Toothed groove type tube-sheet evaporative cooling heat exchanger, air conditioning unit and air conditioner

Abstract

The invention relates to a toothed groove type tube-sheet evaporative cooling heat exchanger and an air conditioning unit. The heat exchanger comprises a plurality of heat exchange pipes connected insequence, heat exchange connecting pipes used for communicating of the adjacent heat exchange pipes, and heat exchange assemblies connected to the outer circumferential sides of the heat exchange pipes, wherein the heat exchange assemblies are provided with heat exchange channels which are connected with the heat exchange pipes in a sleeve manner, a plurality of toothed grooves are uniformly formed in the side of connection between the heat exchange channels and the heat exchange pipes, and toothed parts for contacting the heat exchange pipes are formed between the adjacent toothed grooves. According to the heat exchanger, when the heat exchange pipes are expanded, the toothed grooves form receded structures, expansion force parts of the heat exchange pipes can be converted into expansiondeformation of the heat exchange pipe groove type parts, the contact area with the heat exchange pipes during expansion is reduced through the toothed groove type structures, so that the acting forcebetween an integral heat exchange plate and the heat change pipes during expansion is lowered, the assembly difficulty of the tube-sheet type heat exchanger is reduced, meanwhile, due to the fact thatthe toothed groove type structures are arranged on the heat exchange plate, the heat exchange tube structures protruding through the expansion force can be partially receded, the situation of expansion cracking can be avoided, and the quality of products is guaranteed.

Description

technical field [0001] The invention relates to the technical field of evaporative cooling heat exchangers, in particular to an alveolar plate tube evaporative cooling heat exchanger and an air conditioning unit. Background technique [0002] Evaporative cooling heat exchangers are mainly used in evaporative cooling air conditioning units. The working principle is: the cooling water is pumped to the spray system above the heat exchanger, and sprayed evenly on the surface of the heat exchanger through the water distributor to form a thin water film. The temperature of the high-temperature refrigerant gas in the heat exchanger rises after heat exchange, thereby realizing the condensation of the refrigerant medium, and the spray water falls back to the lower sump after heat exchange, and then is sent to the spray system by the circulating water pump for recycling . Heat exchangers are mainly divided into tube structure, plate structure, and plate and tube structure. The plate...

AI Technical Summary

Problems solved by technology

At present, the plate-tube evaporative cooling heat exchanger is generally inserted into the metal heat exchange plate and then expanded after rolling welding, or the heat exchange tube is inserted into the heterogeneous heat exchange profile with the arc-shaped heat exchange tube structure reserved. Then expand, because the two types of heat exchange tubes and the heat exchange plate structure are in close contact with the smooth surface, so the arc-shaped heat exchange tube will be wrapped by the arc-shaped heat exchange plate during expansion. All-round extrusion effect, the metal flat plate of the plate-tube heat exchanger is easy to expand the weld seam due to the expansion of the heat exchange tube, which affects the heat exchange capacity. The all-round reaction force of the structure makes it difficult to expand the heat exchange tube and the heat exchange plate, and the assembly is difficult. At the same time, there will be cases of expansion and cracking due to the lack of flexible avoidance structure of the heat exchange plate

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