Hermetic compressor and refrigerator including the same

A compressor comprising:

• a piston;
• a compression portion configured to compress refrigerant by reciprocation of the piston;
• a motor unit;
• a crank pin;
• a crank shaft comprising:
• a first end portion connected to the motor unit such that the crank shaft is rotatable by the motor unit about a rotation axis;
• and
• a second end portion on which the crank pin is provided, the crank pin being eccentric to the rotation axis;
• and
• a connecting rod connecting the crank pin to the piston to convert crank shaft rotation into piston reciprocation,
• wherein a first opening portion through which lubricant is discharged and a scattering portion that collects and scatters the lubricant discharged through the first opening portion by centrifugal force are provided at the crank pin.

A compressor comprising:

• a piston configured to reciprocate for refrigerant compression;
• a motor unit;
• a crank pin assembly;
• a crank shaft comprising:
• a first end portion connected to the motor unit such that the crank shaft is rotatable by the motor unit about a rotation axis;
• and
• a second end portion on which the crank pin assembly is provided, the crank pin assembly being eccentric to the rotation axis;
• and
• a connecting rod connecting the crank pin to the piston to convert crank shaft rotation into piston reciprocation,
• the crank pin assembly comprising:
• a first opening portion through which lubricant is discharged;
• and
• a scattering portion that collects and scatters the lubricant discharged through the first opening portion.