JP2009095799A - Electric precipitator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric precipitator and its dust collection part, having a high-voltage electrode which consists of a semiconductive material and is supported by a supporting member consisting of an insulation material or the semiconductive material, wherein a leak current from the high-voltage electrode is kept as low as possible. <P>SOLUTION: The dust collection part 5 of the electric precipitator 1 includes: a non dust-collection electrode 13 consisting of the semiconductive material; the dust collection part 15 consisting of a conductive material; the supporting member 23 consisting of an insulative material and contacting to the non dust collection electrode 13 to support it; a voltage maintaining member 17 which consists of the conductive material, contacts to the supporting member 23 to support it, and is applied a voltage equivalent to the voltage applied to the non dust-collection electrode 13; and a power supplying member 25 consisting of the conductive material and supplying a power to the non dust collection electrode 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric dust collector and the dust collecting section, and more particularly to a non-dust collecting electrode made of a semiconductive material.

  Conventionally, in an electrostatic precipitator configured with a charging part and a dust collecting part, the high voltage electrode (non-dust collecting electrode) of the dust collecting part is made of a semi-insulating substance (semi-conductive material), and the dust collecting part It is known that a spark discharge is prevented from occurring between a high-voltage electrode and a ground electrode (a ground electrode made of metal; a dust collecting electrode) (see, for example, Patent Document 1).

  The conventional electrostatic precipitator prevents the electric field from being localized on the high-voltage electrode when a high voltage is applied to the high-voltage electrode by making the electrode semi-insulating, and excessive current flows to the high-voltage electrode. , Restricts instantaneous charge movement on the high-voltage electrode, and suppresses the occurrence of spark discharge.

And even if the collected dust adheres to the ground electrode, compared with the case where both the high-voltage electrode and the ground electrode are made of metal, spark discharge is less likely to occur. The cleaning interval of the ground electrode can be made long (compared to the case where both electrodes are made of metal).
Japanese Patent No. 3516725

  By the way, in the conventional electrostatic precipitator, when high positive voltage is applied to the high voltage electrode and dust is collected by the ground electrode, the dust to be collected by the ground electrode is not so small on the surface of the support member of the high voltage electrode. There are times when it adheres.

  For example, since the high voltage electrode is supported by the housing of the electrostatic precipitator through the support member made of a semi-insulating material, the high voltage electrode is transferred from the high voltage electrode to the housing through the dust adhering to the surface of the support member. There is a problem that the leakage current that leaks increases, the voltage of the high-voltage electrode decreases, and the efficiency of dust collection may decrease. This problem may occur in the same manner even when the support member is made of an insulating material. In addition, the above problem becomes more prominent when the number of supporting members increases with the increase in the size of the dust collecting portion.

  The present invention has been made in view of the above problems, and the high-voltage electrode is made of a semiconductive material, and the high-voltage electrode is supported by a support member made of an insulating material or a semiconductive material. It is an object of the present invention to provide an electrostatic precipitator and a dust collector that can reduce the leakage current from the high-voltage electrode as much as possible in the electrostatic precipitator having the configuration and the dust collector.

  The invention according to claim 1 is composed of a non-dust collecting electrode made of a semiconductive material, a dust collecting electrode made of a conductive material, and an insulating material or a semiconductive material, A support member that contacts the non-dust collection electrode and supports the non-dust collection electrode, and a conductive material, contacts the support member, supports the support member, and is applied to the non-dust collection electrode. A voltage maintaining member to which a voltage equal to, slightly higher than the voltage or lower than the voltage is applied, and a conductive material, and supplies power to the non-dust collecting electrode It is a dust collection part of the electric dust collector which has a feeding member to perform.

  According to a second aspect of the present invention, in the dust collector of the electrostatic precipitator according to the first aspect, the power feeding member is a dust collector of the electrostatic precipitator made of metal.

  According to a third aspect of the present invention, in the dust collector of the electric dust collector according to the first or second aspect, the power supply member is in contact with the voltage maintaining member, and power is supplied from the voltage maintaining member. It is a dust collection part of the electric dust collector which is the structure which receives.

