JP2012205974A - Electric dust collection device, and external air treatment device with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric dust collection device that has a low pressure loss, can maintain a high dust capturing efficiency, and allows easier assembly with a smaller amount of parts, in an electric dust collection device for collecting dust contained in gas such as air and for purifying the air.SOLUTION: In the electric dust collection device including in an air path: a charge portion for charging dust contained in a gas to be treated; a collection portion for collecting the charged dust; and a washer for washing an electrode disposed in the collection portion, the washer is disposed upstream of a dust collection electrode, and a reservoir for reserving water, a slit through which the water flows over the dust collection electrode, and a dust collection electrode support for supporting the dust collection electrode are provided. With this arrangement, a water membrane can be formed without fail on an electrode surface with a structure of a low pressure loss, a high dust capturing efficiency can be maintained by keeping the electrode surface clean, and easier assembly is allowed with a smaller number of part items.

Description

  The present invention relates to an electric dust collection device that collects and purifies dust contained in a gas such as air, and an outside air purification device using the same.

  Conventionally, this type of electrostatic precipitator has ionized air molecules mainly by corona discharge, and has a charging unit that charges dust contained in the outside air and an electrode plate, and alternately applies different voltages to generate an electric field. There is known a device that includes a dust collecting unit that collects dust charged by the charging unit by using a Coulomb force and that electrically collects dust in the gas to be processed.

  In this type of electrostatic dust collection device, dust collection performance gradually deteriorates due to dust adhering to the respective electrodes of the charging unit and the dust collection unit. In order to maintain the dust collection performance, a cleaning means for washing away dust adhering to the electrode surface and a guide plate for flowing the cleaning liquid sprayed from the washing means to the electrode surface are known (for example, , See Patent Document 1).

  Hereinafter, the electric dust collection device will be described with reference to FIG.

  As shown in FIG. 11, the electrostatic dust collection device 101 includes a casing 102, an air passage 103, and a blower 104. The air passage 103 includes a charging unit 105, a dust collecting unit 106, a spraying unit 107, and a guide plate 108. The guide plate 108 is provided with a flow hole 109 for allowing the gas to be processed to pass therethrough. When the gas to be processed flows into the electrostatic dust collecting device 101, the gas to be processed flows into the charging unit 105 through the circulation hole 109 provided in the guide plate 108, and the dust in the gas to be processed is charged. The gas to be treated containing the charged dust continues to flow into the dust collecting unit 106, and the charged dust is attracted to the electrode on the dust collecting side by Coulomb force to be captured and removed. At the time of cleaning, water is sprayed from the spraying section 107, whereby water flows to the electrode surface through the guide plate 108, and the attached dust is washed away.

JP 2009-131895 A

  In such a conventional electrostatic precipitator, a water film is formed on the surface of the electrode by flowing water through the surface of the electrode, but the gas to be treated is applied to the guide plate provided in the air passage. Since the structure flows into the charging part through the provided through holes, there is a problem that the pressure loss is large. In addition, as a means for cleaning the electrode surface, since the nozzle and the guide plate are provided separately from the members constituting the charging unit and the dust collecting unit, there is a problem that the number of parts is large and the assembly becomes complicated. .

  Therefore, the present invention solves the above-mentioned conventional problems, and maintains a high dust collection efficiency by forming a water film on the electrode surface with a structure with low pressure loss and keeping the electrode surface clean. Another object of the present invention is to provide an electrostatic precipitator that reduces the number of parts and reduces the labor of assembly, and an outside air treatment apparatus using the same.

  In order to achieve this object, according to the present invention, a charging unit for charging dust in the gas to be processed, a charging electrode and a dust collecting electrode are alternately stacked in an air passage through which the gas to be processed flows. An electrostatic dust collection device comprising: a dust collection unit that collects dust charged by the charging unit on the dust collection electrode; and a cleaning unit that cleans the dust collected on the dust collection electrode The cleaning means is disposed above the dust collection electrode, and includes a reservoir for storing water, a slit for flowing water on the dust collection electrode, and a dust collection electrode for supporting the dust collection electrode An electrostatic precipitator device comprising a support member, thereby achieving an intended purpose.

