風(feng)(feng)機(ji)(ji)是(shi)(shi)依靠(kao)輸(shu)(shu)入的(de)機(ji)(ji)械能(neng)，提高氣(qi)(qi)體(ti)(ti)(ti)壓力并排送氣(qi)(qi)體(ti)(ti)(ti)的(de)機(ji)(ji)械，它(ta)是(shi)(shi)一(yi)種從動的(de)流體(ti)(ti)(ti)機(ji)(ji)械。風(feng)(feng)機(ji)(ji)是(shi)(shi)中國對氣(qi)(qi)體(ti)(ti)(ti)壓縮和氣(qi)(qi)體(ti)(ti)(ti)輸(shu)(shu)送機(ji)(ji)械的(de)習(xi)慣簡稱，通(tong)常所(suo)說的(de)風(feng)(feng)機(ji)(ji)包括通(tong)風(feng)(feng)機(ji)(ji)，鼓風(feng)(feng)機(ji)(ji)，風(feng)(feng)力發(fa)電機(ji)(ji)。
風(feng)機廣泛用于工廠(chang)、礦井、隧道(dao)、冷卻塔、車輛(liang)、船舶(bo)和建筑物(wu)的通風(feng)、排塵和冷卻，鍋爐和工業爐窯的通風(feng)和引風(feng)；空氣調節(jie)設(she)備和家用電器設(she)備中的冷卻和通風(feng)；谷物(wu)的烘干和選送，風(feng)洞風(feng)源(yuan)和氣墊船的充氣和推進等

風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)，是用(yong)于(yu)空(kong)氣輸送(song)和(he)(he)分(fen)布的管(guan)(guan)(guan)(guan)道系統。有(you)復(fu)合風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)和(he)(he)無機(ji)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)兩種。復(fu)合風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)以Durkduct風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)為代表。可按截面形(xing)(xing)狀和(he)(he)材質分(fen)類。風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)制作不銹鋼風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)制作是在咬口縫、鉚釘縫、法蘭(lan)翻邊四角等(deng)縫隙處涂(tu)上密封(feng)膠（如(ru)中性玻璃膠）。涂(tu)密封(feng)膠前(qian)應(ying)清除表面塵土和(he)(he)油(you)污。按截面形(xing)(xing)狀，風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)可分(fen)為圓形(xing)(xing)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)，矩(ju)形(xing)(xing)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)，扁圓風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)等(deng)多種，其中圓形(xing)(xing)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)阻力小但高度尺(chi)寸大，制作復(fu)雜。所以應(ying)用(yong)以矩(ju)形(xing)(xing)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)為主。按材質，風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)可分(fen)為金屬風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)，復(fu)合風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)，高分(fen)子風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)。