  The invention according to claim 4 is formed in a rectangular cylindrical shape with an insulating material, so that a casing opened in the height direction and a rectangular thin plate shape with a semiconductive material are formed. A plurality of non-dust collecting electrodes formed, a plurality of dust collecting electrodes formed in a rectangular thin plate shape with a conductive material, and formed into a rod shape with an insulating material or a semiconductive material, A plurality of slits for supporting each non-dust collecting electrode are provided at predetermined intervals in the length direction, and the respective non-dust collecting electrodes are brought into contact with and engaged with each slit. The non-dust-collecting electrodes are formed in a rod shape with a support member integrally supporting the non-dust-collecting electrodes so as to be arranged at predetermined intervals in the thickness direction, and support the dust-collecting electrodes. A plurality of slits are provided at predetermined intervals in the length direction, By bringing the non-dust-collecting electrodes into contact with and engaging with a lit, a feeding member that feeds power to the non-dust-collecting electrodes and a belt-like shape made of a conductive material are formed in the longitudinal direction of the casing. The end of the casing in the width direction is provided integrally with the casing inside the casing, and the non-dust collecting electrode, the support member, and the power supply member are provided in the casing. The support member is inserted into the inside, and is in contact with each longitudinal end of the support member and each end of the power supply member so that the support member and the power supply member are integrated with the housing. A plurality of slits for supporting each dust collecting electrode are provided at predetermined intervals in the length direction, and are formed in a rod shape by a supporting voltage maintaining member and a conductive material. Each dust collector electrode is brought into contact with and engaged with each dust collector electrode. Are integrally supported so as to be arranged at a predetermined interval in the thickness direction to supply power to each dust collecting electrode, and each dust collecting electrode is inside the housing, and each dust collecting electrode is each of the dust collecting electrodes. Each end in the longitudinal direction is integrated with the housing so that the dust collecting electrodes are alternately separated from the non-dust collecting electrodes and are alternately inserted between the non-dust collecting electrodes. It is a dust collection part of an electric dust collector which has a grounding member supported and provided inside the case.

  The invention according to claim 5 is the dust collecting part according to any one of claims 1 to 4, and a charging part that is charged with dust in the air in order to collect the dust in the dust collecting part, An electric dust collector having a fan for flowing air from the charging unit to the dust collecting unit.

  According to the present invention, in the dust collector and the electrostatic precipitator having the configuration in which the high-voltage electrode is formed of a semiconductive material and the high-voltage electrode is supported by a support member formed of an insulating material or a semiconductive material. There is an effect that the leakage current from the high-voltage electrode can be minimized.

  FIG. 1 is a diagram conceptually showing an electrostatic precipitator 1 according to an embodiment of the present invention.

  An electric dust collector (electrostatic dust collector) 1 is used, for example, as a dust collector for an air conditioner, and includes a charging unit 3, a dust collecting unit 5, and a fan 7.

  The charging unit 3 charges the dust (dust) D in the air in order to collect the dust in the dust collecting unit 5, and the ionization line 9 to which a high voltage (for example, +5 kV) is applied, and the ionization line 9 It consists of a counter electrode (ground electrode) 11 arranged so as to sandwich it. The dust collection unit 5 includes a non-dust collection electrode (high voltage electrode; non-dust collection member) 13 to which a high voltage (for example, +3.5 kV) is applied, and a dust collection electrode (ground electrode; dust collection member) 15 connected to the ground. It consists of.

  The fan 7 is for flowing air from the charging unit 3 to the dust collecting unit 5, and is sucked into the inside of the casing of the charging unit 3 and the dust collecting unit 5 (not shown in FIG. 1) by the fan 7. As indicated by an arrow AR1, the dust-containing air passes through the charging unit 3 and then through the dust collecting unit 5 and is discharged to the outside of the casing.

  In the charging unit 3, as indicated by an arrow AR3, corona discharge occurs, and dust D in the air is charged to +. Further, in the dust collecting portion 5, electric lines of force (or a simple potential difference) as indicated by an arrow AR5 are generated, and the charged dust D is captured by the dust collecting electrode 15.

  The charging unit 3 and the dust collecting unit 5 will be described in more detail with respect to the dust collecting unit 5 in particular.

