變(bian)頻(pin)調速泵(beng)在二次加壓系統和消防系統中(zhong)應用探討

      隨著(zhu)科學技(ji)(ji)術的迅猛發(fa)展，電(dian)力電(dian)子技(ji)(ji)術、微電(dian)子技(ji)(ji)術及現代控(kong)(kong)制(zhi)(zhi)(zhi)理(li)論(lun)的不斷(duan)進步，又因為變(bian)頻(pin)(pin)器所(suo)具有的高(gao)效率性(xing)(xing)(xing)能(neng)和良(liang)好的控(kong)(kong)制(zhi)(zhi)(zhi)特性(xing)(xing)(xing)，目前(qian)在(zai)交(jiao)流電(dian)動機(ji)的速度控(kong)(kong)制(zhi)(zhi)(zhi)中較多采用(yong)。使用(yong)變(bian)頻(pin)(pin)器一個突出的優(you)點(dian)就是節省(sheng)能(neng)源，而且(qie)通過發(fa)揮其(qi)理(li)想的控(kong)(kong)制(zhi)(zhi)(zhi)特性(xing)(xing)(xing)，二次加壓系統(tong)使用(yong)性(xing)(xing)(xing)能(neng)可以大幅(fu)提高(gao)。但在(zai)智(zhi)能(neng)建筑(zhu)中，生活(huo)給(gei)水(shui)和消防給(gei)水(shui)各(ge)有其(qi)特點(dian)，在(zai)節能(neng)和可靠性(xing)(xing)(xing)方(fang)面要作(zuo)具體(ti)分析，從而選擇更合(he)理(li)控(kong)(kong)制(zhi)(zhi)(zhi)方(fang)式(shi)。

1、二次加壓系統(tong)變頻調速的基本原理(li)

      由(you)離心泵原理，在(zai)相似情況下水(shui)泵的(de)(de)流量、揚(yang)程和功率分(fen)別與其轉速的(de)(de)一(yi)次方(fang)、二(er)次方(fang)和三(san)次方(fang)成正(zheng)比(bi)。對(dui)于用(yong)(yong)水(shui)經常變化的(de)(de)場合，二(er)次加(jia)壓系統采用(yong)(yong)變頻調(diao)速泵供水(shui)，可(ke)以顯著降低節流損耗，具(ju)有(you)明顯的(de)(de)節能(neng)效果(guo)。按用(yong)(yong)途(tu)建筑給(gei)水(shui)分(fen)為生(sheng)(sheng)活(生(sheng)(sheng)產)給(gei)水(shui)和消防(fang)給(gei)水(shui)二(er)大類。在(zai)生(sheng)(sheng)活二(er)次加(jia)壓系統中(zhong)(zhong)采用(yong)(yong)變頻泵調(diao)速控制(zhi)，具(ju)有(you)節能(neng)，供水(shui)壓力可(ke)調(diao)等突出(chu)優點，在(zai)國(guo)內外(wai)獲得了愈(yu)來愈(yu)廣泛的(de)(de)應用(yong)(yong)。在(zai)消防(fang)給(gei)水(shui)中(zhong)(zhong)對(dui)穩壓泵以及在(zai)消防(fang)泵巡(xun)檢時(shi)最好(hao)采用(yong)(yong)變頻控制(zhi)，但在(zai)消防(fang)泵滅火控制(zhi)中(zhong)(zhong)應采用(yong)(yong)直接啟(qi)動(dong)或降壓啟(qi)動(dong)控制(zhi)方(fang)式。

三相交流電動(dong)機的轉(zhuan)速與(yu)頻率(lv)、極數及(ji)轉(zhuan)差(cha)率(lv)之間的關系如下：

n=60f(1—s)／p其中:

