Heat exchange fin and heat exchanger

Abstract

The invention provides a heat exchange fin and a heat exchanger, and relates to the technical field of heat exchange devices. The heat exchange fin has the advantage that the heat exchange property can be improved. The heat exchange fin comprises a substrate and a plurality of pipe holes, wherein the pipe holes are formed in the substrate, a sleeve ring is formed around each pipe hole, a heat exchange pipe of the heat exchanger is arranged in each sleeve ring and the corresponding pipe hole in a penetrating way, a first convex part is formed on the substrate, is in a circle shape, and is arranged around each sleeve ring, and the inner diameter of each first convex part is greater than the outer diameter of the corresponding sleeve ring. The heat exchange fin is used for the heat exchanger.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a heat exchange fin and a heat exchanger. Background technique [0002] A heat exchanger is a device used in heating and refrigeration cycles, which can make the medium in it reach the required temperature by exchanging heat. At present, heat exchangers are widely used in air conditioners, heat pumps, and refrigerators. Among them, tube-fin heat exchangers are usually used in heat exchange equipment such as evaporators, condensers, and intercoolers of air-conditioners or heat pumps. Type heat exchangers generally include multiple heat exchange fins and multiple heat exchange tubes. There are multiple tube holes on the heat exchange fins, and the heat exchange tubes are installed in the tube holes. It flows outside the tube, conducts heat conduction between the heat exchange medium and the air through the tube wall and heat exchange fins, and realizes heat exchange. The f...

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Problems solved by technology

[0003] The surface of heat exchanging fins in the prior art is usually relatively flat. When exchanging heat, along the direction of air flow, an air boundary layer will be formed on the surface of the heat exchanging fins, and as the air flows, the boundary layer will Gradually thickens, making it difficult for the surface of the heat transfer fin to fully contact with the flowing air, thus reducing the heat transfer performance

At present, in order to improve the heat transfer performance, the area of ​​the heat transfer fins is generally increased to increase the heat transfer area and improve the heat transfer performance, or by opening slits on the heat transfer fins to destroy the air boundary layer, thereby improving the heat transfer performance. thermal performance, but increasing the area of ​​the heat exchange fins will increase the volume of the heater, increase the volume of the product, and the cost is high, and the process of slotting the heat exchange fins is complicated and will generate greater resistance. And when the heat exchanger is running under wet conditions, due to the surface tension of water, it is easy to form a water bridge at the opening, which is not conducive to heat exchange and easy to frost

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