JP4722350B2 - Air purifier - Google Patents

Air purifier Download PDF

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Publication number
JP4722350B2
JP4722350B2 JP2001338570A JP2001338570A JP4722350B2 JP 4722350 B2 JP4722350 B2 JP 4722350B2 JP 2001338570 A JP2001338570 A JP 2001338570A JP 2001338570 A JP2001338570 A JP 2001338570A JP 4722350 B2 JP4722350 B2 JP 4722350B2
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Japan
Prior art keywords
unit
antibacterial
photocatalyst
filter
photocatalytic
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JP2001338570A
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JP2003102815A6 (en
JP2003102815A (en
Inventor
理 包
仁 新沼
竜司 増田
隆行 野倉
てる子 高山
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Nippon Muki Co Ltd
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Nippon Muki Co Ltd
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  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Catalysts (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Filtering Materials (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、光触媒フィルタユニットと抗菌フィルタユニットと殺菌灯ユニットとを備えた除菌機能を有する空気清浄装置に関する。
【0002】
【従来の技術】
従来、光触媒フィルタとともに、抗菌フィルタのような抗菌手段、或いは、殺菌灯のような殺菌手段を備えた除菌機能を有する空気清浄装置としては、例えば、特開平10−85558号公報に開示されているように、光触媒ユニットと抗菌フィルタとを積層させ、光触媒ユニットを太陽光側に向けるようにした濾過材を空気循環路に配設したものや、特開平11−192405号公報に開示されるように、光触媒フィルタと中性能フィルタとの間に紫外線ランプを配設した空調装置などが知られている。
【0003】
【発明が解決しようとする課題】
前記光触媒フィルタと抗菌フィルタとを積層させた濾過材を空気循環路に配設した空気清浄装置の場合は、自然光と光触媒の組合せでは光触媒反応が弱く、除菌効果が長期間に亘って充分に発揮できないため、抗菌フィルタのみが装置全体の除菌効果を左右し、除菌効果が不十分という不都合を有していた。また、光触媒フィルタと中性能フィルタとの間に紫外線ランプを配設した空調装置の場合は、紫外線ランプと光触媒の組合せによる光触媒反応のみが装置全体の除菌効果を左右しているため、除菌効果そのものが初期から低いという不都合があった。
そこで本発明は、優れた除菌効果を長期に亘って維持できる空気清浄装置を提供することを目的とする。
【0004】
【課題を解決するための手段】
本発明者は、前記要望に応えるべく鋭意検討の結果、光触媒機能を備えた光触媒濾過材をユニットケーシング内に組み込んだ光触媒フィルタユニットと、抗菌機能を備えた抗菌濾過材をユニットケーシング内に組み込んだ抗菌フィルタユニットと、殺菌灯をユニットケーシング内に組み込んだ殺菌灯ユニットを組み合わせて使用することにより極めて長期に亘り優れた除菌効果を維持でき、しかも、優れたガス除去効果も得られることを知見した。
