A kind of double evaporating temperature injection refrigerator and method based on mixed working medium

Abstract

The invention discloses a dual-evaporation temperature injection refrigerator and method based on mixed working fluid. The refrigerator includes a first throttle valve, a second throttle valve, a high-temperature evaporator, a low-temperature evaporator, an ejector, and an air-cooled condenser , gas-liquid separator, water-cooled condenser, generator and circulation pump; generator, ejector, air-cooled condenser, gas-liquid separator and circulation pump constitute a power cycle; ejector, air-cooled condenser, gas-liquid separation Ejector, first throttle valve and high-temperature evaporator form the first refrigeration cycle to achieve higher refrigeration temperature; ejector, air-cooled condenser, gas-liquid separator, water-cooled condenser, second throttle valve and low-temperature evaporator The device constitutes a second refrigeration cycle to achieve a lower refrigeration temperature. Using non-azeotropic mixed working fluid, while reducing the injection compression ratio of the ejector and increasing its injection coefficient, it also realizes a low and a high two evaporative refrigeration temperatures, and improves the overall refrigeration coefficient of the device .

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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