Axial exhaust fan is installed on the roof for ventilation and ventilation. Due to the particularity of the installation and use of the environment, it determines the special material and structure of the fan. When the roof fan is installed, the device that prevents air backflow is caused by the high speed rotation of the fan under the action of hot pressure, resulting in a lot of wind speed increasing in the air duct. Reversing the fan is very harmful to the starting of the motor, and it may be damaged due to the overrunning of the starting current. Roof fans should have reliable rain protection when designing.
Most exhaust fans have the phenomenon of large horse drawn cars in the use process. In addition, due to the changes in production and technology, the flow, pressure and temperature of the gas need to be adjusted regularly. At present, many units still use backward adjustment of the wind panel or valve opening degree to regulate the gas flow, pressure, temperature and so on. This is actually a way to increase resistance by artificially, and to meet the requirements of gas flow regulation in process and working conditions at the expense of electricity and money. This backward regulation method not only wastes valuable energy, but also has poor adjustment precision. It is difficult to meet the requirements of modern industrial production and service, and the negative effect is very serious.
With the continuous improvement and development of frequency conversion technology in recent ten years. Exhaust fan The energy saving and speed regulation performance is becoming more and more perfect. It has been widely used in AC speed regulation in different fields. It has brought considerable economic benefits to enterprises and promoted the automation process of industrial production. The operation curve of the exhaust fan is controlled by a three crystal inverter to control the fan. It is a power saving method for reducing the aerodynamic force. It has obvious power saving effect compared with the commonly used method to control the air volume of the damper. The appearance of the three crystal frequency converter has brought about a revolution in the AC speed regulation mode, and the performance of anti snow and windproof. The wind and snow and wind and sand are not as rainwater as the snow and sandstorm will not only enter the fan from the upper part.
Tags: Exhaust fan Axial fan Centrifugal fan