Device for the control of the quantity and/or the flow rate of a liquid
AssigneeELTEK S.p.A.
InventorCostanzo Gadini
Life of this patent
Estimating the term…
Abstract
A device for monitoring the flow rate of a liquid has an impeller with a plurality of blades arranged within a duct wherein the liquid flows, and a sensor able to detect the rotation of the impeller. A variable distributor is mounted in the duct for modifying the ratio between the number of revolutions of the impeller and the rate liquid flow in the duct in order to control the resolution of the device.
Claims24
In a device for the control of the quantity and/or the flow rate of a liquid, of the type comprising an impeller, having a plurality of blades, and arranged in use within a duct wherein the liquid flows, and a unit able to detect the rotation of the impeller, in particular for determining from the rate of rotation of the impeller the quantity and/or the flow rate of the liquid that flows in the duct, the improvement comprising distributor means mounted within said duct for selectively modifying the angle of incidence of the liquid flow on the impeller to control the ratio between the rate of rotation of the impeller and the rate of fluid flow in the duct in which the impeller is inserted.
A method for adjusting the sensitivity of a flow rate sensor which measures the rate of rotation of an impeller mounted within a duct through which flow occurs by controlling the ratio of the rate of rotation of the impeller to the rate of flow comprising mounting within the duct upstream of the impeller, a distributor having openings through which the fluid is incident on the impeller, and adjusting the openings to vary the direction of flow through the distributor and, hence, the angle of incidence of the liquid on the impeller.
Dependencies are inferred from the claim text.