Two-stage compression adjustable dryness refrigeration system with ejector

Abstract

The invention relates to a two-stage compression adjustable dryness refrigeration system with an ejector. The two-stage compression adjustable dryness refrigeration system comprises a main refrigeration cycle and an injection module, the main refrigeration cycle comprises a primary compressor, a secondary compressor, a dryness adjustable condenser device, a throttling valve and a dryness adjustable evaporator device which communicate with each other in sequence; and the injection module comprises an electronic valve, a gas-liquid separator I, the ejector and a gas-liquid separator II. By meansof the improvement of the above structure, the shortcomings that a two-stage compression intercooling refrigeration system in the prior art has liquid film accumulation in the condensation process, is low in condensation heat transfer efficiency, is low in evaporation efficiency in the low dryness region in the evaporation process and is not high in intermediate cooling efficiency, and consequently the refrigerating cycle is low in overall energy efficiency, consumes materials and is large in occupation space of heat exchange equipment are overcome. The two-stage compression adjustable dryness refrigeration system has the characteristics of being simple in structure, higher in heat exchange efficiency, easy and convenient to maintain, capable of saving energy and materials, small in occupied space and the like, and practicality is high.

Description

technical field [0001] The invention relates to the field of refrigeration systems, in particular to a two-stage compression adjustable dryness refrigeration system with an ejector. Background technique [0002] The traditional two-stage compression refrigeration system is mainly composed of two compressors, a condenser, an evaporator and an intercooler and other components. In the traditional two-stage compression refrigeration system, if you want to increase the system efficiency or cooling capacity of the refrigeration cycle, the usual method is to increase the heat exchange area of ​​the evaporator and condenser, thereby improving the energy exchange efficiency, but it will significantly increase the material consumption and not Conducive to miniaturization of equipment. In addition, during the condensation process, steam often condenses into condensate on the wall of the condenser and spreads into a liquid film, but the thermal conductivity of the liquid film is poor, ...

AI Technical Summary

Problems solved by technology

In the traditional two-stage compression refrigeration system, if you want to increase the system efficiency or cooling capacity of the refrigeration cycle, the usual method is to increase the heat exchange area of ​​the evaporator and condenser, thereby improving the energy exchange efficiency, but it will significantly increase the material consumption and not Conducive to miniaturization of equipment

In addition, during the condensation process, steam often condenses into condensate on the wall of the condenser and spreads into a liquid film, but the thermal conductivity of the liquid film is poor, which seriously affects the transfer of heat, making the condensation efficiency of the condenser relatively low; During the evaporation process, due to the slow flow rate and low heat transfer coefficient of the heat exchange tube in the low dryness evaporation process, the heat transfer efficiency of the traditional evaporator is not high in the low dryness area. However, when the fluid is in the high dryness core In the state boiling zone, the evaporation heat transfer efficiency is significantly improved

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