JP2004236896A

JP2004236896A - Indoor air heating and sterilizing apparatus for hospital or the like

Info

Publication number: JP2004236896A
Application number: JP2003030179A
Authority: JP
Inventors: Yasushi Tomisaka; 泰富阪; Masateru Moriai; 政輝森合; Kenichi Nanba; 健一難波; Koichi Nakano; 浩一中野; Teruki Okuda; 輝樹奥田; Nobumasa Kataoka; 陳正片岡; Toshimitsu Sakae; 敏充栄
Original assignee: ADHOC KOBE KK
Current assignee: ADHOC KOBE KK
Priority date: 2003-02-07
Filing date: 2003-02-07
Publication date: 2004-08-26
Anticipated expiration: 2023-02-07
Also published as: JP4325785B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized air heating and sterilizing device capable of certainly killing various kinds of bacteria or the like probably floating in a hospital. <P>SOLUTION: This indoor air heating and sterilizing apparatus for the hospital or the like is constituted so as to kill pathogenic bacteria, a virus or the like floating in a room by sucking air in the room of the hospital or the like to heat the same by a heater. This apparatus is formed so as to heat the indoor air to 200°C or higher through a heat exchanger 5 and the heater 2 and has an air storage part 3 for holding the heated air with a temperature of 200°C or higher for about 0.1-36 sec. As the heater 2, an electric heater, a heater using town gas or the like as fuel or the like is used and inflow air is heated to 240-260°C by this heater and the air storage part 3 is set to a volume of 1-5 l to miniaturize this indoor air heating and sterilizing apparatus. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明が属する技術分野】
本発明は、空気浄化分野における病院等の室内空気加熱殺菌装置に関するものである。
【０００２】
【従来の技術】
近年、病院における院内感染が問題となり、病院内での空気浄化装置や空気殺菌装置等について研究、開発されている。
【０００３】
【先行技術文献】
このような細菌等の空気清浄装置について調査した結果、特開２００２−１１０８３号公報、特開２００１−２３８９４３号公報、特開２００１−２１８８２７号公報、特開平６−２３３８０６号公報などが検索された。
【０００４】
【発明が解決しようとする課題】
上記特開２００２−１１０８３号公報は、空気浄化装置に関して医療施設内等の空気中に浮遊する結核菌、その他の細菌、塵埃等を加熱、燃焼により減少させると共に死滅させることが提案されている。しかし、４００℃で燃焼させるので高温耐熱構造が必要であり、空気の加熱に要する熱量も多く、その熱を回収する熱交換手段も大きくなる。
【０００５】
また、この空気浄化装置では、熱交換手段の吸入空気路と排出空気路が短い分割円管を多孔板を挟んで積層してフランジ接合して形成している。そのため、吸入空気路と排出空気路の間の圧力差によって、また温度の上昇、下降が繰り返されるのでこれらの機械的接合部分が弛みやすく、汚染された空気が吸入空気路側から排出空気路側に漏洩するおそれがある。
【０００６】
