JP2012217536A - Active species generating unit - Google Patents

Abstract

An object of the present invention is to disperse and discharge from a wide range of discharge electrodes, so that deterioration of the discharge electrodes can be suppressed, and as a result, active species are stably generated. Is.
A main body case, a flat plate-shaped insulating substrate provided in the main body case, a rod-shaped discharge electrode disposed opposite to one surface of the insulating substrate, and an insulating property. A counter electrode 19 in contact with the substrate 16 and a power source 20 for applying a voltage to the discharge electrode 17 and the counter electrode 19 are provided. The insulating substrate 16 has a hole 21, and the inner surface of the hole 21 and the insulating substrate Adsorbing means 18 that adsorbs moisture is provided on one surface of 16, and the tip of the discharge electrode 17 is positioned approximately in the center of the hole 21.
[Selection] Figure 2

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 kind of active species generating device has a main body case, a discharge electrode, a counter electrode opposite to the discharge electrode, a power source 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 provided adsorption | suction means (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, the current flowing between the discharge electrode and the counter electrode due to corona discharge tends to flow in the shortest path from the discharge electrode to the counter electrode, which is a conductor, and therefore concentrates on a narrow range of adsorption means near the discharge electrode. There was a tendency for electrons to flow. That is, when the current concentrates in a narrow range of the adsorption means, the discharge portion of the discharge electrode is similarly concentrated and discharged from the narrow range of the discharge electrode.

  However, since discharge is concentrated from a narrow range of the discharge electrode, the discharge portion is deteriorated, and as a result, the generation of active species becomes unstable.

  Therefore, an object of the present invention is to stably generate active species.

  In order to achieve this object, the present invention provides a main body case, a flat plate-shaped insulating substrate provided in the main body case, and a rod-shaped member disposed to face one surface of the insulating substrate. A discharge electrode; a counter electrode in contact with the insulating substrate; and a power source for applying a voltage to the discharge electrode and the counter electrode. The insulating substrate has a hole, and the inner surface of the hole and the Adsorbing means for adsorbing moisture on one surface of the insulating substrate is provided, and the tip of the discharge electrode is positioned approximately in the center of the hole, thereby achieving the intended purpose. .

  As described above, the present invention includes a main body case, a flat plate-shaped insulating substrate provided in the main body case, a rod-shaped discharge electrode disposed to face one surface of the insulating substrate, A counter electrode in contact with the insulating substrate and a power source for applying a voltage to the discharge electrode and the counter electrode are provided. The insulating substrate has a hole, and an inner surface of the hole and one of the insulating substrates An adsorption means for adsorbing moisture is provided on the surface of the surface, and the tip of the discharge electrode is positioned approximately in the center of the hole, so that active species can be stably generated.

  That is, in the present invention, the inner surface of the hole portion of the insulating substrate and the one surface surface of the insulating substrate are provided with adsorption means, and the tip of the discharge electrode is positioned approximately in the center of the hole portion. When a high voltage is applied between the electrode and the counter electrode, the current flowing between the discharge electrode and the counter electrode flows through the adsorption means located around the discharge electrode provided on the insulating substrate from the discharge electrode, Will reach the electrode.

  In other words, since the suction means is located around the discharge electrode, the current is dispersed over a wide range of the suction means, and the discharge portion of the discharge electrode is similarly dispersed and discharged from the wide range of the discharge electrode. Deterioration at the discharge electrode can be suppressed, and as a result, active species can be stably generated.

1 is a perspective view of an indoor area where an active species generator according to Embodiment 1 of the present invention is installed. Cross section of the active species generator Cross section of the active species generator Side sectional view of insulating substrate and adsorption means in the same active species generator Side sectional view showing insulating substrate, adsorption means, discharge electrode, counter electrode, and support member in the same active species generator A perspective view showing an insulating substrate, a discharge electrode, and a support member in the active species generator Development view showing configurations of insulating substrate, counter electrode, and support member Top view when the insulating substrate is viewed from the counter electrode side 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.

