Compressor and refrigerator having the same

A refrigerator, comprising:

• a cavity configured to store one or more food items;
• a door configured to open and close at least a portion of the cavity;
• a machine room that is located at a side of the cavity, the machine room defining an air path that allows an inner space of the machine room to communicate with an outside of the machine room;
• a condenser located in the inner space the machine room;
• and
• a compressor located in the inner space of the machine room at a side of the condenser,
• wherein the compressor comprises:
• a shell that defines an enclosed space and that is made of an aluminum material,
• an electric motor unit located in the enclosed space of the shell and configured to generate a driving force, and
• a compression unit located in the enclosed space of the shell and configured to compress refrigerant, the compression unit comprising a cylinder and a piston that is configured to reciprocate in the cylinder based on the driving force transmitted from the electric motor unit, and
• wherein the shell comprises a plurality of heat radiation fins that are located at an outer circumferential surface of the shell and that are configured to emit heat generated inside the shell to an outside of the shell,
• wherein each of the plurality of heat radiation fins includes a horizontal portion and a vertical portion that respectively extend from the outer circumferential surface of the shell, and
• wherein an upper surface of the horizontal portion is disposed at a position corresponding to or below an upper central portion of the shell in an axial direction of the shell, or an outer surface of the vertical portion in a radial direction of the shell is disposed at a position corresponding to or inward of a side central portion of the shell.