JP3719368B2

JP3719368B2 - Blower

Info

Publication number: JP3719368B2
Application number: JP2000122239A
Authority: JP
Inventors: 靖之横手; 義巳岩村; 茂己小林; 秀明柏原
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2000-04-24
Filing date: 2000-04-24
Publication date: 2005-11-24
Anticipated expiration: 2020-04-24
Also published as: JP2001304192A

Description

【０００１】
【発明の属する技術分野】
この発明は、建築物の開放された出入口に設置され、主として冷暖房時の建物内外の断熱を行うエアーカーテン等の技術に使用可能な送風機に関するもので、また、空気力学・騒音特性を向上させたプロペラファンを応用した小型で、非常に吹出し風速が早く、風量も多い送風機の技術に関するものである。
【０００２】
【従来の技術】
従来のこの種の送風機は商品名エアーカーテンと呼ばれ、ラインフローファンと呼ばれる横断流羽根で円形で軸方向に長い羽根を用い、吸込口と直角方向の位置に設けられた吹出口に送風するものである。
【０００３】
図１７は特開平６−３１３６０３号に示された従来の横断流羽根を用いた送風機の取付け状態図で回転軸方向から見た側断面図である。家屋の開放された出入口１０６の上部の出入口の上部壁面１０５の室内側に設置された送風機本体１０１は、その設置面側１０１ａと反対の側面に吸込口１０３と下面に吹出口１０４を有している。また、送風機本体１０１内には、風を吸込口１０３から吹出口１０４に送る横断流羽根１１３とこれを回転駆動する駆動モーター１１４が、横断流羽根１１３の外周部には風の流れを導くファンケーシング１１５が設けられている。さらに、吹出口１０４には吹出し風の方向を調整する複数枚の風向調整板１１６が上端部を支点として回動自在に支えられている。上記のように構成され、駆動モーター１１４の回転により横断流羽根１１３が回転すると、吸込口１０３から吸込まれた空気は横断流羽根１１３内を通過し、ファンケーシング１１５により吹出口１０４へと送風され、開放された出入口１０６の上方より下方へエアーカーテン流を形成するものである。なお、本図の取付け状態においては、天井面１０７と送風機本体１０１の吹出口１０４の反対面である送風機本体上面１０１ｂの間には吸込空間Ａ１１０があるが、送風機本体上面１０１ｂを天井面１０７に密着させ吸込空間Ａ１１０をなくした状態でも吸込口１０３は塞がれることがないため、送風作用に影響なく取付け可能である。
【０００４】
横断流羽根では、ファンケーシングの吸込口１０３と吹出口１０４は回転軸で対象位置となっており、横断流羽根１１３には吸込み流れと吹出し流れの両方が流れ、すなわちほぼ１８０°回転した時点で吸込み流れは吹出し流れとなり、結局横断流羽根の全周の約１／２しか仕事をしていないためファン効率がプロペラファンなどと比べ低く、本体１０１の外形寸法は横断流羽根の羽根外径寸法が小さいにも係わらずファンケーシングを有するためさほど小さくならない。ファンケーシングの吹出口１０４は横断流羽根の吹き出しのため幅寸法が少なく軸方向に長い形状のため、吹出し流れは風速が早いが風量は少ない流れとなる。このような風の流れにより、吹出し口の真下に人がいた場合には不快に感じ、さらには風量を確保するため、吹出し風速はますます高くなり床面部分でも風速が高く、床面の埃を舞い上げたり、跳ね返りの風が他の人に当たる等の不快な状態が発生する。
【０００５】
上記の問題を解決するための送風機としては、特開平６−３１３６０３号に記載された送風機がある。この送風機はプロペラファンを複数個用い、その送風部を複数個並列に設けたものである。上記の送風機はプロペラファンを使用しているため、低騒音でファン効率が高いという特徴があるものの風の流れ方向すなわち吸込方向と吹出方向が軸方向であり、従来の横断流羽根タイプの直角方向ではない。
【０００６】
図１８は従来のプロペラファン式の送風機の製品構成を表わす側断面図で、３５は送風機１０１の外筐、１０３はこの外筐の上部に設けられた吸込口で、その吸込口には上端部が丸み３４を有した円筒形のベルマウス３０を樹脂の成形品で形成している。３６はモーター取付板で、回転軸にプロペラファン２が羽根固定ナット４２により固定された駆動モーター１を上記ベルマウス３０間に位置させるように固定している。なお、これらの駆動モーター１、プロペラファン２及びベルマウス３０からなる送風部は等間隔にて外筐３５に複数個並列に設けられている。１０４は外筐３５の下部に設けられた吹出口で、上記吸込口１０３と連通する構造にて吸込口１０３と同様に下端部が丸み３４を有して内側へ折曲され、その折曲部の先端がベルマウス３０の吹出側端部に接合され、外筐３５内壁全体に滑らかな風路３１を形成する。
【０００７】
３３はガイドで外筐３５の吹出口１０４の中央に設けられ、吸込口１０３側を頂点、吹出口１０４側を底辺とする断面が略三角形にて形成され、このガイドの各部は丸み３４が付けられ、吹出口１０４内に多層平行ノズル３２を形成する。
【０００８】
従来のプロペラファン式の送風機は風の流れ方向が軸方向で上方から下方であり、吸込口１０３と建物の天井面１０７との間に吸込空間Ａ１１０を確保する必要があり、送風機本体１０１を天井面１０７に密着し取付けることはできない。送風機本体１０１は出入口の上部壁面１０５の室内側に本体取付金具１０２部分で取付けられている。送風機を天井や壁面、床面に取り付ける場合、各面に密着する状態とはならない。
【０００９】
【発明が解決しようとする課題】
図１７のような横断流羽根を用いた送風機の場合、通風量が確保できずシール効果が十分でないと言う問題があった。また羽根はファン効率が３０％程度と低く、特に回転数で周波数が決定される回転音という耳障りな騒音が高いという問題があった。また、羽根は多翼ファンと呼ばれる小さな翼が多数枚（通常１２枚程度）あるもので、翼に埃が付着しやすいことから、羽根の軸方向長さが長いということもあり、バランスが失われ振動が大きくなるといった問題があった。さらには羽根の着脱が複雑で清掃が困難であった。さらに、プロペラファンを使用する場合は、図１８に示すように吸込口１０３と建物の間に空間を確保する必要があり、製品を天井面に密着し取付けることができないのでエアーカーテンなどに使う場合、使用個所に制限される等の問題があった。
【００１０】
また、プロペラファンの特徴である吹出し流れの旋回成分を完全に取り去ることができず、また、吹出口はノズル形で吹出面積が吸込面積に比べ小さくなっており圧力損失が発生し送風機のもつ静圧を吹出動圧に効率良く変更するまでには至っていない。この様に風速が確保しにくく、エアーカーテンとしての断熱などの性能が確保できないと言う問題があった。プロペラファンで風量および風速を確保しようとする技術として、特公平６−３５８８０号公報が知られているが性能確保のためスクロールケーシングを使用したり装置全体を傾けたりするなど構造が複雑になり、かつ、寸法が大きくなり取付個所の制限や性能を押さえる必要があるなどの問題があり、しかも、吹出し風が広がってしまいエアーシールに使えないと言う問題があった。さらには、複数個のプロペラファンを使用するため、製造コストの中で最も高いモーターを多数使用するにもかかわらず開口高さが高い場所のエアーシールや、外部環境次第によっては効果的なエアーカーテンが得られないという問題があった。しなければならないという問題があった。又送風機を使用する場合ファンよりも大幅に大きなガイドやケーシングを必要とし、これを小さくしようとすると、ファン効率の低下や騒音の増大が発生するという問題があった。
【００１１】
この発明は上述のような問題を解決するためになされたもので、吹出し風の方向と風速を確保して遠方まで送風できる信頼性の高い装置を得ることを目的とする。またこの発明は簡単な構造で一つの方向へ大きな風量と高い風速が得られる装置を得ることを目的とする。さらにこの発明は性能を低下させずに小型の装置を得ることを目的とする。
【００１２】
【課題を解決するための手段】
請求項１記載の送風機は、駆動手段により回転駆動されて送風を行うプロペラファンと、このプロペラファンの周囲に設けられ送風を軸方向に導くとともに、プロペラファンの端部付近から外周方向に送風を導く風路形成手段と、この風路形成手段を一方の側壁とし、外周方向の送風を一端から吹出し、この吹出方向に対向する他端の面を前記プロペラファンとの距離を保ち閉鎖空間を形成するように側壁と接続されたファンケーシングと、このファンケーシング内に収納されプロペラファンの軸方向に所定間隔で前記プロペラファンと対向するように設けられ側壁との間に外周方向に送風を導くディフューザー風路を形成する薄板状の風路部材と、この薄板状の風路部材と側壁と対向する面に設けた他方の側壁との間にファンケーシングの外周近傍からディフューザー風路よりの送風を導き外部に吹出すファンケーシングの幅方向に設けた吹出口と、を備え、風路部材の形状を、プロペラファンの中心から吹出口側と閉鎖空間側の形状を変え、吹出し側の面積よりも閉鎖空間側の面積を小さくして幅方向寸法を押さえたものである。
【００１４】
請求項２記載の送風機は、駆動手段により回転駆動されて送風を行うプロペラファンと、このプロペラファンの周囲に設けられ送風を軸方向に導くとともに、プロペラファンの端部付近から外周方向に送風を導く風路形成手段と、この風路形成手段を一方の側壁とし、外周方向の送風を吹出す吹出口を一端に設け、この吹出口に対向する他端の面を前記プロペラファンとの距離を保つように半円形状とした側壁と接続されたファンケーシングと、このファンケーシング内に収納されプロペラファンの軸方向に所定間隔で前記プロペラファンと対向するように設けられ側壁との間に外周方向に送風を導くディフューザー風路を形成する薄板状の風路部材と、を備え、この薄板状の風路部材と側壁と対向する面に設けた他方の側壁との間にファンケーシングの外周近傍からディフューザー風路よりの送風を導き吹出口より吹出させるとともに、風路部材の形状が、プロペラファンの中心を通り側壁と直角に交わる水平中心線と側壁と平行になる垂直中心線とを決めた時に、水平中心線を境として、吹出し口に近い側の形状を前記プロペラファンより大きく、また吹出し口より遠い側の形状を水平中心線上の２点と垂直中心線上の吹出し口より遠い側に駆動手段の外形より大きい１点とを決め、これら３点をつなぐものである。