  According to the present invention, in the air passage through which the gas to be processed flows, the charging unit for charging the dust in the gas to be processed, the charging electrode and the dust collecting electrode are alternately stacked, and the first charging unit is charged. In the electrostatic precipitator including a dust collecting unit that collects dust on the dust collecting electrode and a cleaning unit for cleaning the dust collected on the dust collecting electrode, the cleaning unit includes the collecting unit. It is arranged above the dust electrode, and has a storage part for storing water, a slit for flowing water on the dust collection electrode, and a dust collection electrode support member for supporting the dust collection electrode. As a result, a water film is reliably formed on the electrode surface with a structure with low pressure loss, maintaining high dust collection efficiency by keeping the electrode surface clean, and reducing the number of parts and assembly work. It is possible to provide a reduced electric dust collection device. That.

Schematic diagram of the electrostatic dust collection device of Embodiment 1 of the present invention Front view of the charging part of the electrostatic dust collection device Perspective view of the charging unit provided in the electric dust collection device The block diagram which shows the cross section of the electrification part with which the same electric dust collection device is equipped Perspective view of the dust collection part provided in the electric dust collection device The block diagram which shows the cross section seen from the front of the dust collection part with which the electric dust collection device was equipped The block diagram which shows the cross section seen from the side of the dust collection part with which the electric dust collection device was equipped Plan view of the cleaning means provided for the electrostatic dust collection device as seen from directly below The block diagram which shows the cross section of the washing | cleaning means with which the electric dust collection device was equipped Configuration diagram of outside air processing apparatus of Embodiment 2 Configuration diagram of conventional electrostatic precipitator

  According to the first aspect of the present invention, a charging portion for charging dust in the gas to be processed, a charging electrode and a dust collecting electrode are alternately stacked in an air passage through which the gas to be processed flows. In an electric dust collection device comprising: a dust collection unit that collects dust charged by the charging unit on the dust collection electrode; and a cleaning unit that cleans the dust collected on the dust collection electrode. The cleaning means is disposed on the upper side of the dust collection electrode, and includes a reservoir for storing water, a slit for flowing water on the dust collection electrode, and a dust collection electrode support member that supports the dust collection electrode An electric dust collecting device characterized by comprising:

  When water is supplied to the storage part of the cleaning unit disposed above the dust collecting electrode, water flows down from the slit provided in the cleaning unit due to gravity, and a water film is formed on the surface of the dust collecting electrode. As a result, dust accumulated on the dust collection electrode is removed, the electrode surface can be kept clean, and high dust collection efficiency can be maintained. At this time, since the inflowing gas does not pass through the cleaning means, there is almost no pressure loss due to the arrangement of the cleaning means, and a water film can be formed on the electrode surface.

  In addition, the dust collecting electrode support member that supports the dust collecting electrode is integrated in the cleaning means, so that the dust collecting electrode can be supported without providing a separate member, and the number of parts is reduced and the assembly work is reduced. A reduced electric dust collection device can be provided.

  The invention according to claim 2 of the present invention is the electrostatic dust collection device according to claim 1, wherein the dust collection electrode support member is constituted by a protrusion provided in a slit provided in the cleaning means. is there.

  By providing the protrusion on the slit, a space having a width narrower than that of the slit is formed only in a part of the slit. By making the width of this space substantially equal to the thickness of the dust collecting electrode, the dust collecting electrode can be supported by being sandwiched between the protrusions.

  The invention according to claim 3 of the present invention is characterized in that the lower end of the slit provided in the cleaning means is provided with an inclination that extends downward from above along the depth direction of the dust collecting electrode. The electric dust collection device according to 1 or 2.

  Thereby, when water flows from the slit onto the dust collecting electrode, it becomes possible to flow the water along the inclination, and the range in which the water film is formed can be expanded.

  The invention according to claim 4 of the present invention is the electrostatic dust collection device according to any one of claims 1 to 3, wherein the surface of the dust collection electrode is provided with hydrophilicity.

