Ejector enhanced auto-cascade steam compressing type refrigeration cycle system

Abstract

An ejector enhanced auto-cascade steam compressing type refrigeration cycle system comprises a compressor, a condenser and a gas-liquid separator which are connected in sequence. An outlet of the gas-liquid separator is divided into two paths, one saturated refrigerant liquid outlet is connected with a work fluid inlet of an ejector, and the other saturated refrigerant gas outlet is connected with a condensation side inlet of an evaporation condenser. A condensation side outlet of the condenser is connected with an inlet of an expansion valve, an outlet of the expansion valve is connected with an inlet of the evaporator, an outlet of the evaporator is connected with a driving fluid inlet of the ejector, an outlet of the ejector is connected with an evaporation side inlet of the evaporation condenser, an evaporation side outlet of the evaporation condenser is connected with a gas suction opening of the compressor, and a cycle is completed. The ejector is used in the auto-cascade steam compressing type refrigeration cycle system for replacing an expansion valve or a capillary tube to recycle part of expansion power in the throttling process, the gas suction pressure of the compressor is improved, and therefore power consumption of the compressor in the cycle is reduced, the gas conveying amount of the compressor is improved, and the performance of the auto-cascade steam compressing type refrigeration cycle system is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a self-cascading vapor compression refrigeration cycle system with ejector synergies. Background technique [0002] Self-cascading refrigeration system is a refrigeration system that uses non-azeotropic mixed working fluid and can realize multi-stage automatic cascade through a single compressor to obtain a lower refrigeration temperature. Compared with the cascade refrigeration system, it has the advantages of simple structure and low cost. Since the self-cascading refrigeration system has a relatively large working temperature range, it has been widely used in general refrigeration, low-temperature electronics, low-temperature medicine, freeze-drying and other fields. In recent years, with the rapid growth of energy demand, the increasingly prominent environmental and climate issues and the development of low-carbon economy, higher requirements have been put ...

AI Technical Summary

Problems solved by technology

However, there is still a lack of methods for the application of ejectors on self-cascading refrigeration systems.

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