JP3966803B2 - Air cleaning activator - Google Patents

Description

【００１９】
実施例に用いた電極回路図を図４に示す。直流１２Ｖと交流を入力し、整流及びトランスを介して高電圧を針状電極２，４と筒状の正電極３に供給する。正電極に対する負電極への出力がマイナス７．５ｋｖになり、周波数が４ｋｃになるように本実施例では設定している。
本実施例では、対置電極１によるコロナ放電、単針状電極２のみによる放電及び双方の放電が対比確認できるように、回路の途中にスイッチＳ１及びスイッチＳ２を設けて給電回路を断続できるようにしている。それぞれ、次の供試体Ａ，Ｂ，Ｃの３つの態様として表されている。態様ＡはスイッチＳ１をｏｆｆ、スイッチＳ２をｏｎした場合、態様ＢはスイッチＳ１をｏｎ、スイッチＳ２をｏｆｆした場合、態様Ｃは両スイッチをｏｎした場合である。
なお、このスイッチは対比実験のために今回は設けたが、実機に設けて使用目的、環境等に合わせて選択できるようにして実用化することも可能である。
【００２０】
以下の３種類の試供体１２にて、同一条件下でマイナスイオンの波及範囲と数量を測定する。測定状態を図２に示す。空気イオンカウンター２機種１３，１４を使用して、それぞれの試供体１２を作動させ、１ｍ毎のマイナスイオン量を測定し、２つのカウンターの平均値を記録する。測定結果を表１に示す。計測状況は、室温25℃、湿度56％であった。

【００２１】

【００２２】
上記表１データから、Aコロナ放電方式では１ｍ先で152,000個のマイナスイオン量を観測でき、マイナスイオン発生器としての条件（100,000個以上）を十分に満たしているが、Ｂ単針方式に比べると、正極に吸収された分だけ、マイナスイオン量が軽減していると言わざるを得ない。しかし、４ｍ〜５ｍと離れた位置でもマイナスイオンが到達し残存しており、電子風の有無の差が出たと言える。この差はＣコロナ・単針併用方式において顕著に現れたものとなっている。４ｍ〜５ｍの位置で、Ａ及びＢの７倍〜２７倍の差が現われ、清浄効果において優れた性能を発揮するものと期待される。ＣはＡとＢを加えたマイナスイオン数よりも数倍の量が測定されており、単針放電によって発生するマイナスイオンが、コロナ放電によって生ずるマイナスイオンとオゾンの風に乗って、より遠くまで致達していることを示し、ＡとＢの組合わせ以上の量が測定されており予期し得ない作用・効果が発揮されている。
【００２３】
【対比試験】
対置電極の筒状電極と針状電極に印加する電圧の正負を逆転して、針状電極を正電極とし、筒状電極を負電極とすると、プラスイオンの発生量が極端に多く、マイナスイオンは少量となる。対比実験データを図８に示す。このような先行技術も存在するが、生成される物質が異なり、使用用途も異なるので、本発明のマイナスイオンを中心に発生させる技術とは本質的に異なる技術体系に属する技術である。
【００２４】
【実施例２】
実施例１における装置を利用して、大腸菌と青かびの生育試験を次のように行った。試験結果に見られるように、殺菌性能を確認することができた。
１．試験設備の大きさ
幅30cm×奥行13cm×高さ40cm
２．試供菌
Escherichia coli IFO No,6352（大腸菌）
Penicillium citrinum IFO No,6352（青カビ）
３．試供培地
1％ペプトン培地（大腸菌増菌用）
ブドウ糖ペプトン培地（青カビ増菌用）
デゾキシコレート寒天培地（大腸菌計測用）
ポテトデキストロース寒天培地（青カビ計測用）
４．試供希釈液
滅菌リン酸緩衝液
５．試供菌液
試供菌を増菌培地にて増菌後、希釈液で菌液を調製した。
６．試験方法
滅菌シャーレに各試供菌液20mlを注入し、室温で検体の下段に所定時間静置した。その後注入した各試供菌液1mlを、大腸菌は計測培地に混釈し35℃24時間、青カビは計測培地に重層し25℃7日間培養を行い、発生した集落数を計測した。
【００２５】

