Pulse tube refrigerator
AssigneeAisin Seiki Kabushiki Kaisha
InventorsShaowei Zhu, Masahumi Nogawa, Shin Kawano, Tatsuo Inoue
Life of this patent
Estimating the term…
Abstract
In a pulse tube refrigerator the refrigeration efficiency has been improved by reducing the on-off valve loss. A second space 47 in a cylinder member 41 is connected with a second high pressure on-off valve 23 and a second low pressure on-off valve 24. A buffer side on-off valve 25 is provided between the buffer space (a buffer tank 50) and the second space 47. By opening the buffer side on-off valve 25 before the second high pressure on-off valve 23 or the second low pressure on-off valve 24 is open, the pressure in the second space 47 can be the intermediate pressure. Since the pressure difference when the valves are open is decreased, the on-off valve loss can be decreased.
Claims12
A pulse tube refrigerator comprising:
- a compressor;
- a first high pressure on-off valve and a second high pressure on-off valve connected with a high pressure outlet port of the compressor;
- a first low pressure on-off valve and a second low pressure on-off valve connected with a low pressure inlet port of the compressor;
- a cryocooler comprising a regenerator, a cold head and a pulse tube arranged in series in line and connected with the first high pressure on-off valve and the first low pressure on-off valve at the regenerator;
- a cylinder member connected with the pulse tube at one end, and connected with the second high pressure on-off valve and the second low pressure on-off valve at the other end;
- a piston arranged in the cylinder member, the piston separating an interior of the cylinder into a first space connected with an inner space of the pulse tube and a second space connected with both the second high pressure on-off valve and the second low pressure on-off valve;
- a buffer connected with the second space;
- and
- a buffer side on-off valve provided between the buffer and the second space.
A pulse tube refrigerator comprising:
- a compressor;
- a first high pressure on-off valve and a second high pressure on-off valve connected with a high pressure outlet port of the compressor;
- a first low pressure on-off valve and a second low pressure on-off valve connected with a low pressure inlet port of the compressor;
- a cryocooler comprising a regenerator, a cold head and a pulse tube arranged in series in line and connected with the first high pressure on-off valve and the first low pressure on-off valve at the regenerator;
- a cylinder member connected with the pulse tube at one end, and connected with the second high pressure on-off valve and the second low pressure on-off valve at the other end;
- a piston arranged in the cylinder member, the piston separating an interior of the cylinder into a first space connected with an inner space of the pulse tube and a second space connected with both the second high pressure on-off valve and the second low pressure on-off valve;
- and
- means for buffering a pressure of a gas in said second space.
A pulse tube refrigerator comprising:
- a compressor;
- a first high pressure on-off valve and a second high pressure on-off valve connected with a high pressure outlet port of the compressor;
- a first low pressure on-off valve and a second low pressure on-off valve connected with a low pressure inlet port of the compressor;
- a cryocooler comprising a regenerator, a cold head and a pulse tube arranged in series in line and connected with the first high pressure on-off valve and the first low pressure on-off valve at the regenerator;
- means for isolating a gas in the cryocooler from the second high pressure on-off valve and the second low pressure on-off valve;
- and
- means for buffering a pressure of a gas at the second high pressure on-off valve and the second low pressure on-off valve.
A pulse tube refrigerator comprising:
- a compressor;
- a first high pressure on-off valve and a second high pressure on-off valve connected with a high pressure outlet port of the compressor;
- a first low pressure on-off valve and a second low pressure on-off valve connected with a low pressure inlet port of the compressor;
- a cryocooler connected with the first high pressure on-off valve and the first low pressure on-off valve;
- means for isolating a gas in the cryocooler from the second high pressure on-off valve and the second low pressure on-off valve;
- and
- means for buffering a pressure of a gas at the second high pressure on-off valve and the second low pressure on-off valve.
Dependencies are inferred from the claim text.