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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8z2zyzd" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>大金制冷劑哪家好,制冷劑</p><p><span>***更新：</span>2021-01-02 07:22:19</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="laxpj8t" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海冰仆冷暖設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>徐佳華</p><p><span>郵箱: </span>444054147@qq.com</p><p><span>電話: </span>13761656620</p><p><span>傳真: </span>1_1</p><p><span>網(wǎng)址: </span>https://www.shbpln.com</p><p><span>手機(jī): </span>1-1</p><p><span>地址: </span>美丹路222號(hào)629室</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="ooby2ze" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="tylicya" class="box"><p><p style="text-indent:25px">在低層大氣中必須十分穩(wěn)定（也就是具有足夠長的大氣壽命），使其能夠達(dá)到臭氧層。例如氫氯氟烴雪種HCF22和HCFC123,都有一個(gè)氯原子，能消耗臭氧，其大氣壽命分別為 12.1和14年，且氯原子相對(duì)活潑，能在低層大氣中發(fā)生分解，到達(dá)臭氧層的數(shù)量就不多。因此HCFC22和HCFC123破壞臭氧的能力比CFCs小得多，大金制冷劑哪家好。制冷劑分類：無機(jī)化合物、有機(jī)化合物、混合工質(zhì)。對(duì)空調(diào)行業(yè)規(guī)定了具體淘汰目標(biāo)，1）工商制冷：2003年停止CFC11/12新灌裝，2010年停止CFC11/12維修補(bǔ)充的再灌裝。2）家電：1999年40%新生產(chǎn)的冰箱冷柜的替代，2003年70%新生產(chǎn)的冰箱冷柜的替代，2005年100% 新生產(chǎn)的冰箱冷柜的替代。3）汽車空調(diào)：2002年停止新生產(chǎn)CFC12空調(diào)，大金制冷劑哪家好，2009年后在汽車空調(diào)上只允許使用回收的CFCs。到目前為止，我國*簽署了倫敦修正案，大金制冷劑哪家好，所以尚沒對(duì)HCFCs的淘汰作出承諾。許多制冷劑本身就是溫室氣體，制冷劑被列入了討論范圍。大金制冷劑哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="大金制冷劑哪家好,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401017129067779/4260118.png"></div><p style="text-indent:25px">制冷劑飽和蒸氣的溫度與壓力呈對(duì)應(yīng)關(guān)系，若已知制冷劑的蒸發(fā)溫度即可查出相對(duì)應(yīng)的蒸發(fā)壓力。此壓力的表壓值由高、低壓壓力表顯示出來。因此，根據(jù)安裝在系統(tǒng)上壓力表的壓力值即可判斷制冷劑的充注量是否宜適。例如：空調(diào)器的蒸發(fā)溫度為7.2℃，冷凝溫度為54.5℃使用R22。查R22的飽和溫度與飽和壓力對(duì)應(yīng)表，以確定其蒸發(fā)壓力值和冷凝壓力值。查表可知：R22在7.2℃時(shí)相應(yīng)相對(duì)壓力值為0.53Mpa(5.3kg/cm2)和54.5℃時(shí)的相應(yīng)相對(duì)壓力值為2.11Mpa(21.1kg/cm2)，將此壓力換算為表壓值即可。用高、低壓壓力表或復(fù)合式壓力表測(cè)試充氟中的制冷系統(tǒng)，若高、低壓力表表壓值符合上述范圍即表明制冷劑的充注量合適;若高、低壓壓力均低則表明充入量不夠;若高、低壓壓力均高，則表明充入量過多。壓力測(cè)定法較為簡便，在維修時(shí)經(jīng)常作用，但是缺點(diǎn)是比較粗，準(zhǔn)確度不高。江蘇大金制冷劑要多少錢制冷劑，又稱制冷工質(zhì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="大金制冷劑哪家好,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016739995559/6821260.png"></div><p style="text-indent:25px">制冷劑選擇具體要求：單位容積制冷量大?？梢詼p少壓縮機(jī)輸氣量。粘度和密度小。減少系統(tǒng)中流動(dòng)阻力損失。熱導(dǎo)率高?？梢蕴岣邠Q熱器的傳熱系數(shù)，減少換熱設(shè)備的傳熱面積降低材料消耗。不燃燒，不，無毒。對(duì)金屬材料不腐蝕，對(duì)潤滑油不發(fā)生化學(xué)作用，高溫下不分解。等熵指數(shù)小?？山档团艢鉁囟?，減少壓縮過程耗功，有利安全運(yùn)行和提高使用壽命。凝固溫度低。