| 摘要 |
A chamber for freeze-drying by cryosorption with liquid nitrogen cooling in a Dewar vessel (1), in which the chamber (8-10, 18, 19) is largely in the Dewar vessel (1), preferably in its neck, and its preferably cylindrical outer wall (9) is of metal, the lower edge of which is vacuumtightly secured to lower edge of a metal and preferably symmetrical in rotation component (8). The plane underside of the metal component (8) has a contact surface (25) which corresponds to the equally plane complementary surface (7) on the top of a body around which flows liquid nitrogen and is cooled by this component, the component (8) having a chamber (30) to accept the dessiccant (31) for cryosorption, e.g. a molecular sieve, and a connection (45) with the drying chamber (34). The upper edge of the metal wall (9) or a ring (10) vacuumtightly secured thereto is outside the Dewar vessel (1) and is therefore at approximately room temperature and has a vacuum connector (14) for the connection of commercially available vacuum components, and the aperture on the upper side of the ring (10) can be vacuumtightly sealed preferably by a commercially available O-ring together with a cover (19). |
