大連車載空調由壓(ya)(ya)(ya)(ya)縮(suo)機(ji)(ji)(ji)(ji)、冷(leng)(leng)(leng)凝器(qi)(qi)、節(jie)流元件、蒸發(fa)器(qi)(qi)、風機(ji)(ji)(ji)(ji)及(ji)必要的(de)(de)(de)控制(zhi)(zhi)部(bu)件構(gou)成，用(yong)(yong)于調(diao)(diao)節(jie)車(che)內(nei)(nei)溫(wen)度、濕(shi)度，給(gei)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。當(dang)壓(ya)(ya)(ya)(ya)縮(suo)機(ji)(ji)(ji)(ji)工(gong)作時，壓(ya)(ya)(ya)(ya)縮(suo)機(ji)(ji)(ji)(ji)吸(xi)入從(cong)蒸發(fa)器(qi)(qi)出(chu)來的(de)(de)(de)低溫(wen)低壓(ya)(ya)(ya)(ya)的(de)(de)(de)氣(qi)(qi)態制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)，經壓(ya)(ya)(ya)(ya)縮(suo)，制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)的(de)(de)(de)溫(wen)度和壓(ya)(ya)(ya)(ya)力(li)升(sheng)高(gao)，并被送入冷(leng)(leng)(leng)凝器(qi)(qi)。在(zai)冷(leng)(leng)(leng)凝器(qi)(qi)內(nei)(nei)，高(gao)溫(wen)高(gao)壓(ya)(ya)(ya)(ya)的(de)(de)(de)氣(qi)(qi)態制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)把熱量(liang)(liang)傳(chuan)遞給(gei)經過(guo)冷(leng)(leng)(leng)凝器(qi)(qi)的(de)(de)(de)車(che)外空(kong)(kong)(kong)(kong)氣(qi)(qi)而液化，變成液體。液態制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)流經節(jie)流裝置時，溫(wen)度和壓(ya)(ya)(ya)(ya)力(li)降(jiang)低，并進(jin)(jin)(jin)入蒸發(fa)器(qi)(qi)。在(zai)蒸發(fa)器(qi)(qi)內(nei)(nei)，低溫(wen)低壓(ya)(ya)(ya)(ya)的(de)(de)(de)液態制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)吸(xi)收經過(guo)蒸發(fa)器(qi)(qi)的(de)(de)(de)車(che)內(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)熱量(liang)(liang)而蒸發(fa)，變成氣(qi)(qi)體。氣(qi)(qi)體又被壓(ya)(ya)(ya)(ya)縮(suo)機(ji)(ji)(ji)(ji)吸(xi)入進(jin)(jin)(jin)行下一(yi)輪循(xun)(xun)環。這樣，通過(guo)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)在(zai)系統內(nei)(nei)的(de)(de)(de)循(xun)(xun)環，不斷(duan)吸(xi)收車(che)內(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)熱量(liang)(liang)并排(pai)到車(che)外空(kong)(kong)(kong)(kong)氣(qi)(qi)中(zhong)，使車(che)內(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)溫(wen)度逐(zhu)漸下降(jiang)。內(nei)(nei)循(xun)(xun)環可以提(ti)高(gao)空(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)(xiao)果(guo)(guo)，相當(dang)于把室內(nei)(nei)冷(leng)(leng)(leng)空(kong)(kong)(kong)(kong)氣(qi)(qi)再制(zhi)(zhi)冷(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)(xiao)果(guo)(guo)當(dang)然更好了(le)。不過(guo)長時間(jian)使用(yong)(yong)內(nei)(nei)循(xun)(xun)環會(hui)使車(che)內(nei)(nei)的(de)(de)(de)空(kong)(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)降(jiang)低，可能(neng)讓人(ren)感覺(jue)頭昏腦漲。應當(dang)開一(yi)會(hui)兒(er)內(nei)(nei)循(xun)(xun)環就(jiu)使用(yong)(yong)幾分鐘外循(xun)(xun)環，讓新鮮空(kong)(kong)(kong)(kong)氣(qi)(qi)進(jin)(jin)(jin)入車(che)內(nei)(nei)，改善(shan)空(kong)(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)。如果(guo)(guo)空(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)外循(xun)(xun)環開關是機(ji)(ji)(ji)(ji)械式的(de)(de)(de)撥(bo)桿而非按鈕，可以把撥(bo)桿放在(zai)內(nei)(nei)外循(xun)(xun)環的(de)(de)(de)中(zhong)間(jian)，讓車(che)外空(kong)(kong)(kong)(kong)氣(qi)(qi)適(shi)量(liang)(liang)進(jin)(jin)(jin)入，既能(neng)提(ti)升(sheng)空(kong)(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)，又能(neng)提(ti)高(gao)空(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)(xiao)果(guo)(guo)。此(ci)外，在(zai)使用(yong)(yong)空(kong)(kong)(kong)(kong)調(diao)(diao)除霜除霧時，要使用(yong)(yong)外循(xun)(xun)環才(cai)有效(xiao)(xiao)。