Vane rotary compressor

A compressor, comprising:

• a cylinder including:
• an inner circumferential surface defining an internal cavity,
• an inlet port, and
• an outlet port;
• and
• a roller provided to rotate in the internal cavity of the cylinder and including:
• an outer circumferential surface having a region that is positioned within a threshold distance of the inner circumferential surface of the cylinder during the rotation of the roller to define a contact point,
• a plurality of vane slots that are each formed to have one end opened toward the outer circumferential surface, and
• a plurality of vanes slidably inserted, respectively, into the vane slots of the roller, the vanes selectively protruding toward the inner circumferential surface of the cylinder so as to divide a compression space between the cylinder and the roller into a plurality of compression chambers,
• wherein a surface contact region is provided on at least one of the outer circumferential surface of the roller or the inner circumferential surface of the cylinder and is maintained within a preset section that extends in a circumferential direction between the cylinder and the roller and includes the contact point, and
• wherein a recess is formed on the inner circumferential surface of the cylinder as a recessed dimple, and wherein the recess is formed so that a circumferential linear length from an end of the recess to an end of the surface contact region in a rotation direction of the roller is equal to or greater than a lateral thickness of the vane.