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冷水機四大部件之蒸發器的選購方法

2023-10-13

1. 水(shui)箱(xiang)浸式(shi)蒸發器(qi)是(shi)一(yi)種用(yong)于開式(shi)循環(huan)(huan)(huan)系(xi)統(tong)的(de)非揮(hui)(hui)發性(xing)制(zhi)冷劑。在鹵水(shui)制(zhi)冰(bing)(bing)罐(guan)的(de)生產(chan)過程(cheng)中,不能采用(yong)閉式(shi)循環(huan)(huan)(huan)系(xi)統(tong),因(yin)此該蒸發器(qi)是(shi)**理想的(de)制(zhi)冰(bing)(bing)罐(guan)。水(shui)箱(xiang)浸式(shi)蒸發器(qi)也可(ke)用(yong)于在鹽(yan)水(shui)中冷卻或冷凍袋(dai)裝食品,或用(yong)于集中噴(pen)霧空(kong)(kong)調制(zhi)冷系(xi)統(tong)。2. 鹽(yan)水(shui)對(dui)黑(hei)色金(jin)屬(shu)有(you)很(hen)強的(de)腐蝕性(xing)。當它與空(kong)(kong)氣(qi)接觸時,它的(de)腐蝕更(geng)加嚴重。因(yin)此,如果生產(chan)工藝允許,盡量使用(yong)閉合循環(huan)(huan)(huan)。對(dui)于揮(hui)(hui)發性(xing)制(zhi)冷劑循環(huan)(huan)(huan)系(xi)統(tong),必(bi)須采用(yong)閉式(shi)循環(huan)(huan)(huan)。在這兩種情況下,臥式(shi)殼管蒸發器(qi)是(shi)制(zhi)冷機組的(de)**選擇。

3.工(gong)業制冷(leng)(leng)(leng)機組(zu)采用(yong)水箱浸沒(mei)(mei)式或殼管式蒸(zheng)(zheng)發器時,制冷(leng)(leng)(leng)劑(ji)(ji)工(gong)作溫(wen)度應比制冷(leng)(leng)(leng)劑(ji)(ji)蒸(zheng)(zheng)發器工(gong)作溫(wen)度高5℃左右,制冷(leng)(leng)(leng)劑(ji)(ji)凝固點應比制冷(leng)(leng)(leng)劑(ji)(ji)蒸(zheng)(zheng)發溫(wen)度低(di)5~8℃(水箱浸沒(mei)(mei)式蒸(zheng)(zheng)發器為5~6℃,殼管式蒸(zheng)(zheng)發器為6~8℃)。

4. 冷(leng)(leng)卻排(pai)氣管(guan)和冷(leng)(leng)卻風扇(shan)的(de)選擇(ze):冷(leng)(leng)庫中,通(tong)常(chang)使用冷(leng)(leng)卻風扇(shan)來提高(gao)冷(leng)(leng)卻溫度(du)。對于安裝在小(xiao)型冷(leng)(leng)庫的(de)冰(bing)箱,可采(cai)用彎管(guan)或壁管(guan)加頂(ding)管(guan)。冷(leng)(leng)庫通(tong)常(chang)采(cai)用壁管(guan)或頂(ding)管(guan),防(fang)止貨物干燥。如(ru)果在冷(leng)(leng)庫中沒(mei)有干燥問題,一般采(cai)用冷(leng)(leng)卻風機。

5. 對(dui)于蒸發(fa)溫度較低(di)的工業(ye)制冷機組蒸發(fa)器,要注意(yi)制冷劑(ji)液柱高度對(dui)制冷機組蒸發(fa)溫度的影響。蒸發(fa)溫度越低(di),液柱的影響越大。因(yin)此,應采取措(cuo)施(shi),降低(di)蒸發(fa)器內(nei)液柱的高度。