Patent ID: 8905062
Filing Date: 2014-12-09
Classification: F17D,G01M,Y10T

Abstract:
1. A method for detecting and controlling the flow of liquid in a consuming installation, wherein the consuming installation comprises at least one opening/closing means for supplying liquid, the installation being supplied via an inlet pipe fitted with a solenoid valve, a pressure sensor upstream of the solenoid valve that is able to issue an upstream pressure signal (Pam) and a pressure sensor downstream of the solenoid valve that is able to issue a downstream pressure signal (Pav), the method comprising: calculating the difference (ΔP) between the value of the upstream pressure signal (Pam) and the value of the downstream pressure signal (Pav); comparing the difference (ΔP) with one opening triggering threshold (SΔPo); and one closing triggering threshold (SΔPf), the value of the opening trigger threshold (SΔPo) being greater than the value of the closing triggering threshold (SΔPf); when the solenoid valve is closed and the pressure difference (ΔP) reaches or exceeds the opening triggering threshold (SΔPo), generating an opening command signal (Co) and opening the solenoid valve, when the solenoid valve is opened and the pressure difference (ΔP) reaches or falls below the closing triggering threshold (SΔPf), generating a closing command signal (Cf) and closing the solenoid valve, measuring duration values (Dn) for each time period between the closing command signal (Cf) and the opening command signal (Co); memorizing and comparing the duration values (Dn), and if a predetermined number (n) of successive approximately equal duration values (Dn) are detected, then an alarm signal (Sa) is issued.