  As shown in FIG. 1, an active species generator 3 is arranged on the floor 2 of the room 1.

  The active species generator 3 supplies the active species such as radicals to the air in the room, and thereby cleans the air by the cleaning action of the active species. In addition, by applying air containing active species to clothes, curtains, etc., effects such as deodorization and sterilization of clothes and curtains can be expected.

  FIG. 2 shows a cross-sectional view of the active species generator 3 in FIG. FIG. 3 shows a cross-sectional view of the active species generator 3 having a different component arrangement from that of FIG.

  The active species generator 3 includes a main body case 6 having an intake port 4 and an exhaust port 5, and a blower unit 7 and an active species generation unit 8 in the main body case 6.

  The main body case 6 is divided into an air passage portion 10 that communicates the intake port 4 and the exhaust port 5 and a space portion 11 by a partition plate portion 9 that is positioned substantially in the center.

  The air blowing means 7 is formed of an electric motor 12 fixed to the partition plate portion 9 of the main body case 6, a blade portion 13 rotated by the electric motor 12, and a casing portion 14 surrounding the blade portion 13. The suction port 15 of the casing part 14 faces the intake port 4 of the main body case 6. The air sucked from the intake port 4 by the blowing unit 7 is blown to the exhaust port 5 through a part of the active species generating unit 8.

  The active species generating means 8 includes an insulating substrate 16, a discharge electrode 17 disposed opposite to the insulating substrate 16, an adsorption means 18 in contact with the insulating substrate 16, a counter electrode 19, and a power source 20. Forming.

The insulative substrate 16 has a flat plate-like hole 21 that is open at substantially the center, and the end of the insulative substrate 16 is fixed to the partition plate portion 9 of the main body case via the support member 22. In the component arrangement of FIG. 2, a part of the air sucked from the intake port 4 by the blower 7 passes through the periphery of the discharge electrode 17 and is blown to the exhaust port 5 through the hole 21. In the component arrangement of FIG. 3, the hole portion 21 faces the exhaust port 5 of the main body case 6, and a part of the air sucked from the intake port 4 by the air blowing means 7 passes around the discharge electrode 17, The air is sent to the exhaust port 5 through the hole 21. The insulating substrate 16 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 insulating substrate 16 is desirably 10 ¹⁰ Ω / □ or more.

  The discharge electrode 17 has a rod shape, faces one side of the insulating substrate 16 and the hole 21, and is disposed on the windward side of the insulating substrate 16. In the arrangement of FIG. 3, the rod-shaped discharge electrode 17 extends in parallel with the blowing direction of the air blown by the blowing means 7. The tip of the discharge electrode 17 is located approximately inward of the hole 21 at a predetermined distance of several millimeters to several tens of millimeters from the insulating substrate 16. The material of the discharge electrode 17 is stainless steel such as SUS that causes corona discharge, tungsten, or the like.

The counter electrode 19 is formed of stainless steel such as SUS, aluminum, gold, silver, copper, or the like, and is fixed to the peripheral edge of the insulating substrate 16. In addition, it is not restricted to these, What is necessary is just a conductive material. The surface resistance of the counter electrode 19 is desirably 10 ⁻¹ Ω / □ or less.

  The power source 20 is located in the space 11 of the main body case 6 and applies a voltage to the discharge electrode 17 and the counter electrode 19.

The suction means 18 is provided on the surface on one side of the insulating substrate 16, that is, on the windward surface of the insulating substrate 16 and the inner surface of the hole 21, and is in contact with the counter electrode 19. The surface resistance of the suction means 18 is preferably 10 ⁶ to 10 ¹⁰ Ω / □.

