JP2011056403A - Electric precipitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain high dust collecting efficiency even with a crosslinked structure for improving a maintainability for an electric precipitator collecting dust in the air. <P>SOLUTION: The dust collecting part 1 of the electric precipitator alternately includes a high-voltage electrode 2 and a dust collecting electrode 3. The high-voltage electrode 2 is constituted of a conductor 4 and a covering film 5 comprising of a semi-conductive material, and possesses a projection 6 on the surface. The high-voltage electrode 2 is designed slidable in a length direction. In maintenance, when the high-voltage electrode 2 is slided, the projection 6 slides on the surface of the collecting electrode 3 to scrape off the deposited dust. By this constitution, the dust is eliminated in a simple operation, thus the maintainability being improved. Also, in such a constitution of the high-voltage electrode 2, even when the voltage is applied for a long period of time, the potential between the high-voltage electrode 2 and the collecting electrode 3 is not reduced. Hence, even when the crosslinked structure for improving maintainability is possessed, the electric precipitator maintaining high dust collecting efficiency can be provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric dust collector that collects dust in the air.

  Generally, an electrostatic precipitator is composed of a charging unit that generates corona discharge between electrodes and charges the dust, and a dust collecting unit that attaches the dust charged by the charging unit to the dust collecting plate with Coulomb force. The

  If the dust collector is not cleaned regularly, dust may accumulate, resulting in performance degradation, sound generation, ozone generation, dust ignition, etc. Dust adhering to the plate is periodically removed by mechanical impact such as hammering. For consumer use, for example, the dust collecting part is removed, washed with water, dried and reused.

  It is troublesome for a user to perform such maintenance regularly, and an electrostatic precipitator that improves maintenance and reduces the burden on the user has been proposed (see, for example, Patent Document 1).

  Hereinafter, the electric dust collector will be described with reference to FIGS. 6 and 7. FIG. 6 is a perspective view showing a dust collecting portion of a conventional electric dust collector, and FIG. 7 is a top view thereof.

  The dust collector 101 of the electric dust collector has a structure in which long plate-like high-voltage electrodes 102 and dust-collecting electrodes 103 are alternately arranged. The high voltage electrode 102 has an insulating coating on the entire periphery, and is provided with insulating protrusions 104 on both sides. The insulating protrusions 104 extend in a direction parallel to the air flow, and a plurality of insulating protrusions 104 are provided at regular intervals along a direction perpendicular to the air protrusions 104, and the protruding ends are in contact with the dust collection electrode 103. The high-voltage electrode 102 or the dust collecting electrode 103 can slide in the longitudinal direction, and dust accumulated on the dust collecting electrode 103 can be scraped off by the operation. Thereby, dust can be removed by a simple operation, and the burden on the user can be reduced.

Japanese Patent No. 3440403

  The conventional electrostatic precipitator has a structure in which the high-voltage electrode 102 is covered with an insulator, and the high-voltage electrode 102 and the dust-collecting electrode 103 are cross-linked by insulating protrusions 104. In such a structure, when a voltage is continuously applied to the high-voltage electrode 102 for a long period of time, the electric charge appearing on the surface of the insulator gradually disappears by moving to the dust collection electrode 103 through the bridging portion, etc. The potential difference between the electrode 102 and the dust collection electrode 103 decreases. As a result, since the strength of the electric field generated between the electrodes is reduced, there is a problem that the dust collection efficiency is lowered.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide an electric dust collector that can maintain high dust collection efficiency even if it has a cross-linking structure for improving maintainability. .

  In order to achieve this object, the present invention provides an electrostatic precipitator including a dust collecting portion having a configuration in which plate-like high-voltage electrodes having protrusions and plate-like dust collecting electrodes are alternately arranged. The high-voltage electrode is a conductor coated with a semiconductive material, and the protrusions are made of an insulating material or a semiconductive material, thereby achieving the intended purpose. is there.

  The present invention is also directed to an electrostatic precipitator including a dust collecting portion having a configuration in which plate-like high-voltage electrodes having protrusions and plate-like dust collecting electrodes are alternately arranged, wherein the high-voltage electrode is semiconductive. The protrusion is made of a material, and the protrusion is made of an insulating material or a semiconductive material, thereby achieving the intended purpose.

  According to the present invention, in an electrostatic precipitator including a dust collecting portion having a configuration in which plate-like high-voltage electrodes having protrusions and plate-like dust collecting electrodes are alternately arranged, the high-voltage electrode is semiconductive. The conductor is covered with a material, and the protrusion is made of an insulating material or a semiconductive material. Accordingly, when the high voltage electrode or the dust collecting electrode is slid, the protrusion provided on the high voltage electrode comes into contact with the dust accumulated on the dust collecting electrode, and the dust is scraped off. Therefore, dust can be removed with a simple operation, and the burden on the user during maintenance can be reduced. In addition, since the semiconductive material conducts electricity slightly, even if an environment where the charge on the surface of the high-voltage electrode disappears, it can be slowly supplied from the conductor to the electrode surface, and a voltage can be applied for a long time. However, the potential difference with the dust collecting electrode does not decrease. Therefore, even if it has a bridge structure for improving maintainability, it is possible to provide an electric dust collector that can maintain high dust collection efficiency.

