A piston compressor comprises a piston (12) which oscillates in a cylinder (14). A compressed-gas supply arrangement is provided which comprises a compressed-gas accumulator (34), a compressed-gas supply line (18) between a compressed-gas source (20) and the compressed-gas accumulator (34). Further,
A piston compressor comprises a piston (12) which oscillates in a cylinder (14). A compressed-gas supply arrangement is provided which comprises a compressed-gas accumulator (34), a compressed-gas supply line (18) between a compressed-gas source (20) and the compressed-gas accumulator (34). Further, the compressed-gas supply line (18) comprises an inlet valve (42) which is open when the piston (12) is in a filling position. The inlet valve (42) is defined by a cylinder wall opening (22) and a piston wall opening (38) which are located opposite each other when the piston (12) is in the filling position, thus defining an open valve, and which are closed by the piston wall (40) and the cylinder wall (24), respectively, when the piston (12) is in the non-filling position, thus defining a closed valve. Thereby, a valve is provided which does not comprise any moving parts and is thus easy to manufacture, is highly reliable and has a long service life.
대표청구항▼
Having thus described the preferred embodiments, the invention is now claimed to be: 1. A piston compressor comprising: a cylinder housing which forms a cylinder wall that defines a cylinder; a piston which oscillates in the cylinder and, in a filling position, compresses gas in a cylinder pressure
Having thus described the preferred embodiments, the invention is now claimed to be: 1. A piston compressor comprising: a cylinder housing which forms a cylinder wall that defines a cylinder; a piston which oscillates in the cylinder and, in a filling position, compresses gas in a cylinder pressure space, the piston defining a piston wall which faces the cylinder wall; gas bearing nozzles arranged adjacent the piston for gas-supporting the piston, at least one of the gas bearing nozzles being arranged in the cylinder housing and facing the piston wall; a compressed-gas accumulator connected with the gas bearing nozzles; a compressed-gas supply line between the cylinder pressure space and the compressed-gas accumulator; and an inlet valve in the compressed-gas supply line, the inlet valve being open in the filling position of the piston the inlet valve being defined by a cylinder wall opening and a piston wall opening which, in the filling position of the piston, are located opposite each other and define an open valve, and, in a non-filling position, are closed by the piston wall and the cylinder wall, respectively, and define a closed valve. 2. The piston compressor according to claim 1, wherein at least one of the cylinder wall opening and the piston wall opening are configured as a circular groove. 3. The piston compressor according to claim 1, wherein the compressed-gas supply line is arranged in the cylinder housing between the cylinder pressure space and the inlet valve. 4. The piston compressor according to claim 1, wherein the compressed-gas supply line is arranged in the piston between a piston end and the piston wall. 5. A piston compressor comprising: a cylinder housing which forms a cylinder wall that defines a cylinder; a piston which oscillates in the cylinder and, in a filling position, compresses gas in a cylinder pressure space, the piston defining a piston wall which faces the cylinder wall; gas bearing nozzles arranged adjacent the piston for gas-supporting the piston, each gas bearing nozzle being formed by a wire inserted in a nozzle bore. 6. The piston compressor according to claim 4, wherein in the compressed-gas supply line a second inlet valve defined by a second cylinder wall opening and a second piston wall opening is arranged. 7. The piston compressor according to claim 1, wherein in the cylinder, an anti-twist device is provided which prevents the piston from twisting in the cylinder. 8. The piston compressor according to claim 5, wherein the compressed-gas accumulator and the gas bearing nozzles are arranged in the piston. 9. The piston compressor according to claim 1, wherein each gas bearing nozzle is formed by a gas-permeable plug of sintered material. 10. The piston compressor according to claim 1, wherein at least one of the gas bearing nozzles is arranged in a respective transversal plane adjacent end portions of the piston. 11. The piston compressor according to claim 1, wherein at least one of the gas bearing nozzles is provided in the piston. 12. The piston compressor according to claim 8, wherein the gas bearing nozzles are arranged in the cylinder housing. 13. A piston compressor comprising: a cylinder housing which forms a cylinder wall that defines a cylinder; a piston which oscillates in the cylinder and, in a filling position, compresses gas in a cylinder pressure space, the piston defining a piston wall which faces the cylinder wall; gas bearing nozzles arranged adjacent the piston for gas-supporting the piston; a compressed-gas accumulator connected with the gas bearing nozzles; a compressed-gas supply line between the cylinder pressure space and the compressed-gas accumulator; an inlet valve in the compressed-gas supply line, the inlet valve being open in the filling position of the piston the inlet valve being defined by a cylinder wall opening and a piston wall opening which, in the filling position of the piston, are located opposite each other and define an open valve, and, in a non-filling position, are closed by the piston wall and the cylinder wall, respectively, and define a closed valve; and a pneumatic piston end-position control device which comprises: a control pressure accumulator in the piston, wherein the control pressure accumulator is connected with a control pressure accumulator piston wall opening in the piston wall, a constant-pressure gas source connected via a line with a cylinder wall opening which defines together with the control pressure accumulator piston wall opening a control valve and, in the filling position of the piston, is located opposite the control pressure accumulator piston wall opening, and a line between the cylinder pressure space and a cylinder wall opening which together with the control pressure accumulator piston wall opening defines a discharge valve and, during a cycle in a non-filling position of the piston, is located opposite the control pressure accumulator opening. 14. A stirling cooler comprising: a cold finger, and a piston compressor according to claim 1, wherein: the cold finger comprises a displacer piston in a cold finger cylinder housing, the cold finger comprises a compressed-gas accumulator and gas bearing nozzles connected therewith for supporting the displacer piston, the cold finger compressed-gas accumulator is connected via a cold finger gas supply line with the piston compressor compressed-gas accumulator, and in the cold finger gas supply line, a valve is arranged which is defined by a piston wall opening and a wall opening of the piston compressor and is opened when the piston compressor piston is in the filling position. 15. The piston compressor according to claim 1, further including: an associated supply line connected with the compressed gas accumulator and adapted for connection with an associated device. 16. A piston compressor including: a cylinder housing which forms a cylinder wall that defines a cylinder; a piston which oscillates in the cylinder and, in a filling position, compresses gas in a cylinder pressure space, the piston defining a piston wall which faces the cylinder wall; gas bearing nozzles arranged adjacent the piston for gas-supporting the piston; a compressed-gas accumulator connected with the gas bearing nozzles; a compressed-gas supply line between the cylinder pressure space and the compressed-gas accumulator; an inlet valve in the compressed-gas supply line, the inlet valve being open in the filling position of the piston the inlet valve being defined by a cylinder wall opening and a piston wall opening which, in the filling position of the piston, are located opposite each other and define an open valve state, and, in a non-filling position, are closed by the piston wall and the cylinder wall, respectively, and define a closed valve state an associated device supply line connected with the compressed gas accumulator; an associated device accumulator connected with the associated device supply line, and an associated device air bearing connected with the associated device accumulator. 17. The piston compressor according to claim 16, further including: an associated device piston supported by the associated device air bearings. 18. The piston compressor according to claim 17 wherein the associated device is a cold finger.
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이 특허에 인용된 특허 (16)
Heinzl Joachim (Munich DEX) Lehmann Manfred (Puchheim DEX) Zehentbauer Hans (Germering DEX), Aerostatic bearing.
Claudet Grard (La Tronche FRX) Dewanckel Bernard (Meylan FRX) Ravex Alain (Meylan FRX) Reale Serge (Grenoble FRX), Refrigerator, more particularly with Vuilleumier cycle, comprising pistons suspended by gas bearings.
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