Reciprocating compressor

A reciprocating compressor comprising:

• a shell;
• a driving motor arranged in an internal space of the shell;
• a driving shaft coupled to a rotor of the driving motor;
• a piston coupled to the driving shaft to reciprocate;
• a cylinder having the piston reciprocatably inserted thereinto to form a compression chamber together with the piston;
• and
• a suction muffler comprising a muffler entrance opening toward the internal space of the shell, a muffler exit opening toward a suction side of the compression chamber, a noise-reducing space located between the muffler entrance and the muffler exit, and a suction flow path connecting between the muffler entrance and the muffler exit with the noise-reducing space interposed therebetween,
• wherein the muffler entrance comprises:
• a suction port connected to the suction flow path;
• and
• a refrigerant collection portion located between the internal space of the shell and the suction port, and
• wherein the refrigerant collection portion is recessed by a predetermined depth toward an inner surface facing the driving motor from an outer surface facing an inner circumferential surface of the shell.