Ejector enhanced quasi-two-stage compression type circulating system

Abstract

The invention relates to an ejector enhanced quasi-two-stage compression type circulating system, which is an auto-cascade compression refrigeration circulation system and comprises a compressor, wherein the compressor is connected with a condenser; the condenser is connected with a first gas-liquid separator; one liquid outlet of the first gas-liquid separator is connected with a first ejector; the first ejector is connected with an air supply port of the compressor through a superheated side of a first heat regenerator; the other liquid outlet of the first gas-liquid separator is connected with an evaporation side inlet of an evaporative condenser through a supercooled side of the first heat regenerator and a depressurization and cooling element in sequence; an evaporation side outlet is connected with a secondary flow inlet of the first ejector; a gas outlet of the first gas-liquid separator is connected with the evaporator through a second heat regenerator, a condensation side of the evaporative condenser, a second gas-liquid separator and a third heat regenerator; and the evaporator is connected with an air suction port of the compressor through the third heat regenerator, a second ejector and a second heat regenerator. The system of the invention is high in variable working condition adapting capacity and small in throttling loss.

Description

technical field [0001] The invention relates to the technical field of vapor compression refrigeration and heat pump, in particular to a quasi-two-stage compression cycle system with ejector efficiency boost. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Current compression cycle systems include compression refrigeration cycle systems and compression heat pump cycle systems. [0004] For the compression refrigeration cycle system, with the development of industry and technological progress, many fields such as biomedicine, food industry, and cold chain logistics have put forward new requirements for low-temperature refrigeration technology, especially for the temperature range below -40 °C. strong. At present, the ways to realize the above-mentioned low-temperature area refrigeration mainly include: multi-stage compression refrigeration of sing...

AI Technical Summary

Problems solved by technology

However, as the evaporation temperature decreases, the irreversible loss of throttling increases, and too much flash gas enters the evaporator, resulting in a decrease in the effective use area of ​​the heat exchanger and an increase in the size of the heat exchanger

[0009] Patent CN110274403A discloses a quasi-two-stage compression cycle system with injector synergy, which improves the suction inlet pressure of the compressor and reduces the power consumption of the compressor. It is difficult to find a suitable air supply point when operating under variable operating conditions only by adjusting the throttle valve during operation

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