Compressor

A compressor comprising:

• a case;
• a compression unit that is provided inside the case and that includes a cylinder and a piston configured to reciprocate inside the cylinder to compress refrigerant;
• a driving unit that includes a stator disposed inside the case and a plurality of permanent magnets configured to reciprocate with respect to the stator and that is configured to provide a driving force to the compression unit;
• and
• a resonator that is configured to reduce noises generated while the compression unit is operated, that is disposed between the compression unit and an inner surface of the case facing the compression unit in an axial direction, and that is spaced apart from the compression unit,
• wherein the compression unit comprises a discharge cover surrounding a discharge port configured to discharge the compressed refrigerant from the cylinder,
• wherein the compressor further comprises (i) a loop pipe that is connected to the discharge cover and (ii) a discharge pipe that is in fluid communication with one end portion of the loop pipe,
• wherein the resonator is spaced apart from the compression unit and coupled to an inner wall of a first end portion of the case by a fixing member,
• wherein the resonator comprises:
• a body defining a cavity therein,
• a hole that is defined at the body and that is in fluid communication with the cavity, the hole being defined at a side of the body facing the compression unit in the axial direction, and
• a recess portion that is recessed to accommodate a region of an end portion of the discharge cover, and
• wherein the body is disposed along a circumferential direction of the recess portion.