Daikin Industries, Ltd.

Dakin Industries, Ltd.

Katsumi Kato

Kazuhiro Furusho

Yoshitaka Shibamoto

Hiroyuki Yamaji

Masahide Higuchi

Masanori Masuda

Yasuo Mizushima

Hiroshi Kitaura

Keiji Komori

Yohei Nishide

Takeshi Endou

Eitarou Nakatani

Yukiko Maejima

Takahiro Ohno

Akira Himeda

A scroll compressor includes fixed and movable scrolls including fixed and movable side end plates and fixed and movable side wraps. The fixed-side end plate includes a first fixed-side passage that communicates with a high-pressure space, and a second fixed-side passage to supply lubricating oil from the high-pressure space to a compression chamber formed between the scrolls. The movable-side end plate includes a movable-side groove that intermittently allows communication between the first fixed-side passage and the second fixed-side passage. The compression chamber includes a first compression chamber, and a second compression chamber located inside the first compression chamber. The second fixed-side passage includes a first fixed-side hole that intermittently communicates with the movable-side groove, and a second fixed-side hole that communicates with the first fixed-side hole and intermittently communicates with the second compression chamber.

Scroll compressor

A scroll compressor includes fixed and movable scrolls, and a drive part. The fixed scroll has a fixed-side end plate, a fixed-side lap, and a thrust sliding portion surrounding the first lap. The movable scroll has a movable-side end plate and a movable-side lap. The drive part revolves the movable scroll so that refrigerant in a compression chamber formed by the fixed-side lap and movable-side lap is compressed. A back-pressure space which communicates with the compression chamber for at least a prescribed period in a revolution cycle is formed at the back face side of the movable scroll. A first oil channel supplied with oil from a space is formed in a first angle region of the fixed-side end plate. A communication channel formed in a second angle region communicates with the compression chamber. A second oil channel communicating with the back-pressure space is formed in the second angle region.

A compressor includes a casing accommodating a refrigerant passageway, a compression mechanism and a pipe. The compression mechanism is disposed in the interior of the casing to discharge compressed refrigerant into the refrigerant passageway. The pipe extends from inside of the casing to outside of the casing. The pipe includes two ends. One end is a closed end disposed in a predetermined position inside the refrigerant passageway. The other end of the pipe is an opened end disposed outside the casing. The pipe is preferably sized so that a measuring instrument can be inserted into the pipe through the opened end.

Compressor and refrigeration apparatus using the same

The outer peripheral surface of a swing piston is formed in a non-circular form. The inner peripheral surface of a cylinder chamber is formed on a basis of an envelope curve of the outer peripheral surface of the swing piston obtained at the time of its swing. The outer peripheral surface of the swing piston and the inner peripheral surface of the cylinder chamber are formed in, e.g., an ovoid shape so that as compared to a rotary compressor in which such inner and outer peripheral surfaces are formed in a circular form, a shorter compression cycle and a longer discharge cycle is obtained during movement of the swing piston. As a result, an overcompression loss when a refrigerant is discharged in a swing compressor is reduced.

Rotary compressor

In a scroll compressor, a sliding direction of a Oldham coupling is defined such that an acting direction of an inertia force of the Oldham coupling is substantially opposite to an acting direction of a reaction force by gas compression, and thereby a range of fluctuation of a total torque of a first rotational torque acting on an orbiting scroll by the reaction force of gas compression and a second rotational torque of sliding movement of the Oldham coupling becomes smaller than that of the first rotational torque to suppress a noise and vibration caused by fluctuation of a rotational torque of the orbiting scroll without any limited designing of an involute shape thereof.

An adjusting mechanism () is provided to produce an anti-overturning moment to reduce an overturning moment acting on an orbiting scroll () during its revolution in a revolving-angle area in which the overturning moment becomes a certain value or more. Accordingly, revolution movement of the orbiting scroll () can be made stable by changing a pressing force of the orbiting scroll () against the fixed scroll () according to fluctuation of the overturning moment due to the revolution of the orbiting scroll (), thereby improving the compression efficiency of a scroll-type compressor ().

Scroll-type compressor

A lubrication path to press-contact surfaces of a fixed and orbiting scrolls serves also as a high-level pressure introduction passageway when a difference between a high-level pressure and a low-level pressure is great. On the other hand, when the high-level pressure introduction passageway is blocked off in a state in which the high-low pressure difference is small, refrigerating machine oil is supplied to the press-contact surfaces through a low-level pressure space within the casing, for controlling the pressing force of the orbiting scroll against the fixed scroll, and the construction for preventing a decrease in efficiency is simplified, thereby not only reducing the cost but also preventing the occurrence of a maloperation.

A stationary scroll is provided with a stationary side wrap and an outer peripheral portion. The stationary side wrap is formed into a spiral wall shape. The outer peripheral portion is formed into a ring-like shape enclosing the periphery of the stationary side wrap. A movable scroll is provided with a first flat plate, a movable side wrap, and a second flat plate. The movable side wrap is formed into a spiral wall shape. Additionally, the movable side wrap is caught between the first flat plate and the second flat plate, with the movable side wrap in mating engagement with the stationary side wrap. In the movable side wrap, the first flat plate is formed integrally with the movable side wrap. Additionally, the second flat plate is formed as a separate body from the first flat plate and the movable side wrap and is coupled to the first flat plate with a bolt.

Scroll type fluid machine

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.

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Sakai, Japan

Katsumi Kato