また、特開２００１−２３８９４３号公報は、調湿した空気を断熱圧縮する加熱手段、圧力容器等を設けて、医療施設や食品加工施設などの内部の空気中に浮遊する細菌などを死滅させることが提案されている。しかし、主として外部空気の潜熱を殺菌処理に利用しているので、エネルギー効率を高くできるが、低温なので殺菌効果が乏しいと言える。
【０００７】
また、特開２００１−２１８８２７号公報では、化学薬剤や紫外線などの有害や汚染の心配がないように大気圧下における加熱水蒸気を利用した殺菌機能付き空調装置が提案されている。しかし、空調装置に取り込んだ空気に６０℃以上の常圧水蒸気を供給して加熱するものなので、前記のものと同様に殺菌時間が長くなり、装置が大きくなるとともに高温が得られないので殺菌効果が余りよくないものである。
さらに、特開平６−２３３８０６号公報では、オゾン発生式殺菌・脱臭空気清浄装置が提案され、病院等の特定室内における空気環境を改善することも知られている。
【０００８】
このように近年、殺菌可能な空気清浄装置についていろいろ提案されているが、室内、特に病院内にはいろいろな種類の細菌が浮遊している可能性があり、これらの細菌を確実に死滅させることができる装置が要望されている。
【０００９】
細菌等は、通常１００〜１８０℃の加熱で殺菌できるとして上記のように提案されているが、発明者らが考察した結果、細菌等の殺菌は、単に加熱するだけでなく、その殺菌温度と空気滞留時間との関係が重要な事項であることに着目し、殺菌効果の高い本発明に到達したものである。
【００１０】
【課題を解決するための手段】
本発明は、上記のような点に鑑みたもので、上記の課題を解決するために、病院等の室内の空気を吸入してこの空気を加熱して室内に浮遊する細菌等の病原菌、ウイルスなどを殺菌する病院等の室内空気加熱殺菌装置であって、室内空気を熱交換器、加熱器を介して２００℃以上に加熱可能に形成するとともに、この２００℃以上に加熱した加熱空気をほぼ０．１〜３６秒間滞留可能に空気貯留部を設けたことを特徴とする病院等の室内空気加熱殺菌装置を提供するにある。
【００１１】
【発明の実施の態様】
本発明の病院等の室内空気加熱殺菌装置は、病院等の室内の空気を吸入してこの空気を加熱して室内に浮遊する細菌等の病原菌、ウイルスなどを殺菌する病院等の室内空気加熱殺菌装置であって、室内空気を熱交換器、加熱器を介して２００℃以上に加熱可能に形成するとともに、この２００℃以上に加熱した加熱空気をほぼ０．１〜３６秒間滞留可能に空気貯留部を設けたことを特徴としている。
【００１２】
室内空気加熱殺菌装置１は、図１〜図３のように所定容量の電熱ヒーター、セラミックハニカムヒーターやスケルトンガスバーナ等の加熱器２の後流側に加熱した空気を一定時間滞留させる所定容量の空気貯留部３を近接、または一体的に配設するもので、ファン４等で熱交換器５を介して室内の空気を吸入して予熱し、加熱器２で所定の温度まで昇温し、空気貯留部３に一時滞留させ、熱交換器５を介して室温近傍まで冷却して室内に吐出可能な空気流通回路６を形成して、病院等の室内の空気を循環流通して室内の空気中に浮遊する細菌等の病原菌、ウィールスなどを有効に加熱殺菌できるようにしている。
【００１３】
加熱器２としては、装置を設置する室内容量に対して熱交換器５に対応して適宜に出力容量を決定することができるもので、所要の温度センサー等で熱交換器５を介して流通する空気を２００℃以上、好ましくは２００〜２４０℃、より好ましくは２６０〜３００℃や３００〜３５０℃、３５０℃以上〜４００℃以下に温調制御器等を介して加熱制御するようにできる。そして、微生物殺菌理論にもとづいて微生物、細菌の生存割合、加熱時間、殺菌減少時間Ｄ、加熱温度の関係を図２（ａ）、（ｂ）に、加熱殺菌について試算した結果について表１に示し、細菌の加熱温度に対する殺菌時間を６Ｄ〜１２Ｄの関係で求めることができるようにした。
【００１４】
【表１】

【００１５】
菌種や装置の構造、その他によって相違があるが、表１のように通常の殺菌時間６Ｄとし、加熱温度が２００〜２６０℃の範囲では３６〜０．０３６秒位とほぼ推定できるもので、通常の１ｍ^３／分の吸込・吐出量では上記空気流通回路６中での空気貯留部３として６００〜１リットル位の滞留空間容量として実用的に対処することができる。場合により、殺菌時間１２Ｄとして対処することも可能である。
【００１６】
たとえば、加熱器２の加熱殺菌温度を２００〜２４０℃とすれば、空気貯留部３の大きさを１０〜６００リットル容量で、ほぼ２００リットル容量位で実施できる。また、加熱器２の加熱殺菌温度を２４０〜２６０℃とすれば、空気貯留部３の大きさを０．５〜１０リットル容量で、ほぼ１〜５リットル容量とでき、小型化できて好ましい。加熱温度をさらに２６０〜３００℃にするとさらに１リットル以下の小空間にできて好ましく、また３００〜３５０℃や３５０℃〜４００℃とすることによって一層小空間にでき、流入した予熱空気が加熱器２部を通過する状態で殺菌できる状態にできる。しかし、４００℃以上の高温にしても断熱構造が複雑となり、それ程の加熱殺菌効果が上がらない。
【００１７】
