JP2005177706A - Air cleaning and activating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air cleaning and activating device emitting directly below a large amount of negative ions and a small amount of ozone without installing any air supply means. <P>SOLUTION: The air cleaning and activating device for emitting negative ions is constituted by combining oppositely placed discharge electrodes oppositely placing a positive cylindrical electrode and a negative needle-type electrode; and is mounted on a ceiling with emitting holes facing directly below. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for purifying and activating indoor air by generating negative ions and a small amount of ozone and releasing them outside the apparatus.

  As a method for generating negative ions electrically, a corona discharge method or a single needle method is employed. The corona discharge method can be broadly divided into needle shape and ionization line, but the applicant has already filed a corona discharge method that combines a negative needle electrode and a positive cylindrical electrode as a counter electrode. (Patent Document 1) Japanese Patent No. 3017146) By forming the counter electrode into a cylindrical shape as seen in the products being implemented, it has a clear electronic wind and has a dust collection capability, so it is fanless. It is also used as a type of air purifier.

The single-needle method is often used in products that are sold at a relatively low price range as a product that is in line with the trend of the negative ion boom in recent years. Negative ions are generated by applying a voltage, and there is almost no electron wind. This is a mechanism for releasing electrons into the air by the force of voltage. There exists patent document 2 (Unexamined-Japanese-Patent No. 2001-321661) as an example of a single needle system. It is sold with a fan installed or its generating unit built into an air conditioner or fan.
Japanese Patent No. 3017146 JP 2001-321661 A

These air purifiers with the release of negative ions were of the floor type or the type installed at a high place such as on a shelf.
An object of the present invention is to provide an air cleaning activator that discharges negative ions and / or a small amount of ozone directly below without providing a blowing means such as a fan.

A cylindrical electrode and a needle electrode are arranged opposite to each other to form a counter discharge electrode. By applying a high DC voltage using the needle electrode as a negative electrode and the cylindrical electrode as a positive electrode, wind containing negative ions is generated. An air freshener activator that discharges,
An air cleaning activator characterized by discharging downward air containing negative ions.
(1) A counter discharge electrode is configured by arranging a cylindrical electrode and a needle electrode facing each other. By applying a high DC voltage with the needle electrode as a negative electrode and the cylindrical electrode as a positive electrode, negative ions are generated. An air cleaning activator that emits wind containing
The case of the air cleaning activator is formed of a casing having an opening on the lower surface and a front mounting plate that is detachably mounted on the opening surface of the casing and has a hole for releasing negative ions.
A cylindrical electrode is mounted in a hole provided in the front mounting plate, and the front mounting plate is detachable from the housing in a state where at least the cylindrical electrode is mounted.
An air cleaning activator characterized by discharging downward air containing negative ions.
(2) The housing is provided with an attachment piece that extends outward at the opening side end and has a small hole,
A range corresponding to the hole provided in the front plate body is an annular open portion, and the open portion includes an exterior annular body including a surface corresponding to the mounting piece slightly smaller than the housing opening,
On the surface corresponding to the mounting piece of the outer annular plate body, a small hole is provided at a position corresponding to the small hole provided in the mounting piece,
The air purifying activity according to (1), comprising a binding device that binds both small holes, wherein the casing and the outer annular body are connected by a binding device with an external mounting member such as a ceiling plate interposed therebetween. vessel.
(3) The front plate is attached to the housing via an outer ring body. (1) The air cleaning activator according to (2), (4) a hanging mold provided with a hanging tool on the back surface, The air cleaning activator according to (1), wherein
(5) The air cleaning activator according to any one of (1) to (4), wherein a plurality of counter discharge electrodes are provided.
(6) The needle-like electrode is located on the axial extension of the cylinder of the cylindrical electrode, and is arranged 1 to 5 mm away from the opening surface, preferably 2 to 3 mm apart (1) to ( 5) The air cleaning activator described in any one of.
(7) The air cleaning activator according to any one of (1) to (6), wherein a single needle discharge electrode as a negative electrode is combined.
(8) Any one of (1) to (7), wherein negative ions are released from the single needle electrode, and negative ions and a small amount of ozone are released from the counter electrode by corona discharge. The air purifier activator described.
(9) The needle-like electrode and / or single needle-like electrode is made of titanium or a titanium-based material, and the cylindrical electrode is made of an electrode material containing a photocatalyst such as titanium oxide (1) to The air cleaning activator described in any one of (8).
(10) The air cleaning activator according to any one of (1) to (9), wherein ultraviolet rays are emitted from the needle-shaped electrode together with electric discharge.
(11) From an air purification activator body and an outer annular plate body, each of which includes a housing having one surface opened and an installation plate provided with an installation hole for mounting a counter discharge electrode and / or a single needle-like discharge electrode on the release surface. An air purifying activator, provided with a mounting piece having a screw hole on the outer side of the release surface of the housing, and forming a hole in the outer annular plate body that opposes the screw hole made in the mounting piece, (1) to (10) characterized in that a bolt is provided for screwing the screw hole of the mounting piece and the hole of the outer ring plate with the ceiling structure sandwiched between the casing and the outer annular plate. An air cleaning activator described in any of the above.

