大連車載空調由壓(ya)(ya)縮(suo)機(ji)(ji)、冷(leng)(leng)凝(ning)器(qi)(qi)、節(jie)流元件(jian)(jian)、蒸(zheng)發器(qi)(qi)、風(feng)機(ji)(ji)及必要的(de)(de)控制(zhi)(zhi)部件(jian)(jian)構成，用于(yu)調(diao)節(jie)車(che)(che)內(nei)(nei)(nei)(nei)(nei)(nei)溫(wen)(wen)度、濕度，給乘員提(ti)供舒適(shi)環境的(de)(de)空(kong)(kong)(kong)調(diao)系統(tong)。當壓(ya)(ya)縮(suo)機(ji)(ji)工作時，壓(ya)(ya)縮(suo)機(ji)(ji)吸(xi)(xi)入(ru)從蒸(zheng)發器(qi)(qi)出來(lai)的(de)(de)低(di)溫(wen)(wen)低(di)壓(ya)(ya)的(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)劑(ji)，經(jing)壓(ya)(ya)縮(suo)，制(zhi)(zhi)冷(leng)(leng)劑(ji)的(de)(de)溫(wen)(wen)度和壓(ya)(ya)力(li)(li)升(sheng)(sheng)高(gao)，并被(bei)送入(ru)冷(leng)(leng)凝(ning)器(qi)(qi)。在(zai)冷(leng)(leng)凝(ning)器(qi)(qi)內(nei)(nei)(nei)(nei)(nei)(nei)，高(gao)溫(wen)(wen)高(gao)壓(ya)(ya)的(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)劑(ji)把熱量(liang)傳(chuan)遞給經(jing)過(guo)冷(leng)(leng)凝(ning)器(qi)(qi)的(de)(de)車(che)(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)而液(ye)化，變(bian)成液(ye)體。液(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)劑(ji)流經(jing)節(jie)流裝(zhuang)置時，溫(wen)(wen)度和壓(ya)(ya)力(li)(li)降(jiang)(jiang)(jiang)低(di)，并進(jin)入(ru)蒸(zheng)發器(qi)(qi)。在(zai)蒸(zheng)發器(qi)(qi)內(nei)(nei)(nei)(nei)(nei)(nei)，低(di)溫(wen)(wen)低(di)壓(ya)(ya)的(de)(de)液(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)劑(ji)吸(xi)(xi)收經(jing)過(guo)蒸(zheng)發器(qi)(qi)的(de)(de)車(che)(che)內(nei)(nei)(nei)(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)熱量(liang)而蒸(zheng)發，變(bian)成氣(qi)(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)(qi)體又被(bei)壓(ya)(ya)縮(suo)機(ji)(ji)吸(xi)(xi)入(ru)進(jin)行下一輪循環。這樣(yang)，通過(guo)制(zhi)(zhi)冷(leng)(leng)劑(ji)在(zai)系統(tong)內(nei)(nei)(nei)(nei)(nei)(nei)的(de)(de)循環，不(bu)斷吸(xi)(xi)收車(che)(che)內(nei)(nei)(nei)(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)熱量(liang)并排(pai)到(dao)車(che)(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中，使車(che)(che)內(nei)(nei)(nei)(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)溫(wen)(wen)度逐漸下降(jiang)(jiang)(jiang)。內(nei)(nei)(nei)(nei)(nei)(nei)循環可(ke)以(yi)提(ti)高(gao)空(kong)(kong)(kong)調(diao)效果，相當于(yu)把室內(nei)(nei)(nei)(nei)(nei)(nei)冷(leng)(leng)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)再制(zhi)(zhi)冷(leng)(leng)，空(kong)(kong)(kong)調(diao)效果當然更好了(le)。不(bu)過(guo)長時間使用內(nei)(nei)(nei)(nei)(nei)(nei)循環會使車(che)(che)內(nei)(nei)(nei)(nei)(nei)(nei)的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)降(jiang)(jiang)(jiang)低(di)，可(ke)能(neng)讓人(ren)感覺頭(tou)昏腦漲。應當開一會兒內(nei)(nei)(nei)(nei)(nei)(nei)循環就使用幾(ji)分鐘(zhong)外(wai)循環，讓新鮮空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)進(jin)入(ru)車(che)(che)內(nei)(nei)(nei)(nei)(nei)(nei)，改善(shan)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)。如(ru)果空(kong)(kong)(kong)調(diao)內(nei)(nei)(nei)(nei)(nei)(nei)外(wai)循環開關是(shi)機(ji)(ji)械式(shi)的(de)(de)撥桿(gan)而非按鈕，可(ke)以(yi)把撥桿(gan)放(fang)在(zai)內(nei)(nei)(nei)(nei)(nei)(nei)外(wai)循環的(de)(de)中間，讓車(che)(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)適(shi)量(liang)進(jin)入(ru)，既能(neng)提(ti)升(sheng)(sheng)空(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)，又能(neng)提(ti)高(gao)空(kong)(kong)(kong)調(diao)效果。此(ci)外(wai)，在(zai)使用空(kong)(kong)(kong)調(diao)除(chu)(chu)霜(shuang)除(chu)(chu)霧時，要使用外(wai)循環才有效。