このような加熱器２と空気貯留部３はそれぞれ十分に断熱状態とされ、耐熱性配管等の断熱被覆した空気流通回路６として、高温側端から低温側端までそれぞれ一本の円筒管とした多重の円筒管で構成されるコリンズ型や、高温側端から低温側端までそれぞれ一枚の仕切り板で仕切られたプレートフィン型等の空気の漏洩のおそれのない熱交換器２に配設して殺菌処理するものであり、図３のように熱交換器５に内装して排熱回収式の熱交換器５と一体化するようにできる。
【００１８】
熱交換器５としては、たとえばプレートフィン型のもので、図３、図４のように空気流入路７と空気流出路８を機械的接合のない仕切り板１２で並行状またはサンドイッチ状に挟み込み状態として渦巻き状やジグザグ状に所定厚さの断熱シート等の断熱材９を介挿して空気の漏入、漏出のおそれのない一体構造に形成したものが、機械的接合部がなくて細菌等が漏出しなくて安心でき、かつ熱効率を高められ、その結果小型化できて好ましいものである。
【００１９】
そして、図３のように上記した熱交換器５の中央部に所要の空間部１０を設けて加熱器２を配設し、加熱した空気の空気貯留部３を上記したように加熱温度に対応した容量とし、整流板１１などの混合防止手段を適宜に設けて加熱した空気の滞留時間にばらつきが出ないようにするのが好ましい。
【００２０】
なお、上記した図３の熱交換器５は、図３（ｂ）のように銅板やステンレス鋼板等の仕切り板１２を設けてフィン１３を細密に配設した所定幅の気密構造のものとすることができ、設置空間に対応して所要の幅とすることができる。その際、一定幅のモジュールの熱交換器５を溶接等で気密的に接続して所定幅のものとして対処するようにするのが好ましい。
【００２１】
また、この熱交換器５の空気流出路８の吐出口側にファン４を配設し、室内の空気を空気流入路７から吸入して中央の加熱器２に送給して加熱し、空気貯留部３に所定時間滞留させて空気流出路８から吐出させ、室内に戻すようにできる。上記ファン４は、吸入口側に配設することもできる。
【００２２】
熱交換器５に流入する空気は、空気流出路８を挟むように並設した空気流入路７を通る間に、空気流出路８を通って排出される空気の排熱によって加熱され、また殺菌浄化された空気は逆に空気流入路７を通って冷却されて吐出口１４から室内に吐出されるものである。
【００２３】
なお、図１に示すように室内への吐出口側にクリーンルームなどで使用されているＨＥＰＡ（ヘパ）フィルターのような高性能フィルター１５を配設し、加熱殺菌して死滅した細菌等を捕捉して室内に飛散しないようにすることもできる。
【００２４】
また、図５のように熱交換器５内に加熱器２を一定間隔で複数個多段状に配設するとともに、その前後に整流板１１や邪魔板等を配設して空気を確実に加熱器２部に絞って衝突状態とし、加熱殺菌効果を高めるようにするなど適宜の手段が実施できる。
【００２５】
また、図６のように加熱器２に都市ガス等を燃料とするガスバーナー式の加熱手段を利用することもでき、電気式、ガス式のように直接加熱式とするのが好ましい。
【００２６】
さらに、図７のように空気流通回路６に公知のオゾナイザー等の殺菌装置１６やマイナスイオン発生器等の空気浄化装置を配設して、上記した加熱器２による加熱殺菌と併せて雑菌処理したり、空調処理するようにもできる。なお、オゾナイザーを配設するときには、図７のようにオゾン除去器１７を併設するのが脱臭防止等から好ましく、オゾナイザーはオゾン除去器１７の直前に配設するのが、装置等の酸化損傷を防止できることから好ましい。
【００２７】
このような室内空気加熱殺菌装置は、病院、老人介護施設での設置が好ましいが、学校、ホテル、百貨店、列車、航空機、船、自動車、スーパーマーケット、ビルディング、一般家庭等においても設置できるものであり、細菌等の汚染が生じたり、心配されるところに適用可能であり、設置する広さにより複数台を設置することもでき、加熱温度、殺菌時間については、これらの設置環境等により本発明の趣旨にもとづいて適宜に判断して実効をはかるようにできるものである。
【００２８】
【実施例】
図１は、本発明の一例を示す原理説明図で、図３（ａ）、（ｂ）はその一実施例を示すものである。室内空気加熱殺菌装置１は、図３（ａ）のように装置本体１８の下部にキャリアー１９を取着して移動可能とし、使用場所を順次変更したりして使用することができるようにしたものである。必要により、据え置き式、壁取り付け式、天井固定式等の適宜の方式とすることもできる。
【００２９】
室内空気加熱殺菌装置１は、図３（ａ）、（ｂ）のように所定寸法の箱状とした熱交換器５に一体的としたものである。特に、熱交換器５の空気流入路７と空気流出路８の隣接した仕切り板１２の両面に多数のフィンを溶接やろう付けで接合して管路を形成し、サンドイッチ状に挟み込み状態として並行状に渦巻き状に所定厚さの断熱シート等の断熱材９を介挿して一体構造に形成したもので、そのほぼ中央部分に十分に断熱構造とした電熱ヒーターの加熱器２を配設し、そのまわりの特に流出側に邪魔板２０を適宜に配設して一定時間加熱した空気を滞留可能に十分な断熱構造として所定容量の空気貯留部３としている。
【００３０】
そして、上部に配設したファン４によって室内の空気を空気流入路７に吸い込んで渦巻き状の空気流出回路６を通って中央部の加熱器２で加熱し、上記空気貯留部３で滞留させながら順次渦巻き状の空気流出路８の空気流通回路６を通って吐出口１４から室内へ還流していくようにしている。
