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利用产品的电阻变化控制冷冻干燥的方法,在国外一些公司生产的冷冻干燥机上已经得到了实际的应用,并成为外国的专利。这是一种用于冷冻干燥方面的自动控制技术。使用这个方法,可以不用象通常那样预先制定一个冻干曲线,然后按冻干曲线控制机器的加热;而是利用升华产品本身的电阻变化来自动控制机器的加热。我们根据国外有关这方面的一些资料,探讨了这种方法的原理,动手制作和改制了一些
The use of product resistance change control freeze-drying method, some foreign companies in the freeze-dryer has been the practical application and become a foreign patent. This is an automatic control technique for freeze-drying. Using this method, it is not necessary to make a freeze-drying curve as usual and then to control the heating of the machine according to the lyophilization curve. Rather, the change in resistance of the sublimation product itself is used to automatically control the heating of the machine. Based on some information from abroad on this subject, we have explored the principle of this method, and we have created and restructured some