JP4407089B2 - Refrigerant system address setting method for air conditioner - Google Patents

Refrigerant system address setting method for air conditioner Download PDF

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JP4407089B2
JP4407089B2 JP2001286177A JP2001286177A JP4407089B2 JP 4407089 B2 JP4407089 B2 JP 4407089B2 JP 2001286177 A JP2001286177 A JP 2001286177A JP 2001286177 A JP2001286177 A JP 2001286177A JP 4407089 B2 JP4407089 B2 JP 4407089B2
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refrigerant
outdoor
unit
indoor
temperature
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JP2003090585A (en
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伸廣 楠本
テュイヤ アウン
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Fujitsu General Ltd
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【０００１】
【発明の属する技術分野】
本発明は室外機に室内機を配管接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外機及び室内機の信号線を同一の通信線を介して接続してなる空気調和システムにおける、冷媒系統判定方法及び冷媒系統アドレス設定方法に関する。
【０００２】
【従来の技術】
大型ビル等に設置される空気調和システムは、図１に示すように、複数の室外機を設け、同室外機のそれぞれに複数の室内機を接続したものが一般的である。
このような空気調和システムでは、制御信号等を伝送するための信号線はできるだけ短く抑えるため、１本の通信線に、複数の室外機及び複数の室内機の信号線を接続する、所謂バス型接続が採用されている。
このバス型接続では、異なる冷媒系統の室外機及び室内機の信号線が同一の通信線に接続されるため、物理的には通信可能な状態となる。
そこで、室外機と室内機の冷媒系統の対応関係を明確にする必要がある。
従来、この対応関係を明確にするため、各室外機及び室内機にアドレスを設定するスイッチを設け、設置時に前記スイッチを操作することにより各室外機及び室内機の冷媒系統に対応するアドレスを冷媒系統アドレスとして設定するようにしていた。
例えば、室外機のアドレスＡに対応する室内機の冷媒系統アドレスをＡ１からＡｎまで割り当てて設定するようにしていた。
しかし、このアドレス設定方法では、多くの室外機及び室内機のスイッチを手で操作して設定するため、誤設定が発生することがあり、これを見付けるのに、多大の工数が必要となり、工事費用の増加の原因となっていた。
そこで、近年、この問題を解決するための方法として、室外機と室内機の冷媒系統の対応関係を自動的に検出して自動的に冷媒系統アドレスを設定する、自動アドレス設定方法が知られている。
この自動アドレス設定方法においては、室外機に備える圧縮機の運転前後の室内熱交換器温度の変化を監視し、その運転前後での温度差が所定の値以上となったとき、その室内機の冷媒系統が前記室外機の冷媒系統であると判定するものである。
しかし、この空気調和機の冷媒系統アドレス設定方法では、室内熱交換器の温度の変化により判定するが、この室内熱交換器の温度は季節、特に外気温度に影響され易く、例えば、外気温度が高い時に冷房すると、その室内熱交換器の温度が顕著に変化するが、外気温度が低い時はその変化があまり顕著に現れないため、冷媒系統の判定が出来ない場合が発生する。
【０００３】
【発明が解決しようとする課題】
本発明は以上述べた問題点を解決し、外部環境に影響されずに各室外機に接続されている室内機の冷媒系統を正しく判定することができ、正しい冷媒系統アドレスを自動的に設定することのできる空気調和機の冷媒系統アドレス設定方法及び冷媒系統アドレス設定方法を提供することを目的としている。
【０００４】
【課題を解決するための手段】
本発明は上述の課題を解決するため、圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記室外機の室外制御手段が温度センサの検出した外気温度により、冷房運転モードまたは暖房運転モードを選択し、圧縮機の運転を開始して冷媒を前記室内機に供給した後、室外機側の冷媒温度と室内機側の冷媒温度を検出して比較し、その比較結果が所定の温度差以下となったとき、同室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにした空気調和機の冷媒系統アドレス設定方法としている。
【０００５】
前記圧縮機の運転を開始して冷媒を前記室内機に供給した後、室外機側の冷媒温度と室内機側の冷媒温度を検出して比較し、その比較結果が所定の温度差以下となり、その後、前記圧縮機の運転を停止して前記室内機への冷媒の供給を止め、前記室内熱交換器への吸込み空気の温度（吸込み温度）と室内熱交換器の冷媒流出側の温度（冷媒流出温度）を検出して比較し、その比較結果が所定の温度差以下となったとき、同室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにした空気調和機の冷媒系統アドレス設定方法としている。
【０００６】
前記室外制御手段が冷房運転モードを選択した時は、前記室内機側の冷媒温度を、室内熱交換器の冷媒流入側の温度（冷房時冷媒流入温度）とし、前記室外機側の冷媒温度を前記圧縮機の吸込側の冷媒温度（低圧飽和温度）とした空気調和機の冷媒系統アドレス設定方法としている。
【０００７】
前記室外制御手段が暖房運転モードを選択した時は、前記室内機側の冷媒温度を、室内熱交換器の冷媒流出側の温度（暖房時冷媒流出温度）とし、前記室外機側の冷媒温度を前記圧縮機の吐出側の冷媒温度（高圧吐出温度）とした空気調和機の冷媒系統アドレス設定方法としている。
【０００８】
圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて冷房運転モードを選択し、当該室外機及び前記室内機を冷房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流入温度（Ｔｉｎ）と前記低圧飽和温度（Ｔｅ）を検出して比較し、一定時間内に、その差（Ｔｉｎ−Ｔｅ）が所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）となった場合、その室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにした空気調和機の冷媒系統アドレス設定方法としている。
【０００９】
圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて冷房運転モードを選択し、当該室外機及び前記室内機を冷房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流入温度（Ｔｉｎ）と前記低圧飽和温度（Ｔｅ）を検出して比較し、一定時間内に、その差（Ｔｉｎ−Ｔｅ）が所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、
