Method and Device for Freeze-Drying Products
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United States of America Patent
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Issued Date -
Apr 30, 2009
app pub date -
Feb 1, 2005
filing date -
Feb 17, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a method and to a device for freeze-drying products using a chamber (1) having surfaces (2), whose temperature can be regulated, and condensation surfaces (5). Water penetrating from the product in the form of vapour condenses on the surface of the condensation surfaces, and measurements are taken on the documentation of the process during the freeze-drying process. The aim of the invention is to improve the freeze-drying process in relation to the documentation thereof and, at the same time, to reduce technical complexity of the device which is suitable for carrying out said method. As a result, running of the vapour flow is determined between the product and the condensation surfaces (5) and the amount of water penetrating from the product in the form of vapour is calculated by means of temporal integration.
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