Liquid distributor and falling-film-type heat exchanger

Abstract

The invention provides a liquid distributor and a falling-film-type heat exchanger. The liquid distributor comprises two or more liquid distribution structures and a liquid inlet pipe; the two or moreliquid distribution structures mutually communicate; the liquid inlet pipe is arranged on one of the two or more liquid distribution structures, and a liquid refrigerant flows in through the liquid inlet pipe and then is shunted into other liquid distribution structures in the two or more liquid distribution structures; and other liquid distribution structures in the two or more liquid distribution structures are provided with liquid distribution holes, and the liquid distribution holes are configured to be able to distribute liquid to heat exchange tubes. According to the liquid distributor,the multi-cavity design is adopted, a high-flow-speed refrigerant only impacts the liquid level in the first liquid distribution structure, the liquid levels in the other liquid distribution structures are stable, the liquid distributor can uniformly distribute the liquid, the liquid is uniformly distributed on the surfaces of the heat exchange tubes, the utilization rate of the heat exchange tubes is high, and the heat exchange effect is good; and distribution pipes arranged at intervals in a multi-connection mode are adopted for liquid distribution, the circulation sectional area of a vaporrefrigerant is increased, the flow speed of the vapor refrigerant is reduced, and the vapor-liquid entrainment phenomenon is relieved.

Description

Technical field[0001]The present disclosure belongs to the field of heat exchange technology, and specifically relates to a liquid distributor and a falling film heat exchanger.Background technique[0002]In the field of commercial air-conditioning heat exchange technology, falling film heat exchangers are widely used due to their high heat exchange efficiency and low refrigerant charge. However, the integral box-type liquid distributor for conventional falling film heat exchangers has the following technical problems:[0003]The high-speed flowing liquid refrigerant enters the liquid distributor from the liquid inlet and impacts the liquid surface of the liquid distributor. Due to the large liquid surface area, the liquid level in the liquid distributor continuously fluctuates and the liquid level in the liquid distributor is uneven. There is even no refrigerant in some areas. When the inlet refrigerant flow is small, due to the large volume of the box-type dispenser, there will be no ...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved in this disclosure is that the liquid refrigerant impacts the liquid surface of the liquid distributor, causing the liquid level in the liquid distributor to fluctuate continuously, and the liquid distribution of the liquid distributor is insufficient, thereby providing a liquid distributor and a falling film replacement heater

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