JP2004116977A

JP2004116977A - Air conditioner

Info

Publication number: JP2004116977A
Application number: JP2002285131A
Authority: JP
Inventors: Takashi Uchiumi; 内海　隆志
Original assignee: Fujitsu General Ltd
Current assignee: Fujitsu General Ltd
Priority date: 2002-09-30
Filing date: 2002-09-30
Publication date: 2004-04-15

Abstract

<P>PROBLEM TO BE SOLVED: To make temperature-regulated air after heat exchange able to be blown off toward a specific area inside a room. <P>SOLUTION: An indoor heat exchanger 1 is divided into three sections, which are an auxiliary heat exchangers 1a and main heat exchangers 1b and 1c, and corresponding to them, an air blow hole on the main body lower side is divided into three parts, which are a spot air blow hole 2 in the center and main air blow holes 3 and 4 having upper and lower air direction plates 5 and 6 and arranged on the left and right sides. In spot cooling operation and in spot heating operation, a refrigerant is passed only through the auxiliary heat exchanger 1a, and at the same time, the main air blow holes 3 and 4 on the left and right sides by means of the upper and lower air direction plates 5 and 6. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、冷風や温風などを吹き出して室温コントロールを行う空気調和機に関し、さらに詳しく言えば、複数の空気吹出し口を有し、そのうちの一つを集中的吹き出し（スポット吹き出し）として、使用者などの利便性の向上を図るようにした空気調和機に関するものである。
【０００２】
【従来の技術】
空気調和機の室内機は、空気吸込口と空気吹き出し口とを備えているが、一般的に空気吹き出し口はひとつであり、その空気吹き出し口内に、風向きを変えるための上下風向板や左右風向板が設けられている。
【０００３】
風向板の操作の一例として、暖房運転時には、暖風が上昇しやすく足元が温まりにくいことから、吹き出し方向を下向きとし、その足元の温度を上げるようにする。冷房運転時には、逆に吹き出し方向を上向きとし、冷風が床面側に滞留しないようにする。
【０００４】
このように、空気吹出し口内に上下風向板や左右風向板を設けることにより、室内環境を快適状態とし、また、その維持が可能であるが、風向きを変えるにしても、空気吹出し口全体の向きを変えるものであるため、室内の特定領域に対して集中的に冷風や温風などを吹き出すことができない。
【０００５】
そこで、空気吹出し口を複数個とした構造の空気調和機が提案されている（例えば、下記の特許文献１参照）。この従来技術としての空気調和機において、その室内機には、上部および下部に空気吹き出し口を備え、暖房運転時には、熱交換した温風を下部の吹き出し口から吹き出すことにより、使用者などの足元を集中的に暖めることができる。
【０００６】
【特許文献１】
特開平１１―６３６２９号公報（第２図）
【０００７】
【発明が解決しようとする課題】
しかしながら、上述した空気調和機においては、複数の空気吹出し口を持つにしても、上部および下部の空気吹出し口が、それぞれ室内機の横方向一杯にワイドに形成されており、室内の上部全体もしくは下部全体に対して調温空気を送ることができるが、室内の特定領域に対して集中的（スポット的）な吹き出しができず、例えば室内機の前に立っている使用者などに対して強力冷風や温風などを集中的に吹き出すことができないという欠点がある。
【０００８】
特に、夏季にあっては使用者などが風呂上がりに強力な冷風を直接的に受けたいことがあり、冬季にあっては温風を直接的に受けたいこともままあるが、従来の空気調和機では、このような要望に応えることができない。
【０００９】
本発明は、上記課題を解決するためになされたものであり、その目的は、室内の特定領域に対して集中的（スポット的）に冷風や温風などを吹き出し可能とする特定運転モードを備えた空気調和機を提供することにある。
【００１０】
【課題を解決するための手段】
上記目的を達成するために、本発明は、圧縮機，四方弁，室外熱交換器，膨張弁および室内熱交換器を含む可逆式冷凍サイクルを備え、室内機の空気吸入口と空気吹出し口とを結ぶ空気通路内に、上記室内熱交換器が室内ファンとともに配置されている空気調和機において、上記空気吹出し口が、室内の特定領域に向けて空気を集中してに吹き出すひとつのスポット空気吹出し口および２つの主空気吹出し口の少なくとも３つに区画されているとともに、上記室内熱交換器が、上記スポット空気吹出し口に対応するひとつの副熱交換器および上記各主空気吹出し口に対応する２つの主熱交換器の少なくとも３つに分割されており、上記各主熱交換器が減圧器を介して直列に接続された状態で上記副熱交換器に対してさらに直列に接続され、上記副熱交換器と上記膨張弁との間には、開閉弁を有するバイパス管路が上記各主熱交換器に対して並列的に接続されており、少なくとも上記室内側減圧器，上記開閉弁および上記膨張弁を制御する制御手段を備え、上記制御手段により、当該空気調和機の運転モードのひとつとして、上記冷凍サイクルの冷媒を上記副熱交換器のみに流し、上記スポット空気吹出し口より調温された空気を室内の特定領域に向けて集中的に吹き出し可能としたことを特徴としている。
【００１１】
本発明において、上記スポット空気吹出し口には、空気吹き出し面積が上記主空気吹出し口よりも小さく、かつ、空気吹き出し方向に伸縮し、上下方向に可動な送風ガイド筒が設けられていることが好ましい。
【００１２】
また、上記スポット空気吹出し口が上記空気吹出し口の中央に配置され、その両側に上記主空気吹出し口が配置されていることが好ましい。また、特定運転モード時には、上記主空気吹出し口内に設けられている上下風向板を閉じることにより、上記スポット空気吹出し口からより多くの調温空気を集中的吹き出しすることができる。これとは反対に、上記上下風向板を開けることにより、上記主空気吹き出し口からの送風を加えることができる。
【００１３】
本発明においては、上記スポット空気吹出し口からの集中的吹き出しのみか、もしくは上記主空気吹出し口内の上下風向板を開いて同主空気吹出し口からの送風を加えるかの選択をリモコンによって行うことができる。
【００１４】
また、集中的吹き出し時間が所定値に達したとき、あるいは室温と設定温度の差が所定値以内になったときに、上記上下風向板を制御して送風を加えるようにすることもできる。これにより、冷え過ぎ、あるいは温まり過ぎを防止することができる。
【００１５】
本発明において、冷房除湿運転モード時には、上記開閉弁を閉じるとともに、上記膨張弁を全開にし、上記減圧器を絞り制御して上記副熱交換器および上記複数の主熱交換器のうち同減圧器よりも副熱交換器側の主熱交換器を蒸発器とし、残りの主熱交換器を室外熱交換器と同じ凝縮器とし、上記空気吹き出し口から冷風を吹き出させる。これによれば、冷房能力をそれほど低下させることなく、除湿を行うことができる。
【００１６】
暖房除湿運転モード時には、上記開閉弁を閉じるとともに、上記膨張弁を全開にし、上記減圧器を絞り制御して上記副熱交換器および上記複数の主熱交換器のうち同減圧器よりも副熱交換器側の主熱交換器を凝縮器とし、残りの主熱交換器を室外熱交換器と同じ蒸発器として、上記空気吹き出し口から温風を吹き出させる。これにより、暖房能力がそれほど低下することなく、除湿を行うことができる。
【００１７】
また、除霜運転モード時では、上記開閉弁を開くとともに、上記減圧器を閉じ、上記バイパス管を介して上記補助室内熱交換器のみに冷媒を流し、上記上下風向板を制御して上記主空気吹出し口を閉じて、上記スポット空気吹出し口からのみ温風を吹き出させることにより、室内温度を低下させることなく、上記室外熱交換器の霜が速やかに除去される。
【００１８】
本発明によると、上記スポット空気吹出し口に設けられている送風ガイド筒を所定方向に駆動する筒体駆動手段を備え、リモコンの操作に応じて上記筒体駆動手段を駆動して上記送風ガイド筒の長さおよび／または方向を任意に調整することができる。
【００１９】
また、上記室内ファンは、上記スポット空気吹出し口および上記主空気吹出し口に対して共用されてよいが、これ以外の構成として、上記主空気吹出し口用のクロスフローファンとは別に、上記スポット空気吹出し口専用のクロスフローファンを備えた構成であってもよい。
【００２０】
【発明の実施の形態】
以下、図１ないし図１９に基づいて、本発明の実施形態を詳細に説明する。図１は本発明における室内機の内部構造を概略的に示す斜視図、図２は本発明の空気調和機が備える冷凍サイクルを示すブロック図、図３は本発明による空気調和機の制御系を示すブロック図である。
【００２１】
ます、図１を参照して、本発明による空気調和機の室内機は、室内熱交換器１を横方向に複数に分割（例えば３分割）するとともに、これに対応して本体下部側の空気吹出し口を複数個（例えば３つ）に分割し、少なくともひとつの空気吹き出し口から集中的吹き出し可能としている。
【００２２】
すなわち、空気吹出し口２，３，４は、各室内熱交換器１ａ，１ｂ，１ｃに対応しているが、その中央の空気吹出し口２は筒形状のスポット空気吹出し口で中央の室内熱交換器（副熱交換器）１ａと対応している。
【００２３】
このスポット空気吹出し口２の両側の空気吹出し口３，４は、横長の形状の主空気吹出し口で、副熱交換器１ａの両側の熱交換器（主熱交換器）１ｂ，１ｃと対応している。また、これら主空気吹出し口３，４内には、それぞれ上下風向板５，６が設けられている。
【００２４】
なお、この例とは異なり、主空気吹出し口３，４を隣り合わせに配置し、その脇にスポット空気吹出し口２を配置してもよい。その場合、主空気吹出し口３，４をひとつの空気吹出し口として一連に形成してもよい。また、主空気吹出し口３，４内には、上下風向板５，６のほかに左右風向板が設けられてもよい。
【００２５】
上記室内熱交換器１ａ，１ｂ，１ｃは、空気吸入口と空気吹き出し口２，３，４との間の空気通路内に本体の前面側から背面側にかけて配置され、それら室内熱交換器１ａ，１ｂ，１ｃの内側には、クロスフローファンからなる室内ファン７が配置されている。
【００２６】
図２を参照して、室内熱交換器１ａ，１ｂ，１ｃは順次直列に接続してなるが、左右の室内熱交換器（主熱交換器）１ｂ，１ｃを接続する配管には減圧器８が設けられ、また、室内熱交換器（副熱交換器）１ａにのみ冷媒を流すために主熱交換器１ｂ，１ｃをバイパスするバイパス管９が設けられているとともに、このバイパス管９には双方向電磁弁（開閉弁）１０が設けられている。
【００２７】
図３を参照して、この空気調和機の制御装置は、室内機側の制御回路１１および室外機側の制御回路１２を備え、リモコン１３からのリモコン信号に応じて室温コントロールに必要な制御を行い、また、上下風向板５，６を制御して主空気吹出し口３，４を塞ぎ、中央のスポット空気吹出し口２から室内の特定領域（狭い領域）に対して集中的に冷風あるいは温風などを吹き出す制御を行う。
【００２８】
上記室内機は壁掛け型であり、中央のスポット空気吹出し口２には、図１の破線矢印に示すように、空気吹出し方向に伸縮可能であるとともに、上下方向にも可動な送風ガイド筒２ａが設けられている。室内機の他の構成として、本体の前面側にはリモコン１３からのリモコン信号を受信する受信部などが備えられている。
【００２９】
上記室外機の方には、上記副熱交換器１ａおよび主熱交換器１ｂ，１ｃとともに可逆的な冷凍サイクルを構成する四方弁１４、圧縮機１５および室外熱交換器１６と、電子膨張弁１７と、室外ファン１８とを備えている。
【００３０】
上記室内機の制御系の制御回路１１は、リモコン１３の設定操作に応じて上下風向板５，６および室内ファン７を制御し、室温と設定温度の差に応じた圧縮機の運転コードなどを室外機側の制御回路１２に送信するとともに、その制御回路１２との間で室温コントロールに必要な信号の授受を行い、またリモコン１３の設定操作に応じてスポット吹き出し制御を実行する。
【００３１】
