大連車載空調由壓(ya)(ya)(ya)縮機、冷(leng)凝(ning)器(qi)(qi)、節流元件、蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)、風機及必(bi)要的(de)(de)控制(zhi)部件構(gou)成，用于(yu)調節車(che)內(nei)溫(wen)度(du)、濕度(du)，給乘(cheng)員(yuan)提(ti)供舒適(shi)環境的(de)(de)空(kong)(kong)(kong)調系統(tong)(tong)。當(dang)壓(ya)(ya)(ya)縮機工(gong)作時，壓(ya)(ya)(ya)縮機吸(xi)(xi)入(ru)從蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)出來的(de)(de)低(di)溫(wen)低(di)壓(ya)(ya)(ya)的(de)(de)氣(qi)(qi)態制(zhi)冷(leng)劑(ji)，經壓(ya)(ya)(ya)縮，制(zhi)冷(leng)劑(ji)的(de)(de)溫(wen)度(du)和壓(ya)(ya)(ya)力升(sheng)高(gao)，并被(bei)送(song)入(ru)冷(leng)凝(ning)器(qi)(qi)。在(zai)(zai)冷(leng)凝(ning)器(qi)(qi)內(nei)，高(gao)溫(wen)高(gao)壓(ya)(ya)(ya)的(de)(de)氣(qi)(qi)態制(zhi)冷(leng)劑(ji)把熱(re)量(liang)(liang)(liang)傳遞給經過(guo)冷(leng)凝(ning)器(qi)(qi)的(de)(de)車(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)而液化，變(bian)成液體。液態制(zhi)冷(leng)劑(ji)流經節流裝置(zhi)時，溫(wen)度(du)和壓(ya)(ya)(ya)力降(jiang)低(di)，并進入(ru)蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)。在(zai)(zai)蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)內(nei)，低(di)溫(wen)低(di)壓(ya)(ya)(ya)的(de)(de)液態制(zhi)冷(leng)劑(ji)吸(xi)(xi)收經過(guo)蒸(zheng)(zheng)發(fa)(fa)器(qi)(qi)的(de)(de)車(che)內(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)熱(re)量(liang)(liang)(liang)而蒸(zheng)(zheng)發(fa)(fa)，變(bian)成氣(qi)(qi)體。氣(qi)(qi)體又被(bei)壓(ya)(ya)(ya)縮機吸(xi)(xi)入(ru)進行下(xia)一(yi)輪循(xun)環。這樣，通過(guo)制(zhi)冷(leng)劑(ji)在(zai)(zai)系統(tong)(tong)內(nei)的(de)(de)循(xun)環，不斷吸(xi)(xi)收車(che)內(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)熱(re)量(liang)(liang)(liang)并排到車(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)中(zhong)(zhong)，使(shi)車(che)內(nei)空(kong)(kong)(kong)氣(qi)(qi)的(de)(de)溫(wen)度(du)逐漸下(xia)降(jiang)。內(nei)循(xun)環可(ke)以(yi)提(ti)高(gao)空(kong)(kong)(kong)調效(xiao)果(guo)，相(xiang)當(dang)于(yu)把室內(nei)冷(leng)空(kong)(kong)(kong)氣(qi)(qi)再制(zhi)冷(leng)，空(kong)(kong)(kong)調效(xiao)果(guo)當(dang)然更好(hao)了。不過(guo)長(chang)時間(jian)使(shi)用內(nei)循(xun)環會(hui)使(shi)車(che)內(nei)的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)(liang)降(jiang)低(di)，可(ke)能讓(rang)人感覺(jue)頭昏腦漲。應當(dang)開一(yi)會(hui)兒內(nei)循(xun)環就使(shi)用幾分鐘外(wai)循(xun)環，讓(rang)新(xin)鮮空(kong)(kong)(kong)氣(qi)(qi)進入(ru)車(che)內(nei)，改(gai)善空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)(liang)。如果(guo)空(kong)(kong)(kong)調內(nei)外(wai)循(xun)環開關是(shi)機械式的(de)(de)撥桿而非(fei)按(an)鈕(niu)，可(ke)以(yi)把撥桿放在(zai)(zai)內(nei)外(wai)循(xun)環的(de)(de)中(zhong)(zhong)間(jian)，讓(rang)車(che)外(wai)空(kong)(kong)(kong)氣(qi)(qi)適(shi)量(liang)(liang)(liang)進入(ru)，既能提(ti)升(sheng)空(kong)(kong)(kong)氣(qi)(qi)質量(liang)(liang)(liang)，又能提(ti)高(gao)空(kong)(kong)(kong)調效(xiao)果(guo)。此外(wai)，在(zai)(zai)使(shi)用空(kong)(kong)(kong)調除霜除霧時，要使(shi)用外(wai)循(xun)環才(cai)有效(xiao)。