  Further, according to the present invention, since the high-voltage electrode is made of a semiconductive material, the semiconductive material slightly conducts electricity, so even if an environment where the charge on the surface of the high-voltage electrode disappears occurs, Electric charges can be gently supplied to the electrode surface, and the potential difference with the dust collecting electrode does not decrease even when a voltage is applied for a long period of time. Therefore, even if it has a bridge structure for improving maintainability, it is possible to provide an electric dust collector that can maintain high dust collection efficiency.

The perspective view which shows the dust collection part of the electric dust collector of Embodiment 1 of this invention Top view The perspective view which shows the dust collection part of the electric dust collector of Embodiment 2 of this invention Top view The schematic diagram which shows the structure of the electric dust collector of Embodiment 3 of this invention. The perspective view which shows the dust collection part of the conventional electric dust collector Top view

  The invention according to claim 1 of the present invention is an electric dust collector including a dust collecting portion having a configuration in which plate-like high-voltage electrodes provided with protrusions and plate-like dust collecting electrodes are alternately arranged. In the electrostatic precipitator, the high-voltage electrode is a conductor covered with a semiconductive material, and the protrusion is made of an insulating material or a semiconductive material.

  First, the operation and action of the device will be described.

  During dust collection operation, air containing dust is circulated through the electric dust collector. Corona discharge is generated in the charging section upstream of the air flow to charge the dust in the air. In the downstream dust collecting portion, an electric field is generated between the high voltage electrode and the dust collecting electrode, and the charged dust is attached to the electrode by Coulomb force. When the high-voltage electrode or the dust collecting electrode is slid during maintenance, the protrusions provided on the high-voltage electrode come into contact with the dust accumulated on the dust collecting electrode, and the dust is scraped off.

  Next, effects of the present invention will be described.

  With this configuration, dust can be removed with a simple operation, and the burden on the user during maintenance can be reduced. In addition, since the high-voltage electrode is a conductor covered with a semiconductive material, the potential difference from the dust collection electrode does not decrease even when a voltage is applied for a long time. This mechanism is considered as follows.

  In the case of covering with an insulator, when a voltage is applied to the conductor, dielectric polarization occurs in the insulator, and charges appear on the surface. At this time, the charge on the surface of the insulator may be lost due to, for example, electrical connection between the surface of the insulator and the grounded dust collecting electrode due to adhesion of dust. Once the charge on the surface of the insulator disappears, the charge cannot move inside the insulator even if a voltage is continuously applied to the conductor, so that the charge cannot be supplied to the surface. When coated with a semiconductive material, the semiconductive material conducts electricity slightly, so even if an environment where the surface charge disappears can occur, it can slowly supply charge from the conductor to the electrode surface, It is considered that the potential difference between the electrodes does not decrease.

  Therefore, even if it has a bridge structure for improving maintainability, it is possible to provide an electric dust collector that can maintain high dust collection efficiency.

  The invention according to claim 2 of the present invention is an electric dust collector including a dust collecting portion having a configuration in which plate-like high-voltage electrodes having protrusions and plate-like dust collecting electrodes are alternately arranged. In the electrostatic precipitator, the high-voltage electrode is made of a semiconductive material, and the protrusion is made of an insulating material or a semiconductive material.

  Since the basic operation, action, and effect of the apparatus are the same as those of the first aspect of the invention, different points will be described.

  Since the high-voltage electrode is made of a semiconductive material, the potential difference with the dust collecting electrode does not decrease even when a voltage is applied for a long time. This is similar to the case where the conductor is covered with a semiconductive material. Since the semiconductive material conducts a little electricity, even if an environment where the surface charge disappears occurs, the electric charge is gently supplied to the electrode surface. It is thought that it is because it can do. Therefore, even if it has a bridge structure for improving maintainability, it is possible to provide an electric dust collector that can maintain high dust collection efficiency.

  According to a third aspect of the present invention, the high-voltage electrode and the dust collecting electrode are made of a common electrode having the same structure, and the common electrode is a conductor covered with a semiconductive material, and is insulated from the common electrode. A protrusion made of a conductive material or a semiconductive material, a power supply portion for applying a voltage to the conductor at one end of the common electrode, and the common electrode stacked so that the power supply portions are alternately opposed to each other. The electrostatic precipitator according to claim 1.

  Thereby, since a dust collection part can be comprised by one type of electrode, manufacturing cost can be reduced.

