With the development of science and technology, every product in every industry has high-quality products and bad products. Many customers are faced with many puzzles when choosing compressed air duct fans in Dalian. How to choose high-quality duct fans is the first problem that customers face. How to choose Dalian compressed air duct fan? Read the following points carefully, so that you will no longer be annoyed by choosing bad products!

1. The control parameters of Dalian compressed air duct fan are air volume, total pressure, efficiency, noise, motor power, etc.

2. Select different fans according to the physical and chemical properties of the gas to be transported. If clean air is recommended, ordinary ventilator shall be selected; Explosion proof ventilators shall be selected for the transportation of inflammable and explosive gases; Corrosion resistant fans shall be selected for the delivery of corrosive gases.

3. When selecting compressed air duct fan in Dalian, the air leakage loss and calculation error of the pipeline system, as well as the negative deviation of the practical air volume and air pressure of the fan shall be considered. Generally, the safety coefficient with air volume of 1.05-1.1 and air pressure of 1.10-1.15 shall be adopted. However, it is not too large to avoid the fan running in the low efficiency area for a long time.

4. Pay attention to the matching relationship between pipe network resistance characteristics and fan characteristics. In order to ensure the stable operation of the ventilator, the ventilator shall be operated near its high efficiency point. The working point of the ventilator is located at the right side of the peak value of the total pressure in the performance curve (i.e. the large air volume side, and generally located at 80% of the peak value of the total pressure).

5. For Dalian compressed air duct ventilation system with silencing request, the fan with high efficiency and low impeller circumferential speed shall be selected first, and it shall work near the high efficiency point. Corresponding noise elimination and vibration reduction measures shall also be taken according to the transmission mode of noise and vibration generated by the ventilation system.

6. Dalian compressed air duct fan has changed the blade shape, so that the air flow has local axial flow and local centrifugal effect after entering the fan. Therefore, its performance is between the axial flow fan and the centrifugal fan.

7. Dalian compressed air duct ventilator can provide medium air pressure and medium air volume, which is suitable for the ventilation system in most high-rise civil buildings at present.

Side air supply is a common form of air flow at present. Dalian compressed air duct is located in the upper part of the room and laid along the wall. The air vent is opened on one side or the other side of the air duct. It can supply and return air, and also supply and drop air. Its feature is that the tuyere shall be arranged with the top to form an attached jet and conduct heat exchange in the return air area. The return air outlet is located on the same side of the air outlet, and the wind speed is 2-5M. When hot air is supplied in winter, the louvers are adjusted to make the air flow out from the ramp. The air supply of the diffuser can be flat and side. It is also the heat exchange in the air return zone. The jet and reflux flow are short, and the effect is better when the jet is formed along the top grid. It is applicable to the room with the top grid.

The air supply range through the ribbon joint is very short. The temperature difference and speed change quickly. It is suitable for large-scale heat dissipation places such as textile mills and high-grade civil buildings, and only for cooling.

However, there are many related enterprises in the market, whether it is Dalian compressed air duct system or domestic fresh air fan. The brand of fresh air system is dazzling, and the market is even a little confusing. Ordinary consumers or dealers and agents who have just come into contact with the fresh air system market simply do not know which brand of fresh air system should be selected, and do not know which brand of fresh air fan is more suitable for them.