Pulse tube refrigerating machine

• US 20070000257A1
• Filed: 03/25/2004
• Published: 01/04/2007
• Est. Priority Date: 03/26/2003
• Status: Abandoned Application

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.), Central Japan Railway Company
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.), Central Japan Railway Company
• Inventors: Okutomi, Takeshi, Kuwano, Katsuyuki, Mita, Hideo, Igarasi, Motohiro, Yamada, Toyohisa
• Application Number:
  US10/550,526
• Publication Number:
  US 20070000257A1
• Time in Patent Office: Days
• US Class Current: 62/6
• CPC Class Codes: F25B 2309/1408 Pulse-tube cycles with pulse tube having U-turn or L-turn type geometrical arrangements
• CPC Class Codes: F25B 2309/1412 Pulse-tube cycles characterised by heat exchanger details
• CPC Class Codes: F25B 2309/1417 Pulse-tube cycles without any valves in gas supply and return lines
• CPC Class Codes: F25B 2309/1418 Pulse-tube cycles with valves in gas supply and return lines
• CPC Class Codes: F25B 2309/1423 Pulse tubes with basic schematic including an inertance tube
• CPC Class Codes: F25B 9/10 with several cooling stages
• CPC Class Codes: F25B 9/145 pulse-tube cycle
• CPC Class Codes: F25D 19/006 Thermal coupling structure or interface

Abstract

To provide a pulse tube refrigerator for enhancing refrigeration capacity. A pulse tube refrigerator includes a pressure-waveform generating device 1 for generating a pressure waveform of refrigerant gas, pulse tubes 14, 20 into which refrigerant gas with pressure waveforms flow, one of whose ends is adapted to a low-temperature end, and the other one of whose ends is adapted to a high-temperature end, cold accumulators 8, 10 for pre-cooling the refrigerant gas to be flowed into the pulse tubes 14, 20, a pressure-waveform phase controlling element having a buffer tank 23 communicating with the high-temperature end of the pulse tube 20, and controlling a pressure-waveform phase of the refrigerant gas for generating refrigeration at the low-temperature end of the pulse tube 20, and a vacuum heat-insulation bath 24 having a vacuum heat-insulation chamber 24w for accommodating the pulse tube 20. The buffer tank 23 is placed within the vacuum heat-insulation chamber 24w of the vacuum heat-insulation bath 24.

Claims

1. A pulse tube refrigerator, comprising:

a pressure-waveform generating device for generating a pressure waveform of refrigerant gas;

a pulse tube into which refrigerant gas with the pressure waveform generated by said pressure-waveform generating device flows, one of whose ends is adapted to a low-temperature end, and the other one of whose ends is adapted to a high-temperature end;

a cold accumulator disposed between said pressure-waveform generating device and said pulse tube, and pre-cooling the refrigerant gas to be flowed into said pulse tube;

a pressure-waveform phase controlling element having a buffer tank communicating with the high-temperature end of said pulse tube, and controlling a pressure-waveform phase of the refrigerant gas for generating refrigeration at the low-temperature end of said pulse tube; and

a vacuum heat-insulation bath having a vacuum heat-insulation chamber for accommodating said pulse tube,

wherein the pulse tube refrigerator is characterized in that said buffer tank is placed within said vacuum heat-insulation chamber of said vacuum heat-insulation bath.

2. A pulse tube refrigerator, comprising:

a pressure-waveform generating device for generating a pressure waveform of refrigerant gas;

a pulse tube into which refrigerant gas with the pressure waveform generated by said pressure-waveform generating device flows, one of whose ends is adapted to a low-temperature end, and the other one of whose ends is adapted to a high-temperature end;

a cold accumulator disposed between said pressure waveform generating device and said pulse tube, and pre-cooling the refrigerant gas to be flowed into said pulse tube;

a pressure-waveform phase controlling element having an inertance tube communicating with the high-temperature end of said pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said pulse tube, a buffer tank communicating with the high-temperature end of said pulse tube by way of said inertance tube, and controlling a pressure-waveform phase of the refrigerant gas for generating refrigeration at the low-temperature end of said pulse tube; and

a vacuum heat-insulation bath having a vacuum heat-insulation chamber for accommodating said pulse tube,

wherein the pulse tube refrigerator is characterized in that said inertance tube is placed within said vacuum heat-insulation chamber of said vacuum heat-insulation bath.