n——每(mei)分鐘的轉(zhuan)速；

f——交流電的頻(pin)率；

s——轉差率；

p——磁極(ji)對數。

      在三(san)相電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)中(zhong)對轉速的調(diao)(diao)(diao)節有多種方法，如通(tong)過調(diao)(diao)(diao)整(zheng)交(jiao)流電(dian)(dian)(dian)(dian)(dian)的頻(pin)(pin)(pin)率(lv)(lv)、電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)的極(ji)(ji)數(shu)以(yi)及轉差率(lv)(lv)來實(shi)現。以(yi)往人(ren)(ren)們通(tong)過對電(dian)(dian)(dian)(dian)(dian)機(ji)的極(ji)(ji)數(shu)變化來調(diao)(diao)(diao)整(zheng)電(dian)(dian)(dian)(dian)(dian)機(ji)的轉速，很(hen)少采用(yong)頻(pin)(pin)(pin)率(lv)(lv)調(diao)(diao)(diao)節，但隨著電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)子技(ji)(ji)術、微電(dian)(dian)(dian)(dian)(dian)子技(ji)(ji)術的發(fa)展(zhan)，變頻(pin)(pin)(pin)控(kong)制技(ji)(ji)術的不斷成熟，人(ren)(ren)們發(fa)現通(tong)過調(diao)(diao)(diao)整(zheng)電(dian)(dian)(dian)(dian)(dian)源的頻(pin)(pin)(pin)率(lv)(lv)調(diao)(diao)(diao)速要比(bi)通(tong)過調(diao)(diao)(diao)整(zheng)電(dian)(dian)(dian)(dian)(dian)機(ji)的極(ji)(ji)數(shu)與(yu)轉差率(lv)(lv)調(diao)(diao)(diao)速方便得多，效果也好得多。所以(yi)現在，一般我們對三(san)相交(jiao)流電(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)進行轉速調(diao)(diao)(diao)整(zheng)都通(tong)過調(diao)(diao)(diao)節三(san)相交(jiao)流電(dian)(dian)(dian)(dian)(dian)的頻(pin)(pin)(pin)率(lv)(lv)來實(shi)現，其(qi)應用(yong)范圍越來越廣。以(yi)下(xia)是其(qi)在智能(neng)建筑中(zhong)的一些(xie)應用(yong)。

2、變頻器(qi)在恒壓自動(dong)二次加壓系統中的(de)應用

      在智能建(jian)(jian)筑(zhu)日(ri)益增多的(de)今天，供(gong)水問題(ti)成(cheng)為業主(zhu)比較(jiao)關心的(de)問題(ti)，所以變頻恒壓自動二次加壓系統便提上了日(ri)程。以前在一般建(jian)(jian)筑(zhu)的(de)建(jian)(jian)設(she)(she)中往往需要建(jian)(jian)設(she)(she)一個(ge)二次加壓(ya)系(xi)統水泵房并(bing)采用(yong)(yong)變(bian)(bian)(bian)頻器(qi)(qi)實(shi)現恒壓自動供(gong)(gong)水(shui)。一般情況下，為保證(zheng)建筑的供(gong)(gong)水(shui)正常(chang)，在(zai)設計時往往設計成(cheng)(cheng)“一用(yong)(yong)兩備(bei)”三臺水(shui)泵。由(you)一臺變(bian)(bian)(bian)頻器(qi)(qi)(附(fu)加(jia)PID調(diao)(diao)節器(qi)(qi)、單片機(ji)、PLC等器(qi)(qi)件(jian)構成(cheng)(cheng)控(kong)(kong)制(zhi)系(xi)統(tong))拖動三臺水(shui)泵循(xun)(xun)環運轉。與(yu)空(kong)調(diao)(diao)水(shui)泵控(kong)(kong)制(zhi)不(bu)同，二次加(jia)壓系(xi)統(tong)自動控(kong)(kong)制(zhi)系(xi)統(tong)通過壓力傳感(gan)器(qi)(qi)采集管網中的壓力并(bing)將其轉換成(cheng)(cheng)模(mo)擬信號進(jin)行變(bian)(bian)(bian)頻控(kong)(kong)制(zhi)。這樣變(bian)(bian)(bian)頻恒壓二次加(jia)壓系(xi)統(tong)直(zhi)接(jie)取代水(shui)塔、高位水(shui)箱及(ji)傳統(tong)的氣壓罐供(gong)(gong)水(shui)裝置，為局部加(jia)壓供(gong)(gong)水(shui)開辟了(le)新的途(tu)徑。另外由(you)于(yu)水(shui)泵耗電(dian)功(gong)率與(yu)電(dian)機(ji)轉速的三次方成(cheng)(cheng)正比關系(xi)，所以水(shui)泵調(diao)(diao)速運行的節能(neng)效果非(fei)常(chang)明顯(xian)，平均(jun)耗電(dian)量較通常(chang)供(gong)(gong)水(shui)方式節省(sheng)40％。與(yu)可(ke)編程控(kong)(kong)制(zhi)器(qi)(qi)結合使用(yong)(yong)，可(ke)實(shi)現循(xun)(xun)環變(bian)(bian)(bian)頻，電(dian)機(ji)軟啟動，具有(you)欠壓保護(hu)、過壓保護(hu)、短路保護(hu)、過流保護(hu)功(gong)能(neng)，工作穩定可(ke)靠，大(da)大(da)延長(chang)了(le)設備(bei)的使用(yong)(yong)壽(shou)命。下面以遼寧省(sheng)某市(shi)寶典大(da)廈供(gong)(gong)水(shui)系(xi)統(tong)為例介紹(shao)其原理。

