Abstract: In a scroll compressor, a center of a turning scroll body is shifted with respect to a drive central axis so that a distance between a gravity center and the drive central axis in a turning scroll becomes smaller than a predetermined allowable value set based on theoretical displacement and mass of the turning scroll. A moment force about the drive central axis acting on the turning scroll is reduced during revolving, and an alternating force acting on an autorotation preventing pin in the turning scroll is reduced to an allowable level.

Abstract: An object is to provide a refrigerant evaporator in which a liquid refrigerant can be evenly distributed to a plurality of refrigerant tubes connected to first and second tanks in a U-turn block to improve heat-exchange performance. In the refrigerant evaporator, one of a plurality of blocks into which a refrigerant supply channel is divided is a U-turn block (15) where a refrigerant flows into one of the first and second tank portions (6, 7) of an upper tank (4) in a direction along a partition wall (4C), flows into the other tank portion, and is distributed and flows from the first and second tank portions (6, 7) into a plurality of refrigerant tubes (2). The partition wall (4C) partitioning the first and second tank portions (6, 7) of the upper tank (4) has a plurality of refrigerant-distributing holes (4M) arranged in a longitudinal direction of the partition wall (4C) in the U-turn block (15) so that the first tank portion (6) communicates with the second tank portion (7).

Abstract: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a scroll compression mechanism is housed within a housing having a funnel shaped, a compression mechanism main body of the scroll compression mechanism is arranged in a wide opening section of a front housing, and a compression mechanism driving section is arranged in a narrow section, a concave section is formed on the outside of a thrust receiving surface which is positioned on a bottom surface of the wide opening section and which supports the compression mechanism.

Abstract: There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor where a scroll compression mechanism 23 is housed within a housing 3 having a funnel shaped, a compression mechanism main body of the scroll compression mechanism 23 is arranged in a wide opening section of a front housing 5, and a compression mechanism driving section is arranged in a narrow section, a concave section 51 is formed on the outside of a thrust receiving surface 5B which is positioned on a bottom surface of the wide opening section and which supports the compression mechanism.