A compressor may include a non-orbiting scroll, an orbiting scroll, a driveshaft and an Oldham coupling. The orbiting scroll meshingly engages the non-orbiting scroll. The driveshaft includes a crankpin engaging the orbiting scroll and driving the orbiting scroll in an orbital path relative to the non-orbiting scroll. The Oldham coupling may include an annular body and a plurality of first keys extending from the annular body and slidably received in slots formed in the orbiting scroll. Each of the first keys may include a first post and a first cap attached to the first post. The first posts may be integrally formed with the annular body from a first material. The first caps may be formed from a second material.

A scroll compressor includes a main housing. A driving part configured to generate torque and a compression part driven by the driving part are accommodated in the main housing. The compression part includes a fixed scroll and an orbiting scroll that engages with the fixed scroll to form a compression chamber in which a refrigerant is compressed. The torque of the driving part is transmitted to the compression part by a driving shaft. The driving shaft is rotatably supported by a main bearing positioned in a low pressure region adjacent to the driving part. Accordingly, since the main bearing is disposed in a low pressure region, a load applied to the main bearing may be decreased.

A motor operated compressor includes an orbiting scroll that defines a compression chamber together with a fixed scroll. The compressor includes a main frame disposed around and supporting the orbiting scroll. The main frame defines a back-pressure chamber together with the orbiting scroll. The compressor includes a groove disposed in one of the orbiting scroll and the main frame. A first sealing member is inserted into the groove. A second sealing member is inserted into the groove to elastically press the first sealing member into close contact with the orbiting scroll or the main frame. A radial distance (a) between an outer wall of the groove and the first sealing member is 6 to 8% (0.06a/W0.08) of a difference (W) between an outer radius (OR) and an inner radius (IR) of the first sealing member (W=ORIR).

A system may include a first compressor, a second compressor, a first heat exchanger and a second heat exchanger. The first compressor has a first inlet and a first outlet. The second compressor is a sumpless compressor and has a second inlet and a second outlet. The second compressor provides working fluid discharged from the second outlet to the first compressor. The first heat exchanger is disposed upstream of the second compressor and provides working fluid to the second compressor. The second heat exchanger is disposed upstream of the first compressor and provides working fluid to the first compressor.

Systems and methods for providing lubricant from a first compressor to a second compressor are provided. A control module receives a start command for a climate-control system having the first and second compressors, allows lubricant from the first compressor to flow into an inlet of the second compressor, turns the second compressor to an ON-mode, and prevents lubricant from the first compressor from flowing into the inlet of the second compressor after the second compressor has been in the ON-mode for a predetermined time period.

A vane rotary compressor has a cylinder. A main bearing and a sub bearing are coupled to the cylinder forming a compression space. The main and sub bearing each have a back pressure pocket on a surface facing the cylinder. The main bearing and the sub bearing radially support a rotation shaft. A roller coupled to the shaft is disposed within the compression space. The roller has circumferentially spaced vane slots, each vane slot extending from an open end on an outer circumferential surface of the roller to a back pressure chamber disposed within the roller at an opposite end of each vane slot. A plurality of vanes slide within the vane slots and divide the compression space into compression chambers. At least one of the back pressure chambers in the vane slots fluidly communicates with at least one of the back pressure pockets in the main and sub bearings.

A compression chamber includes the compression chamber partitioning member, an intermediate pressure chamber guides an intermediate pressure working fluid before injection to the compression chamber, and the intermediate pressure chamber and the compression chamber face each other with a compression chamber partitioning member interposed between the intermediate pressure chamber and the compression chamber. Further, the intermediate pressure chamber includes an intermediate pressure chamber inlet through which an intermediate pressure working fluid flows, an injection port inlet of an injection port through which the intermediate pressure working fluid is injected into the compression chamber, and a liquid reservoir formed at a position below the intermediate pressure chamber inlet, and the liquid reservoir is formed by the compression chamber partitioning member.

A compressor may include a non-orbiting scroll, an orbiting scroll, a driveshaft and an Oldham coupling. The orbiting scroll meshingly engages the non-orbiting scroll. The driveshaft includes a crankpin engaging the orbiting scroll and driving the orbiting scroll in an orbital path relative to the non-orbiting scroll. The Oldham coupling may include an annular body and a plurality of first keys extending from the annular body and slidably received in slots formed in the orbiting scroll. Each of the first keys may include a first post and a first cap attached to the first post. The first posts may be integrally formed with the annular body from a first material. The first caps may be formed from a second material.

A compressor may include a non-orbiting scroll, an orbiting scroll, a driveshaft and an Oldham coupling. The orbiting scroll meshingly engages the non-orbiting scroll. The driveshaft includes a crankpin engaging the orbiting scroll and driving the orbiting scroll in an orbital path relative to the non-orbiting scroll. The Oldham coupling may include an annular body and a plurality of first keys extending from the annular body and slidably received in slots formed in the orbiting scroll. Each of the first keys may include a first post and a first cap covering at least a portion of the first post. The first posts may be integrally formed with the annular body from a first material. The first caps may be attached to the first posts and formed from a second material.

A scroll machine is particularly suited as a scroll compressor for refrigerant in a vehicle air-conditioning system. First and second scrolls are each formed with a base plate and with a spiral wall that projects from the base plate and follows a spiral line. The spiral wall of the second scroll engages in a spiral path formed by the first scroll and the spiral walls form a number of compressor chambers. The spiral walls have respective wall surface profiles in regions on their wall surfaces, with the wall surface profile being superposed on the spiral line. As the facing wall surface profile contacts a respective other spiral wall a contact normal at a point of contact, which contact normal extends obliquely with respect to a corresponding local normal of the corresponding first or second spiral line.