JP4193078B2

JP4193078B2 - Air conditioner control device

Info

Publication number: JP4193078B2
Application number: JP16687698A
Authority: JP
Inventors: 琢也井上
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1998-06-15
Filing date: 1998-06-15
Publication date: 2008-12-10
Anticipated expiration: 2018-06-15
Also published as: JP2000002188A

Description

【０００１】
【発明の属する技術分野】
本発明は、空気調和機の制御装置に係り、特に、圧縮機吐出側の高圧圧力が異常となったときに圧縮機を安全かつ確実に停止させる制御方式に関するものである。
【０００２】
【従来の技術】
インバータにより圧縮機を駆動する空気調和機では、何らかの異常状態が発生すると、圧縮機吐出側冷媒の高圧圧力が異常に上昇してしまうおそれがある。
そこで、このような課題を解決するために、例えば図１４に示したような空気調和機（三菱電機製で型式ＰＵＲＹ−２５０Ｍ−Ａ）の制御装置が開発されている。
図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続する冷媒配管、８は３相入力交流電源を直流に整流する順変換手段、９は順変換手段８からの出力電圧を交流に変換する逆変換手段、１０は逆変換手段９に可変電圧および可変周波数に係る指令信号を出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する高圧圧力検出手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２０はソフトウェア処理にて逆変換手段９への制御信号を演算し出力するマイコン、２１は３相入力交流電源である。
【０００３】
上記した構成の従来装置においては、高圧圧力検出手段１１からの圧力信号をマイコン２０に入力している間に圧縮機３吐出側の高圧圧力が異常と考えられる所定値以上となったとき、マイコン２０内でソフトウェアの機能により高圧圧力の異常状態を判定し、逆変換器制御手段１０からの制御信号出力をソフトウェア処理によって停止させる。これにより、逆変換手段９への出力が停止され、その結果、圧縮機３を停止させるようになっている。
【０００４】
【発明が解決しようとする課題】
従来の空気調和機の制御装置は上記のように構成されているので、以下のような課題が内在していた。
すなわち、高圧圧力異常状態の判定処理およびインバータ制御信号の出力停止処理がマイコン２０内のソフトウェアの機能によって行われていたため、外来ノイズなどの影響により、高圧圧力検出手段１１やマイコン２０自体の誤動作による圧縮機３の誤停止、あるいは停止遅れなどを生じるおそれがあった。
【０００５】
【課題を解決するための手段】
本発明は以上のような従来技術の課題を解決するためになされたものであって、３相入力交流電源を直流に整流する順変換手段と、順変換手段からの出力電源を交流に変換する逆変換手段と、制御信号出力手段を有しこの制御信号出力手段からの可変電圧および可変周波数に係る指令信号を増幅器で増幅して逆変換手段に出力する逆変換器制御手段とを有する電源供給回路を備えているとともに、空気調和機に配備された冷媒回路の圧縮機吐出側の高圧圧力検出手段で検出された冷媒の高圧圧力に基づいて、電源供給回路により圧縮機を駆動制御する制御装置において、増幅器を出力遮断機能付き電流増幅手段で構成し、高圧圧力検出手段で検出された冷媒の高圧圧力が高圧異常状態に係る所定値を超えたとき、出力遮断機能付き電流増幅手段により制御信号出力手段からの指令信号を遮断して圧縮機への電源供給を停止させるようにしたものである。
【０００８】
【発明の実施の形態】
発明の実施の形態１．
図１は本発明の請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は３相入力交流電源２１と順変換手段８の間に設けた開閉手段、１３は開閉手段１２の３個の内いずれか２個に並列に設けた突入電流防止手段、１６は例えばマイコンなどから成る制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
ここで、前記の突入電流防止手段１３は電源投入時に平滑手段１７への充電電流を制限するようになっている。また、開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構を採用してあり、３相入力交流電源２１からの電源線３本に対しそれぞれ１個づつの計３個が配備されている。また、高圧圧力検出手段１１からの駆動用電源線が各開閉手段１２にそれぞれ接続されている。
【０００９】
この実施形態１の制御装置では、圧縮機３吐出側の高圧圧力が異常状態に係る所定値（圧力スイッチ用として予め高圧圧力検出手段１１に機械的に設定されている値。以下の各実施形態においても同じ）以上となったとき、高圧圧力検出手段１１からの駆動電源が開閉手段１２に供給されて開閉手段１２を開路させることにより、当該制御装置へ電源を供給する電源供給回路２２内のある構成部分を機械的に遮断する。これにより、逆変換手段９への出力が停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００１０】
すなわち、この制御方式によれば、順変換手段８と逆変換手段９の間に平滑手段１７を設けた装置において必要であった、開閉手段１２と突入電流防止手段１３による突入電流防止回路を利用することで、目的を達成できたのである。
【００１１】
発明の実施の形態２．
図２は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は３相入力交流電源２１と順変換手段８間の電源線３本に対し計２個設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は２個の開閉手段１２にそれぞれ並列に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の各開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用電源線が各開閉手段１２にそれぞれ接続されている。
【００１２】
この実施形態２の制御装置では、高圧圧力が所定値以上となったとき高圧圧力検出手段１１からの駆動電源が開閉手段１２に供給されて開閉手段１２を開路させることにより、当該制御装置への電源供給が機械的に遮断される。これにより、逆変換手段９への出力が停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００１３】
