Scroll compressor

A scroll compressor comprising:

• a fixed scroll having a fixed wrap;
• an orbiting scroll having an orbiting wrap, the orbiting wrap configured to define first and second compression chambers at an outer side surface and an inner side surface thereof together with the fixed wrap, the orbiting scroll configured to perform an orbiting motion with respect to the fixed scroll;
• a rotation shaft having an eccentric portion at one end thereof, the eccentric portion coupled to the orbiting wrap to overlap with each other in a lateral direction;
• and
• a driving unit configured to drive the rotation shaft,
• wherein the first compression chamber is defined between two contact points P1 and P2 generated by the contact between an inner side surface of the fixed wrap and an outer side surface of the orbiting wrap, and
• wherein 0°<α<360°, where α is an angle defined by two lines which connect a center O of the eccentric portion to the two contact points P1 and P2, respectively.

A scroll compressor comprising:

• a fixed scroll having a fixed wrap;
• an orbiting scroll having an orbiting wrap, the orbiting wrap configured to define first and second compression chambers at an outer side surface and an inner side surface thereof together with the fixed wrap, the orbiting scroll configured to perform an orbiting motion with respect to the fixed scroll;
• a rotation shaft having an eccentric portion at one end thereof, the eccentric portion coupled to the orbiting wrap to overlap with each other in a lateral direction;
• and
• a driving unit configured to drive the rotation shaft,
• wherein a thickness of the fixed wrap is decreased and then increased moving in a direction from P3 to P4, where P3 is an inner contact point of the first compression chamber upon initiating a discharge operation of the first compression chamber, and P4 is an inner contact point of the first compression chamber 150° before initiating the discharge operation of the first compression chamber.

A scroll compressor comprising:

• a fixed scroll having a fixed wrap;
• an orbiting scroll having an orbiting wrap, the orbiting wrap configured to define first and second compression chambers at an outer side surface and an inner side surface thereof together with the fixed wrap, the orbiting scroll configured to perform an orbiting motion with respect to the fixed scroll;
• a rotation shaft having an eccentric portion at one end thereof, the eccentric portion coupled to the orbiting wrap to overlap with each other in a lateral direction;
• a driving unit configured to drive the rotation shaft;
• a rotation shaft coupling portion formed at a central portion of the orbiting scroll, the eccentric portion being coupled to the rotation shaft coupling portion;
• a protruding portion protruding from an inner circumferential surface of an inner end of the fixed wrap;
• and
• a recess portion recessed at an outer circumferential surface of the rotation shaft coupling portion,
• wherein the outer circumferential surface of the rotation shaft coupling portion at the recess portion contacts the protruding portion of the fixed wrap.