Charger and self-cleaning method thereof

The invention relates to a charger and a self-cleaning method thereof, and belongs to the technical field of equipment cleaning. The self-cleaning method comprises the steps that after charging of the charger is finished, the environment temperature and the charging module temperature are obtained; the charging module is arranged in a shell, and the environment temperature is the temperature outside the shell; when the difference value between the environment temperature and the temperature of the charging module is smaller than or equal to a temperature set value, a cleaning fan is controlled to be started, and meanwhile an air outlet side dustproof net is controlled to be opened; the external air quality index is detected, when the external air quality index is smaller than an air quality set value, the air inlet side dustproof net is controlled to be opened, and when the cleaning ending condition is met, the cleaning fan and all the dustproof nets are closed; when the external air quality index is larger t