すなわち、この制御方式によれば、順変換手段８と逆変換手段９の間に平滑手段１７を設けた機器で必要だった、開閉手段１２と突入電流防止手段１３による突入電流防止回路を利用することで、目的を達成できた。
また、実施形態１と比べて、開閉手段１２を３個から２個に減らすことができるので、コストダウンおよび装置内の省スペース化を実現できる。
【００１４】
発明の実施の形態３．
図３は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は３相入力交流電源２１と順変換手段８間の電源線３本に対し１個設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は開閉手段１２の２個の内いずれか１個に並列に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の各開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用電源線が各開閉手段１２に接続されている。
【００１５】
この実施形態３の制御装置では、高圧圧力が所定値以上となったとき高圧圧力検出手段１１からの駆動電源が開閉手段１２に供給されて開閉手段１２を開路させることにより、当該制御装置への電源供給が機械的に遮断される。従って、逆変換手段９への出力が停止されるので、圧縮機３を安全かつ確実に停止させることができる。
【００１６】
すなわち、この制御方式によれば、順変換手段８と逆変換手段９の間に平滑手段１７を設けた機器で必要だった、開閉手段１２と突入電流防止手段１３による突入電流防止回路を利用することで、目的を達成できた。
また、実施形態１と比べて、開閉手段１２を３個に対し２個、突入電流防止手段１３が２個に対し１個と減らすことができるので、更にコストダウン、省スペース化を実現できる。
【００１７】
発明の実施の形態４．
図４は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は順変換手段８と平滑手段１７の間に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は開閉手段１２と並列に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用電源線が各開閉手段１２に接続されている。
【００１８】
この実施形態４の制御装置では、高圧圧力が所定値以上となったときに高圧圧力検出手段１１からの駆動電源が開閉手段１２に供給されて開閉手段１２を開路させることにより、逆変換手段９への入力が遮断される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００１９】
すなわち、この制御方式によれば、順変換手段８と逆変換手段９の間に平滑手段１７を設けた機器で必要だった、開閉手段１２と突入電流防止手段１３による突入電流防止回路を利用することで、目的を達成できた。
また、実施形態１と比べて、開閉手段１２が３個に対し１個、突入電流防止手段１３が２個に対し１個と減らすことができるので、より一層のコストダウン、省スペース化が実現できる。
【００２０】
発明の実施の形態５．
図５は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は逆変換手段９と圧縮機３間の電源線３本に対しそれぞれ１個づつ計３個で配備された開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の各開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用電源線が前記の各開閉手段１２にそれぞれ接続されている。
【００２１】
この実施形態５の制御装置によれば、高圧圧力が所定値以上となったときに高圧圧力検出手段１１からの駆動電源が開閉手段１２に供給されて開閉手段１２を開路させることにより、圧縮機３への電源入力が遮断される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００２２】
発明の実施の形態６．
図６は請求項２に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１６は制御信号出力手段、１４は逆変換器制御手段１０内の制御信号出力手段１６とフォトカプラ２３の間に設けた出力遮断機能付き電流増幅手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の出力遮断機能付き電流増幅手段１４は、動作特性、部品寿命、耐久性に優れた信頼性の高い電気部品から成っている。また、高圧圧力検出手段１１からの駆動用信号線（制御機器を保護するための低電圧の電源を供給するもの。以下同じ）が出力遮断機能付き電流増幅手段１４に接続されている。
【００２３】
この実施形態６の制御装置によれば、高圧圧力検出手段１１で検出された冷媒の高圧圧力が高圧異常状態に係る所定値を超えたとき高圧圧力検出手段１１からのリセット信号が出力遮断機能付き電流増幅手段１４へ入力されることにより、出力遮断機能付き電流増幅手段１４が制御信号出力手段１６からフォトカプラ２３への指令信号を遮断する。従って、圧縮機３への電源供給が停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００２４】
発明の実施の形態７．
図７は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は逆変換器制御手段１０内の制御用電源２４とフォトカプラ２３の間に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用信号線が開閉手段１２に接続されている。
【００２５】
この実施形態７の制御装置によれば、高圧圧力が所定値以上となったときに高圧圧力検出手段１１からの駆動信号が開閉手段１２に入力されて開閉手段１２を開路させることにより、制御信号出力手段１６からの制御信号の出力が遮断される。これにより、逆変換手段９への出力を停止させることができる。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００２６】
発明の実施の形態８．
図８は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は逆変換器制御手段１０内におけるフォトカプラ２３の発光素子と並列に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用信号線が開閉手段１２に接続されている。
【００２７】
この実施形態８の制御装置によれば、高圧圧力が所定値以上となったとき高圧圧力検出手段１１からの駆動信号が開閉手段１２に入力されて開閉手段１２を閉路させることにより、フォトカプラ２３への電流をバイパスさせて制御信号出力手段１６からの制御信号の出力を遮断することができる。これにより、逆変換手段９への出力を停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００２８】
