Abstract: A scroll compressor includes a compression chamber that compresses a fluid, an outer peripheral passage into which the fluid flows from a motor chamber, and a suction passage draws in the fluid from the outer peripheral passage to the compression chamber. The compression chamber is defined by a fixed scroll and an orbiting scroll. The outer peripheral passage is defined by a third peripheral wall of a discharge housing member and a fixed peripheral wall of the fixed scroll. The suction passage is provided in the fixed peripheral wall and includes an upstream-side outer peripheral surface located between the suction passage and an electric motor in an axial direction of a rotary shaft. A distance from an axis of the rotary shaft to the upstream-side outer peripheral surface varies in the axial direction of the rotary shaft.

Abstract: A scroll compressor includes a housing, a first scroll, a second scroll being configured to rotate relative to the first scroll about a driving axis of the scroll compressor. The second scroll has an end plate, a spiral element, and an adjustment portion adjusting a center-of-gravity of the second scroll. The adjustment portion has a bottom surface, a peripheral surface enclosing the bottom surface, and a connection surface connecting the bottom surface to the peripheral surface. The peripheral surface has a first peripheral surface and a second peripheral surface. A length of the first peripheral surface in a direction in which the driving axis extends is shorter than a length of the second peripheral surface in the direction in which the driving axis extends.

Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll. The orbiting scroll includes an orbiting volute wall. The orbiting volute wall is shaped to form an involute and to have a thickness. The orbiting volute wall includes a thin section in which the thickness is less than those in adjacent sections. The thin section includes a region corresponding to an involute angle that is obtained by subtracting 360° from a maximum of the involute angle.

Abstract: An electric compressor includes a housing including a compression part housing, a shaft support housing, and a motor housing fastened by a plurality of fastening members. A peripheral wall has a plurality of thick-walled portions that protrudes inwardly in a radial direction and through which their associated fastening members are inserted. The fixed scroll base plate has a plurality of protruded portions each protruding outwardly in the radial direction and disposed between the thick-walled portions in a circumferential direction. The fixed scroll base plate has a plurality of pillar portions each extending from the protruded portions toward the shaft support housing in the axial direction and spaced from each other in the circumferential direction. The elastic plate is held at a plurality of spots by the plurality of pillar portions and the shaft support housing.

Abstract: A scroll compressor includes a fixed scroll and an orbiting scroll. The orbiting scroll includes an orbiting volute wall. The orbiting volute wall is shaped to form an involute and to have a thickness. The orbiting volute wall includes a thin section in which the thickness is less than those in adjacent sections. The thin section includes a region corresponding to an involute angle that is obtained by subtracting 360° from a maximum of the involute angle.

Abstract: A scroll compressor includes: a housing; a rotary shaft; a fixed scroll including a fixed base plate, a fixed spiral wall, and an outer peripheral wall; an orbiting scroll including an orbiting base plate and an orbiting spiral wall; a compression chamber; a suction port; a suction chamber; a discharge chamber; an oil storage chamber; and an oil supply hole. The fixed scroll includes a groove disposed at the same position as the oil supply hole or on an outer side with respect to the oil supply hole in a radial direction of the rotary shaft. At least part of the groove is configured to be closed by the orbiting base plate according to a revolution of the orbiting scroll. The oil supply hole and the groove form part of an oil supply passage that supplies oil in the oil storage chamber to the suction chamber.

Abstract: An electric compressor includes a housing including a compression part housing, a shaft support housing, and a motor housing fastened by a plurality of fastening members. A peripheral wall has a plurality of thick-walled portions that protrudes inwardly in a radial direction and through which their associated fastening members are inserted. The fixed scroll base plate has a plurality of protruded portions each protruding outwardly in the radial direction and disposed between the thick-walled portions in a circumferential direction. The fixed scroll base plate has a plurality of pillar portions each extending from the protruded portions toward the shaft support housing in the axial direction and spaced from each other in the circumferential direction. The elastic plate is held at a plurality of spots by the plurality of pillar portions and the shaft support housing.

Abstract: A scroll compressor includes: a housing; a rotary shaft; a fixed scroll including a fixed base plate, a fixed spiral wall, and an outer peripheral wall; an orbiting scroll including an orbiting base plate and an orbiting spiral wall; a compression chamber; a suction port; a suction chamber; a discharge chamber; an oil storage chamber; and an oil supply hole. The fixed scroll includes a groove disposed at the same position as the oil supply hole or on an outer side with respect to the oil supply hole in a radial direction of the rotary shaft. At least part of the groove is configured to be closed by the orbiting base plate according to a revolution of the orbiting scroll. The oil supply hole and the groove form part of an oil supply passage that supplies oil in the oil storage chamber to the suction chamber.