Noise reduction method and noise reduction device for vehicle-mounted charging equipment, electronic equipment and vehicle

The invention provides a noise reduction method and device for vehicle-mounted charging equipment, electronic equipment and a vehicle. Specifically, the charging equipment comprises a heat dissipation device, and the noise reduction method comprises the steps that the current temperature of electric equipment corresponding to the charging equipment is acquired; in response to the situation that the current temperature is smaller than a preset temperature threshold value, charging information of the electric equipment and current state information of the vehicle are obtained, and the temperature threshold value is used for representing the maximum temperature allowed by the electric equipment; based on the charging information and the current state information, the duty ratio of the heat dissipation device is adjusted according to a preset noise reduction rule; under the condition that normal charging and heat dissipation are achieved, the duty ratio of the heat dissipation device can be adjusted according to