【００３１】
空気加熱殺菌装置１の容量は、室内の大きさに対応して決定できるもので、電気ヒーターの加熱器２を２００〜４００℃の温度制御とし、２００〜２４０℃、２４０〜２６０℃、２６０〜３００℃、３００〜３５０℃、３５０〜４００℃といった温度範囲に可変設置するようにできる。また、空気貯留部３をほぼ１リットルの滞留空間、装置本体として８００ｍｍ×６００ｍｍ×４００ｍｍ位の小型の箱状のものとできる。
【００３２】
図４は、本発明の他の実施例のもので、本実施例では熱交換器５を図のように空気流入路７と空気流出路８をサンドイッチ状に挟み込み状態としてジグザグ状に所定厚さの断熱シート等の断熱材９を介挿して一体構造に形成したもので、その一側部に加熱器２を配設して空気貯留部３をやや大きな空間容量のものとして設けたものである。
【００３３】
このように熱交換器５をプレートフィン型として空気流入路７と空気流出路８を板状の仕切り板１２で空気の漏入、漏出のおそれのない一体構造のものに形成しているので、機械的接合部分が全くなくて弛みが生じず、汚染された空気が吸入空気路側から排出空気路側に漏洩するおそれが全くない。そして、空気流通回路６を渦巻き状やジグザグ状等に形成し、空気流入路７と空気流出路８をサンドイッチ状に挟み込み状態と配設することで熱交換効率を最高に発揮するようにでき、乾式加熱殺菌処理の実効がはかれる。なお、温度管理は、空気貯留部３や空気流出路８の出側部などに温度センサーを配設して温調制御器を介して電気ヒーター加熱器２を制御して所要の加熱殺菌処理を行うことができる。
【００３４】
図５は、本発明のさらに他の実施例で、上記のような熱交換器５内に加熱器２を一定間隔で複数個多段状に配設するとともに、その前後に整流板１１や邪魔板を配設したものである。本実施例では予熱された空気を絞って確実に加熱器２に衝突状態として加熱殺菌効果を高めるようにできる。
【００３５】
図６は、本発明のさらに他の実施例で、加熱器２を都市ガス等を燃料とするガスバーナー加熱としたもので、図３〜図５のように空気加熱殺菌装置１を形成することができる。
【００３６】
また、図７のように上記した装置にオゾナイザーの殺菌装置１６を直列状に配設し、オゾン除去器１７を接続して、加熱殺菌とオゾン殺菌で細菌等を殺菌するようにもできる。
【００３７】
【発明の効果】
以上のように本発明にあっては、病院等の室内の空気を吸入してこの空気を加熱して室内に浮遊する細菌等の病原菌、ウイルスなどを殺菌する病院等の室内空気加熱殺菌装置であって、室内空気を熱交換器、加熱器を介して２００℃以上に加熱可能に形成するとともに、この２００℃以上に加熱した加熱空気をほぼ０．１〜３６秒間滞留可能に空気貯留部を形成することによって、病院内等での空気中に浮遊する細菌等の病原菌、ウィールスなどを有効に加熱殺菌して清浄化することができる。
【００３８】
そしてまた、加熱器を電熱式加熱器や都市ガス等を燃料とする加熱器等として、吸入した空気を２４０〜２６０℃の温度に加熱するように形成するとともに、１〜５リットル容量の空気貯留部を配設することによって、空気貯留部を１〜５リットル滞留空間といった小型化できて、空気中に浮遊する細菌等の病原菌、ウィールスなどを有効に加熱殺菌することができる。
【００３９】
また、熱交換器を、空気の漏洩のおそれのない完全仕切りの排熱回収構造のものとすることによって、省エネルギーがはかれるとともに、機械的接合部分が全くなくて弛みが生じず、汚染された空気が吸入空気路側から排出空気路側に漏洩するおそれが全くなく、加熱殺菌処理を安定して行うことができる。
【００４０】
特に、空気流入路と空気流出路を空気の漏洩のおそれのない完全仕切り構造の管路としてこれらを並行状に、渦巻き状やジグザグ状に形成し、空気流入路から流入する空気を所定の温度に予熱した後、加熱器によって所定の温度まで加熱して、空気貯留部に一時滞留させ、空気流入路から室温近傍まで冷却して吐出することによって、熱交換率を高められ、加熱器の加熱効率を十分に発揮するようにでき、上記した乾式加熱殺菌処理の実効がはかれる。
【図面の簡単な説明】
【図１】本発明の一実施例の原理説明用図、
【図２】同上の細菌生存曲線図（ａ）と熱耐性曲線図（ｂ）、
【図３】同上の一実施例の装置の一部省略した側断面図（ａ）と部分断面図（ｂ）、
【図４】同上の他の実施例の装置の一部省略した側断面図、
【図５】同上のさらに他の実施例の装置の一部省略した側断面図、
【図６】同上のさらに他の実施例の原理説明用図、
【図７】同上のさらに他の実施例の原理説明用図。
【符号の説明】
１…室内空気加熱殺菌装置２…加熱器３…空気貯留部
４…フアン５…熱交換器６…空気流通回路
７…空気流入路８…空気流出路[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an indoor air heating and sterilizing apparatus for hospitals and the like in the field of air purification.