そのために、制御回路１１は、リモコン信号により制御判別し、左右の上下風向板５，６、室内ファン７、減圧器８、双方向電磁弁１０を制御する機能を備え、また、送風ガイド筒２ａを適宜伸縮方向および／または上下方向に駆動するにモータ、ギヤあるいはスライド機構などからなるスポット伸縮駆動部１９を制御する機能を備えている。制御回路１２は、室内機側からの運転モードなどを判別し、四方弁１４，圧縮機１５，電子膨張弁１７および室外ファン１８を制御する機能を備えている。
【００３２】
次に、本発明の空気調和機の動作を図４ないし図６、図１０および図１２ないし図１４の冷凍サイクル構成図、図７ないし図９および図１７ないし図１９の室内機の模式的正面図を参照して説明する。
【００３３】
まず、通常の冷房運転モードの場合には、減圧器８を全開状態として、四方弁１４を図４の状態に切り替える。これにより、図４の実線矢印に示すように、圧縮機１５からの冷媒が四方弁１４→室外熱交換器１６→電子膨張弁１７→主熱交換器１ｃ→主熱交換器１ｂ→減圧器８→副熱交換器１ａ→四方弁１４の順に流れ、圧縮機１５に戻る。
【００３４】
これにより、室外熱交換器１６が凝縮器となり、副熱交換器１ａおよび主熱交換器１ｂ，１ｃの全てが蒸発器となり、上下風向板５，６および室内ファン７が制御されることで、主空気吹出し口３，４からは冷風が吹き出され、また、スポット空気吹出し口２からも冷風が吹き出される。
【００３５】
また、通常の暖房運転モードの場合には、減圧器８を全開状態として、四方弁１４を図５の状態に切り替える。これにより、図５の破線矢印に示すように、圧縮機１５からの冷媒が四方弁１４→副熱交換器１ａ→主熱交換器１ｂ→減圧器８→主熱交換器１ｃ→電子膨張弁１７→室外熱交換器１６→四方弁１４の順に流れ、圧縮機１５に戻る。
【００３６】
この場合、補助熱交換１ａおよび主熱交換器１ｂ，１ｃの全てが凝縮器となり、室外熱交換器１６が蒸発器となることから、主空気吹出し口３，４からは温風が吹き出され、また、スポット空気吹出し口２からも温風が吹き出される。
【００３７】
ところで、スポット冷房運転モード時においては、図６に示すように、左右の上下風向板５，６を上向きに制御して主空気吹出し口３，４を塞ぐようにし、減圧器８を全閉状態にするとともに、双方向電磁弁１０を開き、他部については上述した通常の冷房運転と同様に制御する。
【００３８】
すると、主熱交換器１ｂ，１ｃには冷媒がながれず、その冷媒がバイパス管９を介して副熱交換器１ａに流れ、副熱交換器１ａのみが蒸発器となり、この副熱交換器１ａによって熱交換された冷風がスポット空気吹出し口２から吹き出される。
【００３９】
その冷風は、送風ガイド筒２ａが向いている方向に吹き出され、つまり室内の特定領域に対して吹き出され、しかも冷媒が副熱交換器１ａにのみ流れるために熱交換が大きく、通常より低い温度の冷風がスポット空気吹出し口２から吹き出される。このようにして、室内の特定領域（例えば室内機の前に居る使用者など）に対して集中的に冷風を吹き出すことにより、強力な冷風を使用者などに当てることができる。
【００４０】
好ましくは、図７に示すように、運転開始時に送風ガイド筒２ａの向きを多少下向きとし、スポット冷房を使用者などに直接当てて素早く冷やすようにするよい。そして、所定時間が経過すると、図８に示すように、閉じていた左右の主空気吹出し口３，４を開くように上下風向板５，６を制御する。このとき、送風ガイド筒２ａの向きを若干上向きとしたうえで、減圧器８を開として通常の冷房運転に切り替えるとよい。
【００４１】
これにより、冷風が左右からも吹き出され、室内環境の向上が図れ、しかも使用者などが冷え過ぎてしまうこともない。室温が設定温度に達すれば、冷房モードから送風モードに切り替え、また、送風ガイド筒２ａの向きを水平方向とすることにより、室内環境が最適に維持される。したがって、上記スポット冷房運転は、省エネルギ健康冷房と言うことができる。
【００４２】
スポット暖房運転モード時においては、図１０に示すように、冷凍サイクルを図６に示すスポット冷房運転と逆にする（図１０の破線矢印参照）。なお、送風ガイド筒２ａの向きはスポット冷房運転時よりも下向きにするとよい。これより、スポット空気吹出し口２からは温風が吹き出され、送風ガイド筒２ａにより絞られた通常より高い温度の温風が使用者に吹き付けられる。
【００４３】
また、上記スポット暖房運転モードにあっては、上述したスポット冷房運転と同様に、所定時間が経過すると、左右の上下風向板５，６の向きを制御して左右の主空気吹出し口３，４からも温風を吹き出すことが好ましい。そして、室温が設定温度に達すれば、暖房モードから送風モードに切り替える。
【００４４】
なお、上記スポット暖房運転モード時において、図１１に示すように、左右の上下風向板５，６を上向きにすることにより、左右の主空気吹出し口３，４から送風を利用してサーキュレータにすることができる。
【００４５】
この場合、送風ガイド筒２ａの向きは変更しないままにするとよい。これにより、室内環境が最適に維持される。したがって、上記スポット暖房運転は、スポット冷房運転と同様に、省エネルギ健康暖房と言うことができる。
【００４６】
また、上記スポット冷房運転モード時において、図１２に示すように、上下風向板５，６を制御して主空気吹出し口３，４を開けることにより、主空気吹出し口３，４からの送風により冷風を攪拌することもできる。
【００４７】
すなわち、室内熱交換器１ａのみに冷媒が流れることから、室内機の中央からはスポット冷風が吹き出され、その両側からは室温と同じ温度の空気が吹き出され、これが扇風機の役割を果たすことになり、特定領域に達したスポット冷風が効率的に室内に循環され、室温の均一化が図られる。
【００４８】
また、上記スポット暖房運転モードにおいて、図１３に示すように、冷凍サイクルを図１２に示すスポット冷房と送風を合わせた運転と逆にすることにより、室内機の中央からはスポット温風が吹き出され、その両側からは室温と同じ温度の空気が吹き出され、これがサーキュレータの役割を果たす。
【００４９】
なお、上記スポット冷房、スポット暖房およびそれら含む運転を行っている場合、リモコン１３によって双方向電磁弁１０を開閉制御可能にしてもよい。これにより、使用者などの好みや室内環境を考慮した運転が行え、利便性の向上および機能拡大が図れるようになる。
【００５０】
この空気調和機の運転モードには、上記の各モードの他に冷房除湿運転モード，暖房除湿運転モードおよびノンストップ暖房運転モードがある。
【００５１】
まず、リモコン１３によって冷房除湿運転が設定された場合、図１４に示すように、電子膨張弁１７を全開状態にする一方、双方向電磁弁１０を閉じ、減圧器８を絞り制御とし、室内熱交換器１ｃを室外熱交換器１６と同じ凝縮器とし、主熱交換器１ｂおよび副熱交換器１ａを蒸発器とする。すなわち、通常の冷房運転時と逆に、減圧器８を絞り制御し、電子膨張弁１７の全開状態とするが、その冷凍サイクルの冷媒は冷房運転と同じ向きに流れるようにする。
【００５２】
このように、室内熱交換器１を凝縮器と蒸発器の混合形式とすることより、冷房の低下を抑えながら、冷房除湿運転を行うことができる。なお、上記双方向電磁弁１０を開くことにより、副熱交換器１ａを加熱し、つまり除湿優先とすることも可能である。
【００５３】
次に、リモコン１３によって暖房除湿運転が設定された場合には、図１５に示すように、電子膨張弁１７を全開状態にする一方、双方向電磁弁１０を閉じ、減圧器８を絞り制御とし、副熱交換器１ａおよび主熱交換器１ｂを凝縮器とし、主熱交換器１ｃを室外熱交換器１６と同じ蒸発器とする。すなわち、通常の暖房運転時と逆に、減圧器８を絞り制御し、電子膨張弁１７の全開状態とするが、その冷凍サイクルの冷媒は暖房運転と同じ向きに流れるようにする。このように、室内熱交換器１を凝縮器と蒸発器の混形式とすることより、冷房の低下を抑えながら、暖房除湿運転を行うことができる。
【００５４】
また、リモコン１３によってノンストップ暖房運転が設定された場合には、図１６に示すように、電子膨張弁１７を全開状態にするとともに、減圧器８を全閉状態とする一方、双方向電磁弁１０を開く。そして、冷媒については暖房運転と同じに流す。これにより、室内熱交換器１の副熱交換器１ａのみに冷媒が流れるため、その副熱交換器１ａが凝縮器となり、室外熱交換器１６には高圧ガスの冷媒が流入する。
【００５５】
この場合、左右の上下風向板５，６を上方向に向けて主空気吹出し口３，４を閉じ、スポット空気吹出し口２からのみ温風を吹き出すようにすることが好ましい。すなわち、暖房能力が低く、それほど高くない温風を多く吹き出すと、空気調和機の異常と誤った判断されることがあるからである。
【００５６】
このノンストップ暖房運転によれば、暖房能力は低くなるが、その分、室外熱交換器１６の除霜能力を高くすることができる。なお、このノンストップ暖房運転にあっては、室外熱交換器１６に多量の霜が付いてしまっている場合には、その除霜を行うことが難しい。したがって、霜が付き始めたらノンストップ暖房運転を行うようにするとよく、例えばその霜付きについは室外熱交換器１６の温度を監視して判断する。
【００５７】
また、上記ノンストップ暖房運転にあっては、例えば図１７に示すように、運転開始時にスポット暖房とし、暖房能力を最小限に抑えるようにする。除霜運転が終了して、例えば室外熱交換器１６の温度が所定値に上昇したら、図１８に示すように、上述したスポット暖房運転によるスポット暖房を使用者などに直接当て、素早く暖める。
【００５８】
そして、所定時間が経過すると、図１９に示すように、閉じていた左右の主空気吹出し口３，４を開くように、上下風向板５，６を制御し、その吹き出し口３，４からも温風を吹き出すようにする。これにより、温風が左右からも吹き出され、室内環境の向上が図れる。
【００５９】
このように、室内機の空気吹き出し口を複数個とし、そのうちのひとつをスポット吹き出し口としており、冷風や温風をそのスポット吹き出し口からのみ吹き出すことにより、その冷風や温風を室内の特定領域（例えば室内の使用者など）に対して集中させることができ、特に湯上がりの使用者などに対し、夏場には素早く冷やして快適感を与え、冬場には速やかに暖めて湯ざめを防止することができる。
【００６０】
また、室内熱交換器を複数に分割し、その間に絞り制御可能な減圧器を設けたことにより、室内熱交換器を凝縮器と蒸発器の組合せた形にすることができ、ひいては除湿や除霜などの効率向上が図れ、ひいては空気調和機の性能向上が図れる。
【００６１】
なお、上述した実施形態では、室内機の室内ファンがひとつであるが、例えばスポット空気吹出し口２の専用ファンを設け、つまり２つの室内ファンを設けるようにしてもよい。また、その送風ガイド筒２ａは円筒形のみでなく、断面正方形や長方形の筒状のものとしてもよい。
【００６２】
この場合、そのスポット専用ファンはスポット空気吹出し口２付近に設け、例えば室内機本体内部側あるいはそのスポット空気吹出し口２の内部に設けるとよい。また、そのスポット専用ファンの制御については、室内ファン７による風量を阻害しないように、その室内ファン７が回転するときには専用ファンも回転させるとよい。
【００６３】
【発明の効果】
以上説明したように、本発明によれば、室内の適温制御を阻害することなく、室内の特定領域に対して集中的に強力な冷風あるいは温風などを吹き出すことができ、空気調和機の機能向上を図ることができる。
【図面の簡単な説明】
【図１】本発明における室内機の内部構造を概略的に示す斜視図。
【図２】本発明の空気調和機の冷凍サイクルを示す概略的なブロック図。
【図３】本発明の空気調和機が備える制御装置を示す概略的なブロック線図。
【図４】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図５】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図６】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図７】上記制御装置により制御される送風ガイド筒および上下風向板を動作を説明するための室内機正面図。
【図８】上記制御装置により制御される送風ガイド筒および上下風向板を動作を説明するための室内機正面図。
【図９】上記制御装置により制御される送風ガイド筒および上下風向板を動作を説明するための室内機正面図。
【図１０】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１１】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１２】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１３】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１４】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１５】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１６】上記制御装置の動作を説明するための概略的な冷凍サイクルの構成図。
【図１７】上記制御装置により制御される送風ガイド筒および上下風向板を動作を説明するための室内機正面図。
【図１８】上記制御装置により制御される送風ガイド筒および上下風向板を動作を説明するための室内機正面図。
【図１９】上記制御装置により制御される送風ガイド筒および上下風向板を動作を説明するための室内機正面図。
【符号の説明】
１　室内熱交換器
１ａ　副熱交換器
１ｂ，１ｃ　主熱交換器
２　スポット空気吹出し口
