冷(leng)凍(dong)在日常生(sheng)(sheng)(sheng)活(huo)、生(sheng)(sheng)(sheng)產中運用十分(fen)廣(guang)泛，適合化(hua)工(gong)、制(zhi)藥、生(sheng)(sheng)(sheng)化(hua)等(deng)低溫反(fan)應設備(bei)等(deng)方面。隨著經(jing)濟的發(fa)展人們的生(sheng)(sheng)(sheng)活(huo)水(shui)平(ping)得到了提高(gao)，在制(zhi)藥化(hua)工(gong)的制(zhi)造和制(zhi)冷(leng)；一(yi)些抗生(sheng)(sheng)(sheng)素疫苗需在低溫下儲存；在化(hua)工(gong)生(sheng)(sheng)(sheng)產中需在低溫下吸收精餾、結晶都需要冷(leng)凍(dong)等(deng)等(deng)。

　　超低(di)(di)溫(wen)(wen)工業冷(leng)(leng)(leng)水(shui)機(ji)分(fen)(fen)為單(dan)壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)和雙壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)。單(dan)壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)是指制(zhi)冷(leng)(leng)(leng)劑(ji)在制(zhi)冷(leng)(leng)(leng)系(xi)統內相繼(ji)經(jing)(jing)過(guo)(guo)(guo)單(dan)壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)、冷(leng)(leng)(leng)凝、節(jie)流、蒸(zheng)(zheng)發(fa)四個過(guo)(guo)(guo)程，完成單(dan)制(zhi)冷(leng)(leng)(leng)的(de)(de)循(xun)環。雙壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)分(fen)(fen)為兩(liang)個過(guo)(guo)(guo)程，將(jiang)氣(qi)(qi)相的(de)(de)制(zhi)冷(leng)(leng)(leng)劑(ji)經(jing)(jing)低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)缸壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)到中(zhong)(zhong)間壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)、過(guo)(guo)(guo)熱(re)(re)蒸(zheng)(zheng)汽(qi)，其過(guo)(guo)(guo)熱(re)(re)蒸(zheng)(zheng)汽(qi)通過(guo)(guo)(guo)中(zhong)(zhong)間冷(leng)(leng)(leng)卻器(qi)與從(cong)冷(leng)(leng)(leng)凝器(qi)送來(lai)的(de)(de)氣(qi)(qi)液(ye)(ye)混合物(wu)中(zhong)(zhong)的(de)(de)液(ye)(ye)態接觸，將(jiang)其過(guo)(guo)(guo)熱(re)(re)部分(fen)(fen)的(de)(de)熱(re)(re)量傳給(gei)飽和液(ye)(ye)體，使部分(fen)(fen)飽和液(ye)(ye)體氣(qi)(qi)化(hua)為飽和蒸(zheng)(zheng)汽(qi)，再(zai)(zai)經(jing)(jing)過(guo)(guo)(guo)中(zhong)(zhong)間冷(leng)(leng)(leng)卻后再(zai)(zai)進(jin)入(ru)高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)缸，被(bei)(bei)壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)成更高(gao)(gao)的(de)(de)過(guo)(guo)(guo)熱(re)(re)蒸(zheng)(zheng)汽(qi)，依次進(jin)入(ru)冷(leng)(leng)(leng)凝器(qi)中(zhong)(zhong)用水(shui)冷(leng)(leng)(leng)凝，進(jin)入(ru)儲液(ye)(ye)罐，再(zai)(zai)經(jing)(jing)過(guo)(guo)(guo)高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)經(jing)(jing)濟器(qi)，再(zai)(zai)通過(guo)(guo)(guo)節(jie)流膨(peng)脹(zhang)閥(fa)降低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)和溫(wen)(wen)度再(zai)(zai)送到蒸(zheng)(zheng)發(fa)器(qi)。也就是液(ye)(ye)態制(zhi)冷(leng)(leng)(leng)液(ye)(ye)在蒸(zheng)(zheng)發(fa)器(qi)中(zhong)(zhong)吸(xi)(xi)收被(bei)(bei)冷(leng)(leng)(leng)卻物(wu)料的(de)(de)熱(re)(re)量后，氣(qi)(qi)化(hua)成低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)低(di)(di)溫(wen)(wen)的(de)(de)蒸(zheng)(zheng)汽(qi)。蒸(zheng)(zheng)汽(qi)被(bei)(bei)壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)機(ji)吸(xi)(xi)入(ru)，壓(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)成高(gao)(gao)溫(wen)(wen)的(de)(de)蒸(zheng)(zheng)汽(qi)后排入(ru)冷(leng)(leng)(leng)凝器(qi)，在冷(leng)(leng)(leng)凝器(qi)中(zhong)(zhong)向水(shui)或空氣(qi)(qi)冷(leng)(leng)(leng)卻介(jie)質放(fang)熱(re)(re)，冷(leng)(leng)(leng)凝為高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)液(ye)(ye)體，在經(jing)(jing)膨(peng)脹(zhang)閥(fa)節(jie)流為低(di)(di)溫(wen)(wen)低(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)的(de)(de)制(zhi)冷(leng)(leng)(leng)劑(ji)，再(zai)(zai)次進(jin)入(ru)蒸(zheng)(zheng)發(fa)器(qi)吸(xi)(xi)熱(re)(re)氣(qi)(qi)化(hua)。

　　現在的(de)多晶硅企(qi)業較常(chang)采(cai)用的(de)是螺(luo)桿(gan)壓(ya)縮(suo)(suo)機。它們(men)是利(li)用置于機體(ti)(ti)內(nei)的(de)兩(liang)個具有螺(luo)旋(xuan)狀齒(chi)槽的(de)螺(luo)桿(gan)相(xiang)嚙(nie)合(he)旋(xuan)轉及其(qi)與(yu)機體(ti)(ti)內(nei)壁(bi)和(he)吸(xi)、排氣端座內(nei)壁(bi)的(de)配合(he)，造成齒(chi)間容積的(de)變化，從而完成氣體(ti)(ti)的(de)吸(xi)入、壓(ya)縮(suo)(suo)及排出過程。轉子為一(yi)對(dui)互相(xiang)嚙(nie)合(he)的(de)螺(luo)桿(gan)，其(qi)上具有特殊的(de)螺(luo)旋(xuan)齒(chi)形。其(qi)中(zhong)凸齒(chi)形的(de)稱為陽螺(luo)桿(gan)(或稱陽(yang)轉子)，凹齒形(xing)的(de)稱(cheng)為陰(yin)螺桿(或稱陰轉子(zi))。由于還(huan)原與氫化(hua)的(de)處理量較大(da)用的(de)就是雙壓縮，合成的(de)量較小用的(de)是單壓縮。

無錫冠亞超低溫(wen)(wen)工(gong)業冷(leng)水(shui)機制冷(leng)溫(wen)(wen)度范圍從－150℃~－5℃，制(zhi)(zhi)冷(leng)速(su)(su)度快，安全可靠，用(yong)于液體快速(su)(su)制(zhi)(zhi)冷(leng)，采用(yong)二次過冷(leng)技術、全套冷(leng)控件，制(zhi)(zhi)冷(leng)迅(xun)速(su)(su)，制(zhi)(zhi)冷(leng)溫度低(di)。