  FIG. 2 is a perspective view showing a schematic configuration of the charging unit 3 and the dust collecting unit 5, and is a view of the charging unit 3 and the dust collecting unit 5 seen from the dust collecting unit 5 side. FIG. 3 is a perspective view illustrating a schematic configuration of the charging unit 3 and the dust collecting unit 5, and is a view of the charging unit 3 and the dust collecting unit 5 viewed from the charging unit 3 side. FIG. 4 is a diagram illustrating a state where the charging unit 3 and the dust collecting unit 5 are separated from each other in FIG. 3.

  FIG. 5 is an exploded perspective view of the dust collecting portion 5, and FIG. 6 is a view showing a state in which the non-dust collecting electrode 13 and the dust collecting electrode 15 are assembled, and each plate-like non-dust collecting electrode 13. FIG. 5 is a view of the non-dust collecting electrode 13 and the dust collecting electrode 15 as viewed from the thickness direction of each dust collecting electrode 15 having a plate shape. FIG. 7 is a view corresponding to FIG. 5 and showing a state in which only the non-dust collecting electrode 13 is assembled. FIG. 8 is a view corresponding to FIG. 5 and showing a state in which only the dust collecting electrode 15 is assembled.

  9 is a diagram showing a section IX-IX in FIG. 6, FIG. 10 is a diagram showing a section XX in FIG. 6, and FIG. 11 is a diagram showing a section XI-XI in FIG. . 12 is a diagram showing a schematic configuration of the voltage maintaining member 17, and FIG. 13 is a plan view (FIG. 13 (a)) and a front view (FIG. 13 (b)) of the voltage maintaining member 17.

  For convenience of explanation below, directions orthogonal to each other may be referred to as an X-axis direction, a Y-axis direction, and a Z-axis direction.

The charging unit 3 is integrally provided with an ionization line 9 and a counter electrode 11 in a rectangular cylindrical housing (a housing made of an insulating material having a resistivity higher than 10 ¹³ Ωcm) 19. The dust collecting portion 5 is also formed in a rectangular cylindrical casing (a casing made of an insulating material similar to the casing 19) 21 and the non-dust collecting electrode 13 and the dust collecting section. The electrode 15 is integrally provided. As can be understood from FIG. 2 and FIG. 3, the charging unit 3 and the dust collecting unit 5 constitute one cassette and can be easily attached to and detached from the main body of the air conditioner for maintenance and the like. Yes. As can be understood from FIG. 4, the charging unit 3 and the dust collecting unit 5 can be easily joined and separated.

The non-dust collecting electrode 13 is made of a semiconductive material (for example, a material that is a semiconductive resin and has a resistivity (volume resistivity) of 10 ¹⁰ Ωcm to ^{10 13} Ωcm). It is supported by. The dust collecting electrode 15 is made of a conductive material (for example, a metal such as aluminum) and is supported by the casing 21 at a predetermined distance from each non-dust collecting electrode 13. A plurality of non-dust collecting electrodes 13 and dust collecting electrodes 15 are provided so as to be parallel to each other.

  The support member 23 is made of an insulating material or a semiconductive material. The support member 23 contacts the non-dust collecting electrode 13 and integrally supports the non-dust collecting electrode 13 so that the non-dust collecting electrodes 13 are aligned at a predetermined interval. At this time, since the support member 23 is made of an insulating or semiconductive material, there is no problem such as spark discharge with the dust collecting electrode 15.

  The voltage maintaining member 17 is made of a conductive material (for example, a metal such as aluminum). The support member 23 and the housing 21 are brought into contact with each other so as to integrally support the support member 23 and the housing 21. Further, the voltage maintaining member 17 has a voltage substantially equal to the voltage applied to the non-dust collecting electrode 13 via a terminal (not shown) (for example, the voltage of the voltage maintaining member 17 with respect to the voltage 5 kV of the non-dust collecting electrode 13). 4 kV or more and 6 kV or less) is applied. Note that the voltage applied to the voltage maintaining member 17 is higher (for example, slightly higher) than the voltage supplied to the non-dust collecting electrode 13 or lower than the voltage applied to the non-dust collecting electrode 13. There may be.

