JP2013034516A - Active species generating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety by increasing the creepage distance between a needle electrode and a counter electrode to discharge in a large area.SOLUTION: An active species generating apparatus includes a discharge electrode 15 which has a distal end side inserted into a cylindrical case 13 from an end opening of the case 13, and an insulating substrate 14 having a hole 16, an adsorption means 17 arranged in the circumference of the hole 16, and the counter electrode 18 for energizing the adsorption means 17. The discharge electrode 15 is held at a position keeping a predetermined space in the case 13 by a first holding part 20 and a second holding part 21 arranged one by one from one end opening side toward the other end opening side in the case 13. The first holding part 20 and the second holding part 21 has a ventilation opening through which blowing air that flows from the one end opening of the case toward the other end opening passes and are formed with an insulating material.

Description

  The present invention relates to an active species generator that performs sterilization and deodorization of indoor spaces.

  In recent years, active species generators have been developed that supply active species such as radicals into the air and purify the air by the cleaning action of the active species.

  This type of active species generating device includes a main body case, a discharge electrode, a counter electrode facing the discharge electrode, a power supply unit for applying a voltage to the discharge electrode and the counter electrode, and a surface of the counter electrode. It was the structure provided with the adsorption | suction means provided in (for example, refer patent document 1).

JP 2006-320613 A

  In the above-described conventional active species generator, a voltage is applied between the discharge electrode and the counter electrode to cause corona discharge, thereby decomposing moisture adsorbed on the adsorption means and generating active species. It was.

  In such a configuration, dust may adhere to the tip of the discharge electrode, and the generation of active species may become unstable.

  Therefore, conventionally, a filter is provided on the upstream side of the discharge electrode to reduce dust adhesion. However, since the fine dust passes, there are cases where the fine dust adheres to the tip of the discharge electrode.

  In view of the above, an object of the present invention is to suppress the adhesion of fine dust to the tip of the discharge electrode and stabilize the generation of active species.

  In order to achieve this object, the present invention provides a cylindrical case part, a discharge electrode having its tip side inserted into the case part from one end opening of the case part, and a tip side of the discharge electrode. An insulating substrate disposed oppositely at a predetermined interval, and the insulating substrate includes a hole portion disposed at a portion facing the front end side of the discharge electrode, and suction means disposed on an outer periphery of the hole portion; A first electrode arranged sequentially from one end opening side to the other end opening side of the case portion at a predetermined distance in the case portion. The first and second holding portions have ventilation openings through which air flowing from one end opening to the other end opening of the case portion passes. 1. Form the second holding part with insulating material. Constructed and was said to the counter electrode and the discharge electrode and configured to apply a voltage from the power supply unit, thereby it is to achieve the intended purpose.

  As described above, the present invention includes a cylindrical case portion, a discharge electrode having its tip side inserted into the case portion from one end opening of the case portion, and a predetermined interval on the tip side of the discharge electrode. An insulating substrate disposed opposite to the insulating substrate, the insulating substrate including a hole disposed in a portion facing the front end side of the discharge electrode, an adsorbing unit disposed on an outer periphery of the hole, and an electric current supplied to the adsorbing unit A first electrode and a second holding electrode arranged sequentially from one end opening side to the other end opening side of the case portion at a predetermined distance in the case portion. The first and second holding parts have a ventilation opening through which air flowing from one end opening to the other end opening of the case part passes and the first and second holding parts. The holding portion is made of an insulating material, The said discharge electrode and counter electrode which was a configuration for applying a voltage from the power source unit, the adhesion of fine dust to the tip of the discharge electrode is suppressed, the generation of active species can be stabilized.

  That is, since the first holding part and the second holding part are formed of an insulating material, when a voltage is applied to the counter electrode and the discharge electrode by the power supply part, the first holding part and the second holding part Are charged. Here, when the blown air passes through the ventilation openings of the charged first holding unit and the second holding unit, fine dust is generated by the electrostatic force of the first holding unit and the second holding unit. Adsorb to the part.

