An oil-free scroll air compressor, includes two fixed scrolls and a movable scroll with scroll wraps on both sides. The fixed scrolls each are provided on an end surface thereof with scroll wraps. The movable scroll with scroll wraps on both sides is provided on both end surfaces thereof with scroll wraps. The two fixed scrolls and the movable scroll with scroll wraps on both sides together form two gas compression channels located on two sides. The scroll warps on a same end surface are configured as a double-parallel-groove structure, which further divides the gas compression channel on the same side into two gas compression channels, thereby increasing displacement of the scroll air compressor. After a gas is introduced through a gas inlet on a circumferential surface of the fixed scroll, the gas is compressed in multiple compression channels and then discharged from a center of the scroll air compressor.

A scroll compressor is provided that may include a casing, a drive motor, an orbiting scroll, a non-orbiting scroll, and a floating plate provided with a cover portion to cover an area between an outer wall portion and an inner wall portion of the non-orbiting scroll so as to form a back pressure chamber with the non-orbiting scroll, and a valve accommodating portion that extends from the cover portion so as to accommodate a discharge valve configured to open and close a discharge port. Accordingly, structure for forming a back pressure chamber is simplified to thereby reduce the number of components and man-hours required for assembly.

A tip seal 1 for a scroll compressor capable of reducing a frictional force between scroll members and the tip seal where the tip seal 1 has 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. The movable scroll having a plurality of concave parts 4 being formed by partially notching a sliding surface 5 on the scroll members, the concave parts 4 being arranged on at least one of a spiral inner peripheral surface 1b or a spiral outer peripheral surface 1a. Each of the concave parts 4 being open to the inner peripheral surface 1b or the outer peripheral surface 1a.

The scroll compressor includes a fixed scroll (8) having a fixed end plate (11) and a fixed spiral wrap (12) extending from the fixed end plate (11); an orbiting scroll (9) having an orbiting base plate (14) and an orbiting spiral wrap (15) extending from a first face of the orbiting base plate (14), the orbiting spiral wrap (15) of the orbiting scroll (9) meshing with the fixed spiral wrap (12) of the fixed scroll (8) to form compression chambers (18), the orbiting base plate (14) having a flange portion (16) radially extending on at least part of the circumference of the orbiting base plate (14) and beyond an outer wall surface of the orbiting spiral wrap (15); and a first and a second axial stabilizing arrangement (29, 31) configured to axially stabilize the orbiting scroll (9), the first axial stabilizing arrangement (29) being formed between the flange portion (16) of the orbiting base plate (14) and the fixed scroll (8), and the second axial stabilizing arrangement (31) being formed between a portion of the orbiting spiral wrap (15) of the orbiting scroll (9) and the fixed end plate (11) of the fixed scroll (8).

A scroll type positive displacement assembly includes a first scroll and a second scroll, where the second scroll is configured to orbit with respect to a center of the first scroll without rotating with respect to the first scroll. Together, the first scroll and the second scroll define a compression chamber between two seal points where the first scroll and the second scroll contact one another as the second scroll orbits with respect to the first scroll during a compression cycle, and the two seal points come together proximate to a discharge port between the first scroll and the second scroll such that there is at least substantially no dead space between the first scroll and the second scroll at an end of the compression cycle. For example, the two seal points remain in sealing contact during at least one hundred and eighty (180) degrees of the compression cycle.

A compressor is provided. The compressor may include a fixed wrap, and an orbiting scroll having an orbiting wrap engaged with the fixed wrap to form compression chambers. The fixed wrap and the orbiting wrap may have irregular wrap curves. At least one interference avoiding portion at which a spacing between the wraps is greater than an orbiting radius or at least one gap compensating portion at which the spacing between the wraps is smaller than the orbiting radius, in a state in which a center of the fixed scroll and a center of the orbiting scroll are aligned with each other, may be provided on a sidewall surface of the fixed wrap or the orbiting wrap, whereby frictional loss or abrasion due to interference between the wraps or a refrigerant leakage due to a gap between the wraps may be prevented.

A scroll compressor of an electrical refrigerant drive contains a housing having a low-pressure chamber, a high-pressure chamber, compression chambers and a counter-pressure chamber. A stationary scroll has a base plate and a spiral wall, the base plate of the stationary scroll delimits the high-pressure chamber. A movable scroll has a base plate and a spiral wall which engages into the spiral wall of the stationary scroll and forms the compression chambers with the spiral wall. The base plate of the movable scroll delimits the counter-pressure chamber. A first fluidic connection is provided which connects the counter-pressure chamber to the radially innermost compression chamber, and the first fluidic connection is located in a positioning region of the radially innermost compression chamber between 75° to 195° following the merge angle.

A compressor, more particularly, a scroll compressor provides structures that may enhance centrifugal stiffness at a contact point between a fixed scroll and an orbiting scroll. The compressor may include an orbiting scroll having an orbiting scroll wrap wound around a radial-direction inner area from a radial-direction outer area; and a fixed scroll having a fixed scroll wrap wound around the radial-direction inner area from the radial-direction outer area. A surfacing part may be configured to narrow a distance between the orbiting scroll wrap and the fixed scroll wrap may be formed in a predetermined section of the orbiting scroll or fixed scroll wrap.

A scroll compressor is provided that can prevent liquid from being accumulated with a simple structure.

The scroll compressor includes: a fixed scroll 11; an orbiting scroll 12; and a rotation shaft 13 that extends in the horizontal direction and causes the orbiting scroll 12 to orbit relative to the fixed scroll 11, and liquid is injected to a working chamber at an intake process or to the upstream side thereof. An enclosing point P of a working chamber formed near the outer end of a fixed wrap 16 of the fixed scroll 11 is positioned below a center O of the rotation shaft 13 and at the lowest point of the contour of the working chamber having shifted to the lowest position. The fixed scroll 11 has an inclined wall surface 33 that is positioned below the center 0 of the rotation shaft 13, is made to face upward, and extends from the dust wrap 17 to the outer end of the fixed wrap 16. The inclined wall surface 33 is formed so as to be sloped down gradually from the dust wrap 17 toward the outer end of the fixed wrap 16.

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.