Fire-fighting smoke exhaust fan

• Main Authors: HE HUAWEI, DING RUNDONG, DING HAIXIA, DING JIANGWEI, DONG MINGWEI
• Format: Patent
• Language: Chinese; English
• Published: 14.04.2020
• Subjects: BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The invention discloses a fire-fighting smoke exhaust fan. The smoke exhaust fan comprises a shell, a heat-insulating cavity, a motor, an impeller and a hub heat-insulating device; the heat-insulatingcavity is a cavity penetrating through the shell; the motor is fixed in the heat-insulating cavity; a gap is reserved between the motor and the wall of the heat-insulating cavity; the impeller is arranged in the shell and comprises a hub and cooling blades; the cooling blades are fixed on the hub; the hub heat-insulating device is arranged at the outer side of the hub and is used for isolating the hub from passing high-temperature air; and the output shaft of the motor penetrates through the wall of the heat-insulating cavity to be fixedly connected with the hub. The motor is isolated from the high-temperature air passing through the smoke exhaust fan through the heat-insulating cavity; the heat-insulating cavity is directly communicated with the external environment; the outer surface ofthe motor directly contac