【００２６】

【００２７】
【実施例３】
実施例１に使用した空気清浄活性器を使用して、トイレ臭の消臭テストを行った。測定した臭気の種類は、〈アンモニア〉〈アセトアルデヒド〉の２種類のガスである。ガスの調整は、校正用ガス調整装置パーミエーター（株式会社ガステック製）を用いて、窒素ガスにて所定濃度に希釈し、60リットルのアクリルボックスに流し続け、テストを開始した。結果を図５、６に示す。Ｙ軸は濃度を「ｐｐｍ」表示とし、Ｘ軸は経過時間を「分」で表示している。今結果、アンモニアとホルムアルデヒドに対しては、２０分で半減し、ホルムアルデヒドは６０分で解消し、アンモニアはほぼ２０％に減少しており、消臭に効果があることが確認できた。
【００２８】
【実施例４】
実施例１で用いた空気清浄活性器を用いて動物飼育室の消臭試験を実施した。表４の如く動物飼育室の臭気等に良好な結果が認められた。
【００２９】

〈効果判定〉部屋の利用者４〜8人に感想を聞いた結果から下記の4段階に判定
◎ … 顕著な効果があった。
○ … 効果があった。
△ … 効果があるとした人と、分からないとした人が半々。
× … ほぼ全員が効果不明と答えた。
【００３０】
【参照例】
病棟において対置放電電極を４個組込んだ空気清浄活性器を作成し有用性の確認試験を実施した。表５に示されるように、設置前後において落下した観測菌数は１８％〜５８％、平均３８％に減少しており、有用性が確認できた。本発明の空気清浄活性器は、マイナスイオンの放出量および放出範囲が拡大されるので更に効果が期待できる。病室内空気を可能な限り正常に保つことは重要な感染予防手段のひとつである。
実験は、空気清浄器の能力を設置前後の落下細菌数の多少から検討した。
(1)方法
患者の居住する個室(3.8ｍ×2.6ｍ×2.6ｍ)のほぼ中央部、壁側、約1.7ｍ高さに、電子式空気清浄器を設置し、その使用前後３日間の室内落下菌を普通寒天培地にてカウントした。
培地は各部屋の一定の部位および時刻に１５分間か違法した。３日間の総落下菌数を用いた培地数で除し(総落下菌数／総培地数)た。
検討時期は、開窓、開扉の機会の少ない冬季暖房器使用時（２〜３月）及び夏季冷房使用時（６〜７月）の２回であり、おのおのの２部屋ずつを対象とした。検討期間中はできる限り開窓、開扉を避けるように患者に協力を得た。また、検討期間中に用いられた集塵紙の一部(１×２cm)を無菌生理食塩水に十分浸透後、普通寒天培地にてそれぞれの菌数計算を行った。
(2)結果
表５は落下菌数を清浄器設置前後で比較した物である。Ａ及びＢ室は冬季暖房器使用時、Ｃ及びＤ室は夏季冷房器使用時の結果である。この結果、設置前の総落下菌数は114／36(3.17)、設置後のそれは38／33(1.20)であった。
【００３１】

