Patent ID: 8011390
Filing Date: 2011-09-06
Classification: F16K,G05D

Abstract:
1. A flow meter for measuring a flow rate of a fluid, the flow meter comprising: a regulating device comprising an actuator element including a first restriction device, and a regulating device body including a second restriction device and forming, together with said first restriction device, the choke device of the regulating device, the regulating device being provided with a flow area arranged to convey fluid between a fluid inlet and a fluid outlet, and the actuator element or regulating device body being disposed at least in a portion of the regulating device body and actuator element, respectively, characterized in that the actuator element and regulating device body are connected in such a way that the actuator element and the regulating device body are arranged to move freely independently of each other in consequence of a material expansion or material contraction, the through-put of the choke device being indirectly influenced by an energy source which is arranged to supply energy to at least one of the actuator element and/or regulating device body, wherein the flow rate being given by the formula: Gs is the flow rate of the fluid [g/s]; I is the supplied power [W], wherein I≠0; Cp is the thermal capacity of the fluid [J/g ° K]; t t