A scroll compressor includes a shell, a fixed scroll and an orbiting scroll disposed in the shell, a first scroll wrap and a second scroll wrap that are provided in the fixed scroll and the orbiting scroll, respectively, and that are engaged with each other to form a plurality of compression chambers, a crankshaft that causes the orbiting scroll to perform eccentric revolving motion, a tip seal member that is inserted in the tip of the second scroll wrap along the spiral direction and that is in sliding contact with the first baseplate of the fixed scroll, and injection ports that are provided through the first baseplate of the fixed scroll and that introduce refrigerant at an intermediate pressure between suction pressure and discharge pressure into the compression chambers from the outside of the shell.

A low cost scroll device and methods of manufacturing the same are described. The scroll device includes, for example, a drive pin hole and bearing bores machined into a scroll of the scroll device from the same side as the involute of the scroll; idler shaft assemblies with no more than one bearing in the orbiting scroll for mechanically coupling the orbiting scroll to the fixed scroll; and an epoxy coating applied using a process that requires assembly of the scroll device only once.

A scroll compressor has: a revolving scroll; a fixed scroll; a compression chamber that is defined by the revolving scroll and the fixed scroll to compress a working fluid; a suction chamber that is defined by the revolving scroll and the fixed scroll to suck the compressed working fluid; an electric motor that drives the revolving scroll; a bypass mechanism that communicates or shuts off between the compression chamber and the suction chamber; and a sealed vessel, wherein the bypass mechanism has: a bypass port that is formed in the fixed scroll and communicates between the compression chamber and the suction chamber; and a bypass valve that opens and closes the bypass port, and wherein a groove is formed in the revolving lap to communicate between the bypass port and a suction pressure space when the bypass port is open.

A scroll machine, in particular a scroll compressor, has a first scroll unit with a base and a scroll rib protruding from the base with a scroll rib tip, a second scroll unit with a base and a scroll rib protruding from the base with a scroll rib tip. The first scroll unit can be moved along an orbital path relative to the second scroll unit and the first scroll unit and the second scroll unit engage with each other to form pressure chambers, and the scroll rib of a scroll rib tip having a face seal abuts sealingly to the base of the respective other scroll unit. The base of the first scroll unit and/or the base of the second scroll unit include(s) a pocket with an insert plate arranged in the pocket. Also contemplated is a refrigeration system.

A scroll device has a housing having a fixed scroll plate and an orbiting scroll plate mounted therein on an idler shaft, the fixed scroll plate having a side having a fixed interleaved involute scroll and an outward facing side, the orbiting scroll plate having a side that has an orbiting interleaved involute scroll, an inlet port for the introduction of a working fluid into the device, and a pressure plate positioned adjacent to the outward facing side of the fixed scroll plate.

Provided is a tip seal for a scroll compressor capable of reducing a frictional force between scroll members and the tip seal and contributing to energy saving of the scroll compressor while maintaining the sealing performance. A tip seal 1 in a spiral shape for sealing a compression chamber formed between a fixed scroll and a movable scroll in a scroll compressor provided with the fixed scroll and the movable scroll serving as the scroll members has a plurality of concave parts 4 formed by partially notching a sliding surface 5 on the sliding surface 5 for the scroll members, the concave parts 4 are arranged on at least one of a spiral inner peripheral surface 1b and a spiral outer peripheral surface 1a, and each of the concave parts 4 opens to the inner peripheral surface 1b or the outer peripheral surface 1a and also does not penetrate through the inner peripheral surface 1b or the outer peripheral surface 1a.

A scroll compressor includes a first chamfered portion formed at a distal end portion of a spiral blade of a fixed scroll, a second chamfered portion formed at a distal end portion of a spiral blade of an orbiting scroll, a third chamfered portion formed at a bottom portion of the spiral blade of the fixed scroll, and a fourth chamfered portion formed at a bottom portion of the spiral blade of the orbiting scroll. An expression of 0<{(Av1+Av2)/2}/Ac<110.sup.4 is satisfied where a sectional area of a space between the first chamfered portion and the fourth chamfered portion is defined as Av1, a sectional area of a space between the second chamfered portion and the third chamfered portion is defined as Av2, and a sectional area of a compression chamber is defined as Ac.

The scroll compression device includes a first scroll element (11) having a first base plate (13) and a first spiral wrap (14); a second scroll element (12) having a second base plate (15) and a second spiral wrap (16), one of the first and second scroll elements (11, 12) being configured to perform an orbiting movement in relation to the other one of the first and second scroll elements, the first and second scroll elements (11, 12) intermeshing with each other and delimiting compression chambers (17); and a sealing device (28) arranged in an end face (19) of the first spiral wrap (14) and having a sealing surface configured to cooperate with the second base plate (15). The sealing device (28) is configured to allow fluid flow from an upstream compression chamber to a downstream compression chamber through the sealing surface when the pressure in the upstream compression chamber exceeds the pressure in the downstream compression chamber, and the sealing device (28) is configured to prevent fluid flow from a downstream compression chamber to an upstream compression chamber through the sealing surface when the pressure in the downstream compression chamber exceeds the pressure in the upstream compression chamber.

A scroll compressor includes a sealed container, a fixed scroll that is disposed within the sealed container and includes a base plate and a scroll lap extending from a lower surface of the base plate, an orbiting scroll that is disposed within the sealed container and includes a base plate and a scroll lap extending from an upper surface of the base plate, a compression chamber defined by engagement of the scroll lap of the fixed scroll and the scroll lap of the orbiting scroll, and an injection passage that extends through the base plate of the fixed scroll from an upper surface of the base plate to the lower surface of the base plate and communicates with the compression chamber through an opening port. The scroll lap of the fixed scroll defining the compression chamber is at least partly located inside the opening port in plan view of the fixed scroll.

A tip seal for scroll wraps in a scroll compressor is provided. The tip seal may include surface features to form a tortuous flow path in a seal groove of a scroll wrap. The surface features can help form one or more contraction and/or expansion areas in the tortuous flow path. The tortuous flow path can help provide resistance to fluid flow and help reduce leakage through the seal groove.