PROBLEM TO BE SOLVED: To provide an ejector-type refrigeration cycle which can elongate a continuation time of a heating operation for cooling a cooling objective fluid by cold heat which is cold-stored in cold storage means.SOLUTION: At a heating operation, a high-pressure side refrigerant of a cycle is made to flow into a nozzle passage being a refrigerant passage in a nozzle 21 of an ejector 20, and the ejector 20 exerts a suction action. Then, the refrigerant which is cooled by a cold storage material 16 is made to flow into an evaporator 14 by the suction action. At this time, a needle valve 23 for adjusting a refrigerant flow rate Gnoz flowing into the nozzle 21 is displaced so as to reduce a passage cross section area of the nozzle passage 20a accompanied by a decrease of a pressure difference (Pd-Ps) between the pressure Pd of a nozzle 21 inlet-side refrigerant and the pressure Ps of a diffuser part 20g outlet-side refrigerant. By this constitution, a time for supplying the refrigerant which is cooled by the suction action of the ejector 20 to the evaporator 14 can be elongated.SELECTED DRAWING: Figure 1

    【課題】蓄冷手段に蓄冷された冷熱によって冷却対象流体を冷却する放冷運転の継続時間を拡大させることができるエジェクタ式冷凍サイクルを提供する。【解決手段】放冷運転時に、サイクルの高圧側冷媒をエジェクタ20のノズル21内の冷媒通路であるノズル通路へ流入させてエジェクタ20に吸引作用を発揮させる。そして、この吸引作用によって、蓄冷材16にて冷却された冷媒を蒸発器14へ流入させる。この際、ノズル21入口側冷媒の圧力Pdとディフューザ部20g出口側冷媒の圧力Psとの圧力差(Pd−Ps)の縮小に伴って、ノズル通路20aの通路断面積を縮小させるように、ノズル21へ流入する冷媒流量Gnozを調整するニードル弁23を変位させる。これにより、エジェクタ20の吸引作用によって冷却された冷媒を蒸発器14へ供給可能な時間を拡大させる。【選択図】図1


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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 :

    2016-09-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS



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