JP2006281173A - Electric dust collecting filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric dust collecting filter capable of preventing a leakage current from flowing from the end part of an electrode sheet to which high voltage is applied to the electrode sheet of the other pole. <P>SOLUTION: An insulation belt 2 for leakage prevention is provided on the peripheral edge part of the surface of a rectangular insulating plate 1, a belt-like electrode belt 4 composed of a charge material is provided in an internal dust collecting area 3 surrounded by the insulation belt 2, and the electrode sheet 5 is formed. A spacer part 6 is held between the electrode sheets 5 and laminated, and different voltages (-5 KV and a ground potential) are applied to every other laminated electrode sheet 5. Thus, even in the case of use under the disadvantageous condition of a high temperature and high humidity, the leakage current is prevented from flowing from the end part of the electrode sheet 5 to which the high voltage is applied to the other electrode sheet 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric dust collecting filter used in an electric dust collector.

  2. Description of the Related Art Conventionally, an electric dust collection filter formed in a band shape is known as an example of this type of electric dust collection filter (see, for example, Patent Document 1).

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

As shown in the figure, a plurality of cut and raised pieces 102 are cut and raised from the strip-shaped negative electrode 101 in a triangular shape along the air blowing direction A, and the tip 102a of the curved surface of the cut and raised piece 102 is brought into contact with the strip-shaped positive electrode 103. The air passages of the strip-shaped negative electrode 101 and the strip-shaped positive electrode 103 are cut and raised, and are held by a piece 102 at a constant interval.
JP-A-6-31200 ([0012], FIG. 1)

  In such a conventional electrostatic precipitating filter, the strip-shaped negative electrode 101 and the strip-shaped positive electrode 103 are held at regular intervals by the cut and raised pieces 102, but when used under disadvantageous conditions of high temperature and high humidity. However, there is a problem that a leakage current is generated between the electrodes and the dust collection function cannot be exhibited, and it is required to prevent the generation of the leakage current even when used under disadvantageous conditions.

  The present invention solves such a conventional problem and provides an electrostatic dust collection filter capable of preventing leakage current from flowing from an end portion of an electrode sheet applied to a high voltage to an electrode sheet of another electrode. The purpose is that.

  In order to achieve the above object, the electric dust collection filter of the present invention has a rectangular insulating plate, an insulating band for preventing leakage provided at the peripheral edge of the surface of the insulating plate, and an inner part surrounded by the insulating band. A dust collecting area, an electrode sheet provided with a strip-shaped electrode band made of a charged substance in the dust collecting area, and a spacer portion provided between the electrode sheets, and sandwiching the spacer portion between the electrode sheets And collecting dust by alternately applying different voltages to the electrode sheet.

  By this means, an electric dust collection filter capable of preventing leakage current from flowing can be obtained.

  Another means is that the distance between the electrode sheets is set to 2 mm or less, the voltage difference between the electrode sheets is set to 5 KV to 7 KV, and the width of the insulating band is set to 4 mm or more.

  By this means, it is possible to obtain an electric dust collection filter that can prevent the occurrence of leakage current even if there are variations in dimensions.

  Another means is to provide a blank portion without a conductive material in a dust collecting region of the electrode sheet so that the electrode strip is not divided.

  By this means, it is possible to obtain an electric dust collection filter capable of reducing the cost by reducing the conductive material used for the electrode strip.

  Another means is to connect a blank portion having no conductive material and an insulating band for preventing leakage.

  By this means, an electrostatic dust collection filter that can reduce the possibility of leakage current is obtained.

  Another means is to form a belt-like planar convex portion in the dust collection region of the insulating plate and apply a liquid conductive material to the planar convex portion to form an electrode strip.

  By this means, it is possible to obtain an electric dust collecting filter that can easily manufacture the electrode strip.

  Another means is to form a flat recess in the dust collection region of the insulating plate and insert a solid conductive material into the flat recess to form an electrode strip.

