The fan has a long history. China has made a simple wooden hulling windmill for many years in BC, and its principle is basically the same as that of modern centrifugal fans. In 1862, the British Kenbell invented the centrifugal fan, the impeller, the chassis for the concentric circles, chassis with brick, wooden impeller with backward straight blade, the efficiency is only about 40%, mainly for mine ventilation. In 1880, people designed for the mine discharge wind of the scroll case, and backward bending blades of the centrifugal fan, the structure has been relatively perfect.

    1898 France developed into a cross-flow fan; in 1898, the Irish people to design the front of the blade of the Clover centrifugal fan, and widely used by countries; the 19th century, axial fans have been used in the mine ventilation and metallurgical industry, But its pressure is only 100 to 300 Pa, the efficiency is only 15 to 25%, until the twentieth century, 40 years after the rapid development.

    In 1935, Germany first used axial pressure equalizer for the boiler ventilation and wind; 1948, Denmark made in the operation of the adjustable axial fan; rotary axial fan, radial acceleration axial fan, diagonal fan and Cross-flow fan; 2002, China's explosion-proof centrifugal fan, in the chemical industry, petroleum, machinery and other fields are widely used, long Lin Dong explosion-proof centrifugal fan has also been developed. Centrifugal fans are commonly used in stone processing enterprises auxiliary production equipment, mainly for ventilation and dust removal devices, such as stone cutting and grinding process Cyclone dust collector and bag filter, etc. need to use the centrifugal fan to the production site for dust treatment to ensure production Clean the environment, protect the health and responsibility of producers. Fan is a high energy-consuming equipment, consumption of wind power machine power resources in the stone processing a larger proportion, with the current shortage of energy in China and the high yield and high efficiency and efficient use of the face, energy saving has become a stone production Enterprises generally concerned about the issue, many stone manufacturers to reduce the power consumption of the fan as the current important work. Reduce the power consumption of the fan In addition to improving the efficiency of the fan itself, the rational choice of fan adjustment is the most important, because the stone production load with the process of demand and change, most of the centrifugal fan fans need to be based on the host load and often Adjust the flow. At present, the stone processing enterprises fan energy saving adjustment method is relatively old, generally use throttling adjustment. When using the throttling adjustment, the fan flow is mainly used to adjust the valve or throttle baffle to adjust the fan's throttle large, low load and even throttling more than 50%, due to the existence of throttle loss and deviate from the efficient area operation, Energy waste is very serious. If you adjust the fan speed, you can cancel the throttling loss, but also to ensure that the fan is always running in the efficient area, so you can save a lot of energy. It can be said to adjust the fan speed to run the fan is an effective way to save energy, reflecting the current building materials industry, the new trend.

Qun Kai Electrical is a professional production of centrifugal fan axial fan and other products of the manufacturers, welcome friends from various circles to inquire. Hotline: 0576-86485055