      大(da)廈(sha)二次加壓(ya)系(xi)統(tong)恒(heng)壓(ya)供(gong)水(shui)(shui)采用(yong)三臺水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)(beng),其中1#泵(beng)(beng)(beng)(beng)(beng)(beng)為主泵(beng)(beng)(beng)(beng)(beng)(beng)，2#、3#泵(beng)(beng)(beng)(beng)(beng)(beng)為備用(yong)泵(beng)(beng)(beng)(beng)(beng)(beng)。首先，1#泵(beng)(beng)(beng)(beng)(beng)(beng)由(you)變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)供(gong)電(dian)(dian)工(gong)(gong)作(zuo)，水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)(beng)電(dian)(dian)機轉速隨(sui)著調節器(qi)(qi)(qi)輸出給變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)控制信號(hao)的(de)變(bian)化而(er)改變(bian)，以保持管網(wang)(wang)壓(ya)力的(de)穩定(ding)。用(yong)水(shui)(shui)量(liang)(liang)大(da)時(shi)(shi)，變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)輸出頻(pin)(pin)(pin)率(lv)(lv)升(sheng)高；用(yong)水(shui)(shui)量(liang)(liang)小(xiao)時(shi)(shi)，頻(pin)(pin)(pin)率(lv)(lv)降(jiang)低。當(dang)頻(pin)(pin)(pin)率(lv)(lv)上升(sheng)到50Hz(即水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)(beng)全(quan)速運(yun)(yun)(yun)(yun)轉時(shi)(shi))仍不能滿(man)足(zu)供(gong)水(shui)(shui)需(xu)要時(shi)(shi)，則(ze)PLC自(zi)(zi)動(dong)將1#泵(beng)(beng)(beng)(beng)(beng)(beng)切換到工(gong)(gong)頻(pin)(pin)(pin)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)，1#泵(beng)(beng)(beng)(beng)(beng)(beng)由(you)電(dian)(dian)網(wang)(wang)供(gong)電(dian)(dian)全(quan)速運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)，2#泵(beng)(beng)(beng)(beng)(beng)(beng)由(you)變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)供(gong)電(dian)(dian)投入(ru)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)，如(ru)果(guo)2#泵(beng)(beng)(beng)(beng)(beng)(beng)電(dian)(dian)機達到滿(man)轉速時(shi)(shi)仍不能滿(man)足(zu)供(gong)水(shui)(shui)要求(qiu)，則(ze)PLC自(zi)(zi)動(dong)將2#泵(beng)(beng)(beng)(beng)(beng)(beng)切換到工(gong)(gong)頻(pin)(pin)(pin)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)，3#泵(beng)(beng)(beng)(beng)(beng)(beng)由(you)變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)供(gong)電(dian)(dian)投入(ru)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)，依此(ci)(ci)規律逐個投入(ru)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)；當(dang)1#—2#泵(beng)(beng)(beng)(beng)(beng)(beng)都處(chu)于(yu)工(gong)(gong)頻(pin)(pin)(pin)全(quan)速運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)方(fang)式，3#處(chu)于(yu)變(bian)頻(pin)(pin)(pin)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)工(gong)(gong)作(zuo)方(fang)式時(shi)(shi)，如(ru)果(guo)此(ci)(ci)時(shi)(shi)用(yong)水(shui)(shui)量(liang)(liang)減小(xiao)，變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)輸出頻(pin)(pin)(pin)率(lv)(lv)下降(jiang)，當(dang)頻(pin)(pin)(pin)率(lv)(lv)到達一(yi)定(ding)的(de)下限時(shi)(shi)，供(gong)水(shui)(shui)量(liang)(liang)仍大(da)于(yu)用(yong)水(shui)(shui)量(liang)(liang)，則(ze)系(xi)統(tong)自(zi)(zi)動(dong)將3#泵(beng)(beng)(beng)(beng)(beng)(beng)停(ting)(ting)止(zhi)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)。同樣，3#泵(beng)(beng)(beng)(beng)(beng)(beng)停(ting)(ting)機后(hou)，如(ru)果(guo)此(ci)(ci)時(shi)(shi)供(gong)水(shui)(shui)量(liang)(liang)還大(da)于(yu)用(yong)水(shui)(shui)量(liang)(liang)，則(ze)系(xi)統(tong)自(zi)(zi)動(dong)將2#泵(beng)(beng)(beng)(beng)(beng)(beng)停(ting)(ting)止(zhi)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)，依此(ci)(ci)類推。如(ru)果(guo)此(ci)(ci)時(shi)(shi)用(yong)水(shui)(shui)量(liang)(liang)又大(da)于(yu)供(gong)水(shui)(shui)量(liang)(liang)，則(ze)系(xi)統(tong)自(zi)(zi)動(dong)將2#泵(beng)(beng)(beng)(beng)(beng)(beng)由(you)變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)供(gong)電(dian)(dian)運(yun)(yun)(yun)(yun)行(xing)(xing)(xing)……，所(suo)有水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)(beng)電(dian)(dian)機從停(ting)(ting)止(zhi)到滿(man)載(zai)工(gong)(gong)作(zuo)及從滿(man)載(zai)工(gong)(gong)作(zuo)到停(ting)(ting)止(zhi)都由(you)變(bian)頻(pin)(pin)(pin)器(qi)(qi)(qi)來控制，實現帶(dai)載(zai)軟(ruan)啟(qi)動(dong)，避免了(le)啟(qi)動(dong)沖擊(ji)(ji)電(dian)(dian)流和啟(qi)動(dong)給水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)(beng)電(dian)(dian)機帶(dai)來機械(xie)沖擊(ji)(ji)，保證了(le)管網(wang)(wang)壓(ya)力穩定(ding)，滿(man)足(zu)了(le)大(da)廈(sha)的(de)正常供(gong)水(shui)(shui)。

