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1.发明申请公开(公告)号：US20190120535A1
公开(公告)日：2019-04-25
申请号：US16162579
申请日：2018-10-17
发明人： Frank Harms , Michael Ebert , Sven Ostermeier
摘要： The invention relates to a method for the pressure-based determining of a product parameter in a freeze dryer, in particular a product temperature. In a method of this type at a point in time tSTART a closing element as an intermediate valve between an ice chamber and a drying chamber of the freeze dryer is closed. Then, during a pressure rise occurring due to the sublimation pressure values (P1, P2, . . . ) are measured in the drying chamber. At a point in time tEND then the closing element is opened. From the measured pressure values (P1, P2, . . . ) an approximation of a product parameter, in particular a product temperature TAPPROX, is determined.According to the invention the point in time tEND is determined specifically for the measured pressure values (P1, P2, . . . ) such that the time span for which the closing element is closed and the pressure rising occurs depends on the determined pressure values and such that the time span is variable during a drying process.By use of the inventive method it is in particular possible to avoid an undesired start of thawing of the drying product.
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2.发明申请公开(公告)号：US20190197269A1
公开(公告)日：2019-06-27
申请号：US16207507
申请日：2018-12-03
发明人： Sven Ostermeier , Michael Umbach , Martin Dill , Frank Harms
CPC分类号： G06K7/10366 , F26B5/06 , F26B25/22 , G01D11/00 , G06K19/0723 , H02J50/20
摘要： The invention relates to a freeze-dryer product sensor (1). The freeze-dryer product sensor (1) comprises a transducer (13) for sensing a product parameter and an RFID unit (14). In a storage unit (28) of the RFID unit (14) at least one characteristic parameter (29) specific to the freeze-dryer product sensor (1) is stored.According to the invention the freeze-dryer product sensor (1) comprises only one single antenna unit (3), which leads to a reduced effort in constructing the freeze-dryer product sensor (1).The inventive freeze-dryer product sensor may be employed in a drying vessel. The invention also relates to a method for operating such a freeze-dryer product sensor.
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公开(公告)号：US10982896B2
公开(公告)日：2021-04-20
申请号：US16162579
申请日：2018-10-17
发明人： Frank Harms , Michael Ebert , Sven Ostermeier
摘要： Methods are disclosed for the pressure-based determining of a product parameter in a freeze dryer, in particular a product temperature. At a point in time tSTART, a closing element as an intermediate valve between an ice chamber and a drying chamber of the freeze dryer is closed. Then, during a pressure rise occurring due to the sublimation pressure values (P1, P2, . . . ) are measured in the drying chamber. At a point in time tEND then the closing element is opened. From the measured pressure values (P1, P2, . . . ) an approximation of a product parameter, in particular a product temperature TAPPROX, is determined. The point in time tEND is determined specifically for the measured pressure values (P1, P2, . . . ) such that the time span for which the closing element is closed depends on the determined pressure values and such that the time span is variable during a drying process.
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