(1) Without requiring a blowing means such as a fan previously proposed by the present inventor, the air purifying activator is installed above the ceiling or the like, and the outlet is installed directly below, so that it is constant from directly below. In the space in the range, it was possible to realize a state in which the density is attenuated and distributed at a substantially constant density by radiation of negative ions and a small amount of ozone.
(2) With one counter discharge electrode, the measured value of negative ions at a position 2.5 m away from the emission port is 20% or less for horizontal emission, but about 65% for direct emission. Can be maintained.
(3) In the air cleaning activator provided with four counter discharge electrodes, the attenuation rate can be suppressed as compared with the case of one.
(4) Since it is a ceiling-mounted type or a suspended type, this device can be installed at regular intervals, and the distribution of negative ions and the like can be made uniform from a narrow room to a wide room.
(5) Alternatively, the present apparatus can be installed directly above the place where negative ions are required, so that an effective arrangement can be achieved. For example, it can be provided directly above the smoking area.
(6) The amount of negative ions generated can be increased by combining a single needle-like discharge electrode and a counter discharge electrode.
(7) By detaching only the installation plate on which the discharge electrode is installed, it is possible to easily maintain dust and the like attached to the cylindrical electrode.
(8) This device can synergistically exhibit effects such as sterilization, sterilization, deodorization, and smoke removal by using negative ions and a small amount of ozone in combination.
(9) Since this apparatus does not require a blowing means such as a fan, it is quiet and power saving.
(10) This device generates weak ultraviolet light, and the decomposition of odor molecules, smoke particles, dust particles, etc. is promoted by the photocatalytic action of titanium oxide on the cylindrical electrode.
(11) As air flows through the cylindrical electrode, dust having a negative charge is adsorbed and collected by the cylindrical electrode.
(12) The air purifying activator of the present invention is not particularly limited in its use, but it is generally used in indoors, hospitals, cars, trains, commercial facilities, entertainment facilities, restaurants, restaurants, beauty / barbers, smoking Examples include various facilities and individual places such as places, fresh food departments, food departments, factories, pet shops, animal hospitals, ceilings, and warehouses.

<Ceiling installation type, hanging type (downlight method)>
In the present invention, the air containing negative ions and a small amount of ozone is blown out directly from the generator, so that the attenuation of the amount of negative ions and ozone in a certain range of space directly below is much smaller than that of blowing out horizontally. The air purification activator with the discharge hole directed directly below was created.
Further, the present invention provides a plurality of installed air purification activators by finding that the attenuation rate can be further reduced by providing more than one generator of negative ions and trace amounts of ozone.
Furthermore, focusing on the fact that it is possible to further increase the amount of negative ions released by using a single needle-shaped discharge electrode in combination, an air cleaning activator combining a single needle-shaped discharge electrode is provided. is there.
Specifically, the air purifying activator is configured to be attached to the ceiling with the discharge hole directed downward, or is configured to be suspended from the ceiling or the like.