  By this means, it is possible to obtain an electric dust collecting filter that can easily assemble the electric dust collecting portion.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical dust collection filter which has the effect that it can prevent that a leak current generate | occur | produces from the edge part of an electrode sheet can be provided.

  Moreover, even when used in a high temperature and high humidity environment, even when there are variations in dimensions, it is possible to provide an electric dust collection filter that is effective in preventing the occurrence of leakage current and maintaining the dust collection function.

  In addition, it is possible to provide an electric dust collection filter that is effective in reducing costs.

  In addition, it is possible to provide an electric dust collection filter that is effective in reducing the possibility of occurrence of leakage current.

  In addition, it is possible to provide an electrostatic dust collection filter having an effect that the electrode strip can be easily manufactured.

  Further, it is possible to provide an electric dust collection filter having an effect that the electric dust collection unit can be easily assembled.

  The invention according to claim 1 of the present invention includes a rectangular insulating plate, an insulating band for preventing leakage provided on the peripheral edge of the surface of the insulating plate, and an internal dust collection region surrounded by the insulating band. An electrode sheet provided with a strip-shaped electrode band made of a charged substance in the dust collection region, and a spacer part provided between the electrode sheets, and the electrode sheet is laminated with the spacer part sandwiched between the electrode sheets. Dust is collected by alternately applying different voltages to the electrode sheet every other time, and even when used under disadvantageous conditions of high temperature and humidity, the end of the electrode sheet applied at high pressure in the electric dust collector It is possible to prevent leakage current from flowing from the electrode to the electrode sheet of the other electrode.

  In the invention according to claim 2, the distance between the electrode sheets is set to 2 mm or less, the voltage difference between the electrode sheets is set to 5 KV to 7 KV, and the width of the insulating band is set to 4 mm or more. Since the distance between them is as short as 2 mm, the provision of an insulating band of 4 mm or more at the end of the electrode sheet has the effect of preventing the occurrence of leakage current even if there is a variation in dimensions.

  In the invention according to claim 3, the electrode sheet is provided with a blank portion having no conductive material in a dust collecting area of the electrode sheet, and the electrode band is not divided and is connected to a high voltage power source. Therefore, the electric field area extends and expands in the blank area, so there is no decrease in the Coulomb force acting on the charged dust, the dust collection function can be maintained properly, and the conductive material used for the electrode strip is reduced. Thus, the cost can be reduced.

  According to a fourth aspect of the present invention, a blank portion having no conductive material is connected to an insulating band for leakage prevention, and the blank portion and the insulating band are connected in an area where the dust collection efficiency of the electrode sheet is low. Since the creepage distance from the end of the electrode sheet of the electrode band can be increased, the possibility of occurrence of leakage current can be reduced.

  According to a fifth aspect of the present invention, a belt-like flat convex portion is formed in a dust collection region of the insulating plate, and a liquid conductive material is applied to the flat convex portion to form an electrode band, which is provided on the insulating plate. The electrode band can be formed simply by directly applying the liquid conductive material to the planar convex portion with a roller, and there is an effect that a printing process using a block or the like is not required, and it can be easily manufactured.

  According to a sixth aspect of the present invention, a flat concave portion is formed in a dust collection region of an insulating plate, and a solid conductive material is inserted into the flat concave portion to form an electrode band. The electrode band can be reliably formed at a position that keeps the insulation distance only by being fitted into the planar recess, and the electric dust collecting part can be easily assembled.

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

(Embodiment 1)
As shown in FIGS. 1 to 3, a rectangular insulating plate 1, a leak-proof insulating band 2 provided at the peripheral edge of the surface of the insulating plate 1, and an internal dust collection region surrounded by the insulating band 2 3, a dust collection region 3, and a spacer portion 6 provided between the electrode sheets 5 in which the dust collection region 3 is provided with a belt-like electrode belt 4 made of a belt-like substance. Laminate with spacer part 6 in between, and provide different voltage (-5KV and ground potential) from every other electrode sheet 5 laminated by high voltage power supply part 7 to form electric dust collecting filter A charging unit (not shown) for charging negative ions to the dust in the air is disposed on the upstream side of the electric dust collection filter.