  Although the power supply member 25 is made of a conductive material, in order to allow a part of the power supply member 25 to bite into the non-dust collecting electrode 13 to increase the contact area, the power supply member 25 is made of, for example, aluminum. It is desirable to be made of metal. The power supply member 25 is provided integrally with the housing 21 apart from the support member 23, and contacts the substantially both ends of the non-dust collection electrode 13 to supply power to the non-dust collection electrode 13 (apply high voltage). It is like that. With this configuration, a uniform voltage can be applied to each non-dust collecting electrode 13 as a whole. Further, both ends of the power supply member 25 are in contact with the voltage maintaining member 17 and are configured to receive power supply from the voltage maintaining member 17.

  As can be understood from FIGS. 9 and 11, the voltage maintaining member 17 is sandwiched between the support member 23 and the housing 21. The support member 23 and the power supply member 25 are integrally provided on the housing 21 via the voltage maintaining member 17. In addition, the power supply member 25 is provided at the end in the length direction (X-axis direction) of the non-dust collecting electrode 13 and sufficiently away from the dust collecting electrode 15.

  Here, the dust collecting unit 5 will be described in more detail with an example.

  The casing 21 is formed in a rectangular cylindrical shape, and thus opens in the height direction (Z-axis direction). The non-dust collecting electrode 13 is formed in a rectangular thin plate shape, and a plurality of non-dust collecting electrodes 13 are provided. The dust collecting electrodes 15 are also formed in a rectangular thin plate shape, and a plurality of dust collecting electrodes 15 are provided.

  The support member 23 is formed in an elongated rod shape, and a plurality of slits 27 (see FIG. 5) for supporting each non-dust collecting electrode 13 are provided at predetermined intervals in the length direction (Y-axis direction). ing. Then, each non-dust collecting electrode 13 part (a part of the end in the width direction (Z-axis direction) of each non-dust collecting electrode 13) is brought into contact with and engaged with each slit 27. The electrodes 13 are integrally supported so as to be arranged at a predetermined interval in the thickness direction (Y-axis direction).

  In addition, the support member 23 is provided with two or more, for example, two in the width direction one end part (upper edge part of FIG. 5) side of the non-dust collection electrode 13, and the width direction other end of the non-dust collection electrode 13 Three are provided on the side of the portion (lower end in FIG. 5). When the non-dust collecting electrodes 13 supported by the five support members 23 are viewed from the thickness direction (Y-axis direction), as shown in FIG. 7, they overlap each other in the thickness direction, and have a substantially elongated rectangular shape. Presents.

  Further, the support member 23 extends in the thickness direction of the non-dust collection electrode 13 (the direction in which the non-dust collection electrodes 13 are arranged). Further, as shown in FIG. 7, each support member 23 is fixed on one end side and the other end side in the width direction of the non-dust collection electrode 13 with a predetermined interval in the longitudinal direction of the non-dust collection electrode 13. Are alternately provided at intervals.

  The power supply member 25 is formed in an elongated rod shape by bending a thin plate-shaped material made of a conductive material (for example, a metal such as aluminum) (including not only bending but also welding). The power supply member 25 is provided with a plurality of slits 29 (see FIG. 5) for supporting each non-dust collecting electrode 13 at predetermined intervals in the length direction. Then, each non-dust collecting electrode 13 is brought into contact with and engaged with each slit 29 (the end in the longitudinal direction (X-axis direction) of each non-dust collecting electrode 13). The non-dust collecting electrodes 13 are supplied with power while being integrally supported with a predetermined interval in the thickness direction (Y-axis direction). Note that the slit 29 penetrates in the thickness direction of the material constituting the power supply member 25. The edge of the slit 29 is formed with an edge portion having a sharp tip, and the non-dust collecting electrode 13 is slightly shaved to bite into the non-dust collecting electrode 13.

