초록 ▼

Disclosed is a method and apparatus for a magnetic refrigeration system. A continuously reciprocating displacer houses at least a pair of paramagnetic substances each of which is alternately driven into and out of a magnetic field. Two separate bidirectional pumping systems flow helium gas through t

Disclosed is a method and apparatus for a magnetic refrigeration system. A continuously reciprocating displacer houses at least a pair of paramagnetic substances each of which is alternately driven into and out of a magnetic field. Two separate bidirectional pumping systems flow helium gas through the displacer and through both paramagnetic substances to create heat exchange conditions at two separate temperature extremes.

대표청구항 ▼

A method of operating a magnetic refrigerator having an object to be cooled at one temperature extreme in heat transfer relationship to a fluid medium, a heat sink adapted for heat transfer with a fluid medium at a second and higher temperature extreme, and a magnetic coil for producing a localized

A method of operating a magnetic refrigerator having an object to be cooled at one temperature extreme in heat transfer relationship to a fluid medium, a heat sink adapted for heat transfer with a fluid medium at a second and higher temperature extreme, and a magnetic coil for producing a localized magnetic field, the method comprising the steps of: coaxially aligning at least a pair of spaced paramagnetic substances on a movable displacer; warming one of the paramagnetic substances by placing it in a constantly energized magnetic field while cooling the other paramagnetic substance to a lower temperature than the first by locating it outside the localized magnetic field; and simultaneously flowing two separate fluid medium streams through both of the paramagnetic substances for achieving a heat exchange at both of said temperature extremes.