発明の実施の形態９．
図９は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は逆変換器制御手段１０内におけるフォトカプラ２３の発光素子とマイコン２５の間に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用信号線が開閉手段１２に接続されている。
【００２９】
この実施形態９の制御装置によれば、高圧圧力が所定値以上となったときに高圧圧力検出手段１１からの駆動信号が開閉手段１２に入力されて開閉手段１２を開路させることにより、制御信号出力手段１６からの制御信号出力が遮断される。これにより、逆変換手段９への出力を停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００３０】
発明の実施の形態１０．
図１０は請求項３に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は３相入力交流電源２１と順変換手段８の間に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、１８は逆変換器制御手段１０内に設けたリセット機能付き制御信号出力手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記のリセット機能付き制御信号出力手段１８は動作特性、部品寿命、耐久性に優れた信頼性の高いものである。また、高圧圧力検出手段１１からの駆動用信号線がリセット機能付き制御信号出力手段１８に接続されている。
【００３１】
この実施形態１０の制御装置において、高圧圧力検出手段１１で検出された冷媒の高圧圧力が高圧異常状態に係る所定値を超えたとき高圧圧力検出手段１１からのリセット信号が入力されることにより、リセット機能付き制御信号出力手段１８は自身の指令信号出力を停止する。これによって、逆変換手段９への出力が停止される。その結果、圧縮機３を安全かつ確実に、加えてリセット可能に停止させることができる。そうして、リセット操作後に圧縮機３を再起動させて正常であれば、運転を続行させることもできる。
【００３２】
発明の実施の形態１１．
図１１は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は逆変換器制御手段１０内におけるトランジスタ２６，２７と逆変換手段９内におけるトランジスタ・ダイオードセット２９とを結ぶ信号配線と接地２８の間に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用信号線が開閉手段１２に接続されている。
【００３３】
この実施形態１１の制御装置によれば、高圧圧力が所定値以上となったとき高圧圧力検出手段１１からの駆動信号が開閉手段１２に入力されて開閉手段１２を閉路させることにより、逆変換器制御手段１０からの制御信号出力が遮断される。これにより、逆変換手段９への出力が停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００３４】
発明の実施の形態１２．
図１２は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は逆変換器制御手段１０内において逆変換手段９と接続された２本の信号配線間に並列に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は順変換手段８と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用信号線が開閉手段１２に接続されている。
【００３５】
この実施形態１２の制御装置によれば、高圧圧力が所定値以上となったとき高圧圧力検出手段１１からの駆動信号が開閉手段１２に入力されて開閉手段１２を閉路させることにより、逆変換器制御手段１０からの制御信号出力が遮断される。従って、逆変換手段９への出力が停止される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００３６】
発明の実施の形態１３．
図１３は請求項１に対応する空気調和機の制御装置の回路ブロック図である。図において、１は室外機、２は室内機、３は圧縮機、４は室外機熱交換器、５は室内機熱交換器、６は絞り装置、７は室外機１と室内機２を接続して冷媒回路を成す冷媒配管、８は３相入力交流電源２１を直流に整流する順変換手段、９は順変換手段８からの出力電源を交流に変換する逆変換手段、１０は可変電圧および可変周波数に係る指令信号を逆変換手段９へ出力する逆変換器制御手段、１１は圧縮機１吐出側の高圧圧力を検出する圧力スイッチ式の高圧圧力検出手段、１２は３相入力交流電源２１と順変換手段８の間に設けた開閉手段、１６は制御信号出力手段、１７は順変換手段８からの脈動を含んだ電圧波形を平坦な直流電圧に変換する平滑手段、１３は平滑手段１７と逆変換手段９の間に設けられ電源投入時に平滑手段１７への充電電流を制限する突入電流防止手段、２２は順変換手段８と逆変換手段９と逆変換器制御手段１０などから成る電源供給回路である。
前記の開閉手段１２は、動作特性、部品寿命、耐久性に優れた信頼性の高い機械式の開閉機構から成っている。また、高圧圧力検出手段１１からの駆動用電源線が開閉手段１２に接続されている。
【００３７】
この実施形態１３の制御装置によれば、高圧圧力が所定値以上となったとき高圧圧力検出手段１１からの駆動信号が開閉手段１２に供給されて開閉手段１２を開路させることにより、逆変換手段９への電源入力が遮断される。その結果、圧縮機３を安全かつ確実に停止させることができる。
【００３８】
【発明の効果】
以上詳述した通り、本発明は以下のような効果を奏する。
本発明によれば、圧縮機吐出側の冷媒の高圧圧力が異常状態になったとき、出力遮断機能付き電流増幅手段により制御信号出力手段からの指令信号を遮断して圧縮機への電源供給を停止させるようにしてあるから、圧縮機を安全、かつ、確実に停止することができる。
【００３９】
更に、本発明によれば、圧縮機吐出側の冷媒の高圧圧力が異常状態になったとき、リセット機能付き制御信号出力手段により制御信号出力手段からの指令信号を遮断して圧縮機への電源供給をリセット可能に停止させるようにしてあるので、圧縮機を安全、かつ、確実に停止することができる。そうして、リセット操作後に再起動させて正常であれば、運転を続行させることも可能である。
【図面の簡単な説明】
【図１】本発明における実施の形態１の構成図である。
【図２】本発明における実施の形態２の構成図である。
【図３】本発明における実施の形態３の構成図である。
【図４】本発明における実施の形態４の構成図である。
【図５】本発明における実施の形態５の構成図である。
【図６】本発明における実施の形態６の構成図である。
【図７】本発明における実施の形態７の構成図である。
【図８】本発明における実施の形態８の構成図である。
【図９】本発明における実施の形態９の構成図である。
【図１０】本発明における実施の形態１０の構成図である。