<1-1 Container>
The air cleaning activator is composed of a discharge electrode that generates negative ions and the like, a high-voltage power supply unit for generating high voltage, a power supply cable that connects the two, and a container that accommodates these devices. Is provided with a configuration to be attached to the ceiling or the like.
Since the cylindrical electrode of the counter electrode employed in the present invention needs to perform cleaning maintenance accompanying dust collection, it needs to be configured to ensure the ease of this maintenance.
The housing of these components is prepared by preparing a housing having an opening on the lower surface when attached to a ceiling or the like, and the housing includes at least a high-voltage power supply unit and a power cable from the high-voltage power supply to the discharge electrode. And provide a connection to an external power source.
A front mounting plate is detachably provided on the opening surface of the casing. The front mounting plate is provided with a hole for mounting at least a cylindrical electrode that requires maintenance. The electrode is also configured to be removable. The needle electrode can be attached to the housing side or the front mounting plate side as long as the needle electrode and the cylindrical electrode can be kept in a predetermined arrangement.
However, when a ceiling plate or the like is interposed between the housing opening and the front mounting plate, it is difficult to keep the arrangement relationship between the cylindrical electrode and the needle electrode in a predetermined positional relationship. It is suitable to attach a cylindrical electrode and a needle-like electrode to exhibit predetermined performance.
The front mounting plate is also provided with a hole corresponding to a single needle-like discharge electrode.
In the case where a plurality of counter discharge electrodes are used, it is useful to keep them in a predetermined relationship if they are integrated into a cartridge, which is attached to the front plate and is attached and detached for maintenance and the positional relationship.
When the casing and the front mounting plate are made of metal, the shielding property against radio noise is enhanced.
The external shape can be designed according to the installation location, and can be devised such as a rectangular or round exterior surface, a cylindrical or rectangular tube housing, and the like.

<Fixing means for air cleaning activator>
The air purifying activator is assumed to be a case that is directly attached to a ceiling structure material such as a ceiling plate or a beam, a case that is embedded in a ceiling, a case that is attached to a space such as an atrium, and the like.
In the case of direct attachment to the ceiling structure material, it can be attached via a connector such as an attachment piece provided directly on the back surface or side edge of the housing, or by attaching a fluorescent lamp or the like to the ceiling structure material.
When embedding in the ceiling, provide a notch for insertion in the ceiling, place an air purifier or housing on the back of the ceiling plate, place an exterior annular plate covering the notch on the ceiling surface side, and place the ceiling plate in between It is possible to adopt a configuration in which the outer annular body and the casing are connected and fixed firmly by being sandwiched. In addition, if the front plate is attached after the outer annular body is attached, the attachment and detachment at the time of maintenance and the like becomes extremely easy.
As a means for suspending from the ceiling, a hook, a string, a chain, or the like can be employed on the back surface of the casing.

<2 Discharge method>
<2-1 Counter discharge electrode>
The main means for generating negative ions employed in the present invention is the cylindrical electrode previously proposed by the present applicant as the positive electrode, and the negative electrode needle slightly outside the opening surface on the extension line of the central axis of the cylindrical electrode cylinder. This is a means for generating negative ions by silent discharge by corona discharge using a counter discharge electrode on which the electrode is disposed. According to this method, negative ions and a small amount of ozone are released from the cylindrical electrode at a wind speed of about 3 m / s without providing a blowing means such as a fan. Furthermore, weak ultraviolet rays are generated with the discharge from the needle electrodes. About 500,000 negative ions have been observed. This method does not require a driving source such as a motor, is quiet and labor-saving, and exhibits the effect of combined use of negative ions and ozone.
By using a photocatalyst such as titanium oxide for the cylindrical electrode, the photocatalyst is activated by ultraviolet rays, and smoke removal, deodorization, decomposition of floating dust, and the like can be promoted. By using a titanium oxide alloy as the electrode material, both improvement in durability due to discharge and elimination of adsorbed dust can be solved, and the performance of the counter discharge electrode can be sufficiently exhibited.
The arrangement relationship between the needle electrode and the cylindrical electrode constituting the counter discharge electrode has a great influence on the above-described wind force generation, the amount of negative ions generated, and the amount of ozone. The needle-like electrode is an extension of the axis of the cylindrical electrode, and needs to be arranged with a gap several millimeters outside the opening surface. As a result of investigating changes in the generated wind speed, ozone amount, and negative ion amount for the pair of counter discharge electrodes on the horizontal axis, the distance between the needle electrode and the cylindrical electrode is plotted on the horizontal axis. Decreased, the amount of negative ions increased, and it was confirmed that the wind speed draws a parabola with a peak near 3 mm. Therefore, in order to release negative ions far away, the interval is required to be 1 to 5 mm, and preferably 2 to 4 mm. Separately, as a result of experiments on the diameter of the cylindrical electrode, it has been found that 10 to 50 mm, particularly 20 mm, is suitable.

