Patent ID: 9671266
Date: 2017-06-06
CPC Classifications: G01F

Claim:
1. A method for determining the mass flow of a gaseous medium by means of a thermal mass flow meter, said mass flow meter has at least a first temperature sensor, which can be flowed around by the medium, and has at least a second temperature sensor, which can be flowed around by the medium, comprising the steps of: spacing the first temperature sensor from the second temperature sensor; heating the first temperature sensor with a heating power Q, wherein heat transfer from the first temperature sensor into the medium depends on mass flow of the medium; determining the mass flow of the medium by means of a power coefficient PC=Q/ΔT as a function of a heating power Q and a temperature difference ΔT determining a corrected power coefficient PC at least one correction occurs by means of at least one recovery correction term K the recovery correction term K u is a value for the flow velocity of the medium; c Δ Δ e c