Challenges of vacuum and aspiration expansion nozzles
An expansion nozzle is a standard solution to expand the suction area: most of vacuum cleaners, cooker hoods, aspiration systems are equipped with it.
As the flow path increases, the air velocity in the expansion nozzle decreases, resulting in a steady, laminar flow becoming turbulent, causing even greater losses. Switching to a larger suction surface also inevitably distances the collection area (wider end of the expansion nozzle) from the high head area (hose).
Result: loss of performance, especially important for industrial systems and battery-powered devices, resulting in shorter operating times or increased product weight and dimensions.