Freeze-dryer and method of controlling the same

F - Mech Eng,Light,Heat,Weapons – 26 – B

Patent

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F26B 5/06 (2006.01) B65D 85/00 (2006.01)

Patent

CA 2757027

A freeze-dryer and method of controlling the same is provided. The disclosed freeze-dryer includes a chamber adapted to hold material or product to be freeze-dried; one or more depressurization orifices; a gas pressurization circuit having a source of gas to pressurize the chamber to a prescribed pressure; a depressurization circuit coupled to the chamber via the one or more orifices and having a depressurizing control valve; and a control unit adapted to pressurize the chamber with the source of gas and actuate the depressurizing control valve to depressurize the chamber upon command. The ratio of total depressurization orifice area to the chamber volume is preferably between about 6x10 -2 and about 4x10 -4 m2/m3.

La présente invention concerne un lyophilisateur et son procédé de contrôle. Le lyophilisateur décrit comprend : une chambre adaptée pour contenir des matériaux ou des produits à lyophiliser ; un ou plusieurs orifices de dépressurisation ; un circuit de pressurisation à gaz comportant une source de gaz pour amener la chambre à une pression prescrite ; un circuit de dépressurisation couplé à la chambre via le ou les orifices, et comportant une vanne de contrôle de dépressurisation ; et une unité de contrôle adaptée pour pressuriser la chambre avec la source de gaz et actionner la vanne de contrôle de dépressurisation pour dépressuriser la chambre sur commande. Le rapport entre l'aire de l'orifice de dépressurisation et le volume de la chambre se situe de préférence entre environ 6x10-2 et environ 4xl0-4 m2/m3.

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