Abstract: A scroll compressor includes fixed and orbiting scrolls. The fixed scroll includes a fixed scroll end plate and a spiral fixed wrap extending from the end plate. The orbiting scroll includes an orbiting scroll end plate and an orbiting wrap extending from the end plate and engaging with the fixed wrap to form compression chambers. The fixed wrap includes a first fixed wrap portion on a radially outer side and a second fixed wrap portion on a radially inner side. The first fixed wrap portion is periodically covered by the orbiting scroll end plate and the second fixed wrap portion is always covered by the orbiting scroll end plate while the scroll compressor is operating. A sealing member is provided on one of the first fixed wrap portion and a first covering portion of the orbiting scroll end plate corresponding to the first fixed wrap portion.

Abstract: A scroll compressor is provided, comprising: a compression mechanism comprising a non-orbiting scroll member and an orbiting scroll member, wherein the orbiting scroll member is axially displaceable between an engagement position and a disengagement position; a main bearing housing adapted to support the compression mechanism; a back pressure chamber formed between the orbiting scroll member and the main bearing housing, wherein the back pressure chamber is in communication with at least one of the compression chambers via a communication passage provided in the orbiting scroll member or the non-orbiting scroll member and is adapted to apply a back pressure to the orbiting scroll member to bias the orbiting scroll member toward the engagement position; and a first sealing means provided between the back pressure chamber and a suction zone of the compression mechanism and capable of maintaining sealing when the orbiting scroll member is axially displaced.

Abstract: A scroll compressor includes fixed and orbiting scrolls. The fixed scroll includes a fixed scroll end plate and a spiral fixed wrap extending from the end plate. The orbiting scroll includes an orbiting scroll end plate and an orbiting wrap extending from the end plate and engaging with the fixed wrap to form compression chambers. The fixed wrap includes a first fixed wrap portion on a radially outer side and a second fixed wrap portion on a radially inner side. The first fixed wrap portion is periodically covered by the orbiting scroll end plate and the second fixed wrap portion is always covered by the orbiting scroll end plate while the scroll compressor is operating. A sealing member is provided on one of the first fixed wrap portion and a first covering portion of the orbiting scroll end plate corresponding to the first fixed wrap portion.

Abstract: A scroll compressor is provided, comprising: a compression mechanism comprising a non-orbiting scroll member and an orbiting scroll member, wherein the orbiting scroll member is axially displaceable between an engagement position and a disengagement position; a main bearing housing adapted to support the compression mechanism; a back pressure chamber formed between the orbiting scroll member and the main bearing housing, wherein the back pressure chamber is in communication with at least one of the compression chambers via a communication passage provided in the orbiting scroll member or the non-orbiting scroll member and is adapted to apply a back pressure to the orbiting scroll member to bias the orbiting scroll member toward the engagement position; and a first sealing means provided between the back pressure chamber and a suction zone of the compression mechanism and capable of maintaining sealing when the orbiting scroll member is axially displaced.