Refrigerating cycle device



PROBLEM TO BE SOLVED: To enhance reliability by simplifying a structure for pressing and biasing one cylinder against vane and reducing the number of parts and labor in multi-cylinder rotary type closed hermetic compressors in which the vane chambers of the cylinders on the cylinder cut-off operation side are closed and the operation mode is changed by controlling the pressure in the closed chamber among the multi-cylinder rotary type hermetic compressors in which the capacity is changed in two stages, i.e., full load operation and controlled load operation by operating one cylinder under cylinder cut-off operation. SOLUTION: As shown in Fig. 9, the refrigerating cycle device uses a pilot valve 40 as the operation mode changing means for one cylinder. Also, the device has a control mode which requires a controlled load operation for starting it. COPYRIGHT: (C)2007,JPO&INPIT
【課題】一方のシリンダを休筒運転させることにより能力を全負荷運転と制御負荷運転の2段階に可変とした多気筒型ロータリー式密閉型圧縮機のうち、休筒運転側のシリンダのベーン室を密閉し、当密閉室の圧力制御により運転モードを切り換えるものにおいて、運転モード切替手段として、二方弁の数個の組み合わせによる構成にて制御を行っていたが、複雑すぎるという問題点があった。 【解決手段】一方のシリンダの運転モード切替手段としてパイロットバルブ40を使用した冷凍サイクルを構成した。また、始動時の立ち上げとして制御負荷運転からを必須とした制御モードを有する。 【選択図】図1




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