自控溫電熱帶和恒功率電熱帶的區別

   自控溫電(dian)(dian)(dian)(dian)(dian)(dian)伴(ban)(ban)(ban)熱(re)方案主(zhu)要通過自控溫電(dian)(dian)(dian)(dian)(dian)(dian)伴(ban)(ban)(ban)熱(re)線(xian)(xian)完(wan)成(cheng)。自控溫電(dian)(dian)(dian)(dian)(dian)(dian)伴(ban)(ban)(ban)熱(re)線(xian)(xian)由導電(dian)(dian)(dian)(dian)(dian)(dian)塑(su)(su)(su)料和2根(gen)平行(xing)母線(xian)(xian)加絕(jue)緣層(ceng)、金屬屏蔽網(wang)、防腐外(wai)套構成(cheng)。其(qi)中(zhong)由塑(su)(su)(su)料加導電(dian)(dian)(dian)(dian)(dian)(dian)碳(tan)粒(li)(li)經特殊(shu)加工而成(cheng)的導電(dian)(dian)(dian)(dian)(dian)(dian)塑(su)(su)(su)料是發(fa)熱(re)核(he)心。當伴(ban)(ban)(ban)熱(re)線(xian)(xian)周圍(wei)溫度較(jiao)(jiao)低(di)時(shi)，導電(dian)(dian)(dian)(dian)(dian)(dian)塑(su)(su)(su)料產生微分(fen)子收縮(suo)，碳(tan)粒(li)(li)連接形成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)使電(dian)(dian)(dian)(dian)(dian)(dian)流通過，伴(ban)(ban)(ban)熱(re)線(xian)(xian)便開始發(fa)熱(re)；而溫度較(jiao)(jiao)高時(shi)，導電(dian)(dian)(dian)(dian)(dian)(dian)塑(su)(su)(su)料產生微分(fen)子膨脹，碳(tan)粒(li)(li)逐漸分(fen)開，導致電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)斷(duan)，電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)上升，伴(ban)(ban)(ban)熱(re)線(xian)(xian)自動減少功率(lv)輸出，發(fa)熱(re)量(liang)便降低(di)。當周圍(wei)溫度變冷時(shi)，塑(su)(su)(su)料又恢(hui)復到微分(fen)子收縮(suo)狀態，碳(tan)粒(li)(li)相應(ying)連接起來(lai)形成(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，伴(ban)(ban)(ban)熱(re)線(xian)(xian)發(fa)熱(re)功率(lv)又自動上升，這就是我們常說的電(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)正(zheng)溫度系數（PTC）特性。其(qi)整個溫度控制(zhi)過程是由材(cai)料本身自動調節(jie)完(wan)成(cheng)的，其(qi)控制(zhi)溫度不(bu)會(hui)過高也不(bu)會(hui)過低(di)。

  恒功率電熱帶分(fen)為(wei)并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)式(shi)(shi)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)和(he)串聯(lian)(lian)(lian)(lian)式(shi)(shi)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)。 恒功率電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)由(you)(you)于其多個(ge)(ge)發(fa)熱(re)(re)(re)(re)(re)(re)節在整個(ge)(ge)長度并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)聯(lian)(lian)(lian)(lian)接(jie)(jie)，故簡稱為(wei)并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)式(shi)(shi)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)，它是由(you)(you)電(dian)(dian)(dian)(dian)源母線(xian)和(he)母線(xian)絕(jue)緣(yuan)、主絕(jue)緣(yuan)、發(fa)熱(re)(re)(re)(re)(re)(re)絲、外(wai)護(hu)套(tao)、金屬屏蔽網、加(jia)(jia)強護(hu)套(tao)構成(cheng)。恒功率并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)由(you)(you)于其多個(ge)(ge)發(fa)熱(re)(re)(re)(re)(re)(re)節在整個(ge)(ge)長度并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)聯(lian)(lian)(lian)(lian)接(jie)(jie)。電(dian)(dian)(dian)(dian)源母線(xian)為(wei)二根或三根平(ping)行絕(jue)緣(yuan)銅導線(xian)，并(bing)(bing)(bing)在其表面上纏繞電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)絲，并(bing)(bing)(bing)將(jiang)該電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)絲每隔(ge)一定(ding)距離（“即發(fa)熱(re)(re)(re)(re)(re)(re)節長”）與母線(xian)連(lian)(lian)接(jie)(jie)，形成(cheng)連(lian)(lian)續并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)電(dian)(dian)(dian)(dian)阻(zu)，母線(xian)通電(dian)(dian)(dian)(dian)后，各并(bing)(bing)(bing)聯(lian)(lian)(lian)(lian)電(dian)(dian)(dian)(dian)阻(zu)發(fa)熱(re)(re)(re)(re)(re)(re)，因而形成(cheng)一條(tiao)連(lian)(lian)續的(de)加(jia)(jia)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)，其發(fa)熱(re)(re)(re)(re)(re)(re)核心(xin)為(wei)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)絲。 恒功率串聯(lian)(lian)(lian)(lian)電(dian)(dian)(dian)(dian)熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)由(you)(you)電(dian)(dian)(dian)(dian)源母線(xian)、復合(he)絕(jue)緣(yuan)、外(wai)護(hu)套(tao)、銅編(bian)織(zhi)、加(jia)(jia)強層(ceng)構成(cheng)。根據(ju)焦耳定(ding)律可(ke)知(zhi)，電(dian)(dian)(dian)(dian)流通過(guo)導體不斷的(de)放出能量，形成(cheng)一條(tiao)連(lian)(lian)續的(de)、發(fa)熱(re)(re)(re)(re)(re)(re)均勻的(de)電(dian)(dian)(dian)(dian)伴熱(re)(re)(re)(re)(re)(re)帶(dai)(dai)(dai)(dai)。其發(fa)熱(re)(re)(re)(re)(re)(re)核心(xin)就是母線(xian)。