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.


    Access

    Download


    Export, share and cite



    Title :

    Fan with dual action check valves


    Additional title:

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


    Contributors:

    Publication date :

    2017-12-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

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



    Cap assembly integrated with check valves

    LI SAM / QIN CHARLES | European Patent Office | 2020

    Free access


    CAP ASSEMBLY INTEGRATED WITH CHECK VALVES

    LI SAM / QIN CHARLES | European Patent Office | 2019

    Free access

    Paying attention to check valves

    Pauly, Christoph P. | Online Contents | 2012