JP4275325B2

JP4275325B2 - Air conditioner

Info

Publication number: JP4275325B2
Application number: JP2001127028A
Authority: JP
Inventors: 亮一高藤; 啓夫中村; 正之野中
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2001-04-25
Filing date: 2001-04-25
Publication date: 2009-06-10
Anticipated expiration: 2021-04-25
Also published as: JP2002323266A

Description

【０００１】
【発明の属する技術分野】
本発明は、空気調和機に係わり、特に冷凍サイクルの凝縮熱で室内空気を加熱する除湿運転が可能な空気調和機に好適なものである。
【０００２】
【従来の技術】
従来の空気調和機としては、特開昭５４−４７３５３公報に示されているように、冷房、暖房、冷房ぎみ除湿運転及び暖房ぎみ除湿運転を可能とし、除湿運転中の室内の温度上昇あるいは温度低下を防止し、任意の温度を保ちながら除湿を行なうことを目的として、圧縮機、室外熱交換器、熱的に二分割された室内熱交換器、室外熱交換器と室内熱交換器の間に配置されて冷房運転時及び暖房運転時に絞り作用を行う冷暖房用絞り装置、二分割された室内熱交換器の間に配置されて除湿運転時に絞り作用を行う除湿用絞り装置、及び圧縮機と室外熱交換器及び室内熱交換器との間に配置されて圧縮機から出た冷媒を室外熱交換器に導く冷房サイクルと室内熱交換器に導く暖房サイクルとに切換える運転切換弁を備え、室内熱交換器を蒸発器、室外熱交換器を凝縮器とした冷房運転と、室内熱交換器を凝縮器、室外熱交換器を蒸発器とした暖房運転と、冷房サイクル時に、室内熱交換器の一方を蒸発器、他方を凝縮器、室外熱交換器を凝縮器とする冷房ぎみ除湿運転と、暖房サイクル時に、室内熱交換器の一方を凝縮器、他方を蒸発器、室外熱交換器を蒸発器とする暖房ぎみ除湿運転とに切換え可能とするようにしたものがある。
【０００３】
そして、この空気調和機の制御方法として、冷房運転、暖房運転、冷房ぎみ除湿運転及び暖房ぎみ除湿運転の４つの運転を任意に選択することができるようにすること、或いは室温がサーモスタット等の設定値より高い際には冷房ぎみ除湿運転、低い時には暖房ぎみ除湿運転に自動的に切換えることが示されている。
【０００４】
【発明が解決しようとする課題】
しかし、係る従来の空気調和機においては、冷房運転と冷房ぎみ除湿運転との自動切換え、或いは暖房運転と暖房ぎみ除湿運転との自動切換えに関して開示されておらず、快適な運転を自動的に得ることができないという課題があった。また、室外温度に基づく制御に関して開示されておらず、室外温度が低く室内の暖房負荷が大きい場合に適切な除湿運転を自動的に得ることができないという課題があった。また、暖房ぎみ除湿運転を選択した場合の具体的な制御方法までは開示されておらず、暖房ぎみ除湿運転の選択時に暖房ぎみ除湿運転と冷房ぎみ除湿運転を適正に自動切換えすることについては配慮されていなかった。また、暖房ぎみ除湿運転時に圧縮機の回転数を制御することについては開示されておらず、暖房ぎみ除湿運転時にユーザーが希望する設定室内温度に短時間で室内温度を到達させることについては配慮されていなかった。また、暖房ぎみ除湿運転時に除湿用絞り装置の絞り量を制御することについては開示されておらず、暖房ぎみ除湿運転時にユーザーが希望する設定室内湿度に短時間で室内湿度を到達させることについては配慮されていなかった。
【０００５】
本発明の目的は、設定室内温度に短時間で室内温度を到達させる運転を行なって、素早く快適な室内環境にすることができる空気調和機を得ることにある。
【０００８】
本発明の別の目的は、暖房サイクル除湿運転時に設定室内温度に短時間で室内温度を到達させる除湿運転を行なって、素早く快適な室内環境にすることができる空気調和機を得ることにある。
【０００９】
本発明の別の目的は、暖房サイクル除湿運転時に設定室内湿度に短時間で室内湿度を到達させる除湿運転を行なって、素早く快適な室内環境にすることができる空気調和機を得ることにある。
【００１０】
【課題を解決するための手段】
上記目的を達成するための本発明の代表的な発明の１つである空気調和機は圧縮機、室外熱交換器、熱的に二分割された室内熱交換器、前記室外熱交換器と前記室内熱交換器の間に配置されて冷房運転時及び暖房運転時に絞り作用を行う冷暖房用絞り装置、前記二分割された室内熱交換器の間に配置されて除湿運転時に絞り作用を行う除湿用絞り装置、前記圧縮機と前記室外熱交換器及び前記室内熱交換器との間に配置されて前記圧縮機から出た冷媒を前記室外熱交換器に導く冷房サイクルと前記室内熱交換器に導く暖房サイクルとに切換える運転切換弁、及び前記除湿用絞り装置と前記運転切換弁を制御する制御装置を備え、前記制御装置は、前記室内熱交換器を蒸発器、前記室外熱交換器を凝縮器とした冷房運転と、前記室内熱交換器を凝縮器、前記室外熱交換器を蒸発器とした暖房運転と、前記冷房サイクルにおける前記室内熱交換器の一方を蒸発器、他方を凝縮器、前記室外熱交換器を凝縮器とする冷房サイクル除湿運転と、前記暖房サイクルにおける前記室内熱交換器の一方を凝縮器、他方を蒸発器、前記室外熱交換器を蒸発器とする暖房サイクル除湿運転とに切換える機能を有すると共に、自動運転モードにおいて、設定室内温度と室内温度との高低に基づいて前記冷房サイクルと前記暖房サイクルとを自動的に切換え、その切換えられた冷房サイクルで、設定室内温度と室内温度との差に基づいて、前記冷房運転と前記冷房サイクル除湿運転とを自動的に切換え、その切換えられた暖房サイクルで前記暖房運転と前記暖房サイクル除湿運転とを自動的に切換える機能を有する。
【００１１】
【発明の実施の形態】
以下、本発明の各実施例を図に基づいて説明する。なお、第２実施例以降の実施例においては、第１実施例と共通する部分の図示及び重複する説明を省略すると共に、各実施例と同一物又は相当物について第１実施例に用いた符号を引用して説明する。
【００１２】
本発明の第1実施例の空気調和機を図１から図３を用いて説明する。
【００１３】
まず、本実施例の空気調和機の構成を図１を参照しながら説明する。図１は本発明の第１実施例の空気調和機の構成図である。
【００１４】
図１において、冷凍サイクルは、圧縮機１、室外熱交換器３、熱的に二分割された室内熱交換器５、室外熱交換器３と室内熱交換器５との間に配置されて冷房運転時及び暖房運転時に絞り作用を行う冷暖房用絞り装置を構成している絞り量可変の冷暖房用膨張弁４、第１室内熱交換器５ａと第２室内熱交換器５ｂとの間に配置されて除湿運転時に絞り作用を行う除湿用絞り装置を構成している絞り量可変の除湿用膨張弁６、圧縮機１と室外熱交換器３及び室内熱交換器５との間に配置されて圧縮機１から出た冷媒を室外熱交換器３に導く冷房サイクルと室内熱交換器５に導く暖房サイクルとに切換える運転切換弁を構成している四方弁２を、冷媒配管にて接続して構成されている。
【００１５】
圧縮機１は、容量可変型圧縮機であり、制御装置５０によりインバータ制御される。そして、室外送風ファン７は、室外空気を室外熱交換器３に強制的に通風するように設置されている。また、室内送風ファン８は室内空気を室内熱交換器５に強制的に通風するように設置されている。この室内送風ファン８の運転により、室内空気は第１室内熱交換器５ａと第２室内熱交換器５ｂに並列に吸込まれ、これから出た空気が混合されて室内送風ファン８から室内に吹出されるようになっている。
【００１６】
リモコン４９は、希望する運転モードを任意に設定及び運転モードを自動切換えに設定する設定ボタン、希望する室内温度に設定する設定ボタン、希望する室内湿度に設定する設定ボタン、及びその他各種の運転状態を設定する設定ボタン等を備えている。
【００１７】
制御装置５０は、リモコン４９や、室外温度センサ９、室内温度センサ１０及び室内湿度センサ１１等の各種センサからの信号に基づいて、圧縮機１、四方弁２、冷暖房用膨張弁４、除湿用膨張弁６及び室外送風ファン７等を制御するものである。室外温度センサ９は室外熱交換器３の吸込み空気温度を検出するように設置され、室内温度センサ１０は室内熱交換器５の吸込み空気温度を検出するように設置され、室内湿度センサ１１は室内熱交換器５の吸込み空気湿度を検出するように設置されている。
【００１８】
制御装置５０は、リモコン４９で選択された運転モードの信号に応じて、例えば、図２に示すように四方弁２を切換え、冷暖房用膨張弁４及び除湿用膨張弁６の絞りを制御する。
【００１９】
係る４つの運転モードをリモコン４９により任意に選択する場合の動作について図２を参照しながら説明する。図２は本発明の第１実施例の空気調和機の各運転モードの動作説明図である。
【００２０】
図２に示すように、リモコン４９で選択された運転モードが、冷房運転である時は、圧縮機１を出た冷媒が室外熱交換器３へ流れる冷房サイクルを構成するように四方弁２を切換え、冷暖房用膨張弁４を絞ると共に、除湿用膨張弁６を全開にする。また、リモコン４９で選択された運転モードが、暖房運転である時は、圧縮機１を出た冷媒が室内熱交換器５へ流れる暖房サイクルを構成するように四方弁２を切換え、冷暖房用膨張弁４を絞ると共に、除湿用膨張弁６を全開にする。また、リモコン４９で選択された運転モードが、冷房サイクル除湿運転である時は、圧縮機１を出た冷媒が室外熱交換器３へ流れる冷房サイクルを構成するように四方弁２を切換え、冷暖房用膨張弁４を全開にすると共に、除湿用膨張弁６を絞る。また、リモコン４９で選択された運転モードが、暖房サイクル除湿運転である時は、圧縮機１を出た冷媒が室内熱交換器５ｂへ流れる暖房サイクルを構成するように四方弁２を切換え、冷暖房用膨張弁４を全開にすると共に、除湿用膨張弁６を絞る。
【００２１】
この制御動作をさらに具体的に説明する。ユーザーが冷房運転モードを選択した場合、制御装置５０は、リモコン４９からの冷房運転モードの信号を受信し、除湿用膨張弁６を全開にし、冷暖房用膨張弁４を絞る信号を送信し、室外熱交換器３を凝縮器、室内熱交換器５を蒸発器として作用させる。これにより、室内へは室内熱交換器５で冷却された空気が送風され、冷房運転が行なわれる。
【００２２】
また、ユーザーが暖房運転モードを選択した場合、制御装置５０は、リモコン４９からの暖房運転モードの信号を受信し、除湿用膨張弁６を全開にし、冷暖房用膨張弁４を絞る制御を行ない、室外熱交換器３を蒸発器、室内熱交換器５を凝縮器として作用させる。これにより、室内へは室内熱交換器５で加熱された空気が送風され、暖房運転が行なわれる。
【００２３】