一定時間経過後、前記圧縮機を停止し、前記一定時間内に、所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）となった室内機の前記電子膨張弁を全閉すると共に、送風ファンを回転させた後、前記室内熱交換器に吸込まれる空気の吸込み温度（Ｔａ）と同室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）を検出して比較し、一定時間内に、その差（Ｔａ−Ｔｏｕｔ）が所定の温度差（β）以下、即ち（Ｔａ−Ｔｏｕｔ）＜（β）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（β）以下、即ち（Ｔａ−Ｔｏｕｔ）＜（β）となった室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにした空気調和機の冷媒系統アドレス設定方法としている。
【００１０】
圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて暖房運転モードを選択し、当該室外機及び前記室内機を暖房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）と前記高圧吐出温度（Ｔｃ）を検出して比較し、一定時間内に、その差（Ｔｃ−Ｔｏｕｔ）が所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）となった場合、その室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにした空気調和機の冷媒系統アドレス設定方法としている。
【００１１】
圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて暖房運転モードを選択し、当該室外機及び前記室内機を暖房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）と前記高圧吐出温度（Ｔｃ）を検出して比較し、一定時間内に、その差（Ｔｃ−Ｔｏｕｔ）が所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、
一定時間経過後、前記圧縮機を停止し、前記一定時間内に、所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）となった室内機の前記電子膨張弁を全閉すると共に、送風ファンを回転させた後、前記室内熱交換器に吸込まれる空気の吸込み温度（Ｔａ）と同室内熱交換器の暖房時冷媒流出温度（Ｔｏｕｔ）を検出して比較し、一定時間内に、その差（Ｔｏｕｔ−Ｔａ）が所定の温度差（β’）以下、即ち（Ｔｏｕｔ−Ｔａ）＜（β’）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（β）以下、即ち（Ｔｏｕｔ−Ｔａ）＜（β’）となった室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにした空気調和機の冷媒系統アドレス設定方法としている。
【００１２】
前記室内機には、例えばマイコンのＩＤのようにそれぞれ異なるＩＤを含むノード情報が予め記憶されており、前記室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定された場合、同室内機の室内制御手段より当該室外機の室外制御手段に対して前記ノード情報を送信し、同室外制御手段が同ノード情報を基に、同室内機の冷媒系統アドレスを順次割り当てるようにした空気調和機の冷媒系統アドレス設定方法としている。
【００１３】
【発明の実施の形態】
以下、図面に基づいて本発明による空気調和機の冷媒系統アドレス設定方法を詳細に説明する。
図１は本発明の実施例を示す空気調和システムの概略図、図２は空気調和機の冷凍サイクル（冷媒系統）を示す冷媒回路図、図３は空気調和機の制御ブロック図である。
図１に示すように、室外機１に対して複数の室内機２が冷媒配管３により接続され、同一の冷媒系統Ａ（Ｂ，Ｃ）を構成してた分離型の空気調和機を複数配設して空気調和システムを構築している。
そして、この空気調和システムを構築している全ての室外機１及び室内機２の信号線は１本の通信線４により接続されている。
図２に示すように、前記各室外機１には圧縮機５、四方弁６及び、室外熱交換器７を備え、また、前記各室内機２には室内熱交換器８及び、電子膨張弁９を備え、これらを順次接続して冷凍サイクル（冷媒系統）を構成している。
さらに、図２及び図３に示すように、前記室外機１には前記圧縮機５の吸込み側の温度（低圧飽和温度（Ｔｅ））を検出する温度センサ１０ａ、圧縮機５の吐出側の温度（高圧吐出温度（Ｔｃ））を検出する温度センサ１０ｂ、外気温度（Ｔｏ）を検出する温度センサ１０ｃ及び室外制御手段１１を備え、前記室内機２には前記室内熱交換器８に室内空気を流通する送風ファン１２、同室内熱交換器８の前記電子膨張弁９側の温度（冷房時冷媒流入温度（Ｔｉｎ）または冷房時冷媒流出温度（Ｔｏｕｔ））を検出する温度センサ１３ａ、同室内熱交換器８の温度センサ１３ａと反対側の温度（暖房時冷媒流出温度（Ｔｏｕｔ）または暖房時冷媒流入温度（Ｔｉｎ））を検出する温度センサ１３ｂ、室内熱交換器８に吸込まれる室内空気の温度（吸気温度（Ｔａ））を検出する温度センサ１３ｃ及び室内制御手段１４を備えている。
また、前記室外制御手段１１は前記温度センサ１０ａ、１０ｂ、１０ｃよりの検出信号を入力する温度センサ入力部１１ａと、前記圧縮機５及び四方弁６を駆動する駆動部１１ｂと、前記通信線を介して室内機２と信号を送受信する通信部１１ｃと、これらを制御する制御部１１ｄとで構成されている。
また、前記室内制御手段１４は前記温度センサ１３ａと、温度センサ１３ｂと、温度センサ１３ｃよりの検出信号を入力する温度センサ入力部１４ａと、前記電子膨張弁９を駆動する弁駆動部１４ｂと、前記送風ファンを駆動するファン駆動部１４ｃと、前記通信線４を介して室内機２と信号を送受信する通信部１４ｄと、冷媒系統アドレス設定・記憶部１４ｅと、これらを制御すると共に、例えばマイコンのＩＤのようにそれぞれ異なるＩＤを含むノード情報を記憶する制御部１４ｆとで構成されている。
【００１４】
以上の構成において、つぎにその動作を説明する。
図４及び図５は本発明による空気調和機の冷媒系統アドレス設定方法を説明するための動作フローチャートで、図４は冷房運転モード選択時、図５は暖房運転モード選択時の動作フローチャートである。
図４に示すように、前記室外機１の任意の１台（仮にＡとする）の室外制御手段１１は、例えば、同室外制御手段１１に備える図示しない冷媒系統判定ボタンを押すことにより制御部１１ｄに組み込まれる冷媒系統判定及び冷媒系統アドレス設定プログラムが起動され、まず、冷媒系統判定が開始される（ｓｔ１）。
冷媒系統判定が開始されると、前記空気調和システムを構成する全ての室外機１及び室内機２の運転を停止（ｓｔ２）した後、当該室外機（Ａ）１が温度センサ１０ｃにより外気温度（Ｔｏ）を検出し、同外気温度（Ｔｏ）が所定の温度（Ｔｓ）を超える場合は冷房運転モードに、所定の温度（Ｔｓ）以下の場合は暖房運転モードを選択（ｓｔ３）する。
（ｓｔ３）で冷房運転モードが選択された場合は同図４、暖房運転モードが選択された場合は図５に進む。
そして、圧縮機の運転を開始して冷媒の供給を開始する（ｓｔ４）。
（ｓｔ３）で冷房運転モードが選択され、（ｓｔ４）で冷媒の供給を開始すると、前記温度センサ１３ａよりの各室内熱交換器の冷房時冷媒流入温度（Ｔｉｎ）と前記温度センサ１０ａよりの前記低圧飽和温度（Ｔｅ）を検出し（ｓｔ５）、前記各室内熱交換器の冷媒流入温度（Ｔｉｎ）と前記低圧飽和温度（Ｔｅ）との差が所定の温度（α）以下となるか比較される（ｓｔ６）。