[0002]
[Prior art]
In recent years, nosocomial infection in hospitals has become a problem, and air purifying devices and air sterilizing devices in hospitals have been studied and developed.
[0003]
[Prior art documents]
As a result of investigating such an air cleaning device for bacteria and the like, JP-A-2002-11083, JP-A-2001-238943, JP-A-2001-218827, JP-A-6-233806, and the like were searched. .
[0004]
[Problems to be solved by the invention]
The above-mentioned Japanese Patent Application Laid-Open No. 2002-11083 proposes that an air purifying device reduces and kills tuberculosis bacteria, other bacteria, dust and the like floating in the air in a medical facility or the like by heating and burning. However, since combustion is performed at 400 ° C., a high-temperature heat-resistant structure is required, the amount of heat required for heating the air is large, and the heat exchange means for recovering the heat becomes large.
[0005]
Further, in this air purification device, the intake air passage and the discharge air passage of the heat exchange means are formed by stacking short circular pipes sandwiching a perforated plate therebetween and by flange joining. Due to the pressure difference between the intake air passage and the discharge air passage, the temperature rises and falls repeatedly, so that these mechanical joints tend to loosen, and contaminated air leaks from the intake air passage side to the discharge air passage side. There is a possibility that.
[0006]
Japanese Patent Application Laid-Open No. 2001-238943 discloses a method of killing bacteria floating in the air inside medical facilities, food processing facilities, and the like by providing a heating means, a pressure vessel, and the like for adiabatically compressing conditioned air. Has been proposed. However, since the latent heat of the external air is mainly used for the sterilization treatment, energy efficiency can be increased, but the sterilization effect is poor because of the low temperature.
[0007]
In addition, Japanese Patent Application Laid-Open No. 2001-218827 proposes an air conditioner with a sterilizing function using heated steam under atmospheric pressure so that there is no risk of harm or contamination by chemical agents or ultraviolet rays. However, since the air taken into the air conditioner is supplied with normal-pressure steam of 60 ° C. or more and heated, the sterilization time becomes longer as in the case of the above, and the equipment becomes larger and the high temperature cannot be obtained. Is not very good.
Further, Japanese Patent Application Laid-Open No. Hei 6-233806 proposes an ozone generating type sterilizing / deodorizing air purifying apparatus, and it is also known to improve an air environment in a specific room such as a hospital.
[0008]
In recent years, various types of air purifying devices that can be sterilized have been proposed in recent years. However, various types of bacteria may be floating indoors, especially in hospitals, and it is necessary to surely kill these bacteria. There is a demand for a device capable of performing the above.
[0009]
Bacteria and the like have been proposed as described above, which can be usually sterilized by heating at 100 to 180 ° C. However, as a result of consideration by the present inventors, sterilization of bacteria and the like is not merely performed by heating, but by sterilizing temperature and the like. Focusing on the fact that the relationship with the air residence time is an important matter, the present invention has achieved the present invention having a high sterilizing effect.
[0010]
[Means for Solving the Problems]
The present invention has been made in view of the above points, and in order to solve the above-mentioned problem, inhaling air in a room such as a hospital, heating the air, and causing pathogens such as bacteria floating in the room and viruses. This is an indoor air heating and sterilizing apparatus for sterilizing hospitals and the like, in which indoor air can be heated to 200 ° C. or higher via a heat exchanger and a heater, and the heated air heated to 200 ° C. or higher is almost completely cooled. An object of the present invention is to provide an indoor air heating and sterilizing apparatus for hospitals and the like, characterized in that an air storage section is provided so as to be able to stay for 0.1 to 36 seconds.
[0011]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
INDUSTRIAL APPLICABILITY The indoor air heating sterilizer of a hospital or the like of the present invention inhales indoor air of a hospital or the like and heats the air to sterilize pathogens such as bacteria and viruses floating in the room by heating the air. An apparatus for forming indoor air capable of being heated to 200 ° C. or higher through a heat exchanger and a heater, and for storing the heated air heated to 200 ° C. or higher for approximately 0.1 to 36 seconds. It is characterized by having a section.
[0012]
As shown in FIGS. 1 to 3, the indoor air heating / sterilizing apparatus 1 has a predetermined volume of air for retaining the heated air on the downstream side of the heater 2 such as an electric heater, a ceramic honeycomb heater or a skeleton gas burner for a predetermined time. The storage unit 3 is disposed close to or integrally with the storage unit 3. The storage unit 3 is preheated by inhaling room air through a heat exchanger 5 with a fan 4 or the like, and is heated to a predetermined temperature by the heater 2, An air circulation circuit 6 that is temporarily stored in the storage unit 3, cooled to near room temperature through the heat exchanger 5, and can be discharged into the room is formed, and circulates and circulates room air in a hospital or the like to circulate air therein. Pathogens such as bacteria floating on the soil, viruses, etc. can be effectively heat-sterilized.
