A passenger cabin air distribution system includes a ventilation system and an ejector-diffuser. The ventilation system is operable to provide a conditioned air. The ejector-diffuser is positioned to receive a flow of the conditioned air from the ventilation system. The ejector-diffuser includes an induction unit and a diffuser section. The induction unit includes a secondary inlet in communication with a cabin air from a passenger cabin and is configured to mix the flow of the conditioned air with an induced flow of the cabin air into a mixed air. The diffuser section includes a discharge to eject the mixed air to the passenger cabin. The diffuser section is shaped to provide for efficient mixing with low backpressure in order to maintain the low motive pressure in the nozzle.

A system and method for using cold atmospheric plasma to treat an air flow to inactivate viruses and sterilize the air flow. The system comprises a source of a carrier gas, a humidifier connected to said source of a carrier gas, a source of a feed gas, a plasma generator configured to plasmatize said carrier gas into a plasma; and a mixer having an interior chamber, an active electrode inside said interior chamber and connected to an electrical output of said plasma generator, an outer electrode connected to a ground and a dielectric barrier between said inner electrode and said outer electrode, wherein said mixer has a first fluid input port connected to said source of a carrier gas, a second fluid input connected to said source of a feed gas and a fluid output connected to a ventilation system.

There is provided a wind boosted ventilation apparatus for removing exhaust gases from inside enclosed spaces to the atmosphere, said ventilation apparatus comprising a ventilation duct and an external wall having a plurality of openings, a circular pressure plate placed on the top of said ventilation duct, a shroud surrounding said ventilation duct in a such way that a gap is defined between said ventilation duct and said shroud, and a plurality of guide vanes extending outwardly and transversally with respect to the central axis, wherein said openings are extending along said external wall of the ventilation duct and are inclined at a predetermined angle with respect to central axis of said ventilation duct, and said plurality of guide vanes are placed in a such way that they divide the area between the ventilation duct and the shroud into a plurality of compartments.

There is provided a wind boosted ventilation apparatus for removing exhaust gases from inside enclosed spaces to the atmosphere, said ventilation apparatus comprising a ventilation duct and an external wall having a plurality of openings, a circular pressure plate placed on the top of said ventilation duct, a shroud surrounding said ventilation duct in a such way that a gap is defined between said ventilation duct and said shroud, and a plurality of guide vanes extending outwardly and transversally with respect to the central axis, wherein said openings are extending along said external wall of the ventilation duct and are inclined at a predetermined angle with respect to central axis of said ventilation duct, and said plurality of guide vanes are placed in a such way that they divide the area between the ventilation duct and the shroud into a plurality of compartments.

Humidifying apparatus includes a base housing an impeller and a motor for driving the impeller to generate a first air flow. A nozzle includes an interior passage for receiving the first air flow and an air outlet for emitting the first air flow. The nozzle defines an opening through which air from outside the apparatus is drawn by air emitted from the air outlet. The apparatus is configured to humidify a second air flow, which is emitted from a plurality of second air outlets. The second air flow is humidified with water supplied from a water tank mounted on the base. The water tank has an upwardly curved upper surface. The nozzle is mounted on the apparatus so that the upper surface of the water tank at least partially covers a lower section of an external surface of the nozzle.

Humidifying apparatus includes a base housing an impeller and a motor for driving the impeller to generate a first air flow. A nozzle includes an interior passage for receiving the first air flow and an air outlet for emitting the first air flow. The nozzle defines an opening through which air from outside the apparatus is drawn by air emitted from the air outlet. The apparatus is configured to humidify a second air flow, which is emitted from a plurality of second air outlets. The second air flow is humidified with water supplied from a water tank mounted on the base. The water tank has an upwardly curved upper surface. The nozzle is mounted on the apparatus so that the upper surface of the water tank at least partially covers a lower section of an external surface of the nozzle.

Humidifying apparatus includes a chamber, and a water tank for supplying water to the chamber. A baffle located within the chamber divides the chamber into an inlet section and an outlet section, and guides water received from the water tank along the inlet section to the outlet section. An air flow is conveyed over water stored in the outlet section of the chamber and is emitted from the apparatus. Water within both the inlet section and the outlet section of the chamber is irradiated with ultraviolet radiation. The water within the outlet section is atomized by a transducer to humidify the air flow.

Humidifying apparatus includes a chamber, and a water tank for supplying water to the chamber. A baffle located within the chamber divides the chamber into an inlet section and an outlet section, and guides water received from the water tank along the inlet section to the outlet section. An air flow is conveyed over water stored in the outlet section of the chamber and is emitted from the apparatus. Water within both the inlet section and the outlet section of the chamber is irradiated with ultraviolet radiation. The water within the outlet section is atomized by a transducer to humidify the air flow.

The present invention is a method of retrofitting a refrigeration unit, which contains dirty condenser coils, for more efficient operation. The method first comprises cleaning the dirty condenser coils of the refrigeration unit which are contained in an enclosure within such refrigeration unit having an opening. When the coils are in a cleaned condition the enclosure holding those coils is then covered with a non-vented cover that comprises an air-cleaning blower mounted on the outer surface of the cover over an orifice in the cover communicating with the enclosure to supply cleaned air to the enclosure containing the condenser coils.

The present invention is a method of retrofitting a refrigeration unit, which contains dirty condenser coils, for more efficient operation. The method first comprises cleaning the dirty condenser coils of the refrigeration unit which are contained in an enclosure within such refrigeration unit having an opening. When the coils are in a cleaned condition the enclosure holding those coils is then covered with a non-vented cover that comprises an air-cleaning blower mounted on the outer surface of the cover over an orifice in the cover communicating with the enclosure to supply cleaned air to the enclosure containing the condenser coils.