  When the dust collecting electrode is cleaned using the cleaning means, hydrophilicity is imparted to the surface of the dust collecting electrode, whereby a uniform water film is formed on the electrode surface. Thereby, the dust collected on the electrode is easily washed away, the electrode can be kept clean, and high dust collection efficiency can be maintained.

  The invention according to claim 5 of the present invention is the electrostatic precipitator according to any one of claims 1 to 4, wherein a part of the surface of the charged electrode is covered with an insulator.

  If the conductive material is exposed on both the charged electrode and the dust collecting electrode at the part where the charged electrode and the dust collecting electrode face each other in the dust collecting part, water is applied to the surface of the dust collecting electrode while applying a voltage between the electrodes. If an attempt is made to form a film, when the electrode interval is reduced or the water supplied to the electrode surface from the cleaning means splashes, the electrode interval may be temporarily reduced by water and spark may occur. . By covering a part of the surface of the charged electrode with an insulator, it is possible to prevent a current from flowing between the electrodes and to prevent occurrence of a spark.

  The invention described in claim 6 of the present invention is characterized in that the voltage supply member for applying a voltage to the charged electrode and the contact point with the charged electrode are arranged at a position higher than the lower end of the slit provided in the cleaning means. An electric dust collecting device according to any one of claims 1 to 5.

  In order to reliably apply a voltage to the charged electrode, it is desirable that the conductive material is in contact with the contact between the voltage supply member and the charged electrode, but when the water supplied from the cleaning means is applied to the contact, There is a possibility that a spark is generated or that the voltage supply member and the dust collecting electrode are electrically connected to each other through the water to cause a short circuit. By disposing the contact point between the voltage supply member and the charging electrode at a position higher than the lower end of the slit provided in the cleaning unit, water supplied from the cleaning unit is prevented from touching the contact point, and generation of a spark or short circuit is prevented. Can be prevented.

  The invention according to claim 7 of the present invention includes a main body case having a suction port for sucking outside air and a blow-out port for blowing out the treated outside air into the room, and an air passage connecting the suction port and the blow-out port in the main body case. An outside air treatment apparatus comprising: the dust collecting means and the air blowing means provided in the container, and the electric dust collecting device according to claim 1 as the dust collecting means.

  Accordingly, it is possible to provide an outside air treatment apparatus that can maintain a high dust collection efficiency by forming a water film on the electrode surface with a structure having a low pressure loss and keeping the electrode surface in a clean state.

  The invention according to claim 8 of the present invention is characterized in that a water tank is provided in the main body case, the water tank and the cleaning means are connected by a pump, and a water circulation type is used. It is a processing device.

  Thereby, the water used at the time of washing | cleaning can be circulated and reused, and the external air processing apparatus with a small amount of used water and low operating cost can be provided.

  The invention according to claim 9 of the present invention is the outside air processing apparatus according to claim 7 or 8, wherein a dust removing filter is provided between the dust collecting means and the water tank.

  Since the water used at the time of cleaning is contaminated with dust, it is necessary to remove the dust and drain or recycle. By providing the dust removal filter, dust can be removed from dirty water, and the water can be cleaned and drained or recycled.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram of an electrostatic dust collection device according to Embodiment 1 of the present invention, FIG. 2 is a front view of a charging unit provided in the electrostatic dust collection device, and FIG. 3 is a diagram of a charging unit provided in the electrostatic dust collection device. FIG. 4 is a configuration diagram showing a cross section of a charging unit provided in the electric dust collection device, FIG. 5 is a perspective view of a dust collection unit provided in the electric dust collection device, and FIG. FIG. 7 is a configuration diagram showing a cross section viewed from the side of the dust collection section provided in the electric dust collection device, and FIG. 8 is a configuration diagram showing a cross section viewed from the side of the dust collection section. FIG. 9 is a structural view showing a cross section of the cleaning means provided in the electrostatic dust collecting device.

  The configuration of the electric dust collection device of the first embodiment will be described.

  As shown in FIG. 1, the electrostatic dust collecting device 1 includes a charging unit 3 that charges dust in the gas to be processed in an air passage 2 through which the gas to be processed flows, and dust charged by the charging unit 3. A dust collecting section 4 for collecting and a cleaning means 5 for cleaning the dust collected by the dust collecting section 4 are provided. The cleaning means 5 is disposed above the dust collection unit 4.

