The invention provides a switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for a ship. The switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for the ship comprises a high-temperature-stage refrigeration system, a low-temperature-stage refrigeration system, a high-temperature-stage air cooler hot fluorine defrosting system and a low-temperature-stage air cooler hot fluorine defrosting system. The high-temperature-stage air cooler hot fluorine defrosting system comprises a high-temperature-stage compressor, an exit of the high-temperature-stage compressor is divided into two paths by a first oil separator, and the second path is connected with an air suction opening of the high-temperature-stage compressor after passing through a first electromagnetic valve, a high-temperature-stage air cooler, a third electromagnetic valve, a first pressure reducing valve, a first air-liquid separator, a first one-way valve and a first heat regenerator; the low-temperature-stage air cooler hot fluorine defrosting system comprises a low-temperature-stage compressor, an exit of the low-temperature-stage compressor is divided into two paths by a precooler and a second oil separator, and the second path is connected with an air suction opening of the low-temperature-stage compressor after passing through an eighth electromagnetic valve, a low-temperature-stage air cooler, a sixth electromagnetic valve, a second pressure reducing valve, a second air-liquid separator, a third one-way valve and a second heat regenerator. The switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for the ship has remarkable effects of large refrigeration area, high cooling speed, good energy saving effect and completeness in defrosting.


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    Title :

    Switchable two-stage cascade energy-saving ultralow-temperature refrigeration system for ship


    Contributors:
    XIE JING (author) / GUO YAOJUN (author) / WANG JINFENG (author) / LI YIZHE (author) / XU MINSHENG (author)

    Publication date :

    2015-07-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / B63J Hilfsanlagen auf Schiffen , AUXILIARIES ON VESSELS



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