An assembly includes a selectively driven fan (46) and a bypass flow passage (149) for bypassing the fan (46). The bypass flow passage (149) communicates with a first check valve (50) to allow air to flow from the bypass flow passage (149) to a downstream location (48). A second check valve (60) allows air driven by the fan (46) to pass into a return passage and return to an inlet of the fan (46) in the event that the discharge pressure from the fan (46) overcomes a spring force associated with the second check valve (60). A heat exchanger pack (20) and an environmental control system (18) for use on an aircraft and a method are also disclosed.


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    Titel :

    Fan with dual action check valves


    Weitere Titelangaben:

    Lüfter mit Bypass- und Überdruckventil
    Ventilateur avec clapets de surpression et de dérivation


    Beteiligte:

    Erscheinungsdatum :

    2017-12-27


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F16K VALVES , Ventile




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