（ｓｔ６）で（Ｔｉｎ）＜（Ｔｅ＋α）とならなかった場合は所定の時間（例えば９０秒間）、（ｓｔ５）と（ｓｔ６）とを繰り返し（ｓｔ７）、９０秒間経っても、（Ｔｉｎ）＜（Ｔｅ＋α）とならなかった場合は、室内機２の冷媒系統が前記室外機１の冷媒系統に対応しないと判定して、この室内機の判定を終了する（ｓｔ８）。
また、前記一定時間（９０秒間）内に、（ｓｔ６）で（Ｔｉｎ）＜（Ｔｅ＋α）となった場合、前記圧縮機５を停止し、室内機２の前記電子膨張弁９を全閉すると共に、送風ファン１２を回転させた（ｓｔ９）後、前記温度センサ１３ｃよりの前記室内熱交換器に吸込まれる空気の吸気温度（Ｔａ）と前記温度センサ１３ｂよりの同室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）を検出（ｓｔ１０）し、この検出した冷媒流出温度（Ｔｏｕｔ）と吸気温度（Ｔａ）との差が所定の温度（β）以下になるか比較する（ｓｔ１１）。
そして、（ｓｔ１１）で（Ｔｏｕｔ）＞（Ｔａ−β）とならなかった場合は所定の時間（例えば９０秒間）、（ｓｔ１０）及び（ｓｔ１１）を繰り返し（ｓｔ１２）、（ｓｔ１２）で所定の時間（９０秒間）経っても、（Ｔｏｕｔ）＞（Ｔａ−β）とならなかった場合は、この室内機２の冷媒系統が前記室外機１の冷媒系統に対応しないと判定して終了する（ｓｔ８）。
また、前記所定時間（９０秒間）内に、（ｓｔ１１）で（Ｔｏｕｔ）＞（Ｔａ−β）となった場合は、この室内機２の冷媒系統が前記室外機１の冷媒系統に対応すると判定し、この判定された室内機２の室内制御手段１４は、当該室外機１（Ａ）の室外制御手段１１に前記ノード情報を送信し、室外制御手段１１はこれを記憶する（ｓｔ１３）。
そして、前記所定時間（９０秒間）経過すると冷媒系統アドレス設定が開始される。
【００１５】
（ｓｔ３）で暖房運転モードが選択され、（ｓｔ４）で冷媒の供給を開始すると、前記温度センサ１３ｂよりの各室内熱交換器の暖房時冷媒流入温度（Ｔｉｎ）と前記温度センサ１０ｂよりの前記高圧吐出温度（Ｔｃ）を検出し（ｓｔ５’）、前記各室内熱交換器の暖房時冷媒流入温度（Ｔｉｎ）と前記高圧吐出温度（Ｔｃ）との差が所定の温度（α’）以下となるか比較される（ｓｔ６’）。
（ｓｔ６’）で（Ｔｃ）＜（Ｔｉｎ＋α’）とならなかった場合は所定の時間（例えば９０秒間）、（ｓｔ５’）と（ｓｔ６’）とを繰り返し（ｓｔ７’）、９０秒間経っても、（Ｔｃ）＜（Ｔｉｎ＋α’）とならなかった場合は、室内機２の冷媒系統が前記室外機１の冷媒系統に対応しないと判定して、この室内機の判定を終了する（ｓｔ８’）。
また、前記一定時間（９０秒間）内に、（ｓｔ６’）で（Ｔｃ）＜（Ｔｉｎ＋α’）となった場合、前記圧縮機５を停止し、室内機２の前記電子膨張弁９を全閉すると共に、送風ファン１２を回転させた（ｓｔ９’）後、前記温度センサ１３ｃよりの前記室内熱交換器に吸込まれる空気の吸気温度（Ｔａ）と前記温度センサ１３ａよりの同室内熱交換器の暖房時冷媒流出温度（Ｔｏｕｔ）を検出（ｓｔ１０’）し、この検出した暖房時冷媒流出温度（Ｔｏｕｔ）と吸気温度（Ｔａ）との差が所定の温度（β’）以下になるか比較する（ｓｔ１１’）。
そして、（ｓｔ１１’）で（Ｔａ）＞（Ｔｏｕｔ−β’）とならなかった場合は所定の時間（例えば９０秒間）、（ｓｔ１０’）及び（ｓｔ１１’）を繰り返し（ｓｔ１２’）、（ｓｔ１２’）で所定の時間（９０秒間）経っても、（Ｔａ）＞（Ｔｏｕｔ−β’）とならなかった場合は、この室内機２の冷媒系統が前記室外機１の冷媒系統に対応しないと判定して終了する（ｓｔ８’）。
また、前記所定時間（９０秒間）内に、（ｓｔ１１’）で（Ｔａ）＞（Ｔｏｕｔ−β’）となった場合は、この室内機２の冷媒系統が前記室外機１の冷媒系統に対応すると判定し、この判定された室内機２の室内制御手段１４は、当該室外機１（Ａ）の室外制御手段１１に前記ノード情報を送信し、室外制御手段１１はこれを記憶する（ｓｔ１３’）。
そして、前記所定時間（９０秒間）経過すると冷媒系統アドレス設定が開始される。
【００１６】
図６は本発明による空気調和機の冷媒系統アドレス設定方法を説明するための動作フローチャートである。
図４の（ｓｔ１３）において、当該室外機１（Ａ）の冷媒系統に対応する室内機２としてそのノード情報が記憶され、所定時間（９０秒間）経過すると、冷媒系統アドレス設定が開始（ｓｔ２０）され、前記室外制御手段１１はそのノード情報に含まれる前記ＩＤの若い方から順番に冷媒系統アドレス（Ａ１、Ａ２、・・・Ａｎ）を割り振り（ＳＴ２１）、これを前記各室内機２に送信する（ＳＴ２２）。
これを受信した各室内機２はこの冷媒系統アドレス（Ａ１、Ａ２、・・・又はＡｎ）を前記冷媒系統アドレス設定・記憶部１４ｅに書き込み記憶する（ＳＴ２３）。
【００１７】
【発明の効果】
以上説明したように、本発明による空気調和機の冷媒系統アドレス設定方法によれば、圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記圧縮機の運転を開始して冷媒を前記室内機に供給した後、室外機側の冷媒温度と室内機側の冷媒温度を検出して比較し、その比較結果が所定の温度差以下となったとき、同室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定するようにしたので、外気温度等の外部環境の変化に係りなく正確に冷媒系統を判定することが出来、また、対応すると判定された室内機の冷媒系統アドレスを各室内機特有のノード情報を基準に当該室外機の冷媒系統の１つとして設定又は更新するようにしたので、冷媒系統アドレスが重複することもなく、正確に割り振ることができる。
【図面の簡単な説明】
【図１】従来または本発明の空気調和システムの概略図である。
【図２】本発明の空気調和機の冷凍サイクル（冷媒系統）を示す冷媒回路図である。
【図３】本発明の空気調和機の制御ブロック図である。
【図４】本発明による空気調和機の冷媒系統アドレス設定方法を説明するための冷房運転モード選択時の動作フローチャートである。
【図５】本発明による空気調和機の冷媒系統アドレス設定方法を説明するための暖房運転モード選択時の動作フローチャートである。
【図６】本発明による空気調和機の冷媒系統アドレス設定方法を説明するための動作フローチャートである。
【符号の説明】
１ 室外機
２ 室内機
３ 冷媒配管
４ 通信線
５ 圧縮機
６ 四方弁
７ 室外熱交換器
８ 室内熱交換器
９ 電子膨張弁
１０ａ、１０ｂ、１０ｃ 温度センサ
１１ 室外制御手段
１１ａ 温度センサ入力部
１１ｂ 駆動部
１１ｃ 通信部
１１ｄ 制御部
１２ 送風ファン
１３ａ、１３ｂ、１３ｃ 温度センサ
１４ 室内制御手段
１４ａ 温度センサ入力部
１４ｂ 弁駆動部
１４ｃ ファン駆動部
１４ｄ 通信部
１４ｅ 冷媒系統アドレス設定・記憶部
１４ｆ 制御部[0001]
BACKGROUND OF THE INVENTION
In the present invention, a plurality of separation-type air conditioners constituting the same refrigerant system are connected by piping the indoor unit to the outdoor unit, and the signal lines of the outdoor unit and the indoor unit are connected through the same communication line. The present invention relates to a refrigerant system determination method and a refrigerant system address setting method in an air conditioning system.
