Importance

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Abstract

In a food transfer heat treatment apparatus using a spiral transfer belt, heat treatment gas blowing means and a heat treatment gas circulating method for enhancing the heat transfer efficiency between a heat treatment gas and food and for improving the heat treatment effect are realized to expand the degree of freedom for the layout of the apparatus and to simplify the assembly. Provided is a spiral transfer heat treatment apparatus comprising endless conveyer belts (2) for circulating the food (f) in a store room (1), and a spiral moving unit (3) for causing a heat treatment gas (c) to act on the food (f) while transferring the food (f) on the conveyer belts (2). The spiral transfer heat treatment apparatus further comprises a heat treatment gas generating device (10) arranged in the inside space of the spiral moving unit (3), a distribution duct (13) arranged between the heat treatment gas generating device (10) and the spiral moving unit (3) for receiving the heat treatment gas (c) generated in the heat treatment gas generating device (10), and a plurality of hollow nozzle units (14) protruding from the distribution duct (13) between the conveyer belts (2) of the spiral moving unit (3), thereby to inject the heat treatment gas flow toward the food (f) on the conveyer belts (2) arranged below and to form their upper faces (14c) into the supporting faces of rails (15) for supporting the conveyer belts (2) slidably.

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First Claim