1、发生火灾时，烟气先垂直上升，到达顶棚后再水平扩散，聚满储烟仓后再扩散至其他防烟分区。
1. In case of fire, the smoke rises vertically first, then diffuses horizontally after reaching the ceiling, and then diffuses to other smoke prevention zones after gathering in the smoke storage bin.
2、烟气上升过程中，到达一定高度后，温度下降，烟气下沉。
2. In the process of flue gas rising, after reaching a certain height, the temperature decreases and the flue gas sinks.
3、地下疏散和通风比地上困难，因此地下防排烟要比地上严格。
3. Underground evacuation and ventilation are more difficult than above ground, so underground smoke control is more strict than above ground.
4、人在烟气中低头掩鼻的最大行走距离为20m～30m。
4. The maximum walking distance of a person who lowers his head and covers his nose in smoke is 20m ~ 30m.
5、机械排烟是让着火区域局部形成相对负压。
5. Mechanical smoke exhaust is to form relative negative pressure locally in the fire area.
6、机械排烟是让烟气有序运行并排出建筑物。
6. Mechanical smoke exhaust is to make the smoke run orderly and discharge out of the building.
7、中庭发生火灾时会产生烟囱效应。
7. A fire in the atrium will produce a chimney effect.
8、甲乙类厂房（仓库）主要考虑通风、事故通风，预防发生爆炸。
8. Class A and class B plants (warehouses) mainly consider ventilation and accident ventilation to prevent explosion.
9、280℃时，烟气中已带火。
9. At 280 ℃, there is fire in the flue gas.
10、固定窗是火灾后期排出烟和热；救援窗是让消防人员进入救援。
10. Fixed windows are used to exhaust smoke and heat in the later stage of fire; The rescue window allows firefighters to enter the rescue.
11、疏散门是往疏散方向开启。
11. The evacuation door is opened in the evacuation direction.
12、加压送风作用力的方向与疏散门开启方向相反。
12. The direction of pressurized air supply force is opposite to the opening direction of evacuation door.
13、防火分区的作用在于发生火灾时，将火势控制在一定的范围内；防烟分区的作用在于发生火灾时，将烟气控制在一定的范围内。
13. The function of fire compartment is to control the fire within a certain range in case of fire; The function of smoke prevention zone is to control the smoke within a certain range in case of fire.