【図１１】本発明における実施の形態１１の構成図である。
【図１２】本発明における実施の形態１２の構成図である。
【図１３】本発明における実施の形態１３の構成図である。
【図１４】従来例の構成図である。
【符号の説明】
３圧縮機、８順変換手段、９逆変換手段、１０逆変換器制御手段、１１高圧圧力検出手段、１２開閉手段、１４出力遮断機能付き電流増幅手段、１６制御信号出力手段、１８リセット機能付き制御信号出力手段、２１３相入力交流電源、２２電源供給回路。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for an air conditioner, and more particularly to a control method for safely and reliably stopping a compressor when a high pressure on the discharge side of the compressor becomes abnormal.
[0002]
[Prior art]
In an air conditioner that drives a compressor by an inverter, if any abnormal state occurs, there is a risk that the high-pressure pressure of the compressor discharge-side refrigerant will rise abnormally.
In order to solve such a problem, for example, a control device for an air conditioner (manufactured by Mitsubishi Electric, model PURY-250M-A) as shown in FIG. 14 has been developed.
In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. Refrigerant piping to be used, 8 is a forward conversion means for rectifying the three-phase input AC power source into direct current, 9 is an inverse conversion means for converting the output voltage from the forward conversion means 8 into alternating current, 10 is a variable voltage and variable for the reverse conversion means 9 Inverter control means for outputting a command signal related to the frequency, 11 is a high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 17 is a flat DC voltage waveform including pulsations from the forward converting means 8. Smoothing means for converting to voltage, 13 is an inrush current preventing means for limiting the charging current to the smoothing means 17 when the power is turned on, 20 is a microcomputer that calculates and outputs a control signal to the inverse converting means 9 by software processing, and 21 is This is a three-phase input AC power source.
[0003]
In the conventional apparatus having the above-described configuration, when the high-pressure pressure on the discharge side of the compressor 3 exceeds a predetermined value considered to be abnormal while the pressure signal from the high-pressure detection means 11 is being input to the microcomputer 20, the microcomputer The abnormal state of the high pressure is determined by a software function within 20, and the control signal output from the inverse converter control means 10 is stopped by software processing. Thereby, the output to the reverse conversion means 9 is stopped, and as a result, the compressor 3 is stopped.
[0004]
[Problems to be solved by the invention]
Since the conventional control device for an air conditioner is configured as described above, the following problems are inherent.
That is, since the determination process of the high pressure abnormal state and the output stop process of the inverter control signal are performed by the software function in the microcomputer 20, due to the influence of external noise or the like, the high pressure detection means 11 or the microcomputer 20 itself malfunctions. There is a possibility that the compressor 3 may be erroneously stopped or delayed.