[0002]
[Prior art]
As shown in FIG. 1, an air conditioning system installed in a large building or the like is generally provided with a plurality of outdoor units and a plurality of indoor units connected to each of the outdoor units.
In such an air conditioning system, a signal line for transmitting a control signal or the like is kept as short as possible, and so-called bus type in which a plurality of outdoor units and a plurality of indoor unit signal lines are connected to one communication line. Connection is adopted.
In this bus type connection, the outdoor unit of different refrigerant systems and the signal line of the indoor unit are connected to the same communication line, so that they are physically communicable.
Therefore, it is necessary to clarify the correspondence between the outdoor unit and the refrigerant system of the indoor unit.
Conventionally, in order to clarify this correspondence, a switch for setting an address is provided for each outdoor unit and indoor unit, and the address corresponding to the refrigerant system of each outdoor unit and indoor unit is set by operating the switch during installation. It was set as a system address.
For example, the indoor unit refrigerant system address corresponding to the outdoor unit address A is assigned and set from A1 to An.
However, in this address setting method, many outdoor units and indoor unit switches are set by hand, so erroneous settings may occur. To find this, it takes a lot of man-hours and This was an increase in costs.
Therefore, in recent years, as a method for solving this problem, an automatic address setting method is known in which the correspondence between the outdoor unit and the refrigerant system of the indoor unit is automatically detected and the refrigerant system address is automatically set. Yes.
In this automatic address setting method, the change in the indoor heat exchanger temperature before and after the operation of the compressor provided in the outdoor unit is monitored, and when the temperature difference before and after the operation becomes a predetermined value or more, It is determined that the refrigerant system is the refrigerant system of the outdoor unit.
However, in the refrigerant system address setting method of this air conditioner, the determination is made based on a change in the temperature of the indoor heat exchanger. However, the temperature of the indoor heat exchanger is easily affected by the season, particularly the outside air temperature. When the air is cooled at a high temperature, the temperature of the indoor heat exchanger changes remarkably. However, when the outside air temperature is low, the change does not appear so noticeably, and the refrigerant system cannot be determined.
[0003]
[Problems to be solved by the invention]
The present invention solves the above-described problems, can correctly determine the refrigerant system of the indoor unit connected to each outdoor unit without being affected by the external environment, and automatically sets the correct refrigerant system address. An object of the present invention is to provide a refrigerant system address setting method and a refrigerant system address setting method of an air conditioner that can be used.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit, an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor unit. A plurality of separation-type air conditioners constituting the same refrigerant system by connecting indoor units having control means, and the same communication line as the signal line connected to each of the outdoor control means and the indoor control means. In the air conditioning system connected through
The outdoor control means of the outdoor unit selects the cooling operation mode or the heating operation mode according to the outside air temperature detected by the temperature sensor, starts the operation of the compressor and supplies the refrigerant to the indoor unit. The refrigerant temperature and the indoor unit refrigerant temperature are detected and compared, and when the comparison result is equal to or less than a predetermined temperature difference, it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and The refrigerant system address setting method of the air conditioner is such that the refrigerant system address is set for the indoor unit determined to correspond to the refrigerant system of the outdoor unit.
[0005]
After starting the operation of the compressor and supplying the refrigerant to the indoor unit, the refrigerant temperature on the outdoor unit side and the refrigerant temperature on the indoor unit side are detected and compared, and the comparison result is a predetermined temperature difference or less, Thereafter, the operation of the compressor is stopped to stop the supply of the refrigerant to the indoor unit, and the temperature of the intake air to the indoor heat exchanger (intake temperature) and the temperature of the refrigerant outflow side of the indoor heat exchanger (refrigerant) When the comparison result is equal to or less than a predetermined temperature difference, it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and the refrigerant system of the outdoor unit is The refrigerant system address setting method of the air conditioner is such that the refrigerant system address is set for the indoor unit determined to be compatible.
[0006]
When the outdoor control means selects the cooling operation mode, the refrigerant temperature on the indoor unit side is set to the temperature on the refrigerant inflow side of the indoor heat exchanger (cooling refrigerant inflow temperature), and the refrigerant temperature on the outdoor unit side is set to The refrigerant system address setting method of the air conditioner is set to the refrigerant temperature (low pressure saturation temperature) on the suction side of the compressor.
[0007]
When the outdoor control means selects the heating operation mode, the refrigerant temperature on the indoor unit side is set as the refrigerant outflow side temperature of the indoor heat exchanger (heating outflow refrigerant temperature), and the refrigerant temperature on the outdoor unit side is set to The refrigerant system address setting method of the air conditioner is set to the refrigerant temperature (high pressure discharge temperature) on the discharge side of the compressor.
[0008]
An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line, Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the cooling operation mode is selected based on the outside air temperature, the compressor is started to operate by setting the outdoor unit and the indoor unit to the cooling operation mode, and the refrigerant is supplied. Open If you have,
The refrigerant inflow temperature (Tin) during cooling of each indoor heat exchanger and the low-pressure saturation temperature (Te) are detected and compared, and the difference (Tin−Te) is a predetermined temperature difference (α) within a certain time. In other words, it is determined that the refrigerant system of the indoor unit that does not satisfy (Tin <Te + α) does not correspond to the refrigerant system of the outdoor unit, and within the predetermined time, a predetermined temperature difference (α) or less, that is, (Tin < Te + α), it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and the refrigerant system address is set for the indoor unit determined to correspond to the refrigerant system of the outdoor unit. This is the refrigerant system address setting method for the air conditioner.
[0009]
An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line, Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the cooling operation mode is selected based on the outside air temperature, the compressor is started to operate by setting the outdoor unit and the indoor unit to the cooling operation mode, and the refrigerant is supplied. Open If you have,
The refrigerant inflow temperature (Tin) during cooling of each indoor heat exchanger and the low-pressure saturation temperature (Te) are detected and compared, and the difference (Tin−Te) is a predetermined temperature difference (α) within a certain time. In the following, it is determined that the refrigerant system of the indoor unit that did not become (Tin <Te + α) does not correspond to the refrigerant system of the outdoor unit,
After a certain period of time, the compressor is stopped, and the electronic expansion valve of the indoor unit that is equal to or smaller than a predetermined temperature difference (α), that is, (Tin <Te + α) within the certain period of time is fully closed, and air is blown. After rotating the fan, the air suction temperature (Ta) of air sucked into the indoor heat exchanger is detected and compared with the cooling outflow temperature (Tout) during cooling of the indoor heat exchanger, and within a certain time, It is determined that the refrigerant system of the indoor unit whose difference (Ta-Tout) is equal to or less than a predetermined temperature difference (β), that is, (Ta−Tout) <(β) does not correspond to the refrigerant system of the outdoor unit, It is determined that the refrigerant system of the indoor unit corresponding to the predetermined temperature difference (β) or less, that is, (Ta−Tout) <(β), corresponds to the refrigerant system of the outdoor unit within the predetermined time. Refrigerant system address for indoor units determined to correspond to the refrigerant system And a refrigerant system address setting method of an air conditioner as set.
