Primary throttling low-temperature refrigeration system pre-cooled by utilizing the vortex tube energy separation effect

Abstract

The invention discloses a primary throttling low-temperature refrigeration system pre-cooled by utilizing the vortex tube energy separation effect. The system comprises a compressor, heat regenerators, a throttling valve and an evaporator, and is characterized in that the heat regenerator comprises a first heat regenerator and a second heat regenerator; the system further comprises a three-way flow regulating valve and a vortex tube; an outlet of the compressor communicates with an inlet of the three-way flow regulating valve, a first outlet of the three-way flow regulating valve communicateswith a hot end inlet of the first heat regenerator, and a second outlet of the three-way flow regulating valve communicates with an inlet of the vortex tube; a cold end outlet of the vortex tube and ahot end outlet of the second heat regenerator are combined into one path to communicate with a cold end inlet of the first heat regenerator; and a hot end outlet of the first heat regenerator communicates with an inlet of the compressor. The primary throttling low-temperature refrigeration system pre-cooled by utilizing the vortex tube energy separation effect has the advantages that structure issimple, internal pre-cooling can be adopted, and the refrigerating efficiency is high.

Description

technical field [0001] The invention relates to the technical field of low-temperature refrigeration, in particular to a throttling low-temperature refrigeration system for precooling by utilizing the energy separation effect of a vortex tube. Background technique [0002] With the development of science and technology, the application range and demand of small cryogenic refrigerators in different fields are becoming wider and wider, such as aerospace, national defense and military industry, low-temperature superconductivity, medical equipment, and transportation. According to different refrigeration methods, the currently widely used small cryogenic refrigerators can be divided into many different types, such as throttling refrigerators, GM refrigerators, Stirling refrigerators, and pulse tube refrigerators. Among them, throttling refrigeration technology is the earliest developed and applied mature refrigeration technology in low temperature refrigeration technology. effe...

AI Technical Summary

Problems solved by technology

[0004] However, the existing once throttling low-temperature refrigeration system still has the following technical problems: the direct use of the throttling low-temperature and low-pressure precooling gas needs to pass through the regenerator 2a, the throttle valve 3a, and the evaporator 4a to the regenerator 2a. The working fluid is pre-cooled, and the pre-cooling effect that can be achieved is limited. To obtain a lower refrigeration temperature, a larger compressor pressure ratio is required.

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