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一、凍干機的價格是多少

凍干機也稱為真空冷凍干燥機，是對物料進行真空冷凍，使其干燥的機器，它的應用領域廣泛，有醫用制藥凍干機、食品凍干機、實驗室凍干機等多種。凍干機的價格受到多方面因素的影響，一般凍干機的價格主要與凍干面積有關，凍干面積越大，凍干的量也越大，價格也自然上去，另外，凍干機的功能、型號、參數配置、品牌、種類等也會影響到其價格。小型的凍干機一般在兩萬元一臺左右，批量生產用的大型凍干機，其價格從十幾萬到百萬元都有。如果您需要選購凍干機的話，可以先來了解一下凍干機十大品牌。

二、凍干機原理介紹

凍(dong)(dong)(dong)(dong)(dong)干(gan)機(ji)全稱是冷(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)燥(zao)(zao)機(ji)，由(you)制冷(leng)系(xi)統(tong)(tong)、真空(kong)系(xi)統(tong)(tong)、加(jia)熱系(xi)統(tong)(tong)、電器儀表控(kong)制系(xi)統(tong)(tong)所組成，主(zhu)要(yao)部件為干(gan)燥(zao)(zao)箱、凝結(jie)(jie)器、冷(leng)凍(dong)(dong)(dong)(dong)(dong)機(ji)組、真空(kong)泵、加(jia)熱/冷(leng)卻裝置等，工作時，它(ta)主(zhu)要(yao)利用(yong)的是升(sheng)華的原(yuan)理，將被干(gan)燥(zao)(zao)的物品先凍(dong)(dong)(dong)(dong)(dong)結(jie)(jie)到三相點溫度以下(xia)，然后在(zai)真空(kong)條件下(xia)使(shi)物品中(zhong)的固態水(shui)份（冰）直接(jie)升(sheng)華成水(shui)蒸(zheng)氣(qi)，從物品中(zhong)排(pai)除，使(shi)物品干(gan)燥(zao)(zao)。真空(kong)凍(dong)(dong)(dong)(dong)(dong)干(gan)機(ji)的凍(dong)(dong)(dong)(dong)(dong)干(gan)分為三個(ge)過程(cheng)(cheng)：（1）預凍(dong)(dong)(dong)(dong)(dong)，為接(jie)下(xia)來的升(sheng)華過程(cheng)(cheng)準(zhun)備(bei)樣品。（2）初級(ji)干(gan)燥(zao)(zao)，在(zai)此過程(cheng)(cheng)中(zhong)，冰升(sheng)華而不融化。（3）次級(ji)干(gan)燥(zao)(zao)，在(zai)此過程(cheng)(cheng)中(zhong)，鍵和于固體物質的殘留水(shui)分被除去(qu)，從而留下(xia)干(gan)燥(zao)(zao)樣品，完成凍(dong)(dong)(dong)(dong)(dong)干(gan)。

三、凍干機的使用方法

1、將待凍干的樣品在冰箱中凍好，同時應預先用封口膜或保鮮膜封好瓶口，并扎好小孔。2、開(kai)(kai)機(ji)前檢查（電源、真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)等）：（1）真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)置于地面(mian)，與主機(ji)保持一定高(gao)度差。防止(zhi)突(tu)發停電產(chan)生返(fan)油(you)(you)。若(ruo)發生停電事故，應立(li)即擰(ning)開(kai)(kai)充(chong)氣(qi)閥充(chong)氣(qi)，盡快(kuai)取(qu)出(chu)(chu)樣(yang)品。（2）真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)油(you)(you)應該定期更換，注(zhu)意(yi)保養和維(wei)護。油(you)(you)量(liang)通(tong)過(guo)玻璃窗(chuang)口來觀察，最(zui)好(hao)控制在2/3左右，過(guo)多(duo)容(rong)易出(chu)(chu)現(xian)噴油(you)(you)現(xian)象，過(guo)少容(rong)易出(chu)(chu)現(xian)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)度不(bu)足。3、打開(kai)(kai)電源總(zong)開(kai)(kai)關(guan)，按(an)(an)“制冷(leng)”鍵(jian)，儀器使(shi)用(yong)前需(xu)要制冷(leng)半小時(shi)。4、將待(dai)凍(dong)干的(de)樣(yang)品從冰箱(xiang)中取(qu)出(chu)(chu)放好(hao)，扣上(shang)有機(ji)玻璃罩，檢查“○”型(xing)圈(quan)是否密封好(hao)。然后(hou)(hou)按(an)(an)下充(chong)氣(qi)閥上(shang)的(de)不(bu)銹(xiu)鋼片，拔出(chu)(chu)小管(guan)將儀器密封。5、按(an)(an)“真(zhen)(zhen)(zhen)空(kong)(kong)(kong)計”鍵(jian)，真(zhen)(zhen)(zhen)空(kong)(kong)(kong)度顯示(shi)；再按(an)(an)“真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)”鍵(jian)，真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)工(gong)作。6、凍(dong)干結束(shu)后(hou)(hou)，首先擰(ning)開(kai)(kai)充(chong)氣(qi)閥充(chong)氣(qi)，使(shi)空(kong)(kong)(kong)氣(qi)緩慢(man)進入(ru)，然后(hou)(hou)再關(guan)閉真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)，防止(zhi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)返(fan)油(you)(you)。再關(guan)閉真(zhen)(zhen)(zhen)空(kong)(kong)(kong)計、制冷(leng)按(an)(an)鈕和總(zong)電源。最(zui)后(hou)(hou)取(qu)下有機(ji)玻璃罩，將樣(yang)品取(qu)出(chu)(chu)保存。7、最(zui)后(hou)(hou)將凍(dong)干機(ji)冷(leng)阱內的(de)冰塊清理掉，方(fang)便(bian)下次使(shi)用(yong)。

四、凍干機凍干需要多久

冷(leng)凍干(gan)(gan)燥(zao)(zao)機的整個凍干(gan)(gan)過(guo)程(cheng)都(dou)是(shi)在(zai)低(di)溫(wen)低(di)壓環境下進行的，是(shi)一(yi)(yi)個由低(di)溫(wen)逐漸緩慢升(sheng)溫(wen)的過(guo)程(cheng)，如果(guo)升(sheng)溫(wen)過(guo)快(kuai)、溫(wen)度過(guo)高，容(rong)易導致最終凍干(gan)(gan)產品外觀崩塌、品相不(bu)佳，凍干(gan)(gan)過(guo)程(cheng)分為：預凍、升(sheng)華干(gan)(gan)燥(zao)(zao)、解析干(gan)(gan)燥(zao)(zao)等(deng)三個階段(duan)，一(yi)(yi)般(ban)正常情(qing)況下需要24小(xiao)時(shi)左右，具體(ti)凍干(gan)(gan)產品不(bu)同，凍干(gan)(gan)所需要的時(shi)間也有所不(bu)同，如果(guo)是(shi)結晶點低(di)的生(sheng)物(wu)制品，一(yi)(yi)般(ban)需要三十幾個小(xiao)時(shi)。