<2-2 Combination with single needle electrode>
Furthermore, a single needle-shaped negative electrode without a cylindrical electrode generates more negative ions than a counter electrode from a single needle-shaped electrode, but since there is no blowing power, there is no discharge by itself. By disposing it close to the counter discharge electrode, it can be discharged on its blowing force. In this combined method, since more negative ions can be measured than the sum of the amounts measured independently, it is presumed that a synergistic effect is exhibited.
The single needle discharge electrode has no directivity in the negative ion emission direction. Therefore, in order to concentrate on the emission hole side, if a reflector is provided on the back surface of the single needle discharge electrode, the efficiency increases.
The single needle-like electrode is made of the same material as the counter discharge electrode, and is formed larger than the needle electrode used for the counter discharge electrode. Both thickness and length are about 1 to 3 times. When a negative voltage is applied to a single needle-like electrode used alone in a dark box, a short beam-like discharge can be observed, and a short beam-like air discharge is generated. It is considered that negative ions are generated by this discharge. By providing a concave reflecting plate on the back side of the single needle-like electrode, an increase of inus ions was observed in front of the apparatus, and it was understood that the reflecting plate has an effect of enhancing directivity.

<2-3 Cartridge>
Since the negatively charged dust adheres to the cylindrical electrode as the positive electrode, cleaning maintenance is required. The positional relationship between the needle electrode and the cylindrical electrode needs to be accurately maintained in order to realize a predetermined discharge. In order to prevent this positional relationship from being changed even by detachment due to maintenance, etc., a plurality of cylindrical electrodes are put together into a cartridge and positioned and fixed in the hole of the front mounting plate that needs to be opened or closed, or the front mounting plate By repositioning and fixing to the mounting hole, it can be accurately remounted. This configuration is useful for maintaining the negative ion generation performance.

<Operation of 2-4 direct release method>
Conventionally, the negative ion generator is mainly diffused with the discharge direction horizontal on a floor or a shelf. In the horizontal discharge method, as the distance from the vicinity of the discharge port increases, the negative ion density decreases rapidly, and it is difficult to keep the entire room at a uniform density. Since ozone larger than the average molecular weight is included, it was difficult to blow in a mixed state of negative ions and ozone, and as a result of trial and error, it was emitted downward from the ceiling and attenuated from the horizontal direction. Since the negative ions could be distributed with the rate kept, the present invention was devised.
Specifically, as a result of measuring negative ions at a position 2.5 m away from the discharge hole, which corresponds to the height of the ceiling, a measured value of 500,000 / cc is near the discharge hole, and 65% ( 325,000 / cc, 35% attenuation rate), while horizontal blowout results in 20% or less (100,000 pieces or less, attenuation rate 80% or more). It was confirmed by actual measurement that the attenuation rate was smaller.
Furthermore, when a plurality of counter discharge electrodes are arranged, the attenuation rate can be further reduced. In the example using four, the attenuation factor could be suppressed to 20 to 26% in a range of 3 m in diameter immediately below 2.5 m.
Therefore, in a space such as a Japanese-style room, if an air cleaning activator incorporating four counter discharge electrodes is attached to the ceiling, the entire room can be uniformly covered. In addition, even in a large space such as an office room or a conference room, the entire space can be uniformly covered by attaching the ceiling to the ceiling with a certain interval. Of course, it can be concentrated in a smoking area to enhance the effect locally. In particular, for a rising object such as cigarette smoke, the ceiling installation is more effective.

<Action>
The device of the present invention does not require the use of a blower such as a fan for the generated negative ions and a small amount of ozone, and it becomes possible to distribute negative ions and the like in a certain range with a small attenuation rate by blowing out in the downward direction. Therefore, it is possible to realize an accurate action on the target space in an average or concentrated manner.
With this device, (1) sterilization, (2) deodorization, (3) reduction of suspended dust due to neutralization and subsidence of unloading suspended dust, (4) smoke extinguishing, and (5) dust collection by the cylindrical electrode Dust, (6) decomposition of adsorbed dust by photocatalytic action of titanium oxide contained in the cylindrical electrode, (7) creation of a refreshing environment by negative ions (forest bath effect), (8) no electromagnetic interference, etc. The effect is more than that of the negative ion generator.
In particular, a large amount of negative ions and a small amount of ozone are generated from this device, and it is emitted from the cylindrical electrode by a wind without using a blower such as a fan. Since there is little adverse effect on the operation of computer control equipment and part of the dust is adsorbed and the floating dust is reduced by the cylindrical electrode, there are few restrictions on the place to use, so the ceiling is Even if it is embedded, it is unlikely to limit the use.

