大連車載空調由壓(ya)(ya)(ya)縮(suo)機、冷凝(ning)(ning)器(qi)(qi)(qi)(qi)、節(jie)(jie)流(liu)元件、蒸發器(qi)(qi)(qi)(qi)、風機及必要的(de)(de)(de)(de)控制(zhi)(zhi)(zhi)部(bu)件構成(cheng)(cheng)，用(yong)(yong)于(yu)調節(jie)(jie)車(che)內(nei)(nei)(nei)(nei)溫(wen)度(du)、濕度(du)，給乘(cheng)員提供舒適環(huan)境的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)調系(xi)(xi)統(tong)。當壓(ya)(ya)(ya)縮(suo)機工作(zuo)時(shi)，壓(ya)(ya)(ya)縮(suo)機吸入(ru)(ru)從(cong)蒸發器(qi)(qi)(qi)(qi)出來的(de)(de)(de)(de)低溫(wen)低壓(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)態(tai)(tai)制(zhi)(zhi)(zhi)冷劑(ji)，經(jing)(jing)壓(ya)(ya)(ya)縮(suo)，制(zhi)(zhi)(zhi)冷劑(ji)的(de)(de)(de)(de)溫(wen)度(du)和壓(ya)(ya)(ya)力(li)升高(gao)，并被送(song)入(ru)(ru)冷凝(ning)(ning)器(qi)(qi)(qi)(qi)。在(zai)(zai)冷凝(ning)(ning)器(qi)(qi)(qi)(qi)內(nei)(nei)(nei)(nei)，高(gao)溫(wen)高(gao)壓(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)態(tai)(tai)制(zhi)(zhi)(zhi)冷劑(ji)把熱(re)量傳遞給經(jing)(jing)過冷凝(ning)(ning)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)而(er)(er)液(ye)化，變成(cheng)(cheng)液(ye)體。液(ye)態(tai)(tai)制(zhi)(zhi)(zhi)冷劑(ji)流(liu)經(jing)(jing)節(jie)(jie)流(liu)裝置時(shi)，溫(wen)度(du)和壓(ya)(ya)(ya)力(li)降低，并進入(ru)(ru)蒸發器(qi)(qi)(qi)(qi)。在(zai)(zai)蒸發器(qi)(qi)(qi)(qi)內(nei)(nei)(nei)(nei)，低溫(wen)低壓(ya)(ya)(ya)的(de)(de)(de)(de)液(ye)態(tai)(tai)制(zhi)(zhi)(zhi)冷劑(ji)吸收經(jing)(jing)過蒸發器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)熱(re)量而(er)(er)蒸發，變成(cheng)(cheng)氣(qi)(qi)體。氣(qi)(qi)體又被壓(ya)(ya)(ya)縮(suo)機吸入(ru)(ru)進行下(xia)一(yi)輪(lun)循(xun)(xun)(xun)環(huan)。這樣，通(tong)過制(zhi)(zhi)(zhi)冷劑(ji)在(zai)(zai)系(xi)(xi)統(tong)內(nei)(nei)(nei)(nei)的(de)(de)(de)(de)循(xun)(xun)(xun)環(huan)，不(bu)斷吸收車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)熱(re)量并排到車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)中，使車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)溫(wen)度(du)逐漸下(xia)降。內(nei)(nei)(nei)(nei)循(xun)(xun)(xun)環(huan)可以提高(gao)空(kong)(kong)(kong)(kong)(kong)調效果(guo)(guo)，相(xiang)當于(yu)把室內(nei)(nei)(nei)(nei)冷空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)再(zai)制(zhi)(zhi)(zhi)冷，空(kong)(kong)(kong)(kong)(kong)調效果(guo)(guo)當然更好了(le)。不(bu)過長(chang)時(shi)間(jian)使用(yong)(yong)內(nei)(nei)(nei)(nei)循(xun)(xun)(xun)環(huan)會使車(che)內(nei)(nei)(nei)(nei)的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質(zhi)量降低，可能讓(rang)人感覺頭昏腦漲。應當開一(yi)會兒內(nei)(nei)(nei)(nei)循(xun)(xun)(xun)環(huan)就使用(yong)(yong)幾分鐘外(wai)循(xun)(xun)(xun)環(huan)，讓(rang)新鮮空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)進入(ru)(ru)車(che)內(nei)(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質(zhi)量。如果(guo)(guo)空(kong)(kong)(kong)(kong)(kong)調內(nei)(nei)(nei)(nei)外(wai)循(xun)(xun)(xun)環(huan)開關是機械(xie)式的(de)(de)(de)(de)撥桿而(er)(er)非按鈕，可以把撥桿放在(zai)(zai)內(nei)(nei)(nei)(nei)外(wai)循(xun)(xun)(xun)環(huan)的(de)(de)(de)(de)中間(jian)，讓(rang)車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)適量進入(ru)(ru)，既(ji)能提升空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質(zhi)量，又能提高(gao)空(kong)(kong)(kong)(kong)(kong)調效果(guo)(guo)。此外(wai)，在(zai)(zai)使用(yong)(yong)空(kong)(kong)(kong)(kong)(kong)調除霜除霧時(shi)，要使用(yong)(yong)外(wai)循(xun)(xun)(xun)環(huan)才有效。