Cryogenic temperature cool storage device and refrigerator

An extremely low temperature, regenerator technology, applied in refrigerators, gas cycle refrigerators, compressors, etc., can solve the problems of insufficient specific heat, insufficient refrigeration capacity, and high manufacturing cost of metal-based magnetic regenerator materials, and achieve improvement. The effect of freezing performance

CN1643310AInactive Publication Date: 2005-07-20SUMITOMO HEAVY IND LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2005-07-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The refrigeration performance in a range from 3 to 10 K can be improved in comparison with conventional metal based magnetic regenerator materials. The refrigerator is provided with a regenerator utilizing at least one magnetic material including a rare earth element and sulfur as the regenerator material.
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Description

technical field

[0001] The present invention relates to extremely low temperature regenerators and freezers (also known as refrigerators), in particular to GM (Gifford-McMahon) cycle freezers, Stirling cycle freezers, pulse Tube freezer, Vuilleumier cycle freezer, Solvay cycle freezer, Ericsson cycle freezer, or very low temperature storage with improved freezing capacity using appropriate new storage materials Refrigerators and refrigerators, refrigeration systems using them, refrigerant generating devices, recondensing devices, superconducting magnet devices, superconducting element cooling devices, cryogenic panels, cryogenic heat shields, cooling devices in the field of space technology, etc. Background technique

[0002] In conventional cold storage type ultra-low temperature refrigerators, Er 3 Ni and HoCu 2 Metal-based magnetic cold storage materials, etc., realize freezing at a temperature of 10K or below (Japanese Patent Laid-Open No. 5-71816).

[0003] However, ...

Examples

Embodiment Construction

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0050] The first embodiment of the present invention is as Figure 4 (overall picture), Figure 5 (detailed drawing of the cooling unit) and Figure 6 As shown in (Cross-sectional view of two-stage regenerator), the present invention is applied to a two-stage GM refrigerator.

[0051] exist Figure 4 Among them, the high-pressure gas from the compressor 11 is supplied to the two-stage GM refrigerator 1 through the high-pressure gas piping 12 , and is recovered to the low-pressure port of the compressor 11 through the low-pressure gas piping 13 . Such as Figure 5 As shown, the first-stage regenerator 2 and the second-stage regenerator 3 housed in the first-stage hydraulic cylinder 25 and the second-stage hydraulic cylinder 35, respectively, are Figure 4 The drive motor 14 shown is driven to reciprocate up and down.

[0052] Cold storage materials 24, 34...