Daikin Industries, Ltd.

Keiji Komori

Hiroshi Kitaura

Takehiro Kanayama

Hiroyuki Taniwa

Taisei Tamaoki

Kazuhiro Furusho

Mikio Kajiwara

Masahide Higuchi

Naoto Tomioka

Katsumi Kato

Hideki Matsuura

Ryohei Deguchi

Tatsuya Katayama

Kazuo Ida

Hiroki Kamiishida

Takeo Hayashi

Nobuhiro Nojima

Daiki Kikutake

Shota Kamei

Masatoshi Hirano

Shogo Tsuchikawa

A compressor unit includes a compressor and an accumulator. The compressor includes a vertically elongated first casing, an electric motor, a drive shaft, and a compression mechanism. The accumulator includes a vertically elongated second casing. In a frequency range between a value three times larger than a maximum compressor rotation speed and 1.25 times greater than the value when a first part is vibrated, an index showing a frequency response function of the second casing in a circumferential direction in a second part is 1.0 m/s/N or less. The first part is part of an upper part of a side surface of the first casing and is orthogonal to an alignment direction of the compressor and the accumulator, and the second part is part of an upper part of a side surface of the second casing and is opposed to a part facing the first casing.

Compressor unit

A compressor includes a member with a recess in which a reed discharge valve is disposed. The recess has a discharge hole, a fixation hole, and an annular projection formed around the discharge hole. The discharge valve includes a fixed portion, a flexible portion, and a head portion to open/close the annular projection. A protruding portion is formed at a rear end portion of the fixed portion. A first side surface of the protruding portion is designed to be substantially flush with a side surface of the fixed portion, which surface is closer to a center of the member. When the discharge valve rotates in a predetermined direction about the fixation hole after the discharge valve is disposed in the recess but before being fixed to the member, the first side surface of the protruding portion comes into contact with a side wall of the recess.

Compressor

A compressor includes a first muffler chamber communicating with a first cylinder chamber, and a second muffler chamber communicating with a second cylinder chamber. The first muffler chamber and the second muffler chamber are communicated with each other by a gas passage. The gas passage is communicated with a Helmholtz type resonance chamber by a connecting passage. The connecting passage is connected to a lowermost end of the resonance chamber. Therefore, oil contained in the refrigerant gas, even if having entered into the resonance chamber, is discharged through the connecting passage located at the lowermost end of the resonance chamber to outside of the resonance chamber. Thus, since oil is not accumulated in the resonance chamber, the resonance chamber keeps generally constant in capacity at all times.

Compressor having a helmholtz type resonance chamber with a lowermost end connected to a gas passage

A rotary compressor includes a cylinder body, end plate members fitted on both sides of the cylinder body, a roller placed in a cylinder chamber, a blade fitted to the roller, and a bushing for supporting the blade. A width of the bushing in a roller axis direction is larger than an axial width of the roller. A gap in the roller axis direction between the roller and the end plate members is larger than a gap in the roller axis direction between the bushing and the end plate members.

Rotary compressor with reduced refrigeration gas leaks during compression while preventing seizure

A high-pressure, dome-type compressor includes a DC motor having a rotor that uses a rare earth/iron/boron permanent magnet having an intrinsic coercive force of 1.7 MA.m or greater in a rotor thereof and has a rated output or 1.9 kW or higher. The motor, which drives a compression element in a casing , is disposed in a high pressure, high temperature area , which is filled with gas discharged from the compression element. An inverter controls current supplied to the motor such that the motor temperature becomes equal to or less than a predetermined temperature and an opposing magnetic field generated in a stator has a predetermined strength or less. Since the magnet does not reach a high temperature and is not exposed to a strong opposing magnetic field, it is hardly demagnetized. As a result, performance of the motor and of the compressor is stable.

High-pressure dome type compressor

In a scroll type compressor ( ) that includes a fixed scroll ( ) fixed inside of a casing ( ) and a movable scroll ( ) meshed with the fixed scroll ( ) and presses the movable scroll ( ) against the fixed scroll ( ), the pressing force of the movable scroll ( ) against the fixed scroll ( ) is obtained from the pressure of a high-pressure space (S ) that acts on the back face of the movable scroll ( ) and the pressing force is controlled in accordance with the variation in the compression ratio with the change in the operating condition thereby preventing decrease in efficiency and mechanical loss.

Scroll type compressor

Oil-level controller for compressor

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Kusatsu, Japan

Keiji Komori