  The invention according to claim 4 of the present invention is characterized in that a plurality of protrusions are provided on the surface of the high-voltage electrode at regular intervals along the air flow direction, and the protrusions are in contact with the dust collecting electrode. Item 3. The electric dust collector according to Item 1 or 2.

  As a result, the protrusion can slide over a wide area on the surface of the dust collecting electrode, and dust accumulated on the electrode can be effectively scraped off.

  The invention according to claim 5 of the present invention is characterized in that a plurality of protrusions are provided on the surface of the shared electrode at regular intervals along the air flow direction, and the protruding ends are in contact with the adjacent shared electrode. It is an electric dust collector of Claim 3.

  As a result, the protrusion can slide over a wide area of the common electrode surface, and dust accumulated on the electrode can be effectively scraped off.

  The invention according to claim 6 of the present invention is characterized in that the tip of the protrusion is widened so as to increase the contact area with the dust collecting electrode or the common electrode. It is an electric dust collector of description.

  If the protrusion tip is sharp, the electrode surface may be damaged when the electrode surface is slid, or the protrusion itself may be worn. Further, when the stacked electrodes are supported by the protrusions using the protrusions as spacers, if the protrusions are sharp, the pressure applied to the protrusions increases, which increases the risk of damage to the electrodes and protrusions, and at the same time makes the sliding operation difficult. Therefore, it is preferable that the protruding end of the protrusion is widened so that the contact area with the electrode becomes larger.

  The invention according to claim 7 of the present invention is characterized in that the entire projection or the tip is a sliding material having wear resistance and good sliding properties. Electric dust collector.

  If the protrusion slides on the electrode surface, the electrode surface may be damaged or the protrusion itself may be worn. By using a sliding material having wear resistance and good slidability for the entire protrusion or the protrusion end, damage to the electrode and protrusion can be prevented, and at the same time, the sliding operation can be facilitated. As the sliding material, fluorine resin, ultra high molecular weight high density polyethylene, polyacetal, nylon resin and the like are known, and fluorine resin and ultra high molecular weight high density polyethylene are particularly excellent in wear resistance. At present, many materials including these have been improved, developed and proposed.

  The invention according to claim 8 of the present invention is characterized in that the surface resistivity of the coating film, the high voltage electrode, or the protrusion made of a semiconductive material is on the order of 10 7 to 12th power Ω / □. An electric dust collector according to any one of claims 1 to 7.

  Generally, in the dust collection part of an electrostatic precipitator, for example, when dust adheres to and accumulates on the electrode surface and the distance between the electrodes is locally reduced, a spark may occur. This is caused by the electric charge applied to the electrodes jumping over the air gap and moving rapidly to the opposite electrode.

  Here, if the surface resistivity of the electrode is 10 7 Ω / □ or more, the movement of charges on the electrode surface can be restricted, and sparking can be prevented. In addition, even when the protrusions are made of a semiconductive material and cross-link between the electrodes, the movement of electric charges is suppressed even when they are in contact with each other, so that no spark is generated and an electric field can be generated.

  When the entire electrode is made of a semiconductive material, an electric field is applied between the electrodes as long as the surface resistivity is such that a charge is applied to the electrode surface from a high voltage power source, that is, a surface resistivity of 10 12 Ω / □ or less. Can be generated.

  Also, if the surface resistivity is less than 10 12 Ω / □ order, the charge moves slightly, so even if an environment where the charge on the electrode surface disappears, the charge is slowly supplied from the power supply to the electrode surface. It is considered that the potential difference between the electrodes does not decrease.

  Therefore, by setting the surface resistivity of the coating film made of a semiconductive material, high-voltage electrode, or protrusion to the order of 10 to the 12th power Ω / □, an electric field is generated and dust is captured while preventing sparks. In addition to collecting, it is possible to prevent a decrease in dust collection efficiency.

  According to a ninth aspect of the present invention, the semiconductive material is a resin in which a block copolymer in which a polymer (a) and a hydrophilic polymer are alternately arranged is added to a polymer (a) as a main component. An electrostatic precipitator according to any one of claims 1 to 8.

  For example, when polyolefin such as polypropylene or polyethylene is used as the main polymer (a), a block copolymer in which polyolefin blocks and hydrophilic polymer blocks are alternately repeated is used as an additive for imparting semiconductivity. For example, it has good compatibility with the main component polymer (a) and can be finely dispersed in the main component polymer (a) without using a compatibilizer. When ensuring compatibility with the polymer (a) as the other main component, for example, when polyamide is used for the polymer (a), the polyolefin block may be replaced with a polyamide block.

