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style="text-indent:25px">通風(fēng)柜按照進(jìn)風(fēng)方式分類也分三類。通過(guò)室內(nèi)進(jìn)風(fēng)在柜內(nèi)循環(huán)后排出室外稱為全排風(fēng)式，這是應(yīng)用非常多的一種類型。當(dāng)通風(fēng)柜設(shè)置于采暖或?qū)貪穸扔锌刂埔蠓块g時(shí)，為節(jié)省采暖，空調(diào)能耗，采用從室外取補(bǔ)給風(fēng)在柜內(nèi)循環(huán)后排出室外的方式稱為補(bǔ)風(fēng)式通風(fēng)柜，寧波多功能通風(fēng)柜企業(yè)。變風(fēng)量控制式的通風(fēng)柜，寧波多功能通風(fēng)柜企業(yè)。普通的定風(fēng)量系統(tǒng)需要人工調(diào)整固定葉片的風(fēng)閥，寧波多功能通風(fēng)柜企業(yè)，調(diào)節(jié)通風(fēng)柜的排風(fēng)量，當(dāng)調(diào)節(jié)閥門到某一角度時(shí)達(dá)到希望的面風(fēng)速。變風(fēng)量控制是通過(guò)調(diào)節(jié)閥門的傳感器改變風(fēng)量達(dá)到給定的面風(fēng)速，當(dāng)然標(biāo)準(zhǔn)式成本低、變風(fēng)量成本高，適用于要求精度高的場(chǎng)合。通風(fēng)柜殼體選用金屬材料，防火不燃。寧波多功能通風(fēng)柜企業(yè)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波多功能通風(fēng)柜企業(yè),通風(fēng)柜" src="https://tyunfile.71360.com/UploadFile/rongke/637334523971923828/9573976.png"></div><p style="text-indent:25px">通風(fēng)柜的功能和應(yīng)用場(chǎng)合：通風(fēng)柜比較主要的功能是將實(shí)驗(yàn)操作時(shí)產(chǎn)生的各種有害氣體、水蒸汽、氣味、余熱等，控制在通風(fēng)柜內(nèi)并排至室外，達(dá)到為了保護(hù)使用者的安全，防止實(shí)驗(yàn)中的污染物質(zhì)向?qū)嶒?yàn)室擴(kuò)散的目的。通風(fēng)柜在各種生化和理化實(shí)驗(yàn)室中有著非常普遍的應(yīng)用，在保護(hù)實(shí)驗(yàn)樣品的純度、保證實(shí)驗(yàn)結(jié)果的準(zhǔn)確、維護(hù)實(shí)驗(yàn)室環(huán)境的清潔、改善勞動(dòng)衛(wèi)生條件和提高工作效率等方面，發(fā)揮著至關(guān)重要的作用。通風(fēng)柜可用于理化實(shí)驗(yàn)室和生物實(shí)驗(yàn)室，也可以用于潔凈實(shí)驗(yàn)室，但不適用于生物安全三級(jí)和四級(jí)實(shí)驗(yàn)室。寧波多功能通風(fēng)柜企業(yè)通風(fēng)柜控制器電路的主要功能是完成響應(yīng)外界環(huán)境的輸入。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波多功能通風(fēng)柜企業(yè),通風(fēng)柜" src="https://tyunfile.71360.com/UploadFile/rongke/637334523582246093/6442882.png"></div><p style="text-indent:25px">由于一般在通風(fēng)柜內(nèi)的上方以及調(diào)節(jié)門的后方都會(huì)有逆流及渦流的存在，所以應(yīng)盡量避免在這兩個(gè)部位產(chǎn)生大量之氣流擾動(dòng)。操作人員的位置與動(dòng)作： 1、通風(fēng)柜操作人員應(yīng)隨時(shí)注意自己本身與通風(fēng)柜之相對(duì)位置，因?yàn)橥L(fēng)柜內(nèi)會(huì)聚集污染物質(zhì)，所以操作人員不可以在通風(fēng)柜實(shí)驗(yàn)進(jìn)行中的任何時(shí)刻，將頭伸進(jìn)通風(fēng)柜內(nèi)，這將會(huì)造成污染的空氣流經(jīng)操作人員的呼吸區(qū)。避免或降低周圍環(huán)境影響——周圍湍流的影響。2、當(dāng)通風(fēng)柜內(nèi)開始產(chǎn)生污染物質(zhì)時(shí)，操作人員必須慢慢地接近或離開通風(fēng)柜，因?yàn)榭焖俚囊苿?dòng)將會(huì)造成靠近通風(fēng)柜前開口處的氣流產(chǎn)生擾動(dòng)，而帶出柜內(nèi)之污染物質(zhì)。3、在通風(fēng)柜前方，操作人員亦應(yīng)避免快速的揮動(dòng)手臂以及移動(dòng)位置。