| 摘要 |
PURPOSE:To dehydrate a raw material while keeping freshness and color of the raw material, by heating the raw material by the use of a hot oil as a heating medium under reduced pressure and carrying out heating by irradiating the raw material with far infrared rays. CONSTITUTION:An oil as a heating medium is fed to a cooker which is provided with a transparent window for incidence of far infrared rays on the wall face and heated to about 60-120 deg.C. Then, a raw material such as animal meat, fish or shellfish or vegetable or fruit, etc. is fed to the hot oil in the cooker, the cooker is evacuated while keeping the hot oil at the same temperature, the raw material is dehydrated and dried under reduced pressure and the raw material is irradiated with far infrared rays at 0.76-1,000mu wave length from the transparent window while the reduced pressure dehyration and drying treatment is being carried out. |
