Falling film heat exchange tube, falling film heat exchanger and air conditioner

Abstract

The invention provides a falling film heat exchange tube, a falling film heat exchanger and an air conditioner. The falling film heat exchange tube comprises a tube base body (1) and vertical teeth (2) arranged on the outer wall of the tube base body (1), and the vertical teeth (2) extend out from the outer wall of the tube base body (1) in the direction away from the outer wall; and a plurality of vertical teeth (2) are arranged on the tube base body (1), side teeth (5) are further arranged on the side wall between the tops and the bottoms of the vertical teeth (2) in a protruding manner in the horizontal direction, the vertical teeth are arranged in the axial direction and / or the circumferential direction of the tube base body (1), semi-closed evaporation cavities (9) are formed between the adjacent side teeth (5) and the vertical teeth (2), and ribs (6) are further arranged on the upper end faces of the side teeth (5). According to the falling film heat exchange tube, the falling film heat exchanger and the air conditioner, the evaporation heat exchange efficiency of the heat exchange tube and the condensation heat exchange efficiency of the heat exchange tube can be improved under the heating working condition and the refrigeration working condition.

Description

technical field [0001] The invention belongs to the technical field of heat exchange, and in particular relates to an enhanced heat exchange tube, a falling film heat exchanger and an air conditioner in a horizontal shell-and-tube falling film heat pump unit. Background technique [0002] Large-scale water-cooled heat pump units are gradually being popularized and used because they can both cool and heat, and can provide users with a more comfortable experience. This kind of heat pump unit requires that the evaporator in the air conditioning unit can also be used as a condenser after being controlled and switched. In the cooling condition, the inner and outer tubes of the evaporator are low-temperature and low-pressure Freon refrigerants, and the refrigerant outside the tubes is evaporated by the hot water in the tubes; in the heating conditions, the same heat exchanger acts as a condenser. It is a high-temperature and high-pressure Freon refrigerant vapor, which is condens...

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the low heat exchange efficiency of falling film heat exchange tubes in the prior art, which cannot meet the needs of high-efficiency falling film evaporation and meet the needs of external condensation. Thereby providing a falling film heat exchange tube, falling film heat exchanger and air conditioner

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