正壓送風機是指向逃(tao)生樓道(dao)里(li)送(song)風的風機(ji)。它將室(shi)外(wai)風壓(ya)送(song)入室(shi)內。當建筑(zhu)物(wu)發生火災時，會產生大量(liang)煙霧(wu)、一(yi)氧化碳等有毒氣體并(bing)遮擋視線，通過正(zheng)(zheng)(zheng)壓(ya)送(song)風機(ji)給(gei)(gei)逃(tao)生的消防樓梯送(song)風，使室(shi)內的煙霧(wu)不能抵達(da)樓梯，給(gei)(gei)人們(men)逃(tao)生創造條件。正(zheng)(zheng)(zheng)壓(ya)送(song)風機(ji)一(yi)般裝于建筑(zhu)物(wu)頂(ding)，與各層的正(zheng)(zheng)(zheng)壓(ya)風閥聯動(dong)。火災初(chu)期時打開(kai)風閥，啟動(dong)正(zheng)(zheng)(zheng)壓(ya)送(song)風機(ji)，使樓梯間、電梯廳處(chu)于正(zheng)(zheng)(zheng)壓(ya)狀(zhuang)態(tai)(送(song)風狀(zhuang)態(tai))。

    榆林正壓送風機為了保證防煙樓(lou)梯(ti)(ti)(ti)(ti)間(jian)(jian)(jian)(jian)及其前(qian)室(shi)(shi)(shi)、消防電梯(ti)(ti)(ti)(ti)間(jian)(jian)(jian)(jian)前(qian)室(shi)(shi)(shi)和合用前(qian)室(shi)(shi)(shi)的(de)(de)(de)(de)正(zheng)(zheng)壓(ya)(ya)(ya)(ya)值，防止正(zheng)(zheng)壓(ya)(ya)(ya)(ya)值過大而導致疏散門難以推開，應在(zai)防煙樓(lou)梯(ti)(ti)(ti)(ti)間(jian)(jian)(jian)(jian)與(yu)前(qian)室(shi)(shi)(shi)，前(qian)室(shi)(shi)(shi)與(yu)走(zou)道之間(jian)(jian)(jian)(jian)設置(zhi)余壓(ya)(ya)(ya)(ya)閥，控制正(zheng)(zheng)壓(ya)(ya)(ya)(ya)送風(feng)機(ji)兩側正(zheng)(zheng)壓(ya)(ya)(ya)(ya)間(jian)(jian)(jian)(jian)的(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)力差不超過50Pa。為了促使防煙樓(lou)梯(ti)(ti)(ti)(ti)間(jian)(jian)(jian)(jian)內的(de)(de)(de)(de)加(jia)壓(ya)(ya)(ya)(ya)空(kong)(kong)氣向走(zou)道流動，發揮對著(zhu)火層煙氣的(de)(de)(de)(de)阻(zu)擋作用，因(yin)此要求在(zai)加(jia)壓(ya)(ya)(ya)(ya)送風(feng)時，防煙樓(lou)梯(ti)(ti)(ti)(ti)間(jian)(jian)(jian)(jian)的(de)(de)(de)(de)空(kong)(kong)氣壓(ya)(ya)(ya)(ya)力大于(yu)(yu)前(qian)室(shi)(shi)(shi)的(de)(de)(de)(de)空(kong)(kong)氣壓(ya)(ya)(ya)(ya)力，而前(qian)室(shi)(shi)(shi)的(de)(de)(de)(de)空(kong)(kong)氣壓(ya)(ya)(ya)(ya)力大于(yu)(yu)走(zou)道的(de)(de)(de)(de)空(kong)(kong)氣壓(ya)(ya)(ya)(ya)力。根據相(xiang)關研究成果，規定了防煙樓(lou)梯(ti)(ti)(ti)(ti)間(jian)(jian)(jian)(jian)和前(qian)室(shi)(shi)(shi)、合用前(qian)室(shi)(shi)(shi)、消防電梯(ti)(ti)(ti)(ti)前(qian)室(shi)(shi)(shi)、避難層的(de)(de)(de)(de)正(zheng)(zheng)壓(ya)(ya)(ya)(ya)值。給正(zheng)(zheng)壓(ya)(ya)(ya)(ya)值規定一個范圍(wei)，是為了符合工程設計的(de)(de)(de)(de)實際(ji)情(qing)況，更易(yi)于(yu)(yu)掌握(wo)與(yu)檢測。

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 山東凱億空調設備有限公司運營(ying)部(bu)：楊 2021.5.12

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