大連車載空調由壓(ya)(ya)縮機(ji)(ji)、冷凝(ning)器(qi)、節流元件(jian)、蒸發(fa)器(qi)、風機(ji)(ji)及必要的(de)(de)控(kong)制部件(jian)構成(cheng)，用于調(diao)節車(che)內溫(wen)(wen)度(du)(du)、濕度(du)(du)，給乘員提供舒適環(huan)(huan)(huan)境的(de)(de)空(kong)(kong)(kong)調(diao)系統。當壓(ya)(ya)縮機(ji)(ji)工作時(shi)，壓(ya)(ya)縮機(ji)(ji)吸(xi)入(ru)(ru)從蒸發(fa)器(qi)出來(lai)的(de)(de)低溫(wen)(wen)低壓(ya)(ya)的(de)(de)氣(qi)(qi)(qi)態制冷劑(ji)(ji)，經壓(ya)(ya)縮，制冷劑(ji)(ji)的(de)(de)溫(wen)(wen)度(du)(du)和(he)(he)壓(ya)(ya)力(li)升高(gao)，并(bing)被送入(ru)(ru)冷凝(ning)器(qi)。在(zai)冷凝(ning)器(qi)內，高(gao)溫(wen)(wen)高(gao)壓(ya)(ya)的(de)(de)氣(qi)(qi)(qi)態制冷劑(ji)(ji)把(ba)熱(re)量傳(chuan)遞給經過冷凝(ning)器(qi)的(de)(de)車(che)外(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)(qi)而(er)液(ye)化，變成(cheng)液(ye)體。液(ye)態制冷劑(ji)(ji)流經節流裝置(zhi)時(shi)，溫(wen)(wen)度(du)(du)和(he)(he)壓(ya)(ya)力(li)降(jiang)低，并(bing)進(jin)入(ru)(ru)蒸發(fa)器(qi)。在(zai)蒸發(fa)器(qi)內，低溫(wen)(wen)低壓(ya)(ya)的(de)(de)液(ye)態制冷劑(ji)(ji)吸(xi)收經過蒸發(fa)器(qi)的(de)(de)車(che)內空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)熱(re)量而(er)蒸發(fa)，變成(cheng)氣(qi)(qi)(qi)體。氣(qi)(qi)(qi)體又被壓(ya)(ya)縮機(ji)(ji)吸(xi)入(ru)(ru)進(jin)行下(xia)一輪循(xun)環(huan)(huan)(huan)。這(zhe)樣，通(tong)過制冷劑(ji)(ji)在(zai)系統內的(de)(de)循(xun)環(huan)(huan)(huan)，不(bu)斷吸(xi)收車(che)內空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)熱(re)量并(bing)排到車(che)外(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)(qi)中，使(shi)(shi)(shi)(shi)車(che)內空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)溫(wen)(wen)度(du)(du)逐漸下(xia)降(jiang)。內循(xun)環(huan)(huan)(huan)可以提高(gao)空(kong)(kong)(kong)調(diao)效(xiao)(xiao)果，相當于把(ba)室(shi)內冷空(kong)(kong)(kong)氣(qi)(qi)(qi)再制冷，空(kong)(kong)(kong)調(diao)效(xiao)(xiao)果當然更好了。不(bu)過長時(shi)間(jian)使(shi)(shi)(shi)(shi)用內循(xun)環(huan)(huan)(huan)會使(shi)(shi)(shi)(shi)車(che)內的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)(qi)質量降(jiang)低，可能讓人感(gan)覺頭(tou)昏腦漲(zhang)。應(ying)當開一會兒內循(xun)環(huan)(huan)(huan)就使(shi)(shi)(shi)(shi)用幾(ji)分鐘外(wai)(wai)循(xun)環(huan)(huan)(huan)，讓新鮮空(kong)(kong)(kong)氣(qi)(qi)(qi)進(jin)入(ru)(ru)車(che)內，改善空(kong)(kong)(kong)氣(qi)(qi)(qi)質量。如果空(kong)(kong)(kong)調(diao)內外(wai)(wai)循(xun)環(huan)(huan)(huan)開關是機(ji)(ji)械(xie)式的(de)(de)撥(bo)桿而(er)非按鈕(niu)，可以把(ba)撥(bo)桿放在(zai)內外(wai)(wai)循(xun)環(huan)(huan)(huan)的(de)(de)中間(jian)，讓車(che)外(wai)(wai)空(kong)(kong)(kong)氣(qi)(qi)(qi)適量進(jin)入(ru)(ru)，既能提升空(kong)(kong)(kong)氣(qi)(qi)(qi)質量，又能提高(gao)空(kong)(kong)(kong)調(diao)效(xiao)(xiao)果。此(ci)外(wai)(wai)，在(zai)使(shi)(shi)(shi)(shi)用空(kong)(kong)(kong)調(diao)除霜除霧時(shi)，要使(shi)(shi)(shi)(shi)用外(wai)(wai)循(xun)環(huan)(huan)(huan)才有效(xiao)(xiao)。