Refrigerator having regenerator
US5481879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Jun 28, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2309/003
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A refrigerator with a regenerator having a good and stable cooling function comprises: a cylinder having a circular inner surface and being made of a material having a low heat conductivity and a high hermetic sealing performance; a displacer having a circular outer surface having a slightly smaller diameter than the inner surface of the cylinder, forming a main gas passage there through, and containing regeneration material therein, the displacer being disposed in the cylinder to be reciprocally movable in the axial direction the cylinder and forming an expansion space at one end of the cylinder; a groove pattern formed on one of the outer surface of the displacer and the inner surface of the cylinder, for forming an auxiliary gas passage for supplying gas into and recovering the gas from the expansion space, the groove pattern including a groove at least partially formed along the direction intersecting the axial direction of the displacer, such as a helical groove, the groove allowing a gas flowing through a gap between the cylinder and the displacer from one end to the other end of the displacer to positively heat-exchange with the cylinder and the displacer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.