Apparatus for maintaining electronic equipment and the like at low temperatures in hot ambient environments
US4559790A · kind A · utility
21Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1982 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Oct 18, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2270/0509
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Electronic equipment and the like, particularly electronic equipment used in oil well logging, is kept cool by placing it in a container inside a vacuum dewar filled with a vaporizable fluid such as water. As the water evaporates, it removes heat from the dewar. The water vapor is absorbed inside a canister filled with a water-absorbing material. A thermostatically-controlled valve is provided to limit water vaporization when not required for cooling, thus greatly extending the life of a single charge of cooling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.