Daikin Industries, Ltd.

Daigo Fukuda

Takashi Inoue

Hiromichi Ueno

Koichi Tanaka

Nozomi Gotou

Kosuke Nishimura

Yuki Kawachiya

Arihiro Iwata

A turbo-type fluid machine includes a shaft configured to be rotationally driven, a compression mechanism having an impeller, and a coupling portion coupling an end portion of the shaft and the impeller with each other. The coupling portion is provided with a balance adjustment mechanism.

Turbo-type fluid machine and refrigeration apparatus

A screw compressor includes a screw rotor having a plurality of screw grooves, a plurality of gate rotors each including gates that mesh with the screw rotor, and a casing. The screw rotor is rotatably inserted in the casing. The casing has a cylindrical wall through which the gates pass. The screw compressor has a plurality of compression chambers inside the cylindrical wall. The plurality of compression chambers are defined by the screw rotor and the gates. The compression chambers include a first compression chamber and a second compression chamber. A fluid introduced into the casing at a suction pressure is compressed to an intermediate pressure higher than the suction pressure in the first compression chamber. The fluid at the intermediate pressure is compressed to a discharge pressure higher than the intermediate pressure in the second compression chamber.

Screw compressor, and refrigeration device

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Osaka, Japan

Daigo Fukuda