JP3548714B2

JP3548714B2 - Air conditioner

Info

Publication number: JP3548714B2
Application number: JP2000374661A
Authority: JP
Inventors: 貢一増田; 雅彦佐々木; 大輔齊藤; 拓也下川; 則年梅村
Original assignee: Toshiba Carrier Corp
Current assignee: Toshiba Carrier Corp
Priority date: 2000-12-08
Filing date: 2000-12-08
Publication date: 2004-07-28
Anticipated expiration: 2019-07-28
Also published as: JP2001193957A

Description

【０００１】
【発明の属する技術分野】
本発明は、たとえば天井埋込型の空気調和機に係り、特に各構成部品の組立構造の改良に関する。
【０００２】
【従来の技術】
近時、室内の大型リビング傾向に対処して、２方向吹出しによって室内の良好な温度分布を確保するようにした空気調和機が知られている。
この種の空気調和機は、天井に取付けられる室内ユニットに、２つの室内熱交換器が設けられ、これら室内熱交換器にそれぞれ対向して２つの室内送風機が配置される。
【０００３】
各室内送風機は、ユニット本体に設けられる１つの吸込口から被空調室内の空気をユニット本体内に取込んだ上で、それぞれ対向する室内熱交換器を導通させ、この吹出側にそれぞれ設けられる吹出口から被空調室へ吹出し案内するように構成されている。
【０００４】
【発明が解決しようとする課題】
ところで、この種の空気調和機においても、必要に応じて構成部品の保守点検や交換などの、メンテナンス作業を行わなくてはならない。この場合、室内ユニットの据付場所が天井であるので、その場で保守点検作業を行うには無理な姿勢をとらなければならず、非常に疲れる作業となる。したがって、その場で作業を行うのではなく、必要な部品を一旦取外して床面に置き、ここで保守点検作業できれば、作業性の点から非常に有利である。
【０００５】
ところが、従来の室内ユニットでは、本体内に収容配置される全ての構成部品を据付けたまま取外すことができない。ある程度の部品はそのままユニット本体内に残り、その部品が必要な場合はユニット本体ごと天井から下ろして作業を行うという不具合があった。
【０００６】
また、作業性にも問題があって、たとえば室内送風機は軸方向に長い横流ファンが用いられるのが普通であるが、ユニット本体に対する固定具を取外した状態で、手で保持しないと落下するような構成では、かえって作業がし難い。
すなわち、このような室内送風機では、固定具を取外しても、自然的に仮保持できる構成であれば、作業性の点でより良いことになる。
【０００７】
本発明は、上記事情に鑑みなされたものであり、その目的とするところは、ユニット本体内に配置される構成部品の、本体への締結方向を設定して、作業性の向上を図れる空気調和機を提供しようとするものである。
【０００８】
さらに本発明の目的とするところは、一対の室内送風機の配置構造を設定することにより、それぞれを構成するファンモータは同一回転方向でよく、部品点数の削減を得られる空気調和機を提供しようとするものである。
【０００９】
さらに本発明の目的とするところは、ドレンポンプの運転中に発生する磁気音を低減して、ユニット本体や室内熱交換器の磁化を防止する空気調和機を提供しようとするものである。
【００１０】
【課題を解決するための手段】
請求項１の発明の空気調和機は、下部側に開口部を備えたユニット本体と、このユニット本体内の上壁面の両側部にそれぞれ離間対向して設けられ、ユニット本体から垂下する片部とこの片部の下端縁に水平に折曲される片部からなる一対の熱交換器固定板およびユニット本体から垂下される板体であり内方側端縁は略ハの字状に折曲される折曲片部を有する一対の熱交換器支持板と、側面視でハの字状に傾斜して対向配置され両側部が端板固定板によって連結され一体化されて熱交換器支持板の折曲片部に当接されるとともに端板固定板が熱交換器固定板に固定手段を介して取付固定される一対の室内熱交換器と、熱交換器支持板にそれぞれ設けられるモータ受け部と、室内熱交換器の傾斜上部に対向して設けられユニット本体の上面壁に固定手段を介して取付け固定される一対のファンケーシングと、各ファンケーシング内に配置される一対の室内送風機をそれぞれ構成する横流ファンと、これら横流ファンの一端軸部を枢支する軸受けおよびモータ受け部に固定手段を介して取付け固定され横流ファンの他端軸部に連結されるファンモータを挟持支持するモータカバーとを具備し、一対の室内送風機のファンモータと軸受けの位置が互いに反対側になるよう配置され、かつ各構成部品を締結固定する固定手段の締結方向をユニット本体の開口部の方向と一致させたことを特徴とする。
【００１１】
請求項２の発明の空気調和機は、下部側に開口部を備えたユニット本体と、このユニット本体内の上壁面の両側部にそれぞれ離間対向して設けられユニット本体から垂下する片部とこの片部の下端縁に水平に折曲される片部からなる一対の熱交換器固定板およびユニット本体から垂下される板体であり内方側端縁は略ハの字状に折曲される折曲片部を有する一対の熱交換器支持板と、側面視でハの字状に傾斜して対向配置され両側部が端板固定板によって連結され一体化されて上記熱交換器支持板の折曲片部に当接されるとともに端板固定板が熱交換器固定板に固定手段を介して取付固定される一対の室内熱交換器と、各熱交換器支持板の外面側に下端縁から中途部まで切欠部が設けられこの切欠部の上端縁に半円状をなすフランジ部が形成されるモータ受け部と、このモータ受け部のフランジ部に対向して半円状に形成されるフランジ部を備えモータ受け部に固定手段を介して取付け固定されるモータカバーと、室内熱交換器の傾斜上部にそれぞれ対向して設けられユニット本体に固定手段を介して取付け固定される一対のファンケーシングと、モータ受け部とモータカバーの各フランジ部により挟持される一対の室内送風機を構成するファンモータと、このファンモータに連結されファンケーシング内に配置されるとともに、その一端軸部がこのファンケーシングに取着される軸受けに枢支され、他端ボス部が上記ファンモータのブラケット部に嵌挿された横流ファンとを具備し、一対の室内送風機のファンモータと軸受けの位置が互いに反対側になるよう配置されかつ各構成部品を締結固定する固定手段の締結方向をユニット本体の開口部の方向と一致させたことを特徴とする。
【００１２】
請求項３として、請求項１および請求項２のいずれかに記載の空気調和機において一対の室内熱交換器は、端板固定板が熱交換器固定板から固定手段の締結を解除された際に、ユニット本体に吊持されて保持される保持装置を備えたことを特徴とする。
【００１３】
請求項４の発明の空気調和機は、下部側に開口部を備えたユニット本体と、このユニット本体内の上壁面の両側部にそれぞれ離間対向して設けられユニット本体から垂下する片部とこの片部の下端縁に水平に折曲される片部からなる一対の熱交換器固定板およびユニット本体から垂下される板体でありその内方側端縁は略ハの字状に折曲される折曲片部を有する一対の熱交換器支持板と、側面視でハの字状に傾斜して対向配置しその両側部が端板固定板によって連結され互いに一体化されて熱交換器支持板の折曲片部に当接されるとともに端板固定板を熱交換器固定板に固定手段を介して取付固定される一対の室内熱交換器と、各熱交換器支持板の外面側に下端縁から中途部まで切欠部が設けられこの切欠部の上端縁に半円状をなすフランジ部が形成されるモータ受け部と、このモータ受け部のフランジ部に対向して半円状に形成されるフランジ部を備えモータ受け部に固定手段を介して取付け固定されるモータカバーと、室内熱交換器の傾斜上部にそれぞれ対向して設けられユニット本体に固定手段を介して取付け固定される一対のファンケーシングと、モータ受け部と上記モータカバーの各フランジ部により挟持されるファンモータと、各ファンケーシング内に配置され内側に一端軸部がこのファンケーシングに取着される軸受けに枢支され、他端ボス部がファンモータのブラケット部に嵌挿された横流ファンとより構成し、このファンモータと軸受けの位置が互いに反対側に設けられた一対の室内送風機と、ユニット本体の開口部から取外し可能に装着された電気部品箱と、ユニット本体の隅部に形成されたドレンポンプ取付けベースと、このドレンポンプ取付けベースに開口部より取外し可能に装着され、周囲に磁気音低減板が並設され、もしくは囲繞されるドレンポンプとを具備することを特徴とする。
【００１４】
このような課題を解決する手段を採用することにより、空気調和機本体内に収容配置される構成部品の、本体への締結方向および構成部品相互の締結方向を設定して作業性の向上を図れ、一対の室内送風機の配置構造を設定することによりそれぞれを構成するファンモータは同一回転方向でよく部品点数の削減を得られ、ドレンポンプの運転中に発生する磁気音を低減してユニット本体や室内熱交換器の磁化を防止する。
【００１５】
【発明の実施の形態】
以下、本発明の一実施の形態を、図面を参照して説明する。
