US 12,072,118 B2
Method and device for operating a ventilation system for air in an indoor space
Uwe Haefner, Kehl (DE); Sascha Blauth, Rodenbach (DE); and Maik Sieh, Sandhausen (DE)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Filed by Carl Freudenberg KG, Weinheim (DE)
Filed on Jan. 26, 2022, as Appl. No. 17/584,415.
Claims priority of application No. 10 2021 102 517.6 (DE), filed on Feb. 3, 2021.
Prior Publication US 2022/0243946 A1, Aug. 4, 2022
Int. Cl. F24F 11/65 (2018.01); B60H 1/24 (2006.01); F24F 7/003 (2021.01); F24F 7/06 (2006.01); F24F 8/10 (2021.01); F24F 11/526 (2018.01); F24F 13/10 (2006.01); B60H 3/06 (2006.01); F24F 11/00 (2018.01); F24F 120/10 (2018.01); F24F 130/00 (2018.01)
CPC F24F 11/65 (2018.01) [B60H 1/24 (2013.01); F24F 7/003 (2021.01); F24F 7/06 (2013.01); F24F 8/10 (2021.01); F24F 11/526 (2018.01); F24F 13/10 (2013.01); B60H 3/0608 (2013.01); F24F 2011/0002 (2013.01); F24F 2120/10 (2018.01); F24F 2130/00 (2018.01)] 9 Claims
OG exemplary drawing
 
1. A method for operating a ventilation system for indoor air in an indoor space, the method comprising:
providing a fresh air portion (λ) of supplied fresh air and a recirculated air volume flow (QR) according to an operating strategy;
determining settings for a recirculated air actuator for adjusting the fresh air portion and a fan power of a fan for adjusting a mixed air volume flow (QM) of supplied recirculated and fresh air; and
increasing the fresh air portion (λ) and/or the mixed air volume flow (QM) as a function of a pathogen filtration efficiency of a cabin filter and a predetermined contamination prevention volume flow as a pathogenic indoor concentration limit value (CP) for a maximum concentration of pathogenic aerosols,
wherein the fresh air portion (λ) and/or the mixed air volume flow (QM) is incrementally increased until a pathogenic indoor concentration determined by the pathogen filtration efficiency of the cabin filter and the predetermined contamination prevention volume flow is below a threshold value.