| 摘要 |
<p>An infrared heating unit (30) is provided with a heating element (32) radiating an electromagnetic wave containing infrared when heated, rotatable around a rotation axis (R) and shaped in such a way that, when viewed from underneath in a direction orthogonal to the rotation axis (R), the apparent radiation surface area of the electromagnetic wave varies according to the rotation. In addition, when the heating element (32) is viewed in a cross-section orthogonal to the rotation axis (R), the electromagnetic wave radiation surface is elliptically shaped. In addition, the infrared heating unit (30) is provided with infrared-absorbing plates (70,75) capable of absorbing, among the electromagnetic wave, at least a portion of the infrared radiated from the heating element (32) in a direction other than a direction orthogonal to the rotation axis (R) and downward. Further, the infrared-absorbing plates (70,75) are capable of absorbing, among the electromagnetic wave, at least a portion of the infrared radiated from the heating element (32) in an orthogonal direction (= front-back direction) to the direction orthogonal to the rotation axis (R) and downward.</p> |