</p><p style="text-indent:25px">使用通風(fēng)柜的時(shí)間比較長(zhǎng)，必須要認(rèn)真的做好各個(gè)方面的檢查，這樣才能夠減少問(wèn)題，同時(shí)確保使用的過(guò)程更順利，很多人在做這些檢查方面的工作，可能對(duì)于其中具體的一些方法，了解的不是特別的多，這樣就會(huì)直接影響到后續(xù)的使用情況，那么大家平時(shí)在應(yīng)用的過(guò)程中如何做好檢查？每隔一段時(shí)間就要定期做好檢查，使用的時(shí)間比較長(zhǎng)，不知道什么時(shí)候會(huì)出現(xiàn)問(wèn)題，只有當(dāng)我們大家都能夠定期的去做好這些檢查方面的工作，看一看社會(huì)本身的這些情況，然后再去進(jìn)行使用，這樣所起到的作用才會(huì)更加的不錯(cuò)，所以大家在應(yīng)用的過(guò)程中，必須要采用一些恰當(dāng)?shù)姆椒?。通風(fēng)柜內(nèi)腔選用抗倍特板，不銹鋼板等阻燃或不燃材料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波多功能通風(fēng)柜企業(yè),通風(fēng)柜" src="https://tyunfile.71360.com/UploadFile/rongke/637334523874814453/7529798.png"></div><p style="text-indent:25px">通風(fēng)柜分為上部排風(fēng)式、下部排風(fēng)式和上下同時(shí)排風(fēng)式三類。為保證工作區(qū)風(fēng)速均勻，對(duì)于冷過(guò)程的通風(fēng)柜應(yīng)采用下部排風(fēng)式，對(duì)于熱過(guò)程的通風(fēng)柜采用上部排風(fēng)式，對(duì)于發(fā)熱量不穩(wěn)定的過(guò)程，可在上下均設(shè)排風(fēng)口隨柜內(nèi)發(fā)熱量的變化調(diào)節(jié)上下排風(fēng)量的比例，從而得到均勻的風(fēng)速。全排風(fēng)式通風(fēng)柜：通過(guò)室內(nèi)進(jìn)風(fēng)在柜內(nèi)循環(huán)后排出室外稱為全排風(fēng)式，這是應(yīng)用非常普遍的一種類型。補(bǔ)風(fēng)式通風(fēng)柜：當(dāng)通風(fēng)柜設(shè)置于采暖或?qū)貪穸扔锌刂埔蠓块g時(shí)，為節(jié)省采暖，空調(diào)能耗，采用從室外取補(bǔ)給風(fēng)在柜內(nèi)循環(huán)后排出室外的方式稱為補(bǔ)風(fēng)式通風(fēng)柜。為了真正實(shí)現(xiàn)高性能，通風(fēng)柜必須符合SEFA定義。寧波多功能通風(fēng)柜企業(yè)</p><p style="text-indent:25px">工作人員在結(jié)束工作、離開通風(fēng)柜前，應(yīng)將通風(fēng)柜內(nèi)設(shè)備電源關(guān)閉。寧波多功能通風(fēng)柜企業(yè)</p><p style="text-indent:25px">實(shí)驗(yàn)室排風(fēng)柜使用的屋頂排放高度：要求高出屋頂高度3米。實(shí)驗(yàn)室排風(fēng)柜屋頂排放濃度：要求經(jīng)過(guò)中效及活性炭過(guò)濾后進(jìn)行排放。滿足大氣排放標(biāo)準(zhǔn)。如遇酸性氣體，則需要考慮化學(xué)過(guò)濾器裝置在排風(fēng)箱中。如氣體有危險(xiǎn)性，則排風(fēng)機(jī)要考慮對(duì)應(yīng)的防爆等級(jí)進(jìn)行選型。?在實(shí)驗(yàn)室通風(fēng)空調(diào)系統(tǒng)中，送風(fēng)量的確定很大程度上不是由室內(nèi)負(fù)荷決定的，而是由排風(fēng)量決定。如前所述，通過(guò)負(fù)壓控制確保安全是實(shí)驗(yàn)室通風(fēng)空調(diào)的首要任務(wù)。目前普遍采用的就是設(shè)置壓差傳感器，保持設(shè)定壓差，這種控制方式對(duì)傳感器的精度要求相當(dāng)高，在實(shí)際運(yùn)行中很難保證任何時(shí)刻的壓差恒定。必須指出，并非傳感器精度和靈敏性越高，控制效果就越好。因?yàn)閷?shí)際過(guò)程中往往會(huì)有各種瞬時(shí)外界因素干擾氣流，影響室內(nèi)靜壓，如果過(guò)于靈敏，反而會(huì)出現(xiàn)與期望值相反的結(jié)果。另外，新風(fēng)吸入口的選擇也須十分謹(jǐn)慎，首要原則就是盡可能遠(yuǎn)離排風(fēng)口，其次新風(fēng)口位置也不能太低，由于地面活動(dòng)如一定范圍內(nèi)的汽車尾氣濃度和灰塵顆粒濃度較高，不僅影響實(shí)驗(yàn)室內(nèi)的空氣品質(zhì)和實(shí)驗(yàn)室安全，也縮短了過(guò)濾器的使用壽命。寧波多功能通風(fēng)柜企業(yè)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3188840.html</p></div></div></div></div></div><div id="mgdfh37" class="page-right 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