ASSEMBLED FAN Russian patent published in 2015 - IPC F04D25/08 

FIELD: ventilation.

SUBSTANCE: nozzle for assembled fan includes air inlet hole, air outlet hole, internal channel for air movement from air inlet hole to air outlet hole, ring internal wall and external wall passing around the internal wall. The internal channel is located between the internal wall and external wall. Internal wall, at least partially determines the hole, through which air outside the nozzle is drawn in by air released from the air outlet hole. The flow control port is located along the flow after the air outlet hole. The flow control chamber is provided for air movement to the flow control port.

EFFECT: control mechanism selectively prevents air flow passage through the flow control port, to reflect the air flow released from the air outlet hole.

21 cl, 12 dwg