3、變頻器在消防泵巡檢柜中的應用

      在(zai)消防(fang)(fang)(fang)(fang)(fang)(fang)給水系統(tong)中(zhong)，平時(shi)消防(fang)(fang)(fang)(fang)(fang)(fang)管網由增(zeng)壓(ya)(ya)、穩壓(ya)(ya)泵(beng)(beng)(beng)穩壓(ya)(ya)，使之保(bao)持(chi)在(zai)高壓(ya)(ya)(消防(fang)(fang)(fang)(fang)(fang)(fang)水壓(ya)(ya))的(de)(de)(de)(de)準備(bei)(bei)消防(fang)(fang)(fang)(fang)(fang)(fang)狀態。當(dang)發生(sheng)火(huo)(huo)災(zai)(zai)，啟(qi)動(dong)(dong)主(zhu)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)立即可(ke)(ke)以(yi)(yi)(yi)提供規定壓(ya)(ya)力和流量(liang)的(de)(de)(de)(de)消防(fang)(fang)(fang)(fang)(fang)(fang)用(yong)(yong)(yong)水。按我國消防(fang)(fang)(fang)(fang)(fang)(fang)規范(fan)，水消防(fang)(fang)(fang)(fang)(fang)(fang)的(de)(de)(de)(de)延續時(shi)間，最長按3小(xiao)時(shi)考(kao)慮，因此主(zhu)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)的(de)(de)(de)(de)節(jie)能(neng)問(wen)題可(ke)(ke)不(bu)予考(kao)慮，因而(er)也(ye)無必要(yao)采(cai)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)調速(su)以(yi)(yi)(yi)節(jie)約電(dian)能(neng)。眾所(suo)(suo)周知(zhi)，發生(sheng)火(huo)(huo)災(zai)(zai)是百(bai)年(nian)、千年(nian)一(yi)(yi)(yi)遇的(de)(de)(de)(de)事件，在(zai)一(yi)(yi)(yi)般情況下是不(bu)會發生(sheng)的(de)(de)(de)(de)，變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)是一(yi)(yi)(yi)種電(dian)子器(qi)(qi)件，如果(guo)采(cai)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)控(kong)制(zhi)(zhi)主(zhu)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)變(bian)頻(pin)(pin)(pin)(pin)調速(su)，消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)長期備(bei)(bei)而(er)不(bu)用(yong)(yong)(yong)，在(zai)發生(sheng)火(huo)(huo)災(zai)(zai)使用(yong)(yong)(yong)時(shi)反而(er)容(rong)易發生(sheng)故(gu)障，降(jiang)低了消防(fang)(fang)(fang)(fang)(fang)(fang)設備(bei)(bei)的(de)(de)(de)(de)可(ke)(ke)靠(kao)(kao)性。另一(yi)(yi)(yi)個重要(yao)問(wen)題是消防(fang)(fang)(fang)(fang)(fang)(fang)備(bei)(bei)用(yong)(yong)(yong)泵(beng)(beng)(beng)的(de)(de)(de)(de)自(zi)動(dong)(dong)投入控(kong)制(zhi)(zhi)問(wen)題。此外，變(bian)頻(pin)(pin)(pin)(pin)控(kong)制(zhi)(zhi)系統(tong)的(de)(de)(de)(de)電(dian)氣較(jiao)復雜(za)，會降(jiang)低可(ke)(ke)靠(kao)(kao)性，增(zeng)加造價(jia)。消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)的(de)(de)(de)(de)功率(lv)一(yi)(yi)(yi)般較(jiao)大，其控(kong)制(zhi)(zhi)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)的(de)(de)(de)(de)價(jia)格也(ye)相應(ying)(ying)提高。