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AssigneesKabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
InventorsTomohiro Yamashita, Takahiro Kawamoto, Tomoko Eguchi, Takashi Kuboki
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A method may produce a two-stage heat regenerating cryogenic refrigerator including a vacuum vessel, first and second cylinder disposed in the vessel, the second cylinder coaxially connected to the first cylinder, and first and second regenerator respectively disposed in the first and second cylinder. The method may include: accommodating a first heat regenerating material (HRM) in the first regenerator; and filling a plurality of HRM particles in the second regenerator. The HRM particles may be a second HRM, each of the HRM particles including an oxide or oxysulfide heat regenerating substance having a maximum value of specific heat at a temperature of ≤20 K of 0.3+ J/cm3·K and Ca, Mn, Mg, Be, Sr, Al, Fe, Cu, Ni, and/or Co. Each of the HRM particles may include a first and second region, the second region being closer to an HRM particle outer edge than the first region.
A method for producing a two-stage heat regenerating cryogenic refrigerator, the two-stage heat regenerating cryogenic refrigerator including a vacuum vessel, a first cylinder disposed in the vessel, a second cylinder disposed in the vessel and coaxially connected to the first cylinder, a first regenerator disposed in the first cylinder, and a second regenerator disposed in the second cylinder, the method comprising:
A method for producing a two-stage heat regenerating cryogenic refrigerator, the two-stage heat regenerating cryogenic refrigerator including a vacuum vessel, a first cylinder disposed in the vessel, a second cylinder disposed in the vessel and coaxially connected to the first cylinder, a first regenerator disposed in the first cylinder, and a second regenerator disposed in the second cylinder, the method comprising:
Dependencies are inferred from the claim text.