Working principle of smoke exhaust fan in hotel kitchen

Working principle of smoke exhaust fan in hotel kitchen

Starting mode of fire smoke exhaust fan

1. Automatic fire alarm system starts: the alarm signal of two independent fire detectors or one fire detector in the same smoke prevention zone and a manual fire alarm button are linked to open the smoke outlet; The action signal of the smoke outlet is used as the trigger signal to start the smoke exhaust fan in linkage.

2. Manually open the smoke outlet and start the smoke exhaust fan in chain.

3. Use the multi-line operation panel of the fire linkage controller to manually start the smoke exhaust fan remotely.

4. Manually start the smoke exhaust fan through the field fan control box.

5, fire control room straight guy manual control start and stop.

Working principle of smoke exhaust fan in hotel kitchen

Maintenance method of fire smoke exhaust fan

1. Disconnect the main power supply, hang the "No Closing" sign, and check whether the motor grounding wire is in good condition.

2. Tighten the screws and connecting shafts of each part.

3. Check whether the insulation resistance of the motor meets the requirements, and check the main circuit contacts. If the contact is severely ablated (the contact is worn to 1/3 of the original thickness), the contact should be replaced.

4. Adjust the belt tightness, turn the wind wheel by hand, and observe whether the rotation is smooth.

5. Check and replace the gasket between the joint surface and the sealing filler.

Working principle of smoke exhaust fan in hotel kitchen

The flexible joints at both ends of the smoke exhaust fan must be Class A incombustible materials, and the gasket materials must also be Class A incombustible materials (fireproof canvas can be divided into four types according to functions: anti-corrosion, anti-nuclear radiation, clean air and high-pressure incombustible;