【００１６】
図１に示すような、空気調和機の室内ユニットの外観構成となっている。
図中１は空気調和機本体であるユニット本体であり、吊持具２を介して垂設される。この下面側は開口部となっていて、天井パネル部３により開閉自在に閉塞される。
【００１７】
天井パネル部３は、ここでは図示しない天井と同一面をなし、被空調室Ｒ内に露出する。すなわち、ユニット本体１は天井内に埋込状態で取付けられる。
天井パネル部３の両側部を除く中央に吸込口４が設けられ、両側に、互いに異なる方向へ向けられる吹出口５ａ，５ｂが設けられる。
【００１８】
ユニット本体１の一側部には、中途部から２方向に分岐される冷媒管Ｐが接続され、この近傍にはドレン管６が接続される。この近傍には、端子板をカバーするコネクタカバー７が設けられる。
【００１９】
図２に示すように、天井パネル部３において、ここでは吸込口を備えた図示しない吸込グリルが取外し自在となっている。この状態で、ユニット本体１の開口部８を介して内部に収容配置される電気部品箱３２を挿脱自在である。
【００２０】
図３に示すように、室内ユニットの構成部品を分解して示す。図において左側部が、実際には下部、右側部が実際には上部である。以下、実際の取付状態をもとに説明する。
【００２１】
図において右側部に示す上記ユニット本体１は、下部側に開口部８を備えている。その右側壁は別位置に示し、内部状態を露出して示す。
ユニット本体１内面側で、かつ上面壁には、熱交換器固定板１８、熱交換器支持板１９、モータ受け部２０、ドレンポンプ取付けベース２１、ケーシング固定ねじ受け２２等が設けられる。なお、これら部品のみ、ユニット本体１に対して、たとえば溶接手段など、直接取付固定しても支障がない。
【００２２】
上記熱交換器固定板１８と熱交換器支持板１９は、ユニット本体１の両側部に、一対離間対向して設けられる。熱交換器固定板１８は、ユニット本体１から垂下する片部と、この片部の下端縁に水平に折曲される片部からなる。熱交換器支持板１９は、ユニット本体１から垂下される板体であり、その内方側端縁は略ハの字状に折曲される折曲片部を有する。
【００２３】
上記モータ受け部２０は、それぞれの熱交換器支持板１９の外面側に、たとえばスポット溶接などの手段で一体に固着される。上記ドレンポンプ取付けベース２１は、ユニット本体１の一側部にのみ設けられ、ケーシング固定ねじ受け２２は、ユニット本体１の略中央部に幅方向に離間して一対設けられる。
【００２４】
上記ドレンポンプ取付けベース２１には、ドレンポンプ２３が取付固定される。このドレンポンプ２３をドレンポンプ取付けベース２１に取付固定するための固定手段である固定ねじは、その締結方向が、ユニット本体１の開口部８の方向と一致するよう設定される。
【００２５】
上記ケーシング固定ねじ受け２２には、固定手段である固定ねじ２５ａを介してファンケーシング２４が取付け固定される。このねじ２５ａの締結方向もユニット本体１の開口部８と一致するよう設定される。
【００２６】
上記ファンケーシング２４内に、室内送風機１４ａ，１４ｂを構成する横流ファン２６が配置され、この一端軸部がケーシング２４に取着されるゴム軸受け２７に枢支され、他端ボス部がファンモータ２８のブラケット部２８ａに嵌挿される。
【００２７】
互いの室内送風機１４ａ，１４ｂにおいて、ファンモータ２８とゴム軸受け２７の位置は、互いに反対側に設けられる。
これはファンモータ２８を同一側に設けた場合、ファンモータ２８の互いの回転方向を逆にしなければならず、２種類のファンモータを用意することになり、構成部品が増えてしまうからである。
【００２８】
各ファンモータ２８は、熱交換器支持板１９に一体に設けられる上記モータ受け部２０と、後述するモータカバー２９とで挟持され、支持される。
このファンモータ２８の取付構造は、図４および図５に詳しい。
【００２９】
上記モータ受け部２０には、下端縁から中途部まで切欠部９が設けられており、この切欠部９の上端縁に、上半分の半円状をなすフランジ部２０ａが設けられる。上記モータカバー２９には、下半分の半円状をなすフランジ部２９ａが設けられる。それぞれのフランジ部２０ａ，２９ａは、ファンモータ２８の両側面に突出するブラケット部２８ａと同一の曲率半径を有する。
【００３０】
モータカバー２９はモータ受け部２０に、固定手段である固定ねじ２５ｂにより取付固定されていて、この固定ねじの締結方向は、ユニット本体１の開口部８の方向と一致するよう設定される。
【００３１】
そして、モータ受け部２０にモータカバー２９を取付固定した状態で、互いのフランジ部２０ａ，２９ａが当接して円形状をなし、これら相互でファンモータ２８のブラケット部２８ａを両側から挟持して、ファンモータ２８の固定支持をなしている。
【００３２】
上記モータ受け部２０の切欠部９下端には、側方に突出する突起部２０ｂが一体に設けられる。上記モータカバー２９をモータ受け部２０から取外した状態で、ファンモータ２８のブラケット部２８ａをモータ受け部２０に挿脱するときは上記突起部２０ｂを避け、この分だけ位置をずらせながら行う。
【００３３】
ただし、ファンモータ２８の切欠部９における自然落下的な動作では、この下端においてブラケット部２８ａが突起部２０ｂに掛止して、ファンモータ２８を引き抜く強制力を付与しない限り、その位置を止まる。
すなわち、送風機１４ａ，１４ｂの固定手段を除去した状態での、これらの自然落下を突起部２０ｂで防止でき、安全性がよい。
【００３４】
再び図３に示すように、室内送風機１４ａ，１４ｂは、室内熱交換器１３ａ，１３ｂの傾斜上部に沿って配置される。
これら室内熱交換器１３ａ，１３ｂは、側面視でハの字状に傾斜しており、その両側部において端板固定板３０によって連結固定され、互いに一体化された状態にある。
【００３５】
また、これら室内熱交換器１３ａ，１３ｂおよび室内送風機１４ａ，１４ｂに沿うように、ノーズ１５ａ，１５ｂが熱交換器支持板１９に固定ねじを介して固定される。
【００３６】
図４および図６に示すように、室内熱交換器１３ａ，１３ｂ相互を連結固定する端板固定板３０の最頂部には、取付用片部３０ａが設けられていて、先に図３で示した熱交換器固定板１８の水平片部に、固定手段である固定ねじ２５ｃを介して取付固定される。
【００３７】
このようにして、一体化された室内熱交換器１３ａ，１３ｂがユニット本体１に着脱自在に取付固定されるのだが、取付けられた状態で、これらの両側端部の端板１２が上記熱交換器支持板１９の折曲片部に当接する。
すなわち、折曲片部の傾斜と熱交換器１３ａ，１３ｂの傾斜が一致しており、熱交換器支持板１９は熱交換器のユニット本体１幅方向の変位を規制する。
【００３８】
また、上記モータカバー２９の一側端にはフランジ部１０が設けられていて、一方の室内熱交換器１３ｂの一側端に設けられる端板１２に、固定手段である固定ねじ２５ｄを介して取付固定される。この固定ねじ２５ｄの締結方向も、ユニット本体１の開口部８の方向と略一致するよう設定される。
【００３９】
結果として、ユニット本体１に熱交換器支持板１９が一体に取付固定され、この熱交換器支持板１９のモータ受け部２０にモータカバー２９が取付固定され、さらにこのカバーに熱交換器１３ｂの端板１２が取付固定されるので、特に室内熱交換器１３ａ，１３ｂの取付固定にともなう剛性の確保を得られる。
【００４０】
一体化された室内熱交換器１３ａ，１３ｂの一方の端板固定板３０には、ユニット本体１から吊持される紐５５のフックが掛止される。一方、図７に示すように、ユニット本体１の一側壁には、配管用開口部５１が設けられており、ここから各室内熱交換器に接続される冷媒管Ｐが外部に突出する。
【００４１】
上記配管用開口部５１は、あらかじめ大きく形成されており、配管作業が終了した後、ここに配管カバー５２が取着される。すなわち、冷媒管Ｐを配管用開口部５１に挿通した状態で、冷媒管以外の余分な開口部５１は配管カバー５２によって完全に閉成される。
【００４２】
そして、メンテナンス時など、開口部８側から固定ねじ２５ｃを外し、各熱交換器固定板１８から室内熱交換器１３ａ，１３ｂを取外した状態でも、なお熱交換器の一側部は紐５５を介してユニット本体１に吊持される。すなわち、紐５５は保護装置をなす。さらに、配管カバー５２を外しても、室内熱交換器１３ａ，１３ｂの他側部は、ここから延出する冷媒管Ｐが配管用開口部５１下端縁に掛止される。
【００４３】
このように、一体化された室内熱交換器１３ａ，１３ｂに対する固定手段を除去した状態でも、なお熱交換器はユニット本体１に仮保持をなし、一挙に脱落に至らないから、作業性がよい。
【００４４】
再び図３に示すように、これら室内熱交換器１３ａ，１３ｂの下部に、ドレンパン５０が設けられる。このドレンパン５０は、先に説明した天井パネル部３の所定位置に嵌着されており、このパネル部ごとユニット本体１から着脱されることになる。
【００４５】
このドレンパン５０は、室内熱交換器１３ａ，１３ｂから滴下するドレンは勿論のこと、後述するクロスパイプやリターンベンド等からのドレンも捕集するために、中央部が開口する枠状になっており、上記吸込口４および吹出口５ａ，５ｂと対向する部分を有しない。一部には、上記ドレンポンプ２３の吸込部が配置される溜め部５１が設けられる。
【００４６】
