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)干(gan)(gan)機全稱(cheng)是(shi)冷凍(dong)(dong)干(gan)(gan)燥(zao)機,由制(zhi)冷系(xi)統(tong)、真(zhen)空(kong)(kong)系(xi)統(tong)、加熱系(xi)統(tong)、電器(qi)儀表控(kong)制(zhi)系(xi)統(tong)所組(zu)(zu)成(cheng),主要部件(jian)為(wei)干(gan)(gan)燥(zao)箱、凝(ning)結器(qi)、冷凍(dong)(dong)機組(zu)(zu)、真(zhen)空(kong)(kong)泵、加熱/冷卻(que)裝(zhuang)置等,工(gong)作時(shi),它主要利(li)用(yong)的(de)(de)(de)(de)是(shi)升(sheng)(sheng)(sheng)華的(de)(de)(de)(de)原理,將被干(gan)(gan)燥(zao)的(de)(de)(de)(de)物(wu)(wu)品(pin)(pin)先(xian)凍(dong)(dong)結到三(san)相點(dian)溫度以下,然后在真(zhen)空(kong)(kong)條件(jian)下使(shi)物(wu)(wu)品(pin)(pin)中的(de)(de)(de)(de)固態水(shui)份(冰)直接升(sheng)(sheng)(sheng)華成(cheng)水(shui)蒸(zheng)氣,從物(wu)(wu)品(pin)(pin)中排(pai)除,使(shi)物(wu)(wu)品(pin)(pin)干(gan)(gan)燥(zao)。真(zhen)空(kong)(kong)凍(dong)(dong)干(gan)(gan)機的(de)(de)(de)(de)凍(dong)(dong)干(gan)(gan)分為(wei)三(san)個過(guo)程(cheng)(cheng):(1)預凍(dong)(dong),為(wei)接下來的(de)(de)(de)(de)升(sheng)(sheng)(sheng)華過(guo)程(cheng)(cheng)準備樣(yang)品(pin)(pin)。(2)初級干(gan)(gan)燥(zao),在此(ci)過(guo)程(cheng)(cheng)中,冰升(sheng)(sheng)(sheng)華而不融化。(3)次(ci)級干(gan)(gan)燥(zao),在此(ci)過(guo)程(cheng)(cheng)中,鍵和于固體物(wu)(wu)質的(de)(de)(de)(de)殘留(liu)(liu)水(shui)分被除去,從而留(liu)(liu)下干(gan)(gan)燥(zao)樣(yang)品(pin)(pin),完成(cheng)凍(dong)(dong)干(gan)(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)機(ji)前檢查(電源、真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)等):(1)真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)置(zhi)于地面,與主機(ji)保(bao)(bao)持一(yi)定(ding)高度差。防止(zhi)突(tu)發停(ting)電產生(sheng)返油。若發生(sheng)停(ting)電事(shi)故,應立即(ji)擰開(kai)充氣閥充氣,盡快取(qu)出樣品。(2)真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)油應該(gai)定(ding)期更換,注意保(bao)(bao)養和維(wei)護。油量通(tong)過(guo)玻璃窗口(kou)來觀察,最(zui)(zui)好控(kong)制(zhi)在(zai)2/3左右,過(guo)多容(rong)易出現噴油現象,過(guo)少(shao)容(rong)易出現真(zhen)(zhen)空(kong)(kong)(kong)度不足。3、打開(kai)電源總開(kai)關(guan),按(an)“制(zhi)冷(leng)”鍵(jian),儀器使用前需要制(zhi)冷(leng)半小(xiao)(xiao)時。4、將(jiang)待(dai)凍(dong)干(gan)(gan)的樣品從(cong)冰箱中(zhong)取(qu)出放好,扣上有(you)機(ji)玻璃罩,檢查“○”型(xing)圈是(shi)否密封好。然(ran)后(hou)按(an)下(xia)充氣閥上的不銹鋼片,拔出小(xiao)(xiao)管將(jiang)儀器密封。5、按(an)“真(zhen)(zhen)空(kong)(kong)(kong)計”鍵(jian),真(zhen)(zhen)空(kong)(kong)(kong)度顯示;再按(an)“真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)”鍵(jian),真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)工作。6、凍(dong)干(gan)(gan)結束后(hou),首(shou)先擰開(kai)充氣閥充氣,使空(kong)(kong)(kong)氣緩慢(man)進入,然(ran)后(hou)再關(guan)閉真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng),防止(zhi)真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)返油。再關(guan)閉真(zhen)(zhen)空(kong)(kong)(kong)計、制(zhi)冷(leng)按(an)鈕和總電源。最(zui)(zui)后(hou)取(qu)下(xia)有(you)機(ji)玻璃罩,將(jiang)樣品取(qu)出保(bao)(bao)存。7、最(zui)(zui)后(hou)將(jiang)凍(dong)干(gan)(gan)機(ji)冷(leng)阱內的冰塊清理掉(diao),方便下(xia)次使用。
四、凍干機凍干需要多久
冷凍干(gan)(gan)(gan)燥(zao)機的整個(ge)(ge)凍干(gan)(gan)(gan)過(guo)程都是(shi)在低溫(wen)低壓環境下(xia)進行(xing)的,是(shi)一個(ge)(ge)由低溫(wen)逐漸緩慢升(sheng)溫(wen)的過(guo)程,如果(guo)升(sheng)溫(wen)過(guo)快、溫(wen)度過(guo)高,容(rong)易導致最(zui)終凍干(gan)(gan)(gan)產品(pin)外觀崩(beng)塌、品(pin)相不佳,凍干(gan)(gan)(gan)過(guo)程分(fen)為:預凍、升(sheng)華(hua)干(gan)(gan)(gan)燥(zao)、解(jie)析干(gan)(gan)(gan)燥(zao)等三(san)個(ge)(ge)階段,一般正常情(qing)況下(xia)需(xu)要24小(xiao)時左右,具體凍干(gan)(gan)(gan)產品(pin)不同(tong),凍干(gan)(gan)(gan)所需(xu)要的時間也有所不同(tong),如果(guo)是(shi)結晶點低的生(sheng)物制(zhi)品(pin),一般需(xu)要三(san)十幾個(ge)(ge)小(xiao)時。