| 摘要 |
PURPOSE: To perform a uniform heating process over a wider range with an electromagnetic wave heating device capable of performing heating using the principle that strong field exists at a front positionλ/4 apart from a short plate in a waveguide. CONSTITUTION: A plurality of waveguides 1 and 2 with rectangular cross section and each one side closed with a short plate 7 are stacked, so as to keep the long sides of the rectangular form superposed. Also, a nonmetal tube 3 for flowing a heating object is laid through the waveguides 1 and 2 along a direction vertical to a plane including the long sides. Furthermore, the other sides of the waveguides 1 and 2 without any short plate 7 are connected to electromagnetic wave generators 4 and 4 respectively. In this case, a zone M to give maximum field strength is at a position away from the short plate 7 by 1/4 of the waveguide wavelength of the frequency of an applied electromagnetic wave. According to this construction, a plurality of the zones M to give the maximum field strength can be set along a direction across a transport route 3. Thus, the diameter of the tube 3 can be enlarged to increase a process rate and apply uniform heat. In this case, the waveguide may be laid by a plurality of numbers or one waveguide may be branched. Also, uniform heat can be applied over a wider range, when the waveguide is expanded like a tapered form.
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