２ａ　送風ガイド筒
３，４　主空気吹出し口
５，６　上下風向板
７　室内ファン
８　減圧器
９　バイパス管
１０　双方向電磁弁
１１　室内機制御回路
１２　室外機制御回路
１３　リモコン
１４　四方弁
１５　圧縮機
１６　室外熱交換器
１７　電子膨張弁
１８　室外ファン
１９　スポット伸縮駆動部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air conditioner that controls room temperature by blowing cold air or hot air, and more specifically, has a plurality of air outlets, one of which is used as a concentrated outlet (spot outlet). The present invention relates to an air conditioner designed to improve the convenience of persons and the like.
[0002]
[Prior art]
An indoor unit of an air conditioner is provided with an air inlet and an air outlet.In general, there is only one air outlet, and a vertical plate for changing the wind direction and a horizontal wind direction are provided in the air outlet. A plate is provided.
[0003]
As an example of the operation of the wind direction plate, during the heating operation, since the warm air tends to rise and the feet are hard to warm, the blowing direction is set to be downward and the temperature of the feet is increased. During the cooling operation, the blowout direction is directed upward so that the cool air does not stay on the floor side.
[0004]
As described above, by providing the upper and lower wind direction plates and the left and right wind direction plates in the air outlet, the indoor environment can be made comfortable and maintained, but even if the wind direction is changed, the orientation of the entire air outlet is changed. Therefore, it is not possible to intensively blow cold air or warm air into a specific area in the room.
[0005]
Therefore, an air conditioner having a structure having a plurality of air outlets has been proposed (for example, see Patent Document 1 below). In this air conditioner as a conventional technology, the indoor unit is provided with air outlets at an upper portion and a lower portion, and at the time of a heating operation, heat-exchanged hot air is blown out from a lower outlet to provide a foot for a user or the like. Can be intensively warmed.
[0006]
[Patent Document 1]
JP-A-11-63629 (FIG. 2)
[0007]
[Problems to be solved by the invention]
However, in the above-described air conditioner, even if the air conditioner has a plurality of air outlets, the upper and lower air outlets are each formed to be wide in the lateral direction of the indoor unit, and the entire upper part of the indoor unit or Temperature-controlled air can be sent to the entire lower part, but intensive (spot-like) blowing cannot be performed for a specific area in the room, and is powerful for users standing in front of indoor units, for example. There is a drawback that it is not possible to intensively blow cold or warm air.
[0008]
In summer, in particular, users may want to receive strong cold wind directly after bathing, and in winter, they may want to receive warm air directly. The machine cannot meet such demands.
[0009]
The present invention has been made to solve the above-described problem, and has an object to provide a specific operation mode in which cold air, hot air, or the like can be intensively (spot-like) blown out to a specific area in a room. To provide an improved air conditioner.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a reversible refrigeration cycle including a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, wherein an air inlet and an air outlet of an indoor unit are provided. In an air conditioner in which the indoor heat exchanger is arranged together with an indoor fan in an air passage connecting the air outlets, the air outlet is a single spot air outlet that blows out air in a concentrated manner toward a specific area in the room. And at least three of the two main air outlets, and the indoor heat exchanger corresponds to one sub heat exchanger corresponding to the spot air outlet and each of the main air outlets. Divided into at least three of the two main heat exchangers, wherein each of the main heat exchangers is further connected in series to the sub heat exchanger in a state of being connected in series via a decompressor; A bypass pipe having an on-off valve is connected in parallel with each of the main heat exchangers between the sub heat exchanger and the expansion valve, and at least the indoor decompressor, the on-off valve and A control unit for controlling the expansion valve, wherein the control unit allows the refrigerant of the refrigeration cycle to flow only to the sub heat exchanger as one of the operation modes of the air conditioner, and controls the temperature from the spot air outlet. It is characterized in that it is possible to intensively blow the extracted air toward a specific area in the room.
[0011]
In the present invention, it is preferable that the spot air outlet is provided with a blower guide tube that has an air blowing area smaller than the main air outlet, expands and contracts in the air blowing direction, and is movable in the vertical direction. .
[0012]
Further, it is preferable that the spot air outlet is disposed at the center of the air outlet, and the main air outlets are disposed on both sides thereof. Further, in the specific operation mode, by closing the upper and lower wind direction plates provided in the main air outlet, more conditioned air can be intensively blown out from the spot air outlet. On the contrary, by opening the upper and lower wind direction plates, air can be blown from the main air outlet.
[0013]
In the present invention, it is possible to select by remote control whether only the concentrated blowout from the spot air blowout opening or the opening of the upper and lower wind direction plates in the main air blowout opening to apply the blowing from the same main air blowout opening. it can.
[0014]
Further, when the intensive blowing time reaches a predetermined value, or when the difference between the room temperature and the set temperature falls within the predetermined value, the upper and lower wind direction plates can be controlled to apply the air. Thereby, it is possible to prevent too cold or too warm.
