Falling-film type evaporator and air conditioner

Abstract

The invention discloses a falling-film type evaporator and an air conditioner. The falling-film type evaporator comprises a chamber with a gas outlet, a heat exchanger tube group arranged in the chamber and a liquid blocking structure, wherein the liquid blocking structure is arranged between the heat exchange tube group and the inner wall of the chamber, and is provided with a bent gas outlet channel; and a refrigerant which exchanges heat with the heat exchange tube group reaches the gas outlet through a gas outlet channel. The falling-film type evaporator is equipped with the liquid blocking structure, so that the refrigerant which exchanges heat with the heat exchange tube group needs to pass through the bent gas outlet channel to reach the gas outlet, and the bent gas outlet channel forms turbulent flow on the refrigerant; and under dual action of turbulent flow and gravity, the liquid blocking structure sufficiently catches the liquid-state refrigerant, so that gas-liquid separating ability of the falling-film type evaporator is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a falling film evaporator and an air conditioner. Background technique [0002] The falling film evaporator has the advantages of good heat transfer performance and less amount of injected refrigerant, and has been widely used in air-conditioning chillers. When the falling film evaporator is in the working state, the surface of the heat exchange tube is in a boiling evaporation state, and the refrigerant gas produced in the boiling evaporation state basically has no superheat or very low superheat. When the degree of superheat is insufficient, the air-conditioning unit system is prone to entrain too much liquid-phase refrigerant into the compressor when the air-conditioning unit system is running. Contents of the invention [0003] The object of the present invention is to provide a falling film evaporator and an air conditioner to improve the gas-liquid separation ca...

AI Technical Summary

Problems solved by technology

When the superheat is insufficient, the air-conditioning unit system is prone to entrain too much liquid-phase refrigerant into the compressor when the gas-phase refrigerant is running, that is, the phenomenon of suction and liquid, which will cause certain impact or damage to the compressor, thereby reducing the operating reliability of the unit.

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