Compressor within motor rotor

A compressor comprising:

• a sealed chamber to which a suction pipe and a discharge pipe are coupled;
• a motor fixed in the sealed chamber and comprising a stator and a rotor for generating rotating force by an electromagnetic interaction between the stator and the rotor;
• a cylinder assembly fixed on an inner circumferential surface of the rotor to be rotated with the rotor, and forming a compression space therein;
• a supporting shaft having ends fixed on inner surfaces of the sealed chamber to support the cylinder assembly such that the cylinder assembly is rotatable on the supporting shaft, a suction passage for supplying fluid into the compression space and a discharge passage for discharging the compressed fluid;
• a cam member fixed on the supporting shaft located in the cylinder assembly, wherein the cam member has a circular profile when viewed from above or below such that an outer periphery of the cam member is in slidable contact with the cylinder around substantially the entire circumference of the cam member;
• and
• at least one vane fixed on the cylinder assembly to be rotated with the cylinder assembly, wherein the at least one vane contacts a surface of the cam member as the cylinder rotates to compress and discharge a fluid through the discharge passage.