TWO-FLOW CENTRIFUGAL FAN Russian patent published in 2022 - IPC F24F7/00 F04D17/00 

FIELD: ventilation equipment.

SUBSTANCE: invention relates to ventilation equipment and can be, in particular, used in supply and exhaust ventilation systems of industrial enterprises, residential and public buildings to supply heat carriers to heat exchangers and devices, as well as in other cases when it is required to supply two gas streams simultaneously and synchronously. A two-flow centrifugal fan contains a centrifugal wheel consisting of a central disk, side rings and blades fixed between the disk and the rings, a snail housing with inlet and outlet pipes, a drive shaft mounted in bearings with a hub covering it, rigidly connected to the central disk of the centrifugal wheel. The snail body is made of two parts, right and left, connected to each other to form a peripheral dead-end annular slit between them, in which the outer edge of the central disk is placed with gaps, each of the two parts of the snail body has its own inlet and outlet pipes, there is a labyrinth seal between the walls of the peripheral annular slit and the outer edge of the central disk.

EFFECT: present invention is aimed at simultaneous supply of two gas flows by one fan and at expanding its functionality.

1 cl, 5 dwg