CO.sub.2 Freezer
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United States of America Patent
Stats
-
Jun 8, 1982
Grant Date -
N/A
app pub date -
May 4, 1981
filing date -
May 4, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A CO.sub.2 food freezer has an elongated enclosure through which material to be cooled is carried on an endless porous belt conveyor with an upper operating belt run vertically spaced from the lower return run to provide an intermediate region therebetween. Liquid CO.sub.2 injection means is located in an upper region to direct CO.sub.2 snow plus cold CO.sub.2 vapor downward onto material being conveyed. Blowers aimed at an angle of between about 5.degree. and about 35.degree. upward from the horizontal are located in the intermediate region, and fans in the upper region direct CO.sub.2 vapor downward onto material on the belt. The belt includes a plurality of longitudinally spaced transverse rods and a plurality of wire sections that respectively interconnect adjacent rods in pairs. The wire sections are bent so that all segments of wire extending generally between said rods lie in substantially the same plane which constitutes the upper surface of the upper run. The rods effectively deflect cold CO.sub.2 vapor from the blowers upward against the undersurface of material being carried along the belt and assure efficient freezing is accomplished.
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