[0010]
An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line, Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the heating operation mode is selected based on the outside air temperature, the compressor is started to operate with the outdoor unit and the indoor unit being in the heating operation mode, and the refrigerant is supplied. Open If you have,
The refrigerant outflow temperature during cooling (Tout) and the high-pressure discharge temperature (Tc) of each indoor heat exchanger are detected and compared, and the difference (Tc−Tout) within a predetermined time becomes a predetermined temperature difference (α ′ ), That is, it is determined that the refrigerant system of the indoor unit that did not satisfy (Tc <Tout + α ′) does not correspond to the refrigerant system of the outdoor unit, and within the predetermined time, When (Tc <Tout + α ′), it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and the refrigerant system address for the indoor unit determined to correspond to the refrigerant system of the outdoor unit Is set as the refrigerant system address setting method of the air conditioner.
[0011]
An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line, Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the heating operation mode is selected based on the outside air temperature, the compressor is started to operate with the outdoor unit and the indoor unit being in the heating operation mode, and the refrigerant is supplied. Open If you have,
The refrigerant outflow temperature during cooling (Tout) and the high-pressure discharge temperature (Tc) of each indoor heat exchanger are detected and compared, and the difference (Tc−Tout) within a predetermined time becomes a predetermined temperature difference (α ′ ) It is determined that the refrigerant system of the indoor unit that did not satisfy (Tc <Tout + α ′) below does not correspond to the refrigerant system of the outdoor unit,
After a predetermined time has elapsed, the compressor is stopped, and the electronic expansion valve of the indoor unit that is equal to or smaller than a predetermined temperature difference (α ′), that is, (Tc <Tout + α ′) within the predetermined time is fully closed. Then, after rotating the blower fan, the suction temperature (Ta) of the air sucked into the indoor heat exchanger is detected and compared with the refrigerant outlet temperature (Tout) during heating of the indoor heat exchanger, and within a certain time Furthermore, the refrigerant system of the indoor unit in which the difference (Tout−Ta) is not more than the predetermined temperature difference (β ′), that is, (Tout−Ta) <(β ′) does not correspond to the refrigerant system of the outdoor unit. It is determined that the refrigerant system of the indoor unit in which the predetermined temperature difference (β) or less, that is, (Tout−Ta) <(β ′), corresponds to the refrigerant system of the outdoor unit within the predetermined time. For the indoor unit that is determined to correspond to the refrigerant system of the outdoor unit, And a refrigerant system address setting method of an air conditioner so as to set the address.
[0012]
Node information including different IDs such as microcomputer IDs is stored in advance in the indoor unit, and when it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, Air conditioner in which the indoor control means of the unit transmits the node information to the outdoor control means of the outdoor unit, and the outdoor control means sequentially assigns the refrigerant system address of the indoor unit based on the node information. This is the refrigerant system address setting method.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a refrigerant system address setting method for an air conditioner according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram of an air conditioning system showing an embodiment of the present invention, FIG. 2 is a refrigerant circuit diagram showing a refrigeration cycle (refrigerant system) of the air conditioner, and FIG. 3 is a control block diagram of the air conditioner.
As shown in FIG. 1, a plurality of separated air conditioners each having a plurality of indoor units 2 connected to an outdoor unit 1 by a refrigerant pipe 3 and constituting the same refrigerant system A (B, C) are arranged. An air conditioning system has been established.
The signal lines of all the outdoor units 1 and indoor units 2 that construct this air conditioning system are connected by a single communication line 4.
As shown in FIG. 2, each outdoor unit 1 includes a compressor 5, a four-way valve 6, and an outdoor heat exchanger 7, and each indoor unit 2 includes an indoor heat exchanger 8 and an electronic expansion valve. 9 are connected sequentially to constitute a refrigeration cycle (refrigerant system).
Further, as shown in FIGS. 2 and 3, the outdoor unit 1 includes a temperature sensor 10 a that detects a temperature on the suction side of the compressor 5 (low pressure saturation temperature (Te)), and a temperature on the discharge side of the compressor 5. A temperature sensor 10b for detecting (high pressure discharge temperature (Tc)), a temperature sensor 10c for detecting the outside air temperature (To), and an outdoor control means 11 are provided, and the indoor unit 2 supplies indoor air to the indoor heat exchanger 8. A circulating fan 12, a temperature sensor 13 a that detects the temperature of the electronic expansion valve 9 side of the indoor heat exchanger 8 (cooling refrigerant inflow temperature (Tin) or cooling refrigerant outflow temperature (Tout)), and indoor heat The temperature sensor 13b for detecting the temperature (the heating refrigerant outflow temperature (Tout) or the heating refrigerant inflow temperature (Tin)) on the opposite side of the temperature sensor 13a of the exchanger 8, and the indoor air sucked into the indoor heat exchanger 8 temperature And a temperature sensor 13c and the indoor control unit 14 detects the intake air temperature (Ta)).
The outdoor control means 11 includes a temperature sensor input unit 11a that inputs detection signals from the temperature sensors 10a, 10b, and 10c, a drive unit 11b that drives the compressor 5 and the four-way valve 6, and the communication line. The communication unit 11c transmits and receives signals to and from the indoor unit 2 and the control unit 11d that controls these units.
The indoor control means 14 includes a temperature sensor 13a, a temperature sensor 13b, a temperature sensor input unit 14a for inputting a detection signal from the temperature sensor 13c, a valve drive unit 14b for driving the electronic expansion valve 9, A fan drive unit 14c for driving the blower fan, a communication unit 14d for transmitting / receiving signals to / from the indoor unit 2 via the communication line 4, a refrigerant system address setting / storage unit 14e, and controlling these, for example, a microcomputer The control unit 14f stores node information including different IDs such as IDs.
[0014]
Next, the operation of the above configuration will be described.
4 and 5 are operation flowcharts for explaining the refrigerant system address setting method of the air conditioner according to the present invention. FIG. 4 is an operation flowchart when the cooling operation mode is selected, and FIG. 5 is an operation flowchart when the heating operation mode is selected.
As shown in FIG. 4, an arbitrary outdoor control unit 11 (assumed to be A) of the outdoor unit 1 is controlled by, for example, pressing a refrigerant system determination button (not shown) provided in the outdoor control unit 11. The refrigerant system determination and refrigerant system address setting program incorporated in 11d is started, and first, refrigerant system determination is started (st1).
When the refrigerant system determination is started, the operation of all the outdoor units 1 and 2 constituting the air conditioning system is stopped (st2), and then the outdoor unit (A) 1 is detected by the temperature sensor 10c by the outside temperature ( To) is detected, and when the outside air temperature (To) exceeds a predetermined temperature (Ts), the cooling operation mode is selected, and when it is equal to or lower than the predetermined temperature (Ts), the heating operation mode is selected (st3).
When the cooling operation mode is selected in (st3), the process proceeds to FIG. 4, and when the heating operation mode is selected, the process proceeds to FIG.
Then, the operation of the compressor is started and the supply of the refrigerant is started (st4).
When the cooling operation mode is selected in (st3) and the supply of the refrigerant is started in (st4), the cooling refrigerant inflow temperature (Tin) of each indoor heat exchanger from the temperature sensor 13a and the temperature sensor 10a A low-pressure saturation temperature (Te) is detected (st5), and the difference between the refrigerant inflow temperature (Tin) of each indoor heat exchanger and the low-pressure saturation temperature (Te) is compared with a predetermined temperature (α) or less. (St6).
