国产的医用冻干机真空干燥箱内均无自动压盖装置。为了提高制品抽真空和压盖的工效,我国血液制品生产部门目前多采用以下方法:即当制品达到规定的冻干标准后,从真空干燥箱外由手工放好胶盖再送入箱内继续抽真空,然后利用突然放气产生的“爆炸性加压”作用,使胶盖牢牢地被吸在制品的瓶口上。在对真空干燥箱进行两次放气的过程中,使制品可能受到细菌污染。为解决通入空气的净化问题,我站采用核工业部第八研究所研制的“NF 型金 Domestic medical freeze-drying machine vacuum oven without automatic gland device. In order to improve the product vacuuming and gland ergonomics, China’s blood products manufacturing sector now use the following methods: that is, when the product reaches the required freeze-dried standard, from the vacuum oven manually put the plastic cover and then into the box to continue pumping Vacuum, and then use the “explosive pressure” effect caused by a sudden deflation, so that the plastic cover firmly sucked in the bottle on the product. During deflation of the vacuum oven twice, the product may be subject to bacterial contamination. In order to solve the problem of purifying air, I use the "NF gold