  That is, when the blown air passes through the ventilation openings of the first holding part and the second holding part, the fine dust is adsorbed by the electrostatic force, and the air with the reduced fine dust is the tip of the discharge electrode. Therefore, it is possible to suppress the adhesion of fine dust to the tip of the discharge electrode and stabilize the generation of active species.

The perspective view of the active species generator in Embodiment 1 of this invention Cross section of the active species generator Exploded perspective view of the active species generator Enlarged view of main parts of the active species generator Diagram showing the concept of positive corona discharge in the same active species generator The figure which shows the concept of the minus corona discharge in the same activated species generator

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

  FIG. 1 shows an external view of the active species generator 1. The active species generator 1 purifies air by supplying active species such as radicals into the air in the room, and thereby cleans the active species.

  FIG. 2 shows a cross section of the active species generator 1 in FIG.

  The active species generator 1 includes a main body case 5 having an intake port 3 and an exhaust port 4, active species generating means 6 provided in the main body case 5, an air blowing means 7, and a power supply unit 2. .

  The main body case 5 has a substantially box shape and includes an exhaust port 4 on the top surface and an intake port 3 on the side surface. A blowing means 7 is provided opposite to the intake port 3. The air blowing means 7 is formed of a scroll-shaped casing 8, an electric motor 9 provided in the casing 8, and blades 10 rotated by the electric motor 9.

  The casing 8 includes a circular suction port 11 on the side surface and a discharge port 12 on the top surface. The suction port 11 of the casing 8 faces the intake port 3 of the main body case 5. Active species generating means 6 is provided in the air path between the discharge port 12 of the casing 8 and the exhaust port 4 of the main body case 5. Indoor air is sucked from the air inlet 3 of the main body case 5 by the air blowing means 7 and is blown into the room from the air outlet 4 through the active species generating means 6.

  As shown in FIG. 3, the active species generating means 6 is inserted into the case portion 13 from the cylindrical case portion 13 and one end opening (lower side in FIG. 3) of the case portion 13. A rod-shaped discharge electrode 15 and a flat plate-shaped insulating substrate 14 disposed opposite to each other at a predetermined interval on the front end side of the discharge electrode 15 are provided.

  The material of the discharge electrode 15 is SUS, tungsten, or the like that causes corona discharge. The discharge electrode 15 is formed of a single material. Thereby, the durability of the discharge electrode 15 can be improved as compared with the case where a treatment such as plating is performed.

  The insulating substrate 14 includes a hole 16 that is a circular hole at a portion facing the tip side of the discharge electrode 15, and the inner periphery of the hole 16 and the discharge electrode 15 side of the insulating substrate 14 (see FIG. 3). The suction means 17 is arranged at the periphery of the hole 16 on the lower surface.

A ring-shaped conductive portion 28 is provided on the outer periphery of the hole portion 16 on the discharge electrode 15 side, and a counter electrode 18 is provided at a corner portion of the conductive portion 28. The insulating substrate 14 may be a ceramic substrate or a resin substrate such as fluorine. The ceramic substrate may be a substrate containing any one of silica, aluminum, and magnesium, or an alumina substrate. This is because an inorganic material or a fluororesin that is not easily corroded by ozone or radicals may be used. The surface resistance of the ceramic is preferably 10 ⁶ to 10 ¹⁰ Ω / □.