本発明の空気清浄装置はかかる知見に基づきなされたもので、請求項1に記載の通り、光触媒機能を備えた光触媒濾過材をユニットケーシング内に組み込んだ光触媒フィルタユニットと、抗菌機能を備えた抗菌濾過材をユニットケーシング内に組み込んだ抗菌フィルタユニットと、殺菌灯をユニットケーシング内に組み込んだ殺菌灯ユニットを有し、これらユニットを連結自在としたことを特徴とする。
また、請求項2記載の空気清浄装置は、請求項1記載の空気清浄装置において、
前記光触媒フィルタユニットの上流側に前記抗菌フィルタユニットを配置したことを特徴とする。
【0005】
【発明の実施の形態】
本発明の空気清浄装置は、例えば、ファンフィルタユニットなど、少なくとも光触媒機能を備えた光触媒濾過材をユニットケーシング内に組み込んだ光触媒フィルタユニットと、抗菌機能を備えた抗菌濾過材をユニットケーシング内に組み込んだ抗菌フィルタユニットと、殺菌灯をユニットケーシング内に組み込んだ殺菌灯ユニットとを含む空気清浄装置であれば、特にその種類や構成は限定されるものではない。例えば、一般室内環境とその空調設備、クリーンルームとその空調設備、ミニエンバイロメント等の局所制御空間、クリーンベンチ、エアシャワー装置、パスボックス、トンネルユニット、クリーンストッカ、クリーンブース、クリーンセル(清浄空気吹出装置)等の空気清浄設備や装置において、光触媒機能を備えた光触媒濾過材をユニットケーシング内に組み込んだ光触媒フィルタユニットと、抗菌機能を備えた抗菌濾過材をユニットケーシング内に組み込んだ抗菌フィルタユニットと、殺菌灯をユニットケーシング内に組み込んだ殺菌灯ユニットとを組み込んで構成する場合も本発明の空気清浄装置として含まれるものである。
【0006】
図1は、本発明空気清浄装置の一構成例を示すもので、上流側より光触媒機能を備えた光触媒濾過材100aをユニットケーシング100b内に組み込んだ光触媒フィルタユニット100と、殺菌灯110aをユニットケーシング110b内に組み込んだ殺菌灯ユニット110と、前記光触媒フィルタユニット100と、抗菌機能を備えた抗菌濾過材120aをユニットケーシング120b内に組み込んだ抗菌フィルタユニット120とを積層し、キャッチクリップ130で連結して一体化して空気清浄装置として構成したものである。
また、図2は他構成例を示すもので、前記構成例における抗菌フィルタユニット120を最上流側に配置して、その下流側に光触媒フィルタユニット100、殺菌灯ユニット110、光触媒ユニット100の順に積層し、キャッチクリップ130で連結して一体化して空気清浄装置として構成したものである。
【0007】
また、図3は参考例を示すもので、ケーシング140内に上流側から前記構成例の光触媒濾過材100a、殺菌灯110a、光触媒濾過材100a、抗菌濾過材120aを配設し、空気清浄装置として構成したものである。
尚、本構成例では殺菌灯110aの下流側の光触媒濾過材100aと抗菌濾過材120aとは重ね合わせて用いるようにしている。
図4は更なる他参考例を示すもので、前記構成例における抗菌濾過材120aを最上流側に配置して、その下流側に光触媒濾過材100a、殺菌灯ユニット110a、光触媒濾過材100aの順に配置して空気清浄装置として構成したものである。
尚、本参考例でも殺菌灯110aの上流側の抗菌濾過材120aと光触媒濾過材100aとは重ね合わせて用いるようにしている。
【0008】
前記光触媒濾過材を構成する光触媒としては、光照射により励起され、ガス状汚染物質を分解できるものであればいずれでもよい。酸化チタンや酸化亜鉛など、数多くのものが提案されているが、分解効率や、安全性、安定度の点からは酸化チタンが好ましい。この酸化チタンは、ルチル型、アナターゼ型あるいはこれらの共存形のいずれでも構わないが、低エネルギの光を反応させるには、ルチル型が適しており、また、反応の活性を高めるには、アナターゼ型が適している。また、前記光触媒に、Pt,Ag,Pd,RuO,Coの添加が、ガス状汚染物質の分解作用が促進されるので好ましい。
【0009】
