JP3102434U - Air purifier for ceiling installation - Google Patents

Abstract

An air purifying activator that emits a large amount of negative ions and a small amount of ozone immediately below without providing a blowing unit.
An air purifying activator that emits negative ions by combining an opposite discharge electrode in which a positive cylindrical electrode and a negative needle electrode are arranged opposite to each other, such as to a ceiling or the like with an emission hole directed downward. The air purifying activator to be installed.
[Selection diagram] FIG.

Description

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

  As a method of electrically generating negative ions, a corona discharge method or a single-needle method has been adopted. In the corona discharge method, the shape of the electrode can be roughly classified into a needle shape and an ionization line.In particular, the applicant has already filed a corona discharge method combining a negative needle electrode and a positive cylindrical electrode as a counter electrode. ((Patent Literature 1) Japanese Patent No. 3017146), by forming the counter electrode in a cylindrical shape as seen in the products being implemented, a clear electronic wind is generated, and since there is a dust collecting ability, a fanless system is provided. It is also used as a type of air purifier.

The single-needle method is often sold at a relatively inexpensive price as a product that takes advantage of the recent trend of the negative ion boom, but it does not have a positive counter electrode and has a high needle negative electrode. This is a mechanism that generates negative ions by applying a voltage, and emits electrons into the air by the force of the voltage with almost no electron wind. Patent Document 2 (Japanese Patent Laid-Open No. 2001-321661) discloses an example of the single-needle system. It is sold with a fan installed or its generation unit incorporated in an air conditioner or fan.
Patent No. 3017146 JP 2001-321661 A

The air purifiers that emit these negative ions are of a floor-standing type or a type that is installed at a high place such as on a shelf.
It is an object of the present invention to provide an air purifying activator that emits negative ions and / or a small amount of ozone directly below without particularly providing a blowing means such as a fan.

(1) A cylindrical electrode and a needle electrode are opposed to each other to constitute an opposed discharge electrode, and the needle electrode is used as a negative electrode, and the cylindrical electrode is used as a positive electrode. An air purifying activator that emits a wind containing
The case of the air purifying activator is formed of a housing having an opening at a lower surface and a front mounting plate detachably mounted on the opening surface of the housing and having a hole for emitting negative ions,
A cylindrical electrode is mounted in the hole provided in the front mounting plate, and the front mounting plate is detachably attached to the housing in a state where at least the cylindrical electrode is mounted,
An air purifying activator characterized by discharging wind containing negative ions downward.
(2) The housing is provided with a mounting piece that extends outward and is provided with a small hole at the opening side end,
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 slightly smaller than the housing opening and corresponding to the mounting piece,
On the surface corresponding to the mounting piece of the exterior annular plate, 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), further comprising a binding device for binding the two small holes, wherein the casing and the outer annular body are connected by the binding device with an external mounting member such as a ceiling plate interposed therebetween. vessel.
(3) The air purifying activator according to (1) or (2), wherein the front plate is attached to the housing via an outer annular body. The air purifying activator according to (1), wherein:
(5) The air purifying activator according to any one of (1) to (4), wherein a plurality of opposed discharge electrodes are provided.
(6) The needle-shaped electrode is located on an extension of the axis of the tube of the cylindrical electrode, and is arranged at a distance of 1 to 5 mm, preferably 2 to 3 mm from the opening surface. An air purifying activator according to any of (5).
(7) The air purifying activator according to any one of (1) to (6), wherein a single-needle discharge electrode serving as a negative electrode is combined.
(8) The method according to 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 opposite electrode by corona discharge. The described air purifying activator.
(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. An air purifying activator according to any of (8).
(10) The air purifying activator according to any one of (1) to (9), wherein the needle electrode emits ultraviolet light together with electric discharge.
(11) An air-cleaning activator main body comprising an enclosure having one open surface, an installation plate provided with installation holes for mounting opposed discharge electrodes and / or single-needle discharge electrodes on the open surface, and an outer annular plate body. An air purifying activator, wherein a mounting piece having a screw hole is provided on the outer side of the open surface of the housing, and the outer annular plate body is formed with a hole opposing the screw hole formed in the mounting piece, A bolt for screwing a screw hole of a mounting piece and a hole of an outer ring plate with a ceiling structure sandwiched between a housing and an outer ring plate body is provided (1) to (10). An air purifying activator according to any one of the above.

