| 摘要 |
PROBLEM TO BE SOLVED: To make a packing volume of the product small, and to simplify the structure by dividing a frame member into four slidable members, dividing a corner fixing member for assembling the frame member into four members, and inserting and fixing the slidable members into the corner members to assemble the filter. SOLUTION: Portions for forming respective side faces of the frame use bar parts 2 capable of adjusting the length by being inserted from the left and right of a cylinder part 1 and slid. Protrusion edges of the bar parts 2 are inserted into the corner members 3 and fixed to form a frame in which the whole size is freely adjustable. Cylinder parts 5 are inserted into insertion fixing bars 7 of a cross shape member 4 and fixed and also doglegged bar members 6 are inserted into the cylinder parts 5 by being slid to enable to adjust the lengths of them and also the tips of the bar parts 6 are inserted into the corner members 3 and fixed. The filter is floated in order that the filter is prevented from coming into contact with blades of the fan. Then, the filter is attached to the such assembled frame part to be covered from the upper side. |
