Finned heat exchanger provided with row-distance-variable communication holes

Abstract

The invention provides a heat exchanger. The heat exchanger comprises two headers and heat exchanging tubes which are arranged between the two headers; each heat exchanging tube is a flat heat exchanging tube; fins are arranged in each flat tube; each fin comprises an inclined part; the inclined parts are used for isolating fluid passages to form a plurality of small passages; the same inclined part is provided with a plurality of rows of communication holes; the distance between every two adjacent rows of communication holes are represented by S2; the S2s in different flat heat exchanging tubes are different in value; the farther the distances away from an inlet tube are, the smaller the S2s are. According to the heat exchanger provided by the invention, the distances between every two adjacent rows of communication holes are set to vary along with the distances away from the inlet tube, so that a fluid can flow into the heat exchanging tube which is small in flow resistance and far away from the inlet tube; therefore, the fluid can be uniformly distributed in the heat exchanging tubes, the heat exchange efficiency is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a shell-and-tube heat exchanger. Background technique [0002] Flat tubes have been widely used in recent years in automotive air conditioning units and in residential or commercial air conditioning heat exchangers. This kind of flat tube is provided with multiple small channels inside, and when in use, the heat exchange fluid flows through the multiple channels in the flat tube. Because the heat exchange area of ​​the flat tube is large, the heat exchange effect can be greatly improved. [0003] In the prior art, there is a problem of uneven flow distribution caused by the distance between the heat exchange tube and the inlet tube. For example, the closer the distance to the inlet tube, the more fluid flow in the heat exchange tube; Fluid flow is less. In the prior art, the flow distribution or pressure distribution components are installed in the header to make the flow distribution in th...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a new shell-and-tube heat exchanger, so as to solve the problem of uneven internal pressure in the case of heat exchange by heat exchange tubes

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