  As shown in FIG. 4, the adsorbing means 17 is formed of an adsorbent 29 that adsorbs moisture in the vicinity of the insulating substrate 14 and an adhesive 30 that adheres the adsorbent 29 and the insulating substrate 14. The adsorbent 29 is a zeolite having an average particle diameter of about 0.5 to several tens of micrometers for adsorbing water and having pores 31 on the surface. Zeolite is taken as an example of the adsorbent 29, but the adsorbent 29 has nano-level pores 31, and so-called pores 31 that can condense water vapor within the pores due to the so-called Kelvin capillary condensation phenomenon. As long as it is a porous structure having a structure having any of the above, silica, zeolite, desiccite, allophane, imogolite, etc. may be included. Further, porous alumina, porous silica, or porous titania that adsorbs water by using gaps between particles may be used. The adsorbent 29 adsorbs water vapor in the air to the pores 31, but adsorbs water vapor in the air if the pores 31 have an average particle diameter that is difficult to fill with the particles of the adhesive 30. Can do. The adsorbent 29 may have an average particle size larger than that of the adhesive 30.

  The adhesive 30 is colloidal silica that adheres the adsorbent 29 and the insulating substrate 14. The adhesive 30 may have an average particle size that is smaller than the average particle size of the adsorbent 29 such as zeolite and larger than the pores open on the surface of the zeolite. If the pores 31 are not blocked, glass powder or a silicate compound may be used as the adhesive 30.

  As shown in FIG. 3, the conductive portion 28 is located between the insulating substrate 14 and the case portion 13, and the suction means 17 and the conductive portion 28 are in contact with each other. That is, the counter electrode 18 and the suction means 17 are in an energized state. The counter electrode 18 is made of stainless steel such as SUS, aluminum, gold, silver, copper, or the like. In addition, it is not restricted to these, What is necessary is just a conductive material.

  The insulating substrate 14 and the conductive portion 28 are fixed to the case portion 13 by a fixing portion 19 that fits into the other end opening of the cylindrical case portion 13. A voltage is applied from the power supply unit 2 to the counter electrode 18 and the discharge electrode 15.

  The feature of this embodiment is that the discharge electrode 15 is held by a first holding part 20 and a second holding part 21 formed of an insulating material.

  The first holding unit 20 and the second holding unit 21 are sequentially arranged from the one end opening side of the case unit 13 toward the other end opening side at a predetermined distance in the case unit 13. . A first holding part 20 is provided on one end opening side of the case part 13, and a second holding part 21 is provided on the other end opening side of the case part 13.

  The first holding portion 20 includes a plurality of quadrangular prism-shaped first holding arms 22 extending in the central axis direction from the inner surface of the cylindrical case portion 13 and a first holding arm 22 provided between the first holding arms 22. 1 ventilation opening 24 is formed. Similarly, the second holding portion 21 is provided between the second holding arms 23 and the plurality of quadrangular columnar second holding arms 23 extending in the central axis direction from the inner surface of the cylindrical case portion 13. The second ventilation opening 25 is formed. The air that flows from the one end opening of the side opening 26 toward the other end opening by the blowing means 7 passes through the first ventilation opening 24 and the second ventilation opening 25.

  That is, since the first holding unit 20 and the second holding unit 21 are formed of an insulating material, when a voltage is applied to the counter electrode 18 and the discharge electrode 15 by the power supply unit 2, the first holding unit 20 The unit 20 and the second holding unit 21 are charged. Here, when the blown air passes through the ventilation openings of the charged first holding unit 20 and second holding unit 21, fine dust is generated by the first holding unit 20 and the second by electrostatic force. Adsorb to the two holding portions 21.

  That is, when the blown air passes through the first ventilation opening 24 that is the ventilation opening of the first holding part 20 and the second holding part 21 and the second ventilation opening 25, fine dust is generated. Is adsorbed by the force of static electricity, and air in which fine dust is reduced flows into the space where the tip of the discharge electrode 15 is located. Therefore, adhesion of fine dust to the tip of the discharge electrode 15 is suppressed, and generation of active species Can be stabilized.

