| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily replace a filter body by effectively holding the body in a filter frame. SOLUTION: The filter unit mounts a filter guide 24 in a filter frame 17 in the state that an outer periphery of a filter body 22 is inserted into the frame 17. In this case, engaging protrusions 27A, 27B projected from jambs 25A, 25B of the guide 24 are engaged with selected valleys 23a (e.g. a valley 23a formed between filter pieces 23 near ends) formed between the pieces 23 of the body 22. Thus, the body 22 can be effectively held at the frame 17, and the body 22 can be easily replaced.</p> |