このようにして構成される室内ユニットは、吸込口４から、ユニット本体１内を介して各吹出口５ａ，５ｂに至る２系統の通風路が形成される。
なお説明すれば、それぞれの通風路は、被空調室Ｒの熱交換空気を吸込口４から本体１内に取入れて室内熱交換器１３ａ，１３ｂを導通させ、室内送風機１４ａ，１４ｂと吹出口５ａ，５ｂとの間のノーズ１５ａ，１５ｂによって案内し、吹出口５ａ，５ｂから再び被空調室Ｒ内へ吹出案内するものである。
【００４７】
ここでは、一方の吹出口５ａから吹出される熱交換空気は、被空調室Ｒの一部（ゾーンＡ）の方向に向かう。他方の吹出口５ｂから吹出される熱交換空気は、被空調室Ｒの他部（ゾーンＢ）の方向に向かう。
【００４８】
メンテナンスの際など、室内ユニットの構成部品を取外すには、はじめ天井パネル部３を取外し、開口部８を開放して一体化された室内熱交換器１３ａ，１３ｂ、ノーズ１５ａ，１５ｂ、モータカバー２９、室内送風機１４ａ，１４ｂを順次取外す。
【００４９】
また、これら部品を含め、ファンケース２４、電気部品箱３２、ドレンポンプ２３の構成部品全ての取外し方向を、開口部８方向と一致させたので、作業し易い。
取外した構成部品は、床面に下ろし、ここで点検修理作業を行う。したがって、高所にある状態での作業ではないから、作業性がよい。
【００５０】
必要な作業が終了したら、逆の手順で構成部品を組み立て、かつ取付ける。このときの固定ねじの締結方向が開口部８方向と一致することには変わりがなく、作業性がよい。
【００５１】
図８は、このような室内ユニットを備えた空気調和機の冷凍サイクル回路および制御回路の構成である。
圧縮機３３の吐出部が四方弁３４を介して室外熱交換器３５に接続される。この室外熱交換器３５は膨張弁３６を介して２分割された上記室内熱交換器１３ａ，１３ｂに接続される。これら室内熱交換器１３ａ，１３ｂから四方弁３４を介して圧縮機３３の吸込部に接続される。
【００５２】
なお、互いの室内熱交換器１３ａ，１３ｂは、それぞれの中間部がクロスパイプ３７ａ，３７ｂによって連通され、冷媒は、一方の熱交換器の半分の部分を導通したところで、他方の熱交換器を導通するよう設定される。これにより、各熱交換器の温度の平均化を図っている。
それぞれのクロスパイプ３７ａ，３７ｂには、ここを導通する冷媒の温度を熱交換器温度としてとらえる温度センサ３８ａ，３８ｂが設けられる。
【００５３】
冷房運転時には、圧縮機３３から圧縮冷媒が吐出され、図中実線矢印に示す方向に導かれて冷房サイクルが構成される。このとき、室外熱交換器３５が凝縮器、かつ室内熱交換器１３ａ，１３ｂが蒸発器として作用する。
【００５４】
暖房運転時には、圧縮機３３から圧縮冷媒が吐出され、図中破線矢印に示す方向に導かれて暖房サイクルが構成される。このとき、室外熱交換器３５が蒸発器、かつ室内熱交換器１３ａ，１３ｂが凝縮器として作用する。
【００５５】
図中４０は制御部であり、マイクロコンピュータおよびその周辺回路からなる。この制御部４０は、降圧用のトランス４１を介して、商用交流電源４２に接続される。
【００５６】
制御部４０に、上記温度センサ３８ａ，３８ｂ、四方弁３４、室外送風機３５Ａ、インバータ回路４３、タップ切換回路４４ａ，４４ｂ、室内温度センサ４５、およびリモートコントロール式の運転操作器（以下、リモコンと略称する）４６が接続される。
【００５７】
上記インバータ回路４３は、電源４２の電圧を整流し、それを制御部４０の指令に応じた周波数（および電圧）の交流に変換し、出力する。この出力は圧縮機３３のモータの駆動電源となる。
【００５８】
上記タップ切換回路４４ａ，４４ｂは、電源４２から各室内送風機１４ａ，１４ｂのファンモータ１４ａＭ，１４ｂＭにおける各速度タップに対する通電切換を行なう。
【００５９】
上記リモコン４６は、運転条件を設定する機能の他に、上記したゾーンＡおよびゾーンＢのそれぞれの局部制御モードのいずれか一方を選択するためのゾーン選択釦４６ａ，４６ｂを有する。
【００６０】
上記制御部４０は、次の機能手段を備えている。
（１）圧縮機３３の吐出冷媒を四方弁３４、室外熱交換器３５、膨張弁３６、室内熱交換器１３ａ，１３ｂおよび四方弁３４を通して圧縮機３３に戻し、冷房運転を実行する手段。
【００６１】
（２）圧縮機３３の吐出冷媒を四方弁３４、室内熱交換器１３ａ，１３ｂ、膨張弁３６、室外熱交換器３５および四方弁３４を通して圧縮機３３に戻し、暖房運転を実行する手段。
【００６２】
（３）運転時、室内温度センサ４５の検知温度（室内温度）Ｔａとリモコン４６での設定温度Ｔｓとの差に応じてインバータ回路４３の出力周波数（圧縮機の運転周波数）を制御する手段。
【００６３】
（４）リモコン４６のゾーン選択釦４６ａ，４６ｂがいずれも操作されない通常制御モードでは、室内送風機１４ａ，１４ｂの風量をリモコン４６の操作に応じた互いに同じ値（強，弱，微の３段階）に設定する手段。
【００６４】
（５）ゾーン選択釦４６ａ，４６ｂの操作に応じてゾーンＡ，Ｂのそれぞれ局部制御モードのいずれか一方を選択し、それに応じて室内送風機１４ａ，１４ｂの風量比率を変化させる手段。
【００６５】
（６）温度センサ３８ａ，３８ｂの検知温度のうち、いずれか一方の検知温度を運転モードに応じて選択する手段。
（７）選択される検知温度に応じて室内送風機１４ａ，１４ｂの風量を制御する手段。
【００６６】
つぎに、図９のフローチャートとともに、室内送風機１４ａ，１４ｂの風量制御を説明する。
冷暖房いずれの運転中も、温度センサ３８ａ，３８ｂにより室内熱交換器１３ａ，１３ｂの温度が検知され、その検知温度に応じて室内送風機１４ａ，１４ｂの風量が制御される。
【００６７】
すなわち、温度センサ３８ａ，３８ｂの断線検知など、各センサが正常か否かを判定される。各センサ３８ａ，３８ｂが共に正常であれば、検知温度Ｔ１，Ｔ２のいずれか一方が運転モードに応じて選択され、その選択される検知温度に応じた風量制御が実行される。
【００６８】
各センサのどちらかに断線や短絡等の異常があれば、正常な方のセンサの検知温度が選択されて風量制御が実行される。
室内熱交換器１３ａ，１３ｂの温度を検知するこのセンサ３８ａ，３８ｂは、検知温度帯域が０〜６０℃という広範囲をカバーしなければならず、しかも毎回温度測定を行っているため、故障率が高い。
【００６９】
しかしながら、ここでは２個のセンサ３８ａ，３８ｂを用いているため、たとえいずれか一方のセンサが故障することがあっても、他方のセンサが正常である限り、風量制御を滞りなく行える。
【００７０】
以下は、各温度センサ３８ａ，３８ｂが共に正常であることを前提として説明する。
暖房運転モードでは、冷風吹出がなされると不快であるので、これを防止するため、上記検知温度Ｔ１，Ｔ２のいずれか一方が選択され、凝縮器温度Ｔとして取込まれる。
【００７１】
暖房開始時のように、検知温度Ｔ１，Ｔ２が低くて設定温度Ｔ０に達していない状況では、検知温度Ｔ１，Ｔ２のうち低い方が選択され、凝縮器温度Ｔとして取込まれる。
【００７２】
ここで、この凝縮器温度Ｔと冷風吹出防止用の設定温度Ｔｘとが比較されて、ＴがＴｘよりも低ければ、室内送風機１４ａ，１４ｂの速度タップが共に下げられる。
【００７３】
このように検知温度Ｔ１，Ｔ２のうちの低い方を凝縮器温度Ｔとして取込み、その凝縮器温度Ｔが設定値Ｔｘを下回る場合は、各室内送風機１４ａ，１４ｂの風量を共に停止や削減することにより、不快な冷風吹出を確実に防止できる。
【００７４】
ところで暖房運転では、風量の少ない方の室内熱交換器の温度が上昇し、高圧側圧力の上昇を招くことがある。
そこで、検知温度Ｔ１，Ｔ２が設定温度Ｔ０以上に上昇した後で、検知温度Ｔ１，Ｔ２のうちの高い方が選択され、それが凝縮器温度として取込まれる。この凝縮器温度Ｔと高圧側圧力に対する異常上昇防止用の設定値Ｔｒとが比較され、ＴがＴｒよりも高ければ、圧縮機３３の運転周波数（インバータ回路４３の出力周波数）を低減するレリース制御が実行される。
【００７５】
このレリース制御に際しては、室内送風機１４ａ，１４ｂの速度タップが共に上げられて、凝縮器温度Ｔの低減が促進される。すなわち、高圧側圧力の異常上昇を速やかに抑制することができる。
【００７６】
冷房運転では、風量の少ない方の室内熱交換器が温度降下し、その温度降下した室内熱交換器が凍結する虞れがある。
そこで、冷房運転モードでは、室内熱交換器１３ａ，１３ｂの凍結を防止すべく、検知温度Ｔ１，Ｔ２のうちの低い方が選択され、それが蒸発器温度Ｔとして取込まれる。
【００７７】
この蒸発器温度Ｔと凍結防止用の設定値Ｔｚとが比較され、ＴがＴｚよりも低ければ、室内送風機１４ａ，１４ｂの速度タップが共に上げられる。
このように検知温度Ｔ１，Ｔ２のうちの低い方を蒸発器温度Ｔとして取込み、その蒸発器温度Ｔが設定値Ｔｚを下回る場合は、室内送風機１４ａ，１４ｂの風量を増大することにより、室内熱交換器１３ａ，１３ｂの凍結を確実に防止できる。
【００７８】
なお、上記実施例においては、各温度センサ３８ａ，３８ｂのどちらかに異常があれば、正常な方の検知温度を選択して風量制御を実行するようにしたが、これに限定されるものではなく、どちらかに異常があったとき、速度タップを固定にして、各送風機の風量を固定にしてもよい。
【００７９】