If (Tin) <(Te + α) is not satisfied in (st6), a predetermined time (for example, 90 seconds) is repeated (st5) and (st6) (st7), and (Tin) < If not (Te + α), it is determined that the refrigerant system of the indoor unit 2 does not correspond to the refrigerant system of the outdoor unit 1, and the determination of this indoor unit is terminated (st8).
Further, when (Tin) <(Te + α) in (st6) within the predetermined time (90 seconds), the compressor 5 is stopped, and the electronic expansion valve 9 of the indoor unit 2 is fully closed. After rotating the blower fan 12 (st9), the air intake temperature (Ta) of air sucked into the indoor heat exchanger from the temperature sensor 13c and the cooling of the indoor heat exchanger from the temperature sensor 13b The refrigerant outflow temperature (Tout) is detected (st10), and whether the difference between the detected refrigerant outflow temperature (Tout) and the intake air temperature (Ta) is equal to or lower than a predetermined temperature (β) is compared (st11).
If (Tout)> (Ta−β) is not satisfied in (st11), (st10) and (st11) are repeated for a predetermined time (eg, 90 seconds), (st12), and (st12) for a predetermined time If (Tout)> (Ta−β) is not satisfied after 90 seconds, it is determined that the refrigerant system of the indoor unit 2 does not correspond to the refrigerant system of the outdoor unit 1 (st8). ).
Further, if (Tout)> (Ta−β) is satisfied in (st11) within the predetermined time (90 seconds), it is determined that the refrigerant system of the indoor unit 2 corresponds to the refrigerant system of the outdoor unit 1. Then, the determined indoor control means 14 of the indoor unit 2 transmits the node information to the outdoor control means 11 of the outdoor unit 1 (A), and the outdoor control means 11 stores this (st13).
Then, when the predetermined time (90 seconds) elapses, refrigerant system address setting is started.
[0015]
When the heating operation mode is selected in (st3) and supply of the refrigerant is started in (st4), the refrigerant inflow temperature (Tin) during heating of each indoor heat exchanger from the temperature sensor 13b and the temperature sensor 10b A high pressure discharge temperature (Tc) is detected (st5 ′), and a difference between the heating refrigerant inflow temperature (Tin) and the high pressure discharge temperature (Tc) of each indoor heat exchanger is equal to or less than a predetermined temperature (α ′). Are compared (st6 ′).
If (Tc) <(Tin + α ′) is not satisfied in (st6 ′), a predetermined time (for example, 90 seconds) is repeated (st5 ′) and (st6 ′) (st7 ′). , (Tc) <(Tin + α ′), it is determined that the refrigerant system of the indoor unit 2 does not correspond to the refrigerant system of the outdoor unit 1, and the determination of this indoor unit is terminated (st8 ′). .
Further, when (Tc) <(Tin + α ′) in (st6 ′) within the predetermined time (90 seconds), the compressor 5 is stopped and the electronic expansion valve 9 of the indoor unit 2 is fully closed. In addition, after rotating the blower fan 12 (st9 '), the intake air temperature (Ta) of the air sucked into the indoor heat exchanger from the temperature sensor 13c and the indoor heat exchanger from the temperature sensor 13a The refrigerant outlet temperature (Tout) during heating is detected (st10 ′), and the difference between the detected refrigerant outlet temperature (Tout) during heating and the intake air temperature (Ta) is compared to a predetermined temperature (β ′) or less. (St11 ').
If (Ta)> (Tout−β ′) is not satisfied in (st11 ′), a predetermined time (for example, 90 seconds), (st10 ′) and (st11 ′) are repeated (st12 ′), (st12 If (Ta)> (Tout−β ′) is not satisfied even after a predetermined time (90 seconds) in “)”, the refrigerant system of the indoor unit 2 must correspond to the refrigerant system of the outdoor unit 1. The determination ends (st8 ').
If (Ta)> (Tout−β ′) in (st11 ′) within the predetermined time (90 seconds), the refrigerant system of the indoor unit 2 corresponds to the refrigerant system of the outdoor unit 1. Then, the determined indoor control unit 14 of the indoor unit 2 transmits the node information to the outdoor control unit 11 of the outdoor unit 1 (A), and the outdoor control unit 11 stores this (st13 ′). ).
Then, when the predetermined time (90 seconds) elapses, refrigerant system address setting is started.
[0016]
FIG. 6 is an operation flowchart for explaining the refrigerant system address setting method of the air conditioner according to the present invention.
In (st13) of FIG. 4, the node information is stored as the indoor unit 2 corresponding to the refrigerant system of the outdoor unit 1 (A), and when a predetermined time (90 seconds) elapses, the refrigerant system address setting starts (st20). Then, the outdoor control means 11 allocates refrigerant system addresses (A1, A2,... An) in order from the youngest ID included in the node information (ST21), and transmits this to each indoor unit 2. (ST22).
Receiving this, each indoor unit 2 writes and stores this refrigerant system address (A1, A2,... Or An) in the refrigerant system address setting / storage unit 14e (ST23).
[0017]
【The invention's effect】
As described above, according to the refrigerant system address setting method for an air conditioner according to the present invention, an electronic expansion valve, an indoor unit, an outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit are provided. A plurality of separation-type air conditioners that are connected to an indoor unit including a heat exchanger, a blower fan, a temperature sensor, and an indoor control unit to constitute the same refrigerant system are provided, and each of the outdoor control unit and the indoor control unit includes In an air conditioning system in which connected signal lines are connected via the same communication line,
After the operation of the compressor is started and the refrigerant is supplied to the indoor unit, the refrigerant temperature on the outdoor unit side and the refrigerant temperature on the indoor unit side are detected and compared, and the comparison result becomes a predetermined temperature difference or less. The refrigerant system of the indoor unit is determined to correspond to the refrigerant system of the outdoor unit, so the refrigerant system can be accurately determined regardless of changes in the external environment such as the outside air temperature, Since the refrigerant system address of the indoor unit determined to be compatible is set or updated as one of the refrigerant systems of the outdoor unit based on the node information unique to each indoor unit, the refrigerant system address does not overlap. Can be allocated accurately.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a conventional or air conditioning system of the present invention.
FIG. 2 is a refrigerant circuit diagram showing a refrigeration cycle (refrigerant system) of the air conditioner of the present invention.
FIG. 3 is a control block diagram of the air conditioner of the present invention.
FIG. 4 is an operation flowchart when a cooling operation mode is selected to explain a refrigerant system address setting method for an air conditioner according to the present invention.
FIG. 5 is an operation flowchart when a heating operation mode is selected for explaining a refrigerant system address setting method for an air conditioner according to the present invention.
