Circuit for preventing powered on moment impact in frequency converting air conditioner

The invention provides a circuit for preventing power up instantaneous shock in inverter air conditioner which includes a positive temperature coefficient thermistor series connected with AC electrical source front line in air conditioner system, a power relay switch parallel connected with two sides of the positive temperature coefficient thermistor, the power relay coil and a controllable switch device are series connected between electrical source and ground electrode, the controllable switch device control end is connected with one electrical source in air conditioner system. The circuit provided by the invention can prevent current shock in power up instantaneous, and can conquer disadvantage of poor anti-interference performance in present device because of impervious for main control singlechip reduction, and protect air conditioner system normal working more efficiently.