Apparatus and method for regulating temperature in a cryogenic test chamber
US5647228A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1996 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Jul 12, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2250/0631
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A dual capillary inlet cryogenic test chamber having the ability to continuously regulate temperature between about 1.5 K. and 400 K. A controllably heated capillary tube is located in the cryogenic reservoir, spaced from the test chamber and thermally insulated from the cryogen. This capillary tube has a characteristic impedance to fluid flow. A second low temperature, high impedance capillary tube inlet is also in the cryogenic reservoir and is connected between the cryogen reservoir and the test chamber. The combination of a control system with pressure and temperature feedback, combined with the two inlet tubes of different impedance, enables the apparatus to operate continuously and stably at any temperature within its operating range, or to smoothly sweep through any predetermined temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.