COMPRESSOR

WIPO Patent Application WO/2023/176040

A1

The present invention includes a piston (14) that includes a piston ring groove (14b) on an outer peripheral surface formed by a curved surface, and that reciprocates while pivoting in a cylinder (15); a piston ring (14c) that is mounted in the piston groove (14b) and that slides on an inner circumferential surface of the cylinder (15); and a crank shaft (11) that causes the piston (14) to reciprocate via a connecting rod (13). A center axis (AX1) of the cylinder (15) is disposed at a position separated from a rotation axis (AX2) of the crank shaft (11). A rotation stopper (14i) of the piston ring (14c) is provided in the piston ring groove (14b). In a compression step, abutment clearances (14hc), (14hd), (14he) of the piston ring (14c) are positioned on the outer peripheral surface (14a) side of the piston (14) which is in a state of being against the inner circumferential surface of the cylinder (15).

JPH10122150	COMPRESSOR AND DAMPING COATING FILM FORMING METHOD OF COMPRESSOR OR THE LIKE
JPH0436458	SLIDING PARTS AND FREQUENCY VARIABLE TYPE REFRIGERANT COMPRESSOR USING THESE PARTS

SUDO KOSUKE (JP)
NARISAWA NOBUYUKI (JP)
GOTO SHO (JP)
HASEGAWA NAOYA (JP)

PCT/JP2022/042312

September 21, 2023

November 15, 2022

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HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)

F04B39/00

WO2021065037A1	2021-04-08
WO2013178310A1	2013-12-05
WO2016108275A1	2016-07-07

JPH04214970A	1992-08-05
JPS5569172U	1980-05-13
JPS6148978U	1986-04-02
JP2007032532A	2007-02-08
JPS58146059U	1983-10-01

KAICHI IP (JP)

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