Refrigerator

A refrigerator comprising:

• a cabinet having a storage chamber;
• and
• a door configured to open and close at least a portion of the storage chamber,
• wherein the door comprises:
• a panel assembly comprising:
• a front panel that is made of glass and defines a front surface of the door,
• a rear panel made of glass and spaced apart from the front panel, the rear panel defining a rear surface of the door, and
• a rod that is disposed between the front panel and the rear panel and defines a sealed space between the front panel and the rear panel,
• a side frame that is coupled to the front panel and defines a side surface of the door,
• an upper frame that is coupled to the side frame and defines an upper surface of the door,
• a lower frame that is coupled to the side frame and defines a lower surface of the door,
• a door liner that has a rectangular frame shape and is coupled to the upper frame, the lower frame, the side frame, and the rear panel, and
• an insulator provided in a foaming space that is defined by the panel assembly, the upper frame, the lower frame, and the side frame,
• wherein at least one of the upper frame or the lower frame comprises:
• a main part that defines a horizontal exterior of the door,
• a front surface portion that extends vertically from the main part and is disposed on the front panel, and
• a front protruding portion that extends forward from the main part and is seated on the front panel, and
• wherein the main part defines a contraction prevention groove that is depressed and extends along the main part in a longitudinal direction of the main part parallel to the front panel, wherein the contraction prevention groove is disposed between the main part and the front protruding portion.