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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>江蘇大金制冷劑價(jià)格,制冷劑</p><p><span>***更新：</span>2020-12-06 05:23:41</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="ji73x2z" 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="zdkbd3j" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qkw7hkg" class="box"><p><p style="text-indent:25px">認(rèn)為較有前途的R22潛代品為R407c和R410A。R407c是R32R125R134a以23：25：52的質(zhì)量百分比組成的三元非共沸制冷劑，蒸發(fā)壓力和制冷壓力與R22非常接近。但在制熱工況下單位容積制冷量和COP都小于R22。在相同設(shè)計(jì)運(yùn)行能力的熱泵熱水系統(tǒng)中，采用R407c熱水加熱系統(tǒng)耗功明顯高于R22系統(tǒng)。使得在高水溫時(shí)COP低于R22系統(tǒng)。R410A是R32和R125按照50：50的質(zhì)量百分比組成的近共沸混合制冷劑。其溫度滑移不超過(guò)0.2℃，這給制冷劑充灌，設(shè)備更換提供了方便。但是R410A制熱工況下的COP比R22約小9%，其蒸發(fā)壓力，冷凝壓力以及容積制冷量都比R22大的多，同溫度下它的壓力值比R22約高60%，傳熱性能及流動(dòng)性較好。不能直接用于R22系統(tǒng)，江蘇大金制冷劑價(jià)格，江蘇大金制冷劑價(jià)格。必須重新設(shè)計(jì)壓縮機(jī)，換熱器，江蘇大金制冷劑價(jià)格，管路和系統(tǒng)。蒸汽噴射式制冷機(jī)用水作為制冷劑。江蘇大金制冷劑價(jià)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇大金制冷劑價(jià)格,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401017121470090/7870246.png"></div><p style="text-indent:25px">制冷劑性質(zhì)要求：（1）具有優(yōu)良的熱力學(xué)特性，以便能在給定的溫度區(qū)域內(nèi)運(yùn)行時(shí)有較高的循環(huán)效率。具體要求為：臨界溫度高于冷凝溫度、與冷凝溫度對(duì)應(yīng)的飽和壓力不要太高、標(biāo)準(zhǔn)沸點(diǎn)較低、流體比熱容小、制冷劑絕熱指數(shù)低、單位容積制熱量較大等。（2）具有優(yōu)良的熱物理性能具體要求為：較高的傳熱系數(shù)、較低的粘度及較小的密度。（3）具有良好的化學(xué)穩(wěn)定性要求工質(zhì)在高溫下具有良好的化學(xué)穩(wěn)定性，保證在較高工作溫度下工質(zhì)不發(fā)生分解。（4）與潤(rùn)滑油有良好互溶性。（5）安全性工質(zhì)應(yīng)無(wú)毒、無(wú)刺激性、無(wú)燃燒性及性。江蘇液態(tài)制冷劑工廠制冷劑性能優(yōu)良、無(wú)毒、不燃，能適應(yīng)不同的溫度區(qū)域，明顯地改善了制冷機(jī)的性能。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇大金制冷劑價(jià)格,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401017496743481/4527677.png"></div><p style="text-indent:25px">制冷劑充入量的準(zhǔn)確判斷方法：測(cè)重量。在充注氟利昂時(shí),事先準(zhǔn)備一個(gè)小臺(tái)秤，將制冷劑鋼瓶放入一個(gè)容器中，再在容器中注入40℃以下的冷水(適用于空調(diào)器的低壓充注制冷劑蒸汽)。充注前記下鋼瓶、溫水及容器的重量，在充注過(guò)程中注意觀察指針。當(dāng)鋼瓶?jī)?nèi)制冷劑的減少量等于所需要的充注量時(shí)可停止充注。測(cè)工作電流。用鉗型電流表測(cè)工作電流，制冷時(shí)，環(huán)境溫度35℃，所測(cè)得的工作電流與銘牌上電流相對(duì)應(yīng)。溫度越高，電流相應(yīng)增大，溫度越低電流相應(yīng)減少。在風(fēng)機(jī)正常、兩器散熱號(hào)的情況下按空調(diào)器工況測(cè)電流值作比較。</p><p style="text-indent:25px">氨制冷裝置中不能使用銅及銅合金材料，并規(guī)定氨中含水量不應(yīng)超過(guò)0.2%。氨的臨界溫度較高（tkr=132℃），汽化潛熱大，在大氣壓力下為1164KJ/Kg，標(biāo)準(zhǔn)工況下的單位容積制冷量也大，氨壓縮機(jī)尺寸可以較小。純氨對(duì)潤(rùn)滑油無(wú)不良影響，但有水分時(shí)，會(huì)降低冷凍油的潤(rùn)滑作用。氨在潤(rùn)滑油中不易溶解，故要在裝置中設(shè)置油分離器，減少潤(rùn)滑油進(jìn)入冷凝器和蒸發(fā)器，防止熱交換表面被油污染后傳熱性能降低。純氨對(duì)鋼鐵無(wú)腐蝕作用，但當(dāng)氨中含有水分時(shí)將腐蝕銅和銅合金（磷青銅除外），故在氨制冷系統(tǒng)中對(duì)管道及閥件均不采用銅和銅合金。20世紀(jì)30年代，一系列鹵代烴制冷劑相繼出現(xiàn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇大金制冷劑價(jià)格,制冷劑" src="https://tyunfile.71360.com/UploadFile/bingpu/637401016667544935/4494992.png"></div><p style="text-indent:25px">R134a的化學(xué)穩(wěn)定性很好，然而由于它的溶水性比R22高，所以對(duì)制冷系統(tǒng)不利，即使有少量水分存在，在潤(rùn)滑油等的作用下，將會(huì)產(chǎn)生酸、二氧化碳或一氧化碳，將對(duì)金屬產(chǎn)生腐蝕作用，或產(chǎn)生“鍍銅”作用，所以R134a對(duì)系統(tǒng)的干燥和清潔要求更高。R134a對(duì)鋼、鐵、銅、鋁等金屬未發(fā)現(xiàn)有相互制冷劑化學(xué)反應(yīng)的現(xiàn)象，*對(duì)鋅有輕微的作用。R134a 是目前國(guó)際公認(rèn)的替代 CFC-12 的主要制冷工質(zhì)之一，常用于車用空調(diào)，商業(yè)和工業(yè)用制冷系統(tǒng)，以及作為發(fā)泡劑用于硬塑料保溫材料生產(chǎn)，也可以用來(lái)配置其他混合致冷劑，如 R 404a 和 R 407c 等。R404A 制冷劑具有清潔、低毒、不燃、制冷效果好等特點(diǎn)，大量用于中低溫冷凍系統(tǒng)。江蘇大金制冷劑價(jià)格</p><p style="text-indent:25px">制冷劑需具有優(yōu)良的熱物理性能。江蘇大金制冷劑價(jià)格</p><p style="text-indent:25px">液氨制冷劑透明無(wú)色，氨蒸氣無(wú)色，有強(qiáng)烈的刺激臭味。氨對(duì)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?jī)?nèi)空氣中氨的濃度不得超過(guò)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%。江蘇大金制冷劑價(jià)格</p><p style="text-indent:25px">上海冰仆冷暖設(shè)備有限公司位于美丹路222號(hào)629室。公司業(yè)務(wù)分為制冷劑廠家直銷，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，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，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(lái)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(lái)源地址: http://www.cdcfah.com/cp/2286815.html</p></div></div></div></div></div><div id="thtfm8d" class="page-right twoColRt"><div id="hwo8ns3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div 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