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如何維護保養高低溫試驗箱?變溫速率怎么選

瀏覽:   時間:2018.04.08   來源:東莞市恒工設備有限公司

如何維護保養高低溫試驗箱?變溫速率怎么選


    高低(di)溫(wen)試驗(yan)箱的運(yun)行(xing)(xing)壽命和(he)運(yun)行(xing)(xing)穩定性,除(chu)了因(yin)為(wei)本身高低(di)溫(wen)試驗(yan)箱配置決定了其性能之外,還有(you)一(yi)項重要(yao)的因(yin)素,那就是(shi)在平常使用高低(di)溫(wen)試驗(yan)箱的過(guo)程中(zhong),是(shi)否有(you)科(ke)學(xue)合(he)理的保養和(he)維護,這尤為(wei)重要(yao)。特(te)別(bie)是(shi)針(zhen)對一(yi)些粉塵較大(da)、潮(chao)濕(shi)等環境的,對高低(di)溫(wen)試驗(yan)箱的壽命影(ying)響尤為(wei)重要(yao)。


    高低(di)溫試驗(yan)箱是一類比較精密的(de)設(she)備(bei),通過對于環(huan)境(jing)溫度(du)和濕度(du)的(de)調節來檢測(ce)(ce)產(chan)品(pin)在不同環(huan)境(jing)狀態(tai)下的(de)耐受情況。同時也(ye)是一種(zhong)比較昂貴(gui)的(de)檢測(ce)(ce)儀器,所以(yi)在平時的(de)使用過程中(zhong),我們一定要對機器進行合理的(de)維護和保養,才能保證機器運(yun)轉的(de)穩定性和耐用性。
    1、由(you)于(yu)高(gao)(gao)低溫(wen)試驗(yan)箱價值(zhi)一般都(dou)比較高(gao)(gao),我們建議將其置于(yu)比較良性溫(wen)度環境中(zhong),我們的下面(mian)經驗(yan)溫(wen)度值(zhi)為8℃~23℃,對不具(ju)備此 條件的實(shi)驗(yan)室,須(xu)配備適當(dang)的空調(diao)器(風冷(leng)(leng)(leng))或冷(leng)(leng)(leng)卻塔(水冷(leng)(leng)(leng))。
    2、堅持專(zhuan)人專(zhuan)業管(guan)理。有條(tiao)件(jian)的(de)單位(wei),應不定(ding)期派專(zhuan)人到(dao)供方工廠培訓(xun)學習(xi),以獲得較專(zhuan)業的(de)維護、維修經驗和能力(li)。
    3、定期(qi)(每3個月)清洗冷(leng)(leng)(leng)凝(ning)器:對于(yu)壓縮機(ji)采(cai)用風(feng)冷(leng)(leng)(leng)冷(leng)(leng)(leng)卻(que)的(de),應定期(qi)檢修冷(leng)(leng)(leng)凝(ning)風(feng)機(ji),并對冷(leng)(leng)(leng)凝(ning)器進行(xing)去污除(chu)塵,以(yi)保(bao)(bao)證其良好的(de)通風(feng)換熱性能;對于(yu)壓縮機(ji)采(cai)用 水冷(leng)(leng)(leng)冷(leng)(leng)(leng)卻(que)的(de),除(chu)須(xu)保(bao)(bao)證其進水壓力、進水溫度(du)外,還必須(xu)保(bao)(bao)證相(xiang)應流量,并定期(qi)對冷(leng)(leng)(leng)凝(ning)器內部進行(xing)清洗除(chu)垢,以(yi)獲(huo)取其持續的(de)換熱性能。
