CO.sub.2 food freezer

Details CO.sub.2 food freezer CO.sub.2 food freezer

1990-03-20

1991-06-04

Capossela, Ronald C.

Refrigeration

Processes

Treating an article

62381, F25D 1306

Patent

active

050203304

ABSTRACT:
A food freezer having a thermally insulated enclosure and an endless conveyor having a loading section, a food freezing section and an unloading section. Blowers circulate gas throughout the interior of the enclosure, and devices for injecting liquid CO.sub.2 to preferably cause CO.sub.2 snow particles to impinge upon the food products on the belt are located at selected positions about the belt and may be at various vertical levels, some of which are preferably at least slightly above the belt. By piping the liquid CO.sub.2 so that it flows only upward and/or horizontally toward the spray nozzles within the thermally insulated enclosure, any solid CO.sub.2 that may accumulate adjacent the upstream side of the spray nozzle orifices is melted by CO.sub.2 vapor which gravitates upward in the vertical piping.

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patent: 4333318 (1982-06-01), Tyree, Jr.
patent: 4356707 (1982-11-01), Tyree, Jr. et al.
patent: 4866946 (1989-09-01), Klee

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