Rotary compressor with selective oil communication

A rotary compressor comprising:

• a cylinder including a compression space;
• a roller configured to compress a refrigerant in the cylinder;
• a vane engaged with the roller;
• a vane slot defined at the cylinder, wherein the vane is at least partially inserted into the vane slot and linearly movable along the vane slot;
• a sidewall path defined at an inner wall of the cylinder that faces the vane slot, the sidewall path facing a surface of the vane that is inserted into the vane slot,
• a first member that covers a first side of the cylinder in an axial direction;
• and
• a second member that covers a second side of the cylinder that is opposite to the first side in the axial direction,
• wherein the vane includes a communication part configured to,
• based on a first location of the vane relative to the vane slot, permit fluidic communication between the vane slot and an oil space that receives oil, and
• based on a second location of the vane relative to the vane slot, permit fluidic communication between the compression space and the oil space,
• wherein the communication part includes an oil supply groove defined at the vane, and the oil supply groove extends in a first direction that the vane moves along the vane slot, and
• wherein the oil supply groove and the sidewall path are configured to be fluidly separated from each other based on the vane being located at a first vane position in which the oil supply groove is located to at least partially extend beyond a periphery of each of the first member and the second member.