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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>杭州高效制冷劑,制冷劑</p><p><span>***更新：</span>2021-01-25 00:25:54</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="2ismgow" 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="acy2wum" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="myc4cww" class="box"><p><p style="text-indent:25px">在小型氟利昂制冷裝置中不設(shè)分油器，而裝設(shè)干燥器。同時(shí)規(guī)定R12中含水量不得大于0.0025%，系統(tǒng)中不能用一般天然橡膠作密封墊片，杭州高效制冷劑，而應(yīng)采用丁腈橡膠或氯乙醇等人造橡膠。否則，會(huì)造成密封墊片的膨脹引起制冷劑的泄漏。R22也是烷烴的鹵代物，學(xué)名二氟一氯甲烷，分子式為CHClF2，標(biāo)準(zhǔn)蒸發(fā)溫度約為－41℃，凝固溫度約為－160℃，冷凝壓力同氨相似，單位容積標(biāo)準(zhǔn)制冷量約為454kcal/m3。R22的許多性質(zhì)與R12相似，但化學(xué)穩(wěn)定性不如R12，毒性也比R12稍大。但是，杭州高效制冷劑，杭州高效制冷劑，R22的單位容積制冷量卻比R12大的多，接近于氨。當(dāng)要求－40～－70℃的低溫時(shí)，利用R22比R12適宜，故目前R22被較廣應(yīng)用于－40～－60℃的雙級壓縮或空調(diào)制冷系統(tǒng)中。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)。杭州高效制冷劑</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州高效制冷劑,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016028022792/6122002.png"></div><p style="text-indent:25px">制冷劑冷卻法回收：使制冷劑蒸氣冷卻液化，可使用干冰等使制冷劑冷卻，液化后回收，此法適宜于干凈的制冷劑。冷卻法有一套**的冷凍循環(huán)系統(tǒng)，回收容器內(nèi)的制冷劑在蒸發(fā)器中冷凝成液體。從汽車空調(diào)系統(tǒng)排出的制冷劑通過過濾干燥器，除去水分和雜質(zhì)；通過分油器除去制冷劑中的潤滑油，進(jìn)入回收容器。對于制冷劑純度要求不太嚴(yán)格的場合，被回收的制冷劑可重新加注到制冷系統(tǒng)。真空檢漏：用真空泵進(jìn)行，真空度應(yīng)達(dá)到0.1MPa，保持24h內(nèi)真空度沒有明顯升高即可。抽真空用于抽出系統(tǒng)中殘留的氮?dú)?、檢查系統(tǒng)有無泄漏以及使系統(tǒng)干燥。只有在系統(tǒng)抽真空后才能加注制冷劑。外觀檢漏：制冷劑泄漏部位往往會(huì)滲出冷凍潤滑油，若發(fā)現(xiàn)在某處有油污滲出，可進(jìn)一步用清潔的白紙擦拭或用手直接觸摸檢查。如仍有油冒出，則可能有泄漏。上海梅蘭制冷劑供應(yīng)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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州高效制冷劑,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016165923170/7418519.png"></div><p style="text-indent:25px">液氨制冷劑透明無色，氨蒸氣無色，有強(qiáng)烈的刺激臭味。氨對人體有較大的毒性，當(dāng)氨液飛濺到皮膚上時(shí)會(huì)引起凍著。當(dāng)空氣中氨蒸氣的容積達(dá)到0.5-0.6%時(shí)可引起。故機(jī)房內(nèi)空氣中氨的濃度不得超過0.02mg/L。氨在常溫下不易燃燒，加熱至350℃時(shí)，分解為氮和氫氣，氫氣與空氣中的氧氣混合后會(huì)發(fā)生。與空氣混合的體積分?jǐn)?shù)在11%-14%時(shí)即可燃燒。在16%-25%時(shí)遇明火可能。在0.5%-0.6%時(shí)，人在其中停留半小時(shí)就會(huì)中毒。氨極溶于水，0℃時(shí)每升水能溶解130升氨氣。