また、ユーザーが冷房サイクル除湿運転モードを選択した場合、制御装置５０は、リモコン４９からの冷房サイクル除湿運転モードの信号を受信し、圧縮機１を出た冷媒が室外熱交換器３に流れるように四方弁２を切換え、冷暖房用膨張弁４を全開にし、除湿用膨張弁６を絞る制御を行う。これにより、圧縮機１で圧縮された高温高圧の冷媒ガスは、四方弁２から室外熱交換器３及び全開の冷暖房用膨張弁４を通って、第１室内熱交換器５ａで室内送風ファン８により送風される空気に放熱して凝縮し、除湿用膨張弁６で絞られ、室内空気の露点温度以下の温度まで膨張し、第２室内熱交換器５ｂで室内送風ファン８により送風される空気から吸熱して蒸発し、四方弁２を通り、再び圧縮機１へ戻る。この時、室内へは第１室内熱交換器５ａで加熱された空気と第２室内熱交換器５ｂで冷却減湿された空気とが混合されて送風され、冷房サイクル除湿運転が行なわれる。
【００２４】
また、ユーザーが暖房サイクル除湿運転モードを選択した場合、制御装置５０は、リモコン４９からの暖房サイクル除湿運転モードの信号を受信し、圧縮機１を出た冷媒が室内熱交換器５に流れるように四方弁２を切換え、除湿用膨張弁６を絞り、冷暖房用膨張弁４を全開にする制御を行う。これにより、圧縮機１で圧縮された高温高圧の冷媒ガスは、四方弁２を通り、第２室内熱交換器５ｂで室内送風ファン８により送風される空気に放熱して凝縮し、除湿用膨張弁６で絞られ、第１室内熱交換器５ａで室内送風ファン８により送風される空気から吸熱して蒸発し、全開の冷暖房用膨張弁４及び室外熱交換器３を経て四方弁２を通り、再び圧縮機１へ戻る。この時、室内へは第２室内熱交換器５ｂで加熱された空気と第１室内熱交換器５ａで冷却減湿された空気とが混合されて送風され、暖房サイクル除湿運転が行われる。
【００２５】
以上のように、ユーザーの設定した運転モードに応じて、冷房、暖房、冷房サイクル除湿、暖房サイクル除湿の運転モードを任意に選択できるので、室内の環境をユーザーの好みに合った状態にすることができる。
【００２６】
次に、上述した４つの運転モードをリモコン４９により自動的に切換える場合の動作について図３を参照しながら説明する。図３は本発明の第１実施例の空気調和機の自動運転モードの選択時の動作フローチャート図である。
【００２７】
自動運転を行なう場合には、ユーザーは、図３に示すように、リモコン４９の自動運転モードボタンを選択して自動運転を開始する（ステップ８１）。これにより、圧縮機１が駆動して冷媒が冷凍サイクル中を循環すると共に、室外送風ファン７が駆動して室外空気が室外熱交換器３に通風され、室内送風ファン８が駆動して室内空気が室内熱交換器５に通風され、空気調和機が運転される。
【００２８】
そして、リモコン４９の室内温度設定ボタンを押して希望する室内温度Ｔｉｓを設定する（ステップ８２）。なお、制御装置５０内にあらかじめ定められた設定室内温度Ｔｉｓの標準設定値を有しており、室内温度設定ボタンで設定室内温度Ｔｉｓが設定されない場合には、この標準設定値が用いられる。この点については、第２実施例以降も同様である。
【００２９】
そして、室内温度センサ１０により室内温度を検出し（ステップ８５）、設定室内温度Ｔｉｓと室内温度Ｔｉとを比較する（ステップ８６）。この比較で、設定室内温度Ｔｉｓ＜室内温度Ｔｉである場合にはステップ９０に進み、そうでない場合にはステップ９５に進む。
【００３０】
ステップ９０において、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉが所定の温度差（第１設定温度差Δｔ１）より大きいか否かを判定する。この判定で、その差が第１設定温度差Δｔ１より大きい場合には冷房運転を行ない（ステップ９１）、ステップ８２に戻る。また、ステップ９０の判定で、小さい場合には冷房サイクル除湿運転を行ない、ステップ８２に戻る。なお、第１設定温度差Δｔ１は冷房運転と冷房サイクル除湿運転との切換えに適した冷房サイクルにおける特有の温度差にあらかじめ設定され、後述する第２設定温度差Δｔ２とは異なっている。
【００３１】
ステップ９５において、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉが所定の温度差（第２設定温度差Δｔ２）より小さいか否かを判定する。この判定で、その差が第２設定温度差Δｔ２より小さい場合には暖房サイクル除湿運転を行ない（ステップ９６）、ステップ８２に戻る。また、ステップ９５の判定で、大きい場合には暖房運転を行ない、ステップ８２に戻る。なお、第２設定温度差Δｔ２は暖房運転と暖房サイクル除湿運転との切換えに適した暖房サイクルにおける特有の温度差に設定され、前述した第１設定温度差Δｔ１とは異なっている。
【００３２】
このように、本実施例によれば、冷房運転、暖房運転、冷房サイクル除湿運転及び暖房サイクル除湿運転を設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉに基づいて自動的に切換えるようにしているので、ユーザーが希望する設定室内温度に短時間で室内温度を到達させ、快適な室内環境にすることができる。また、本実施例によれば、特に、設定室内温度Ｔｉｓと室内温度Ｔｉとを比較して冷房サイクルと暖房サイクルとを自動的に切換えると共に、冷房サイクルでは冷房運転と冷房サイクル除湿運転との切換えに適した第１設定温度差Δｔ１により自動的に切換え、暖房サイクルでは暖房運転と暖房サイクル除湿運転との切換えに適した第２設定温度差Δｔ２により自動的に切換えるようになっているので、より一層短時間でユーザーが希望する設定室内温度Ｔｉｓに室内温度Ｔｉを到達させ、快適な室内環境にすることができる。なお、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉに加えて、例えば室外温度等の条件を加えて制御するようにしても上述の効果を得ることができると共に、室外温度に対応した適切な制御を行なうことができる。
【００３３】
次に、参考例１を図４を用いて説明する。図４は参考例１の空気調和機のサイクル除湿運転の動作フローチャート図である。参考例１は、次に述べるように第１実施例と相違しており、その他の点については参考例１と同じであり、図１に相当する図示及びその説明を省略する。
【００３４】
参考例１では、制御装置５０は、サイクル除湿運転時に、室外温度センサ９で検出した室外温度Ｔｏ及び設定室外温度Ｔｏｓに基づいて、以下に述べるように四方弁２及び冷暖房用膨張弁４を制御する。
【００３５】
サイクル除湿運転は、リモコン４９にサイクル除湿運転モードボタンを設けてこれを選択した場合と、自動運転モードにおけるサイクル除湿運転を行なう条件になった場合に、その運転が開始される（ステップ１００）。なお、この自動運転モードは、冷房運転、暖房運転及びサイクル除湿運転の３つの運転モードを自動的に切換えるようにし、上述した第１実施例の冷房サイクル除湿運転及び暖房サイクル除湿運転に切換わる条件でサイクル除湿運転に切換わるようになっている。
【００３６】
このサイクル除湿運転を開始すると、制御装置５０により除湿用膨張弁６を絞る（ステップ１０１）。そして、室外温度センサ９により室外温度Ｔｏを検出し、検出値を制御装置５０へ送る（ステップ１０２）。そして、この室外温度Ｔｏがあらかじめ定められた温度Ｔｏｓより低いか否かを判定する(ステップ１０３)。この判定で、室外温度Ｔｏ＜設定室外温度Ｔｏｓである場合にはステップ１０４に進み、そうでない場合にはステップ１０７に進む。この設定室外温度Ｔｏｓは例えば１５℃に設定されている。なお、リモコン４９等によりこの設定室外温度Ｔｏｓを変更できるようにすれば、空気調和機が設置された地域に合致した設定室外温度Ｔｏｓを設定することができ、より適切な制御をすることができる。
【００３７】
ステップ１０４において、圧縮機１を出た冷媒が室内熱交換器５の方向へ流れるように四方弁２を切換える。次いで、冷暖房用膨張弁４を開く制御を行ない（ステップ１０５）、ステップ１０３に戻る。このステップ１０４及び１０５により、サイクル除湿運転の中の暖房サイクル除湿運転が行なわれる。
【００３８】
一方、ステップ１０７において、圧縮機１を出た冷媒が室外熱交換器３の方向へ流れるように四方弁２を切換える。次いで、冷暖房用膨張弁４を開く制御を行ない（ステップ１０８）、ステップ１０３に戻る。このステップ１０７及び１０８により、サイクル除湿運転の中の冷房サイクル除湿運転が行なわれる。
【００３９】
参考例１では、室外温度Ｔｏに基づいて暖房サイクル除湿運転と冷房サイクル除湿運転を自動的に切換えるように制御するので、室外温度Ｔｏが低く、室内の暖房負荷が大きい冬期（例えば室外温度が０℃のように温度が低い場合）において、凝縮を室内の熱交換器５ｂだけで行う暖房サイクル除湿運転を行なうことができ、十分な加熱量が確保され、室内温度を低下させない除湿運転を行うことができる。また、室外温度Ｔｏが高く、室内冷房負荷が大きい夏期（例えば室外温度が３５℃のように高湿で温度が高い場合）において、蒸発を室内の熱交換器５ｂのみで行なう冷房サイクル除湿運転を行なうことができ、十分な冷却、減湿量が確保され、室内温度を上昇させない除湿運転を行なうことができる。このようにして、効率よく快適な室内環境にすることができる。
【００４０】
次に、参考例２を図５を用いて説明する。図５は参考例２の空気調和機の暖房サイクル除湿運転モード選択時の動作フローチャート図である。参考例２は、次に述べるように第１実施例と相違しており、その他の点については第１実施例と同じであり、図１に相当する図示及びその説明を省略する。
【００４１】
参考例２では、制御装置５０は、暖房サイクル除湿運転モード選択時に、室内温度センサ１０で検出した室内温度Ｔｉ、ユーザーが設定する、あるいはあらかじめ定められた設定室内温度Ｔｉｓ及びあらかじめ設定された設定温度差ｄｔ３に基づいて、以下に述べるように四方弁２、冷暖房用膨張弁４及び除湿用膨張弁６を制御する。
【００４２】
ユーザーが暖房サイクル除湿運転モードを選択するには、リモコン４９の暖房サイクル除湿運転モードボタンを選択する（ステップ２０１）。これにより、圧縮機１が駆動すると共に四方弁２が暖房サイクル側に移動して冷媒が冷凍サイクル中を循環し、室外送風ファン７が駆動して室外空気が室外熱交換器３に通風されると共に室内送風ファン８が駆動して室内空気が室内熱交換器５に通風され、暖房サイクル除湿運転が行われる。
【００４３】
そして、ユーザーがリモコン４９の室内温度設定ボタンを押して希望する室内温度Ｔｉｓを設定する（ステップ２０２）。室内温度センサ１０により室内温度Ｔｉを検出し、検出値を制御装置５０に送る（ステップ２０３）。次いで、この室内温度Ｔｉが設定室内温度Ｔｉｓより大きいか否かを判定する(ステップ２０４)。この判定で、室内温度Ｔｉ＞設定室内温度Ｔｉｓでない場合には暖房サイクル除湿運転を継続し（ステップ２５）、ステップ２０２に戻る。このようにして、室内温度Ｔｉ＞設定室内温度Ｔｉｓになるまで暖房サイクル除湿運転を継続する。ステップ２０４の判定で、室内温度Ｔｉ＞設定室内温度Ｔｉｓになった場合にはステップ２０６に進む。
【００４４】
