大連車載空調由壓(ya)縮機、冷(leng)凝器(qi)、節流元件(jian)、蒸(zheng)(zheng)發(fa)器(qi)、風(feng)機及必要(yao)的(de)(de)控(kong)制(zhi)(zhi)(zhi)部件(jian)構成，用(yong)于調節車(che)內(nei)(nei)(nei)溫(wen)度(du)、濕(shi)度(du)，給(gei)乘員提(ti)供舒適環(huan)(huan)境的(de)(de)空(kong)(kong)(kong)調系統(tong)。當壓(ya)縮機工作時，壓(ya)縮機吸(xi)(xi)入從蒸(zheng)(zheng)發(fa)器(qi)出來(lai)的(de)(de)低溫(wen)低壓(ya)的(de)(de)氣(qi)(qi)態(tai)制(zhi)(zhi)(zhi)冷(leng)劑，經壓(ya)縮，制(zhi)(zhi)(zhi)冷(leng)劑的(de)(de)溫(wen)度(du)和(he)壓(ya)力(li)升高(gao)，并(bing)被送入冷(leng)凝器(qi)。在(zai)(zai)(zai)冷(leng)凝器(qi)內(nei)(nei)(nei)，高(gao)溫(wen)高(gao)壓(ya)的(de)(de)氣(qi)(qi)態(tai)制(zhi)(zhi)(zhi)冷(leng)劑把熱(re)量傳遞給(gei)經過冷(leng)凝器(qi)的(de)(de)車(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)而(er)液化，變成液體(ti)。液態(tai)制(zhi)(zhi)(zhi)冷(leng)劑流經節流裝置時，溫(wen)度(du)和(he)壓(ya)力(li)降(jiang)低，并(bing)進(jin)入蒸(zheng)(zheng)發(fa)器(qi)。在(zai)(zai)(zai)蒸(zheng)(zheng)發(fa)器(qi)內(nei)(nei)(nei)，低溫(wen)低壓(ya)的(de)(de)液態(tai)制(zhi)(zhi)(zhi)冷(leng)劑吸(xi)(xi)收經過蒸(zheng)(zheng)發(fa)器(qi)的(de)(de)車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)熱(re)量而(er)蒸(zheng)(zheng)發(fa)，變成氣(qi)(qi)體(ti)。氣(qi)(qi)體(ti)又(you)被壓(ya)縮機吸(xi)(xi)入進(jin)行(xing)下(xia)一輪循(xun)環(huan)(huan)。這樣，通過制(zhi)(zhi)(zhi)冷(leng)劑在(zai)(zai)(zai)系統(tong)內(nei)(nei)(nei)的(de)(de)循(xun)環(huan)(huan)，不(bu)斷吸(xi)(xi)收車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)熱(re)量并(bing)排到車(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)中，使車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)溫(wen)度(du)逐漸下(xia)降(jiang)。內(nei)(nei)(nei)循(xun)環(huan)(huan)可以提(ti)高(gao)空(kong)(kong)(kong)調效果(guo)，相當于把室內(nei)(nei)(nei)冷(leng)空(kong)(kong)(kong)氣(qi)(qi)再(zai)制(zhi)(zhi)(zhi)冷(leng)，空(kong)(kong)(kong)調效果(guo)當然更(geng)好了。不(bu)過長(chang)時間(jian)使用(yong)內(nei)(nei)(nei)循(xun)環(huan)(huan)會(hui)使車(che)內(nei)(nei)(nei)的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)質(zhi)(zhi)量降(jiang)低，可能(neng)(neng)讓人(ren)感覺頭(tou)昏腦漲。應當開一會(hui)兒內(nei)(nei)(nei)循(xun)環(huan)(huan)就(jiu)使用(yong)幾分(fen)鐘(zhong)外(wai)循(xun)環(huan)(huan)，讓新鮮空(kong)(kong)(kong)氣(qi)(qi)進(jin)入車(che)內(nei)(nei)(nei)，改(gai)善空(kong)(kong)(kong)氣(qi)(qi)質(zhi)(zhi)量。如(ru)果(guo)空(kong)(kong)(kong)調內(nei)(nei)(nei)外(wai)循(xun)環(huan)(huan)開關是機械(xie)式(shi)的(de)(de)撥桿而(er)非按鈕，可以把撥桿放在(zai)(zai)(zai)內(nei)(nei)(nei)外(wai)循(xun)環(huan)(huan)的(de)(de)中間(jian)，讓車(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)適量進(jin)入，既能(neng)(neng)提(ti)升空(kong)(kong)(kong)氣(qi)(qi)質(zhi)(zhi)量，又(you)能(neng)(neng)提(ti)高(gao)空(kong)(kong)(kong)調效果(guo)。此外(wai)，在(zai)(zai)(zai)使用(yong)空(kong)(kong)(kong)調除霜除霧(wu)時，要(yao)使用(yong)外(wai)循(xun)環(huan)(huan)才(cai)有(you)效。