The present invention relates to a refrigerator, and more particularly, is transparent to the variable relates to a refrigerator including a door inner visible.
According to one embodiment of the invention, the cabinet is a storage compartment provided therein; The illumination device illuminating an inside of the storage chamber; It is provided to be rotatable in the cabinet door having a panel assembly having a front panel open and close the storage compartment and formed with an opening, located at the front; Knock sensor module includes a module for determining whether the microcomputer predetermined knock through the microphone module and the detected sound waves to detect the acoustic wave generated by the knock vibration applied to the door; The module microcomputer and is separately provided with, for receiving the knock-on signal through the module microcomputer, the light passes through the panel assembly to view the storage compartment from outside the door, a control unit for operating the illumination device there is a refrigerator that contains can be provided.