RECIPROCATING COMPRESSOR AND METHOD FOR DRIVING SAME

摘要

The present disclosure relates to reciprocating compressor. The present invention can prevent friction loss or abrasion between a cylinder and a piston, which is caused when a hydraulic bearing is blocked with a foreign substance, by preventing the foreign substance mixed in refrigerant gas from flowing into the hydraulic bearing, and can improve compressor performance by preventing a specific volume in a compression space from increasing when high-temperature refrigerant gas discharged in the compression space is cooled, such that vibration noise of the compressor can be reduced since a gas guiding part offsets vibration and the noise generated when a refrigerant is discharged in the compression space. Furthermore, the number of vibrations of a mover is increased and a driving operation for removing foreign substances is carried out to increase the number of vibrations of a cylinder such that any foreign substance stuck in a gas hole can be cleaned, thereby increasing performance and reliability of the compressor.

主权项

1. A reciprocating compressor comprising:
a casing having an inner space communicating with a suction pipe; a frame provided in the inner space of the casing; a reciprocating motor coupled to the frame, and having a mover, the mover performing a linear reciprocating motion; a cylinder coupled to the frame and having a compression space; a piston inserted into the cylinder to perform a reciprocating motion, the piston having a suction passage formed therethrough in a lengthwise direction to guide a refrigerant into the compression space; a suction valve coupled to an end surface of the piston and configured to open and close the suction passage; a discharge valve provided at an end surface of the cylinder and configured to open and close the compression space; a discharge cover installed at an end side of the cylinder and having a discharge space accommodating the discharge valve therein, the discharge space communicating with a discharge pipe; a gas bearing having a plurality of gas holes penetratingly formed from the end surface to an inner circumferential surface of the cylinder, the plurality of gas holes configured to inject therethrough a part of a refrigerant, discharged from the compression space into the discharge space, into a portion between the cylinder and the piston so as to support the piston with respect to the cylinder; and a block-preventing unit configured to prevent the gas holes of the fluid gas bearing from being blocked due to foreign materials.