作　　者： ; ; ;

机构地区： 广东海洋大学工程学院

出　　处： 《农机化研究》 2007年第10期113-116,共4页

摘　　要： 冻干室的压力是影响食品冻干品质和能耗的主要因素。为此,对常规不可调压的LGJ-18型冷冻干燥机进行改进设计,使其能克服手工调压的不足,并能在冻干过程中准确地调节真空压力。通过该装置的实验表明,与恒压冻干的贝柱能耗相比,冻干时间可以缩短10%左右。经调压参数优化后,冻干时间可以缩短约20%,大大减小了冻干的能耗。 The pressure of drying chamber is the major factor of freeze-drying quality and energy consumption. This paper changes the old design of LGJ-18 freeze-dryer .Make its adjustable pressure. Then, do experiment by this freeze-dryer , mainly explores the effects of adjustable pressure on the time of freeze-drying to obtain the optimal parameters as follows： high pressure 60Pa, low pressure 10Pa, adjustable temperature 0℃, The results indicate： Compared with the optimal constant pressure ,the method of adjustable pressure shortens the time of freeze-drying 10% or so ,optimal method shortens 20% or so, the energy consumption is a decrease greatly.

关 键 词： 食品机械 调压型冷冻干燥装置 实验研究 贝柱冻干

领　　域： [轻工技术与工程] [轻工技术与工程]