Gas-liquid separator for auto-cascade refrigeration system and auto-cascade refrigeration system

Abstract

The invention discloses a gas-liquid separator for an auto-cascade refrigeration system and the auto-cascade refrigeration system.The gas-liquid separator comprises a shell and a heat exchange cylinder, and the shell is provided with a high-temperature and high-pressure mixed medium inlet, a low-boiling-point gas outlet, a high-boiling-point liquid outlet, a low-temperature and low-pressure mixed medium inlet and a low-temperature and low-pressure mixed medium outlet; the high-temperature and high-pressure mixed medium inlet and the low-boiling-point gas outlet are both formed above the high-boiling-point liquid outlet, the heat exchange cylinder is arranged in the shell, the heat exchange cylinder and the shell are spaced in the inside-outside direction, and a separation cavity is defined between the heat exchange cylinder and the shell; the high-temperature and high-pressure mixed medium inlet, the low-boiling-point gas outlet and the high-boiling-point liquid outlet are all communicated with the separation cavity, and the low-temperature and low-pressure mixed medium inlet and the low-temperature and low-pressure mixed medium outlet are both communicated with the heat exchange cylinder. The gas-liquid separator for the auto-cascade refrigeration system has the advantages of being simple in structure, good in gas-liquid separation effect and the like.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a gas-liquid separator for a self-cascading refrigeration system and the self-cascading refrigeration system. Background technique [0002] In recent years, with the continuous development of science and technology and the continuous improvement of people's living standards, in the fields of biological science, medical treatment, food, chemical industry, national defense, etc., people's demand for ultra-low temperatures below -40°C has become stronger and stronger. The self-cascading refrigeration cycle is widely used in industrial fields from -190°C to -40°C due to its simple structure and high operating efficiency. Compared with the traditional cascade refrigeration cycle or two-stage compression refrigeration cycle, the self-cascade refrigeration cycle uses an automatic condensing system, which uses one or more compressors less than other refrigeration cycles i...

AI Technical Summary

Problems solved by technology

However, in the self-cascading refrigeration cycle, a rectification device is generally used to separate the gas-liquid phase. This method has the problems of poor separation effect and complex structure, and the heat exchanger and gas-liquid separator are set separately, which increases the cost of the refrigeration system. volume of

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