上記実施例においては、暖房時の冷風吹出防止制御で、検知温度Ｔ１，Ｔ２のうちの低い方を選択して風量を制御したが、これに限定されるものではなく、各検知温度Ｔ１，Ｔ２と冷風吹出防止用の設定値Ｔｘとを比較し、これら比較結果に応じて各室内送風機１４ａ，１４ｂの風量を個別に制御してもよい。
【００８０】
上記実施例においては、速度タップを切換えることで室内送風機の風量を変化させるようにしたが、これに限定されるものではなく、たとえば室内送風機駆動用のインバータ回路を設け、このインバータ回路の出力周波数を制御することにより、室内送風機の風量を無段階に変化させてもよい。
【００８１】
図１０に、平面視で示すように、ドレンポンプ２３はユニット本体１の隅部に配置されるが、運転にともなってこのモータ部から磁界が発生し、モータ部の近傍にある板金からなる本体や熱交換器が磁化し、大なる磁気音および磁気振動が発生してしまう。磁気音は、２ｎｆとして表される。（ｎ：１，２，３…、ｆ：電源周波数）
このような磁気音の低減をなすために、たとえば図１１（Ａ），（Ｂ）に示す手段を採用するとよい。
図１１（Ａ）のものは、ドレンポンプ２３の両側に磁化材料、たとえば鋼板などからなる磁気音低減板５３ａ，５３ａを並設する。図１１（Ｂ）のものは、ドレンポンプ２３の周囲を同じ磁化材料、たとえば鋼板などからなる磁気音低減板５３ｂで囲繞する。
【００８２】
ドレンポンプ２３の運転中に、このモータ部から発生する磁気音は、それぞれの磁気音低減板５３ａ，５３ｂによって低減される。すなわち、ドレンポンプ２３のモータ部の回転磁界を上記低減板内で減衰させるので、本体や熱交換器が磁化し、大なる磁気音および磁気振動が発生することもない。
ドレンポンプ２３の性能を何ら損なうことがなく、また特別の仕切板は不要で、磁気音の低減を可能とする。
【００８３】
図１１（Ａ）の磁気音低減板５３ａを備えた場合の測定結果を、図１２（Ａ）に示す。条件は、ドライ（除湿）風量で、ドレンポンプ２３を５０Ｈｚ、２００Ｖで空転状態とし、マイクの位置をドレンポンプ２３の下方１０ｃｍの位置に設定した。
従来のアルミニウム板でドレンポンプを仕切ったものと比較して、６．２ｄＢの低減が得られた。
【００８４】
図１１（Ｂ）の磁気音低減板５３ｂを備えた構成の場合の測定結果を、図１２（Ｂ）に示す。条件は、図１１（Ａ）の場合と同一である。
従来のアルミニウム板でドレンポンプを仕切ったものと比較して、１０．７ｄＢの低減が得られた。
【００８５】
上記実施例では、天井面に取付ける、いわゆる天カセタイプの空気調和機に適用して説明したが、これに限定されるものではなく、２つの室内熱交換器を有する壁掛け形にも応用できる。
さらに、本発明の要旨を越えない範囲内で種々の変形実施が可能なことは、勿論である。
【００８６】
【発明の効果】
以上説明したように本発明によれば、空気調和機本体内に収容配置される構成部品の、本体への締結方向および構成部品相互の締結方向を設定して、作業性の向上を図れるとともに、一対の室内送風機の配置構造を設定することにより、それぞれを構成するファンモータは同一回転方向でよく、部品点数の削減を得られる効果を奏する。
【００８７】
さらに本発明によれば、一対の室内送風機の配置構造を設定することにより、それぞれを構成するファンモータは同一回転方向でよく、部品点数の削減を得られる。
【００８８】
さらに本発明によれば、ドレンポンプの運転中に、このモータ部から発生する磁気音を低減して、ユニット本体や室内熱交換器の磁化を防止して、磁気音および磁気振動の発生を阻止する効果を奏する。
【図面の簡単な説明】
【図１】本発明の一実施の形態を示し、天井埋込型空気調和機の室内ユニットの斜視図。
【図２】同実施の形態の、室内ユニットの一部構成部品を取外した状態の斜視図。
【図３】同実施の形態の、室内ユニットの構成部品を分解した斜視図。
【図４】同実施の形態の、室内ユニットの一部の構成部品を取出し分解した斜視図。
【図５】同実施の形態の、室内送風機の取出しを説明する図。
【図６】同実施の形態の、室内ユニットの一部の構成部品を取出し分解した斜視図。
【図７】同実施の形態の、室内ユニットの一部構成部品を取外した状態の斜視図。
【図８】同実施の形態の、冷凍サイクルと制御回路の構成図。
【図９】冷房作用を説明するためのフローチャート図。
【図１０】他の実施の形態の、室内ユニットの底面図。
【図１１】（Ａ）は、ドレンポンプの防音構造を示す平面図。
（Ｂ）は、ドレンポンプのさらに異なる防音構造を示す平面図。
【図１２】（Ａ）は、図１１（Ａ）の防音構造における騒音防止特性を示す図。
（Ｂ）は、図１１（Ａ）の防音構造における騒音防止特性を示す図。
【符号の説明】
８…開口部、
１…空気調和機本体（ユニット本体）、
１９…熱交換器固定板、
１８…熱交換器支持板、
３０…端板固定板、
１３ａ，１３ｂ…室内熱交換器、
２０…モータ受け部、
２４…ファンケーシング、
１４ａ，１４ｂ…室内送風機、
２６…横流ファン、
２７…ゴム軸受け、
２５ａ，２５ｂ…固定手段（固定ねじ）、
２８…ファンモータ、
２９…モータカバー、
２８ａ…ブラケット部、
９…切欠部、
２０ｂ…突起部、
１０…フランジ部、
１２…（室内熱交換器の）端板。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, a ceiling-mounted air conditioner, and more particularly to an improvement in an assembly structure of each component.
[0002]
[Prior art]
2. Description of the Related Art Recently, there has been known an air conditioner adapted to cope with a tendency of a large living room to secure a favorable temperature distribution in the room by two-way blowing.
In this type of air conditioner, two indoor heat exchangers are provided in an indoor unit mounted on a ceiling, and two indoor blowers are arranged to face these indoor heat exchangers.
[0003]
Each of the indoor blowers takes air in the room to be air-conditioned into the unit main body from one suction port provided in the unit main body, and conducts the opposing indoor heat exchangers. The air outlet is guided to the room to be conditioned.
[0004]
[Problems to be solved by the invention]
By the way, even in this type of air conditioner, maintenance work such as maintenance inspection and replacement of components must be performed as necessary. In this case, since the installation location of the indoor unit is the ceiling, it is necessary to take an unreasonable posture to perform the maintenance and inspection work on the spot, which is extremely tired. Therefore, it is very advantageous from the viewpoint of workability if it is possible to remove necessary parts once and place them on the floor surface, and perform maintenance and inspection work here, instead of working on the spot.
[0005]
However, in the conventional indoor unit, it is not possible to remove all the components housed and arranged in the main body while installing the components. Some parts remain in the unit body as they are, and when the parts are needed, the whole unit body is lowered from the ceiling to perform the work.