<Bactericidal action>
It is powerfully sterilized by the synergistic effect of negative ions and trace amounts of ozone, and is effective for O-157, which causes food poisoning. Bactericidal performance could be confirmed in the test results of the growth test of E. coli and green mold.

<Deodorizing action>
Offensive odors and cigarette odors are fine particles that float in the air and adhere everywhere. Trace amounts of ozone and negative ions can quickly decompose odorous components and remove odors. A typical toilet deodorization test was performed using an air purifier activator. Ammonia and formaldehyde are halved in 20 minutes, formaldehyde is eliminated in 60 minutes, and ammonia is reduced to almost 20%, confirming that it is effective for deodorization. Good results were also observed in deodorization tests in animal rooms such as monkeys, dogs and ferrets.

<Dust collection and smoke suppression>
Dust and smoke can be collected and exhausted to 0.001 micron in a powerful manner up to 0.001 micron.
In the airborne dust reduction test, the filter method takes half an hour in 10 minutes, whereas the filter method requires 30 minutes. After 30 minutes, the filter method decreases by 70%, whereas in the filter method, 60 minutes have passed. However, the reduction of 70% has not been achieved. In this equipment, as a result of testing using dust that has no electric charge, when negative ions are contacted, negative ions are charged to the dust, adsorbed on the positive side, airborne dust is reduced, and air is It has been observed that a large amount of dust adheres to the outside of the cylindrical electrode and the lower part of the room such as the floor.

<Hygiene and cooling effect>
With low ozone concentration, hygiene management and photocatalytic reactions can be expected to provide health management and forest bathing effects due to a large amount of negative ions, and the enjoyment of fresh and healthy life will be enhanced. Safe living environment can be provided by sterilization + deodorization + dust collection + smoke removal. As a result of making an air purification activator incorporating four counter discharge electrodes in the ward and conducting a test to confirm its usefulness, the number of observed bacteria dropped before and after installation decreased from 18% to 58%, averaging 38%. Have confirmed its usefulness. The air purifying activator of the present invention can be expected to be more effective because the amount and range of negative ions released are expanded. Keeping the room air as normal as possible is one of the important infection prevention measures.

In summary, (1) sterilization, (2) deodorization, (3) reduction of suspended dust due to neutralization and subsidence of unloading suspended dust, (4) smoke extinguishing, (5) dust collection on the cylindrical electrode , (6) decomposition of adsorbed dust by photocatalytic action of titanium oxide contained in the cylindrical electrode, (7) creation of a cool environment by negative ions (forest bath effect), (8) no electromagnetic interference, (9) fan Since it is not used, effects such as low cost, small size and light weight can be achieved evenly by releasing directly from the ceiling.
The use of the air purifying activator of the present invention is not particularly limited, but it can be used in general rooms, hospitals, cars, trains, commercial facilities, entertainment facilities, restaurants, restaurants, beauty / barber institutes, smoking areas, fresh food Examples include various facilities and individual places such as sales floors, food sales floors, factories, pet shops, animal hospitals, ceilings, and warehouses.

This embodiment is an example of a ceiling-embedded type.
FIG. 1 is an exploded view of a container of an air cleaning activator. FIG. 2 is a diagram outlining the ceiling installation state. FIG. 3 is a perspective view of the air cleaning activator. FIG. 4 is a perspective view of the ceiling with the ceiling embedded. FIG. 5 is a schematic diagram of an apparatus arrangement of an example in which a counter electrode and a single needle electrode are used in combination. FIG. 6 is a negative ion observation diagram of an air cleaning activator incorporating four counter discharge electrodes. FIG. 7 is an observation diagram of negative ions in the blowing direction directly below. FIG. 8 is a schematic diagram of negative ion observation in a comparative example of horizontal blowing. FIG. 9 is a diagram of an example in which a cylindrical casing is employed. FIG. 10 is a diagram illustrating an example in which a rectangular outer annular body is provided.

  FIG. 3 is an overall perspective view of the ceiling-embedded air cleaning activator A of the present embodiment. A case 1 incorporating a negative ion generating device is formed of a housing 11 having an opening on the lower surface and a front mounting plate 20 that is detachably mounted on the opening surface of the housing and provided with a hole 21 for discharging negative ions. A cylindrical electrode 101 is mounted in a hole provided in the front mounting plate 20, and the front mounting plate 20 is detachable from the housing in a state where at least the cylindrical electrode is mounted. In the present embodiment, since it is a type that is embedded in the ceiling, an annular outer ring body 30 is combined so as to overlap the outer periphery of the front mounting plate 20.

