真zhen空kong冷leng凍dong幹gan燥zao是shi目mu前qian物wu質zhi脫tuo水shui的de一yi種zhong較jiao好hao的de方fang法fa，它ta可ke將jiang凍dong幹gan的de物wu質zhi，預yu先xian凍dong結jie，然ran後hou在zai低di溫wen低di壓ya的de條tiao件jian下xia，使shi物wu質zhi的de水shui分fen升sheng華hua，達da到dao脫tuo水shui的de目mu的de。升sheng華hua的de水shui汽qi采cai用yong冷leng凝ning的de方fang法fa加jia以yi收shou集ji。經jing過guo這zhe種zhong真zhen空kong冷leng凍dong幹gan操cao後hou的de物wu質zhi，就jiu變bian成cheng脫tuo水shui物wu質zhi了le。
經過真空冷凍幹燥後的物質，酶化作用微弱，原有的化學、生sheng理li性xing能neng基ji本ben不bu變bian，幹gan燥zao的de物wu質zhi呈cheng多duo孔kong性xing結jie構gou，體ti積ji基ji本ben不bu變bian，容rong易yi複fu原yuan。尤you為wei可ke佳jia的de是shi，真zhen空kong冷leng凍dong幹gan燥zao後hou的de物wu質zhi，可ke保bao存cun數shu年nian而er不bu致zhi變bian質zhi。
冷凝器是用來凝結升華的水汽的設備、其工作溢度可達-45℃~-60℃，冷源是由兩台2F6.3型氟利昂製冷機組提供的。
幹燥機的真空機組是由兩台2X-5型旋片式機械真空泵和一台ZL-8型羅茨式機械增壓泵組成。真空機組通過真空管路和真空閥門等與幹燥箱、冷(leng)凝(ning)器(qi)相(xiang)連(lian)接(jie)，構(gou)成(cheng)一(yi)個(ge)密(mi)封(feng)的(de)真(zhen)空(kong)係(xi)統(tong)。真(zhen)空(kong)機(ji)組(zu)配(pei)有(you)電(dian)接(jie)點(dian)真(zhen)空(kong)表(biao)，可(ke)以(yi)根(gen)據(ju)預(yu)先(xian)選(xuan)定(ding)的(de)真(zhen)空(kong)度(du)位(wei)，自(zi)動(dong)控(kong)製(zhi)羅(luo)茨(ci)泵(beng)的(de)啟(qi)動(dong)。幹(gan)燥(zao)箱(xiang)與(yu)冷(leng)凝(ning)器(qi)之(zhi)間(jian)的(de)真(zhen)空(kong)管(guan)路(lu)中(zhong)裝(zhuang)有(you)一(yi)個(ge)真(zhen)空(kong)蝶(die)閥(fa)，可(ke)以(yi)根(gen)據(ju)使(shi)用(yong)要(yao)求(qiu)隨(sui)時(shi)開(kai)關(guan)。冷(leng)凝(ning)器(qi)的(de)底(di)部(bu)裝(zhuang)有(you)分(fen)支(zhi)真(zhen)空(kong)管(guan)路(lu)通(tong)至(zhi)熱(re)風(feng)機(ji)，中(zhong)閥(fa)用(yong)50diefageduan，cifamenyufenzhiguanludezuoyongshiweilengningqihuashuangchuiganzhiyong，luocibengshangmiandezhenkongzhiguan，shidandushiyongjixiezhenkongbengshidetonglu，shangmianzhuangyoudiancifa，dangluocibengqidonghou，cikuojizidongguanbi。zhenkongguanlushang，zhuangyoudiancidaifangqijiezhifa，dangzhenkongbengtingzhishikezidongguanbizhenkongguanlu，tongshijiangkongqifangrubengnei，bimianzhenkongbengyouyinfuyazuoyongerchongruzhenkongguanlu。zhenkongbengdelianjieguanluzhijianzhuangyoubowenruanguan，yifangzhiyunzhuanshizhendongchuanzhiqibujian。