    4、定期(qi)(每3個月)清洗蒸發(fa)(除濕)器:因(yin)試品的(de)潔凈等級各異,在強制風循環作用下,蒸發(fa)(除濕)器上會(hui)凝聚很多(duo)塵埃等小(xiao)顆粒(li)物體,應(ying)定期(qi)進(jin)行清洗。
    5、循(xun)環(huan)風(feng)葉(xie)、冷凝(ning)器(qi)風(feng)機清潔和校平(ping)衡(heng):與清洗(xi)蒸發器(qi)相似(si),因試驗箱的工作環(huan)境各異,循(xun)環(huan)風(feng)葉(xie)、冷凝(ning)器(qi)風(feng)機上會凝(ning)聚很多(duo)塵埃(ai)等小顆粒物體,應(ying)定期進行清 洗(xi)。
    6、水路(lu)、加(jia)濕(shi)器清洗:若水路(lu)不暢、加(jia)濕(shi)器結垢易導致加(jia)濕(shi)器干(gan)燒,可能損壞(huai)加(jia)濕(shi)器,所以必須定期對水路(lu)、加(jia)濕(shi)器進行(xing)清洗。
    7、堅持每次試驗完畢后,將(jiang)溫(wen)度設定在環境溫(wen)度附近,工(gong)作30分鐘左右,再切斷(duan)電源,并擦(ca)干凈工(gong)作室內壁。
    8、設(she)備若(ruo)需搬遷最好在公(gong)司(si)技術人員指導下進行,以免造成不必要的損(sun)傷(shang)或損(sun)壞(huai)設(she)備。
    9、長期停機不使用,應定期每(mei)半月給產品通電,通電時間不小于1小時。
    維修原則:由于環(huan)境試驗箱基本由電氣、制(zhi)冷和(he)機械多個系統組成,因(yin)此一(yi)旦(dan)設備出(chu)現(xian)問題,應全面(mian)地(di)系統地(di)對(dui)整個設備進(jin)行檢查和(he)綜合分析(xi)。一般(ban)來(lai)說,分 析(xi)判斷的過程可先“外”后“里”,即首(shou)先排(pai)除外部因(yin)(yin)素,如冷卻水、供電等,在完全排(pai)除外部因(yin)(yin)素后,根(gen)據故(gu)障(zhang)現象,對設備進行先系(xi)統分解,后系(xi)統綜合(he)的(de)分 析判斷,可(ke)以采用倒推的(de)方法(fa)查(cha)找故(gu)障(zhang)原因(yin)(yin):首(shou)先按(an)照電氣(qi)(qi)接線圖(tu)查(cha)找是(shi)否電氣(qi)(qi)系(xi)統有問題,最后查(cha)找是(shi)否制(zhi)冷系(xi)統的(de)問題。在沒弄清(qing)故(gu)障(zhang)原因(yin)(yin)前(qian),切不可(ke)肓目拆卸 或(huo)更換零部件,以免造成不必要的(de)麻煩。