  FIG. 1 shows an exploded view of case 1 of the present embodiment. The casing 11 is shown as a legitimate box with its lower surface open. The shape of the housing need not be limited to a cube, and may be cylindrical as shown in FIG. It can be determined as appropriate in consideration of the internal equipment layout and ease of handling. The front mounting plate 20 is sized to cover the open surface of the housing and is provided with a negative ion emission hole 21. A cylindrical electrode 101 is mounted in the negative ion emission hole 21 so that the front mounting plate 20 can be removed together with the cylindrical electrode 101. The present embodiment is an example in which four cylindrical electrodes are provided. Further, in the present embodiment, which is a ceiling-embedded type, the housing 11 is placed on the back side of the ceiling, and the front mounting plate 20 is installed so that the discharge holes 21 are substantially the same as the ceiling surface. A covering outer annular body 30 is combined. The outer annular body 30 was cut out so as not to block the negative ion emission hole 21 and formed into an annular shape with a width covering the ceiling cutout. The outer shape of the outer annular body 30 is free such as a circle, a square, and an ellipse. In FIG. 10, the example provided with the square-shaped exterior annular body was shown.

In the ceiling-embedded type of this embodiment, a method of connecting and fixing the casing 11 and the exterior annular body 30 with a ceiling plate interposed therebetween is adopted as a means for fixing to the ceiling. The configuration is such that a mounting piece 12 is provided on the outer side from the open end of the housing 11, small holes 13 and 31 are provided at positions corresponding to the mounting piece 12 and the exterior annular body 30, respectively. Insert and fix. In this example, a long bolt is adopted as a binding tool, and a means for fixing by screwing is formed by forming a female screw in the small hole 13 of the mounting piece 12. Thereafter, the front mounting plate 20 is detachably attached to the outer annular body 30 or the housing 11 by means such as screwing. This is because it is easier and more efficient to attach and remove the front mounting plate 20 at the time of maintenance and the like. Of course, it can also be set as the combination which installs the exterior annular body 30 after fixing the front mounting board 20.
FIG. 2 shows a schematic cross-sectional view of ceiling installation. 2A shows a state in which the casing 11, the outer annular body 30, and the front mounting plate 20 are arranged in this order from the top, and FIG. 2B shows a state in which the casing 11 is installed on the ceiling plate 200. The casing 11 is inserted into the ceiling from the notch provided on the ceiling board 200 and placed on the back surface of the ceiling board 200, and then the outer annular body 30 is aligned from the surface of the ceiling board 200, and the bolt 40 is inserted. Then, the front mounting plate 20 on which the cylindrical electrode 101 is mounted is attached. FIG. 4 shows a state diagram after the ceiling embedding construction. Since the only thing that can be seen is the decorative plate surface with four holes, the design of the ceiling is not impaired.

FIG. 5 is a diagram showing the configuration of the negative ion generator.
A counter electrode 100 for corona silent discharge, a single needle-like discharge electrode 120, and a high-voltage power supply unit 103 for generating a high voltage are housed in a case 1. The counter electrode 100 includes a negative needle electrode 102 and a positive cylindrical electrode 101 provided to face the needle electrode. The high voltage power supply unit 103 is a direct current power source, and applies a negative voltage to the needle electrode 102 and the single needle discharge electrode 120 via the cable 106, and the positive voltage to the cylindrical positive electrode via the cable 105. Apply. Silent corona discharge is generated from the needle electrode 102 toward the periphery of the opening of the cylindrical electrode 101, and short beam discharge is generated from the needle electrode 120. From the counter electrode 100, the present inventor has nucleated that air containing negative ions and a small amount of ozone is emitted at a wind speed of about 3 m / sec.
The positive electrode and the negative electrode use a titanium oxide alloy formed by mixing titanium oxide with titanium and improve durability against discharge. The diameter of the cylindrical positive electrode 101 is set to 19 mm, and the distance d between the needle-shaped negative electrode 102 and the cylindrical electrode 101 is set to 3 mm. The needle electrode 102 has a base diameter of 1.0 mm and a length of 13 to 14 mm. The single needle electrode 120 has a base diameter of 1.5 mm and a length of 25 mm, and has a single needle shape that is thicker and longer than an electrode for silent discharge. ing. An aluminum reflector 121 is provided on the rear side of the single needle-shaped discharge electrode 120, and a safety slit is provided on the front surface. It has been confirmed by a dark box experiment that a short beam-like discharge is generated from the single needle-shaped discharge electrode 120, but the amount of negative ions is also confirmed to attenuate with increasing distance, and the directivity is weak. The inventor has confirmed. In the example of FIG. 5, a single needle-shaped discharge electrode and a counter electrode are arranged in close proximity and used together, and a concave reflector is provided on the back of the single needle-shaped discharge electrode to move the negative ions forward. It is intended to increase the degree of concentration. In the measurement of the tip of the needle 30 cm, there was an increase of 1.6 to 2.0 times. The experimental results are shown in Table 1a. The negative voltage applied was minus 7.5 kv at a frequency of 4 kc.
Although the example of FIG. 5 shows an example in which the counter electrode 100 and the single needle-shaped discharge electrode 120 are combined, one or a plurality of counter electrodes may be combined. In the example shown in FIGS. 1, 3, and 4, four counter electrodes 100 are incorporated.

