A scroll compressor includes an orbiting scroll including an end plate and a spiral element on the end plate, a fixed scroll including an end plate and a spiral element on the end plate, and an Oldham ring including a support. The scroll compressor satisfies a relation of 1>2, where 1 denotes each of the axial length of a gap between the tip of the spiral element of the orbiting scroll and the end plate of the fixed scroll and a gap between the tip of the spiral element of the fixed scroll and the end plate of the orbiting scroll, and 2 denotes the axial length of a gap between the end plate of the orbiting scroll and the support of the Oldham ring.

A scroll pump tip seal to be fitted to a tip face of a scroll wall of a first scroll of a scroll pump to seal between the tip face and a base plate of a second scroll of the scroll pump has a first end, a second end and a plurality of flexure formations. The flexure formations are at least partial discontinuities in the tip seal disposed at spaced apart intervals between the first and second ends of the tip to facilitate lateral flexure of the tip seal.

The invention relates to a displacement machine according to the spiral principle, in particular a scroll compressor or scroll expander, with a high-pressure chamber, a low-pressure chamber and an orbiting displacement spiral, which engages in a counter-spiral such that chambers are formed between the displacement spiral and the counter-spiral for receiving a working medium, wherein a counter-pressure chamber is formed between the low-pressure chamber and the displacement spiral. According to the invention a pressure regulating device which is fluidically connected to the counter-pressure chamber sets a pressure difference between the counter-pressure chamber and the low-pressure chamber by means of a set value specified by the computing unit.

A multi-stage vacuum pump, expander, or compressor, that incorporates one or more stages of a fixed scroll(s) and orbiting scroll(s) that operates simultaneously. The motor drives the orbiting scroll(s) within the structure, and the various fixed and orbiting scrolls are arranged for either parallel generation of a vacuum or high pressure gas, or arranged in series for generating of a significantly high vacuum or gaseous pressure, or a combination of parallel arranged and series arranged fixed and orbiting scrolls may be embodied within the structure, operated by a single motor means, in order to attain the high efficiencies of operation as a vacuum pump, or a gaseous compressor, during its functioning. The various combinations of orbiting and fixed scrolls, when arranged as aforesaid, can be reduced in size, or miniaturized, and used in conjunction with small appliances, or even in hand-held instruments, as for example, for use in conducting mass spectrometry, or for other purposes. The actual structure of the multi-stage devices can include the fixed and orbiting scrolls adjacent the motor, or the singular motor may be located intermediate various stages of the formed vacuum pump/compressor, in its assembly.

A scroll pump tip seal to be fitted to a tip face of a scroll wall of a first scroll of a scroll pump to seal between said tip face and a base plate of a second scroll of the scroll pump. The tip seal is made of metal and has at least one internally disposed void. The metal tip seal may be made of a foamed metal defining a plurality of internally disposed voids.

A scroll fluid machine includes fixed and orbiting scrolls which define a compression chamber; a land which divides the compression chamber into first-stage and second-stage compression chambers; a wrap groove defined in a spiral shape along a tip of a fixed wrap of the fixed scroll; an intermediate groove defined in the land; a seal member; and an intermediate seal member. The land includes a first-stage outlet in communication with the first-stage compression chamber and a second-stage inlet in communication with the second-stage compression chamber. The wrap groove includes an outer peripheral wrap groove adjacent to the land on a radially outward side and an inner peripheral wrap groove adjacent to the land on a radially inward side. The intermediate groove is in communication with the outer and inner peripheral wrap grooves. The seal member is fitted in the wrap groove except the outer and inner wrap grooves.

A scroll compressor for a motor vehicle air-conditioning system includes a compressor housing, two interleaving spirals within the compressor housing, of which one spiral is stationary and the other spiral is movable eccentrically on a circular orbit, whereby the volume of compression chambers formed between the spirals changes cyclically and refrigerant is suctioned in and compressed; at least one refrigerant outlet port for ejecting the compressed refrigerant in a wall, frontal to the spirals, of the compressor housing in the center of the stationary spiral, wherein in the spiral end region on the inner end of at least one of the two spirals the concave side of the spiral wall is provided with a cut that has the form of a cone segment with concave curvature, decreasing from the upper end in the direction toward the lower end of the spiral wall.

A scroll compressor is provided that can cool a fixed scroll and an orbiting scroll effectively via cooling fins. A scroll compressor includes: a fixed scroll, an orbiting scroll that performs orbiting motion with respect to the fixed scroll and is combined with the fixed scroll so as to form, with the fixed scroll, a compression space to compress fluid; cooling fins that are provided on the back of the fixed scroll; and cooling fins that are provided on the back of the orbiting scroll. The cooling fins and the cooling fins are taller in a central portion than in the circumference of the central portion.

A scroll compressor is provided that may include a first wrap, and a second wrap engaged with the first wrap and coupled to be eccentric to a center of rotation of a rotational shaft to form a compression chamber, moving toward a central portion, together with the first wrap while performing an orbiting motion with respect to the first wrap. A height of at least one of the first wrap or the second wrap may be formed to have at least two inclination machining amounts which decrease toward the central portion, and the inclination machining amount of the central portion may be larger than the inclination machining amount of an edge portion or a wrap rigidity at a specific section, thereby preventing frictional loss or abrasion of the wrap and breakage of the wrap.

A scroll compressor is provided. The scroll compressor may include a casing including a rotational shaft, a discharge cover fixed at an inside of the casing to partition the inside of the casing into a suction space and a discharge space, a first scroll rotated by the rotational shaft to perform an orbiting motion, a second scroll disposed on or at a side of the first scroll to define a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure among the plurality of compression chambers, a back pressure plate coupled to the second scroll, the back pressure plate having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole, a floating plate movably disposed on or at a side of the back pressure plate to define a back pressure chamber together with the back pressure plate, and a discharge guide defined in the first scroll or the second scroll to guide discharge of a refrigerant within the back pressure chamber.