EJECTOR TYPE REFRIGERATION CYCLE DEVICE

PROBLEM TO BE SOLVED: To provide an ejector type refrigeration cycle device capable of returning lubricant into a compressor in a short time even in a case where a lubricant outflows from the inside of the compressor during long-term stop of the compressor.SOLUTION: A control device 30 executes lubricant return operation that controls operations of a compressor 11, an on-off valve 18 and the like in a case where a condition of having the probability that lubricant outflows from the inside of the compressor 11 during stop of the compressor 11 is established, and forms refrigerant flow from the compressor 11 toward at least a bypass passage 17 out of a water refrigerant heat exchanger 12 and the bypass passage 17.SELECTED DRAWING: Figure 1 【課題】圧縮機の長期間停止中に圧縮機内部から潤滑油が流出した場合に、潤滑油を短時間で圧縮機内部に戻すことができるエジェクタ式冷凍サイクル装置を提供する。【解決手段】制御装置３０は、圧縮機１１の停止中に潤滑油が圧縮機１１内部から流出した可能性がある条件が成立した場合に、圧縮機１１および開閉弁１８等の作動を制御して、圧縮機１１から水冷媒熱交換器１２とバイパス通路１７のうち少なくともバイパス通路１７に向かう冷媒流れを形成する潤滑油戻し運転を実行する。【選択図】図１