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An air distribution system for a building including a mixing plenum for receiving and mixing outside and return air. An input flow concentrator and integral silencer is disposed within and coupled to the mixing plenum. The flow concentrator and integral silencer is adapted to establish a substantial

An air distribution system for a building including a mixing plenum for receiving and mixing outside and return air. An input flow concentrator and integral silencer is disposed within and coupled to the mixing plenum. The flow concentrator and integral silencer is adapted to establish a substantially axially symmetrical flow path for air from the plenum to an output port. A fan is coupled to the output port to drive the air from the output port to the main duct for distribution throughout the building.

대표청구항 ▼

An air distribution system comprising, in combination: A. a mixing plenum including means for receiving outside and return air, B. input flow concentrator and integral silencer disposed within said plenum, said concentrator and silencer including a concentrator input port coupled to said plenum and

An air distribution system comprising, in combination: A. a mixing plenum including means for receiving outside and return air, B. input flow concentrator and integral silencer disposed within said plenum, said concentrator and silencer including a concentrator input port coupled to said plenum and sidewalls establishing an airflow path from said concentrator input port to an output port, said airflow path being substantially symmetrical about an output axis, said sidewalls including inner and outer path defining surfaces lined with acoustically absorbent material, said inner and outer path defining surfaces defining a substantially radial airflow path adjacent to said plenum and a substantially axial airflow path at said output port, said inner path defining surface being substantially symmetrical about said output axis and extending along said output axis substantially across said concentrator input port, wherein said concentrator and silencer include inner and outer sections coaxial with said airflow axis, said outer section being hollow and having an inner surface and said inner section having an outer surface, said inner section having an outer surface, said inner and outer surface being mutually separated to form said path defining surfaces. C. a fan having a fan input port coupled to said output port.