山東金光SWF正壓混流送風機、排煙口風(feng)量、余壓值達不到規范要求的現(xian)(xian)象在工程(cheng)中比較普遍，有(you)的山(shan)東金(jin)光(guang)SWF正壓混(hun)流送風(feng)機、排煙口的風(feng)速甚(shen)至接近于零，造(zao)成這種現(xian)(xian)象的原因比較復(fu)雜，主要有(you)以下幾個方面：

1、山(shan)東(dong)(dong)金(jin)光(guang)SWF正(zheng)(zheng)(zheng)壓(ya)(ya)(ya)混(hun)流送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)選(xuan)型不(bu)當。按規范(fan)要求，防煙樓梯(ti)間及前室(shi)、合用前室(shi)和消(xiao)防電梯(ti)間前室(shi)的(de)(de)機(ji)(ji)械加壓(ya)(ya)(ya)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)量(liang)，應由計算確定，當計算值(zhi)和規范(fan)規定的(de)(de)值(zhi)不(bu)一致時，應按兩者(zhe)中較大(da)值(zhi)確定，有的(de)(de)設(she)計直接按規范(fan)給(gei)定的(de)(de)值(zhi)確定，往(wang)(wang)往(wang)(wang)導致選(xuan)用的(de)(de)山(shan)東(dong)(dong)金(jin)光(guang)SWF正(zheng)(zheng)(zheng)壓(ya)(ya)(ya)混(hun)流送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)風(feng)(feng)(feng)(feng)(feng)量(liang)、風(feng)(feng)(feng)(feng)(feng)壓(ya)(ya)(ya)偏小，不(bu)能滿足要求;有的(de)(de)設(she)計采用通(tong)風(feng)(feng)(feng)(feng)(feng)與機(ji)(ji)械排煙合用系統，但(dan)施工中未按設(she)計要求選(xuan)用雙速山(shan)東(dong)(dong)金(jin)光(guang)SWF正(zheng)(zheng)(zheng)壓(ya)(ya)(ya)混(hun)流送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji);有的(de)(de)建設(she)單位(wei)不(bu)按設(she)計的(de)(de)山(shan)東(dong)(dong)金(jin)光(guang)SWF正(zheng)(zheng)(zheng)壓(ya)(ya)(ya)混(hun)流送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)型號訂貨，購買功(gong)率規格(ge)較小的(de)(de)山(shan)東(dong)(dong)金(jin)光(guang)SWF正(zheng)(zheng)(zheng)壓(ya)(ya)(ya)混(hun)流送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)，導致山(shan)東(dong)(dong)金(jin)光(guang)SWF正(zheng)(zheng)(zheng)壓(ya)(ya)(ya)混(hun)流送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)風(feng)(feng)(feng)(feng)(feng)量(liang)嚴(yan)重不(bu)足。

2、機(ji)械加壓送風系統(tong)與(yu)自然排煙設(she)施重復設(she)置(zhi)。對于建(jian)(jian)筑高(gao)度超過50米的(de)一類公(gong)共建(jian)(jian)筑和建(jian)(jian)筑高(gao)度超過100米的(de)居(ju)住建(jian)(jian)筑，按《高(gao)規》要(yao)求，宜設(she)置(zhi)機(ji)械加壓送風系統(tong)，有的(de)工(gong)程(cheng)在(zai)上述部位同時(shi)又采用了自然排煙，導致(zhi)火災情況(kuang)下，機(ji)械加壓送風系統(tong)與(yu)自然排煙窗同時(shi)開啟時(shi)，防煙樓梯間(jian)難以(yi)形成正(zheng)壓，達不到防煙效果。

3、合(he)(he)用(yong)(yong)正壓(ya)(ya)送風(feng)系統(tong)未設(she)計(ji)(ji)壓(ya)(ya)差(cha)(cha)調節裝置。按(an)規范要求，機械加(jia)壓(ya)(ya)送風(feng)的防煙樓梯間和合(he)(he)用(yong)(yong)前(qian)室，宜分別獨立設(she)置送風(feng)系統(tong)，當必(bi)須共用(yong)(yong)一(yi)個系統(tong)時，應(ying)在通向合(he)(he)用(yong)(yong)前(qian)室的支風(feng)管上設(she)置壓(ya)(ya)差(cha)(cha)自動調節裝置。目前(qian)很(hen)多設(she)計(ji)(ji)的合(he)(he)用(yong)(yong)正壓(ya)(ya)送風(feng)系統(tong)沒有設(she)計(ji)(ji)壓(ya)(ya)差(cha)(cha)調節裝置，無法形(xing)成樓梯間的余壓(ya)(ya)值(zhi)高于前(qian)室。

