大連車載空調由壓(ya)縮(suo)機、冷(leng)凝(ning)器(qi)(qi)(qi)(qi)、節(jie)流(liu)元件、蒸(zheng)發(fa)(fa)(fa)器(qi)(qi)(qi)(qi)、風機及必要(yao)(yao)的(de)(de)(de)控制(zhi)部件構成(cheng)，用(yong)于調(diao)(diao)節(jie)車(che)(che)(che)內(nei)(nei)溫(wen)度(du)、濕度(du)，給乘員提(ti)(ti)(ti)供(gong)舒適環(huan)境的(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)系(xi)統。當(dang)壓(ya)縮(suo)機工作(zuo)時，壓(ya)縮(suo)機吸(xi)(xi)入(ru)(ru)(ru)從蒸(zheng)發(fa)(fa)(fa)器(qi)(qi)(qi)(qi)出來的(de)(de)(de)低(di)溫(wen)低(di)壓(ya)的(de)(de)(de)氣(qi)(qi)(qi)態(tai)制(zhi)冷(leng)劑，經(jing)(jing)壓(ya)縮(suo)，制(zhi)冷(leng)劑的(de)(de)(de)溫(wen)度(du)和壓(ya)力(li)(li)升(sheng)(sheng)高(gao)(gao)，并(bing)被送(song)入(ru)(ru)(ru)冷(leng)凝(ning)器(qi)(qi)(qi)(qi)。在冷(leng)凝(ning)器(qi)(qi)(qi)(qi)內(nei)(nei)，高(gao)(gao)溫(wen)高(gao)(gao)壓(ya)的(de)(de)(de)氣(qi)(qi)(qi)態(tai)制(zhi)冷(leng)劑把熱量(liang)(liang)傳遞給經(jing)(jing)過冷(leng)凝(ning)器(qi)(qi)(qi)(qi)的(de)(de)(de)車(che)(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)而液(ye)(ye)化(hua)，變成(cheng)液(ye)(ye)體(ti)(ti)。液(ye)(ye)態(tai)制(zhi)冷(leng)劑流(liu)經(jing)(jing)節(jie)流(liu)裝置時，溫(wen)度(du)和壓(ya)力(li)(li)降(jiang)低(di)，并(bing)進入(ru)(ru)(ru)蒸(zheng)發(fa)(fa)(fa)器(qi)(qi)(qi)(qi)。在蒸(zheng)發(fa)(fa)(fa)器(qi)(qi)(qi)(qi)內(nei)(nei)，低(di)溫(wen)低(di)壓(ya)的(de)(de)(de)液(ye)(ye)態(tai)制(zhi)冷(leng)劑吸(xi)(xi)收經(jing)(jing)過蒸(zheng)發(fa)(fa)(fa)器(qi)(qi)(qi)(qi)的(de)(de)(de)車(che)(che)(che)內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)熱量(liang)(liang)而蒸(zheng)發(fa)(fa)(fa)，變成(cheng)氣(qi)(qi)(qi)體(ti)(ti)。氣(qi)(qi)(qi)體(ti)(ti)又(you)被壓(ya)縮(suo)機吸(xi)(xi)入(ru)(ru)(ru)進行(xing)下一(yi)輪(lun)循環(huan)。這樣，通過制(zhi)冷(leng)劑在系(xi)統內(nei)(nei)的(de)(de)(de)循環(huan)，不斷(duan)吸(xi)(xi)收車(che)(che)(che)內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)熱量(liang)(liang)并(bing)排到車(che)(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)中，使車(che)(che)(che)內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)溫(wen)度(du)逐漸(jian)下降(jiang)。內(nei)(nei)循環(huan)可以提(ti)(ti)(ti)高(gao)(gao)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)果(guo)，相當(dang)于把室內(nei)(nei)冷(leng)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)再制(zhi)冷(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)果(guo)當(dang)然更好了。不過長時間使用(yong)內(nei)(nei)循環(huan)會(hui)使車(che)(che)(che)內(nei)(nei)的(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質量(liang)(liang)降(jiang)低(di)，可能讓人感覺頭昏腦漲(zhang)。應當(dang)開一(yi)會(hui)兒內(nei)(nei)循環(huan)就(jiu)使用(yong)幾(ji)分鐘外(wai)循環(huan)，讓新鮮空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)進入(ru)(ru)(ru)車(che)(che)(che)內(nei)(nei)，改善(shan)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質量(liang)(liang)。如果(guo)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)外(wai)循環(huan)開關是機械(xie)式(shi)的(de)(de)(de)撥桿而非按鈕(niu)，可以把撥桿放在內(nei)(nei)外(wai)循環(huan)的(de)(de)(de)中間，讓車(che)(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)適量(liang)(liang)進入(ru)(ru)(ru)，既(ji)能提(ti)(ti)(ti)升(sheng)(sheng)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質量(liang)(liang)，又(you)能提(ti)(ti)(ti)高(gao)(gao)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)果(guo)。此外(wai)，在使用(yong)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)除(chu)霜除(chu)霧時，要(yao)(yao)使用(yong)外(wai)循環(huan)才有效(xiao)。