Scroll compressor with back pressure chamber

A scroll compressor, comprising:

• a casing comprising a suction space and a discharge space;
• a first scroll configured to perform an orbital motion in operation;
• a second scroll movable within a limited range in the suction space with respect to the first scroll;
• and
• a back pressure chamber assembly comprising a back pressure plate and a floating plate, the back pressure chamber assembly being configured to press the second scroll toward the first scroll, wherein the back pressure plate is formed of a material different from the second scroll.

A scroll compressor, comprising:

• a casing;
• a discharge cover, the discharge cover dividing an inner space of the casing into a suction space and a discharge space;
• a main frame, the main frame being spaced apart from the discharge cover;
• a first scroll supported by the main frame, the first scroll being configured to perform an orbital motion with respect to a rotational shaft in operation;
• a second scroll forming a suction chamber, an intermediate pressure chamber, and a discharge chamber together with the first scroll, the second scroll being movable with respect to the first scroll;
• a back pressure plate fastened to the second scroll by at least one fastener, the back pressure plate having a hole configured to receive the at least one fastener, and comprising a cavity with which the intermediate pressure chamber of the second scroll communicates;
• and
• a floating plate movably coupled to the back pressure plate so as to seal an upper portion of the cavity.