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(cheng)是冷(leng)凍(dong)(dong)(dong)(dong)(dong)干(gan)燥機(ji),由制(zhi)冷(leng)系(xi)統(tong)、真(zhen)(zhen)空(kong)(kong)系(xi)統(tong)、加熱(re)系(xi)統(tong)、電器儀表控制(zhi)系(xi)統(tong)所組成(cheng),主(zhu)要部件為干(gan)燥箱、凝結(jie)器、冷(leng)凍(dong)(dong)(dong)(dong)(dong)機(ji)組、真(zhen)(zhen)空(kong)(kong)泵、加熱(re)/冷(leng)卻裝置等,工作時,它主(zhu)要利用的是升華的原理,將被干(gan)燥的物品(pin)(pin)先(xian)凍(dong)(dong)(dong)(dong)(dong)結(jie)到(dao)三(san)相點溫度(du)以下,然(ran)后(hou)在真(zhen)(zhen)空(kong)(kong)條件下使(shi)物品(pin)(pin)中的固態水(shui)份(冰(bing))直接升華成(cheng)水(shui)蒸氣(qi),從(cong)物品(pin)(pin)中排除(chu),使(shi)物品(pin)(pin)干(gan)燥。真(zhen)(zhen)空(kong)(kong)凍(dong)(dong)(dong)(dong)(dong)干(gan)機(ji)的凍(dong)(dong)(dong)(dong)(dong)干(gan)分為三(san)個過(guo)程(cheng):(1)預凍(dong)(dong)(dong)(dong)(dong),為接下來的升華過(guo)程(cheng)準備樣(yang)品(pin)(pin)。(2)初級(ji)干(gan)燥,在此過(guo)程(cheng)中,冰(bing)升華而(er)不融化。(3)次(ci)級(ji)干(gan)燥,在此過(guo)程(cheng)中,鍵(jian)和(he)于(yu)固體物質的殘留(liu)水(shui)分被除(chu)去,從(cong)而(er)留(liu)下干(gan)燥樣(yang)品(pin)(pin),完成(cheng)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、開機前檢查(電(dian)源、真空(kong)(kong)泵等):(1)真空(kong)(kong)泵置于地面,與主機保持一定(ding)高度(du)差。防(fang)止(zhi)突發(fa)停(ting)電(dian)產生(sheng)返油(you)(you)。若發(fa)生(sheng)停(ting)電(dian)事(shi)故,應立(li)即擰開充(chong)氣閥充(chong)氣,盡快(kuai)取(qu)出(chu)樣(yang)品。(2)真空(kong)(kong)泵油(you)(you)應該定(ding)期更換,注(zhu)意保養和維護。油(you)(you)量通過(guo)玻璃窗口來觀察,最好控制(zhi)在(zai)2/3左(zuo)右(you),過(guo)多容(rong)易(yi)出(chu)現(xian)噴油(you)(you)現(xian)象,過(guo)少(shao)容(rong)易(yi)出(chu)現(xian)真空(kong)(kong)度(du)不足。3、打開電(dian)源總開關(guan),按“制(zhi)冷(leng)”鍵(jian)(jian),儀器(qi)使用前需要制(zhi)冷(leng)半小時(shi)。4、將(jiang)待凍干的樣(yang)品從冰箱中取(qu)出(chu)放好,扣上(shang)有(you)機玻璃罩,檢查“○”型(xing)圈是否密(mi)封好。然后(hou)按下(xia)充(chong)氣閥上(shang)的不銹(xiu)鋼片,拔出(chu)小管將(jiang)儀器(qi)密(mi)封。5、按“真空(kong)(kong)計(ji)”鍵(jian)(jian),真空(kong)(kong)度(du)顯示;再(zai)按“真空(kong)(kong)泵”鍵(jian)(jian),真空(kong)(kong)泵工作。6、凍干結束后(hou),首(shou)先擰開充(chong)氣閥充(chong)氣,使空(kong)(kong)氣緩慢進入(ru),然后(hou)再(zai)關(guan)閉(bi)真空(kong)(kong)泵,防(fang)止(zhi)真空(kong)(kong)泵返油(you)(you)。再(zai)關(guan)閉(bi)真空(kong)(kong)計(ji)、制(zhi)冷(leng)按鈕(niu)和總電(dian)源。最后(hou)取(qu)下(xia)有(you)機玻璃罩,將(jiang)樣(yang)品取(qu)出(chu)保存(cun)。7、最后(hou)將(jiang)凍干機冷(leng)阱內的冰塊清理(li)掉,方(fang)便下(xia)次使用。
四、凍干機凍干需要多久
冷凍(dong)(dong)(dong)干(gan)(gan)燥(zao)機的整個(ge)凍(dong)(dong)(dong)干(gan)(gan)過(guo)(guo)(guo)程(cheng)都是(shi)(shi)在低溫(wen)低壓環境下進行的,是(shi)(shi)一個(ge)由(you)低溫(wen)逐(zhu)漸緩慢升溫(wen)的過(guo)(guo)(guo)程(cheng),如果升溫(wen)過(guo)(guo)(guo)快、溫(wen)度過(guo)(guo)(guo)高,容(rong)易(yi)導(dao)致最終凍(dong)(dong)(dong)干(gan)(gan)產(chan)品(pin)外(wai)觀崩塌、品(pin)相不(bu)佳,凍(dong)(dong)(dong)干(gan)(gan)過(guo)(guo)(guo)程(cheng)分為:預凍(dong)(dong)(dong)、升華干(gan)(gan)燥(zao)、解析干(gan)(gan)燥(zao)等三個(ge)階段,一般正常情況(kuang)下需(xu)(xu)(xu)要(yao)(yao)24小時左(zuo)右,具體凍(dong)(dong)(dong)干(gan)(gan)產(chan)品(pin)不(bu)同,凍(dong)(dong)(dong)干(gan)(gan)所需(xu)(xu)(xu)要(yao)(yao)的時間也有(you)所不(bu)同,如果是(shi)(shi)結晶(jing)點低的生物制(zhi)品(pin),一般需(xu)(xu)(xu)要(yao)(yao)三十幾個(ge)小時。