VENTILATION SYSTEM

摘要

A ventilation system for ventilating the inside of a compartment such as the compartment of an automobile or the room of a building. The ventilation system prevents the contaminated outside air from flowing back into the inside of the compartment from an inside air outlet by magnetically attracting a mouth frame, which is composed of the inside air outlet and a peripheral edge, and a one-way valve for opening the inside air outlet only at the time of releasing the inside air of the compartment to the outside.