ROOF SMOKE EXHAUSTER Russian patent published in 2007 - IPC F04D17/16 

FIELD: mechanical engineering; fans and ventilators.

SUBSTANCE: proposed smoke exhauster has housing 1 with channel 2, motor 3, impeller 4 formed by main disk 13 and cover disk 14 and vanes 15. Hood installed on housing 1 is formed by flaps 5 connected with housing 1 by hinge joint 6 with axle 7 located lower than center of masses. Motor 3 is installed on platform 21 connected with housing 1 and is arranged inside protective casing 22 whose space communicates with atmosphere through air duct 23. Shaft of motor 3 is connected by bushing 25 of hub 12 with disk 13 on outer side of which vanes 24 are radially installed. Bushing 25 is provided with through holes, and vanes 25 are installed in space of impeller 4. with impeller 4 rotating , flaps 5 turn and air gets out vertically, vanes 24 suck in cold from space of casing 22, and air is sucked into impeller 4 through holes in bushing 25, thus decreasing temperature of bushing 25 and shaft of motor 3.

EFFECT: provision of vertical discharge of hot air and cooling of motor shaft.

12 cl, 11 dwg