FAN Russian patent published in 2015 - IPC F04D25/08 

FIELD: heating.

SUBSTANCE: invention refers to fan (10) for air jet generation. The fan includes nozzle (14) mounted on a base. The base includes external case (16), noise absorbing element inside the external case (16), impeller case (64) inside the external case (16) featuring hole (70) for air inlet and hole for air outlet, impeller (52) in the impeller case, and motor (56) rotating the impeller against axis to generate air flow through impeller case. The nozzle includes external channel (86) for air flow from air outlet hole in the impeller case, and outlet section (26) through which air flow exits the fan, while noise absorbing element is positioned under air inlet hole (70) in the impeller case (64) and runs from air inlet hole along the axis at 5 to 60 mm distance.

EFFECT: bladeless low-noise fan.

15 cl, 3 dwg