  The voltage maintaining member 17 is formed of a conductive material (for example, a metal such as aluminum) in an elongated strip shape (branched in FIGS. 12 and 13). Then, it extends in the longitudinal direction (X-axis direction) of the casing 21 and is provided integrally with the casing 21 on the end side in the width direction (Y-axis direction) of the casing 21 and inside the casing 21. Yes. Further, the support member 23, the power supply member 25, and the non-collection are brought into contact with the end portions (both end portions) of the support member 23 in the longitudinal direction (Y-axis direction) and the end portions (both end portions) of the power supply member 25. The support member 23 and the power supply member 25 are supported so that the dust electrode 13 is integrated with the housing 21.

  In such a supporting state, the longitudinal direction (X-axis direction) of each non-dust collecting electrode 13 and the longitudinal direction of the housing 21 coincide with each other, and the thickness direction (Y Axial direction; direction in which the non-dust collecting electrodes 13 are arranged) and the width direction of the casing 21 coincide with each other, and the width direction (Z-axis direction) of each non-dust collecting electrode 13 and the height of the casing 21 The longitudinal direction of the support member 23 (Y-axis direction) and the width direction of the housing 21 coincide with each other, the longitudinal direction of the power supply member 25 (Y-axis direction) and the width of the housing 21. The direction matches each other. Further, each non-dust collecting electrode 13, the support member 23, and the power supply member 25 are inside the casing 21.

  Note that the support member 23 and the power supply member 25 are in a form in which a part of the voltage maintaining member 17 (for example, an end portion in the longitudinal direction of the voltage maintaining member 17) is sandwiched therebetween, for example, by a fastener such as a bolt. Are integrally provided.

  The ground member 31 is formed in an elongated rod shape by bending (including not only bending but also welding) a thin plate-like material made of a conductive material (for example, metal such as aluminum). The grounding member 31 is provided with a plurality of slits 33 (see FIG. 5) for supporting each dust collecting electrode 15 at predetermined intervals in the length direction (Y-axis direction). The portion of each dust collecting electrode 15 (the end in the longitudinal direction (X-axis direction) of each dust collecting electrode 15, the middle in the longitudinal direction of each dust collecting electrode 15 and the end in the width direction (Z-axis direction) ) Are brought into contact with each other and are integrally supported so that the dust collecting electrodes 15 are arranged at predetermined intervals in the thickness direction (Y-axis direction). It is supposed to be.

  In such a state of support, the longitudinal direction (X-axis direction) of each dust collecting electrode 15 and the longitudinal direction of the housing 21 coincide with each other, and the thickness direction (Y-axis direction) of each dust collecting electrode 15 The direction in which the respective dust collecting electrodes 15 are arranged) and the width direction of the casing 21 coincide with each other, and the width direction (Z-axis direction) of each dust collecting electrode 15 and the height direction of the casing 21 are mutually It matches. In addition, the grounding member 31 and each dust collecting electrode 15 are inside the housing 21, and each dust collecting electrode 15 is alternately arranged between each non-dust collecting electrode 13 at a certain distance from each non-dust collecting electrode 13. It has entered. Further, the respective end portions of the grounding member 31 in the longitudinal direction (Y-axis direction) are integrally formed with the casing 21 by fasteners such as bolts so that each dust collecting electrode 15 is integrated with the casing 21. It is supported. Power is supplied to the grounding member 31 via a terminal or the like (not shown).

  As already understood, the grounding member 31 has both the role of setting each dust collecting electrode 15 to the ground potential and the role of supporting each dust collecting electrode 15. Further, as can be understood from FIG. 5 and the like, a plurality of members are provided in the same manner as the support member 23 and the power supply member 25. Further, when the non-dust collecting electrode 13 is viewed from this thickness direction (Y-axis direction) while being supported by the grounding member 31, as shown in FIGS. 6 and 8, they are substantially overlapped with each other in the thickness direction. It has an elongated rectangular shape. Further, the non-dust collecting electrode 13 and the dust collecting electrode 15 are provided with a notch 35 in order to avoid interference with the support member 23 and the grounding member 31.

  The power supply member 25 is covered with a cover member 37 made of an insulating material so that it is not exposed to the outside of the housing 21.

  Here, the semiconductive resin constituting the non-dust collecting electrode 13 and the support member 23 will be described with examples.

  As the semiconductive resin, for example, those shown in Japanese Patent No. 3516725 can be used.