  As shown in FIGS. 2 and 3, the charging unit 3 includes a discharge electrode 6 and a ground electrode 7 that is an electrode plate at a position separated from the discharge electrode 6 by a predetermined distance (15 mm in the present embodiment). . The discharge electrode 6 is fixed to the discharge electrode support member 8 by welding or caulking. The ground electrode 7 is fixed to the frame body 9, and the discharge electrode 6 is electrically floated by the insulator 10 in order to electrically insulate the frame body 9 from the discharge electrode 6.

  In the present embodiment, the discharge electrode 6 is a needle-shaped one made of stainless steel with a sharp tip. The discharge electrode 6 has conventionally various forms, for example, a wire-like metal wire having a diameter of about 0.05 mm to φ0.3 mm, or a sheet metal punched into a sawtooth shape, and any of them may be used.

  In order to generate corona discharge, a DC high voltage of −7 kV is applied to the discharge electrode 6. The applied voltage is an example, and the polarity may be either negative or positive at 3 to 30 kV. The applied voltage can be freely selected by the designer from the required collection performance, the size of the electrostatic precipitator, the cost applied to the high-voltage power supply, etc., but in this embodiment it is set to -7 kV so that all are well balanced.

  The frame 9 is connected to the ground, and a potential difference is generated between the ground electrode 7 and the discharge electrode 6 that are electrically connected to the frame 9. As a result, the electric field concentrates on the tip of the discharge electrode 6, air near the tip of the discharge electrode 6 to which a high voltage is applied causes dielectric breakdown, and corona discharge occurs. When the gas to be processed that has flowed into the charging unit 3 passes through here, the dust contained in the gas to be processed is charged to the same polarity as the voltage applied to the discharge electrode 6 (minus in the present embodiment).

  As shown in FIG. 4, the end portion of the ground electrode 7 that is located on the opposite side of the discharge electrode support member 8 that supports the discharge electrode 6 is sandwiched between the metal plates as the conductive member 11. By electrically connecting the metal plate to the frame body 9, it is possible to flow a corona discharge current generated on the surface of the ground electrode 7. In the present embodiment, an aluminum plate is used as the metal plate, but any material having conductivity may be used, and a metal such as stainless steel or a resin having conductivity may be used.

  A dust collecting unit 4 is disposed on the downstream side of the charging unit 3. As shown in FIG. 5 and FIG. 6, the dust collecting unit 4 includes a charging electrode 12 that applies a high voltage and a dust collecting electrode 13 that is opposed to the ground and alternately connected to the ground at regular intervals. . A cleaning means 5 is provided above the dust collection electrode 13.

  In the present embodiment, −8 kV is applied to the charging electrode 12, and the distance between the charging electrode 12 and the dust collection electrode 13 is 6 mm. As a result, an electric field is generated between the charged electrode 12 and the dust collecting electrode 13, and when the charged dust passes therethrough, a Coulomb force due to the electric field works, and the charged dust mainly on the dust collecting electrode 13. It is collected.

  In the present embodiment, the charging electrode 12 is an aluminum plate laminated with a PET film that is an insulator. The dust collecting electrode 13 is an aluminum electrode plate having a surface coated with a hydrophilic paint. It is necessary to connect the charging electrode 12 of the dust collecting portion so that a high voltage can be applied, and the dust collecting electrode 13 must be electrically connected to the ground. As described above, the method may be the same as that of the ground electrode 7 of the charging unit. However, in the present embodiment, each of the charging electrodes 12 or the dust collecting electrodes 13 is provided so as to have a simpler structure. A part is brought into contact with the voltage supply member 14 or the dust collecting electrode grounding member 18 to conduct. In addition, the charging electrode support member 15 is used to sandwich and support the charging electrode 12.