FIG. 6 is an operation flowchart for explaining a refrigerant system address setting method of an air conditioner according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Indoor unit 3 Refrigerant piping 4 Communication line 5 Compressor 6 Four-way valve 7 Outdoor heat exchanger 8 Indoor heat exchanger 9 Electronic expansion valve 10a, 10b, 10c Temperature sensor 11 Outdoor control means 11a Temperature sensor input part 11b Drive Unit 11c communication unit 11d control unit 12 blower fans 13a, 13b, 13c temperature sensor 14 indoor control means 14a temperature sensor input unit 14b valve drive unit 14c fan drive unit 14d communication unit 14e refrigerant system address setting / storage unit 14f control unit

Claims (9)

圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記室外機の室外制御手段が温度センサの検出した外気温度により、冷房運転モードまたは暖房運転モードを選択し、圧縮機の運転を開始して冷媒を前記室内機に供給した後、室外機側の冷媒温度と室内機側の冷媒温度を検出して比較し、その比較結果が所定の温度差以下となったとき、同室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにしたことを特徴とする空気調和機の冷媒系統アドレス設定方法。An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line,
The outdoor control means of the outdoor unit selects the cooling operation mode or the heating operation mode according to the outside air temperature detected by the temperature sensor, starts the operation of the compressor and supplies the refrigerant to the indoor unit. The refrigerant temperature and the indoor unit refrigerant temperature are detected and compared, and when the comparison result is equal to or less than a predetermined temperature difference, it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and A refrigerant system address setting method for an air conditioner, characterized in that a refrigerant system address is set for an indoor unit determined to correspond to a refrigerant system of an outdoor unit. 前記圧縮機の運転を開始して冷媒を前記室内機に供給した後、室外機側の冷媒温度と室内機側の冷媒温度を検出して比較し、その比較結果が所定の温度差以下となり、その後、前記圧縮機の運転を停止して前記室内機への冷媒の供給を止め、前記室内熱交換器への吸込み空気の温度（吸込み温度）と室内熱交換器の冷媒流出側の温度（冷媒流出温度）を検出して比較し、その比較結果が所定の温度差以下となったとき、同室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにしたことを特徴とする請求項１記載の空気調和機の冷媒系統アドレス設定方法。After starting the operation of the compressor and supplying the refrigerant to the indoor unit, the refrigerant temperature on the outdoor unit side and the refrigerant temperature on the indoor unit side are detected and compared, and the comparison result is a predetermined temperature difference or less, Thereafter, the operation of the compressor is stopped to stop the supply of the refrigerant to the indoor unit, and the temperature of the intake air to the indoor heat exchanger (intake temperature) and the temperature of the refrigerant outflow side of the indoor heat exchanger (refrigerant) When the comparison result is equal to or less than a predetermined temperature difference, it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and the refrigerant system of the outdoor unit is The refrigerant system address setting method for an air conditioner according to claim 1, wherein a refrigerant system address is set for an indoor unit determined to be compatible. 前記室外制御手段が冷房運転モードを選択した時は、前記室内機側の冷媒温度を、室内熱交換器の冷媒流入側の温度（冷房時冷媒流入温度）とし、前記室外機側の冷媒温度を前記圧縮機の吸込側の冷媒温度（低圧飽和温度）としたことを特徴とする請求項１または請求項２記載の空気調和機の冷媒系統アドレス設定方法。When the outdoor control means selects the cooling operation mode, the refrigerant temperature on the indoor unit side is set to the refrigerant inflow side temperature of the indoor heat exchanger (cooling refrigerant inflow temperature), and the refrigerant temperature on the outdoor unit side is set to The refrigerant system address setting method for an air conditioner according to claim 1 or 2, wherein the refrigerant temperature (low pressure saturation temperature) on the suction side of the compressor is used. 前記室外制御手段が暖房運転モードを選択した時は、前記室内機側の冷媒温度を、室内熱交換器の冷媒流出側の温度（暖房時冷媒流出温度）とし、前記室外機側の冷媒温度を前記圧縮機の吐出側の冷媒温度（高圧吐出温度）としたことを特徴とする請求項１または請求項２記載の空気調和機の冷媒系統アドレス設定方法。When the outdoor control means selects the heating operation mode, the refrigerant temperature on the indoor unit side is set as the refrigerant outflow side temperature of the indoor heat exchanger (heating outflow refrigerant temperature), and the refrigerant temperature on the outdoor unit side is The refrigerant system address setting method for an air conditioner according to claim 1 or 2, wherein the refrigerant temperature (high pressure discharge temperature) on the discharge side of the compressor is used. 圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて冷房運転モードを選択し、当該室外機及び前記室内機を冷房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流入温度（Ｔｉｎ）と前記低圧飽和温度（Ｔｅ）を検出して比較し、一定時間内に、その差（Ｔｉｎ−Ｔｅ）が所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）となった場合、その室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにしたことを特徴とする空気調和機の冷媒系統アドレス設定方法。An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line,
Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the cooling operation mode is selected based on the outside air temperature, the compressor is started to operate by setting the outdoor unit and the indoor unit to the cooling operation mode, and the refrigerant is supplied. If you started,
The refrigerant inflow temperature (Tin) during cooling of each indoor heat exchanger and the low-pressure saturation temperature (Te) are detected and compared, and the difference (Tin−Te) is a predetermined temperature difference (α) within a certain time. In other words, it is determined that the refrigerant system of the indoor unit that does not satisfy (Tin <Te + α) does not correspond to the refrigerant system of the outdoor unit, and within the predetermined time, a predetermined temperature difference (α) or less, that is, (Tin < Te + α), it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and the refrigerant system address is set for the indoor unit determined to correspond to the refrigerant system of the outdoor unit. A refrigerant system address setting method for an air conditioner, characterized in that: 圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて冷房運転モードを選択し、当該室外機及び前記室内機を冷房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流入温度（Ｔｉｎ）と前記低圧飽和温度（Ｔｅ）を検出して比較し、一定時間内に、その差（Ｔｉｎ−Ｔｅ）が所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、
一定時間経過後、前記圧縮機を停止し、前記一定時間内に、所定の温度差（α）以下、即ち（Ｔｉｎ＜Ｔｅ＋α）となった室内機の前記電子膨張弁を全閉すると共に、送風ファンを回転させた後、前記室内熱交換器に吸込まれる空気の吸込み温度（Ｔａ）と同室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）を検出して比較し、一定時間内に、その差（Ｔａ−Ｔｏｕｔ）が所定の温度差（β）以下、即ち（Ｔａ−Ｔｏｕｔ）＜（β）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（β）以下、即ち（Ｔａ−Ｔｏｕｔ）＜（β）となった室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにしたことを特徴とする空気調和機の冷媒系統アドレス設定方法。An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line,
Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the cooling operation mode is selected based on the outside air temperature, the compressor is started to operate by setting the outdoor unit and the indoor unit to the cooling operation mode, and the refrigerant is supplied. If you started,
The refrigerant inflow temperature (Tin) during cooling of each indoor heat exchanger and the low-pressure saturation temperature (Te) are detected and compared, and the difference (Tin−Te) is a predetermined temperature difference (α) within a certain time. In the following, it is determined that the refrigerant system of the indoor unit that did not become (Tin <Te + α) does not correspond to the refrigerant system of the outdoor unit,
