Two-phase flow injector replacing refrigerator throttling element

Abstract

Injector in two-phase flow includes step motor, adjustable valve body, nozzle, case of injector, adaptor of injection liquid, air intake cavity, mixing chamber and pressure expansion chamber etc. In nozzle, refrigerant agent is quickened up continuously so as to reduce pressure in the air intake cavity. Thus, gaseous refrigerant agent from evaporator is injected to the air intake cavity. Then, gaseous refrigerant agent and liquid in main flow from condenser are mixed in the mixing chamber. Pressure expansion is carried out in pressure expansion chamber, and mixed flow outflows from case of injector. Mixing liquid in main flow with injection liquid is carried out under approximate equi-pressure. The pressure expansion chamber is designed based on theory of equal flow of momentum rate so as to raise efficiency of injector. Features are: few moving parts, raised efficiency of system about 5%-20%.

Description

technical field [0001] The invention relates to an ejector, especially a two-phase flow ejector whose mainstream fluid at the inlet of the ejector is liquid refrigerant and whose cooling capacity can be adjusted, and which is used to replace the throttling element of a refrigerator, and belongs to the technical field of refrigeration . Background technique [0002] Most of the existing refrigerators are composed of four parts: compressor, condenser, expansion valve, and evaporator. After being compressed by the compressor, the gaseous refrigerant enters the condenser to condense into a high-pressure and high-temperature liquid, and then expands through the expansion valve. It becomes a low-temperature and low-pressure two-phase fluid, then enters the evaporator to evaporate, absorbs the heat of the fluid outside the evaporator to vaporize, and then enters the compressor to complete a cycle. During the refrigerant cycle, the refrigerant is in a liquid state at the outlet of t...

AI Technical Summary

Problems solved by technology

Recovering the throttling loss of the refrigeration system by replacing the throttling element with an ejector is an effective way to improve the efficiency of the refrigeration system. In the existing technology, as early as 1966, C.A.Kemper of the United States applied for the patent number: US 3277660 for jet refrigeration However, due to the lack of theoretical research on the two-phase flow ejector at that time, the actual device did not achieve the desired effect

With the development of technology, the theory of two-phase flow ejector is becoming more and more perfect, and the ejector refrigeration cycle is mentioned again in the field of refrigeration device manufacturing; the publication number is CN1460823A, and the invention name is the invention patent of ejector, which is a The ejector in the refrigeration system of the refrigeration cycle, the invention is basically the same structure as the ejector of the conventional heat-driven steam injection refrigeration system, but the ejector is not suitable for use as a refrigerant throttling element

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