Heat exchanger

Abstract

The invention provides a heat exchanger. The heat exchanger is provided with a plurality of fins which are mutually separated with prescribed intervals and configured in a stacking mode and heat exchanging tubes which penetrate through the fins along the stacking direction of the plurality of fins, wherein the fins are provided with a plurality of slit parts punched along the stacking direction, and the plurality of silt parts are parallelly arranged along the flow direction of gas, guiding parts for guiding the gas to flow are arranged on inlet ends and / or outlet ends of the plurality of slit parts of the fins corresponding to the gas. The guiding parts of the gas located in the inlet ends of the plurality of silt parts play a gas flow guiding role and guide the gas to attach to the walls of the heat exchanging tubes and the surfaces of the fins to flow, heat exchanging effect is improved. The guiding parts of the gas located in the inlet ends of the plurality of silt parts can conduct rectification on turbulent flow flowing through the plurality of silt parts, and play a role of stablizing wake flow, and therefore wake flow vortex is reduced.

Description

technical field [0001] The invention relates to a heat exchanger. Background technique [0002] The performance of the air conditioner is closely related to the performance of the heat exchanger, and the performance of the heat exchanger is closely related to the fins. The fins mainly include flat fins, corrugated fins, and slotted fins, among which slotted fins are the most widely used. On the premise of reasonably increasing the fin spacing and optimizing the fin structure, the heat transfer performance of the slotted fin is better than that of the corrugated fin. [0003] At present, the slotted fins have single-bridge, double-bridge, X-type punching forms, etc. Different punching forms determine the heat transfer performance of the fins. X-type slit fins are suitable for small fin pitches. Large fin pitches lead to a decrease in heat transfer capacity. However, heat exchangers with small fin pitches require more fins per unit length, resulting in an increase in overall ...

AI Technical Summary

Problems solved by technology

X-shaped slit fins are suitable for small fin pitches. Large fin pitches lead to a decrease in heat transfer capacity. However, heat exchangers with small fin pitches require more fins per unit length, resulting in an increase in overall machine costs.

At the same time, under the small fin spacing, the X-shaped slit fins still have the problem of increased resistance and difficult air flow

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