Apparatus for disinfecting at least one room, in particular for one or more persons, preferably a dwelling room, storage room, cooling room or treatment room, for example a treatment room of a building, in particular a sickroom, a patient room and/or an operating room, with:
- a rotatable bell cup for atomising a disinfectant,
- a hollow drive shaft for driving the bell cup, and
- a housing in which a drive unit for driving the drive shaft is accommodated and preferably the drive shaft is accommodated,
- characterized in that
- the housing has a plurality of cooling ribs, and/or
- the drive shaft is provided with a labyrinth seal, preferably in order to prevent unwanted penetration of liquid into the housing.