[0015]
In the present invention, in the cooling and dehumidifying operation mode, the on-off valve is closed, the expansion valve is fully opened, and the decompressor is throttled to control the sub-heat exchanger and the decompressor of the plurality of main heat exchangers. The main heat exchanger on the side of the sub heat exchanger is the evaporator, the remaining main heat exchanger is the same condenser as the outdoor heat exchanger, and cool air is blown from the air outlet. According to this, dehumidification can be performed without significantly reducing the cooling capacity.
[0016]
In the heating and dehumidifying operation mode, the on-off valve is closed, the expansion valve is fully opened, the decompressor is throttled, and the sub heat exchanger and the plurality of main heat exchangers have a sub heat more than the decompressor. The main heat exchanger on the exchanger side is a condenser, and the remaining main heat exchanger is the same evaporator as the outdoor heat exchanger, and hot air is blown from the air outlet. As a result, dehumidification can be performed without significantly lowering the heating capacity.
[0017]
In the defrosting operation mode, the on-off valve is opened, the decompressor is closed, the refrigerant flows only into the auxiliary indoor heat exchanger via the bypass pipe, and the upper and lower wind direction plates are controlled to control the main airflow. By closing the air outlet and blowing hot air only from the spot air outlet, the frost of the outdoor heat exchanger is quickly removed without lowering the indoor temperature.
[0018]
According to the present invention, there is provided a cylinder driving means for driving a blowing guide cylinder provided in the spot air outlet in a predetermined direction, and driving the cylinder driving means in accordance with an operation of a remote controller to thereby control the blowing guide cylinder. Can be arbitrarily adjusted in length and / or direction.
[0019]
The indoor fan may be shared by the spot air outlet and the main air outlet. However, as another configuration, the spot air outlet is separate from the cross flow fan for the main air outlet. A configuration including a cross flow fan dedicated to the outlet may be employed.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view schematically showing the internal structure of an indoor unit according to the present invention, FIG. 2 is a block diagram showing a refrigeration cycle provided in the air conditioner of the present invention, and FIG. 3 is a control system of the air conditioner according to the present invention. It is a block diagram shown.
[0021]
First, referring to FIG. 1, the indoor unit of the air conditioner according to the present invention divides the indoor heat exchanger 1 into a plurality of parts (for example, three parts) in the lateral direction, The outlet is divided into a plurality (for example, three), so that concentrated air can be blown out from at least one air outlet.
[0022]
That is, the air outlets 2, 3, and 4 correspond to the indoor heat exchangers 1a, 1b, and 1c, respectively. The central air outlet 2 is a cylindrical spot air outlet and has a central indoor heat exchanger. (A sub heat exchanger) 1a.
[0023]
The air outlets 3 and 4 on both sides of the spot air outlet 2 are horizontally long main air outlets, and correspond to the heat exchangers (main heat exchangers) 1b and 1c on both sides of the sub heat exchanger 1a. ing. In addition, upper and lower wind direction plates 5 and 6 are provided in the main air outlets 3 and 4, respectively.
[0024]
Note that, unlike this example, the main air outlets 3 and 4 may be arranged adjacent to each other, and the spot air outlet 2 may be arranged beside the main air outlets 3 and 4. In this case, the main air outlets 3 and 4 may be formed in series as one air outlet. Further, in the main air outlets 3 and 4, left and right wind direction plates may be provided in addition to the upper and lower wind direction plates 5 and 6.
[0025]
The indoor heat exchangers 1a, 1b, 1c are arranged in the air passage between the air inlet and the air outlets 2, 3, 4 from the front side to the rear side of the main body. An indoor fan 7 composed of a cross flow fan is arranged inside 1b and 1c.
[0026]
Referring to FIG. 2, indoor heat exchangers 1a, 1b, and 1c are sequentially connected in series, and a pipe connecting the left and right indoor heat exchangers (main heat exchangers) 1b and 1c is provided with a decompressor 8 And a bypass pipe 9 for bypassing the main heat exchangers 1b and 1c for allowing the refrigerant to flow only to the indoor heat exchanger (sub-heat exchanger) 1a. A two-way solenoid valve (open / close valve) 10 is provided.
[0027]
Referring to FIG. 3, the control device of the air conditioner includes a control circuit 11 on the indoor unit side and a control circuit 12 on the outdoor unit side, and performs control necessary for room temperature control according to a remote control signal from remote control 13. Further, the main air outlets 3 and 4 are closed by controlling the upper and lower wind direction plates 5 and 6, and the central spot air outlet 2 is intensively cooled or warmed to a specific area (narrow area) in the room. Control to blow out the information.
[0028]
The indoor unit is a wall-mounted type, and an air blowing guide tube 2a that can expand and contract in the air blowing direction and is also movable in the vertical direction, as shown by the dashed arrow in FIG. Is provided. As another configuration of the indoor unit, a receiving unit for receiving a remote control signal from the remote control 13 is provided on the front side of the main body.
[0029]
