An Inner Cascade Refrigerator System Using a Supplementary Air Compressor and Its Control Method

Abstract

The invention relates to an internal overlapping refrigerator system with an air supplementing compressor and a control method. By means of the system, a binary non-azeotropic mixing working medium isadopted, a gas-liquid separator is used for achieving separation of high and low boiling point working media, it is guaranteed that more low boiling point working media enter a refrigeration evaporator, the air suction pressure of the compressor is improved, and the power dissipation of the compressor is reduced; the air supplementing compressor is used in the refrigerator system, the exhaust gastemperature of the compressor can be effectively reduced, the efficiency and reliability of the compressor are improved, in addition, by using the air supplementing compressor, the irreversible heattransfer loss of the refrigerator evaporator can be greatly reduced, and the system energy consumption is further reduced; a traditional refrigerator system has the shortcomings that the compressor pressure is large, the exhaust gas temperature is high, and the energy efficiency is low, the internal overlapping refrigerator system uses the air supplementing compressor and the internal overlappingtechnology, the problems can be effectively solved; and the invention further provides a feasible and effective control method, and therefore the system is guaranteed to run efficiently and reliably all the like.

Description

technical field [0001] The invention relates to the technical field of refrigerator refrigeration equipment, in particular to an internal cascade refrigerator system and a control method using an air supply compressor. Background technique [0002] As a widely used refrigeration equipment, the optimization of its structure and performance has always been a research hotspot. However, in practical applications, there is still a relatively large thermodynamic loss in the existing refrigerator system, resulting in relatively large energy consumption of the refrigerator. In addition, in the existing refrigerator system, there are still disadvantages such as high exhaust temperature, low evaporation pressure, and small cooling capacity of the system volume. Studies have shown that the use of supplementary air compressor technology can reduce the discharge temperature of the compressor and improve the energy efficiency of the system, while the application of cascade technology can...

AI Technical Summary

Problems solved by technology

However, in practical applications, there is still a large thermodynamic loss in the existing refrigerator system, resulting in a large energy consumption of the refrigerator

In addition, in the existing refrigerator system, there are still disadvantages such as high exhaust temperature, low evaporation pressure, and small cooling capacity of the system volume.

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