山東金光SWF正壓混流送風機、排(pai)煙口(kou)風量、余壓值達不到(dao)規范要求的(de)(de)現象在工(gong)程中比較普(pu)遍，有(you)的(de)(de)山(shan)東金(jin)光SWF正(zheng)壓混流(liu)送(song)風機、排(pai)煙口(kou)的(de)(de)風速甚至接近于(yu)零，造(zao)成這(zhe)種現象的(de)(de)原因比較復雜，主要有(you)以下幾(ji)個方面：

1、山(shan)東(dong)(dong)金(jin)(jin)(jin)光SWF正(zheng)壓混(hun)流(liu)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)選型(xing)不(bu)當。按(an)規(gui)范(fan)要(yao)求(qiu)(qiu)，防煙樓梯(ti)間及前(qian)(qian)(qian)室(shi)、合用(yong)(yong)前(qian)(qian)(qian)室(shi)和消防電梯(ti)間前(qian)(qian)(qian)室(shi)的(de)(de)機(ji)(ji)械加壓送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)量，應由(you)計算確定(ding)，當計算值(zhi)(zhi)(zhi)和規(gui)范(fan)規(gui)定(ding)的(de)(de)值(zhi)(zhi)(zhi)不(bu)一致(zhi)時，應按(an)兩者中較(jiao)大值(zhi)(zhi)(zhi)確定(ding)，有的(de)(de)設計直接按(an)規(gui)范(fan)給定(ding)的(de)(de)值(zhi)(zhi)(zhi)確定(ding)，往(wang)往(wang)導致(zhi)選用(yong)(yong)的(de)(de)山(shan)東(dong)(dong)金(jin)(jin)(jin)光SWF正(zheng)壓混(hun)流(liu)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)風(feng)(feng)(feng)(feng)(feng)(feng)量、風(feng)(feng)(feng)(feng)(feng)(feng)壓偏小，不(bu)能滿足要(yao)求(qiu)(qiu);有的(de)(de)設計采(cai)用(yong)(yong)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)與機(ji)(ji)械排煙合用(yong)(yong)系統，但施工中未按(an)設計要(yao)求(qiu)(qiu)選用(yong)(yong)雙速山(shan)東(dong)(dong)金(jin)(jin)(jin)光SWF正(zheng)壓混(hun)流(liu)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji);有的(de)(de)建設單位(wei)不(bu)按(an)設計的(de)(de)山(shan)東(dong)(dong)金(jin)(jin)(jin)光SWF正(zheng)壓混(hun)流(liu)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)型(xing)號訂貨，購(gou)買功率(lv)規(gui)格(ge)較(jiao)小的(de)(de)山(shan)東(dong)(dong)金(jin)(jin)(jin)光SWF正(zheng)壓混(hun)流(liu)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)，導致(zhi)山(shan)東(dong)(dong)金(jin)(jin)(jin)光SWF正(zheng)壓混(hun)流(liu)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)風(feng)(feng)(feng)(feng)(feng)(feng)量嚴重不(bu)足。

2、機械(xie)(xie)加壓(ya)送(song)風系統與自然排煙設施重復設置。對于建筑(zhu)(zhu)高(gao)度(du)超過50米的(de)(de)一類(lei)公共建筑(zhu)(zhu)和建筑(zhu)(zhu)高(gao)度(du)超過100米的(de)(de)居住建筑(zhu)(zhu)，按(an)《高(gao)規(gui)》要求，宜設置機械(xie)(xie)加壓(ya)送(song)風系統，有(you)的(de)(de)工程(cheng)在(zai)上述部位同(tong)時(shi)又采用了自然排煙，導致火災情況下，機械(xie)(xie)加壓(ya)送(song)風系統與自然排煙窗同(tong)時(shi)開啟時(shi)，防煙樓梯間(jian)難(nan)以形(xing)成正壓(ya)，達不到防煙效(xiao)果。

