變頻(pin)恒壓(ya)供(gong)(gong)水(shui)(shui)(shui)(shui)是(shi)指在供(gong)(gong)水(shui)(shui)(shui)(shui)管(guan)網中用水(shui)(shui)(shui)(shui)量發(fa)生變化時，出(chu)(chu)口(kou)壓(ya)力保持(chi)不(bu)變的供(gong)(gong)水(shui)(shui)(shui)(shui)方式。供(gong)(gong)水(shui)(shui)(shui)(shui)管(guan)網的出(chu)(chu)口(kou)壓(ya)力值是(shi)根據用戶需求(qiu)確定的。傳統的供(gong)(gong)水(shui)(shui)(shui)(shui)方式是(shi)采用水(shui)(shui)(shui)(shui)塔、高水(shui)(shui)(shui)(shui)位(wei)箱、氣壓(ya)罐(guan)等設施實現(xian)的。
近年來，隨著變頻調速技術的日益成熟，其顯著的節能效果和可靠穩定的控制方式，在供水系統中得到廣泛的應用。變頻恒壓供水系統對水(shui)(shui)泵電機(ji)實行無級調速(su)，依據用(yong)水(shui)(shui)量及水(shui)(shui)壓(ya)變(bian)(bian)化通過微(wei)機(ji)檢測、運算，自(zi)動改變(bian)(bian)水(shui)(shui)泵轉速(su)保持水(shui)(shui)壓(ya)恒定以(yi)滿足(zu)用(yong)水(shui)(shui)要求，是(shi)(shi)目前最(zui)先(xian)進，合理的(de)(de)節(jie)能供水(shui)(shui)系統(tong)。與傳統(tong)的(de)(de)水(shui)(shui)塔、高位水(shui)(shui)箱、氣壓(ya)罐等供水(shui)(shui)方(fang)式比(bi)較，變(bian)(bian)頻恒壓(ya)供水(shui)(shui)不論是(shi)(shi)投(tou)資(zi)、運行的(de)(de)經濟性(xing)、還是(shi)(shi)系統(tong)的(de)(de)穩(wen)定性(xing)、可靠性(xing)、自(zi)動化程度等方(fang)面都具(ju)有很明顯的(de)(de)優勢。
變頻恒壓供水系統以管(guan)網(wang)水(shui)(shui)(shui)(shui)壓(ya)(或用(yong)戶(hu)(hu)用(yong)水(shui)(shui)(shui)(shui)流量(liang)(liang)(liang))為設定參數，通(tong)過微機控制變頻器的(de)(de)(de)輸出頻率(lv)從而自動(dong)調(diao)節(jie)水(shui)(shui)(shui)(shui)泵(beng)電機的(de)(de)(de)轉速，實(shi)現(xian)管(guan)網(wang)水(shui)(shui)(shui)(shui)壓(ya)的(de)(de)(de)閉環調(diao)節(jie)(PID)，使供水(shui)(shui)(shui)(shui)系統自動(dong)恒穩于設定的(de)(de)(de)壓(ya)力值(zhi)：即用(yong)水(shui)(shui)(shui)(shui)量(liang)(liang)(liang)增(zeng)加時(shi)(shi)，頻率(lv)升高(gao)，水(shui)(shui)(shui)(shui)泵(beng)轉速加快，供水(shui)(shui)(shui)(shui)量(liang)(liang)(liang)相(xiang)應增(zeng)大;用(yong)水(shui)(shui)(shui)(shui)量(liang)(liang)(liang)減(jian)(jian)少(shao)(shao)時(shi)(shi)，頻率(lv)降低，水(shui)(shui)(shui)(shui)泵(beng)轉速減(jian)(jian)慢，供水(shui)(shui)(shui)(shui)量(liang)(liang)(liang)亦相(xiang)應減(jian)(jian)小，這樣就保證了供水(shui)(shui)(shui)(shui)效率(lv)用(yong)戶(hu)(hu)對水(shui)(shui)(shui)(shui)壓(ya)和(he)水(shui)(shui)(shui)(shui)量(liang)(liang)(liang)的(de)(de)(de)要求，同時(shi)(shi)達(da)到了提高(gao)供水(shui)(shui)(shui)(shui)品質和(he)供水(shui)(shui)(shui)(shui)效率(lv)的(de)(de)(de)目的(de)(de)(de)，“用(yong)多少(shao)(shao)水(shui)(shui)(shui)(shui)，供多少(shao)(shao)水(shui)(shui)(shui)(shui)”；采(cai)用(yong)該設備不需建(jian)造高(gao)位水(shui)(shui)(shui)(shui)箱、水(shui)(shui)(shui)(shui)塔，水(shui)(shui)(shui)(shui)質無二次污染，是一種理想的(de)(de)(de)現(xian)代化(hua)建(jian)筑供水(shui)(shui)(shui)(shui)設備。
