恒濕恒濕試驗箱設置與制冷穩定性
作者：高天試驗設備 發布日期：2017-01-18 13:39:25
對于試驗(yan)(yan)設(she)備，尤其是(shi)(shi)基準、試驗(yan)(yan)標(biao)準或某些實物檢(jian)測，穩(wen)定性是(shi)(shi)重(zhong)要(yao)的(de)實驗(yan)(yan)性能之一，而產生不穩(wen)定的(de)因素(su)很多。線性濕恒濕試驗(yan)(yan)箱的(de)穩(wen)定性絕大部分來(lai)源于機械(xie)本身的(de)設(she)置(zhi)，這是(shi)(shi)客戶在使用中無(wu)法更(geng)改的(de)；另一方面則是(shi)(shi)使用過(guo)程中的(de)設(she)置(zhi)、貯存、維護工作不仔細等所(suo)致，這個(ge)是(shi)(shi)都(dou)由客戶自己掌控的(de)。所(suo)以(yi)試驗(yan)(yan)箱的(de)好與不好，大都(dou)取決(jue)于客戶怎么用，然(ran)而大多數(shu)工廠的(de)使用者(zhe)都(dou)是(shi)(shi)沒有(you)受(shou)過(guo)專業(ye)培訓的(de)，只能根據一紙(zhi)說明書在操作，很難(nan)達到理想狀態。
可程式恒(heng)溫(wen)恒(heng)濕(shi)箱的降溫(wen)、降濕(shi)都是靠制冷(leng)系(xi)(xi)統(tong)完成，同(tong)一(yi)個系(xi)(xi)統(tong)卻能使機器達(da)到兩種不(bu)同(tong)的狀態，這都是靠人在操作的，所以(yi)準確設置恒(heng)溫(wen)恒(heng)濕(shi)試驗機的工(gong)作系(xi)(xi)統(tong)非常重要，合理正確的使用，就能達(da)到你想要的結果。
說(shuo)到(dao)恒(heng)(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)(heng)濕試(shi)驗機(ji)的穩定性(xing)，就(jiu)(jiu)(jiu)必須要講到(dao)恒(heng)(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)(heng)濕箱的制(zhi)(zhi)(zhi)冷(leng)系統。可(ke)程式恒(heng)(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)(heng)濕箱中(zhong)單級制(zhi)(zhi)(zhi)冷(leng)循環基本(ben)上采(cai)用的中(zhong)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)制(zhi)(zhi)(zhi)冷(leng)劑是(shi)R404A，在一個(ge)大氣壓下其蒸發(fa)(fa)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)是(shi)-46.5℃，但(dan)空氣冷(leng)卻式冷(leng)凝器傳熱溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)差(cha)通常取(qu)10℃左右，也(ye)就(jiu)(jiu)(jiu)是(shi)說(shuo)箱內只(zhi)能(neng)(neng)制(zhi)(zhi)(zhi)取(qu)-36.5℃的低(di)(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)，那(nei)么想要獲取(qu)更低(di)(di)(di)的溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)需要怎么辦(ban)呢？這個(ge)時(shi)候就(jiu)(jiu)(jiu)可(ke)以(yi)(yi)通過調低(di)(di)(di)壓縮(suo)機(ji)的蒸發(fa)(fa)壓力，可(ke)以(yi)(yi)將R404A制(zhi)(zhi)(zhi)冷(leng)劑的最低(di)(di)(di)蒸發(fa)(fa)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度(du)降(jiang)低(di)(di)(di)到(dao)-50℃，所(suo)以(yi)(yi)要得(de)到(dao)-50℃及以(yi)(yi)下的低(di)(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)時(shi)就(jiu)(jiu)(jiu)必須采(cai)取(qu)中(zhong)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)制(zhi)(zhi)(zhi)冷(leng)劑與低(di)(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)制(zhi)(zhi)(zhi)冷(leng)劑復疊式的制(zhi)(zhi)(zhi)冷(leng)循環，這樣才能(neng)(neng)保證可(ke)程式恒(heng)(heng)(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)恒(heng)(heng)(heng)濕箱制(zhi)(zhi)(zhi)冷(leng)穩定性(xing)。
