Magnetic refrigerating apparatus
US4554790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1985 |
| Grant date | Nov 26, 1985 |
| Priority date | — |
| Expiry date | Feb 13, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/891
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A magnetic refrigerating apparatus comprises two pairs of superconductive coils for generating magnetic fields, a tank for receiving helium to be cooled, and a pair of heat absorbers each including a working substance adapted to generate heat when located inside the magnetic field generated by the coils and to absorb heat when located outside the magnetic field. The heat absorbers are alternately transferred between a first position where either of the heat absorbers is located inside the magnetic field and a second position where the heat absorber is located outside the magnetic field so that one of the heat absorbers is in the first position when the other is in the second position, whereby helium is cooled by either of the heat absorbers when the heat absorber is in the second position. The heat absorbers each include working substance pieces arranged at regular intervals along the direction of transfer thereof, and adiabatic spacers each interposed adjacent pieces to prevent direct contact between the pieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.