傳統供(gong)(gong)水(shui)(shui)(shui)通常會(hui)在(zai)樓(lou)頂(ding)固定(ding)一(yi)(yi)個(ge)高(gao)位水(shui)(shui)(shui)箱(xiang)，通過水(shui)(shui)(shui)箱(xiang)的(de)高(gao)度(du)給水(shui)(shui)(shui)提(ti)供(gong)(gong)一(yi)(yi)定(ding)壓力，再供(gong)(gong)給用(yong)戶使(shi)用(yong)。但這種(zhong)方(fang)案明顯非常落(luo)后，不僅投資大(da)而且不利于房屋(wu)的(de)維護和(he)抗震(zhen)。上個(ge)世紀80年代(dai)后，氣壓供(gong)(gong)水(shui)(shui)(shui)逐漸替代(dai)了(le)高(gao)位水(shui)(shui)(shui)箱(xiang)供(gong)(gong)水(shui)(shui)(shui)。但這種(zhong)供(gong)(gong)水(shui)(shui)(shui)方(fang)式依舊(jiu)存在(zai)很多缺陷(xian)。
氣(qi)(qi)壓供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)所需要的(de)(de)設備的(de)(de)主要部件是壓容器，其(qi)成本高，耗(hao)鋼(gang)量大(da)，結構復雜，而(er)且水(shui)(shui)(shui)(shui)(shui)泵(beng)功率較大(da)，反復啟動，不僅影響電(dian)網(wang)，耗(hao)費(fei)電(dian)力資源，而(er)且嚴重縮短(duan)了水(shui)(shui)(shui)(shui)(shui)泵(beng)和電(dian)磁(ci)設備壽(shou)命(ming)。尤其(qi)是氣(qi)(qi)壓供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)壓變化較大(da)，縮短(duan)了水(shui)(shui)(shui)(shui)(shui)網(wang)，閥門，水(shui)(shui)(shui)(shui)(shui)表的(de)(de)使用(yong)壽(shou)命(ming)。而(er)水(shui)(shui)(shui)(shui)(shui)壓過(guo)(guo)高會導(dao)致水(shui)(shui)(shui)(shui)(shui)管爆裂，造成水(shui)(shui)(shui)(shui)(shui)資源的(de)(de)大(da)量流失(shi)。而(er)水(shui)(shui)(shui)(shui)(shui)壓過(guo)(guo)低(di)，則會造成用(yong)戶供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)不足(zu)或(huo)無法供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)。對(dui)(dui)于(yu)工(gong)業生(sheng)(sheng)產和特殊用(yong)途的(de)(de)供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)而(er)言，供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)就更顯得異常重要，例如(ru)在(zai)工(gong)業生(sheng)(sheng)產中如(ru)突然供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)不足(zu)或(huo)斷水(shui)(shui)(shui)(shui)(shui)，就可能會對(dui)(dui)產品的(de)(de)安(an)全衛生(sheng)(sheng)產生(sheng)(sheng)某些不良(liang)影響。而(er)對(dui)(dui)于(yu)滅(mie)火水(shui)(shui)(shui)(shui)(shui)源來講(jiang)，供(gong)(gong)(gong)水(shui)(shui)(shui)(shui)(shui)不足(zu)則更加致命(ming)，對(dui)(dui)人民(min)的(de)(de)生(sheng)(sheng)命(ming)財(cai)產安(an)全造成極大(da)隱患。
變頻恒壓供水系統的優勢
1、與傳統供水方式相比變頻恒壓供水高效節能，能節能約30%-60%。
2、占地面(mian)積小、投入(ru)少、效率高(gao)。
3、配置靈活(huo)、自動化(hua)程度(du)高、功能齊全、靈活(huo)可靠。
4、運(yun)行合(he)理，由(you)于(yu)一天內的平均轉速下降，軸上的平均扭(niu)矩和(he)磨損減(jian)少，水泵的壽命將大為提高。
5、由(you)于能(neng)對(dui)水泵實現軟停(ting)和軟起，并可消除水錘效應(ying)（水錘效應(ying)：直(zhi)接起動(dong)和停(ting)機時，液體動(dong)能(neng)的急劇變大(da)，導致(zhi)對(dui)管網(wang)的極(ji)大(da)沖擊，有(you)很大(da)破壞力）。
6、變頻恒壓供水系統是一套全自動全封閉供水(shui)設備(bei)，無污染，水(shui)質符合(he)飲用水(shui)標準。
