不銹鋼PCT加速老化試驗箱價格行情
1,軟(ruan)故(gu)(gu)障(zhang),軟(ruan)故(gu)(gu)障(zhang)主(zhu)要指的(de)就(jiu)是高低溫試驗箱的(de)控(kong)(kong)制(zhi)器故(gu)(gu)障(zhang),包括內部的(de)參(can)數(shu),控(kong)(kong)制(zhi)電磁(ci)閥通(tong)斷(duan)的(de)各控(kong)(kong)制(zhi)點IS控(kong)(kong)制(zhi)及輸(shu)出(chu)信(xin)號等。
2,系(xi)統故障(zhang),系(xi)統故障(zhang)指的(de)(de)是(shi)(shi)制(zhi)冷系(xi)統初始(shi)設計(ji)有問題,也包括制(zhi)冷劑的(de)(de)泄漏所造(zao)成(cheng)的(de)(de)高低(di)溫(wen)試驗箱(xiang)不降溫(wen),而(er)制(zhi)冷劑泄漏往往是(shi)(shi)由于運(yun)輸及高低(di)溫(wen)試驗箱(xiang)運(yun)轉過程中(zhong)抖動或制(zhi)冷銅管焊接工(gong)藝不精等原(yuan)因(yin)造(zao)成(cheng)。
3,硬件故障,其中有(you)可能導致(zhi)不制冷的硬件壓縮機,電磁閥等制冷的元件。
那么我(wo)們使(shi)用者(zhe)可以通(tong)過(guo)聽(ting)與(yu)摸來大概了解是什(shen)么硬(ying)件恒溫恒濕試驗箱損壞(huai),假如是壓縮(suo)(suo)機故障(zhang),壓縮(suo)(suo)機的聲音會(hui)異(yi)常或者(zhe)不動作(zuo)不啟(qi)動或者(zhe)壓縮(suo)(suo)機自(zi)身溫度比平(ping)時溫度高許(xu)多,而電磁(ci)閥故障(zhang)及其它制冷的元件故障(zhang)使(shi)用者(zhe)不是太好掌握。
另外控制器的損壞及控制制冷(leng)系(xi)統的電子零(ling)件損壞也有(you)可能造成(cheng)高低溫試(shi)驗箱不降溫不制冷(leng)的現(xian)象。
恒溫(wen)恒濕試驗箱(xiang)升溫(wen)與降(jiang)溫(wen)的科(ke)學原理。
恒溫(wen)恒濕(shi)試(shi)驗(yan)箱具有加溫(wen),降溫(wen),加濕(shi),降濕(shi)的(de)功能(neng),能(neng)夠檢(jian)測出產品耐(nai)高溫(wen),耐(nai)低溫(wen)和抗(kang)濕(shi)度的(de)能(neng)力,那么恒溫(wen)恒濕(shi)試(shi)驗(yan)箱內的(de)溫(wen)度是如何(he)控制的(de)呢。
加(jia)溫(wen)裝(zhuang)置是控制恒(heng)(heng)溫(wen)恒(heng)(heng)濕(shi)(shi)試驗(yan)箱是否(fou)升溫(wen)的關鍵環(huan)節,控制器在得到升溫(wen)指令時輸(shu)出電壓給繼電器,大約3-12伏直流電加(jia)在固(gu)態繼電器上面,它的交流端相當于(yu)導線接(jie)通(tong),接(jie)觸器也同時吸(xi)合,加(jia)熱器兩端有電壓使(shi)其發熱,通(tong)過循環(huan)風機帶動(dong)把熱量帶到箱里,使(shi)恒(heng)(heng)溫(wen)恒(heng)(heng)濕(shi)(shi)試驗(yan)箱升溫(wen)。
降(jiang)溫(wen)(wen)是(shi)(shi)恒(heng)溫(wen)(wen)恒(heng)濕(shi)試(shi)驗(yan)箱的重(zhong)(zhong)要環(huan)節(jie)(jie),直接影響(xiang)著一臺恒(heng)溫(wen)(wen)恒(heng)濕(shi)及性(xing)能好壞(huai)的判定,它(ta)包括壓(ya)(ya)縮(suo)(suo)機(ji),冷(leng)凝(ning)器(qi),節(jie)(jie)流(liu)裝置,蒸發器(qi)四大組成(cheng),壓(ya)(ya)縮(suo)(suo)機(ji)是(shi)(shi)制(zhi)冷(leng)系統心臟,它(ta)吸(xi)(xi)入低溫(wen)(wen)低壓(ya)(ya)氣體(ti),變成(cheng)高(gao)溫(wen)(wen)高(gao)壓(ya)(ya)氣體(ti),通過(guo)冷(leng)凝(ning)成(cheng)液(ye)體(ti)放出熱量,通過(guo)風機(ji)帶走熱量,所以試(shi)驗(yan)箱下面是(shi)(shi)熱風原因(yin),然后(hou)通過(guo)節(jie)(jie)流(liu)成(cheng)為低壓(ya)(ya)液(ye)體(ti),其次(ci)通過(guo)蒸發器(qi)成(cheng)為低溫(wen)(wen)低壓(ya)(ya)氣體(ti)后(hou)回到壓(ya)(ya)縮(suo)(suo)機(ji),制(zhi)冷(leng)劑在蒸發器(qi)中吸(xi)(xi)高(gao)低溫(wen)(wen)箱收熱量完成(cheng)氣化過(guo)程重(zhong)(zhong)而(er)吸(xi)(xi)收熱量,達到制(zhi)冷(leng)目的,完成(cheng)恒(heng)溫(wen)(wen)恒(heng)濕(shi)試(shi)驗(yan)箱降(jiang)溫(wen)(wen)過(guo)程。
溫(wen)(wen)恒(heng)濕箱升溫(wen)(wen)及(ji)降溫(wen)(wen)速率測試(shi)程(cheng)序(xu):。
在試驗箱溫(wen)(wen)(wen)度可(ke)調范圍內,選取(qu)低(di)(di)標稱溫(wen)(wen)(wen)度為(wei)低(di)(di)降溫(wen)(wen)(wen)溫(wen)(wen)(wen)度,標稱溫(wen)(wen)(wen)度為(wei)升(sheng)溫(wen)(wen)(wen)溫(wen)(wen)(wen)度。
開(kai)啟冷(leng)源,使試驗箱由(you)室溫(wen)(wen)(wen)(wen)降(jiang)(jiang)到(dao)(dao)低降(jiang)(jiang)溫(wen)(wen)(wen)(wen)溫(wen)(wen)(wen)(wen)度(du),至(zhi)少(shao)穩定(ding)3h后(hou),升(sheng)到(dao)(dao)升(sheng)溫(wen)(wen)(wen)(wen)溫(wen)(wen)(wen)(wen)度(du),至(zhi)少(shao)穩定(ding)3h后(hou)再(zai)降(jiang)(jiang)到(dao)(dao)低降(jiang)(jiang)溫(wen)(wen)(wen)(wen)溫(wen)(wen)(wen)(wen)度(du),升(sheng)溫(wen)(wen)(wen)(wen)和降(jiang)(jiang)溫(wen)(wen)(wen)(wen)期間,每分鐘(zhong)記錄1次,直到(dao)(dao)試驗過程結束。
不銹鋼PCT加速老化試驗箱價格行情