Auto-cascade steam compression type refrigeration cycle system

Abstract

The invention discloses an auto-cascade steam compression type refrigeration cycle system which comprises a first gas and liquid separator, an evaporation condenser, an evaporator and an expansion valve. A first ejector is connected between a saturated refrigerant liquid outlet of the first gas and liquid separator and an evaporation side inlet of the steam condenser, a second gas and liquid separator is connected between a condensation side outlet of the evaporation condenser and an inlet of the evaporator, and a second ejector is connected between an inlet of the second gas and liquid separator and a condensation side outlet of the evaporation condenser. The system has the advantages that compared with a conventional auto-cascade refrigeration cycle system, the two ejectors are adopted in the system to take the place of an expansion valve or a capillary tube, so that expansion work in the throttling process is fully recycled, gas suction pressure of a compressor is improved, power consumption of the compressor in a cycle is reduced, gas conveying amount of the compressor is also improved, and performance of the cycle system is effectively improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a self-cascading vapor compression refrigeration cycle system, in particular to a double-jet synergistic self-cascade vapor compression refrigeration cycle system. Background technique [0002] The self-cascading refrigeration system is a refrigeration system that 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. The self-cascading refrigeration system has a large working temperature range, so it has been widely used in general refrigeration, low temperature electronics, low temperature medicine, freeze drying and other fields. In the conventional self-cascading refrigeration cycle system, throttle valves or capillary tubes are usually used as throttling components. Since the operating temperatur...

AI Technical Summary

Problems solved by technology

In the conventional self-cascading refrigeration cycle system, throttle valves or capillary tubes are usually used as throttling components. Since the operating temperature of the self-cascading refrigeration cycle system is relatively high, there will be a large throttling loss during the throttling process. , resulting in lower energy efficiency of the system

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