排風(feng)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)是送風(feng)、排風(feng)、除(chu)塵(chen)(chen)、氣力輸送以(yi)及防、排煙系統工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)的統稱。通風(feng)噴油工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、凈化(hua)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、濕(shi)簾(lian)墻降(jiang)溫工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、無塵(chen)(chen)潔凈工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、噴油凈化(hua)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、脈(mo)沖(chong)除(chu)塵(chen)(chen)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、木工(gong)(gong)(gong)車間除(chu)塵(chen)(chen)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、旋風(feng)除(chu)塵(chen)(chen)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、環保空調工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、中央(yang)空調工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、廢氣凈化(hua)工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)、流水線工(gong)(gong)(gong)程(cheng)(cheng)(cheng)(cheng)。

通(tong)風(feng)(feng)(feng)(feng)機(ji)(fan)是(shi)依靠輸入的(de)機(ji)械能，提高氣(qi)體(ti)(ti)(ti)壓力并(bing)排送氣(qi)體(ti)(ti)(ti)的(de)機(ji)械，它是(shi)一(yi)種從(cong)動的(de)流體(ti)(ti)(ti)機(ji)械。 通(tong)風(feng)(feng)(feng)(feng)機(ji)廣(guang)泛用(yong)于(yu)工廠、礦井、隧道、冷(leng)卻塔、車輛、船舶(bo)和(he)(he)建筑物的(de)通(tong)風(feng)(feng)(feng)(feng)、排塵和(he)(he)冷(leng)卻；鍋爐(lu)和(he)(he)工業爐(lu)窯(yao)的(de)通(tong)風(feng)(feng)(feng)(feng)和(he)(he)引(yin)風(feng)(feng)(feng)(feng)；空氣(qi)調(diao)節(jie)設備和(he)(he)家用(yong)電器設備中的(de)冷(leng)卻和(he)(he)通(tong)風(feng)(feng)(feng)(feng)；谷物的(de)烘干和(he)(he)選送；風(feng)(feng)(feng)(feng)洞風(feng)(feng)(feng)(feng)源和(he)(he)氣(qi)墊船的(de)充氣(qi)和(he)(he)推(tui)進等。 通(tong)風(feng)(feng)(feng)(feng)機(ji)的(de)工作(zuo)(zuo)原理與透(tou)平壓縮機(ji)基(ji)(ji)本相同，只(zhi)是(shi)由于(yu)氣(qi)體(ti)(ti)(ti)流速較(jiao)低，壓力變化(hua)不大，一(yi)般不需要考(kao)慮(lv)氣(qi)體(ti)(ti)(ti)比容的(de)變化(hua)，即把(ba)氣(qi)體(ti)(ti)(ti)作(zuo)(zuo)為不可(ke)壓縮流體(ti)(ti)(ti)處理。 通(tong)風(feng)(feng)(feng)(feng)機(ji)已有悠久(jiu)的(de)歷史。中國在(zai)公元前許多(duo)年就(jiu)已制造(zao)出簡單的(de)木制礱谷風(feng)(feng)(feng)(feng)車，它的(de)作(zuo)(zuo)用(yong)原理與現代(dai)離(li)心(xin)通(tong)風(feng)(feng)(feng)(feng)機(ji)基(ji)(ji)本相同。