| 摘要 |
The invention relates to a flowmeter for determining the fluid flows and the volumetric indices based on the Coanda effect. According to the invention, the flowmeter consists of a flowmeter body (1) wherein there is made a fluid flowing passage (2) from an intake area (3) into a discharge area (4), this flowing passage (2) being provided with two feedback channels (5, 6), a lateral right feedback channel (5) and a laterally left flowing channel (6), wherethrough there are alternatively formed fluid pressures acting upon the fluid jet in the intake area (3) by changing its flowing direction from a lateral right attaching surface (7) to the other lateral left attaching surface (8), this direction change alternating at a frequency which is proportional with the fluid rate of flowing through the flowing passage (2), and the frequency of changing the flowing direction is determined by means of an obstacle which is placed on the fluid flowing way, along the line (OBST) of maximum rate, inside this obstacle, a sensor (SPDif) of differential dynamic pressure being implemented, the flowmeter being also provided with a circuit (CREC) for recovering the fluid energy during flowing. |
