Cryo-mechanical combination freezer
US4856285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1988 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Sep 20, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D16/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
This invention pertains to a method and apparatus for cooling and freezing of organic-comprised articles which makes use of liquid cryogen and of chilled gases from a mechanical refrigeration system to provide an economical process for reducing the temperature of the article. The article is contacted with a liquid cryogen and subsequently contacted with circulating cold gases in the mechanical refrigeration system. The improvement relates to the method and apparatus for producing the cold gases which are used in the mechanical refrigeration system; the method comprises using the cryogen vapors generated upon contact of the articles with the liquid cryogen as an indirect heat exchange fluid for removing heat from heat exchange fluids used in the mechanical refrigeration system. This indirect heat transfer using cryogen vapors supplements cooling of the mechanical refrigeration system cold gases by the mechanical refrigeration system chiller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.