Abstract: A stream of air containing oxidizable pollutants is passed in an air-conditioning system through a conditioning station, an ozonating station, a filter station downstream of the ozonating station, and a testing station downstream of the filter station and then introduced into a living space. Ozone is added to the stream in the ozone station to oxidize the pollutants in the stream. The added ozone is decomposed into stable oxygen in the filter station and the ozone concentration in the stream is detected at the testing station with a sensor and the system is at least partially shut down when the detected ozone concentration exceeds a predetermined safety threshold. The concentration of pollutants in the stream is detected upstream of the ozonating station and the amount of ozone added to the stream in the ozonating station is adjusted so that it just corresponds to the amount needed to oxidize the pollutants sensed and does not substantially exceed this amount.

Abstract: A central air conditioning unit with a blower and feed duct is provided with a filter unit between the blower and the air outlet into the space applied with the conditioned air. The filter unit has both a sorption filter and a suspended filter and is constructed and arranged to form a sound barrier, i.e. a sound-damping or sound-blocking system.

Abstract: A pass-through station for conducting an air flow and for cleaning contaminated surfaces in the station with flowing air and preventing dust particles removed during the decontamination from undesirably reaching the room to be kept clean which is supplied through the pass-through station, includes a passageway for conducting an air flow having a substantially circular air flow cross section, a central axis, oppositely disposed segmental side walls and end surfaces, air chambers alongside the passasgeway having segmental inner walls forming the oppositely disposed segmental side walls, the inner walls of the air chambers having at least one pair of slit-like air outlets formed therein diametrically opposite one another with respect to the central axis, and at least one return air pipe coaxial to the substantially circular cross section at least at one of the end surfaces, for removing an air component corresponding to the inflowing air.

Abstract: Apparatus for humidifying, cleaning and cooling of gases, especially air, with a filter layer disposed in the gas stream and a device for supplying it with liquid. The apparatus has a cuboid housing with upper inlets for outside and/or ambient air. In the housing is disposed at least one cage with a polygonal cross section and closed below. The upper surface of the cage is only partially covered by a centrally located fan, leaving a wide outer ring gap. Underneath the fan is an annular spray nozzle for the distribution of the liquid, mainly water, on an inner cage wall formed by a filter layer. The housing is equipped in its lower part with air outlet openings and in its upper part, partially covering the cage, with a channel for return of the air coming out of the cage to the annular gap at the fan.

Abstract: An air blowing outlet for air-conditioning systems has an inner ball able to be moved towards and away from a ball seat in a middle opening in a valve plate for controlling the rate of air outlet through this opening.In addition it is possible for the air direction to be radial.To this end the valve plate is able to be moved axially clear of the outlet, this opening a ring gap between it and the outlet. The plate is moved by the ball pushing against it, that is to say with the middle opening shut.