Flow velocity estimation device and flow velocity estimation method

摘要

To provide a flow rate estimating device that can continuously estimate the flow rate of water in a water pipe by a simpler configuration.SOLUTION: An electromagnetic valve 2 is arranged in a water pipe 1 with a water supply valve in a downstream part 1a, and a pressure sensor 3 is arranged on the downstream side of the electromagnetic valve 2. A controller 4 determines a flow rate vbased on the differences among a loss coefficient ζof a predetermined electromagnetic valve, a water pressure P0 measured by the pressure sensor 3 in advance when the flow rate is zero, and a water pressure P1 measured by the pressure sensor 3 when the electromagnetic valve 2 is opened at a predetermined degree.SELECTED DRAWING: Figure 2