That is, it is possible to use a resin that has been given hygroscopicity by adding a water-absorbing resin to a resin substrate such as a thermoplastic resin and blending it. Such a resin exhibits semi-insulating properties due to moisture absorbed by the water-absorbing resin blended in the resin. By adjusting the blending amount of the water-absorbing resin, the volume specific resistance value of the resin is 10 It is a preferred resin because it can be freely prepared to be in the order of ¹⁰ to 10 ¹³ Ωcm. In general, the blending amount varies depending on the type of resin, but is 5 to 50% by weight.

  Examples of the resin base material include thermoplastic resins such as ABS resin, polyester resin, and acrylic resin. In particular, when ABS resin is used as the base material, the moldability, flame retardancy, heat resistance, and impact resistance are excellent. Can be obtained, and the manufacturing cost is low. In addition, examples of the resin base material in which the resin itself has hygroscopicity include a phenol resin, a melamine resin, and a urea resin. Further, as an example of such a thermosetting resin, in particular, when a phenol resin is used as a base material, a desired resistance value is easily obtained and a preferable result is obtained.

  On the other hand, the water-absorbing resin to be mixed includes acrylate-based, poval-based, polyamide-based, etc., and is selected in consideration of water absorption ability, durability of resistance value, compatibility with base resin, and the like. As such a hygroscopic resin, for example, commercially available products such as Maxroy (trade name; manufactured by JSR Corporation; registered trademark) and Sumilite (trade name; manufactured by Sumitomo Bakelite Corporation; registered trademark) can be used.

In the case of the hygroscopic resin thus prepared, for example, in the case of a resin to which ABS is used as a resin base material and a water absorbent resin is added, a sufficiently dried resin plate (thickness 2 mm) is obtained at a temperature of 70 ° C. and humidity. The moisture absorption after standing in a 65% constant temperature and humidity chamber for 48 hours is 0.7 to 1.5% by weight with respect to the dry resin. At this time, it is returned to the normal atmosphere and left for a certain time (48 hours or more). The volume resistivity value of the resin after the treatment was on the order of 10 ¹⁰ to 10 ¹³ Ωcm. Similarly, in the case of phenol resin, the volume resistivity value was on the order of 10 ¹⁰ to 10 ¹³ Ωcm.

  Furthermore, as a semiconductive resin constituting the non-dust collecting electrode 13 and the support member 23, a resin (insulating resin) serving as a base material is made of carbon black, carbon fiber, conductive or semiconductive whisker, stainless fiber, or the like. You may use what mix | blended a suitable quantity of electrically conductive materials.

  Next, the test results of the case where the voltage maintaining member 17 is provided and the case where the voltage maintaining member 17 is not provided (the support member 23 is directly supported by the casing 21) will be described with reference to FIG.

  The “high voltage connecting plate” in the table shown on the upper side of FIG. 14 shows the voltage maintaining member 17, and the graph G1 is a collection when the voltage maintaining member 17 is provided and a high voltage is applied thereto. The graph G3 shows the change in the collection rate when the voltage maintaining member 17 is not provided. Further, “1 cycle” in FIG. 14 is the one in which the electrostatic precipitator 1 is operated for smoke equivalent to 300 cigarettes.

  As can be understood from FIG. 14, the voltage maintenance member 17 is provided with a lower degree of reduction in the collection efficiency even if the operation time of the electrostatic precipitator 1 is increased.

  According to the electrostatic precipitator 1, the voltage maintaining member 17 to which a voltage equal to the voltage fed to the non-dust collecting electrode 13 is applied is provided between the housing 21 and the support member 23. The potential is substantially equal to the potential of the non-dust collecting electrode 13. That is, the potential of the support member 23 is maintained, and the decrease in the potential of the support member 23 with respect to the non-dust collecting electrode 13 is almost eliminated. Therefore, even if dust adheres to the surface of the support member 23 due to long-term use of the electrostatic precipitator 1, it is possible to prevent current leakage through the surface of the attached dust and prevent non-dust collection. The leakage current from the electrode (high voltage electrode) 13 can be minimized. In addition, since the non-dust collecting electrode 13 is made of a semiconductive material, it is possible to suppress the occurrence of spark discharge as in the conventional electric dust collector.