【００１５】
請求項３記載の送風機は、プロペラファンの羽根の外径寸法に対し、風路部材の幅方向の大きさを０．７〜１．０５倍にし、ファンケーシングの幅方向の大きさを１．２〜１．２５倍としたものである。
【００１６】
請求項４記載の送風機は、風路部材の軸方向取付け位置を、吹出口の中心付近から所定のずれた位置までの間に取付けたものである。
【００１８】
【発明の実施の形態】
実施の形態１．
図１は本発明の送風機の製品構成の側面図で、図２は化粧グリルを取外した状態の正面図である。また図３は本発明の送風機の風路部材の形状を変えた製品構成の側面図で、図４は化粧グリルを取外した状態の図３に対する正面図である。又図５は図１に使用している風路部材の説明図である。図において、２は駆動モーター１により回転駆動されて送風作用を行うプロペラファン、５はこのプロペラファン２に空気を導くためのベルマウスケーシング、１６は前記プロペラファン２の回転軸に直交する方向に吹出口１０４を有し、回転軸に直交する断面の外形が略半円形であるファンケーシング、３はこのファンケーシング１６内に上記プロペラファン２と所定間隔で対向するように設けられ通風ガイドの役割を果たす薄板状の第１の風路部材、１５は送風機本体、１０３は一面が開口されその開口面であるファンの吸込口、１５ａはファン吸込口１５の反対面の本体背面、１１は本体背面１５ａのほぼ中央に駆動モーター１と第１の風路部材３を固定するモーター取付板、２２は駆動モーター１の回転軸１ａにはプロペラファン２が着脱自在に取付けられているファン固定ナット、９はプロペラファン２の外径寸法より大きく構成され略平行に取付けられた円板状の第１の風路部材３との間で形成されるディフーザー風路、１０は遠心ディフューザー風路背面空間である。
【００１９】
第１の風路部材３の外周部にはこれより大きいファンケーシング１６が回転軸１ａを中心とする半円形で取付けられ、これと反対面に位置する本体側面にファンの吹出口１０４を設けている。なおファンケーシング全体はプロペラファン２の通風ガイドであるベルマウスケーシング５と本体背面１５ａ、ファンケーシング１６、吹出口１０４が本体１５に一体に結合されて形成し、さらに化粧グリル１４を含め本体１５を構成している。ファンの吸込口１０３には化粧グリル１４が着脱自在に、ファンの吹出口１０４には、スクロールケーシングの幅方向に複数枚の左右風向板(整流板)１７が吹出風路を幅方向に仕切るように取付けられている。なお図２に示すように、吹出口１０４は本体１５のファンケーシング１６の幅方向全体に開口している。
【００２０】
プロペラファン２により、化粧グリル１４、ファン吸込口１０３を通り吸込まれた空気はプロペラファンの回転により軸方向および径方向への力を受けるとともにベルマウスケーシング５、第１の風路部材３により軸方向から径方向へ流れの速度エネルギーを無駄に棄てることなく静圧に変換して流すことが出来る。すなわち、ベルマウスケーシングから第１の風路部材までの外周方向への吹出空間で軸方向の流れを径方向の流れに変換している遠心ディフューザー風路９によりプロペラファンの大風量、低騒音、高効率の特徴を生かしたまま流れを９０°変更して、従来のプロペラファンの流れである軸方向通風に比べ圧力（静圧）を上げることが出来る。すなわち遠心ディフューザー風路により従来のプロペラファンで無駄に棄てられていた速度エネルギー分を静圧に変換することにより特性を向上させている。
【００２１】
遠心ディフューザー風路９から径方向へ流れの方向を変更された空気は、図２の下方側はそのまま送風機本体１５の左右の側面にガイドされファンの吹出口１０４から吹出される。すなわち下方向へプロペラファンの大きな風量と遠心ディフユーザー風路で変換された圧力による高い風速で吹出されるので遠方へ送風できる。しかも上方側への送風はファンケーシング１６に衝突し本体背面１５ａと第１の風路部材３の間に形成された遠心ディフューザー風路背面空間１０側にすなわち第１の風路部材３の外周部で約１８０°流れの向きを変え、遠心ディフューザー風路背面空間１０を通り吹出口１０４から吹出される。また図２に示されるように側面への送風も半円形状のファンケーシングや本体１５の側壁に衝突し本体背面１５ａと第１の風路部材３の間に形成された遠心ディフューザー風路背面空間１０側にすなわち第１の風路部材３の外周部で流れの向きを変え本体１５の下部全体に開口している吹出口１０４に集められ一定方向に大きな風量と高い風速で吹出す。すなわち、化粧グリル１４の前面から吸込まれた空気は流れ方向を９０°変更し、さらにスクロールケーシング１６により箱型本体側面の４面に向かう径方向の流れを箱型本体側面の１面に集め吹出す。
【００２２】
従来のファンのように巻初めが存在し、吹出口にかけて渦巻きを拡大させてスムーズに風を流そうとするスクロール方のケーシングでは風量を確保し騒音を低下させることはできても、拡大した吹出口からの吹出す拡散された風は吹出口の位置により風速が大きく異なり遠方への送風は困難である。本発明の図３、４のようにファンケーシング１６と風路部材３の間の隙間は密閉側すなわち反吹出し側では同一であり、吹出し側にいくほど隙間が広がるためプロペラファンからの送風は吹出し側に集中することになり風の流れはファンを出てから拡散させずに一定方向に集中させるので、風量、風速を保ったまま遠方へ送風させることができる。さらにファンケーシング１６と本体１５の間にはケーシング背面空間２７が形成され部品類や配線を収納できる。しかもプロペラファンは遠心ファンで横断流ファンなど他の羽根に比べ羽形状が簡単なため軽金属で容易に製造でき強度が高く軽量となり、高速回転が可能になり小型で風量を得ることができる。
【００２３】
このような送風機は、図３、４に示されるように第１の風路部材であるプレート３は円形の形状であり、類似の形状のものを特願平１１−２６５１９１において説明しており、その中で前記第１の風路部材３の形状は羽根外径の１．１５〜１．２倍が最適としている。しかしながら、本発明においては送風性能に大きな影響与えることなく、前記第１の風路部材３の形状をさらに小型化することができた。図３、４の構成においては風路部材をファンの軸中心に対し一円の形状にしているが、プロペラファンの羽の外径寸法に対し、風路部材の外径寸法を０．７−１．０５倍と小径のものにしている。さらに、図１、２に対してはこの小型化した前記第１の風路部材３の形状として、前記プロペラファン２の回転中心、これは前記駆動モーター１の中心と同じであるがこの中心位置をとおり、図２の様な正面図で見た時に水平になる水平中心線と垂直になる垂直中心線を考えた時に、図２の水平中心線より下側つまり吹出し口１０４側の半分の前記第１の風路部材３の形状は羽根外径の１．１５〜１．２倍とし、図５のように水平中心線より上側つまり前記スクロールケーシング１６側である密閉空間側の半分の形状は、下側すなわち吹出口側の第１の風路部材３が水平中心線と交わる２点を両端とし、垂直中心線上に前記駆動モーター１を取付ける事ができる様、この駆動モーター１の外径より大きくとった点を含める範囲で小型化してある。これにより、図２のように吹出口の長さ寸法である本体１５の幅寸法を大幅に小さくすることができる。この時、前記第１の風路部材３と前記スクロールケーシング１６とで形成される水平中心線より上側の面積は、前記スクロールケーシング１６と水平中心線とで形成される面積の６０％以上を確保するように形成する。
【００２４】
図６は、例えばエアーカーテンとして製品構成された本体構成が同一寸法の送風機が送風を行った時の送風方式の違いによる風速分布の違いを示したもので、（ａ）はプロペラファン式でディフューザーを形成する風路部材を備えた送風機の場合、（ｂ）は従来の図１８のプロペラファン式の送風機による場合、（ｃ）は従来の図１７の横断流羽根式による送風機の場合であり、それぞれ製品の標準設置高さは３．５ｍである。図６において縦軸は送風機の吹出口からの距離、すなわち製品からの距離で０mから３．５メートルの間を示し、横軸は送風機の幅寸法、すなわち製品の横幅寸法を示し、１、１０は製品両端、５、６は製品中央付近となり、製品の吹出口から吹出される送風の風速に対しての区分け、たとえば７−１０ｍ／ｓや１−４ｍ／ｓの風速の領域の区分けが示されている。
【００２５】
（ａ）の本発明による場合、製品全体として送風にムラが無い。また標準的な設置高さに設置された時の床面になる３．５ｍの位置の風速を見ても１−４ｍ／ｓの風速の領域の区分けで３ｍ/ｓ以上となっており、外部から侵入しようとする風などの遮断を目的として送風を行った場合、充分にエアーシール効果である遮断効果が期待できる。
【００２６】
（ｂ）の従来のプロペラファン式の場合、製品として送風は比較的ムラはないが、全体的に製品の両端付近の風速が低くなっていることがわかる。このため、風などの遮断を目的として送風を行った場合、製品中央部に比べ両端付近の遮断効果が低下する。また、標準的な設置高さに設置された時の床面になる３．５ｍの位置の風速を見ても中央部付近しか３ｍ/ｓ以上を維持できてなく、風などの遮断を目的として送風を行っても、本発明の物に比べ効果が弱い。
【００２７】
（ｃ）の従来の横断流羽根式の場合、標準的な設置高さに設置された時の床面になる３．５ｍの位置の風速は３ｍ/ｓ以上となり、風などの遮断を目的として送風を行った場合、本発明と同様の遮断効果が期待できるが、製品の構造として製品中央にモーターが設置されるため、特に吹出口近傍において製品中央部分の送風ができず、風などの遮断を目的として製品から送風を行っても、製品中央部付近や本体端部に遮断効果が見込めない部分を生じる。なお遮断効果には室内のようにエアコンで生成する温冷熱を外部と遮断する熱の遮断があり、この場合はある程度気流が届いていればその気流によりゾーンをセパレートでき必要以上の風速は効果が上げられるわけではない。一方外風を遮断する場合はエアーシールを行う風速が低い場合には外風に対し耐久力が弱いということになる。
【００２８】
またこの時、上記（ｃ）の従来の横断流羽根式の場合の消費電力は５００Ｗであったのに対し、（ａ）の送風機による場合の消費電力は３８５Ｗであった。（ｂ）の従来のプロペラファン式の場合の消費電力は２４６Ｗであったが、上記の通り製品として（ａ）、（ｃ）のものより遮断性能が劣っているため、３．５ｍの高さに対するエアーカーテンとしては問題がある。さらに騒音性能としては、実設置状態における比較で、（ｃ）の従来の横断流羽根式の場合が７２ｄＢに対し、（ａ）の本発明による場合が６８ｄＢとなった。（ｂ）の従来のプロペラファン式の場合も６８ｄＢだった。
