大連車載空調由壓縮(suo)(suo)機(ji)、冷(leng)凝(ning)(ning)器(qi)、節(jie)(jie)流(liu)元(yuan)件(jian)、蒸發(fa)(fa)器(qi)、風機(ji)及(ji)必要的(de)(de)控制(zhi)(zhi)(zhi)部件(jian)構成，用(yong)(yong)于(yu)調(diao)(diao)(diao)節(jie)(jie)車內(nei)(nei)溫(wen)(wen)度、濕度，給(gei)乘員提供舒適環(huan)(huan)境的(de)(de)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)系統。當(dang)壓縮(suo)(suo)機(ji)工(gong)作時(shi)，壓縮(suo)(suo)機(ji)吸(xi)入從蒸發(fa)(fa)器(qi)出來的(de)(de)低溫(wen)(wen)低壓的(de)(de)氣(qi)(qi)(qi)態(tai)制(zhi)(zhi)(zhi)冷(leng)劑(ji)，經壓縮(suo)(suo)，制(zhi)(zhi)(zhi)冷(leng)劑(ji)的(de)(de)溫(wen)(wen)度和壓力升(sheng)高，并(bing)被(bei)(bei)送入冷(leng)凝(ning)(ning)器(qi)。在(zai)(zai)冷(leng)凝(ning)(ning)器(qi)內(nei)(nei)，高溫(wen)(wen)高壓的(de)(de)氣(qi)(qi)(qi)態(tai)制(zhi)(zhi)(zhi)冷(leng)劑(ji)把(ba)熱量(liang)(liang)傳遞給(gei)經過(guo)冷(leng)凝(ning)(ning)器(qi)的(de)(de)車外(wai)(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)而(er)液(ye)化，變(bian)成液(ye)體。液(ye)態(tai)制(zhi)(zhi)(zhi)冷(leng)劑(ji)流(liu)經節(jie)(jie)流(liu)裝(zhuang)置時(shi)，溫(wen)(wen)度和壓力降低，并(bing)進(jin)入蒸發(fa)(fa)器(qi)。在(zai)(zai)蒸發(fa)(fa)器(qi)內(nei)(nei)，低溫(wen)(wen)低壓的(de)(de)液(ye)態(tai)制(zhi)(zhi)(zhi)冷(leng)劑(ji)吸(xi)收經過(guo)蒸發(fa)(fa)器(qi)的(de)(de)車內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)熱量(liang)(liang)而(er)蒸發(fa)(fa)，變(bian)成氣(qi)(qi)(qi)體。氣(qi)(qi)(qi)體又被(bei)(bei)壓縮(suo)(suo)機(ji)吸(xi)入進(jin)行下(xia)一輪循(xun)(xun)環(huan)(huan)。這樣(yang)，通過(guo)制(zhi)(zhi)(zhi)冷(leng)劑(ji)在(zai)(zai)系統內(nei)(nei)的(de)(de)循(xun)(xun)環(huan)(huan)，不斷吸(xi)收車內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)熱量(liang)(liang)并(bing)排(pai)到車外(wai)(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)中，使(shi)(shi)車內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)溫(wen)(wen)度逐漸下(xia)降。內(nei)(nei)循(xun)(xun)環(huan)(huan)可(ke)以(yi)提高空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效果(guo)，相當(dang)于(yu)把(ba)室內(nei)(nei)冷(leng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)再制(zhi)(zhi)(zhi)冷(leng)，空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效果(guo)當(dang)然更好了。不過(guo)長時(shi)間使(shi)(shi)用(yong)(yong)內(nei)(nei)循(xun)(xun)環(huan)(huan)會使(shi)(shi)車內(nei)(nei)的(de)(de)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量(liang)(liang)降低，可(ke)能讓人感覺頭昏(hun)腦漲(zhang)。應(ying)當(dang)開(kai)一會兒內(nei)(nei)循(xun)(xun)環(huan)(huan)就使(shi)(shi)用(yong)(yong)幾分鐘外(wai)(wai)循(xun)(xun)環(huan)(huan)，讓新鮮空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)進(jin)入車內(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量(liang)(liang)。如果(guo)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)內(nei)(nei)外(wai)(wai)循(xun)(xun)環(huan)(huan)開(kai)關是機(ji)械(xie)式的(de)(de)撥桿(gan)而(er)非按鈕，可(ke)以(yi)把(ba)撥桿(gan)放在(zai)(zai)內(nei)(nei)外(wai)(wai)循(xun)(xun)環(huan)(huan)的(de)(de)中間，讓車外(wai)(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)適量(liang)(liang)進(jin)入，既能提升(sheng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量(liang)(liang)，又能提高空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效果(guo)。此外(wai)(wai)，在(zai)(zai)使(shi)(shi)用(yong)(yong)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)除霜除霧時(shi)，要使(shi)(shi)用(yong)(yong)外(wai)(wai)循(xun)(xun)環(huan)(huan)才有效。