一般規(guī)定液氨中含水量低于0.2%。</p><p style="text-indent:25px">二十世紀(jì)初，制冷系統(tǒng)開始作為大型建筑的空氣調(diào)節(jié)手段。位于德克薩斯圣安東尼奧的梅蘭大廈是首先個(gè)全空調(diào)高層辦公樓。1926年，托馬斯.米奇尼（Thomas Midgely）開發(fā)了首臺CFC（氯氟碳）機(jī)器，使用R-12. CFC族（氯氟碳）不可燃、無毒（和二氧化硫相比時(shí)）并且能效高。該機(jī)器于1931年開始商業(yè)生產(chǎn)并很快進(jìn)入家用。威利斯.開利（Willis Carrier）開發(fā)了首先臺商用離心式制冷機(jī)，開創(chuàng)了制冷和空調(diào)的紀(jì)元。20世紀(jì)30年代，一系列鹵代烴制冷劑相繼出現(xiàn)，杜邦公司將其命名為氟利昂（Freon）。制冷劑在南方一些地區(qū)俗稱雪種。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州高效制冷劑,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016214117354/9845773.png"></div><p style="text-indent:25px">氨的比重和粘度小，放熱系數(shù)高，價(jià)格便宜，易于獲得。但是，氨有較強(qiáng)的毒性和可燃性。若以容積計(jì)，當(dāng)空氣中氨的含量達(dá)到0.5%～0.6%時(shí)，人在其中停留半個(gè)小時(shí)即可中毒，達(dá)到11%～13%時(shí)即可點(diǎn)燃，達(dá)到16%時(shí)遇明火就會(huì)。因此，氨制冷機(jī)房必須注意通風(fēng)排氣，并需經(jīng)常冰箱排除系統(tǒng)中的空氣及其它不凝性氣體?？偵纤?，氨作為制冷劑的優(yōu)點(diǎn)是：易于獲得、價(jià)格低廉、壓力適中、單位制冷量大、放熱系數(shù)高、幾乎不溶解于油、流動(dòng)阻力小，泄漏時(shí)易發(fā)現(xiàn)。其缺點(diǎn)是：有刺激性臭味、有毒、可以燃燒和，對銅及銅合金有腐蝕作用。在吸收式制冷機(jī)中，使用由吸收劑和制冷劑組成的二元溶液作為工質(zhì)，如氨和水、溴化鋰和水等；杭州高效制冷劑</p><p style="text-indent:25px">60年代開始使用非共沸制冷劑。杭州高效制冷劑</p><p style="text-indent:25px">通常按照制冷劑的標(biāo)準(zhǔn)蒸發(fā)溫度，又分為高、中、低溫三類。標(biāo)準(zhǔn)蒸發(fā)溫度是指標(biāo)準(zhǔn)大氣壓力下的蒸發(fā)溫度，也就是沸點(diǎn)。（1）高溫（低壓）：標(biāo)準(zhǔn)蒸發(fā)溫度（tS）>0℃,冷凝壓力(PC)≦0.2～0.3Mpa,常用的R123等。（2）中溫（中壓）：0℃>tS>-60℃，0.3Mpa<2.0Mpa,常用的有氨，R12,R22,R134a,丙烷等。（3）低溫（高壓）：tS≦-60℃，常用的有R13，乙烯,R744(CO2)等。編號，命各標(biāo)示方法;按照國際統(tǒng)一規(guī)定用字母“R”表示制冷劑，加上后面的數(shù)字和字母組成在GB7778-1987中做了明確規(guī)定。無機(jī)化合物。規(guī)定為R700加上無機(jī)化合物的相對分子質(zhì)量的整數(shù)部分組成，NH3(氨)H2O（水）CO2（二氧化碳）分子量171844；編號R717R718R744。杭州高效制冷劑</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。公司業(yè)務(wù)涵蓋制冷劑廠家直銷，冷凍油廠家直銷，壓縮機(jī)批發(fā)銷售，制冷配件批發(fā)銷售等，價(jià)格合理，品質(zhì)有保證。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競爭力，努力學(xué)習(xí)行業(yè)知識，遵守行業(yè)規(guī)范，植根于化工行業(yè)的發(fā)展。冰仆冷暖設(shè)備憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2993233.html</p></div></div></div></div></div><div id="mykos2y" class="page-right twoColRt"><div id="agsgcau" class="box01 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