また、前記光触媒濾過材の形状は、クロス状、ハニカム状、ペーパ状等があり、いずれの形状でも構わないが、圧損上昇を低く抑えられ、且つ紫外線の漏洩がなく各種ガス状汚染物質の分解が安全に行われることから、10〜50%の開口率を有する網目状基材に光触媒を固定化させてなる通気性シートとすることが好ましい。前記開口率が10%未満となると、光透過性が低下することに加え、通気性も悪くなり、圧損が大きくなるおそれがあり、開口率が50%を超えると、光触媒の効果が低減することに加え、紫外線が外部へ漏洩し安全性が問題となる。また、光触媒自体は加熱再生が容易であることから、耐熱性基材の使用が好ましい。
更に、ガス状汚染物質の吸着機能の点からは、基材表面が酸処理等により多孔質化されたものの使用が好ましい。
【0010】
また、前記殺菌灯としては低波長254nmの紫外線ランプの使用が好ましい。このような殺菌灯は光触媒への有効照射光量を強くでき、光触媒作用が強くなることや、オゾンレスであることから好ましい。特に、医療、薬品、食品などバイオロジカル分野においては、殺菌灯と光触媒の併用は除菌効果が高いことから好ましい。更に、クリーンルームにおいては、菌や微生物の除去にも対応できる。
【0011】
また、前記抗菌濾過材としては、例えば、各種除塵濾過材に無機系抗菌剤(銀、銅等の金属系)、や、天然物系抗菌剤(溶菌酵素等)が付加されたものが使用され、そのような除塵濾過材としては、ULPA濾過材、HEPA濾過材、中性能濾過材、粗塵用濾過材等、所望の清浄度に応じ、任意の除塵濾過材が使用される。
【0012】
また、前記光触媒濾過材を長寿命化する観点から、前記光触媒濾過材の上流側に前記除塵機能を持つ抗菌濾過材を設けることにより、光触媒濾過材表面への塵埃付着を防ぎ、光触媒反応による除菌効果を長期に亘って十分に引き出せるため、そうすることが好ましい。
【0013】
また、前記ケーシングユニット、或いは、ケーシングはガルバリウム鋼板、アルミ圧延材等、少なくとも光触媒濾過材、抗菌濾過材、殺菌灯を固定できるものであれば、特にその材質や構成は限定されるものではない。尚、ケーシングユニットとして構成したので、任意にその配置や組み合わせを選択でき、所望の空気清浄装置として組み立てることができる。
【0014】
【実施例】
以下、本発明の空気清浄装置の具体的な実施例を比較例と共に説明する。
(実施例1)
図5乃至図10は本実施例装置を示すものであって、下方から順に、抗菌フィルタユニット11と、光触媒ユニット12と、殺菌灯ユニット13と、光触媒ユニット12とが、4段に積層され、互いにキャッチクリップ14で連結自在に一体となっている。尚、図中15は取っ手を示す。
前記抗菌フィルタユニット11は、天然物系抗菌剤である溶菌酵素(プロタミン及びリゾチーム)を共有結合により固定化した中性能濾過材11aをケーシング11bに気密に収容したものを使用した。
前記光触媒ユニット12,12間に介装される殺菌灯ユニット13内には、図5乃至図7に示すように、光源13aとして、波長254nmの紫外線ランプが4本並行に等間隔に配列されている。
前記各光触媒ユニット12は、後記詳述する触媒ホルダー20を12個備えるもので、図5に示すように、図面で上下方向に3個ずつ、左右方向4列の配置とされている。そして各列毎に、ガイドレール12aが左右両側に設けられており、触媒ホルダー20はこのガイドレール12aに案内されて、シール剤を用いることなくメカニカルシールされた状態で触媒ボックス内12内に収容されることとなる。尚、触媒ホルダー20を触媒ボックス12内に収容したり、取り出したりする際には、上側のガイドレール12aを固定しているビス12bを弛めて、ガイドレール12aの一部を取り外すことで、簡単に行える。
【0015】
前記触媒ホルダー20は、図9及び図10に詳細を示したとおり、枠体20aの一部をビス20bで取り外し自在とされ、また、枠体20a内にはガイドレール20cが設けられ、アナターゼ型の酸化チタンからなる光触媒を繊維径9μmのEガラス繊維からなる開口率25%のガラスクロスに5質量%坦持させてなる195×145mm×0.6mmの通気性シート状光触媒体20dを4枚、ガイドレール20cに案内されて、シール剤を用いることなくメカニカルシールされた状態で触媒ホルダー20内に収容できるようになっている。
【0016】
かくして、図6及び図7に示すように、下方から順に、抗菌フィルタユニット11と、光触媒ユニット12と、殺菌灯ユニット13と、光触媒ユニット12とをキャッチクリップ14で留めて、4段に積層した際には、通気性シート状光触媒体20dが光源13aを挟んで上下方向に4層ずつ、それぞれ気流の通過方向に離間状態で積層配置されることになる。
