Karman vortex flow meter
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorSakae Kiguchi
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Abstract
A Karman vortex flow meter has detection passages located along a fluid flow in a duct. Flow outlets of the detection passages are disposed on an end face of a vortex generation element and flow inlets are disposed upstream from the flow outlets. Heating coils for detecting flow velocity change of a fluid caused by a negative pressure of a Karman vortex are mounted in the detection passages. A flow meter is used that lessens dust accumulation on heating coils, etc., and reliably detects Karman vortexes.
Claims11
A Karman vortex flow meter for detecting a period of Karman vortexes to measure a flow velocity or flow rate, said flow meter comprising:
- a duct into which a fluid flows;
- a vortex generation element disposed in said duct to produce the Karman vortexes;
- a detection passage arranged along a fluid flow in said duct and having a flow outlet disposed on a side face of said vortex generation element and a flow inlet disposed upstream from said flow outlet;
- and
- detection means placed in said detection passage for detecting variation of a flow velocity of a fluid in said detection passage caused by a negative pressure of the Karman vortex.
Dependencies are inferred from the claim text.