[0006]
In addition, there is a problem in workability. For example, an indoor blower generally uses a cross flow fan that is long in the axial direction. With a simple configuration, it is rather difficult to work.
That is, in such an indoor blower, if it is configured to be able to temporarily hold naturally even if the fixing tool is removed, the workability will be better.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to set a direction in which components arranged in a unit main body are fastened to the main body to improve workability. Is to offer a machine.
[0008]
It is a further object of the present invention to provide an air conditioner in which the fan motors constituting each of the pair of indoor blowers can be arranged in the same rotational direction by setting the arrangement structure of the pair of indoor blowers, and the number of parts can be reduced. Is what you do.
[0009]
A further object of the present invention is to provide an air conditioner that reduces magnetic noise generated during operation of a drain pump and prevents magnetization of a unit body and an indoor heat exchanger.
[0010]
[Means for Solving the Problems]
The air conditioner according to the first aspect of the present invention includes a unit main body having an opening on a lower side, and a piece that is provided on both sides of an upper wall surface in the unit main body so as to be spaced apart from each other and hangs down from the unit main body. A pair of heat exchanger fixing plates consisting of one part bent horizontally at the lower end edge of the one part and a plate hanging down from the unit body, and the inner side edge is bent in a substantially U shape. A pair of heat exchanger supporting plates having bent pieces, and a pair of heat exchanger supporting plates, which are arranged opposite to each other by being inclined in a C-shape in a side view and both sides are connected and integrated by an end plate fixing plate. A pair of indoor heat exchangers that are in contact with the bent pieces and the end plate fixing plate is fixedly attached to the heat exchanger fixing plate via fixing means, and a motor receiving portion provided on each of the heat exchanger supporting plates. And installed on the upper wall of the unit body, facing the inclined upper part of the indoor heat exchanger. A pair of fan casings mounted and fixed via fixing means, a pair of cross flow fans disposed in each of the fan casings, and a bearing and a motor support for pivotally supporting one end shaft of these cross flow fans. And a motor cover that clamps and supports a fan motor connected to the other end shaft of the cross flow fan and fixed to the section via fixing means, and the positions of the fan motor and the bearing of the pair of indoor blowers are on opposite sides. And the fastening direction of the fixing means for fastening and fixing each component is matched with the direction of the opening of the unit body.
[0011]
An air conditioner according to a second aspect of the present invention includes a unit main body having an opening on a lower side, and a single piece provided on both sides of an upper wall surface in the unit main body so as to be spaced apart from each other and hanging down from the unit main body. A pair of heat exchanger fixing plates composed of one part bent horizontally at the lower end edge of the one part and a plate body hanging from the unit body, and the inner side edge is bent in a substantially U shape. A pair of heat exchanger support plates having bent piece portions, and a pair of heat exchanger support plates, which are arranged opposite to each other by being inclined in a U-shape in side view and both sides are connected and integrated by an end plate fixing plate. A pair of indoor heat exchangers, which are in contact with the bent pieces and the end plate fixing plate is fixedly attached to the heat exchanger fixing plate via fixing means, and a lower edge on the outer surface side of each heat exchanger support plate; A semi-circular flange is formed at the top edge of this notch A motor receiving portion, a motor cover having a flange portion formed in a semicircular shape opposed to the flange portion of the motor receiving portion and fixed to the motor receiving portion via fixing means; A pair of fan casings provided opposite to each other on the inclined upper portion and fixed to the unit body via fixing means, and a pair of fan motors constituting a pair of indoor blowers sandwiched by the flanges of the motor receiving portion and the motor cover; Connected to the fan motor and disposed in the fan casing, one end of which is pivotally supported by a bearing attached to the fan casing, and the other end of which is inserted into the bracket of the fan motor. And a configuration in which the fan motors and the bearings of the pair of indoor blowers are arranged on opposite sides of each other, and Characterized in that the fastening direction of the fastening means for fastening and fixing the article to match the direction of the opening of the unit body.
[0012]
According to a third aspect, in the air conditioner according to any one of the first and second aspects, the pair of indoor heat exchangers is configured such that when the end plate fixing plate is released from the heat exchanger fixing plate, fastening of the fixing means is released. And a holding device suspended from and held by the unit body.
[0013]
An air conditioner according to a fourth aspect of the present invention includes a unit main body having an opening on a lower side, and a single piece which is provided on both sides of an upper wall surface in the unit main body so as to be spaced apart from each other and hangs down from the unit main body. A pair of heat exchanger fixing plates each composed of one part bent horizontally at the lower end edge of the one part and a plate body hanging down from the unit body, and the inner side edge thereof is bent in a substantially U shape. And a pair of heat exchanger support plates having bent pieces, and are opposed to each other by being inclined in a C-shape when viewed from the side, and both sides thereof are connected by end plate fixing plates and integrated with each other to support the heat exchanger. A pair of indoor heat exchangers, which are in contact with the bent pieces of the plate and the end plate fixing plate is attached and fixed to the heat exchanger fixing plate via fixing means, and on the outer surface side of each heat exchanger support plate. A notch is provided from the lower edge to the middle, and a semicircular flange is formed at the upper edge of the notch. A motor cover having a semicircular flange opposed to the flange of the motor receiver, the motor cover being mounted and fixed to the motor receiver via fixing means, A pair of fan casings provided opposite to the inclined upper portion of the exchanger and attached to and fixed to the unit body via fixing means, a fan motor sandwiched between a motor receiving portion and each flange portion of the motor cover, One end shaft portion is disposed inside the fan casing and one end shaft portion is pivotally supported by a bearing attached to the fan casing, and the other end boss portion is constituted by a cross flow fan inserted into a bracket portion of the fan motor. A pair of indoor blowers in which the positions of the motor and the bearing are provided on opposite sides, and an electric component box detachably mounted from the opening of the unit body, A drain pump mounting base formed at a corner of the knit main body, and a drain pump that is detachably mounted on the drain pump mounting base from an opening and has a magnetic sound reduction plate juxtaposed or surrounded around the drain pump mounting base. It is characterized by doing.
[0014]
By adopting the means for solving such problems, it is possible to improve the workability by setting the fastening direction of the components housed and arranged in the air conditioner body to the body and the fastening directions of the components to each other. By setting the arrangement structure of the pair of indoor blowers, the number of parts of the fan motors constituting each of the fan motors can be reduced in the same rotation direction, and magnetic noise generated during operation of the drain pump can be reduced to reduce the unit body and the like. Prevents magnetization of indoor heat exchangers.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
The exterior configuration of the indoor unit of the air conditioner as shown in FIG.
In the figure, reference numeral 1 denotes a unit main body which is an air conditioner main body, which is vertically provided via a hanging fixture 2. This lower surface side is an opening, and is closed by the ceiling panel unit 3 so that it can be opened and closed.
[0017]
The ceiling panel section 3 has the same surface as a ceiling (not shown) and is exposed in the room to be air-conditioned R. That is, the unit main body 1 is mounted in the ceiling in an embedded state.
A suction port 4 is provided at the center of the ceiling panel 3 except for both sides, and blowout ports 5a and 5b are provided on both sides in directions different from each other.
[0018]
One side of the unit body 1 is connected to a refrigerant pipe P branched in two directions from an intermediate part, and a drain pipe 6 is connected near this. A connector cover 7 that covers the terminal board is provided near this.
[0019]
As shown in FIG. 2, in the ceiling panel portion 3, a suction grill (not shown) provided with a suction port is detachable here. In this state, the electric component box 32 housed and disposed inside through the opening 8 of the unit main body 1 can be inserted and removed.
[0020]
As shown in FIG. 3, the components of the indoor unit are exploded and shown. In the figure, the left part is actually the lower part, and the right part is actually the upper part. Hereinafter, a description will be given based on an actual mounting state.
[0021]
The unit main body 1 shown on the right side in the drawing has an opening 8 on the lower side. The right side wall is shown in a different position, exposing the internal state.
A heat exchanger fixing plate 18, a heat exchanger supporting plate 19, a motor receiving part 20, a drain pump mounting base 21, a casing fixing screw receiver 22, and the like are provided on the inner side of the unit body 1 and on the upper surface wall. It should be noted that there is no problem even if only these parts are directly attached and fixed to the unit body 1 by, for example, welding means.
[0022]
The heat-exchanger fixing plate 18 and the heat-exchanger support plate 19 are provided on both sides of the unit body 1 so as to face each other. The heat exchanger fixing plate 18 is composed of a part hanging down from the unit body 1 and a part bent horizontally at the lower end edge of the part. The heat exchanger support plate 19 is a plate that hangs down from the unit body 1, and has a bent piece portion whose inner side edge is bent in a substantially C shape.
[0023]
The motor receiving portions 20 are integrally fixed to the outer surface of each heat exchanger support plate 19 by means such as spot welding. The drain pump mounting base 21 is provided only on one side of the unit main body 1, and the casing fixing screw receiver 22 is provided at a substantially central portion of the unit main body 1 so as to be spaced apart in the width direction.
