Abstract: The display panel is used as the host computer in the refrigerator control system, and its operating system stores the logic control program; the control panel is used as the slave computer, which is responsible for the load drive; the display panel and the main control panel need continuous communication, and the display panel drives the control panel to control the refrigerator by sending communication data, so the communication system is the key factor to ensure the reliability of data transmission and control. Through the design of the communication system of the refrigerator, the communication protocol including guide code, communication head code, state data, control command, check code and end level is defined, which makes the communication process accurate and convenient.

Key words: Refrigerator, Main control board, Display board, Communication system