Scroll compressor

A scroll compressor, comprising:

• a casing;
• an electric motor drive provided within the casing to generate a rotational force;
• a compression device comprising a main frame disposed at a lower portion of the electric motor drive, and mounted on an inner side wall of the casing, a fixed scroll coupled to the main frame at a lower portion of the main frame, and an orbiting scroll configured to form with the fixed scroll a plurality of compression chambers provided between the fixed scroll and the main frame so as to move in engagement with the fixed scroll;
• an oil storage space located at a lower side of the compression device within the casing;
• a first space and a second space located at an upper side of the compression device within the casing, wherein the refrigerant compressed in the compression device is discharged into the first space and the second space, and wherein the main frame comprises:
• a plurality of oil discharge paths recessed on an outer circumferential surface of the main frame, that extends from an upper portion communicating with the second space to a lower portion communicating with the oil storage space thereof, and disposed to be separated from each other along a circumference of the main frame to discharge oil accumulated at an upper portion of the main frame to the oil storage space;
• and
• a plurality of mounting portions formed between the plurality of oil discharge paths, and coupled to the inner side wall of the casing, wherein any one cross-sectional area of the plurality of mounting portions is larger than any one cross-sectional area of the plurality of oil discharge paths formed at both sides thereof.

A compressor, comprising:

• a casing having a discharge pipe through which a refrigerant is discharged and an oil storage space that stores oil;
• a drive coupled to an inner circumferential surface of the casing to rotate a rotational shaft;
• a compression unit coupled to the rotational shaft and provided to compress the refrigerant, the compression unit being supplied with the oil, wherein the compression unit comprises:
• a discharge hole that discharges the compressed refrigerant;
• and
• one or more oil discharge path formed by recessing at least a portion of an outer circumferential surface of the compression unit to allow the supplied oil to move into the oil storage space, wherein the drive includes:
• a stator coupled to the casing;
• and
• a rotor that rotates the rotational shaft on an inner circumferential surface of the stator, wherein the stator includes a groove provided on an outer circumferential surface thereof to face the one or more oil discharge path, wherein the one or more oil discharge path is formed within a region offset from the outer circumferential surface of the compression unit, wherein the compression unit further includes at least one first passage groove on a surface thereof facing the drive, and wherein the at least one first passage groove is provided along the outer circumferential surface of the compression unit.