Patent ID: 6077330
Filing Date: 2000-06-20
Classification: B01D,F04B,Y10S

Abstract:
A compressed air system comprising:a compressor;a pressure tank;a dehumidifier filled with a drying agent;a first conduit connecting said compressor and said dehumidifier;a second conduit connecting said pressure tank and said dehumidifier;a first valve connected to said dehumidifier, said first valve having a first position in which said dehumidifier is open to the atmosphere and a second position in which said dehumidifier is closed to the atmosphere;a control unit for recording the quantity of air compressed by said compressor, and for recording data when said first valve is in said open position, whereby said control unit can estimate the degree of wetting of said drying agent using said recorded data; anda second valve connected to said dehumidifier and controlled by said control unit, said second valve having a first position at which said first valve is set in said open position when the pressure tank reaches a predetermined level and a second position at which said first valve is set in said open position where said degree of wetting of said drying agent has reached a predetermined level independent of the pressure in said pressure tank.