Reciprocating compressor having fluid bearing

A reciprocating compressor having a fluid bearing, the reciprocating compressor comprising:

• a reciprocating motor installed in an inner space of a casing, and having a stator and a mover;
• a piston having a piston side bearing surface formed on an outer circumferential surface thereof, wherein a rear end of the piston is coupled to the mover so as to perform a reciprocating motion with the mover;
• a cylinder configured to receive the piston therein, the cylinder having a cylinder side bearing surface formed on an inner circumferential surface thereof;
• a compression space formed between the cylinder and the piston;
• a suction channel that penetrates an end of the piston and extends in a direction corresponding to a reciprocating motion of the piston in the cylinder;
• a suction valve coupled to a front end of the piston and configured to open and close the suction channel;
• a discharge valve coupled to a front end of the cylinder and configured to open and close the compression space;
• a plurality of resonant springs installed at two sides of the piston in the reciprocating direction, wherein the plurality of resonant springs each is implemented as a compression coil spring;
• and
• bearing holes that penetrate the cylinder side bearing surface to guide gas discharged from the compression space to a space between the cylinder side bearing surface and the piston side bearing surface, wherein the bearing holes are arranged in a plurality of rows, wherein, at a position of the piston in the cylinder at which the compression space formed therebetween is maximized, the bearing holes of a row closest to the compression space are positioned between the front end and the rear end of the piston, wherein one or more gas through holes are formed at the piston that penetrate through the piston side bearing surface so as to communicate the bearing holes with the suction channel such that gas introduced between the cylinder and the piston through the bearing holes is introduced into the suction channel, wherein the plurality of rows of the bearing holes is formed with a prescribed interval therebetween, in the reciprocating direction of the piston, wherein the one or more gas through holes are positioned between two immediately neighboring rows of the plurality of rows of the bearing holes to prevent the one or more gas through holes from being aligned with any of the plurality of rows of the bearing holes when the piston performs the reciprocating motion within the cylinder, wherein an interval from a rear end of the cylinder to a neighboring row of the bearing holes, which is positioned closest to the rear end of the cylinder, is less than an interval from the front end of the cylinder to a neighboring row of the bearing holes, which is positioned closest to the front end of the cylinder, wherein, at a position of the piston in the cylinder at which the compression space is minimized, the piston side bearing surface being divided into a front region, intermediate region, and a rear region in a lengthwise direction of the piston relative to the compression space, wherein a first interval between a first row of the bearing holes formed within the front region and a second row of the bearing holes formed within the intermediate region, the second row immediately neighboring the first row, is less than a second interval between the second row of the bearing holes and a third row of the bearing holes formed within the intermediate region, the third row immediately neighboring the second row, and wherein a third interval between a fourth row of the bearing holes formed within the rear region and the third row of the bearing holes formed within the intermediate region, the fourth row immediately neighboring the third row, is less than the second interval.