Cryogenic tunnel freezer

Details Cryogenic tunnel freezer Cryogenic tunnel freezer

1994-05-13

1995-08-29

Kilner, Christopher

Refrigeration

Processes

Treating an article

62374, 62380, 62388, F25D 1306, F25D 1702, F25D 2504, F25D 312

Patent

active

054449855

ABSTRACT:
A tunnel freezer uses carbon dioxide snow to directly contact product carried on a conveyor belt passing through the freezer. Fans are provided above and below the upper conveyor belt run carrying the product, with the fans above and below having downwardly directed exhaust. Trough-shaped deflector plates are provided adjacent the lower fans to circulate a flow adjacent the underneath surface of the upper conveyor belt run. Preferably, circulation adjacent the upper conveyor belt run is generally parallel to the upper conveyor belt run, and turning vanes are provided to deflect the flow upwardly through the upper conveyor belt run. Freezers may be provided with one or more cooling zones arranged in series along the path of conveyor belt travel.

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