Double-evaporation-temperature jet refrigerating machine and method based on mixed working medium

Abstract

The invention discloses a double-evaporation-temperature injection refrigerating machine and method based on a mixed working medium. The refrigerating machine comprises a first throttling valve, a second throttling valve, a high-temperature evaporator, a low-temperature evaporator, an injector, an air-cooled condenser, a gas-liquid separator, a water-cooled condenser, a generator and a circulating pump; the generator, the ejector, the air-cooled condenser, the gas-liquid separator and the circulating pump form a power cycle; the ejector, the air-cooled condenser, the gas-liquid separator, the first throttling valve and the high-temperature evaporator form a first refrigeration cycle, and high refrigeration temperature is achieved; and the ejector, the air-cooled condenser, the gas-liquid separator, the water-cooled condenser, the second throttling valve and the low-temperature evaporator form a second refrigeration cycle, and low refrigeration temperature is achieved. A non-azeotropic mixed working medium is adopted, the ejection compression ratio of the ejector is reduced, the ejection coefficient of the ejector is improved, meanwhile, a low evaporation refrigeration temperature and a high evaporation refrigeration temperature are achieved, and the overall refrigeration coefficient of the device is improved.

Description

technical field [0001] The invention relates to a spray refrigerator and a method, in particular to a mixed working fluid-based double evaporation temperature spray refrigerator and a method, belonging to the technical field of air conditioning and refrigeration. Background technique [0002] The ejector refrigeration system is simple, has few moving parts, compact structure, and takes up little space. It also has the advantages of using renewable energy such as solar energy, geothermal energy, and low-grade energy such as industrial waste heat to achieve refrigeration. It can improve energy utilization and facilitate maintenance and management. , is a promising refrigeration method. Studies have shown that when the compression ratio of the ejector's back pressure to the injection pressure is too high, the injection coefficient will drop sharply, which means that it is difficult for traditional ejector refrigeration to achieve a lower refrigeration temperature. [0003] In ...

AI Technical Summary

Problems solved by technology

Studies have shown that when the compression ratio of the ejector's back pressure to the injection pressure is too high, the injection coefficient will drop sharply, which means that it is difficult for traditional injection refrigeration to achieve a lower cooling temperature

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