DC air blower controller at bottom end of central air conditioner

The utility model relates to a controller for controlling air amount of a DC air blower, and particularly to a DC air blower controller at the bottom end of a central air conditioner. The DC air blower controller is composed of the following components: an AC and filtering circuit, a rectifying circuit, a DC high-voltage buffer output circuit, a switch power supply output circuit, a speed regulation switch, a motor interface circuit, and an MCU automatic speed regulation control circuit. According to the DC air blower controller at the bottom end of the central air conditioner, multistage air speed automatic regulation by a DC air blower set according to temperature difference is realized, and an effect of automatic and uniform air amount change according to the temperature difference change is reached, thereby improving use convenience and comfort of the air amount. Simultaneously because the DC motor has the following advantages: low self noise, high efficiency, low power consumption, small weight, etc., th