大連車載空調由壓(ya)(ya)縮(suo)機(ji)、冷(leng)(leng)(leng)凝(ning)器(qi)(qi)(qi)(qi)、節流元(yuan)件、蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)、風機(ji)及必要的(de)(de)控制(zhi)部件構(gou)成，用(yong)于調節車(che)內(nei)溫(wen)度(du)、濕度(du)，給乘員(yuan)提(ti)供舒適環境(jing)的(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調系(xi)統。當(dang)(dang)壓(ya)(ya)縮(suo)機(ji)工作時(shi)，壓(ya)(ya)縮(suo)機(ji)吸(xi)(xi)入(ru)從蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)出來的(de)(de)低(di)(di)(di)溫(wen)低(di)(di)(di)壓(ya)(ya)的(de)(de)氣(qi)(qi)(qi)(qi)態(tai)(tai)制(zhi)冷(leng)(leng)(leng)劑(ji)，經壓(ya)(ya)縮(suo)，制(zhi)冷(leng)(leng)(leng)劑(ji)的(de)(de)溫(wen)度(du)和壓(ya)(ya)力升高(gao)(gao)(gao)，并(bing)被送入(ru)冷(leng)(leng)(leng)凝(ning)器(qi)(qi)(qi)(qi)。在(zai)(zai)(zai)冷(leng)(leng)(leng)凝(ning)器(qi)(qi)(qi)(qi)內(nei)，高(gao)(gao)(gao)溫(wen)高(gao)(gao)(gao)壓(ya)(ya)的(de)(de)氣(qi)(qi)(qi)(qi)態(tai)(tai)制(zhi)冷(leng)(leng)(leng)劑(ji)把熱量(liang)(liang)(liang)傳遞給經過(guo)冷(leng)(leng)(leng)凝(ning)器(qi)(qi)(qi)(qi)的(de)(de)車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)而液(ye)化(hua)，變(bian)成液(ye)體。液(ye)態(tai)(tai)制(zhi)冷(leng)(leng)(leng)劑(ji)流經節流裝置(zhi)時(shi)，溫(wen)度(du)和壓(ya)(ya)力降(jiang)低(di)(di)(di)，并(bing)進入(ru)蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)。在(zai)(zai)(zai)蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)內(nei)，低(di)(di)(di)溫(wen)低(di)(di)(di)壓(ya)(ya)的(de)(de)液(ye)態(tai)(tai)制(zhi)冷(leng)(leng)(leng)劑(ji)吸(xi)(xi)收(shou)經過(guo)蒸(zheng)發(fa)器(qi)(qi)(qi)(qi)的(de)(de)車(che)內(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)熱量(liang)(liang)(liang)而蒸(zheng)發(fa)，變(bian)成氣(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)體又被壓(ya)(ya)縮(suo)機(ji)吸(xi)(xi)入(ru)進行下一輪(lun)循(xun)(xun)(xun)環。這樣，通過(guo)制(zhi)冷(leng)(leng)(leng)劑(ji)在(zai)(zai)(zai)系(xi)統內(nei)的(de)(de)循(xun)(xun)(xun)環，不斷(duan)吸(xi)(xi)收(shou)車(che)內(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)熱量(liang)(liang)(liang)并(bing)排到車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)中，使(shi)(shi)車(che)內(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)溫(wen)度(du)逐漸下降(jiang)。內(nei)循(xun)(xun)(xun)環可以提(ti)高(gao)(gao)(gao)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調效果，相當(dang)(dang)于把室內(nei)冷(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)再制(zhi)冷(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調效果當(dang)(dang)然更(geng)好了。不過(guo)長時(shi)間使(shi)(shi)用(yong)內(nei)循(xun)(xun)(xun)環會(hui)使(shi)(shi)車(che)內(nei)的(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)質量(liang)(liang)(liang)降(jiang)低(di)(di)(di)，可能(neng)讓人感覺(jue)頭昏腦漲(zhang)。應當(dang)(dang)開一會(hui)兒內(nei)循(xun)(xun)(xun)環就使(shi)(shi)用(yong)幾分鐘外(wai)循(xun)(xun)(xun)環，讓新(xin)鮮空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)進入(ru)車(che)內(nei)，改(gai)善空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)質量(liang)(liang)(liang)。如果空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調內(nei)外(wai)循(xun)(xun)(xun)環開關是機(ji)械式的(de)(de)撥桿而非按鈕，可以把撥桿放在(zai)(zai)(zai)內(nei)外(wai)循(xun)(xun)(xun)環的(de)(de)中間，讓車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)適量(liang)(liang)(liang)進入(ru)，既能(neng)提(ti)升空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)質量(liang)(liang)(liang)，又能(neng)提(ti)高(gao)(gao)(gao)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調效果。此外(wai)，在(zai)(zai)(zai)使(shi)(shi)用(yong)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調除霜除霧時(shi)，要使(shi)(shi)用(yong)外(wai)循(xun)(xun)(xun)環才有效。