Fluid measuring device
AssigneeNissan Motor Co., Ltd.
InventorsHiroshi Kobayashi, Toru Kita, Takeshi Fujishiro
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Abstract
A fluid measuring device comprises flow meter for measuring quantities of flow or flow rates of fluid and flow rectifiers arranged upstream and downstream of the flow meter, whose rectifier elements or cells are sized and positioned such that a ratio W.sub.1 /D of a smaller width W.sub.1 of the cells to an inner diameter D of a passage for the fluid is less than 0.2 and a ratio L/W.sub.1 of a distance L between the flow meter and the upstream flow rectifier to the smaller width W.sub.1 of the cell is within 5.ltoreq.L/W.sub.1 .ltoreq.25, thereby improving an accuracy of measurement without increasing losses of pressure.
Claims15
A fluid measuring device comprising measuring means for measuring any one of quantity of flow and flow rate in a tubular passage for a fluid to be measured, and flow rectifiers arranged upstream and downstream of said measuring means, wherein said direction of the fluid flow is changed downstream of the measuring means and the flow rectifier is arranged immediately upstream of the location where the direction is changed.
A fluid measuring device comprising measuring means for measuring any one of quantity of flow and flow rate in a tubular passage for a fluid to be measured, and flow rectifiers arranged upstream and downstream of said measuring means, said flow rectifiers containing a plurality of cells wherein a ratio W.sub.1 /D of a smaller width W.sub.1 of said cells to an inner diameter D of said tubular passage is less than 0.2 and a ratio L/W.sub.1 of a distance L between said measuring means and the upstream flow rectifier to said smaller width W.sub.1 of said cell is within 5.ltoreq.L/W.sub.1 .ltoreq.25.
Dependencies are inferred from the claim text.