Electrical dust collector and air purification system for subway station using the same

Abstract

In an electric dust collector and an air cleaning system of a subway station using the same, the electric dust collector collects fine charged particles by charging contaminated air and includes a dust collecting part, a high-pressure gas injection part, and a suction part. The dust collecting part collects fine charged particles by electrostatic force. The high-pressure gas injection part injects high-pressure gas toward the fine charged particles accumulated in the dust collecting part from one side of the dust collecting part. The suction part suctions the fine particles separated from the dust collecting part by the high-pressure gas injection part from the other side of the dust collecting part.

Description

TECHNICAL FIELD

[0001] The disclosure of the present invention relates to an electrostatic dust collector and an air purification system of a subway station using the same, and more particularly, the disclosure of the present invention relates to an electrostatic dust collector and an air purification system of a subway station using the same, which is capable of easily removing fine particles collected in a dust collecting plate for a large-capacity electrostatic dust collector for purifying contaminated air within a subway station. BACKGROUND

[0002] In recent years, as the problem of air pollution such as fine dust has been greatly highlighted, a household air purifier (air cleaner) has been widely supplied. In addition to the household or personal air purifier, a large-capacity air purification system is also installed in public places such as a subway station where air is easily contaminated.

[0003] At present, the air purification system of the subway station adopts a method of filtering dust or harmful substances using a filter, but in a subway station having a high pollution level, a large-capacity filter is contaminated in a very short period of time, causing a problem of deterioration of the filtering performance and reduction of the air purification efficiency. In addition, there is a problem that the filter replacement is very expensive.

[0004] Therefore, it is possible to remove dust or harmful substances by an electrostatic dust collection method (rather than a filter method), but when a large-capacity electrostatic dust collector is used, there is a risk of fire due to the need to apply a high voltage.

[0005] Therefore, the demand for an electrostatic dust collector having low maintenance costs and a safe method or an air purification system within a subway station applying the electrostatic dust collector is increasing.

[0006] Related prior arts are Korean Published Patent No. 10-2011-0014076 and Korean Patent No. 10-1577567. SUMMARY

[0007] TECHNICAL PROBLEM

[0008] The present invention aims to provide an electrostatic dust collector capable of easily removing fine particles collected in a dust collecting plate by injecting high-pressure gas from one side of a dust collecting portion to separate the fine particles from a dust collecting plate and sucking the separated fine particles at the opposite side, in order to solve the above-mentioned problems of the related art.

[0009] In addition, another object of the present invention is to provide an air purification system of a subway station using the electrostatic dust collector.

[0010] TECHNICAL SOLUTION

[0011] An electrostatic precipitator according to an embodiment for achieving the above object of the present application collects fine charged particles by charging contaminated air and includes a dust collecting portion, a high-pressure gas injection portion, and a suction portion. The dust collecting portion collects fine charged particles by electrostatic force. The high-pressure gas injection portion injects high-pressure gas toward fine charged particles accumulated in the dust collecting portion from one side of the dust collecting portion. The suction portion suctions fine particles separated from the dust collecting portion by the high-pressure gas injection portion from the other side of the dust collecting portion.

[0012] In an embodiment, the high-pressure gas injection portion can include an injection nozzle capable of adjusting an angle and injecting high-pressure gas, the suction portion can include a hopper, and the injection nozzle and the hopper can be respectively moved to positions opposite to each other.

[0013] In an embodiment, the dust collecting portion can include a plurality of dust collecting plates arranged in parallel, and a potential difference can be generated between adjacent dust collecting plates, the high-pressure gas injection portion can be provided at one side of the dust collecting portion for introducing fine particles, and the suction portion can be provided at the other side of the dust collecting portion to be opposite to the high-pressure gas injection portion.

[0014] In an embodiment, the dust collecting plate can include a first dust collecting plate to which a high voltage is applied, and a second dust collecting plate to collect fine charged particles by electrostatic force generated by the potential difference with the first dust collecting plate, and an edge of the first dust collecting plate is formed with at least one discharge fin.

[0015] In an embodiment, the electrostatic precipitator can further include a charging portion provided at a front side of the dust collecting portion and including an ion generator having carbon fibers and a voltage applying device to apply a high voltage to the carbon fibers, the high-pressure gas injection portion can be provided between the charging portion and the dust collecting portion, and can inject high-pressure gas toward the charging portion to remove fine particles accumulated on the carbon fibers.

[0016] In an embodiment, the ion generator can be a plurality, and the plurality of ion generators can be provided at at least one fixed bar spaced apart from each other, and the fixed bar can be rotated so that the ion generators are directed toward a direction in which contaminated air is introduced when fine particles are charged. The fixed bar can be rotated so that the ion generators are directed toward the high-pressure gas injection portion when fine particles accumulated on the carbon fibers are removed.

[0017] In an embodiment, the dust collecting part can include a plurality of first dust collecting plates to which a high voltage is applied and which are arranged to be spaced apart from each other in parallel, and a first electric connection part at one end of the plurality of first dust collecting plates to which an electric connection is made, a plurality of second dust collecting plates arranged between the first dust collecting plates to generate a potential difference with the adjacent first dust collecting plates, and a second electric connection part at one end of the plurality of second dust collecting plates to which an electric connection is made, a chamber to accommodate the first and second dust collecting plates inside and having an inlet for introducing air, and a barrier plate to separate a dust collecting space for collecting air introduced from the inlet in the chamber and an electric connection space in which the first and second dust collecting plates are electrically connected.

[0018] In an embodiment, the chamber can include a first chamber forming an electric connection space, one side of which is open, and a second chamber forming a dust collecting space and combined with the first chamber, one side of which is open, and the barrier plate can be disposed between the first chamber and the second chamber.

[0019] In an embodiment, the first and second electric connection parts can be disposed in the electric connection space, and the electric dust collector can further include a positive pressure forming part to supply gas to the electric connection space to form a pressure.

[0020] In an embodiment, the first dust collecting plate includes a first main plate part disposed in the dust collecting space and a distal end of the first main plate part connected to the first electric connection part, the second dust collecting plate includes a second main plate part disposed in the dust collecting space and a distal end of the second main plate part connected to the second electric connection part, the first electric connection part can extend from one side of one end of the first main plate part, the width of the first electric connection part being smaller than the width of the first main plate part, and the second electric connection part can extend from the other side of one end of the second main plate part, the width of the second electric connection part being smaller than the width of the second main plate part.

[0021] In an embodiment, the electric dust collector can further include a first fixing part disposed at one side inside the electric connection space and having a plurality of fixing slots spaced apart from each other, the first electric connection part being inserted into the fixing slots to electrically connect the first dust collecting plate, and a second fixing part disposed at the other side inside the electric connection space and having a plurality of fixing slots spaced apart from each other, the second electric connection part being inserted into the fixing slots to electrically connect the second dust collecting plate.

[0022] In an embodiment, the electrostatic dust collector can further include a first fixing rod fixed through the chamber to fix the plurality of first dust collecting plates, and a second fixing rod fixed through the chamber to fix the plurality of second dust collecting plates, a fixing hole or a fixing groove fixed to the first fixing rod can be formed at the first dust collecting plates, and a fixing hole or a fixing groove fixed to the second fixing rod can be formed at the second dust collecting plates.

[0023] In an embodiment, each of the first fixing rod and the second fixing rod can be formed as at least one or more. A high voltage can be applied to the plurality of first dust collecting plates through a high voltage application part connected to one of the first fixing rods. One of the second fixing rods can be grounded to ground the plurality of second dust collecting plates.

[0024] In an embodiment, each of the first dust collecting plates and the second dust collecting plates can have a thin film layer of a plastic material and a coating layer having carbon coated on the thin film layer.

[0025] In an embodiment, each of the first dust collecting plates and the second dust collecting plates can have a thin film layer of a plastic material, a first coating layer having carbon coated on the thin film layer, and a second coating layer having a plastic coated on the first coating layer. A portion of the first coating layer can be exposed to the outside without being coated by the second coating layer.

[0026] In an embodiment, an edge of the first coating layer exposed to the outside without being coated by the second coating layer can be coated with an insulating material.

[0027] In an embodiment, a flow rate of the gas sprayed from the high pressure gas spraying part can be 250 m / s or more.

[0028] An air purification system of a subway station according to another object to achieve the present application includes an air supply part that sucks outside air on the ground into the underground, an electrostatic dust collector that receives contaminated air in the underground space and the outside air sucked from the air supply part and purifies the contaminated air and the outside air, and an exhaust part that exhausts air in the underground space to the outside. In this case, the electrostatic dust collector includes a dust collecting part that collects charged fine particles by electrostatic force, a high pressure gas spraying part that sprays high pressure gas toward the charged fine particles accumulated in the dust collecting part from one side of the dust collecting part, and a suction part that suctions the fine particles separated from the dust collecting part by the high pressure gas spraying part from the other side of the dust collecting part.

