| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem on degradation of temperature detection accuracy of an infrared ray sensor caused by the fluctuation of an ambient temperature of the infrared ray sensor caused by accumulation of warm air in a recessed section of a ceiling surface in rising the steam from hot food and warm air accumulated in a case. SOLUTION: As the circumference of the infrared ray sensor 13 is surrounded by an infrared ray collecting member 48 having high heat conductivity, the influence of disturbance caused by fluctuation of the ambient temperature of the infrared ray sensor 13 (for example, temperature fluctuation by door opening/closing and hot food), is absorbed by the infrared ray collecting member 48, thus the temperatures of the infrared ray sensor and the infrared ray collecting member are equalized, the temperature fluctuation around the infrared ray sensor 13 is suppressed, and the detection accuracy of the infrared ray sensor 13 is improved. COPYRIGHT: (C)2010,JPO&INPIT
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