Patent ID: 11913461
Assignee: ZIEHL-ABEGG SE
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 14:
15. A method for determining a media flow moved by a fan, wherein the fan (1) comprises an electric motor (2) and an impeller (3) driven by the electric motor (2), wherein the method comprises the following steps:
ascertaining an actual pressure difference (Δp*) between a first region (10) and a second region (13), wherein the first region (10) and the second region (13) are formed in the electric motor (2) and a bulkhead (11) prevents or reduces a pressure equalization between the first region (10) and the second region (13), wherein a pressure (pA) prevails in the first region (10), which pressure corresponds to a pressure (p1) present on an inflow side, wherein a pressure (pB) prevails in the second region (13), which pressure corresponds to a pressure (p2) present on an outflow side,
ascertaining an actual speed (n) of the impeller (3), and
determining a volume flow and/or a mass flow of the media flow based on the actual pressure difference (Δp*), the actual speed (n), and a pressure characteristic curve of the fan (1).