  As shown in FIG. 7, the voltage supply member 14 for applying a voltage to the charging electrode 12 and the contact point between the charging electrode 12 were arranged at a position higher than the lower end of the cleaning means 5. The surface of the charging electrode 12 is insulated or semiconductive, and the voltage supply member 14 and the contact point between the charging electrode 12 and the voltage supply member 14 are not exposed to water. Even if water accumulates, sparks can be prevented.

  As shown in FIG. 8, the cleaning means 5 includes a reservoir 16 for storing water and a slit 17 for flowing water on the dust collection electrode 13, and a dust collection electrode support member for sandwiching and supporting the dust collection electrode 13. 19 is provided. The slit 17 has a width, for example, 1.5 mm, in which a gap necessary for flowing water on the surface of the dust collecting electrode 13 to form a water film is provided. The dust collection electrode support member 19 is composed of a plurality of protrusions provided in the slit 17 and the height of the protrusions is 0.5 mm. In the present embodiment, the number of protrusions is three so that the dust collection electrode 13 can be fixed.

  When assembling the dust collecting unit 4, the charged electrode 12 is first fixed using the voltage supply member 14 and the charged electrode support member 15, and then the dust collecting unit 4 and the cleaning unit 5 are fixed, and then the cleaning unit. It is preferable that the dust collecting electrode 13 is sandwiched and fixed to the dust collecting electrode support member 19 provided in the slit 17 provided in the No. 5, and finally the dust collecting electrode grounding member 18 is assembled and fixed so that the assembly can be performed smoothly.

  As shown in FIG. 9, the lower end of the slit 17 is provided with an inclination 20 that extends from the upper side to the lower side along the depth direction of the dust collecting electrode 13 (a direction parallel to the gas flow).

  When water is supplied to the storage section 16 provided in the cleaning means 5, water flows down to the surface of the dust collection electrode 13 through the slit 17 due to gravity, and a water film is formed on the surface of the dust collection electrode 13.

  The operation of the electric dust collection device of the first embodiment will be described.

  A high DC voltage of −10 kV is applied to the discharge electrode 6 provided in the charging unit 3, and the ground electrode 7 and the frame body 9 are connected to the ground. Thereby, since a potential difference is generated between the discharge electrode 6 and the ground electrode 7, an electric field is concentrated on the tip of the discharge electrode 6, and air near the tip of the discharge electrode 6 to which a high voltage is applied causes dielectric breakdown. Corona discharge occurs. A DC high voltage of −8 kV is applied to the charging electrode 12 provided in the dust collecting unit 4, and the dust collecting electrode 13 is connected to the ground. As a result, an electric field is generated between the charging electrode 12 and the dust collecting electrode 13.

  When the blowing means (not shown) is driven and the gas to be processed flows into the electrostatic precipitator device 1, the dust contained in the gas to be processed is charged when passing through the charging unit 3. Subsequently, the gas to be treated containing the charged dust flows into the dust collecting unit 4. When passing through the dust collection unit 4, the Coulomb force due to the electric field works and the charged dust is collected on the dust collection electrode 13.

  When water is supplied to the cleaning means 5 by a water supply means (not shown), water accumulates in the storage portion 16 provided in the cleaning means 5, and water flows down to the surface of the dust collecting electrode 13 through the slit 17 due to gravity. A water film is formed on the surface of the dust collection electrode 13. At this time, the dust collected on the dust collecting electrode 13 is washed away and discharged together with water.

  The effect of the electric dust collection device of Embodiment 1 is demonstrated.

  By adopting the above configuration, a water film is formed on the surface of the dust collecting electrode 13 to remove dust accumulated on the dust collecting electrode 13, and the electrode surface can be kept clean, maintaining high dust collection efficiency. It becomes possible to do. Further, since the gas to be treated that flows into the apparatus does not pass through the cleaning means 5, there is almost no pressure loss due to the arrangement of the cleaning means 5, and a water film can be formed on the electrode surface.

  Further, since the dust collecting electrode support member 19 that supports the dust collecting electrode 13 is integrated in the cleaning means 5, the dust collecting electrode 13 can be supported without providing a separate member, and the number of parts can be reduced. It is possible to provide an electric dust collection device that reduces the labor of assembly.

