PROBLEM TO BE SOLVED: To provide an ejector type refrigeration cycle capable of combining improvement of COP and improvement of heating capability.SOLUTION: In a heating mode, a refrigerant circuit is switched so that a refrigerant flowing out of a diffuser portion 15d of an ejector 15 is separated into gas and liquid in an accumulator 19, the liquid-phase refrigerant separated in the accumulator 19 is allowed to flow into a heat exchanger 20 for auxiliary heating to exchange heat with outside air, and the refrigerant flowing out of the heat exchanger 20 for auxiliary heating is decompressed to be evaporated in an outdoor heat exchanger 18. Here, a dryness of the refrigerant flowing into a nozzle portion 15a of the ejector 15 is adjusted so that a refrigerant temperature in the accumulator 19 becomes higher than an outside air temperature. Thus a refrigerant pressure in the accumulator 19 is increased to improve heating capability Q of blown air in an indoor condenser 12, and the refrigerant in the heat exchanger 20 for auxiliary heating is supercooled to improve COP.SELECTED DRAWING: Figure 3

    【課題】COPの向上と加熱能力の向上とを両立可能なエジェクタ式冷凍サイクルを提供する。【解決手段】暖房モード時に、エジェクタ15のディフューザ部15dから流出した冷媒をアキュムレータ19にて気液分離し、アキュムレータ19にて分離された液相冷媒を補助加熱用熱交換器20へ流入させて外気と熱交換させ、さらに、補助加熱用熱交換器20から流出した冷媒を減圧させて室外熱交換器18にて蒸発させる冷媒回路に切り替える。この際、アキュムレータ19内の冷媒温度が外気温よりも高くなるように、エジェクタ15のノズル部15aへ流入する冷媒の乾き度を調整する。これにより、アキュムレータ19内の冷媒圧力を上昇させて室内凝縮器12における送風空気の加熱能力Qを向上させ、さらに、補助加熱用熱交換器20にて冷媒を過冷却してCOPを向上させる。【選択図】図3


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    Title :

    EJECTOR TYPE REFRIGERATION CYCLE


    Additional title:

    エジェクタ式冷凍サイクル


    Contributors:

    Publication date :

    2018-04-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht



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