Fans can be classified in the following ways:
1.According to blade profile and airflow mode, it can be divided into: Axial fan, Centrifugal fan, side-flow fan and oblique flow fan;
When an axial flow fan works, the blade pushes the air to flow in the same direction as the axis, so it is called an axial fan.
When a centrifugal flow fan works, the blades push the air to flow in a direction perpendicular to the axis (namely the radial direction), so it is called a centrifugal fan.
2. According to the working current mode, it can be divided into: DC fan and AC fan;
Dc and AC fans are commonly used in refrigerators;
3. According to the purpose of the fan: power fan, case fan, audio fan, refrigerator fan, car fan, desktop fan, notebook fan, VGA fan, GPU fan, service fan, PDA fan, LCD fan...
Dc fan itself subdivision and more detailed:
Working voltage points: DC 5V, 12V, 36V, 48V......
By wire or function: 2PIN, 3PIN (FG), 4PIN (FG PWM)......
According to the frame size: 25MM, 30MM, 40MM, 50MM, 70MM, 120MM......
According to the circuit system, bearing system, core structure can be further subdivided;
Fan polarity and function Classification:
According to the wire: 2PIN, 3PIN, 4PIN
Divided by function: ordinary fan (2PIN), three-wire fan (FG OR RD), four-wire fan (FG & PWM), temperature control fan, etc.
Fan frame size Classification:
According to the fan length, width and height (L * W * H): such as 40*40*10 mm