大連車載空調由壓(ya)(ya)(ya)縮機(ji)、冷(leng)(leng)(leng)(leng)凝(ning)器(qi)(qi)、節流(liu)(liu)元件、蒸發器(qi)(qi)、風機(ji)及必要的(de)(de)(de)(de)(de)控制(zhi)(zhi)部件構成(cheng)，用(yong)于調節車(che)(che)內(nei)(nei)溫(wen)(wen)度(du)、濕度(du)，給(gei)乘員提(ti)(ti)供(gong)舒(shu)適(shi)環(huan)(huan)(huan)境(jing)的(de)(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)調系(xi)統。當壓(ya)(ya)(ya)縮機(ji)工作時，壓(ya)(ya)(ya)縮機(ji)吸(xi)入(ru)從蒸發器(qi)(qi)出(chu)來的(de)(de)(de)(de)(de)低(di)溫(wen)(wen)低(di)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)，經壓(ya)(ya)(ya)縮，制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)的(de)(de)(de)(de)(de)溫(wen)(wen)度(du)和(he)壓(ya)(ya)(ya)力(li)升高，并(bing)被送入(ru)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)(qi)。在(zai)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)(qi)內(nei)(nei)，高溫(wen)(wen)高壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)把(ba)熱量(liang)傳遞給(gei)經過(guo)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)(qi)的(de)(de)(de)(de)(de)車(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)而(er)液化，變成(cheng)液體。液態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)流(liu)(liu)經節流(liu)(liu)裝置時，溫(wen)(wen)度(du)和(he)壓(ya)(ya)(ya)力(li)降(jiang)低(di)，并(bing)進(jin)入(ru)蒸發器(qi)(qi)。在(zai)蒸發器(qi)(qi)內(nei)(nei)，低(di)溫(wen)(wen)低(di)壓(ya)(ya)(ya)的(de)(de)(de)(de)(de)液態(tai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)吸(xi)收(shou)經過(guo)蒸發器(qi)(qi)的(de)(de)(de)(de)(de)車(che)(che)內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)熱量(liang)而(er)蒸發，變成(cheng)氣(qi)(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)(qi)體又(you)被壓(ya)(ya)(ya)縮機(ji)吸(xi)入(ru)進(jin)行下一(yi)輪循(xun)(xun)環(huan)(huan)(huan)。這樣，通過(guo)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)(ji)在(zai)系(xi)統內(nei)(nei)的(de)(de)(de)(de)(de)循(xun)(xun)環(huan)(huan)(huan)，不斷吸(xi)收(shou)車(che)(che)內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)熱量(liang)并(bing)排到車(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)，使(shi)車(che)(che)內(nei)(nei)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)溫(wen)(wen)度(du)逐漸下降(jiang)。內(nei)(nei)循(xun)(xun)環(huan)(huan)(huan)可以提(ti)(ti)高空(kong)(kong)(kong)(kong)(kong)(kong)調效(xiao)(xiao)果(guo)，相當于把(ba)室內(nei)(nei)冷(leng)(leng)(leng)(leng)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)再制(zhi)(zhi)冷(leng)(leng)(leng)(leng)，空(kong)(kong)(kong)(kong)(kong)(kong)調效(xiao)(xiao)果(guo)當然(ran)更好了(le)。不過(guo)長時間(jian)使(shi)用(yong)內(nei)(nei)循(xun)(xun)環(huan)(huan)(huan)會(hui)使(shi)車(che)(che)內(nei)(nei)的(de)(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質量(liang)降(jiang)低(di)，可能讓人感覺頭昏腦漲。應(ying)當開(kai)一(yi)會(hui)兒內(nei)(nei)循(xun)(xun)環(huan)(huan)(huan)就使(shi)用(yong)幾分鐘外(wai)循(xun)(xun)環(huan)(huan)(huan)，讓新鮮空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)進(jin)入(ru)車(che)(che)內(nei)(nei)，改善(shan)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質量(liang)。如(ru)果(guo)空(kong)(kong)(kong)(kong)(kong)(kong)調內(nei)(nei)外(wai)循(xun)(xun)環(huan)(huan)(huan)開(kai)關是機(ji)械式(shi)的(de)(de)(de)(de)(de)撥(bo)桿(gan)而(er)非按鈕，可以把(ba)撥(bo)桿(gan)放在(zai)內(nei)(nei)外(wai)循(xun)(xun)環(huan)(huan)(huan)的(de)(de)(de)(de)(de)中(zhong)間(jian)，讓車(che)(che)外(wai)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)適(shi)量(liang)進(jin)入(ru)，既能提(ti)(ti)升空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質量(liang)，又(you)能提(ti)(ti)高空(kong)(kong)(kong)(kong)(kong)(kong)調效(xiao)(xiao)果(guo)。此外(wai)，在(zai)使(shi)用(yong)空(kong)(kong)(kong)(kong)(kong)(kong)調除(chu)霜除(chu)霧時，要使(shi)用(yong)外(wai)循(xun)(xun)環(huan)(huan)(huan)才有效(xiao)(xiao)。