Daikin Industries, Ltd.

Chihiro Endou

Yukihiro Inada

Masahide Higuchi

Takeo Hayashi

Yuuichi Yamamoto

Masanori Masuda

Kazuhiro Furusho

Takazou Sotojima

Daiki Kikutake

Yuuya Sunahara

Yuuya Sawada

Emu Kato

Ryousuke Wada

Kouichi Irikawa

A rotary compressor includes a drive mechanism, a compression mechanism, an introduction path to introduce a fluid into a compression chamber of the compression mechanism, and a backflow suppression mechanism. At least one of a first surface and a second surface of a valve body includes an annular first non-contact region that is formed in a predetermined range extending radially inward from an outer edge of the valve body and that does not come into contact with a corresponding valve seat, an annular second non-contact region that is formed in a predetermined range extending radially outward from the hole of the valve body and that does not come into contact with a corresponding valve seat, and a contact region that is formed between the first non-contact region and the second non-contact region and that comes into contact with a corresponding valve seat.

Rotary compressor with backflow suppresion mechanism for an introduction path

An oscillating piston compressor includes two oscillating compression units, and an introduction section configured to introduce an intermediate-pressure refrigerant into a compression chamber of each of the compression units. Each compression unit has a cylinder forming a cylinder chamber, a piston housed in the cylinder chamber, and a blade integrally formed with the piston. The piston rotates in the cylinder chamber while the blade oscillates. The two compression units are configured such that phases of the pistons are opposite to each other. The piston has a non-circular outer peripheral surface, and the cylinder chamber has an inner peripheral surface with a shape determined based on an envelope of the outer peripheral surface of the piston in rotation.

Oscillating piston-type compressor

A compressor includes a compression mechanism that compresses low-pressure refrigerant in a compression chamber into high-pressure refrigerant, and an injection pipe arranged to supply intermediate-pressure refrigerant to the compression chamber. A valve assembly is disposable between the compression chamber and the injection pipe. The valve assembly includes an opening forming member that forms an opening, a valve body and a spring member. The valve body moves in accordance with differences between pressure of the refrigerant supplied from the injection pipe and pressure of the refrigerant in the middle of compression in the compression chamber. The valve body blocks the opening when the valve body has moved from a compression chamber side to an injection pipe side. The spring member is disposed on the injection pipe side of the opening. The spring member applies force in a direction of the injection pipe to the valve body.

Compressor and valve assembly

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.

Compressor with sliding member resin layer

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Osaka, Japan

Chihiro Endou