(1) The air purifying activator is installed above the ceiling or the like and the outlet is directed downward, thereby eliminating the necessity of the blowing means such as a fan previously proposed by the present inventor. In the space in the range of, due to the emission of negative ions and a small amount of ozone, it was possible to realize a state in which the density is distributed at a substantially constant density with a small attenuation state.
(2) With one opposed discharge electrode, the measured value of negative ions at a position 2.5 m away from the emission port is less than 20% for horizontal emission, but about 65% for direct emission below, and has a high density. Can be maintained.
(3) In the air purifying activator provided with four opposed 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, the device can be installed at regular intervals, and the distribution of negative ions and the like can be made uniform from a small room to a wide room.
(5) Alternatively, the device can be installed immediately above a place where negative ions are required, so that an effective arrangement can be achieved. For example, it can be provided immediately above a smoking place.
(6) By combining a single-needle discharge electrode and a counter discharge electrode, the amount of negative ions generated can be increased.
(7) By attaching and detaching only the installation plate on which the discharge electrode is installed, it is possible to easily maintain dust and the like adhering to the cylindrical electrode.
(8) By using a combination of negative ions and a small amount of ozone, the present device can synergistically exert effects such as sterilization, sterilization, deodorization, and smoke removal.
(9) Since this device does not require a fan or other blowing means, it is quiet and consumes less power.
(10) The device generates weak ultraviolet rays, and the decomposition of odor molecules, smoke particles, dust particles, and the like 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 on the cylindrical electrode and collected.
(12) The air purifying activator of the present invention is not particularly limited in its use, but may be used in general rooms, hospitals, cars, trains, commercial facilities, recreational facilities, restaurants, restaurants, beauty and barber shops, smoking. Examples include various facilities and places such as a place, a fresh section, a food section, a factory, a pet shop, an animal hospital, a ceiling, a warehouse, and the like.

<Ceiling installation type, hanging type (downlight type)>
According to the present invention, by blowing air containing negative ions and a small amount of ozone from the generator directly downward, the attenuation of the amount of negative ions and ozone in a certain range of space immediately below is significantly smaller than that of blowing horizontally. To produce an air purifying activator with the discharge hole directed downward.
Further, the present inventors have found that the provision of a plurality of generators of negative ions and a small amount of ozone, rather than one, can further reduce the attenuation rate, and provide an air cleaning activator having a plurality of generators.
Further, by focusing on the fact that the discharge amount of negative ions can be further increased by using a single needle-shaped discharge electrode in combination, an air purifying activator combining a single needle-shaped discharge electrode is provided. is there.
Specifically, the air purifying activator is mounted on the ceiling with the discharge hole directed downward, or is suspended from the ceiling or the like.

<1-1 container>
The air purifying activator is composed of equipment consisting of a discharge electrode for generating negative ions and the like, a high-voltage power supply unit for generating high voltage, and a power cable connecting the two, and a housing for housing these equipment. Is provided with a structure to be mounted on a ceiling or the like.
It is necessary to perform cleaning maintenance associated with dust collection for the cylindrical electrode of the opposed electrode employed in the present invention, and it is necessary to adopt a configuration that ensures the ease of maintenance.
For housing these components, a housing having an opening surface on the lower side in a state of being attached to a ceiling or the like is prepared, and the housing has at least a high-voltage power supply unit and a power cable from the high-voltage power supply to a discharge electrode. And a connection to an external power supply.
A front mounting plate is detachably provided on the opening surface of the housing, and the front mounting plate is provided with a hole for mounting at least a cylindrical electrode requiring maintenance. It is configured so that the shape electrode can also be removed. The needle electrode can be freely attached to the housing or the front mounting plate as long as the needle electrode and the cylindrical electrode can be maintained in a predetermined arrangement.
However, if a ceiling plate or the like is interposed between the housing opening and the front mounting plate, it is difficult to maintain the positional relationship between the cylindrical electrodes and the needle electrodes in a predetermined positional relationship. It is more appropriate to attach a cylindrical electrode and a needle-shaped electrode to the device to exhibit predetermined performance.
The front mounting plate is also provided with a hole corresponding to a single needle-shaped discharge electrode.
In the case where a plurality of opposed discharge electrodes are used, it is useful to keep them in a predetermined relationship by attaching and detaching them to the front plate and attaching / detaching for maintenance, and a positional relationship.
If the housing and the front mounting plate are made of metal, the shielding of radio wave noise is enhanced.
The external shape can be designed according to the installation location and the like, and a square or round exterior surface, a cylindrical or rectangular cylindrical housing, or the like can be devised.

