Refrigerating system capable of recycling expansion work

By integrating the expansion piston of the regenerative refrigeration unit and the compression piston of the compression refrigeration unit into the JT throttling refrigerator, the expansion work is recovered and the power is supplied, solving the problems of low system integration and low energy utilization efficiency, and achieving efficient and stable low-temperature refrigeration.

CN122015318AActive Publication Date: 2026-05-12PIEDMONT MEDSYST ZHUHAI CO LTD
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Patent Information

Application Number
CN202610459986.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-09
Publication Date
2026-05-12
Estimated Expiration
2046-04-09

AI Technical Summary

Technical Problem

Traditional JT throttling refrigeration systems have low integration and low energy utilization efficiency, failing to effectively recover the expansion work of regenerative refrigeration systems to drive JT compressors.

Method used

The expansion piston of the regenerative refrigeration unit is coupled with the compression piston of the compression refrigeration unit. The expansion work of the regenerative refrigeration unit is converted into the power of the compression refrigeration unit through a phase-coordinated control system. Combined with the heat absorber, the refrigerant in the heat exchanger of the precooling section is precooled, thus realizing the integrated coupling of precooling and power supply.

Benefits of technology

It improves the energy utilization efficiency and integration of the refrigeration system, reduces external energy input, shrinks the system size, and enables long-term stable operation in low-temperature environments.

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Abstract

The refrigerating system comprises a compression type refrigerating unit and a regenerative refrigerating unit, the compression type refrigerating unit comprises a compressor, a high-pressure gas pipeline, a precooling section heat exchanger, an expansion device, a cold end heat exchanger and a low-pressure gas pipeline, and the compressor comprises a compression cavity A and a compression piston sliding in the compression cavity A; the regenerative refrigeration unit comprises a pressure wave generator, a heat radiator, a heat regenerator, a heat absorber and a pressure wave transmission pipe, the heat absorber serves as a cold head to precool a refrigerant in the precooling section heat exchanger, and a slidable expansion piston is arranged in the pressure wave transmission pipe; a compression piston of the compression type refrigeration unit and an expansion piston of the regenerative refrigeration unit are coupled into a whole and slide in a compression cavity A to compress a refrigerant in the compression cavity A, expansion work of the regenerative refrigeration unit is converted into compression power of the compression type refrigeration unit, external energy input of the refrigeration system is reduced, and the energy utilization efficiency is improved.
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