A distributor for falling film evaporator

Abstract

The invention relates to evaporator fittings in refrigeration equipment, in particular to a distributor used in falling film evaporators. A distributor used in a falling film evaporator, comprising a cover plate, a gas-liquid separation tray and a gravity drip tray, the bottom of the gravity drip tray is uniformly covered with water holes and provided with a plurality of partitions, the The top of the gravity drip tray is connected with the gas-liquid separation tray, the bottom plate of the gas-liquid separation tray is evenly distributed with pressure holes, the gas-liquid separation tray is fixedly connected with a cover plate, and the gas-liquid separation tray is connected with the The cover plate forms a closed gas-liquid separation chamber, and the cover plate is provided with a liquid inlet and a mist eliminator. The beneficial effect of the present invention is: to separate the gaseous refrigerant in the gas-liquid two-phase refrigerant, and to prevent the liquid droplets from being entrained by the gaseous refrigerant, so as to realize the uniform and effective discharge of the gas, and at the same time ensure the uniform dripping of the liquid and reduce evaporation Detrimental effects of airflow in the process.

Description

technical field [0001] The invention relates to evaporator fittings in refrigeration equipment, in particular to a distributor used in falling film evaporators. Background technique [0002] The working principle of the falling film evaporator is: the refrigerant liquid condensed from the condenser expands through the throttling device to form a gas-liquid two-phase refrigerant. Driven by pressure, the gas-liquid two-phase refrigeration The refrigerant enters the distributor at the top of the evaporator and is distributed through multiple stages. Finally, the refrigerant is left from the distribution hole at the bottom of the distributor and drops on the heat exchange tube of the evaporator. From top to bottom, it drips down to the heat exchange tube below, so that the refrigerant evaporates, and the heat is transferred from the medium in the heat exchange tube to the refrigerant, thereby achieving the cooling effect. In the above process, the most critical factor affecting...

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Problems solved by technology

[0004] 2. The bottom of the conventional drip pan is generally equipped with circular holes, square holes or diagonal holes. Because the refrigerant has a certain viscosity, the simple gravity cannot completely overcome the viscous force and drip down smoothly to the heat exchange. On the tube, the outer surface of the heat exchange tube cannot be completely infiltrated, which is not conducive to film boiling heat transfer

[0005] 3. Conventional falling film distributors are generally not equipped with the equalization plate. At the position near the suction port on the top of the falling film evaporator, the air flow is relatively concentrated and the flow rate is relatively fast.

In the process of the falling film distributing refrigerant, near the suction nozzle, because the gas flows upwards and the flow velocity is fast, the refrigerant liquid that drops down is subjected to a large upward force and is carried to the suction port, thereby Liquid back occurs, which seriously affects the heat transfer efficiency of the falling film evaporator and the stable operation of the chiller

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