大連車載空調由壓(ya)(ya)縮(suo)機(ji)(ji)、冷凝(ning)器(qi)、節流元(yuan)件、蒸(zheng)(zheng)(zheng)發器(qi)、風機(ji)(ji)及(ji)必要(yao)的(de)(de)(de)(de)控(kong)制部件構成(cheng)，用于調(diao)節車內(nei)(nei)(nei)溫(wen)(wen)度(du)(du)、濕(shi)度(du)(du)，給乘員提供舒(shu)適(shi)環(huan)(huan)境的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)調(diao)系統。當(dang)壓(ya)(ya)縮(suo)機(ji)(ji)工作時(shi)，壓(ya)(ya)縮(suo)機(ji)(ji)吸(xi)(xi)入(ru)(ru)從蒸(zheng)(zheng)(zheng)發器(qi)出來的(de)(de)(de)(de)低(di)(di)溫(wen)(wen)低(di)(di)壓(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)(qi)態(tai)制冷劑(ji)，經(jing)壓(ya)(ya)縮(suo)，制冷劑(ji)的(de)(de)(de)(de)溫(wen)(wen)度(du)(du)和壓(ya)(ya)力升(sheng)高(gao)(gao)，并被送入(ru)(ru)冷凝(ning)器(qi)。在冷凝(ning)器(qi)內(nei)(nei)(nei)，高(gao)(gao)溫(wen)(wen)高(gao)(gao)壓(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)(qi)態(tai)制冷劑(ji)把熱(re)(re)量(liang)(liang)傳遞給經(jing)過(guo)(guo)冷凝(ning)器(qi)的(de)(de)(de)(de)車外空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)而(er)液(ye)化(hua)，變成(cheng)液(ye)體(ti)。液(ye)態(tai)制冷劑(ji)流經(jing)節流裝置時(shi)，溫(wen)(wen)度(du)(du)和壓(ya)(ya)力降低(di)(di)，并進入(ru)(ru)蒸(zheng)(zheng)(zheng)發器(qi)。在蒸(zheng)(zheng)(zheng)發器(qi)內(nei)(nei)(nei)，低(di)(di)溫(wen)(wen)低(di)(di)壓(ya)(ya)的(de)(de)(de)(de)液(ye)態(tai)制冷劑(ji)吸(xi)(xi)收(shou)經(jing)過(guo)(guo)蒸(zheng)(zheng)(zheng)發器(qi)的(de)(de)(de)(de)車內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量(liang)(liang)而(er)蒸(zheng)(zheng)(zheng)發，變成(cheng)氣(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)體(ti)又被壓(ya)(ya)縮(suo)機(ji)(ji)吸(xi)(xi)入(ru)(ru)進行(xing)下一輪循(xun)(xun)環(huan)(huan)。這樣，通過(guo)(guo)制冷劑(ji)在系統內(nei)(nei)(nei)的(de)(de)(de)(de)循(xun)(xun)環(huan)(huan)，不斷吸(xi)(xi)收(shou)車內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量(liang)(liang)并排到(dao)車外空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)中，使(shi)車內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)溫(wen)(wen)度(du)(du)逐(zhu)漸下降。內(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)可以提高(gao)(gao)空(kong)(kong)(kong)(kong)(kong)調(diao)效果，相當(dang)于把室(shi)內(nei)(nei)(nei)冷空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)再制冷，空(kong)(kong)(kong)(kong)(kong)調(diao)效果當(dang)然更好了(le)。不過(guo)(guo)長(chang)時(shi)間(jian)使(shi)用內(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)會(hui)使(shi)車內(nei)(nei)(nei)的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質量(liang)(liang)降低(di)(di)，可能(neng)(neng)讓人感覺頭(tou)昏腦漲。應當(dang)開一會(hui)兒(er)內(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)就(jiu)使(shi)用幾分鐘(zhong)外循(xun)(xun)環(huan)(huan)，讓新(xin)鮮空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)進入(ru)(ru)車內(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質量(liang)(liang)。如果空(kong)(kong)(kong)(kong)(kong)調(diao)內(nei)(nei)(nei)外循(xun)(xun)環(huan)(huan)開關是機(ji)(ji)械(xie)式的(de)(de)(de)(de)撥桿而(er)非(fei)按鈕(niu)，可以把撥桿放在內(nei)(nei)(nei)外循(xun)(xun)環(huan)(huan)的(de)(de)(de)(de)中間(jian)，讓車外空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)適(shi)量(liang)(liang)進入(ru)(ru)，既能(neng)(neng)提升(sheng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)質量(liang)(liang)，又能(neng)(neng)提高(gao)(gao)空(kong)(kong)(kong)(kong)(kong)調(diao)效果。此外，在使(shi)用空(kong)(kong)(kong)(kong)(kong)調(diao)除霜除霧時(shi)，要(yao)使(shi)用外循(xun)(xun)環(huan)(huan)才(cai)有效。