Scroll compressor with a bypass

A scroll compressor, comprising:

• a casing comprising a suction space and a discharge space;
• a first scroll that forms a suction chamber, an intermediate pressure chamber, and a discharge chamber together with a second scroll;
• a bypass hole and a bypass valve configured to discharge an operation fluid outside of the second scroll when pressure of the intermediate pressure chamber is higher than a discharge pressure;
• a discharge path that communicates with the discharge space;
• and
• a back pressure plate configured to introduce the discharged operation fluid to the discharge path, wherein the discharged operation fluid flows between facing surfaces of the second scroll and the back pressure plate, to thus reach the discharge path.

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 performing an orbital motion with respect to a rotational shaft thereof in operation;
• a second scroll that forms 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 and comprising a bypass hole that communicates with the intermediate pressure chamber;
• a back pressure chamber assembly coupled to the second scroll, the back pressure chamber assembly comprising a back pressure plate and a floating plate and being configured to press the second scroll toward the first scroll, the back pressure chamber assembly further having a discharge path by which the discharge chamber and the discharge space with communicate with each other;
• and
• a bypass valve that opens and closes the bypass hole, wherein the back pressure plate comprises a back pressure cavity formed by inner and outer circumferential walls, and wherein the bypass hole is formed in the second scroll at a position outwardly spaced from the inner circumferential wall in a radial direction.