| 摘要 |
PROBLEM TO BE SOLVED: To provide a microwave heating device wherein a plurality of joint portions joined to microwaves in a heating chamber are connected to one another for the supplied microwaves to be circulated via the heating chamber. SOLUTION: In the heating chamber 10 storing a heated object, there are provided a rotary antenna 18 which is arranged at the approximate center of a bottom wall face 11 for emitting microwaves, the joint portions 21-24 which are provided on a left wall face 12, a right wall face 13 and an upper wall face 14, and wave guide portions 25, 26 which connect the joint portions. Part of microwave energy supplied from the rotary antenna 18 into the heating chamber 10 is approximately circulated via the joint portions to the wave guide portions 25, 26 and the heating chamber 10 to reduce the amount of the microwave energy to be reflected from the heating chamber 10 to the side of a magnetron 16. The microwaves are also supplied from the joint portions into the heating chamber 10, and so the microwaves are supplied from multiple directions to the heated object to hilly efficiently and uniformly heat the heated object. COPYRIGHT: (C)2009,JPO&INPIT
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