<Fixing means for air purifying activator>
The air purifying activator may be a case directly attached to a ceiling structural material such as a ceiling plate or a beam, a case embedded in a ceiling, or a case attached to a space such as a stairwell.
In the case of directly attaching to the ceiling structural member, a mounting piece may be provided on the back or side end of the housing and directly fixed, or may be attached via a connector such as a fluorescent lamp or the like attached to the ceiling structural member.
When embedding in the ceiling, provide a notch for insertion in the ceiling, place an air purifying activator or housing on the back of the ceiling plate, apply an exterior annular plate covering the notch to the ceiling surface side, and place the ceiling plate between It is possible to adopt a configuration in which the outer annular body and the housing are connected to each other to be connected and firmly fixed. In addition, if the front plate is attached after the outer annular body is attached, attachment / detachment during maintenance or the like becomes extremely easy.
As means for hanging from the ceiling, a hook, a string, a chain, or the like can be adopted on the back of the housing.

<2 Discharge method>
<2-1 Opposite discharge electrode>
The main means for generating negative ions employed in the present invention is that the cylindrical electrode proposed earlier by the present applicant is a positive electrode, and the negative electrode needle is slightly outside the opening surface on the extension of the central axis of the cylindrical electrode tube. This is means for generating negative ions by silent discharge by corona discharge using an opposed discharge electrode on which a shape electrode is arranged. According to this method, negative ions and a small amount of ozone are emitted from the cylindrical electrode at a wind speed of about 3 m / sec without providing a blowing means such as a fan. Further, 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, is labor-saving, and exhibits the effect of the 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 it is possible to promote smoke removal, deodorization, decomposition of suspended dust, and the like. By using a titanium oxide alloy as an electrode material, both improvement of durability by discharge and elimination of adsorbed dust can be solved, and the performance of the opposed discharge electrode can be sufficiently exhibited.
The positional relationship between the needle electrode and the cylindrical electrode that constitute the opposed discharge electrode has a great influence on the above-mentioned generated wind, the amount of generated negative ions, and the amount of ozone. The needle-shaped electrodes are located on the axis of the cylindrical electrode, and need to be arranged at intervals several millimeters outside the opening surface. For a pair of opposed discharge electrodes, the horizontal axis is the distance between the needle electrode and the cylindrical electrode, and the changes in the resulting wind speed, ozone amount, and negative ion amount were examined. In this corona discharge method, the amount of ozone generated increased as the distance increased. Was decreased, the amount of negative ions was increased, and the wind speed was confirmed to draw a parabola with a peak around 3 mm. Therefore, in order to discharge the negative ions far, the interval is required to be about 1 to 5 mm, preferably 2 to 4 mm. Separately, as a result of an experiment on the diameter of the cylindrical electrode, it was found that 10 to 50 mm, particularly about 20 mm, was suitable.

<2-2 Combination with single needle electrode>
Furthermore, a single-needle-shaped negative electrode without a cylindrical electrode generates more negative ions from the single-needle-shaped electrode than the counter electrode. By arranging it in the vicinity of the opposed discharge electrode, it is possible to discharge it on the wind. In this combined method, since more negative ions can be measured than the sum of the amounts measured independently of each other, it is presumed that the synergistic effect is exhibited.
In the single needle-shaped discharge electrode, there is no directivity in the emission direction of the negative ions. Therefore, if a reflector is provided on the back surface of the single needle-shaped discharge electrode in order to concentrate on the emission hole side, the efficiency is improved.
The single needle-shaped needle electrode is made of the same material as the opposed discharge electrode, and is formed larger than the needle electrode used for the opposed discharge electrode. Both the thickness and the length are about 1 to 3 times. When a state in which a negative voltage is applied to a single-needle needle electrode used alone is observed 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 reflector on the back side of the single needle electrode, an increase in negative ions was observed in front of the device, and it was understood that the reflector had an effect of enhancing directivity.

