大連車載空調由壓(ya)(ya)縮(suo)機(ji)(ji)(ji)、冷(leng)(leng)(leng)(leng)(leng)凝(ning)(ning)(ning)器、節(jie)流(liu)元件、蒸(zheng)發(fa)(fa)器、風機(ji)(ji)(ji)及必要(yao)的(de)(de)(de)(de)控制(zhi)(zhi)部件構成(cheng)，用(yong)于調(diao)(diao)節(jie)車(che)(che)(che)內(nei)(nei)(nei)溫(wen)度、濕度，給乘員提(ti)(ti)(ti)供(gong)舒適(shi)環境的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)系統。當壓(ya)(ya)縮(suo)機(ji)(ji)(ji)工作時(shi)，壓(ya)(ya)縮(suo)機(ji)(ji)(ji)吸入從(cong)蒸(zheng)發(fa)(fa)器出來的(de)(de)(de)(de)低溫(wen)低壓(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)劑，經(jing)壓(ya)(ya)縮(suo)，制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)劑的(de)(de)(de)(de)溫(wen)度和(he)壓(ya)(ya)力升高(gao)，并被送入冷(leng)(leng)(leng)(leng)(leng)凝(ning)(ning)(ning)器。在冷(leng)(leng)(leng)(leng)(leng)凝(ning)(ning)(ning)器內(nei)(nei)(nei)，高(gao)溫(wen)高(gao)壓(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)劑把熱(re)(re)量傳遞給經(jing)過(guo)冷(leng)(leng)(leng)(leng)(leng)凝(ning)(ning)(ning)器的(de)(de)(de)(de)車(che)(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)而液(ye)化，變(bian)成(cheng)液(ye)體(ti)。液(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)劑流(liu)經(jing)節(jie)流(liu)裝(zhuang)置時(shi)，溫(wen)度和(he)壓(ya)(ya)力降低，并進(jin)(jin)入蒸(zheng)發(fa)(fa)器。在蒸(zheng)發(fa)(fa)器內(nei)(nei)(nei)，低溫(wen)低壓(ya)(ya)的(de)(de)(de)(de)液(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)劑吸收(shou)經(jing)過(guo)蒸(zheng)發(fa)(fa)器的(de)(de)(de)(de)車(che)(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量而蒸(zheng)發(fa)(fa)，變(bian)成(cheng)氣(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)體(ti)又(you)被壓(ya)(ya)縮(suo)機(ji)(ji)(ji)吸入進(jin)(jin)行(xing)下一輪循環。這樣，通過(guo)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)劑在系統內(nei)(nei)(nei)的(de)(de)(de)(de)循環，不斷吸收(shou)車(che)(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量并排到車(che)(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)中(zhong)，使(shi)(shi)(shi)車(che)(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)溫(wen)度逐漸(jian)下降。內(nei)(nei)(nei)循環可(ke)(ke)以(yi)提(ti)(ti)(ti)高(gao)空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果，相(xiang)當于把室內(nei)(nei)(nei)冷(leng)(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)再制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果當然更好(hao)了。不過(guo)長時(shi)間使(shi)(shi)(shi)用(yong)內(nei)(nei)(nei)循環會使(shi)(shi)(shi)車(che)(che)(che)內(nei)(nei)(nei)的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量降低，可(ke)(ke)能讓(rang)人感覺頭昏腦漲。應當開(kai)一會兒(er)內(nei)(nei)(nei)循環就使(shi)(shi)(shi)用(yong)幾(ji)分鐘外(wai)循環，讓(rang)新鮮空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)進(jin)(jin)入車(che)(che)(che)內(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量。如果空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)(nei)外(wai)循環開(kai)關是機(ji)(ji)(ji)械式(shi)的(de)(de)(de)(de)撥(bo)桿(gan)而非按鈕，可(ke)(ke)以(yi)把撥(bo)桿(gan)放在內(nei)(nei)(nei)外(wai)循環的(de)(de)(de)(de)中(zhong)間，讓(rang)車(che)(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)適(shi)量進(jin)(jin)入，既能提(ti)(ti)(ti)升空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質(zhi)量，又(you)能提(ti)(ti)(ti)高(gao)空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果。此外(wai)，在使(shi)(shi)(shi)用(yong)空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)除(chu)霜除(chu)霧(wu)時(shi)，要(yao)使(shi)(shi)(shi)用(yong)外(wai)循環才有效。