[0029] In an embodiment, the air purification system can further include an air supply damper, a recirculation damper, and an exhaust damper. The air supply damper can be configured at the air supply portion and control the flow of air flowing into the electric dust collector, the recirculation damper can be configured at the recirculation duct connecting the underground space and the electric dust collector and control the flow of air flowing into the electric dust collector, and the exhaust damper can be configured at the exhaust portion and control the flow of air in the underground space exhausted to the outside.

[0030] In an embodiment, the electric dust collector can further include a charging portion that charges the fine particles, and the charging portion can be disposed at at least one of a front side of the dust collecting portion inside the electric dust collector, the air supply portion, an inside of the recirculation duct connecting the underground space and the electric dust collector, or an entrance of the underground space to which the recirculation duct is connected.

[0031] Inventive Effects

[0032] The electric dust collector according to an embodiment of the present application collects fine particles using an electric collection method (without using a filter), and thus can reduce the cost of filter replacement and easily and inexpensively remove the fine particles collected in the dust collecting plate using the high-pressure gas injection portion and the suction portion.

[0033] In addition, the charging portion is dispersed to the entire system, and thus the voltage applied to the charging portion can be reduced. Thus, the generation of ozone can be reduced and the risk of fire can be reduced.

[0034] In addition, the dust collecting plate is configured by coating carbon on a flexible plastic film layer, and thus the dust collecting plate can be configured to be lighter and cheaper.

[0035] In addition, the high-pressure gas injection portion that removes the fine dust collected to the dust collecting portion is also used to remove the fine dust accumulated on the carbon fiber of the charging portion.

[0036] In addition, the collection space in which collection is achieved inside the chamber that accommodates the dust and the electric connection space to which the dust collecting plate is electrically connected are separated by the blocking plate, and thus a fire caused by contamination of the fine dust at a portion electrically connected to the dust collecting plate can be prevented.

[0037] In addition, the first dust collecting plate to which a high voltage is applied and the second dust collecting plate that is grounded are electrically connected to one side inside the chamber, and thus the space efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a schematic view illustrating an electric dust collector according to an example embodiment of the present application.

[0039] Figure 2 FIG. 2 is a perspective view illustrating a charging portion of FIG. 1. Figure 1

[0040] In addition, the charging portion is dispersed to the entire system, and thus the voltage applied to the charging portion can be reduced. Thus, the generation of ozone can be reduced and the risk of fire can be reduced.

[0034] In addition, the dust collecting plate is configured by coating carbon on a flexible plastic film layer, and thus the dust collecting plate can be configured to be lighter and cheaper.

[0035] In addition, the high-pressure gas injection portion that removes the fine dust collected to the dust collecting portion is also used to remove the fine dust accumulated on the carbon fiber of the charging portion.

[0036] In addition, the collection space in which collection is achieved inside the chamber that accommodates the dust and the electric connection space to which the dust collecting plate is electrically connected are separated by the blocking plate, and thus a fire caused by contamination of the fine dust at a portion electrically connected to the dust collecting plate can be prevented.

[0037] In addition, the first dust collecting plate to which a high voltage is applied and the second dust collecting plate that is grounded are electrically connected to one side inside the chamber, and thus the space efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a schematic view illustrating an electric dust collector according to an example embodiment of the present application.

[0039] Figure 2 FIG. 2 is a perspective view illustrating a charging portion of FIG. 1. Figure 1

[0040] In addition, the charging portion is dispersed to the entire system, and thus the voltage applied to the charging portion can be reduced. Thus, the generation of ozone can be reduced and the risk of fire can be reduced.

[0034] In addition, the dust collecting plate is configured by coating carbon on a flexible plastic film layer, and thus the dust collecting plate can be configured to be lighter and cheaper.

[0035] In addition, the high-pressure gas injection portion that removes the fine dust collected to the dust collecting portion is also used to remove the fine dust accumulated on the carbon fiber of the charging portion.

[0036] In addition, the collection space in which collection is achieved inside the chamber that accommodates the dust and the electric connection space to which the dust collecting plate is electrically connected are separated by the blocking plate, and thus a fire caused by contamination of the fine dust at a portion electrically connected to the dust collecting plate can be prevented.

[0037] In addition, the first dust collecting plate to which a high voltage is applied and the second dust collecting plate that is grounded are electrically connected to one side inside the chamber, and thus the space efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 FIG. 1 is a schematic view illustrating an electric dust collector according to an example embodiment of the present application.

[0039] Figure 2 FIG. 2 is a perspective view illustrating a charging portion of FIG. 1. Figure 1

[0040] Figure 3 is a perspective view showing a state in which the fixed bar is rotated in order to remove fine dust of carbon fibers of Figure 2

[0041] Figure 4a and Figure 4b is a schematic view showing a state in which the high-pressure injection part of Figure 1 injects high-pressure gas toward the dust collecting plate.

[0042] Figure 5 is a schematic view showing a state in which the hopper of the suction part of Figure 1 sucks dust.

[0043] Figure 6 is a cross-sectional view showing a part "A" of Figure 5 .

[0044] Figure 7 is a schematic view showing an operation of removing dust in carbon fibers of the charging part accumulated in the electrostatic dust collector of Figure 1 .

[0045] Figure 8 is a schematic view showing an electrostatic dust collector according to another example embodiment of the present application.

[0046] Figure 9 is a schematic view showing a dust collecting part of Figure 8 .

[0047] Figure 10 is a graph showing experimental results of measuring a cleaning efficiency with respect to a flow rate of gas injected from an injection nozzle.

[0048] Figure 11 is a schematic view showing an air purification system of a subway station according to still another example embodiment of the present application.

[0049] Figure 12 is a schematic view showing an air purification part of Figure 11 .

[0050] Figure 13 is a side view showing a dust collecting part of Figure 11 .

[0051] Figure 14 is a perspective view showing a blocking part of Figure 13 .

[0052] Figure 15 is a perspective view showing a first dust collecting plate of Figure 13 .

[0053] Figure 16 is a perspective view showing a second dust collecting plate of Figure 13 .

[0054] ​Figure 17 is a perspective view showing the state in which the first dust collecting plate and the second dust collecting plate of Figure 15 are electrically connected to the fixed part. Figure 16

[0055] Figure 18 is an exploded perspective view of Figure 17

[0056] Figure 19a is a schematic view showing a dust collecting part according to yet another example embodiment of the present application, Figure 19b is a cross-sectional view showing a "B" portion of Figure 19a enlarged, Figure 19c is a cross-sectional view showing a "C" portion of Figure 19a enlarged, and Figure 19d is a cross-sectional view showing a "D" portion of Figure 19a enlarged.

[0057] Figure 20a and Figure 20b are plan views respectively showing one surface of a first dust collecting plate and one surface of a second dust collecting plate as examples of Figure 19a

[0058] Figure 21a and Figure 21b are plan views respectively showing another surface of a first dust collecting plate and another surface of a second dust collecting plate as examples of Figure 19a

[0059] <Reference Signs>

[0060] 10, 10a, 10b, 11: electrostatic dust collector 20: air cleaning system

[0061] 15: recirculation duct 16: recirculation damper

[0062] 30: air supply part 32: pretreatment filter

[0063] 34: air supply damper 50: exhaust part

[0064] 52: exhaust damper 100: housing

[0065] 110: charging part 112: partition plate

[0066] 113: partition space 114: fixed bar

[0067] 115: ion generator 116: carbon fiber

[0068] 118: voltage applying device 120: dust collecting part

[0069] ​​​​122: dust collecting plate 122a: first dust collecting plate

[0070] 122b: second dust collecting plate 1221: thin film layer

[0071] 1222: coating layer 1225a: first main plate portion

[0072] 1225b: second main plate portion 1226a: first electric connection portion

[0073] 1226b: second electric connection portion 1227a: fixing hole

[0074] 1227b: fixing hole 1228a: through hole

[0075] 1228b: through hole 1229a: first fixing rod

[0076] 1229b: second fixing rod 1230: charged element

[0077] 128a: first fixing portion 128b: second fixing portion

[0078] 129: fixing slot 1291: fixing block

[0079] 1292: elastic plate 123: discharge fin

[0080] 130: high pressure gas injection portion 132: injection nozzle

[0081] 134: compressor 140: suction portion

[0082] 142: hopper 145: negative pressure forming portion

[0083] 150: positive pressure forming portion 160: heat exchanger

[0084] 170: pre-treatment filter 200: chamber

[0085] 201: first chamber 202: second chamber

[0086] 203: gap maintaining portion 205: baffle plate

[0087] 206: screw hole 207: slit hole

[0088] 208: bolt 210: electric connection space

[0089] 220: dust collecting space S: sensor DETAILED DESCRIPTION

[0090] The present application will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown.

[0091] However, the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the accompanying drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for clarity.

[0092] The invention will be described more fully below with reference to the accompanying drawings, in which embodiments of the invention are shown.