ステップ２０６において、室内温度Ｔｉと設定室内温度Ｔｉｓとの差Ｔｉ−Ｔｉｓがあらかじめ定められた所定の温度差（第３設定温度差ｄｔ３）より大きいか否かを判定する。この判定で、室内温度Ｔｉと設定室内温度Ｔｉｓとの差Ｔｉ−Ｔｉｓが第３設定温度差ｄｔ３より大きくない場合にはステップ２０７の冷房サイクル除湿運転側に進み、大きい場合にはステップ２１０の暖房サイクル除湿運転側に進む。この第３設定温度差ｄｔ３を例えば５℃に設定してある。
【００４５】
暖房サイクル除湿運転側においては、圧縮機１を出た冷媒が室内熱交換器５の方向へ流れるように四方弁２を切換え（ステップ２０７）、冷暖房用膨張弁４を開く制御を行うと共に（ステップ２０８）、除湿用膨張弁６を絞る制御を行ない（ステップ２０９）、ステップ２０６に戻る。このステップ２０７〜２０９により、暖房サイクル除湿運転が行なわれ、室内温度を上昇させながら除湿が行われる。
【００４６】
この暖房サイクル除湿運転により、室内温度Ｔｉと設定室内温度Ｔｉｓとの差Ｔｉ−Ｔｉｓが第３設定温度差ｄｔ３より大きくなった場合には、上述したように冷房サイクル除湿運転側に切換わる。この冷房サイクル除湿運転側においては、圧縮機１を出た冷媒が室外熱交換器３の方向へ流れるように四方弁２を切換え（ステップ２１０）、冷暖房用膨張弁４を開く制御を行うと共に（ステップ２１１）、除湿用膨張弁６を絞る制御を行ない（ステップ２１２）、ステップ２０６に戻る。このステップ２１０〜２１２により、冷房サイクル除湿運転が行なわれ、室内温度Ｔｉを下げながら除湿が行なわれる。
【００４７】
この冷房サイクル除湿運転により、室内温度Ｔｉと設定室内温度Ｔｉｓとの差Ｔｉ−Ｔｉｓが第３設定温度差ｄｔ３より大きくなくなった場合には、上述したようにステップ２０７の暖房サイクル除湿運転側に切換わり、以後、暖房サイクル除湿運転と冷房サイクル除湿運転との切換が繰り返される。
【００４８】
参考例２によれば、ユーザーがリモコン４９の暖房サイクル除湿運転モードボタンを選択した場合には、室内温度Ｔｉと設定室内温度Ｔｉｓとの差Ｔｉ−Ｔｉｓが第３設定温度差ｄｔ３より大きくなるまで暖房サイクル除湿運転を行なうと共に、冷房サイクル除湿運転と自動的に切換えるので、暖房サイクル除湿運転モード選択時に、加熱効率に優れた暖房サイクル除湿運転と冷却効率に優れた冷房サイクル除湿運転を適正に自動的に切換えことができ、快適な室内環境に制御することができる。
【００４９】
次に、本発明の第４実施例を図６から図８を用いて説明する。図６は本発明の第４実施例の空気調和機の暖房サイクル除湿運転時の動作フローチャート図、図７は同空気調和機における圧縮機回転数の温度特性図、図８は同空気調和機の変形例における圧縮機回転数の湿度特性図である。本実施例は、次に述べるように第１実施例と相違しており、その他の点については第１実施例と同じであり、図１に相当する図示及びその説明を省略する。
【００５０】
本実施例では、制御装置５０は、暖房サイクル除湿運転時に、室内温度センサ１０で検出した室内温度Ｔｉ及びユーザーが設定する設定室内温度Ｔｉｓに基づいて、以下に述べるように容量可変型圧縮機１の容量を制御する。
【００５１】
ユーザーが暖房サイクル除湿運転を行なうには、リモコン４９の暖房サイクル除湿運転モードボタンを選択する（ステップ３００）。これにより、圧縮機１が駆動すると共に四方弁２が暖房サイクル側に移動して冷媒が冷凍サイクル中を循環し、室外送風ファン７が駆動して室外空気が室外熱交換器３に通風されると共に室内送風ファン８が駆動して室内空気が室内熱交換器５に通風され、暖房サイクル除湿運転が行われる。
【００５２】
そして、ユーザーがリモコン４９の室内温度設定ボタンを押して希望する室内温度Ｔｉｓを設定する（ステップ３０１）。室内温度センサ１０により室内温度Ｔｉを検出し、検出値を制御装置５０に送る（ステップ３０２）。次いで、この室内温度Ｔｉが設定室内温度Ｔｉｓより低いか否か（Ｔｉ＜Ｔｉｓか否か）を判定する（ステップ３０３）。この判定で、室内温度Ｔｉが設定室内温度Ｔｉｓより低い場合には圧縮機１の回転数を増速し（ステップ３０４）、ステップ３０１に戻る。この圧縮機１の回転数を増速する運転を室内温度Ｔｉが設定室内温度Ｔｉｓ以上になるまで継続する。
【００５３】
この動作をさらに具体的に説明すると、例えばユーザーの設定室内温度Ｔｉｓが２５℃、室内温度Ｔｉが１８℃で暖房サイクル除湿運転が開始された場合、室内温度Ｔｉ＜設定室内温度Ｔｉｓであるので、制御装置５０は圧縮機１の回転数を図７に基づいて増速させる。即ち、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉの大きさに比例して圧縮機回転数を増速させる。この圧縮機１の回転数の増速により、冷媒循環量が増加し、蒸発器である室外熱交換器３及び第１室内熱交換器５ａでの吸熱量が増加するので、凝縮器である第２室内熱交換器５ｂでの放熱量が増加する。従って、室外熱交換器３で増加した吸熱量分だけ室内への放熱量が増加する。
【００５４】
上述したステップ３０３の判定で、室内温度Ｔｉが設定室内温度Ｔｉｓ以上であった場合には、圧縮機１の回転数を減速し（ステップ３０５）、ステップ３０１に戻る。この容量可変型圧縮機１の回転数を減速する運転を室内温度Ｔｉが設定室内温度Ｔｉｓより低くなるまで継続する。
【００５５】
この動作をさらに具体的に説明すると、例えばユーザーの設定室内温度Ｔｉｓが１０℃、室内温度Ｔｉが１８℃で暖房サイクル除湿運転が開始された場合、室内温度Ｔｉ＜設定室内温度Ｔｉｓでないので、制御装置５０は圧縮機１の回転数を図７に基づいて減速させる。即ち、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉの大きさに比例して圧縮機回転数を減速させる。この圧縮機１の回転数の減速により、冷媒循環量が減少し、蒸発器である室外熱交換器３及び第１室内熱交換器５ａでの吸熱量が減少するので、凝縮器である第２室内熱交換器５ｂでの放熱量が減少する。従って、室外熱交換器３で減少した吸熱量分だけ室内への放熱量が減少する。
【００５６】
本実施例では、暖房サイクル除湿運転時に、ユーザーが設定した設定室内温度Ｔｉｓと室内温度Ｔｉを比較して圧縮機１の回転数を制御することにより、ユーザーが希望する設定室内温度Ｔｉｓに短時間で室内温度Ｔｉを到達させ、快適な室内環境にすることができる。
【００５７】
尚、本実施例では、室内温度Ｔｉを検出して圧縮機回転数を制御したが、圧縮機回転数を変化させると、蒸発器である第１室内熱交換器５ａの温度も変化するので、この特性を利用して、室内温度Ｔｉではなく室内湿度ＲＨｉを検出して圧縮機回転数を制御させてもよい。この場合、室内湿度センサ１１により検出した室内湿度をＲＨｉ、ユーザーが設定した設定室内湿度をＲＨｉｓとした場合に、図８に示すように、設定室内湿度をＲＨｉｓと室内湿度ＲＨｉとの差ＲＨｉｓ−ＲＨｉに比例して圧縮機回転数を制御すればよい。その具体的動作は、図６における設定室内温度Ｔｉｓを設定室内湿度をＲＨｉｓに、室内温度Ｔｉを室内湿度ＲＨｉに変更したものと同じであるので、フローチャート図及び説明を省略する。
【００５８】
次に、本発明の第５実施例を図９を用いて説明する。図９は本発明の第５実施例の空気調和機の暖房サイクル除湿運転時の動作フローチャート図である。本実施例は、次に述べるように第１実施例と相違しており、その他の点については第１実施例と同じであり、図１に相当する図示及びその説明を省略する。
【００５９】
本実施例では、制御装置５０は、暖房サイクル除湿運転時に、室内湿度センサ１１で検出した室内湿度ＲＨｉ及びユーザーが設定する設定室内湿度ＲＨｉｓに基づいて、以下に述べるように除湿用膨張弁６の絞り量を制御する。
【００６０】
ユーザーが暖房サイクル除湿運転を行なうには、リモコン４９の暖房サイクル除湿運転モードボタンを選択する（ステップ４００）。これにより、圧縮機１が駆動すると共に四方弁２が暖房サイクル側に移動して冷媒が冷凍サイクル中を循環し、室外送風ファン７が駆動して室外空気が室外熱交換器３に通風されると共に室内送風ファン８が駆動して室内空気が室内熱交換器５に通風され、暖房サイクル除湿運転が行われる。
【００６１】
そして、ユーザーがリモコン４９の室内湿度設定ボタンを押して希望する室内湿度ＲＨｉｓを設定する（ステップ４０１）。室内湿度センサ１１により室内湿度ＲＨｉを検出し、検出値を制御装置５０に送る（ステップ４０２）。次いで、この室内湿度ＲＨｉが設定室内湿度ＲＨｉｓに等しいか否か（ＲＨｉ＝ＲＨｉｓか否か）を判定する(ステップ４０３)。この判定で、室内湿度ＲＨｉが設定室内湿度ＲＨｉｓに等しい場合にはステップ４０１に戻る。
【００６２】
ステップ４０３の判定で、室内湿度ＲＨｉが設定室内湿度ＲＨｉｓ以上であった場合には、除湿用膨張弁６の絞り量を制御し（ステップ４０４）、ステップ４０１に戻る。この除湿用膨張弁６の絞り量の制御を室内湿度ＲＨｉが設定室内湿度ＲＨｉｓに等しくなるまで継続する。
【００６３】
この動作をさらに具体的に説明すると、例えばユーザーの設定室内湿度ＲＨｉｓが４０％、室内湿度ＲＨｉが７０％で暖房サイクル除湿運転が開始された場合、ＲＨｉ＞ＲＨｉｓであるので、制御装置５０は除湿用絞り弁６を絞る。これにより蒸発器である第１室内熱交換器５ａの温度が低下するので、第１室内熱交換器５ａでの除湿量が増加し、室内湿度ＲＨｉは設定室内湿度ＲＨｉｓに短時間で到達する。
【００６４】
本実施例では、暖房サイクル除湿運転時に、ユーザーが設定した室内設定湿度ＲＨｉｓと室内湿度ＲＨｉを比較して除湿用膨張弁６の絞り量を制御することにより、ユーザーが希望する設定室内湿度ＲＨｉｓに短時間で室内湿度ＲＨｉを到達させ、快適な室内環境にすることができる。
【００６５】
次に、本発明の第６実施例を図１０を用いて説明する。図１０は本発明の第６実施例の空気調和機の暖房サイクル除湿運転時の動作フローチャート図である。本実施例は、次に述べるように第１実施例と相違しており、その他の点については第１実施例と同じであり、図１に相当する図示及びその説明を省略する。
【００６６】
本実施例では、制御装置５０は、暖房サイクル除湿運転時に、室内温度センサ１０で検出した室内温度Ｔｉ、ユーザーが設定する設定室内温度Ｔｉｓ及びあらかじめ設定された設定温度差ｄｔ４に基づいて、以下に述べるように冷暖房用膨張弁４及び除湿用膨張弁６を制御する。
【００６７】
ユーザーが暖房サイクル除湿運転を行なうには、リモコン４９の暖房サイクル除湿運転モードボタンを選択する（ステップ５００）。これにより、圧縮機１が駆動すると共に四方弁２が暖房サイクル側に移動して冷媒が冷凍サイクル中を循環し、室外送風ファン７が駆動して室外空気が室外熱交換器３に通風されると共に室内送風ファン８が駆動して室内空気が室内熱交換器５に通風され、暖房サイクル除湿運転が行われる。
【００６８】