The outdoor unit includes a four-way valve 14, a compressor 15, an outdoor heat exchanger 16, and an electronic expansion valve 17 which constitute a reversible refrigeration cycle together with the sub heat exchanger 1a and the main heat exchangers 1b, 1c. And an outdoor fan 18.
[0030]
The control circuit 11 of the control system of the indoor unit controls the vertical wind direction plates 5 and 6 and the indoor fan 7 in accordance with the setting operation of the remote controller 13, and outputs the operation code of the compressor and the like according to the difference between the room temperature and the set temperature. The signal is transmitted to the control circuit 12 on the outdoor unit side, a signal necessary for controlling the room temperature is exchanged with the control circuit 12, and spot blowing control is executed in accordance with the setting operation of the remote controller 13.
[0031]
For this purpose, the control circuit 11 has a function of controlling and discriminating the left and right wind direction plates 5 and 6, the indoor fan 7, the decompressor 8, and the bidirectional solenoid valve 10 based on a remote control signal. Is provided with a function of controlling a spot expansion / contraction drive unit 19 composed of a motor, a gear, a slide mechanism, or the like so as to appropriately drive in the expansion / contraction direction and / or the vertical direction. The control circuit 12 has a function of determining an operation mode or the like from the indoor unit side and controlling the four-way valve 14, the compressor 15, the electronic expansion valve 17, and the outdoor fan 18.
[0032]
Next, the operation of the air conditioner of the present invention will be described with reference to the refrigeration cycle configuration diagrams of FIGS. 4 to 6, 10 and 12 to 14, and schematic front views of the indoor units of FIGS. 7 to 9 and 17 to 19. This will be described with reference to the drawings.
[0033]
First, in the case of the normal cooling operation mode, the decompressor 8 is fully opened, and the four-way valve 14 is switched to the state shown in FIG. Thereby, as shown by the solid line arrow in FIG. 4, the refrigerant from the compressor 15 is supplied to the four-way valve 14 → the outdoor heat exchanger 16 → the electronic expansion valve 17 → the main heat exchanger 1c → the main heat exchanger 1b → the pressure reducer 8 It flows in the order of the sub heat exchanger 1a, the four-way valve 14, and returns to the compressor 15.
[0034]
Thereby, the outdoor heat exchanger 16 becomes a condenser, all of the sub heat exchanger 1a and the main heat exchangers 1b, 1c become evaporators, and the upper and lower wind direction plates 5, 6 and the indoor fan 7 are controlled. Cool air is blown from the main air outlets 3 and 4, and cool air is also blown from the spot air outlet 2.
[0035]
Further, in the case of the normal heating operation mode, the decompressor 8 is fully opened, and the four-way valve 14 is switched to the state shown in FIG. Thereby, as shown by the dashed arrow in FIG. 5, the refrigerant from the compressor 15 is supplied to the four-way valve 14 → the sub heat exchanger 1a → the main heat exchanger 1b → the pressure reducer 8 → the main heat exchanger 1c → the electronic expansion valve 17. It flows in the order of the outdoor heat exchanger 16 → the four-way valve 14 and returns to the compressor 15.
[0036]
In this case, since all of the auxiliary heat exchange 1a and the main heat exchangers 1b and 1c serve as condensers, and the outdoor heat exchanger 16 serves as an evaporator, warm air is blown out from the main air outlets 3 and 4. Warm air is also blown from the spot air blowout port 2.
[0037]
By the way, in the spot cooling operation mode, as shown in FIG. 6, the left and right upper and lower wind direction plates 5 and 6 are controlled upward to close the main air outlets 3 and 4, and the pressure reducer 8 is fully closed. At the same time, the two-way solenoid valve 10 is opened, and the other parts are controlled in the same manner as the normal cooling operation described above.
[0038]
Then, the refrigerant does not flow through the main heat exchangers 1b and 1c, the refrigerant flows through the bypass pipe 9 to the sub heat exchanger 1a, and only the sub heat exchanger 1a becomes an evaporator, and the sub heat exchanger 1a The cold air that has undergone heat exchange is blown out from the spot air outlet 2.
[0039]
The cold air is blown out in the direction in which the blow guide tube 2a is directed, that is, blown out to a specific area in the room. In addition, since the refrigerant flows only to the sub heat exchanger 1a, heat exchange is large, and the temperature is lower than normal. Is blown out from the spot air outlet 2. In this way, strong cold air can be applied to the user or the like by intensively blowing cold air to a specific area in the room (for example, a user in front of the indoor unit).
[0040]
Preferably, as shown in FIG. 7, at the start of the operation, the direction of the air guide tube 2a is slightly downward, and the spot cooling is directly applied to a user or the like to cool quickly. When the predetermined time elapses, as shown in FIG. 8, the upper and lower wind direction plates 5 and 6 are controlled so as to open the closed left and right main air outlets 3 and 4. At this time, it is preferable that the direction of the air blow guide cylinder 2a is slightly upward, and then the decompressor 8 is opened to switch to normal cooling operation.
[0041]
Thereby, the cool air is blown out from the left and right, so that the indoor environment can be improved, and the user or the like does not get too cold. When the room temperature reaches the set temperature, the mode is switched from the cooling mode to the blow mode, and the direction of the blow guide tube 2a is set to the horizontal direction, so that the indoor environment is optimally maintained. Therefore, the spot cooling operation can be called energy-saving health cooling.