【００３２】
【実施例５】
実施例１と同様の空気清浄活性器を用いて大腸菌に対する殺菌効果を確認する実験を行った。結果を図７に示す。
５時間で十分な減菌作用が発揮されることが確認できた。大腸菌Ｏ１５７についても十分な作用を確認できた。生鮮食品や食品の加工場で有効に機能することが期待できる。
(1)試験方法
バイオハザードベンチ（容積350Ｌ）内にサリールKO−108（8極式）を1台設置し、寒天培地上に摂取された培養菌に対する殺菌効果を調べた。
菌株：大腸菌及び腸管出血性大腸菌
Escherichia coli ATCC95922 → 摂取菌量 ： 1.8×10⁴（／0.1ml）pfu
Escherichia coli Ｏ157：H7 → 摂取菌量 ： 1.2×10⁴（／0.1ml）pfu
培地
Nutrient agar Plates（Difoo）,Heart infusion broth
(2)結果を図７に示す。グラフの上線がEscherichia coli ATCC95922で、下線がEscherichia coli Ｏ157を示している。
【００３３】
【実施例６】
実施例１に用いた機器のうち、対置放電電極と同様の空気清浄活性器を用いて、集塵効果を確認する実験を行った。結果を図９に示す。
(1)実験は電器工業会規定法に従って行った。
テスト室内容積 ： １０ｍ³
浮遊塵埃量 ： ５ｇ(無電荷物)拡散タイプ
空気清浄活性器 ： 対置放電電極４組＋単針電極
発生高圧ユニット ： 入力ＤＣ１２ｖ、出力７．５ｋｖ
(2)集塵効果
結果は図９に示すとおりである。対比のために、市販のフィルターも実験を行った。本実施例の機器は、浮遊粉塵量が１０数分で半分に減少するのに対し、対比フィルター方式は３０分間を要しており、３０分後には７０％減少するのに対し、フィルター方式では６０分経過しても７０％の減少は達成できていない。
この実験では、電荷を持っていない粉塵を用いており、本実施例の機器を通過あるいは、マイナスイオンに接触することにより、粉塵にマイナスイオンが帯電することとなり、プラス側に吸着され、浮遊粉塵が減少し、空気が清浄にされる。この実験では、粉塵が室内の下部に多く付着しているのが判明した。
【図面の簡単な説明】
【図１ａ】：実施例１に用いる空気清浄活性器の該略図
【図１ｂ】：実施例１に用いる空気清浄活性器の電極の拡大部及び切り替え回路図
【図２】：実施例１におけるマイナスイオン観測図
【図３】：対置放電電極の電極間隔と、風速、オゾン量、マイナスイオン量の関係図
【図４】：実施例１の空気清浄活性器に用いる回路例
【図５】：実施例３のアンモニア減少図
【図６】：実施例３のホルムアルデヒド減少図
【図７】：実施例５の大腸菌殺菌効果を示す図
【図８】：対置放電電極の印加電圧と発生イオンの関係図
【図９】：実施例６の浮遊塵埃の減少図
【表１ａ】：実施例１の反射板の効果を示す表
【表１】：実施例１の各放電電極によるマイナスイオン計測量を示す表
【表２】：実施例２の大腸菌の殺菌実験結果を示す表
【表３】：実施例２の青カビの殺菌実験結果を示す表
【表４】：実施例４の動物飼育室の消臭テスト結果を示す表
【表５】：参照例における電子式空気清浄器設置による落下菌を示す表
【符号の説明】
１ ：コロナ無声放電する対置電極
２ ：単針状の放電極
３ ：筒状の正電極
４ ：針状負電極
５ａ：ケーブル
５ｂ：ケーブル
６ ：高電圧発生用の高圧電源ユニット
７ ：空気清浄活性器
８ ：外装ケース
９ ：反射板
１０：模式的に示したコロナ放電
１１：スリット
１２：試供体
１３、１４：マイナスイオン測定器
Ｓ１、Ｓ２：スイッチ[0001]
BACKGROUND OF THE INVENTION
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.
[0002]
[Prior art]
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 No. 3017146 (Patent Document 1)) By making the counter electrode cylindrical as seen in the products being implemented, it has a clear electronic wind and has a dust collection capability, so it is a fanless type It is also used as an air purifier.
[0003]
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. Examples of the single needle method include Japanese Patent Laid-Open No. 2001-321661 (Patent Document 2) and Japanese Patent Laid-Open No. 2002-193605 (Patent Document 3). Since it does not have the ability to collect dust as it is, it is sold as a negative ion generator, or it is sold with a filter or fan installed, or its generation unit incorporated into an air conditioner or fan. It can be said that the situation is similar to that of an ionizing line type corona discharge type air purifier in that a back wind means is provided.
[0004]
In the single-needle method, the reach of negative ions stops at around 3 meters, whereas in the corona discharge method that has a needle-like electrode on the negative electrode, a negative electrode is provided because the cylindrical positive electrode is provided. Although some of the more emitted electrons are absorbed by the positive electrode, wind is generated, and negative ions can be measured up to several meters away from the single-needle method by the diffusion of the electron wind.
However, in the single needle method, the amount of negative ions that can be directly measured around the device is measured more in the single needle method than in the corona discharge method. According to the latest report, it is said that the so-called ion effect cannot be exhibited with a small amount of negative ions.
[0005]
[Patent Document 1]
Patent No. 3017146 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-321661 [Patent Document 3]
JP-A-2002-193605 [0006]
[Problems to be solved by the invention]
It is to release a large amount of negative ions and a small amount of ozone far away without providing a blowing means such as a fan, thereby purifying and activating the air.
[0007]
[Means for Solving the Problems]
(1) An air cleaning activator that combines a single needle electrode without a counter electrode and a counter discharge electrode in which a cylindrical electrode and a needle electrode are arranged opposite to each other, and discharges negative ions stored in a case. An air cleaning activator characterized in that the needle electrode is a negative electrode, the cylindrical electrode is a positive electrode, and a high DC voltage is applied.
(2) The air cleaning activator according to (1), wherein one to a plurality of single needle electrodes and one to a plurality of counter discharge electrodes are used.
(3) In the counter discharge electrode described in (1) or (2), the needle-like electrode is located on the axial extension of the cylinder of the cylindrical electrode, and is arranged at an interval of 1 to 5 mm from the opening surface. An air purification activator characterized by
(4) Any one of (1) to (3), wherein negative ions are released from the single needle electrode, and negative ions and a small amount of ozone are released from the counter discharge electrode by corona discharge. An air cleaning activator as described in 1.
(5) The air cleaning activator according to any one of (1) to (4), wherein a reflector is provided on the back side of the single needle electrode.
(6) The air cleaning activator described in (5), characterized in that the reflector has a concave curved surface.
[0008]
As an electrode used in the present invention, a titanium oxide alloy produced by mixing titanium oxide developed by the present inventors with a base metal is suitable. In particular, titanium is suitable as a base material.
Both the two types of needle electrodes and cylindrical electrodes are corroded by electric discharge and inferior in durability if the material is a conventional electrode such as stainless steel. The titanium oxide alloy is excellent in durability.
The needle electrode made of titanium oxide discharges and negative ions are generated, and weak ultraviolet rays are generated. Titanium oxide contained in the cylindrical electrode exhibits a photocatalytic function.
Silent discharge corona discharge occurs in the counter discharge electrode, and negative ions generated from the needle electrode itself, negatively charged dust and ozone are generated, but some of the negative ions and negatively charged dust are It will be sucked and adsorbed by the cylindrical electrode which is the positive electrode. The cylindrical electrode accelerates the entering negative ions and discharges them as an ion wind, and functions to adsorb some dust and collect dust.
[0009]
However, due to the adsorption of dust, the distance between the needle-like electrode and the cylindrical electrode = the discharge distance changes, which causes a negative effect on the negative ion amount, wind speed, and ozone amount. Further, when dust is attracted and adsorbed, the discharge itself is also deflected, resulting in an adverse effect. In particular, when a spark or spark discharge occurs, electronic noise and a fire hazard occur. For this reason, it is important to eliminate adsorbed dust to maintain safety and performance.
Titanium oxide contained in the cylindrical electrode has a photocatalytic function, and in conjunction with the weak ultraviolet rays generated from the needle-like electrode, the photocatalytic function is exhibited and the adsorbed dust is decomposed.
[0010]
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. With respect to a pair of counter discharge electrodes used in Example 1 below, the interval between the needle electrode and the cylindrical electrode was taken on the horizontal axis, and changes in the generated wind speed, ozone amount, and negative ion amount were examined. The results are shown in FIG. In this corona discharge method, as the distance increased, the amount of generated ozone decreased, the amount of negative ions increased, and it was confirmed that the wind speed drawn a parabola with a peak at around 3 mm. Accordingly, in order to release negative ions far away, the interval is required to be about 1 to 5 mm, and preferably 2 to 4 mm. Separately, as a result of experiments on the diameter of the cylindrical electrode, it was found that 10 to 50 mm and particularly about 20 mm are suitable.