  Further, even if the size of the non-dust collecting electrode 13 or the dust collecting electrode 15 is increased in order to increase the amount of dust collection, and the number of the support members 23 for supporting the non-dust collecting electrode 13 is increased, the non-dust collecting electrode 13 The leakage current from can be reduced as much as possible.

  Moreover, according to the electrostatic precipitator 1, since the power feeding member 25 is made of metal and bites into the non-dust collecting electrode 13 made of resin, the power feeding member 25 and the non-dust collecting electrode 13 are electrically connected to each other. The electrical resistance between the power supply member 25 and the non-dust collecting electrode 13 can be reduced, and power feeding (high voltage application) to the non-dust collecting electrode 13 can be accurately performed. Can do. In the non-dust collecting electrode 13 made of a semiconductive material, for example, a skin layer (insulating layer) may be partially formed (for example, thin on the surface) during molding. When 25 penetrates into the non-dust collecting electrode 13, even if the skin layer exists, the power feeding member 25 penetrates into the non-dust collecting electrode 13 through this skin layer, Power can be accurately supplied.

  Further, according to the electrostatic precipitator 1, the power supply member 25 is in contact with the voltage maintaining member 17 and is supplied with electric power from the voltage maintaining member 17. That is, the voltage maintaining member 17 serves both to support the support member 23 and to supply power to the power supply member 25, and simplifies the configuration of the dust collecting unit 5.

  Further, if the support member 23 is made of a semiconductive material, it is possible to apply a voltage to the non-dust collecting electrode 13 via the voltage maintaining member 17 and the support member 23 in addition to the power supply member 25, and more uniform. A voltage can be applied to the non-dust collecting electrode 13.

  Furthermore, according to the electrostatic precipitator 1, the voltage maintaining member 17 is provided on both sides in the width direction of the casing 21, and the wind of the electrostatic precipitator 1 (the wind by the fan 7 for collecting dust) flows through this portion. Since this is a place that is out of the place (part where the non-dust collecting electrode 13 and the dust collecting electrode 15 are alternately provided), dust in the air is attached to the surface of the voltage maintaining member 17 and the surrounding casing 21. It has become difficult. Therefore, current leakage due to dust adhesion can be prevented.

  Further, since the non-dust collecting electrode 13 and the dust collecting electrode 15 are arranged as described above (arranged in a so-called comb shape), the passage of air generated by the fan 7 (the non-dust collecting electrode 13 and the non-dust collecting electrode 13). It is easy to increase the size of the passage where the dust collecting electrode 15 is disposed and to reduce the resistance (resistance to the wind flow by the fan 7).

  Further, according to the electrostatic precipitator 1, the support member 23 and the power feeding members 25 and 31 are engaged with the non-dust collection electrodes 13 and the dust collection electrodes 15 at the edges of the non-dust collection electrodes 13 and the dust collection electrodes 15. In addition, since each non-dust collecting electrode 13 and each dust collecting electrode 15 are supported, assembly of each non-dust collecting electrode 13 and each dust collecting electrode 15 is facilitated.

It is a figure which shows notionally the electrostatic precipitator 1 which concerns on embodiment of this invention. FIG. 4 is a perspective view showing a schematic configuration of the charging unit 3 and the dust collecting unit 5 and is a view of the charging unit 3 and the dust collecting unit 5 as viewed from the dust collecting unit 5 side. FIG. 3 is a perspective view showing a schematic configuration of the charging unit 3 and the dust collecting unit 5, and is a view of the charging unit 3 and the dust collecting unit 5 viewed from the charging unit 3 side. In FIG. 3, it is a figure which shows the state which isolate | separated the charge part 3 and the dust collection part 5. In FIG. FIG. 3 is an exploded perspective view of the dust collection unit 5. It is a figure which shows the state which assembled | attached the non-dust collection electrode 13 and the dust collection electrode 15, Comprising: The non-dust collection electrode 13 from the thickness direction of each plate-shaped non-dust collection electrode 13 or each plate-shaped dust collection electrode 15 It is the figure which looked at the dust collection electrode 15. FIG. 6 is a view corresponding to FIG. 5 and showing a state in which only the non-dust collecting electrode 13 is assembled. FIG. 6 is a view corresponding to FIG. 5 and showing a state in which only the dust collection electrode 15 is assembled. It is a figure which shows the IX-IX cross section in FIG. It is a figure which shows the XX cross section in FIG. It is a figure which shows the XI-XI cross section in FIG. FIG. 3 is a diagram illustrating a schematic configuration of a voltage maintaining member 17. It is a top view (Drawing 13 (a)) and a front view (Drawing 13 (b)) of voltage maintenance member 17. It is a figure which shows the test result of the electric dust collector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric dust collector 3 Charging part 5 Dust collection part 13 Non-dust collection electrode 15 Dust collection electrode 17 Voltage maintenance member 19, 21 Case 23 Support member 25 Power supply member 31 Grounding member

