| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem wherein an impedance of each antenna is required to be severely regulated so that a detection area of each antenna is not spread over a plurality of storage chambers, although one or more of the antennas are provided in each storage chamber to specify the position thereof based on the antenna communicated with a radio tag. SOLUTION: The refrigerator can determine door opening and closing by a temperature elevation determining part 31, using a temperature change of a temperature sensor 5 arranged within each storage chamber, without providing physically a door opening and closing switch in every storage chamber, can specify the storage chamber storing a food or an article attached with an IC tag 11, even when detecting the IC tags 11 in the plurality of storage chambers by one electric power supply antenna 8, and can manage an inventory separately in each storage chamber. COPYRIGHT: (C)2010,JPO&INPIT
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