US 11,913,461 B2
Fan and method for determining a media flow moved by the fan
Raphael Simon Obst, Öhringen (DE); Matthias Carsten Kammerer, Kupferzell (DE); Mato Mathias Krcmar, Öhringen (DE); Frieder Loercher, Braunsbach (DE); and Alexander Herold, Hardthausen (DE)
Assigned to ZIEHL-ABEGG SE, Kunzelsau (DE)
Appl. No. 17/618,147
Filed by ZIEHL-ABEGG SE, Künzelsau (DE)
PCT Filed May 7, 2020, PCT No. PCT/DE2020/200033
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/249168, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 10 2019 208 640.3 (DE), filed on Jun. 13, 2019.
Prior Publication US 2022/0235781 A1, Jul. 28, 2022
Int. Cl. F04D 25/06 (2006.01); F04D 25/08 (2006.01); F04D 27/00 (2006.01)
CPC F04D 25/0666 (2013.01) [F04D 25/08 (2013.01); F04D 25/082 (2013.01); F04D 27/001 (2013.01); F05D 2260/83 (2013.01); F05D 2270/3011 (2013.01); F05D 2270/3015 (2013.01); F05D 2270/3061 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A fan for determining a media flow moved by the fan (1), the fan having an electric motor (2) and an impeller (3) driven by the electric motor (2), wherein the impeller (3) moves a gaseous medium in a media flow from an inflow side (5) to an outflow side (7),
comprising:
a pressure sensor system,
a speed ascertainment system,
an evaluation unit, and
a bulkhead (11), which is formed inside the electric motor (3);
wherein the pressure sensor system is designed to ascertain an actual pressure difference (Δp*) between a first region (10) and a second region (13) wherein the bulkhead (11) prevents or reduces a pressure equalization between the first region (10) and the second region (13), wherein at least one of the first region (10) and the second region (13) is formed in the electric motor (2), wherein a pressure (pA) prevails in the first region (10) which corresponds to a pressure (p1) present on the inflow side, wherein a pressure (pB) prevails in the second region (13) which corresponds to a pressure (p2) present on the outflow side,
wherein the speed ascertainment system is designed to ascertain an actual speed (n) of the impeller (3), and
wherein the evaluation unit is designed to determine at least one of a mass flow and a volume flow of the medium based on the actual pressure difference (Δp*), the actual speed (n), and a pressure characteristic curve of the fan (1).