大連車載空調由壓(ya)(ya)縮機(ji)、冷(leng)(leng)(leng)(leng)(leng)(leng)凝器、節(jie)(jie)流(liu)元件、蒸發(fa)器、風機(ji)及必要(yao)的(de)(de)控制(zhi)(zhi)(zhi)(zhi)部件構成(cheng)，用于(yu)調(diao)(diao)節(jie)(jie)車(che)內(nei)(nei)(nei)溫(wen)(wen)(wen)度(du)、濕度(du)，給乘員提(ti)(ti)供(gong)舒適環(huan)境的(de)(de)空(kong)(kong)(kong)(kong)調(diao)(diao)系統(tong)。當(dang)壓(ya)(ya)縮機(ji)工作時(shi)(shi)，壓(ya)(ya)縮機(ji)吸入(ru)從蒸發(fa)器出來(lai)的(de)(de)低(di)溫(wen)(wen)(wen)低(di)壓(ya)(ya)的(de)(de)氣(qi)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)，經壓(ya)(ya)縮，制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)的(de)(de)溫(wen)(wen)(wen)度(du)和(he)壓(ya)(ya)力(li)升高(gao)，并被(bei)送入(ru)冷(leng)(leng)(leng)(leng)(leng)(leng)凝器。在(zai)冷(leng)(leng)(leng)(leng)(leng)(leng)凝器內(nei)(nei)(nei)，高(gao)溫(wen)(wen)(wen)高(gao)壓(ya)(ya)的(de)(de)氣(qi)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)把(ba)熱(re)量(liang)(liang)傳遞給經過(guo)冷(leng)(leng)(leng)(leng)(leng)(leng)凝器的(de)(de)車(che)外(wai)(wai)空(kong)(kong)(kong)(kong)氣(qi)而液(ye)化，變成(cheng)液(ye)體。液(ye)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)流(liu)經節(jie)(jie)流(liu)裝置時(shi)(shi)，溫(wen)(wen)(wen)度(du)和(he)壓(ya)(ya)力(li)降低(di)，并進(jin)(jin)入(ru)蒸發(fa)器。在(zai)蒸發(fa)器內(nei)(nei)(nei)，低(di)溫(wen)(wen)(wen)低(di)壓(ya)(ya)的(de)(de)液(ye)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)吸收(shou)經過(guo)蒸發(fa)器的(de)(de)車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)的(de)(de)熱(re)量(liang)(liang)而蒸發(fa)，變成(cheng)氣(qi)體。氣(qi)體又被(bei)壓(ya)(ya)縮機(ji)吸入(ru)進(jin)(jin)行下(xia)一(yi)輪循(xun)(xun)環(huan)。這(zhe)樣，通過(guo)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)在(zai)系統(tong)內(nei)(nei)(nei)的(de)(de)循(xun)(xun)環(huan)，不(bu)斷吸收(shou)車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)的(de)(de)熱(re)量(liang)(liang)并排到(dao)車(che)外(wai)(wai)空(kong)(kong)(kong)(kong)氣(qi)中，使車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)氣(qi)的(de)(de)溫(wen)(wen)(wen)度(du)逐漸下(xia)降。內(nei)(nei)(nei)循(xun)(xun)環(huan)可(ke)以提(ti)(ti)高(gao)空(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)果，相當(dang)于(yu)把(ba)室(shi)內(nei)(nei)(nei)冷(leng)(leng)(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)氣(qi)再制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)果當(dang)然更好(hao)了。不(bu)過(guo)長時(shi)(shi)間使用內(nei)(nei)(nei)循(xun)(xun)環(huan)會使車(che)內(nei)(nei)(nei)的(de)(de)空(kong)(kong)(kong)(kong)氣(qi)質(zhi)量(liang)(liang)降低(di)，可(ke)能讓人感覺頭昏腦漲(zhang)。應當(dang)開(kai)一(yi)會兒(er)內(nei)(nei)(nei)循(xun)(xun)環(huan)就使用幾分(fen)鐘外(wai)(wai)循(xun)(xun)環(huan)，讓新鮮空(kong)(kong)(kong)(kong)氣(qi)進(jin)(jin)入(ru)車(che)內(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)氣(qi)質(zhi)量(liang)(liang)。如果空(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)(nei)外(wai)(wai)循(xun)(xun)環(huan)開(kai)關(guan)是(shi)機(ji)械式的(de)(de)撥(bo)桿(gan)(gan)而非按鈕，可(ke)以把(ba)撥(bo)桿(gan)(gan)放在(zai)內(nei)(nei)(nei)外(wai)(wai)循(xun)(xun)環(huan)的(de)(de)中間，讓車(che)外(wai)(wai)空(kong)(kong)(kong)(kong)氣(qi)適量(liang)(liang)進(jin)(jin)入(ru)，既(ji)能提(ti)(ti)升空(kong)(kong)(kong)(kong)氣(qi)質(zhi)量(liang)(liang)，又能提(ti)(ti)高(gao)空(kong)(kong)(kong)(kong)調(diao)(diao)效(xiao)果。此外(wai)(wai)，在(zai)使用空(kong)(kong)(kong)(kong)調(diao)(diao)除霜(shuang)除霧時(shi)(shi)，要(yao)使用外(wai)(wai)循(xun)(xun)環(huan)才有效(xiao)。