實驗室(shi)冷凍(dong)離(li)(li)心機(ji)可以保證實驗溫度(du)在(zai)4度(du)左右，保證樣品的的生物(wu)活性(xing)。冷凍(dong)離(li)(li)心機(ji)在(zai)使(shi)用過(guo)程(cheng)中難免遇到(dao)故(gu)障(zhang)，為您總結下(xia)日(ri)常遇到(dao)的故(gu)障(zhang)以及處理的方式。

冷凍(dong)離心(xin)機故障及解決(jue)方法，

1.實驗(yan)室(shi)冷(leng)凍離心機(ji)在使用(yong)過程(cheng)中(zhong)經常出(chu)現(xian)電(dian)(dian)機(ji)不(bu)能(neng)起動的(de)現(xian)象。如(ru)主(zhu)電(dian)(dian)源指示燈(deng)不(bu)亮時(shi)，檢(jian)查(cha)(cha)指示燈(deng)保(bao)險絲及室(shi)內配(pei)電(dian)(dian)板保(bao)險絲是(shi)(shi)(shi)否熔斷(duan)，同時(shi)檢(jian)查(cha)(cha)電(dian)(dian)源線是(shi)(shi)(shi)否接(jie)觸良(liang)好。保(bao)險絲斷(duan)則應(ying)(ying)更換保(bao)險絲并保(bao)持電(dian)(dian)路(lu)暢(chang)通(tong)如(ru)主(zhu)電(dian)(dian)源指示燈(deng)亮，這時(shi)應(ying)(ying)檢(jian)查(cha)(cha)炭刷(shua)磨損程(cheng)度(du)，如(ru)炭刷(shua)磨損超過總量(liang)的(de)三分之(zhi)一，應(ying)(ying)及時(shi)更換新的(de)炭刷(shua)。還應(ying)(ying)檢(jian)查(cha)(cha)真(zhen)空泵(beng)表及油壓(ya)指示值，如(ru)油壓(ya)過高而(er)主(zhu)機(ji)也不(bu)能(neng)啟(qi)動，必須檢(jian)查(cha)(cha)各油路(lu)是(shi)(shi)(shi)否堵(du)塞，特別是(shi)(shi)(shi)節流小孔是(shi)(shi)(shi)否暢(chang)通(tong)，如(ru)不(bu)暢(chang)通(tong)應(ying)(ying)清洗(xi)使之(zhi)暢(chang)通(tong)。

2. 實驗室冷凍(dong)離心(xin)(xin)機啟動(dong)(dong)及制(zhi)冷效(xiao)果(guo)差的(de)原因之(zhi)一是電(dian)(dian)源(yuan)(yuan)不(bu)(bu)(bu)(bu)(bu)通(tong)，應分別檢查電(dian)(dian)源(yuan)(yuan)及保險絲。電(dian)(dian)壓(ya)(ya)過(guo)低(di)(di)，安全裝(zhuang)置故(gu)障也可(ke)使(shi)冷凍(dong)機不(bu)(bu)(bu)(bu)(bu)能(neng)(neng)(neng)啟動(dong)(dong)，電(dian)(dian)壓(ya)(ya)過(guo)低(di)(di)可(ke)能(neng)(neng)(neng)是電(dian)(dian)網電(dian)(dian)壓(ya)(ya)低(di)(di);配(pei)電(dian)(dian)板配(pei)線過(guo)多(duo);電(dian)(dian)源(yuan)(yuan)線過(guo)長(chang)(理想長(chang)度為3米)等。電(dian)(dian)源(yuan)(yuan)線容量不(bu)(bu)(bu)(bu)(bu)夠，不(bu)(bu)(bu)(bu)(bu)僅使(shi)電(dian)(dian)壓(ya)(ya)降低(di)(di)，還會造成意外事(shi)故(gu)。當電(dian)(dian)源(yuan)(yuan)電(dian)(dian)壓(ya)(ya)降到180-190VJ時，冷凍(dong)離心(xin)(xin)機不(bu)(bu)(bu)(bu)(bu)能(neng)(neng)(neng)啟動(dong)(dong)，影(ying)響制(zhi)冷效(xiao)果(guo)。通(tong)風性能(neng)(neng)(neng)不(bu)(bu)(bu)(bu)(bu)好，如(ru)儀器(qi)安裝(zhuang)在日光直射(she)或通(tong)風不(bu)(bu)(bu)(bu)(bu)良處(chu)，散(san)(san)熱器(qi)效(xiao)果(guo)差，或散(san)(san)熱器(qi)蓋滿灰塵(chen)，也中會影(ying)響制(zhi)冷效(xiao)果(guo)。離心(xin)(xin)管重量不(bu)(bu)(bu)(bu)(bu)平衡，放置不(bu)(bu)(bu)(bu)(bu)對稱;轉(zhuan)(zhuan)(zhuan)子孔內有異物，使(shi)負(fu)荷不(bu)(bu)(bu)(bu)(bu)平衡;轉(zhuan)(zhuan)(zhuan)軸上(shang)端(duan)固定(ding)螺帽松動(dong)(dong)，轉(zhuan)(zhuan)(zhuan)軸磨擦或彎曲(qu);電(dian)(dian)機轉(zhuan)(zhuan)(zhuan)子不(bu)(bu)(bu)(bu)(bu)在磁場(chang)中心(xin)(xin)會產生(sheng)噪(zao)音;轉(zhuan)(zhuan)(zhuan)子本(ben)身損傷等都(dou)可(ke)導致機體震動(dong)(dong)劇(ju)烈、響聲異常。