[0024]
A drain pump 23 is mounted and fixed to the drain pump mounting base 21. The fixing screw, which is fixing means for fixing the drain pump 23 to the drain pump mounting base 21, is set so that the fastening direction thereof matches the direction of the opening 8 of the unit body 1.
[0025]
A fan casing 24 is attached and fixed to the casing fixing screw receiver 22 via fixing screws 25a as fixing means. The fastening direction of the screw 25a is also set to match the opening 8 of the unit body 1.
[0026]
Inside the fan casing 24, a cross flow fan 26 constituting the indoor blowers 14a and 14b is arranged. One end shaft portion is pivotally supported by a rubber bearing 27 attached to the casing 24, and the other end boss portion is connected to a fan motor 28. Is inserted into the bracket portion 28a.
[0027]
In the indoor blowers 14a and 14b, the positions of the fan motor 28 and the rubber bearing 27 are provided on opposite sides.
This is because, when the fan motors 28 are provided on the same side, the rotation directions of the fan motors 28 must be reversed, so that two types of fan motors are prepared, and the number of components increases. .
[0028]
Each fan motor 28 is sandwiched and supported by the motor receiving portion 20 provided integrally with the heat exchanger support plate 19 and a motor cover 29 described later.
The mounting structure of the fan motor 28 is detailed in FIGS.
[0029]
The motor receiving portion 20 is provided with a notch 9 from a lower end edge to a middle portion, and an upper half edge of the notch 9 is provided with a flange portion 20a having a semicircular upper half. The motor cover 29 is provided with a lower semicircular flange portion 29a. Each of the flange portions 20a and 29a has the same radius of curvature as the bracket portion 28a protruding on both side surfaces of the fan motor 28.
[0030]
The motor cover 29 is attached and fixed to the motor receiving portion 20 by a fixing screw 25b as a fixing means, and the fastening direction of the fixing screw is set so as to match the direction of the opening 8 of the unit body 1.
[0031]
In a state where the motor cover 29 is attached and fixed to the motor receiving portion 20, the flange portions 20a and 29a contact each other to form a circular shape, and the bracket portion 28a of the fan motor 28 is sandwiched from both sides by The fan motor 28 is fixedly supported.
[0032]
At the lower end of the notch 9 of the motor receiving portion 20, a protrusion 20b projecting laterally is provided integrally. When the bracket portion 28a of the fan motor 28 is inserted into and removed from the motor receiving portion 20 in a state where the motor cover 29 is removed from the motor receiving portion 20, the bracket portion 28a of the fan motor 28 is removed while avoiding the projecting portion 20b and shifting the position by this amount.
[0033]
However, in the free fall operation of the notch 9 of the fan motor 28, the bracket portion 28a is hooked on the projection 20b at this lower end and stops at that position unless a forced force for pulling out the fan motor 28 is applied.
That is, when the fixing means of the blowers 14a and 14b are removed, these spontaneous drops can be prevented by the projections 20b, and the safety is good.
[0034]
As shown in FIG. 3 again, the indoor blowers 14a and 14b are arranged along the inclined upper portions of the indoor heat exchangers 13a and 13b.
These indoor heat exchangers 13a and 13b are inclined in a C-shape in side view, and are connected and fixed by end plate fixing plates 30 on both sides thereof, and are in a state of being integrated with each other.
[0035]
The nose 15a, 15b is fixed to the heat exchanger support plate 19 via a fixing screw along the indoor heat exchangers 13a, 13b and the indoor blowers 14a, 14b.
[0036]
As shown in FIGS. 4 and 6, a mounting piece 30a is provided at the top of the end plate fixing plate 30 for connecting and fixing the indoor heat exchangers 13a and 13b to each other. The heat exchanger fixing plate 18 is attached and fixed to a horizontal piece of the heat exchanger fixing plate 18 via fixing screws 25c as fixing means.
[0037]
In this manner, the integrated indoor heat exchangers 13a and 13b are detachably attached and fixed to the unit main body 1. In the attached state, the end plates 12 on both side ends of the heat exchangers 13a and 13b are connected to the heat exchanger. It comes into contact with the bent piece of the container support plate 19.
That is, the inclination of the bent piece portion and the inclination of the heat exchangers 13a and 13b match, and the heat exchanger support plate 19 regulates displacement of the heat exchanger in the unit body 1 width direction.
[0038]
A flange 10 is provided at one end of the motor cover 29, and is fixed to an end plate 12 provided at one end of one indoor heat exchanger 13b via a fixing screw 25d as fixing means. It is fixed. The fastening direction of the fixing screw 25d is also set to substantially match the direction of the opening 8 of the unit body 1.
[0039]
As a result, the heat exchanger support plate 19 is integrally fixed to the unit body 1, the motor cover 29 is fixed to the motor receiving portion 20 of the heat exchanger support plate 19, and the heat exchanger 13b is fixed to the cover. Since the end plate 12 is mounted and fixed, it is possible to secure the rigidity particularly when the indoor heat exchangers 13a and 13b are mounted and fixed.
[0040]
A hook of a string 55 suspended from the unit body 1 is hooked to one end plate fixing plate 30 of the integrated indoor heat exchangers 13a and 13b. On the other hand, as shown in FIG. 7, a piping opening 51 is provided on one side wall of the unit main body 1, from which a refrigerant pipe P connected to each indoor heat exchanger projects outside.
[0041]
The pipe opening 51 is formed large in advance, and a pipe cover 52 is attached thereto after the pipe work is completed. That is, in a state where the refrigerant pipe P is inserted into the pipe opening 51, the extra opening 51 other than the refrigerant pipe is completely closed by the pipe cover 52.
[0042]
Then, even when the fixing screws 25c are removed from the opening 8 side and the indoor heat exchangers 13a and 13b are removed from each heat exchanger fixing plate 18 at the time of maintenance or the like, one side of the heat exchanger still retains the string 55. And is suspended by the unit main body 1 via the main body. That is, the string 55 forms a protection device. Further, even if the pipe cover 52 is removed, the refrigerant pipes P extending from the other side of the indoor heat exchangers 13a and 13b are hooked to the lower edge of the pipe opening 51.
[0043]
As described above, even when the fixing means for the integrated indoor heat exchangers 13a and 13b are removed, the heat exchanger still temporarily holds the unit body 1 and does not fall off at once, so that the workability is good. .
[0044]
As shown in FIG. 3 again, a drain pan 50 is provided below the indoor heat exchangers 13a and 13b. The drain pan 50 is fitted at a predetermined position of the ceiling panel 3 described above, and the entire panel is detached from the unit body 1.
[0045]
The drain pan 50 has a frame shape with a central opening to collect not only drains dropped from the indoor heat exchangers 13a and 13b but also drains from a cross pipe and a return bend, which will be described later. , And does not have a portion facing the inlet 4 and the outlets 5a, 5b. A reservoir 51 in which a suction portion of the drain pump 23 is disposed is provided in a part.
[0046]
In the indoor unit configured in this manner, two ventilation paths are formed from the suction port 4 to the outlets 5a and 5b through the unit body 1.
In addition, if it explains, each ventilation path will take in the heat exchange air of the room R to be air-conditioned into the main body 1 from the inlet 4, and make the indoor heat exchangers 13a and 13b conductive, and the indoor blowers 14a and 14b and the outlet 5a , 5b, and the air is guided again from the outlets 5a, 5b into the air-conditioned room R.
[0047]
Here, the heat exchange air blown out from one of the outlets 5a is directed toward a part (zone A) of the room R to be air-conditioned. The heat exchange air blown out from the other outlet 5b is directed toward the other part (zone B) of the room R to be air-conditioned.
[0048]
In order to remove the components of the indoor unit for maintenance or the like, the ceiling panel 3 is first removed, the opening 8 is opened, and the integrated indoor heat exchangers 13a, 13b, nose 15a, 15b, motor cover 29 are removed. Then, the indoor blowers 14a and 14b are sequentially removed.
[0049]
In addition, since the removal directions of all the components including the fan case 24, the electrical component box 32, and the drain pump 23, including these components, are matched with the direction of the opening 8, the work is easy.
The removed component is lowered to the floor, where inspection and repair work is performed. Therefore, since the work is not performed at a high place, the workability is good.
[0050]
When the required work is completed, the components are assembled and mounted in the reverse order. At this time, the fastening direction of the fixing screw is consistent with the direction of the opening 8, and the workability is good.
[0051]
FIG. 8 shows a configuration of a refrigeration cycle circuit and a control circuit of an air conditioner including such an indoor unit.
The discharge part of the compressor 33 is connected to an outdoor heat exchanger 35 via a four-way valve 34. The outdoor heat exchanger 35 is connected via an expansion valve 36 to the indoor heat exchangers 13a and 13b divided into two parts. The indoor heat exchangers 13a and 13b are connected to the suction part of the compressor 33 via the four-way valve 34.
[0052]
The intermediate portions of the indoor heat exchangers 13a and 13b are communicated with each other by cross pipes 37a and 37b, and the refrigerant passes through one half of one of the heat exchangers. It is set to conduct. Thereby, the temperature of each heat exchanger is averaged.
