大連車載空調由(you)壓縮機(ji)(ji)(ji)、冷(leng)凝器(qi)、節流(liu)元件、蒸發器(qi)、風機(ji)(ji)(ji)及必(bi)要的(de)(de)(de)(de)(de)(de)(de)控制部(bu)件構成(cheng)(cheng)，用(yong)(yong)于調節車(che)內(nei)(nei)(nei)溫(wen)(wen)度(du)、濕度(du)，給乘員提(ti)(ti)供舒(shu)適環(huan)(huan)(huan)境的(de)(de)(de)(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)調系統(tong)。當(dang)(dang)壓縮機(ji)(ji)(ji)工作時，壓縮機(ji)(ji)(ji)吸(xi)入(ru)從蒸發器(qi)出(chu)來(lai)的(de)(de)(de)(de)(de)(de)(de)低(di)溫(wen)(wen)低(di)壓的(de)(de)(de)(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制冷(leng)劑，經(jing)壓縮，制冷(leng)劑的(de)(de)(de)(de)(de)(de)(de)溫(wen)(wen)度(du)和壓力升高(gao)，并被送入(ru)冷(leng)凝器(qi)。在冷(leng)凝器(qi)內(nei)(nei)(nei)，高(gao)溫(wen)(wen)高(gao)壓的(de)(de)(de)(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)態(tai)制冷(leng)劑把(ba)熱(re)量(liang)(liang)(liang)(liang)傳(chuan)遞給經(jing)過(guo)(guo)冷(leng)凝器(qi)的(de)(de)(de)(de)(de)(de)(de)車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)而液化，變(bian)成(cheng)(cheng)液體(ti)。液態(tai)制冷(leng)劑流(liu)經(jing)節流(liu)裝置時，溫(wen)(wen)度(du)和壓力降(jiang)低(di)，并進(jin)(jin)入(ru)蒸發器(qi)。在蒸發器(qi)內(nei)(nei)(nei)，低(di)溫(wen)(wen)低(di)壓的(de)(de)(de)(de)(de)(de)(de)液態(tai)制冷(leng)劑吸(xi)收經(jing)過(guo)(guo)蒸發器(qi)的(de)(de)(de)(de)(de)(de)(de)車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)熱(re)量(liang)(liang)(liang)(liang)而蒸發，變(bian)成(cheng)(cheng)氣(qi)(qi)(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)(qi)(qi)體(ti)又被壓縮機(ji)(ji)(ji)吸(xi)入(ru)進(jin)(jin)行下一(yi)輪循(xun)(xun)(xun)環(huan)(huan)(huan)。這樣，通過(guo)(guo)制冷(leng)劑在系統(tong)內(nei)(nei)(nei)的(de)(de)(de)(de)(de)(de)(de)循(xun)(xun)(xun)環(huan)(huan)(huan)，不(bu)斷吸(xi)收車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)熱(re)量(liang)(liang)(liang)(liang)并排(pai)到車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)，使(shi)車(che)內(nei)(nei)(nei)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)溫(wen)(wen)度(du)逐漸(jian)下降(jiang)。內(nei)(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)可(ke)(ke)以(yi)提(ti)(ti)高(gao)空(kong)(kong)(kong)(kong)(kong)調效(xiao)果(guo)，相當(dang)(dang)于把(ba)室內(nei)(nei)(nei)冷(leng)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)再制冷(leng)，空(kong)(kong)(kong)(kong)(kong)調效(xiao)果(guo)當(dang)(dang)然(ran)更好了。不(bu)過(guo)(guo)長時間(jian)使(shi)用(yong)(yong)內(nei)(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)會使(shi)車(che)內(nei)(nei)(nei)的(de)(de)(de)(de)(de)(de)(de)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質量(liang)(liang)(liang)(liang)降(jiang)低(di)，可(ke)(ke)能(neng)(neng)讓人感覺(jue)頭(tou)昏腦漲。應當(dang)(dang)開一(yi)會兒內(nei)(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)就使(shi)用(yong)(yong)幾分鐘外(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)，讓新鮮空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)進(jin)(jin)入(ru)車(che)內(nei)(nei)(nei)，改善空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質量(liang)(liang)(liang)(liang)。如果(guo)空(kong)(kong)(kong)(kong)(kong)調內(nei)(nei)(nei)外(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)開關是機(ji)(ji)(ji)械(xie)式的(de)(de)(de)(de)(de)(de)(de)撥桿而非按鈕，可(ke)(ke)以(yi)把(ba)撥桿放(fang)在內(nei)(nei)(nei)外(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)的(de)(de)(de)(de)(de)(de)(de)中(zhong)間(jian)，讓車(che)外(wai)空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)適量(liang)(liang)(liang)(liang)進(jin)(jin)入(ru)，既能(neng)(neng)提(ti)(ti)升空(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)質量(liang)(liang)(liang)(liang)，又能(neng)(neng)提(ti)(ti)高(gao)空(kong)(kong)(kong)(kong)(kong)調效(xiao)果(guo)。此外(wai)，在使(shi)用(yong)(yong)空(kong)(kong)(kong)(kong)(kong)調除霜(shuang)除霧時，要使(shi)用(yong)(yong)外(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)才(cai)有效(xiao)。