本文主要揭示一些建筑中的机械防烟的新风入口设置在设备层（间）的问题。虽有的经检验指出已得到解决，但还有些未经检验，这说明问题严重，值得人们深思。机械防烟是现代建筑中一项重要的消防安全技术措施。机械防烟主要由加压送风机、新风入口、送风阀、送风风道、送风口等? This article mainly reveals the problem that some fresh air inlet of mechanical smoke prevention in the building is arranged on the equipment floor (between). Although some tests have pointed out that they have been resolved, some are still untried, which shows that the problem is serious and worthy of deep consideration. Mechanical smoke prevention is an important fire safety technology in modern buildings. Mechanical smoke mainly by pressurized blower, fresh air inlet, air supply valve, air supply duct, outlet and so on?