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　　用(yong)(yong)(yong)于(yu)供暖、空(kong)調冷熱水(shui)(shui)(shui)循環系(xi)統的(de)(de)穩壓(ya)補(bu)充(chong)給水(shui)(shui)(shui)裝(zhuang)置(zhi)，由膨(peng)(peng)脹(zhang)(zhang)罐罐體(ti)、氣(qi)囊(nang)、氮氣(qi)、入(ru)(ru)水(shui)(shui)(shui)口組成的(de)(de)密閉(bi)式容(rong)器；它(ta)運(yun)用(yong)(yong)(yong)于(yu)供暖及(ji)空(kong)調水(shui)(shui)(shui)密閉(bi)系(xi)統中吸收加熱時(shi)膨(peng)(peng)脹(zhang)(zhang)的(de)(de)水(shui)(shui)(shui)量(liang)(liang)(liang)，平衡系(xi)統水(shui)(shui)(shui)量(liang)(liang)(liang)及(ji)壓(ya)力(li)；系(xi)統冷卻時(shi)，預充(chong)氮氣(qi)的(de)(de)壓(ya)力(li)將隔膜推(tui)到底(di)部，系(xi)統水(shui)(shui)(shui)未進入(ru)(ru)膨(peng)(peng)脹(zhang)(zhang)水(shui)(shui)(shui)罐，當(dang)系(xi)統水(shui)(shui)(shui)溫升高時(shi)，壓(ya)力(li)增(zeng)大(da)，水(shui)(shui)(shui)壓(ya)高于(yu)預充(chong)氮氣(qi)壓(ya)力(li)，加熱膨(peng)(peng)脹(zhang)(zhang)的(de)(de)水(shui)(shui)(shui)量(liang)(liang)(liang)進入(ru)(ru)膨(peng)(peng)脹(zhang)(zhang)罐。膨(peng)(peng)脹(zhang)(zhang)罐用(yong)(yong)(yong)于(yu)閉(bi)式水(shui)(shui)(shui)循環系(xi)統中，起到了(le)平衡水(shui)(shui)(shui)量(liang)(liang)(liang)及(ji)壓(ya)力(li)的(de)(de)作(zuo)用(yong)(yong)(yong)，避免(mian)安(an)(an)全(quan)閥頻繁開啟(qi)和自動(dong)(dong)補(bu)水(shui)(shui)(shui)閥頻繁補(bu)水(shui)(shui)(shui)。 氮氣(qi)定(ding)壓(ya)補(bu)水(shui)(shui)(shui)除氧閉(bi)式循環系(xi)統，膨(peng)(peng)脹(zhang)(zhang)罐起到容(rong)納膨(peng)(peng)脹(zhang)(zhang)水(shui)(shui)(shui)的(de)(de)作(zuo)用(yong)(yong)(yong)外，還能起到補(bu)水(shui)(shui)(shui)箱的(de)(de)作(zuo)用(yong)(yong)(yong)，膨(peng)(peng)脹(zhang)(zhang)罐充(chong)入(ru)(ru)氮氣(qi)，能夠(gou)獲得較(jiao)大(da)容(rong)積來容(rong)納膨(peng)(peng)脹(zhang)(zhang)水(shui)(shui)(shui)量(liang)(liang)(liang)，高、低(di)壓(ya)膨(peng)(peng)脹(zhang)(zhang)罐可(ke)利用(yong)(yong)(yong)本身壓(ya)力(li)并聯向穩壓(ya)系(xi)統補(bu)水(shui)(shui)(shui)。本裝(zhuang)置(zhi)各點控制均為(wei)聯鎖(suo)反應，自動(dong)(dong)運(yun)行，壓(ya)力(li)波動(dong)(dong)范圍小，安(an)(an)全(quan)可(ke)靠，節能，經濟效果好(hao)。