| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily attach and detach a unitized fresh air duct 2. SOLUTION: In a duct body 1 connected to an air cleaner 42, a first passage part 3 and a second passage part 4 are formed in bifurcately branched shapes by blow molding, and the unitized fresh air duct 2 is removably attached to a first passage part 3 tip. The fresh air duct 2 has a valve element opened and closed by a negative pressure actuator 24 in its interior. A support wall 11 provided with a protruding part 12 is integrally molded on an upper face of the second passage part 4 of the duct body 1. A bracket part 31 comprising a pair of erected walls 32 and 32 is formed on a lower face of the fresh air duct 2, and in one end, it is provided with a guide part 33 expansively opened in a tapered shape and it has a locking hole 35 engaging to the protruding part 12. The support wall 11 goes inside the bracket part 31 just by work of inserting the fresh air duct 2 into the duct body 1, and it is fixed by engagement of the protruding part 12 and the locking hole 35.</p> |
