When summer comes, almost every household will use centrifugal fans. Although air conditioners have entered most people's homes now, the status of centrifugal fans cannot be underestimated. Although we will come into contact with centrifugal fans in our daily life, I believe that most readers do not understand its working principle and structure, so let Xiaobian lead you to understand it today!

When the motor inside the centrifugal fan rotates, the impeller of the fan will also rotate along with it. When the impeller rotates, a certain centrifugal force will be generated, and the air will be thrown out of the impeller. At this time, the air will be thrown out from the impeller and concentrated in the external casing. Due to the relatively slow speed and high pressure, the air will run directly from the outlet of the ventilator to the pipe. After the air in the fan is exhausted, a certain negative pressure will be formed, and the air outside the suction port will be pressed into the interior of the centrifugal fan under the action of atmospheric pressure, so it will continue to rotate, like this Under the action of the fan, the outside air will flow continuously in the centrifugal fan, thus realizing the circulation, and blowing out the wind in the process of circulation.

Speaking of the structure of a centrifugal fan, everyone must mention the fan blade. The fan blade is indeed a more important part of the centrifugal fan. Because of its existence, we can feel the wind. In addition, there is the impeller. 

The impeller is a relatively main part of the centrifugal fan. It includes the fan blades we mentioned earlier, as well as the front and rear disks that connect and fix the blades. Centrifugal fans can be divided into forward type, backward type and radial type according to the relationship between the direction of the air outlet and the direction in which the impeller rotates. 

The bending direction of the backward blade is the same as the natural motion trajectory of the gas in the air, so the energy loss is relatively small, the noise generated by the impact is small, and the efficiency is naturally improved. The forward blade is just the opposite, because the gas is forcibly changed the moving trajectory, so the noise and energy loss are relatively large, so the efficiency of the centrifugal fan is also greatly reduced.

Today, I will talk about the working principle and structure of the centrifugal fan. If you are interested in the internal structure of the centrifugal fan, you may wish to study the fan at home.