  Here, what imparts semiconductivity is a block of a hydrophilic polymer having a hydrophilic group such as a carboxyl group, an amino group, or a hydroxyl group. The water bonded to the hydrophilic group is separated to be OH− and H +, and these ions having electric charges are transmitted through the block of the hydrophilic polymer, so that the resin has an appropriate surface resistivity (for example, 7 to 12 of 10). Squared Ω / □ order). The main component polymer (a), for example, polyolefin, is not semiconductive, but the block copolymers are in contact with each other in the polymer (a), so that the charge transmitted through the hydrophilic polymer block in a certain block copolymer is contacted. By transferring to the hydrophilic polymer block in another block copolymer, the entire resin has semiconductivity.

  Further, when a polyether such as polyethylene glycol or polyacetal is used as the hydrophilic polymer, semiconductivity can be obtained even in a low humidity environment. Polyether has regular and continuous ether bonds of carbon and oxygen ((-C-C-O-) n for polyethylene glycol, (-C-O-) n for polyacetal) in the main chain. . The ether bond is electrically biased due to the difference in electronegativity between carbon and oxygen, with oxygen attracting a positive charge and carbon attracting a negative charge. For this reason, water which is a polar molecule is attracted, but since it is only due to electrical attraction, it easily moves on the carbon chain by the electric field. That is, in the polyether, the main chain in which ether bonds are continuous serves as a conductive path through which charges are transmitted, so that charges can be easily transmitted. This is because other charges such as metal ions can be transferred along the main chain, and a semiconductivity having an appropriate surface resistivity can be obtained without depending on humidity.

  The invention according to claim 10 of the present invention is the electric dust collector according to any one of claims 1 to 9, wherein any one of the high voltage electrode, the dust collecting electrode, and the common electrode slides.

  Thereby, the protrusion slides on the electrode surface, and dust accumulated on the electrode can be scraped off.

  According to an eleventh aspect of the present invention, the handle of the electrostatic precipitator is provided with a handle, and any one of the high-voltage electrode, the dust collecting electrode, and the common electrode slides by pulling out the handle. The electric dust collector according to claim 10.

  Thereby, dust accumulated on the electrode can be removed by a simple operation from the outside of the apparatus.

  The invention according to claim 12 of the present invention is the electrostatic precipitator according to claim 10, further comprising a driving means for sliding any one of the high voltage electrode, the dust collecting electrode, and the common electrode.

  Thereby, dust can be removed without manpower.

  A thirteenth aspect of the present invention is the electrostatic precipitator according to the twelfth aspect, further comprising a timer that activates the driving means every specified time.

  Thereby, even if the user forgets the maintenance operation, the dust is automatically removed periodically, and the trouble due to the accumulation of dust can be prevented.

  The invention according to claim 14 of the present invention is characterized by comprising a weight sensor that detects the weight of the dust collecting electrode or the common electrode and activates the driving means when the specified weight is exceeded. It is an electric dust collector of description.

  As a result, the degree of dust accumulation can be detected, and even if the user forgets the maintenance operation, the dust is automatically removed as appropriate, and problems due to the accumulation of dust can be prevented.

  The invention according to claim 15 of the present invention is characterized in that the high voltage electrode and the dust collecting electrode or the common electrode are arranged so that the air flow direction is substantially vertical. An electrostatic precipitator according to claim 1.

  Thereby, when dust is scraped off, it can be naturally collected in one place by gravity.

  The invention according to claim 16 of the present invention is provided with a dust collection chamber on the upstream side or the downstream side of the air flow of the dust collection part. Device.

  As a result, the dust that has been scraped off can be collected in the dust collection chamber. As daily maintenance, the user can simply remove the dust collection chamber and discard the dust, which is easy.

  According to the seventeenth aspect of the present invention, a lid is provided in the dust collection chamber, and the lid opens in conjunction with sliding of any one of the high voltage electrode, the dust collection electrode, and the common electrode, and the sliding operation is completed. The electrostatic precipitator according to claim 16, wherein the electrostatic precipitator is closed afterward.

  If the dust collection chamber is open, the collected dust may be scattered again by the air flow. By adopting a mechanism that opens the dust collection chamber only during the dust removal operation and closes it when the operation is completed, it is possible to prevent the collected dust from re-scattering.

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

(Embodiment 1)
FIG. 1 is a perspective view showing a dust collecting portion of an electric dust collector according to Embodiment 1 of the present invention, and FIG. 2 is a top view thereof.

  A configuration of the electric dust collector of Embodiment 1 will be described.

  The electric dust collector includes a charging unit (not shown) upstream of the air flow and a dust collecting unit 1 downstream. The dust collecting unit 1 has a configuration in which plate-like high-voltage electrodes 2 and plate-like dust collecting electrodes 3 are alternately arranged. The high-voltage electrode 2 is composed of a conductor 4 and a coating film 5 made of a semiconductive material, and has a projection 6 made of an insulating material on the surface thereof. A plurality of protrusions 6 are provided on the surface of the high-voltage electrode 2 at regular intervals along the air flow direction, and the protrusions are in contact with the dust collection electrode 3. The protruding end of the protrusion 6 extends in a T shape so as to increase the contact area with the dust collecting electrode 3. The high voltage electrode 2 and the dust collecting electrode 3 are separately fixed to a housing (not shown), and the high voltage electrode 2 is configured to be slidable in the longitudinal direction.

