Patent ID: 8205635
Filing Date: 2012-06-26
Classification: G01F,G05D,Y10T

Abstract:
1. A flowmeter comprising: an upstream-side channel and a downstream-side channel through which a fluid, which is a measurement target, flows; an upstream-side pressure sensor that measures the pressure of the fluid in the upstream-side channel; a downstream-side pressure sensor that measures the pressure of the fluid in the downstream-side channel; a first throttle section disposed between the upstream-side channel and the downstream-side channel and having a channel area that is smaller than that of at least the upstream-side channel; a bypass channel branching off from between the upstream-side pressure sensor in the upstream-side channel and the first throttle section and connected with the downstream-side channel; an on/off valve that controls the flow rate of the fluid flowing through the bypass channel; and a second throttle section disposed between the bypass channel and the downstream-side channel and having a channel area that is smaller than that of at least the bypass channel.