<2-3 Cartridge>
Since the negatively charged dust adheres to the cylindrical electrode serving 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 achieve a predetermined discharge. In order to prevent this positional relationship from being changed even by attachment / detachment due to maintenance or the like, a plurality of cylindrical electrodes are collectively made into a cartridge and positioned and fixed in a hole of the front mounting plate that needs to be opened or closed, or By repositioning and fixing in the mounting hole, it can be re-mounted accurately. This configuration is useful for maintaining negative ion generation performance.

<2-4 Operation of Direct Release Method>
Conventionally, the negative ion generator is mainly of a type in which the emission direction is horizontal and diffused on a floor or a shelf. In the horizontal discharge method, the negative ion density rapidly decreases as the distance from the vicinity of the discharge port increases, and it is difficult to keep the entire room at a uniform density. Due to the fact that it contains ozone larger than the average molecular weight, it is difficult to send air in a mixed state of negative ions and ozone. Since the negative ions could be distributed with the rate kept low, the inventors came up with the present invention.
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 measurement value of 500,000 / cc near the discharge hole, and 65% ( 325 thousand pieces / cc, 35% in attenuation rate), whereas horizontal blowing results in 20% or less (100,000 pieces or less, 80% or more in attenuation rate). It was confirmed by actual measurement that the attenuation rate was smaller.
Further, when a plurality of opposed discharge electrodes were arranged, the attenuation rate could be further reduced. In the example using four pieces, the attenuation rate could be suppressed to 20 to 26% in a range of 3 m in diameter just below 2.5 m.
Therefore, in a space such as a Japanese-style room, if an air purifying activator incorporating four opposed discharge electrodes is mounted on 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 being attached to the ceiling at regular intervals. Of course, the effect can be locally enhanced by intensively arranging in a smoking area or the like. In particular, the installation of the ceiling is more effective for rising objects such as cigarette smoke.

<Action>
The device according to the present invention makes it possible to distribute negative ions and the like in a certain range with a small attenuation rate by blowing out the generated negative ions and a small amount of ozone directly downward without using a blower such as a fan. In this way, it is possible to achieve an accurate or average action on the target space.
With this device, (1) disinfection, (2) deodorization, (3) reduction of floating dust due to plus neutralization of suspended floating dust, (4) smoke elimination, (5) adsorption and collection of dust by cylindrical electrodes Dust, (6) Decomposition of adsorbed dust by photocatalysis of titanium oxide contained in cylindrical electrode, (7) Creation of cool environment by negative ions (forest bath effect), (8) No occurrence of electromagnetic interference It exerts more effects than the negative ion generator.
In particular, a large amount of negative ions and a small amount of ozone are generated from this device, and are emitted from the cylindrical electrode by blasting without using a blowing means such as a fan and are scattered in the air. It does not cause any adverse effects on the operation of the computer control equipment without causing any dust, and the cylindrical electrode absorbs part of the dust and reduces floating dust, so there are few restrictions on the places where it can be used. Even if it is embedded in such a place, there is little restriction on the use.

<Bactericidal action>
Strongly disinfects bacteria by the synergistic effect of negative ions and trace amounts of ozone, and also exerts an effect on O-157, which causes food poisoning. The bactericidal performance was confirmed in the test results of the growth test of Escherichia coli and blue mold.

<Deodorizing action>
Offensive odors and tobacco odors are fine particles that float in the air and adhere to everywhere. Trace amounts of ozone and negative ions can quickly decompose odor components and remove odors. A representative toilet odor deodorization test was performed using an air purifying 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 in deodorizing. Good results were also observed in the deodorization test of animal breeding rooms such as monkeys, dogs, and ferrets.

<Dust collection and smoke removal>
It can collect and deodorize carbon monoxide, dust particles of chile and tobacco smoke floating in the air, and harmful fine particles that cause hay fever and allergic patients down to 0.001 micron.
In the test for reducing the amount of suspended dust, the filter method requires half an hour, while the filter method requires half an hour, and the filter method requires 70 minutes after 30 minutes, whereas the filter method requires 60 minutes. However, a 70% reduction has not been achieved. In this device, as a result of a test using uncharged dust, when the dust comes into contact with negative ions, the dust is charged with negative ions, and is adsorbed to the positive side, floating dust is reduced, and air is reduced. It has been observed that the dust has been cleaned and a large amount of dust has adhered to the lower part of the room, such as the floor, outside the cylindrical electrode.