[0011]
The single needle-like electrode used alone is made of the same material as that of the counter discharge electrode, and is larger than the needle electrode used for the counter discharge electrode. Both thickness and length are about 1 to 3 times. In the embodiment, it is approximately 1.5 to 1.9 times. As shown in FIG. 3, when referring to the experiment of the counter electrode, it was discovered that when the distance between the two electrodes is increased, the amount of negative ions generated is increased although the wind speed is decreased. Furthermore, it was found that the amount of negative ions generated even when the cylindrical electrode was removed was large, but it could not be used alone, requiring a fan or other blower, and the noise and noise of the fan. In addition, it has been difficult to put it to practical use because it cannot compensate for disadvantages such as cost.
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 a single needle-like electrode used alone, 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.
[0012]
Produces a small, quiet, low-cost negative ion generator without using a blower such as a fan, and cleans and activates a single needle-like needle electrode and a counter discharge electrode close to each other As a result of experiments, it was found that the amount of negative ions exceeding the performance of both of them can be measured, and the present invention was completed.
[0013]
The apparatus of the present invention can discharge generated negative ions and a small amount of ozone over a wide range without using a blower such as a fan, and a part of dust can be adsorbed and decomposed by a cylindrical electrode. Is. Due to the action of each substance, (1) sterilization, (2) deodorization, (3) plus the reduction of floating dust due to neutralization and subsidence of unloading floating dust, (4) smoke extinction, and (5) dust cylindrical electrode Adsorbed dust collection, (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 above-mentioned operational effect is exhibited compared with the conventional negative ion generator.
The use of the air purification activator of the present invention is not particularly limited, but a single device, a general room, a hospital, a car, a train, a commercial facility, a restaurant, a fresh food department, a food department, a factory, a pet shop, Examples include various facilities and individual sites such as animal hospitals, ceilings, walls, and warehouses.
[0014]
[Action]
The effects are summarized as follows.
(1) Silent discharge of corona by counter discharge electrode A large amount of negative ions and a slight amount of ozone are generated, released from the cylindrical electrode by a wind without using a blowing means such as a fan, and dispersed in the air. Since it is a silent discharge, electronic noise is not generated and the operation of computer control equipment is hardly adversely affected. Part of dust is adsorbed by the cylindrical electrode, and suspended dust is reduced.
(2) Single needle discharge Generates a large amount of negative ions.
(3) Combined use By using a single needle-like negative electrode and a counter electrode in combination, negative ions more than the total amount of negative ions generated from each can be generated, and can be dispersed and reached in a wide range.
[0015]
(4) Effect In this method, by using both the corona discharge method and the single-needle method, it is possible to generate negative ions that more than compensate for each disadvantage. In other words, the corona discharge method generates a small amount of natural ozone along with negative ions, so it has obvious effects such as deodorization, sterilization, and bleaching, and can be used for business purposes as well. By doubling the amount of negative ions to be released, the negative ion effect can be spread to remote locations without using a fan.
・ <Bactericidal effect>
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.
・ <Deodorizing effect>
The smell of cigarettes and tobacco smells as fine particles drifting in the air or sticking everywhere. Trace amounts of ozone and negative ions can quickly decompose odorous components and remove odors.
・ <Dust collection and smoke suppression effect>
Dust and smoke can be collected and exhausted to 0.001 micron in a powerful manner up to 0.001 micron.
・ <Hygiene and refreshing 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. In summary, (1) sterilization, (2) deodorization, (3) plus suspended dust reduction due to neutralization settlement, (4) smoke extinguishing, (5) dust collection at the cylindrical electrode , (6) Decomposition of adsorbed dust by photocatalytic action of titanium oxide contained in cylindrical electrode, (7) Creation of cooling environment by negative ions (forest bath effect), (8) No electromagnetic interference, (9) Fan Since it is not used, there are effects such as low cost, small size and light weight.
[0016]
These effects are the sum of the single ions of the negative ions generated near the single needle electrode, the negative ions generated from the cylindrical electrode accompanied by the wind speed of the ion wind, and a small amount of ozone. The above negative ions can be released far, and a greater effect is exhibited.
[0017]
Embodiment
The combination of the number of single needle-like discharge electrodes and the number of counter electrodes of the corona silent discharge electrode can be set appropriately and determined according to the installation object. The number of negative ions generated, the amount of ozone, and the wind speed can also be controlled by adjusting the voltage. In addition, the amount of ozone generated, the number of negative ions, and the wind speed can be controlled by changing the distance between the needle electrode and the cylindrical electrode for corona silent discharge.
[0018]
[Example 1]
This will be described using the example of the apparatus described in FIG.
Reference numeral 7 denotes an air cleaning activator, which is composed of a counter electrode 1 that performs corona silent discharge, a single needle-like discharge electrode 2, and a high-voltage power supply unit 6 for generating a high voltage, and is housed in an outer case 8. The counter electrode 1 includes two needle-like negative electrodes 4 and two cylindrical positive electrodes 3 provided to face the needle-like electrodes. The high-voltage power supply unit 6 is a DC power supply, and applies a negative voltage to the needle-like electrodes 2 and 4 via the cable 5a, and applies a positive voltage to the cylindrical positive electrode via the cable 5b. The corona discharge 10 schematically shown from the acicular electrode 4 toward the opening edge of the cylindrical electrode 3 is generated, and the short electrode-shaped discharge is generated from the acicular electrode 2. About a wind speed and ozone, it generate | occur | produces according to FIG.
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 3 is set to 19 mm, and the interval between the needle-shaped negative electrode 4 and the cylindrical electrode 4 is set to 3 mm. An enlarged view of the electrode part is shown in FIG. The needle electrode 4 has a base diameter of 1.0 mm and a length of 13 to 14 mm, and the single needle electrode has a base diameter of 1.5 mm and a length of 25 mm, and the single needle shape is thicker and longer than an electrode for silent discharge. is doing. An aluminum reflector 9 is provided on the rear side of the single needle-shaped discharge electrode 2 and a safety slit 11 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-like discharge electrode 2, but it is confirmed that the amount of negative ions attenuates as the distance increases, and the directivity is weak. discovered. Therefore, when the concave reflecting plate 9 is provided on the back surface of the single needle-shaped discharge electrode 2, the degree of concentration of negative ions forward can be increased. 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.
Table 1a

