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    • 4. 发明申请
    • PRESSURE REGULATOR
    • WO2019186483A1
    • 2019-10-03
    • PCT/IB2019/052589
    • 2019-03-29
    • CAMOZZI AUTOMATION S.P.A.
    • FERRARINI, DarioCAMISANI, Andrea
    • F16K31/126F16K31/128G05D16/20F15B21/08
    • A pressure regulator comprises an outlet pressure sensor (16), a loading electromagnetic valve (18), an unloading electromagnetic valve (20) and a regulator control circuit (30) operatively connected to the loading electromagnetic valve (18) and to the unloading electromagnetic valve (20) and configured to pilot the loading electromagnetic valve (18) and the unloading electromagnetic valve (20) so as to cancel an error signal given by the difference between an inlet signal corresponding to the desired outlet pressure and a feedback signal provided by the outlet pressure sensor. The regulator further comprises an engaging current analysis circuit configured to: a) detect and store reference characteristics of the waveform of the engaging current of the solenoid of the loading electromagnetic valve in a stable inlet pressure condition; b) monitor, during the operation of the regulator, the waveform of said engaging current so as to detect any variations of its characteristics with respect to the corresponding reference characteristics; c) in the event of variation, provide a pilot modulation signal to the loading electromagnetic valve (18) and/or the unloading electromagnetic valve (20) and/or a pressure variation signal to the control circuit (30).