大連車載空調由壓(ya)(ya)(ya)縮(suo)(suo)機(ji)、冷(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)、節流元件(jian)(jian)、蒸(zheng)(zheng)(zheng)發(fa)器(qi)(qi)、風機(ji)及必要的(de)(de)(de)(de)控制(zhi)部件(jian)(jian)構成(cheng)(cheng)，用(yong)于調(diao)節車(che)內(nei)(nei)(nei)(nei)溫(wen)度(du)、濕度(du)，給乘員提供舒適環(huan)(huan)境的(de)(de)(de)(de)空(kong)(kong)(kong)調(diao)系統(tong)。當壓(ya)(ya)(ya)縮(suo)(suo)機(ji)工作時(shi)，壓(ya)(ya)(ya)縮(suo)(suo)機(ji)吸入從蒸(zheng)(zheng)(zheng)發(fa)器(qi)(qi)出來的(de)(de)(de)(de)低(di)(di)溫(wen)低(di)(di)壓(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)態制(zhi)冷(leng)(leng)(leng)劑(ji)(ji)，經壓(ya)(ya)(ya)縮(suo)(suo)，制(zhi)冷(leng)(leng)(leng)劑(ji)(ji)的(de)(de)(de)(de)溫(wen)度(du)和壓(ya)(ya)(ya)力(li)升高(gao)，并(bing)被(bei)送(song)入冷(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)。在冷(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)內(nei)(nei)(nei)(nei)，高(gao)溫(wen)高(gao)壓(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)態制(zhi)冷(leng)(leng)(leng)劑(ji)(ji)把(ba)(ba)熱(re)(re)量(liang)(liang)傳遞給經過冷(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)的(de)(de)(de)(de)車(che)外(wai)(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)而(er)液(ye)(ye)化，變成(cheng)(cheng)液(ye)(ye)體(ti)。液(ye)(ye)態制(zhi)冷(leng)(leng)(leng)劑(ji)(ji)流經節流裝置時(shi)，溫(wen)度(du)和壓(ya)(ya)(ya)力(li)降低(di)(di)，并(bing)進(jin)入蒸(zheng)(zheng)(zheng)發(fa)器(qi)(qi)。在蒸(zheng)(zheng)(zheng)發(fa)器(qi)(qi)內(nei)(nei)(nei)(nei)，低(di)(di)溫(wen)低(di)(di)壓(ya)(ya)(ya)的(de)(de)(de)(de)液(ye)(ye)態制(zhi)冷(leng)(leng)(leng)劑(ji)(ji)吸收經過蒸(zheng)(zheng)(zheng)發(fa)器(qi)(qi)的(de)(de)(de)(de)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量(liang)(liang)而(er)蒸(zheng)(zheng)(zheng)發(fa)，變成(cheng)(cheng)氣(qi)(qi)體(ti)。氣(qi)(qi)體(ti)又被(bei)壓(ya)(ya)(ya)縮(suo)(suo)機(ji)吸入進(jin)行下一輪循(xun)(xun)環(huan)(huan)。這樣，通過制(zhi)冷(leng)(leng)(leng)劑(ji)(ji)在系統(tong)內(nei)(nei)(nei)(nei)的(de)(de)(de)(de)循(xun)(xun)環(huan)(huan)，不斷吸收車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量(liang)(liang)并(bing)排到車(che)外(wai)(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)中，使(shi)(shi)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)(de)溫(wen)度(du)逐(zhu)漸下降。內(nei)(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)可以(yi)提高(gao)空(kong)(kong)(kong)調(diao)效果，相當于把(ba)(ba)室內(nei)(nei)(nei)(nei)冷(leng)(leng)(leng)空(kong)(kong)(kong)氣(qi)(qi)再(zai)制(zhi)冷(leng)(leng)(leng)，空(kong)(kong)(kong)調(diao)效果當然更(geng)好(hao)了(le)。不過長時(shi)間使(shi)(shi)用(yong)內(nei)(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)會(hui)使(shi)(shi)車(che)內(nei)(nei)(nei)(nei)的(de)(de)(de)(de)空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)降低(di)(di)，可能讓(rang)人(ren)感覺頭(tou)昏腦漲。應當開(kai)一會(hui)兒內(nei)(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)就使(shi)(shi)用(yong)幾分鐘外(wai)(wai)(wai)循(xun)(xun)環(huan)(huan)，讓(rang)新鮮(xian)空(kong)(kong)(kong)氣(qi)(qi)進(jin)入車(che)內(nei)(nei)(nei)(nei)，改善空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)。如果空(kong)(kong)(kong)調(diao)內(nei)(nei)(nei)(nei)外(wai)(wai)(wai)循(xun)(xun)環(huan)(huan)開(kai)關是機(ji)械式的(de)(de)(de)(de)撥(bo)桿(gan)而(er)非按鈕，可以(yi)把(ba)(ba)撥(bo)桿(gan)放在內(nei)(nei)(nei)(nei)外(wai)(wai)(wai)循(xun)(xun)環(huan)(huan)的(de)(de)(de)(de)中間，讓(rang)車(che)外(wai)(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)適量(liang)(liang)進(jin)入，既能提升空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)，又能提高(gao)空(kong)(kong)(kong)調(diao)效果。此外(wai)(wai)(wai)，在使(shi)(shi)用(yong)空(kong)(kong)(kong)調(diao)除霜除霧時(shi)，要使(shi)(shi)用(yong)外(wai)(wai)(wai)循(xun)(xun)環(huan)(huan)才有效。