| 摘要 |
PURPOSE:To make the temperature distribution in a cooking area uniform by providing in the inside of a main body a steam supply device in the cooking area, temperature sensor, and temperature control device and providing a steam supply pipe which is provided with a plurality of steam supply holes at the lower section of the cooking area. CONSTITUTION:Steam supply holes 14A are constituted so as to have their total area sufficiently large for the supply amount of steam and the jetting speed of steam 17 is set as low as possible, and, further, because the direction of its jetting is horizontal or downwards, the steam 17 not only mixes with the air 18 and diffuses into it but also is replaced with the air 18 in the cooking area 2 slowly due to the difference of specific gravity with natural convection accompanied. Accordingly the temperature distribution in the cooking area becomes uniform. Now, if steam is supplied so as to make the volume ratio of the steam about 70%, the temperature T1=90 deg.C is held. The temperature of the mixture gas 19 in the cooking area 2 rises with the increase in the volume ratio of saturated steam, and the steam 1 that was consumed for heating of food 12 becomes drain water 9 and stays in a drain receiver 8.
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