Four-stage cascade refrigerating device with multi-stage water cooler

Abstract

The invention relates to the field of cascade refrigeration, and provides a four-stage cascade refrigerating device with a multi-stage water cooler. The four-stage cascade refrigerating device cascades by four pieces of relatively independent refrigerating circulation. A water cooler is independently arranged on a second-stage compressor high-temperature gas exhaust pipeline, a third-stage compressor high-temperature gas exhaust pipeline and a fourth-level compressor high-temperature gas exhaust pipeline of the cascade refrigerating circulation, cheap cooling water which can be easily obtainedand is out of a system is introduced, and therefore, a refrigeration quantity and refrigeration efficiency can be effectively improved. Meanwhile, a precooling heat regenerator and an undercooling heat regenerator are configured in a second-stage high-temperature pipeline, a third-stage high-temperature pipeline and a fourth-stage high-temperature pipeline of the cascade refrigerating circulation, so that refrigeration efficiency can be improved, and the safe operation of a compressor can be guaranteed.

Description

technical field [0001] The invention relates to the field of cascade refrigeration, in particular to a four-stage cascade refrigeration device with multi-stage water coolers. Background technique [0002] At present, the cascade refrigeration system (including classic cascade and self-cascade refrigeration systems, etc.) is an important way to obtain low temperatures from -100°C to -150°C. and other fields have a wide range of applications. However, the cascade refrigeration devices currently used in the industry still have some areas to be improved: first, the cooling efficiency is low, and a large amount of electric energy can only be used to obtain a very limited low-temperature cooling capacity; second, the complexity of the cascade refrigeration system leads to easy working conditions. Fluctuations and offsets cause compressor suction overheating, lubrication deterioration and even burnout. Contents of the invention [0003] The purpose of the present invention is t...

AI Technical Summary

Problems solved by technology

However, the cascade refrigeration devices currently used in the industry still have some areas to be improved: first, the cooling efficiency is low, and a large amount of electric energy can only be used to obtain a very limited low-temperature cooling capacity; second, the complexity of the cascade refrigeration system leads to easy working conditions. Fluctuation and offset, causing compressor suction overheating, lubrication deterioration or even burning

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