そして、ユーザーがリモコン４９の室内温度設定ボタンを押して希望する室内温度Ｔｉｓを設定する（ステップ５０１）。室内温度センサ１０により室内温度Ｔｉを検出し、検出値を制御装置５０に送る（ステップ５０２）。次いで、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉがあらかじめ定められた所定の温度差（第４設定温度差ｄｔ４）より大きいか否かを判定する。この判定で、設定室内温度Ｔｉｓと室内温度Ｔｉとの差Ｔｉｓ−Ｔｉが第４設定温度差ｄｔ４より大きい場合にはステップ５０４の暖房運転側に進み、大きくない場合にはステップ５０６の暖房サイクル除湿運転側に進む。本実施例では、この第４設定温度差ｄｔ４を１０℃に設定してある。
【００６９】
暖房運転側においては、冷暖房用膨張弁４を絞る制御を行うと共に（ステップ５０４）、除湿用膨張弁６を開く制御を行ない（ステップ５０５）、ステップ５０１に戻る。このステップ５０４、５０５により、暖房運転が行なわれる。また、暖房サイクル除湿運転側においては、冷暖房用膨張弁４を開く制御を行うと共に（ステップ５０６）、除湿用膨張弁６を絞る制御を行ない（ステップ５０７）、ステップ５０１に戻る。このステップ５０６、５０７により、暖房サイクル除湿運転が行なわれ、室内温度Ｔｉを上昇させながら除湿が行われる。
【００７０】
この動作をさらに具体的に説明すると、例えばユーザーの設定室内温度Ｔｉｓが３０℃、室内温度Ｔｉが１２℃で暖房サイクル除湿運転が開始された場合、Ｔｉｓ−Ｔｉ＞ｄｔ４であるので、制御装置５０は冷暖房用膨張弁４を絞り、除湿用膨張弁６を開く。これにより、冷媒は除湿用膨張弁６で絞られることなく室内熱交換器５全体を凝縮器として作用させる暖房運転を行う。この時室内へは室内熱交換器５全体で加熱された空気が送風される。従って、室内温度Ｔｉが暖房サイクル除湿運転に比較して短時間で上昇する。この結果、室内温度Ｔｉが上昇して２０℃を越えると、Ｔｉｓ−Ｔｉ＞ｄｔ４ではなくなるので、冷暖房用膨張弁４を開き、除湿用膨張弁６を絞る。これにより、冷媒は除湿用膨張弁６で絞られ、第２室内熱交換器５ｂを凝縮器、第１室内熱交換器５ａを蒸発器として作用させる暖房サイクル除湿運転を行う。この時室内へは第２室内熱交換器５ｂで加熱された空気と、第１室内熱交換器５ａで冷却減湿された空気が送風され、室内温度Ｔｉを上昇させながら除湿が行なわれる。
【００７１】
本実施例では、暖房サイクル除湿運転時に、ユーザーが設定した設定室内温度Ｔｉｓと室内温度Ｔｉの差があらかじめ定められた第４設定温度ｄｔ４よりも大きい場合に、温度の差が小さくなるまで通常の暖房運転を行うことで、暖房サイクル除湿運転時にユーザーが希望する設定室内温度に短時間で室内温度を到達させる運転を行なって、素早く快適な室内環境にすることができる。
【００７２】
上述した各実施例では、独立して動作するように説明したが、これらの各実施例が組み合わされて動作するようにすることにより、より一層適切な制御を行なうことができる。
【００７３】
なお、温度と湿度の優先は、設定値とのずれの大きい方を優先的に、或いは季節やユーザーの希望により優先度を変えるようにすることにより、素早く快適な室内環境を得るためのより適切な制御を行なうことができる。
【００７４】
【発明の効果】
本発明によれば、設定室内温度に短時間で室内温度を到達させる運転を行なって、素早く快適な室内環境にすることができる空気調和機を得ることができる。
【００７７】
また、本発明によれば、暖房サイクル除湿運転時に設定室内温度に短時間で室内温度を到達させる除湿運転を行なって、素早く快適な室内環境にすることができる空気調和機を得ることができる。
【００７８】
また、本発明によれば、暖房サイクル除湿運転時に設定室内湿度に短時間で室内湿度を到達させる除湿運転を行なって、素早く快適な室内環境にすることができる空気調和機を得ることができる。
【図面の簡単な説明】
【図１】本発明の第１実施例の空気調和機の構成図である。
【図２】本発明の第１実施例の空気調和機の各運転モードの動作説明図である。
【図３】本発明の第１実施例の空気調和機の自動運転モードの選択時の動作フローチャート図である。
【図４】本発明の第２実施例の空気調和機のサイクル除湿運転の動作フローチャート図である。
【図５】参考例１の空気調和機の暖房サイクル除湿運転モード選択時の動作フローチャート図である。
【図６】参考例２の空気調和機の暖房サイクル除湿運転時の動作フローチャート図である。
【図７】同空気調和機における圧縮機回転数の温度特性図である。
【図８】同空気調和機の変形例における圧縮機回転数の湿度特性図である。
【図９】本発明の第５実施例の空気調和機の暖房サイクル除湿運転時の動作フローチャート図である。
【図１０】本発明の第６実施例の空気調和機の暖房サイクル除湿運転時の動作フローチャート図である。
【符号の説明】
１…圧縮機、２…四方弁（運転切換弁）、３…室外熱交換器、４…冷暖房用膨張弁（冷暖房用絞り装置）、５…室内熱交換器、５ａ…第１室内熱交換器、５ｂ…第２室内熱交換器、６…除湿用膨張弁（除湿用絞り装置）、７…室外送風ファン、８…室内送風ファン、９…室外温度センサ（室外温度検出手段）、１０…室内温度センサ（室内温度検出手段）、１１…室内湿度センサ（室内湿度検出手段）、４９…リモコン、５０…制御装置。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner, and is particularly suitable for an air conditioner capable of performing a dehumidifying operation in which room air is heated by condensation heat of a refrigeration cycle.
[0002]
[Prior art]
As a conventional air conditioner, as disclosed in JP-A-54-47353, cooling, heating, cooling dehumidification operation and heating dehumidification operation are possible, and the temperature rise or temperature in the room during the dehumidification operation is enabled. For the purpose of preventing dehumidification and performing dehumidification while maintaining an arbitrary temperature, a compressor, an outdoor heat exchanger, a thermally divided indoor heat exchanger, between an outdoor heat exchanger and an indoor heat exchanger An expansion device for cooling and heating that is arranged in the cooling operation and the heating operation during the cooling operation, a dehumidification expansion device that is arranged between the two divided indoor heat exchangers and performs the expansion operation in the dehumidification operation, and a compressor; An operation switching valve that is arranged between the outdoor heat exchanger and the indoor heat exchanger and switches between a cooling cycle that leads the refrigerant discharged from the compressor to the outdoor heat exchanger and a heating cycle that leads to the indoor heat exchanger; Heat exchanger to evaporator, Cooling operation using an external heat exchanger as a condenser, heating operation using an indoor heat exchanger as a condenser and an outdoor heat exchanger as an evaporator, and one of the indoor heat exchangers as an evaporator and the other during a cooling cycle Cooling dehumidification operation using a condenser and outdoor heat exchanger as a condenser, and heating dehumidification operation using one of the indoor heat exchangers as a condenser, the other as an evaporator, and the outdoor heat exchanger as an evaporator during a heating cycle There is something that can be switched to.
[0003]
And as a control method of this air conditioner, it is possible to arbitrarily select four operations of cooling operation, heating operation, cooling dehumidification operation and heating dehumidification operation, or the room temperature is set to a thermostat or the like. It is shown that when it is higher than the value, it automatically switches to cooling dehumidification operation, and when it is lower, it automatically switches to heating dehumidification operation.
