自控溫電熱帶和恒功率電熱帶的區別

   自控(kong)(kong)(kong)(kong)溫電(dian)(dian)(dian)(dian)伴(ban)(ban)熱方(fang)案主要通過(guo)自控(kong)(kong)(kong)(kong)溫電(dian)(dian)(dian)(dian)伴(ban)(ban)熱線(xian)(xian)(xian)完(wan)成(cheng)。自控(kong)(kong)(kong)(kong)溫電(dian)(dian)(dian)(dian)伴(ban)(ban)熱線(xian)(xian)(xian)由導(dao)電(dian)(dian)(dian)(dian)塑料(liao)(liao)和2根平行母線(xian)(xian)(xian)加絕(jue)緣層(ceng)、金屬(shu)屏蔽網、防(fang)腐外套構成(cheng)。其中由塑料(liao)(liao)加導(dao)電(dian)(dian)(dian)(dian)碳粒(li)(li)(li)經特殊加工而成(cheng)的導(dao)電(dian)(dian)(dian)(dian)塑料(liao)(liao)是發(fa)熱核心。當伴(ban)(ban)熱線(xian)(xian)(xian)周圍溫度(du)(du)較(jiao)低時(shi)，導(dao)電(dian)(dian)(dian)(dian)塑料(liao)(liao)產生(sheng)微分子(zi)收(shou)縮(suo)，碳粒(li)(li)(li)連(lian)接形成(cheng)電(dian)(dian)(dian)(dian)路使電(dian)(dian)(dian)(dian)流通過(guo)，伴(ban)(ban)熱線(xian)(xian)(xian)便(bian)開(kai)始(shi)發(fa)熱；而溫度(du)(du)較(jiao)高(gao)時(shi)，導(dao)電(dian)(dian)(dian)(dian)塑料(liao)(liao)產生(sheng)微分子(zi)膨脹(zhang)，碳粒(li)(li)(li)逐漸分開(kai)，導(dao)致電(dian)(dian)(dian)(dian)路中斷，電(dian)(dian)(dian)(dian)阻(zu)上升(sheng)，伴(ban)(ban)熱線(xian)(xian)(xian)自動減少功率輸出，發(fa)熱量便(bian)降低。當周圍溫度(du)(du)變冷(leng)時(shi)，塑料(liao)(liao)又恢復(fu)到微分子(zi)收(shou)縮(suo)狀態，碳粒(li)(li)(li)相應連(lian)接起來形成(cheng)電(dian)(dian)(dian)(dian)路，伴(ban)(ban)熱線(xian)(xian)(xian)發(fa)熱功率又自動上升(sheng)，這就是我(wo)們常說的電(dian)(dian)(dian)(dian)阻(zu)正(zheng)溫度(du)(du)系數（PTC）特性。其整個溫度(du)(du)控(kong)(kong)(kong)(kong)制(zhi)(zhi)過(guo)程是由材料(liao)(liao)本身自動調節完(wan)成(cheng)的，其控(kong)(kong)(kong)(kong)制(zhi)(zhi)溫度(du)(du)不會過(guo)高(gao)也不會過(guo)低。

  恒功率電熱帶分為并聯(lian)(lian)式(shi)電(dian)(dian)(dian)熱(re)(re)(re)帶(dai)和串聯(lian)(lian)式(shi)電(dian)(dian)(dian)熱(re)(re)(re)帶(dai)。 恒功率電(dian)(dian)(dian)熱(re)(re)(re)帶(dai)由(you)于(yu)其多(duo)(duo)個(ge)發(fa)熱(re)(re)(re)節(jie)在(zai)整個(ge)長(chang)(chang)度并聯(lian)(lian)聯(lian)(lian)接，故簡稱為并聯(lian)(lian)式(shi)電(dian)(dian)(dian)熱(re)(re)(re)帶(dai)，它是由(you)電(dian)(dian)(dian)源母(mu)(mu)(mu)線(xian)和母(mu)(mu)(mu)線(xian)絕(jue)(jue)緣、主絕(jue)(jue)緣、發(fa)熱(re)(re)(re)絲、外(wai)護(hu)套、金屬(shu)屏(ping)蔽(bi)網、加強護(hu)套構成(cheng)(cheng)。恒功率并聯(lian)(lian)電(dian)(dian)(dian)熱(re)(re)(re)帶(dai)由(you)于(yu)其多(duo)(duo)個(ge)發(fa)熱(re)(re)(re)節(jie)在(zai)整個(ge)長(chang)(chang)度并聯(lian)(lian)聯(lian)(lian)接。電(dian)(dian)(dian)源母(mu)(mu)(mu)線(xian)為二根(gen)(gen)或三(san)根(gen)(gen)平行絕(jue)(jue)緣銅導線(xian)，并在(zai)其表(biao)面上纏繞電(dian)(dian)(dian)熱(re)(re)(re)絲，并將該(gai)電(dian)(dian)(dian)熱(re)(re)(re)絲每隔一定距離（“即發(fa)熱(re)(re)(re)節(jie)長(chang)(chang)”）與母(mu)(mu)(mu)線(xian)連(lian)(lian)(lian)接，形(xing)成(cheng)(cheng)連(lian)(lian)(lian)續并聯(lian)(lian)電(dian)(dian)(dian)阻，母(mu)(mu)(mu)線(xian)通電(dian)(dian)(dian)后，各并聯(lian)(lian)電(dian)(dian)(dian)阻發(fa)熱(re)(re)(re)，因而(er)形(xing)成(cheng)(cheng)一條連(lian)(lian)(lian)續的(de)加熱(re)(re)(re)帶(dai)，其發(fa)熱(re)(re)(re)核心(xin)為電(dian)(dian)(dian)熱(re)(re)(re)絲。 恒功率串聯(lian)(lian)電(dian)(dian)(dian)熱(re)(re)(re)帶(dai)由(you)電(dian)(dian)(dian)源母(mu)(mu)(mu)線(xian)、復合絕(jue)(jue)緣、外(wai)護(hu)套、銅編織、加強層構成(cheng)(cheng)。根(gen)(gen)據(ju)焦(jiao)耳定律可知，電(dian)(dian)(dian)流(liu)通過導體不(bu)斷的(de)放出能量，形(xing)成(cheng)(cheng)一條連(lian)(lian)(lian)續的(de)、發(fa)熱(re)(re)(re)均勻的(de)電(dian)(dian)(dian)伴熱(re)(re)(re)帶(dai)。其發(fa)熱(re)(re)(re)核心(xin)就是母(mu)(mu)(mu)線(xian)。