冷(leng)凍在日常生(sheng)活(huo)、生(sheng)產(chan)中運用十分廣泛，適合化工、制(zhi)(zhi)藥(yao)(yao)、生(sheng)化等(deng)(deng)低溫反應設(she)備等(deng)(deng)方(fang)面。隨(sui)著經濟的發(fa)展人們的生(sheng)活(huo)水平(ping)得到了提高，在制(zhi)(zhi)藥(yao)(yao)化工的制(zhi)(zhi)造和制(zhi)(zhi)冷(leng)；一(yi)些抗生(sheng)素疫苗需(xu)(xu)在低溫下(xia)儲(chu)存；在化工生(sheng)產(chan)中需(xu)(xu)在低溫下(xia)吸收精餾、結晶都需(xu)(xu)要冷(leng)凍等(deng)(deng)等(deng)(deng)。

　　超低溫(wen)(wen)工業冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)水機分為(wei)(wei)單(dan)壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)和(he)雙壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)。單(dan)壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)是指制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)在(zai)(zai)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)系統內相(xiang)繼經(jing)過(guo)(guo)單(dan)壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)、冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝、節(jie)流、蒸(zheng)(zheng)(zheng)(zheng)(zheng)發(fa)四個過(guo)(guo)程，完(wan)成單(dan)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)的循(xun)環。雙壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)分為(wei)(wei)兩個過(guo)(guo)程，將氣(qi)(qi)(qi)(qi)相(xiang)的制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)經(jing)低壓(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)缸壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)到中(zhong)(zhong)間壓(ya)(ya)(ya)(ya)(ya)力、過(guo)(guo)熱(re)(re)蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)，其過(guo)(guo)熱(re)(re)蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)通(tong)(tong)過(guo)(guo)中(zhong)(zhong)間冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)卻(que)器(qi)(qi)與從冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝器(qi)(qi)送來的氣(qi)(qi)(qi)(qi)液(ye)混合物中(zhong)(zhong)的液(ye)態接觸，將其過(guo)(guo)熱(re)(re)部(bu)分的熱(re)(re)量(liang)傳給飽(bao)和(he)液(ye)體，使部(bu)分飽(bao)和(he)液(ye)體氣(qi)(qi)(qi)(qi)化為(wei)(wei)飽(bao)和(he)蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)，再(zai)(zai)經(jing)過(guo)(guo)中(zhong)(zhong)間冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)卻(que)后再(zai)(zai)進(jin)(jin)入(ru)(ru)高壓(ya)(ya)(ya)(ya)(ya)氣(qi)(qi)(qi)(qi)缸，被壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)成更(geng)高的過(guo)(guo)熱(re)(re)蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)，依次進(jin)(jin)入(ru)(ru)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝器(qi)(qi)中(zhong)(zhong)用水冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝，進(jin)(jin)入(ru)(ru)儲液(ye)罐，再(zai)(zai)經(jing)過(guo)(guo)高壓(ya)(ya)(ya)(ya)(ya)經(jing)濟(ji)器(qi)(qi)，再(zai)(zai)通(tong)(tong)過(guo)(guo)節(jie)流膨脹(zhang)閥降低壓(ya)(ya)(ya)(ya)(ya)力和(he)溫(wen)(wen)度再(zai)(zai)送到蒸(zheng)(zheng)(zheng)(zheng)(zheng)發(fa)器(qi)(qi)。也就(jiu)是液(ye)態制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)液(ye)在(zai)(zai)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發(fa)器(qi)(qi)中(zhong)(zhong)吸收被冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)卻(que)物料的熱(re)(re)量(liang)后，氣(qi)(qi)(qi)(qi)化成低壓(ya)(ya)(ya)(ya)(ya)低溫(wen)(wen)的蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)。蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)被壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)機吸入(ru)(ru)，壓(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)(suo)(suo)成高溫(wen)(wen)的蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽(qi)(qi)后排入(ru)(ru)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝器(qi)(qi)，在(zai)(zai)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝器(qi)(qi)中(zhong)(zhong)向水或(huo)空(kong)氣(qi)(qi)(qi)(qi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)卻(que)介質(zhi)放熱(re)(re)，冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)凝為(wei)(wei)高壓(ya)(ya)(ya)(ya)(ya)液(ye)體，在(zai)(zai)經(jing)膨脹(zhang)閥節(jie)流為(wei)(wei)低溫(wen)(wen)低壓(ya)(ya)(ya)(ya)(ya)的制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)(leng)劑(ji)，再(zai)(zai)次進(jin)(jin)入(ru)(ru)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發(fa)器(qi)(qi)吸熱(re)(re)氣(qi)(qi)(qi)(qi)化。

　　現在的(de)(de)(de)多晶硅(gui)企業較常(chang)采(cai)用(yong)的(de)(de)(de)是螺桿(gan)壓縮機(ji)。它們是利用(yong)置于機(ji)體(ti)內的(de)(de)(de)兩個具有螺旋狀齒(chi)槽的(de)(de)(de)螺桿(gan)相(xiang)(xiang)嚙合旋轉及(ji)其與機(ji)體(ti)內壁(bi)和吸、排氣(qi)端(duan)座內壁(bi)的(de)(de)(de)配合，造成(cheng)齒(chi)間容積的(de)(de)(de)變(bian)化，從而完成(cheng)氣(qi)體(ti)的(de)(de)(de)吸入、壓縮及(ji)排出過程。轉子為一(yi)對(dui)互相(xiang)(xiang)嚙合的(de)(de)(de)螺桿(gan)，其上具有特殊的(de)(de)(de)螺旋齒(chi)形(xing)。其中凸(tu)齒(chi)形(xing)的(de)(de)(de)稱為陽(yang)螺桿(gan)(或稱陽轉子)，凹齒形的稱為陰(yin)螺(luo)桿(或稱(cheng)陰轉子(zi))。由于還原與(yu)氫化的處(chu)理量較(jiao)大用(yong)的就(jiu)是雙(shuang)壓縮(suo)，合成的量較(jiao)小用(yong)的是單壓縮(suo)。

無錫(xi)冠亞(ya)超低(di)溫(wen)工(gong)業冷(leng)(leng)水機制冷(leng)(leng)溫(wen)度范圍從－150℃~－5℃，制(zhi)冷速度快，安(an)全可(ke)靠(kao)，用于液體快速制(zhi)冷，采用二(er)次過冷技術(shu)、全套冷控(kong)件，制(zhi)冷迅速，制(zhi)冷溫度低。