AUTOMATIC SHUTTER DEVICE AND VENTILATOR USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an automatic shutter device capable of improving a heat insulating effect and suppressing dew condensation at low temperatures.

SOLUTION: This automatic shutter device comprises a first shutter part 12 formed with ventilating parts 12a opened to ventilate between the indoor and outdoor sides, and shielding parts 12b intercepting ventilation; a second shutter part 13 provided rotatably around the center axis of an outer sheath body 11 and having shielding pieces 13b for intercepting ventilation; and a turning device 14 turning the second shutter part 13 in a direction to overlap the shielding pieces 13b and the shielding parts 12b of the first shutter part 12 when the temperature is higher than a predetermined temperature and turning the second shutter part 13 in a direction to overlap the shielding pieces 13b and the ventilating parts 12a of the first shutter part 12 when the temperature is lower than the predetermined temperature. The shielding parts 12b of the first shutter part 12 and the shielding pieces 13b of the second shutter part 13 are both formed of a heat insulating material.

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