[0019]
An electrode circuit diagram used in the example is shown in FIG. DC 12V and AC are input, and a high voltage is supplied to the needle-like electrodes 2 and 4 and the cylindrical positive electrode 3 through rectification and a transformer. In this embodiment, the output from the positive electrode to the negative electrode is minus 7.5 kv and the frequency is 4 kc.
In the present embodiment, a switch S1 and a switch S2 are provided in the middle of the circuit so that the corona discharge by the counter electrode 1, the discharge by only the single needle electrode 2, and both discharges can be confirmed. ing. Each of them is represented as three aspects of the following specimens A, B, and C. Aspect A is when switch S1 is turned off and switch S2 is turned on, Aspect B is when switch S1 is turned on and switch S2 is turned off, and Aspect C is a case where both switches are turned on.
Although this switch is provided for comparison experiments this time, it can also be put into practical use by being provided in an actual machine so that it can be selected according to the purpose of use, environment, and the like.
[0020]
The following three types of specimens 12 measure the spillover range and quantity of negative ions under the same conditions. The measurement state is shown in FIG. Using the two types of air ion counters 13 and 14, each specimen 12 is operated, the amount of negative ions per meter is measured, and the average value of the two counters is recorded. The measurement results are shown in Table 1. The measurement situation was room temperature 25 ° C. and humidity 56%.

