Scroll compressor with back pressure discharge

A scroll compressor, comprising:

• a casing comprising a suction space and a discharge space;
• a first scroll, and a second scroll that forms a suction chamber, an intermediate pressure chamber, and a discharge chamber together with the first scroll;
• a back pressure chamber assembly comprising a back pressure plate and a floating plate that together form a back pressure chamber, the back pressure chamber assembly pressing the second scroll toward the first scroll;
• and
• a check valve configured to discharge an operation fluid inside the back pressure chamber to the discharge space when a pressure inside the back pressure chamber is higher than a pressure of the discharge space through a back pressure discharge path formed between facing surfaces of the back pressure chamber assembly and 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 having a first wrap and 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 comprising a second wrap 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 the second scroll comprising a first ring-shaped wall and a second ring-shaped wall that form a back pressure chamber into which a portion of an operation fluid inside the intermediate pressure chamber is received;
• a floating plate installed between the first ring-shaped wall and the second ring-shaped wall, the floating plate sealing the back pressure chamber, wherein a discharge path to introduce the operation fluid discharged from the discharge chamber to the discharge space is formed in the first ring-shaped wall, and wherein a back pressure discharge path penetrates a portion of the second scroll, the back pressure chamber and the discharge path communicating via the back pressure discharge path;
• and
• a check valve installed on the discharge path, the check valve being configured to prevent the operation fluid from being introduced into the back pressure chamber from the discharge path.