    高(gao)低溫(wen)濕熱試驗(yan)箱變(bian)溫(wen)速率怎么選

    普通的(de)(de)(de)高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)濕熱(re)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)沒有(you)降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)度(du)(du)(du)(du)(du)的(de)(de)(de)指(zhi)標,從環(huan)境溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)到(dao)(dao)標稱的(de)(de)(de)最低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)的(de)(de)(de)時間一(yi)般(ban)為(wei)90~120min。高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)濕熱(re)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)、高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)交變(bian)(bian)(bian)(bian)濕熱(re)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)都(dou)有(you)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)度(du)(du)(du)(du)(du)的(de)(de)(de)要求,其(qi)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)率(lv)一(yi)般(ban)要求1℃/min,在(zai)此速(su)(su)率(lv)的(de)(de)(de)范圍內速(su)(su)度(du)(du)(du)(du)(du)可調。而(er)快(kuai)速(su)(su)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)變(bian)(bian)(bian)(bian)化(hua)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)率(lv)較(jiao)快(kuai),升溫(wen)(wen)(wen)(wen)(wen)(wen)、降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)率(lv)可以達到(dao)(dao)3℃/min~15℃/min,在(zai)某(mou)些溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)段升溫(wen)(wen)(wen)(wen)(wen)(wen)、降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)率(lv)甚(shen)至可以達到(dao)(dao)30℃/min以上。各(ge)(ge)種(zhong)規格、速(su)(su)度(du)(du)(du)(du)(du)的(de)(de)(de)快(kuai)速(su)(su)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)變(bian)(bian)(bian)(bian)化(hua)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)范圍一(yi)般(ban)都(dou)是(shi)相(xiang)同(tong)的(de)(de)(de),即-60~130℃,但考核(he)降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)度(du)(du)(du)(du)(du)的(de)(de)(de)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)范圍卻不(bu)盡(jin)相(xiang)同(tong),根據試(shi)驗(yan)(yan)(yan)(yan)不(bu)同(tong)的(de)(de)(de)試(shi)驗(yan)(yan)(yan)(yan)要求,高(gao)低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)濕熱(re)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)范圍有(you)的(de)(de)(de)是(shi)-55~80℃,而(er)有(you)的(de)(de)(de)是(shi)-40~80℃。關于快(kuai)速(su)(su)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)變(bian)(bian)(bian)(bian)化(hua)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)率(lv)有(you)兩種(zhong)提法,一(yi)種(zhong)是(shi)全程(cheng)平(ping)均(jun)升降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)度(du)(du)(du)(du)(du),一(yi)種(zhong)是(shi)線形升降(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)度(du)(du)(du)(du)(du)(實際上是(shi)每(mei)5 min平(ping)均(jun)速(su)(su)度(du)(du)(du)(du)(du))。全程(cheng)平(ping)均(jun)速(su)(su)度(du)(du)(du)(du)(du)是(shi)指(zhi)在(zai)試(shi)驗(yan)(yan)(yan)(yan)箱(xiang)(xiang)的(de)(de)(de)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)范圍內,最高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)與(yu)最低(di)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)之差值與(yu)時間之比。目(mu)前國外(wai)各(ge)(ge)環(huan)境試(shi)驗(yan)(yan)(yan)(yan)設備生產(chan)廠家提供的(de)(de)(de)變(bian)(bian)(bian)(bian)溫(wen)(wen)(wen)(wen)(wen)(wen)速(su)(su)率(lv)的(de)(de)(de)技術參(can)數都(dou)是(shi)指(zhi)的(de)(de)(de)全程(cheng)平(ping)均(jun)速(su)(su)率(lv)。
     線(xian)形(xing)(xing)升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)指(zhi)在(zai)任意的每(mei)5 min時間(jian)段內(nei),能夠保證的變(bian)溫速(su)(su)率(lv)。而實際上對于快(kuai)速(su)(su)溫度(du)(du)變(bian)化試(shi)驗(yan)箱來說(shuo),保證線(xian)形(xing)(xing)升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)的難度(du)(du)最大、最關鍵(jian)的一(yi)(yi)段是(shi)(shi),在(zai)降(jiang)(jiang)(jiang)溫段最后(hou)的一(yi)(yi)個(ge)5 min的時間(jian)段內(nei),高低溫濕熱試(shi)驗(yan)箱可以達到的降(jiang)(jiang)(jiang)溫速(su)(su)率(lv)。從某(mou)種角度(du)(du)講(jiang),線(xian)形(xing)(xing)升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)(每(mei)5 min平(ping)均速(su)(su)度(du)(du))更科學。因(yin)此(ci)試(shi)驗(yan)設備最好具有全程平(ping)均升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)和線(xian)形(xing)(xing)升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)(每(mei)5 min平(ping)均速(su)(su)度(du)(du))這兩個(ge)參數。一(yi)(yi)般來說(shuo),線(xian)形(xing)(xing)升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)(每(mei)5 min平(ping)均速(su)(su)度(du)(du))是(shi)(shi)全程平(ping)均升(sheng)降(jiang)(jiang)(jiang)溫速(su)(su)度(du)(du)的1/2。

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