【HVAC Version】Daily Question 20180421

Prevent the spread of fire and the dispersion of smoke by dividing them into fire compartments and smoke compartments, thereby controlling the extent to which smoke spreads； By introducing a certain amount of air into a room or passage, a specific pressure is maintained inside to prevent smoke from spreading into the area; this is known as pressurized air supply for smoke prevention ； Maintain a certain flow rate at the open doorways; by controlling the direction of the airflow, prevent smoke from spreading into the evacuation passages through pressurized air supply for smoke control ； Smoke is removed from the room where the fire is occurring through heat pressure, wind pressure, or the action of smoke exhaust fans, thereby maintaining a negative pressure in that room and preventing the spread of smoke to other rooms or areas, thus facilitating smoke extraction

Utilizing air currents with sufficient velocity can effectively prevent the spread of smoke in building fires. Creating a certain pressure difference on both sides of the smoke barrier can help control the spread of smoke.

Create smoke-free or low-smoke evacuation routes or safe areas within buildings

Seal off or block smoke prevention； Guide and exhaust smoke ； Pressurized smoke prevention.

Separate or block smoke, facilitate smoke exhaust, apply pressure to prevent smoke accumulation

1. Utilizing air currents with high velocity can effectively prevent the spread of smoke in building fires； 2. A certain pressure difference is created on both sides of the smoke barrier, which helps to control the spread of smoke.

Seal off or block smoke prevention； Guide and exhaust smoke ； Pressurized smoke prevention.

Seal off or block smoke prevention； Guide and exhaust smoke ； Pressurized smoke prevention.

Seal off or block smoke prevention； Guide and exhaust smoke ； Pressurized smoke prevention.

What are the basic principles of flue gas control? Answer: Smoke control must follow these principles: prevent the spread of fire by dividing areas into fire compartments and smoke compartments, and control the extent of smoke diffusion ； By introducing a certain amount of air into a room or passage, a specific pressure is maintained inside to prevent smoke from spreading into the area; this is known as pressurized air supply for smoke prevention ； Maintain a certain flow rate at the open doorways; by controlling the direction of the airflow, prevent smoke from spreading into the evacuation passages through pressurized air supply for smoke control ； Smoke is removed from the room where the fire is occurring through heat pressure, wind pressure, or the action of smoke exhaust fans, thereby keeping that room under negative pressure and preventing the smoke from spreading to other rooms or areas, thus facilitating smoke evacuation.