大連車載空調由壓(ya)(ya)(ya)縮機(ji)、冷(leng)(leng)(leng)(leng)凝(ning)器(qi)、節流元件、蒸(zheng)(zheng)(zheng)發器(qi)、風機(ji)及必要的(de)(de)(de)(de)控制(zhi)(zhi)(zhi)(zhi)部件構成(cheng)，用(yong)(yong)于(yu)調(diao)(diao)節車(che)內(nei)(nei)溫(wen)度(du)(du)(du)、濕度(du)(du)(du)，給乘員(yuan)提供舒適環(huan)(huan)(huan)(huan)(huan)境(jing)的(de)(de)(de)(de)空(kong)(kong)調(diao)(diao)系統。當(dang)(dang)壓(ya)(ya)(ya)縮機(ji)工作時，壓(ya)(ya)(ya)縮機(ji)吸(xi)入(ru)(ru)從(cong)蒸(zheng)(zheng)(zheng)發器(qi)出來的(de)(de)(de)(de)低(di)溫(wen)低(di)壓(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)，經(jing)壓(ya)(ya)(ya)縮，制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)的(de)(de)(de)(de)溫(wen)度(du)(du)(du)和壓(ya)(ya)(ya)力(li)(li)升(sheng)高(gao)(gao)，并被送入(ru)(ru)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)。在(zai)(zai)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)內(nei)(nei)，高(gao)(gao)溫(wen)高(gao)(gao)壓(ya)(ya)(ya)的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)(qi)(qi)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)把熱(re)(re)量(liang)(liang)(liang)傳遞(di)給經(jing)過(guo)冷(leng)(leng)(leng)(leng)凝(ning)器(qi)的(de)(de)(de)(de)車(che)外(wai)(wai)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)而(er)液(ye)(ye)化，變成(cheng)液(ye)(ye)體(ti)。液(ye)(ye)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)流經(jing)節流裝置時，溫(wen)度(du)(du)(du)和壓(ya)(ya)(ya)力(li)(li)降低(di)，并進(jin)(jin)入(ru)(ru)蒸(zheng)(zheng)(zheng)發器(qi)。在(zai)(zai)蒸(zheng)(zheng)(zheng)發器(qi)內(nei)(nei)，低(di)溫(wen)低(di)壓(ya)(ya)(ya)的(de)(de)(de)(de)液(ye)(ye)態(tai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)吸(xi)收經(jing)過(guo)蒸(zheng)(zheng)(zheng)發器(qi)的(de)(de)(de)(de)車(che)內(nei)(nei)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量(liang)(liang)(liang)而(er)蒸(zheng)(zheng)(zheng)發，變成(cheng)氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)(qi)(qi)(qi)體(ti)又(you)被壓(ya)(ya)(ya)縮機(ji)吸(xi)入(ru)(ru)進(jin)(jin)行下(xia)一輪循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)。這樣，通(tong)過(guo)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)劑(ji)在(zai)(zai)系統內(nei)(nei)的(de)(de)(de)(de)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)，不(bu)斷吸(xi)收車(che)內(nei)(nei)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)熱(re)(re)量(liang)(liang)(liang)并排到車(che)外(wai)(wai)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)中(zhong)，使(shi)車(che)內(nei)(nei)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)溫(wen)度(du)(du)(du)逐(zhu)漸下(xia)降。內(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)可以(yi)提高(gao)(gao)空(kong)(kong)調(diao)(diao)效(xiao)果，相當(dang)(dang)于(yu)把室內(nei)(nei)冷(leng)(leng)(leng)(leng)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)再(zai)制(zhi)(zhi)(zhi)(zhi)冷(leng)(leng)(leng)(leng)，空(kong)(kong)調(diao)(diao)效(xiao)果當(dang)(dang)然更好了。不(bu)過(guo)長時間(jian)使(shi)用(yong)(yong)內(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)會(hui)使(shi)車(che)內(nei)(nei)的(de)(de)(de)(de)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)降低(di)，可能(neng)讓(rang)人感(gan)覺(jue)頭昏腦漲。應當(dang)(dang)開(kai)一會(hui)兒內(nei)(nei)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)就使(shi)用(yong)(yong)幾分鐘(zhong)外(wai)(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)，讓(rang)新鮮空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)進(jin)(jin)入(ru)(ru)車(che)內(nei)(nei)，改善空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)。如果空(kong)(kong)調(diao)(diao)內(nei)(nei)外(wai)(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)開(kai)關是機(ji)械(xie)式的(de)(de)(de)(de)撥桿而(er)非按(an)鈕(niu)，可以(yi)把撥桿放在(zai)(zai)內(nei)(nei)外(wai)(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)的(de)(de)(de)(de)中(zhong)間(jian)，讓(rang)車(che)外(wai)(wai)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)適量(liang)(liang)(liang)進(jin)(jin)入(ru)(ru)，既能(neng)提升(sheng)空(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)，又(you)能(neng)提高(gao)(gao)空(kong)(kong)調(diao)(diao)效(xiao)果。此(ci)外(wai)(wai)，在(zai)(zai)使(shi)用(yong)(yong)空(kong)(kong)調(diao)(diao)除霜除霧時，要使(shi)用(yong)(yong)外(wai)(wai)循(xun)(xun)(xun)環(huan)(huan)(huan)(huan)(huan)才有效(xiao)。