Claims (5)

A non-dust collecting electrode composed of a semiconductive material;
A dust collecting electrode made of a conductive material;
A support member made of an insulating material or a semiconductive material and supporting the non-dust collecting electrode in contact with the non-dust collecting electrode;
A voltage maintaining member made of a conductive material, supporting the support member in contact with the support member, and being applied with a voltage equal to or substantially equal to a voltage applied to the non-dust collecting electrode;
A power supply member made of a conductive material and supplying power to the non-dust collecting electrode;
A dust collecting part of an electric dust collector, characterized by comprising: In the dust collector of the electric dust collector according to claim 1,
The dust collector of an electric dust collector, wherein the power supply member is made of metal. In the dust collecting part of the electric dust collector according to claim 1 or 2,
The dust collecting unit of the electric dust collector, wherein the power feeding member is in contact with the voltage maintaining member and is supplied with electric power from the voltage maintaining member. A casing that is open in the height direction by being formed into a rectangular cylinder with an insulating material;
A plurality of non-dust collecting electrodes formed of a semiconductive material in the form of a rectangular thin plate;
A plurality of dust collecting electrodes formed in a rectangular thin plate shape with a conductive material;
A plurality of slits for supporting each non-dust-collecting electrode are provided at predetermined intervals in the length direction. The slits are formed in a rod shape with an insulating material or a semiconductive material. A supporting member that integrally supports the non-dust collecting electrodes so that the non-dust collecting electrodes are arranged at predetermined intervals in the thickness direction by bringing the non-dust collecting electrodes into contact with each other;
A plurality of slits that are formed in a rod shape by a conductive material and support the dust collecting electrodes are provided at predetermined intervals in the length direction, and the portions of the non-dust collecting electrodes are provided in the slits. A power feeding member that feeds power to each of the non-dust collecting electrodes by bringing them into contact with each other;
It is formed in a band shape with a conductive material, extends in the longitudinal direction of the casing, is provided at the end in the width direction of the casing, and is provided integrally with the casing inside the casing. The dust collecting electrode, the support member, and the power supply member enter the inside of the housing, and come into contact with the ends of the support member in the longitudinal direction and the ends of the power supply member, so that the support member and the power supply A voltage maintaining member supporting the support member such that the member is integral with the housing;
A plurality of slits for supporting each dust collecting electrode are provided at predetermined intervals in the length direction, and are formed in a rod shape with a conductive material, and each dust collecting electrode portion is provided in each slit. By bringing the dust collecting electrodes into contact with each other, the dust collecting electrodes are integrally supported so as to be arranged at a predetermined interval in the thickness direction and power is supplied to the dust collecting electrodes. The dust collecting electrodes are separated from the non-dust collecting electrodes and alternately enter between the non-dust collecting electrodes inside the housing, so that the dust collecting electrodes are integrated with the housing. A grounding member provided at the inner side of the casing, with each end in the longitudinal direction being integrally supported by the casing;
A dust collecting part of an electric dust collector, characterized by comprising: The dust collection part according to any one of claims 1 to 4;
A charging unit that charges dust in the air to collect dust in the dust collection unit;
A fan for flowing air from the charging unit to the dust collecting unit;
An electric dust collector characterized by comprising:

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