  The protrusions 6 are made of a sliding material having wear resistance and good sliding properties. As the sliding material, fluorine resin, ultrahigh molecular weight high density polyethylene, polyacetal, nylon resin, or the like may be used. In particular, fluorine resin or ultra high molecular weight high density polyethylene is excellent in wear resistance.

  Further, the surface resistivity of the coating film 5 made of a semiconductive material was configured to be on the order of 10 7 to 12th power Ω / □. In order to obtain such a surface resistivity, a resin in which a block copolymer in which a polymer (a) and a hydrophilic polymer are alternately arranged is added to a main component polymer (a) may be used.

  The operation and action of the electric dust collector of Embodiment 1 will be described.

  During the dust collection operation, air containing dust is circulated through the electric dust collector by a blowing means (not shown). Upstream of the air flow, a high voltage is applied to the charging unit by a high voltage power source (not shown) to generate corona discharge to charge the dust in the air. At the same time, a high voltage is applied to the high-voltage electrode 2 by a high-voltage power supply in the downstream dust collection unit 1 to generate an electric field between the dust collection electrode 3 and the ground. The charged dust is attracted to and attached to the dust collecting electrode 3 by the Coulomb force acting on the electric field. The dust in the air is removed by the above action.

  Further, when the high voltage electrode 2 is slid in the longitudinal direction during maintenance, the protrusion 6 slides on the surface of the dust collecting electrode 3 and the accumulated dust is scraped off.

  The effect of the electric dust collector of Embodiment 1 is demonstrated.

  With this configuration, dust can be removed with a simple operation, and the burden on the user during maintenance can be reduced. Further, since the high voltage electrode 2 is composed of the conductor 4 and the coating film 5 made of a semiconductive material, the potential difference between the high voltage electrode 2 and the dust collecting electrode 3 does not decrease even when a voltage is applied for a long time. This mechanism is considered as follows.

  In the case of covering with an insulator, when a voltage is applied to the conductor 4, dielectric polarization occurs in the insulator, and charges appear on its surface. At this time, for example, the charge on the surface of the insulator may be lost due to electrical connection between the surface of the insulator and the grounded dust collecting electrode 3 due to adhesion of dust, for example. Once the charge on the surface of the insulator disappears, the charge cannot move inside the insulator even if a voltage is continuously applied to the conductor 4, so that the charge cannot be supplied to the surface. When coated with a semiconductive material, the semiconductive material conducts electricity slightly, so even if an environment where the charge on the surface disappears occurs, it is possible to slowly supply the charge from the conductor 4 to the electrode surface. It is considered that the potential difference between the electrodes does not decrease.

  Therefore, even if it has a bridge structure for improving maintainability, it is possible to provide an electric dust collector that can maintain high dust collection efficiency.

  Further, if the protruding end of the protrusion 6 is sharp, the electrode surface may be damaged when the electrode surface is slid, or the protrusion 6 itself may be worn. Further, when the stacked electrodes are supported by the protrusions 6 using the protrusions 6 as spacers, if the protrusions are sharp, the pressure applied to the protrusions increases, which increases the possibility of damage to the electrodes and protrusions 6 and makes the sliding operation difficult. . Therefore, it is preferable that the protruding end of the protrusion 6 is widened so that the contact area with the electrode becomes larger as in the first embodiment. Furthermore, by making the protrusion 6 a sliding material having wear resistance and good sliding property, the electrode and the protrusion 6 can be prevented from being damaged, and at the same time, the sliding operation can be facilitated.

  The semiconductive material in the electrostatic precipitator of Embodiment 1 will be described in detail.

  Generally, in the dust collection part of an electrostatic precipitator, for example, when dust adheres to and accumulates on the electrode surface and the distance between the electrodes is locally reduced, a spark may occur. This is caused by the electric charge applied to the electrodes jumping over the air gap and moving rapidly to the opposite electrode.

  Here, if the surface resistivity of the electrode is 10 7 Ω / □ or more, the movement of charges on the electrode surface can be restricted, and sparking can be prevented. Further, even when the protrusions 6 are made of a semiconductive material and cross-link between the electrodes, the movement of electric charges is suppressed even when they are in contact with each other, so that no spark is generated and an electric field can be generated.

  Further, when the entire high voltage electrode 2 is made of a semiconductive material, if the surface resistivity is such that a charge is applied to the electrode surface from the high voltage power source, that is, a surface resistivity of 10 12 Ω / □ or less, An electric field can be generated.