【００２９】
このように小型で風量を出せるプロペラファンを使用し、ディフューザーにより静圧特性を維持したまま送風方向を直角に曲げ風速を保ち吹出させることにより風量、風速と低い騒音を得るものであり、これにより効果的なエアーカーテンを得ることができる。一方さらに、この送風機を小型化した場合このディフューザー方式のプロペラファンでも風路面積が減り圧力損失が増えて送風量が減ったり、騒音が高くなるので、本発明では送風特性を改善するためディフューザーを形成する風路部材の幅方向寸法を狭くしたり、風路部材の形状を変えている。エアーカーテンの用途などから見た場合、大規模のビルやデパートなどの３．５ｍの開口高さを目的として設置するタイプと、さらにトラックなどが出入りする工場のトラックヤードなどの開口高さを５ｍ程度に設置するタイプなどがある。後者の場合には図６の（ａ）よりもさらに風量増加が必要である。このように風量増加の手段として、あるいは開口高さ３．５ｍであっても外風環境が厳しい状況の場合もより風速を増すという手段としてこの発明のように風路部材の幅方向の寸法をプロペラファンの羽の外径寸法と同じ位かあるいはそれより小さくする送風機を使用すればよい。
【００３０】
個々の送風機としては駆動手段により回転駆動されて送風を行うファンと、このファンを内蔵しこのファンの吹出す送風を導くとともに、外部から空気を吸い込む吸込口と外部へ吹出す吹出口を有するファンケーシングと、を有するが、回転数に上限があることから送風量を増やすことはできない。又回転数を一番効率のよいところから強引に増やせば、それだけ電気入力が著しく増大しエネルギーを無駄にすることになる。一方羽根を大きくすると送風機も大きくなり、複数の送風機を列状に吹出口を設けるように配置してエアーカーテンを形成させる場合、製品を設置する開口に収まらなくなる。たとえば開口の横幅は１．２ｍ等のように決まっている。又羽根を小さくして並列するユニット数を増やしても各ユニットの送風量も羽根径応じて減るため対策にならない。そのため本発明のように各ユニットの羽根の寸法を、すなわち送風量を維持してユニット自体は小型化し、この小型化に伴う性能の低下や騒音の上昇、すなわちディフューザー部分の風路面積を小型化しても減少させない方向で圧力を維持するとともに風路面積を確保するように、風路部材の形状や寸法を得るものである。この小型化により、開口に対するエアーカーテンを形成する複数の送風機の数を増やすようにしたものである。この発明の送風機を複数密着させて列状に吹出口を並べて吸い込んだ空気を噴出させることにより風量、風速を確保した効果的なエアーシールができ、室内の空調された空気を無駄に外部と交流させずエネルギー対策が行える。一方、すでに存在するエアーカーテン用の送風機が、従来の横断流のファンや、従来のプロペラファンを使用しており、外風の影響などを遮断できないような場合には、エアーカーテンを形成する複数の送風機に対し、本発明の送風機に取り替え、取り替えた後の幅の狭い送風機を密着配置させて取り替える前の送風機の数よりも多い数の送風機によりエアーカーテンを形成させるようにすることにより、省エネルギー効果を高めることができる。
【００３１】
実施の形態２．
図７ないし図１２は本発明の別の実施の形態の例の説明図で同一符号は同一部品を示す。この図７において上記実施の形態１の図２からさらに、第１の風路部材３の横幅をプロペラファン２の外径寸法の０．７〜１．０５倍の位置で本体側面と平行にカットして小型化すると共に、ファンケーシング１６の径の大きさもプロペラファン２の外径寸法の１．２〜１．２５倍にしたものである。これにより本体１５の横幅も小さくできる。
【００３２】
上記実施の形態の例１で示したような、例えば標準設置高さ３．５ｍのエアーカーテンとして製品構成された送風機を、さらに標準設置高さ５ｍのものとして製品を再構成しようと考えた場合、送風をより遠く到達させるため、通常は製品としての送風風量の増加が検討される。風量の増加を検討する手段としては、羽根外径を上げる事が考えられるが、この時エアーカーテンのような製品の場合には製品の横幅寸法などが、製品が設置される間口寸法といった設置場所との関係で決定されている。そのため羽根の外径を上げると製品寸法により送風機の使用個数を減らさねばならず製品風量は減る。逆に送風機の使用個数を増やしても羽根の外形を小さくせねばならず製品としては効果が小さい。羽根の回転数を上げる事ができれば風量を上げる事はできるが、実施の形態１で示したような送風機の場合に通常は交流誘導方式のモーターが使われ、この種のモーターは電源周波数により回転数に上限があり、一定以上に風量を上げる事はできない。そのため、ファンケーシング１６や第１の風路部材３の形状を送風性能を維持しながら小型化することにより送風機を小型化し、製品構成として送風機の使用個数を増やさねば、製品構成としての送風量を増やす事ができなかった。
【００３３】
図７は第１の風路部材３の側面を羽根径の０．７〜１．０５倍の位置で本体側面と平行にカットし、さらに水平中心線より上側の第１の風路部材３の形状は、実施の形態１の場合と同様に下側の第１の風路部材３が水平中心線と交わる２点を両端とし、垂直中心線上に前記駆動モーター１を取付ける事ができる様、この駆動モーター１の外径より大きくとった点を含め、かつ前記第１の風路部材３と前記スクロールケーシング１６とで形成される水平中心線より上側の面積が、前記スクロールケーシング１６と水平中心線とで形成される面積の６０％以上を確保するように形成している。なお、風路部材３をモーターと一体で取り付けしている場合は、モーター取り付け足とモーターとの間に風路部材をはさむようにしてこのモーター取り付け足にモーターとねじで共締めすることができる。この時上記実施の形態１に比べ、風量、騒音といった送風性能はほぼ維持され、送風機の本体寸法は小型化できる。さらに決められた製品寸法内で、使用できる送風機の個数を増やす事が可能となるため、エアーカーテン全体としての製品形態としては送風量を上げる事ができる。
【００３４】
図７はこのように送風機を具体的に小型化した一形態である。第1の風路部材３のディフーザー風路に対する上方部分の径は羽根半径の１．１５〜１．２倍の弧状になっておりその両側端は羽根中心線の延長上で第１の風路部材３の側部に達する。この時、第１の風路部材３の側部は羽根径の約０．９５倍の位置で本体側面と平行にカットされている。今回、この第1の風路部材３とディフーザー風路との風路面積は羽根中心線とディフーザー風路との風路面積の７０〜７５％となっている。本試作品においては、本体外形２４０×２９０ｍｍ、プロペラファン外径２１０ｍｍ、ファンケーシング半径１３０ｍｍ、でプロペラファン２を回転数約２７３０ｒ／ｍで駆動した時、風量をほぼ維持できた。
【００３５】
図８は送風機を小型化した別の一形態である。第１の風路部材３のディフーザー風路に対する上方部分はモーターへの取付け部を残し羽根中心線付近で吹出口に水平にカットしている。この時、第１の風路部材３の側部は羽根径の約０．９５倍の位置で本体側面と平行にカットしている。今回、この第１の風路部材３とディフーザー風路との風路面積は羽根中心線とディフーザー風路との風路面積の７５〜８０％となっている。本試作品においては、本体外形２４０×２９０ｍｍ、プロペラファン外径２１０ｍｍ、ファンケーシング半径１３０ｍｍ、でプロペラファン２を回転数約２７２０ｒ／ｍで駆動した時、風量をほぼ維持できた。ただし上記図２の形状のものに比べ上半分に角部が存在し、これがエッジとなるためか、騒音値が０．４ｄＢ程度、ピーク騒音の値は１．９ｄＢ程度上昇した。
【００３６】
図９は送風機を小型化した別の一形態である。第１の風路部材３のディフーザー風路に対する上方部分はモーターへの取付け部が残る位置で吹出口に水平にカットしている。これにより風路を若干少なくして音の低減を検討した。この時、第１の風路部材３の側部は羽根径の約０．９５倍の位置で本体側面と平行にカットしている。今回、この第１の風路部材３とディフーザー風路との風路面積は羽根中心線とディフーザー風路との風路面積の約６５％となっている。本試作品においては、本体外形２４０×２９０ｍｍ、プロペラファン外径２１０ｍｍ、ファンケーシング半径１３０ｍｍ、でプロペラファン２を回転数約２７５０ｒ／ｍで駆動した時、風量をほぼ維持できた。ただし上記図２の形状のものに比べ騒音値が０．４ｄＢ程度、ピーク騒音の値は１．７ｄＢ程度上昇し図８とあまり変化なかった。
【００３７】
図１０は送風機を小型化した別の一形態である。第１の風路部材３のディフーザー風路に対する上方部分は上記図と同様にモーターへの取付け部が残る位置で吹出口に水平にカットしている。この時、第１の風路部材３の側部は羽根径の約１．０５倍の位置で本体側面と平行にカットしている。これは側部を大きめにしてディフューザーの斜流化効果をあげる検討をしたものである。今回、この第１の風路部材３とディフーザー風路との風路面積は羽根中心線とディフーザー風路との風路面積の約６０〜６５％となっている。本試作品においては、本体外形２４０×２９０ｍｍ、プロペラファン外径２１０ｍｍ、ファンケーシング半径１３０ｍｍ、でプロペラファン２を回転数約２７４０ｒ／ｍで駆動しても、上記図２の形状のものに比べ風量は１％程度低い。騒音値も変わらないが、ピーク騒音の値は０．５ｄＢ程度下がった。
【００３８】
図１１は上記実施例３に従い送風機を小型化した別の一形態である。第１の風路部材３のディフーザー風路に対する上方部分は羽根半径の０．７〜０．８倍の弧状になっておりその両側端は羽根中心線の延長上で第１の風路部材３の側部に達している。この時、第１の風路部材３の側部も羽根径の０．７〜０．８倍の位置で本体側面と平行にカットしている。今回、この第１の風路部材３とディフーザー風路との風路面積は羽根中心線とディフーザー風路との風路面積の約６０〜６５％となっている。この構造は側部の風路面積を大きくしたが斜流効果の出る羽径より大きい風路部材３の範囲が小さくなる分だけ、斜流効果が下がり風速が低下する。すなわち本発明では、プロペラファンからの流れを、斜流プレートにより圧力回復させ圧損に強く、より高風速の流れを作るという斜流効果と、風路面積の確保による圧力損失の低減との兼ね合いを検討している。本試作品においては、本体外形２４０×２９０ｍｍ、プロペラファン外径２１０ｍｍ、ファンケーシング半径１３０ｍｍ、でプロペラファン２を約２７７０ｒ／ｍで駆動した時、上記図２の形状のものに比べ風量は１％程度上がる。騒音値は０．６ｄＢ程度上がり、ピーク騒音の値も１．５ｄＢ程度上がる。