[0005]
[Means for Solving the Problems]
  The present invention has been made in order to solve the above-described problems of the prior art, and converts forward conversion means for rectifying a three-phase input AC power source into direct current and output power from the forward conversion means into alternating current. Inverse transformation means;Having control signal output means from the control signal output meansCommand signal for variable voltage and variable frequencyAmplify with amplifierA high-pressure pressure of the refrigerant detected by the high-pressure detection means on the compressor discharge side of the refrigerant circuit provided in the air conditioner, and having a power supply circuit having an inverse converter control means for outputting to the reverse conversion means In the control device for driving and controlling the compressor by the power supply circuit,Configure the amplifier with current amplification means with output cutoff function,When the high pressure of the refrigerant detected by the high pressure detection means exceeds a predetermined value related to the high pressure abnormal state,Cut off the command signal from the control signal output means by the current amplification means with output cutoff functionStop supplying power to the compressorIt is what I did.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 of the Invention
FIG. 1 is a circuit block diagram of an air conditioner control device corresponding to claim 1 of the present invention. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal relating to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 12 is a three-phase input AC power source 21. Open / close means provided between the forward conversion means 8, 13 is an inrush current preventing means provided in parallel with any two of the three open / close means 12, 16 is a control signal output means comprising, for example, a microcomputer, 17 The voltage waveform including the pulsation from the forward conversion means 8 is flattened. Smoothing means for converting the voltage, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
Here, the inrush current preventing means 13 limits the charging current to the smoothing means 17 when the power is turned on. In addition, the switching means 12 employs a reliable mechanical switching mechanism that is excellent in operating characteristics, component life, and durability, one for each of the three power lines from the three-phase input AC power source 21. A total of three are deployed. Further, a driving power supply line from the high pressure detecting means 11 is connected to each opening / closing means 12.
[0009]
In the control device of the first embodiment, the high pressure on the discharge side of the compressor 3 is a predetermined value related to an abnormal state (a value that is mechanically set in the high pressure detection means 11 in advance for the pressure switch. Each embodiment below) In the power supply circuit 22 for supplying power to the control device, the drive power from the high pressure detecting means 11 is supplied to the opening / closing means 12 and the opening / closing means 12 is opened. Mechanically shuts off certain components. Thereby, the output to the reverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0010]
That is, according to this control method, an inrush current prevention circuit using the opening / closing means 12 and the inrush current prevention means 13 which is necessary in the apparatus in which the smoothing means 17 is provided between the forward conversion means 8 and the reverse conversion means 9 is used. By doing so, the goal was achieved.
[0011]
Embodiment 2 of the Invention
FIG. 2 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal relating to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 12 is a three-phase input AC power source 21. 2 for a total of two power lines between the power conversion line 8 and the forward conversion means 8, 16 for the control signal output means, 17 for converting the voltage waveform including the pulsation from the forward conversion means 8 into a flat DC voltage. The smoothing means 13 is provided in parallel with each of the two opening / closing means 12 and is a power source. Rush current prevention means for limiting the charging current to the smoothing means 17 to Nyutoki, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
Each of the opening / closing means 12 is composed of a reliable mechanical opening / closing mechanism excellent in operating characteristics, component life and durability. Further, a driving power supply line from the high pressure detecting means 11 is connected to each opening / closing means 12.
[0012]
In the control device according to the second embodiment, when the high pressure exceeds a predetermined value, the driving power from the high pressure detection means 11 is supplied to the opening / closing means 12 to open the opening / closing means 12, thereby opening the opening / closing means 12. The power supply is mechanically interrupted. Thereby, the output to the reverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0013]
That is, according to this control method, an inrush current prevention circuit using the opening / closing means 12 and the inrush current prevention means 13 which is necessary for a device provided with the smoothing means 17 between the forward conversion means 8 and the reverse conversion means 9 is used. The goal was achieved.
Further, since the number of opening / closing means 12 can be reduced from three to two as compared with the first embodiment, cost reduction and space saving in the apparatus can be realized.
[0014]
Embodiment 3 of the Invention
FIG. 3 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal relating to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 12 is a three-phase input AC power source 21. One open / close means provided for three power lines between the forward conversion means 8 and 16, a control signal output means 16, and a smoothing 17 for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage. The means 13 is provided in parallel with any one of the two opening / closing means 12. Power rush current prevention means for limiting the charging current to-on the smoothing means 17, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
Each of the opening / closing means 12 is composed of a reliable mechanical opening / closing mechanism excellent in operating characteristics, component life and durability. A driving power line from the high pressure detecting means 11 is connected to each opening / closing means 12.
[0015]
In the control device of the third embodiment, when the high pressure exceeds a predetermined value, the drive power from the high pressure detection means 11 is supplied to the opening / closing means 12 and the opening / closing means 12 is opened, so that The power supply is mechanically interrupted. Therefore, since the output to the reverse conversion means 9 is stopped, the compressor 3 can be stopped safely and reliably.
[0016]
That is, according to this control method, an inrush current prevention circuit using the opening / closing means 12 and the inrush current prevention means 13 which is necessary for a device provided with the smoothing means 17 between the forward conversion means 8 and the reverse conversion means 9 is used. The goal was achieved.
Further, compared with the first embodiment, the number of opening / closing means 12 can be reduced to two for three and the number of inrush current preventing means 13 can be reduced to one for two, so further cost reduction and space saving can be realized.
