Views: 0 Author: Site Editor Publish Time: 2022-07-18 Origin: Site
Duct fan refers to the selection of control parameters for air volume, total pressure, efficiency, noise, motor power, etc., also known as duct fan. According to the physical and chemical properties of the gas to be transported, choose a fan for different purposes.
What are the characteristics of a duct fan?
What is the difference between a duct fan and a ventilation fan?
What is the relationship between the duct fan and the resistance characteristics of the network pipe?
First of all, the selected control of the duct fan is noise, air volume, full pressure, efficiency and motor power.
Secondly, the duct fan for different purposes can be selected according to its physical and chemical properties. For example, if the gas to be transported is clean air, we can choose a general duct fan.
The third point, when selecting a duct fan, should consider the air leakage caused by the piping system and the calculation error, as well as the deviation of the actual air volume and air pressure. Fans with a safety factor are generally used, and its safety factor ranges from 1.05 to 1.1 for air volume and 1.10 to 1.15 for air pressure. At the same time, we do not advocate using too large, in order to avoid it working in an inefficient state for a long time.
1. Different control parameters:
The control parameters of the duct fan are air volume, total pressure, efficiency, noise, motor power, etc.;
The selected control parameters of the ventilation fan are voltage and power.
2, the exhaust volume is different:
The exhaust volume of the ventilation fan is small, which is suitable for small venues;
The pressure and air volume of the duct fan are much larger than that of the ventilation fan.
3. The principle is different:
Exhaust fan is a type of air conditioning appliance that is driven by the motor to drive the fan blades to rotate and drive the airflow to exchange indoor and outdoor air;
The duct fan is by changing the shape of the blades, so that the airflow after entering the fan has both a part of the axial flow and a part of the centrifugal effect.
Note that the resistance characteristics of the network pipe and the characteristics of the duct fan should match. The duct fan should be operated near its peak efficiency point so that it can operate stably. In addition, some ventilators also have noise reduction requirements. At this time, it is necessary to choose a fan with a low impeller peripheral speed and make it work near the efficiency point. According to the way of system noise, measures should be taken to reduce noise and vibration. The performance of duct fans is intermediate between axial fans and centrifugal fans. Because it changes the shape of the blade so that there is both an axial flow and a centrifugal effect in the fan. Finally, duct fans can provide stroke volume and stroke pressure, making them suitable for use in ventilation systems in high-rise civil buildings.
Guangzhou Meihao HVAC Equipment Co. Ltd. has well integrated production line which includes Metal workshop; Plastic workshop; Blower workshop; Motor workshop and Assembly workshop.
