Microchannel heat exchanger and fin thereof

Abstract

The invention discloses a fin which extends lengthwise in a corrugate manner and comprises main body sections and transition sections, wherein the main body sections and the transition sections are connected together, the transition sections constitute peaks and troughs of the fin, and the main body sections extend between the peaks and troughs in a curved manner. The main body sections of the fin of the invention is curve-shaped so that when a microchannel heat exchanger is bended, the bended inside parts of the main body sections are easy to compress, the transformation is regular and the bended inside parts are not easy to fall down, thus the air passage can not be blocked; the bended outside parts of the main body sections are easy to draw, are not easy to break and can not affect the appearance of the microchannel heat exchanger; and the heat exchange performance is good.

Description

technical field [0001] The invention relates to a heat exchanger and its fins, in particular to a microchannel heat exchanger and its fins. Background technique [0002] Such as Figure 10 As shown, a traditional microchannel heat exchanger usually includes a first header 1', a second header 2' that is substantially parallel to the first header 1' and spaced apart from a predetermined distance, and is arranged at the first header along the longitudinal direction A. The flat tube 3' between the header 1' and the second header 2', and the fins 4' arranged between the adjacent flat tubes 3', wherein the first header 1' and the second header One end of the flow tube 2' is respectively connected with connection tubes 5' and 6'. Such as Figure 9 As shown, the fin 4' is generally corrugated in the longitudinal direction A, and includes a straight main body section 41' and transition sections 42' connected at both ends of the main section 41', and the transition sections 42' form...

AI Technical Summary

Problems solved by technology

However, since the main body section 41' between the transition section 42' of the fin 4' of the traditional microchannel heat exchanger is straight and not easily deformed, it is difficult to bend due to the support of the main body section 41', and the main body section The outer part of the 41' bend is greatly stretched and deformed, even causing tearing, which affects the appearance and destroys the heat transfer performance of the air side

In addition, the bent inner part of the main body section 41' is compressed, causing problems such as irregular deformation and lodging, which hinder air circulation

If the micro-channel heat exchanger is used as an evaporator, it is easy to accumulate condensed water and cannot be discharged, resulting in increased wind resistance and reduced heat transfer performance

If the micro-channel heat exchanger is used as the heat exchanger of the outdoor unit of the heat pump, it is easy to frost and block the air flow channel. After defrosting, water is easy to accumulate and difficult to discharge, resulting in deterioration of heat transfer performance.

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