一、電熱管工作原理是什么

電熱管原理：利用電熱(re)管內部(bu)的電阻絲來(lai)加熱(re)的。

電(dian)熱(re)(re)管(guan)是一種消耗(hao)電(dian)能(neng)轉(zhuan)換為熱(re)(re)能(neng)，來對需加熱(re)(re)物料進(jin)行加熱(re)(re)。在工作中低溫(wen)流(liu)體介質(zhi)(zhi)通過(guo)管(guan)道(dao)在壓力作用下進(jin)入(ru)(ru)其輸入(ru)(ru)口，沿著電(dian)加熱(re)(re)容器內部特定換熱(re)(re)流(liu)道(dao)，運(yun)用流(liu)體熱(re)(re)力學原(yuan)理(li)設計的路徑，帶走電(dian)熱(re)(re)元(yuan)件工作中所產生(sheng)的高溫(wen)熱(re)(re)能(neng)量(liang)，使被加熱(re)(re)介質(zhi)(zhi)溫(wen)度(du)升(sheng)高，電(dian)熱(re)(re)管(guan)出(chu)口得(de)到工藝(yi)要求的高溫(wen)介質(zhi)(zhi)。

此外，電熱管還可以利用感應加熱或電弧加熱的方式工作。感應加熱通過產生交變電場或磁場來激化被加熱物體，使其產生高變運動或渦流，從而產生熱量。電弧加熱則通過在兩電極之間產生電弧，將電能直接轉化為熱能。電熱管的結構通常包括一個加熱線圈和一個由絕緣材料包裹的保護管，當電流通過加熱線圈時，線圈受熱膨脹，導致保護管內的加熱液體被加熱，從而產生熱傳導效應。電熱管是一種常見的加熱元件，應用范圍是非常廣泛的，那么就了解一下電熱管十大品牌吧。

二、電熱管好壞怎么判斷

電熱管質量好(hao)壞主(zhu)要取決于電氣強度、絕緣、泄漏電流、功率(lv)準確性、壽命、耐腐蝕性、尺寸等。具體如下：

1、電氣強度：影(ying)響(xiang)電(dian)熱(re)管電(dian)氣強度(du)的(de)因素(su)主(zhu)要(yao)包(bao)括(kuo)絕緣層的(de)厚(hou)度(du)、絕緣層的(de)原料(liao)質量、電(dian)熱(re)管的(de)長(chang)度(du)、彎曲(qu)的(de)半(ban)徑及彎曲(qu)的(de)個(ge)數(shu)。

2、絕緣：影響電(dian)熱(re)管(guan)絕緣的(de)主要是電(dian)熱(re)管(guan)的(de)封口工藝。

3、泄露電流：主要(yao)與電(dian)(dian)熱(re)管使用(yong)時的溫度、電(dian)(dian)熱(re)管的使用(yong)電(dian)(dian)壓、電(dian)(dian)熱(re)管的發熱(re)長度有關。是對于高溫電(dian)(dian)熱(re)管的一個重要(yao)考核指標。

4、功率準確性：主要(yao)與電阻絲的(de)質(zhi)量(liang)、制造廠的(de)工(gong)藝水(shui)平有關。電熱管在批量(liang)生產(chan)前都(dou)需要(yao)做溫度系數的(de)試驗(yan)，以(yi)確定(ding)合格的(de)功率范圍的(de)冷(leng)態電阻。

5、壽命：電(dian)(dian)熱管的(de)壽命除了與(yu)電(dian)(dian)阻(zu)絲(si)質(zhi)量有(you)關(guan)外(wai)，還與(yu)氧化鎂粉的(de)質(zhi)量、電(dian)(dian)阻(zu)絲(si)直(zhi)徑(jing)(jing)的(de)選擇等(deng)因素有(you)關(guan)。在選擇電(dian)(dian)阻(zu)絲(si)的(de)直(zhi)徑(jing)(jing)時，需(xu)計算電(dian)(dian)阻(zu)絲(si)的(de)表(biao)面負(fu)荷以達到(dao)壽命要求(qiu)。

三、電熱管接線方法

電熱管(guan)的接線方式在(zai)加熱管(guan)上常用的有兩(liang)種(zhong)(zhong)方法(fa)，一種(zhong)(zhong)是三(san)角形接法(fa)，另一種(zhong)(zhong)是星形接法(fa)。具體方法(fa)如下：

