Fan
AssigneeZiehl-Abegg SE
InventorsFrieder Loercher, Alexander Herold
Life of this patent
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Abstract
A fan, in particular axial fan and preferably backward-curved radial fan, having an impeller equipped with blades, an electric motor for rotating the impeller and a device for determining the airflow when the impeller is rotating. The device for determining the airflow includes a volume flow measuring wheel arranged in the air flow, which is arranged upstream of the impeller on the inflow side. The air volume flow is calculated or derived from the rotational speed of the volume flow measuring wheel.
Claims14
A fan, having an impeller equipped with blades, a drive for rotating the impeller and a device for determining airflow when the impeller is rotating, wherein the device comprises:
- a volume flow measuring wheel arranged in the air flow, which is arranged upstream of the impeller on an inflow side:
- wherein an air volume flow is calculated or derived from the rotational speed of the volume flow measuring wheel:
- wherein the volume flow measuring wheel is mounted on a structure arranged upstream of the impeller on an inflow side upstream of an inlet nozzle, wherein the structure is an inflow grille.
Dependencies are inferred from the claim text.