大連車載空調由(you)壓(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)、冷(leng)(leng)(leng)凝器、節流元件、蒸(zheng)(zheng)(zheng)(zheng)發(fa)(fa)(fa)器、風機(ji)及必要的(de)(de)(de)(de)控制(zhi)(zhi)部(bu)件構(gou)成，用(yong)于(yu)調(diao)(diao)節車(che)內(nei)(nei)(nei)(nei)溫(wen)度(du)、濕度(du)，給乘員提供(gong)舒適環(huan)(huan)境的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)系統。當壓(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)工作(zuo)時，壓(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)吸(xi)入從蒸(zheng)(zheng)(zheng)(zheng)發(fa)(fa)(fa)器出來的(de)(de)(de)(de)低溫(wen)低壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)，經壓(ya)(ya)(ya)(ya)(ya)縮(suo)，制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)的(de)(de)(de)(de)溫(wen)度(du)和壓(ya)(ya)(ya)(ya)(ya)力升高，并(bing)被送(song)入冷(leng)(leng)(leng)凝器。在(zai)(zai)(zai)冷(leng)(leng)(leng)凝器內(nei)(nei)(nei)(nei)，高溫(wen)高壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)把(ba)熱量(liang)傳遞給經過冷(leng)(leng)(leng)凝器的(de)(de)(de)(de)車(che)外空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)而(er)(er)液(ye)化，變成液(ye)體(ti)。液(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)流經節流裝置時，溫(wen)度(du)和壓(ya)(ya)(ya)(ya)(ya)力降(jiang)低，并(bing)進入蒸(zheng)(zheng)(zheng)(zheng)發(fa)(fa)(fa)器。在(zai)(zai)(zai)蒸(zheng)(zheng)(zheng)(zheng)發(fa)(fa)(fa)器內(nei)(nei)(nei)(nei)，低溫(wen)低壓(ya)(ya)(ya)(ya)(ya)的(de)(de)(de)(de)液(ye)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)吸(xi)收(shou)經過蒸(zheng)(zheng)(zheng)(zheng)發(fa)(fa)(fa)器的(de)(de)(de)(de)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)的(de)(de)(de)(de)熱量(liang)而(er)(er)蒸(zheng)(zheng)(zheng)(zheng)發(fa)(fa)(fa)，變成氣(qi)體(ti)。氣(qi)體(ti)又被壓(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)吸(xi)入進行下一輪循(xun)環(huan)(huan)。這樣，通過制(zhi)(zhi)冷(leng)(leng)(leng)劑(ji)(ji)在(zai)(zai)(zai)系統內(nei)(nei)(nei)(nei)的(de)(de)(de)(de)循(xun)環(huan)(huan)，不斷吸(xi)收(shou)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)的(de)(de)(de)(de)熱量(liang)并(bing)排到車(che)外空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)中，使(shi)(shi)車(che)內(nei)(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)的(de)(de)(de)(de)溫(wen)度(du)逐漸下降(jiang)。內(nei)(nei)(nei)(nei)循(xun)環(huan)(huan)可以(yi)提高空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果，相當于(yu)把(ba)室內(nei)(nei)(nei)(nei)冷(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)再制(zhi)(zhi)冷(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果當然更好了(le)。不過長(chang)時間使(shi)(shi)用(yong)內(nei)(nei)(nei)(nei)循(xun)環(huan)(huan)會(hui)使(shi)(shi)車(che)內(nei)(nei)(nei)(nei)的(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)質(zhi)(zhi)量(liang)降(jiang)低，可能(neng)讓人(ren)感(gan)覺頭(tou)昏腦漲(zhang)。應當開一會(hui)兒內(nei)(nei)(nei)(nei)循(xun)環(huan)(huan)就(jiu)使(shi)(shi)用(yong)幾分鐘外循(xun)環(huan)(huan)，讓新(xin)鮮空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)進入車(che)內(nei)(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)質(zhi)(zhi)量(liang)。如果空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)內(nei)(nei)(nei)(nei)外循(xun)環(huan)(huan)開關是(shi)機(ji)械(xie)式(shi)的(de)(de)(de)(de)撥桿(gan)而(er)(er)非按鈕，可以(yi)把(ba)撥桿(gan)放在(zai)(zai)(zai)內(nei)(nei)(nei)(nei)外循(xun)環(huan)(huan)的(de)(de)(de)(de)中間，讓車(che)外空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)適量(liang)進入，既能(neng)提升空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)質(zhi)(zhi)量(liang)，又能(neng)提高空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)效果。此外，在(zai)(zai)(zai)使(shi)(shi)用(yong)空(kong)(kong)(kong)(kong)(kong)(kong)調(diao)(diao)除(chu)(chu)霜除(chu)(chu)霧時，要使(shi)(shi)用(yong)外循(xun)環(huan)(huan)才有效。