Scroll compressor and air conditioner including the same

An air conditioner comprising:

• a scroll compressor to compress a refrigerant;
• a condenser to condense the refrigerant compressed in the scroll compressor;
• a second injection passage to bypass at least one portion of the refrigerant discharged from the condenser and introduce the at least one portion of the refrigerant into the scroll compressor;
• a first injection passage to introduce a refrigerant having a pressure less than that of the at least one portion of the refrigerant within the second injection passage into the scroll compressor;
• an expansion device to decompress the refrigerant discharged from the condenser;
• an evaporator to evaporate the refrigerant decompressed by the expansion device;
• and
• a plurality of overcooling devices for overcooling the refrigerant passing through the condenser and including a first overcooling device heat-exchanged with the refrigerant within the first injection passage and a second overcooling device heat-exchanged with the refrigerant within the second injection passage,
• wherein the scroll compressor comprises:
• a refrigerant suction part through which the refrigerant passing through the evaporator is received;
• a first injection part and a second injection part connected to the first injection passage and the second injection passage, respectively;
• and
• an orbiting scroll wrap orbitably disposed to cover at least one of the refrigerant suction part, the first injection passage, and the second injection passage, the orbiting scroll wrap moving such that the first injection part is opened to introduce the refrigerant before the receipt of the refrigerant through the refrigerant suction part is completed.

A scroll compressor comprising:

• a fixed scroll comprising a first wrap;
• an orbiting scroll disposed to have a phase difference with respect to the fixed scroll, the orbiting scroll comprising a second wrap defining a compression chamber together with the first wrap;
• a suction part to receive a first refrigerant into the compressor chamber;
• a driving shaft to transmit a rotation force to the orbiting scroll;
• a first injection part disposed in one position of the fixed scroll to introduce a second refrigerant into the compression chamber, the opening of the first injection part starting before the suction part is opened and then covered by the second wrap;
• and
• a second injection part disposed in another position of the fixed scroll to introduce a third refrigerant into the compression chamber,
• wherein the second wrap is disposed on the orbiting scroll such that the first injection part is opened to introduce the second refrigerant before the receipt of the first refrigerant through the suction part is completed during the orbiting of the orbiting scroll, and
• wherein, when the driving shaft has a rotation angle of about 0° at a time point at which the receipt of the refrigerant through the suction part is completed, the second wrap is arranged such that the opening of the first injection part starts when the driving shaft has a rotation angle of about −10° to about −30°.

A scroll compressor comprising:

• a fixed scroll comprising a first wrap;
• an orbiting scroll disposed to have a phase difference with respect to the fixed scroll, the orbiting scroll comprising a second wrap defining a compression chamber together with the first wrap;
• a suction part to receive a first refrigerant into the compressor chamber;
• a driving shaft to transmit a rotation force to the orbiting scroll;
• a first injection part disposed in one position of the fixed scroll to introduce a second refrigerant into the compression chamber, the opening of the first injection part starting before the suction part is opened and then covered by the second wrap;
• and
• a second injection part disposed in another position of the fixed scroll to introduce a third refrigerant into the compression chamber,
• wherein the second wrap is disposed on the orbiting scroll such that the first injection part is opened to introduce the second refrigerant before the receipt of the first refrigerant through the suction part is completed during the orbiting of the orbiting scroll, and
• wherein, when the driving shaft is further rotated by an angle of about 180° after the opening of the first injection part starts, the second wrap is arranged such that the opening of the second injection part starts.