[0021]

[0022]
From the data in Table 1 above, the A corona discharge method can observe 152,000 negative ions at a distance of 1 m, which fully satisfies the conditions (100,000 or more) as a negative ion generator, but compared to the B single needle method. In other words, the amount of negative ions is reduced by the amount absorbed by the positive electrode. However, it can be said that the negative ions arrive and remain even at a distance of 4 m to 5 m, and that there is a difference in the presence or absence of electron wind. This difference is noticeable in the C corona / single needle combination method. A difference of 7 to 27 times of A and B appears at a position of 4 to 5 m, and it is expected to exhibit excellent performance in the cleaning effect. C is measured several times the number of negative ions plus A and B, and the negative ions generated by single-needle discharge ride on the negative ions generated by corona discharge and the wind of ozone and go farther. It shows that it has reached the limit, and an amount more than the combination of A and B is measured, and an unexpected action / effect is exhibited.
[0023]
[Contrast test]
When the positive and negative voltages applied to the cylindrical electrode and needle electrode of the counter electrode are reversed so that the needle electrode is a positive electrode and the cylindrical electrode is a negative electrode, the amount of positive ions generated is extremely large, and negative ions Becomes a small amount. The comparison experimental data is shown in FIG. Although such prior art exists, since the substances to be produced are different and the usage is different, the technique belongs to a technical system that is essentially different from the technique of generating negative ions mainly of the present invention.
[0024]
[Example 2]
Using the apparatus in Example 1, E. coli and green mold growth tests were performed as follows. As can be seen from the test results, the bactericidal performance could be confirmed.
1. Test equipment size 30cm wide x 13cm deep x 40cm high
2. Test bacteria
Escherichia coli IFO No, 6352 (Escherichia coli)
Penicillium citrinum IFO No, 6352 (blue mold)
3. Sample medium
1% peptone medium (for E. coli enrichment)
Glucose peptone medium (for blue mold enrichment)
Dezoxycholate agar medium (for E. coli measurement)
Potato dextrose agar medium (for blue mold measurement)
4). 4. Sample diluent sterile phosphate buffer Test Bacterial Solution After increasing the test bacteria in the enrichment medium, a bacterial solution was prepared with a diluted solution.
6). Test Method 20 ml of each test bacterial solution was poured into a sterile petri dish and allowed to stand at the bottom of the specimen for a predetermined time at room temperature. Thereafter, 1 ml of each of the injected test bacterial solutions was mixed with E. coli in a measurement medium and cultured at 35 ° C. for 24 hours. Blue mold was layered on the measurement medium and cultured at 25 ° C. for 7 days.
[0025]