4、防煙(yan)(yan)(yan)分區(qu)不按規范要(yao)求設(she)(she)(she)置擋煙(yan)(yan)(yan)設(she)(she)(she)施(shi)。有相當(dang)一(yi)部分工(gong)程，尤(you)其(qi)是大型商場(chang)設(she)(she)(she)置機(ji)械排煙(yan)(yan)(yan)的(de)部位(wei)未(wei)(wei)按規范要(yao)求在吊頂(ding)下設(she)(she)(she)置擋煙(yan)(yan)(yan)垂壁(bi)，有的(de)地下室雖然采(cai)用建筑(zhu)的(de)梁作擋煙(yan)(yan)(yan)設(she)(she)(she)施(shi)，但SWF正壓混流送風機(ji)的(de)排煙(yan)(yan)(yan)口未(wei)(wei)按規范要(yao)求設(she)(she)(she)在頂(ding)棚(peng)或靠近頂(ding)棚(peng)的(de)墻(qiang)面上，而是設(she)(she)(she)在梁的(de)下面。

5、山東(dong)金(jin)光(guang)SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)設(she)置不(bu)符合要求(qiu)。有的豎向防SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)的山東(dong)金(jin)光(guang)SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)采用固定(ding)百葉窗式常(chang)開(kai)風(feng)(feng)(feng)(feng)口，風(feng)(feng)(feng)(feng)口規格尺寸基本一(yi)致，造(zao)成各層山東(dong)金(jin)光(guang)SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)的風(feng)(feng)(feng)(feng)量風(feng)(feng)(feng)(feng)速嚴重不(bu)平衡，離山東(dong)金(jin)光(guang)SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)較遠(yuan)的山東(dong)金(jin)光(guang)SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)的風(feng)(feng)(feng)(feng)量不(bu)足，甚至末端的山東(dong)金(jin)光(guang)SWF正壓(ya)混流送(song)風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)的風(feng)(feng)(feng)(feng)速、風(feng)(feng)(feng)(feng)量接近于零。

6、風(feng)(feng)管豎(shu)井(jing)施工(gong)(gong)質(zhi)量差，漏風(feng)(feng)嚴(yan)重。有相當多的(de)工(gong)(gong)程因(yin)通風(feng)(feng)豎(shu)井(jing)不(bu)抹灰、管道連接不(bu)嚴(yan)實，常閉風(feng)(feng)口關閉不(bu)嚴(yan)密，漏風(feng)(feng)十(shi)分嚴(yan)重，導致(zhi)山東金光SWF正(zheng)壓混流送風(feng)(feng)機、排煙(yan)口的(de)風(feng)(feng)速(su)、風(feng)(feng)量達不(bu)到規范(fan)要(yao)求(qiu)，有的(de)施工(gong)(gong)單(dan)位(wei)甚至(zhi)取(qu)消了豎(shu)井(jing)連接吊頂風(feng)(feng)口的(de)風(feng)(feng)管，利(li)用吊頂悶(men)頂空間代(dai)替風(feng)(feng)管，也(ye)往(wang)往(wang)造成(cheng)風(feng)(feng)管風(feng)(feng)口風(feng)(feng)速(su)接近于零。

同時有的(de)將(jiang)SWF正壓(ya)混流(liu)送(song)風(feng)機(ji)的(de)山東金光(guang)SWF正壓(ya)混流(liu)送(song)風(feng)機(ji)排煙(yan)口設(she)在室(shi)內(nei)，致使(shi)火災情況下煙(yan)從室(shi)內(nei)排到室(shi)內(nei)，不僅失(shi)去(qu)了排煙(yan)作(zuo)用，而且(qie)還可能造成火災的(de)蔓延擴大(da)。