【0017】
(実施例2)
実施例1の空気清浄装置の配置を、図11に示すように、下方から順に、光触媒ユニット12と、殺菌灯ユニット13と、光触媒ユニット12と抗菌フィルタユニット11とを、4段に積層したものを実施例2とした。
【0018】
(比較例1)
図1の空気清浄装置の抗菌フィルユニットのみを用いたものを比較例1とした。
【0019】
(比較例2)
図1の空気清浄装置の殺菌灯ユニットのみを用いたものを比較例2とした。
【0020】
(比較例3)
図1の空気清浄装置の殺菌灯ユニットを蛍光灯ユニットに替え、抗菌フィルタユニットを除いたものを比較例3とした。
【0021】
(比較例4)
図1の空気清浄装置の抗菌フィルタユニットを除いたものを比較例4とした。
【0022】
(比較例5)
実施例1の殺菌灯ユニットを蛍光灯ユニットに換えたものを比較例5とした。
【0023】
(比較例6)
実施例2の殺菌灯ユニットを蛍光灯ユニットに換えたものを比較例6とした。
【0024】
次に、このようにして得られた実施例1及び2並びに比較例1乃至6の各空気清浄装置について、下記の特性につき試験・評価した。
(除菌効果)
(1)上記各空気清浄装置を、600mの実験室内の空調系に据え付けた後、運転を開始した。
(2)携帯型空中浮遊菌サンプラMBS−1000(ミドリ安全(株))を用いて、前記各空気清浄装置の直下において、100リットル/分×10分で1mサンプリングした。
(3)捕集培地には細菌用トリプトソイ生寒天培地(90mmシャーレ)を使用し、培養条件は、35℃、48時間で行った。
(4)培養後培地あたりの発見コロニー数(個)とサンプリング空気量(m)から気中浮遊菌濃度(個/m)を求め、その結果を表1に示した。
(5)なお、空気清浄装置運転前の室内雰囲気中の浮遊菌濃度は、約50CFU/m(CFU:細菌の生存菌数)であった。
【0025】
【表1】

Figure 0004722350
【0026】
このように、実施例1の空気清浄装置によれば、優れた除菌効果とガス除去効果が得られ、また、実施例2のように抗菌フィルタ部を光触媒フィルタ部の上流側に配置した場合には、極めて優れた除菌効果が得られるとともにそれが長期に亘って維持できることが確認できた。
【0027】
【発明の効果】
このように、本発明の空気清浄装置によれば、除塵機能やガス除去機能に加え、優れた除菌効果を長期に亘って維持できる空気清浄装置が得られる。
【図面の簡単な説明】
【図1】 本発明空気清浄装置の一構成例正面図
【図2】 本発明空気清浄装置の他構成例の正面図
【図3】 本発明空気清浄装置の参考例の正面図
【図4】 本発明空気清浄装置の更なる他参考例の正面図
【図5】 本発明空気清浄装置の一実施例の平面図
【図6】 同正面図
【図7】 図5のVII−VII線断面図
【図8】 図7の要部拡大断面図
【図9】 触媒ユニットに装着される触媒ホルダーの斜視図
【図10】同分解状態で示した斜視図
【図11】本発明空気清浄装置の他実施例の正面図
【符号の説明】
11 抗菌フィルタユニット
11a 抗菌濾過材
11b ケーシング
12 光触媒ユニット
12 触媒ボックス
12a ガイドレール
12b ビス
13 殺菌灯ユニット
13a 殺菌灯
14 キャッチクリップ
15 取っ手
20 触媒ホルダー
20a 枠体
20b ビス
20c ガイドレール
20d 通気性シート状光触媒体
100a 光触媒濾過材
100b ユニットケーシング
100 光触媒フィルタユニット
110a 殺菌灯
110b ユニットケーシング
110 殺菌灯ユニット
120a 抗菌濾過材
120b ユニットケーシング
120 抗菌フィルタユニット
130 キャッチクリップ
140 ケーシング[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air cleaning device having a sterilization function, which includes a photocatalytic filter unit, an antibacterial filter unit, and a germicidal lamp unit .