3. A pulse tube refrigerator, comprising:

a pressure-waveform generating device for generating a pressure waveform of refrigerant gas;

a first pulse tube into which refrigerant gas with the pressure waveform generated by said pressure-waveform generating device flows, one of whose ends is adapted to a low-temperature end, and the other one of whose ends is adapted to a high-temperature end;

a second pulse tube into which refrigerant gas with a pressure waveform flows, one of whose ends is adapted to a low-temperature end, the low-temperature end becoming a lower temperature than the low-temperature end of said first pulse tube, and the other one of whose ends is adapted to a high-temperature end;

a cold accumulator disposed between said pressure-waveform generating device, said first pulse tube and said second pulse tube, and pre-cooling the refrigerant gas to be flowed into said first pulse tube and/or said second pulse tube;

a pressure-waveform phase controlling element having a first inertance tube communicating with the high-temperature end of said first pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said first pulse tube, a first buffer tank communicating with the high-temperature end of said first pulse tube by way of said first inertance tube, a second inertance tube communicating with the high-temperature end of said second pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said second pulse tube, and a second buffer tank communicating with the high-temperature end of said second pulse tube by way of said second inertance tube, and controlling pressure-waveform phases of the refrigerant gas for generating refrigeration; and

a vacuum heat-insulation bath having a vacuum heat-insulation chamber for accommodating said second pulse tube at least,

wherein a cooling element contacting thermally with the low-temperature end of said first pulse tube and being cooled by refrigeration from the low-temperature end of said first pulse tube is disposed, and said cooling element is brought into contact with said second inertance tube thermally.

4. A pulse tube refrigerator, comprising:

a pressure-waveform generating device for generating a pressure waveform of refrigerant gas;

a first pulse tube into which refrigerant gas with the pressure waveform generated by said pressure-waveform generating device flows, one of whose ends is adapted to a low-temperature end, and the other one of whose ends is adapted to a high-temperature end;

a second pulse tube into which refrigerant gas with a pressure waveform flows, one of whose ends is adapted to a low-temperature end, the low-temperature end becoming a lower temperature than the low-temperature end of said first pulse tube, and the other one of whose ends is adapted to a high-temperature end;

a cold accumulator disposed between said pressure-waveform generating device, said first pulse tube and said second pulse tube, and pre-cooling the refrigerant gas to be flowed into said first pulse tube and/or said second pulse tube;

a pressure-waveform phase controlling element having a first inertance tube communicating with the high-temperature end of said first pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said first pulse tube, a first buffer tank communicating with the high-temperature end of said first pulse tube by way of said first inertance tube, a second inertance tube communicating with the high-temperature end of said second pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said second pulse tube, and a second buffer tank communicating with the high-temperature end of said second pulse tube by way of said second inertance tube, and controlling pressure-waveform phases of the refrigerant gas for generating refrigeration; and

a vacuum heat-insulation bath having a vacuum heat-insulation chamber for accommodating said second pulse tube at least,

wherein a cooling element contacting thermally with the low-temperature end of said first pulse tube and being cooled by refrigeration from the low-temperature end of said first pulse tube is disposed, and said cooling element is brought into contact with said second buffer tank thermally.

5. A pulse tube refrigerator, comprising:

a pressure-waveform generating device for generating a pressure waveform of refrigerant gas;

a first pulse tube into which refrigerant gas with the pressure waveform generated by said pressure-waveform generating device flows, one of whose ends is adapted to a low-temperature end, and the other one of whose ends is adapted to a high-temperature end;

a second pulse tube into which refrigerant gas with a pressure waveform flows, one of whose ends is adapted to a low-temperature end, the low-temperature end becoming a lower temperature than the low-temperature end of said first pulse tube, and the other one of whose ends is adapted to a high-temperature end;

a cold accumulator disposed between said pressure-waveform generating device, said first pulse tube and said second pulse tube, and pre-cooling the refrigerant gas to be flowed into said first pulse tube and said second pulse tube;

a pressure-waveform phase controlling element having a first inertance tube communicating with the high-temperature end of said first pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said first pulse tube, a first buffer tank communicating with the high-temperature end of said first pulse tube by way of said first inertance tube, a second inertance tube communicating with the high-temperature end of said second pulse tube and having a flow passage with a smaller inside diameter than an inside diameter of said second pulse tube, and a second buffer tank communicating with the high-temperature end of said second pulse tube by way of said second inertance tube, and controlling pressure-waveform phases of the refrigerant gas for generating refrigeration; and

a vacuum heat-insulation bath having a vacuum heat-insulation chamber for accommodating said second pulse tube at least,

wherein at least a part of said second inertance tube is brought into contact with the low-temperature end of said first pulse tube thermally.