Variable-air-volume diffuser with independent ventilation air assembly and method
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United States of America Patent
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Jan 19, 1999
Issued Date -
N/A
app pub date -
Jul 7, 1997
filing date -
Dec 11, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A variable-air-volume (VAV) conditioning system having at least one diffuser (27a-27d) for discharging supply air (SA) into a room (22a-22d) a flow control element (53) movably mounted in the diffuser for control of the volume of supply air (SA) discharged from the diffuser (27a-27d) in response to thermal loading in the room (22a-22d). The VAV system also includes a ventilation air source (41), independent of the supply air source (23), which is fluid coupled to a ventilation air opening defining structure (59), such as a nozzle, located in the diffuser housing (15) at a position downstream of the flow control element (53). A method for ensuring the flow of ventilation air (VA) into a room (22a-22d) including the step of discharging ventilation air (VA) through a ventilation air opening device (59) positioned in the diffuser housing (15) downstream of the diffuser flow control element (53) so that ventilation air flow is controlled independently of, and decoupled from, the variable flow rate of supply air (SA) which is controlled by the flow control element (53).
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