Rotary compressor

A compressor, comprising:

• a casing;
• a drive motor provided in an inner space of the casing;
• a rotating shaft configured to transfer a rotational force of the drive motor;
• a roller provided on the rotating shaft to rotate, and allow at least two or more portions of an outer circumferential surface thereof to face an inner circumferential surface of the cylinder to form at least two compression spaces in the cylinder;
• and
• at least two or more vanes configured to face an outer circumferential surface of the roller to partition the two or more compression spaces into a suction chamber and a compression chamber, respectively,
• wherein at least two or more vane slots having an inner surface are formed in the cylinder to face both side surfaces of the vane, and
• a back pressure space is formed between the vane slot and a side surface of a vane corresponding thereto, and
• a volume of the back pressure space varies according to the movement of the vane.

A compressor, comprising:

• a casing;
• a cylinder provided in an inner space of the casing;
• a roller configured to concentrically rotate with the cylinder within the cylinder to form at least two or more compression spaces in the cylinder;
• and
• two or more vanes configured to face an outer circumferential surface of the roller to be slidably coupled to the cylinder to partition the two or more compression spaces into a suction chamber and a compression chamber, respectively,
• wherein a space in which a volume thereof varies according to the movement of the vane is formed between on side surface of the vane and a cylinder corresponding thereto.