Scroll compressor having a back pressure plate and a gasket coupled to a fixed scroll plate by at least one coupling member

A scroll compressor, comprising

• a casing comprising a rotational shaft;
• a discharge cover fixed inside of the casing to partition an 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 chambers;
• 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 the back pressure plate to define the back pressure chamber together with the back pressure plate and including an intermediate pressure suction hole;
• a gasket disposed between the back pressure plate and the second scroll and having an intermediate pressure communication hole that allows the intermediate pressure discharge hole to communicate with the intermediate pressure suction hole, wherein the gasket blocks communication between the back pressure chamber and the suction and discharge spaces;
• and
• at least one coupling member to couple the back pressure plate and the gasket to the second scroll, wherein the gasket comprises a gasket body having an inner circumferential surface and an outer circumferential surface, wherein the intermediate pressure communication hole and at least one coupling hole, to which the at least one coupling member is coupled, are defined between the inner circumferential surface and the outer circumferential surface, and wherein the at least one coupling hole comprises a plurality of coupling holes defined in the gasket body, and when a distance between two coupling holes adjacent to each other of the plurality of coupling holes is defined as a pitch, the intermediate pressure communication hole is disposed between first and second coupling holes, which have a shortest pitch therebeween.