There is a gate controlling internal/external air intake

来源: biglow 于 2010-01-17 12:53:04 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (261 bytes)

回答: Air duct leak 由 biglow 于 2010-01-17 12:35:00

When it is internal, it shuts off the air from outside. However, since it is a gate, it is not a sealed valve. That means a small gap between gate and duct is always present. That is why even at internal circulation mode you will still have water dripping.