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  電(dian)(dian)伴(ban)熱(re)(re)帶是由電(dian)(dian)能(neng)轉化(hua)為熱(re)(re)能(neng)對管(guan)道介質進行(xing)熱(re)(re)補償(chang)的(de)一種保(bao)(bao)溫產品。應(ying)用(yong)區域十(shi)分廣泛，如電(dian)(dian)廠、化(hua)工、石油、消防、天然(ran)氣、建筑(zhu)及民(min)用(yong)太陽能(neng)管(guan)道等，電(dian)(dian)伴(ban)熱(re)(re)帶作用(yong)防凍(dong)保(bao)(bao)溫，可分為自限溫電(dian)(dian)伴(ban)熱(re)(re)帶、恒功率電(dian)(dian)伴(ban)熱(re)(re)帶、MI加熱(re)(re)電(dian)(dian)纜和發(fa)熱(re)(re)電(dian)(dian)纜等四大類型，每一種電(dian)(dian)伴(ban)熱(re)(re)帶都有不同的(de)功能(neng)和不同的(de)用(yong)途，其發(fa)熱(re)(re)原理也是不同的(de)，那么其中自限溫電(dian)(dian)伴(ban)熱(re)(re)帶的(de)發(fa)熱(re)(re)原理是怎么樣的(de)呢?

  自(zi)(zi)限(xian)溫(wen)(wen)電(dian)(dian)伴熱(re)(re)帶是利用PTC發熱(re)(re)元(yuan)件將電(dian)(dian)能(neng)(neng)轉(zhuan)化(hua)為熱(re)(re)能(neng)(neng)，正溫(wen)(wen)度系(xi)數的(de)工作原(yuan)理使得(de)這種(zhong)電(dian)(dian)伴熱(re)(re)可(ke)以(yi)(yi)隨(sui)著溫(wen)(wen)度的(de)變化(hua)而自(zi)(zi)我調節(jie)功(gong)率(lv)大小。從外(wai)觀(guan)上(shang)可(ke)以(yi)(yi)看到自(zi)(zi)限(xian)溫(wen)(wen)電(dian)(dian)伴熱(re)(re)帶真(zhen)正的(de)技(ji)術PTC是平行母(mu)線之(zhi)間(jian)的(de)黑色導電(dian)(dian)塑料(liao)層，兩根母(mu)線只是起(qi)到一個導電(dian)(dian)的(de)作用。這樣的(de)特(te)點就(jiu)決定(ding)了(le)自(zi)(zi)限(xian)溫(wen)(wen)電(dian)(dian)伴熱(re)(re)帶安裝(zhuang)可(ke)以(yi)(yi)進行重疊交叉，并不(bu)會因為溫(wen)(wen)度過高而燒毀。

  在發熱(re)(re)(re)應用(yong)方面自限(xian)溫電(dian)伴(ban)熱(re)(re)(re)帶(dai)比其(qi)(qi)它(ta)電(dian)熱(re)(re)(re)產品要(yao)節能(neng)，有自動調(diao)節功能(neng)，能(neng)隨被伴(ban)熱(re)(re)(re)介質的(de)溫度(du)變化(hua)自動調(diao)節輸出功率，而恒功率電(dian)伴(ban)熱(re)(re)(re)帶(dai)、MI加熱(re)(re)(re)電(dian)纜及發熱(re)(re)(re)電(dian)纜等產品是采(cai)用(yong)發熱(re)(re)(re)絲來將電(dian)能(neng)轉化(hua)為熱(re)(re)(re)能(neng)，無(wu)法自我(wo)調(diao)節溫度(du)，必須使(shi)用(yong)溫控(kong)器來對其(qi)(qi)進行主動限(xian)溫，這也確定了(le)安裝過程中需要(yao)考(kao)慮(lv)安全間距并且不(bu)能(neng)交(jiao)叉重疊安裝。