[0093] Figure 1 This is a schematic diagram illustrating an electrostatic precipitator according to an exemplary embodiment of the present invention. Figure 2 It is shown Figure 1 A perspective view of the charging section. Figure 3 It is shown that in order to remove Figure 2 A perspective view of the state of rotation of the fixing strip caused by the fine dust of carbon fiber. Figure 4a and Figure 4b It is shown Figure 1 A schematic diagram showing the high-pressure jet section spraying high-pressure gas toward the dust collection plate. Figure 5 It is shown Figure 1 A schematic diagram showing the state of dust being drawn into the hopper of the suction section. Figure 6 It is shown Figure 5 A cross-sectional view of part "A". Figure 7 It shows the removal of accumulations in Figure 1 A schematic diagram illustrating the operation of dust in the carbon fiber charging section of an electrostatic precipitator.

[0094] See Figures 1 to 7 According to this example embodiment, the electrostatic precipitator 10 includes a charging unit 110, a dust collection unit 120, a high-pressure gas injection unit 130, and a suction unit 140.

[0095] The housing 100 provides a passage for polluted air, and along the air movement direction as indicated by the arrow, a charging unit 110, a high-pressure gas injection unit 130, a dust collection unit 120, and a suction unit 140 are arranged sequentially. Here, the positions of the high-pressure gas injection unit 130 and the suction unit 140 can be changed. However, for ease of explanation in the following text, as shown in the figures, the high-pressure gas injection unit 130 is interpreted as being located in front of the dust collection unit 120, and the suction unit 140 is interpreted as being located behind the dust collection unit 120.

[0096] The charging unit 110 is provided at the inlet for introducing polluted air and generates ions to charge the fine particles in the polluted air. The charging unit 110 includes an ion generator 115 formed of a plurality of carbon fibers 116 and a voltage application device 118 for applying a high voltage (current) to the ion generator 115.

[0097] As the voltage applying device 118 applies a high voltage (current) to the carbon fiber 116, a large number of ions are generated in the carbon fiber 116. Here, (+) ions or (-) ions can be generated based on the type of current applied from the voltage applying device 118.

[0098] When a high voltage (current) is applied to the ion generator 115 with carbon fiber 116 to generate ions, a large number of ions are generated at a relatively low voltage compared to corona discharge generated by a high voltage between the discharge electrode and the ground electrode, thus preventing ozone generation and reducing power consumption. Furthermore, carbon fiber 116 does not require a ground electrode to generate ions, and carbon fiber 116 does not include a metal-based ground electrode, so that it will not corrode even in strong acid environments.

[0099] Here, as Figure 2 As shown, the charging unit 110 may include a plurality of ion generators 115. A plurality of fixing bars 114 extending in the longitudinal direction are arranged at predetermined intervals, and the ion generators 115 are respectively disposed at predetermined intervals at the fixing bars 114. Windings may be formed in the fixing bars 114 for applying a high voltage from the voltage applying device 118 to each ion generator 115.

[0100] Because the multiple fixing bars 114 are arranged in a horizontal direction substantially perpendicular to the longitudinal direction of each fixing bar, the multiple ion generators 115 are spaced apart from each other by a predetermined distance on the surface of the passage through which the polluted air flows. Here, as... Figure 2 As shown, the separator 112 is positioned adjacent to the space where the ion generator 115 is located, and thus the flowing polluted air is separated and supplied to each separated space 113 formed by the separator 112, and the ions generated by the ion generator 115 in each separated space 113 charge the polluted air. Therefore, the polluted air is discharged by the ions generated by the ion generator 115 in each separated space 113, and thus the charging efficiency of fine particles is increased, thereby increasing the dust collection efficiency.

[0101] Here, the spaces charged by a single ion generator 115 (i.e., the spaces formed by a partition space 113) can be formed equally, and thus the charging efficiency of the flowing polluted air can be uniformly increased.

[0102] The carbon fibers 116 of the ionizer 115 can be formed in a direction opposite to the flow direction of the contaminated air, but in the present example embodiment, the carbon fibers 116 are formed to face the contaminated air, that is, in a direction opposite to the flow direction of the contaminated air, thereby more effectively charging fine particles. Here, as shown in Figure 1 FIG. 6, the ionizer 115 can be provided at the rear side of the partition plate 112 instead of the front side thereof, and the ionizer 115 faces or is directed in the flow direction of the contaminated air.

[0103] The fixing bar 114 fixing a plurality of ionizers 115 can be rotated. As shown in Figure 2 FIG. 7, when charging fine particles, the carbon fibers 116 of the ionizer 115 face or are directed in the flow direction of the contaminated air, that is, in a direction for the supply direction of the contaminated air. However, as shown in Figure 3 FIG. 8, when removing fine dust in the carbon fibers 116 of the ionizer 115, the fixing bar 114 is rotated by 180°, so that the carbon fibers 116 are in the opposite direction. Hereinafter, the carbon fibers 116 will be explained in detail. Figure 7

[0104] Here, each of the fixing bars 114 can be independently rotated, or a plurality of fixing bars 114 can be integrally rotated. A motor can be used to rotate the fixing bar 114, and any existing technology can be used to rotate the fixing bar 114.

[0105] The dust collecting part 120 collects fine particles charged by ions generated in the charging part 110 using electrostatic force on the dust collecting plates 122.

[0106] As shown in Figure 5 FIG. 9, in the dust collecting part 120, a plurality of dust collecting plates 122 are arranged in parallel, and a potential difference is formed between adjacent dust collecting plates 122 for generating electrostatic force. Accordingly, charged particles move due to the electrostatic force to be collected by the dust collecting plates 122. Here, for the plurality of dust collecting plates 122, a first dust collecting plate 122a to which a high voltage is applied and a second dust collecting plate 122b to which a voltage of an opposite polarity is applied or is grounded are alternately provided, so that a potential difference is generated between the dust collecting plates 122a and 112b adjacent to each other, and thus electrostatic force is generated.

[0107] In Figure 5 the dust collecting part 120, each of the dust collecting plates 122 extends in a vertical direction, and the dust collecting plates 122 are arranged in parallel in a horizontal direction, but alternatively, each of the dust collecting plates 122 extends in a horizontal direction, and the dust collecting plates 122 are arranged in parallel in a vertical direction.

[0108] Here, as shown in Figure 6 ​As illustrated, each dust collecting plate 122 includes a thin film layer 1221 and a coating layer 1222. The thin film layer 1221 can have a plastic material and a flexible thin plate shape, and the coating layer 1222 coated with carbon is formed on both surfaces of the thin film layer 1221. Accordingly, electrical connection can be performed through the coating layer 1222. The dust collecting plate 122 has ductility that can be easily bent and is very light. Furthermore, compared to a conventional dust collecting plate having a metal or carbon fiber reinforced plastic (CFRP), the dust collecting plate 122 can be less expensive and can be more easily manufactured.

[0109] The electrostatic precipitator equipped in the subway station has a dust collecting part 120 of large capacity or large size, and thus the number of dust collecting plates 122 can be increased. Accordingly, using the dust collecting plate 122 having the above-described thin film layer 1221 and coating layer 1222, a light and inexpensive dust collecting part 120 can be formed.

[0110] A high voltage gas injection part 130 is provided at a front side of the dust collecting part 120 to inject high pressure gas toward a space between the dust collecting plates 122, and thus fine particles collected on the dust collecting plates 122 are separated from the dust collecting plates 122.

[0111] To supply high pressure gas to the high voltage gas injection part 130, in the present example embodiment, a compressor 134 for generating high pressure gas can be included. Since the cleaning efficiency is very low using a fan or a blower, the compressor 134 is used to inject high pressure gas. Here, in the case of cleaning using high pressure compressed air, a spraying speed that has a critical significance can refer to Figure 10 which will be explained in detail.

[0112] Furthermore, the high pressure gas injected by the high voltage gas injection part 130 generates a flow of gas from the front side to the rear side, such that the separated fine particles move toward the rear side of the dust collecting plates 122. The fine particles separated from the dust collecting plates 122 and moving toward the rear side can be sucked by a suction part 140 provided at the rear side of the dust collecting part 120.

[0113] The injection nozzle 132 of the high voltage gas injection part 130 moves in the up-down-left-right directions. Accordingly, the injection nozzle 132 of the high voltage gas injection part 130 moves along the longitudinal direction and the width direction of the dust collecting plates 122, and injects high pressure gas to the entire dust collecting plates 122.

[0114] Further, as illustrated in Figure 4a and Figure 4b the injection angle of the injection nozzle 132 of the high voltage gas injection part 130 is controlled such that the high pressure gas is uniformly injected to the rear or the front along the flow direction of air, and the high pressure gas is uniformly injected to the entire dust collecting plates 122.

[0115] As illustrated in Figure 4aAs shown, the inlet angle of the high-pressure gas entering the dust collection plate 122 is controlled to be relatively small, and therefore the high-pressure gas reaches the rear of the dust collection plate 122. Alternatively, as Figure 4b As shown, the inlet angle of the high-pressure gas entering the dust collection plate 122 is controlled to be relatively large, and thus the high-pressure gas reaches the front of the dust collection plate 122. Therefore, the high-pressure gas can be evenly distributed throughout the dust collection plate 122.

