Reciprocating compressor having a gas bearing

A reciprocating compressor comprising:

• a cylinder;
• a piston inserted into the cylinder to define a space for compression, the piston having a suction passage configured to communicate with the space;
• and
• a bearing having at least one bearing hole passing through the cylinder to allow a refrigerant to be injected between the cylinder and the piston,
• wherein a flow resistor is disposed on a side of the cylinder, the flow resistor being configured to restrict a flow of the refrigerant flowing toward or in the bearing hole,
• wherein the bearing hole includes a guide groove on an outer circumferential surface of the cylinder in a circumferential direction, and at least one nozzle extending from the guide groove to an inner circumferential surface of the cylinder, and
• wherein the guide groove has a greater cross-sectional area than the at least one nozzle.