  Here, a case where a positive voltage is applied to the discharge electrode 15 will be described. As shown in FIG. 5, when a discharge voltage is applied to the discharge electrode 15 by the power supply unit 2 at about 3 to 10 KV plus, a strong electric field is formed on the surface of the discharge electrode 15. Since a positive high voltage is applied to the discharge electrode 15, free electrons existing in the air flow in. At this time, since the counter electrode 18 is in a negative state, as a result, electrons move from the counter electrode 18 to the discharge electrode 15 due to movement of the electrons. This state is corona discharge, and OH radicals (an example of active species) are generated by the corona discharge force as described later.

  More specifically, the ceramic insulating substrate 14 and the adsorbent 29 are bonded by an adhesive 30. It is known that the surface of the adsorbent 29 has nano-level pores 31 and moisture in the air adsorbs moisture by condensing water vapor in the pores 31 (Kelvin capillary condensation). phenomenon). As a result, moisture in the air is adsorbed on the adsorption means 17 such as zeolite, and electrons easily flow. When a positive high voltage is applied to the discharge electrode 15 to perform a positive corona discharge, the electrons in the adsorbent 29 are attracted to the discharge electrode 15 through the conductive portion 28 with a strong force, so that the electrons move at a high speed. . When an electron collides with an oxygen molecule near the adsorbent 29, an anion of the oxygen molecule in a state where one electron is added to the oxygen molecule is generated. Thereafter, oxygen molecule anions react with water molecules adsorbed on the surface of the insulating substrate 14 to generate active species such as OH radicals. Since corona discharge occurs around the adsorbed moisture, the moisture easily reacts with the electrons, so that OH radicals can be more easily generated.

  Next, a case where a negative voltage is applied to the discharge electrode 15 as shown in FIG. 6 will be described. When a discharge voltage is applied to the discharge electrode 15 by the power supply unit 2 at minus about 3 to 10 KV, a strong electric field is formed on the surface of the discharge electrode 15. Since a negative high voltage is applied to the discharge electrode 15, free electrons are emitted into the air. The insulating substrate 14 in contact with the conductive portion 28 is on the positive side. As a result, when the electrons move, a current flows from the counter electrode 18 to the discharge electrode 15 via the conductive portion 28.

  The electrons released into the air from the discharge electrode 15 in FIG. 6 are attracted to the strong electric field of the counter electrode 18 with a strong force, so that the electrons move at high speed and collide with molecules in the air. At this time, when electrons moving at high speed collide with oxygen molecules in the air, an oxygen molecule anion in which one electron is added to the oxygen molecule is generated. Thereafter, oxygen molecule anions react with water molecules adsorbed on the surface of the insulating substrate 14 to generate OH radicals.

  By performing the so-called negative corona discharge, which is a discharge from the discharge electrode 15 applied to the negative as described above, the moisture around the adsorption means 17 reacts with electrons, thereby making it easier to generate OH radicals. It is.

  Further, a side opening 26 that is a quadrangular opening is provided in the case 13 portion between the first holding part 20 and the second holding part 21. The side opening 26 is an air passage that connects the inside of the case portion 13 and the air passage that communicates from the discharge port 12 of the casing 8 to the exhaust port 4 of the main body case 5.

  That is, indoor air is sucked from the air inlet 3 of the main body case 5 by the air blowing means 7 and flows into the case portion 13 from the first ventilation opening 24 of the first holding portion 20. Here, the air flow is divided into two directions, one flows from the other end opening of the case portion 13 to the outside of the case portion 13 through the second ventilation opening 25 of the second holding portion 21, and the other is And flows from the side opening 26 to the outside of the case 13. That is, due to the flow from the side opening to the outside of the case part 13, a part of the lump of dust collected and collected by the first holding part 20 flows out of the case part 13.

  Further, the discharge electrode 15 and the power supply unit 2 are connected by the discharge connection unit 27 through the side opening 26. As described above, the discharge electrode 15 and the power supply unit 2 can be connected by the discharge connection unit 27 without providing a new opening or the like through the side surface opening 26.

