| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a network household electrical appliance system for combining correct time information with operation history information of a household electrical appliance and storing the combined information, and for improving reliability of the operation history information of the household electrical appliance by applying correct time even to operation history since power supply to the household electrical appliance is performed until the accurate time is obtained. Ž<P>SOLUTION: The network household electrical appliance system includes: a household electrical appliance 1; a household electrical appliance control gateway 2 connected to the household electrical appliance 1 for providing external time information obtained through a network 5 to the household electrical appliance 1; a time server 3 for providing time information to the household electrical appliance control gateway 2; and an external server 4 for receiving the provision of information showing power supply frequency from the household electrical appliance control gateway 2 to the household electrical appliance 1, appliance unique time information generated by the household electrical appliance 1, external time information provided by the household electrical appliance control gateway 2, and the operation history information of the household electrical appliance 1 stored so as to be associated with the power supply frequency information, the equipment unique time information and the external time information, and for managing the pieces of information. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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