| 摘要 |
According to this invention, for ensuring general ventilation simultaneously with local absorbtion of some noxes, in this installation, the air flow emitted by a centrifugal fan supplies in parallel several gasodynamic devices equipped with double-ejection nozzle, inner and outer; the nozzle is located inside a tube so that, in fact, this becomes an ejector for another evacuation step, also consisting of a tube and representing the exterior multiple ejection; the interior ejection installed inside the nozzle is performed by installing a depression in a common tube that ends with a hood in the area of the local noxes source.
|