【００３９】
図１２は送風機を小型化した別の一形態である。第１の風路部材３のディフーザー風路に対する上方部分は羽根半径の約０．９５倍の弧状になっておりその両側端は羽根中心線の延長上で第１の風路部材３の側部に達している。この時、第１の風路部材３の側部も羽根径の約０．９５倍の位置で本体側面と平行にカットしている。今回風路面積を小さくし、この第１の風路部材３とディフーザー風路との風路面積は羽根中心線とディフーザー風路との風路面積の約３５〜４０％となっている。本試作品においては、本体外形２４０×２９０ｍｍ、プロペラファン外径２１０ｍｍ、ファンケーシング半径１３０ｍｍ、でプロペラファン２を回転数約２７３０ｒ／ｍで駆動した時、上記図２の形状のものに比べ風量は１．４％程度下がる。騒音値もほとんど変わらず、ピーク騒音の値が０．８ｄＢ程度下がるだけだった。以上のように図７ないし図１２のさまざまな寸法や形状の風路部材を検討したが、使用できる範囲であるとともに、要求される特性の仕様に基づきたとえば音を小さくするなどの要求により選択できることになる。
【００４０】
実施の形態３．
図１３は、図５示す本発明の送風機の側面図である。他の図面と同一符号は同じ物を示す。１８は前後風向板である。この時第１の風路部材３は本体背面１５ａのほぼ中央に取付けられたモーター取付板１１に駆動モーター１と共に固定されている。この時風路部材３の位置は吹出し口１０４のほぼ中央に位置している。
【００４１】
図１４は図１３の第１の風路部材３を吹出口１０４の縦幅の５％プロペラファン２に近づけたものである。すなわち図１３に比べ風路部材を軸方向に５ｍｍプロペラファンのほうへずらしている。この時、風量、騒音値共に図１３の時とほぼ変わらない。
【００４２】
また図１５は図１３の第１の風路部材３を吹出口１０４の縦幅の１０％プロペラファン２に近づけたものである。すなわち図１３に比べ風路部材を軸方向に１０ｍｍプロペラファンのほうへずらしている。この時も、風量、騒音値共に図１３の時とほぼ変わらない。
【００４３】
図１６は図１３の第１の風路部材３を吹出口１０４の縦幅の１５％プロペラファン２に近づけたものである。すなわち図１３に比べ風路部材を軸方向に１５ｍｍプロペラファンのほうへずらしている。この時、騒音値は図１３の時とほぼ変わらないが、風量は２％程度減少した。以上から、ほぼこの程度まで、すなわち吹出口の中央付近から１５％程度ずらす範囲であれば目的として得たい特性を維持できることになる。この風路部材の軸方向位置は、前後風向板１８の配置との関係出スムースな吹出しが得られるように、あるいは、風路部材の取り付け構造に応じてずらす構成にし、特性に影響しない許容範囲内で配置すればよい。
【００４４】
【発明の効果】
請求項１に関する発明によれば、駆動手段により回転駆動されて送風を行うプロペラファンと、このプロペラファンの周囲に設けられ送風を軸方向に導くとともに、プロペラファンの端部付近から外周方向に送風を導く風路形成手段と、この風路形成手段を一方の側壁とし、外周方向の送風を一端から吹出し、この吹出方向に対向する他端の面を前記プロペラファンとの距離を保ち閉鎖空間を形成するように側壁と接続されたファンケーシングと、このファンケーシング内に収納されプロペラファンの軸方向に所定間隔で前記プロペラファンと対向するように設けられ側壁との間に外周方向に送風を導くディフューザー風路を形成する薄板状の風路部材と、この薄板状の風路部材と側壁と対向する面に設けた他方の側壁との間にファンケーシングの外周近傍からディフューザー風路よりの送風を導き外部に吹出すファンケーシングの幅方向に設けた吹出口と、を備え、風路部材の形状を、プロペラファンの中心から吹出口側と閉鎖空間側の形状を変え、吹出し側の面積よりも閉鎖空間側の面積を小さくして幅方向寸法を押さえたので、簡単な構造で送風機を小型化でき、かつ、風量と風速が確保できる送風機を得ることができる。
【００４６】
請求項２に関する発明によれば、駆動手段により回転駆動されて送風を行うプロペラファンと、このプロペラファンの周囲に設けられ送風を軸方向に導くとともに、プロペラファンの端部付近から外周方向に送風を導く風路形成手段と、この風路形成手段を一方の側壁とし、外周方向の送風を吹出す吹出口を一端に設け、この吹出口に対向する他端の面を前記プロペラファンとの距離を保つように半円形状とした側壁と接続されたファンケーシングと、このファンケーシング内に収納されプロペラファンの軸方向に所定間隔で前記プロペラファンと対向するように設けられ側壁との間に外周方向に送風を導くディフューザー風路を形成する薄板状の風路部材と、を備え、この薄板状の風路部材と側壁と対向する面に設けた他方の側壁との間にファンケーシングの外周近傍からディフューザー風路よりの送風を導き吹出口より吹出させるとともに、風路部材の形状が、プロペラファンの中心を通り側壁と直角に交わる水平中心線と側壁と平行になる垂直中心線とを決めた時に、水平中心線を境として、吹出し口に近い側の形状を前記プロペラファンより大きく、また吹出し口より遠い側の形状を水平中心線上の２点と垂直中心線上の吹出し口より遠い側に駆動手段の外形より大きい１点とを決め、これら３点をつなぐので、送風性能に大きく影響させること無く送風機の小型化ができる。
【００４７】
請求項３に関する発明によれば、プロペラファンの羽根の外径寸法に対し、風路部材の幅方向の大きさを０．７〜１．０５倍にし、ファンケーシングの幅方向の大きさを１．２〜１．２５倍としたため、送風性能を維持しながら、送風機本体を小型化でき、また一定の製品寸法でより多くの送風機を組込み送風量を増やすことができる製品構成が可能となる。
【００４８】
請求項４に関する発明によれば、風路部材の軸方向取付け位置を、吹出口の中心から所定のずれた位置までの間に取付けられるため、送風性能を悪化させる事無く、都合の良い位置を任意に決める事ができる。
【図面の簡単な説明】
【図１】この発明の一実施の形態による送風機の側断面図である。
【図２】この発明の一実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図３】この発明の一実施の形態による送風機の側断面図である。
【図４】この発明の一実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図５】図２の内駆動モーターと第１の風路部材とを抜き出した状態の正面図である。
【図６】この発明の一実施の形態による送風機による送風の風速分布図を示し、(ａ)は本発明のもの、(ｂ)は、従来のプロペラファン式によるもの、(ｃ)は従来の横断流羽根式によるものを、それぞれ示す図である。
【図７】この発明の他の実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図８】この発明の他の実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図９】この発明の他の実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図１０】この発明の他の実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図１１】この発明の他の実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図１２】この発明の他の実施の形態による送風機の化粧グリルを取外した状態の正面図である。
【図１３】この発明の他の実施の形態による送風機の側断面図である。
【図１４】この発明の他の実施の形態による送風機の側断面図である。
【図１５】この発明の他の実施の形態による送風機の側断面図である。
【図１６】この発明の他の実施の形態による送風機の側断面図である。
【図１７】従来の送風機の側断面図である。
【図１８】従来の送風機の側断面図である。
【符号の説明】
１駆動モーター、２プロペラファン、３第１の風路部材、５ベルマウスケーシング、９遠心ディフューザー風路、１０遠心ディフューザー風路背面空間、１１モーター取付板、１４化粧グリル、１５本体、１６ファンケーシング、１７左右風向板、１８前後風向板、２２羽根固定ナット、２３モーター固定ネジ、２７スクロールケーシング背面空間、３０ベルマウス、３１滑らかな風路、３２多層平行ノズル、３３ガイド、３４丸み、３５送風機の筐体、３６モーター取付板、１０１送風機本体、１０２本体取付金具、１０３吸込口、１０４吹出口、１０５出入口の上部壁面、１０６開放された出入口、１０７天井面、１０８床面、１０９開口のない壁面、１１０吸込空間、１１３横断流ファン、１１４駆動モーター、１１５ファンケーシング、１１６風向板。[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a blower that is installed at an open doorway of a building and can be used for a technique such as an air curtain that mainly insulates the inside and outside of a building during cooling and heating, and has improved aerodynamics and noise characteristics. A small fan that uses a propeller fan.In the artIt is related.
[0002]
[Prior art]
A conventional blower of this type is called a brand name air curtain, and is a transverse flow blade called a line flow fan, using circular and long blades in the axial direction, and blows air to a blower outlet provided at a position perpendicular to the suction port. Is.