<Hygiene, cooling effect>
With low concentration ozone, hygiene management and photocatalytic reaction can be expected for health management and forest bathing effect due to a large amount of negative ion effect, and enjoyment of fresh and healthy life is promoted. Safe living environment can be provided by sterilization + deodorization + dust collection + smoke removal. As a result of making an air purifying activator incorporating four opposed discharge electrodes in the ward and confirming its usefulness, the number of observed bacteria that fell before and after the installation was reduced from 18% to 58%, and decreased to an average of 38%. , Has confirmed its usefulness. The air purifying activator of the present invention can be expected to be more effective because the amount and range of release of negative ions are expanded. Keeping the room air as normal as possible is one of the important infection prevention measures.

In summary, (1) sanitization, (2) deodorization, (3) reduction of suspended dust due to the plus neutralization of suspended suspended dust, (4) smoke elimination, (5) adsorption and collection of dust by cylindrical electrodes (6) decomposition of adsorbed dust by the photocatalytic action of titanium oxide contained in the tubular electrode; (7) creation of a cool environment by negative ions (forest bath effect); (8) no electromagnetic interference; (9) fan Since it is not used, the effect such as low cost, small size and light weight can be released from directly below the ceiling, so that it can work evenly.
Although the use of the air purifying activator of the present invention is not particularly limited, it can be used in general rooms, hospitals, cars, trains, commercial facilities, recreational facilities, restaurants, restaurants, beauty and barber shops, smoking areas, fresh Various facilities and individual places such as a sales floor, a food sales floor, a factory, a pet shop, an animal hospital, a ceiling, and a warehouse can be exemplified.

The present embodiment is an example of a ceiling embedded type.
FIG. 1 is an exploded view of the container of the air cleaning activator. FIG. 2 is a diagram schematically illustrating a ceiling embedded installation state. FIG. 3 is a perspective view of the air purifying activator. FIG. 4 is a perspective view of the ceiling in a ceiling embedded mounting state. FIG. 5 is a schematic view of a device arrangement in which an opposed 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 opposed discharge electrodes. FIG. 7 is an observation diagram of negative ions in the blowout direction just below. FIG. 8 is a schematic diagram of negative ion observation of a comparative example of horizontal blowing. FIG. 9 is a diagram of an example employing a cylindrical housing. FIG. 10 is a diagram illustrating an example including a rectangular outer annular body.

  FIG. 3 is an overall perspective view of the air purifying activator A of the embodiment embedded in a ceiling. The case 1 in which the negative ion generating device is incorporated is formed by a housing 11 having an opening at a lower surface, and a front mounting plate 20 detachably mounted on the opening surface of the housing and having a hole 21 for emitting 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 at least in a state where the cylindrical electrode is mounted. In the present embodiment, since the ceiling mounting type is used, the outer ring 30 is further combined with the outer ring 30 so as to overlap the outer periphery of the front mounting plate 20.

  FIG. 1 shows an exploded view of a case 1 of the present embodiment. The housing 11 is shown as a cubic box with an open lower surface. The shape of the housing does not need to be limited to a cube, and may be cylindrical as shown in FIG. It can be determined as appropriate in consideration of the arrangement of internal devices and ease of handling. The front mounting plate 20 is large enough to cover the open surface of the housing, and is provided with a negative ion emission hole 21. The 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 behind the ceiling, and the front mounting plate 20 is installed so that the emission holes 21 are substantially the same as the ceiling surface. The covering outer ring 30 is combined. The exterior annular body 30 is cut out so as not to block the negative ion emission hole 21 on the inside, and is formed in an annular shape having a width covering the notch on the ceiling. The outer shape of the outer ring 30 is free, such as circular, square, or elliptical. FIG. 10 shows an example in which a rectangular outer annular body is provided.