  Also, if the surface resistivity is less than 10 12 Ω / □ order, the charge moves slightly, so even if an environment where the charge on the electrode surface disappears, the charge is slowly supplied from the power supply to the electrode surface. It is considered that the potential difference between the electrodes does not decrease.

  Therefore, by setting the surface resistivity of the coating film made of a semiconductive material, high-voltage electrode, or protrusion to the order of 10 to the 12th power Ω / □, an electric field is generated and dust is captured while preventing sparks. In addition to collecting, it is possible to prevent a decrease in dust collection efficiency.

  One means for obtaining such surface resistivity is a resin obtained by adding a block copolymer in which polymer (a) and hydrophilic polymer are alternately arranged to polymer (a) as a main component as a semiconductive material. Is to use.

  For example, when polyolefin such as polypropylene or polyethylene is used as the main polymer (a), a block copolymer in which polyolefin blocks and hydrophilic polymer blocks are alternately repeated is used as an additive for imparting semiconductivity. For example, it has good compatibility with the main component polymer (a) and can be finely dispersed in the main component polymer (a) without using a compatibilizer. When ensuring compatibility with the polymer (a) as the other main component, for example, when polyamide is used for the polymer (a), the polyolefin block may be replaced with a polyamide block.

  Here, what imparts semiconductivity is a block of a hydrophilic polymer having a hydrophilic group such as a carboxyl group, an amino group, or a hydroxyl group. The water bonded to the hydrophilic group is separated to be OH− and H +, and these ions having electric charges are transmitted through the block of the hydrophilic polymer, so that the resin has an appropriate surface resistivity (for example, 7 to 12 of 10). Squared Ω / □ order). The main component polymer (a), for example, polyolefin, is not semiconductive, but the block copolymers are in contact with each other in the polymer (a), so that the charge transmitted through the hydrophilic polymer block in a certain block copolymer is contacted. By transferring to the hydrophilic polymer block in another block copolymer, the entire resin has semiconductivity.

  Further, when a polyether such as polyethylene glycol or polyacetal is used as the hydrophilic polymer, semiconductivity can be obtained even in a low humidity environment. Polyether has regular and continuous ether bonds of carbon and oxygen ((-C-C-O-) n for polyethylene glycol, (-C-O-) n for polyacetal) in the main chain. . The ether bond is electrically biased due to the difference in electronegativity between carbon and oxygen, with oxygen attracting a positive charge and carbon attracting a negative charge. For this reason, water which is a polar molecule is attracted, but since it is only due to electrical attraction, it easily moves on the carbon chain by the electric field. That is, in the polyether, the main chain in which ether bonds are continuous serves as a conductive path through which charges are transmitted, so that charges can be easily transmitted. This is because other charges such as metal ions can be transferred along the main chain, and a semiconductivity having an appropriate surface resistivity can be obtained without depending on humidity.

  In the first embodiment, the high-voltage electrode 2 is composed of the conductor 4 and the coating film 5 made of a semiconductive material, but the entire electrode may be composed of a semiconductive material. In this case, as in the former case, since the semiconductive material slightly conducts electricity, it can be considered that charges can be gently supplied to the electrode surface even in an environment where the surface charge disappears.

  In the first embodiment, the protrusion 6 is made of an insulating material, but may be made of a semiconductive material.

  In the first embodiment, the protrusion 6 is made of a sliding material having wear resistance and good sliding property. However, even if only the protruding end portion is made of a sliding material, the desired effect can be exhibited.

  In the first embodiment, the high voltage electrode 2 is configured to be slidable, but the dust collecting electrode 3 may be configured to be slidable.

  Moreover, it is good also as a structure which equips the housing | casing of an electrostatic dust collector with a handle and the high voltage electrode 2 or the dust collection electrode 3 slides by operation which pulls out a handle. Thereby, the dust accumulated on the dust collecting electrode 3 can be removed by a simple operation from the outside of the apparatus.

  Moreover, you may provide the drive means which slides the high voltage electrode 2 or the dust collection electrode 3. FIG. Thereby, dust can be removed without manpower. Furthermore, you may provide the timer which operates a drive means for every designated time. Thereby, even if the user forgets the maintenance operation, the dust is automatically removed periodically, and the trouble due to the accumulation of dust can be prevented. Instead of the timer, a weight sensor that detects the weight of the electrode and activates the driving means when the weight exceeds the specified weight may be provided. As a result, the degree of dust accumulation can be detected, and even if the user forgets the maintenance operation, the dust is automatically removed as appropriate, and problems due to the accumulation of dust can be prevented.

(Embodiment 2)
FIG. 3 is a perspective view showing a dust collecting portion of the electric dust collector according to Embodiment 2 of the present invention, and FIG. 4 is a top view thereof.