[0003]
FIG. 17 is a side sectional view seen from the direction of the rotation axis in the state of attachment of the blower using the conventional cross flow blade shown in Japanese Patent Laid-Open No. 6-313603. The blower main body 101 installed on the indoor side of the upper wall surface 105 of the entrance at the upper part of the entrance 106 opened in the house has a suction port 103 on the side opposite to the installation surface side 101a and an outlet 104 on the lower surface. Yes. Further, in the blower main body 101, there are a transverse flow blade 113 that sends wind from the suction port 103 to the blowout port 104 and a drive motor 114 that rotationally drives the fan, and a fan that guides the flow of wind to the outer peripheral portion of the crossflow blade 113. A casing 115 is provided. Further, a plurality of wind direction adjusting plates 116 for adjusting the direction of the blowing air are supported at the air outlet 104 so as to be rotatable about the upper end portion. When the cross flow vane 113 is rotated by the rotation of the drive motor 114 configured as described above, the air sucked from the suction port 103 passes through the cross flow vane 113 and is blown to the blowout port 104 by the fan casing 115. The air curtain flow is formed from above the opened entrance 106 to below. In the attached state of this figure, there is a suction space A110 between the ceiling surface 107 and the blower body upper surface 101b, which is the opposite surface of the blower outlet 104 of the blower body 101, but the blower body upper surface 101b is placed on the ceiling surface 107. Since the suction port 103 is not blocked even in the state where the suction space A110 is closed, it can be mounted without affecting the blowing action.
[0004]
In the crossflow blade, the suction opening 103 and the blowout port 104 of the fan casing are the target positions on the rotation axis, and both the suction flow and the blowout flow flow through the crossflow blade 113, that is, when the rotation is almost 180 °. The suction flow is a blow-off flow, and after all, only about half of the entire circumference of the cross flow blade is working, so the fan efficiency is lower than that of a propeller fan, etc., and the external dimensions of the main body 101 are the blade outer diameter of the cross flow blade. Although it is small, it is not so small because it has a fan casing. Since the blowout port 104 of the fan casing has a small width dimension and a long shape in the axial direction due to the blowout of the transverse flow blades, the blowout flow is a flow with a fast wind speed but a small air volume. Due to the flow of the wind, the person feels uncomfortable when there is a person directly under the outlet, and in order to secure the air volume, the blowing wind speed becomes higher and the wind speed is higher even on the floor surface. Or unpleasant conditions such as a bounce wind hit other people.
[0005]
As a blower for solving the above problem, there is a blower described in JP-A-6-313603. This blower uses a plurality of propeller fans, and a plurality of blowers are provided in parallel. Since the above blower uses a propeller fan, it is characterized by low noise and high fan efficiency, but the flow direction of the wind, that is, the suction direction and the blow direction is the axial direction, and the perpendicular direction of the conventional crossflow blade type is not.
[0006]
FIG. 18 is a side sectional view showing a product configuration of a conventional propeller fan type blower. 35 is an outer casing of the blower 101, 103 is a suction port provided in an upper portion of the outer casing, and the suction port has an upper end portion. A cylindrical bell mouth 30 having roundness 34 is formed of a resin molded product. Reference numeral 36 denotes a motor mounting plate that fixes the drive motor 1 having the propeller fan 2 fixed to the rotating shaft by a blade fixing nut 42 so as to be positioned between the bell mouths 30. Note that a plurality of air blowing units including the drive motor 1, the propeller fan 2, and the bell mouth 30 are provided in parallel in the outer casing 35 at equal intervals. Reference numeral 104 denotes an air outlet provided in a lower portion of the outer casing 35. The air outlet 104 has a structure communicating with the air inlet 103. The air outlet 103 is bent inward with a rounded end 34 like the air inlet 103. Is connected to the outlet side end of the bell mouth 30 to form a smooth air passage 31 on the entire inner wall of the outer casing 35.
[0007]
Reference numeral 33 denotes a guide provided at the center of the air outlet 104 of the outer casing 35. The cross section with the suction port 103 side at the top and the air outlet 104 side at the bottom is formed in a substantially triangular shape, and each part of the guide is rounded 34. The multi-layer parallel nozzle 32 is formed in the air outlet 104.
[0008]
The conventional propeller fan type blower has an axial flow direction from the upper side to the lower side, and it is necessary to secure a suction space A110 between the suction port 103 and the ceiling surface 107 of the building. It cannot be attached in close contact with the surface 107. The blower main body 101 is attached to the indoor side of the upper wall surface 105 of the entrance / exit with a main body mounting bracket 102 portion. When the blower is attached to the ceiling, wall surface, or floor surface, it does not come into close contact with each surface.
[0009]
[Problems to be solved by the invention]
In the case of a blower using cross flow blades as shown in FIG. 17, there is a problem that the amount of ventilation cannot be secured and the sealing effect is not sufficient. Further, the blades have a low fan efficiency of about 30%, and there is a problem that annoying noise such as a rotating sound whose frequency is determined by the number of rotations is particularly high. In addition, the blades have many small blades (usually about 12 blades) called multi-blade fans, and dust tends to adhere to the blades, so the axial length of the blades is long and the balance is lost. There was a problem that crack vibration increased. Furthermore, it was difficult to clean the blades because of the complicated blade attachment and detachment. Furthermore, when using a propeller fan, it is necessary to secure a space between the inlet 103 and the building as shown in FIG. 18, and the product cannot be installed in close contact with the ceiling surface. There were problems such as being restricted to the place of use.
[0010]
In addition, the swirl component of the blowout flow, which is a feature of the propeller fan, cannot be completely removed, and the blowout port is a nozzle type, and the blowout area is smaller than the suction area. It has not yet been possible to efficiently change the pressure to the blowing dynamic pressure. In this way, there is a problem that it is difficult to secure the wind speed and the performance such as heat insulation as an air curtain cannot be secured. Japanese Patent Publication No. 6-35880 is known as a technique for securing the air volume and wind speed with a propeller fan, but the structure becomes complicated, such as using a scroll casing or tilting the entire apparatus to ensure performance, In addition, there is a problem that the size becomes large and it is necessary to limit the mounting location and to suppress the performance, and further, there is a problem that the blowing air spreads and cannot be used for an air seal. In addition, since multiple propeller fans are used, air seals in places with high opening height despite the use of many motors with the highest manufacturing cost, and effective air curtains depending on the external environment There was a problem that could not be obtained. There was a problem that had to be done. In addition, when using a blower, a guide or casing that is significantly larger than the fan is required, and if it is attempted to reduce the size, there has been a problem that fan efficiency is reduced and noise is increased.
[0011]
  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a highly reliable device that can ensure the direction and speed of the blowing air and can blow far away. Another object of the present invention is to obtain an apparatus that can obtain a large air volume and a high air velocity in one direction with a simple structure. A further object of the present invention is to obtain a compact device without degrading performance.The
[0012]
[Means for Solving the Problems]
  The blower according to claim 1 is a propeller fan that is rotationally driven by the driving means to blow air, and is provided around the propeller fan to guide the air flow in the axial direction, and blows air from the vicinity of the end of the propeller fan to the outer circumferential direction. The air path forming means for guiding, and the air path forming means as one side wall, blows air in the outer peripheral direction from one end, and forms a closed space while maintaining the distance from the propeller fan at the other end face facing the blowing direction. A fan casing connected to the side wall, and a diffuser that is housed in the fan casing and is provided to face the propeller fan at a predetermined interval in the axial direction of the propeller fan and guides the air flow between the side wall and the outer periphery. A fan casing is formed between a thin plate-like air passage member forming an air passage and the other side wall provided on a surface facing the thin plate-like air passage member and the side wall. And a blow-out port formed in a width direction of the fan casing discharged from circumferential proximity to the outside leads to blast from the diffuser air path, the air passage membershapeThe propeller fanChange the shape of the air outlet side and the closed space side from the center, and make the area on the closed space side smaller than the area on the air outlet side to hold down the width dimensionIt is a thing.
[0014]
  Claim2The blower described is a propeller fan that is rotationally driven by a driving means and blows air, and an air passage that is provided around the propeller fan and guides the air flow in the axial direction and from the vicinity of the end of the propeller fan to the outer circumferential direction. The forming means and the air passage forming means are used as one side wall, and an air outlet for blowing the air in the outer peripheral direction is provided at one end, and is opposed to the air outlet.otherA fan casing connected to a side wall whose end surface is semicircular so as to maintain a distance from the propeller fan, and is stored in the fan casing and faces the propeller fan at a predetermined interval in the axial direction of the propeller fan. A thin plate-like air passage member that forms a diffuser air passage that guides air flow in the outer peripheral direction between the thin plate-like air passage member and the other side wall provided on the surface facing the side wall. Between the side wall and the outer periphery of the fan casing, air from the diffuser air passage is guided and blown out from the outlet, and the shape of the air passage member passes through the center of the propeller fan and intersects the side wall at a right angle with the side wall. When determining the vertical center line to be parallel, the shape on the side close to the outlet is larger than the propeller fan and farther from the outlet, with the horizontal center line as the boundary. Jo the farther from the air outlet of the two points and the vertical center line of the horizontal centerline decided and outer greater than one point of the drive means also connecting the three pointsBecauseis there.
[0015]
  Claim3In the blower described, the width direction size of the air passage member is 0.7 to 1.05 times the outer diameter size of the blades of the propeller fan, and the width direction size of the fan casing is 1.2 to 1 times. .25 times.
[0016]
  Claim4In the described blower, the axial attachment position of the air passage member is attached between the vicinity of the center of the air outlet and the position shifted by a predetermined distance.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a side view of a product configuration of a blower according to the present invention, and FIG. 2 is a front view of a state where a decorative grill is removed. FIG. 3 is a side view of the product configuration in which the shape of the air passage member of the blower of the present invention is changed, and FIG. 4 is a front view with respect to FIG. FIG. 5 is an explanatory view of the air passage member used in FIG. In the figure, 2 is a propeller fan that is driven to rotate by a drive motor 1 and performs a blowing action, 5 is a bell mouth casing for guiding air to the propeller fan 2, and 16 is in a direction perpendicular to the rotation axis of the propeller fan 2. A fan casing 3 having an air outlet 104 and having a substantially semicircular outer shape in cross section perpendicular to the rotation axis is provided in the fan casing 16 so as to face the propeller fan 2 at a predetermined interval. 1 is a thin plate-shaped first air passage member, 15 is a blower main body, 103 is a fan suction port that is open on one side, 15a is a rear surface of the main body opposite to the fan suction port 15, and 11 is a rear surface of the main body. A motor mounting plate for fixing the drive motor 1 and the first air passage member 3 at substantially the center of 15a, 22 is a propeller fan 2 on the rotating shaft 1a of the drive motor 1 A fan fixing nut 9 that is detachably attached is a diffuser-like wind formed between a disk-shaped first air passage member 3 that is configured to be larger than the outer diameter of the propeller fan 2 and that is attached substantially in parallel. A passage 10 is a space behind the centrifugal diffuser air passage.