  Further, in the present embodiment, the dust collecting electrode support member 19 is a protrusion provided on the slit 17 provided in the cleaning means 5. By providing the protrusions on the slit 17, a space narrower than the slit 17 is formed only in a part of the slit 17. By making the width of this space substantially equal to the thickness of the dust collection electrode 13, the dust collection electrode 13 can be supported by being sandwiched between the protrusions.

  In the present embodiment, the lower end of the slit 17 provided in the cleaning means 5 is provided with an inclination 20 that extends from the upper side to the lower side along the depth direction of the dust collecting electrode 13. Thereby, when water flows on the dust collection electrode 13 from the slit 17, it becomes possible to flow water along the inclination 20, and the range which forms a water film can be expanded.

  Moreover, in this Embodiment, the hydrophilic property was provided to the electrode surface by painting the hydrophilic coating material on the surface of the dust collection electrode 13. FIG. When cleaning the dust collecting electrode 13 using the cleaning means 5, by imparting hydrophilicity to the surface of the dust collecting electrode 13, a uniform water film is formed on the electrode surface. Thereby, the dust collected on the electrode is easily washed away, the electrode can be kept clean, and high dust collection efficiency can be maintained.

  Moreover, in this Embodiment, a part of surface of the charging electrode 12 was coat | covered with the PET film which is an insulator. In the part where the charged electrode 12 and the dust collecting electrode 13 of the dust collecting unit 4 face each other, when the conductive material is exposed to both the charging electrode 12 and the dust collecting electrode 13, the dust collecting is performed while applying a voltage between the electrodes. When an attempt is made to form a water film on the surface of the electrode 13, when the electrode interval is narrowed or the water supplied to the electrode surface from the cleaning means 5 is splashed, the electrode interval is temporarily reduced by water, and a spark is generated. May occur. By covering a part of the surface of the charged electrode 12 with an insulator, it is possible to prevent a current from flowing between the electrodes and to prevent the occurrence of sparks.

  In the present embodiment, the voltage supply member 14 for applying a voltage to the charging electrode 12 and the contact point between the charging electrode 12 are arranged at a position higher than the lower end of the slit 17 provided in the cleaning means 5. In order to apply a voltage to the charged electrode 12 with certainty, it is desirable that the conductive material is in contact with the contact point between the voltage supply member 14 and the charged electrode 12, but the water supplied from the cleaning means 5 is at the contact point. If it is applied, there is a possibility that a spark is generated or that the voltage supply member 14 and the dust collecting electrode 13 are electrically connected to each other and short-circuited through water. By disposing the contact point between the voltage supply member 14 and the charging electrode 12 at a position higher than the lower end of the slit 17 provided in the cleaning unit 5, the water supplied from the cleaning unit 5 is prevented from touching the contact point, and the spark. Generation and short circuit can be prevented.

  In the present embodiment, the discharge electrode 6 is at a high voltage and the frame 9 is at ground, but the same effect can be obtained even if it is reversed.

  In the present embodiment, the voltage applied to the charging electrode 12 is −8 kV, the voltage applied to the dust collecting electrode 13 is 0 kV (ie, ground), and the distance between the charging electrode 12 and the dust collecting electrode 13 is 6 mm. However, the present invention is not limited to this, and any value that can achieve a desired dust collection performance may be used.

  In the present embodiment, the voltage supply member 14 and the dust collecting electrode grounding member 18 are used as a structure for applying a high voltage to the charging electrode 12 and 0 kV (that is, grounding) to the dust collecting electrode 13. Although the charged electrode support member 15 is used as a structure for supporting the structure, the structure is not limited to this, and any structure may be used as long as it satisfies the requirements.

  In the present embodiment, the charging electrode 12 is an electrode plate obtained by laminating an aluminum plate with a film. However, the present invention is not limited to this, and the electrode plate is configured to obtain the same effect as the present embodiment. I just need it. For example, the electrode plate can be manufactured using ceramics, resin, or the like that is semiconductive so that the surface resistivity is on the order of 10 7 to 12 Ω / □.

