Ventilation device which equipped with backdraft damper unit which non-motorized and used magnetic force

摘要

PURPOSE: A ventilation device comprising a non-power backflow prevention unit using magnetic force is provided to reduce manufacturing costs of the ventilation device. CONSTITUTION: A ventilation device(1) comprising a non-power backflow prevention unit using magnetic force comprises a housing, a ventilation unit, and a back flow prevention damper unit. The housing comprises an inlet(111) and outlet(112). The housing comprises a passage connecting the inlet and the outlet. The ventilation unit sucks indoor air through the inlet installed in the housing. The back flow prevention damper unit is installed in the housing by using magnetic force.