A gas-liquid two-phase injector based on synergistic control of combined surfaces of affinity and repellency

Abstract

The invention provides a gas-liquid two-phase injector based on the synergistic control of combined surface of affinity and hydrophobicity, including: an active nozzle for ejecting working fluid; an ejection nozzle for ejecting ejection fluid; a mixing chamber and active The nozzle is connected to the injection nozzle, which is used to mix the working fluid and the injection fluid to form a mixed fluid; the outlet diffusion chamber is connected to the mixing chamber, and is used to pressurize and discharge the mixed fluid; and the adjusting needle is arranged in the active nozzle , used to adjust the throat area of ​​the active nozzle, wherein the inner surfaces of the active nozzle, the mixing chamber and the outlet diffusion chamber are micro-nano composite structures of oleophobic and liquid-repellent working fluid, which are used to promote the lubricating oil and liquid working fluid to the injector The center of the flow field bounces independently, and the surface of the adjusting needle is a micro-nano composite structure of lipophilic and liquid-friendly working fluid, which is used to make the lubricating oil and liquid working medium flow along the micro-nano channel in the axial direction of the adjusting needle to the end of the adjusting needle , and enter the mixing chamber with the high-speed fluid at the end of the adjusting needle.

Description

technical field [0001] The invention belongs to the technical field of ejectors and ejector circulation systems, and in particular relates to a gas-liquid two-phase ejector based on synergistic control of combined surfaces of affinity and repellency. Background technique [0002] An ejector is a device that uses high-pressure fluid to pump low-pressure fluid, and is widely used in chemical engineering, nuclear reactors, power plants, petroleum and refrigeration industries. In the vapor compression heat pump refrigeration cycle system, replacing the traditional throttling valve with an ejector can significantly improve the system performance efficiency. The performance efficiency of the gas-liquid two-phase ejector can be adjusted and optimized by adjusting the needle and the wall heating of the ejector. The dryness of the ejector outlet affects the cooling and heating capacity and system efficiency of the ejector heat pump cycle system, and the compressor lubricating oil in ...

AI Technical Summary

Problems solved by technology

Under the current refrigeration and air-conditioning conditions, the maximum temperature in the system is much lower than the boiling point of the lubricating oil, and the lubricating oil always exists in liquid form. In the case of high dryness, the lubricating oil will accumulate on the inner surface of the injector. The detrimental effect of heat transfer increases

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