CENTRIFUGAL FAN AND AIR-CONDITIONER WITH SUCH FAN Russian patent published in 2017 - IPC F24F1/00 F04D29/30 

FIELD: ventilation.

SUBSTANCE: air conditioner, including a housing and an air-blowing unit, which includes: a housing to direct suction and air emission, a centrifugal fan located inside the housing; an electric motor and a motor shaft. The fan includes: a base connected to the motor shaft; a plurality of blades spaced apart from each other in the circumferential direction of the base for guiding the air introduced in the axial direction of the base along the circumferential direction of the base; a leading edge formed on each of the blades and located near the motor shaft; a trailing edge formed on each of the blades and facing toward the outer circumferential direction of the base; and at least one first blade included in the blades. The leading edge of the first blade passes at a greater distance from the motor shaft than the leading edge of each of the other blades. The bending angle of each first blades in the direction to their respective trailing edges is greater than the bending angle of each second blades in the direction to their respective trailing edges and the trailing edge of each first blades passes at the same distance from the motor shaft as the trailing edge of each second blade.

EFFECT: reduction of the resistance created at a high static pressure, and a high flow rate.

8 cl, 12 dwg