大連車載空調由壓(ya)(ya)縮機(ji)、冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)、節流元件(jian)、蒸(zheng)(zheng)發(fa)(fa)器(qi)、風機(ji)及必要的(de)(de)(de)控制(zhi)(zhi)部(bu)件(jian)構成(cheng)(cheng)，用(yong)于(yu)調(diao)(diao)節車內(nei)(nei)(nei)溫(wen)度(du)(du)、濕度(du)(du)，給乘員提(ti)供舒(shu)適(shi)環境的(de)(de)(de)空(kong)(kong)(kong)(kong)調(diao)(diao)系統(tong)。當壓(ya)(ya)縮機(ji)工(gong)作時(shi)，壓(ya)(ya)縮機(ji)吸入(ru)(ru)從蒸(zheng)(zheng)發(fa)(fa)器(qi)出(chu)來的(de)(de)(de)低(di)溫(wen)低(di)壓(ya)(ya)的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)，經壓(ya)(ya)縮，制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)的(de)(de)(de)溫(wen)度(du)(du)和(he)壓(ya)(ya)力升(sheng)高，并被送入(ru)(ru)冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)。在(zai)冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)內(nei)(nei)(nei)，高溫(wen)高壓(ya)(ya)的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)把熱量(liang)(liang)傳(chuan)遞給經過(guo)冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)的(de)(de)(de)車外空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)而(er)液化(hua)，變成(cheng)(cheng)液體。液態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)流經節流裝置時(shi)，溫(wen)度(du)(du)和(he)壓(ya)(ya)力降低(di)，并進入(ru)(ru)蒸(zheng)(zheng)發(fa)(fa)器(qi)。在(zai)蒸(zheng)(zheng)發(fa)(fa)器(qi)內(nei)(nei)(nei)，低(di)溫(wen)低(di)壓(ya)(ya)的(de)(de)(de)液態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)吸收經過(guo)蒸(zheng)(zheng)發(fa)(fa)器(qi)的(de)(de)(de)車內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)熱量(liang)(liang)而(er)蒸(zheng)(zheng)發(fa)(fa)，變成(cheng)(cheng)氣(qi)(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)(qi)體又被壓(ya)(ya)縮機(ji)吸入(ru)(ru)進行下(xia)一輪循(xun)(xun)(xun)(xun)環。這(zhe)樣(yang)，通(tong)過(guo)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)在(zai)系統(tong)內(nei)(nei)(nei)的(de)(de)(de)循(xun)(xun)(xun)(xun)環，不(bu)斷吸收車內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)熱量(liang)(liang)并排到(dao)車外空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)，使車內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)溫(wen)度(du)(du)逐漸下(xia)降。內(nei)(nei)(nei)循(xun)(xun)(xun)(xun)環可以提(ti)高空(kong)(kong)(kong)(kong)調(diao)(diao)效果(guo)，相(xiang)當于(yu)把室內(nei)(nei)(nei)冷(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)再制(zhi)(zhi)冷(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)調(diao)(diao)效果(guo)當然(ran)更好了(le)。不(bu)過(guo)長時(shi)間使用(yong)內(nei)(nei)(nei)循(xun)(xun)(xun)(xun)環會使車內(nei)(nei)(nei)的(de)(de)(de)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)降低(di)，可能讓人感覺頭昏腦(nao)漲(zhang)。應(ying)當開一會兒內(nei)(nei)(nei)循(xun)(xun)(xun)(xun)環就使用(yong)幾分鐘外循(xun)(xun)(xun)(xun)環，讓新鮮空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)進入(ru)(ru)車內(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)。如果(guo)空(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)(nei)外循(xun)(xun)(xun)(xun)環開關是機(ji)械式的(de)(de)(de)撥桿而(er)非按鈕，可以把撥桿放在(zai)內(nei)(nei)(nei)外循(xun)(xun)(xun)(xun)環的(de)(de)(de)中(zhong)間，讓車外空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)適(shi)量(liang)(liang)進入(ru)(ru)，既能提(ti)升(sheng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)，又能提(ti)高空(kong)(kong)(kong)(kong)調(diao)(diao)效果(guo)。此(ci)外，在(zai)使用(yong)空(kong)(kong)(kong)(kong)調(diao)(diao)除霜(shuang)除霧時(shi)，要使用(yong)外循(xun)(xun)(xun)(xun)環才(cai)有(you)效。