A compressed air system (10) includes a compressor having an inlet (20) and an outlet (22). A duct (30) fluidly connects the outlet (22) to the inlet (20) and has a valve (32) arranged in the duct (30). A controller (34) communicates with the valve (32) and commands the valve (32) to move between first and second positions (F,S) in response to a surge condition and/or an add-heat condition to regulate an amount of fluid flowing through the duct (30). The valve (32) opens to provide hot air from the compressor outlet to deice the inlet (20) or to provide the higher pressure compressor outlet air to the lower pressure compressor inlet air to obtain a pressure ratio in a desired range. The inventive compressed air unit is designed to provide a compact arrangement so that the valve (32) providing the heated, pressurized air to the inlet (20) is located in close proximity to the inlet (20) for a rapid response time. The duct (30) comprises a relatively short length of tubing interconnecting an add-heat supply outlet (74) and an add-heat plenum inlet (76), which are provided by a housing (40) of the compressor. The housing also includes an add-heat plenum (72) having an annular wall (70) arranged at the inlet (20) to provide an annular cavity (72). Hot air from the compressor outlet is provided to the plenum (72) to heat the annular wall (70) quickly at the inlet (20) to prevent deicing.


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    Title :

    Integral add heat and surge control valve for compressor


    Additional title:

    Integriertes Zuwärme- und Pumpensteuerungsventil für Kompressor
    Soupape intégrée d'un compresseur pour la régulation de l'apport de chaleur et du pompage


    Contributors:

    Publication date :

    2015-10-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

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



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