1、三角形接法

三角形接法：電加(jia)熱管每個(ge)元(yuan)件的(de)(de)首端接另(ling)一(yi)個(ge)元(yuan)件的(de)(de)尾端，三個(ge)接點分別接三根相線的(de)(de)接線方式；

三角形接法的特點：三個(ge)電(dian)(dian)加(jia)熱管(guan)元(yuan)件額(e)定電(dian)(dian)壓為380V；如三個(ge)元(yuan)件電(dian)(dian)阻(zu)值不同(tong)，也不影響這種(zhong)接(jie)法(fa)的可(ke)行(xing)性。三角形接(jie)法(fa)比(bi)星(xing)形接(jie)法(fa)功(gong)率和電(dian)(dian)流都三倍(bei)。

2、星形接法

星形接法：三(san)個(ge)(ge)電熱管的加熱元件，每個(ge)(ge)元件的首(shou)端連在一起（這(zhe)個(ge)(ge)點(dian)稱(cheng)中(zhong)性點(dian)），三(san)個(ge)(ge)尾端分別接三(san)根相線的接線方式。三(san)個(ge)(ge)元件額定(ding)電壓(ya)為(wei)220V時；如果三(san)個(ge)(ge)元件電阻值(zhi)不同，則中(zhong)性點(dian)應該(gai)接零線。

四、電熱管怎樣分220v和380v

電(dian)熱管的電(dian)壓(ya)分220V和(he)380V主要(yao)是通過其電(dian)阻值(zhi)和(he)接線方式(shi)來判斷(duan)。以下是兩種(zhong)電(dian)壓(ya)類型的介紹：

1、電阻值：電熱(re)管(guan)的(de)(de)電阻(zu)值決定(ding)了其使(shi)用的(de)(de)電壓等級(ji)，通常情(qing)況下，電阻(zu)值是220V的(de)(de)平方(fang)或380V的(de)(de)平方(fang)，這可(ke)以通過測量電阻(zu)值來確定(ding)。

2、接線方式：電(dian)(dian)(dian)(dian)(dian)(dian)熱管(guan)(guan)的(de)(de)接(jie)(jie)線(xian)方式也是判斷其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)類型(xing)(xing)的(de)(de)重要依據，一根額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)為220V的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)熱管(guan)(guan)，當單獨使(shi)用(yong)(yong)(yong)時(shi)(shi)，其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)應(ying)為220V；若三(san)根電(dian)(dian)(dian)(dian)(dian)(dian)熱管(guan)(guan)一起使(shi)用(yong)(yong)(yong)，可以采(cai)(cai)用(yong)(yong)(yong)并聯接(jie)(jie)線(xian)接(jie)(jie)220V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，或者采(cai)(cai)用(yong)(yong)(yong)星型(xing)(xing)（Y型(xing)(xing)）接(jie)(jie)線(xian)法接(jie)(jie)380V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。同樣，一根額定(ding)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)為380V的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)熱管(guan)(guan)，當單獨使(shi)用(yong)(yong)(yong)時(shi)(shi)，其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)應(ying)為380V；若三(san)根電(dian)(dian)(dian)(dian)(dian)(dian)熱管(guan)(guan)一起使(shi)用(yong)(yong)(yong)，可以采(cai)(cai)用(yong)(yong)(yong)并聯接(jie)(jie)線(xian)接(jie)(jie)380V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，或者采(cai)(cai)用(yong)(yong)(yong)三(san)角型(xing)(xing)（△型(xing)(xing)）接(jie)(jie)線(xian)法接(jie)(jie)380V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。

此外(wai)，電(dian)(dian)(dian)熱(re)管的(de)電(dian)(dian)(dian)阻(zu)絲的(de)粗細也會影響其使用的(de)電(dian)(dian)(dian)壓(ya)(ya)等(deng)級，電(dian)(dian)(dian)壓(ya)(ya)越(yue)小，電(dian)(dian)(dian)阻(zu)絲越(yue)粗。在(zai)實際應(ying)用中，電(dian)(dian)(dian)熱(re)管的(de)電(dian)(dian)(dian)壓(ya)(ya)類型通(tong)常會在(zai)其外(wai)殼上標明，如果(guo)無法(fa)辨認，可以通(tong)過測量電(dian)(dian)(dian)流和計算功率的(de)方式來(lai)初(chu)步(bu)判斷(duan)，或者通(tong)過實際加熱(re)效果(guo)來(lai)判斷(duan)。