REFRIGERATION CYCLE DEVICE

To solve the problem in which, when a refrigerant in a superheated gas state in a compression chamber back-flows to a refrigeration cycle through an injection hole and an injection pipeline, the degree of dryness increases, a flash gas generates, a refrigerant flow rate circulating in the refrigeration cycle lowers and predetermined capacity cannot be obtained, regarding the refrigeration cycle device including the injection hole communicating with the inside of the compression chamber, mounting a rotary compressor having a mechanism in which the injection hole opens/closes by the rotation of a piston and capable of switching between a cooling operation and a heating operation.SOLUTION: A refrigeration cycle device includes a refrigerant adjustment pipe 124 and a refrigerant adjustment valve 125. By adjusting a liquid refrigerant amount accumulated in a buffering receiver tank 122 by opening/closing of the refrigerant adjustment valve 125, even when a refrigerant in a superheated gas state back-flows to an injection pipeline 119 from a compression chamber 139, it flows into the buffering receiver tank 122, so that the degree of dryness of the refrigerant flowing in an intermediate pressure refrigerant pipeline 116 does not increase and a flash gas does not generate, and the capacity is maintained.SELECTED DRAWING: Figure 1 【課題】圧縮室内部に連通するインジェクション孔を備え、ピストンの回転によりインジェクション孔が開閉する機構を有するロータリ圧縮機を搭載する冷房運転と暖房運転との切替えが可能な冷凍サイクル装置において、圧縮室の過熱ガス状態の冷媒がインジェクション孔およびインジェクション配管を通じて冷凍サイクルに逆流すると、冷媒の乾き度が高くなりフラッシュガスが発生し、冷凍サイクルを循環する冷媒流量が低下し所定の能力が得られなくなるのを抑制すること。【解決手段】冷媒調整管１２４と冷媒調整弁１２５を備え、冷媒調整弁１２５の開閉により緩衝用レシーバタンク１２２に溜まる液冷媒量を調整することで、圧縮室１３９から過熱ガス状態の冷媒がインジェクション配管１１９に逆流しても、緩衝用レシーバタンク１２２に流入するので、中間圧冷媒配管１１６を流れる冷媒の乾き度は高くならずフラッシュガスが発生しないので能力が維持される。【選択図】図１