屋頂風機的起動調試:
屋頂(ding)(ding)風(feng)(feng)機可(ke)用(yong)(yong)于建筑物屋頂(ding)(ding)的(de)(de)(de)通(tong)風(feng)(feng)和通(tong)風(feng)(feng)。本(ben)著室內熱氣流上升,冷空氣下(xia)降的(de)(de)(de)天(tian)然原理,將(jiang)其(qi)安裝在屋頂(ding)(ding)上,以(yi)(yi)加快熱空氣的(de)(de)(de)揮發,到(dao)達(da)通(tong)風(feng)(feng)降溫的(de)(de)(de)作用(yong)(yong)。適(shi)用(yong)(yong)于大型商業(ye)超市,農牧(mu)業(ye),工(gong)業(ye)廠(chang)房,農業(ye)育種廠(chang)和元(yuan)件廠(chang);它的(de)(de)(de)特(te)點:風(feng)(feng)機不(bu)需要消耗(hao)功率,僅通(tong)過氣流的(de)(de)(de)功率就可(ke)以(yi)(yi)到(dao)達(da)排風(feng)(feng)和通(tong)風(feng)(feng)的(de)(de)(de)意圖。這種風(feng)(feng)機的(de)(de)(de)是易于安裝和節能。
風機答應(ying)全壓起(qi)(qi)(qi)動(dong)或(huo)降(jiang)壓起(qi)(qi)(qi)動(dong),但應(ying)留意(yi),全壓起(qi)(qi)(qi)動(dong)時的電流(liu)為(wei)5~7倍的額定電流(liu),降(jiang)壓起(qi)(qi)(qi)動(dong)轉距與電壓平方成正(zheng)比,當電網容(rong)量不足時,應(ying)選用降(jiang)壓起(qi)(qi)(qi)動(dong)。
2.試車時人數不(bu)少于(yu)兩人,一人控制電(dian)(dian)(dian)源,一人調查(cha)風機工(gong)作(zuo)狀況(kuang),發現(xian)異常現(xian)象立即停機查(cha)看(kan);首先查(cha)看(kan)旋轉(zhuan)方向是(shi)(shi)否(fou)(fou)正(zheng)確;風機過程中,應查(cha)看(kan)各相工(gong)作(zuo)電(dian)(dian)(dian)流是(shi)(shi)否(fou)(fou)平衡,電(dian)(dian)(dian)流是(shi)(shi)否(fou)(fou)超越額定(ding)電(dian)(dian)(dian)流;若有不(bu)正(zheng)常現(xian)象,應中止查(cha)看(kan)。工(gong)作(zuo)五分鐘(zhong)后,停機查(cha)看(kan)風機是(shi)(shi)否(fou)(fou)有異常現(xian)象,承認無異常現(xian)象再開(kai)機工(gong)作(zuo)。
3.雙速(su)(su)風(feng)機(ji)試(shi)車時,應先發(fa)動低(di)速(su)(su),并查看旋轉(zhuan)方向(xiang)是否正確;起動高速(su)(su)時要(yao)待風(feng)機(ji)靜止后再起,以防高速(su)(su)反向(xiang)旋轉(zhuan),引(yin)起開關跳閘及電機(ji)受損(sun)。
4.風(feng)(feng)機(ji)到達(da)正(zheng)常運(yun)速時,應(ying)(ying)檢(jian)測風(feng)(feng)機(ji)各相輸(shu)入電源是(shi)否正(zheng)常,風(feng)(feng)機(ji)的(de)工(gong)作電流(liu)不能(neng)超越(yue)其(qi)額(e)定電流(liu),若工(gong)作電流(liu)超越(yue)其(qi)額(e)定電流(liu),應(ying)(ying)查看供應(ying)(ying)風(feng)(feng)機(ji)的(de)電壓是(shi)否正(zheng)常。
5.對離心風(feng)(feng)機(ji)和風(feng)(feng)機(ji)箱,所需(xu)電(dian)機(ji)功率是指在待(dai)定工(gong)況下,加上機(ji)械(xie)損失與應有的(de)儲備量而(er)言,并非出(chu)風(feng)(feng)口(kou)(kou)全(quan)開時(shi)所需(xu)的(de)功率,如風(feng)(feng)機(ji)的(de)出(chu)風(feng)(feng)口(kou)(kou)不接(jie)管道或未加外界阻力而(er)進行(xing)空工(gong)作(zuo),則(ze)(ze)電(dian)機(ji)有焚毀的(de)風(feng)(feng)險,為了起見,應在風(feng)(feng)機(ji)的(de)出(chu)風(feng)(feng)口(kou)(kou)或入(ru)口(kou)(kou)管路(lu)加上閥門,起動風(feng)(feng)機(ji)時(shi)關閉,工(gong)作(zuo)后將(jiang)閥門漸(jian)漸(jian)敞開,到達規(gui)則(ze)(ze)工(gong)況為止,并留意風(feng)(feng)機(ji)電(dian)流是否超越規(gui)則(ze)(ze)值。