  The first holding unit 20 and the second holding unit 21 include a first holding arm 22 that is a plurality of holding arms extending from the inner peripheral surface of the case unit 13 toward the discharge electrode 15, and a second holding arm 22. A holding arm 23, a first ventilation opening 24 provided between the first holding arms 22, and a second ventilation opening 25 provided between the second holding arms 23 are provided. The side opening 26 is formed in an extended portion of the second holding arm 23 of the second holding unit 21 between the first holding unit 20 and the second holding unit 21. Specifically, the side opening 26 has a part of the lower surface of the second holding arm 23 of the second holding unit 21 between the first holding unit 20 and the second holding unit 21. It forms at least a part of the upper surface of the portion 26.

  That is, the air is sucked from the air inlet 3 of the main body case 5 by the air blowing means 7 and flows into the case portion 13 from the first ventilation opening 24 of the first holding portion 20. Here, a part of the air hits the lower surface of the second holding arm 23, further flows along the lower surface, and from the upper surface of the side opening 26 formed in the extended portion of the second holding arm 23, the case portion 13. Due to the outward flow, a part of the lump of dust collected and collected by the second holding portion 21 further flows out of the case portion 13.

  The second holding arm 23 of the second holding portion 21 is inclined from the discharge electrode 15 side toward the side opening 26 toward the other end opening side of the case portion 13.

  As a result, the air is sucked from the air inlet 3 of the main body case 5 by the blowing means 7 and flows into the case portion 13 from the first ventilation opening 24 of the first holding portion 20. Here, a part of the air hits the lower surface of the second holding arm 23, further flows along the lower surface, and out of the case portion 13 from the side opening 26 formed in the extended portion of the second holding arm 23. As a result of this flow, a part of the lump of dust collected and collected by the second holding part 21 flows further out of the case part 13.

  Further, the first ventilation opening 24 and the second ventilation opening 25 which are ventilation openings formed in the first holding part 20 and the second holding part 21 respectively are arranged in the axial direction of the case part 13. It is arranged by shifting on the outer periphery. In other words, when viewed from the one end opening side of the main body case 5, at least a part of the second holding arm 23 is positioned at the tip of the first ventilation opening 24.

  As described above, the first ventilation opening 24 and the second ventilation opening 25 are arranged so as to be shifted on the outer periphery in the axial direction of the case portion 13. The air sucked from 3 and flows into the case portion 13 from the first ventilation opening 24 of the first holding portion 20 easily hits the second holding arm 23.

  The insulating substrate 14 is disposed at the other end opening of the case portion 13. As a result, OH radicals generated from the insulating substrate 14 flow from the opening at the other end to the outside of the case part 13 due to the blowing of the air blowing means 7, so that the OH radicals can be prevented from staying in the case part 13.

  In addition, a ring-shaped fixing portion 19 for mounting the insulating substrate 14 on the other end opening of the case portion 13 is provided. The fixing portion 19 has a cylindrical shape that fits into the inner surface of the opening at the other end of the case portion 13. When the fixing portion 19 is fitted to the case portion 13, the fixing portion 19 is fitted to the inner surface of the other end opening of the case portion 13, and one end side end portion of the fixing portion 19 is in contact with the peripheral edge portion of the insulating substrate 14. The insulating substrate 14 is fixed to the case portion 13. As described above, since the peripheral portion of the insulating substrate 14 is fixed to the case portion 13 by the fixing portion 19, the inclination of the insulating substrate 14 with respect to the case portion 13 can be suppressed. As a result, the distance between the insulating substrate 14 and the discharge electrode 15 can be made uniform.