[0013]
The heater 2 can appropriately determine the output capacity corresponding to the heat exchanger 5 with respect to the indoor capacity in which the apparatus is installed, and is circulated through the heat exchanger 5 with a required temperature sensor or the like. The temperature of the air to be heated can be controlled to 200 ° C. or higher, preferably 200 to 240 ° C., more preferably 260 to 300 ° C. or 300 to 350 ° C., or 350 to 400 ° C. via a temperature control controller or the like. 2 (a) and 2 (b) show the relationship between the survival rate of microorganisms and bacteria, the heating time, the sterilization reduction time D, and the heating temperature based on the microbial sterilization theory. The sterilization time with respect to the heating temperature of the bacteria can be determined in a relationship of 6D to 12D.
[0014]
[Table 1]

[0015]
Although there is a difference depending on the type of bacteria and the structure of the device, etc., it is assumed that the normal sterilization time is 6D as shown in Table 1 and that the heating temperature is approximately 36 to 0.036 seconds in the range of 200 to 260 ° C. With a normal suction / discharge rate of 1 m ³ / min, the air storage section 3 in the air circulation circuit 6 can practically cope with a retention space capacity of about 600 to 1 liter. In some cases, it is possible to deal with the sterilization time 12D.
[0016]
For example, if the heating sterilization temperature of the heater 2 is set to 200 to 240 ° C., the size of the air storage section 3 can be set to 10 to 600 liters, which is approximately 200 liters. Further, if the heating sterilization temperature of the heater 2 is set to 240 to 260 ° C., the size of the air storage unit 3 can be set to approximately 0.5 to 10 liters, approximately 1 to 5 liters, and the size can be reduced, which is preferable. When the heating temperature is further increased to 260 to 300 ° C., a small space of 1 liter or less can be formed, which is preferable. Further, when the heating temperature is set to 300 to 350 ° C. or 350 ° C. to 400 ° C., the space can be further reduced. It can be sterilized while passing through two parts. However, even at a high temperature of 400 ° C. or more, the heat insulation structure becomes complicated, and the heat sterilization effect is not so high.
[0017]
The heater 2 and the air storage unit 3 are sufficiently insulated from each other, and each of the heaters 2 and the air storage unit 3 is a single cylindrical tube from the high-temperature side end to the low-temperature side end as an air circulation circuit 6 covered with heat insulation such as a heat-resistant pipe. A heat exchanger 2 that does not leak air, such as a Collins type configured with multiple cylindrical tubes or a plate fin type separated from a high-temperature side end to a low-temperature side end by a single partition plate. The heat exchanger 5 is sterilized, and as shown in FIG. 3, the heat exchanger 5 can be housed in the heat exchanger 5 and integrated with the heat exchanger 5 of a waste heat recovery type.
[0018]
The heat exchanger 5 is, for example, a plate fin type, in which the air inflow path 7 and the air outflow path 8 are sandwiched in parallel or in a sandwich shape by a partition plate 12 having no mechanical connection as shown in FIGS. In a spiral or zigzag form, a heat insulating material 9 such as a heat insulating sheet having a predetermined thickness is interposed to form an integral structure without air leakage or leakage. This is preferable because it can be relieved without leakage and can increase the thermal efficiency, and as a result, can be reduced in size.
[0019]
Then, as shown in FIG. 3, a required space portion 10 is provided in the center of the above-described heat exchanger 5 and the heater 2 is provided, and the air storage portion 3 of the heated air is adjusted to the heating temperature as described above. It is preferable that a mixing prevention means such as the rectifying plate 11 is appropriately provided to prevent variation in the residence time of the heated air.
[0020]
The heat exchanger 5 shown in FIG. 3 has an airtight structure having a predetermined width in which a partition plate 12 such as a copper plate or a stainless steel plate is provided and fins 13 are finely arranged as shown in FIG. 3B. And the required width can be obtained according to the installation space. At this time, it is preferable that the heat exchanger 5 of a module having a fixed width is air-tightly connected by welding or the like so that the heat exchanger 5 has a predetermined width.
[0021]
Further, a fan 4 is disposed on the discharge port side of the air outflow passage 8 of the heat exchanger 5 to draw indoor air from the air inflow passage 7 and supply it to the central heater 2 for heating. The air can be retained in the storage unit 3 for a predetermined time, discharged from the air outflow passage 8, and returned to the room. The fan 4 can be arranged on the suction port side.
[0022]
The air flowing into the heat exchanger 5 is heated by the exhaust heat of the air discharged through the air outflow passage 8 while passing through the air inflow passages 7 arranged so as to sandwich the air outflow passage 8, and is sterilized. On the contrary, the purified air is cooled through the air inflow path 7 and is discharged from the discharge port 14 into the room.
[0023]
As shown in FIG. 1, a high-performance filter 15 such as a HEPA (hepa) filter used in a clean room or the like is disposed on the side of the discharge port into the room to capture bacteria that have been killed by heat sterilization. To prevent them from flying indoors.
