Method and apparatus for cooling produce
US5277031A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1991 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Nov 27, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23B7/0425
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A vacuum cooling system is provided with controls for reliably and consistently controlling the cooling system for a chamber that holds produce provided with a vacuum pump, a refrigeration system, a vent valve, a bleed valve, first, second and third pressure detectors or pressure set points and a programmable logic controller for starting the pump and then automatically operating the refrigeration system in response to operation of the first pressure detector and then momentarily and repeatedly opening the bleed valve in response to operation of the second detector and wherein the third detector detects a pressure above the second level detector and the control system closes the bleed valve in response to operation of the third pressure detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.