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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>寧波實(shí)驗(yàn)室整體通風(fēng)廠商,實(shí)驗(yàn)室通風(fēng)</p><p><span>***更新：</span>2021-02-05 08:11:48</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="tcrdamw" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">寧波榮科科技實(shí)業(yè)有限公司</a></p><p><span>聯(lián)系人：</span>程彩云</p><p><span>郵箱: </span>2529945077@qq.com</p><p><span>電話: </span>13028978763</p><p><span>傳真: </span>1302_</p><p><span>網(wǎng)址: </span>http://www.rk-lab.cn</p><p><span>手機(jī): </span>1302-28978763</p><p><span>地址: </span>集士港鎮(zhèn)賣面橋村</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="xbia3ld" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ihjldkm" class="box"><p><p style="text-indent:25px">變風(fēng)量系統(tǒng)（VAV）通風(fēng)柜 1、風(fēng)速傳感器檢測到面風(fēng)速變化時(shí)，控制器發(fā)出信號給執(zhí)行器，通過改變變風(fēng)量閥門開度來使面風(fēng)速回到設(shè)定值，要求系統(tǒng)響應(yīng)時(shí)間小于3秒； 2、通風(fēng)柜的風(fēng)速傳感器實(shí)時(shí)監(jiān)測真實(shí)的面風(fēng)速，當(dāng)面風(fēng)速不在設(shè)定范圍內(nèi)時(shí)，經(jīng)15秒延時(shí)后監(jiān)控器發(fā)出聲光報(bào)警； 3、監(jiān)控器有至大風(fēng)量和至小風(fēng)量功能，當(dāng)發(fā)生緊急情況時(shí)可以按下至大風(fēng)量按鈕，排風(fēng)閥門完全打開，當(dāng)希望通風(fēng)柜以小風(fēng)量運(yùn)行時(shí)（例如晚上）可以按下至小風(fēng)量按鈕，寧波實(shí)驗(yàn)室整體通風(fēng)廠商，通風(fēng)柜以小風(fēng)量運(yùn)行； 4、監(jiān)控器還具有低風(fēng)速運(yùn)行按鈕，按下這一按鈕，寧波實(shí)驗(yàn)室整體通風(fēng)廠商，寧波實(shí)驗(yàn)室整體通風(fēng)廠商，可以使面風(fēng)速設(shè)定值為正常值的70%，用來減少氣體排放以節(jié)能，（當(dāng)通風(fēng)柜內(nèi)有高危險(xiǎn)性物質(zhì)時(shí)不建議使用）。通風(fēng)柜的排氣不在室內(nèi)循環(huán)。寧波實(shí)驗(yàn)室整體通風(fēng)廠商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波實(shí)驗(yàn)室整體通風(fēng)廠商,實(shí)驗(yàn)室通風(fēng)" src="https://tyunfile.71360.com/UploadFile/rongke/637334530717070312/8763095.png"></div><p style="text-indent:25px">使用通風(fēng)柜的主要目的是排出實(shí)驗(yàn)中產(chǎn)生的有害氣體，保護(hù)實(shí)驗(yàn)人員的健康，也就是說要有高度的安全性和優(yōu)越的操作性，這就要求通風(fēng)柜應(yīng)具有如下功能：控制風(fēng)速功能：為防止通風(fēng)柜內(nèi)有害氣體逸出，需要有一定的吸入速度。決定通風(fēng)柜進(jìn)風(fēng)的吸入速度的要素有：實(shí)驗(yàn)內(nèi)容產(chǎn)生的熱量及與換氣次數(shù)的關(guān)系。其中主要的是實(shí)驗(yàn)內(nèi)容和有害物的性質(zhì)。通常規(guī)定，一般無毒的污染物為0.25―0.38m/s ，有毒或有危險(xiǎn)的有害物為0.4―0.5 m/s ，劇毒或有少量放射性為0.5―0.6m/s ,氣狀物為0.5m/s ,粒狀物為1m/s 。為了確保這樣的風(fēng)速,排風(fēng)機(jī)應(yīng)有必要的靜壓,即空氣通過通風(fēng)管道時(shí)的摩擦阻力。確定風(fēng)速時(shí)還必須注意噪音問題,通過空氣在管道內(nèi)流動(dòng)時(shí)以7―10m為限,超過10m將產(chǎn)生噪音,通常實(shí)驗(yàn)室的(室內(nèi)背景噪聲級)噪聲限制值為70dBA,增加管道裁面積會(huì)降低風(fēng)速,也就降低噪音,考慮到管道的經(jīng)費(fèi)和施工問題,必須慎重選擇管道及排風(fēng)機(jī)的功率。寧波實(shí)驗(yàn)室整體通風(fēng)廠商排毒柜是安全處理有害、有害氣體或蒸汽的通風(fēng)設(shè)備。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波實(shí)驗(yàn)室整體通風(fēng)廠商,實(shí)驗(yàn)室通風(fēng)" src="https://tyunfile.71360.com/UploadFile/rongke/637334530671660156/81693.png"></div><p style="text-indent:25px">通風(fēng)柜按照排風(fēng)方式分類：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，對于冷過程的通風(fēng)柜應(yīng)采用下部排風(fēng)式，對于熱過程的通風(fēng)柜采用上部排風(fēng)式，對于發(fā)熱量不穩(wěn)定的過程，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。