US Patent 9093868 Airflow management

The present disclosure relates to an airflow management system, particularly for a lawn mower, especially a robotic lawn mower. A battery-operated robotic lawn mower has an active airflow management system that includes at least one first air vent positioned on an underside of the mower, at least one second air vent, an internal housing surrounding a motor, a fan, and at least one cooling air channel located within the housing and around said motor. An air flow path is defined between the first and the second vents, and the at least one second vent has a lower air flow capacity than an air flow capacity of the at least one cooling air channel such that, in operation, a greater volume of air is drawn through the first vent than the second.