[0002]
[Prior art]
Conventionally, an air cleaning device having a sterilizing function provided with an antibacterial means such as an antibacterial filter or a sterilizing means such as a sterilizing lamp together with a photocatalytic filter is disclosed in, for example, JP-A-10-85558. As described above, a photocatalyst unit and an antibacterial filter are stacked, and a filter medium in which the photocatalyst unit is directed to the sunlight side is disposed in the air circulation path, or disclosed in JP-A-11-192405. In addition, an air conditioner in which an ultraviolet lamp is provided between a photocatalytic filter and a medium performance filter is known.
[0003]
[Problems to be solved by the invention]
In the case of an air cleaning device in which a filter medium in which the photocatalyst filter and the antibacterial filter are laminated is arranged in the air circulation path, the combination of natural light and the photocatalyst has a weak photocatalytic reaction, and the sterilization effect is sufficient for a long period of time. Since it cannot be demonstrated, only the antibacterial filter affects the sterilization effect of the entire device, and has the disadvantage that the sterilization effect is insufficient. In the case of an air conditioner in which an ultraviolet lamp is disposed between the photocatalyst filter and the medium performance filter, only the photocatalytic reaction by the combination of the ultraviolet lamp and the photocatalyst affects the sterilization effect of the entire apparatus. There was a disadvantage that the effect itself was low from the beginning.
Then, an object of this invention is to provide the air purifying apparatus which can maintain the outstanding microbe elimination effect over a long period of time.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to meet the above demands, the present inventor has incorporated a photocatalytic filter unit having a photocatalytic function into a unit casing, and an antibacterial filtering material having an antibacterial function incorporated into the unit casing. Knowledge that an antibacterial filter unit and a germicidal lamp unit incorporating a germicidal lamp in the unit casing can be used in combination to maintain an excellent sterilizing effect for an extremely long time, and an excellent gas removing effect can also be obtained. did.
The air purifying apparatus of the present invention has been made based on such knowledge, and as described in claim 1, a photocatalytic filter unit in which a photocatalytic filter material having a photocatalytic function is incorporated in a unit casing, and an antibacterial function having an antibacterial function. It has an antibacterial filter unit in which a filter medium is incorporated in a unit casing, and a germicidal lamp unit in which a germicidal lamp is incorporated in a unit casing, and these units are connectable .
The air cleaning device according to claim 2 is the air cleaning device according to claim 1,
The antibacterial filter unit is disposed upstream of the photocatalytic filter unit .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The air cleaning device of the present invention includes, for example, a photocatalytic filter unit in which at least a photocatalytic filter material having a photocatalytic function such as a fan filter unit is incorporated in a unit casing, and an antibacterial filter material having an antibacterial function in the unit casing. As long as it is an air cleaning device including an antibacterial filter unit and a germicidal lamp unit in which a germicidal lamp is incorporated in a unit casing, the type and configuration are not particularly limited. For example, general indoor environment and its air conditioning equipment, clean room and its air conditioning equipment, local control space such as mini-environment, clean bench, air shower device, pass box, tunnel unit, clean stocker, clean booth, clean cell (clean air blowing In an air cleaning facility or device such as a device), a photocatalytic filter unit incorporating a photocatalytic filter material having a photocatalytic function in a unit casing, and an antibacterial filter unit incorporating an antibacterial filter material having an antibacterial function in the unit casing The case where the germicidal lamp unit in which the germicidal lamp is incorporated in the unit casing is incorporated is also included as the air cleaning device of the present invention.
[0006]
FIG. 1 shows an example of the configuration of an air purifying apparatus according to the present invention. A photocatalytic filter unit 100 in which a photocatalytic filter material 100a having a photocatalytic function is incorporated into a unit casing 100b from the upstream side, and a sterilizing lamp 110a are unit casings. The germicidal lamp unit 110 incorporated in 110b, the photocatalytic filter unit 100, and the antibacterial filter unit 120 in which the antibacterial filter material 120a having an antibacterial function is incorporated in the unit casing 120b are laminated and connected by a catch clip 130. And integrated into an air purifier.
