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　　用(yong)于(yu)供暖、空調(diao)冷熱水(shui)(shui)循(xun)(xun)環系(xi)統(tong)(tong)的(de)(de)穩(wen)(wen)壓(ya)(ya)補充給(gei)水(shui)(shui)裝置，由膨(peng)脹(zhang)罐(guan)罐(guan)體、氣(qi)(qi)囊、氮氣(qi)(qi)、入(ru)水(shui)(shui)口組(zu)成的(de)(de)密(mi)(mi)閉式(shi)容器；它(ta)運用(yong)于(yu)供暖及空調(diao)水(shui)(shui)密(mi)(mi)閉系(xi)統(tong)(tong)中(zhong)吸收加熱時(shi)(shi)膨(peng)脹(zhang)的(de)(de)水(shui)(shui)量，平衡系(xi)統(tong)(tong)水(shui)(shui)量及壓(ya)(ya)力(li)；系(xi)統(tong)(tong)冷卻時(shi)(shi)，預(yu)充氮氣(qi)(qi)的(de)(de)壓(ya)(ya)力(li)將隔膜推到底部，系(xi)統(tong)(tong)水(shui)(shui)未進(jin)入(ru)膨(peng)脹(zhang)水(shui)(shui)罐(guan)，當系(xi)統(tong)(tong)水(shui)(shui)溫升高(gao)時(shi)(shi)，壓(ya)(ya)力(li)增大，水(shui)(shui)壓(ya)(ya)高(gao)于(yu)預(yu)充氮氣(qi)(qi)壓(ya)(ya)力(li)，加熱膨(peng)脹(zhang)的(de)(de)水(shui)(shui)量進(jin)入(ru)膨(peng)脹(zhang)罐(guan)。膨(peng)脹(zhang)罐(guan)用(yong)于(yu)閉式(shi)水(shui)(shui)循(xun)(xun)環系(xi)統(tong)(tong)中(zhong)，起到了平衡水(shui)(shui)量及壓(ya)(ya)力(li)的(de)(de)作用(yong)，避免安(an)(an)全閥(fa)(fa)頻(pin)繁開啟和自(zi)動補水(shui)(shui)閥(fa)(fa)頻(pin)繁補水(shui)(shui)。 氮氣(qi)(qi)定壓(ya)(ya)補水(shui)(shui)除氧閉式(shi)循(xun)(xun)環系(xi)統(tong)(tong)，膨(peng)脹(zhang)罐(guan)起到容納(na)(na)膨(peng)脹(zhang)水(shui)(shui)的(de)(de)作用(yong)外，還能(neng)起到補水(shui)(shui)箱的(de)(de)作用(yong)，膨(peng)脹(zhang)罐(guan)充入(ru)氮氣(qi)(qi)，能(neng)夠獲得較大容積(ji)來容納(na)(na)膨(peng)脹(zhang)水(shui)(shui)量，高(gao)、低壓(ya)(ya)膨(peng)脹(zhang)罐(guan)可利用(yong)本(ben)身壓(ya)(ya)力(li)并聯(lian)向穩(wen)(wen)壓(ya)(ya)系(xi)統(tong)(tong)補水(shui)(shui)。本(ben)裝置各點控(kong)制均為聯(lian)鎖反(fan)應，自(zi)動運行，壓(ya)(ya)力(li)波動范圍小，安(an)(an)全可靠，節能(neng)，經濟效果好。