[0019]
A larger fan casing 16 is attached to the outer peripheral portion of the first air passage member 3 in a semicircular shape centering on the rotating shaft 1a, and a fan outlet 104 is provided on the side surface of the main body located on the opposite surface. Yes. The entire fan casing is formed by integrally connecting the bell mouth casing 5, which is a ventilation guide for the propeller fan 2, the main body back surface 15 a, the fan casing 16, and the air outlet 104 to the main body 15, and further including the decorative grill 14 and the main body 15. It is composed. A decorative grille 14 is detachably attached to the fan inlet 103, and a plurality of right and left airflow direction plates (rectifier plates) 17 are arranged in the width direction of the scroll casing so as to partition the blowout airway in the width direction. Installed on. As shown in FIG. 2, the air outlet 104 opens in the entire width direction of the fan casing 16 of the main body 15.
[0020]
The air sucked by the propeller fan 2 through the decorative grille 14 and the fan suction port 103 is subjected to axial and radial forces by the rotation of the propeller fan and is axially supported by the bell mouth casing 5 and the first air passage member 3. From the direction to the radial direction, the flow velocity energy can be converted to static pressure and flowed without wasting it. That is, the centrifugal diffuser air passage 9 that converts the axial flow into the radial flow in the outer circumferential blowing space from the bell mouth casing to the first air passage member, the large air flow of the propeller fan, low noise, The flow can be changed by 90 ° while taking advantage of the high efficiency, and the pressure (static pressure) can be increased compared to the axial ventilation that is the flow of the conventional propeller fan. That is, the characteristics are improved by converting the velocity energy, which was wasted in the conventional propeller fan by the centrifugal diffuser air passage, into static pressure.
[0021]
The air whose direction of flow is changed in the radial direction from the centrifugal diffuser air passage 9 is guided to the left and right side surfaces of the blower body 15 as it is in the lower side of FIG. That is, since the air is blown out at a high wind speed due to the large amount of air flow of the propeller fan and the pressure converted in the centrifugal diff user air passage, the air can be blown away. In addition, the upward air flow collides with the fan casing 16 and enters the centrifugal diffuser air passage back space 10 side formed between the main body back surface 15a and the first air passage member 3, that is, the outer peripheral portion of the first air passage member 3. The direction of the flow is changed by about 180 °, and the air is blown out from the outlet 104 through the centrifugal diffuser air passage rear space 10. Further, as shown in FIG. 2, the air blown to the side also collides with the semicircular fan casing or the side wall of the main body 15, and the centrifugal diffuser air passage back space formed between the main body back surface 15 a and the first air passage member 3. The direction of flow is changed to the 10 side, that is, at the outer peripheral portion of the first air passage member 3, and the air is collected at the air outlet 104 opened at the entire lower part of the main body 15 and blown out in a certain direction with a large air volume and a high air speed. That is, the air sucked from the front surface of the decorative grille 14 changes the flow direction by 90 °, and the scroll casing 16 collects and blows the radial flow toward the four sides of the box-type main body on one side of the box-type main body. put out.
[0022]
As with conventional fans, there is the beginning of the winding, and the scroll casing that expands the vortex at the outlet to allow the air to flow smoothly can secure the air volume and reduce noise, but the expanded blowing The diffused wind blown out from the outlet differs greatly depending on the position of the outlet, and it is difficult to blow away. As shown in FIGS. 3 and 4 of the present invention, the gap between the fan casing 16 and the air passage member 3 is the same on the closed side, that is, the anti-blow side, and the gap increases as it goes to the blow side. Since the air flow is concentrated in a certain direction without being diffused after leaving the fan, the air can be blown away while maintaining the air volume and the air speed. Further, a casing back space 27 is formed between the fan casing 16 and the main body 15 to accommodate components and wiring. Moreover, since the propeller fan is a centrifugal fan and has a simple blade shape compared to other blades such as a cross flow fan, it can be easily manufactured with light metal, can be manufactured with high strength and light weight, can be rotated at high speed, and can be obtained in a small size.
[0023]
In such a blower, as shown in FIGS. 3 and 4, the plate 3 as the first air passage member has a circular shape, and a similar shape is described in Japanese Patent Application No. 11-265191. The optimum shape of the first air passage member 3 is 1.15 to 1.2 times the blade outer diameter. However, in the present invention, the shape of the first air passage member 3 could be further reduced without greatly affecting the blowing performance. 3 and 4, the air passage member has a circular shape with respect to the axial center of the fan, but the outer diameter of the air passage member is 0.7- The diameter is 1.05 times smaller. 1 and 2, the reduced size of the first air passage member 3 is the same as the center of rotation of the propeller fan 2, which is the same as the center of the drive motor 1. 2, when a vertical center line that is horizontal and a vertical center line that is vertical when viewed in a front view as shown in FIG. 2 is considered, the lower half of the horizontal center line in FIG. The shape of the first air passage member 3 is 1.15 to 1.2 times the outer diameter of the blade, and as shown in FIG. 5, the shape of the half above the horizontal center line, that is, the sealed space side that is the scroll casing 16 side is From the outer diameter of the drive motor 1, the drive motor 1 can be mounted on the vertical center line with two points where the first air passage member 3 on the lower side, that is, the outlet side intersects the horizontal center line. Reduce the size within the range that includes the big points. . Thereby, the width dimension of the main body 15 which is the length dimension of a blower outlet as shown in FIG. 2 can be reduced significantly. At this time, the area above the horizontal center line formed by the first air passage member 3 and the scroll casing 16 ensures 60% or more of the area formed by the scroll casing 16 and the horizontal center line. To be formed.
[0024]
FIG. 6 shows, for example, the difference in the wind speed distribution due to the difference in the air blowing method when the air blower having the same size as the main body configured as an air curtain blows air. (A) is a propeller fan type diffuser (B) is a case of the conventional propeller fan type blower of FIG. 18, (c) is a case of the conventional cross flow blade type blower of FIG. 17, The standard installation height of each product is 3.5m. In FIG. 6, the vertical axis indicates the distance from the blower outlet, that is, the distance from the product, between 0 m and 3.5 meters, and the horizontal axis indicates the width of the blower, that is, the width of the product. Indicates both ends of the product, 5 and 6 are near the center of the product, and indicates a classification with respect to the wind speed of the air blown from the outlet of the product, for example, a classification of a wind speed region of 7-10 m / s or 1-4 m / s. Has been.
[0025]
According to the present invention of (a), there is no unevenness in ventilation as the whole product. In addition, even if you look at the wind speed at the position of 3.5m on the floor when installed at the standard installation height, it is over 3m / s in the section of the wind speed area of 1-4m / s. When the air is blown for the purpose of shutting off wind or the like trying to enter from the air, it is possible to expect a shut-off effect that is a sufficient air seal effect.
[0026]
In the case of the conventional propeller fan type of (b), it can be seen that the air flow is relatively uneven as a product, but the wind speed in the vicinity of both ends of the product is low as a whole. For this reason, when air is blown for the purpose of blocking wind or the like, the blocking effect near both ends is reduced as compared to the center of the product. In addition, even if you look at the wind speed at the position of 3.5m on the floor when installed at the standard installation height, it can only maintain 3m / s or more only near the center part, for the purpose of blocking wind etc. Even if it blows, the effect is weak compared with the thing of this invention.
[0027]
In the case of the conventional cross-flow vane type of (c), the wind speed at the position of 3.5 m on the floor when installed at the standard installation height is 3 m / s or more, and the purpose is to block the wind etc. When air is blown, the same blocking effect as that of the present invention can be expected. However, since a motor is installed in the center of the product as the product structure, the air cannot be blown at the center of the product, particularly in the vicinity of the air outlet. Even if air is blown from the product for the purpose, a portion where the blocking effect cannot be expected near the center of the product or at the end of the main body is generated. In addition, the blocking effect includes blocking the heat that is generated by the air conditioner from the outside, such as indoors. In this case, if the airflow reaches a certain level, the zone can be separated by the airflow, and the wind speed more than necessary is effective. It is not raised. On the other hand, when the outside wind is blocked, the durability against the outside wind is weak when the wind speed for air sealing is low.
[0028]
At this time, the power consumption in the case of the conventional cross-flow vane type (c) was 500 W, whereas the power consumption in the case of the blower (a) was 385 W. The power consumption in the case of the conventional propeller fan type of (b) was 246 W. However, as described above, the product has a cutting performance that is inferior to that of (a) and (c), so the height is 3.5 m. There is a problem as an air curtain. Furthermore, the noise performance was 68 dB in the case of the present invention in (a) as compared with 72 dB in the case of the conventional cross-flow blade type in (c) as compared with the actual installation state. In the case of the conventional propeller fan type of (b), it was 68 dB.
[0029]
In this way, a small propeller fan that can produce airflow is used, and the airflow, wind speed, and low noise are obtained by bending the airflow direction at a right angle while maintaining the static pressure characteristics with a diffuser, and blowing out while maintaining the wind speed. An effective air curtain can be obtained. On the other hand, when this blower is further downsized, even with this diffuser type propeller fan, the air passage area is reduced, the pressure loss is increased, the air flow is reduced, and the noise is increased.In this invention, the diffuser is used to improve the air blowing characteristics. The width direction dimension of the air channel member to be formed is narrowed or the shape of the air channel member is changed. From the viewpoint of the use of air curtains, etc., the installation height is set at the height of 3.5m in large buildings and department stores, and the opening height in the truck yard of the factory where trucks go in and out is 5m. There are types that are installed to the extent. In the latter case, it is necessary to further increase the air volume as compared with FIG. Thus, as a means for increasing the air volume, or as a means for increasing the wind speed even when the outside wind environment is severe even if the opening height is 3.5 m, the size in the width direction of the air passage member is set as in the present invention. What is necessary is just to use the air blower made as small as the outer diameter dimension of the wing | blade of a propeller fan.
