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US 6,279,325 B1Granted
Stirling device
AssigneeSanyo Electric Co., Ltd.
InventorsHiroshi Sekiya, Nobuo Koumoto, Eiji Fukuda, Takashi Inoue, Hirotaka Kakinuma, Takeo Komatsubara
Life of this patent
Estimating the term…
Abstract
There is disclosed a Stirling cycle refrigerator in which oil rising is prevented, and an adverse influence onto oil sealing bellows by a pressure rise accompanying the temperature rise of the crank chamber is prevented. The oil sealing bellows are disposed between a space in a housing and compression and expansion cylinders, and a buffer tank provided with the pressure adjusting bellows is disposed between a space on the back surface side of the compression and expansion pistons and the space in the housing, so that the pressure rise in the housing and the pressure fluctuation of the space are absorbed.
Claims39
A Stirling cycle device, comprising:
- housing having a crank chamber;
- cylinder disposed above and adjacent to said crank chamber;
- piston for reciprocating in said cylinder to compress or expand operating gas, or a displacer;
- piston rod operatively connected to a crank in said crank chamber and having one end connected to said piston, or the displacer;
- and
- an oil seal disposed in an opening in a top of said crank chamber through which said piston rod is passed, wherein
- said oil seal comprises oil sealing bellows whose tip end is fixed to said piston rod in said cylinder and whose base end is fixed to a peripheral edge of the opening in the top of said crank chamber provided with said piston rod passed therethrough, and
- by disposing the oil sealing bellows, oil is inhibited from entering said cylinder via a space in said housing.
5 more elements
A Stirling cycle device, comprising:
- a housing having a crank chamber;
- a cylinder disposed above and adjacent to said crank chamber;
- a piston for reciprocating in said cylinder to compress or expand operating gas;
- a piston rod operatively connected to a crank in said crank chamber and having one end connected to said piston;
- and
- an oil seal disposed in an opening in a top of said crank chamber through which said piston rod is passed, wherein
- between a space on the side of a back surface of said piston, and a space in said housing, a buffer tank for absorbing a pressure fluctuation in said space on the back surface side and a pressure rise in said housing is connected via connecting means,
- inside said buffer tank, pressure adjusting bellows are disposed to divide the buffer tank into a chamber on the side of an opening of the pressure adjusting bellows, and a chamber on the side of a closing wall, and
- said chamber on the opening side and the chamber on the closing wall side are connected to either one of said space on the back surface side of the piston and the space in said housing.
6 more elements
A Stirling cycle device, comprising:
- a housing having a crank chamber;
- a cylinder disposed above and adjacent to said crank chamber;
- a piston for reciprocating in said cylinder to compress or expand operating gas;
- a piston rod operatively connected to a crank in said crank chamber and having one end connected to said piston;
- and
- an oil seal disposed in an opening of a top of said crank chamber through which said piston rod is passed, wherein
- between a space on the side of a back surface of said piston, and a space in said housing, a buffer tank for absorbing a pressure fluctuation in said space on the back surface side and a pressure rise in said housing is connected via connecting means, and
- between said buffer tank and said space in the housing, an oil trapping device, or the oil trapping device connected to a pressure adjusting constriction device is disposed, so that pressure adjustment can be performed in said space on the back surface side of the piston for compressing or expanding the operating gas and said space in the housing.
5 more elements
A Stirling cycle device, comprising:
- a housing having a crank chamber;
- a cylinder disposed above and adjacent to said crank chamber;
- a piston for reciprocating in said cylinder to compress or expand operating gas;
- a piston rod operatively connected to a crank in said crank chamber and having one end connected to said piston;
- and
- an oil seal disposed in an opening of a top of the crank chamber through which said piston rod is passed, wherein
- a space on the side of a back surface of said piston, and a space in said housing are connected via an oil trapping device in order to absorb a pressure fluctuation of said space on the back surface side.
4 more elements
A Stirling cycle device, comprising:
- a cylinder block comprising
- a cylindrical top heat exchange housing having a top wall and a side wall, and an inner cylinder disposed in the top heat exchange housing in which a piston or a displacer slides, wherein
- a linear fine groove in an axial direction is formed in an inner peripheral face on the side of a tip end of said top heat exchange housing to form an operating gas channel with an outer peripheral face of said inner cylinder,
- an annular recess is formed in the inner peripheral face on the side of a base end of said top heat exchange housing to form a channel for an operating gas regenerator with the outer peripheral face of said inner cylinder,
- a cylindrical heat exchanger is disposed outside said inner cylinder, which comprises an annular heat exchange housing and a heat exchanger body inserted/fixed inside the housing,
- a heat exchanging fin is formed in an outer peripheral face of said heat exchanger body, and a linear fine groove in an axial direction is formed in an inner peripheral face to form the operating gas channel with the outer peripheral face of said inner cylinder,
- a space between said annular heat exchange housing and said heat exchanger body is formed as a refrigerant path, and a refrigerant inlet and a refrigerant outlet are formed in said annular heat exchange housing so that the refrigerant path is connected,
- said top heat exchange housing and said heat exchanger body are formed by lost wax casting, and the annular heat exchange housing is formed by the lost wax casting or iron casting.
5 more elements
Dependencies are inferred from the claim text.