  In the present embodiment, the dust collecting electrode 13 is an aluminum electrode plate having a surface coated with a hydrophilic paint. However, the present invention is not limited to this and may be an electrode plate having both hydrophilicity and conductivity. That's fine. For example, an electrode plate in which hydrophilicity is imparted to the surface of a metal plate such as stainless steel, or an electrode plate in which hydrophilicity is imparted to the surface of a conductive resin plate can be used.

  In the present embodiment, the width of the slit 17 is 1.5 mm. However, the present invention is not limited to this, and the configuration allows the water to flow so that a water film can be formed on the surface of the dust collecting electrode 13. I just need it.

  In the present embodiment, the dust collection electrode support member 19 is constituted by three protrusions, but is not limited to this, and the dust collection electrode 13 can be fixed and integrated with the cleaning means 5. I just need it. For example, the dust collection electrode support member 19 may be a leaf spring shape.

  In this embodiment, the liquid used for cleaning is water. However, in order to enhance the ability to remove dust accumulated on the dust collecting electrode 13, a cleaning liquid mixed with a detergent may be used.

(Embodiment 2)
Embodiment 2 of the present invention will be described below with reference to the drawings. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 10 is a configuration diagram of an outside air processing apparatus according to Embodiment 2 of the present invention.

  The structure of the outside air processing apparatus of Embodiment 2 is demonstrated.

  As shown in FIG. 10, the outside air processing device 21 includes a body case 22 having a suction port 23 for sucking outside air, a blowout port 24 for blowing the treated outside air into the room, and the suction port 23 and the blower in the body case 22. Dust collecting means 26 and air blowing means 27 provided in an air passage 25 connecting the outlet 24 are provided. As the dust collecting means 26, the electrostatic dust collecting device 1 according to the first embodiment of the present invention is mounted.

  A water tank 28 is provided in the main body case 22, and the water tank 28 and the cleaning means 5 provided in the dust collecting means 26 are connected by a pump 29. A dust removing filter 30 is provided between the dust collecting means 26 and the water tank 28. The dust removal filter 30 is made of a stainless steel mesh.

  The basic operation and effect of the second embodiment are the same as those of the first embodiment.

  When the air blowing means 27 is driven and the outside air flows into the outside air processing device 21 from the suction port 23, dust contained in the outside air is collected by the dust collecting means 26 provided in the air passage 25. The outside air that has been cleaned by removing dust is supplied into the room through the air outlet 24.

  When cleaning the dust collected by the dust collecting means 26, the pump 29 is driven, the water accumulated in the water tank 28 is supplied to the dust collecting means 26, and the dust accumulated on the dust collecting means is washed away. The water containing dust flows downward due to gravity, and when passing through the dust removal filter 30, the dust is removed from the water, and the clean water returns to the water tank 28 and circulates through the pump 29 again.

  With the above configuration, it is possible to provide the outside air treatment device 21 that can maintain high dust collection efficiency by forming a water film on the electrode surface with a structure having low pressure loss and keeping the electrode surface in a clean state.

  Moreover, the water circulation type allows the water used at the time of cleaning to be circulated and reused, and the outside air treatment device 21 with a small amount of water used and low operating costs can be provided.

  Further, since the dust removing filter is provided, the dust can be removed from the dirty water, and the water can be cleaned and drained or recycled.

  In this embodiment, the water tank 28 is provided, and the water tank 28 and the cleaning means 5 provided in the dust collecting means 26 are connected by the pump 29 so that the water can be circulated. It is not limited, and any configuration that can supply water to the dust collecting means 26 may be used. For example, in an environment where water can be used abundantly, water may be directly connected to the dust collecting means 26 and the water discharged from the dust collecting means 26 may be drained without being stored in the water tank 28.

  In this embodiment, the dust removing filter 30 is provided between the dust collecting means 26 and the water tank 28. However, the present invention is not limited to this, and is included in the water after flowing through the dust collecting means 26. It may be arranged in any of the paths through which water is circulated so that the dust that is generated can be removed. The dust removing filter 30 is made of stainless steel mesh, but is not limited to this, and any filter that can remove dust contained in water may be used.