[0042]
In the spot heating operation mode, as shown in FIG. 10, the refrigeration cycle is reversed from the spot cooling operation shown in FIG. 6 (see the dashed arrow in FIG. 10). Note that the direction of the blow guide tube 2a may be set lower than in the spot cooling operation. As a result, warm air is blown out from the spot air outlet 2, and the warm air having a higher temperature than normal squeezed by the blower guide tube 2a is blown to the user.
[0043]
In the spot heating operation mode, similarly to the spot cooling operation described above, after a lapse of a predetermined time, the directions of the left and right vertical air direction plates 5 and 6 are controlled to control the left and right main air outlets 3 and 4. Therefore, it is preferable to blow hot air. Then, when the room temperature reaches the set temperature, the mode is switched from the heating mode to the blow mode.
[0044]
In the spot heating operation mode, as shown in FIG. 11, the left and right upper and lower wind direction plates 5 and 6 are turned upward, so that a circulator is formed by using air blowing from the left and right main air outlets 3 and 4. be able to.
[0045]
In this case, the direction of the blow guide tube 2a may be left unchanged. Thereby, the indoor environment is optimally maintained. Therefore, the spot heating operation can be said to be energy-saving healthy heating similarly to the spot cooling operation.
[0046]
In the spot cooling operation mode, the main air outlets 3 and 4 are opened by controlling the upper and lower wind direction plates 5 and 6 as shown in FIG. Cold air can also be agitated.
[0047]
That is, since the refrigerant flows only in the indoor heat exchanger 1a, spot cool air is blown out from the center of the indoor unit, and air having the same temperature as room temperature is blown out from both sides thereof, which serves as a fan. In addition, the spot cold air that has reached the specific area is efficiently circulated in the room, and the room temperature is made uniform.
[0048]
In the spot heating operation mode, as shown in FIG. 13, by reversing the refrigeration cycle from the operation in which the spot cooling and the blowing shown in FIG. 12 are combined, spot warm air is blown from the center of the indoor unit. Air is blown from both sides at the same temperature as room temperature, and this serves as a circulator.
[0049]
When performing the above-described spot cooling, spot heating, and the operation including them, the bidirectional solenoid valve 10 may be opened and closed by the remote controller 13. As a result, it is possible to perform driving in consideration of the preferences of the user and the like and the indoor environment, thereby improving convenience and expanding functions.
[0050]
The operation modes of the air conditioner include a cooling dehumidification operation mode, a heating dehumidification operation mode, and a non-stop heating operation mode in addition to the above-described modes.
[0051]
First, when the cooling and dehumidifying operation is set by the remote controller 13, as shown in FIG. 14, the electronic expansion valve 17 is fully opened, the bidirectional solenoid valve 10 is closed, the pressure reducer 8 is throttle-controlled, and the indoor heat is controlled. The exchanger 1c is the same condenser as the outdoor heat exchanger 16, and the main heat exchanger 1b and the sub heat exchanger 1a are evaporators. In other words, contrary to the normal cooling operation, the decompressor 8 is throttle-controlled to make the electronic expansion valve 17 fully open, but the refrigerant of the refrigeration cycle flows in the same direction as the cooling operation.
[0052]
As described above, since the indoor heat exchanger 1 is of a mixed type of the condenser and the evaporator, the cooling and dehumidifying operation can be performed while suppressing the cooling. By opening the bidirectional solenoid valve 10, the auxiliary heat exchanger 1a can be heated, that is, it is possible to give priority to dehumidification.
[0053]
Next, when the heating and dehumidifying operation is set by the remote controller 13, as shown in FIG. 15, the electronic expansion valve 17 is fully opened, the bidirectional solenoid valve 10 is closed, and the pressure reducer 8 is set to the throttle control. The sub heat exchanger 1a and the main heat exchanger 1b are condensers, and the main heat exchanger 1c is the same evaporator as the outdoor heat exchanger 16. That is, contrary to the normal heating operation, the pressure reducing device 8 is throttle-controlled to make the electronic expansion valve 17 fully open, but the refrigerant of the refrigeration cycle flows in the same direction as the heating operation. As described above, since the indoor heat exchanger 1 is of a mixed type of the condenser and the evaporator, the heating and dehumidifying operation can be performed while suppressing a decrease in cooling.
[0054]
When the non-stop heating operation is set by the remote controller 13, the electronic expansion valve 17 is fully opened and the decompressor 8 is fully closed, as shown in FIG. Open 10. Then, the refrigerant flows in the same manner as in the heating operation. Thereby, the refrigerant flows only into the sub heat exchanger 1a of the indoor heat exchanger 1, so that the sub heat exchanger 1a becomes a condenser, and the high-pressure gas refrigerant flows into the outdoor heat exchanger 16.
[0055]
In this case, it is preferable that the main air outlets 3 and 4 are closed with the left and right upper and lower wind direction plates 5 and 6 facing upward, and warm air is blown only from the spot air outlet 2. That is, if a large amount of warm air having a low heating capacity and not so high is blown out, it may be erroneously determined that the air conditioner is abnormal.