  Since the basic configuration, operation, action, effect, and variation of the second embodiment are the same as those of the first embodiment, different points will be mainly described.

  The structure of the electric dust collector of Embodiment 2 is demonstrated.

  The dust collector 7 of the electrostatic precipitator is composed of a common electrode 8 having a high-voltage electrode and a dust-collecting electrode having the same structure, and is composed of a conductor 4 and a coating film 5 made of a semiconductive material. A projection 6 made of a semiconductive material is provided on the surface of the shared electrode 8, and a power feeding portion 9 for applying a voltage to the conductor 4 is provided at one end in the longitudinal direction of the shared electrode 8. The common electrode 8 was laminated so that the power feeding units 9 face each other alternately, and the dust collecting unit 7 was configured. A plurality of protrusions 6 are provided on the surface of the shared electrode 8 at regular intervals along the air flow direction, and the protruding ends are in contact with the adjacent shared electrode 8. The protruding end of the protrusion 6 extends in a T shape so as to increase the contact area with the common electrode 8 that is in contact. Adjacent common electrodes 8 are separately fixed to the casing, and one of them is configured to be slidable in the longitudinal direction.

  The operation and action of the electric dust collector of Embodiment 2 will be described.

  As shown in FIG. 4, the dust collection unit 7 has a symmetrical structure with respect to the center line (CL), one side in the longitudinal direction is defined as the high-voltage side, and the other is defined as the ground side, and the power supply unit 9 on the high-pressure side. Is connected to the high-voltage power source, and the power supply section 9 on the ground side is connected to the ground.

  During the dust collection operation, a high voltage is applied to the high-voltage shared electrode 8a by a high-voltage power source, and an electric field is generated between the adjacent ground-side shared electrode 8b. The charged dust is attracted to and attached to the ground side shared electrode 8b by the Coulomb force acting on the electric field.

  When the high-voltage side shared electrode 8a is slid in the longitudinal direction during maintenance, the protrusion 6 slides on the surface of the adjacent ground-side shared electrode 8b, and the accumulated dust is scraped off.

  The effect of the electric dust collector of Embodiment 2 is demonstrated.

  With this configuration, dust can be removed with a simple operation, and the burden on the user during maintenance can be reduced. Further, since the shared electrode 8 is composed of the conductor 4 and the coating film 5 made of a semiconductive material, the potential difference between the electrodes does not decrease even when a voltage is applied for a long time.

  Therefore, even if it has a bridge structure for improving maintainability, it is possible to provide an electric dust collector that can maintain high dust collection efficiency.

  In addition, with this configuration, the dust collecting portion can be configured with one type of electrode, so that the manufacturing cost can be reduced.

  In the second embodiment, the protrusion 6 is made of a semiconductive material, but may be made of an insulating material. However, since it is easier to manufacture using the same material as the coating film 5, it is preferable to use a semiconductive material.

(Embodiment 3)
FIG. 5 is a schematic diagram showing the configuration of the electrostatic precipitator according to Embodiment 3 of the present invention.

  Since the basic configuration, operation, action, effect, and variation of the third embodiment are the same as those of the first or second embodiment, differences will be mainly described.

  The structure of the electric dust collector of Embodiment 3 is demonstrated.

  The electric dust collector 10 includes a charging unit 11, a dust collecting unit 1, a dust collecting chamber 12, and a blower 13 in order from the upstream side of the air flow. The dust collector 1 is provided with the high-voltage electrode 2 and the dust collector electrode 3 so that the air flow direction is substantially vertical, and the handle 14 is provided on the housing portion that supports the electrode of the dust collector 1. . The dust collecting chamber 12 is provided with a lid 15.

  The operation and action of the electric dust collector of Embodiment 3 will be described.

  During the dust collection operation, air containing dust is circulated through the electric dust collector 10 by the blower 13. The charging unit 11 generates corona discharge to charge the dust in the air. At the same time, an electric field is generated between the high voltage electrode 2 and the dust collection electrode 3 in the dust collection unit 1. The charged dust is attracted to and attached to the dust collecting electrode 3 by the Coulomb force acting on the electric field. The dust in the air is removed by the above action.

  During maintenance, when the blower 13 is stopped and the handle 14 is pulled out, the high voltage electrode 2 slides in the longitudinal direction, the projection 6 slides on the surface of the dust collection electrode 3, and the accumulated dust is scraped off. At this time, the lid 15 is opened in conjunction with the operation of pulling out the handle, and the scraped dust is dropped into the dust collecting chamber 12 and collected. Then, the lid 15 is closed in conjunction with the operation of pushing the handle 14 (returning it to the original position).

  The effect of the electric dust collector of Embodiment 3 is demonstrated.

  With this configuration, dust can be removed with a simple operation. Also, the dust that has been scraped off can be collected naturally in the dust collection chamber by gravity. The user can easily remove the dust collecting chamber 12 and discard the dust as daily maintenance.