[0017]
Embodiment 4 of the Invention
FIG. 4 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, and 12 is a smoothing function with the forward conversion means 8. Opening / closing means provided between the means 17, 16 is a control signal output means, 17 is a smoothing means for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage, and 13 is in parallel with the opening / closing means 12. Provided to limit the charging current to the smoothing means 17 when the power is turned on Input current preventing means, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
The opening / closing means 12 is composed of a reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. A driving power line from the high pressure detecting means 11 is connected to each opening / closing means 12.
[0018]
In the control device of the fourth embodiment, when the high pressure exceeds a predetermined value, the drive power from the high pressure detection means 11 is supplied to the opening / closing means 12 to open the opening / closing means 12, thereby opening the reverse conversion means 9. Input to is blocked. As a result, the compressor 3 can be stopped safely and reliably.
[0019]
That is, according to this control method, an inrush current prevention circuit using the opening / closing means 12 and the inrush current prevention means 13 which is necessary for a device provided with the smoothing means 17 between the forward conversion means 8 and the reverse conversion means 9 is used. The goal was achieved.
Further, compared with the first embodiment, the number of opening / closing means 12 can be reduced to one for three and the number of inrush current preventing means 13 can be reduced to one for two, thereby realizing further cost reduction and space saving. it can.
[0020]
Embodiment 5 of the Invention
FIG. 5 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 12 is the inverse conversion means 9 and the compression Opening and closing means provided with three power lines for each of the three power lines between the machines 3, 16 is a control signal output means, 17 is a flat direct current voltage waveform including pulsations from the forward conversion means 8. The smoothing means 13 for converting into a forward conversion means 8 and an inverse conversion means 9 is provided. Re rush current prevention means for limiting the charging current to the power-on to the smoothing means 17, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
Each of the opening / closing means 12 is composed of a reliable mechanical opening / closing mechanism excellent in operating characteristics, component life and durability. Further, a driving power line from the high pressure detecting means 11 is connected to each of the opening / closing means 12.
[0021]
According to the control device of the fifth embodiment, when the high pressure exceeds a predetermined value, the driving power from the high pressure detecting means 11 is supplied to the opening / closing means 12 and the opening / closing means 12 is opened, whereby the compressor The power input to 3 is cut off. As a result, the compressor 3 can be stopped safely and reliably.
[0022]
Embodiment 6 of the Invention
FIG. 6 is a circuit block diagram of an air conditioner control device corresponding to claim 2. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, 16 is a control signal output means, 14 Is a current amplifying means with an output cutoff function provided between the control signal output means 16 and the photocoupler 23 in the inverse converter control means 10, and 17 is a flat direct current voltage waveform including a pulsation from the forward conversion means 8. The smoothing means for converting to 13 An inrush current preventing means 22 provided between the means 9 for limiting the charging current to the smoothing means 17 when the power is turned on, 22 is a power supply circuit comprising the forward conversion means 8, the reverse conversion means 9, the reverse converter control means 10, and the like. is there.
The current amplifying means 14 with output cut-off function is composed of a highly reliable electrical component having excellent operating characteristics, component life, and durability. In addition, a driving signal line (which supplies a low voltage power source for protecting the control device; the same applies hereinafter) from the high pressure detecting means 11 is connected to the current amplifying means 14 with an output cutoff function.
[0023]
According to the control device of the sixth embodiment, when the high pressure of the refrigerant detected by the high pressure detecting means 11 exceeds a predetermined value related to the high pressure abnormal state, the reset signal from the high pressure detecting means 11 has an output cutoff function. By being input to the current amplifying means 14, the current amplifying means 14 with output cutoff function cuts off the command signal from the control signal output means 16 to the photocoupler 23. Accordingly, the power supply to the compressor 3 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0024]
Embodiment 7 of the Invention
FIG. 7 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, and 12 is an inverse converter control means 10. Open / close means provided between the control power supply 24 and the photocoupler 23, 16 is a control signal output means, 17 is a smoothing means for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage, A power supply 13 is provided between the forward conversion means 8 and the reverse conversion means 9. Rush current prevention means for limiting the charging current to the smoothing means 17 to Nyutoki, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
The opening / closing means 12 is composed of a reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. A driving signal line from the high pressure detecting means 11 is connected to the opening / closing means 12.
[0025]
According to the control device of the seventh embodiment, when the high pressure exceeds a predetermined value, the drive signal from the high pressure detection means 11 is input to the opening / closing means 12 and the opening / closing means 12 is opened, whereby the control signal The output of the control signal from the output means 16 is cut off. Thereby, the output to the reverse conversion means 9 can be stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0026]
Embodiment 8 of the Invention
FIG. 8 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, and 12 is an inverse converter control means 10. Opening / closing means provided in parallel with the light emitting element of the photocoupler 23, 16 is a control signal output means, 17 is a smoothing means for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage, and 13 is Between the forward conversion means 8 and the reverse conversion means 9; Rush current prevention means for limiting the charging current to the smoothing unit 17 when turned on, 22 denotes a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
The opening / closing means 12 comprises a highly reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. A driving signal line from the high pressure detecting means 11 is connected to the opening / closing means 12.
