Vacuum microwave thawing method and vacuum microwave thawing machine
US7279666B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2002 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Aug 31, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23B2/82
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thawing cycle, wherein after reduced-pressure process (G) is carried out to reduced-pressure balanced range (B), pressure restoration process (F) is started, and when the reduced-pressure of pressure restoration process (F) reaches a lower limit (P1) at which vacuum discharge does not occur, irradiation of microwaves is started, and after pressure restoration is carried out to a preset pressure restoration upper limit (D), reduced-pressure process (G′) is carried out once again, and irradiation of microwaves continues until the reduced-pressure reaches a lower limit (P1) at which vacuum discharge does not occur, and sublimation cooling by sublimation is carried out in the reduced-pressure process to reduced-pressure balanced range (B′) after the irradiation of microwaves is terminated, is carried out repeatedly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.