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US 10,551,092 B2Granted
Pulse-tube refrigerator
AssigneesZhejiang University, Sumitomo Heavy Industries, Ltd.
InventorsXiao Jiang, Limin Qiu
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Abstract
A refrigerator includes a regenerator, a low-temperature end heat exchanger, a pulse tube, a high-temperature end heat exchanger, and a phase adjustment mechanism, connected in that order. A draft tube is provided inside the regenerator, paralleling the regenerator's axis, and the draft tube can extend into the low-temperature end heat exchanger.
Claims11
A pulse-tube refrigerator, comprising:
- an axially oriented regenerator, a low-temperature end heat exchanger, a pulse tube, a high-temperature end heat exchanger, and a phase adjustment mechanism, connected in that order;
- and
- a hollow draft tube comprising a regenerator draft-tube segment provided inside the regenerator, paralleling the regenerator's axial orientation,
- wherein right-angled cross-sections through any locus on the regenerator draft-tube segment are of identical planar area, and the planar area is 1/20 to 1/2 the regenerator's right-angled cross-sectional area,
- wherein:
- the regenerator draft-tube segment extends into a pulse-tube draft-tube segment of the hollow draft tube located inside the pulse tube, and
- right-angled cross-sections through any locus on the pulse-tube draft-tube segment are of identical planar area, and the planar area is 1/20 to 1/2 the pulse-tube's right-angled cross-sectional area,
- wherein:
- the right-angled cross-sectional area of the pulse-tube draft-tube segment is smaller than the right-angled cross-sectional area of the regenerator draft-tube segment;
- and
- a heat-exchanger low-temperature-end draft-tube segment of the hollow draft tube is provided in between the regenerator draft-tube segment and the pulse-tube draft-tube segment;
- and
- cross sections on either end of the heat-exchanger low-temperature-end draft-tube segment respectively match cross sections of the regenerator draft-tube segment and the pulse-tube draft-tube segment.
10 more elements
Dependencies are inferred from the claim text.