[0026]

[0027]
[Example 3]
Using the air cleaning activator used in Example 1, a toilet deodorization test was conducted. The types of odors measured are two types of gases, <ammonia> and <acetaldehyde>. For gas adjustment, a gas adjusting device permeator for calibration (manufactured by Gastec Co., Ltd.) was used to dilute to a predetermined concentration with nitrogen gas and continue to flow into a 60 liter acrylic box, and the test was started. The results are shown in FIGS. The Y-axis displays the concentration as “ppm” and the X-axis displays the elapsed time as “minutes”. As a result, it was confirmed that ammonia and formaldehyde were halved in 20 minutes, formaldehyde was eliminated in 60 minutes, and ammonia was reduced to almost 20%, which was effective in deodorization.
[0028]
[Example 4]
The deodorization test of the animal breeding room was conducted using the air cleaning activator used in Example 1. As shown in Table 4, good results were observed in the odor of the animal breeding room.
[0029]

<Effect determination> Judgment was made in the following four stages based on the results of hearing the opinions of 4 to 8 users in the room.
○… There was an effect.
△… Half of the people who said it was effective and half of the people who didn't understand.
×… Almost everyone answered that the effect was unknown.
[0030]
[Reference example]
In the ward, an air cleaning activator incorporating four counter discharge electrodes was prepared and a usefulness confirmation test was conducted. As shown in Table 5, the number of observed bacteria dropped before and after installation was reduced to 18% to 58% and an average of 38%, confirming the 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 the experiment, the ability of the air purifier was examined from the number of bacteria falling before and after installation.
(1) Method An electronic air purifier is installed in the center of the private room (3.8m x 2.6m x 2.6m) where the patient resides, on the wall side, at a height of about 1.7m. Falling bacteria were counted on a normal agar medium.
The medium was illegal for 15 minutes at certain locations and times in each room. The total number of falling bacteria for 3 days was divided by the number of culture media (total number of falling bacteria / total number of culture media).
The examination period is two times, when using a winter heater (February to March) and summer cooling (June to July) when there is little opportunity to open and open the doors, and each two rooms are targeted. . During the study period, patients were asked to cooperate to avoid opening and opening as much as possible. In addition, a part (1 × 2 cm) of the dust collection paper used during the study period was sufficiently infiltrated into sterile physiological saline, and then the number of bacteria was calculated on a normal agar medium.
(2) Results Table 5 compares the number of bacteria falling before and after installing the purifier. Room A and B are the results when using a winter heater, and rooms C and D are the results when using a summer air conditioner. As a result, the total number of bacteria falling before installation was 114/36 (3.17), and that after installation was 38/33 (1.20).
[0031]

