大連車載空調由壓(ya)(ya)縮機(ji)、冷(leng)(leng)(leng)凝器(qi)(qi)、節(jie)(jie)流(liu)元件、蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)、風(feng)機(ji)及必要的(de)控(kong)制(zhi)(zhi)部(bu)件構成(cheng)，用(yong)(yong)于調節(jie)(jie)車內(nei)溫(wen)(wen)度(du)、濕(shi)度(du)，給乘員提(ti)供舒適(shi)環(huan)(huan)境的(de)空(kong)(kong)(kong)調系統。當(dang)壓(ya)(ya)縮機(ji)工(gong)作時，壓(ya)(ya)縮機(ji)吸入(ru)從蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)出來(lai)的(de)低(di)溫(wen)(wen)低(di)壓(ya)(ya)的(de)氣(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)，經壓(ya)(ya)縮，制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)的(de)溫(wen)(wen)度(du)和(he)壓(ya)(ya)力(li)升高(gao)，并(bing)(bing)被(bei)送入(ru)冷(leng)(leng)(leng)凝器(qi)(qi)。在(zai)冷(leng)(leng)(leng)凝器(qi)(qi)內(nei)，高(gao)溫(wen)(wen)高(gao)壓(ya)(ya)的(de)氣(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)把熱(re)(re)量(liang)(liang)傳遞給經過冷(leng)(leng)(leng)凝器(qi)(qi)的(de)車外(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)而(er)液(ye)(ye)化，變成(cheng)液(ye)(ye)體(ti)。液(ye)(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)流(liu)經節(jie)(jie)流(liu)裝置時，溫(wen)(wen)度(du)和(he)壓(ya)(ya)力(li)降低(di)，并(bing)(bing)進(jin)(jin)入(ru)蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)。在(zai)蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)內(nei)，低(di)溫(wen)(wen)低(di)壓(ya)(ya)的(de)液(ye)(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)吸收經過蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)的(de)車內(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)熱(re)(re)量(liang)(liang)而(er)蒸(zheng)(zheng)(zheng)發(fa)(fa)，變成(cheng)氣(qi)(qi)體(ti)。氣(qi)(qi)體(ti)又(you)被(bei)壓(ya)(ya)縮機(ji)吸入(ru)進(jin)(jin)行下一輪循(xun)(xun)環(huan)(huan)。這樣，通過制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)(ji)在(zai)系統內(nei)的(de)循(xun)(xun)環(huan)(huan)，不斷吸收車內(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)熱(re)(re)量(liang)(liang)并(bing)(bing)排到(dao)車外(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)中，使(shi)(shi)車內(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)溫(wen)(wen)度(du)逐漸(jian)下降。內(nei)循(xun)(xun)環(huan)(huan)可(ke)以提(ti)高(gao)空(kong)(kong)(kong)調效果，相當(dang)于把室內(nei)冷(leng)(leng)(leng)空(kong)(kong)(kong)氣(qi)(qi)再制(zhi)(zhi)冷(leng)(leng)(leng)，空(kong)(kong)(kong)調效果當(dang)然更好了。不過長時間(jian)使(shi)(shi)用(yong)(yong)內(nei)循(xun)(xun)環(huan)(huan)會使(shi)(shi)車內(nei)的(de)空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)降低(di)，可(ke)能(neng)讓(rang)人感覺頭昏腦漲。應當(dang)開一會兒內(nei)循(xun)(xun)環(huan)(huan)就使(shi)(shi)用(yong)(yong)幾(ji)分鐘(zhong)外(wai)(wai)循(xun)(xun)環(huan)(huan)，讓(rang)新鮮空(kong)(kong)(kong)氣(qi)(qi)進(jin)(jin)入(ru)車內(nei)，改(gai)善空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)。如(ru)果空(kong)(kong)(kong)調內(nei)外(wai)(wai)循(xun)(xun)環(huan)(huan)開關是機(ji)械式的(de)撥(bo)桿(gan)而(er)非按鈕，可(ke)以把撥(bo)桿(gan)放在(zai)內(nei)外(wai)(wai)循(xun)(xun)環(huan)(huan)的(de)中間(jian)，讓(rang)車外(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)適(shi)量(liang)(liang)進(jin)(jin)入(ru)，既能(neng)提(ti)升空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)，又(you)能(neng)提(ti)高(gao)空(kong)(kong)(kong)調效果。此(ci)外(wai)(wai)，在(zai)使(shi)(shi)用(yong)(yong)空(kong)(kong)(kong)調除霜除霧時，要使(shi)(shi)用(yong)(yong)外(wai)(wai)循(xun)(xun)環(huan)(huan)才有效。