| 摘要 |
A ventilating system for an enclosed space having a plurality of air inlet ducts communicated therewith with each duct including a distributor defined by vertically spaced plates forming a peripheral discharge with the upper plate having a central aperture receiving a fan. Adjustable members are provided between the plates for varying the discharge characteristics of air and air inlet means is provided between the distributor and ceiling for inlet of air from the space into the distributor with the air inlet means having control flaps or baffles associated therewith for simultaneously controlling the air inlet from the space and the air inlet from the ducts for varying the ratio of recirculated air and fresh air being discharged from the distributor.
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