A kind of heat exchanger and its fin

Abstract

The invention discloses a fin for a heat exchanger. The fin comprises a plurality of fin units with a fin body, wherein each fin unit comprises a plurality of protruded parts protruding from the upper surface and / or the lower surface of the fin body, and the protruded parts and the fin body form a continuous surface in the airflow direction; a first wind guide part is arranged at each protruded part and used for guiding air to flow through the tops of the protruded parts. The first wind guide part is arranged at the top of each protruded part, and the air flows through the convex top of each protruded part along each first wind guide part. Compared with the direct contact of the top of each protruded part and air in the prior art, when the air flows through the top of each protruded part of the fin, each first wind guide part can play a good guide role for the air flow, and the damage of the convex top of each protruded part for the boundary layer of air flow is reduced, so that the resistance of the fin to the air flow is reduced, and the heat exchange efficiency of the heat exchanger is improved to a large extent. In addition, the invention further discloses the heat exchanger with the fin.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a heat exchanger and its fins. Background technique [0002] A heat exchanger is a device that realizes heat transfer between cold and hot fluids, and is widely used in HVAC and other fields. [0003] A typical heat exchanger includes two headers that are parallel to each other up and down, and there are a plurality of heat exchange tubes arranged in parallel between the two headers, and corrugated fins are arranged between adjacent heat exchange tubes. piece. The two headers are provided with a plurality of heat exchange interfaces on the corresponding tube walls along the length direction, and the two ends of the heat exchange tubes are respectively inserted into the heat exchange interfaces on the headers to realize the heat exchange of the two headers. connected. Generally, when a heat exchanger is used, the fins generally need to have two functions: first, the surfa...

AI Technical Summary

Problems solved by technology

The window fin 2' of the louver forms a certain angle with the fin body 1'. When the air flows through the fin, the edge of the window fin 2' directly interacts with the air, directly destroying its flow boundary layer, thus increasing the fin pair. The air flow resistance seriously affects the heat exchange efficiency of the heat exchanger, resulting in a relatively low heat exchange efficiency of the heat exchanger

[0007] In addition, there are small gaps in the contact angle between the window fin 2' and the surface of the fin body 1', and the opening structure is relatively narrow and long, which is easy to accumulate dust and water

Images