| 摘要 |
PCT No. PCT/FR89/00034 Sec. 371 Date Sep. 25, 1989 Sec. 102(e) Date Sep. 25, 1989 PCT Filed Feb. 2, 1989.Process and apparatus for obtaining very low temperatures by making use of the endothermic dissolution of 3He in 4He. A mixing box placed in a vacuum enclosure cooled to approximately 2 DEG K. or less receives continuously liquid 3He and 4He via separate conduits. The solution produced is extracted therefrom via a third conduit at a rate such that, bearing in mind the diameter of the conduit, 3He cannot diffuse countercurrentwise in the solution sufficiently to raise appreciably the content of 3He in the liquid 4He introduced and to reduce the dissolution in this 4He of the liquid 3He introduced simultaneously.
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