  The distance a between the electrode sheets 5 is set to 2 mm or less, the voltage difference between the electrode sheets 5 is set to 5 KV to 7 KV, the width b of the insulating band 2 is formed to 4 mm or more, and the dust collection area of the electrode sheet 5 3 is provided with a blank portion 8 having no conductive material so that the electrode band 4 is not divided.

  In the above configuration, when dust charged by negative ions passes between the electrode sheets 5, Coulomb force acts and is collected on the grounded electrode sheet 5 side. At this time, the grounded electrode The blank portion 8 provided on the sheet 5 is hardly energized, but a strong electric field is formed so as to cover the blank portion 8, and the distance traveled by the dust is sufficiently long with respect to the distance a between the electrode sheets 5. Therefore, even when the blank portion 8 is provided in the electrode sheet 5, it can be used without impairing the dust collecting ability.

  Table 1 shows the results of testing the width b of the insulating band 2 and the appearance tendency of leakage current.

As is clear from this (Table 1), it can be seen that no leakage current appears when the width b of the insulating band 2 is 4 mm or more.

  As described above, according to the first embodiment, the insulating band 2 for preventing leakage is provided at the peripheral edge of the surface of the rectangular insulating plate 1, and the dust collection region 3 surrounded by the insulating band 2 is charged. An electrode sheet 5 is formed by providing a strip-shaped electrode band 4 made of a material, and the electrode sheet 5 is laminated with a spacer portion 6 interposed therebetween, and different voltages (−5 KV and grounding) are provided for every other electrode sheet 5 laminated. The potential is applied to the other electrode sheet 5 from the end of the electrode sheet 5 applied at a high pressure in the electrostatic precipitating filter when used under disadvantageous conditions of high temperature and humidity. Can be prevented from flowing.

  In the present embodiment, the high voltage power supply unit applies −5 KV and ground potential to every other stacked electrode sheet, but +5 KV and +5 KV electrode sheet are applied so that the ground potential is applied. Dust may be attached to the side.

  Further, the distance a between the electrode sheets 5 is set to 2 mm or less, the potential difference between the electrode sheets 5 is set to 5 KV to 7 KV, and the width of the insulating band 2 is set to 4 mm or more. As shown below (Table 1), the leakage current can be prevented by providing an insulating band 2 of 4 mm or more at the end of the electrode sheet 5, and even if there is a variation in dimensions, the leakage current Can be prevented.

  In addition, a blank part 8 without a conductive material is provided in the dust collection region 3 of the electrode sheet 5 so that the electrode band 4 is not divided, and the electrode band 4 is connected to the high-voltage power supply part 7 without being divided. Since the electric field region formed between the electrode sheets 5 stacked one above the other extends over the blank portion 8 and the Coulomb force acting on the charged dust is reduced, the dust collection function can be maintained properly. In addition, the conductive material used for the electrode strip 4 can be reduced and the cost can be reduced.

(Embodiment 2)
As shown in FIG. 4, an electrode sheet 5A is formed by connecting a blank portion 8A having no conductive material and an insulating band 2A for preventing leakage.

  In the above configuration, since the blank portion 8A and the insulating band 2A are connected in an area where the dust collection efficiency of the electrode sheet 5A is low, the creeping distance from the end of the electrode sheet 5A of the electrode band 4A can be increased. .

  As described above, according to the second embodiment, since the blank portion 8A having no conductive material is connected to the insulating band 2A for preventing leakage, the creeping distance from the end of the electrode sheet 5A of the electrode band 4A can be increased. As a result, the possibility of occurrence of leakage current can be reduced.

(Embodiment 3)
As shown in FIGS. 5 and 6, a belt-like planar convex portion 9 is formed in the dust collection region 3A of the insulating plate 1A, and a liquid conductive material 10 such as conductive ink is applied to the planar convex portion 9 to form an electrode strip 4B. To form an electrode sheet 5B.