FIG. 2 shows another configuration example. The antibacterial filter unit 120 in the above configuration example is arranged on the most upstream side, and the photocatalytic filter unit 100, the germicidal lamp unit 110, and the photocatalytic unit 100 are stacked in that order on the downstream side. And it connects and integrates with the catch clip 130, and is comprised as an air purifying apparatus.
[0007]
FIG. 3 shows a reference example . In the casing 140, the photocatalyst filter material 100a, the sterilization lamp 110a, the photocatalyst filter material 100a, and the antibacterial filter material 120a of the above configuration example are arranged from the upstream side as an air cleaning device. It is composed.
In this configuration example, the photocatalyst filter material 100a and the antibacterial filter material 120a on the downstream side of the germicidal lamp 110a are used in an overlapping manner.
FIG. 4 shows still another reference example . The antibacterial filter material 120a in the above configuration example is arranged on the most upstream side, and the photocatalyst filter material 100a, the germicidal lamp unit 110a, and the photocatalyst filter material 100a are arranged in this order on the downstream side. It is arranged and configured as an air cleaning device.
In this reference example , the antibacterial filter material 120a on the upstream side of the germicidal lamp 110a and the photocatalyst filter material 100a are used in an overlapping manner.
[0008]
As the photocatalyst constituting the photocatalyst filtering material, any photocatalyst that can be excited by light irradiation and decompose gaseous contaminants may be used. Many things such as titanium oxide and zinc oxide have been proposed, but titanium oxide is preferred from the viewpoint of decomposition efficiency, safety, and stability. This titanium oxide may be in the rutile type, anatase type, or a coexistence type thereof. However, the rutile type is suitable for reacting light of low energy, and an anatase is used for enhancing the activity of the reaction. The type is suitable. In addition, it is preferable to add Pt, Ag, Pd, RuO 2 , and Co 3 O 4 to the photocatalyst because the decomposition action of gaseous pollutants is promoted.
[0009]
In addition, the photocatalyst filter material may have a cross shape, a honeycomb shape, a paper shape, etc., and any shape can be used. However, the increase in pressure loss can be suppressed to a low level, and there is no leakage of ultraviolet rays. Therefore, it is preferable to use a breathable sheet in which a photocatalyst is fixed to a mesh substrate having an opening ratio of 10 to 50%. If the aperture ratio is less than 10%, light permeability may be lowered, air permeability may be deteriorated, and pressure loss may be increased. If the aperture ratio exceeds 50%, the effect of the photocatalyst is reduced. In addition, ultraviolet rays leak to the outside and safety is a problem. In addition, since the photocatalyst itself is easily regenerated by heating, it is preferable to use a heat-resistant substrate.
Further, in terms of the function of adsorbing gaseous pollutants, it is preferable to use a substrate whose surface is made porous by acid treatment or the like.
[0010]
The germicidal lamp is preferably an ultraviolet lamp having a low wavelength of 254 nm. Such a germicidal lamp is preferable because it can increase the effective amount of light applied to the photocatalyst, enhances the photocatalytic action, and is ozone-free. In particular, in the biological field such as medical treatment, medicine and food, the combined use of germicidal lamps and photocatalysts is preferable because of its high sterilizing effect. Furthermore, in a clean room, it can cope with the removal of bacteria and microorganisms.
[0011]
In addition, as the antibacterial filter material, for example, various dust removal filter materials to which an inorganic antibacterial agent (metal such as silver or copper) or a natural product antibacterial agent (lytic enzyme, etc.) is added are used. As such a dust removing filter medium, any dust removing filter medium is used according to the desired cleanliness, such as a ULPA filter medium, a HEPA filter medium, a medium performance filter medium, and a coarse dust filter medium.
[0012]
Further, from the viewpoint of extending the life of the photocatalyst filter material, by providing the antibacterial filter material having the dust removing function upstream of the photocatalyst filter material, dust adhesion to the photocatalyst filter material surface is prevented, and removal by photocatalytic reaction is performed. It is preferable to do so since the microbial effect can be sufficiently obtained over a long period of time.
