Microchannel heat exchanger and flat tube thereof

Abstract

The invention discloses a microchannel heat exchanger and a flat tube thereof. The flat tube comprises a flat tube body, the flat tube body is provided with a first torsion section, a straight sectionand a second torsion section which are sequentially connected along the short axis of the flat tube body, the first torsion section and the second torsion section are both twisted around the short axis of the flat tube body, and the torsion angles of the first torsion section and the second torsion section are different. Condensed water on the flat tube can be discharged in time, and normal heatexchange of the flat tube cannot be affected. In this way, the heat exchange efficiency of the microchannel heat exchanger adopting the flat tubes is ensured.

Description

technical field [0001] The invention relates to the technical field of heat exchange equipment, in particular to a microchannel heat exchanger and a flat tube thereof. Background technique [0002] Compared with traditional air-cooled heat exchangers, microchannel heat exchangers have significant advantages such as compact structure, high heat transfer efficiency, less refrigerant charge, and low material cost, and become an important development direction of the heat exchanger industry in the future. [0003] Under evaporative conditions, when the evaporating temperature is lower than the dew point temperature of the humid air, the water vapor in the humid air will condense on the surface of the heat exchanger to form condensation. For the traditional microchannel heat exchanger with flat tubes placed horizontally, due to the flat structural characteristics of the flat tubes, condensed water accumulates on the surface of the flat tubes during the use of the heat exchanger, ...

AI Technical Summary

Problems solved by technology

For the traditional microchannel heat exchanger with flat tubes placed horizontally, due to the flat structural characteristics of the flat tubes, condensed water accumulates on the surface of the flat tubes during the use of the heat exchanger, resulting in poor drainage efficiency.

Condensed water will increase the flow resistance on the air side, increase the power consumption of the fan, and cause the ratio of latent heat to sensible heat to change during the air conditioning process. In frosting conditions, it will increase the frequency of defrosting, which will greatly limit the microchannel. Promotion and Application of Heat Exchanger

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