固態繼(ji)電(dian)器(qi)、機(ji)械式繼(ji)電(dian)器(qi)和功率控(kong)制器(qi)都是可以用于紅外線加熱(re)管的恒(heng)溫控(kong)制,但(dan)它(ta)們(men)的原(yuan)理和控(kong)制方(fang)式并不相同(tong)。
固(gu)定(ding)繼電器是一種電子(zi)開(kai)關(guan),它(ta)使用半導體(ti)器(如晶(jing)體(ti)管、三極管等)進行開(kai)關(guan)控(kong)制(zhi)。當輸入信(xin)號滿足條(tiao)件,半導體(ti)器導通或(huo)關(guan)閉,從而控(kong)制(zhi)加(jia)熱(re)管輸出,保持爐(lu)內的恒定(ding)溫度。
機(ji)(ji)(ji)械式繼電(dian)(dian)器則是一種利用(yong)(yong)電(dian)(dian)磁原理來控(kong)制(zhi)線路中(zhong)電(dian)(dian)流的開(kai)關裝置。磁場(chang),引(yin)電(dian)(dian)機(ji)(ji)(ji)結構,使開(kai)關動作,從(cong)而(er)控(kong)制(zhi)電(dian)(dian)路中(zhong)的電(dian)(dian)流。機(ji)(ji)(ji)械式繼電(dian)(dian)器在電(dian)(dian)線中(zhong)應(ying)用(yong)(yong)廣泛,但由(you)于機(ji)(ji)(ji)械結構的限制(zhi),響應(ying)速度相對緩(huan)慢,機(ji)(ji)(ji)械式觸(chu)點壽命也相對較短。
上述的(de)固態繼電(dian)器(qi)和機(ji)械式繼電(dian)器(qi)都會導(dao)致紅外(wai)線(xian)加(jia)(jia)熱管啟(qi)動頻繁(肉眼可見的(de)忽明(ming)忽暗的(de)閃爍現(xian)象),由于紅外(wai)線(xian)加(jia)(jia)熱管在(zai)冷(leng)態時電(dian)阻(zu)非常(chang)小,啟(qi)動時也(ye)造成(cheng)巨大浪(lang)涌沖擊,縮短加(jia)(jia)熱管和配套電(dian)氣使用壽命。
功率控(kong)(kong)制器是一(yi)種調(diao)節電(dian)(dian)壓和(he)電(dian)(dian)流的電(dian)(dian)子設備(bei),響應迅速,算法科學,在短波紅外線(xian)控(kong)(kong)制中,功率控(kong)(kong)制器可以通過無(wu)(wu)級(ji)平滑(hua)調(diao)節加(jia)(jia)熱管的電(dian)(dian)壓和(he)電(dian)(dian)流,來(lai)控(kong)(kong)制加(jia)(jia)熱管功率,從而(er)調(diao)節加(jia)(jia)熱溫(wen)(wen)(wen)度,溫(wen)(wen)(wen)度更(geng)(geng)加(jia)(jia)線(xian)性,精度更(geng)(geng)高,特別在控(kong)(kong)制短波加(jia)(jia)熱管時,不會出現上述提(ti)(ti)到(dao)的兩種繼電(dian)(dian)器通斷滅燈開燈狀態,做到(dao)燈管控(kong)(kong)溫(wen)(wen)(wen)無(wu)(wu)閃爍,保持(chi)均一(yi)的輻(fu)照能(neng)量,提(ti)(ti)高被加(jia)(jia)熱產品(pin)的一(yi)致性,由(you)于無(wu)(wu)機械觸點,其使用壽命也(ye)更(geng)(geng)長(chang),而(er)穩(wen)定(ding)的線(xian)性輸出,注(zhu)定(ding)更(geng)(geng)加(jia)(jia)節約能(neng)耗,好比平穩(wen)駕(jia)駛(shi)肯定(ding)要比猛加(jia)(jia)油(you)猛剎(cha)車一(yi)樣更(geng)(geng)節能(neng)。
總的來說,固態繼電(dian)(dian)器(qi)、機(ji)械(xie)式繼電(dian)(dian)器(qi)和(he)功(gong)率(lv)控(kong)制(zhi)(zhi)器(qi)都可以(yi)控(kong)制(zhi)(zhi)溫度,但(dan)三者的特點顯而(er)易見,功(gong)率(lv)控(kong)制(zhi)(zhi)器(qi)通常可以(yi)為紅外線加(jia)熱管提供精(jing)(jing)確(que)的功(gong)率(lv)調節和(he)多種控(kong)制(zhi)(zhi)模式,如(ru)調整電(dian)(dian)壓、調整脈寬、周期(qi)調制(zhi)(zhi)等(deng),以(yi)滿足不同加(jia)熱需求(qiu),提高(gao)能量利用率(lv)和(he)加(jia)熱控(kong)制(zhi)(zhi)的精(jing)(jing)度。