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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(chǎn)品關(guān)鍵詞：</span>杭州科慕制冷劑有哪些,制冷劑</p><p><span>***更新：</span>2020-12-11 07:23:41</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="96akj2e" 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: </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="kih4h4h" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="yxhr4cn" class="box"><p><p style="text-indent:25px">制冷劑選擇具體要求：單位容積制冷量大。可以減少壓縮機輸氣量。粘度和密度小。減少系統(tǒng)中流動阻力損失。熱導(dǎo)率高?？梢蕴岣邠Q熱器的傳熱系數(shù)，杭州科慕制冷劑有哪些，減少換熱設(shè)備的傳熱面積降低材料消耗。不燃燒，不，無毒。對金屬材料不腐蝕，杭州科慕制冷劑有哪些，杭州科慕制冷劑有哪些，對潤滑油不發(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，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Ｆ渌瘜W(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。杭州科慕制冷劑有哪些</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州科慕制冷劑有哪些,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016725513045/6297146.png"></div><p style="text-indent:25px">我國冷藏企業(yè)中，尤其是中小企業(yè)，許多未配備針對氨制冷劑的防護(hù)設(shè)備，缺乏有關(guān)制冷系統(tǒng)故障的應(yīng)急處理預(yù)案。冷庫安全問題必須引起企業(yè)和管理部門的高度重視。在國內(nèi)外大中型冷庫中，目前采用氨制冷劑是主流，今后氨仍然將是主要制冷劑。采用氨制冷劑關(guān)鍵是安全問題，應(yīng)該采取足夠的防護(hù)措施，保證操作人員安全和公共安全。根據(jù)國外**的評估，在蒸發(fā)溫度-35℃以上，壓縮式制冷采用氨制冷劑是較節(jié)能的。蒸發(fā)溫度在-35℃以下，采用CO2與氨復(fù)疊式制冷，不僅可以降低初次投入、提高效率，而且較大減少了系統(tǒng)的充氨量、提高了食品冷加工企業(yè)的安全系數(shù)。上海金冷制冷劑企業(yè)R404A 制冷劑具有清潔、低毒、不燃、制冷效果好等特點，大量用于中低溫冷凍系統(tǒng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州科慕制冷劑有哪些,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401017488677598/4582002.png"></div><p style="text-indent:25px">R-134a制冷劑別名R134a、HFC134a、HFC-134a、四氟乙烷，商品名稱有SUVA 134a、Genetron 134a、KLEA 134a等，中文名稱四氟乙烷，英文名稱1,1,1,2-tetrafluoroethane，化學(xué)名1,1,1,2-- 四氟乙烷，分子式CH2FCF3。由于R-134a屬于HFC類物質(zhì)（非ODS物質(zhì)Ozone-depleting Substances）——因此完全不破壞臭氧層，是當(dāng)前世界絕大多數(shù)的各國認(rèn)可并推薦使用的環(huán)保制冷劑，也是目前主流的環(huán)保制冷劑，較廣用于新制冷空調(diào)設(shè)備上的初裝和維修過程中的再添加。R-134a作為使用較較廣的中低溫環(huán)保制冷劑，由于HFC-134a 良好的綜合性能，使其成為一種非常有效和安全的CFC-12的替代品，主要應(yīng)用于在使用 R-12（R12、氟利昂12、F-12、CFC-12、Freon 12、二氯二氟甲烷）制冷劑的多數(shù)領(lǐng)域</p><p style="text-indent:25px">制冷劑飽和蒸氣的溫度與壓力呈對應(yīng)關(guān)系，若已知制冷劑的蒸發(fā)溫度即可查出相對應(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℃時相應(yīng)相對壓力值為0.53Mpa(5.3kg/cm2)和54.5℃時的相應(yīng)相對壓力值為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。壓力測定法較為簡便，在維修時經(jīng)常作用，但是缺點是比較粗，準(zhǔn)確度不高。目前使用的制冷劑已達(dá)70～80種，并正在不斷發(fā)展增多。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="杭州科慕制冷劑有哪些,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016836011058/5056076.png"></div><p style="text-indent:25px">制冷劑的排放一般指直接把制冷劑排放到空氣中，排放時，周圍環(huán)境一定要通風(fēng)良好，不能接近明火，否則要產(chǎn)生有毒氣體。1，關(guān)閉歧管壓力計上的高，低壓手動閥，連接其高，低壓軟管分別接在壓縮機高，低壓檢修閥上，中間管的自由端放在工作擦布上。2，慢慢打開高壓手動閥，讓制冷劑從中間軟管上排出，閥門不能開得太大，否則壓縮機內(nèi)的冷凍潤滑油會隨制冷劑替代。3，當(dāng)壓力表讀數(shù)降到0.35MPa以下時，再慢慢打開手動閥，使制冷劑從高，低壓雙向同時排出。4，觀察壓力表讀數(shù)，隨著壓力下降，逐漸開大高，低壓手動閥，直至高，低壓表的讀數(shù)指示為零。制冷劑是制冷機中完成熱力循環(huán)的工質(zhì)。上海金冷制冷劑企業(yè)</p><p style="text-indent:25px">制冷劑氣體在制冷循環(huán)中始終為氣態(tài)；杭州科慕制冷劑有哪些</p><p style="text-indent:25px">液氨制冷劑透明無色，氨蒸氣無色，有強烈的刺激臭味。氨對人體有較大的毒性，當(dāng)氨液飛濺到皮膚上時會引起凍著。當(dāng)空氣中氨蒸氣的容積達(dá)到0.5-0.6%時可引起。故機房內(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，分解為氮和氫氣，氫氣與空氣中的氧氣混合后會發(fā)生。與空氣混合的體積分?jǐn)?shù)在11%-14%時即可燃燒。在16%-25%時遇明火可能。在0.5%-0.6%時，人在其中停留半小時就會中毒。氨極溶于水，0℃時每升水能溶解130升氨氣。一般規(guī)定液氨中含水量低于0.2%。杭州科慕制冷劑有哪些</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。冰仆冷暖設(shè)備致力于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，一切以用戶需求為中心，深受廣大客戶的歡迎。公司秉持誠信為本的經(jīng)營理念，在化工深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點，發(fā)揮人才優(yōu)勢，打造化工良好品牌。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/2359081.html</p></div></div></div></div></div><div id="v6rtlo1" class="page-right twoColRt"><div id="cxscqeh" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="s6vuah6" 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" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="b4tznxs" class="recomPic likePro"><a 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