[0116] Furthermore, although not shown in the figure, in addition to the vertical direction, the angle can also be controlled in the horizontal direction relative to the dust collection plate 122, and thus the high-pressure gas can be evenly distributed to the left and right sides of the dust collection plate 122.

[0117] Furthermore, the injection nozzle 132 of the high-pressure injection unit 130 can rotate in the horizontal direction, such as... Figure 7 As shown. When removing fine dust from the dust collection plate 122, the spray nozzle 132 faces the dust collection section 120 at the front and then sprays high-pressure gas. However, when removing fine dust from the charging section 110 (more specifically, the carbon fiber 116 of the ion generator 115) located in front of the high-pressure spray section 130, the spray nozzle 132 rotates 180° and faces the charging section 110. When dust accumulates on the carbon fiber 116 of the charging section 110, the charging efficiency may decrease rapidly. In this example embodiment, the high-pressure gas spray section 130 located behind the charging section 110 rotates to face the charging section 110 and then sprays high pressure to remove the dust accumulated on the carbon fiber 116 of the charging section 110.

[0118] Here, as referenced Figure 3 As explained, when removing dust from the carbon fiber 116, the retaining bar 114 rotates, and thus the carbon fiber 116 of the ion generator 115 faces the high-pressure gas jet section 130 from the rear.

[0119] The suction unit 140 is located behind the dust collection unit 120 and sucks in and removes fine particles separated from the dust collection unit 122 by the high-pressure gas injection unit 130. For example... Figure 1 As shown, the suction unit 140 includes a negative pressure forming unit 145. The negative pressure forming unit 145 forms a negative pressure with the hopper 142, which is located on the rear side of the dust collection unit 120 and adjacent to the dust collection plate 122, to suck in and draw in fine dust.

[0120] Therefore, since the suction section 140 is also formed with a high-pressure gas injection section 130, fine particles separated from the dust collection plate 122 can be sucked in and removed more effectively.

[0121] Here, as Figure 5As shown, the hopper 142 may have a rectangular cross-sectional shape and move in the up, down, left and right directions to suck up fine particles that move toward the rear side of the dust collection plate 120 through the high-pressure gas jet section 130.

[0122] Here, the nozzle 132 of the high-pressure gas injection section 130 is controlled to face the hopper 142 of the suction section 140, and thus can effectively suck up fine particles distributed throughout the dust collection plate 120.

[0123] Here, the shape of the hopper 142 is not limited to this, and the size and amount of movement can be changed in different ways.

[0124] The operation of the electrostatic precipitator 10 according to this example embodiment is explained below.

[0125] Polluted air is introduced through the inlet of the housing 100, and then ions generated by the charging unit 110 charge the fine particles. Here, ions can be generated by applying a high voltage to the ion generator 115, which has 116 strands of carbon fiber, and a large number of ions can be generated at a relatively low voltage, thereby minimizing ozone.

[0126] Here, as Figure 2 As shown, multiple ion generators 115 are arranged separately along the airflow surface, and air is introduced into the separation space 113 and then separated by the partition plate 112, thus maximizing the charging efficiency. Further, in this example embodiment, the carbon fibers 116 of the ion generators 115 are positioned on the rear side of the partition plate 112 facing the direction of the polluted airflow, thereby charging the fine particles.

[0127] Charged fine particles move toward the rear dust collection section 120. A potential difference is generated between the parallel, adjacent dust collection plates 122a and 122b, and then an electrostatic force is generated. Therefore, the charged particles are collected on the dust collection plates 122a and 122b.

[0128] Therefore, dust is collected by electrostatic precipitator for a predetermined time, and then the fine particles collected on the dust collection plate 122 are removed.

[0129] Here, the voltage applied to the dust collection plate 122a is stopped, and the high-pressure gas injection section 130 and the suction section 140 are respectively provided on the front and rear sides of the dust collection section 120. Here, the high-pressure gas injection section 130 and the suction section 140 can always be provided on their front and rear sides, but alternatively, the high-pressure gas injection section 130 and the suction section 140 are provided on one side of the passage in the housing, and then provided on their front and rear sides when removing fine particles collected in the dust collection plate 122.

[0130] The high-pressure gas injection part 130 injects gas into the space between the dust collecting plates 122 to separate the fine particles collected in the dust collecting plates 122 from the dust collecting plates 122 and forms a flow from the front side toward the rear side to move the fine particles toward the rear side of the dust collecting part 120. Here, the suction part 140 provided at the rear side of the dust collecting part 120 suctions and removes the fine particles using negative pressure.

[0131] Here, the injection nozzle 132 of the high-pressure gas injection part 130 and the hopper 142 of the suction part 140 can be respectively controlled to move up and down to positions opposite to each other and treat the fine particles for the entire area (the entire dust collecting plate 122) of the dust collecting part 120.

[0132] In addition, the electric dust collector 10 according to the present example embodiment can remove the fine particles accumulated on the carbon fiber 116 of the charging part 110. As the fine particles are accumulated on the carbon fiber 116, the charging efficiency can be reduced. Therefore, the fine particles on the carbon fiber 116 should be periodically removed.

[0133] Here, as shown in Figure 3 and Figure 7 , the fixed bar 114 is rotated by 180° and the injection nozzle 132 of the high-pressure gas injection part 130 is rotated by 180° and then high-pressure gas is injected from the injection nozzle 132 toward the carbon fiber 116. Therefore, the fine particles on the carbon fiber 116 can be removed. Here, by moving the injection nozzle 132 in the up and down and left and right directions, fine dust or fine particles can be removed with respect to a plurality of ionizers 115.

[0134] Hereinafter, an electric dust collector according to another example embodiment of the present application will be explained with reference to Figure 8 and Figure 9 .

[0135] Figure 8 is a schematic view showing an electric dust collector according to another example embodiment of the present application. Figure 9 is a schematic view showing a dust collecting part of Figure 8 .

[0136] In the previous example embodiment, Figures 1 to 7 the electric dust collector 10 in is a 2-stage electric dust collector in which the charging part 110 and the dust collecting part 120 are separated along the flow direction of air, but in the present example embodiment, the electric dust collector 11 is a 1-stage electric dust collector in which the charging part 110 and the dust collecting part 120 are not separated. Therefore, the same reference numerals are used for the same elements and any repeated explanation will be omitted.

[0137] Referring to Figure 8 and Figure 9In the electric dust collector 11 according to the present example embodiment, a plurality of dust collecting plates 122 are arranged in parallel as explained above, but a plurality of discharge fins 123 are formed at the dust collecting plates 122. The discharge fins 123 protrude in a sharp shape on the edge of the plate surface of the dust collecting plate 122 or on the outer edge of the hole formed on the plate surface of the dust collecting plate 122. Therefore, when a high voltage is applied to the dust collecting plate 122, ions are generated by the discharge fins 123 of the sharp shape. Further, the dust collecting plate 122a to which the high voltage is applied and the dust collecting plate 122b adjacent to the plate 122a form a potential difference to move the charged fine particles charged by the ions generated by the discharge fins 123 toward the dust collecting plate 122b, and then collect the fine particles.

[0138] The high-pressure gas injection portion 130 and the suction portion 140 are the same as explained above, and then the repeated explanation is omitted.

[0139] Figure 10 is a graph showing experimental results of measuring the cleaning efficiency with respect to the flow rate of the gas injected from the injection nozzle.

[0140] Table 1 shows experimental results of the dust cleaning (removal) efficiency in the dust collecting plate 120 in which the flow rate is changed using the injection nozzle 132 having an elliptical SUS tube. Here, the cleaning time is the same as 100 seconds, and the cleaning experiment is performed using two injection nozzles 132 of the same size at the same time.

[0141] [Table 1]

[0142]

[0143]

[0144] For the tube connected from the compressor 134 to the injection nozzle 132, the flow rate is measured by installing a flowmeter at a position 38 cm backward from the tip of the injection nozzle 132, and the pressure of the injection gas is measured by installing a pressure gauge at a position 30 cm backward from the flow rate. The flow rate of the injection gas is calculated using the measured flux, the pressure, and the cross-sectional area of the injection nozzle 132. In addition, the experimental results of the removal efficiency of the dust collecting portion 120 according to the flow rate are shown in Table 1, and are shown in Figure 10 .

[0145] As Figure 10 shown, regardless of the number of injection nozzles 132 for cleaning, when the flow rate of the injection gas is 250 m / s or more, the removal efficiency reaches close to 90%. Therefore, when cleaning the dust collecting portion in a dry condition, the flow rate of the gas injected from the injection nozzle 132 has a greater influence on the removal (cleaning) efficiency than the shape of the injection nozzle 132 or the flux of the gas. Here, it is preferable to inject the gas at a speed of at least 250 m / s.

[0146] Figure 11 is a schematic view showing an air purification system of a subway station according to still another example embodiment of the present application. Figure 12 is a schematic view showing an air purification portion of Figure 11 .

[0147] In the air purification system 20 of a subway station according to the present example embodiment, the electrostatic precipitators 10 and 11 according to the previous example embodiments in Figures 1 to 10 are applied, and the electrostatic precipitators 10 and 11 can be disposed at various positions of the air purification system 20.