[0004]
[Problems to be solved by the invention]
However, in such a conventional air conditioner, there is no disclosure regarding automatic switching between cooling operation and cooling dehumidification operation, or automatic switching between heating operation and heating dehumidification operation, and a comfortable operation is automatically obtained. There was a problem that it was not possible. Further, there is a problem that control based on the outdoor temperature is not disclosed, and an appropriate dehumidifying operation cannot be automatically obtained when the outdoor temperature is low and the indoor heating load is large. In addition, the specific control method when heating dehumidification operation is selected is not disclosed. Was not. In addition, there is no disclosure about controlling the rotational speed of the compressor during heating dehumidification operation, and consideration is given to reaching the set room temperature desired by the user during heating dehumidification operation in a short time. It wasn't. Also, there is no disclosure about controlling the throttle amount of the dehumidifying squeezing device during heating dehumidifying operation, and for reaching the indoor humidity in a short time to the set indoor humidity desired by the user during heating dehumidifying operation. It was not considered.
[0005]
An object of the present invention is to obtain an air conditioner that performs a driving operation for reaching a set room temperature in a short period of time to quickly and comfortably create a comfortable indoor environment.
[0008]
Another object of the present invention is to obtain an air conditioner that can perform a dehumidifying operation that allows a room temperature to reach a set room temperature in a short time during a heating cycle dehumidifying operation so that a comfortable indoor environment can be obtained quickly.
[0009]
Another object of the present invention is to obtain an air conditioner that can perform a dehumidifying operation to reach a set indoor humidity in a short time during a heating cycle dehumidifying operation in a short period of time, thereby quickly and comfortably creating a comfortable indoor environment.
[0010]
[Means for Solving the Problems]
To achieve the above object, an air conditioner that is one of the representative inventions of the present invention is a compressor, an outdoor heat exchanger, a thermally divided indoor heat exchanger, the outdoor heat exchanger, and the An air conditioner expansion device that is arranged between indoor heat exchangers and performs an expansion operation during cooling and heating operations, and a dehumidification device that is disposed between the two divided indoor heat exchangers and performs an expansion operation during dehumidification operations. An expansion device, a cooling cycle that is arranged between the compressor and the outdoor heat exchanger and the indoor heat exchanger and guides the refrigerant from the compressor to the outdoor heat exchanger and the indoor heat exchanger An operation switching valve for switching to a heating cycle, and a control device for controlling the dehumidifying throttling device and the operation switching valve, wherein the control device is an evaporator for the indoor heat exchanger and a condenser for the outdoor heat exchanger. Cooling operation and the indoor heat exchanger Heating operation using a condenser, the outdoor heat exchanger as an evaporator, and a cooling cycle dehumidification using one of the indoor heat exchangers in the cooling cycle as an evaporator, the other as a condenser, and the outdoor heat exchanger as a condenser While having a function to switch between operation and heating cycle dehumidification operation in which one of the indoor heat exchangers in the heating cycle is a condenser, the other is an evaporator, and the outdoor heat exchanger is an evaporator, In the automatic operation mode, the cooling cycle and the heating cycle are automatically switched based on the level of the set room temperature and the room temperature, and in the switched cooling cycle, Based on the difference between the set room temperature and the room temperature, the cooling operation is performed. When The cooling cycle dehumidifying operation And automatically switching the heating operation with the switched heating cycle. The heating cycle dehumidifying operation When Has a function to switch automatically.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the embodiments after the second embodiment, illustrations of parts common to the first embodiment and overlapping descriptions are omitted, and the same or equivalent parts as the respective embodiments are denoted by the reference numerals used in the first embodiment. Will be explained with reference to.
[0012]
An air conditioner according to a first embodiment of the present invention will be described with reference to FIGS.
[0013]
First, the structure of the air conditioner of a present Example is demonstrated, referring FIG. FIG. 1 is a configuration diagram of an air conditioner according to a first embodiment of the present invention.
[0014]
In FIG. 1, the refrigeration cycle is arranged between a compressor 1, an outdoor heat exchanger 3, a thermally divided indoor heat exchanger 5, and between the outdoor heat exchanger 3 and the indoor heat exchanger 5. It is arranged between the first and second indoor heat exchangers 5a and 5b, and the expansion / contraction expansion valve 4 having a variable throttle amount, which constitutes a cooling / heating expansion device that performs a throttling operation during operation and heating operation. A dehumidifying expansion valve 6 that constitutes a dehumidifying throttling device that performs a throttling operation during dehumidifying operation, and is arranged between the expansion valve 6 for dehumidification, the compressor 1, the outdoor heat exchanger 3, and the indoor heat exchanger 5 for compression. A four-way valve 2 constituting an operation switching valve for switching between a cooling cycle for leading the refrigerant from the machine 1 to the outdoor heat exchanger 3 and a heating cycle for leading to the indoor heat exchanger 5 is connected by a refrigerant pipe. Has been.
[0015]
The compressor 1 is a variable capacity compressor and is inverter-controlled by the control device 50. And the outdoor ventilation fan 7 is installed so that the outdoor air may be forcedly ventilated to the outdoor heat exchanger 3. The indoor fan 8 is installed so as to forcibly vent indoor air to the indoor heat exchanger 5. By the operation of the indoor blower fan 8, the indoor air is sucked in parallel into the first indoor heat exchanger 5a and the second indoor heat exchanger 5b, and the air emitted from this is mixed and blown into the room from the indoor blower fan 8. It has become so.
[0016]
The remote controller 49 is a setting button for setting a desired operation mode arbitrarily and a setting button for setting the operation mode to automatic switching, a setting button for setting a desired room temperature, a setting button for setting a desired room humidity, and various other operation states. A setting button or the like for setting is provided.
[0017]
Based on signals from various sensors such as the remote controller 49, the outdoor temperature sensor 9, the indoor temperature sensor 10, and the indoor humidity sensor 11, the control device 50 includes the compressor 1, the four-way valve 2, the air conditioning expansion valve 4, and the dehumidifying device. The expansion valve 6 and the outdoor blower fan 7 are controlled. The outdoor temperature sensor 9 is installed to detect the intake air temperature of the outdoor heat exchanger 3, the indoor temperature sensor 10 is installed to detect the intake air temperature of the indoor heat exchanger 5, and the indoor humidity sensor 11 is indoors. It is installed so as to detect the intake air humidity of the heat exchanger 5.
[0018]
The control device 50 switches the four-way valve 2 according to the signal of the operation mode selected by the remote controller 49, for example, and controls the throttling of the cooling / heating expansion valve 4 and the dehumidifying expansion valve 6 as shown in FIG.
[0019]
The operation when the four operation modes are arbitrarily selected by the remote controller 49 will be described with reference to FIG. FIG. 2 is an operation explanatory diagram of each operation mode of the air conditioner according to the first embodiment of the present invention.
[0020]
As shown in FIG. 2, when the operation mode selected by the remote controller 49 is the cooling operation, the four-way valve 2 is configured so as to constitute a cooling cycle in which the refrigerant exiting the compressor 1 flows to the outdoor heat exchanger 3. Switching, the air conditioning expansion valve 4 is throttled, and the dehumidifying expansion valve 6 is fully opened. Further, when the operation mode selected by the remote controller 49 is the heating operation, the four-way valve 2 is switched so as to constitute a heating cycle in which the refrigerant discharged from the compressor 1 flows to the indoor heat exchanger 5, and the expansion for cooling and heating is performed. The valve 4 is throttled and the dehumidifying expansion valve 6 is fully opened. Further, when the operation mode selected by the remote controller 49 is the cooling cycle dehumidifying operation, the four-way valve 2 is switched so as to constitute a cooling cycle in which the refrigerant discharged from the compressor 1 flows to the outdoor heat exchanger 3, The expansion valve 4 is fully opened and the dehumidifying expansion valve 6 is throttled. Further, when the operation mode selected by the remote controller 49 is the heating cycle dehumidifying operation, the four-way valve 2 is switched so as to constitute a heating cycle in which the refrigerant that has exited the compressor 1 flows to the indoor heat exchanger 5b. The expansion valve 4 is fully opened and the dehumidifying expansion valve 6 is throttled.
[0021]
This control operation will be described more specifically. When the user selects the cooling operation mode, the control device 50 receives a signal of the cooling operation mode from the remote controller 49, transmits a signal for fully opening the dehumidifying expansion valve 6 and narrowing the cooling and heating expansion valve 4, and The heat exchanger 3 serves as a condenser and the indoor heat exchanger 5 serves as an evaporator. Thereby, the air cooled by the indoor heat exchanger 5 is blown into the room, and the cooling operation is performed.
[0022]
Further, when the user selects the heating operation mode, the control device 50 receives the heating operation mode signal from the remote controller 49, performs the control to fully open the dehumidifying expansion valve 6 and throttle the cooling / heating expansion valve 4, The outdoor heat exchanger 3 is operated as an evaporator and the indoor heat exchanger 5 is operated as a condenser. Thereby, the air heated with the indoor heat exchanger 5 is ventilated indoors, and heating operation is performed.
[0023]
Further, when the user selects the cooling cycle dehumidifying operation mode, the control device 50 receives a signal of the cooling cycle dehumidifying operation mode from the remote controller 49 so that the refrigerant that has left the compressor 1 flows to the outdoor heat exchanger 3. The four-way valve 2 is switched, the air conditioning expansion valve 4 is fully opened, and the dehumidifying expansion valve 6 is throttled. As a result, the high-temperature and high-pressure refrigerant gas compressed by the compressor 1 passes through the outdoor heat exchanger 3 and the fully-opening and cooling expansion valve 4 from the four-way valve 2, and in the first indoor heat exchanger 5 a, the indoor blower fan 8. Radiates and condenses to the air blown by the air, is throttled by the dehumidifying expansion valve 6, expands to a temperature equal to or lower than the dew point temperature of the room air, and is blown by the room blower fan 8 by the second indoor heat exchanger 5b. The refrigerant absorbs heat and evaporates, passes through the four-way valve 2, and returns to the compressor 1 again. At this time, the air heated by the first indoor heat exchanger 5a and the air cooled and dehumidified by the second indoor heat exchanger 5b are mixed and blown into the room, and the cooling cycle dehumidifying operation is performed.
[0024]
When the user selects the heating cycle dehumidifying operation mode, the control device 50 receives a signal of the heating cycle dehumidifying operation mode from the remote controller 49 so that the refrigerant that has left the compressor 1 flows into the indoor heat exchanger 5. The four-way valve 2 is switched, the dehumidifying expansion valve 6 is throttled, and the air conditioning expansion valve 4 is fully opened. As a result, the high-temperature and high-pressure refrigerant gas compressed by the compressor 1 passes through the four-way valve 2, dissipates heat to the air blown by the indoor blower fan 8 in the second indoor heat exchanger 5 b, condenses, and expands for dehumidification. It is throttled by the valve 6, absorbs heat from the air blown by the indoor blower fan 8 in the first indoor heat exchanger 5 a, evaporates, passes through the fully open air conditioning expansion valve 4 and the outdoor heat exchanger 3, and passes through the four-way valve 2. Return to the compressor 1 again. At this time, the air heated by the second indoor heat exchanger 5b and the air cooled and dehumidified by the first indoor heat exchanger 5a are mixed and blown into the room, and the heating cycle dehumidifying operation is performed.
