長期供應PVC鹽霧試驗箱
1,軟故障(zhang),軟故障(zhang)主要指的(de)就是高(gao)低溫試驗箱的(de)控(kong)(kong)制器故障(zhang),包括內部的(de)參數(shu),控(kong)(kong)制電(dian)磁閥通(tong)斷的(de)各控(kong)(kong)制點IS控(kong)(kong)制及輸出(chu)信號等。
2,系統故(gu)障,系統故(gu)障指的(de)是制冷(leng)系統初始設(she)計有問題(ti),也包括制冷(leng)劑的(de)泄(xie)漏所(suo)造(zao)成(cheng)的(de)高低溫(wen)(wen)試驗箱(xiang)不降溫(wen)(wen),而制冷(leng)劑泄(xie)漏往(wang)往(wang)是由于運輸(shu)及(ji)高低溫(wen)(wen)試驗箱(xiang)運轉過程(cheng)中抖動或(huo)制冷(leng)銅管焊(han)接工藝(yi)不精等原因造(zao)成(cheng)。
3,硬(ying)件(jian)故障,其中有可能導(dao)致不制冷的硬(ying)件(jian)壓縮機,電磁閥等(deng)制冷的元(yuan)件(jian)。
那么(me)我們(men)使(shi)用(yong)者(zhe)可以通(tong)過(guo)聽與摸來大概了解是(shi)什么(me)硬件恒溫(wen)恒濕試驗箱損壞,假如是(shi)壓(ya)(ya)縮(suo)機(ji)故障(zhang),壓(ya)(ya)縮(suo)機(ji)的(de)聲音會異常或者(zhe)不(bu)(bu)(bu)動(dong)作不(bu)(bu)(bu)啟動(dong)或者(zhe)壓(ya)(ya)縮(suo)機(ji)自身溫(wen)度比平時溫(wen)度高許多,而電磁(ci)閥故障(zhang)及其它制冷的(de)元件故障(zhang)使(shi)用(yong)者(zhe)不(bu)(bu)(bu)是(shi)太好掌(zhang)握。
另外控制(zhi)器的(de)損壞(huai)(huai)及控制(zhi)制(zhi)冷系統的(de)電子零件損壞(huai)(huai)也有可能造成(cheng)高低溫試驗箱(xiang)不降溫不制(zhi)冷的(de)現象。
恒溫恒濕試驗箱升(sheng)溫與(yu)降(jiang)溫的(de)科學原理。
恒溫(wen)恒濕(shi)(shi)試驗箱具有加溫(wen),降溫(wen),加濕(shi)(shi),降濕(shi)(shi)的(de)功能(neng),能(neng)夠檢測出產品耐高溫(wen),耐低溫(wen)和抗(kang)濕(shi)(shi)度的(de)能(neng)力,那么恒溫(wen)恒濕(shi)(shi)試驗箱內的(de)溫(wen)度是如(ru)何控(kong)制的(de)呢。
加(jia)溫(wen)(wen)裝置(zhi)是控(kong)制(zhi)(zhi)恒(heng)溫(wen)(wen)恒(heng)濕(shi)試(shi)(shi)驗箱(xiang)是否(fou)升溫(wen)(wen)的關鍵(jian)環(huan)(huan)節,控(kong)制(zhi)(zhi)器(qi)在得(de)到升溫(wen)(wen)指令時輸(shu)出電(dian)(dian)(dian)壓給繼電(dian)(dian)(dian)器(qi),大約3-12伏直流(liu)電(dian)(dian)(dian)加(jia)在固態繼電(dian)(dian)(dian)器(qi)上面,它(ta)的交流(liu)端相當于導線接通,接觸(chu)器(qi)也同時吸合(he),加(jia)熱器(qi)兩(liang)端有電(dian)(dian)(dian)壓使其發熱,通過循環(huan)(huan)風(feng)機帶動(dong)把(ba)熱量帶到箱(xiang)里,使恒(heng)溫(wen)(wen)恒(heng)濕(shi)試(shi)(shi)驗箱(xiang)升溫(wen)(wen)。
降(jiang)溫(wen)(wen)是(shi)恒(heng)溫(wen)(wen)恒(heng)濕試(shi)驗箱的(de)(de)重(zhong)要環節(jie),直接影響(xiang)著一臺恒(heng)溫(wen)(wen)恒(heng)濕及性能好壞的(de)(de)判定,它包括(kuo)壓(ya)(ya)(ya)縮機(ji),冷凝器,節(jie)流裝置,蒸(zheng)發(fa)(fa)器四大組(zu)成(cheng),壓(ya)(ya)(ya)縮機(ji)是(shi)制(zhi)冷系統心臟,它吸(xi)入(ru)低溫(wen)(wen)低壓(ya)(ya)(ya)氣(qi)體(ti),變成(cheng)高溫(wen)(wen)高壓(ya)(ya)(ya)氣(qi)體(ti),通過(guo)冷凝成(cheng)液(ye)體(ti)放(fang)出熱(re)量,通過(guo)風機(ji)帶(dai)走熱(re)量,所(suo)以(yi)試(shi)驗箱下面是(shi)熱(re)風原(yuan)因,然后通過(guo)節(jie)流成(cheng)為低壓(ya)(ya)(ya)液(ye)體(ti),其次通過(guo)蒸(zheng)發(fa)(fa)器成(cheng)為低溫(wen)(wen)低壓(ya)(ya)(ya)氣(qi)體(ti)后回到(dao)壓(ya)(ya)(ya)縮機(ji),制(zhi)冷劑在蒸(zheng)發(fa)(fa)器中吸(xi)高低溫(wen)(wen)箱收熱(re)量完(wan)成(cheng)氣(qi)化過(guo)程重(zhong)而吸(xi)收熱(re)量,達到(dao)制(zhi)冷目的(de)(de),完(wan)成(cheng)恒(heng)溫(wen)(wen)恒(heng)濕試(shi)驗箱降(jiang)溫(wen)(wen)過(guo)程。
溫恒濕箱升溫及降溫速(su)率(lv)測(ce)試程(cheng)序:。
在(zai)試驗箱溫(wen)(wen)度(du)(du)(du)可調(diao)范圍內,選取低標(biao)稱(cheng)溫(wen)(wen)度(du)(du)(du)為低降溫(wen)(wen)溫(wen)(wen)度(du)(du)(du),標(biao)稱(cheng)溫(wen)(wen)度(du)(du)(du)為升(sheng)溫(wen)(wen)溫(wen)(wen)度(du)(du)(du)。
開啟冷源,使試(shi)驗(yan)箱由室溫(wen)降到(dao)(dao)低降溫(wen)溫(wen)度(du),至少穩定(ding)3h后(hou),升到(dao)(dao)升溫(wen)溫(wen)度(du),至少穩定(ding)3h后(hou)再(zai)降到(dao)(dao)低降溫(wen)溫(wen)度(du),升溫(wen)和降溫(wen)期間,每分鐘(zhong)記錄1次(ci),直到(dao)(dao)試(shi)驗(yan)過程結(jie)束(shu)。
長期供應PVC鹽霧試驗箱