The invention and the lower duct is formed with a passage through which air flows into one side of the lower duct communication and , with the other end to the upper duct in the storage chamber is formed so that the communication path is , the lower duct is formed at the hook portion or the groove , wherein the upper duct has for refrigerators , characterized in that the other one is formed in the hooking portion or groove relates to the duct structure . ; 展开▼