升降爐是一種外形和爐膛都為箱形的電爐，在工件進行熱處理實驗的整個加熱過程中工件是固定不動的，只需打開爐門，把需要實驗的工具整齊的放進爐膛中間，然后關上爐門即可。取工件時也是打開爐門，取出工件，關上爐門即可。它的升溫程序在出廠前都是已經編制好的，用戶在使用時按照說明書的操作步驟來操作即可。

　　升(sheng)降爐也有(you)“三高(gao)(gao)”？很多人(ren)肯定不明白這(zhe)(zhe)是怎么(me)回(hui)事，“三高(gao)(gao)”指的(de)是什么(me)呢(ni)？指的(de)是控溫(wen)精度高(gao)(gao)、節能效率高(gao)(gao)、安全性能高(gao)(gao)。為什么(me)這(zhe)(zhe)么(me)說(shuo)呢(ni)？下面就(jiu)從該設備的(de)特點來分析一下它(ta)為什么(me)有(you)這(zhe)(zhe)三高(gao)(gao)：

　　1、該設備采用閉(bi)環(huan)技(ji)術可控(kong)硅模塊觸發(fa)控(kong)制(zhi)，移相觸發(fa)控(kong)制(zhi)方式，輸出(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)、電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)或(huo)功率連續可調(diao)，具有恒電(dian)(dian)(dian)(dian)(dian)壓(ya)、恒電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)或(huo)恒功率的(de)特性；電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)環(huan)為(wei)(wei)內環(huan)，電(dian)(dian)(dian)(dian)(dian)壓(ya)環(huan)為(wei)(wei)外環(huan)，在(zai)突加(jia)負(fu)載(zai)或(huo)負(fu)載(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)超過限(xian)流(liu)(liu)值時(shi)，限(xian)制(zhi)調(diao)壓(ya)器的(de)輸出(chu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)在(zai)額定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)范圍內，確保輸出(chu)和調(diao)壓(ya)器正常(chang)(chang)工(gong)作；同時(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)環(huan)也參與(yu)調(diao)節，使調(diao)壓(ya)器的(de)輸出(chu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)被限(xian)制(zhi)在(zai)額定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)范圍內，在(zai)有充分(fen)調(diao)節余量(liang)的(de)前提下維(wei)持輸出(chu)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)及電(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)恒定(ding)；從而到達保護發(fa)熱元(yuan)件(jian)避免過大電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)、電(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)沖擊(ji)，達到安全可靠(kao)的(de)控(kong)制(zhi)效果及控(kong)制(zhi)精度(du)(du)。控(kong)溫精度(du)(du)可達±1度(du)(du)，控(kong)溫精度(du)(du)非常(chang)(chang)高。

　　2、采用三層保溫，分別為：硅(gui)酸鋁纖維板、氧化鋁纖維板、氧化鋁（多晶(jing)）纖維板，節(jie)能效(xiao)(xiao)果是老式電(dian)爐的(de)80%以上。節(jie)能效(xiao)(xiao)率非(fei)常高。

　　3、其外殼具有隔熱功能，就算長期使用，外殼溫度也(ye)不(bu)(bu)會45度，就算操(cao)作人(ren)員不(bu)(bu)小(xiao)心觸碰到(dao)外殼也(ye)不(bu)(bu)會造(zao)成人(ren)員燙傷，安全性能非常高。