3、合用正(zheng)壓(ya)送風(feng)系(xi)(xi)統(tong)未設(she)(she)計壓(ya)差調(diao)節裝置(zhi)。按規范要求(qiu)，機械(xie)加壓(ya)送風(feng)的(de)防煙(yan)樓(lou)梯(ti)間(jian)和合用前(qian)(qian)室(shi)，宜(yi)分(fen)別獨立設(she)(she)置(zhi)送風(feng)系(xi)(xi)統(tong)，當必須(xu)共用一個系(xi)(xi)統(tong)時，應在通向合用前(qian)(qian)室(shi)的(de)支(zhi)風(feng)管(guan)上設(she)(she)置(zhi)壓(ya)差自動調(diao)節裝置(zhi)。目前(qian)(qian)很多設(she)(she)計的(de)合用正(zheng)壓(ya)送風(feng)系(xi)(xi)統(tong)沒有(you)設(she)(she)計壓(ya)差調(diao)節裝置(zhi)，無法形(xing)成樓(lou)梯(ti)間(jian)的(de)余(yu)壓(ya)值高(gao)于前(qian)(qian)室(shi)。

4、防煙(yan)分(fen)區不按(an)規范(fan)要求(qiu)設(she)置擋(dang)(dang)煙(yan)設(she)施。有相當一部(bu)分(fen)工程(cheng)，尤其是(shi)大型商場(chang)設(she)置機械排(pai)煙(yan)的部(bu)位未(wei)按(an)規范(fan)要求(qiu)在吊(diao)頂(ding)下設(she)置擋(dang)(dang)煙(yan)垂(chui)壁，有的地(di)下室雖然采用建筑的梁作擋(dang)(dang)煙(yan)設(she)施，但(dan)SWF正壓混(hun)流送風機的排(pai)煙(yan)口未(wei)按(an)規范(fan)要求(qiu)設(she)在頂(ding)棚或(huo)靠近頂(ding)棚的墻(qiang)面上，而是(shi)設(she)在梁的下面。

5、山(shan)(shan)東(dong)金(jin)光(guang)SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機設置不(bu)(bu)符合要求(qiu)。有的(de)豎向防SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機的(de)山(shan)(shan)東(dong)金(jin)光(guang)SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機采用固定百葉窗(chuang)式常開(kai)風(feng)(feng)(feng)口，風(feng)(feng)(feng)口規格尺寸基本一致，造成(cheng)各層山(shan)(shan)東(dong)金(jin)光(guang)SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機的(de)風(feng)(feng)(feng)量風(feng)(feng)(feng)速嚴重不(bu)(bu)平衡，離山(shan)(shan)東(dong)金(jin)光(guang)SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機較(jiao)遠(yuan)的(de)山(shan)(shan)東(dong)金(jin)光(guang)SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機的(de)風(feng)(feng)(feng)量不(bu)(bu)足，甚至末端的(de)山(shan)(shan)東(dong)金(jin)光(guang)SWF正(zheng)(zheng)壓(ya)(ya)混(hun)(hun)(hun)流(liu)送(song)(song)風(feng)(feng)(feng)機的(de)風(feng)(feng)(feng)速、風(feng)(feng)(feng)量接近于零。

6、風(feng)(feng)管(guan)豎(shu)井施工質量差，漏風(feng)(feng)嚴重。有相當多的工程因通風(feng)(feng)豎(shu)井不(bu)抹灰、管(guan)道連接不(bu)嚴實，常閉風(feng)(feng)口(kou)關(guan)閉不(bu)嚴密，漏風(feng)(feng)十(shi)分嚴重，導致山東金光SWF正壓混(hun)流送風(feng)(feng)機、排煙(yan)口(kou)的風(feng)(feng)速(su)、風(feng)(feng)量達不(bu)到(dao)規范要(yao)求，有的施工單(dan)位甚至取(qu)消(xiao)了豎(shu)井連接吊(diao)頂風(feng)(feng)口(kou)的風(feng)(feng)管(guan)，利用(yong)吊(diao)頂悶頂空(kong)間(jian)代替風(feng)(feng)管(guan)，也(ye)往往造成風(feng)(feng)管(guan)風(feng)(feng)口(kou)風(feng)(feng)速(su)接近于零。

同時有的將SWF正壓混流(liu)送(song)風(feng)機的山(shan)東金光SWF正壓混流(liu)送(song)風(feng)機排(pai)煙口設(she)在室內(nei)(nei)，致使火(huo)災情(qing)況下煙從室內(nei)(nei)排(pai)到(dao)室內(nei)(nei)，不(bu)僅失去了排(pai)煙作用，而且(qie)還可能造成火(huo)災的蔓延擴大。