大連車載空調由壓(ya)(ya)(ya)縮機(ji)、冷(leng)凝(ning)器(qi)(qi)、節(jie)流(liu)元件(jian)、蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)、風機(ji)及必要(yao)的(de)(de)控制(zhi)部件(jian)構(gou)成，用(yong)于調(diao)節(jie)車(che)內(nei)(nei)(nei)(nei)溫(wen)度、濕度，給(gei)乘(cheng)員提(ti)供(gong)舒適環(huan)境的(de)(de)空(kong)(kong)調(diao)系(xi)統。當(dang)壓(ya)(ya)(ya)縮機(ji)工作(zuo)時(shi)，壓(ya)(ya)(ya)縮機(ji)吸入(ru)(ru)從蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)出(chu)來(lai)的(de)(de)低(di)(di)溫(wen)低(di)(di)壓(ya)(ya)(ya)的(de)(de)氣(qi)(qi)(qi)(qi)(qi)態制(zhi)冷(leng)劑，經(jing)壓(ya)(ya)(ya)縮，制(zhi)冷(leng)劑的(de)(de)溫(wen)度和壓(ya)(ya)(ya)力升高，并(bing)被送入(ru)(ru)冷(leng)凝(ning)器(qi)(qi)。在冷(leng)凝(ning)器(qi)(qi)內(nei)(nei)(nei)(nei)，高溫(wen)高壓(ya)(ya)(ya)的(de)(de)氣(qi)(qi)(qi)(qi)(qi)態制(zhi)冷(leng)劑把熱(re)(re)量(liang)(liang)(liang)傳遞(di)給(gei)經(jing)過(guo)冷(leng)凝(ning)器(qi)(qi)的(de)(de)車(che)外(wai)(wai)(wai)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)而(er)液(ye)(ye)化，變成液(ye)(ye)體(ti)。液(ye)(ye)態制(zhi)冷(leng)劑流(liu)經(jing)節(jie)流(liu)裝置(zhi)時(shi)，溫(wen)度和壓(ya)(ya)(ya)力降(jiang)低(di)(di)，并(bing)進(jin)入(ru)(ru)蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)。在蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)內(nei)(nei)(nei)(nei)，低(di)(di)溫(wen)低(di)(di)壓(ya)(ya)(ya)的(de)(de)液(ye)(ye)態制(zhi)冷(leng)劑吸收(shou)經(jing)過(guo)蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)的(de)(de)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)熱(re)(re)量(liang)(liang)(liang)而(er)蒸(zheng)(zheng)發(fa)(fa)，變成氣(qi)(qi)(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)(qi)(qi)體(ti)又被壓(ya)(ya)(ya)縮機(ji)吸入(ru)(ru)進(jin)行下一輪(lun)循(xun)(xun)環(huan)。這樣，通過(guo)制(zhi)冷(leng)劑在系(xi)統內(nei)(nei)(nei)(nei)的(de)(de)循(xun)(xun)環(huan)，不斷吸收(shou)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)熱(re)(re)量(liang)(liang)(liang)并(bing)排到車(che)外(wai)(wai)(wai)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)(zhong)，使(shi)(shi)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)溫(wen)度逐漸下降(jiang)。內(nei)(nei)(nei)(nei)循(xun)(xun)環(huan)可以提(ti)高空(kong)(kong)調(diao)效(xiao)果，相當(dang)于把室內(nei)(nei)(nei)(nei)冷(leng)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)再制(zhi)冷(leng)，空(kong)(kong)調(diao)效(xiao)果當(dang)然更好了(le)。不過(guo)長時(shi)間(jian)使(shi)(shi)用(yong)內(nei)(nei)(nei)(nei)循(xun)(xun)環(huan)會(hui)(hui)使(shi)(shi)車(che)內(nei)(nei)(nei)(nei)的(de)(de)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)降(jiang)低(di)(di)，可能讓人感覺頭昏腦漲(zhang)。應當(dang)開一會(hui)(hui)兒內(nei)(nei)(nei)(nei)循(xun)(xun)環(huan)就(jiu)使(shi)(shi)用(yong)幾分鐘外(wai)(wai)(wai)循(xun)(xun)環(huan)，讓新鮮空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)進(jin)入(ru)(ru)車(che)內(nei)(nei)(nei)(nei)，改善空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)。如果空(kong)(kong)調(diao)內(nei)(nei)(nei)(nei)外(wai)(wai)(wai)循(xun)(xun)環(huan)開關是機(ji)械(xie)式的(de)(de)撥桿而(er)非按鈕，可以把撥桿放(fang)在內(nei)(nei)(nei)(nei)外(wai)(wai)(wai)循(xun)(xun)環(huan)的(de)(de)中(zhong)(zhong)間(jian)，讓車(che)外(wai)(wai)(wai)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)適量(liang)(liang)(liang)進(jin)入(ru)(ru)，既能提(ti)升空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)，又能提(ti)高空(kong)(kong)調(diao)效(xiao)果。此外(wai)(wai)(wai)，在使(shi)(shi)用(yong)空(kong)(kong)調(diao)除霜除霧(wu)時(shi)，要(yao)使(shi)(shi)用(yong)外(wai)(wai)(wai)循(xun)(xun)環(huan)才有效(xiao)。