大連車載空調由壓縮(suo)(suo)機、冷(leng)凝(ning)器(qi)(qi)、節流(liu)元件(jian)、蒸(zheng)發(fa)(fa)(fa)(fa)器(qi)(qi)、風機及(ji)必要的(de)(de)(de)控制部件(jian)構成，用于(yu)調(diao)節車(che)內(nei)溫(wen)度(du)(du)、濕度(du)(du)，給(gei)乘員(yuan)提(ti)供舒(shu)適(shi)環(huan)(huan)(huan)境的(de)(de)(de)空(kong)(kong)(kong)(kong)調(diao)系(xi)統。當壓縮(suo)(suo)機工作時(shi)(shi)(shi)(shi)，壓縮(suo)(suo)機吸入(ru)從蒸(zheng)發(fa)(fa)(fa)(fa)器(qi)(qi)出來的(de)(de)(de)低溫(wen)低壓的(de)(de)(de)氣(qi)(qi)態(tai)制冷(leng)劑，經(jing)壓縮(suo)(suo)，制冷(leng)劑的(de)(de)(de)溫(wen)度(du)(du)和壓力(li)(li)升高，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)，高溫(wen)高壓的(de)(de)(de)氣(qi)(qi)態(tai)制冷(leng)劑把(ba)熱量傳遞給(gei)經(jing)過(guo)冷(leng)凝(ning)器(qi)(qi)的(de)(de)(de)車(che)外(wai)空(kong)(kong)(kong)(kong)氣(qi)(qi)而(er)液(ye)(ye)化，變成液(ye)(ye)體。液(ye)(ye)態(tai)制冷(leng)劑流(liu)經(jing)節流(liu)裝置時(shi)(shi)(shi)(shi)，溫(wen)度(du)(du)和壓力(li)(li)降低，并進(jin)入(ru)蒸(zheng)發(fa)(fa)(fa)(fa)器(qi)(qi)。在(zai)(zai)蒸(zheng)發(fa)(fa)(fa)(fa)器(qi)(qi)內(nei)，低溫(wen)低壓的(de)(de)(de)液(ye)(ye)態(tai)制冷(leng)劑吸收(shou)經(jing)過(guo)蒸(zheng)發(fa)(fa)(fa)(fa)器(qi)(qi)的(de)(de)(de)車(che)內(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)熱量而(er)蒸(zheng)發(fa)(fa)(fa)(fa)，變成氣(qi)(qi)體。氣(qi)(qi)體又被(bei)壓縮(suo)(suo)機吸入(ru)進(jin)行下(xia)一輪循(xun)環(huan)(huan)(huan)。這樣，通過(guo)制冷(leng)劑在(zai)(zai)系(xi)統內(nei)的(de)(de)(de)循(xun)環(huan)(huan)(huan)，不斷吸收(shou)車(che)內(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)熱量并排到車(che)外(wai)空(kong)(kong)(kong)(kong)氣(qi)(qi)中(zhong)，使(shi)(shi)車(che)內(nei)空(kong)(kong)(kong)(kong)氣(qi)(qi)的(de)(de)(de)溫(wen)度(du)(du)逐(zhu)漸下(xia)降。內(nei)循(xun)環(huan)(huan)(huan)可以提(ti)高空(kong)(kong)(kong)(kong)調(diao)效(xiao)(xiao)果(guo)(guo)，相(xiang)當于(yu)把(ba)室(shi)內(nei)冷(leng)空(kong)(kong)(kong)(kong)氣(qi)(qi)再(zai)制冷(leng)，空(kong)(kong)(kong)(kong)調(diao)效(xiao)(xiao)果(guo)(guo)當然更好了。不過(guo)長(chang)時(shi)(shi)(shi)(shi)間使(shi)(shi)用內(nei)循(xun)環(huan)(huan)(huan)會使(shi)(shi)車(che)內(nei)的(de)(de)(de)空(kong)(kong)(kong)(kong)氣(qi)(qi)質量降低，可能(neng)(neng)讓(rang)人感(gan)覺(jue)頭昏腦漲。應當開一會兒內(nei)循(xun)環(huan)(huan)(huan)就使(shi)(shi)用幾分(fen)鐘外(wai)循(xun)環(huan)(huan)(huan)，讓(rang)新鮮(xian)空(kong)(kong)(kong)(kong)氣(qi)(qi)進(jin)入(ru)車(che)內(nei)，改善空(kong)(kong)(kong)(kong)氣(qi)(qi)質量。如果(guo)(guo)空(kong)(kong)(kong)(kong)調(diao)內(nei)外(wai)循(xun)環(huan)(huan)(huan)開關是(shi)機械(xie)式的(de)(de)(de)撥(bo)桿而(er)非按(an)鈕，可以把(ba)撥(bo)桿放在(zai)(zai)內(nei)外(wai)循(xun)環(huan)(huan)(huan)的(de)(de)(de)中(zhong)間，讓(rang)車(che)外(wai)空(kong)(kong)(kong)(kong)氣(qi)(qi)適(shi)量進(jin)入(ru)，既(ji)能(neng)(neng)提(ti)升空(kong)(kong)(kong)(kong)氣(qi)(qi)質量，又能(neng)(neng)提(ti)高空(kong)(kong)(kong)(kong)調(diao)效(xiao)(xiao)果(guo)(guo)。此外(wai)，在(zai)(zai)使(shi)(shi)用空(kong)(kong)(kong)(kong)調(diao)除(chu)霜除(chu)霧(wu)時(shi)(shi)(shi)(shi)，要使(shi)(shi)用外(wai)循(xun)環(huan)(huan)(huan)才有(you)效(xiao)(xiao)。