??當(dāng)發(fā)生火災(zāi)時(shí),其內(nèi)部的電動(dòng)執(zhí)行器會(huì)打開(kāi)風(fēng)口,溫感煙感或者是手動(dòng)火災(zāi)報(bào)警會(huì)開(kāi)啟,塔樓頂正壓風(fēng)機(jī)自動(dòng)打開(kāi),對(duì)送風(fēng)豎井進(jìn)行加壓送風(fēng),樓梯的前室通過(guò)防火風(fēng)口會(huì)源源不斷地對(duì)前室進(jìn)行送風(fēng),使前室維持正壓,保證煙氣不會(huì)