Each of the cross pipes 37a and 37b is provided with a temperature sensor 38a or 38b for taking the temperature of the refrigerant flowing therethrough as a heat exchanger temperature.
[0053]
During the cooling operation, the compressed refrigerant is discharged from the compressor 33 and is guided in the direction indicated by the solid line arrow in the drawing to form a cooling cycle. At this time, the outdoor heat exchanger 35 functions as a condenser, and the indoor heat exchangers 13a and 13b function as evaporators.
[0054]
During the heating operation, the compressed refrigerant is discharged from the compressor 33, and is guided in the direction indicated by the dashed arrow in the drawing to form a heating cycle. At this time, the outdoor heat exchanger 35 functions as an evaporator, and the indoor heat exchangers 13a and 13b function as condensers.
[0055]
In the figure, reference numeral 40 denotes a control unit which comprises a microcomputer and its peripheral circuits. The control unit 40 is connected to a commercial AC power supply 42 via a step-down transformer 41.
[0056]
The control unit 40 includes the temperature sensors 38a and 38b, the four-way valve 34, the outdoor blower 35A, the inverter circuit 43, the tap switching circuits 44a and 44b, the indoor temperature sensor 45, and a remote control type operation controller (hereinafter abbreviated as a remote controller). ) 46 is connected.
[0057]
The inverter circuit 43 rectifies the voltage of the power supply 42, converts the rectified voltage into alternating current having a frequency (and voltage) according to a command from the control unit 40, and outputs the alternating current. This output serves as a drive power supply for the motor of the compressor 33.
[0058]
The tap switching circuits 44a and 44b switch power supply from the power supply 42 to each speed tap in the fan motors 14aM and 14bM of the indoor blowers 14a and 14b.
[0059]
The remote controller 46 has zone selection buttons 46a and 46b for selecting one of the above-described local control modes of the zone A and the zone B, in addition to a function of setting operating conditions.
[0060]
The control section 40 has the following functional means.
(1) Means for returning the refrigerant discharged from the compressor 33 to the compressor 33 through the four-way valve 34, the outdoor heat exchanger 35, the expansion valve 36, the indoor heat exchangers 13a and 13b, and the four-way valve 34, and performing a cooling operation.
[0061]
(2) Means for returning the refrigerant discharged from the compressor 33 to the compressor 33 through the four-way valve 34, the indoor heat exchangers 13a and 13b, the expansion valve 36, the outdoor heat exchanger 35, and the four-way valve 34, and performing a heating operation.
[0062]
(3) Means for controlling the output frequency (the operating frequency of the compressor) of the inverter circuit 43 in accordance with the difference between the temperature detected by the indoor temperature sensor 45 (indoor temperature) Ta and the temperature Ts set by the remote controller 46 during operation.
[0063]
(4) In the normal control mode in which none of the zone selection buttons 46a and 46b of the remote controller 46 is operated, the air volume of the indoor blowers 14a and 14b is set to the same value according to the operation of the remote controller 46 (three levels of strong, weak and fine). Means to set.
[0064]
(5) Means for selecting one of the local control modes of the zones A and B according to the operation of the zone selection buttons 46a and 46b, and changing the air volume ratio of the indoor blowers 14a and 14b accordingly.
[0065]
(6) Means for selecting one of the detected temperatures of the temperature sensors 38a and 38b according to the operation mode.
(7) Means for controlling the air volume of the indoor blowers 14a and 14b according to the detected temperature selected.
[0066]
Next, the air volume control of the indoor blowers 14a and 14b will be described with reference to the flowchart of FIG.
During any of the cooling and heating operations, the temperatures of the indoor heat exchangers 13a and 13b are detected by the temperature sensors 38a and 38b, and the air volumes of the indoor blowers 14a and 14b are controlled according to the detected temperatures.
[0067]
That is, it is determined whether or not each sensor is normal, such as detection of disconnection of the temperature sensors 38a and 38b. If both the sensors 38a and 38b are normal, one of the detected temperatures T1 and T2 is selected according to the operation mode, and the air volume control is executed according to the selected detected temperature.
[0068]
If any of the sensors has an abnormality such as a disconnection or a short circuit, the detection temperature of the normal sensor is selected and the air volume control is executed.
The sensors 38a and 38b for detecting the temperatures of the indoor heat exchangers 13a and 13b have to cover a wide range of the detected temperature range of 0 to 60 ° C., and since the temperature is measured every time, the failure rate is low. high.
[0069]
However, since the two sensors 38a and 38b are used here, even if one of the sensors fails, the air volume control can be performed without delay as long as the other sensor is normal.
[0070]
The following description is based on the premise that both the temperature sensors 38a and 38b are normal.
In the heating operation mode, it is uncomfortable when the cool air is blown out. To prevent this, one of the detection temperatures T1 and T2 is selected and taken in as the condenser temperature T.
[0071]
In a situation where the detected temperatures T1 and T2 are low and have not reached the set temperature T0, such as at the start of heating, the lower one of the detected temperatures T1 and T2 is selected and taken in as the condenser temperature T.
[0072]
Here, the condenser temperature T is compared with the set temperature Tx for preventing cool air blowing, and if T is lower than Tx, the speed taps of the indoor blowers 14a and 14b are both reduced.
[0073]
As described above, the lower one of the detected temperatures T1 and T2 is taken as the condenser temperature T, and when the condenser temperature T is lower than the set value Tx, the air flow of each of the indoor blowers 14a and 14b is stopped or reduced. Thereby, it is possible to reliably prevent unpleasant cold air blowing.
[0074]
By the way, in the heating operation, the temperature of the indoor heat exchanger having the smaller air volume rises, which may cause an increase in the high-pressure side pressure.
Then, after the detected temperatures T1 and T2 have risen to the set temperature T0 or higher, the higher one of the detected temperatures T1 and T2 is selected and taken in as the condenser temperature. The condenser temperature T is compared with a set value Tr for preventing abnormal rise with respect to the high-pressure side pressure. If T is higher than Tr, release control for reducing the operating frequency of the compressor 33 (the output frequency of the inverter circuit 43) is performed. Is executed.
[0075]
At the time of this release control, the speed taps of the indoor blowers 14a and 14b are both raised, and the reduction of the condenser temperature T is promoted. That is, abnormal rise of the high-pressure side pressure can be promptly suppressed.
[0076]
In the cooling operation, there is a possibility that the indoor heat exchanger with the smaller air volume will drop in temperature and the dropped indoor heat exchanger will freeze.
Therefore, in the cooling operation mode, the lower one of the detected temperatures T1 and T2 is selected in order to prevent the indoor heat exchangers 13a and 13b from freezing, and is taken as the evaporator temperature T.
[0077]
The evaporator temperature T is compared with the set value Tz for freezing prevention. If T is lower than Tz, the speed taps of the indoor blowers 14a and 14b are both increased.
As described above, the lower one of the detected temperatures T1 and T2 is taken in as the evaporator temperature T, and when the evaporator temperature T is lower than the set value Tz, the air volume of the indoor blowers 14a and 14b is increased to increase the indoor heat. Freezing of the exchangers 13a and 13b can be reliably prevented.
[0078]
In the above embodiment, if either of the temperature sensors 38a, 38b is abnormal, the normal detected temperature is selected and the air volume control is executed. However, the present invention is not limited to this. Instead, when there is an abnormality in either, the speed tap may be fixed and the air volume of each blower may be fixed.
[0079]
In the above-described embodiment, in the control for preventing the blowing of cold air during heating, the lower one of the detected temperatures T1 and T2 is selected to control the air volume. However, the present invention is not limited to this. May be compared with a set value Tx for preventing cool air blowout, and the air volume of each of the indoor blowers 14a and 14b may be individually controlled according to the comparison result.
[0080]
In the above embodiment, the air volume of the indoor blower is changed by switching the speed tap. However, the present invention is not limited to this. For example, an inverter circuit for driving the indoor blower is provided, and the output frequency of the inverter circuit is changed. , The air volume of the indoor blower may be changed steplessly.
[0081]
As shown in FIG. 10, the drain pump 23 is disposed at a corner of the unit main body 1. A magnetic field is generated from the motor during operation, and the main body is formed of a sheet metal near the motor. Or the heat exchanger is magnetized, and loud magnetic sound and magnetic vibration are generated. The magnetic sound is represented as 2nf. (N: 1, 2, 3, ..., f: power supply frequency)
In order to reduce such magnetic noise, it is preferable to adopt, for example, means shown in FIGS. 11 (A) and 11 (B).
In FIG. 11A, magnetic sound reducing plates 53a, 53a made of a magnetized material, for example, a steel plate, are arranged in parallel on both sides of the drain pump 23. In FIG. 11B, the periphery of the drain pump 23 is surrounded by a magnetic sound reducing plate 53b made of the same magnetized material, for example, a steel plate.
[0082]
During the operation of the drain pump 23, the magnetic noise generated from the motor is reduced by the respective magnetic noise reduction plates 53a and 53b. That is, since the rotating magnetic field of the motor part of the drain pump 23 is attenuated in the reduction plate, the main body and the heat exchanger are magnetized, and no large magnetic sound and magnetic vibration are generated.