[0056]
According to this non-stop heating operation, the heating capacity is reduced, but the defrosting ability of the outdoor heat exchanger 16 can be increased accordingly. In the non-stop heating operation, if a large amount of frost is attached to the outdoor heat exchanger 16, it is difficult to perform the defrost. Therefore, when frost begins to form, it is preferable to perform the non-stop heating operation. For example, the frost formation is determined by monitoring the temperature of the outdoor heat exchanger 16.
[0057]
Further, in the non-stop heating operation, for example, as shown in FIG. 17, spot heating is performed at the start of the operation to minimize the heating capacity. When the defrosting operation is completed and the temperature of the outdoor heat exchanger 16 rises to a predetermined value, for example, as shown in FIG. 18, the spot heating by the above-described spot heating operation is directly applied to a user or the like to quickly warm the user.
[0058]
When a predetermined time has elapsed, as shown in FIG. 19, the upper and lower wind direction plates 5 and 6 are controlled so as to open the closed left and right main air outlets 3 and 4, and also from the outlets 3 and 4. Blow out warm air. Thereby, warm air is also blown out from the left and right, and the indoor environment can be improved.
[0059]
As described above, the indoor unit has a plurality of air outlets, one of which is a spot outlet, and cool air or warm air is blown only from the spot outlet, so that the cool air or warm air is blown to a specific area in the room. (E.g., indoor users) can be focused on, especially for users after bathing so that they can be cooled quickly in summer to give a comfortable feeling, and in winter to warm quickly to prevent hot springs. Can be.
[0060]
In addition, the indoor heat exchanger is divided into a plurality of parts, and a decompressor capable of controlling the throttle is provided therebetween, so that the indoor heat exchanger can be formed into a combination of a condenser and an evaporator, and as a result, dehumidification and dehumidification can be achieved. The efficiency of frost and the like can be improved, and the performance of the air conditioner can be improved.
[0061]
In the above-described embodiment, the indoor unit has one indoor fan. However, for example, a dedicated fan for the spot air outlet 2 may be provided, that is, two indoor fans may be provided. Further, the blower guide tube 2a is not limited to a cylindrical shape, and may be a tube having a square or rectangular cross section.
[0062]
In this case, the spot-dedicated fan may be provided near the spot air outlet 2, for example, inside the indoor unit main body or inside the spot air outlet 2. Regarding the control of the spot dedicated fan, it is preferable that the dedicated fan is also rotated when the indoor fan 7 is rotated so as not to hinder the air flow of the indoor fan 7.
[0063]
【The invention's effect】
As described above, according to the present invention, it is possible to intensively blow out a strong cold air or a hot air to a specific area in a room without obstructing an appropriate temperature control in the room, and the function of the air conditioner. Improvement can be achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an internal structure of an indoor unit according to the present invention.
FIG. 2 is a schematic block diagram showing a refrigeration cycle of the air conditioner of the present invention.
FIG. 3 is a schematic block diagram showing a control device provided in the air conditioner of the present invention.
FIG. 4 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 5 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 6 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 7 is a front view of the indoor unit for explaining the operation of the blower guide tube and the upper and lower wind direction plates controlled by the control device.
FIG. 8 is a front view of the indoor unit for explaining the operation of the blower guide tube and the upper and lower wind direction plates controlled by the control device.
FIG. 9 is a front view of the indoor unit for explaining the operation of the blower guide tube and the upper and lower wind direction plates controlled by the control device.
FIG. 10 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 11 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 12 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 13 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 14 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 15 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 16 is a schematic configuration diagram of a refrigeration cycle for explaining the operation of the control device.
FIG. 17 is a front view of the indoor unit for explaining the operation of the blower guide tube and the upper and lower wind direction plates controlled by the control device.
FIG. 18 is a front view of the indoor unit for explaining the operation of the blower guide tube and the upper and lower wind direction plates controlled by the control device.
FIG. 19 is a front view of the indoor unit for explaining the operation of the blower guide tube and the upper and lower wind direction plates controlled by the control device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Indoor heat exchanger 1a Sub heat exchanger 1b, 1c Main heat exchanger 2 Spot air outlet 2a Blow guide tube 3, 4 Main air outlet 5, 6, Upper and lower wind direction plate 7 Indoor fan 8 Depressurizer 9 Bypass pipe 10 Both Directional solenoid valve 11 Indoor unit control circuit 12 Outdoor unit control circuit 13 Remote controller 14 Four-way valve 15 Compressor 16 Outdoor heat exchanger 17 Electronic expansion valve 18 Outdoor fan 19 Spot expansion / contraction drive