[0148] However, for ease of explanation, Figure 1 the electrostatic precipitator 10 in Figure 8 is taken as an example applied to the air purification system 20, but the electrostatic precipitator 11 in

[0149] may also be applied to the air purification system 20.

[0150] Further, the same reference numerals are used for the same elements of the electrostatic precipitator 10, and any repeated explanation will be omitted. Figure 11 Figure 12 Referring to and

[0151] , the air purification system 10 of a subway station according to the present example embodiment includes an air supply portion 30, an electrostatic precipitator 10, an exhaust portion 50, and a controller (not shown).

[0152] The air supply portion 30 sucks clean air on the ground into the underground. Here, the air sucked by the air supply portion 30 is not directly supplied to the underground space (such as a waiting room or a platform), but is supplied to the underground space after purification.

[0153] A fan or a pump (not shown) can be formed in the air supply portion 30 for sucking outside air into it. Further, a pre-treatment filter 32 filtering relatively large-sized dust in the sucked air can be provided in the air supply portion 30. Fine particles not collected by the pre-treatment filter 32 can be collected and treated by the electrostatic precipitator 10 at the rear side.

[0154] An air supply damper 34 is formed at the inlet of the electrostatic precipitator 10, which is one end of the air supply portion 30, and the flux of air flowing into the electrostatic precipitator 10 is controlled. Relatively clean air from the outside is diluted by contaminated air within the underground space and is supplied to the electrostatic precipitator 10, and the controller controls the amount of opening or closing of the air supply damper 34 to control the amount of air according to the outside air condition or the air condition in the underground space.

[0155] As explained above, the electric dust collector 10 includes the dust collecting part 120, the high-pressure gas injection part 130, and the suction part 140, and the electric dust collector 10 can further include the heat exchanger 160.

[0156] As explained above, the electric dust collector 10 receives and purifies the outside air flowing in from the air supply part 30 and the contaminated air flowing in from the underground space, such as a waiting room and a platform, and then supplies the purified air to the underground space. In the present exemplary embodiment, the waiting room or the platform is explained as an example of the underground space, but is not limited thereto, and the underground space can include a large-sized underground space, such as an underground mall, which requires air purification.

[0157] The recirculation duct 15 connecting the underground space to the electric dust collector 10 can be equipped for providing the underground contaminated air to the electric dust collector 10, and a pump or a fan (not shown) that sucks the underground air and provides the underground air to the electric dust collector 10 can be equipped inside the recirculation duct 15.

[0158] In the present exemplary embodiment, the electric dust collector 10a that purifies the air of the platform and the electric dust collector 10b that purifies the air of the waiting room are separately equipped, but a single electric dust collector 10 can also be equipped, and then the contaminated air from the two spaces can be simultaneously received and purified by the single electric dust collector 10.

[0159] The recirculation damper 16 is provided at the inlet of the electric dust collector 10 that is the end of the recirculation duct 15, thereby controlling the flow rate of the air flowing into the electric dust collector 10 from the underground space.

[0160] The controller controls the operation of the air supply damper 34 and the recirculation damper 16. For example, 30% of the air flowing into the electric dust collector 10 can allow the outside air to flow through the air supply part 30, and the remaining 70% can allow the contaminated air from the underground space to flow in. Further, when the pollution level of the outside air is high, it is preferable that the air supply damper 34 is controlled so that the flow rate of the outside air introduced from the air supply part 30 becomes less. The relatively clean outside air is diluted by the contaminated air within the underground space and is supplied to the electric dust collector 10, and the controller controls the closing and opening of the air supply damper 34 and the recirculation damper 16 according to the outside air condition measured by the sensor S or the air condition in the underground space to control the amount of air flowing into the electric dust collector 10.

[0161] The pre-treatment filter 170 that filters relatively large-sized dust can be provided inside the electric dust collector 10.

[0162] The dust collection section 120 is disposed behind the pretreatment filter 170. The dust collection section 120 collects and processes charged fine particles by electrostatic force. In this example embodiment, the electrostatic precipitator 10 can be a two-stage electrostatic precipitator, wherein the charging section 110, which charges the fine particles, and the dust collection section 120, which collects the charged fine particles, are separated. Here, the charging section 110 emits ions with positive or negative polarity, and the fine particles collide with the ions to become charged. Figure 11 As shown, the charging unit 110 can be formed at at least one of the following locations: the front side of the dust collection section 120 of the electrostatic precipitator 10, inside the duct of the air supply section 30, inside the recirculation duct 15, or at the inlet to which the recirculation duct 15 in an underground space is connected. As explained above, the high-pressure gas injection section 130 and the suction section 140 are respectively provided at the front and rear of the dust collection section 120, and the internal space of the electrostatic precipitator 10 is very narrow. Therefore, in this example embodiment, the charging unit 110 is provided at multiple locations in the passage through which the air to be purified is introduced by the dust collection section 120, and thus the problem caused by the narrow space inside the electrostatic precipitator 10 can be solved.

[0163] Therefore, since the charging unit 110 is arranged at various positions in the air passage, which means that the charging unit 110 is spaced apart from the dust collection unit 120, the dust collection efficiency can be further enhanced.

[0164] Generally, increasing the charging time is important for increasing dust collection efficiency. However, when the charging unit and the dust collection unit are integrally formed or attached, in conventional technology, a high voltage is applied to increase the dust collection efficiency, which in turn increases ozone production and the risk of fire.

[0165] Therefore, in this example embodiment, since the charging unit 110 is spaced apart from the dust collection unit 120, the charging time is increased to infinity, and thus the dust collection efficiency can be increased without applying an additional high voltage.

[0166] In this example embodiment, the charging unit 110 may be disposed at multiple locations among the mentioned positions. Therefore, as in this example embodiment, the charging unit 110 is disposed at various locations along the path of the polluted air, and the voltage applied to each charging unit 110 can be low, thus preventing ozone generation and reducing the risk of fire.

[0167] The heat exchanger 160 is located behind the dust collection unit 120 to reduce or increase the temperature of the purified air purified by the dust collection unit 120 for use in cooling or heating underground spaces.

[0168] The exhaust unit 50 discharges air from the underground space. Here, the amount of air discharged by the exhaust unit 50 can be controlled to be the same as the amount of air introduced by the air supply unit 30, but it is not limited to this.

[0169] As Figure 11 shown, the exhaust portion 50 can include a duct connecting the underground space to an air outlet tower on the ground, and elements inside the duct.

[0170] A fan or a pump (not shown) can be formed at the exhaust portion 50 to exhaust air in the underground space to the outside. In addition, an exhaust damper 52 is formed at an inlet of the exhaust portion 50 connected to the underground space to control the flow rate of air exhausted from the underground space to the outside. A controller can control the opening and closing of the exhaust damper 52.

[0171] In Figure 11 , the exhaust portion 50 is provided to be directly connected to the underground space, but as Figure 12 , the exhaust portion 50 can be branched from the middle of the recirculation damper 16.

[0172] The controller (not shown) is a control device that controls the entire system, and controls the charging portion 110, the dust collecting portion 120, the high-pressure gas injection portion 130, the suction portion 140, the heat exchanger 160, the dampers 15, 32, and 52, etc. based on the conditions of the outside air or the underground air measured by the sensor S.

[0173] The charging portion 110, the dust collecting portion 120, the high-pressure gas injection portion 130, and the suction portion 140 of the electrostatic dust collector 10 are the same as explained with reference to Figures 1 to 10 , and thus the repeated explanation is omitted.

[0174] Hereinafter, the dust collecting portion 120 is explained in detail with reference to Figures 13 to 18 .

[0175] Figure 13 is a side view showing the dust collecting portion of Figure 11 . Figure 14 is a perspective view showing the blocking portion of Figure 13 . Figure 15 is a perspective view showing the first dust collecting plate of Figure 13 . Figure 16 is a perspective view showing the second dust collecting plate of Figure 13 . Figure 17 is a perspective view showing a state in which the first dust collecting plate and the second dust collecting plate of Figure 15 and Figure 16 are electrically connected to the fixing portion. Figure 18 is an exploded perspective view of Figure 17 .

[0176] With reference to Figures 13 to 18 , in the dust collecting portion 120, as described above, the first dust collecting plate 122a to which a high voltage is applied and the second dust collecting plate 122b to which a voltage of a different polarity from that of the first dust collecting plate 122a is applied are alternately arranged in parallel, and thus the dust collecting efficiency can be enhanced.

[0177] The first dust collecting plate 122a and the second dust collecting plate 122b are accommodated by the chamber 200. Here, the chamber 200 is divided into an electric connection space 210 and a dust collecting space 220 by a barrier plate formed inside the chamber 200.

