注(zhu)射冷水機(ji)主(zhu)要用于(yu)(yu)成型模(mo)(mo)具的(de)塑料加工(gong)機(ji)械上。向模(mo)(mo)具中(zhong)的(de)流道內注(zhu)入冷凍水，通過熱交換冷卻模(mo)(mo)具，保持溫度恒定，滿(man)足(zu)生產過程(cheng)的(de)需要。在這個過程(cheng)中(zhong)，模(mo)(mo)具相當于(yu)(yu)一(yi)個熱交換器。

噴射式冷水(shui)(shui)機組(zu)反相故(gu)障主要(yao)是(shi)電(dian)源(yuan)異常的常見故(gu)障。主要(yao)有(you)兩種原(yuan)因:一是(shi)冷水(shui)(shui)機保護器損壞(huai)，二是(shi)冷水(shui)(shui)機電(dian)源(yuan)缺(que)相或(huo)相序顛倒。

如何檢查(cha)電(dian)源保護器是否損壞。

在(zai)供(gong)電(dian)(dian)(dian)(dian)正常的(de)(de)情(qing)況下，關(guan)閉冷(leng)(leng)水機控(kong)制箱的(de)(de)空氣開關(guan)。此時，冷(leng)(leng)水機組電(dian)(dian)(dian)(dian)源(yuan)保(bao)(bao)(bao)護(hu)器(qi)上的(de)(de)指(zhi)示燈(deng)亮起。一般情(qing)況下，紅色表示供(gong)電(dian)(dian)(dian)(dian)，黃色表示正常供(gong)電(dian)(dian)(dian)(dian)。如果只有紅燈(deng)亮，說明低溫冷(leng)(leng)水機電(dian)(dian)(dian)(dian)源(yuan)缺電(dian)(dian)(dian)(dian)或順(shun)序不對。如果確認供(gong)電(dian)(dian)(dian)(dian)正常，但電(dian)(dian)(dian)(dian)源(yuan)保(bao)(bao)(bao)護(hu)器(qi)指(zhi)示燈(deng)不亮，則(ze)說明電(dian)(dian)(dian)(dian)源(yuan)保(bao)(bao)(bao)護(hu)器(qi)損壞。這時，就需(xu)要根據這些原因來判(pan)斷是失相還是相位反轉。可(ke)以找出功率(lv)較小的(de)(de)相消(xiao)除(chu)更換錯(cuo)誤的(de)(de)序，或者更換冷(leng)(leng)水機的(de)(de)電(dian)(dian)(dian)(dian)源(yuan)保(bao)(bao)(bao)護(hu)器(qi)。