  This will be described with reference to FIGS. 4, 5, 6, 7 and 8. FIG. 4 is a sectional side view of the insulating substrate 16 and the suction means 18. FIG. 5 is a side sectional view showing the insulating substrate 16, the suction means 18, the discharge electrode 17, the counter electrode 19, and the support member 22 in the component arrangement of FIG. 3. FIG. 6 is a perspective view showing the insulating substrate 16, the discharge electrode 17, and the support member 22. FIG. 7 is a development view showing the configuration of the insulating substrate 16, the discharge electrode 17, the counter electrode 19, and the support member 22. FIG. 8 is a plan view of the insulating substrate 16 as viewed from the discharge electrode 17 side.

  As shown in FIG. 4, the adsorbing means 18 is formed of an adsorbent 23 that adsorbs moisture in the vicinity of the insulating substrate 16 and an adhesive 24 that adheres the adsorbent 23 and the insulating substrate 16. The adsorbent 23 is a zeolite having an average particle diameter of 0.5 to several tens of micrometers that adsorbs water and having pores 25 on the surface. In addition, although the zeolite was mentioned as an example as the adsorbent 23, the adsorbent 23 has nano-level pores 25, and the pores 25 in which water vapor can be condensed in the pores by 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 23 adsorbs water vapor in the air to the pores 25, but adsorbs water vapor in the air if the pores 25 have an average particle diameter that is difficult to be filled with the particles of the adhesive 24. Can do. The adsorbent 23 may have an average particle size larger than that of the adhesive 24.

  The adhesive 24 is colloidal silica that adheres the adsorbent 23 and the insulating substrate 16. Note that the adhesive 24 may have an average particle size smaller than the average particle size of the adsorbent 23 such as zeolite and larger than the pores 25 opened on the surface of the zeolite. If the pores 25 are not blocked, glass powder or a silicate compound may be used as the adhesive 24.

  Here, a case where a positive voltage is applied to the discharge electrode 17 as shown in FIG. 9 will be described. As shown in FIG. 9, when a discharge voltage is applied to the discharge electrode 17 by the power source 20 at about 3 to 10 kV plus, a strong electric field is formed on the surface of the discharge electrode 17. Since a positive high voltage is applied to the discharge electrode 17, free electrons existing in the air flow in. At this time, since the counter electrode 19 is in a minus state, electrons move from the counter electrode 19 to the discharge electrode 17 as a result of 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 16 and the adsorbent 23 are bonded by an adhesive 24. It is known that the surface of the adsorbent 23 has nano-level pores 25, and moisture in the air adsorbs moisture by condensing water vapor in the pores 25 (Kelvin capillary condensation). phenomenon). As a result, moisture in the air is adsorbed on the adsorption means 18 such as zeolite, and electrons easily flow. When a positive high voltage is applied to the discharge electrode 17 to perform a positive corona discharge, the electrons in the adsorbent 23 are attracted to the discharge electrode 17 with a strong force, so that the electrons move at a high speed. When an electron collides with an oxygen molecule near the adsorbent 23, 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 16 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.

  A feature of the present embodiment is that the suction means 18 is provided on the inner surface of the hole 21 of the insulating substrate 16 and the one surface of the insulating substrate 16, and the tip of the discharge electrode 17 is located at the substantially inner center of the hole 21. It is a point to be located. Thereby, when a high voltage is applied between the discharge electrode 17 and the counter electrode 19, the current flowing between the discharge electrode 17 and the counter electrode 19 is changed from the discharge electrode 17 to the periphery of the discharge electrode 17 provided on the insulating substrate 16. After flowing through the suction means 18 located at, the counter electrode 19 is reached.

  That is, since the suction means 18 is located around the discharge electrode 17 in the circumferential direction, the current is uniformly distributed over a wide range of the suction means 18, and the discharge is uniformly distributed over a wide range. As a result, active species can be stably generated. Further, the discharge portion of the cylindrical rod-shaped discharge electrode 17 has a circular cross-sectional shape at the tip portion, so that discharge is generated in a wide range in the circumferential direction around the discharge electrode 17. As a result, compared to the case where a needle-like discharge electrode having a sharp tip is used, local discharge concentration is less likely to occur, deterioration of the discharge electrode 17 can be suppressed, and active species are stably generated as a result. It is something that can be done. Furthermore, since the current is uniformly distributed over a wide range of the adsorption means 18, the amount of active species such as OH radicals generated increases.