[0027]
According to the control device of the eighth embodiment, when the high pressure exceeds a predetermined value, the drive signal from the high pressure detecting means 11 is input to the opening / closing means 12 to close the opening / closing means 12, thereby causing the photocoupler 23. The output of the control signal from the control signal output means 16 can be blocked by bypassing the current to the control signal output means 16. Thereby, the output to the reverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0028]
Embodiment 9 of the Invention
FIG. 9 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, and 12 is an inverse converter control means 10. Opening / closing means provided between the light emitting element of the photocoupler 23 and the microcomputer 25, 16 is a control signal output means, 17 is a smoothing means for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage. 13 between the forward conversion means 8 and the reverse conversion means 9 Provided inrush current prevention means for limiting the charging current to the power-on to the smoothing means 17, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
The opening / closing means 12 is composed of a reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. A driving signal line from the high pressure detecting means 11 is connected to the opening / closing means 12.
[0029]
According to the control device of the ninth embodiment, when the high pressure exceeds a predetermined value, the drive signal from the high pressure detection means 11 is input to the opening / closing means 12 and the opening / closing means 12 is opened. The control signal output from the output means 16 is cut off. Thereby, the output to the reverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0030]
Embodiment 10 of the Invention
FIG. 10 is a circuit block diagram of an air conditioner control device corresponding to claim 3. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal relating to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 12 is a three-phase input AC power source 21. Open / close means provided between the forward conversion means 8, 16 is a control signal output means, 17 is a smoothing means for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage, and 13 is a forward conversion means. 8 and the reverse conversion means 9 provided to the smoothing means 17 when the power is turned on Inrush current prevention means for limiting the charging current, 18 is a control signal output means with a reset function provided in the inverse converter control means 10, and 22 is from the forward conversion means 8, the reverse conversion means 9, the inverse converter control means 10, etc. A power supply circuit.
The control signal output means 18 with a reset function is highly reliable with excellent operation characteristics, component life and durability. Further, the drive signal line from the high pressure detection means 11 is connected to the control signal output means 18 with a reset function.
[0031]
In the control device of the tenth embodiment, when the high pressure of the refrigerant detected by the high pressure detection unit 11 exceeds a predetermined value related to the high pressure abnormal state, a reset signal is input from the high pressure detection unit 11. The control signal output means 18 with a reset function stops its own command signal output. As a result, the output to the inverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably and resettable. If the compressor 3 is restarted after the reset operation and is normal, the operation can be continued.
[0032]
Embodiment 11 of the Invention
FIG. 11 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, and 12 is an inverse converter control means 10. Opening / closing means provided between the signal wiring connecting the transistors 26 and 27 in the inside and the transistor / diode set 29 in the reverse conversion means 9 and the ground 28, 16 is the control signal output means, 17 is the pulsation from the forward conversion means 8 Flattened voltage waveform including Smoothing means for converting to a DC voltage, 13 is provided between the forward conversion means 8 and the reverse conversion means 9 and restricts the charging current to the smoothing means 17 when the power is turned on, and 22 is reverse to the forward conversion means 8. It is a power supply circuit comprising a conversion means 9 and an inverse converter control means 10.
The opening / closing means 12 comprises a highly reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. A driving signal line from the high pressure detecting means 11 is connected to the opening / closing means 12.
[0033]
According to the control device of the eleventh embodiment, when the high pressure exceeds a predetermined value, the drive signal from the high pressure detecting means 11 is input to the opening / closing means 12 and the opening / closing means 12 is closed, whereby the inverse converter The control signal output from the control means 10 is cut off. Thereby, the output to the reverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0034]
Embodiment 12 of the Invention
FIG. 12 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal related to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detection means for detecting the high pressure on the discharge side of the compressor 1, and 12 is an inverse converter control means 10. Opening / closing means provided in parallel between two signal wirings connected to the reverse conversion means 9, 16 is a control signal output means, 17 is a voltage waveform including pulsations from the forward conversion means 8, and is a flat DC voltage. Smoothing means 13 for converting into forward conversion means 8 and reverse conversion means 9 Rush current prevention means for limiting the charging current to the power-on to the smoothing means 17 provided, 22 denotes a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
The opening / closing means 12 comprises a highly reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. A driving signal line from the high pressure detecting means 11 is connected to the opening / closing means 12.
[0035]
According to the control device of the twelfth embodiment, when the high pressure exceeds a predetermined value, the drive signal from the high pressure detecting means 11 is input to the opening / closing means 12 and the opening / closing means 12 is closed, whereby the inverse converter The control signal output from the control means 10 is cut off. Accordingly, the output to the inverse conversion means 9 is stopped. As a result, the compressor 3 can be stopped safely and reliably.
