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Electric operation condition of fire damper in planning project

Release Time：2021-07-15

The fair use of fire dampers in planning projects Once a fire occurs in a building, it will often cause serious casualties and economic losses, especially in air-conditioning construction and high-rise construction. It is particularly important to do a good job in fire prevention and smoke exhaust. In planning, you should be familiar with relevant standard requirements. Fire dampers should be set on the ventilation air-conditioning system and smoke exhaust fire dampers should be set on the smoke exhaust pipe to avoid the transmission of toxic high-temperature smoke during fire, causing fire spread and increased loss of toxicity.
(1) The air duct crosses the fire compartment.
(2) Through the ventilation, air conditioning room and important or fire risk room partition wall and floor.
(3) Fire dampers shall be set on the horizontal pipe section at the junction of the straight air duct and each layer of horizontal air duct. However, when the ventilation and air conditioning systems of each fire compartment built in multiple layers are set independently, no fire dampers may be set at the junction of the horizontal air duct and the straight main pipe in the fire damper area.
(4) One on each side of the air duct crossing the deformation joint. The fire dampers in the above parts are normally open. When the temperature reaches 70 ℃ in a fire, they are actively closed. The fire dampers should be set close to the fire separation and should be set up alone. When the fire dampers are concealed, inspection ports should be set up at the installation parts.
2, kitchen, bathroom, toilet and other straight exhaust pipes, when there is no way to avoid backflow, you must set up a fire damper on the branch pipe, public construction of the kitchen, because the temperature of the fume is high, in order to avoid misoperation of the fire damper, at the intersection of the fume exhaust pipe and the straight air duct, a 150 ℃ fuse fire damper should be set up.
3. The air conditioner will set up the fresh air system in the planning of the fresh air system. The fresh air system method is that the fire valve generally has a layered horizontal fresh air system and a straight fresh air system.
(1) Layered horizontal fresh air system The fresh air system is set up separately according to floors. There are two ways to suck in fresh air. One is to draw fresh air from the outside through a hole in the outer wall. The other is to set up a total fresh air vertical air duct. The fresh air units at each floor draw air from the vertical air duct. The former method does not need to set fire dampers at the entrance of the fresh air units. The latter will collect fresh air, the vertical air duct of the total fresh air shall cross the fire zone, and a 70 ℃ fused fire damper shall be set on the suction inlet air duct of each layer of fresh air unit.
(2) Straight fresh air system Straight fresh air system is that outdoor air is treated by fresh air units and then sent to the air-conditioned room through vertical air ducts. Generally, the fresh air units are located on the roof. It is more applicable when the floor height is low and it is difficult for fire dampers to lay fresh air ducts horizontally. For high-rise buildings, vertical air ducts should cross fire zones, and fire dampers fused at 70 ℃ are required to be set at the air outlets.
The electric smoke exhaust fire damper is applied to the mechanical smoke exhaust system. It is a 280 ℃ fire damper. It is normally closed. When a fire occurs, it is automatically opened by the automatic fire alarm linkage signal. It also has a manual actuator. It can be opened manually or long-distance in the fire control center (I. e. linkage control, manual control and automatic control). It is generally installed at the smoke exhaust port and the air duct passes through for fire prevention, the smoke prevention partition and the air duct of the smoke exhaust room pass through the wall. When the smoke temperature in the air duct reaches 280 degrees, the electric smoke exhaust fire damper is normally closed. When the smoke in the room reaches a certain concentration, it will automatically open and then automatically close at 280 degrees Celsius.