The performance of the drain pump 23 is not impaired at all, and no special partition plate is required, so that magnetic noise can be reduced.
[0083]
FIG. 12A shows a measurement result when the magnetic sound reduction plate 53a of FIG. 11A is provided. The conditions were as follows: a dry (dehumidifying) air flow rate, the drain pump 23 was set to an idling state at 50 Hz and 200 V, and the microphone was set at a position 10 cm below the drain pump 23.
A reduction of 6.2 dB was obtained as compared with the case where the drain pump was partitioned by a conventional aluminum plate.
[0084]
FIG. 12B shows a measurement result in the case of the configuration including the magnetic sound reduction plate 53b of FIG. 11B. The conditions are the same as in the case of FIG.
A reduction of 10.7 dB was obtained as compared with the case where the drain pump was partitioned by a conventional aluminum plate.
[0085]
In the above embodiment, the present invention is applied to the so-called ceiling-mounted type air conditioner mounted on the ceiling surface. However, the present invention is not limited to this, and can be applied to a wall-mounted type having two indoor heat exchangers.
Further, it goes without saying that various modifications can be made without departing from the scope of the present invention.
[0086]
【The invention's effect】
As described above, according to the present invention, the components housed and arranged in the air conditioner main body, the fastening direction to the main body and the fastening direction between the components are set, and workability can be improved, By setting the arrangement structure of the pair of indoor blowers, the fan motors constituting each of the indoor blowers may have the same rotation direction, and the number of parts can be reduced.
[0087]
Further, according to the present invention, by setting the arrangement structure of the pair of indoor blowers, the fan motors constituting each of the indoor blowers may have the same rotation direction, and the number of parts can be reduced.
[0088]
Further, according to the present invention, during the operation of the drain pump, the magnetic noise generated from the motor is reduced, the magnetization of the unit body and the indoor heat exchanger is prevented, and the generation of the magnetic noise and the magnetic vibration is prevented. It has the effect of doing.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, and is a perspective view of an indoor unit of a ceiling-mounted air conditioner.
FIG. 2 is a perspective view of the embodiment, with some components of the indoor unit removed.
FIG. 3 is an exemplary exploded perspective view of components of the indoor unit according to the embodiment;
FIG. 4 is an exemplary perspective view of the indoor unit in which some components of the indoor unit are taken out and disassembled;
FIG. 5 is a diagram illustrating removal of the indoor blower according to the embodiment.
FIG. 6 is an exemplary exploded perspective view of a part of the indoor unit according to the embodiment;
FIG. 7 is a perspective view of the same embodiment with some components of the indoor unit removed.
FIG. 8 is a configuration diagram of a refrigeration cycle and a control circuit according to the embodiment.
FIG. 9 is a flowchart for explaining a cooling operation.
FIG. 10 is a bottom view of an indoor unit according to another embodiment.
FIG. 11A is a plan view showing a soundproof structure of the drain pump.
FIG. 3B is a plan view showing still another soundproof structure of the drain pump.
FIG. 12A is a diagram showing noise prevention characteristics in the soundproof structure of FIG. 11A.
FIG. 12B is a diagram showing noise prevention characteristics in the soundproofing structure of FIG.
[Explanation of symbols]
8 ... opening,
1. Air conditioner body (unit body)
19 ... heat exchanger fixing plate,
18 ... heat exchanger support plate,
30 ... End plate fixing plate,
13a, 13b ... indoor heat exchanger,
20 ... Motor receiver,
24 ... fan casing,
14a, 14b ... indoor blower,
26 ... Cross-flow fan
27 ... rubber bearing,
25a, 25b: fixing means (fixing screw),
28 ... Fan motor,
29 ... Motor cover,
28a: bracket part,
9 ... Notch,
20b ... protrusion,
10 ... Flange part,
12 ... End plate (of indoor heat exchanger).

Claims

A unit body having an opening on the lower side,
A pair of heat exchangers, each of which is provided on both sides of an upper wall surface of the unit body so as to be spaced apart and opposed to each other, and includes a piece hanging down from the unit body and a piece bent horizontally at a lower end edge of the piece. And a pair of heat exchanger support plates having a bent piece portion whose inner side edge is bent in a substantially U-shape,
It is disposed in an inclined shape in a side view and is opposed to each other, and both sides thereof are connected and integrated by an end plate fixing plate and abut on the bent piece portion of the heat exchanger support plate, and A pair of indoor heat exchangers in which the plate fixing plate is attached and fixed to the heat exchanger fixing plate via fixing means,
A motor receiving portion provided on each of the heat exchanger support plates,
A pair of fan casings provided opposite to the inclined upper part of the indoor heat exchanger and fixed to the upper wall of the unit body via fixing means,
A cross-flow fan that is arranged in each fan casing and configures a pair of indoor blowers,
A bearing for pivotally supporting one end of the cross flow fan; and a motor cover for holding and supporting a fan motor connected and fixed to the motor receiving portion via fixing means and connected to the other end of the cross flow fan. ,
The positions of the fan motor and the bearing of the pair of indoor blowers are arranged to be opposite to each other, and the fastening direction of the fixing means for fastening and fixing the respective components is made to coincide with the direction of the opening of the unit body. An air conditioner characterized by that:

A unit body having an opening on the lower side,
A pair of heat exchangers, each of which is provided on both sides of an upper wall surface of the unit body so as to be spaced apart and opposed to each other, and includes a piece hanging down from the unit body and a piece bent horizontally at a lower end edge of the piece. And a pair of heat exchanger support plates having a bent piece portion whose inner side edge is bent in a substantially U-shape,
It is disposed in an inclined shape in a side view and is opposed to each other, and both sides thereof are connected and integrated by an end plate fixing plate and abut on the bent piece portion of the heat exchanger support plate, and A pair of indoor heat exchangers in which the plate fixing plate is attached and fixed to the heat exchanger fixing plate via fixing means,
On the outer surface side of each of the heat exchanger support plates, a cutout portion is provided from the lower end edge to a middle portion, and a motor receiving portion in which a semicircular flange portion is formed on the upper end edge of the cutout portion,
A motor cover that has a flange portion formed in a semicircular shape facing the flange portion of the motor receiving portion, and is attached and fixed to the motor receiving portion via fixing means;
A pair of fan casings provided opposite to each other on the inclined upper portion of the indoor heat exchanger and fixed to the unit body via fixing means,
A fan motor constituting a pair of indoor blowers, which is sandwiched between the motor receiving portion and each flange portion of the motor cover,
The fan motor is connected to the fan motor and disposed in the fan casing. One end of the shaft is pivotally supported by a bearing attached to the fan casing, and the other end of the boss is inserted into the bracket of the fan motor. With a cross flow fan,
The positions of the fan motor and the bearing of the pair of indoor blowers are arranged to be opposite to each other, and the fastening direction of the fixing means for fastening and fixing the respective components is made to coincide with the direction of the opening of the unit body. An air conditioner characterized by that:

The pair of indoor heat exchangers includes a holding device that is suspended and held by the unit body when the end plate fixing plate is released from fastening of the fixing means from the heat exchanger fixing plate. The air conditioner according to any one of claims 1 and 2, wherein

A unit body having an opening on the lower side,
A pair of heat exchangers, each of which is provided on both sides of an upper wall surface of the unit body so as to be spaced apart and opposed to each other, and includes a piece hanging down from the unit body and a piece bent horizontally at a lower end edge of the piece. And a pair of heat exchanger support plates having a bent piece portion whose inner side edge is bent in a substantially U-shape,
It is disposed in an inclined manner in a C-shape in a side view and arranged opposite to each other, and both side portions thereof are connected to each other by an end plate fixing plate and are integrated with each other to abut on the bent piece portion of the heat exchanger support plate, A pair of indoor heat exchangers, wherein the end plate fixing plate is attached and fixed to the heat exchanger fixing plate via fixing means,
On the outer surface side of each of the heat exchanger support plates, a cutout portion is provided from the lower end edge to a middle portion, and a motor receiving portion in which a semicircular flange portion is formed on the upper end edge of the cutout portion,
A motor cover that has a flange portion formed in a semicircular shape facing the flange portion of the motor receiving portion, and is attached and fixed to the motor receiving portion via fixing means;
A pair of fan casings provided opposite to each other on the inclined upper portion of the indoor heat exchanger and fixed to the unit body via fixing means,
A fan motor sandwiched between the motor receiving portion and the flange portions of the motor cover,
A cross flow fan is disposed in each of the fan casings, one end of which is pivotally supported by a bearing attached to the fan casing, and the other end of the boss is inserted into a bracket of the fan motor. And, a pair of indoor blowers in which the positions of the fan motor and the bearing are provided on opposite sides,
An electrical component box detachably mounted from the opening of the unit body,
A drain pump mounting base formed at the corner of the unit body,
An air conditioner comprising: a drain pump which is detachably attached to the drain pump mounting base from an opening, and around which a magnetic sound reducing plate is juxtaposed or surrounded.