[0025]
As described above, according to the operation mode set by the user, the cooling, heating, cooling cycle dehumidification, and heating cycle dehumidification operation modes can be arbitrarily selected, so that the indoor environment is in a state suitable for the user's preference. Can do.
[0026]
Next, the operation when the above-described four operation modes are automatically switched by the remote controller 49 will be described with reference to FIG. FIG. 3 is an operation flowchart when the automatic operation mode of the air conditioner according to the first embodiment of the present invention is selected.
[0027]
When performing automatic driving, the user selects the automatic driving mode button of the remote controller 49 and starts automatic driving as shown in FIG. 3 (step 81). As a result, the compressor 1 is driven and the refrigerant circulates in the refrigeration cycle, the outdoor blower fan 7 is driven and the outdoor air is ventilated to the outdoor heat exchanger 3, and the indoor blower fan 8 is driven and the indoor air is driven. Is ventilated through the indoor heat exchanger 5 and the air conditioner is operated.
[0028]
Then, the desired room temperature Tis is set by pressing the room temperature setting button on the remote controller 49 (step 82). If the control device 50 has a preset standard set value of the set room temperature Tis, and the set room temperature Tis is not set by the room temperature setting button, this standard set value is used. The same applies to the second and subsequent embodiments.
[0029]
The room temperature sensor 10 detects the room temperature (step 85), and compares the set room temperature Tis with the room temperature Ti (step 86). In this comparison, if the set room temperature Tis <the room temperature Ti, the process proceeds to step 90, and if not, the process proceeds to step 95.
[0030]
In step 90, it is determined whether or not the difference Tis−Ti between the set room temperature Tis and the room temperature Ti is greater than a predetermined temperature difference (first set temperature difference Δt1). In this determination, if the difference is larger than the first set temperature difference Δt1, the cooling operation is performed (step 91), and the process returns to step 82. If the determination in step 90 is smaller, the cooling cycle dehumidifying operation is performed, and the process returns to step 82. The first set temperature difference Δt1 is set in advance to a specific temperature difference in the cooling cycle suitable for switching between the cooling operation and the cooling cycle dehumidifying operation, and is different from a second set temperature difference Δt2 described later.
[0031]
In step 95, it is determined whether or not the difference Tis−Ti between the set room temperature Tis and the room temperature Ti is smaller than a predetermined temperature difference (second set temperature difference Δt2). If the difference is smaller than the second set temperature difference Δt2 in this determination, the heating cycle dehumidifying operation is performed (step 96), and the process returns to step 82. In step 95, large In that case, the heating operation is performed, and the process returns to step 82. The second set temperature difference Δt2 is set to a specific temperature difference in the heating cycle suitable for switching between the heating operation and the heating cycle dehumidifying operation, and is different from the first set temperature difference Δt1 described above.
[0032]
As described above, according to the present embodiment, the cooling operation, the heating operation, the cooling cycle dehumidifying operation, and the heating cycle dehumidifying operation are automatically switched based on the difference Tis-Ti between the set indoor temperature Tis and the indoor temperature Ti. Therefore, the indoor temperature can be reached in a short time to the set indoor temperature desired by the user, and a comfortable indoor environment can be achieved. According to the present embodiment, in particular, the set room temperature Tis and the room temperature Ti are compared to automatically switch between the cooling cycle and the heating cycle, and in the cooling cycle, switching between the cooling operation and the cooling cycle dehumidifying operation. Is automatically switched by the first set temperature difference Δt1 suitable for the heating cycle, and is automatically switched by the second set temperature difference Δt2 suitable for switching between the heating operation and the heating cycle dehumidifying operation in the heating cycle. The room temperature Ti can be reached to the set room temperature Tis desired by the user in a shorter time, and a comfortable room environment can be obtained. In addition to the difference Tis-Ti between the set indoor temperature Tis and the indoor temperature Ti, for example, the above-described effect can be obtained and controlled by adding conditions such as the outdoor temperature. Appropriate control can be performed.
[0033]
next, Reference example 1 Will be described with reference to FIG. Figure 4 Reference example 1 It is an operation | movement flowchart figure of the cycle dehumidification driving | operation of this air conditioner. Reference example 1 Is different from the first embodiment as described below. Reference example 1 The illustration corresponding to FIG. 1 and the description thereof are omitted.
[0034]
Reference example 1 In the cycle dehumidifying operation, the control device 50 controls the four-way valve 2 and the cooling / heating expansion valve 4 as described below based on the outdoor temperature To and the set outdoor temperature Tos detected by the outdoor temperature sensor 9.
[0035]
The cycle dehumidifying operation is started when a cycle dehumidifying operation mode button is provided on the remote controller 49 and this is selected, or when the condition for performing the cycle dehumidifying operation in the automatic operation mode is reached (step 100). In this automatic operation mode, the three operation modes of the cooling operation, the heating operation, and the cycle dehumidifying operation are automatically switched, and the condition for switching to the cooling cycle dehumidifying operation and the heating cycle dehumidifying operation of the first embodiment described above. Is switched to cycle dehumidifying operation.
[0036]
When this cycle dehumidifying operation is started, the dehumidifying expansion valve 6 is throttled by the control device 50 (step 101). Then, the outdoor temperature sensor 9 detects the outdoor temperature To and sends the detected value to the control device 50 (step 102). Then, it is determined whether or not the outdoor temperature To is lower than a predetermined temperature Tos (step 103). In this determination, if the outdoor temperature To <the set outdoor temperature Tos, the process proceeds to step 104; otherwise, the process proceeds to step 107. The set outdoor temperature Tos is set to 15 ° C., for example. If the set outdoor temperature Tos can be changed by the remote controller 49 or the like, the set outdoor temperature Tos that matches the area where the air conditioner is installed can be set, and more appropriate control can be performed. .
[0037]
In step 104, the four-way valve 2 is switched so that the refrigerant leaving the compressor 1 flows in the direction of the indoor heat exchanger 5. Next, control for opening the air conditioning expansion valve 4 is performed (step 105), and the process returns to step 103. By these steps 104 and 105, the heating cycle dehumidifying operation in the cycle dehumidifying operation is performed.
[0038]
On the other hand, in step 107, the four-way valve 2 is switched so that the refrigerant exiting the compressor 1 flows in the direction of the outdoor heat exchanger 3. Next, control for opening the air conditioning expansion valve 4 is performed (step 108), and the process returns to step 103. By these steps 107 and 108, the cooling cycle dehumidification operation in the cycle dehumidification operation is performed.
[0039]
Reference example 1 Then, since the control is performed so that the heating cycle dehumidifying operation and the cooling cycle dehumidifying operation are automatically switched based on the outdoor temperature To, the outdoor temperature To is low and the indoor heating load is large (for example, the outdoor temperature is 0 ° C.). When the temperature is low), a heating cycle dehumidifying operation in which condensation is performed only by the indoor heat exchanger 5b can be performed, and a sufficient amount of heating can be ensured and a dehumidifying operation that does not lower the indoor temperature can be performed. Further, in the summer season when the outdoor temperature To is high and the indoor cooling load is large (for example, when the outdoor temperature is high and the temperature is high such as 35 ° C.), the cooling cycle dehumidifying operation is performed in which the evaporation is performed only by the indoor heat exchanger 5b. It is possible to perform a dehumidifying operation in which sufficient cooling and dehumidification are ensured and the room temperature is not increased. In this way, a comfortable indoor environment can be achieved efficiently.
[0040]
next, Reference example 2 Will be described with reference to FIG. FIG. Reference example 2 It is an operation | movement flowchart figure at the time of the heating cycle dehumidification operation mode selection of this air conditioner. Reference example 2 As described below, this is different from the first embodiment, and the other points are the same as those of the first embodiment, and the illustration and description corresponding to FIG. 1 are omitted.
[0041]
Reference example 2 Then, when the heating cycle dehumidifying operation mode is selected, the control device 50 sets the room temperature Ti detected by the room temperature sensor 10, the user set or the preset set room temperature Tis and the preset set temperature difference dt3. Based on this, the four-way valve 2, the cooling / heating expansion valve 4, and the dehumidifying expansion valve 6 are controlled as described below.
[0042]
In order to select the heating cycle dehumidifying operation mode, the user selects the heating cycle dehumidifying operation mode button of the remote controller 49 (step 201). As a result, the compressor 1 is driven, the four-way valve 2 is moved to the heating cycle side, the refrigerant circulates in the refrigeration cycle, the outdoor blower fan 7 is driven, and the outdoor air is ventilated to the outdoor heat exchanger 3. At the same time, the indoor blower fan 8 is driven and the indoor air is passed through the indoor heat exchanger 5 to perform the heating cycle dehumidifying operation.
[0043]
Then, the user presses the room temperature setting button on the remote controller 49 to set the desired room temperature Tis (step 202). The room temperature Ti is detected by the room temperature sensor 10, and the detected value is sent to the control device 50 (step 203). Next, it is determined whether or not the room temperature Ti is higher than the set room temperature Tis (step 204). If it is determined that the room temperature Ti is not greater than the set room temperature Tis, the heating cycle dehumidifying operation is continued (step 25), and the process returns to step 202. In this way, the heating cycle dehumidifying operation is continued until the room temperature Ti> the set room temperature Tis. If it is determined in step 204 that the room temperature Ti> the set room temperature Tis, the process proceeds to step 206.
[0044]
In step 206, it is determined whether or not the difference Ti-Tis between the room temperature Ti and the set room temperature Tis is greater than a predetermined temperature difference (third set temperature difference dt3). In this determination, if the difference Ti-Tis between the room temperature Ti and the set room temperature Tis is not larger than the third set temperature difference dt3, the process proceeds to the cooling cycle dehumidifying operation side of step 207, and if larger, the heating of step 210 is performed. Proceed to cycle dehumidification operation. The third set temperature difference dt3 is set to 5 ° C., for example.
[0045]
On the heating cycle dehumidifying operation side, the four-way valve 2 is switched so that the refrigerant discharged from the compressor 1 flows in the direction of the indoor heat exchanger 5 (step 207), and control for opening the cooling and heating expansion valve 4 is performed (step). 208), control to throttle the dehumidifying expansion valve 6 is performed (step 209), and the process returns to step 206. By these steps 207 to 209, the heating cycle dehumidifying operation is performed, and dehumidification is performed while raising the room temperature.
