The enactment of freezing-drying curve
Academy of Military Medical Sciences experiment instrument plant senior engineer original factory director WangLiHua

　　 I am engaged in developing of the vacuum freeze dryer machine and Level analysis congealer and other experiments for more than 20 years. I am the two representative directors of items which holding the post of "95" national science and technology departments to offend pass topic. Now I’m the general manager of BeiJing SongYuan HuaXing Technology Development Co. Ltd.
　　Here is my viewpoint about the effect of drying curves in the process of freezing-drying, now I provide it for you for your information:
The freezing-drying products of biological products need to have certain physical appearance, even color, qualified of cripple remaining water content, good deliquescence, efficiently of livability, longer conservancy period, therefore not only create process and seal preservation before the freeze-drying should be controlled. What’s more important is to carry on the comprehensive control of each stage’s parameter of the freeze-drying process, then you can get a high-quality product, drying curves is the basic basis to carry on the control of the freeze-drying.
　　The drying curves is the curve relation between the freeze box’s temperature and time, taking temperature as vertical ordinate and time for horizontal ordinate sit a mark, it reflects different time flag temperature’s change situation during the freezing and drying process.
　　The freezing and drying curve take the flag temperature as basis, because the product is controlled by the flag temperature, the flag temperature has also controlled the product’s temperature, the enactment of freezing and drying curve needs to consider the factors as follows:
　　The species of product, different product’s altogether melting point is different, altogether melting point product requests the low pre-frozen temperature, heats up when the flag temperature corresponding is also low, must act according to experiments discovers a product the most superior freezing speed, by obtains the high grade product and the short freeze-drying time.
　　Time dissimilarity is also request to remnants remaining water different, keeping time dissimilarity is also request to remnants remaining water different, to drying time correspond also different, how much pack quantity, the species of airtight machine, freeze dryer machine of function's etc. The factors are relate to a curve of establish, customer should according to freeze dryer product of property, according to former of freeze dryer experience, set the drying curves, in order to get high-quality of freeze dryer product.
　　The machine can be provided as customer to establish drying curves arbitrarily according to the effective demand.