固態繼(ji)電(dian)器(qi)、機械式(shi)繼(ji)電(dian)器(qi)和功率控(kong)制(zhi)器(qi)都是可以(yi)用于(yu)紅(hong)外線加熱管的(de)恒(heng)溫控(kong)制(zhi),但它(ta)們的(de)原理和控(kong)制(zhi)方式(shi)并不相(xiang)同。
固定(ding)繼電(dian)器是一(yi)種電(dian)子(zi)開(kai)關,它(ta)使用半導體器(如晶體管、三極管等)進行開(kai)關控制(zhi)。當輸入信(xin)號(hao)滿足條件,半導體器導通或關閉,從而控制(zhi)加熱管輸出,保持(chi)爐內的恒定(ding)溫度。
機(ji)械式(shi)(shi)繼電(dian)器則是(shi)一(yi)種利用(yong)電(dian)磁(ci)原理來控(kong)制(zhi)線路中電(dian)流的開關裝置(zhi)。磁(ci)場,引電(dian)機(ji)結構,使開關動(dong)作,從而控(kong)制(zhi)電(dian)路中的電(dian)流。機(ji)械式(shi)(shi)繼電(dian)器在電(dian)線中應用(yong)廣泛(fan),但由(you)于機(ji)械結構的限制(zhi),響應速(su)度相對(dui)緩慢,機(ji)械式(shi)(shi)觸(chu)點壽命(ming)也相對(dui)較短。
上述(shu)的(de)固態(tai)繼(ji)電(dian)器(qi)和機械式繼(ji)電(dian)器(qi)都會導(dao)致紅外(wai)線加(jia)熱(re)管啟動(dong)(dong)頻(pin)繁(fan)(肉眼(yan)可見的(de)忽明忽暗的(de)閃爍現象(xiang)),由(you)于紅外(wai)線加(jia)熱(re)管在冷態(tai)時(shi)電(dian)阻(zu)非常小,啟動(dong)(dong)時(shi)也造成(cheng)巨大浪(lang)涌沖擊,縮短加(jia)熱(re)管和配套電(dian)氣使用(yong)壽命(ming)。
功率(lv)控(kong)(kong)制(zhi)器(qi)(qi)是一(yi)種(zhong)(zhong)調節(jie)電(dian)壓和(he)電(dian)流的(de)電(dian)子(zi)設備(bei),響應迅速,算(suan)法科(ke)學,在短(duan)波(bo)紅外線(xian)控(kong)(kong)制(zhi)中,功率(lv)控(kong)(kong)制(zhi)器(qi)(qi)可以通(tong)(tong)過無級平(ping)滑調節(jie)加熱(re)管(guan)的(de)電(dian)壓和(he)電(dian)流,來控(kong)(kong)制(zhi)加熱(re)管(guan)功率(lv),從(cong)而(er)調節(jie)加熱(re)溫(wen)度(du),溫(wen)度(du)更(geng)(geng)加線(xian)性,精度(du)更(geng)(geng)高,特(te)別在控(kong)(kong)制(zhi)短(duan)波(bo)加熱(re)管(guan)時(shi),不會(hui)出(chu)現上述(shu)提(ti)到的(de)兩種(zhong)(zhong)繼(ji)電(dian)器(qi)(qi)通(tong)(tong)斷(duan)滅燈(deng)開燈(deng)狀態,做(zuo)到燈(deng)管(guan)控(kong)(kong)溫(wen)無閃爍,保持均(jun)一(yi)的(de)輻照能(neng)量(liang),提(ti)高被加熱(re)產品的(de)一(yi)致性,由于(yu)無機械觸點,其使(shi)用壽命也更(geng)(geng)長,而(er)穩定(ding)的(de)線(xian)性輸出(chu),注定(ding)更(geng)(geng)加節(jie)約能(neng)耗,好(hao)比平(ping)穩駕(jia)駛肯定(ding)要(yao)比猛加油猛剎車一(yi)樣更(geng)(geng)節(jie)能(neng)。
總(zong)的(de)(de)來說,固態(tai)繼電器(qi)、機械式繼電器(qi)和功率控(kong)(kong)制(zhi)器(qi)都可以(yi)控(kong)(kong)制(zhi)溫度,但三者(zhe)的(de)(de)特點顯而易見,功率控(kong)(kong)制(zhi)器(qi)通(tong)常(chang)可以(yi)為紅外線加熱(re)管提(ti)供精(jing)確的(de)(de)功率調節(jie)和多種控(kong)(kong)制(zhi)模式,如(ru)調整(zheng)(zheng)電壓(ya)、調整(zheng)(zheng)脈寬、周期(qi)調制(zhi)等,以(yi)滿足不(bu)同加熱(re)需求,提(ti)高能量利用率和加熱(re)控(kong)(kong)制(zhi)的(de)(de)精(jing)度。