| 摘要 |
<p>A duct unit (A) for air conditioner capable of remarkably reducing not only a cost for transportation by a truck but also a cost for carrying in and outside a building by decreasing the size thereof during transportation, comprising sheet metal upper and lower wall parts (1, 3) and left and right wall parts (2, 4), wherein spin lock seams curved in curl shape are provided at both side edge parts of the wall parts (1) to (4) in longitudinal direction, and spin lock seam parts (9-1) to (9-4) are rotatably formed by inserting one of the adjacent spin lock seams provided on the adjacent wall parts into the other, whereby the duct unit (A) can be folded up in a flat since the wall parts (1) to (4) are linked to each other so as to be deformable.</p> |
