PROBLEM TO BE SOLVED: To suppress generation of product failure due to contamination of a heat carrier or untreated products, in a heat exchanger of a product heat treatment device.SOLUTION: In a product heat treatment device 10 having heat exchanger A, pressing means D and a pressure control part 21, the heat exchanger A has a product flow channel which flows a product to be heated or a product after the heat treatment and a heat carrier flow channel C which flows the heat carrier exchanging heat with the product, the pressing means D injects the product or gas to the product flow channel B or a piping connected to the product flow channel B, the pressure control part 21 increases pressure of the product flow channel B of the heat exchanger A by operating the pressing means D when the flow or the product by the product flow channel B is stopped in the heat exchanger A.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】製品熱処理装置の熱交換器における、熱媒体または未処理製品の混入による製品不良の発生を抑制する。【解決手段】熱交換器Aと加圧手段Dと圧力制御部21とを有する製品熱処理装置10において、熱交換器Aは、加熱される製品または熱処理後の製品が通流する製品通流路Bと、製品と熱交換する熱媒体が通流する熱媒体通流路Cとを有し、加圧手段Dは、製品通流路Bまたは製品通流路Bに接続される配管に対して製品または気体を注入し、圧力制御部21は、熱交換器Aにて製品通流路Bにおける製品の通流が停止している際に、加圧手段Dを動作させて熱交換器Aの製品通流路Bの圧力を増加させる。【選択図】図4
