Pulse tube expander having a porous plug phase shifter
US6393844B1 · kind B1 · utility
2Cited by
14References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Aug 22, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2309/1424
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A pulse tube expander includes a regenerator, a pulse tube, a porous plug phase shifter, and a surge tank, in series gaseous communication with each other. The porous plug phase shifter is made of a porous material such as a sintered mass or a packed solid bed of distinct, free-flowing bodies. The porous plug phase shifter introduces a phase shift between the pressure wave and the mass flow rate in the pulse tube expander. The porous plug phase shifter is resistant to clogging due to contamination that may be present in the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.