  In the above configuration, the electrode strip 4B can be formed by directly applying the liquid conductive material 10 made of conductive ink or the like to the planar convex portion 9 provided on the insulating plate 1A with a roller.

  As described above, according to the invention of the third embodiment, the belt-like flat convex portion 9 is formed in the dust collection region 3A of the insulating plate 1A, and the liquid conductive material 10 is applied to the flat convex portion 9, so The used printing process becomes unnecessary, and the electrode sheet 5B can be easily manufactured.

(Embodiment 4)
As shown in FIGS. 7 and 8, a planar recess 11 is formed in the dust collection region 3B of the insulating plate 1B, and a solid conductive material 12 such as an aluminum plate is inserted into the planar recess 11 to form an electrode band 4C. The sheet 5C is configured.

  In the above configuration, by inserting the solid conductive material 12 such as an aluminum plate into the planar recess 11, the electrode strip 4 </ b> C can be reliably formed at a position where the creepage distance is maintained.

  As described above, according to the fourth embodiment, the planar recess 11 is formed in the dust collection region 3B of the insulating plate 1B, and the electrode band 4C is formed by inserting the solid conductive material 12 into the planar recess. Thus, the electrode band 4C can be formed at a position where the electric dust is kept, and the electrostatic dust collecting filter can be easily assembled.

  Since it is possible to realize a highly efficient and safe electrical dust collection filter with low pressure loss, it can be applied to applications incorporated in air conditioning equipment such as air conditioners.

The perspective view of the electric dust collection filter of Embodiment 1 of this invention Cross section of the electric dust filter Side view showing the electric field between the electrode sheets of the electric dust filter The top view of the electrode sheet of the electric dust collection filter of Embodiment 2 of this invention Sectional drawing of the electric dust collection filter of Embodiment 3 of this invention Plan view of electrode sheet of the same electric dust filter Sectional drawing which shows the press injection of the solid electrically-conductive substance of the electric dust collection filter of Embodiment 4 of this invention Plan view of electrode sheet of the same electric dust filter (A) The schematic plan view which shows the state accommodated in the housing of the conventional electrostatic dust filter (b) The exploded perspective view of the electrical dust filter

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation board 1A Insulation board 1B Insulation board 2 Insulation band 2A Insulation band 3 Dust collection area 3A Dust collection area 3B Dust collection area 4 Electrode band 4A Electrode band 4B Electrode band 4C Electrode band 5 Electrode sheet 6 Spacer part 8 Blank part 8A Blank Part 9 Flat convex part 10 Liquid conductive substance 11 Flat concave part 12 Solid conductive substance

Claims (6)

A rectangular insulating plate, an insulating band for leakage prevention provided on the peripheral edge of the surface of the insulating plate, an internal dust collection area surrounded by the insulating band, and a strip shape made of a charged substance in the dust collection area The electrode sheet is provided with an electrode sheet and a spacer portion provided between the electrode sheets, and the electrode sheet is laminated with the spacer portion sandwiched between the electrode sheets. An electric dust collection filter that collects dust when applied to the filter. The electrostatic precipitating filter according to claim 1, wherein the distance between the electrode sheets is 2 mm or less, the voltage difference between the electrode sheets is 5 KV to 7 KV, and the width of the insulating band is 4 mm or more. The electric dust collection filter according to claim 1 or 2, wherein a blank portion having no conductive material is provided in a dust collection region of the electrode sheet so that the electrode strip is not divided. The electrostatic precipitating filter according to claim 3, wherein a blank portion having no conductive material is connected to an insulating band for preventing leakage. The electrostatic precipitating filter according to any one of claims 1 to 3, wherein a belt-like planar convex portion is formed in a dust collection region of the insulating plate, and a liquid conductive material is applied to the planar convex portion to form an electrode strip. The electric dust collection filter according to any one of claims 1 to 3, wherein a planar concave portion is formed in a dust collection region of the insulating plate, and a solid conductive material is inserted into the planar concave portion to form an electrode band.

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