[0032]
[Example 5]
An experiment was conducted to confirm the bactericidal effect against E. coli using the same air purification activator as in Example 1. The results are shown in FIG.
It was confirmed that a sufficient sterilizing effect was exhibited in 5 hours. A sufficient action was also confirmed for E. coli O157. It can be expected to function effectively in fresh food and food processing plants.
(1) Test method One Salil KO-108 (8-pole type) was installed in a biohazard bench (capacity 350 L), and the bactericidal effect on the cultured bacteria ingested on the agar medium was examined.
Strains: Escherichia coli and enterohemorrhagic Escherichia coli
Escherichia coli ATCC95922 → Intake amount: 1.8 × 10 ⁴ (/0.1 ml) pfu
Escherichia coli O157: H7 → Intake amount: 1.2 × 10 ⁴ (/0.1ml) pfu
Culture medium
Nutrient agar Plates (Difoo), Heart infusion broth
(2) The results are shown in FIG. The upper line of the graph is Escherichia coli ATCC95922, and the lower line is Escherichia coli O157.
[0033]
[Example 6]
The experiment which confirms a dust collection effect was done using the air purifier activator similar to a counter discharge electrode among the apparatuses used for Example 1. FIG. The results are shown in FIG.
(1) The experiment was conducted according to the electrical industry association regulation method.
Test chamber volume: 10m ³
Airborne dust amount: 5g (uncharged) diffusion type air purifier activator: 4 pairs of counter discharge electrodes + single needle electrode generating high voltage unit: DC12v, output 7.5kv
(2) The dust collection effect results are as shown in FIG. For comparison, a commercial filter was also tested. In the device of this example, the amount of suspended dust is reduced to half in 10 minutes, whereas the contrast filter method requires 30 minutes, and after 30 minutes, it decreases by 70%, whereas in the filter method, Even after 60 minutes, 70% reduction has not been achieved.
In this experiment, dust that does not have a charge is used, and when passing through the device of this embodiment or coming into contact with negative ions, the negative ions are charged to the dust, adsorbed on the positive side, and suspended dust. Decreases and the air is cleaned. In this experiment, it was found that much dust adhered to the lower part of the room.
[Brief description of the drawings]
FIG. 1a: Schematic diagram of an air cleaning activator used in Example 1. FIG. 1b: Enlarged portion and switching circuit diagram of an electrode of the air cleaning activator used in Example 1. FIG. Ion observation diagram [Fig. 3]: Relationship between electrode spacing of counter discharge electrode, wind speed, ozone amount, and negative ion amount [Fig. 4]: Circuit example used for the air cleaning activator of Example 1 [Fig. 5]: Implementation Ammonia reduction diagram of Example 3 [FIG. 6]: Formaldehyde reduction diagram of Example 3 [FIG. 7]: Diagram showing the bactericidal effect of Escherichia coli in Example 5 [FIG. 8]: Relationship between applied voltage of counter discharge electrode and generated ions [FIG. 9]: Decrease in suspended dust of Example 6 [Table 1a]: Table showing the effect of the reflector of Example 1 [Table 1]: Table showing the amount of negative ions measured by each discharge electrode of Example 1 [Table 2]: Table showing results of sterilization experiment of Escherichia coli of Example 2 [Table 3]: Table showing the results of the sterilization experiment of the blue mold of Example 2 [Table 4]: Table showing the results of the deodorization test in the animal breeding room of Example 4 [Table 5]: The bacteria dropped by installing the electronic air cleaner in the reference example Table [Explanation of symbols]
1: Counter electrode for corona silent discharge 2: Single needle-shaped discharge electrode 3: Cylindrical positive electrode 4: Needle-shaped negative electrode 5a: Cable 5b: Cable 6: High-voltage power supply unit 7 for generating high voltage: Air cleaning activity Instrument 8: Exterior case 9: Reflector 10: Corona discharge schematically shown 11: Slit 12: Specimen 13, 14: Negative ion measuring instrument S1, S2: Switch

Claims (6)

An air purification activator that combines a single needle electrode without a counter electrode and a counter discharge electrode in which a cylindrical electrode and a needle electrode are opposed to each other, and discharges negative ions stored in a case. An air cleaning activator characterized in that an electrode is a negative electrode, a cylindrical electrode is a positive electrode, and a high DC voltage is applied.   2. The air cleaning activator according to claim 1, wherein one or more single needle-like electrodes and one or more pairs of counter discharge electrodes are used. The opposed discharge electrode according to claim 1 or 2, wherein the needle-like electrode is located on an extension of the axis of the cylinder of the cylindrical electrode, and is arranged at an interval of 1 to 5 mm from the opening surface. Air purifier activator.   The air according to any one of claims 1 to 3, wherein negative ions are released from a single needle-like electrode, and negative ions and a small amount of ozone are released from a counter discharge electrode by corona discharge. Clean activator.   The air purification activator according to any one of claims 1 to 4, wherein a reflector is provided on the back side of the single needle electrode. 6. The air cleaning activator according to claim 5, wherein the reflecting plate has a concave curved surface.

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