[0178] In the present exemplary embodiment, the chamber 200 is divided into a first chamber 201 and a second chamber 202. One side of the first chamber 201 is open, and the first chamber 201 forms the electric connection space 210. Also, one side of the second chamber 202 is open, and the second chamber 202 forms the dust collecting space 220. Accordingly, the first chamber 201 and the second chamber 202 are combined with each other using the bolt 208, in which the open sides of the first chamber 201 and the second chamber 202 face each other, and then the chamber 202 in which the dust collecting plates 122 are accommodated inside is formed. Here, in the present exemplary embodiment, the barrier plate 205 is disposed between the first chamber 201 and the second chamber 202 when the first chamber 201 and the second chamber 202 are combined with each other, and then the chamber 200 can be divided into the electric connection space 210 and the dust collecting space 220.

[0179] As shown in FIG. 2, a plurality of screw holes 206 are formed through the barrier plate 205, in which the bolt 208 is inserted through the screw holes 206 when the first chamber 201 and the second chamber 202 are combined. Figure 14

[0180] In addition, a plurality of slit holes 207 are formed through the barrier plate 205, and the first dust collecting plate 122a and the second dust collecting plate 122b are inserted through the slit holes 207. Each of the slit holes 207 has a rectangular shape identical to the cross-sectional shape of each of the first dust collecting plate 122a and the second dust collecting plate 122b.

[0181] Referring to FIGS. 2 and 3, Figure 15 and Figure 16 In the present exemplary embodiment, a first electric connection part 1226a is formed at one end of the first dust collecting plate 122a. The first electric connection part 1226a is inserted into the fixing slot 129 and electrically connects the first dust collecting plate 122a to the outside. Likewise, a second electric connection part 1226b is formed at one end of the second dust collecting plate 122b. The second electric connection part 1226b is inserted into the fixing slot 129 and electrically connects the second dust collecting plate 122b to the outside.

[0182] Accordingly, when the first dust collecting plate 122a and the second dust collecting plate 1226 are inserted into the slit holes 207, the first electric connection part 1226a and the second electric connection part 1226b are disposed in the upper electric connection space 210, and the first main plate part 1225a and the second main plate part 1225b that collect the charged fine particles are disposed in the dust collecting space 220 of the chamber 200.

[0183] ​Therefore, in this example embodiment, the baffle 205 prevents fine particles within the dust collection space 220 from being introduced into the electrical connection space 210. Fine particles separated from the dust collection plate 122 by the high-pressure gas jet 130 during cleaning of the dust collection plate 122 can accumulate on the portion of the dust collection plate 122 that is electrically connected to the outside, and may cause contamination, which could potentially cause a fire when high voltage is applied. Therefore, in this example embodiment, the baffle 205 separates the chamber 200 that houses the dust collection plate 122, and thus prevents the aforementioned risk of fire.

[0184] In this example embodiment, a positive pressure forming part 150 is provided to provide gas into the electrical connection space to form a positive pressure, and thus fine dust can be prevented from being introduced into the gap between the slit hole 207 of the baffle plate 205 and the dust collection plate 122 due to the pressure difference in the electrical connection space 210.

[0185] In the chamber 200, a gap retaining portion 203 (such as a baffle plate 210) having a plurality of slit holes can be formed therein to maintain the gap between adjacent dust collection plates 122. Here, the number of gap retaining portions 203 can be varied according to the length or gap of the dust collection plates 122.

[0186] Furthermore, in this example embodiment, the first electrical connection portion 1226a of the first dust collection plate 122a and the second electrical connection portion 1226b of the second dust collection plate 122b are disposed on one side of the chamber 200. Instead of forming baffle plates 205 in the upper and lower portions of the chamber 200, and electrically connecting the first dust collection plate 122a to the first electrical connection portion 1226a in the upper portion and the second dust collection plate 122b to the second electrical connection portion 1226b, a single baffle plate 205 is formed in the upper portion of the chamber 200, and then the first electrical connection portion 1226a of the first dust collection plate 122a and the second electrical connection portion 1226b of the second dust collection plate 122b are electrically connected to the outside of the electrical connection space 210 formed on one side of the chamber 200. Therefore, in this example embodiment, space efficiency can be improved compared to the first dust collection plate and the second dust collection plate respectively formed in the upper and lower portions of the chamber 200.

[0187] To execute the above structure, such as Figure 15 As shown, the first dust collection plate 122a includes a first main board portion 1225a and a first electrical connection portion 1226a extending from the first main board portion 1225a. Here, the first electrical connection portion 1226a is formed on the top of the first main board portion 1225a and has a width narrower than the width of the first main board portion 1225a. The first electrical connection portion 1226a is disposed on one side of the first main board portion 1225a.

[0188] Similarly, as Figure 16As shown, the second dust collection plate 122b includes a second main plate portion 1225b and a second electrical connection portion 1226b extending from the first main plate portion 1225b. Here, the second electrical connection portion 1226b is formed on the top of the second main plate portion 1225b and has a width narrower than the width of the second main plate portion 1225b. The second electrical connection portion 1226b is disposed on the other side of the second main plate portion 1225b.

[0189] like Figure 17 and Figure 18 As shown, when multiple first dust collection plates 122a and multiple second dust collection plates 122b are alternately arranged, the first electrical connection portion 1226a is arranged on one side and the second electrical connection portion 1226b is arranged on the other side, and therefore there is no overlapping area or the overlap is minimized when viewed from the side.

[0190] Here, a first fixing part 128a is formed in the upper portion of the first dust collection plate 122a, and the first fixing part 128a is electrically connected to a plurality of first dust collection plates 122a to apply a high voltage. For example... Figure 17 and Figure 18 As shown, the first fixing part 128a has a plate shape and has a plurality of fixing slots 129 formed through the plate and spaced apart from each other. The first electrical connection part 1226a is inserted into the fixing slots 129 and electrically connected. Therefore, all the fixing slots 129 are electrically connected, so that the plurality of first dust collection plates 122a simultaneously receive a high voltage by providing a high voltage to the first fixing part 128a.

[0191] Here, the fixing slot 129 includes a fixing block 1291 and an elastic plate 1292. The fixing block 1291 protrudes vertically from the plate shape of the first fixing portion 128a. The elastic plate 1292 is arranged adjacent to the fixing block 1291, protruding from the plate shape of the first fixing portion 128a, and has elastic deformation when the electrical connection portions 1266a and 1266b are inserted. The elastic plate 1292 is made of conductive material, and therefore when the electrical connection portions 1266a and 1266b are inserted between the fixing block 1291 and the elastic plate 1292, the electrical connection portions 1266a and 1266b in contact with the elastic plate 1292 are electrically connected to the outside via the elastic plate 1292.

[0192] The second fixing part 128b, which is electrically connected to the second dust collection plate 122b, is basically the same as the first fixing part 128a.

[0193] Here, the first fixing part 128a is provided on one side of the electrical connection space 210, and the second fixing part 128b is provided on the other side of the electrical connection space 210, so that electrical interference can be prevented between the first fixing part 128a and the second fixing part 128b.

[0194] Furthermore, as referenced Figure 15 and Figure 16As explained, the first electrical connection portion 1226a protrudes from one side of the first dust collecting plate 122a, and the second electrical connection portion 1226b protrudes from the other side of the second dust collecting plate 122b, such that the overlapping area is minimized. Thus, the electrical and physical interference between the first dust collecting plate 122a and the second dust collecting plate 122b can be minimized. Figure 19a is a schematic view illustrating a dust collecting portion according to yet another example embodiment of the present application, Figure 19b is a cross-sectional view illustrating a portion of Figure 19a enlarged from "B" of Figure 19c is a cross-sectional view illustrating a portion of Figure 19a enlarged from "C" of Figure 19d is a cross-sectional view illustrating a portion of Figure 19a enlarged from "D" of Figure 20a and Figure 20b are plan views respectively illustrating one surface of a first dust collecting plate and one surface of a second dust collecting plate as examples of Figure 19a Figure 21a and Figure 21b are plan views respectively illustrating another surface of a first dust collecting plate and another surface of a second dust collecting plate as examples of Figure 19a

[0195] With regard to the dust collecting portion 120 in the present example embodiment, in addition to the characteristics of the dust collecting portion explained with reference to Figures 13 to 18 , the following explains the different configuration of the dust collecting portion 120.

[0196] First, with reference to Figure 19a and Figure 19b , in the present example embodiment, the dust collecting plates 122 are disposed in the chamber 300 by maintaining the gap of the first dust collecting plate 122a and fixing the first dust collecting plate 122a by at least one first fixing rod 1229a, and by maintaining the gap of the second dust collecting plate 122b and fixing the second dust collecting plate 122b by at least one second fixing rod 1229.

[0197] Here, as shown in Figure 20a and Figure 21a , at least one fixing hole 1227a and at least one through hole (cut-out groove having a semicircular shape in the upper portion of the first dust collecting plate 122a in the drawing) 1228a or groove 1228a are formed in the first dust collecting plate 122a and spaced apart, the first fixing hole 1227a is fixed to the first fixing rod 1229b, and the through hole 1228a or groove 1228a has a relatively large diameter such that the second fixing rod 1229b penetrates through the through hole 1228a. In addition, although not shown, the fixing hole 1227a can also be formed as a cut-out fixing groove having a semicircular shape at the edge of the first dust collecting plate 122a.

