U型電熱管的組成
U型電熱管典型(xing)結構(大眾化的結構)一般由5個部分組成:絕緣子、封口材料、引出棒、填充料、電熱絲、金屬(shu)護(hu)套管(guan)、接(jie)線端。
螺旋(xuan)電(dian)(dian)熱(re)(re)(re)絲(si)與(yu)引出棒(bang)位(wei)于金屬護套管(guan)(guan)(guan)的(de)中央,它的(de)制造工(gong)藝是將(jiang)螺旋(xuan)型電(dian)(dian)熱(re)(re)(re)絲(si)穿(chuan)入(ru)無縫鋼管(guan)(guan)(guan)、銅管(guan)(guan)(guan)或(huo)者鋁(lv)管(guan)(guan)(guan)內,其間隙處通過多管(guan)(guan)(guan)填充(chong)機均勻(yun)地填充(chong)既絕緣又導熱(re)(re)(re)的(de)氧(yang)化介質,如(ru)結晶(jing)氧(yang)化鎂(mei)粉(也(ye)可用(yong)(yong)氧(yang)化鋁(lv)或(huo)潔(jie)凈(jing)石英(ying)砂等)。然后用(yong)(yong)縮管(guan)(guan)(guan)機將(jiang)管(guan)(guan)(guan)徑縮細,使氧(yang)化物(wu)介質密實(密度(du)達到3.3g/cm3以(yi)上(shang)),保證(zheng)電(dian)(dian)熱(re)(re)(re)絲(si)與(yu)空氣隔絕,中心位(wei)置不發(fa)生偏(pian)移(yi)而碰及管(guan)(guan)(guan)壁(bi)。這(zhe)樣。單(dan)位(wei)面積發(fa)熱(re)(re)(re)量就可增加十幾倍。使用(yong)(yong)壽命也(ye)可以(yi)相應(ying)的(de)提(ti)高至10年以(yi)上(shang)。與(yu)相同大熱(re)(re)(re)量的(de)電(dian)(dian)熱(re)(re)(re)元件相比,管(guan)(guan)(guan)狀(zhuang)電(dian)(dian)熱(re)(re)(re)管(guan)(guan)(guan)可節(jie)約5%的(de)電(dian)(dian)熱(re)(re)(re)材料(liao),而熱(re)(re)(re)效(xiao)率可達到90%以(yi)上(shang)。
因(yin)此,從U型電熱管的結(jie)構來看(kan),金屬管狀電(dian)(dian)熱管是目前使(shi)(shi)用(yong)廣(guang)泛,結(jie)構簡單,性(xing)能可(ke)靠,使(shi)(shi)用(yong)壽命長(chang)的密封式電(dian)(dian)熱元(yuan)件(jian),可(ke)成功的運用(yong)于工(gong)業、家用(yong)電(dian)(dian)器上,使(shi)(shi)用(yong)越來越廣(guang)泛。希望更多的使(shi)(shi)用(yong)者對電(dian)(dian)熱管的結(jie)構原理有了(le)清楚的了(le)解。