[0036]
Embodiment 13 of the Invention
FIG. 13 is a circuit block diagram of an air conditioner control device corresponding to claim 1. In the figure, 1 is an outdoor unit, 2 is an indoor unit, 3 is a compressor, 4 is an outdoor unit heat exchanger, 5 is an indoor unit heat exchanger, 6 is a throttle device, and 7 is connected to the outdoor unit 1 and the indoor unit 2. The refrigerant piping that forms the refrigerant circuit, 8 is the forward conversion means for rectifying the three-phase input AC power supply 21 into direct current, 9 is the reverse conversion means for converting the output power from the forward conversion means 8 to alternating current, 10 is a variable voltage and Inverter control means for outputting a command signal relating to the variable frequency to the inverse conversion means 9, 11 is a pressure switch type high pressure detecting means for detecting the high pressure on the discharge side of the compressor 1, and 12 is a three-phase input AC power source 21. Open / close means provided between the forward conversion means 8, 16 is a control signal output means, 17 is a smoothing means for converting a voltage waveform including pulsations from the forward conversion means 8 into a flat DC voltage, and 13 is a smoothing means 17. To the smoothing means 17 when the power is turned on. Rush current prevention means for limiting the charging current, 22 is a power supply circuit consisting of a forward transform unit 8 and the inverse transformation means 9 and the inverse transformer control unit 10.
The opening / closing means 12 comprises a highly reliable mechanical opening / closing mechanism having excellent operating characteristics, component life, and durability. Further, a driving power line from the high pressure detecting means 11 is connected to the opening / closing means 12.
[0037]
According to the control device of the thirteenth embodiment, when the high pressure exceeds a predetermined value, the drive signal from the high pressure detecting means 11 is supplied to the opening / closing means 12 and the opening / closing means 12 is opened, whereby the reverse conversion means. The power input to 9 is cut off. As a result, the compressor 3 can be stopped safely and reliably.
[0038]
【The invention's effect】
  As described above in detail, the present invention has the following effects.
  According to the present invention,When the high pressure of the refrigerant on the compressor discharge side becomes abnormal, the current amplification means with output cutoff function cuts off the command signal from the control signal output means and stops the power supply to the compressor. FromThe compressor can be stopped safely and reliably.
[0039]
  Furthermore,According to the present invention, when the high-pressure pressure of the refrigerant on the compressor discharge side becomes abnormal, the control signal output means with reset function cuts off the command signal from the control signal output means and supplies power to the compressor. Since the resetting is stopped, the compressor can be stopped safely and reliably. Then, if the operation is restarted after the reset operation and is normal, the operation can be continued.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a second embodiment according to the present invention.
FIG. 3 is a configuration diagram of Embodiment 3 according to the present invention.
FIG. 4 is a configuration diagram of a fourth embodiment according to the present invention.
FIG. 5 is a configuration diagram of a fifth embodiment of the present invention.
FIG. 6 is a configuration diagram of a sixth embodiment according to the present invention.
FIG. 7 is a configuration diagram of a seventh embodiment according to the present invention.
FIG. 8 is a configuration diagram of an eighth embodiment of the present invention.
FIG. 9 is a configuration diagram of Embodiment 9 according to the present invention.
FIG. 10 is a configuration diagram of a tenth embodiment of the present invention.
FIG. 11 is a configuration diagram of an eleventh embodiment of the present invention.
FIG. 12 is a configuration diagram of a twelfth embodiment of the present invention.
FIG. 13 is a configuration diagram of a thirteenth embodiment of the present invention.
FIG. 14 is a configuration diagram of a conventional example.
[Explanation of symbols]
3 compressor, 8 forward conversion means, 9 reverse conversion means, 10 reverse converter control means, 11 high pressure detection means, 12 switching means, 14 current amplification means with output cutoff function, 16 control signal output means, 18 with reset function Control signal output means, 21 three-phase input AC power supply, 22 power supply circuit.

Claims

Forward conversion means for rectifying the three-phase input AC power supply to direct current, reverse conversion means for converting the output power supply from the forward conversion means to alternating current, control signal output means, variable voltage from the control signal output means, and A compressor supply side of a refrigerant circuit provided in an air conditioner, and having a power supply circuit having an inverter control means for amplifying a command signal related to a variable frequency by an amplifier and outputting the signal to the inverter In the control device for driving and controlling the compressor by the power supply circuit based on the high pressure of the refrigerant detected by the high pressure detection means, the amplifier is constituted by a current amplifying means with an output cutoff function, and the high pressure When the high pressure of the refrigerant detected by the detecting means exceeds a predetermined value related to the high pressure abnormal state, a command signal from the control signal output means is output by the current amplifying means with output cutoff function. Cross to the control device of the air conditioner being characterized in that so as to stop supplying power to the compressor.