[0046]
When the difference Ti-Tis between the room temperature Ti and the set room temperature Tis becomes larger than the third set temperature difference dt3 by the heating cycle dehumidifying operation, the operation is switched to the cooling cycle dehumidifying operation side as described above. On the cooling cycle dehumidifying operation side, the four-way valve 2 is switched so that the refrigerant discharged from the compressor 1 flows in the direction of the outdoor heat exchanger 3 (step 210), and control for opening the air conditioning expansion valve 4 is performed ( Step 211), control to throttle the dehumidifying expansion valve 6 is performed (step 212), and the process returns to step 206. By these steps 210 to 212, a cooling cycle dehumidifying operation is performed, and dehumidification is performed while the room temperature Ti is lowered.
[0047]
When the difference Ti-Tis between the room temperature Ti and the set room temperature Tis is not greater than the third set temperature difference dt3 by the cooling cycle dehumidifying operation, the process is switched to the heating cycle dehumidifying operation side in step 207 as described above. After that, switching between the heating cycle dehumidifying operation and the cooling cycle dehumidifying operation is repeated.
[0048]
Reference example 2 According to the above, when the user selects the heating cycle dehumidifying operation mode button of the remote controller 49, the heating cycle dehumidification is performed until the difference Ti-Tis between the room temperature Ti and the set room temperature Tis becomes larger than the third set temperature difference dt3. When the heating cycle dehumidifying operation mode is selected, the heating cycle dehumidifying operation with excellent heating efficiency and the cooling cycle dehumidifying operation with excellent cooling efficiency are automatically switched appropriately. Can be controlled in a comfortable indoor environment.
[0049]
Next, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a flowchart of the operation of the air conditioner according to the fourth embodiment of the present invention during the heating cycle dehumidifying operation, FIG. 7 is a temperature characteristic diagram of the compressor rotation speed in the air conditioner, and FIG. It is a humidity characteristic figure of compressor rotation speed in a modification. The present embodiment is different from the first embodiment as described below, and the other points are the same as those of the first embodiment, and the illustration and description corresponding to FIG. 1 are omitted.
[0050]
In the present embodiment, the control device 50 performs the variable capacity compressor 1 as described below based on the indoor temperature Ti detected by the indoor temperature sensor 10 and the set indoor temperature Tis set by the user during the heating cycle dehumidifying operation. Control the capacity.
[0051]
In order to perform the heating cycle dehumidifying operation, the user selects the heating cycle dehumidifying operation mode button of the remote controller 49 (step 300). As a result, the compressor 1 is driven, the four-way valve 2 is moved to the heating cycle side, the refrigerant circulates in the refrigeration cycle, the outdoor blower fan 7 is driven, and the outdoor air is ventilated to the outdoor heat exchanger 3. At the same time, the indoor blower fan 8 is driven and the indoor air is passed through the indoor heat exchanger 5 to perform the heating cycle dehumidifying operation.
[0052]
Then, the user presses the room temperature setting button on the remote controller 49 to set the desired room temperature Tis (step 301). The room temperature Ti is detected by the room temperature sensor 10, and the detected value is sent to the control device 50 (step 302). Next, it is determined whether the room temperature Ti is lower than the set room temperature Tis (whether Ti <Tis) (step 303). If it is determined that the room temperature Ti is lower than the set room temperature Tis, the rotational speed of the compressor 1 is increased (step 304), and the process returns to step 301. The operation of increasing the rotational speed of the compressor 1 is continued until the room temperature Ti becomes equal to or higher than the set room temperature Tis.
[0053]
This operation will be described more specifically. For example, when the heating cycle dehumidifying operation is started when the user's set room temperature Tis is 25 ° C. and the room temperature Ti is 18 ° C., the room temperature Ti <the set room temperature Tis. The control device 50 increases the rotational speed of the compressor 1 based on FIG. That is, the compressor rotational speed is increased in proportion to the difference Tis-Ti between the set room temperature Tis and the room temperature Ti. As the rotational speed of the compressor 1 is increased, the amount of refrigerant circulation increases, and the amount of heat absorbed by the outdoor heat exchanger 3 and the first indoor heat exchanger 5a, which are evaporators, increases. The heat radiation amount in the two indoor heat exchanger 5b increases. Accordingly, the amount of heat released into the room is increased by the amount of heat absorbed by the outdoor heat exchanger 3.
[0054]
If the room temperature Ti is equal to or higher than the set room temperature Tis as determined in step 303 described above, the rotational speed of the compressor 1 is decelerated (step 305), and the process returns to step 301. The operation of decelerating the rotational speed of the capacity variable compressor 1 is continued until the room temperature Ti becomes lower than the set room temperature Tis.
[0055]
This operation will be described in more detail. For example, when the heating cycle dehumidifying operation is started when the user's set room temperature Tis is 10 ° C. and the room temperature Ti is 18 ° C., the control is not performed because the room temperature Ti <the set room temperature Tis. The apparatus 50 decelerates the rotation speed of the compressor 1 based on FIG. That is, the rotational speed of the compressor is reduced in proportion to the difference Tis-Ti between the set room temperature Tis and the room temperature Ti. By reducing the rotation speed of the compressor 1, the refrigerant circulation amount is reduced, and the heat absorption amount in the outdoor heat exchanger 3 and the first indoor heat exchanger 5a as the evaporator is reduced. The amount of heat released in the indoor heat exchanger 5b is reduced. Accordingly, the amount of heat released into the room is reduced by the amount of heat absorbed by the outdoor heat exchanger 3.
[0056]
In the present embodiment, during the heating cycle dehumidifying operation, the set room temperature Tis set by the user and the room temperature Ti are compared to control the rotation speed of the compressor 1, so that the set room temperature Tis desired by the user can be reduced to a short time. Thus, the indoor temperature Ti can be reached to make a comfortable indoor environment.
[0057]
In this embodiment, the compressor temperature is controlled by detecting the room temperature Ti. However, if the compressor speed is changed, the temperature of the first indoor heat exchanger 5a that is an evaporator also changes. Using this characteristic, the compressor speed may be controlled by detecting the indoor humidity RHi instead of the indoor temperature Ti. In this case, when the indoor humidity detected by the indoor humidity sensor 11 is RHi and the set indoor humidity set by the user is RHis, as shown in FIG. 8, the difference between the set indoor humidity RHis and the indoor humidity RHi RHis− The compressor speed may be controlled in proportion to RHi. Since the specific operation is the same as that in FIG. 6 in which the set room temperature Tis is changed to the set room humidity RHis and the room temperature Ti is changed to the room humidity RHi, the flowchart and description thereof are omitted.
[0058]
Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 9 is an operation flowchart of the air conditioner according to the fifth embodiment of the present invention during the heating cycle dehumidifying operation. The present embodiment is different from the first embodiment as described below, and the other points are the same as those of the first embodiment, and the illustration and description corresponding to FIG. 1 are omitted.
[0059]
In the present embodiment, the controller 50 controls the dehumidifying expansion valve 6 as described below based on the indoor humidity RHi detected by the indoor humidity sensor 11 and the set indoor humidity RHis set by the user during the heating cycle dehumidifying operation. Control the amount of aperture.
[0060]
In order to perform the heating cycle dehumidifying operation, the user selects the heating cycle dehumidifying operation mode button of the remote controller 49 (step 400). As a result, the compressor 1 is driven, the four-way valve 2 is moved to the heating cycle side, the refrigerant circulates in the refrigeration cycle, the outdoor blower fan 7 is driven, and the outdoor air is ventilated to the outdoor heat exchanger 3. At the same time, the indoor blower fan 8 is driven and the indoor air is passed through the indoor heat exchanger 5 to perform the heating cycle dehumidifying operation.
[0061]
And, the user Wet The desired indoor humidity RHis is set by pressing the degree setting button (step 401). The indoor humidity sensor 11 detects the indoor humidity RHi and sends the detected value to the control device 50 (step 402). Next, it is determined whether or not the indoor humidity RHi is equal to the set indoor humidity RHis (whether RHi = RHis) (step 403). If it is determined that the room humidity RHi is equal to the set room humidity RHis, the process returns to step 401.
[0062]
If it is determined in step 403 that the indoor humidity RHi is equal to or higher than the set indoor humidity RHis, the throttle amount of the dehumidifying expansion valve 6 is controlled (step 404), and the process returns to step 401. The control of the throttle amount of the dehumidifying expansion valve 6 is continued until the indoor humidity RHi becomes equal to the set indoor humidity RHis.
[0063]
This operation will be described more specifically. For example, when the heating cycle dehumidifying operation is started when the indoor humidity RHis set by the user is 40% and the indoor humidity RHi is 70%, RHi> RHis. The throttle valve 6 is throttled. As a result, the temperature of the first indoor heat exchanger 5a, which is an evaporator, decreases, and thus the amount of dehumidification in the first indoor heat exchanger 5a increases, and the indoor humidity RHi reaches the set indoor humidity RHis in a short time.
[0064]
In the present embodiment, during the heating cycle dehumidifying operation, the indoor set humidity RHis set by the user and the indoor humidity RHi are compared to control the throttle amount of the dehumidifying expansion valve 6, so that the set indoor humidity RHis desired by the user is obtained. The indoor humidity RHi can be reached in a short time, and a comfortable indoor environment can be achieved.
[0065]
Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 10 is an operation flowchart of the air conditioner according to the sixth embodiment of the present invention during the heating cycle dehumidifying operation. The present embodiment is different from the first embodiment as described below, and the other points are the same as those of the first embodiment, and the illustration and description corresponding to FIG. 1 are omitted.
[0066]
In the present embodiment, the control device 50 performs the following based on the indoor temperature Ti detected by the indoor temperature sensor 10, the set indoor temperature Tis set by the user, and the preset set temperature difference dt4 during the heating cycle dehumidifying operation. The air conditioning expansion valve 4 and the dehumidifying expansion valve 6 are controlled as described below.
[0067]
In order to perform the heating cycle dehumidifying operation, the user selects the heating cycle dehumidifying operation mode button of the remote controller 49 (step 500). As a result, the compressor 1 is driven, the four-way valve 2 is moved to the heating cycle side, the refrigerant circulates in the refrigeration cycle, the outdoor blower fan 7 is driven, and the outdoor air is ventilated to the outdoor heat exchanger 3. At the same time, the indoor blower fan 8 is driven and the indoor air is passed through the indoor heat exchanger 5 to perform the heating cycle dehumidifying operation.