[0198] ​​Also, as shown in Figure 20b and Figure 21b The through hole 1228b is provided to correspond to the fixing hole 1227a of the first dust collecting plate 122a, and the first fixing bar 1229a penetrates the through hole 1228b. The fixing hole 1227b is provided to correspond to the through hole (or groove) 1228a of the first dust collecting plate 122a, and the second fixing bar 1229b is fixed to the fixing hole 1227b. As explained in the first dust collecting plate 122a, in the second dust collecting plate 122b, a fixing groove or a through hole (or groove) can be formed at the edge of the second dust collecting plate 122b.

[0199] In the present exemplary embodiment, three first fixing bars 1229a and three second fixing bars 1229b are formed to penetrate the upper, middle, and lower portions of the dust collecting plates 122a and 122b, but the number of each of the first fixing bars 1229a and the second fixing bars 1229b is not limited thereto. As the size and number of the dust collecting plates 122a and 122b increase, the number of each of the first fixing bars 1229a and the second fixing bars 1229b increases. However, as the size and number of the dust collecting plates 122a and 122b decrease, the number thereof can decrease.

[0200] Accordingly, the first fixing bars 1229a are inserted into the fixing holes 1227a of the first dust collecting plate 122a and the through holes 1228b of the second dust collecting plate 122b, but the first fixing bars 1229a do not come into contact with the through holes 1228b and the second dust collecting plate 122b having a relatively large diameter, and come into contact with and are supported by the first dust collecting plate 122a. Accordingly, the first dust collecting plates 122a are electrically connected to each other by the first fixing bars 1229a, but the second dust collecting plate 122b is electrically insulated.

[0201] Further, the second fixing bars 1229b are inserted into the through holes 1228a of the first dust collecting plate 122a and the fixing holes 1227b of the second dust collecting plate 122b, but the second fixing bars 1229b do not come into contact with the through holes 1228a and the first dust collecting plate 122a having a relatively large diameter, and come into contact with and are supported by the second dust collecting plate 122b. Accordingly, the second dust collecting plates 122b are electrically connected to each other by the second fixing bars 1229a, but the first dust collecting plate 122a is electrically insulated.

[0202] Here, one of the first fixing bars 1229a can be connected to a high voltage generation part outside the chamber 300, and thus when a high voltage is applied to the first fixing bar 1229a, the first dust collecting plate 122a in contact with the first fixing bar 1229a receives the high voltage.

[0203] Similarly, one of the second fixing rods 1229b is grounded outside the chamber 300, and the second dust collection plate 122b in contact with the second fixing rod 1229b is also grounded.

[0204] In this exemplary embodiment, apart from the first fixing rod 1229a and the second fixing rod 1229b, the dust collection plates 122a and 122b do not contact any other components of the chamber 300. Therefore, keeping only the exterior of the chamber 300, where the first fixing rod 1229a and the second fixing rod 1229b are electrically connected, prevents the first dust collection plates 122a and 122b from being electrically shocked by moisture. Thus, in this exemplary embodiment, the risk of fire caused by electrical shock due to moisture between the first dust collection plates 122a and 122b can be easily prevented.

[0205] Here, as Figure 19c , Figure 20a and Figure 20b As shown, the first dust collection plate 122a or the second dust collection plate 122b may have a coating, wherein carbon C is coated on at least one surface of a thin film layer of plastic P. Therefore, the coating with carbon C is in electrical contact with the first fixing rod 1229a or the second fixing rod 1229b through fixing holes 1227a and 1227b. Here, the dust collection plate 122 can have relatively high flexibility and can be lightweight. Furthermore, the method for manufacturing the dust collection plate 122 is relatively simple, and the corrosion resistance of the dust collection plate 122 is relatively high compared to metal-based dust collection plates.

[0206] exist Figure 19b In the figure, the first dust collection plate 122a is fixed through the fixing hole 1227a and electrically connected to the first fixing rod 1229a. As shown, the fixing rod 1229a is not integrally formed, but rather multiple first fixing rods 1229_1a, 1229_2a, and 1229_3a are arranged in a row and connected by screws. Here, a screw with a convex thread is formed on one side of the first fixing rods 1229_1a, 1229_2a, and 1229_3a in the longitudinal direction, and a screw groove with a concave thread is formed on the other side of the first fixing rods 1229_1a, 1229_2a, and 1229_3a. Therefore, by connecting the screw groove to the screw, multiple first fixing rods 1229_1a, 1229_2a, and 1229_3a are connected in a row to form the first fixing rod 1229a. Here, the screw is inserted into the fixing hole 1227a to fix the first dust collection plate 122a between the two first fixing rods, and the coated edge of the fixing hole 1227a contacts and is electrically connected to the first fixing rod 1229a.

[0207] Also as previously described, the second fixing bar 1229b can be configured, the second dust collecting plate 122b can be fixed by the second fixing bar 1229b, and the second dust collecting plate 122b can be electrically connected. Therefore, any repeated explanation is omitted.

[0208] Further, as shown in Figure 19d , the first dust collecting plate 122a or the second dust collecting plate 122b has a first coating in which carbon C is coated on at least one surface of a film layer having plastic P, and a second coating in which plastic P is additionally coated on the first coating. Here, in Figure 19d , the first coating and the second coating are formed on both surfaces of the film layer, respectively.

[0209] Here, as shown in Figure 20a and Figure 20b , the second coating formed on one surface of the first dust collecting plate 122a and the second dust collecting plate 122b has a larger cross-sectional area than the first coating, and thus the second coating protrudes to the outside of the first coating to cover the first coating. Therefore, the edge of the first coating is prevented from being exposed, and thus a spark at the dust collecting plate 122 when a high voltage is applied to the dust collecting plate 122 can be prevented.

[0210] As shown in Figure 21a and Figure 21b , the second coating formed on the other surface of the first dust collecting plate 122a and the second dust collecting plate 122b does not cover a portion (an upper portion or a lower portion) of the first coating and exposes the portion, and thus the first fixing bar 1229a or the second fixing bar 1229b is electrically connected.

[0211] Here, the second coating is not formed on the lower portion of the first dust collecting plate 122a to expose a portion of the first coating formed of carbon, so that a high voltage can be applied to a plurality of the first dust collecting plates 122a through the fixing hole 1227a formed on the first coating and the first fixing bar 1229a combined with the fixing hole 1227a. Further, a portion of the first coating formed of carbon is exposed on the upper portion of the second dust collecting plate 122b, so that a plurality of the second dust collecting plates 122b are grounded through the fixing hole 1227b formed on the first coating and the second fixing bar 1229b combined with the fixing hole 1227b.

[0212] The edge of the first coating exposed on the other surface of the dust collecting plates 122a and 122b, which is not coated with the second coating, can be coated with a separate insulating material. Alternatively, the edge of the first coating is blocked by an insulating tape.

[0213] The dust collecting plates 122a and 122b of the present example embodiment are as shown in Figure 19cis very light, and a method for manufacturing the dust collecting plates 122a and 122b is very simple. In addition, compared to Figure 19c the second coating layer has plastic P, the electrostatic force can be lower, but the second coating layer covers the first coating layer, and thus the corrosion resistance can be increased.

[0214] The shape of the first dust collecting plate 122a can be different from the shape of the second dust collecting plate 122b. Thus, the first dust collecting plate 122a can be formed as Figure 19c indicated, and the second dust collecting plate 122b can be formed as Figure 19d indicated. Alternatively, the first dust collecting plate 122a can be formed as Figure 19d indicated, and the second dust collecting plate 122b can be formed as indicated in FIG. 19C. Further, the second dust collecting plate 122b can be a metal plate.

[0215] The size of the first dust collecting plate 122a to which a high voltage is applied is about 10% smaller than the size of the second dust collecting plate 122b, and thus the first dust collecting plate 122a can be disposed between two second dust collecting plates 122b adjacent to each other.

[0216] In addition, as Figure 19c indicated, when the dust collecting plate 122 is formed of a plastic film layer and a carbon coating layer, the carbon is coated on the inside of the film layer and the area of the film layer is greater than the area of the coating layer, the edges of the carbon layer are coated with a separate insulating material, or are blocked by an insulating tape.

[0217] The operation of the electrostatic dust collector 10 can be substantially the same as the operation of the electrostatic dust collector explained with reference to Figure 1 , and thus the repeated explanation is omitted.

[0218] The electrostatic dust collector according to the embodiment of the present application collects fine particles using an electric collection method (without using a filter), and thus the cost of filter replacement can be reduced, and the fine particles collected in the dust collecting plate can be easily and inexpensively removed using the high-pressure gas injection part and the suction part.

[0219] In addition, the charge is dispersed to the entire system, and thus the voltage that can be applied to the charging part is reduced. Thus, the generation of ozone can be reduced and the risk of fire can be reduced.

[0220] In addition, the dust collecting plate is formed by coating carbon on a flexible plastic film layer, and thus the dust collecting plate can be constructed more lightly and inexpensively.

