大連車載空調由壓(ya)(ya)縮(suo)機(ji)(ji)、冷(leng)(leng)(leng)(leng)凝(ning)器、節流(liu)元(yuan)件(jian)(jian)、蒸(zheng)發(fa)(fa)器、風機(ji)(ji)及必(bi)要(yao)(yao)的(de)(de)控(kong)制(zhi)(zhi)(zhi)部件(jian)(jian)構成，用(yong)(yong)(yong)(yong)于調節車(che)(che)內(nei)(nei)(nei)溫(wen)度(du)、濕度(du)，給乘員提供舒適(shi)環(huan)(huan)境的(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)調系(xi)統。當(dang)壓(ya)(ya)縮(suo)機(ji)(ji)工作時，壓(ya)(ya)縮(suo)機(ji)(ji)吸入從蒸(zheng)發(fa)(fa)器出來的(de)(de)低溫(wen)低壓(ya)(ya)的(de)(de)氣(qi)態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)，經壓(ya)(ya)縮(suo)，制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)的(de)(de)溫(wen)度(du)和(he)壓(ya)(ya)力升高，并(bing)被送入冷(leng)(leng)(leng)(leng)凝(ning)器。在(zai)(zai)冷(leng)(leng)(leng)(leng)凝(ning)器內(nei)(nei)(nei)，高溫(wen)高壓(ya)(ya)的(de)(de)氣(qi)態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)把(ba)熱量(liang)(liang)傳遞給經過(guo)冷(leng)(leng)(leng)(leng)凝(ning)器的(de)(de)車(che)(che)外(wai)(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)而液化，變(bian)成液體。液態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)流(liu)經節流(liu)裝置時，溫(wen)度(du)和(he)壓(ya)(ya)力降(jiang)低，并(bing)進(jin)入蒸(zheng)發(fa)(fa)器。在(zai)(zai)蒸(zheng)發(fa)(fa)器內(nei)(nei)(nei)，低溫(wen)低壓(ya)(ya)的(de)(de)液態制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)吸收經過(guo)蒸(zheng)發(fa)(fa)器的(de)(de)車(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)的(de)(de)熱量(liang)(liang)而蒸(zheng)發(fa)(fa)，變(bian)成氣(qi)體。氣(qi)體又被壓(ya)(ya)縮(suo)機(ji)(ji)吸入進(jin)行下(xia)(xia)一輪循(xun)(xun)環(huan)(huan)。這(zhe)樣，通過(guo)制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)在(zai)(zai)系(xi)統內(nei)(nei)(nei)的(de)(de)循(xun)(xun)環(huan)(huan)，不斷吸收車(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)的(de)(de)熱量(liang)(liang)并(bing)排到車(che)(che)外(wai)(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)中，使(shi)(shi)(shi)車(che)(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)的(de)(de)溫(wen)度(du)逐漸下(xia)(xia)降(jiang)。內(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)可以提高空(kong)(kong)(kong)(kong)(kong)(kong)調效果(guo)，相當(dang)于把(ba)室(shi)內(nei)(nei)(nei)冷(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)再(zai)制(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)調效果(guo)當(dang)然更好了。不過(guo)長時間使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)內(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)會使(shi)(shi)(shi)車(che)(che)內(nei)(nei)(nei)的(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)質量(liang)(liang)降(jiang)低，可能讓人感覺頭(tou)昏腦漲。應當(dang)開一會兒內(nei)(nei)(nei)循(xun)(xun)環(huan)(huan)就使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)幾分鐘外(wai)(wai)循(xun)(xun)環(huan)(huan)，讓新鮮空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)進(jin)入車(che)(che)內(nei)(nei)(nei)，改(gai)善空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)質量(liang)(liang)。如果(guo)空(kong)(kong)(kong)(kong)(kong)(kong)調內(nei)(nei)(nei)外(wai)(wai)循(xun)(xun)環(huan)(huan)開關是機(ji)(ji)械式的(de)(de)撥(bo)桿(gan)而非按鈕，可以把(ba)撥(bo)桿(gan)放在(zai)(zai)內(nei)(nei)(nei)外(wai)(wai)循(xun)(xun)環(huan)(huan)的(de)(de)中間，讓車(che)(che)外(wai)(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)適(shi)量(liang)(liang)進(jin)入，既能提升空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)質量(liang)(liang)，又能提高空(kong)(kong)(kong)(kong)(kong)(kong)調效果(guo)。此外(wai)(wai)，在(zai)(zai)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)空(kong)(kong)(kong)(kong)(kong)(kong)調除霜除霧(wu)時，要(yao)(yao)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)外(wai)(wai)循(xun)(xun)環(huan)(huan)才有效。