Patent ID: 8601740

Claim:
An airflow window comprising: an outer frame defining a first opening, the outer frame comprising two sidewalls; an inner frame defining a second opening, the inner frame located in the outer frame, and the first opening communicating with the second opening; a plurality of shutters, each of the plurality of shutters, being pivotably mounted on the inner frame, each of the plurality of shutters comprising metal, each of the plurality of shutters located in a shutter plane, said plane is substantially perpendicular to each of the sidewalls, and the plurality of shutters being adapted to cooperatively block the first opening and the second opening when said shutters are in a closed state; and a magnet comprising a magnetic strip, and the magnetic strip is located on one of the sidewalls of the outer frame to attract the plurality of shutters on a substantially lateral side of the plurality of shutters to reduce a rotating speed of the plurality of shutters when the plurality of shutters rotates from an open state to the closed state.