A low-temperature refrigeration system with one-time throttling for precooling by utilizing the energy separation effect of vortex tubes

Abstract

A throttling low-temperature refrigeration system for precooling using the energy separation effect of a vortex tube, comprising a compressor, a regenerator, a throttle valve and an evaporator, characterized in that the regenerator includes a first regenerator and a second regenerator The heater also includes a three-way flow regulating valve and a vortex tube, the outlet of the compressor is connected with the inlet of the three-way flow regulating valve, and the first outlet of the three-way flow regulating valve is connected with the hot end inlet of the first regenerator , the second outlet is connected with the inlet of the vortex tube, the outlet of the cold end of the vortex tube is merged with the outlet of the hot end of the second regenerator, and then connected with the inlet of the cold end of the first regenerator, the first regenerator The outlet of the hot end of the compressor is connected with the inlet of the compressor. The one-throttle low-temperature refrigeration system precooled by the energy separation effect of the vortex tube has a simple structure, can adopt internal precooling, and has high refrigeration efficiency.

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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