Rotary-type compressor

An air conditioner comprising:

• a rotary-type compressor including:
• a housing;
• a drive motor provided inside the housing, and provided with a stator and a rotor;
• and a compression unit configured to compress a refrigerant by being driven by the drive motor, the compression unit including:
• a plurality of cylinders, each of which is provided with an operation chamber to compress the refrigerant therein;
• a plurality of suction passages to bring the refrigerant into the plurality of cylinders, respectively;
• and a communication passage configured to communicate a first of the plurality of suction passages with a second of the plurality of suction passages, the communication passage being upstream of the operation chambers, a first end of the communication passage terminating at the first of the plurality of suction passages, a second end of the communication passage terminating at the second of the plurality of suction passages, wherein a diameter of the first end of the communication passage and a diameter of the second end of the communication passage are equal to a diameter of the first of the plurality of suction passages and of the second of the plurality of suction passages, respectively, wherein the operation chambers provided in each of the plurality of cylinders are configured to have different volumes, and wherein a balancer to maintain dynamic balance is provided in a lower side of the rotor.