[0068]
Then, the user presses the room temperature setting button on the remote controller 49 to set the desired room temperature Tis (step 501). The room temperature Ti is detected by the room temperature sensor 10, and the detected value is sent to the control device 50 (step 502). Next, it is determined whether or not the difference Tis−Ti between the set room temperature Tis and the room temperature Ti is greater than a predetermined temperature difference (fourth set temperature difference dt4). In this determination, if the difference Tis-Ti between the set room temperature Tis and the room temperature Ti is greater than the fourth set temperature difference dt4, the process proceeds to the heating operation side of step 504, and if not, the heating cycle dehumidification of step 506 is performed. Proceed to the driving side. In the present embodiment, the fourth set temperature difference dt4 is set to 10 ° C.
[0069]
On the heating operation side, control to throttle the air conditioning expansion valve 4 is performed (step 504), control to open the dehumidifying expansion valve 6 is performed (step 505), and the process returns to step 501. By these steps 504 and 505, the heating operation is performed. On the heating cycle dehumidifying operation side, control for opening the cooling / heating expansion valve 4 is performed (step 506), control for narrowing the dehumidifying expansion valve 6 is performed (step 507), and the process returns to step 501. By these steps 506 and 507, the heating cycle dehumidifying operation is performed, and dehumidification is performed while raising the room temperature Ti.
[0070]
This operation will be described more specifically. For example, when the heating cycle dehumidifying operation is started when the user's set room temperature Tis is 30 ° C. and the room temperature Ti is 12 ° C., the control device 50 Throttles the expansion valve 4 for heating and cooling and opens the expansion valve 6 for dehumidification. Thereby, the refrigerant performs a heating operation in which the entire indoor heat exchanger 5 acts as a condenser without being throttled by the dehumidifying expansion valve 6. At this time, air heated by the entire indoor heat exchanger 5 is blown into the room. Therefore, the room temperature Ti rises in a short time compared to the heating cycle dehumidifying operation. As a result, when the indoor temperature Ti rises and exceeds 20 ° C., Tis−Ti> dt4 is not satisfied, so the air conditioning expansion valve 4 is opened and the dehumidifying expansion valve 6 is throttled. Thus, the refrigerant is throttled by the dehumidifying expansion valve 6, and a heating cycle dehumidifying operation is performed in which the second indoor heat exchanger 5b functions as a condenser and the first indoor heat exchanger 5a functions as an evaporator. At this time, the air heated by the second indoor heat exchanger 5b and the air cooled and dehumidified by the first indoor heat exchanger 5a are blown into the room, and dehumidification is performed while raising the room temperature Ti.
[0071]
In this embodiment, during the heating cycle dehumidifying operation, when the difference between the set room temperature Tis set by the user and the room temperature Ti is larger than a predetermined fourth set temperature dt4, the normal temperature difference is reduced until the temperature difference becomes small. By performing the heating operation, it is possible to perform the operation of reaching the indoor temperature in a short time to the set indoor temperature desired by the user during the heating cycle dehumidifying operation, so that a comfortable indoor environment can be quickly obtained.
[0072]
In each of the above-described embodiments, it has been described that they operate independently, but more appropriate control can be performed by operating these embodiments in combination.
[0073]
Note that the priority of temperature and humidity is more appropriate to obtain a quick and comfortable indoor environment by giving priority to the one with the larger deviation from the set value or by changing the priority according to the season or the user's request. Control can be performed.
[0074]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the air conditioner which can perform the driving | running which makes room temperature reach preset room temperature in a short time, and can be made into a comfortable indoor environment quickly can be obtained.
[0077]
Further, according to the present invention, it is possible to obtain an air conditioner that can perform a dehumidifying operation that allows the room temperature to reach the set room temperature in a short time during the heating cycle dehumidifying operation, thereby quickly and comfortably creating a comfortable indoor environment.
[0078]
Further, according to the present invention, it is possible to obtain an air conditioner that can perform a dehumidifying operation that allows the indoor humidity to reach the set indoor humidity in a short time during the heating cycle dehumidifying operation to quickly and comfortably enter the indoor environment.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an air conditioner according to a first embodiment of the present invention.
FIG. 2 is an operation explanatory diagram of each operation mode of the air conditioner according to the first embodiment of the present invention.
FIG. 3 is an operation flowchart when the automatic operation mode of the air conditioner according to the first embodiment of the present invention is selected.
FIG. 4 is an operation flowchart of the cycle dehumidifying operation of the air conditioner according to the second embodiment of the present invention.
[Figure 5] Reference example 1 It is an operation | movement flowchart figure at the time of the heating cycle dehumidification operation mode selection of this air conditioner.
[Fig. 6] Reference example 2 It is an operation | movement flowchart figure at the time of the heating cycle dehumidification operation | movement of this air conditioner.
FIG. 7 is a temperature characteristic diagram of compressor rotation speed in the air conditioner.
FIG. 8 is a humidity characteristic diagram of compressor rotation speed in a modification of the air conditioner.
FIG. 9 is an operation flowchart of the air-conditioning apparatus according to the fifth embodiment of the present invention during a heating cycle dehumidifying operation.
FIG. 10 is an operation flowchart of the air conditioner according to the sixth embodiment of the present invention during a heating cycle dehumidifying operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Four way valve (operation switching valve), 3 ... Outdoor heat exchanger, 4 ... Expansion valve for cooling / heating (throttle device for cooling / heating), 5 ... Indoor heat exchanger, 5a ... 1st indoor heat exchanger 5 ... 2nd indoor heat exchanger, 6 ... Dehumidification expansion valve (throttle device for dehumidification), 7 ... Outdoor fan, 8 ... Indoor fan, 9 ... Outdoor temperature sensor (outdoor temperature detection means), 10 ... Indoor Temperature sensor (indoor temperature detection means), 11 ... Indoor humidity sensor (indoor humidity detection means), 49 ... Remote control, 50 ... Control device.

Claims

A compressor, an outdoor heat exchanger, a thermally divided indoor heat exchanger, and an air conditioner that is arranged between the outdoor heat exchanger and the indoor heat exchanger and performs a throttling action during cooling operation and heating operation A throttling device, a throttling device for dehumidification that is disposed between the two divided indoor heat exchangers and performs a throttling operation during a dehumidifying operation, and is disposed between the compressor, the outdoor heat exchanger, and the indoor heat exchanger Operation switching valve for switching between a cooling cycle for leading the refrigerant discharged from the compressor to the outdoor heat exchanger and a heating cycle for leading to the indoor heat exchanger, means for detecting the room temperature, means for setting the set room temperature And a control device for controlling the air conditioning / heating device, the dehumidifying device and the operation switching valve,
The controller is
In the cooling operation using the indoor heat exchanger as an evaporator and the outdoor heat exchanger as a condenser, the heating operation using the indoor heat exchanger as a condenser and the outdoor heat exchanger as an evaporator, and the cooling cycle One of the indoor heat exchangers is an evaporator, the other is a condenser, the cooling cycle dehumidifying operation using the outdoor heat exchanger as a condenser, and one of the indoor heat exchangers in the heating cycle is a condenser and the other is evaporated And having a function of switching to a heating cycle dehumidifying operation using the outdoor heat exchanger as an evaporator,
In the automatic operation mode, the cooling cycle and the heating cycle are automatically switched based on the level of the set room temperature and the room temperature, and based on the difference between the set room temperature and the room temperature in the switched cooling cycle. Te, the cooling operation and automatically switching between the cooling cycle and dehumidifying operation, the air conditioner characterized by having an automatic switching function between the heating cycle dehumidifying operation and the heating operation in the switched heating cycle Machine.

In Claim 1 , the difference between the set room temperature and the room temperature when automatically switching between the cooling operation and the cooling cycle dehumidifying operation in the switched cooling cycle is the difference between the cooling operation and the cooling cycle dehumidifying operation. Preset to a specific temperature difference in the cooling cycle suitable for switching, and set the difference between the set indoor temperature and the indoor temperature when automatically switching between the heating operation and the heating cycle dehumidifying operation in the switched heating cycle An air conditioner characterized in that it is set in advance to a specific temperature difference in a heating cycle suitable for switching between the heating operation and the heating cycle dehumidifying operation .

Rotational speed variable capacity compressor, outdoor heat exchanger, thermally divided indoor heat exchanger, and between the outdoor heat exchanger and the indoor heat exchanger for cooling operation and heating operation An air conditioning and heating device that sometimes squeezes, a dehumidifying device that is disposed between the two divided indoor heat exchangers and performs a squeezing operation during a dehumidifying operation, the compressor, the outdoor heat exchanger, and the indoor heat An operation switching valve that is arranged between the cooling unit and switches between a cooling cycle that leads the refrigerant discharged from the compressor to the outdoor heat exchanger and a heating cycle that leads to the indoor heat exchanger; Means for detecting indoor humidity, means for setting a set room temperature or means for setting a set room humidity, and a control device for controlling the compressor, the air conditioning / heating device, the dehumidifying device, and the operation switching valve. With
The controller is
In the cooling operation using the indoor heat exchanger as an evaporator and the outdoor heat exchanger as a condenser, the heating operation using the indoor heat exchanger as a condenser and the outdoor heat exchanger as an evaporator, and the cooling cycle One of the indoor heat exchangers is an evaporator, the other is a condenser, the cooling cycle dehumidifying operation using the outdoor heat exchanger as a condenser, and one of the indoor heat exchangers in the heating cycle is a condenser and the other is evaporated And having a function of switching to a heating cycle dehumidifying operation using the outdoor heat exchanger as an evaporator,
An air conditioner having a function of controlling only the rotational speed of the compressor based on a set room temperature and a room temperature or a set room humidity and a room humidity during a heating cycle dehumidifying operation.

A compressor, an outdoor heat exchanger, a thermally divided indoor heat exchanger, and an air conditioner that is arranged between the outdoor heat exchanger and the indoor heat exchanger and performs a throttling action during cooling operation and heating operation A throttling device, a throttling device for dehumidification that is disposed between the two divided indoor heat exchangers and performs a throttling operation during a dehumidifying operation, and is disposed between the compressor, the outdoor heat exchanger, and the indoor heat exchanger An operation switching valve that switches between a cooling cycle that leads the refrigerant discharged from the compressor to the outdoor heat exchanger and a heating cycle that leads to the indoor heat exchanger, and the dehumidifying throttle device and the operation switching valve are controlled. Equipped with a control device,
The controller is
In the cooling operation using the indoor heat exchanger as an evaporator and the outdoor heat exchanger as a condenser, the heating operation using the indoor heat exchanger as a condenser and the outdoor heat exchanger as an evaporator, and the cooling cycle One of the indoor heat exchangers is an evaporator, the other is a condenser, the cooling cycle dehumidifying operation using the outdoor heat exchanger as a condenser, and one of the indoor heat exchangers in the heating cycle is a condenser and the other is evaporated And having a function of switching to a heating cycle dehumidifying operation using the outdoor heat exchanger as an evaporator,
An air conditioner having a function of controlling only the throttle amount of the dehumidifying throttle device during the heating cycle dehumidifying operation based on the set indoor humidity and the indoor humidity.