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id="f3oppvm" class="proBig"><div id="qdfhof3" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/bingpu/637401016050288421/7102759.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="o7ipbrn" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/bingpu/637401016050288421/7102759.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8a8jqsj" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>產品關鍵詞：</span>浙江大金制冷劑一般加多少,制冷劑</p><p><span>***更新：</span>2021-01-05 02:15:23</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="8sgcjef" 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>網址: </span>https://www.shbpln.com</p><p><span>手機: </span>1-1</p><p><span>地址: </span>美丹路222號629室</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="b98pgce" class="page-proshow02"><p class="title">詳細說明</p><div id="372ievb" class="box"><p><p style="text-indent:25px">應用非共沸混合工質單級壓縮可得到很低的蒸發(fā)溫度，浙江大金制冷劑一般加多少，且可增加制冷量，減少功耗。它的性質直接關系到制冷裝置的制冷效果、經濟性、安全性及運行管理，浙江大金制冷劑一般加多少，因而對制冷劑性質要求的了解是不容忽視的。十九世紀中葉出現(xiàn)了機械制冷。雅各布.帕金斯（Jacob Perkins）在1834年建造了首臺實用機器。它用做制冷劑，浙江大金制冷劑一般加多少，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。其他化學制品包括化學氰（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。其應用限于工業(yè)過程。制冷劑在較高溫度下轉移給冷卻水或空氣。浙江大金制冷劑一般加多少</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江大金制冷劑一般加多少,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016050288421/7102759.png"></div><p style="text-indent:25px">常用制冷劑性質：（1）氨：標準蒸發(fā)溫度為-33.4℃，凝固溫度為-77.7℃，壓力適中，單位容積制冷量大，流動阻力小，熱導率大。價格低廉對大氣臭氧層無破壞作用，故被較廣應用在蒸發(fā)溫度-65℃以上的大中型制冷機中。缺點是毒性較大，可燃，可爆，有強烈刺激性臭味，等熵指數(shù)較大，對鋅銅有腐蝕作用。（2）氟利昂：重點分析熱水器發(fā)文時常用的，1）R22：對大氣臭氧層有輕微破壞作用，并產生溫室效應，被列為第二批限用禁用的制冷劑。我國將在2040年1月1日起禁止生產和使用。R22是應用較較廣的中溫制冷劑，沸點-40.8℃，凝固點-160℃，無色，氣味弱，不燃燒，不，屬安全制冷劑。它與潤滑油部分互溶，需采取回油措施。上海東岳制冷劑費用要求制冷劑在高溫下具有良好的化學穩(wěn)定性，保證在較高工作溫度下工質不發(fā)生分解。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江大金制冷劑一般加多少,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016807993791/1268610.png"></div><p style="text-indent:25px">新的解決方案是開發(fā)HFC族，來擔當制冷劑的主要角色。HCFC族作為過渡方案繼續(xù)使用并將逐漸淘汰。在1990年代，全球變暖對地球生命構成了新的威脅。雖然全球變暖的因素很多，但因為空調和制冷耗能巨大（美國建筑物耗能約占總能耗的1/3），且許多制冷劑本身就是溫室氣體，制冷劑又被列入了討論范圍。雖然ASHRAE標準34把許多物質分類為制冷劑，但只有少部分用于商業(yè)空調。1985年2月英國南極考察隊隊長發(fā)曼（J.Farman)首先報道，從1977年起就發(fā)現(xiàn)南極洲上空的臭氧總量在每年9月下旬開始迅速減少一半左右，形成“臭氧洞”持續(xù)到11月逐漸恢復，引起世界性的震驚。