Daikin Industries, Ltd.

Yuuichi Yamamoto

Masahide Higuchi

Chihiro Endou

Takeo Hayashi

Makoto Adachi

A rotary compressor includes a compression mechanism, a casing, a motor stator and a motor rotor. The motor stator includes stacked steel plates, teeth, and slots. The stacked steel plates are fixed to an inner surface of the casing. A number of the teeth and slots is nine. The motor rotor rotates a crankshaft to drive the compression mechanism. The stacked steel plates have first to ninth areas radially outside the nine teeth, first concave portions provided in five of the areas, and a second concave portion provided in at least one of four areas other than the five areas. The five first concave portions and an inner circumferential surface of a cylindrical portion form five first passages. The second concave portion and the inner circumferential surface of the cylindrical portion form at least one second passage.

Rotary compressor

A compressor includes a compression mechanism and a resin layer including a stack of three or more layers formed on a whole area or a portion of at least one surface of at least one part of the compression mechanism. A hardness of a layer most distant from a base in the resin layer is smaller than a hardness of a layer closest to the base in the resin layer. A difference in hardness between two adjacent layers in the resin layer is smaller than a difference in hardness between the layer most distant from the base and the layer closest to the base.

Compressor with different resin hardness layers

A compressor includes sliding members arranged to slide relative to each other when compressing a refrigerant. At least one of the sliding members has a resin layer that is formed on the whole area or a portion of at least one sliding surface. The resin layer has an arithmetic mean surface roughness (Ra) of 0.3 or more, or the whole area or a portion of an area opposed to the resin layer is entirely or partially harder than the resin layer and has an arithmetic mean surface roughness (Ra) of 0.3 or more.

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Kusatsu, Japan

Yuuichi Yamamoto