BLOWER ASSEMBLY Russian patent published in 2016 - IPC F04D25/08 

FIELD: ventilation.

SUBSTANCE: blower assembly nozzle has an air inlet, a circular air outlet and the inner air channel that extends from the air inlet and air outlet. The inner channel is arranged between the circular inner wall and the outer wall extending around the inner wall. The said inner wall defines the channel for air to be sucked from outside the nozzle which is ejected from the air outlet. The inner wall is offset relative to the outer wall so that the inner passage cross-section area varies around the channel.

EFFECT: controlled airflow ejection direction, hence, lower turbulence of the airflow developed by the blower.

43 cl, 6 dwg