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  電(dian)(dian)(dian)(dian)(dian)伴熱(re)(re)帶是由(you)電(dian)(dian)(dian)(dian)(dian)能轉化為熱(re)(re)能對管(guan)(guan)道(dao)介(jie)質(zhi)進(jin)行熱(re)(re)補償的一(yi)(yi)種保溫(wen)產(chan)品(pin)。應(ying)用(yong)區(qu)域(yu)十分(fen)(fen)廣泛，如電(dian)(dian)(dian)(dian)(dian)廠、化工、石(shi)油、消防(fang)、天然氣、建(jian)筑及(ji)民用(yong)太陽能管(guan)(guan)道(dao)等(deng)，電(dian)(dian)(dian)(dian)(dian)伴熱(re)(re)帶作用(yong)防(fang)凍保溫(wen)，可分(fen)(fen)為自限溫(wen)電(dian)(dian)(dian)(dian)(dian)伴熱(re)(re)帶、恒功率電(dian)(dian)(dian)(dian)(dian)伴熱(re)(re)帶、MI加熱(re)(re)電(dian)(dian)(dian)(dian)(dian)纜和發(fa)熱(re)(re)電(dian)(dian)(dian)(dian)(dian)纜等(deng)四(si)大類型，每一(yi)(yi)種電(dian)(dian)(dian)(dian)(dian)伴熱(re)(re)帶都有(you)不(bu)(bu)同的功能和不(bu)(bu)同的用(yong)途，其發(fa)熱(re)(re)原理也(ye)是不(bu)(bu)同的，那么其中自限溫(wen)電(dian)(dian)(dian)(dian)(dian)伴熱(re)(re)帶的發(fa)熱(re)(re)原理是怎么樣(yang)的呢?

  自(zi)限(xian)(xian)(xian)溫(wen)電伴(ban)(ban)熱(re)帶是(shi)(shi)利用(yong)PTC發熱(re)元件(jian)將電能(neng)轉化為(wei)熱(re)能(neng)，正(zheng)溫(wen)度(du)(du)(du)系數的工作原理(li)使得(de)這(zhe)種電伴(ban)(ban)熱(re)可以(yi)隨著溫(wen)度(du)(du)(du)的變化而自(zi)我調節功率大小(xiao)。從(cong)外觀上可以(yi)看到(dao)自(zi)限(xian)(xian)(xian)溫(wen)電伴(ban)(ban)熱(re)帶真正(zheng)的技術PTC是(shi)(shi)平行母線之間(jian)的黑色導(dao)(dao)電塑料層(ceng)，兩根母線只(zhi)是(shi)(shi)起到(dao)一個導(dao)(dao)電的作用(yong)。這(zhe)樣的特點就(jiu)決定了自(zi)限(xian)(xian)(xian)溫(wen)電伴(ban)(ban)熱(re)帶安(an)裝可以(yi)進行重(zhong)疊(die)交叉，并不會因為(wei)溫(wen)度(du)(du)(du)過高而燒毀。

  在發(fa)(fa)熱(re)(re)應用方面自(zi)(zi)限溫電(dian)伴(ban)熱(re)(re)帶(dai)(dai)比(bi)其它電(dian)熱(re)(re)產品要節能，有自(zi)(zi)動(dong)(dong)調節功(gong)能，能隨被伴(ban)熱(re)(re)介質的溫度變化自(zi)(zi)動(dong)(dong)調節輸出功(gong)率(lv)，而(er)恒(heng)功(gong)率(lv)電(dian)伴(ban)熱(re)(re)帶(dai)(dai)、MI加熱(re)(re)電(dian)纜及發(fa)(fa)熱(re)(re)電(dian)纜等產品是(shi)采用發(fa)(fa)熱(re)(re)絲來將電(dian)能轉化為(wei)熱(re)(re)能，無法自(zi)(zi)我調節溫度，必(bi)須使(shi)用溫控(kong)器來對其進(jin)行主(zhu)動(dong)(dong)限溫，這也確定了安(an)裝過程中需要考慮安(an)全間(jian)距并且不能交叉重疊(die)安(an)裝。