  In this embodiment, the discharge electrode 17 is applied positively, but the voltage applied to the discharge electrode 17 may be positive or negative.

  In the present embodiment, the suction means 18 is provided on a part of the surface of the insulating substrate 16. However, the suction means 18 may be provided on the entire surface of the insulating substrate 16 or on the side surface. . Thereby, the water adsorb | sucked by the adsorption | suction means 18 can be decomposed | disassembled efficiently.

  The discharge electrode 17 is formed of a single material. Thereby, the durability of the discharge electrode 17 can be improved as compared with the case where a treatment such as plating is performed.

  The cross-sectional shape at the tip of the discharge electrode 17 and the shape of the hole 21 of the insulating substrate 16 are the same type. Specifically, the cross-sectional shape of the discharge electrode 17 and the shape of the hole 21 of the insulating substrate 16 are circular.

  That is, the distance between the periphery of the tip of the discharge electrode 17 and the inner surface of the hole 21 of the insulating substrate 16 is uniform. As a result, the current is dispersed over a wide range of the suction means 18, and the discharge portion of the discharge electrode 17 is similarly dispersed and discharged from the wide range of the discharge electrode 17, thereby suppressing deterioration in the discharge electrode 17. As a result, active species can be stably generated.

  In addition, the tip of the discharge electrode 17 is positioned closer to one side of the insulating substrate 16. As a result, the current is easily dispersed over a wide range of the entire adsorption means 18 provided on the inner surface of the insulating substrate 16 with respect to the hole, so that the amount of OH radicals generated is increased. In the example of FIG. 5, the tip of the discharge electrode 17 is disposed on the surface provided with the suction means 18.

  The distance between the tip of the discharge electrode 17 and the counter electrode 19 is longer than the distance between the tip of the discharge electrode 17 and the suction means 18. Specifically, the current flowing between the discharge electrode 17 and the counter electrode 19 flows, for example, from the discharge electrode 17 through the suction means 18 that covers the inner surface of the hole 21 of the insulating substrate 16, and then the current of the insulating substrate 16. On the other hand, it flows through the adsorption means 18 on the surface of the surface, and finally reaches the counter electrode 19, that is, the creeping distance is long. As a result, no spark discharge occurs, and safety can be improved.

  The counter electrode 19 is provided in contact with the other surface located on the back side of one surface of the insulating substrate 16, that is, the outer surface between the one surface and the other surface of the insulating substrate 16. It may be. As a result, when electrons flowing from the discharge electrode 17 flow along the surface of the insulating substrate 16, a so-called creepage distance, which is a distance traveled by the electrons, is increased, so that spark discharge is less likely to occur.

  However, the present invention is not limited to this, and when the counter electrode 19 is provided on the surface of the insulating substrate 16, it is necessary to arrange the counter electrode 19 in a state in which a sufficient creeping distance is secured.

  Next, a case where a negative voltage is applied to the discharge electrode 17 as shown in FIG. 10 will be described. When a discharge voltage is applied to the discharge electrode 17 by a power supply at about minus 3 to 10 KV, a strong electric field is formed on the surface of the discharge electrode 17. Since a negative high voltage is applied to the discharge electrode 17, free electrons are released into the air. The insulating substrate 16 in contact with the counter electrode 19 is on the plus side. As a result, a current flows from the counter electrode 19 to the discharge electrode 17 as the electrons move.

  The electrons released from the discharge electrode 17 in FIG. 10 to the air are attracted to the strong electric field of the counter electrode 19 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 molecular anions react with water molecules adsorbed on the surface of the insulating substrate to generate OH radicals.

