Flow meter having a main passage and a branch passage partially

Details Flow meter having a main passage and a branch passage partially Flow meter having a main passage and a branch passage partially

1994-12-23

1996-08-13

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Thermal type

7320423, G01F 168

Patent

active

055445276

ABSTRACT:
A flow meter includes a tubular member having a main passage in which fluid flows. A branch passage member disposed in the main passage has a branch passage in which the fluid flows. A support member connects the branch passage member and a wall of the tubular member, and supports the branch passage member within the main passage. A partition arrangement disposed in the branch passage divides the branch passage into a plurality of sub passages extending along a flow of the fluid. A flow-rate measuring resistor is disposed in a region of the branch passage downstream of the partition arrangement for sensing a rate of a flow of the fluid in the branch passage. A control circuit electrically connected to the flow-rate measuring resistor is operative for calculating a measurement value from an output signal of the flow-rate measuring resistor. An outlet formed in the branch passage member is operative for connecting the branch passage with the main passage to enable the fluid to move from the branch passage into the main passage after the fluid meets the flow-rate measuring resistor. The partition arrangement includes a partition plate. A length of a part of the partition plate, measured along a direction of the fluid flow, depends on a position of the part.

REFERENCES:
patent: 4599895 (1986-07-01), Wiseman
patent: 5083455 (1992-01-01), Saito et al.
patent: 5209113 (1993-05-01), Sawada et al.
patent: 5325712 (1994-07-01), Tsutsui et al.

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