大連車載空調由壓(ya)(ya)縮(suo)(suo)機(ji)(ji)、冷(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)、節流(liu)元(yuan)件、蒸(zheng)發(fa)器(qi)(qi)(qi)、風機(ji)(ji)及必要的(de)(de)(de)控(kong)制(zhi)(zhi)部件構成(cheng)(cheng)，用(yong)于調(diao)(diao)(diao)節車(che)(che)內(nei)(nei)(nei)溫(wen)(wen)(wen)(wen)度(du)、濕度(du)，給乘員(yuan)提(ti)供舒(shu)適(shi)環(huan)(huan)(huan)(huan)境的(de)(de)(de)空(kong)(kong)(kong)(kong)調(diao)(diao)(diao)系(xi)統。當(dang)(dang)(dang)壓(ya)(ya)縮(suo)(suo)機(ji)(ji)工(gong)作時，壓(ya)(ya)縮(suo)(suo)機(ji)(ji)吸入(ru)從蒸(zheng)發(fa)器(qi)(qi)(qi)出(chu)來(lai)的(de)(de)(de)低(di)溫(wen)(wen)(wen)(wen)低(di)壓(ya)(ya)的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)劑，經(jing)壓(ya)(ya)縮(suo)(suo)，制(zhi)(zhi)冷(leng)(leng)劑的(de)(de)(de)溫(wen)(wen)(wen)(wen)度(du)和壓(ya)(ya)力升高，并(bing)被送入(ru)冷(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)。在(zai)冷(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)內(nei)(nei)(nei)，高溫(wen)(wen)(wen)(wen)高壓(ya)(ya)的(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)劑把熱(re)(re)量傳遞給經(jing)過(guo)冷(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)的(de)(de)(de)車(che)(che)外(wai)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)而(er)液化，變成(cheng)(cheng)液體。液態(tai)制(zhi)(zhi)冷(leng)(leng)劑流(liu)經(jing)節流(liu)裝置時，溫(wen)(wen)(wen)(wen)度(du)和壓(ya)(ya)力降低(di)，并(bing)進(jin)入(ru)蒸(zheng)發(fa)器(qi)(qi)(qi)。在(zai)蒸(zheng)發(fa)器(qi)(qi)(qi)內(nei)(nei)(nei)，低(di)溫(wen)(wen)(wen)(wen)低(di)壓(ya)(ya)的(de)(de)(de)液態(tai)制(zhi)(zhi)冷(leng)(leng)劑吸收(shou)(shou)經(jing)過(guo)蒸(zheng)發(fa)器(qi)(qi)(qi)的(de)(de)(de)車(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)熱(re)(re)量而(er)蒸(zheng)發(fa)，變成(cheng)(cheng)氣(qi)(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)(qi)體又被壓(ya)(ya)縮(suo)(suo)機(ji)(ji)吸入(ru)進(jin)行下(xia)一輪循(xun)環(huan)(huan)(huan)(huan)。這樣，通過(guo)制(zhi)(zhi)冷(leng)(leng)劑在(zai)系(xi)統內(nei)(nei)(nei)的(de)(de)(de)循(xun)環(huan)(huan)(huan)(huan)，不斷吸收(shou)(shou)車(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)熱(re)(re)量并(bing)排到車(che)(che)外(wai)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中，使車(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)溫(wen)(wen)(wen)(wen)度(du)逐漸下(xia)降。內(nei)(nei)(nei)循(xun)環(huan)(huan)(huan)(huan)可以(yi)提(ti)高空(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效果(guo)，相當(dang)(dang)(dang)于把室內(nei)(nei)(nei)冷(leng)(leng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)再(zai)制(zhi)(zhi)冷(leng)(leng)，空(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效果(guo)當(dang)(dang)(dang)然更好(hao)了。不過(guo)長時間使用(yong)內(nei)(nei)(nei)循(xun)環(huan)(huan)(huan)(huan)會使車(che)(che)內(nei)(nei)(nei)的(de)(de)(de)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量降低(di)，可能讓人感(gan)覺頭昏腦漲。應當(dang)(dang)(dang)開(kai)一會兒內(nei)(nei)(nei)循(xun)環(huan)(huan)(huan)(huan)就使用(yong)幾(ji)分鐘(zhong)外(wai)循(xun)環(huan)(huan)(huan)(huan)，讓新鮮空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)進(jin)入(ru)車(che)(che)內(nei)(nei)(nei)，改善(shan)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量。如果(guo)空(kong)(kong)(kong)(kong)調(diao)(diao)(diao)內(nei)(nei)(nei)外(wai)循(xun)環(huan)(huan)(huan)(huan)開(kai)關是(shi)機(ji)(ji)械式的(de)(de)(de)撥(bo)桿而(er)非按鈕(niu)，可以(yi)把撥(bo)桿放在(zai)內(nei)(nei)(nei)外(wai)循(xun)環(huan)(huan)(huan)(huan)的(de)(de)(de)中間，讓車(che)(che)外(wai)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)適(shi)量進(jin)入(ru)，既能提(ti)升空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量，又能提(ti)高空(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效果(guo)。此外(wai)，在(zai)使用(yong)空(kong)(kong)(kong)(kong)調(diao)(diao)(diao)除霜除霧時，要使用(yong)外(wai)循(xun)環(huan)(huan)(huan)(huan)才有效。