Claims

The indoor heat exchanger is provided with a reversible refrigeration cycle including a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger, and in an air passage connecting an air inlet and an air outlet of the indoor unit. In the air conditioner where is arranged with the indoor fan,
The air outlet is divided into at least three of one spot air outlet and two main air outlets that intensively blows air toward a specific area in the room, and the indoor heat exchanger includes: Is divided into at least three of one sub heat exchanger corresponding to the spot air outlet and two main heat exchangers corresponding to the respective main air outlets,
The main heat exchangers are further connected in series to the sub heat exchanger in a state where they are connected in series via a decompressor,
Between the sub heat exchanger and the expansion valve, a bypass pipeline having an on-off valve is connected in parallel to each of the main heat exchangers,
Control means for controlling at least the indoor decompressor, the on-off valve and the expansion valve,
By the control means, as one of the operation modes of the air conditioner, the refrigerant of the refrigeration cycle is caused to flow only to the sub heat exchanger, and the air conditioned from the spot air outlet is directed to a specific area in the room. An air conditioner characterized by being able to blow out intensively.

2. The air according to claim 1, wherein the spot air outlet is provided with a blower guide tube that has an air blowing area smaller than the main air outlet, expands and contracts in the air blowing direction, and is vertically movable. Harmony machine.

The air conditioner according to claim 1, wherein the spot air outlet is disposed at a center of the air outlet, and the main air outlets are disposed on both sides thereof.

At least a vertical wind direction plate is provided in the main air outlet, and in the specific operation mode, the main air outlet is closed by the vertical wind direction plate to enable concentrated blowing from the spot air outlet. Item 4. The air conditioner according to item 1, 2, or 3.

In the control for intensively blowing out a specific area by the spot air outlet, an instruction is given from the remote controller to the control means, and only the intensive blowout or the upper and lower wind direction plates in the main air outlet are controlled to control the main air outlet. The air conditioner according to any one of claims 1 to 4, wherein it is possible to select whether to blow air from the air conditioner.

In the control of intensive blowing of a specific area by the spot air outlet, the control means, when the intensive blowing time reaches a predetermined value, or when the difference between the room temperature and the set temperature is within a predetermined value, The air conditioner according to any one of claims 1 to 5, wherein the upper and lower wind direction plates in the main air outlet are controlled to apply air from the main air outlet.

In the control for intensively blowing out a specific area by the spot air outlet, the control means opens and closes the on-off valve based on an instruction from a remote controller, either the intensive blowing time or a difference between room temperature and a set temperature. The air conditioner according to any one of claims 1 to 6, wherein the intensive blowing or the general blowing is selected.

The air conditioner according to claim 7, wherein when performing the overall blowing, the control unit further controls opening and closing of the pressure reducer.

In the cooling and dehumidifying operation mode, the control means closes the on-off valve, fully opens the expansion valve, and controls the depressurizer by restricting the sub-heat exchanger and the main heat exchanger. Also, the main heat exchanger on the side of the sub heat exchanger is an evaporator, the remaining main heat exchanger is the same condenser as the outdoor heat exchanger, and cold air is blown from the air outlet. 9. The air conditioner according to any one of 8 above.

In the heating and dehumidifying operation mode, the control means closes the on-off valve means, fully opens the expansion valve, controls the throttle of the decompressor, and controls the depressurizer of the sub heat exchanger and the main heat exchanger. The main heat exchanger on the side of the sub heat exchanger is a condenser, the remaining main heat exchanger is the same evaporator as the outdoor heat exchanger, and hot air is blown out from the air outlet. 9. The air conditioner according to any one of 1 to 8.

In the defrosting operation mode, the control means opens the valve means, closes the decompressor, allows the refrigerant to flow only to the sub-indoor heat exchanger via the bypass pipe, and moves the refrigerant up and down in the main air outlet. The air conditioner according to any one of claims 1 to 8, wherein a wind direction plate is closed and hot air is blown out only from the spot air outlet.

A cylinder driving means for driving a blowing guide cylinder provided in the spot air outlet in a predetermined direction, and driving the cylinder driving means in response to an operation of a remote controller to control the length and / or length of the blowing guide cylinder; The air conditioner according to any one of claims 1 to 11, wherein the direction is adjustable.

The air conditioner according to any one of claims 1 to 12, further comprising, as the indoor fan, a cross flow fan dedicated to the spot air outlet, separately from the cross flow fan for the main air outlet.