Scroll compressor having a back pressure chamber assembly disposed on a fixed scroll plate and an elastic member disposed between a floating plate and a discharge cover

A scroll compressor, comprising:

• a casing comprising a rotational shaft;
• a discharge cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space;
• a first scroll that is revolved by rotation of the rotational shaft;
• a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure of the plurality of compression clambers;
• a back pressure plate that defines a back pressure chamber that accommodates a refrigerant discharged from the intermediate pressure discharge hole;
• a floating plate movably disposed on or at a side of the back pressure plate to define the back pressure chamber together with the back pressure plate;
• and
• an elastic member disposed between the floating plate and the discharge cover to provide an elastic force to the floating plate, wherein the floating plate comprises a rib that protrudes toward the discharge cover and contacts the discharge cover while the refrigerant is compressed, and wherein the elastic member is disposed to surround a circumference of the rib.