6 to 8 are diagrams showing tests of the present invention.
<Ceiling installation test>
FIG. 6 shows a situation in which the air cleaning activator shown in FIG. 3 is embedded in a ceiling of 2.5 m. Near the discharge hole, negative ions of 500,000 / electrode are measured at a wind speed of about 3 m / sec, and 370,000 to 400,000 negative electrodes / electrode are in the range of 3 m in diameter on the floor. It was measured. The attenuation rate is 20 to 26%. The rate of loss was defined as the attenuation rate. In this case, for example, 100% −370,000 / 500,000 × 100% = 26%.

<Comparison test>
FIG. 7 is a measurement graph of the number of negative ions according to the distance from the discharge hole of the air cleaning activator, and this book is released from 3.5 m higher than the normal ceiling height, using one counter electrode. An example of the invention, Comparative Example 1 in which the product is discharged horizontally from a height of 1.4 m as shown in FIG. 8, and Comparative Example 2 in which products of other companies are discharged in the same manner as Comparative Example 1.
In this embodiment, there are 500,000 near the discharge holes. It is 1.2m to cut 400,000 pieces, 320,000 pieces (attenuation rate 36%) at 2.5m near the normal ceiling height, and 300,000 pieces (attenuation rate 40) near the floor of 3.0m to 3.5m. %).
On the other hand, in Comparative Example 1, the number is 400,000 at 0.5 m, halved to a little less than 250,000 at 1.0 m, less than 100,000 at 2.5 m, and gradually decreasing thereafter.
In Comparative Example 2, the number was about 200,000 near the discharge hole, and decreased in an inverse proportion to 2.0 m, so that it was almost impossible to measure.
From this test, it can be seen that the emission rate is lower and the decay rate is smaller, making it easier to create a negative ion environment uniformly.
The embodiment of FIG. 7 and the embodiment of FIG. 6 are compared. The former was attenuated by 36% immediately below 2.5 m, but the example of the plurality of electrodes in FIG. This indicates that the attenuation rate can be reduced by combining a plurality of counter electrodes.

Exploded schematic diagram of container of air cleaning activator A diagram outlining the installation in the ceiling Perspective view of air purifier activator Ceiling perspective view with ceiling mounted Example of equipment layout using both counter electrode and single needle electrode Negative ion observation diagram of an air cleaning activator incorporating four counter discharge electrodes Observation diagram of negative ions by blowing direction Schematic diagram of negative ion observation of comparative example of horizontal balloon Example of cylindrical housing Example of a rectangular outer ring

Explanation of symbols

A Air purifying activator d Interval 1 Case 11 Case 12 Mounting piece 13, 31 Small hole 20 Front mounting plate 21 Release hole 30 Exterior annular body 40 Bolt 100 Counter electrode 101 Cylindrical electrode 102 Needle electrode 103 High voltage power supply unit 105 Cable 106 Cable 120 Single needle-shaped discharge electrode 121 Reflecting plate 200 Ceiling plate

Claims (1)

A cylindrical electrode and a needle electrode are arranged opposite to each other to form a counter discharge electrode. By applying a high DC voltage using the needle electrode as a negative electrode and the cylindrical electrode as a positive electrode, wind containing negative ions is generated. An air freshener activator that discharges,
An air cleaning activator characterized by discharging downward air containing negative ions.