The effect of smoking is not obvious, and it is difficult to form the pressure value required for pressurized air supply and 3C fire smoke.The air flow and residual pressure at the outlet and outlets cannot meet the engineering requirements. It is very common. Even the air outlet flow of some 3C firefighting is basically zero.The causes of these phenomena are more complicated, mainly in the following aspects.
3C fan type selection is improper.The 3C fire exhaust fans pressure supply volume should be calculated and determined according to the requirements of the specifications.When the calculation value is inconsistent with the specification value of the specification, the larger value between the two should be taken.Some designs are determined directly according to the values ??given by the specifications, which usually causes the selected equipment to be too small and cannot meet the requirements; some designs use ventilation and mechanical exhaust systems, but they often do not follow the design in construction; some construction companies do not have some construction companies; some construction companies do not have no asks; some construction companies do not have no assets.According to the designed 3C fire fan model, the equipment with small power specifications is greedy for cheap purchases, resulting in a serious decrease in traffic.
At the same time, 3C fire smoke exhaust fan and natural smoke discharge facilities.For public buildings and residential buildings with a height of more than 50 meters, a 3C fire exhaust fan should be installed in accordance with high standards, and some projects should use natural smoke exhaust systems at the same time.When a fire occurs, when the 3C fire fan and natural smoke discharge windows are opened at the same time, it is difficult to form positive pressure in the 3C fan, and the smoke discharge effect cannot be achieved.
The coexistence of the front room pressure supply system does not install the adjustment of the pressure difference equipment separately.According to the regulations, the 3C fire exhaust fan and the shared front room shall be equipped with the air supply system.If the same air supply system must be used, the pressure difference equipment should be installed on the ventilation pipeline leading to the coexistence.At present, many of the pressure -free air supply system that shares the front room type does not install the adjustment pressure difference setting alone, so that the residual pressure of the 3C fire firing fan cannot be greater than the front room.
The smoke -proof partition of the 3C fan did not install the smoke exhaust valve according to regulations.There are many large shopping malls, and the place where the 3C fire firing fan is not installed on the smoke exhaust valve as required.Although some underground buildings use beams as smoke -blocking facilities, the smoke exhaust port of the 3C fan is not installed on the wall of the ceiling or near the ceiling as required, but is pressed under the beam.
The installation of the 3C fan is irregularly installed.Some 3C fire -fighting fan uses a fixed -louver -window type often open air outlet, and the size of the specifications is basically the same, making the wind speed and flow of each air outlet very unbalanced, away from the air volume of the air supply mouth away from the wind turbine, and even the wind speed and flow of the end -end air outlet are equal to zero.
The quality of the ventilation pipeline is poor and the wind leaks is serious.Some projects use inferior ventilation pipelines, and the phenomenon of poor connection, poor air outlets, and severe leakage.Whats more, the air outlet connecting the ventilation pipeline is installed indoors, so that the smoke is discharged from the room, completely losing the function of the 3C fan.
The above is the factors that cause the 3C fan smoke exhaust effect to be obvious