排風工(gong)(gong)程(cheng)(cheng)(cheng)是(shi)送風、排風、除(chu)塵(chen)(chen)(chen)、氣(qi)力輸送以及防(fang)、排煙系統工(gong)(gong)程(cheng)(cheng)(cheng)的(de)統稱(cheng)。通風噴油(you)工(gong)(gong)程(cheng)(cheng)(cheng)、凈(jing)化工(gong)(gong)程(cheng)(cheng)(cheng)、濕簾墻降溫工(gong)(gong)程(cheng)(cheng)(cheng)、無塵(chen)(chen)(chen)潔凈(jing)工(gong)(gong)程(cheng)(cheng)(cheng)、噴油(you)凈(jing)化工(gong)(gong)程(cheng)(cheng)(cheng)、脈(mo)沖除(chu)塵(chen)(chen)(chen)工(gong)(gong)程(cheng)(cheng)(cheng)、木工(gong)(gong)車間除(chu)塵(chen)(chen)(chen)工(gong)(gong)程(cheng)(cheng)(cheng)、旋風除(chu)塵(chen)(chen)(chen)工(gong)(gong)程(cheng)(cheng)(cheng)、環保(bao)空調工(gong)(gong)程(cheng)(cheng)(cheng)、中央空調工(gong)(gong)程(cheng)(cheng)(cheng)、廢氣(qi)凈(jing)化工(gong)(gong)程(cheng)(cheng)(cheng)、流水(shui)線工(gong)(gong)程(cheng)(cheng)(cheng)。

通(tong)(tong)(tong)風(feng)(feng)(feng)機(ji)(fan)是(shi)(shi)依靠輸入的(de)(de)(de)(de)機(ji)械能，提(ti)高(gao)氣體(ti)(ti)壓力(li)并排送(song)氣體(ti)(ti)的(de)(de)(de)(de)機(ji)械，它是(shi)(shi)一種(zhong)從動的(de)(de)(de)(de)流(liu)體(ti)(ti)機(ji)械。 通(tong)(tong)(tong)風(feng)(feng)(feng)機(ji)廣泛(fan)用于工(gong)廠、礦井(jing)、隧道、冷(leng)卻塔、車(che)輛、船(chuan)舶和(he)(he)建筑物的(de)(de)(de)(de)通(tong)(tong)(tong)風(feng)(feng)(feng)、排塵和(he)(he)冷(leng)卻；鍋爐和(he)(he)工(gong)業爐窯的(de)(de)(de)(de)通(tong)(tong)(tong)風(feng)(feng)(feng)和(he)(he)引風(feng)(feng)(feng)；空氣調節設備(bei)和(he)(he)家(jia)用電器設備(bei)中(zhong)的(de)(de)(de)(de)冷(leng)卻和(he)(he)通(tong)(tong)(tong)風(feng)(feng)(feng)；谷(gu)物的(de)(de)(de)(de)烘干和(he)(he)選送(song)；風(feng)(feng)(feng)洞風(feng)(feng)(feng)源和(he)(he)氣墊船(chuan)的(de)(de)(de)(de)充(chong)氣和(he)(he)推進(jin)等。 通(tong)(tong)(tong)風(feng)(feng)(feng)機(ji)的(de)(de)(de)(de)工(gong)作原(yuan)理與透平壓縮機(ji)基本(ben)相(xiang)同(tong)，只是(shi)(shi)由于氣體(ti)(ti)流(liu)速較低，壓力(li)變(bian)化(hua)不(bu)大，一般不(bu)需要考慮氣體(ti)(ti)比(bi)容的(de)(de)(de)(de)變(bian)化(hua)，即把氣體(ti)(ti)作為(wei)不(bu)可(ke)壓縮流(liu)體(ti)(ti)處理。 通(tong)(tong)(tong)風(feng)(feng)(feng)機(ji)已有悠久(jiu)的(de)(de)(de)(de)歷史。中(zhong)國在公元前(qian)許多年(nian)就(jiu)已制造出(chu)簡(jian)單的(de)(de)(de)(de)木制礱谷(gu)風(feng)(feng)(feng)車(che)，它的(de)(de)(de)(de)作用原(yuan)理與現代離心通(tong)(tong)(tong)風(feng)(feng)(feng)機(ji)基本(ben)相(xiang)同(tong)。