Freeze-dryer and method of controlling the same
US8240065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Nov 30, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B5/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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 6×10−2 and about 4×10−4 m2/m3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.