[0030]
Each fan has a fan that is rotationally driven by driving means to blow air, a fan that incorporates this fan, guides the air blown by the fan, and has a suction port for sucking air from the outside and a blower outlet for blowing the air to the outside. However, since there is an upper limit in the number of rotations, it is not possible to increase the blowing amount. Also, if the number of revolutions is forcibly increased from the most efficient point, the electric input is remarkably increased and energy is wasted. On the other hand, when the blades are increased, the blower also becomes larger. When the air curtain is formed by arranging a plurality of blowers so as to form the air outlets in a row, the blower does not fit in the opening where the product is installed. For example, the width of the opening is determined to be 1.2 m. Moreover, even if the blades are made smaller and the number of units to be arranged in parallel is increased, the amount of air blown from each unit also decreases according to the blade diameter, which is not a countermeasure. Therefore, as in the present invention, the size of the blades of each unit, that is, the air flow rate is maintained and the unit itself is downsized, and the performance and noise increase due to this downsizing, that is, the air passage area of the diffuser portion is downsized. However, the shape and dimensions of the air passage member are obtained so that the pressure is maintained in a direction not to be reduced and the air passage area is secured. By this miniaturization, the number of a plurality of blowers that form an air curtain for the opening is increased. A plurality of blowers according to the present invention are arranged in close contact with each other, and the air sucked in by arranging the air outlets in a row can be used to provide an effective air seal that secures the air volume and the air speed, and the air-conditioned air in the room is exchanged with the outside wastefully. Energy measures can be taken without On the other hand, if the existing air curtain blower uses a conventional cross-flow fan or conventional propeller fan and the influence of outside wind cannot be blocked, a plurality of air curtains are formed. By replacing the blower of the present invention with the blower of the present invention, the narrower blower after replacement is closely arranged and the air curtain is formed by a larger number of blowers than before the replacement, thereby saving energy. The effect can be enhanced.
[0031]
Embodiment 2. FIG.
7 to 12 are explanatory views of examples of another embodiment of the present invention, in which the same reference numerals indicate the same parts. In FIG. 7, the lateral width of the first air passage member 3 is further cut parallel to the side surface of the main body at a position 0.7 to 1.05 times the outer diameter of the propeller fan 2 from FIG. As a result, the size of the fan casing 16 is made 1.2 to 1.25 times the outer diameter of the propeller fan 2. Thereby, the horizontal width of the main body 15 can also be reduced.
[0032]
For example, when the fan is configured as an air curtain with a standard installation height of 3.5 m as shown in Example 1 of the above embodiment, and the product is further reconfigured with a standard installation height of 5 m. In order to make the air flow reach farther, an increase in the air flow rate as a product is usually considered. Increasing the outer diameter of the blade can be considered as a means to consider increasing the air flow. At this time, in the case of a product such as an air curtain, the installation width, such as the width of the product, the opening size where the product is installed, etc. Is determined in relation to. Therefore, if the outer diameter of the blade is increased, the number of blowers used must be reduced depending on the product dimensions, and the product air volume is reduced. Conversely, even if the number of blowers used is increased, the outer shape of the blades must be reduced, and the effect is small as a product. If the number of blade rotations can be increased, the air volume can be increased. However, in the case of a blower as shown in the first embodiment, an AC induction motor is usually used, and this type of motor rotates depending on the power frequency. There is an upper limit on the number, and the air volume cannot be increased above a certain level. Therefore, if the size of the fan casing 16 or the first air passage member 3 is reduced while maintaining the blowing performance, the size of the blower is reduced, and if the number of used blowers is increased as the product configuration, the amount of blown air as the product configuration is reduced. I couldn't increase it.
[0033]
In FIG. 7, the side surface of the first air passage member 3 is cut in parallel to the side surface of the main body at a position 0.7 to 1.05 times the blade diameter, and further the first air passage member 3 above the horizontal center line. As in the case of the first embodiment, the shape is such that the lower first air passage member 3 has two points where the horizontal center line intersects at both ends, and the drive motor 1 can be mounted on the vertical center line. The area above the horizontal center line formed by the first air passage member 3 and the scroll casing 16 includes a point larger than the outer diameter of the drive motor 1 and the scroll casing 16 and the horizontal center line. And 60% or more of the area formed is secured. When the air passage member 3 is attached integrally with the motor, the motor passage can be sandwiched between the motor attachment foot and the motor, and the motor attachment foot can be fastened together with the motor and screws. At this time, as compared with the first embodiment, the blowing performance such as the air volume and noise is substantially maintained, and the size of the main body of the blower can be reduced. Furthermore, since it becomes possible to increase the number of blowers that can be used within the determined product dimensions, the amount of blown air can be increased as the product form of the entire air curtain.
[0034]
FIG. 7 shows an embodiment in which the blower is specifically downsized in this way. The diameter of the upper part of the first air passage member 3 with respect to the diffuser air passage is an arc shape that is 1.15 to 1.2 times the blade radius, and both ends thereof are the first air passage on the extension of the blade center line. It reaches the side of the member 3. At this time, the side portion of the first air passage member 3 is cut in parallel with the side surface of the main body at a position about 0.95 times the blade diameter. This time, the air passage area between the first air passage member 3 and the diffuser air passage is 70 to 75% of the air passage area between the blade center line and the diffuser air passage. In this prototype, when the propeller fan 2 was driven at a rotation speed of about 2730 r / m with a main body outer diameter of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume was substantially maintained.
[0035]
FIG. 8 shows another embodiment in which the blower is miniaturized. The upper part of the first air passage member 3 with respect to the diffuser air passage is cut horizontally at the air outlet in the vicinity of the blade center line, leaving an attachment portion to the motor. At this time, the side portion of the first air passage member 3 is cut in parallel with the side surface of the main body at a position about 0.95 times the blade diameter. This time, the air passage area between the first air passage member 3 and the diffuser air passage is 75 to 80% of the air passage area between the blade center line and the diffuser air passage. In this prototype, when the propeller fan 2 was driven at a rotation speed of about 2720 r / m with a main body outer diameter of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume was substantially maintained. However, the corner portion exists in the upper half of the shape of FIG. 2 above, and this may be an edge, so that the noise value increased by about 0.4 dB and the peak noise value increased by about 1.9 dB.
[0036]
FIG. 9 shows another embodiment in which the blower is miniaturized. The upper portion of the first air passage member 3 with respect to the diffuser air passage is cut horizontally at the outlet at a position where the attachment portion to the motor remains. As a result, the wind path was slightly reduced and the reduction of sound was studied. At this time, the side portion of the first air passage member 3 is cut in parallel with the side surface of the main body at a position about 0.95 times the blade diameter. This time, the air passage area between the first air passage member 3 and the diffuser air passage is about 65% of the air passage area between the blade center line and the diffuser air passage. In this prototype, when the propeller fan 2 was driven at a rotational speed of about 2750 r / m with a main body outer diameter of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume was substantially maintained. However, the noise value increased by about 0.4 dB and the peak noise value increased by about 1.7 dB compared to the shape of FIG.
[0037]
FIG. 10 shows another embodiment in which the blower is miniaturized. The upper part of the first air passage member 3 with respect to the diffuser air passage is cut horizontally at the blowout port at a position where the attachment portion to the motor remains as in the above figure. At this time, the side portion of the first air passage member 3 is cut in parallel with the side surface of the main body at a position about 1.05 times the blade diameter. This is a study to increase the drifting effect of the diffuser by enlarging the side. This time, the air passage area between the first air passage member 3 and the diffuser air passage is about 60 to 65% of the air passage area between the blade center line and the diffuser air passage. In this prototype, even if the propeller fan 2 is driven at a rotation speed of about 2740 r / m with a main body outer diameter of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume is larger than that of the shape of FIG. Is about 1% lower. Although the noise value did not change, the peak noise value decreased by about 0.5 dB.
[0038]
FIG. 11 shows another embodiment in which the blower is miniaturized according to the third embodiment. The upper part of the first air passage member 3 with respect to the diffuser air passage has an arc shape 0.7 to 0.8 times the blade radius, and both side ends of the first air passage member 3 extend the blade center line. Has reached the side. At this time, the side portion of the first air passage member 3 is also cut parallel to the side surface of the main body at a position 0.7 to 0.8 times the blade diameter. This time, the air passage area between the first air passage member 3 and the diffuser air passage is about 60 to 65% of the air passage area between the blade center line and the diffuser air passage. In this structure, the side air passage area is increased, but the amount of the air passage member 3 that is larger than the diameter of the blade where the mixed flow effect occurs is reduced, and the mixed flow effect is reduced and the wind speed is reduced. In other words, in the present invention, the flow from the propeller fan is pressure-recovered by the mixed flow plate and is resistant to pressure loss, creating a flow at a higher wind speed, and the balance between reduction of pressure loss by securing the air passage area. Are considering. In this prototype, when the propeller fan 2 is driven at about 2770 r / m with a main body outer diameter of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air flow is 1% compared to the shape of FIG. It goes up. The noise level increases by about 0.6 dB, and the peak noise level also increases by about 1.5 dB.
[0039]
FIG. 12 shows another embodiment in which the blower is miniaturized. The upper part of the first air passage member 3 with respect to the diffuser air passage has an arc shape of about 0.95 times the blade radius, and both side ends thereof are side portions of the first air passage member 3 on the extension of the blade center line. Has reached. At this time, the side portion of the first air passage member 3 is also cut parallel to the side surface of the main body at a position about 0.95 times the blade diameter. The air passage area is reduced this time, and the air passage area between the first air passage member 3 and the diffuser air passage is about 35 to 40% of the air passage area between the blade center line and the diffuser air passage. In this prototype, when the propeller fan 2 is driven at a rotation speed of about 2730 r / m with a main body outer diameter of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume is larger than that of the shape of FIG. It decreases by about 1.4%. The noise level was almost unchanged, and the peak noise level was only about 0.8 dB lower. As described above, the air passage members having various sizes and shapes shown in FIGS. 7 to 12 have been examined. The air passage members are usable, and can be selected based on the required characteristics, for example, by reducing the sound. become.
[0040]
Embodiment 3 FIG.