綜上所(suo)(suo)述，對(dui)(dui)于(yu)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)而(er)言，從節(jie)能(neng)、可(ke)(ke)靠(kao)(kao)性和造價(jia)幾點考(kao)慮，無必要(yao)采(cai)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)調速(su)技術。如果(guo)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)采(cai)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)調速(su)控(kong)制(zhi)(zhi)，由于(yu)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)(消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)、噴淋(lin)泵(beng)(beng)(beng))長期不(bu)投入使用(yong)(yong)(yong)，容(rong)易發生(sheng)泵(beng)(beng)(beng)生(sheng)銹堵轉等現(xian)象，故(gu)應(ying)(ying)對(dui)(dui)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)定期進行(xing)(xing)低頻(pin)(pin)(pin)(pin)運(yun)轉，以(yi)(yi)(yi)免有消防(fang)(fang)(fang)(fang)(fang)(fang)需要(yao)時(shi)，消防(fang)(fang)(fang)(fang)(fang)(fang)水泵(beng)(beng)(beng)不(bu)能(neng)正常起(qi)動(dong)(dong)，貽誤火(huo)(huo)災(zai)(zai)的(de)(de)(de)(de)撲救。所(suo)(suo)以(yi)(yi)(yi)現(xian)在(zai)我們(men)一(yi)(yi)(yi)般對(dui)(dui)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)進行(xing)(xing)自(zi)動(dong)(dong)巡(xun)檢(jian)(jian)，即通過(guo)消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)控(kong)制(zhi)(zhi)柜內的(de)(de)(de)(de)巡(xun)檢(jian)(jian)電(dian)路讓消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)每隔一(yi)(yi)(yi)段(duan)時(shi)間進行(xing)(xing)一(yi)(yi)(yi)次自(zi)啟(qi)動(dong)(dong)，巡(xun)檢(jian)(jian)時(shi)采(cai)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)控(kong)制(zhi)(zhi)，以(yi)(yi)(yi)利保(bao)養及(ji)節(jie)能(neng)。但在(zai)正常火(huo)(huo)災(zai)(zai)情況下，消防(fang)(fang)(fang)(fang)(fang)(fang)泵(beng)(beng)(beng)、噴淋(lin)泵(beng)(beng)(beng)一(yi)(yi)(yi)般通過(guo)直(zhi)接啟(qi)動(dong)(dong)、星(xing)三(san)角或自(zi)藕(ou)降(jiang)壓(ya)(ya)方式啟(qi)動(dong)(dong)，以(yi)(yi)(yi)滿足消防(fang)(fang)(fang)(fang)(fang)(fang)要(yao)求，且消防(fang)(fang)(fang)(fang)(fang)(fang)狀態時(shi)所(suo)(suo)有的(de)(de)(de)(de)非消防(fang)(fang)(fang)(fang)(fang)(fang)電(dian)源均已切斷(duan)，故(gu)一(yi)(yi)(yi)般情況下不(bu)采(cai)用(yong)(yong)(yong)變(bian)頻(pin)(pin)(pin)(pin)器(qi)(qi)啟(qi)動(dong)(dong)方式。