[0221] In addition, the high-pressure gas injection part that removes the fine dust collected to the dust collecting part is also used to remove the fine dust accumulated on the carbon fiber of the charging part.

[0222] Further, the collection space in which collection is achieved within the dust-containing chamber and the electric connection space to which the dust collecting plate is electrically connected are separated by the blocking plate, so that a fire caused by contamination with fine dust at a portion electrically connected to the dust collecting plate can be prevented.

[0223] Further, the first dust collecting plate to which a high voltage is applied and the second dust collecting plate grounded are electrically connected to one side of the chamber, so that space efficiency can be improved.

[0224] While exemplary embodiments of the present application have been described, it is to be understood that the application is not limited to the above-described exemplary embodiments and that various changes and modifications can be suggested to one ordinarily skilled in the art and others, without departing from the spirit and scope of the application as disclosed in the following claims.

Claims

1. An electrostatic precipitator that collects charged fine particles by charging polluted air, said electrostatic precipitator comprising: The dust collection section collects the charged fine particles by electrostatic force. A high-pressure gas injection unit injects high-pressure gas from one side of the dust collection unit toward the charged fine particles in the dust collection unit; The suction unit, which draws in the fine particles separated from the dust collection unit by the high-pressure gas injection unit from the other side of the dust collection unit; and A charging unit, disposed on the front side of the dust collection unit, includes multiple ion generators with carbon fibers, wherein the multiple ion generators are spaced apart from each other at at least one fixed rod. The high-pressure gas injection unit includes an injection nozzle configured to inject the high-pressure gas. The suction section includes a hopper. The injection nozzle and the hopper are moved to a position opposite to each other. The spray nozzle is rotated 180° to face one of the dust collection section and the charging section. When the fine particles are charged, the fixing rod rotates, causing the carbon fiber to align with the direction in which the polluted air is introduced. When the injection nozzle rotates to face the charging unit, the fixing rod rotates, causing the carbon fiber to face the injection nozzle, so that the injection nozzle directly injects high-pressure gas onto the carbon fiber.

2. The electrostatic precipitator according to claim 1, wherein, The spray nozzle can change its angle.

3. The electrostatic precipitator according to claim 1, wherein, The dust collection section includes multiple dust collection plates arranged in parallel, and a potential difference is generated between adjacent dust collection plates. The high-pressure gas injection section is located on the side of the dust collection section for introducing fine particles, and the suction section is located on the other side of the dust collection section opposite to the high-pressure gas injection section.

4. The electrostatic precipitator according to claim 3, wherein, The dust collection plate includes: a first dust collection plate to which a high voltage is applied; and a second dust collection plate, the second dust collection plate collecting the charged fine particles by means of the electrostatic force generated by the potential difference with the first dust collection plate. The edge of the first dust collection plate has at least one discharge fin.

5. The electrostatic precipitator according to claim 1, wherein, The charging unit has a voltage application device for applying a high voltage to the carbon fiber. The high-pressure gas injection section is disposed between the charging section and the dust collection section, and injects high-pressure gas toward the charging section to remove the fine particles accumulated on the carbon fibers.

6. The electrostatic precipitator according to claim 1, wherein, The dust collection unit includes: Multiple first dust collection plates are subjected to a high voltage and are arranged in parallel spaced apart from each other, and a first electrical connection portion is formed at one end of the multiple first dust collection plates; A plurality of second dust collection plates are arranged between the first dust collection plates to generate a potential difference with the adjacent first dust collection plates, and a second electrical connection portion is formed at one end of the plurality of second dust collection plates. A chamber that internally houses the first dust collection plate and the second dust collection plate and has an inlet for introducing air; and A baffle plate separates the dust collection space from the electrical connection space, the dust collection space being used to collect air introduced from the inlet in the chamber, and the first dust collection plate and the second dust collection plate being electrically connected in the electrical connection space.

7. The electrostatic precipitator according to claim 6, wherein, The chamber includes: A first chamber, which forms the electrical connection space, wherein one side of the first chamber is open; and A second chamber, which forms the dust collection space and is combined with the first chamber, wherein one side of the second chamber is open. The baffle plate is disposed between the first chamber and the second chamber.

8. The electrostatic precipitator according to claim 6, wherein, The first electrical connection portion and the second electrical connection portion are disposed in the electrical connection space, and The electrostatic precipitator further includes a positive pressure forming section, which supplies gas to the electrical connection space to form pressure.

9. The electrostatic precipitator according to claim 6, wherein, The first dust collection plate includes a first main board portion, which is disposed in the dust collection space, and its end is connected to the first electrical connection portion. The second dust collection plate includes a second main board portion, which is disposed in the dust collection space, and its end is connected to the second electrical connection portion. The first electrical connection portion extends from one side of one end of the first motherboard portion, and the width of the first electrical connection portion is smaller than the width of the first motherboard portion. The second electrical connection portion extends from one end of the second main board portion to the other side, and the width of the second electrical connection portion is smaller than the width of the second main board portion.

10. The electrostatic precipitator according to claim 9, further comprising: A first fixing part is disposed on one side within the electrical connection space and has a plurality of fixing slots spaced apart from each other. The first electrical connection part is inserted into the fixing slots to electrically connect the first dust collection plate. as well as The second fixing part is disposed on the other side within the electrical connection space and has a plurality of fixing slots spaced apart from each other. The second electrical connection part is inserted into the fixing slots to electrically connect the second dust collection plate.

11. The electrostatic precipitator according to claim 6, further comprising: A first fixing rod, which passes through the chamber and is fixed therethrough, is used to fix the plurality of first dust collection plates; as well as A second fixing rod, which passes through the chamber and is fixed therethrough, is used to secure the plurality of second dust collection plates. The fixing hole or fixing groove for fixing to the first fixing rod is formed at the first dust collection plate. The fixing hole or fixing groove for fixing to the second fixing rod is formed at the second dust collection plate.

12. The electrostatic precipitator according to claim 11, wherein, Each of the first fixing rod and the second fixing rod is formed as at least one or more. High voltage is applied to the plurality of first dust collection plates via a high voltage application part connected to one of the first fixing rods. One of the second fixing rods is grounded to ground the plurality of second dust collection plates.

13. The electrostatic precipitator according to claim 6, wherein, Each of the first and second dust collection plates is formed of a thin film layer of plastic material and a coating of carbon on the thin film layer.

14. The electrostatic precipitator according to claim 6, wherein, Each of the first and second dust collection plates is formed by a thin film layer of plastic material, a first coating layer coated with carbon on the thin film layer, and a second coating layer coated with plastic on the first coating layer. A portion of the first coating is not coated by the second coating and is exposed to the outside.

15. The electrostatic precipitator according to claim 14, wherein, The edges of the first coating that are exposed to the outside and not coated by the second coating are coated with an insulating material.

16. The electrostatic precipitator according to claim 1, wherein, The flow rate of the gas ejected from the high-pressure gas jet is 250 m / s or higher.

17. An air purification system for a subway station, comprising: The air supply unit draws outside air from the ground into the underground; An electrostatic precipitator receives polluted air from an underground space and outside air drawn in from the air supply unit, and purifies the polluted air and the outside air. An exhaust system that discharges the air from the underground space to the outside. The electrostatic precipitator includes: The dust collection section collects charged fine particles using electrostatic force. A high-pressure gas injection unit injects high-pressure gas from one side of the dust collection unit toward the charged fine particles in the dust collection unit; The suction unit, which draws in the fine particles separated from the dust collection unit by the high-pressure gas injection unit from the other side of the dust collection unit; and A charging unit, disposed on the front side of the dust collection unit, includes multiple ion generators with carbon fibers, wherein the multiple ion generators are spaced apart from each other at at least one fixed rod. The high-pressure gas injection unit includes an injection nozzle configured to inject the high-pressure gas. The suction section includes a hopper. The injection nozzle and the hopper are moved to a position opposite to each other. The spray nozzle is rotated 180° to face one of the dust collection section and the charging section. When the fine particles are charged, the fixing rod rotates, causing the carbon fiber to align with the direction in which the polluted air is introduced. When the injection nozzle rotates to face the charging unit, the fixing rod rotates, causing the carbon fiber to face the injection nozzle, so that the injection nozzle directly injects high-pressure gas onto the carbon fiber.

18. The air purification system according to claim 17, further comprising: An air supply damper is disposed at the air supply section and controls the flow rate of air flowing into the electrostatic precipitator; A recirculation damper is configured at the recirculation duct connecting the underground space and the electrostatic precipitator and controls the flow rate of air flowing into the electrostatic precipitator; as well as An exhaust damper is configured at the exhaust section and controls the flow rate of air discharged from the underground space to the outside.

19. The air purification system according to claim 17, wherein, The electrostatic precipitator also includes a charging unit that charges the fine particles. The charging unit is located at at least one of the following locations: the front side of the dust collection unit inside the electrostatic precipitator, the air supply unit, the interior of the recirculation pipe connecting the underground space to the electrostatic precipitator, or the entrance of the underground space to which the recirculation pipe is connected.

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