FIG. 13 is a side view of the blower of the present invention shown in FIG. The same reference numerals as those in the other drawings denote the same components. Reference numeral 18 denotes a front / rear wind direction plate. At this time, the first air passage member 3 is fixed together with the drive motor 1 to a motor attachment plate 11 attached to substantially the center of the main body back surface 15a. At this time, the position of the air passage member 3 is located substantially at the center of the outlet 104.
[0041]
FIG. 14 shows the first air passage member 3 of FIG. 13 brought close to the 5% propeller fan 2 having the vertical width of the air outlet 104. That is, the air passage member is shifted in the axial direction toward the 5 mm propeller fan as compared with FIG. At this time, the air volume and the noise value are almost the same as those in FIG.
[0042]
FIG. 15 shows the first air passage member 3 shown in FIG. 13 close to the 10% propeller fan 2 of the vertical width of the air outlet 104. That is, the air passage member is shifted in the axial direction toward the 10 mm propeller fan as compared with FIG. At this time, the air volume and the noise level are almost the same as those in FIG.
[0043]
FIG. 16 is a view in which the first air passage member 3 of FIG. 13 is brought close to the 15% propeller fan 2 of the vertical width of the air outlet 104. That is, the air passage member is shifted in the axial direction toward the 15 mm propeller fan as compared with FIG. At this time, the noise level was almost the same as in FIG. 13, but the air volume was reduced by about 2%. From the above, it is possible to maintain the desired characteristics as long as it is within this range, that is, within a range shifted by about 15% from the vicinity of the center of the outlet. The axial position of the air passage member is related to the arrangement of the front and rear wind direction plates 18 so as to obtain a smooth blowout, or is configured to be shifted according to the attachment structure of the air passage member, and an allowable range that does not affect the characteristics. May be arranged within.
[0044]
【The invention's effect】
  According to the first aspect of the present invention, the propeller fan that is rotationally driven by the driving means and blows air, and is provided around the propeller fan, guides the air blow in the axial direction, and blows air from the vicinity of the end of the propeller fan to the outer peripheral direction. The air passage forming means for guiding the air passage and the air passage forming means as one side wall, blows air in the outer peripheral direction from one end, and keeps the closed space with the other end face facing the blowing direction at a distance from the propeller fan. A fan casing connected to the side wall so as to form, and the fan casing housed in the fan casing is provided to face the propeller fan at a predetermined interval in the axial direction of the propeller fan and guides the air flow between the side wall and the outer periphery. A fan case between a thin plate-like air passage member forming the diffuser air passage and the other side wall provided on the surface facing the thin plate-like air passage member and the side wall. Comprising a blow-out port formed in a width direction of the fan casing discharged from near the outer periphery of the grayed outside guide the air blown from the diffuser air path, and the air passage membershapeThe propeller fanThe shape on the outlet side and the enclosed space side was changed from the center, and the area on the enclosed space side was made smaller than the area on the outlet side, and the width direction dimension was suppressed.SoThe air blower can be downsized with a simple structure, and the air volume and speed can be secured.BlowerTo getit can.
[0046]
  Claim2According to the invention, the propeller fan that is rotationally driven by the driving means and blows air, and the wind that is provided around the propeller fan, guides the air blow in the axial direction, and guides the air blow from the vicinity of the end of the propeller fan to the outer peripheral direction. The passage forming means and the air passage forming means are used as one side wall, and an air outlet for blowing the air in the outer peripheral direction is provided at one end and faces the air outlet.otherA fan casing connected to a side wall whose end surface is semicircular so as to maintain a distance from the propeller fan, and is stored in the fan casing and faces the propeller fan at a predetermined interval in the axial direction of the propeller fan. A thin plate-like air passage member that forms a diffuser air passage that guides air flow in the outer peripheral direction between the thin plate-like air passage member and the other side wall provided on the surface facing the side wall. Between the side wall and the outer periphery of the fan casing, air from the diffuser air passage is guided and blown out from the outlet, and the shape of the air passage member passes through the center of the propeller fan and intersects the side wall at a right angle with the side wall. When determining the vertical center line to be parallel, the shape on the side close to the outlet is larger than the propeller fan and farther from the outlet, with the horizontal center line as the boundary. Since the shape is determined with two points on the horizontal center line and one point larger than the outer shape of the drive means on the side farther from the outlet on the vertical center line, and these three points are connected, the size of the blower can be reduced without significantly affecting the blowing performance. Can do.
[0047]
  Claim3According to the invention, the size in the width direction of the air passage member is 0.7 to 1.05 times the outer diameter size of the blades of the propeller fan, and the size in the width direction of the fan casing is 1.2 to 1.0. Since it is set to 1.25 times, a product configuration that can reduce the size of the blower body while maintaining the blowing performance, and can incorporate more blowers with a certain product size and increase the amount of blown air becomes possible.
[0048]
  Claim4According to the invention, since the attachment position in the axial direction of the air passage member is attached to a position deviated from the center of the air outlet, a convenient position is arbitrarily determined without deteriorating the air blowing performance. I can do things.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a blower according to an embodiment of the present invention.
FIG. 2 is a front view showing a state where a decorative grill of the blower according to the embodiment of the present invention is removed.
FIG. 3 is a side sectional view of a blower according to an embodiment of the present invention.
FIG. 4 is a front view showing a state where a decorative grill of the blower according to the embodiment of the present invention is removed.
5 is a front view showing a state in which the inner drive motor and the first air passage member in FIG. 2 are extracted. FIG.
FIG. 6 shows a wind speed distribution diagram of air blown by a blower according to an embodiment of the present invention, where (a) is according to the present invention, (b) is according to a conventional propeller fan type, and (c) is according to the prior art. It is a figure which shows what is based on a crossflow blade type | formula, respectively.
FIG. 7 is a front view showing a state in which a decorative grill of a blower according to another embodiment of the present invention is removed.
FIG. 8 is a front view showing a state in which a decorative grill of a blower according to another embodiment of the present invention is removed.
FIG. 9 is a front view showing a state in which a decorative grill of a blower according to another embodiment of the present invention is removed.
FIG. 10 is a front view showing a state in which a decorative grill of a blower according to another embodiment of the present invention is removed.
FIG. 11 is a front view showing a state in which a decorative grill of a blower according to another embodiment of the present invention is removed.
FIG. 12 is a front view showing a state in which a decorative grill of a blower according to another embodiment of the present invention is removed.
FIG. 13 is a side sectional view of a blower according to another embodiment of the present invention.
FIG. 14 is a side sectional view of a blower according to another embodiment of the present invention.
FIG. 15 is a side sectional view of a blower according to another embodiment of the present invention.
FIG. 16 is a side sectional view of a blower according to another embodiment of the present invention.
FIG. 17 is a side sectional view of a conventional blower.
FIG. 18 is a side sectional view of a conventional blower.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drive motor, 2 Propeller fan, 3 1st air path member, 5 Bell mouth casing, 9 Centrifugal diffuser air path, 10 Centrifugal diffuser air path back space, 11 Motor mounting plate, 14 Cosmetic grill, 15 Main body, 16 Fan casing 17 left and right wind direction plates, 18 front and rear wind direction plates, 22 blade fixing nuts, 23 motor fixing screws, 27 scroll casing rear space, 30 bell mouth, 31 smooth air path, 32 multilayer parallel nozzles, 33 guides, 34 roundness, 35 blower Housing, 36 motor mounting plate, 101 blower body, 102 body mounting bracket, 103 air inlet, 104 air outlet, 105 upper wall surface of the doorway, 106 open doorway, 107 ceiling surface, 108 floor surface, 109 no opening Wall, 110 suction space, 113 crossflow fan, 114 drive motor, 115 fan casing, 116 wind direction plate.

Claims

A propeller fan that is rotationally driven by the driving means and blows air, and an air passage forming means that is provided around the propeller fan and guides the air flow in the axial direction, and guides the air flow from the vicinity of the end of the propeller fan to the outer peripheral direction, The air passage forming means is used as one side wall, blows air in the outer circumferential direction from one end, and the other side surface opposed to the blowing direction keeps a distance from the propeller fan to form a closed space. A diffuser air passage is provided between the connected fan casing and the propeller fan that is housed in the fan casing and is opposed to the propeller fan at a predetermined interval in the axial direction of the propeller fan, and guides air flow in the outer circumferential direction. The fan casing is formed between the thin plate-like air passage member to be formed and the other side wall provided on the surface facing the thin plate-like air passage member and the side wall. Comprising a outlet from near the outer periphery is provided in the width direction of the fan casing to blow to the outside leads to the blower than the diffuser air path of, and the shape of the air passage member, the air outlet side from the center of the propeller fan The blower is characterized in that the shape on the closed space side is changed, the area on the closed space side is made smaller than the area on the blowout side, and the size in the width direction is suppressed .

A propeller fan that is rotationally driven by the driving means and blows air, and an air passage forming means that is provided around the propeller fan and guides the air flow in the axial direction, and guides the air flow from the vicinity of the end of the propeller fan to the outer peripheral direction, the air passage forming means and one of the side walls, the outer circumferential direction of the provided at one end of the air outlet for blowing out the blow, semicircular surface of the other end facing the outlet as one holding a distance between the propeller fan A fan casing connected to the side wall having a shape and a fan casing housed in the fan casing and provided in the axial direction of the propeller fan so as to be opposed to the propeller fan at a predetermined interval in the outer circumferential direction. and a thin plate-shaped air passage member forming a diffuser air path for guiding the off between the other side wall which is provided on the thin plate side wall which faces the air passage member Causes the vicinity of the outer periphery of the emission casing blown from the air outlet guides air blowing from the diffuser air path, the shape of the air duct member, the horizontal center line intersecting the center as the side wall and perpendicular to the propeller fan side wall When the vertical center line parallel to the air outlet is determined, the shape on the side near the air outlet is larger than the propeller fan and the shape on the side far from the air outlet is 2 on the horizontal center line. A blower characterized in that one point larger than the outer shape of the driving means is determined on the side farther from the air outlet on the vertical center line, and these three points are connected .

The size in the width direction of the air passage member is 0.7 to 1.05 times the outer diameter size of the blades of the propeller fan, and the size in the width direction of the fan casing is 1.2 to 1.25 times. The blower according to claim 1 or 2, characterized in that .

The blower according to any one of claims 1 to 3, wherein the axial direction attachment position of the air passage member is attached between a position near a center of the blowout port and a position shifted by a predetermined amount .