      按我(wo)國消(xiao)防規范(fan)，消(xiao)防泵(beng)(beng)應(ying)設有備用(yong)(yong)泵(beng)(beng)，備用(yong)(yong)泵(beng)(beng)應(ying)不(bu)小于(yu)任(ren)一臺主消(xiao)防泵(beng)(beng)。由多(duo)泵(beng)(beng)并(bing)(bing)聯(lian)恒(heng)(heng)壓(ya)供水(shui)理論，多(duo)泵(beng)(beng)并(bing)(bing)聯(lian)恒(heng)(heng)壓(ya)供水(shui)，變(bian)頻(pin)調速泵(beng)(beng)必須是(shi)(shi)其中最大的一臺泵(beng)(beng)，其余(yu)并(bing)(bing)聯(lian)泵(beng)(beng)自動(dong)投入或(huo)超出是(shi)(shi)由變(bian)頻(pin)控制器按用(yong)(yong)水(shui)流(liu)量變(bian)化自動(dong)控制的。如果變(bian)頻(pin)泵(beng)(beng)故障可(ke)能會導(dao)致變(bian)頻(pin)器跳閘(zha)，使全部消(xiao)防泵(beng)(beng)停泵(beng)(beng)。從這一點(dian)考慮(lv)，消(xiao)防泵(beng)(beng)采用(yong)(yong)變(bian)頻(pin)調速會降低(di)消(xiao)防供水(shui)的可(ke)靠性，不(bu)宜在水(shui)消(xiao)防系(xi)統中應(ying)用(yong)(yong)。

4、結論

      通過以上分析(xi)，我們知道變頻(pin)器(qi)在(zai)智(zhi)能建(jian)筑中(zhong)的(de)應用(yong)(yong)(yong)非常廣(guang)泛，也(ye)非常有效(xiao)。這(zhe)也(ye)是(shi)筆者在(zai)實(shi)際工(gong)作(zuo)過程中(zhong)使(shi)用(yong)(yong)(yong)變頻(pin)器(qi)在(zai)智(zhi)能建(jian)筑電(dian)氣(qi)自動控制(zhi)系(xi)統中(zhong)實(shi)現節(jie)能或控制(zhi)的(de)具體體會(hui)。變頻(pin)器(qi)在(zai)智(zhi)能建(jian)筑中(zhong)的(de)應用(yong)(yong)(yong)還遠遠不(bu)止這(zhe)些(xie)，其它系(xi)統如(ru)空調、通風、電(dian)梯等(deng)都有廣(guang)泛的(de)應用(yong)(yong)(yong)。可以相信(xin)，它的(de)應用(yong)(yong)(yong)將(jiang)隨著(zhu)電(dian)子技術的(de)發(fa)展(zhan)與變頻(pin)器(qi)的(de)不(bu)斷(duan)更新會(hui)越來越廣(guang)泛，將(jiang)會(hui)給(gei)國家和個(ge)人(ren)帶來巨大的(de)社會(hui)效(xiao)益和經濟效(xiao)益。