大連車載空調由壓(ya)(ya)(ya)縮(suo)(suo)(suo)機、冷(leng)凝(ning)器(qi)(qi)、節(jie)流元件、蒸發器(qi)(qi)、風機及(ji)必要(yao)的控制(zhi)(zhi)(zhi)(zhi)(zhi)部件構成，用(yong)于調(diao)節(jie)車(che)內(nei)溫(wen)(wen)(wen)(wen)度、濕(shi)度，給(gei)乘員(yuan)提(ti)供舒適環(huan)(huan)(huan)境的空(kong)(kong)(kong)(kong)(kong)調(diao)系(xi)統。當(dang)壓(ya)(ya)(ya)縮(suo)(suo)(suo)機工作時(shi)(shi)(shi)，壓(ya)(ya)(ya)縮(suo)(suo)(suo)機吸(xi)(xi)入(ru)(ru)(ru)(ru)從蒸發器(qi)(qi)出來(lai)的低(di)(di)溫(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)的氣(qi)(qi)態制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)劑，經(jing)壓(ya)(ya)(ya)縮(suo)(suo)(suo)，制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)劑的溫(wen)(wen)(wen)(wen)度和壓(ya)(ya)(ya)力升高，并被送入(ru)(ru)(ru)(ru)冷(leng)凝(ning)器(qi)(qi)。在(zai)冷(leng)凝(ning)器(qi)(qi)內(nei)，高溫(wen)(wen)(wen)(wen)高壓(ya)(ya)(ya)的氣(qi)(qi)態制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)劑把熱(re)量(liang)傳(chuan)遞給(gei)經(jing)過(guo)冷(leng)凝(ning)器(qi)(qi)的車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)而(er)液化，變成液體。液態制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)劑流經(jing)節(jie)流裝置時(shi)(shi)(shi)，溫(wen)(wen)(wen)(wen)度和壓(ya)(ya)(ya)力降低(di)(di)，并進(jin)入(ru)(ru)(ru)(ru)蒸發器(qi)(qi)。在(zai)蒸發器(qi)(qi)內(nei)，低(di)(di)溫(wen)(wen)(wen)(wen)低(di)(di)壓(ya)(ya)(ya)的液態制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)劑吸(xi)(xi)收(shou)經(jing)過(guo)蒸發器(qi)(qi)的車(che)內(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的熱(re)量(liang)而(er)蒸發，變成氣(qi)(qi)體。氣(qi)(qi)體又(you)被壓(ya)(ya)(ya)縮(suo)(suo)(suo)機吸(xi)(xi)入(ru)(ru)(ru)(ru)進(jin)行(xing)下(xia)一(yi)輪循(xun)環(huan)(huan)(huan)。這樣(yang)，通過(guo)制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)劑在(zai)系(xi)統內(nei)的循(xun)環(huan)(huan)(huan)，不(bu)斷(duan)吸(xi)(xi)收(shou)車(che)內(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的熱(re)量(liang)并排(pai)到車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)中，使(shi)(shi)(shi)車(che)內(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的溫(wen)(wen)(wen)(wen)度逐漸下(xia)降。內(nei)循(xun)環(huan)(huan)(huan)可(ke)以提(ti)高空(kong)(kong)(kong)(kong)(kong)調(diao)效果，相當(dang)于把室內(nei)冷(leng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)再(zai)制(zhi)(zhi)(zhi)(zhi)(zhi)冷(leng)，空(kong)(kong)(kong)(kong)(kong)調(diao)效果當(dang)然(ran)更好了(le)。不(bu)過(guo)長(chang)時(shi)(shi)(shi)間使(shi)(shi)(shi)用(yong)內(nei)循(xun)環(huan)(huan)(huan)會使(shi)(shi)(shi)車(che)內(nei)的空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質量(liang)降低(di)(di)，可(ke)能讓(rang)(rang)人感覺頭昏(hun)腦漲。應當(dang)開(kai)一(yi)會兒(er)內(nei)循(xun)環(huan)(huan)(huan)就(jiu)使(shi)(shi)(shi)用(yong)幾分鐘外(wai)循(xun)環(huan)(huan)(huan)，讓(rang)(rang)新鮮空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)進(jin)入(ru)(ru)(ru)(ru)車(che)內(nei)，改(gai)善空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質量(liang)。如(ru)果空(kong)(kong)(kong)(kong)(kong)調(diao)內(nei)外(wai)循(xun)環(huan)(huan)(huan)開(kai)關是機械(xie)式(shi)的撥桿(gan)而(er)非按鈕，可(ke)以把撥桿(gan)放在(zai)內(nei)外(wai)循(xun)環(huan)(huan)(huan)的中間，讓(rang)(rang)車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)適量(liang)進(jin)入(ru)(ru)(ru)(ru)，既(ji)能提(ti)升空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質量(liang)，又(you)能提(ti)高空(kong)(kong)(kong)(kong)(kong)調(diao)效果。此外(wai)，在(zai)使(shi)(shi)(shi)用(yong)空(kong)(kong)(kong)(kong)(kong)調(diao)除(chu)霜除(chu)霧時(shi)(shi)(shi)，要(yao)使(shi)(shi)(shi)用(yong)外(wai)循(xun)環(huan)(huan)(huan)才有效。