Refrigerator and a control method

A refrigerator, comprising:

• one or more storage compartments, configured to store foods, wherein the foods are able to be identified by radio frequency identification (RFID) tags;
• one or more doors corresponding to the one or more storage compartments, provided at one or more openings for the one or more storage compartments;
• one or more RFID detection circuits in the one or more storage compartments, configured to detect signals from the RFID tags;
• a display panel at one of the one or more doors;
• and
• a controller in communication with the display panel, configured to:
• in response to that the one or more doors are all detected to be closed, obtain a first set of information, wherein the first set of information comprises identity information of each RFID tag in the one or more storage compartments;
• determine, by comparing the first set of information with a second set of information, one or more target tags from among the RFID tags placed in a first storage compartment of the one or more storage compartments, and determine one or more target placement times corresponding to the one or more target tags according to a current time of the refrigerator, wherein the second set of information is a set of information generated according to identity information of each RFID tag in the one or more storage compartments obtained in response to that the one or more doors are detected to be closed last time;
• and
• display, on the display panel, a freshness indicator of one or more foods identified by the one or more target tags and placed in the first storage compartment, wherein the freshness indicator is generated according to the one or more target placement times corresponding to the one or more target tags,
• wherein the controller is further configured to:
• in response to an instruction for identifying an RFID tag from a user, obtain a tag code of the RFID tag for identifying, the tag code comprising a first code portion;
• determine whether the first code portion is a predetermined code;
• in response to the first code portion being the predetermined code,
• display a first association interface on the display panel to receive first food information that is input from the user,
• upon receiving the first food information from the user, associate the first food information with the RFID tag having the tag code, and
• store the associated first food information and the RFID tag having the tag code;
• and
• in response to the first code portion not being the predetermined code,
• obtain second food information for the RFID tag having the tag code according to the first code portion from a local memory,
• display the second food information on a second association interface on the display panel, the second association interface being configured unable to receive food information input from the user;
• and
• associate the second food information with the RFID tag having the tag code.