大連車載空調由壓(ya)(ya)(ya)(ya)縮機、冷(leng)凝器(qi)(qi)(qi)(qi)、節流(liu)元件、蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)、風機及必要的(de)(de)控制(zhi)(zhi)(zhi)(zhi)部件構成，用(yong)(yong)于調節車(che)內(nei)(nei)溫度(du)(du)、濕(shi)度(du)(du)，給(gei)乘員提供舒適(shi)環(huan)(huan)(huan)境的(de)(de)空(kong)(kong)(kong)調系統(tong)。當壓(ya)(ya)(ya)(ya)縮機工作時，壓(ya)(ya)(ya)(ya)縮機吸入(ru)從蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)出(chu)來的(de)(de)低(di)(di)(di)溫低(di)(di)(di)壓(ya)(ya)(ya)(ya)的(de)(de)氣(qi)(qi)(qi)態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)劑(ji)，經壓(ya)(ya)(ya)(ya)縮，制(zhi)(zhi)(zhi)(zhi)冷(leng)劑(ji)的(de)(de)溫度(du)(du)和(he)(he)壓(ya)(ya)(ya)(ya)力(li)升高(gao)，并被(bei)送入(ru)冷(leng)凝器(qi)(qi)(qi)(qi)。在冷(leng)凝器(qi)(qi)(qi)(qi)內(nei)(nei)，高(gao)溫高(gao)壓(ya)(ya)(ya)(ya)的(de)(de)氣(qi)(qi)(qi)態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)劑(ji)把(ba)熱量(liang)(liang)(liang)(liang)傳遞給(gei)經過冷(leng)凝器(qi)(qi)(qi)(qi)的(de)(de)車(che)外空(kong)(kong)(kong)氣(qi)(qi)(qi)而(er)(er)液(ye)化，變(bian)成液(ye)體。液(ye)態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)劑(ji)流(liu)經節流(liu)裝置時，溫度(du)(du)和(he)(he)壓(ya)(ya)(ya)(ya)力(li)降(jiang)(jiang)低(di)(di)(di)，并進入(ru)蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)。在蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)內(nei)(nei)，低(di)(di)(di)溫低(di)(di)(di)壓(ya)(ya)(ya)(ya)的(de)(de)液(ye)態(tai)(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)劑(ji)吸收(shou)經過蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)的(de)(de)車(che)內(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)熱量(liang)(liang)(liang)(liang)而(er)(er)蒸(zheng)發(fa)，變(bian)成氣(qi)(qi)(qi)體。氣(qi)(qi)(qi)體又(you)被(bei)壓(ya)(ya)(ya)(ya)縮機吸入(ru)進行下一輪循(xun)(xun)(xun)環(huan)(huan)(huan)。這樣，通過制(zhi)(zhi)(zhi)(zhi)冷(leng)劑(ji)在系統(tong)內(nei)(nei)的(de)(de)循(xun)(xun)(xun)環(huan)(huan)(huan)，不(bu)斷吸收(shou)車(che)內(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)熱量(liang)(liang)(liang)(liang)并排到車(che)外空(kong)(kong)(kong)氣(qi)(qi)(qi)中，使(shi)車(che)內(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)溫度(du)(du)逐漸下降(jiang)(jiang)。內(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)可以(yi)提高(gao)空(kong)(kong)(kong)調效果，相當于把(ba)室內(nei)(nei)冷(leng)空(kong)(kong)(kong)氣(qi)(qi)(qi)再制(zhi)(zhi)(zhi)(zhi)冷(leng)，空(kong)(kong)(kong)調效果當然更(geng)好了。不(bu)過長時間使(shi)用(yong)(yong)內(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)會使(shi)車(che)內(nei)(nei)的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)(liang)降(jiang)(jiang)低(di)(di)(di)，可能讓(rang)(rang)人感(gan)覺頭昏(hun)腦漲。應當開一會兒(er)內(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)就使(shi)用(yong)(yong)幾(ji)分鐘(zhong)外循(xun)(xun)(xun)環(huan)(huan)(huan)，讓(rang)(rang)新(xin)鮮空(kong)(kong)(kong)氣(qi)(qi)(qi)進入(ru)車(che)內(nei)(nei)，改善空(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)(liang)。如果空(kong)(kong)(kong)調內(nei)(nei)外循(xun)(xun)(xun)環(huan)(huan)(huan)開關是機械(xie)式的(de)(de)撥(bo)桿而(er)(er)非(fei)按鈕，可以(yi)把(ba)撥(bo)桿放(fang)在內(nei)(nei)外循(xun)(xun)(xun)環(huan)(huan)(huan)的(de)(de)中間，讓(rang)(rang)車(che)外空(kong)(kong)(kong)氣(qi)(qi)(qi)適(shi)量(liang)(liang)(liang)(liang)進入(ru)，既能提升空(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)(liang)，又(you)能提高(gao)空(kong)(kong)(kong)調效果。此外，在使(shi)用(yong)(yong)空(kong)(kong)(kong)調除(chu)霜除(chu)霧時，要使(shi)用(yong)(yong)外循(xun)(xun)(xun)環(huan)(huan)(huan)才有效。