</p><p style="text-indent:25px">R-134a(代號：R134a）分子式： CH 2 FCF 3 （四氟乙烷），分子量：102.03，沸點：-26.26℃ ，凝固點：-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，沸點下蒸發(fā)潛能 :215 kJ/kg，質量指標：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。R404A是不破壞大氣臭氧層的環(huán)保制冷劑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江大金制冷劑一般加多少,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016040376295/9954917.png"></div><p style="text-indent:25px">制冷劑物質性能優(yōu)良、無毒、不燃，能適應不同的溫度區(qū)域，明顯地改善了制冷機的性能。幾種制冷劑在空調中變得很普遍，包括CFC-11.CFC-12. CFC-113.CFC-114和HCFC-22.20世紀50年代的，開始使用共沸制冷劑。60年代開始使用非共沸制冷劑。空調工業(yè)從幼小成長為幾十億美元的產業(yè)，使用的都是以上幾種制冷劑。到1963年,這些制冷劑占到整個有機氟工業(yè)產量的98%。到1970年代中期，對臭氧層變薄的關注浮出水面，CFC族物質可能要承擔部分責任。這導致了1987年蒙特利爾議定書的通過，議定書要求淘汰CFC和HCFC族。碳氫制冷劑屬于天然工質，因此對大氣無污染、對臭氧層無破壞和溫室效應幾乎為零。上海常用制冷劑生產廠家</p><p style="text-indent:25px">新的解決方案是開發(fā)HFC族，來擔當制冷劑的主要角色。浙江大金制冷劑一般加多少</p><p style="text-indent:25px">制冷劑不足的表現(xiàn)：①氣管閥門發(fā)干，用手觸摸沒有明顯的涼感。其原因是制冷劑不足導致蒸發(fā)器內的沸騰終結點提前，使該閥的制冷劑過熱度增大，閥門的溫度升高，大于室外空氣的**溫度。②液管閥門結霜。其原因是制冷劑不足導致液管內壓力下降，沸點降低，使閥門溫度低于冰點。③打開室內機面板，取下過濾網，可發(fā)現(xiàn)部分蒸發(fā)器結露或結霜。其原因是由于制冷劑不足，*使部分蒸發(fā)器發(fā)生了沸騰吸熱，使制冷面積相應減少；④室外機排風沒有熱感。其原因是制冷劑不足導致冷凝壓力、冷凝溫度都降低，排風溫度也降低。⑤排水軟管排水斷斷續(xù)續(xù)或根本不排水。其原因是蒸發(fā)器制冷面積減少，結露面積也減少，凝結水量降低。⑥室外機氣、液閥門有油污，有油污就有泄漏。其原因是制冷劑與冷凍油有一定的互溶性，氟從漏點逸出后進人大氣中，而油附著在漏點周圍。⑦測量空調器的工作電流小于額定電流。其原因是制冷劑不足而使壓縮機工作負荷減少，電流下降。⑧從室外機充氟口測量的壓力低于0.45Mpa。其原因是制冷劑不足導致了蒸發(fā)壓力下降。浙江大金制冷劑一般加多少</p><p style="text-indent:25px">上海冰仆冷暖設備有限公司是一家銷售:制拎設備、化工產品(除危險化學品、監(jiān)控化學品、煙花爆竹、民用物品、易制毒化學品)、儀器儀表、汽車配件，機械配件、五金電器、焊接工具。銷售:制拎設備、化工產品(除危險化學品、監(jiān)控化學品、煙花爆竹、民用物品、易制毒化學品)、儀器儀表、汽車配件，機械配件、五金電器、焊接工具。的公司，是一家集研發(fā)、設計、生產和銷售為一體的專業(yè)化公司。冰仆冷暖設備作為銷售:制拎設備、化工產品(除危險化學品、監(jiān)控化學品、煙花爆竹、民用物品、易制毒化學品)、儀器儀表、汽車配件，機械配件、五金電器、焊接工具。銷售:制拎設備、化工產品(除危險化學品、監(jiān)控化學品、煙花爆竹、民用物品、易制毒化學品)、儀器儀表、汽車配件，機械配件、五金電器、焊接工具。的企業(yè)之一，為客戶提供良好的制冷劑廠家直銷，冷凍油廠家直銷，壓縮機批發(fā)銷售，制冷配件批發(fā)銷售。冰仆冷暖設備不斷開拓創(chuàng)新，追求出色，以技術為先導，以產品為平臺，以應用為重點，以服務為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務。冰仆冷暖設備創(chuàng)始人徐佳華，始終關注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2706054.html</p></div></div></div></div></div><div id="m8bc8hy" class="page-right twoColRt"><div id="d4q2sbq" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="jndugxo" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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