[0013]
The casing unit or casing is not particularly limited in material and configuration as long as it can fix at least a photocatalytic filter medium, an antibacterial filter medium, and a germicidal lamp, such as a galvalume steel plate and an aluminum rolled material. In addition, since it comprised as a casing unit, the arrangement | positioning and combination can be selected arbitrarily and it can assemble as a desired air purifying apparatus.
[0014]
【Example】
Hereinafter, the specific Example of the air purifying apparatus of this invention is described with a comparative example.
Example 1
FIG. 5 to FIG. 10 show the apparatus of this embodiment, and the antibacterial filter unit 11, the photocatalyst unit 12, the germicidal lamp unit 13, and the photocatalyst unit 12 are stacked in four stages in order from the bottom. They are integrated with each other by catch clips 14. In the figure, reference numeral 15 denotes a handle.
As the antibacterial filter unit 11, a medium-performance filter medium 11a in which a lytic enzyme (protamine and lysozyme), which is a natural product antibacterial agent, is immobilized by covalent bonding is hermetically accommodated in a casing 11b.
In the germicidal lamp unit 13 interposed between the photocatalytic units 12 and 12, four ultraviolet lamps having a wavelength of 254 nm are arranged in parallel at equal intervals as the light source 13a as shown in FIGS. Yes.
Each of the photocatalyst units 12 includes twelve catalyst holders 20 to be described in detail later. As shown in FIG. 5, the photocatalyst units 12 are arranged in four rows in the horizontal direction, three in the vertical direction in the drawing. For each row, guide rails 12a are provided on both the left and right sides, and the catalyst holder 20 is guided by the guide rails 12a and accommodated in the catalyst box 12 in a mechanically sealed state without using a sealant. Will be. When the catalyst holder 20 is accommodated in or removed from the catalyst box 12, the screws 12b fixing the upper guide rail 12a are loosened and a part of the guide rail 12a is removed. Easy to do.
[0015]
As shown in detail in FIGS. 9 and 10, the catalyst holder 20 is configured such that a part of the frame 20 a can be removed with screws 20 b, and a guide rail 20 c is provided in the frame 20 a, and anatase type Four 195 × 145 mm × 0.6 mm breathable sheet-like photocatalysts 20d obtained by supporting 5% by mass of a photocatalyst made of titanium oxide on a glass cloth having an aperture ratio of 25% made of E glass fiber having a fiber diameter of 9 μm. It is guided by the guide rail 20c and can be accommodated in the catalyst holder 20 in a mechanically sealed state without using a sealant.
[0016]
Thus, as shown in FIGS. 6 and 7, the antibacterial filter unit 11, the photocatalyst unit 12, the germicidal lamp unit 13, and the photocatalyst unit 12 are fastened with the catch clip 14 and stacked in four steps in order from the bottom. In this case, the air-permeable sheet-like photocatalyst body 20d is stacked and disposed in four layers in the vertical direction with the light source 13a interposed therebetween, and separated in the airflow passage direction.
[0017]
(Example 2)
As shown in FIG. 11, the arrangement of the air purifier of Example 1 is obtained by stacking a photocatalyst unit 12, a germicidal lamp unit 13, a photocatalyst unit 12, and an antibacterial filter unit 11 in four stages in order from the bottom. Was taken as Example 2.
[0018]
(Comparative Example 1)
A device using only the antibacterial fill unit of the air cleaning device of FIG.
[0019]
(Comparative Example 2)
A device using only the germicidal lamp unit of the air cleaning device of FIG.
[0020]
(Comparative Example 3)
The bactericidal lamp unit of the air purifier of FIG. 1 was replaced with a fluorescent lamp unit, and the antibacterial filter unit was removed as Comparative Example 3.
[0021]
(Comparative Example 4)
A comparative example 4 was obtained by removing the antibacterial filter unit of the air cleaning device of FIG.
[0022]
(Comparative Example 5)
Comparative Example 5 was obtained by replacing the germicidal lamp unit of Example 1 with a fluorescent lamp unit.
