汽車空調系統(tong)有(you)兩個主要的(de)空調管(guan),一根是(shi)從蒸發(fa)器(qi)到(dao)壓縮機的(de)低壓管(guan),另外(wai)一根是(shi)從冷凝器(qi)到(dao)蒸發(fa)器(qi)的(de)高壓管(guan)。包裹這兩根空調管(guan)可以提高空調系統(tong)的(de)制(zhi)冷性能(neng)嗎?答(da)案是(shi)肯定(ding)的(de),但是(shi)包裹的(de)方(fang)法和位(wei)置是(shi)很(hen)有(you)講究。如果包裹不當,可能(neng)會起到(dao)相反的(de)效果。
汽(qi)車空調(diao)原理:壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)往往是安裝在(zai)發(fa)(fa)動(dong)機(ji)上,并(bing)用皮帶驅動(dong)(也有(you)直接驅動(dong)的(de)(de)),冷(leng)(leng)凝器(qi)(qi)安裝在(zai)汽(qi)車散(san)熱器(qi)(qi)的(de)(de)前方,而蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)在(zai)車里面(mian),工作時(shi)從蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)出來的(de)(de)低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)態致(zhi)(zhi)(zhi)冷(leng)(leng)劑流經壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)變成(cheng)高壓(ya)(ya)(ya)(ya)(ya)(ya)高溫(wen)(wen)氣(qi)(qi)體,經過冷(leng)(leng)凝器(qi)(qi)散(san)熱管降溫(wen)(wen)冷(leng)(leng)卻(que)變成(cheng)高壓(ya)(ya)(ya)(ya)(ya)(ya)低(di)溫(wen)(wen)的(de)(de)液體,再經過貯液干燥(zao)器(qi)(qi)除濕(shi)與緩沖,然后以較穩定的(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)力和流量(liang)流向膨脹(zhang)閥(fa),經節(jie)流和降壓(ya)(ya)(ya)(ya)(ya)(ya)最后流向蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)。致(zhi)(zhi)(zhi)冷(leng)(leng)劑一(yi)(yi)遇低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)環境即蒸(zheng)(zheng)(zheng)發(fa)(fa),吸收大量(liang)熱能(neng)。車廂(xiang)內的(de)(de)空氣(qi)(qi)不(bu)斷(duan)流經蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi),車廂(xiang)內溫(wen)(wen)度也就因此(ci)降低(di)。液態致(zhi)(zhi)(zhi)冷(leng)(leng)劑流經蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)后再次變成(cheng)低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)體,又重(zhong)新被(bei)吸入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)進(jin)行下一(yi)(yi)次的(de)(de)循環工作。在(zai)整個系統中,膨脹(zhang)閥(fa)是控制致(zhi)(zhi)(zhi)冷(leng)(leng)劑進(jin)入(ru)(ru)蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)的(de)(de)機(ji)關,致(zhi)(zhi)(zhi)冷(leng)(leng)劑進(jin)入(ru)(ru)蒸(zheng)(zheng)(zheng)發(fa)(fa)器(qi)(qi)太多就不(bu)易蒸(zheng)(zheng)(zheng)發(fa)(fa)而太少冷(leng)(leng)氣(qi)(qi)又會(hui)不(bu)夠,因此(ci)膨脹(zhang)閥(fa)是調(diao)節(jie)中樞。而壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)機(ji)是系統的(de)(de)心臟,系統循環的(de)(de)動(dong)力源泉。
沃爾沃V40車(che)在首發。預計將于2012年(nian)5月在歐洲上市,2013年(nian)初以(yi)進口方式進入國(guo)內市場。沃爾沃V40被定位(wei)為一款高端緊(jin)湊級(ji)五門掀背車(che)型(xing)。從外(wai)觀及(ji)產(chan)品定位(wei)來看,鎖定的目標(biao)是寶馬1系和奧(ao)迪(di)A3以(yi)及(ji)新款奔馳A級(ji)。
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