Rotary compressor with first and second main suction ports

A rotary compressor comprising:

• a casing forming an outer shape;
• and
• a cylinder having an internal space, disposed inside the casing and comprising:
• a rolling piston configured to rotate eccentrically in the internal space,
• a vane configured to contact the rolling piston and divide the internal space into a suction chamber and a compression chamber, and
• a main suction port connecting an outside and the suction chamber,
• wherein the main suction port comprises:
• a first main suction port disposed at an outer circumferential surface of the cylinder and has a first cross-sectional area;
• and
• a second main suction port disposed at an inner circumferential surface of the cylinder, connected to the first main suction port, and has a second cross-sectional area smaller than the first cross-sectional area,
• wherein the first and the second main suction ports each have a constant diameter in their cross-section;
• wherein the first main suction port has a circular shape, and
• wherein the second main suction port has an elliptical shape in which a cross section has a short axis disposed in a rotational direction of the rolling piston.

A home appliance for adjusting temperature through heat exchange with an outside using a refrigerant, the home appliance comprises:

• a rotary compressor configured to compress the refrigerant, and including:
• a casing forming an outer shape,
• a cylinder having an internal space, disposed inside the casing and comprising a rolling piston configured to rotate eccentrically in the internal space,
• a vane configured to contact the rolling piston and divide the internal space into a suction chamber and a compression chamber,
• a main suction port connecting the suction chamber to an outside of the cylinder,
• a first flange disposed at an upper portion of the cylinder,
• a second flange disposed at a lower portion of the cylinder,
• wherein the main suction port includes a sub suction port extending in a direction in which at least one of the first flange and the second flange is disposed;
• a first main suction port disposed at an outer circumferential surface of the cylinder and has a first cross-sectional area;
• and
• a second main suction port disposed at an inner circumferential surface of the cylinder, connected to the first main suction port, and has a second cross-sectional area smaller than the first cross-sectional area;
• and
• wherein the first and the second main suction ports each have a constant diameter in their cross-sections,
• wherein at least one of the first flange and the second flange include a flow path groove connecting the sub suction port to the suction chamber,
• wherein the first main suction port has a circular shape, and
• wherein the second main suction port has an elliptical shape in which a cross section has a short axis disposed is a rotational direction of the rolling piston.