| 摘要 |
A ventilation fan according to the present invention comprises: a housing; a fan motor coupled to a motor mounting hole formed on the housing; and an impeller coupled to a rotational shaft of the fan motor. The fan motor comprises: a first bracket which has the rotational shaft penetrating a central portion thereof, and is formed with an upper bearing insertion space therein, into which an upper bearing to support an upper end of the rotational shaft is inserted; an upper felt cover coupled to the inside of the first bracket to seal the upper bearing insertion space; a second bracket which has an upper surface thereof coupled to the first bracket, and is formed with a lower bearing insertion space, into which a lower bearing to support a lower end of the rotational shaft is inserted, on a central portion of a lower surface thereof which the rotational shaft penetrates; and a lower felt cover coupled to the lower surface of the second bracket to seal the lower bearing insertion space. |
