亚洲综合在线播放_久久视频免费在线_久久久黄色av_亚洲免费视频一区

\r空氣污染的危害<\/span><\/span><\/span>\r<\/p>\r

\r物理危害<\/strong><\/span>：來自電場(chǎng)、工廠、汽車的廢棄含有大量重金屬，是肺癌、肝癌、腎癌、淋巴癌的主要根源。<\/span><\/span>\r<\/p>\r

\r化學(xué)危害<\/strong><\/span>：空氣中的甲醛、苯是白血病、結(jié)腸癌、腦癌的主要根源，也是胎兒畸形的主要根源。<\/span><\/span>\r<\/p>\r

\r缺氧危害<\/strong><\/span>：長期生活在缺氧環(huán)境，會(huì)使血液循環(huán)降低，會(huì)產(chǎn)生頭暈、胸悶、免疫力降低等現(xiàn)象。<\/span><\/span>\r<\/p>\r

\r生物危害<\/strong><\/span>：空氣中的細(xì)菌、病毒，是感冒、流感傳染的主要來源，尤其在霧霾天氣，細(xì)菌依附在粉塵上，可以存活更久，飄散更遠(yuǎn)。<\/span><\/span>\r<\/p>\r

\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r
\r\r<\/p>\r

\r \r<\/p>\r

\r新風(fēng)系統(tǒng)選型設(shè)計(jì)原則<\/span><\/span><\/span>\r<\/p>\r

\r根據(jù)建筑的性質(zhì)、用途，以及室內(nèi)人數(shù)按如下方式進(jìn)行計(jì)算：立方體積<\/span>×<\/span>換氣次數(shù)與人數(shù)（按18-36m<\/span><\/span>2<\/span>/人<\/span>/h<\/span>）然后選取大值來確定系統(tǒng)風(fēng)量。<\/span><\/span><\/span><\/span>\r<\/p>\r

\r案例1<\/span>：蔣婷住宅建筑面積<\/span>120m<\/span><\/span>2<\/span>,凈面積<\/span>80m<\/span><\/span>2<\/span>，建筑凈層高為2.85m<\/span>，該建筑新風(fēng)要求是？<\/span><\/span><\/span><\/span>\r<\/p>\r

\r80m<\/span>2<\/span>×2.85m=228m<\/span>3<\/span>,人數(shù)4人×36m<\/span>3<\/span>/人/h=144m<\/span>3<\/span>,每小時(shí)換氣一次為標(biāo)準(zhǔn)。<\/span><\/span><\/span>\r<\/p>\r

\r該住宅新風(fēng)風(fēng)量需求為228m<\/span>3<\/span>/h,應(yīng)選用機(jī)型ZFG-250<\/span><\/span><\/span>\r<\/p>\r

\r案例2：辦公室凈面積140m<\/span>2<\/span>,凈層高為3.2米，該建筑新風(fēng)需求是？<\/span><\/span><\/span>\r<\/p>\r

\r140m<\/span>2<\/span>×3.2m=448m<\/span>3<\/span>,人數(shù)16人×30m<\/span>3<\/span>/人/h=480m<\/span>3<\/span>,每小時(shí)換氣一次為標(biāo)準(zhǔn)。<\/span><\/span><\/span>\r<\/p>\r

\r該辦公室新風(fēng)風(fēng)量需求為480m<\/span>3<\/span>/h,應(yīng)選用機(jī)型ZFG-500。<\/span><\/span><\/span>\r<\/p>\r

\r
\r
\r
\r<\/p><\/div>