초록 ▼

A magnetic refrigerator operating in the 4 to 20 K range utilizes heat pipes to transfer heat to and from the magnetic material at the appropriate points during the material\s movement. In one embodiment circular disks of magnetic material can be interleaved with the ends of the heat pipes. In anoth

A magnetic refrigerator operating in the 4 to 20 K range utilizes heat pipes to transfer heat to and from the magnetic material at the appropriate points during the material\s movement. In one embodiment circular disks of magnetic material can be interleaved with the ends of the heat pipes. In another embodiment a mass of magnetic material reciprocatingly moves between the end of the heat pipe of pipes that transmits heat from the object of cooling to the magnetic material and the end of the heat pipe or pipes that transmits heat from the magnetic material to a heat sink.

대표청구항 ▼

An about 4 to about 20 K. refrigeration apparatus comprising: a magnetic field generating means; a fluid contactable magnetic material interacting with the magnetic field produced by said magnetic field generating means so as to be subjected to a cyclically time varying magnetic field; a fluid effec

An about 4 to about 20 K. refrigeration apparatus comprising: a magnetic field generating means; a fluid contactable magnetic material interacting with the magnetic field produced by said magnetic field generating means so as to be subjected to a cyclically time varying magnetic field; a fluid effective to transfer heat at temperatures between about 4 and about 20 K.; an external heat sink; and at least two directional heat pipes, one such pipe disposed between said fluid and the object of cooling whereby heat from the object of cooling is transmitted through said fluid to said magnetic material when said magnetic material absorbs heat, and another such pipe disposed between said fluid and said external heat sink whereby heat from said magnetic material when said magnetic material is rejecting heat is transmitted through said fluid to said external heat sink, and also whereby the heat from the hot ends of said directional heat pipes is minimally transmitted to the cold ends of said directional heat pipes.