  Further, if the dust collection chamber 12 is opened, the collected dust may be re-scattered by the air flow. By adopting a mechanism in which the lid 15 of the dust collecting chamber 12 opens and closes when the operation is completed only during the dust removal operation, it is possible to prevent the collected dust from re-scattering.

  In the third embodiment, the dust collection unit 1 of the first embodiment is applied to the dust collection unit. However, the dust collection unit 7 of the second embodiment and other related configurations may be applied.

  The electric dust collector according to the present invention can maintain high dust collection efficiency even if it has a cross-linking structure for improving maintainability. This is useful, for example, as an electric dust collector mounted on a home air purifier or a residential ventilation system.

DESCRIPTION OF SYMBOLS 1 Dust collection part 2 High voltage electrode 3 Dust collection electrode 4 Conductor 5 Cover film 6 Protrusion 7 Dust collection part 8 Shared electrode 9 Power supply part 10 Electric dust collector 11 Charging part 12 Dust collection chamber 13 Blower 14 Handle 15 Cover 101 Collection Dust part 102 High voltage electrode 103 Dust collecting electrode 104 Insulating protrusion

Claims (17)

In an electrostatic precipitator including a dust collecting portion having a configuration in which plate-like high-voltage electrodes having protrusions and plate-like dust collecting electrodes are alternately arranged, the high-voltage electrode is covered with a semiconductive material. An electrostatic precipitator which is a conductor and wherein the protrusion is made of an insulating material or a semiconductive material. In the electrostatic precipitator including a dust collector having a configuration in which plate-like high-voltage electrodes provided with protrusions and plate-like dust collecting electrodes are alternately arranged, the high-voltage electrode is made of a semiconductive material, An electrostatic precipitator, wherein the protrusion is made of an insulating material or a semiconductive material. The high-voltage electrode and the dust collecting electrode are made of a common electrode having the same structure, the common electrode is a conductor covered with a semiconductive material, and the common electrode is provided with a protrusion made of an insulating material or a semiconductive material. 2. The electrostatic precipitator according to claim 1, wherein a power feeding unit that applies a voltage to the conductor is provided at one end of the common electrode, and the common electrode is stacked so that the power feeding units are alternately opposed to each other. apparatus. The electrostatic precipitator according to claim 1 or 2, wherein a plurality of protrusions are provided on the surface of the high-voltage electrode at regular intervals along the air flow direction, and the protrusions are in contact with the dust collecting electrode. 4. The electrostatic precipitator according to claim 3, wherein a plurality of protrusions are provided on the surface of the shared electrode at regular intervals along the air flow direction, and the protruding ends are in contact with adjacent shared electrodes. 6. The electrostatic precipitator according to any one of claims 1 to 5, wherein a protruding end of the protrusion is widened so as to increase a contact area with the dust collecting electrode or the common electrode. The electrostatic precipitator according to any one of claims 1 to 6, wherein the entire protrusion or the protruding end is a sliding material having wear resistance and good sliding property. The electrical resistivity according to any one of claims 1 to 7, wherein the surface resistivity of the coating film made of a semiconductive material, the high voltage electrode, or the protrusion is on the order of 10 7 to 12th power Ω / □. Dust collector. 9. The resin according to claim 1, wherein the semiconductive material is a resin obtained by adding a block copolymer in which the polymer (a) and the hydrophilic polymer are alternately arranged to the main polymer (a). The electrostatic precipitator according to 1. The electrostatic precipitator according to any one of claims 1 to 9, wherein any one of the high-voltage electrode, the dust collecting electrode, and the common electrode slides. The electrostatic precipitator according to claim 10, wherein a handle is provided in a housing of the electrostatic precipitator, and any one of the high-voltage electrode, the dust collecting electrode, and the common electrode slides by an operation of pulling out the handle. 11. The electrostatic precipitator according to claim 10, further comprising driving means for sliding any one of the high voltage electrode, the dust collecting electrode, and the common electrode. 13. The electrostatic precipitator according to claim 12, further comprising a timer that activates the driving means at a specified time. 13. The electrostatic precipitator according to claim 12, further comprising a weight sensor that detects a weight of the dust collecting electrode or the common electrode and activates the driving unit when the weight exceeds a specified weight. 15. The electrostatic precipitator according to claim 1, wherein the high voltage electrode and the dust collecting electrode or the common electrode are arranged so that the air flow direction is a substantially vertical direction. 16. The electrostatic precipitator according to claim 1, further comprising a dust collecting chamber on an upstream side or a downstream side of the air flow of the dust collecting unit. The dust collection chamber is provided with a lid, and the lid opens in conjunction with sliding of any one of the high-voltage electrode, the dust collection electrode, and the common electrode, and closes after the sliding operation is completed. Electric dust collector.

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