  In the present embodiment, the pump 29 is arranged outside the main body case 22, but the present invention is not limited to this, and any configuration that can circulate water is acceptable. For example, water may be circulated by providing a submersible pump in the water tank 28.

  Further, the water tank 28 may be subjected to antibacterial treatment. If water is stored in the water tank 28 for a long period of time, if the dust collected by the dust collecting means 26 and washed away contains bacteria or the like, those bacteria will propagate in the water tank 28 and will not grow. There is a risk of hygiene. By subjecting the water tank 28 to antibacterial treatment, it is possible to prevent the growth of bacteria and the like and to prevent unsanitary conditions. As antibacterial treatment, an inorganic antibacterial agent such as silver-zeolite or silver-zirconium phosphate, or an organic antibacterial agent such as a cationic surfactant is applied to the surface of the water tank 28. A technique such as plating can be used.

  High dust collection efficiency by forming a water film on the electrode surface with a structure with low pressure loss and keeping the electrode surface in a clean state by the electric dust collection device according to the present invention and the outside air treatment device using the same. In addition, it is possible to provide an electric dust collection device that reduces the number of parts and reduce the labor of assembly, and an outside air treatment device that can maintain high dust collection efficiency. It is useful as a blower device.

DESCRIPTION OF SYMBOLS 1 Electric dust collection device 2 Air path 3 Charging part 4 Dust collection part 5 Cleaning means 6 Discharge electrode 7 Ground electrode 8 Discharge electrode support member 9 Frame 10 Insulator 11 Conductive member 12 Charge electrode 13 Dust collection electrode 14 Voltage supply member 15 Charge electrode support member 16 Reservoir 17 Slit 18 Dust collection electrode grounding member 19 Dust collection electrode support member 20 Inclination 21 Outside air treatment device 22 Body case 23 Suction port 24 Blowout port 25 Air passage 26 Dust collection unit 27 Blower unit 28 Water tank 29 Pump 30 Dust removal filter 101 Electric dust collecting device 102 Casing 103 Air passage 104 Air blowing means 105 Charging part 106 Dust collecting part 107 Spraying part 108 Guide plate 109 Flow hole

Claims (9)

In the air passage through which the gas to be treated flows,
A charging unit for charging dust in the gas to be treated;
A dust collecting unit that alternately stacks charged electrodes and dust collecting electrodes, and collects dust charged in the first charging unit on the dust collecting electrode;
In the electric dust collection device comprising a cleaning means for cleaning the dust collected on the dust collection electrode,
The cleaning means includes
The dust collecting electrode is disposed above the dust collecting electrode, and includes a reservoir for storing water, a slit for flowing water on the dust collecting electrode, and a dust collecting electrode support member for supporting the dust collecting electrode. Electric dust collection device characterized by. 2. The electrostatic dust collecting device according to claim 1, wherein the dust collecting electrode support member is constituted by a protrusion provided in a slit provided in the cleaning means. The electrostatic dust collection device according to claim 1 or 2, wherein an inclination that extends downward from above along the depth direction of the dust collection electrode is provided at the lower end of the slit provided in the cleaning means. 4. The electrostatic dust collecting device according to claim 1, wherein hydrophilicity is imparted to the surface of the dust collecting electrode. The electrostatic precipitator according to any one of claims 1 to 4, wherein a part of the surface of the charged electrode is covered with an insulator. The voltage supply member for applying a voltage to the charging electrode and the contact point with the charging electrode are arranged at a position higher than the lower end of the slit provided in the cleaning means. Electric dust collection device. A body case having a suction port for sucking in outside air and a blow-out port for blowing out the treated outside air into the room;
A dust collecting means and an air blowing means provided in an air passage connecting the suction port and the air outlet in the main body case are provided, and the electric dust collecting device according to any one of claims 1 to 6 is provided as the dust collecting means. An outside air processing device characterized by that. 8. The outside air processing apparatus according to claim 7, wherein a water tank is provided in the main body case, and the water tank and the cleaning means are connected by a pump to be a water circulation type. The outside air processing apparatus according to claim 7 or 8, further comprising a dust removing filter between the dust collecting means and the water tank.

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