[恒溫恒濕試驗箱]恒溫(wen)恒濕試(shi)驗箱(xiang)升溫(wen)與(yu)降溫(wen)的科學原理

　　恒(heng)溫(wen)恒(heng)濕(shi)(shi)試(shi)驗箱具有加溫(wen)、降(jiang)溫(wen)、加濕(shi)(shi)，降(jiang)濕(shi)(shi)的功能，能夠(gou)檢測出產品(pin)耐高溫(wen)，耐低(di)溫(wen)和抗濕(shi)(shi)度(du)的能力。那么恒(heng)溫(wen)恒(heng)濕(shi)(shi)試(shi)驗箱內(nei)的溫(wen)度(du)是如(ru)何控(kong)制的呢？

　　加(jia)溫(wen)裝置是(shi)控(kong)制(zhi)恒(heng)溫(wen)恒(heng)濕試驗箱是(shi)否(fou)升溫(wen)的關(guan)鍵(jian)環(huan)節(jie)；控(kong)制(zhi)器(qi)在得到(dao)升溫(wen)指令(ling)時(shi)輸出電壓給繼電器(qi)，大約3-12伏(fu)直流(liu)電加(jia)在固態(tai)繼電器(qi)上(shang)面(mian)；它的交流(liu)端(duan)相當于導線接通；接觸器(qi)也同時(shi)吸合，加(jia)熱器(qi)兩(liang)端(duan)有(you)電壓使其發熱，通過(guo)循環(huan)風機帶動把熱量帶到(dao)箱里，使恒(heng)溫(wen)恒(heng)濕試驗箱升溫(wen)。

　　降(jiang)溫是(shi)恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕試驗(yan)箱的(de)重要環(huan)節，直接影響著(zhu)一臺恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕及(ji)性能好壞(huai)的(de)判定，它包括壓(ya)(ya)縮機(ji)、冷(leng)凝器(qi)(qi)(qi)、節流裝置、蒸(zheng)發(fa)器(qi)(qi)(qi)四大組成(cheng)(cheng)。壓(ya)(ya)縮機(ji)是(shi)制冷(leng)系統心(xin)臟，它吸入(ru)低(di)溫低(di)壓(ya)(ya)氣(qi)體(ti)，變成(cheng)(cheng)高溫高壓(ya)(ya)氣(qi)體(ti)，通過冷(leng)凝成(cheng)(cheng)液(ye)(ye)體(ti)放出熱(re)量(liang)，通過風(feng)機(ji)帶走熱(re)量(liang)，所以試驗(yan)箱下面是(shi)熱(re)風(feng)原因，然后(hou)通過節流成(cheng)(cheng)為低(di)壓(ya)(ya)液(ye)(ye)體(ti)，其(qi)次通過蒸(zheng)發(fa)器(qi)(qi)(qi)成(cheng)(cheng)為低(di)溫低(di)壓(ya)(ya)氣(qi)體(ti)最后(hou)回到壓(ya)(ya)縮機(ji)；制冷(leng)劑在蒸(zheng)發(fa)器(qi)(qi)(qi)中吸收(shou)熱(re)量(liang)完成(cheng)(cheng)氣(qi)化過程重而吸收(shou)熱(re)量(liang)，達到制冷(leng)目的(de)，完成(cheng)(cheng)恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕試驗(yan)箱降(jiang)溫過程。

　　溫恒(heng)濕(shi)箱升溫及降溫速(su)率(lv)測試程(cheng)序：

　　在試驗(yan)箱溫度可調范圍內，選(xuan)取最(zui)低(di)標稱溫度為最(zui)低(di)降(jiang)溫溫度，最(zui)高(gao)標稱溫度為最(zui)高(gao)升溫溫度。

　　開啟冷(leng)源，使(shi)試(shi)驗(yan)箱由室溫(wen)降(jiang)到(dao)最(zui)低降(jiang)溫(wen)溫(wen)度(du)，至(zhi)少穩(wen)定3h后，升(sheng)到(dao)最(zui)高(gao)升(sheng)溫(wen)溫(wen)度(du)，至(zhi)少穩(wen)定3h后再降(jiang)到(dao)最(zui)低降(jiang)溫(wen)溫(wen)度(du)。升(sheng)溫(wen)和降(jiang)溫(wen)期間，每分鐘記錄1次，直到(dao)試(shi)驗(yan)過程(cheng)結束。

　　恒(heng)溫(wen)恒(heng)濕試驗(yan)(yan)箱升溫(wen)、降溫(wen)原理便(bian)是(shi)如此，其功能(neng)(neng)的(de)實現是(shi)通(tong)過(guo)控制系統的(de)設(she)置來完成的(de)。了解了升溫(wen)、降溫(wen)的(de)原理，在使用(yong)恒(heng)溫(wen)恒(heng)濕試驗(yan)(yan)箱時一定能(neng)(neng)更得(de)心應手。

　　廣東劍喬試(shi)(shi)驗(yan)設備(bei)有限公司(si)是(shi)專注于(yu)振動(dong)(dong)及環境試(shi)(shi)驗(yan)設備(bei)研(yan)發(fa)、生(sheng)(sheng)產(chan)、銷(xiao)售大(da)型生(sheng)(sheng)產(chan)廠家,主營產(chan)品：振動(dong)(dong)臺、振動(dong)(dong)試(shi)(shi)驗(yan)機、振動(dong)(dong)試(shi)(shi)驗(yan)臺、沖(chong)擊(ji)試(shi)(shi)驗(yan)臺、沖(chong)擊(ji)試(shi)(shi)驗(yan)機、老化房、恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕試(shi)(shi)驗(yan)室(shi)、恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕機、快速溫變(bian)試(shi)(shi)驗(yan)箱(xiang)(xiang)、高低溫試(shi)(shi)驗(yan)箱(xiang)(xiang)、冷熱沖(chong)擊(ji)試(shi)(shi)驗(yan)箱(xiang)(xiang)、冷熱沖(chong)擊(ji)箱(xiang)(xiang)、恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕箱(xiang)(xiang)、恒(heng)(heng)(heng)溫恒(heng)(heng)(heng)濕試(shi)(shi)驗(yan)箱(xiang)(xiang)等產(chan)品。