大連車載空調由壓(ya)縮(suo)機(ji)(ji)、冷(leng)(leng)(leng)(leng)凝(ning)器(qi)、節(jie)流元件(jian)(jian)、蒸發(fa)器(qi)、風(feng)機(ji)(ji)及必要(yao)的(de)(de)(de)(de)(de)控制(zhi)(zhi)(zhi)部件(jian)(jian)構成(cheng)，用(yong)于(yu)調(diao)(diao)節(jie)車(che)(che)(che)內(nei)(nei)(nei)溫度(du)(du)、濕度(du)(du)，給乘員提(ti)供(gong)舒適(shi)環境的(de)(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)系統。當(dang)(dang)壓(ya)縮(suo)機(ji)(ji)工作(zuo)時，壓(ya)縮(suo)機(ji)(ji)吸(xi)(xi)入(ru)從蒸發(fa)器(qi)出來(lai)的(de)(de)(de)(de)(de)低(di)(di)溫低(di)(di)壓(ya)的(de)(de)(de)(de)(de)氣(qi)(qi)態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)，經壓(ya)縮(suo)，制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)的(de)(de)(de)(de)(de)溫度(du)(du)和壓(ya)力升(sheng)高(gao)(gao)，并(bing)被送入(ru)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)。在冷(leng)(leng)(leng)(leng)凝(ning)器(qi)內(nei)(nei)(nei)，高(gao)(gao)溫高(gao)(gao)壓(ya)的(de)(de)(de)(de)(de)氣(qi)(qi)態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)把(ba)熱(re)量傳(chuan)遞給經過冷(leng)(leng)(leng)(leng)凝(ning)器(qi)的(de)(de)(de)(de)(de)車(che)(che)(che)外(wai)(wai)(wai)(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)而(er)液化(hua)，變成(cheng)液體(ti)。液態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)流經節(jie)流裝置(zhi)時，溫度(du)(du)和壓(ya)力降低(di)(di)，并(bing)進(jin)入(ru)蒸發(fa)器(qi)。在蒸發(fa)器(qi)內(nei)(nei)(nei)，低(di)(di)溫低(di)(di)壓(ya)的(de)(de)(de)(de)(de)液態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)吸(xi)(xi)收(shou)經過蒸發(fa)器(qi)的(de)(de)(de)(de)(de)車(che)(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)(de)熱(re)量而(er)蒸發(fa)，變成(cheng)氣(qi)(qi)體(ti)。氣(qi)(qi)體(ti)又被壓(ya)縮(suo)機(ji)(ji)吸(xi)(xi)入(ru)進(jin)行下一輪(lun)循(xun)環。這(zhe)樣(yang)，通過制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)在系統內(nei)(nei)(nei)的(de)(de)(de)(de)(de)循(xun)環，不(bu)斷吸(xi)(xi)收(shou)車(che)(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)(de)熱(re)量并(bing)排(pai)到車(che)(che)(che)外(wai)(wai)(wai)(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)中，使(shi)(shi)車(che)(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)(de)溫度(du)(du)逐漸下降。內(nei)(nei)(nei)循(xun)環可以提(ti)高(gao)(gao)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果(guo)，相當(dang)(dang)于(yu)把(ba)室內(nei)(nei)(nei)冷(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)再制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果(guo)當(dang)(dang)然更好了。不(bu)過長時間(jian)使(shi)(shi)用(yong)內(nei)(nei)(nei)循(xun)環會使(shi)(shi)車(che)(che)(che)內(nei)(nei)(nei)的(de)(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質量降低(di)(di)，可能讓(rang)(rang)人感覺頭昏腦(nao)漲(zhang)。應(ying)當(dang)(dang)開(kai)一會兒內(nei)(nei)(nei)循(xun)環就使(shi)(shi)用(yong)幾(ji)分鐘外(wai)(wai)(wai)(wai)循(xun)環，讓(rang)(rang)新鮮空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)進(jin)入(ru)車(che)(che)(che)內(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質量。如果(guo)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)(nei)外(wai)(wai)(wai)(wai)循(xun)環開(kai)關是機(ji)(ji)械式的(de)(de)(de)(de)(de)撥桿而(er)非按鈕(niu)，可以把(ba)撥桿放在內(nei)(nei)(nei)外(wai)(wai)(wai)(wai)循(xun)環的(de)(de)(de)(de)(de)中間(jian)，讓(rang)(rang)車(che)(che)(che)外(wai)(wai)(wai)(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)適(shi)量進(jin)入(ru)，既能提(ti)升(sheng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)質量，又能提(ti)高(gao)(gao)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果(guo)。此(ci)外(wai)(wai)(wai)(wai)，在使(shi)(shi)用(yong)空(kong)(kong)(kong)(kong)(kong)調(diao)(diao)除(chu)霜除(chu)霧時，要(yao)使(shi)(shi)用(yong)外(wai)(wai)(wai)(wai)循(xun)環才有效。