Title:
DILUTION REFRIGERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/088648
Kind Code:
A1
Abstract:
The invention relates to a dilution refrigeration device for obtaining very low temperatures, in particular in the range comprised between one millikelvin and one hundred millikelvins, comprising a looped working circuit (20) containing a cycle fluid comprising a mixture of helium isotope 3 (3He) and helium isotope 4 (4He), the working circuit (20) comprising, arranged in series and fluidly connected via a first set of pipes (2, 12, 4), a mixing chamber (3), a boiler (5) and a transfer member (6), the first set of pipes (2, 12, 4) being configured to transfer the cycle fluid from an outlet of the mixing chamber (3) to an inlet of the boiler (5) and from an outlet of the boiler (5) to an inlet of the transfer member (6), the working circuit (20) comprising a second set of pipes (7, 17) connecting an outlet of the transfer member (6) to an inlet of the mixing chamber (3), the working circuit (20) comprising at least a first section (9) for exchanging heat between at least part of the first set of pipes (2, 12) and the second set of pipes (7, 17), the first heat exchange section (9) comprising at least one heat exchanger located between the boiler (5) and the mixing chamber (3), characterised in that the first set of pipes comprises, between the mixing chamber (3) and the boiler (5), a first portion having a plurality of first pipe branches (12) arranged in parallel, subdividing the cycle flow into a plurality of parallel flows, and in that the second set of pipes comprises, between the boiler (5) and the mixing chamber (3), a second portion of a plurality of second pipe branches (17) arranged in parallel, subdividing the cycle flow into a plurality of parallel flows, and in that the first heat exchange section (9) comprises a plurality of counterflow heat exchangers (19, 29) each providing heat exchange between a first pipe branch (12) of the first portion and a second pipe branch (17) of the second portion.
Inventors:
GUIA OLIVIER (FR)
Application Number:
PCT/EP2022/079869
Publication Date:
May 25, 2023
Filing Date:
October 26, 2022
Export Citation:
Assignee:
AIR LIQUIDE (FR)
International Classes:
F25B9/12; F25D19/00
Foreign References:
| FR3107586A1 | 2021-08-27 | |||
| US3922881A | 1975-12-02 | |||
| JP2001304709A | 2001-10-31 |
Attorney, Agent or Firm:
DE CUENCA, Emmanuel (FR)
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