建立(li)并維持高(gao)低(di)溫試驗箱箱(xiang)(xiang)體(ti)(ti)(ti)內部高(gao)、低溫(wen)(wen)(wen)環境所需(xu)的(de)(de)熱(re)、冷量，是由兩組(zu)氣(qi)(qi)體(ti)(ti)(ti)管(guan)道輸(shu)運的(de)(de)干燥氮氣(qi)(qi)提供的(de)(de)。兩組(zu)管(guan)道分別與試(shi)驗箱(xiang)(xiang)體(ti)(ti)(ti)的(de)(de)頂(ding)部與底部連通。系(xi)統高(gao)溫(wen)(wen)(wen)工況時，高(gao)溫(wen)(wen)(wen)氮氣(qi)(qi)從(cong)(cong)底部風(feng)管(guan)進(jin)入箱(xiang)(xiang)體(ti)(ti)(ti)，在(zai)箱(xiang)(xiang)體(ti)(ti)(ti)內充分換熱(re)后(hou)從(cong)(cong)頂(ding)部風(feng)管(guan)排(pai)出；系(xi)統低溫(wen)(wen)(wen)：工況時，低溫(wen)(wen)(wen)氮氣(qi)(qi)從(cong)(cong)頂(ding)部風(feng)管(guan)進(jin)入箱(xiang)(xiang)體(ti)(ti)(ti)，在(zai)箱(xiang)(xiang)體(ti)(ti)(ti)內充分換熱(re)后(hou)從(cong)(cong)底部風(feng)管(guan)排(pai)出。氮氣(qi)(qi)氣(qi)(qi)源(yuan)來自于試(shi)驗系(xi)統中(zhong)的(de)(de)液氮儲(chu)罐，氮氣(qi)(qi)傳(chuan)輸(shu)工作(zuo)模式由測控(kong)系(xi)統控(kong)制。