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通風(feng)柜(ju)的(de)功(gong)能中(zhong)最主要的(de)是排(pai)氣(qi)(qi)功(gong)能,在化學實(shi)驗(yan)(yan)室中(zhong),實(shi)驗(yan)(yan)操作時產生(sheng)(sheng)各種有害(hai)氣(qi)(qi)體、臭氣(qi)(qi)、濕氣(qi)(qi)以及(ji)易燃、易爆、腐蝕性(xing)物質,為了保(bao)護(hu)使(shi)用(yong)者(zhe)的(de)安全,防止實(shi)驗(yan)(yan)中(zhong)的(de)污染物質向實(shi)驗(yan)(yan)室擴散,在污染源附近要使(shi)用(yong)通風(feng)柜(ju),以往(wang)通風(feng)柜(ju)使(shi)用(yong)臺數較少,只在特(te)別有害(hai)且(qie)危險的(de)氣(qi)(qi)體及(ji)產生(sheng)(sheng)大量熱(re)的(de)實(shi)驗(yan)(yan)中(zhong)使(shi)用(yong)。
通(tong)(tong)(tong)風(feng)柜(ju)只擔負實(shi)驗臺(tai)的(de)(de)(de)輔助(zhu)功(gong)能。考(kao)慮到(dao)改(gai)善實(shi)驗環(huan)境(jing),在實(shi)驗臺(tai)上(shang)進(jin)行的(de)(de)(de)實(shi)驗逐漸(jian)轉(zhuan)移(yi)到(dao)通(tong)(tong)(tong)風(feng)柜(ju)內,這就(jiu)要(yao)(yao)求在通(tong)(tong)(tong)風(feng)柜(ju)里(li)要(yao)(yao)有最適于(yu)設(she)備使用(yong)的(de)(de)(de)功(gong)能。特(te)別是大(da)多新建的(de)(de)(de)實(shi)驗室(shi)都要(yao)(yao)求有空調(diao),因此在建筑(zhu)的(de)(de)(de)初步(bu)設(she)計(ji)階段就(jiu)要(yao)(yao)將通(tong)(tong)(tong)風(feng)柜(ju)的(de)(de)(de)使用(yong)臺(tai)數納入(ru)空調(diao)系統的(de)(de)(de)計(ji)劃。由于(yu)通(tong)(tong)(tong)風(feng)柜(ju)在生化實(shi)驗室(shi)中占有非(fei)常重(zhong)要(yao)(yao)的(de)(de)(de)位置,從改(gai)善實(shi)驗室(shi)環(huan)境(jing)、改(gai)善勞動衛生條件,提高(gao)工作效率等方面考(kao)慮,通(tong)(tong)(tong)風(feng)柜(ju)的(de)(de)(de)使用(yong)臺(tai)數飛躍地增加。隨之而(er)來的(de)(de)(de)是通(tong)(tong)(tong)風(feng)管道(dao),配管、配線、排風(feng)等都成為實(shi)驗室(shi)建設(she)的(de)(de)(de)重(zhong)要(yao)(yao)課題。