Flow rate measuring device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsShingo Hamada, Fumiyoshi Yonezawa, Hiroyuki Uramachi, Tomoya Yamakawa, Takeharu Oshima, Satoru Kotoh
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Abstract
A post in a fluid passage for passing a fluid flow extends across a part of the fluid flow; a measuring duct in the post extends through the post; and a flow rate detector is located in the measuring duct. The measuring duct has a fluid introduction port with an elongated shape, the measuring duct is constricted and has at least a portion located between the fluid introduction port and the flow rate detector, substantially smoothly narrowing toward a downstream direction of the flow in a longitudinal direction of the elongated shape.
Claims15
A flow rate measuring device comprising:
- a post located in a fluid passage, the fluid passage passing a fluid flow and the post extending across a part of the fluid flow;
- a measuring duct in the post, the measuring duct including a fluid introduction port having an elongated shape confronting a flow direction of the fluid flow, the elongated shape having a maximum inside dimension in a longitudinal direction and an inside dimension in a transverse direction, perpendicular to the longitudinal direction and smaller than the maximum inside dimension, the longitudinal and transverse directions being perpendicular to the fluid flow;
- and
- a flow rate detector located in the measuring duct and comprising a substantially plate-shaped mounting member extending along the fluid flow and bridging the measuring duct, substantially parallel to the longitudinal direction of the elongated shape of the fluid introduction port, and a flow rate detection element on a main surface of the mounting member, wherein the measuring duct has a portion extending from the fluid introduction port to the flow rate detector substantially smoothly narrowing along the longitudinal direction of the elongated shape.
Dependencies are inferred from the claim text.