| 摘要 |
An apparatus for treating items such as for freezing, drying, or baking food items, includes an inclined track or trough with a perforated bottom through which pressurized treating gas flows to raise the item and hold it suspended above the bottom of the trough to allow the item to move by gravity down the trough as the treating gas, such as a cooling or refrigerating gas when the item is being cooled or frozen or a hot gas when the item is to be cooked, flows under, around, and over the item to be treated to thereby treat such item. It is preferred that the trough be a spiral trough surrounding a chamber containing pressurized treating fluid which flows from the chamber into a plenum under the perforated trough bottom, through the perforations and around the item and then out of the trough. The items can be stopped in the trough so that they remain for a predetermined treatment time.
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