Temperature control system for a cryogenic refrigeration
US5018357A · kind A · utility
89Cited by
12References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1990 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/13
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a cryogenic refrigeration utilizing a linear drive motor, a temperature control system controls the displacement of an armature reciprocating at a fixed frequency to adjust the operating temperature of a working fluid at the cold end of a cold finger. Linear drive motors using dynamic absorbers to reduce vibration operate within the narrow frequency range to which the absorber is tuned. Controlling the maximum displacement of the armature used to compress the working fluid results in the ability to adjust the temperature at the cold end of the refrigeration without altering the frequency of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.