To provide a fluid flow measuring and control device for measuring a flow speed based on a pressure reduction generated by a restrictive flow element.
The device includes a proportional flow valve 10 having a fluid inlet and a fluid outlet, and an actuator 17 for modulating the proportional flow valve 10. The restrictive flow element 15 includes a fluid inlet and a fluid outlet in communication with the proportional flow valve 10, and generates a pressure reduction between the fluid inlet and the fluid outlet of the restrictive flow element 15. The device further includes means 24, 25 for measuring the pressure reduction; a means 16 for calculating the flow rate based on the pressure reduction; pressure reduction measurement means 24, 25 for controlling the fluid flow through the proportional flow valve 10 in response to the measured pressure reduction; and a control means (not shown) in communication with the actuator 17.
NIERMEYER J KARL
SHYU JIEH-HWA
BRODEUR CRAIG L
BASSER WILLIAM
| JPH09504628A | 1997-05-06 | |||
| JPH07319551A | 1995-12-08 | |||
| JPH0863235A | 1996-03-08 |
Takaaki Yasumura
Natsuki Morishita
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