In the ceiling-embedded type of the present embodiment, as a fixing means to the ceiling, a method of connecting and fixing the casing 11 and the exterior annular body 30 with a ceiling plate interposed therebetween is adopted. The configuration is such that a mounting piece 12 is provided outside the open end of the housing 11, small holes 13 and 31 are provided at positions respectively corresponding to the mounting piece 12 and the exterior annular body 30, and a binding device is provided in both small holes. And fix it. In this example, a long bolt is used as the binding tool, and a female screw is formed in the small hole 13 of the mounting piece 12 to take a means for fixing by screwing. 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 the attachment of the front mounting plate 20 last is easier and more efficient during maintenance or the like. Of course, it is also possible to adopt a combination in which the outer annular body 30 is installed after the front mounting plate 20 is fixed.
FIG. 2 shows a schematic cross-sectional view of the ceiling embedded installation. FIG. 2A shows a state where the housing 11, the outer annular body 30, and the front mounting plate 20 are arranged in this order from above, and FIG. 2B shows a state where the housing 11 is installed on the ceiling plate 200. The housing 11 is inserted into the ceiling from the cutout provided in the ceiling plate 200, and placed on the back of the ceiling plate 200. Thereafter, the exterior annular body 30 is applied and positioned from the surface of the ceiling plate 200, and the bolt 40 is inserted. Then, the front mounting plate 20 on which the cylindrical electrode 101 is mounted is mounted. FIG. 4 shows a state diagram after the ceiling embedding work. The only thing you can see is that you can see the decorative board surface with four holes, so the design of the ceiling is not impaired.

FIG. 5 is a diagram illustrating a configuration of a negative ion generator.
It comprises a counter electrode 100 for corona silent discharge, a single-needle discharge electrode 120, and a high-voltage power supply unit 103 for generating a high voltage, and is 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 DC power supply, and applies a negative voltage to the needle electrode 102 and the single needle discharge electrode 120 via the cable 106, and applies a positive voltage to the cylindrical positive electrode via the cable 105. Is applied. A silent corona discharge is generated from the needle electrode 102 toward the periphery of the opening of the cylindrical electrode 101, and a short beam discharge is generated from the needle electrode 120. It has been conceived by the present inventors that air containing negative ions and a small amount of ozone is released from the counter electrode 100 at a wind speed of about 3 m / sec.
For the positive electrode and the negative electrode, a titanium oxide alloy formed by mixing titanium oxide with titanium is used to improve the durability against electric discharge. The diameter of the cylindrical positive electrode 101 is set to 19 mm, and the distance d between the needle negative electrode 102 and the cylindrical electrode 101 is set to 3 mm. The needle-shaped electrode 102 has a base diameter of 1.0 mm and a length of 13 to 14 mm, and the single needle-shaped electrode 120 has a base diameter of 1.5 mm and a length of 25 mm and is thicker and longer than a corona silent discharge electrode. Molding. A reflecting plate 121 made of aluminum was provided on the rear side of the single needle-shaped discharge electrode 120, and a safety slit was provided on the front surface. It has been confirmed by a dark box experiment that a short-beam-shaped discharge is generated from the single-needle discharge electrode 120. However, it is also confirmed that the amount of negative ions is attenuated as the distance increases, and that the directivity is weak. The present inventors have confirmed. In the example of FIG. 5, a single needle-shaped discharge electrode and a counter electrode are used in close proximity to each other, and a concave reflector is provided on the back surface of the single needle-shaped discharge electrode so that negative ions can be directed forward. The degree of concentration is to be increased. Measurements of the needle tip 30 cm showed a 1.6-2.0 fold increase. The experimental results are shown in Table 1a. The applied negative voltage was −7.5 kv at a frequency of 4 kc.
FIG. 5 shows an example in which the counter electrode 100 and the single needle-shaped discharge electrode 120 are combined, but one or a plurality of counter electrodes may be combined. In the examples shown in FIGS. 1, 3 and 4, four opposed electrodes 100 are incorporated.

