To provide a fluid mixer which can mix fluid in each line at an optional ratio, can be stably controlled, is compact and can be easily installed and can control even pulsating fluid.
The fluid mixer mixes each fluid flowing in at least two feed lines (1, 2) at an optional ratio. One feed line is equipped with a first flow meter (3) which measures a real flow rate of the fluid and outputs it after converting it to an electric signal and another feed line is equipped with a fluid controlling valve (5) for controlling fluid pressure by pressure operation of fluid for control and a second flow meter (4) which measures the real flow rate of the fluid and outputs it after converting it to the electric signal. A controlling section (6) outputs a command signal for controlling an opening area of the fluid controlling valve (5) based on deviation between a real ratio of measured value of the real flow rate of the first flow meter to measured value of the real flow rate of the second flow meter and a set ratio of them to the fluid controlling valve or an instrument for operating the fluid controlling valve. An opening/closing valve (14) and a throttle valve (25) can be added to each supply line.
COPYRIGHT: (C)2008,JPO&INPIT
YOSHINO KENRO
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Jun Tsuruta
Tetsuro Shimada
Shinji Mitsuhashi
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