Falling film type evaporation pipe, heat exchanger and air conditioning unit

Abstract

The invention provides a falling film type evaporation pipe, a heat exchanger and an air conditioning unit. The falling film type evaporation pipe comprises a pipe body and a plurality of heat exchange structures arranged on the outer surface of the pipe body; each heat exchange structure comprises a curved-surface-shaped heat exchange body, wherein the curved-surface-shaped heat exchange body is arranged on the outer surface of the pipe body in the manner that an opening of the curved-surface-shaped heat exchange body faces downwards; a gasification space is formed between each curved-surface-shaped heat exchange body and the pipe body; and each curved-surface-shaped heat exchange body is provided with a circulation groove communicating with the corresponding gasification space. By means of the technical scheme, the gasification spaces are formed between the curved-surface-shaped heat exchange bodies and the pipe body and can increase the superheat degree of liquid refrigerants, and therefore evaporation of the liquid refrigerants is facilitated. In the use process, the liquid refrigerants enter the gasification spaces from the circulation grooves and then are evaporated into gaseous refrigerants to be scattered and overflow. By means of the technical scheme, the evaporation efficiency of the liquid refrigerants on the outer surface of the falling film type evaporation pipe is improved, and the heat exchange efficiency of the falling film type evaporation pipe is improved.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to a falling-film evaporation tube, a heat exchanger and an air-conditioning unit. Background technique [0002] The horizontal tube falling film evaporator has the characteristics of high energy efficiency and low refrigerant charge. It has been widely used in chemical industry, seawater desalination, petroleum smelting and absorption chillers and other fields. It has a liquid distributor at the refrigerant inlet. The refrigerant gas-liquid mixture is evenly distributed to the surface of the heat exchange tubes through the liquid distributor, forming a flowing film on the surface of the heat exchange tubes, and exchanging heat with the chilled water in the tubes. The flow state of the refrigerant between the tube bundles affects the horizontal tubes. Heat transfer performance of falling film evaporator. [0003] At present, the common method to reduce the heat...

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Problems solved by technology

[0004] The embodiment of the present invention provides a falling film evaporator tube, a heat exchanger and an air conditioning unit to solve the technical problem of poor heat transfer performance outside the heat exchange tube in the falling film evaporator tube in the prior art

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