[0024]
Further, as shown in FIG. 5, a plurality of heaters 2 are arranged in the heat exchanger 5 in a multi-stage manner at regular intervals, and a rectifying plate 11 and a baffle plate are arranged before and after the heaters 2 to reliably heat the air. Appropriate means can be implemented, such as squeezing the vessel 2 into a collision state to enhance the heat sterilization effect.
[0025]
Further, as shown in FIG. 6, a gas burner type heating means using city gas or the like as a fuel can be used for the heater 2, and it is preferable to use a direct heating type such as an electric type or a gas type.
[0026]
Further, as shown in FIG. 7, a disinfecting device 16 such as a known ozonizer and an air purifying device such as a negative ion generator are provided in the air circulation circuit 6, and various germs are treated together with the heat disinfection by the heater 2 described above. Or air conditioning. When an ozonizer is provided, it is preferable to provide an ozone remover 17 as shown in FIG. 7 in order to prevent deodorization and the like, and the ozonizer is provided immediately before the ozone remover 17 to prevent oxidative damage of equipment and the like. It is preferable because it can be prevented.
[0027]
Such an indoor air heating and sterilizing apparatus is preferably installed in hospitals and nursing homes, but can also be installed in schools, hotels, department stores, trains, aircraft, ships, cars, supermarkets, buildings, general households, and the like. It can be applied to places where there is concern or contamination of bacteria, etc., and it is also possible to install a plurality of units depending on the size of the installation. It is possible to make an appropriate judgment based on the purpose and to achieve the effect.
[0028]
【Example】
FIG. 1 is an explanatory view of the principle showing an example of the present invention, and FIGS. 3 (a) and 3 (b) show an embodiment thereof. As shown in FIG. 3 (a), the indoor air heating sterilizer 1 can be moved by attaching a carrier 19 to a lower portion of the apparatus main body 18 so that the use place can be changed sequentially. Things. If necessary, an appropriate system such as a stationary system, a wall-mounted system, and a ceiling-fixed system may be used.
[0029]
The indoor air heating and sterilizing apparatus 1 is integrated with a box-shaped heat exchanger 5 having a predetermined size as shown in FIGS. 3 (a) and 3 (b). In particular, a number of fins are joined by welding or brazing to both sides of the partition plate 12 adjacent to the air inflow path 7 and the air outflow path 8 of the heat exchanger 5 to form a conduit, and are sandwiched in a sandwich shape to be parallel. A heat insulating material 9 such as a heat insulating sheet having a predetermined thickness is inserted in a spiral shape to form an integral structure, and a heater 2 of an electric heater having a sufficiently heat insulating structure is disposed at a substantially central portion thereof. The baffle plate 20 is appropriately disposed around the air flow, particularly on the outflow side, and the air storage section 3 has a predetermined capacity as a heat insulating structure sufficient to allow the air heated for a predetermined time to stay therein.
[0030]
Then, the indoor air is sucked into the air inflow path 7 by the fan 4 disposed at the upper part, passes through the spiral air outflow circuit 6, is heated by the central heater 2, and stays in the air storage section 3. The air is returned from the discharge port 14 to the room through the air circulation circuit 6 of the spiral air outflow path 8 in order.
[0031]
The capacity of the air heating sterilizer 1 can be determined according to the size of the room, and the heater 2 of the electric heater is controlled at a temperature of 200 to 400 ° C., and 200 to 240 ° C., 240 to 260 ° C., 260 to 260 ° C. It can be variably installed in a temperature range of 300 ° C., 300 to 350 ° C., 350 to 400 ° C. In addition, the air storage section 3 can be formed as a small box-shaped device having a retention space of about 1 liter and a device body of about 800 mm × 600 mm × 400 mm.
[0032]
FIG. 4 shows another embodiment of the present invention. In this embodiment, the heat exchanger 5 is sandwiched between the air inflow path 7 and the air outflow path 8 as shown in FIG. And a heat insulating material 9 such as a heat insulating sheet is interposed therebetween to form an integral structure. A heater 2 is disposed on one side of the heat insulating material 9 and an air storage portion 3 is provided with a slightly large space capacity. .
[0033]
As described above, since the heat exchanger 5 is a plate fin type, the air inflow path 7 and the air outflow path 8 are formed by the plate-shaped partition plate 12 into an integral structure having no risk of air leakage and leakage. There is no mechanical joint and no slack occurs, and there is no possibility that the contaminated air leaks from the intake air passage to the discharge air passage. The air circulation circuit 6 is formed in a spiral shape or a zigzag shape, and the air inflow path 7 and the air outflow path 8 are sandwiched and arranged so that the heat exchange efficiency can be maximized. Effectiveness of dry heat sterilization is achieved. The temperature is controlled by arranging a temperature sensor in the air storage section 3 or the outlet side of the air outflow passage 8 and controlling the electric heater heater 2 via a temperature control controller to perform a required heat sterilization process. It can be carried out.