  By performing the so-called negative corona discharge, which is a discharge from the discharge electrode 17 applied to the negative as described above, moisture around the adsorption means 18 reacts with electrons, thereby making it easier to generate OH radicals. It is.

  Further, as described above, electrons flow in the surface direction between the discharge electrode 17 and the counter electrode 19 via the adsorption means 18, so that the creeping distance becomes long and current flows through the surface of the insulating substrate 16. .

  As described above, the OH radicals (active species) generated as shown in FIGS. 9 and 10 are discharged into the room from the exhaust port 5 of the active species generator 3 by the air blown from the air blowing means 7 in FIG. 2 or FIG. . By supplying the air containing the OH radicals into the room 1, the bacteria in the air can be inactivated. Moreover, the deodorizing effect can be exhibited by decomposing and removing the odor in the air.

  As described above, the present invention includes a main body case, a flat plate-shaped insulating substrate provided in the main body case, a rod-shaped discharge electrode disposed to face one surface of the insulating substrate, A counter electrode in contact with the insulating substrate and a power source for applying a voltage to the discharge electrode and the counter electrode are provided. The insulating substrate has a hole, and an inner surface of the hole and one of the insulating substrates An adsorption means for adsorbing moisture is provided on the surface of the surface, and the tip of the discharge electrode is positioned approximately in the center of the hole, so that active species are stably generated. Can do.

  That is, in the present invention, the inner surface of the hole portion of the insulating substrate and the one surface surface of the insulating substrate are provided with adsorption means, and the tip of the discharge electrode is positioned approximately in the center of the hole portion. When a high voltage is applied between the electrode and the counter electrode, the current flowing between the discharge electrode and the counter electrode flows through the adsorption means located around the discharge electrode provided on the insulating substrate from the discharge electrode, Will reach the electrode.

  In other words, since the suction means is located around the discharge electrode, the current is dispersed over a wide range of the suction means, and the discharge portion of the discharge electrode is similarly dispersed and discharged from the wide range of the discharge electrode. Deterioration at the discharge electrode can be suppressed, and as a result, active species can be stably generated.

  Therefore, utilization as an air cleaner is expected.

DESCRIPTION OF SYMBOLS 1 Room 2 On the floor 3 Active species generator 4 Intake port 5 Exhaust port 6 Main body case 7 Air blowing means 8 Active species generation means 9 Partition plate part 10 Air passage part 11 Space part 12 Electric motor 13 Blade part 14 Casing part 15 Inlet 16 Insulation Substrate 17 discharge electrode 18 adsorbing means 19 counter electrode 20 power source 21 hole 22 support member 23 adsorbent 24 adhesive 25 pore

Claims (6)

A body case,
A flat plate-shaped insulating substrate provided in the main body case;
A rod-shaped discharge electrode disposed to face one surface of the insulating substrate;
A counter electrode in contact with the insulating substrate;
A power source for applying a voltage to the discharge electrode and the counter electrode;
The insulating substrate has a hole;
Adsorbing means for adsorbing moisture on the inner surface of the hole and one surface of the insulating substrate;
The tip of the discharge electrode is
An active species generator configured to be positioned substantially in the center of the hole. The active species generator according to claim 1, wherein the discharge electrode is formed of a single material. A cross-sectional shape of the tip of the discharge electrode;
The shape of the hole of the insulating substrate is
The active species generator according to claim 1 or 2, which has the same shape. A cross-sectional shape of the discharge electrode;
The shape of the hole of the insulating substrate is
The active species generator according to claim 3, which has a circular shape. The tip of the discharge electrode is
The active species generator according to any one of claims 1 to 4, wherein the active species generator is configured to be positioned closer to one surface of the insulating substrate. The distance between the tip of the discharge electrode and the counter electrode is
6. The active species generator according to claim 5, wherein the active species generator is longer than the distance between the tip of the discharge electrode and the adsorption means.

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