Defrosting control method for air conditioner

The invention particularly relates to a defrosting control method for an air conditioner, which combines the temperature and time conditions of an outdoor heat exchanger of an air conditioner system with the driving current of a direct current motor to carry out accurate defrosting control, and can further remove defrosting water, foreign matters and the like on the surface of the outdoor heat exchanger through the reverse rotation of the motor. And the best defrosting effect is achieved. The temperature sensor of the heat exchanger and the driver of the direct-current motor continuously feed back data to the controller of the air conditioner, the direct-current motor can rotate reversely, and the direct-current motor can feed back data such as driving current and rotating speed to the controller of the outdoor unit of the air conditioner at the same time by modifying an existing FG signal port. According to the control method, whether the heat exchanger is blocked or not is judged, the temperature and time c