[0034]
FIG. 5 shows still another embodiment of the present invention, in which a plurality of heaters 2 are arranged in a plurality of stages at regular intervals in the heat exchanger 5 as described above, and a rectifying plate 11 and a baffle plate Is arranged. In the present embodiment, the preheated air can be squeezed to ensure a collision state with the heater 2 to enhance the heat sterilization effect.
[0035]
FIG. 6 shows still another embodiment of the present invention, in which the heater 2 is a gas burner heating using city gas or the like as a fuel, and the air heating sterilizer 1 is formed as shown in FIGS. Can be.
[0036]
As shown in FIG. 7, an ozonizer sterilizer 16 may be arranged in series with the above-described apparatus, and an ozone remover 17 may be connected to sterilize bacteria and the like by heat sterilization and ozone sterilization.
[0037]
【The invention's effect】
As described above, according to the present invention, an indoor air heating and sterilizing apparatus such as a hospital that inhales air in a room such as a hospital and heats the air to sterilize pathogens such as bacteria and viruses floating in the room. The air storage section is formed so that the indoor air can be heated to 200 ° C. or higher through a heat exchanger and a heater, and the heated air heated to 200 ° C. or higher can be retained for approximately 0.1 to 36 seconds. By the formation, pathogens such as bacteria floating in the air in hospitals and the like, viruses and the like can be effectively heat-sterilized and purified.
[0038]
Further, the heater is formed as an electric heater or a heater using city gas or the like as a fuel so as to heat the sucked air to a temperature of 240 to 260 ° C., and store 1 to 5 liters of air. By arranging the section, the air storage section can be reduced in size such as a 1 to 5 liter retention space, and pathogens such as bacteria floating in the air, and viruses can be effectively heat-sterilized.
[0039]
In addition, by using a heat exchanger having a completely partitioned exhaust heat recovery structure that does not cause air leakage, energy can be saved, and there is no mechanical joint, no loosening occurs, and contaminated air is not generated. Does not leak from the intake air passage side to the discharge air passage side, and the heat sterilization treatment can be stably performed.
[0040]
In particular, the air inflow path and the air outflow path are formed in parallel, spiral or zigzag form as a completely partitioned structure pipe having no risk of air leakage, and the air flowing from the air inflow path has a predetermined temperature. After being preheated to a predetermined temperature, it is heated to a predetermined temperature by a heater, temporarily stored in an air storage unit, cooled to near room temperature from an air inflow path, and discharged, so that the heat exchange rate is increased, and the heater is heated. The efficiency can be sufficiently exhibited, and the above-mentioned dry heat sterilization treatment can be performed effectively.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining the principle of one embodiment of the present invention,
FIG. 2 is a graph showing bacterial survival curves (a) and thermotolerance curves (b),
FIG. 3 is a side sectional view (a) and a partial sectional view (b) of the device of the embodiment, with a part omitted;
FIG. 4 is a side cross-sectional view of the device of another embodiment of the above, with a part omitted;
FIG. 5 is a side cross-sectional view of a device according to still another embodiment of the above, with a part omitted;
FIG. 6 is a view for explaining the principle of still another embodiment of the above,
FIG. 7 is a view for explaining the principle of still another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Indoor air heating sterilization device 2 ... Heater 3 ... Air storage part 4 ... Fan 5 ... Heat exchanger 6 ... Air circulation circuit 7 ... Air inflow path 8 ... Air outflow path

Claims

An indoor air heating and sterilizing apparatus for hospitals and the like that inhales air in a room such as a hospital and heats the air to sterilize pathogens such as bacteria floating in the room and viruses.
The indoor air is formed so that it can be heated to 200 ° C. or higher through a heat exchanger and a heater, and an air storage section is provided so that the heated air heated to 200 ° C. or higher can be retained for approximately 0.1 to 36 seconds. An indoor air heating sterilizer for hospitals and the like, characterized by the following.

The heater is formed as an electric heater or a heater using city gas or the like as a fuel, and is formed so as to heat the inhaled air to a temperature of 240 to 260 ° C. The indoor air heating / sterilizing apparatus for a hospital or the like according to claim 1 provided.

3. The indoor air heating / sterilizing apparatus for a hospital or the like according to claim 1 or 2, wherein the heat exchanger has a completely partitioned exhaust heat recovery structure without fear of air leakage.

The air inflow path and the air outflow path are formed in parallel and in a spiral or zigzag shape as a completely partitioned pipe with no risk of air leakage, and the air flowing from the air inflow path is preheated to a predetermined temperature. The hospital according to any one of claims 1 to 3, wherein the hospital is heated to a predetermined temperature by a heater, temporarily stored in an air storage section, cooled from an air inflow passage to near room temperature, and discharged. And indoor air heating and sterilizing equipment.