避免在蒸發(fā)溫度下出現(xiàn)凝固。具有良好的絕緣性能。價(jià)格低易獲得。單位容積壓縮功小。目前，完全滿足要求的制冷劑還未發(fā)現(xiàn)。但選擇時(shí)，可以根據(jù)用途使用條件等加以各方面考量。如小型封閉壓縮機(jī)家用裝置，多選用氟制冷劑。大型工業(yè)制冷多選用氨，石油化工多選用碳?xì)浠衔铩?/p><p style="text-indent:25px">R-124（一氯四氟乙烷）制冷劑物化性質(zhì)：一氯四氟乙烷CHClFCF3，HCFC-124（R124），分子量136.5，沸點(diǎn)-10.95℃，臨界溫度122.25℃，臨界壓力3.613MPa，破壞臭氧潛能值（ODP）為0.02，全球變暖潛能值(GWP，100 yr)為0.10。主要用途：HCFC-124（R124）主要用作制冷劑、滅火劑，是混合工質(zhì)的重要組分，可替代 CFC-114。產(chǎn)品包裝：鋼瓶包裝，13.6kg/瓶。 R-141b（二氯一氟乙烷）制冷劑物化性質(zhì)：二氯一氟乙烷CH3CCl2F，HCFC-141b，分子量116.95，沸點(diǎn)32.05℃，臨界溫度204.5℃，臨界壓力4.25MPa，破壞臭氧潛能值（ODP）為0.11，全球變暖潛能值(GWP，100 yr)為0.09。主要用途：該產(chǎn)品可替代 CFC-11 作硬質(zhì)聚氨酯泡沫塑料的發(fā)泡劑，替代 CFC-113 作清洗劑，也用于作制冷劑。產(chǎn)品包裝：鋼桶包裝，20kg/桶，250kg/桶。在氣體壓縮式制冷機(jī)中，使用氣體制冷劑，如空氣、氫氣、氦氣等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="大金制冷劑哪家好,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016059653764/28881.png"></div><p style="text-indent:25px">R-134a(代號(hào)：R134a）分子式： CH 2 FCF 3 （四氟乙烷），分子量：102.03，沸點(diǎn) ：-26.26℃ ，凝固點(diǎn) ：-96.6°C ，臨界溫度：101.1 ℃ ，臨界壓力：4067kpa，飽和液體密度：25℃ ， 1.207g/cm 3 ，液體比熱：25℃ ， 1.51KJ/(Kg·℃)，溶解度( 水中， 25℃ ) ：0.15% ，臨界密度：0.512g/cm3，破壞臭氧潛能值（ ODP ）：0 ，全球變暖系數(shù)值（ GWP ）：0.29，沸點(diǎn)下蒸發(fā)潛能 :215 kJ/kg，質(zhì)量指標(biāo) ：純度 ≥ 99.9 % ，水份PPm≤ 0.0010，酸度 PPm≤ 0.00001 ，蒸發(fā)殘留物PPm≤ 0.01，R134a作為R12的替代制冷劑，它的許多特性與R12很相像。R134a的毒性非常低，在空氣中不可燃，安全類別為A1，是很安全的制冷劑。制冷劑需具有良好的化學(xué)穩(wěn)定性。東岳R410A</p><p style="text-indent:25px">氨作為制冷劑幾乎不溶解于油、流動(dòng)阻力小，泄漏時(shí)易發(fā)現(xiàn)。大金制冷劑哪家好</p><p style="text-indent:25px">應(yīng)用非共沸混合工質(zhì)單級(jí)壓縮可得到很低的蒸發(fā)溫度，且可增加制冷量，減少功耗。它的性質(zhì)直接關(guān)系到制冷裝置的制冷效果、經(jīng)濟(jì)性、安全性及運(yùn)行管理，因而對(duì)制冷劑性質(zhì)要求的了解是不容忽視的。十九世紀(jì)中葉出現(xiàn)了機(jī)械制冷。雅各布.帕金斯（Jacob Perkins）在1834年建造了首臺(tái)實(shí)用機(jī)器。它用做制冷劑，是一種蒸氣壓縮系統(tǒng)。二氧化碳(CO2) 和氨(NH3)分別在1866年和1873年首先被用作制冷劑。其他化學(xué)制品包括化學(xué)氰（石油醚和石腦油）、二氧化硫(R-764)和甲醚，曾被作為蒸氣壓縮用制冷劑。其應(yīng)用限于工業(yè)過程。大金制冷劑哪家好</p><p style="text-indent:25px">上海冰仆冷暖設(shè)備有限公司致力于化工，是一家貿(mào)易型公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下制冷劑廠家直銷，冷凍油廠家直銷，壓縮機(jī)批發(fā)銷售，制冷配件批發(fā)銷售深受客戶的喜愛。公司從事化工多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。冰仆冷暖設(shè)備秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營理念，全力打造公司的重點(diǎn)競(jìng)爭(zhēng)力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2671073.html</p></div></div></div></div></div><div id="uyldfm3" class="page-right twoColRt"><div id="zdax77x" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="vkhewn7" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" 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