After a certain period of time, the compressor is stopped, and the electronic expansion valve of the indoor unit that is equal to or smaller than a predetermined temperature difference (α), that is, (Tin <Te + α) within the certain period of time is fully closed, and air is blown. After rotating the fan, the air suction temperature (Ta) of air sucked into the indoor heat exchanger is detected and compared with the cooling outflow temperature (Tout) during cooling of the indoor heat exchanger, and within a certain time, It is determined that the refrigerant system of the indoor unit whose difference (Ta-Tout) is equal to or less than a predetermined temperature difference (β), that is, (Ta−Tout) <(β) does not correspond to the refrigerant system of the outdoor unit, It is determined that the refrigerant system of the indoor unit corresponding to the predetermined temperature difference (β) or less, that is, (Ta−Tout) <(β), corresponds to the refrigerant system of the outdoor unit within the predetermined time. Refrigerant system address for indoor unit determined to support refrigerant system Refrigerant system address setting method of an air conditioner which is characterized in that so as to set. 圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて暖房運転モードを選択し、当該室外機及び前記室内機を暖房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）と前記高圧吐出温度（Ｔｃ）を検出して比較し、一定時間内に、その差（Ｔｃ−Ｔｏｕｔ）が所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）となった場合、その室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにしたことを特徴とする空気調和機の冷媒系統アドレス設定方法。An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line,
Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the heating operation mode is selected based on the outside air temperature, the compressor is started to operate with the outdoor unit and the indoor unit being in the heating operation mode, and the refrigerant is supplied. If you started,
The refrigerant outflow temperature during cooling (Tout) and the high-pressure discharge temperature (Tc) of each indoor heat exchanger are detected and compared, and the difference (Tc−Tout) within a predetermined time becomes a predetermined temperature difference (α ′ ), That is, it is determined that the refrigerant system of the indoor unit that did not satisfy (Tc <Tout + α ′) does not correspond to the refrigerant system of the outdoor unit, and within the predetermined time, When (Tc <Tout + α ′), it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, and the refrigerant system address for the indoor unit determined to correspond to the refrigerant system of the outdoor unit A refrigerant system address setting method for an air conditioner, wherein: 圧縮機、室外熱交換器、四方弁、温度センサ及び室外制御手段を備える室外機に、電子膨張弁、室内熱交換器、送風ファン、温度センサ及び室内制御手段とを備える室内機を接続して同一冷媒系統を構成する分離型の空気調和機を複数配設し、前記各室外制御手段及び室内制御手段に接続される信号線を同一の通信線を介して接続してなる空気調和システムにおいて、
前記室外機の任意の１台の室外制御手段は、同室外制御手段に組み込まれる冷媒系統判定プログラムが起動されると、前記空気調和システムを構成する全ての室外機及び室内機の運転を停止させた後、当該室外機の外気温度を検出し、同外気温度に基づいて暖房運転モードを選択し、当該室外機及び前記室内機を暖房運転モードとして圧縮機の運転を開始して冷媒の供給を開始した場合は、
前記各室内熱交換器の冷房時冷媒流出温度（Ｔｏｕｔ）と前記高圧吐出温度（Ｔｃ）を検出して比較し、一定時間内に、その差（Ｔｃ−Ｔｏｕｔ）が所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、
一定時間経過後、前記圧縮機を停止し、前記一定時間内に、所定の温度差（α’）以下、即ち（Ｔｃ＜Ｔｏｕｔ＋α’）となった室内機の前記電子膨張弁を全閉すると共に、送風ファンを回転させた後、前記室内熱交換器に吸込まれる空気の吸込み温度（Ｔａ）と同室内熱交換器の暖房時冷媒流出温度（Ｔｏｕｔ）を検出して比較し、一定時間内に、その差（Ｔｏｕｔ−Ｔａ）が所定の温度差（β’）以下、即ち（Ｔｏｕｔ−Ｔａ）＜（β’）とならなかった室内機の冷媒系統が前記室外機の冷媒系統に対応しないと判定し、前記一定時間内に、所定の温度差（β）以下、即ち（Ｔｏｕｔ−Ｔａ）＜（β’）となった室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定し、同室外機の冷媒系統に対応すると判定された室内機に対して冷媒系統アドレスを設定するようにしたことを特徴とする空気調和機の冷媒系統アドレス設定方法。An indoor unit including an electronic expansion valve, an indoor heat exchanger, a blower fan, a temperature sensor, and an indoor control unit is connected to the outdoor unit including a compressor, an outdoor heat exchanger, a four-way valve, a temperature sensor, and an outdoor control unit. In an air conditioner system in which a plurality of separation-type air conditioners constituting the same refrigerant system are arranged and signal lines connected to the outdoor control means and the indoor control means are connected via the same communication line,
Any one outdoor control unit of the outdoor unit stops the operation of all outdoor units and indoor units constituting the air conditioning system when a refrigerant system determination program incorporated in the outdoor control unit is activated. After that, the outside air temperature of the outdoor unit is detected, the heating operation mode is selected based on the outside air temperature, the compressor is started to operate with the outdoor unit and the indoor unit being in the heating operation mode, and the refrigerant is supplied. If you started,
The refrigerant outflow temperature during cooling (Tout) and the high-pressure discharge temperature (Tc) of each indoor heat exchanger are detected and compared, and the difference (Tc−Tout) within a predetermined time becomes a predetermined temperature difference (α ′ ) It is determined that the refrigerant system of the indoor unit that did not satisfy (Tc <Tout + α ′) does not correspond to the refrigerant system of the outdoor unit,
After a predetermined time has elapsed, the compressor is stopped, and the electronic expansion valve of the indoor unit that is equal to or smaller than a predetermined temperature difference (α ′), that is, (Tc <Tout + α ′) within the predetermined time is fully closed. Then, after rotating the blower fan, the suction temperature (Ta) of the air sucked into the indoor heat exchanger is detected and compared with the refrigerant outlet temperature (Tout) during heating of the indoor heat exchanger, and within a certain time Furthermore, the refrigerant system of the indoor unit in which the difference (Tout−Ta) is not more than the predetermined temperature difference (β ′), that is, (Tout−Ta) <(β ′) does not correspond to the refrigerant system of the outdoor unit. It is determined that the refrigerant system of the indoor unit in which the predetermined temperature difference (β) or less, that is, (Tout−Ta) <(β ′), corresponds to the refrigerant system of the outdoor unit within the predetermined time. For the indoor units that are determined to correspond to the refrigerant system of the outdoor unit, Refrigerant system address setting method of an air conditioner which is characterized in that so as to set the address. 前記室内機には、例えばマイコンのＩＤのようにそれぞれ異なるＩＤを含むノード情報が予め記憶されており、前記室内機の冷媒系統が前記室外機の冷媒系統に対応すると判定された場合、同室内機の室内制御手段より当該室外機の室外制御手段に対して前記ノード情報を送信し、同室外制御手段が同ノード情報を基に、同室内機の冷媒系統アドレスを順次割り当てるようにしたことを特徴とする請求項１、請求項２、請求項５、請求項６、請求項７又は請求項８記載の空気調和機の冷媒系統アドレス設定方法。Node information including different IDs such as microcomputer IDs is stored in advance in the indoor unit, and when it is determined that the refrigerant system of the indoor unit corresponds to the refrigerant system of the outdoor unit, The node information is transmitted from the indoor control means of the unit to the outdoor control means of the outdoor unit, and the outdoor control means sequentially assigns the refrigerant system address of the indoor unit based on the node information. The refrigerant system address setting method for an air conditioner according to claim 1, 2, 2, 5, 6, 7 or 8.
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