通風(fēng)柜按照進(jìn)風(fēng)方式分類也分三類。通過室內(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。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。種就是變風(fēng)量控制式的通風(fēng)柜。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，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合。</p><p style="text-indent:25px">實(shí)驗(yàn)室裝修中通風(fēng)柜應(yīng)具有哪些功能？不倒流功能：應(yīng)具有在通風(fēng)柜內(nèi)部由排風(fēng)機(jī)產(chǎn)生的氣流將有害氣體從通風(fēng)柜內(nèi)部不反向流進(jìn)室內(nèi)的功能。為確保這一功能的實(shí)現(xiàn)，一臺(tái)通風(fēng)柜與一臺(tái)通風(fēng)機(jī)用單一管道連接是較好的方法，不能用單一管道連接的，也只限于同層同一房間的可并連，通風(fēng)機(jī)盡可能安裝在管道的末端（或?qū)禹斕帲? 補(bǔ)充功能：應(yīng)具有在排出有害氣體時(shí)，從通風(fēng)柜外吸入空氣的通道或替代裝置。控制風(fēng)速功能：為防止通風(fēng)柜內(nèi)有害氣體逸出，需要有一定的吸入速度。通風(fēng)柜按照使用狀態(tài)分類可分為整體式下部開放式、落地式、兩面式、三面玻璃式、桌上式、連體式等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波實(shí)驗(yàn)室整體通風(fēng)廠商,實(shí)驗(yàn)室通風(fēng)" src="https://tyunfile.71360.com/UploadFile/rongke/637334530644863281/1024337.png"></div><p style="text-indent:25px">實(shí)驗(yàn)室通風(fēng)工程的要求：通風(fēng)效果好、噪音低、操作簡便、節(jié)約能源，室內(nèi)壓差和溫濕度都能保持人體的舒適性。實(shí)驗(yàn)室通風(fēng)工程的重要性：實(shí)驗(yàn)室通風(fēng)工程是整個(gè)實(shí)驗(yàn)室設(shè)計(jì)和建設(shè)過程中，規(guī)模較大、影響較大的系統(tǒng)之一。通風(fēng)工程的完善與否，直接對實(shí)驗(yàn)室環(huán)境、實(shí)驗(yàn)人員的身體健康、實(shí)驗(yàn)設(shè)備的運(yùn)行維護(hù)等方面產(chǎn)生重要影響。實(shí)驗(yàn)室通風(fēng)工程的設(shè)計(jì)原則： 1、根據(jù)大樓的結(jié)構(gòu)特點(diǎn)，就近開設(shè)風(fēng)井，劃分排風(fēng)和補(bǔ)風(fēng)系統(tǒng)，管道系統(tǒng)做到“短、平、順、直”，減小系統(tǒng)阻力，降低系統(tǒng)噪聲； 2、排風(fēng)和補(bǔ)風(fēng)系統(tǒng)達(dá)到風(fēng)量平衡，保持室內(nèi)-5Pa—-10Pa的負(fù)壓，防止有害氣體的散溢，保證實(shí)驗(yàn)人員的身心健康；通風(fēng)設(shè)備主要有：通風(fēng)柜、原子吸收罩、萬向排氣罩、桌面式通風(fēng)罩等。寧波實(shí)驗(yàn)室整體通風(fēng)廠商</p><p style="text-indent:25px">在實(shí)驗(yàn)臺(tái)上進(jìn)行的實(shí)驗(yàn)逐漸轉(zhuǎn)移到通風(fēng)柜內(nèi)，這就要求在通風(fēng)柜里要有較為適于設(shè)備使用的功能。寧波實(shí)驗(yàn)室整體通風(fēng)廠商</p><p style="text-indent:25px">通風(fēng)柜靜壓控制法：兩個(gè)通風(fēng)柜相互聯(lián)系、影響的通風(fēng)管控體系，假如其中的通風(fēng)柜的柜門全部打開，這時(shí)罩面風(fēng)暫時(shí)確定為ν0，整個(gè)通風(fēng)系統(tǒng)的工作點(diǎn)就是Λ；如果通風(fēng)柜的柜門下移，就會(huì)導(dǎo)致通風(fēng)的面積減少，這個(gè)時(shí)候工作點(diǎn)的位置就往上移動(dòng)，此時(shí)則在B點(diǎn)，這樣會(huì)使通風(fēng)柜甲內(nèi)部的靜壓變大，依據(jù)相關(guān)的公式可以知道，罩面的風(fēng)速此時(shí)會(huì)增大，所以為了維持風(fēng)俗的穩(wěn)定不變，就要讓通風(fēng)柜內(nèi)部的靜壓保持穩(wěn)定。通風(fēng)柜風(fēng)速控制法在通風(fēng)柜門口安裝有一個(gè)風(fēng)速變送器，如果風(fēng)速發(fā)生變化，變送器就會(huì)自動(dòng)將信號傳遞給風(fēng)閥控制器，緊接著風(fēng)閥管控器就能夠根據(jù)這個(gè)時(shí)候柜門口的風(fēng)速改編，調(diào)整閥門的情況，從而實(shí)現(xiàn)罩面風(fēng)速的穩(wěn)定。只是這種方法在實(shí)際實(shí)施的時(shí)候，會(huì)因?yàn)楣耖T處的空氣流動(dòng)的不均勻，導(dǎo)致測得的風(fēng)速不能夠準(zhǔn)確的反應(yīng)平均的風(fēng)速，所以會(huì)產(chǎn)生一些誤差。寧波實(shí)驗(yàn)室整體通風(fēng)廠商</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3173464.html</p></div></div></div></div></div><div id="xmzr2su" class="page-right twoColRt"><div id="w77kcev" class="box01 margin10 clearfix"><h3><a 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