| 摘要 |
The present invention relates to an air filter, wherein fixed ventilating means is installed inside of a filter turning while giving a turn to a filter, a sub air flow opening and a dust pile-up part are installed in one side and the other side of this ventilating means, and by forcibly shaking away foreign matters including dust and removing it into outside, which is attached to outer surrounding of a filter by ventilating means installed inside of a filter while the air is constantly filtered, it is possible to use clean air without changing a filter. |
