止(zhi)(zhi)逆(ni)閥式：止(zhi)(zhi)逆(ni)閥式煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)則是(shi)在(zai)單管煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)上(shang)的(de)(de)各層進風口處，加裝(zhuang)一個兼有抽(chou)油(you)(you)煙(yan)(yan)(yan)(yan)機接(jie)口作用的(de)(de)復雜防氣流逆(ni)行的(de)(de)止(zhi)(zhi)逆(ni)閥，迫使煙(yan)(yan)(yan)(yan)氣向煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)單向運(yun)動，從而解決煙(yan)(yan)(yan)(yan)氣互串的(de)(de)問(wen)題，但此種做法會輕度(du)影響(xiang)油(you)(you)煙(yan)(yan)(yan)(yan)機的(de)(de)排煙(yan)(yan)(yan)(yan)效果。　每(mei)家的(de)(de)廚房里(li)(li)都有煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)，同時(shi)煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)也有主副(fu)(fu)之分，主煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)貫穿(chuan)整(zheng)個樓體，而副(fu)(fu)煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)是(shi)相對獨立的(de)(de)。一般家里(li)(li)的(de)(de)油(you)(you)煙(yan)(yan)(yan)(yan)會先到副(fu)(fu)煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)里(li)(li)，然后再通過隔板上(shang)的(de)(de)孔進入主煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)，這(zhe)樣可保證每(mei)戶的(de)(de)油(you)(you)煙(yan)(yan)(yan)(yan)是(shi)隔離開來(lai)的(de)(de)。而如果將副(fu)(fu)煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)直接(jie)連接(jie)主煙(yan)(yan)(yan)(yan)道(dao)(dao)(dao)(dao)(dao)(dao)，就會由于壓(ya)力過低而導致(zhi)倒煙(yan)(yan)(yan)(yan)或串煙(yan)(yan)(yan)(yan)現象。

酒店(dian)廚(chu)房(fang)(fang)(fang)排(pai)(pai)(pai)(pai)煙(yan)(yan)系統之(zhi)排(pai)(pai)(pai)(pai)煙(yan)(yan)管(guan)(guan)道(dao)的(de)(de)設(she)計(ji)和安(an)裝不合(he)理(li)，往往會(hui)造成(cheng)廚(chu)房(fang)(fang)(fang)排(pai)(pai)(pai)(pai)煙(yan)(yan)不通(tong)(tong)(tong)(tong)暢，直接影響油(you)煙(yan)(yan)凈化器的(de)(de)使用。餐飲廚(chu)房(fang)(fang)(fang)設(she)備通(tong)(tong)(tong)(tong)風中產(chan)生(sheng)問題的(de)(de)主要原因，一方面(mian)是由于廚(chu)房(fang)(fang)(fang)工(gong)藝設(she)計(ji)與通(tong)(tong)(tong)(tong)風設(she)計(ji)之(zhi)間(jian)協調不夠(gou)，另一方面(mian)，由于我國廚(chu)房(fang)(fang)(fang)設(she)計(ji)缺乏(fa)經(jing)驗(yan)，設(she)計(ji)不盡合(he)理(li)。主排(pai)(pai)(pai)(pai)煙(yan)(yan)管(guan)(guan)道(dao)通(tong)(tong)(tong)(tong)風面(mian)積不夠(gou)，氣體流速過大(da)。根據工(gong)程經(jing)驗(yan)，排(pai)(pai)(pai)(pai)煙(yan)(yan)主管(guan)(guan)道(dao)內風速不能超過15m/s。否(fou)則在運行一個時期以后(如(ru)一年以后)很容易造成(cheng)排(pai)(pai)(pai)(pai)煙(yan)(yan)系統不通(tong)(tong)(tong)(tong)暢。在油(you)煙(yan)(yan)凈化器的(de)(de)運行實(shi)踐中，大(da)部分案(an)例都是因排(pai)(pai)(pai)(pai)煙(yan)(yan)管(guan)(guan)道(dao)通(tong)(tong)(tong)(tong)風面(mian)積不足(zu)引起(qi)的(de)(de)不通(tong)(tong)(tong)(tong)暢，管(guan)(guan)道(dao)內氣體的(de)(de)流速都在15m/s以上。

對于設置集中空調(diao)(diao)系(xi)(xi)統(tong)(tong)的(de)(de)建(jian)筑(zhu)來說(shuo)，廚房(fang)的(de)(de)工作(zuo)(zuo)環(huan)境能夠保證(zheng)，其(qi)補風(feng)多為(wei)(wei)有(you)序送風(feng)，白鐵皮地(di)下室(shi)排煙管(guan)道(dao)制作(zuo)(zuo)，靈活性也(ye)較(jiao)大，在目前廚房(fang)的(de)(de)通風(feng)系(xi)(xi)統(tong)(tong)中，用兩臺(tai)機組分別為(wei)(wei)餐廳、廚房(fang)服務，其(qi)中廚房(fang)為(wei)(wei)全(quan)新(xin)風(feng)直(zhi)流系(xi)(xi)統(tong)(tong)，直(zhi)接(jie)補充廚房(fang)爐灶的(de)(de)排風(feng)，而(er)(er)餐廳為(wei)(wei)一次回(hui)風(feng)全(quan)新(xin)空氣系(xi)(xi)統(tong)(tong)，這(zhe)個(ge)方(fang)案能保證(zheng)餐廳和廚房(fang)的(de)(de)空調(diao)(diao)效(xiao)果，而(er)(er)且(qie)廚房(fang)和餐廳系(xi)(xi)統(tong)(tong)互不干擾，缺點是初投資較(jiao)大。