Rotary compressor having fluid passage between sliding vane and vane slot

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 a movement of the vane is formed between one side surface of the vane and the cylinder corresponding thereto, wherein a slot side step stepped by a predetermined length in an outer circumferential side from an inner circumferential end of the vane slot is formed on a side surface of the vane slot, and a vane side step stepped in an opposite direction to the slot side step is formed on a side surface of the vane corresponding to the slot side step, wherein a vane side communication groove is formed on the side surface of the vane, and a slot side communication groove is formed in the cylinder to selectively provide communication between the vane side communication groove and the space according to the movement of the vane, wherein a vane side sealing portion that faces the vane slot to secure a sealing area is formed at a front side of the vane side step, and the vane side communication groove is formed on the vane side sealing portion, and wherein the slot side communication groove Us formed within the slot side step.