| 摘要 |
A freeze drying apparatus of the manifold type having a generally horizontal free standing condenser tube enclosed within a removable hollow manifold having a plurality of ports formed in it for communication with the interior of containers having specimens to be sublimated. The condenser tube is disposed generally along the central axis of the manifold so that the distance between the condensing surface and the manifold ports is relatively short and constant to provide fast and uniform sublimation. The condenser tube is packed with a woven copper mesh to provide increased surface area for wetting by the refrigerant fluid thereby increasing the condenser capacity and reducing its temperature. The location of the condenser tube within the manifold provides a single volume to be evacuated and speeds system recovery as new materials are added to the system.
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