  As described above, the present invention includes a cylindrical case portion, a discharge electrode having its tip side inserted into the case portion from one end opening of the case portion, and a predetermined interval on the tip side of the discharge electrode. An insulating substrate disposed opposite to the insulating substrate, the insulating substrate including a hole disposed in a portion facing the front end side of the discharge electrode, an adsorbing unit disposed on an outer periphery of the hole, and an electric current supplied to the adsorbing unit A first electrode and a second holding electrode arranged sequentially from one end opening side to the other end opening side of the case portion at a predetermined distance in the case portion. The first and second holding parts have a ventilation opening through which air flowing from one end opening to the other end opening of the case part passes and the first and second holding parts. The holding portion is made of an insulating material, The said discharge electrode and counter electrode which was a configuration for applying a voltage from the power source unit, the adhesion of fine dust to the tip of the discharge electrode is suppressed, the generation of active species can be stabilized.

  That is, since the first holding part and the second holding part are formed of an insulating material, when a voltage is applied to the counter electrode and the discharge electrode by the power supply part, the first holding part and the second holding part Are charged. Here, when the blown air passes through the ventilation openings of the charged first holding unit and the second holding unit, fine dust is generated by the electrostatic force of the first holding unit and the second holding unit. Adsorb to the part.

  That is, when the blown air passes through the ventilation openings of the first holding part and the second holding part, the fine dust is adsorbed by the electrostatic force, and the air with the reduced fine dust is the tip of the discharge electrode. Therefore, it is possible to suppress the adhesion of fine dust to the tip of the discharge electrode and stabilize the generation of active species.

  Therefore, utilization as an air cleaner is expected.

DESCRIPTION OF SYMBOLS 1 Active species generator 2 Power supply part 3 Intake port 4 Exhaust port 5 Main body case 6 Active species generation | occurrence | production means 7 Air blower 8 Casing 9 Electric motor 10 Blade | blade 11 Suction port 12 Discharge port 13 Case part 14 Insulating substrate 15 Discharge electrode 16 Hole part DESCRIPTION OF SYMBOLS 17 Adsorption means 18 Counter electrode 19 Fixed part 20 1st holding | maintenance part 21 2nd holding | maintenance part 22 1st holding | maintenance arm 23 2nd holding | maintenance arm 24 1st ventilation opening 25 Second ventilation opening 26 Side opening Part 27 Discharge connection part 28 Conductive part 29 Adsorbent 30 Adhesive 31 Pore

Claims (8)

A cylindrical case part, a discharge electrode inserted into the case part from one end opening of the case part, and an insulating substrate disposed opposite to the front end side of the discharge electrode at a predetermined interval The insulating substrate has a hole disposed in a portion facing the tip side of the discharge electrode, a suction means disposed on the outer periphery of the hole, and a counter electrode for energizing the suction means, The discharge electrode is configured to be held by first and second holding portions sequentially arranged from one end opening side to the other end opening side of the case portion at a predetermined distance in the case portion. The first and second holding portions have ventilation openings through which air flowing from one end opening to the other end opening of the case portion passes, and the first and second holding portions are formed of an insulating material. The counter electrode and the discharge electrode Active species generating apparatus configured to apply a voltage from the power supply unit. The active species generator according to claim 1, wherein a side opening is provided in a case portion between the first and second holding portions. The active species generator according to claim 2, wherein the power supply unit and the discharge electrode are connected through a side opening of the case unit. The first and second holding portions include a plurality of holding arms extending from the inner peripheral surface of the case portion toward the discharge electrode, and a ventilation opening provided between the holding arms, and the side opening. The active species generator according to any one of claims 1 to 3, wherein the portion is formed on an extended portion of the holding arm of the second holding portion between the first and second holding portions. The active species generation according to claim 4, wherein the holding arm of the second holding part is configured to be inclined from the discharge electrode side toward the side opening and toward the other end opening of the case part. apparatus. The active species generator according to any one of claims 1 to 5, wherein the ventilation openings formed in each of the first and second holding portions are arranged so as to be shifted on the outer periphery in the axial direction of the case portion. The active species generator according to any one of claims 1 to 6, wherein the insulating substrate is disposed in the opening at the other end of the case portion. The active species generator according to claim 7, further comprising a ring-shaped fixing portion that mounts the insulating substrate on the other end opening of the case portion.

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