恒(heng)溫(wen)(wen)恒(heng)濕(shi)(shi)試(shi)(shi)驗(yan)室即步入(ru)式恒(heng)溫(wen)(wen)恒(heng)濕(shi)(shi)箱(xiang)，用(yong)于(yu)大型(xing)工(gong)業設備，航天材料，汽車配(pei)(pei)件，儀器儀表，家用(yong)電(dian)器，計算機，家具，終(zhong)端機，電(dian)子(zi)電(dian)工(gong)，電(dian)池(chi)，電(dian)路板，顯示(shi)器，液(ye)晶屏，LED照明，半導體(ti)光電(dian)，LCD液(ye)晶模(mo)(mo)組，光纖通訊，電(dian)子(zi)產品，電(dian)源供應器，主機板，等各種大型(xing)材料及(ji)配(pei)(pei)件或成品進(jin)行高(gao)低溫(wen)(wen)交(jiao)變濕(shi)(shi)熱(re)，高(gao)低溫(wen)(wen)老化(hua)，恒(heng)溫(wen)(wen)恒(heng)濕(shi)(shi)，高(gao)溫(wen)(wen)高(gao)濕(shi)(shi)試(shi)(shi)驗(yan)，濕(shi)(shi)熱(re)老化(hua)試(shi)(shi)驗(yan)等。通過恒(heng)溫(wen)(wen)恒(heng)濕(shi)(shi)試(shi)(shi)驗(yan)室進(jin)行環(huan)境模(mo)(mo)擬后，用(yong)以評(ping)估產品及(ji)材料的可靠性認證。

下(xia)面由恒(heng)(heng)溫恒(heng)(heng)濕試驗室廠家（東(dong)莞(guan)市科文試驗設備有(you)限(xian)公(gong)司）為大家講解下(xia)步入(ru)式恒(heng)(heng)溫恒(heng)(heng)濕箱的結構(gou)設計，及(ji)恒(heng)(heng)溫恒(heng)(heng)濕試驗室工(gong)作(zuo)原理：

恒溫恒濕試驗室的控制部分設計在設備的右側，分布有溫控儀、控制開關等，操作方便，簡單，易于維護。
本設備(bei)選用(yong)材(cai)料，使用(yong)國內目前的加工設備(bei)加工成型，采用(yong)聚氨發泡不銹鋼板(ban)拼接而成，美觀(guan)，平整。顏(yan)色搭配協調，棱角型設計(ji)，線條流暢自然，設計(ji)合理，經久耐用(yong)。設備(bei)在符(fu)合國家標準(zhun)的前提下，各方面性(xing)能都穩定的基礎上(shang)更(geng)具備(bei)實用(yong)性(xing)和便(bian)于控(kong)制。并且，該設備(bei)具有(you)容易安裝、操作簡單(dan)，基本上(shang)不需(xu)要日常維護(hu)等特點。

1.傳感器
傳感器主要是溫度和濕度傳感器。溫度傳感器應用較多的是鉑電組和熱電偶。濕度的測量方法有兩種：干濕球溫度計法和固態電子式傳感器直接測量法。由于干濕球法測量精度不高，現在的恒溫恒濕箱正逐步的以固態傳感器代替干濕球來進行濕度的測量。
2.加熱
恒溫恒濕試驗室的加熱系統相對制冷系統而言，是比較簡單。它主要有大功率電阻絲組成，由于試驗箱要求的升溫速率較大，因此試驗箱的加熱系統功率都比較大，而且在試驗箱的底板也設有加熱器。
3.控制
控制系統是恒溫恒濕試驗室的核心，它決定了試驗室的升溫速率，精度等重要指標。現在試驗室的控制器大都采用PID控制，也有少部分采用PID與模糊控制相組合的控制方式。由于控制系統基本上屬于軟件的范疇，而且此部分在使用過程中，一般不會出現問題。
4.送風循環
空氣循環系統正常情況下由離心式風扇和驅動其運轉的電機構成。它提供了恒溫恒濕試驗室內空氣的循環。
5.制冷
制冷系統是步入式恒溫恒濕箱的關鍵部分之一。一般來說，制冷方式都是機械制冷以及輔助液氮制冷，機械制冷采用蒸汽壓縮式制冷，它們主要由壓縮機，冷凝器，節流機構和蒸發器組成。如果我們試驗的溫度低溫要達到-55℃，單級制冷難以滿足要求，因此恒溫恒濕箱的制冷方式一般采用復疊式制冷。恒溫恒濕箱的制冷系統由兩部分組成，分別稱為高溫部分和低溫部分，每一部分是一個相對獨立的制冷系統。高溫部分中制冷劑的蒸發吸收來自低溫部分的制冷劑的熱量而汽化;低溫部分制冷劑的蒸發則從被冷卻的對象（試驗箱內的空氣）吸熱以獲取冷量。高溫部分和低溫部分之間是用一個蒸發冷凝器起來，它既是高溫部分的冷凝器，也是低溫部分的冷凝器。
6.濕度
溫度系統分為加濕和除濕兩個子系統。加濕方式一般采用蒸汽加濕法，即將低壓蒸汽直接注入試驗空間加濕。這種加濕方法加濕能力，速度快，加濕控制靈敏，尤其在降溫時容易實現強制加濕。
除(chu)(chu)(chu)濕(shi)方式(shi)有兩種：機械制冷除(chu)(chu)(chu)濕(shi)和(he)干(gan)(gan)(gan)燥(zao)除(chu)(chu)(chu)濕(shi)。機械制冷除(chu)(chu)(chu)濕(shi)的(de)除(chu)(chu)(chu)濕(shi)原(yuan)理是(shi)將空(kong)氣冷卻到(dao)露點溫度以下，使大于飽和(he)含濕(shi)量的(de)水汽凝結(jie)析出(chu)，這樣就(jiu)降低了濕(shi)度。干(gan)(gan)(gan)燥(zao)器(qi)除(chu)(chu)(chu)濕(shi)是(shi)利(li)用(yong)氣泵將試(shi)驗(yan)箱內的(de)空(kong)氣抽出(chu)，并將干(gan)(gan)(gan)燥(zao)的(de)空(kong)氣注(zhu)入(ru)，同時將濕(shi)空(kong)氣送(song)入(ru)可循環(huan)利(li)用(yong)的(de)干(gan)(gan)(gan)燥(zao)進行(xing)干(gan)(gan)(gan)燥(zao)，干(gan)(gan)(gan)燥(zao)完后(hou)又(you)送(song)入(ru)試(shi)驗(yan)箱內，如此反復(fu)循環(huan)進行(xing)除(chu)(chu)(chu)濕(shi)。現在大部分綜合試(shi)驗(yan)箱采用(yong)前一種除(chu)(chu)(chu)濕(shi)方式(shi)法，后(hou)一種的(de)除(chu)(chu)(chu)濕(shi)方法，可以使露點溫度達到(dao)0℃一下。適用(yong)于有特殊要求的(de)場合，但費用(yong)較貴。

科文公司主營:
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