負(fu)(fu)(fu)壓(ya)排風(feng)機(ji)(ji)的(de)通風(feng)原理是將空(kong)(kong)(kong)氣(qi)(qi)向外排出，降(jiang)低(di)室(shi)(shi)內空(kong)(kong)(kong)氣(qi)(qi)壓(ya)力，使室(shi)(shi)內空(kong)(kong)(kong)氣(qi)(qi)變(bian)薄，形成(cheng)負(fu)(fu)(fu)壓(ya)區，空(kong)(kong)(kong)氣(qi)(qi)通過(guo)氣(qi)(qi)壓(ya)差補償流入室(shi)(shi)內。在工業廠房的(de)實際應(ying)用中(zhong)，廠房的(de)負(fu)(fu)(fu)壓(ya)排風(feng)機(ji)(ji)集(ji)中(zhong)安裝在廠房的(de)一(yi)側(ce)，進(jin)風(feng)口(kou)位于廠房的(de)另一(yi)側(ce)，空(kong)(kong)(kong)氣(qi)(qi)從進(jin)風(feng)口(kou)對流吹向負(fu)(fu)(fu)壓(ya)排風(feng)機(ji)(ji)。在此過(guo)程中(zhong)，負(fu)(fu)(fu)壓(ya)排風(feng)機(ji)(ji)附近的(de)門窗(chuang)保持關閉，迫使空(kong)(kong)(kong)氣(qi)(qi)通過(guo)進(jin)氣(qi)(qi)口(kou)一(yi)側(ce)的(de)門窗(chuang)流入車間(jian)(jian)。空(kong)(kong)(kong)氣(qi)(qi)從進(jin)風(feng)口(kou)有序(xu)排隊(dui)流入車間(jian)(jian)，流經車間(jian)(jian)，由(you)車間(jian)(jian)的(de)負(fu)(fu)(fu)壓(ya)排風(feng)機(ji)(ji)排出車間(jian)(jian)。