一、電熱管工作原理是什么
電熱管原理:利用電(dian)熱管內部的(de)電(dian)阻絲(si)來加(jia)熱的(de)。
電(dian)熱(re)(re)(re)(re)管是一種消耗電(dian)能轉(zhuan)換為熱(re)(re)(re)(re)能,來對需加(jia)熱(re)(re)(re)(re)物(wu)料進行加(jia)熱(re)(re)(re)(re)。在(zai)工(gong)作中(zhong)低溫(wen)流(liu)(liu)體(ti)介質(zhi)通過管道(dao)在(zai)壓(ya)力作用(yong)下進入其輸(shu)入口(kou),沿著電(dian)加(jia)熱(re)(re)(re)(re)容器內部特定換熱(re)(re)(re)(re)流(liu)(liu)道(dao),運用(yong)流(liu)(liu)體(ti)熱(re)(re)(re)(re)力學原理(li)設計(ji)的(de)路(lu)徑,帶走電(dian)熱(re)(re)(re)(re)元件工(gong)作中(zhong)所產生的(de)高溫(wen)熱(re)(re)(re)(re)能量,使(shi)被加(jia)熱(re)(re)(re)(re)介質(zhi)溫(wen)度升(sheng)高,電(dian)熱(re)(re)(re)(re)管出口(kou)得到工(gong)藝要求(qiu)的(de)高溫(wen)介質(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(dian)熱管質量好壞主要(yao)取決于電(dian)氣強度、絕緣(yuan)、泄漏電(dian)流、功率(lv)準確性、壽命、耐腐蝕性、尺寸等。具體如下(xia):
1、電氣強度:影響電(dian)熱管(guan)電(dian)氣強(qiang)度的(de)因素主要(yao)包括絕緣(yuan)層(ceng)的(de)厚度、絕緣(yuan)層(ceng)的(de)原料質量、電(dian)熱管(guan)的(de)長度、彎曲(qu)的(de)半(ban)徑及彎曲(qu)的(de)個數。
2、絕緣:影響電(dian)熱管(guan)絕緣的主要是電(dian)熱管(guan)的封口工藝。
3、泄露電流:主要與電(dian)熱(re)(re)(re)管(guan)使(shi)用時的溫(wen)度、電(dian)熱(re)(re)(re)管(guan)的使(shi)用電(dian)壓、電(dian)熱(re)(re)(re)管(guan)的發熱(re)(re)(re)長度有(you)關。是對于高溫(wen)電(dian)熱(re)(re)(re)管(guan)的一個重要考核指標。
4、功率準確性:主(zhu)要與(yu)電(dian)阻絲的(de)質量、制造(zao)廠的(de)工藝水平有關(guan)。電(dian)熱管在批量生產前(qian)都需(xu)要做(zuo)溫(wen)度(du)系(xi)數的(de)試驗,以(yi)確定合格(ge)的(de)功率范圍的(de)冷態電(dian)阻。
5、壽命:電(dian)熱管的(de)壽命(ming)除了與電(dian)阻絲(si)質量有關(guan)外,還與氧(yang)化鎂粉的(de)質量、電(dian)阻絲(si)直徑的(de)選擇等因素有關(guan)。在選擇電(dian)阻絲(si)的(de)直徑時,需計算電(dian)阻絲(si)的(de)表面負荷以達到壽命(ming)要求。
三、電熱管接線方法
電熱管(guan)的接(jie)線方(fang)式在加(jia)熱管(guan)上常用的有兩種方(fang)法(fa),一種是(shi)三角形(xing)接(jie)法(fa),另一種是(shi)星形(xing)接(jie)法(fa)。具體方(fang)法(fa)如下:
1、三角形接法
三角形接法:電加熱管每個(ge)元件的(de)首端(duan)接(jie)(jie)另一個(ge)元件的(de)尾(wei)端(duan),三(san)個(ge)接(jie)(jie)點分(fen)別接(jie)(jie)三(san)根相線(xian)的(de)接(jie)(jie)線(xian)方(fang)式;
三角形接法的特點:三(san)個電加熱管元件額定電壓為380V;如三(san)個元件電阻值不(bu)(bu)同(tong),也不(bu)(bu)影響這種(zhong)接法的可行性(xing)。三(san)角形(xing)接法比星(xing)形(xing)接法功率和電流都三(san)倍。
2、星形接法
星形接法:三個(ge)(ge)電熱(re)管的加熱(re)元(yuan)件(jian)(jian),每個(ge)(ge)元(yuan)件(jian)(jian)的首端連(lian)在一(yi)起(這(zhe)個(ge)(ge)點稱中性點),三個(ge)(ge)尾端分(fen)別接(jie)三根相線(xian)(xian)的接(jie)線(xian)(xian)方式(shi)。三個(ge)(ge)元(yuan)件(jian)(jian)額定電壓為220V時;如果三個(ge)(ge)元(yuan)件(jian)(jian)電阻值不同,則中性點應該(gai)接(jie)零(ling)線(xian)(xian)。
四、電熱管怎樣分220v和380v
電熱管的(de)電壓分220V和(he)380V主(zhu)要是(shi)通過其電阻值(zhi)和(he)接線方式來判斷。以(yi)下是(shi)兩種電壓類型(xing)的(de)介紹:
1、電阻值:電熱管的電阻(zu)值決定了其(qi)使用(yong)的電壓等級,通常情況下,電阻(zu)值是220V的平方(fang)或380V的平方(fang),這可以通過測量電阻(zu)值來確定。
2、接線方式:電(dian)(dian)(dian)(dian)(dian)(dian)熱(re)管(guan)的(de)接(jie)線方式也是判斷其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)類(lei)型的(de)重要依(yi)據,一(yi)根額定電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)為(wei)220V的(de)電(dian)(dian)(dian)(dian)(dian)(dian)熱(re)管(guan),當單獨使(shi)(shi)用(yong)(yong)時,其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)應為(wei)220V;若三(san)根電(dian)(dian)(dian)(dian)(dian)(dian)熱(re)管(guan)一(yi)起使(shi)(shi)用(yong)(yong),可以采(cai)用(yong)(yong)并(bing)聯接(jie)線接(jie)220V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya),或者采(cai)用(yong)(yong)星型(Y型)接(jie)線法接(jie)380V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。同(tong)樣,一(yi)根額定電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)為(wei)380V的(de)電(dian)(dian)(dian)(dian)(dian)(dian)熱(re)管(guan),當單獨使(shi)(shi)用(yong)(yong)時,其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)應為(wei)380V;若三(san)根電(dian)(dian)(dian)(dian)(dian)(dian)熱(re)管(guan)一(yi)起使(shi)(shi)用(yong)(yong),可以采(cai)用(yong)(yong)并(bing)聯接(jie)線接(jie)380V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya),或者采(cai)用(yong)(yong)三(san)角型(△型)接(jie)線法接(jie)380V電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。
此外,電(dian)熱管的(de)電(dian)阻(zu)絲的(de)粗(cu)細也會(hui)影(ying)響其使用的(de)電(dian)壓等級,電(dian)壓越小,電(dian)阻(zu)絲越粗(cu)。在(zai)實(shi)際應用中(zhong),電(dian)熱管的(de)電(dian)壓類型通常會(hui)在(zai)其外殼上標明,如果(guo)無(wu)法辨(bian)認,可以通過測量電(dian)流(liu)和計算功率的(de)方式來初步判斷,或者通過實(shi)際加熱效果(guo)來判斷。