6 to 8 show the test of the present invention.
<Ceiling installation test>
FIG. 6 shows a situation where the air purifying activator shown in FIG. 3 is embedded and installed in a 2.5 m ceiling. In the vicinity of the discharge hole, 500,000 negative ions per electrode were measured at a wind speed of about 3 m / sec. On the floor surface, 370,000 to 400,000 negative ions per electrode in a range of 3 m in diameter. It was measured. The decay rate is 20-26%. The rate of impairment was defined as the decay 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 purifying activator. The book discharged from 3.5 m, which is higher than the normal ceiling height, directly below using one counter electrode. An example of the invention, Comparative Example 1 in which the product was released horizontally from a height of 1.4 m as shown in FIG. 8, and Comparative Example 2 in which a product of another company was released in the same manner as Comparative Example 1.
In this embodiment, the number is 500,000 near the discharge hole. It is 1.2m to cut 400,000, 320,000 at 2.5m near normal ceiling height (36% attenuation), and 300,000 even near the floor of 3.0m-3.5m (40% attenuation). %).
On the other hand, in Comparative Example 1, the number was 400,000 at 0.5 m, halved to slightly less than 250,000 at 1.0 m, less than 100,000 at 2.5 m, and gradually decreased thereafter.
In Comparative Example 2, the number was about 200,000 in the vicinity of the discharge hole, and decreased in inverse proportion to 2.0 m, and almost no measurement was possible.
According to this test, it can be understood that the emission rate is lower when emitted downward, and that the negative ion environment can be easily formed uniformly.
A comparison between the embodiment of FIG. 7 and the embodiment of FIG. 6 shows that in the former case, the attenuation was 36% just below 2.5 m, but in the example of the plurality of electrodes in FIG. 6, the attenuation was 20%. This indicates that the attenuation rate can be reduced by combining a plurality of opposed electrodes.

Schematic exploded view of the container of the air cleaning activator Figure outlining the ceiling installation Perspective view of air purifying activator Ceiling perspective view with ceiling mounted Schematic diagram of equipment arrangement in which counter electrode and single needle electrode are used together Negative ion observation diagram of an air cleaning activator incorporating four opposed discharge electrodes Observation diagram of negative ions depending on the blowout direction right below Schematic diagram of negative ion observation of comparative example of horizontal blowing Example of cylindrical housing Example of rectangular outer ring

Explanation of reference numerals

A Air cleaning activator d Interval 1 Case 11 Case 12 Mounting piece 13, 31 Small hole 20 Front mounting plate 21 Release hole 30 Outer ring 40 Bolt 100 Opposing 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 (11)

A cylindrical electrode and a needle electrode are arranged to face each other to form an opposed discharge electrode, and the needle electrode is used as a negative electrode, and the cylindrical electrode is used as a positive electrode. An air purifying activator that emits,
The case of the air purifying activator is formed of a housing having an opening at a lower surface and a front mounting plate detachably mounted on the opening surface of the housing and having a hole for emitting negative ions,
A cylindrical electrode is mounted in the hole provided in the front mounting plate, and the front mounting plate is detachably attached to the housing in a state where at least the cylindrical electrode is mounted,
An air purifying activator characterized by discharging wind containing negative ions downward. The housing is provided with a mounting 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 slightly smaller than the housing opening and corresponding to the mounting piece,
On the surface corresponding to the mounting piece of the exterior annular plate, a small hole is provided at a position corresponding to the small hole provided in the mounting piece,
2. The air purifying activity according to claim 1, further comprising a binding device for binding the two small holes, wherein the casing and the outer annular body are connected by the binding device with an external mounting member such as a ceiling plate interposed therebetween. vessel.   3. The air purifying activator according to claim 1, wherein the front plate is attached to the housing via the outer annular body.   2. The air purifying activator according to claim 1, wherein a hanging tool is provided on a back surface to be a hanging type.   The air cleaning activator according to any one of claims 1 to 4, wherein a plurality of opposed discharge electrodes are provided.   The needle-shaped electrode is located on an extension of the axis of the tube of the cylindrical electrode, and is arranged at a distance of 1 to 5 mm, preferably 2 to 3 mm from the opening surface. An air purifying activator as described in   The air purifying activator according to any one of claims 1 to 6, wherein a single-needle discharge electrode serving as a negative electrode is combined.   The air cleaning according to any one of claims 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 opposite electrode by corona discharge. Activator.     The needle-like electrode and / or the single needle-like electrode are 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. An air purifying activator as described in   The air purifying activator according to any one of claims 1 to 9, wherein the needle electrode emits ultraviolet light together with electric discharge.   An air purifier comprising an air purifying activator main body comprising a housing having one open side, an installation plate provided with installation holes for mounting opposed discharge electrodes and / or single-needle discharge electrodes on the open side, and an outer annular plate body. An activator, wherein a mounting piece having a screw hole is provided on the outer side of the release surface of the housing, and the outer annular plate body is formed with a hole opposing the screw hole formed in the mounting piece, and The bolt for screwing a screw hole of a mounting piece and a hole of an outer ring plate in a state where a ceiling structure is sandwiched between outer ring plates is provided. Air purifier activator.