3.實驗室(shi)冷(leng)凍離(li)心(xin)機軸(zhou)(zhou)承(cheng)損(sun)壞(huai)或(huo)轉(zhuan)動受(shou)阻(zu)，軸(zhou)(zhou)承(cheng)內(nei)缺(que)油(you)或(huo)軸(zhou)(zhou)承(cheng)內(nei)有污垢較(jiao)多而引(yin)起摩擦阻(zu)力增大，電機達不(bu)(bu)到額定轉(zhuan)速(su)，應(ying)及(ji)時清洗或(huo)更(geng)換軸(zhou)(zhou)承(cheng)。整(zheng)流子(zi)(zi)表(biao)面有一層氧化(hua)物，甚至燒成凹凸不(bu)(bu)平(ping)或(huo)電刷與整(zheng)流子(zi)(zi)外緣(yuan)不(bu)(bu)吻合也可使(shi)轉(zhuan)速(su)下降，應(ying)清理(li)整(zheng)流子(zi)(zi)及(ji)電刷，使(shi)其(qi)接(jie)觸良好。如轉(zhuan)子(zi)(zi)線圈(quan)中(zhong)(zhong)短(duan)路或(huo)斷路，可用(yong)萬用(yong)表(biao)檢查，重新(xin)繞(rao)制線圈(quan)。轉(zhuan)子(zi)(zi)在使(shi)用(yong)時可因金屬疲勞、超速(su)、過應(ying)力、化(hua)學(xue)腐蝕、選擇不(bu)(bu)當、使(shi)用(yong)中(zhong)(zhong)轉(zhuan)頭(tou)不(bu)(bu)平(ping)衡及(ji)溫度失控等原(yuan)因而導致離(li)心(xin)管破裂，樣(yang)品滲(shen)漏，轉(zhuan)子(zi)(zi)損(sun)壞(huai)。對于(yu)以(yi)上情況主要要求操(cao)作(zuo)者熟練掌握(wo)操(cao)作(zuo)程序(xu)，正確選用(yong)合適的離(li)心(xin)管和離(li)心(xin)轉(zhuan)子(zi)(zi)，注意嚴格(ge)控制每一步操(cao)作(zuo)操(cao)序(xu)，盡(jin)量減少人為的不(bu)(bu)必要的損(sun)傷，在轉(zhuan)子(zi)(zi)的安(an)全系(xi)數及(ji)保證(zheng)期(qi)內(nei)使(shi)用(yong)。

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