third dielectric layer.

2. The dust collecting sheet according to claim 1, wherein the discharge portion and the corresponding portion are arranged in a straight line in the first direction.

3. The dust collecting sheet according to claim 2, wherein the second electrode and the third electrode are arranged on the same plane.

4. The dust collecting sheet according to claim 1, wherein the third electrode is spaced apart from the second electrode in a direction opposite to the first direction to form a charged space between the discharge portion and the corresponding portion.

5. The dust collecting sheet according to claim 4, wherein the second electrode includes a first end portion and a second end portion, and a first end portion of the second electrode is located relatively upstream of a second end portion of the second electrode along the first direction, the third electrode includes a first end portion and a second end portion, and a second end portion of the third electrode is located relatively downstream of a first end portion of the third electrode along the first direction, the discharge portion is located at the first end portion of the second electrode, and the corresponding portion is located at the second end portion of the third electrode.

6. The dust collecting sheet according to claim 5, wherein the first electrode includes a first end portion and a second end portion, and a second end portion of the first electrode is located relatively downstream of a first end portion of the first electrode along the first direction, along the first direction, a length from the first end portion of the third electrode to the second end portion of the second electrode is greater than a length from the first end portion of the first electrode to the second end portion of the first electrode.

7. The dust collecting sheet according to claim 5, wherein in the second direction, an upper surface and a lower surface of the second electrode layer are inside the second dielectric layer on opposite sides of the second electrode, in the second direction, an upper surface and a lower surface of the third electrode layer are arranged inside the third dielectric layer on opposite sides of the third electrode.

8. The dust collecting sheet according to claim 7, wherein the discharge portion is formed on a side surface of the second electrode connecting the upper surface and the lower surface of the second electrode layer, the corresponding portion is formed on a side surface of the third electrode connecting the upper surface and the lower surface of the third electrode layer.

9. The dust collecting sheet according to claim 1, wherein, the area of the discharge part in a third direction orthogonal to the first direction and the second direction decreases as the distance between the discharge part and the corresponding part decreases.

10. The dust collecting sheet according to claim 9, wherein, the discharge part has a triangular shape with a point closest to the corresponding part along the first direction as a vertex.

11. The dust collecting sheet according to claim 1, wherein, the corresponding part extends in a straight line along a third direction orthogonal to the first direction and the second direction.

12. The dust collecting sheet according to claim 1, wherein, the first electrode includes a first dust collecting part provided to collect aerosol, the second electrode includes a second dust collecting part provided to form an electric field with the first dust collecting part, and the second dust collecting part extends from the discharge part.

13. The dust collecting sheet according to claim 12, wherein, the discharge part and the second dust collecting part are formed integrally.

14. The dust collecting sheet according to claim 1, comprising: at least one or more second electrodes, including the second electrode; and at least one or more third electrodes, including the third electrode, wherein the number of the at least one third electrode is the same as the number of the at least one second electrode.

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