大連車載空調由壓(ya)縮(suo)(suo)機、冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)、節(jie)流元件、蒸(zheng)(zheng)發(fa)器(qi)(qi)(qi)、風機及必(bi)要(yao)的(de)(de)控(kong)制(zhi)(zhi)(zhi)(zhi)部件構成，用(yong)(yong)于調(diao)(diao)(diao)節(jie)車內(nei)(nei)(nei)(nei)(nei)溫(wen)(wen)(wen)度(du)(du)(du)、濕度(du)(du)(du)，給(gei)乘員提供(gong)舒適(shi)環(huan)(huan)(huan)(huan)境的(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)系(xi)統。當(dang)(dang)壓(ya)縮(suo)(suo)機工(gong)作時，壓(ya)縮(suo)(suo)機吸(xi)入(ru)(ru)(ru)(ru)從蒸(zheng)(zheng)發(fa)器(qi)(qi)(qi)出來的(de)(de)低(di)(di)(di)溫(wen)(wen)(wen)低(di)(di)(di)壓(ya)的(de)(de)氣(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)，經壓(ya)縮(suo)(suo)，制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)的(de)(de)溫(wen)(wen)(wen)度(du)(du)(du)和壓(ya)力(li)升高(gao)，并被送入(ru)(ru)(ru)(ru)冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)。在(zai)(zai)冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)內(nei)(nei)(nei)(nei)(nei)，高(gao)溫(wen)(wen)(wen)高(gao)壓(ya)的(de)(de)氣(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)把(ba)(ba)熱(re)量(liang)傳遞給(gei)經過(guo)冷(leng)(leng)(leng)(leng)凝(ning)(ning)器(qi)(qi)(qi)的(de)(de)車外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)而(er)液(ye)化，變成液(ye)體(ti)。液(ye)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)流經節(jie)流裝置時，溫(wen)(wen)(wen)度(du)(du)(du)和壓(ya)力(li)降(jiang)低(di)(di)(di)，并進(jin)(jin)入(ru)(ru)(ru)(ru)蒸(zheng)(zheng)發(fa)器(qi)(qi)(qi)。在(zai)(zai)蒸(zheng)(zheng)發(fa)器(qi)(qi)(qi)內(nei)(nei)(nei)(nei)(nei)，低(di)(di)(di)溫(wen)(wen)(wen)低(di)(di)(di)壓(ya)的(de)(de)液(ye)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)吸(xi)收經過(guo)蒸(zheng)(zheng)發(fa)器(qi)(qi)(qi)的(de)(de)車內(nei)(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)熱(re)量(liang)而(er)蒸(zheng)(zheng)發(fa)，變成氣(qi)(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)(qi)體(ti)又被壓(ya)縮(suo)(suo)機吸(xi)入(ru)(ru)(ru)(ru)進(jin)(jin)行下一輪循(xun)環(huan)(huan)(huan)(huan)。這樣，通過(guo)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)在(zai)(zai)系(xi)統內(nei)(nei)(nei)(nei)(nei)的(de)(de)循(xun)環(huan)(huan)(huan)(huan)，不斷吸(xi)收車內(nei)(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)熱(re)量(liang)并排到車外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)中，使車內(nei)(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)溫(wen)(wen)(wen)度(du)(du)(du)逐漸下降(jiang)。內(nei)(nei)(nei)(nei)(nei)循(xun)環(huan)(huan)(huan)(huan)可以(yi)提高(gao)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效(xiao)果，相當(dang)(dang)于把(ba)(ba)室(shi)內(nei)(nei)(nei)(nei)(nei)冷(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)再制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效(xiao)果當(dang)(dang)然(ran)更(geng)好了。不過(guo)長(chang)時間使用(yong)(yong)內(nei)(nei)(nei)(nei)(nei)循(xun)環(huan)(huan)(huan)(huan)會使車內(nei)(nei)(nei)(nei)(nei)的(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)質量(liang)降(jiang)低(di)(di)(di)，可能讓人(ren)感覺頭昏腦漲。應(ying)當(dang)(dang)開一會兒內(nei)(nei)(nei)(nei)(nei)循(xun)環(huan)(huan)(huan)(huan)就使用(yong)(yong)幾分鐘外(wai)循(xun)環(huan)(huan)(huan)(huan)，讓新(xin)鮮空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)進(jin)(jin)入(ru)(ru)(ru)(ru)車內(nei)(nei)(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)質量(liang)。如(ru)果空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)內(nei)(nei)(nei)(nei)(nei)外(wai)循(xun)環(huan)(huan)(huan)(huan)開關是機械(xie)式的(de)(de)撥(bo)桿而(er)非按(an)鈕，可以(yi)把(ba)(ba)撥(bo)桿放在(zai)(zai)內(nei)(nei)(nei)(nei)(nei)外(wai)循(xun)環(huan)(huan)(huan)(huan)的(de)(de)中間，讓車外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)適(shi)量(liang)進(jin)(jin)入(ru)(ru)(ru)(ru)，既(ji)能提升空(kong)(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)質量(liang)，又能提高(gao)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)效(xiao)果。此外(wai)，在(zai)(zai)使用(yong)(yong)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)(diao)除霜除霧(wu)時，要(yao)使用(yong)(yong)外(wai)循(xun)環(huan)(huan)(huan)(huan)才有效(xiao)。