Solar ventilator and solar powered air modifier

摘要

A ventilator or product dispenser comprises a motor (14), a fan (16) and a solar cell (12), the solar cell (12) being arranged to power the motor (14) which in turn drives the fan (16) when sufficient radiation impinges upon the solar cell (12). The ventilator provides an intermittent but approximately calculable airflow and can be used in greenhouses. The product to be dispersed can be an air freshener or an insecticide. The apparatus may further comprise an electric energy storage device which is connected to receive energy from the solar power unit (12) and which is connectable to drive the fan (16). Control circuitry can be added to regulate charging of the storage device and to regulate the output thereof.