Super-quick freezing method and apparatus therefor
US6250087A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2400/30
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A super-quick freezing method and apparatus for preserving the freshness of food ingredients and food products while enabling long-term storage is provided. Provided is a freezing store 11 capable of lowering the inner-temperature to -30.degree. C. to -100.degree. C.; and a fluctuating magnetic field generator 21 for applying a unidirectional magnetic field, which fluctuates within a 5% to 15% range about a arbitrary reference value fixed at a value between 1 to 20000 Gs in the positive and negative directions, to the central portion of the store. Also provided are ventilators 31 for circulating cold air within the store at a wind velocity of 1 to 5 m/sec; and a sound wave generator 41 for superimposing sound waves in the audio-frequency range with a sound pressure level of 2 to 10 dB onto the cold wind circulated by the ventilators 31. Also provided is an electric field generator 51 for applying an electric field with an intensity of 100 to 1000 kV/m to the central portion of the store. The fluctuating magnetic field generator 21 comprises permanent magnets 21a for applying a static magnetic field ranging between 1 to 20000 Gs to the central portion of the store, and electromagnet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.