Patent ID: 7808366
Filing Date: 2010-10-05
Classification: F25D,G06K

Abstract:
1. A refrigerator comprising: tags attached to goods stored in a storage chamber including a plurality of storage cells; a reader, including a plurality of antennas having different transmission and reception distances, identifying the tags using the antennas; and a control unit detecting locations of the tags attached to goods stored in the storage chamber based on whether the tags are detected by the different transmission and reception distances of the antennas, wherein the antennas correspond to the respective storage cells, and the storage cells are disposed within the transmission and reception distances of the corresponding antennas, and when the stored goods in the storage chamber is searched by the antennas, information of the stored goods is obtained by an antenna having a relatively small transmission and reception distance, information of the stored goods is obtained by another antenna having a relatively large transmission and reception distance, comparison between the information of the stored goods obtained by the antenna having the relative small transmission and reception distance and the information of the stored goods obtained by the antenna having the relatively large transmission and reception distance is made to extract the difference therebetween, and the difference between the information of the stored goods obtained by the antenna having the relative small transmission and reception distance and the information of the stored goods obtained by the antenna having the relatively large transmission and reception distance is determined as information of the goods stored in the storage cell corresponding to the antenna having the relatively large transmission and reception distance.