Scroll compressor having enhanced discharge structure

A compressor comprising:

• a case;
• a driving motor coupled to the case;
• a rotary shaft coupled to the driving motor;
• a main frame coupled to the case, wherein the rotary shaft passes through the main frame;
• a fixed scroll including (i) a fixed end plate portion that is coupled to the case and faces the main frame and (ii) a fixed wrap protruding from the fixed end plate portion;
• an orbiting scroll including (i) an orbiting end plate portion accommodated between the main frame and the fixed scroll, (ii) an orbiting wrap that protrudes from the orbiting end plate portion and faces the fixed wrap, and (iii) a center portion that extends from the orbiting wrap and accommodates at least a portion of an outer surface of the rotary shaft,
• wherein the center portion of the orbiting scroll rotatably supports the outer surface of the rotary shaft and defines a groove that is recessed toward the driving motor relative to an end surface of the orbiting wrap facing the fixed end plate portion,
• wherein the center portion has an inner peripheral surface defining a hole that accommodates the rotary shaft, and
• wherein the groove is recessed from an outer peripheral surface of the center portion toward the hole, and a circumference of the groove is spaced apart from the inner peripheral surface of the center portion.