Automatic control device for electric fan

The utility model discloses an automatic control device for an electric fan. The automatic control device comprises a wind force sensor and a control module; and the control module comprises a singlechip, an A/D (Analog-to-Digital) converter, a D/A (Digital-to-Analog) converter, a first power amplifier, a second power amplifier and a constant-voltage source, wherein the A/D converter is connected with the wind force sensor and the singlechip respectively, the D/A converter is connected with the singlechip, the first power amplifier and the second power amplifier respectively, and the constant-voltage source is connected with the A/D converter, the singlechip, the D/A converter, the first power amplifier and the second power amplifier respectively. Compared with the existing automatic control device with a complicated structure, the automatic control device has the characteristics of simple structure and strong operability, can effectively save electric energy and is environment-friendly and green.