Firefighting smoke exhausting fan

Abstract

The invention relates to the field of fire-fighting equipment, in particular to a fire-fighting smoke exhaust fan, which is characterized in that it includes a smoke exhaust pipe, an impeller, an impeller shaft and a driving device arranged outside the smoke exhaust pipe, and the impeller includes a ring gear and is arranged on a gear The blades in the ring and the impeller are rotatably arranged on the impeller shaft in the center of the smoke exhaust pipe. The driving device includes a motor casing arranged on the outer wall of the smoke exhaust pipe, a motor arranged in the motor casing, and a motor connected to the motor shaft. A driving gear, the driving gear meshes with the ring gear, and the impeller shell is provided with an air inlet and an air outlet. In the fire-fighting smoke exhaust fan provided by the present invention, the motor is arranged outside the smoke exhaust pipe to drive the impeller to rotate to exhaust smoke, so as to avoid high-temperature smoke directly flowing through the outer wall of the motor, and to introduce external air for cooling, which can achieve a good heat dissipation effect; since the motor does not occupy The internal space of the smoke exhaust duct has a large effective area for smoke exhaust and good ventilation effect.

Description

technical field [0001] The invention relates to the field of fire-fighting equipment, in particular to a fire-fighting smoke exhaust fan. Background technique [0002] With the development of the construction industry, the fire protection of buildings is becoming more and more important. Modern buildings built in recent years are generally equipped with fire and smoke exhaust systems, which are mainly composed of induction devices, control devices, smoke exhaust ducts and smoke exhaust fans. The fire smoke exhaust fan is the core component of the fire smoke exhaust system, and the development of high-performance fire smoke exhaust fans will produce good economic and social benefits. At present, domestic general fire smoke exhaust fans adopt a double-layer structure of internal and external ventilation. The inner cylinder is responsible for heat dissipation of the motor and organizing high-temperature flue gas to transfer heat to the motor, and the outer cylinder is responsi...

AI Technical Summary

Problems solved by technology

Although the self-radiating fire-fighting smoke exhaust fan provided by the invention can reduce the noise and power generated by the motor cooling impeller, there are still the following problems: since the motor is arranged in the smoke exhaust channel, the motor is in a high-temperature environment, and the heat dissipation effect of the air-introducing duct is used. Not ideal, the motor is prone to overheating and failure. In addition, the motor occupies the internal space of the smoke exhaust duct, the effective ventilation area is small, and the smoke exhaust effect is not good

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