[0023]
(Comparative Example 6)
Comparative Example 6 was obtained by replacing the germicidal lamp unit of Example 2 with a fluorescent lamp unit.
[0024]
Next, the air purifiers of Examples 1 and 2 and Comparative Examples 1 to 6 thus obtained were tested and evaluated for the following characteristics.
(Disinfection effect)
(1) the above-described air cleaning apparatus, after mounting the air conditioning system of the laboratory of 600 meters 3, started operation.
(2) Using a portable airborne sampler MBS-1000 (Midori Safety Co., Ltd.), 1 m 3 was sampled at 100 liters / minute × 10 minutes immediately under each air purifier.
(3) A tryptosoy agar medium for bacteria (90 mm petri dish) was used as the collection medium, and the culture conditions were 35 ° C. and 48 hours.
(4) The concentration of airborne bacteria (cells / m 3 ) was determined from the number of colonies found per culture medium (number) and the sampling air amount (m 3 ) after culture, and the results are shown in Table 1.
(5) In addition, the floating microbe density | concentration in the indoor atmosphere before an air purifying apparatus driving | operation was about 50 CFU / m < 3 > (CFU: viable bacteria number of bacteria).
[0025]
[Table 1]
Figure 0004722350
[0026]
Thus, according to the air purification apparatus of Example 1, the excellent sterilization effect and the gas removal effect can be obtained, and when the antibacterial filter part is arranged upstream of the photocatalytic filter part as in Example 2. It was confirmed that an extremely excellent sterilizing effect was obtained and that it could be maintained for a long time.
[0027]
【The invention's effect】
Thus, according to the air purifying apparatus of the present invention, an air purifying apparatus capable of maintaining an excellent sterilizing effect over a long period of time in addition to the dust removing function and the gas removing function can be obtained.
[Brief description of the drawings]
Front view of a reference example of the present invention; FIG front view of another configuration example of a configuration of a front view [Figure 2] The present invention air cleaning device of the air cleaning device [3] The present invention air cleaning apparatus 4] Front view of still another reference example of the air cleaning apparatus of the present invention. FIG. 5 is a plan view of an embodiment of the air cleaning apparatus of the present invention. FIG. 6 is a front view of the air cleaning apparatus. 8 is an enlarged cross-sectional view of the main part of FIG. 7. FIG. 9 is a perspective view of a catalyst holder attached to the catalyst unit. FIG. 10 is a perspective view showing the disassembled state. Front view of the embodiment [Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Antibacterial filter unit 11a Antibacterial filter material 11b Casing 12 Photocatalyst unit 12 Catalyst box 12a Guide rail 12b Screw 13 Sterilization lamp unit 13a Sterilization lamp 14 Catch clip 15 Handle 20 Catalyst holder 20a Frame body 20b Screw 20c Guide rail 20d Breathable sheet-like photocatalyst Body 100a Photocatalyst filter material 100b Unit casing 100 Photocatalyst filter unit 110a Sterilization lamp 110b Unit casing 110 Sterilization lamp unit 120a Antibacterial filter material 120b Unit casing 120 Antibacterial filter unit 130 Catch clip 140 Casing

Claims (2)

光触媒機能を備えた光触媒濾過材をユニットケーシング内に組み込んだ光触媒フィルタユニットと、抗菌機能を備えた抗菌濾過材をユニットケーシング内に組み込んだ抗菌フィルタユニットと、殺菌灯をユニットケーシング内に組み込んだ殺菌灯ユニットを有し、これらユニットを連結自在としたことを特徴とする空気清浄装置。 A photocatalytic filter unit incorporating a photocatalytic filter material having a photocatalytic function in a unit casing, an antibacterial filter unit incorporating an antibacterial filter material having an antibacterial function in the unit casing, and a sterilization incorporating a germicidal lamp in the unit casing An air cleaning apparatus having a lamp unit, wherein these units can be connected . 前記光触媒フィルタユニットの上流側に前記抗菌フィルタユニットを配置したことを特徴とする請求項1記載の空気清浄装置。2. The air cleaning device according to claim 1 , wherein the antibacterial filter unit is disposed upstream of the photocatalytic filter unit .
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